CN111800247A

CN111800247A - Information transmission method and device

Info

Publication number: CN111800247A
Application number: CN202010442442.7A
Authority: CN
Inventors: 刘鹍鹏; 刘江华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-05-29
Filing date: 2014-05-29
Publication date: 2020-10-20
Also published as: CN108809607A; CN108737059A; WO2015180098A1; CN108809607B; CN106465354A; CN106465354B; CN108737059B

Abstract

The embodiment of the invention provides an information transmission method and device. The information transmission method provided by the invention comprises the following steps: the second network equipment selects one of at least two candidate demodulation pilot frequency patterns with the same port number, and maps the demodulation pilot frequency signals to the candidate demodulation pilot frequency patterns, wherein the port number is equal to the layer number of the data stream; wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns contains physical Resource Elements (REs) occupied by non-zero power demodulation pilot signals and physical Resource Elements (REs) occupied by zero power demodulation pilot signals; and the second network equipment sends the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network equipment. The embodiment of the invention realizes the configuration of different demodulation pilot frequency patterns for different first network equipment, avoids the interference to other first network equipment and increases the number of multiplexing users.

Description

Information transmission method and device

Technical Field

The present invention relates to communications technologies, and in particular, to an information transmission method and apparatus.

Background

A 3D multi-antenna technology such as a dynamic three-dimensional (3D) beamforming technology has attracted deep attention in the industry as a key technology for improving cell edge user throughput, cell user total throughput, and average throughput. According to the 3D channel information estimated by the user side, the 3-dimensional beam forming weight of the active antenna end is adjusted, so that the main lobe of the beam is aligned to a target user in a 3-dimensional space, the received signal power is greatly improved, the signal-to-interference-and-noise ratio is improved, and the throughput of the whole system is further improved. The 3D beamforming technology needs to be based on an Active Antenna System (AAS), and the AAS provides a vertical degree of freedom compared to a conventional Antenna. The multi-user multiple input multiple output (MU MIMO) technology means that multiple users can multiplex the same time-frequency resource and are spatially distinguished by different beamforming weights. Due to the introduction of 3D beamforming technology, the number of spatially multiplexed users increases.

In a Long Term Evolution (LTE) system in the prior art, only 4 paired users are maximally supported in the configuration of a demodulation pilot signal (DMRS). Fig. 1 is a schematic diagram of a demodulation pilot signal configuration in the prior art, and as shown in fig. 1, a physical resource Block pair (PRB pair for short) includes: 12 × 14 physical Resource Elements (REs), 12 demodulation pilot subcarriers, and 2 time slots, each time slot has 7 OFDM symbols, and the horizontal axis represents time t and the vertical axis represents frequency f. The RE where the DMRS is located is the position where the gray shaded RE is located in the figure. REs in the diagonal line represent Common Reference Signals (CRS), where 4 users perform MU MIMO multiplexing, UE1, UE2, UE3, and UE 4. The multiplexing of the DMRS adopts a mode of combining different orthogonal spread spectrum codes and different scrambling codes. The orthogonal spreading codes are applied to the REs where two adjacent OFDM symbols of the DMRS are located. The UE1 uses the orthogonal spread spectrum code (1,1), the scrambling code is generated by nscid 0; the UE2 uses orthogonal spreading codes (1, -1), and the same scrambling code is generated using nscid 0; UE1 and UE2 are therefore completely orthogonal (the orthogonal spreading and scrambling codes described above are also used on slot 2). The UE3 uses the orthogonal spread spectrum code (1,1), the scrambling code is generated by nscid 1; the UE4 uses orthogonal spreading codes (1, -1), and the same scrambling code is generated using nscid 1; so UE3 and UE4 are completely orthogonal. The multiplexing mode is the same in both slots.

The problem in the prior art is that the DMRS configuration cannot satisfy the pilot multiplexing of the increased users.

Disclosure of Invention

Embodiments of the present invention provide an information transmission method and apparatus, so as to overcome a problem that in the prior art, the configuration of a DMRS cannot meet pilot multiplexing of increased users.

In a first aspect, an embodiment of the present invention provides an information transmission method, including:

the second network equipment determines one of at least two candidate demodulation pilot frequency patterns with the same port number, and maps the demodulation pilot frequency signal to a time frequency resource corresponding to the demodulation pilot frequency pattern, wherein the port number is equal to the layer number of the data stream;

wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns contains physical Resource Elements (REs) occupied by non-zero power demodulation pilot signals and physical Resource Elements (REs) occupied by zero power demodulation pilot signals;

and the second network equipment sends the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network equipment.

With reference to the first aspect, in a first implementation manner of the first aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

in at least one candidate demodulation pilot pattern, the position of the RE occupied by the non-zero power demodulation pilot signal corresponds to the position of the RE occupied by the zero power demodulation pilot signal in the remaining at least one candidate demodulation pilot pattern.

With reference to the first aspect, in a second implementation manner of the first aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

in at least one candidate demodulation pilot pattern, the positions of REs occupied by all the non-zero power demodulation pilot signals and the positions of REs occupied by all the zero power demodulation pilot signals correspond to the positions of REs occupied by the non-zero power demodulation pilot signals in the remaining at least one candidate demodulation pilot pattern.

With reference to the first aspect or the first implementation manner of the first aspect, in a third implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero-power demodulation pilot signal is different from a time interval occupied by at least one zero-power demodulation pilot signal, and a frequency bandwidth occupied by the non-zero-power demodulation pilot signal is also different from a frequency bandwidth occupied by the zero-power demodulation pilot signal.

With reference to the first aspect, or the first and third implementation manners of the first aspect, in a fourth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are different from time intervals occupied by all the zero power demodulation pilot signals.

With reference to the first aspect or the first and third implementation manners of the first aspect, in a fifth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by all the non-zero power demodulation pilot signals are different from frequency bandwidths occupied by all the zero power demodulation pilot signals.

With reference to the first aspect or the first implementation manner of the first aspect, in a sixth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on a frequency bandwidth where an adjacent demodulation pilot signal is located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

in at least one candidate demodulation pilot frequency pattern, the non-zero power demodulation pilot frequency signal and the zero power demodulation pilot frequency signal occupy different frequency bandwidth in the time interval of the adjacent demodulation pilot frequency signal; the time interval is a first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a seventh implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the first aspect, in an eighth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals within a first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a ninth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

With reference to the ninth implementation manner of the first aspect, in a tenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in an eleventh implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

in at least one candidate demodulation pilot frequency pattern, the non-zero power demodulation pilot frequency signals occupy different frequency bandwidths on the time interval of adjacent demodulation pilot frequency signals; the time interval is a first time interval.

With reference to the eleventh implementation manner of the first aspect, in a twelfth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to sixth implementation manners of the first aspect, in a thirteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the first aspect, in a fourteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth, where the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a fifteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

With reference to the fifteenth implementation manner of the first aspect, in a sixteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the first aspect, in a seventeenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

in at least one candidate demodulation pilot pattern, the frequency bandwidth occupied by the zero-power demodulation pilot signal in the time interval occupied by the adjacent demodulation pilot signals is different; the time interval is a first time interval.

With reference to the seventeenth implementation manner of the first aspect, in an eighteenth implementation manner of the first aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the zero-power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the first aspect, in a nineteenth implementation manner of the first aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the first aspect, in a twentieth implementation manner of the first aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the first aspect or any one of the first to twenty-first implementation manners of the first aspect, in a twenty-first implementation manner of the first aspect, the at least two candidate pilot patterns are sent to the first network device through dynamic signaling or high layer signaling.

With reference to the twenty-first implementation manner of the first aspect, in a twenty-second implementation manner of the first aspect, the dynamic signaling or the higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user group specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

With reference to the first aspect or any one of the first to twenty-second implementation manners of the first aspect, in a twenty-third implementation manner of the first aspect, one of the at least two candidate pilot patterns is sent to the first network device through dynamic signaling or higher layer signaling.

In a second aspect, an embodiment of the present invention provides an information transmission method, including:

the first network equipment obtains a demodulation pilot frequency pattern according to the received demodulation pilot frequency configuration information and receives a demodulation pilot frequency signal according to the corresponding demodulation pilot frequency pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream;

wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns contains physical Resource Elements (REs) occupied by non-zero power demodulation pilot signals and physical Resource Elements (REs) occupied by zero power demodulation pilot signals.

With reference to the second aspect, in a first implementation manner of the second aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the second aspect, in a second implementation manner of the second aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the second aspect or the first implementation manner of the second aspect, in a third implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal is different from a time interval occupied by at least one zero power demodulation pilot signal, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal is different from a frequency bandwidth occupied by the zero power demodulation pilot signal.

With reference to the second aspect, or the first and third implementations of the second aspect, in a fourth implementation of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero-power demodulation pilot signals are different from time intervals occupied by all the zero-power demodulation pilot signals.

With reference to the second aspect or the first and third implementations of the second aspect, in a fifth implementation of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by all the non-zero-power demodulation pilot signals and frequency bandwidths occupied by all the zero-power demodulation pilot signals are different.

With reference to the second aspect or the first implementation manner of the second aspect, in a sixth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to any one of the third to sixth implementation manners of the second aspect, in a seventh implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the second aspect, in an eighth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a ninth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

With reference to the ninth implementation manner of the second aspect, in a tenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in an eleventh implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the eleventh implementation manner of the second aspect, in the at least one candidate demodulation pilot pattern in the twelfth implementation manner of the second aspect, the time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and the frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to sixth implementation manners of the second aspect, in a thirteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the second aspect, in a fourteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth, the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a fifteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

With reference to the fifteenth implementation manner of the second aspect, in the sixteenth implementation manner of the second aspect, in the at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the second aspect, in a seventeenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the seventeenth implementation manner of the second aspect, in an eighteenth implementation manner of the second aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the zero-power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the second aspect, in a nineteenth implementation manner of the second aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the second aspect, in a twentieth implementation manner of the second aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the second aspect or any one of the third to the twenty-first implementation manners of the second aspect, in a twenty-first implementation manner of the second aspect, the first network device receives the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

With reference to the twenty-first implementation manner of the second aspect, in a twenty-second implementation manner of the second aspect, the first network device is a user equipment, and the second network device is a base station; or the like, or, alternatively,

the first network equipment is user equipment, and the second network equipment is user equipment; or the like, or, alternatively,

the first network device is a network device, and the second network device is a network device.

With reference to the twenty-first implementation manner of the second aspect, in a twenty-third implementation manner of the second aspect, the dynamic signaling or the higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

With reference to the second aspect or any one of the first to twenty-third implementation manners of the second aspect, in a twenty-fourth implementation manner of the second aspect, the first network device receives one of the at least two candidate pilot patterns that is sent by the second network device through dynamic signaling or higher layer signaling.

In a third aspect, an embodiment of the present invention provides an information transmission apparatus, including:

a mapping module, configured to determine one of at least two candidate demodulation pilot patterns with the same port number, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, where the port number is equal to the number of layers of a data stream;

and the sending module is used for sending the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network equipment.

With reference to the third aspect, in a first implementation manner of the third aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the third aspect, in a second implementation manner of the third aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the third aspect or the first implementation manner of the third aspect, in a third implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal is different from a time interval occupied by at least one zero power demodulation pilot signal, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal is also different from a frequency bandwidth occupied by a zero power demodulation pilot signal.

With reference to the third aspect or the first and third implementation manners of the third aspect, in a fourth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are different from time intervals occupied by all the zero power demodulation pilot signals.

With reference to the third aspect or the first and third implementation manners of the third aspect, in a fifth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by all the non-zero power demodulation pilot signals are different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

With reference to the third aspect or the first implementation manner of the third aspect, in a sixth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on a frequency bandwidth where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in a seventh implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the third aspect, in an eighth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals within a first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in a ninth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

With reference to the ninth implementation manner of the third aspect, in a tenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in an eleventh implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the eleventh implementation manner of the third aspect, in a twelfth implementation manner of the third aspect, in the at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in a thirteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the third aspect, in a fourteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth, the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in a fifteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

With reference to the fifteenth implementation manner of the third aspect, in a sixteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to the third aspect or any one of the first to third implementation manners of the third aspect, in a seventeenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the seventeenth implementation manner of the third aspect, in an eighteenth implementation manner of the third aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the zero-power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the third aspect, in a nineteenth implementation manner of the third aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the third aspect, in a twentieth implementation manner of the third aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a physical resource block PRB.

With reference to the third aspect or any one of the first to twenty-third implementation manners of the third aspect, in a twenty-first implementation manner of the third aspect, the at least two candidate pilot patterns are sent to the first network device through dynamic signaling or higher layer signaling.

With reference to the twenty-first implementation manner of the third aspect, in a twenty-second implementation manner of the third aspect, the dynamic signaling or the higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

With reference to the third aspect or any one of the first to twenty-second implementation manners of the third aspect, in a twenty-third implementation manner of the third aspect, one of the at least two candidate pilot patterns is sent to the first network device through dynamic signaling or higher layer signaling.

In a fourth aspect, an embodiment of the present invention provides an information transmission apparatus, including:

the acquisition module is used for acquiring demodulation pilot frequency patterns according to the received demodulation pilot frequency configuration information and receiving demodulation pilot frequency signals according to the corresponding demodulation pilot frequency patterns; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream;

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the fourth aspect, in a second implementation manner of the fourth aspect, the at least two candidate demodulation pilot patterns with the same port number are different, and the method includes:

With reference to the fourth aspect or the first implementation manner of the fourth aspect, in a third implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one non-zero power demodulation pilot signal is different from a time interval occupied by at least one zero power demodulation pilot signal, and a frequency bandwidth occupied by the non-zero power demodulation pilot signal is different from a frequency bandwidth occupied by the zero power demodulation pilot signal.

With reference to the fourth aspect or the first and third implementations of the fourth aspect, in a fourth implementation of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero-power demodulation pilot signals are different from time intervals occupied by all the zero-power demodulation pilot signals.

With reference to the fourth aspect or the first and third implementations of the fourth aspect, in a fifth implementation of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by all the non-zero-power demodulation pilot signals and frequency bandwidths occupied by all the zero-power demodulation pilot signals are different.

With reference to the fourth aspect or the first implementation manner of the fourth aspect, in a sixth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on a frequency bandwidth where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to any one of the third to sixth implementation manners of the fourth aspect, in a seventh implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the seventh implementation manner of the fourth aspect, in an eighth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the fourth aspect, in a ninth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

With reference to the ninth implementation manner of the fourth aspect, in a tenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the fourth aspect, in an eleventh implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the eleventh implementation manner of the fourth aspect, in the twelfth implementation manner of the fourth aspect, in the at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to sixth implementation manners of the fourth aspect, in a thirteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by all the zero-power demodulation pilot signals are the same; the time interval is a first time interval.

With reference to the thirteenth implementation manner of the fourth aspect, in a fourteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth, the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

With reference to any one of the third to sixth implementation manners of the fourth aspect, in a fifteenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

With reference to the fifteenth implementation manner of the fourth aspect, in the sixteenth implementation manner of the fourth aspect, in the at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

With reference to any one of the third to sixth implementation manners of the fourth aspect, in a seventeenth implementation manner of the fourth aspect, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

With reference to the seventeenth implementation manner of the fourth aspect, in an eighteenth implementation manner of the fourth aspect, in the at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the zero-power demodulation pilot signals are distributed at equal intervals.

With reference to any one of the third to eighteenth implementation manners of the fourth aspect, in a nineteenth implementation manner of the fourth aspect, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing OFDM symbol.

With reference to any one of the third to eighteenth implementation manners of the fourth aspect, in a twentieth implementation manner of the fourth aspect, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

With reference to the fourth aspect or any one of the third to twenty-first implementation manners of the fourth aspect, in a twenty-first implementation manner of the fourth aspect, the obtaining module is specifically configured to: and receiving the at least two candidate pilot patterns sent by the second network equipment through dynamic signaling or higher layer signaling.

With reference to the twenty-first implementation manner of the fourth aspect, in a twenty-second implementation manner of the fourth aspect, the first network device is a user equipment, and the second network device is a base station; or the like, or, alternatively,

With reference to the twenty-first implementation manner of the fourth aspect, in a twenty-third implementation manner of the fourth aspect, the dynamic signaling or the higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

With reference to the fourth aspect or any one of the first to twenty-third implementation manners of the fourth aspect, in a twenty-fourth implementation manner of the fourth aspect, the obtaining module is specifically configured to: receiving one of the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

In a fifth aspect, an embodiment of the present invention provides a second network device, including:

a processor and a memory, the memory storing execution instructions, the processor and the memory communicating when the second network device is running, execution of the execution instructions by the processor causing the second network device to perform the method of any of the first aspects.

In a sixth aspect, an embodiment of the present invention provides a first network device, including:

a processor and a memory, the memory storing execution instructions that, when executed by the first network device, communicate between the processor and the memory, execution of the execution instructions by the processor causing the first network device to perform the method of any of the second aspects.

The demodulation pilot frequency configuration method and the demodulation pilot frequency configuration device determine one of at least two candidate demodulation pilot frequency patterns with the same port number through second network equipment, and map demodulation pilot frequency signals to the demodulation pilot frequency patterns, wherein the port number is equal to the layer number of data streams; at least two candidate demodulation pilot patterns with the same port number are different, at least one candidate demodulation pilot pattern comprises a physical Resource Element (RE) occupied by a non-zero-power demodulation pilot signal and a physical Resource Element (RE) occupied by a zero-power demodulation pilot signal, and configuration information of the mapped demodulation pilot signal and demodulation pilot signal is sent to the first network equipment, so that different demodulation pilot patterns are configured for different first network equipment, and interference on other first network equipment is avoided, therefore, the number of multiplexing users can be increased, and the problem that the configuration of the DMRS pilot in the prior art cannot meet the pilot multiplexing of the increased users is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a demodulation pilot signal configuration in the prior art;

FIG. 2 is a flowchart of a first embodiment of a demodulation pilot signal allocation method according to the present invention;

fig. 3 is a schematic diagram of a candidate demodulation pilot pattern according to a first embodiment of the present invention;

fig. 4 is a schematic diagram of a second candidate demodulation pilot pattern according to the first embodiment of the present invention;

fig. 5 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 5A is a schematic diagram of a second candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 6 is a schematic diagram of a third candidate demodulation pilot pattern according to the second embodiment of the present invention;

fig. 7 is a schematic diagram of a fourth candidate demodulation pilot pattern according to the second embodiment of the present invention;

fig. 8 is a fifth schematic diagram of a candidate demodulation pilot pattern according to the second embodiment of the present invention;

fig. 9 is a sixth schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 10 is a seventh schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 11 is a schematic diagram eight illustrating candidate demodulation pilot patterns according to the second embodiment of the present invention;

fig. 12 is a diagram illustrating a candidate demodulation pilot pattern according to a second embodiment of the present invention;

fig. 13 is a schematic diagram of a candidate demodulation pilot pattern according to a third embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a network device according to a first embodiment of the present invention;

fig. 15 is a schematic structural diagram of a first network device according to a first embodiment of the present invention;

fig. 16 is a schematic structural diagram of a second network device according to the embodiment of the present invention;

fig. 17 is a schematic structural diagram of a second network device according to a first embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 2 is a flowchart of a first embodiment of an information transmission method according to the present invention. Fig. 3 is a schematic diagram of a candidate demodulation pilot pattern according to a first embodiment of the present invention; the pattern may refer to a corresponding position relationship, where the corresponding position relationship indicates the positions of the subcarriers and the OFDM symbols where the pilot signals are located. Fig. 4 is a schematic diagram of a second candidate demodulation pilot pattern according to the first embodiment of the present invention. The execution subject of this embodiment may be a second network device such as a base station. The scheme of the embodiment is applied between the second network device and the first network device to perform the configuration of the demodulation pilot signal. In the embodiment of the present invention, the first network device may be a user equipment, and the second network device may be a base station; or the first network device and the second network device are both user equipment; alternatively, the first network device and the second network device are both network devices (e.g., base stations, etc.). As shown in fig. 2, the method of this embodiment may include:

step 201, the second network device determines one of at least two candidate demodulation pilot frequency patterns with the same port number, and maps the demodulation pilot frequency signal to the time frequency resource corresponding to the demodulation pilot frequency pattern, wherein the port number is equal to the layer number of the data stream; at least two candidate demodulation pilot patterns with the same port number are different, and at least one candidate demodulation pilot pattern comprises physical Resource Elements (RE) occupied by non-zero power demodulation pilot signals and physical Resource Elements (RE) occupied by zero power demodulation pilot signals.

Specifically, as shown in fig. 3 and 4, two candidate demodulation pilot patterns are shown, in the embodiment of the present invention, it is determined that one of the at least two candidate demodulation pilot patterns maps a demodulation pilot signal into the demodulation pilot pattern, the port numbers corresponding to the at least two candidate demodulation pilot patterns must be the same, and the port number is equal to the number of layers of a data stream, and a second network device, such as a base station, selects one of the at least two candidate demodulation pilot patterns with the same port number and maps the demodulation pilot signal onto the demodulation pilot pattern; the candidate demodulation pilot pattern refers to a demodulation pilot pattern used when the base station allocates a single physical resource block to perform channel estimation on PRB pair for the first network device, such as the user equipment UE. Each candidate demodulation pilot pattern comprises a plurality of REs, and gray

And gray square

RE is RE occupied by demodulation pilot signal, and RE of oblique line part

Representing the common pilot. The port number refers to the number of logical antenna ports, which is equal to the number of layers of the data stream.

At least two candidate demodulation pilot patterns with the same port number are different, and each candidate demodulation pilot pattern comprises physical Resource Elements (RE) occupied by non-zero power demodulation pilot signals and physical Resource Elements (RE) occupied by zero power demodulation pilot signals. As shown in fig. 3, REs occupied by the non-zero-power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM (from left to right) symbols on the 2 nd, 7 th and 12 th subcarriers (from bottom to top in fig. 3), and REs occupied by the zero-power DMRS are REs (gray squares REs) at positions of 13 th and 14 th OFDM symbols on the 2 nd, 7 th and 12 th subcarriers.

Optionally, at least two candidate demodulation pilot patterns with the same port number are different, including:

the position of the RE occupied by the non-zero power demodulation pilot signal in at least one candidate demodulation pilot pattern corresponds to the position of the RE occupied by the zero power demodulation pilot signal in the rest at least one candidate demodulation pilot pattern.

It should be noted that, in the embodiment of the present invention, only the first network device is used as the user equipment UE for description, but not limited to this, the scheme of the present invention may also be used between network devices or between user equipments.

Specifically, in the candidate demodulation pilot pattern shown in fig. 4, the RE occupied by the non-zero-power DMRS and the physical resource element RE occupied by the zero-power DMRS are exactly opposite to those in the candidate demodulation pilot pattern shown in fig. 3, that is, the RE occupied by the non-zero-power DMRS in fig. 4 corresponds to the RE occupied by the zero-power DMRS in fig. 3, and the RE occupied by the zero-power DMRS in fig. 4 corresponds to the RE occupied by the non-zero-power DMRS in fig. 3.

The multiplexing of the DMRS adopts a mode of combining different orthogonal spread spectrum codes and different scrambling codes. The orthogonal spreading codes are applied to the REs where two adjacent OFDM symbols of the DMRS are located. With the configuration manners in fig. 3 and 4, 4 pieces of user equipment may perform MU MIMO multiplexing, that is, 8 pieces of user equipment are used for multiplexing, that is, UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE 8. Grouping the UE1, UE2, UE5, and UE6 into a group, which uses the configuration shown in fig. 3, that is, the REs at the positions of the 6 th and 7 th OFDM symbols on the 2 th, 7 th, and 12 th subcarriers are used by the UE1, UE2, UE5, and UE6 to transmit the demodulation pilot signals; UE3, UE4, UE7, and UE8 are grouped into a group and configured as shown in fig. 4, that is, UE3, UE4, UE7, and UE8 all use REs at positions of 13 th and 14 th OFDM symbols on 2, 7, and 12 subcarriers to transmit demodulation pilot signals; UE1 corresponds to orthogonal spreading code (1,1), the scrambling code being generated according to nscid 0; UE2 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 0; so UE1 and UE2 are completely orthogonal. UE5 corresponds to orthogonal spreading code (1,1), the scrambling code being generated according to nscid 1; UE6 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 1; so UE5 and UE6 are completely orthogonal. The orthogonal spreading codes used by UE1 and UE5 are the same but different in scrambling code, and do not generate interference. The corresponding (1,1) spreading codes of UE1 and UE5 indicate that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by (1,1), and (1, -1) of UE2 and UE6 indicate that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by (1, -1); UE3 corresponds to orthogonal spreading code (1,1), scrambling code generated according to nscid0, UE4 corresponds to orthogonal spreading code (1, -1), scrambling code generated according to nscid 0; so UE3 and UE4 are completely orthogonal. UE7 corresponds to orthogonal spreading code (1,1), scrambling code generated according to nscid1, UE8 corresponds to orthogonal spreading code (1, -1), scrambling code generated according to nscid 1; UE7 and UE8 are therefore perfectly orthogonal; the (1,1) spreading codes corresponding to UE3 and UE7 indicate that two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot is located are spread by using (1, 1); the (1, -1) spreading codes corresponding to UE4 and UE8 indicate that the two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, -1). The RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 do not generate interference on the pilots of the UE1, the UE2, the UE5 and the UE 6; the RE occupied by the zero-power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the non-zero-power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 do not generate interference on the pilots of the UE3, the UE4, the UE7 and the UE 8.

As shown in fig. 1, 3, and 4, there may be 6 users UE1, UE2, UE3, UE4, UE5, and UE6 for MU MIMO multiplexing. The configuration of the UE2 and the group of UEs 5 as shown in fig. 3 is adopted, that is, both UE2 and UE5 transmit demodulation pilot signals using REs at the positions of the 6 th and 7 th OFDM symbols on the 2 th, 7 th and 12 th subcarriers; UE3, UE6 is grouped into a group and configured as shown in fig. 4, that is, both UE3 and UE6 transmit demodulation pilot signals using REs at positions of 13 th and 14 th OFDM symbols on 2, 7 and 12 subcarriers; the UE1 and the UE4 adopt the configuration mode shown in the figure 1 in the prior art; that is, both UE1 and UE4 transmit demodulation pilot signals using REs at positions of 6 th, 7 th and 13 th, 14 th OFDM symbols on 2, 7, 12 th subcarriers; the UE1 indicates that the orthogonal spreading code (1,1,1,1) indicates that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by using (1,1), two REs of the 13 th and 14 th OFDM symbols are also spread by using (1,1), and the scrambling code is generated according to nscid 0; UE2 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 0; UE1 and UE2 are completely orthogonal and do not generate interference; the UE5 corresponds to the orthogonal spreading code (1, -1), and the scrambling code is generated according to nscid 1. Although the orthogonal spreading codes used by the UE2 and the UE5 are the same, the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE2 and UE5 indicate that the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, -1). UE3 corresponds to orthogonal spreading code (1, -1), scrambling code generated according to nscid0, UE4 corresponds to orthogonal spreading code (1,1,1,1), scrambling code generated according to nscid1 (same as UE 1); UE3 and UE4 are completely orthogonal and do not generate interference; UE6 corresponds to orthogonal spreading code (1, -1), the scrambling code is generated according to nscid 1; the (1, -1) spreading codes corresponding to UE3 and UE6 indicate that the two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, -1). Among them, the UE1 and the UE4 are the existing UEs that can only adopt the configuration shown in fig. 1. The RE occupied by the non-zero power demodulation pilot signals of the UE2 and the UE5 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3 and the UE6, so that the UE3 and the UE6 do not generate interference on the pilots of the UE2 and the UE 5. The RE occupied by the non-zero power demodulation pilot signals of the UE3 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE2 and the UE5, so that the UE2 and the UE5 do not generate interference on the pilots of the UE3 and the UE 6.

As shown in fig. 1, 3, and 4, a total of 7 users UE1, UE2, UE3, UE4, UE5, UE6, and UE7 may perform MU MIMO multiplexing. The UE2, UE4, and UE5 are grouped into a group and configured as shown in fig. 3, that is, the UE2, UE4, and UE5 all transmit demodulation pilot signals using REs at positions of 6 th and 7 th OFDM symbols on 2, 7, and 12 th subcarriers; UE3, UE6, and UE7 are grouped into a group and configured as shown in fig. 4, and UE3, UE6, and UE7 all use REs at positions of 13 th and 14 th OFDM symbols on 2, 7, and 12 subcarriers to transmit demodulation pilot signals; the UE1 adopts the configuration shown in fig. 1 in the prior art, that is, the UE1 transmits the demodulation pilot signals using REs at the positions of the 6 th, 7 th and 13 th, 14 th OFDM symbols on the 2, 7, 12 th subcarriers; the UE1 indicates that the orthogonal spreading code (1,1,1,1) indicates that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by using (1,1), two REs of the 13 th and 14 th OFDM symbols are also spread by using (1,1), and the scrambling code is generated according to nscid 0; UE2 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 0; UE1 and UE2 are completely orthogonal and do not generate interference; UE4 corresponds to orthogonal spreading code (1,1), scrambling code is generated according to nscid1, UE5 corresponds to orthogonal spreading code (1, -1), scrambling code is generated according to nscid1, UE4 and UE5 are completely orthogonal without interference; although the orthogonal spreading codes used by the UE2 and the UE5 are the same, the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE2 and UE5 indicate that the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, -1). The (1,1) spreading code corresponding to UE4 indicates that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by using (1, 1); UE3 corresponds to orthogonal spreading code (1, -1), the scrambling code is generated according to nscid 0; UE6 corresponds to orthogonal spreading code (1,1), the scrambling code being generated according to nscid 1; the UE7 corresponds to the orthogonal spread spectrum code (1, -1), the scrambling code is generated according to nscid1, and the UE6 and the UE7 are completely orthogonal without interference; although the orthogonal spreading codes used by the UE3 and the UE7 are the same, the scrambling codes are different, and interference is not generated; the (1, -1) spreading codes corresponding to UE3 and UE7 indicate that the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, -1). The (1,1) spreading code corresponding to UE6 indicates that the two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread with (1, 1). Among them, the UE1 is an existing UE that can only adopt the configuration shown in fig. 1. The RE occupied by the non-zero power demodulation pilot signals of the UE2, the UE4 and the UE5 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE6 and the UE7, so that the pilots of the UE2, the UE4 and the UE5 are not interfered by the UE3, the UE6 and the UE 7; the RE occupied by the zero-power demodulation pilot signals of the UE2, the UE4 and the UE5 is the same as the RE occupied by the non-zero-power demodulation pilot signals of the UE3, the UE6 and the UE7, so that the pilots of the UE3, the UE6 and the UE7 are not interfered by the UE2, the UE4 and the UE 5.

in at least one candidate demodulation pilot pattern, the positions of REs occupied by all non-zero power demodulation pilot signals and the positions of REs occupied by all zero power demodulation pilot signals correspond to the positions of REs occupied by non-zero power demodulation pilot signals in the remaining at least one candidate demodulation pilot pattern.

Specifically, as in the candidate demodulation pilot pattern shown in fig. 3 or 4, REs occupied by all non-zero-power DMRSs and physical resource elements REs occupied by all zero-power DMRSs correspond to positions of REs occupied by non-zero-power demodulation pilot signals in the candidate demodulation pilot pattern shown in fig. 1.

Step 202, the second network device sends the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network device.

Specifically, the second network device sends the configuration information of the demodulation pilot signal and the demodulation pilot signal mapped to the demodulation pilot pattern to the first network device, where the configuration information of the demodulation pilot signal indicates:

a physical resource unit occupied by the non-zero power demodulation pilot signal; or

A physical resource unit occupied by the zero-power demodulation pilot signal; or

A spreading code; or

At least one of scrambling code information.

In this embodiment, a second network device determines one of at least two candidate demodulation pilot patterns with the same number of ports, and maps a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, where the number of ports is equal to the number of layers of a data stream; at least two candidate demodulation pilot patterns with the same port number are different, at least one candidate demodulation pilot pattern comprises a physical Resource Element (RE) occupied by a non-zero-power demodulation pilot signal and a physical Resource Element (RE) occupied by a zero-power demodulation pilot signal, and configuration information of the mapped demodulation pilot signal and demodulation pilot signal is sent to the first network equipment, so that different demodulation pilot patterns are configured for different first network equipment, and interference to other first network equipment is avoided, therefore, the number of multiplexing users can be increased, and the problem that in the prior art, pilot multiplexing of increased users cannot be met by DMRS configuration is solved.

Fig. 5 is a schematic diagram of a candidate demodulation pilot pattern according to a second embodiment of the present invention. Fig. 5A is a schematic diagram of a second candidate demodulation pilot pattern according to a second embodiment of the method of the present invention. Fig. 6 is a schematic diagram of a third candidate demodulation pilot pattern according to the second embodiment of the present invention. Fig. 7 is a diagram illustrating a fourth candidate demodulation pilot pattern according to the second embodiment of the present invention. Fig. 8 is a fifth schematic diagram of candidate demodulation pilot patterns according to the second embodiment of the present invention. Fig. 9 is a sixth schematic diagram of candidate demodulation pilot patterns according to the second embodiment of the present invention. Fig. 10 is a diagram illustrating a candidate demodulation pilot pattern according to a second embodiment of the present invention. Fig. 11 is a diagram eight illustrating candidate demodulation pilot patterns according to the second embodiment of the present invention. Fig. 12 is a diagram illustrating a candidate demodulation pilot pattern according to a second embodiment of the present invention. On the basis of the embodiment of the method shown in fig. 1, in this embodiment, in at least one candidate demodulation pilot pattern, the time interval occupied by at least one non-zero-power demodulation pilot signal is different from the time interval occupied by at least one zero-power demodulation pilot signal, and the frequency bandwidth occupied by the non-zero-power demodulation pilot signal is also different from the frequency bandwidth occupied by the zero-power demodulation pilot signal.

Or

In at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are different from time intervals occupied by all the zero power demodulation pilot signals, and frequency bandwidths occupied by all the non-zero power demodulation pilot signals are also different from frequency bandwidths occupied by all the zero power demodulation pilot signals.

Specifically, in the candidate demodulation pilot pattern shown in fig. 5, the REs occupied by the non-zero-power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM (counted from left to right) symbols on the 2 nd, 7 th and 12 th subcarriers (counted from bottom to top in fig. 5), and the REs occupied by the zero-power DMRS are REs (gray grid REs) at positions of 13 th and 14 th OFDM symbols on the 1 st, 6 th and 11 th subcarriers. All the time intervals occupied by the non-zero power demodulation pilot signals are the time length of a first time slot, all the time intervals occupied by the zero power demodulation pilot signals are the time length of a second time slot, therefore, all the time intervals occupied by the non-zero power demodulation pilot signals are different from the time intervals occupied by all the zero power demodulation pilot signals, all the frequency bandwidths occupied by the non-zero power demodulation pilot signals are sub-carriers 2, 7 and 12, and all the frequency bandwidths occupied by the zero power demodulation pilot signals are the frequency widths of sub-carriers 1, 6 and 11, therefore, all the frequency bandwidths occupied by the non-zero power demodulation pilot signals are also different from the frequency bandwidths occupied by all the zero power demodulation pilot signals.

The multiplexing mode of the DMRS may adopt the following mode: with the configuration shown in fig. 5 and 5A, 4 users may perform MU MIMO multiplexing, that is, 8 users may perform multiplexing, respectively, UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE 8. Grouping the UE1, UE2, UE5, and UE6 into a group, which uses the configuration shown in fig. 5, that is, the REs at the positions of the 6 th and 7 th OFDM symbols on the 2 th, 7 th, and 12 th subcarriers are used by the UE1, UE2, UE5, and UE6 to transmit the demodulation pilot signals; UE3, UE4, UE7, and UE8 are grouped into a group, and the configuration shown in fig. 5A is adopted, that is, the RE at the position of the 13 th OFDM symbol and the 14 th OFDM symbol on the 1 st subcarrier, the RE at the position of the 6 th subcarrier and the RE at the position of the 14 th OFDM symbol are all adopted by UE3, UE4, UE7, and UE8 to transmit the demodulation pilot signals; UE1 corresponds to orthogonal spreading code (1,1), the scrambling code being generated according to nscid 0; UE2 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 0; so UE1 and UE2 are completely orthogonal. UE5 corresponds to orthogonal spreading code (1,1), the scrambling code being generated according to nscid 1; UE6 corresponds to orthogonal spreading code (1, -1), also scrambling code generated according to nscid 1; so UE5 and UE6 are completely orthogonal. Although the orthogonal spreading codes used by the UE1 and the UE5 are the same, the scrambling codes are different, and interference is not generated; the corresponding (1,1) spreading codes of UE1 and UE5 indicate that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by (1,1), and (1, -1) of UE2 and UE6 indicate that two REs of the 6 th and 7 th OFDM symbols on the subcarrier where each pilot is located are spread by (1, -1). UE3 corresponds to orthogonal spreading code (1,1), scrambling code generated according to nscid0, UE4 corresponds to orthogonal spreading code (1, -1), scrambling code generated according to nscid 0; so UE3 and UE4 are completely orthogonal. UE7 corresponds to orthogonal spreading code (1,1), scrambling code generated according to nscid1, UE8 corresponds to orthogonal spreading code (1, -1), scrambling code generated according to nscid 1; UE7 and UE8 are therefore perfectly orthogonal; the spreading codes (1,1) corresponding to the UE3 and the UE7 indicate that two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot is located are spread by (1,1), and the spreading codes (1, -1) corresponding to the UE4 and the UE8 indicate that two REs of the 13 th and 14 th OFDM symbols on the subcarrier where each pilot is located are spread by (1, -1). The RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 do not generate interference on the pilots of the UE1, the UE2, the UE5 and the UE 6; the RE occupied by the zero-power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the non-zero-power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 do not generate interference on the pilots of the UE3, the UE4, the UE7 and the UE 8.

There may also be other numbers of user multiplexing modes, similar to those in the first embodiment, and will not be described here again.

Optionally, in the at least one candidate demodulation pilot pattern, a time interval occupied by all non-zero power demodulation pilot signals and a time interval occupied by all zero power demodulation pilot signals are different.

Specifically, the candidate demodulation pilot patterns shown in fig. 3 and 4 may be adopted in the above case, as shown in fig. 3, the time interval occupied by all the non-zero-power demodulation pilot signals is the time length of the first time slot, and the time interval occupied by all the zero-power demodulation pilot signals is the time length of the second time slot, so that the time interval occupied by all the non-zero-power demodulation pilot signals is different from the time interval occupied by all the zero-power demodulation pilot signals, and details are not repeated here.

Optionally, in the at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all zero power demodulation pilot signals.

Specifically, as in the candidate demodulation pilot pattern shown in fig. 6, the REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM symbols on the 12 th subcarrier, and REs (gray REs) at positions of 13 th and 14 th OFDM symbols on the 12 th subcarrier; REs occupied by the zero-power DMRS are REs (gray-shaded REs) at positions of 6 th and 7 th OFDM symbols on the 2 nd and 7 th subcarriers, and REs (gray-shaded REs) at positions of 13 th and 14 th OFDM symbols on the 2 nd and 7 th subcarriers. The RE occupied by the non-zero power DMRS and the physical resource element RE occupied by the zero power DMRS in the candidate demodulation pilot pattern shown in fig. 7 are the exact opposite of those in fig. 6, that is, the RE occupied by the non-zero power DMRS in fig. 7 corresponds to the RE occupied by the zero power DMRS in fig. 6, and the RE occupied by the zero power DMRS in fig. 7 corresponds to the RE occupied by the non-zero power DMRS in fig. 6. The frequency bandwidth occupied by all non-zero power demodulation pilot signals in the above pattern is different from the frequency bandwidth occupied by all zero power demodulation pilot signals, where the frequency bandwidth is, for example, the width of the frequency of the subcarrier. Such candidate demodulation pilot patterns may increase sampling in time, improving performance of channel estimation.

The candidate demodulation pilot patterns shown in fig. 8 and 9 are similar to the candidate demodulation pilot patterns shown in fig. 6 and 7, and are not repeated here.

As shown in fig. 10, the frequency bandwidth occupied by all non-zero power demodulation pilot signals of the candidate demodulation pilot patterns is different from the frequency bandwidth occupied by all zero power demodulation pilot signals, where the frequency bandwidth is, for example, the width of the frequency of a PRB. The REs occupied by the non-zero-power DMRS are the REs (gray REs) of the second PRB pair (from bottom to top) at the positions of the 6 th, 7 th, and 13 th, 14 th OFDM (from left to right) symbols on the 2 nd, 7 th, 12 th subcarriers (from bottom to top), and the REs occupied by the zero-power DMRS are the REs (gray squares REs) of the first PRB pair (from bottom to top) at the positions of the 6 th, 7 th, and 13 th, 14 th OFDM symbols on the 2 th, 7 th, 12 th subcarriers.

Alternatively, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing, OFDM, symbol.

Alternatively, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

Optionally, in the at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on the frequency bandwidth where the adjacent demodulation pilot signal is located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

in at least one candidate demodulation pilot frequency pattern, the non-zero power demodulation pilot frequency signal and the zero power demodulation pilot frequency signal occupy different frequency bandwidth on the time interval of the adjacent demodulation pilot frequency signal; the time interval is a first time interval.

Specifically, as in the candidate demodulation pilot pattern shown in fig. 11, the REs occupied by the non-zero power DMRS are REs (gray REs) at positions of 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers, and REs (gray REs) at positions of 13 th and 14 th OFDM symbols on the 7 th subcarrier; REs occupied by the zero-power DMRS are REs (gray-shaded REs) at the positions of the 6 th and 7 th OFDM symbols on the 7 th subcarrier, and REs (gray-shaded REs) at the positions of the 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers. Namely, the time intervals occupied by the non-zero power DMRSs on the subcarriers such as 2 and 7 where the adjacent demodulation pilot signals are located are respectively the time lengths of a first time slot and a second time slot, while the time intervals occupied by the zero power DMRS are respectively the time lengths of the second time slot and the first time slot, namely the time intervals are different, and the time intervals at this time are time slots; or the subcarriers occupied by the non-zero power DMRS and the zero power DMRS on the adjacent time slots are different. The RE occupied by the non-zero power DMRS and the physical resource element RE occupied by the zero power DMRS in the candidate demodulation pilot pattern shown in fig. 12 are the exact opposite of those in fig. 11, that is, the RE occupied by the non-zero power DMRS in fig. 12 corresponds to the RE occupied by the zero power DMRS in fig. 11, and the RE occupied by the zero power DMRS in fig. 12 corresponds to the RE occupied by the non-zero power DMRS in fig. 11.

This can increase the time sampling and improve the performance of channel estimation compared with the candidate demodulation pilot patterns in fig. 3 and 4.

The multiplexing mode of the DMRS may adopt the following mode: with the configuration in fig. 11 and 12, 4 users may perform MU MIMO multiplexing, that is, 8 users may perform multiplexing, respectively, UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE 8. Grouping the UEs 1, 2, 5 and 6 into a group, using the configuration shown in fig. 11, that is, the UEs 1, 2, 5 and 6 all use the RE at the position of the 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers and the RE at the position of the 13 th and 14 th OFDM symbols on the 7 th subcarrier to transmit the demodulation pilot signals; the UE3, UE4, UE7, and UE8 are grouped into a group and configured as shown in fig. 12, and the configuration is the reverse of fig. 11, that is, the REs at positions of 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers and the REs at positions of 6 th and 7 th OFDM symbols on the 7 th subcarrier are all used by the UE3, UE4, UE7, and UE8 to transmit demodulation pilot signals. The UE1 corresponds to an orthogonal spreading code (1,1) on the 2 nd and 12 th sub-carriers and an orthogonal spreading code (1,1) on the 7 th sub-carrier, and the scrambling code is generated according to nscid 0; UE2 corresponds to orthogonal spreading code (1, -1) on the 2 nd and 12 th sub-carriers and orthogonal spreading code (1, -1) on the 7 th sub-carrier, and UE2 is completely orthogonal to UE1, and the scrambling code is generated according to nscid 0. The orthogonal spreading codes corresponding to the UE5 and the UE6 and the UE1 and the UE2 are the same, and scrambling codes are generated according to nscid 1; so UE5 and UE6 are completely orthogonal. UE1 and UE5, and UE2 and UE6 use the same orthogonal spreading codes but different scrambling codes, and do not generate interference; the corresponding (1,1) spreading codes of UE1 and UE5 indicate that two REs of the 6 th and 7 th OFDM symbols on subcarriers 2 and 12 where the pilot is located are spread by (1,1), and two REs of the 13 th and 14 th OFDM symbols on subcarrier 7 where the pilot is located are spread by (1,1), and UE2 and UE6 are similar to UE1 and UE 5. UE3 corresponds to orthogonal spreading code (1,1) on the 2 nd and 12 th sub-carriers and orthogonal spreading code (1,1) on the 7 th sub-carrier, the scrambling code is generated according to nscid0, UE4 corresponds to orthogonal spreading code (1, -1) on the 2 nd and 12 th sub-carriers and orthogonal spreading code (1, -1) on the 7 th sub-carrier, UE4 is fully orthogonal to UE3, and the scrambling code is generated according to nscid 0. The orthogonal spreading codes corresponding to the UE7 and the UE8 and the UE3 and the UE4 are the same, and scrambling codes are generated according to nscid 1; so UE7 and UE8 are completely orthogonal. UE3 and UE7, and UE4 and UE8 use the same orthogonal spreading codes but different scrambling codes, and do not generate interference; the corresponding (1,1) spreading codes of UE3 and UE7 indicate that two REs of the 13 th and 14 th OFDM symbols on subcarriers 2 and 12 where the pilot is located are spread by (1,1), and two REs of the 6 th and 7 th OFDM symbols on subcarrier 7 where the pilot is located are spread by (1,1), and UE4 and UE8 are similar to UE3 and UE 7. The RE occupied by the non-zero power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the zero power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE3, the UE4, the UE7 and the UE8 do not generate interference on the pilots of the UE1, the UE2, the UE5 and the UE 6; the RE occupied by the zero-power demodulation pilot signals of the UE1, the UE2, the UE5 and the UE6 is the same as the RE occupied by the non-zero-power demodulation pilot signals of the UE3, the UE4, the UE7 and the UE8, so that the UE1, the UE2, the UE5 and the UE6 do not generate interference on the pilots of the UE3, the UE4, the UE7 and the UE 8.

There may also be 6 and 7 users for multiplexing, similar to the method in the first embodiment, and will not be described here again.

In this embodiment, by using the position of the RE occupied by the non-zero-power demodulation pilot signal in at least one candidate demodulation pilot pattern and corresponding to the position of the RE occupied by the zero-power demodulation pilot signal in the remaining at least one candidate demodulation pilot pattern, different demodulation pilot patterns are configured for different first network devices, and interference to other first network devices is avoided, so that the number of multiplexed users can be increased, and the problem that the configuration of the DMRS in the prior art cannot meet the pilot multiplexing of the increased users is solved.

Fig. 13 is a schematic diagram of a candidate demodulation pilot pattern according to a third embodiment of the present invention. On the basis of the first and second method embodiments, in a first implementation manner in this embodiment:

in at least one candidate demodulation pilot frequency pattern, all the nonzero power demodulation pilot frequency signals occupy the same time interval; the time interval is a first time interval.

In at least one candidate demodulation pilot frequency pattern, all zero power demodulation pilot frequency signals occupy the same time interval; the time interval is a first time interval.

Specifically, the at least one candidate demodulation pilot pattern may be the candidate demodulation pilot patterns shown in fig. 3 and 4, where all the non-zero-power demodulation pilot signals occupy the same time slot, and all the zero-power demodulation pilot signals occupy the same time slot, that is, the first time interval may be a time length of the time slot.

Optionally, in the at least one candidate demodulation pilot pattern, frequency bandwidths occupied by non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in the first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

Optionally, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the zero-power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth, the time interval is a second time interval, and the second time interval is a time interval smaller than the first time interval.

Specifically, the candidate demodulation pilot patterns shown in fig. 3 and 4 may be adopted in the above case, where frequency bandwidths (e.g., widths of frequencies of subcarriers) occupied by the non-zero-power demodulation pilot signals or the zero-power demodulation pilot signals in the same time interval (e.g., the time length of the same time slot) are distributed at equal intervals in a first frequency bandwidth, where the first frequency bandwidth may be a width of a frequency of a PRB, that is, the frequency bandwidths are at equal intervals in the PRB, and the intervals are 5 subcarriers, which is not described herein again.

The second time interval is smaller than the first time interval, and the second time interval is, for example, the time length of an OFDM symbol, and the first time interval is, for example, the time length of a unit slot.

In a second implementation manner in this embodiment:

in at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

In at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

Specifically, the at least one candidate demodulation pilot pattern may adopt the candidate demodulation pilot pattern shown in fig. 6, where all subcarriers occupied by non-zero-power demodulation pilot signals are the same, the at least one candidate demodulation pilot pattern may adopt the candidate demodulation pilot pattern shown in fig. 7, where all subcarriers occupied by zero-power demodulation pilot signals are the same, that is, the frequency bandwidth may be the frequency width of the subcarriers; alternatively, as shown in fig. 6 and 7, the non-zero power demodulation pilot signal and the zero power demodulation pilot signal occupy the same frequency width of the PRB pair.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals within the same frequency bandwidth are distributed at equal intervals within a third time interval; the third time interval is a time interval greater than the first time interval.

Specifically, the candidate demodulation pilot patterns shown in fig. 6 and 10 may be adopted in the above case, and the time intervals occupied by the non-zero power demodulation pilot signals or the zero power demodulation pilot signals within the same frequency bandwidth (for example, the frequency width of the subcarriers, the frequency width of the PRB pair) are distributed at equal intervals within a third time interval (for example, the time length of the unit subframe), that is, distributed at equal intervals within the subframe, and the interval is 6 symbols; the third time interval is a time interval that is greater than the first time interval (e.g., the time length of a time slot). And will not be described in detail herein.

The third time interval is, for example, a time length of a unit subframe including a time length of two unit slots, and is larger than the first time interval, for example, a time length of a unit slot.

In a third implementation manner in this embodiment:

in at least one candidate demodulation pilot frequency pattern, the nonzero power demodulation pilot frequency signals occupy different time intervals on the frequency bandwidth where the adjacent demodulation pilot frequency signals are located; the time interval is a first time interval; and/or the presence of a gas in the gas,

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals on frequency bandwidths occupied by adjacent demodulation pilot signals are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

Specifically, the above case may adopt candidate demodulation pilot patterns as shown in fig. 11 and 12, where the time intervals occupied by the non-zero power demodulation pilot signal or the zero power demodulation pilot signal in the frequency bandwidth (for example, the frequency width of the subcarrier) of the adjacent demodulation pilot signals are different; the time interval is a first time interval, such as a time length of a unit time slot; and/or the non-zero power demodulation pilot signals or the zero power demodulation pilot signals occupy different frequency bandwidths (for example, the widths of the frequencies of the subcarriers) in the time interval where the adjacent demodulation pilot signals are located; the time interval is a time length of the first time interval, for example, a unit time slot.

As shown in fig. 11, the REs occupied by the non-zero-power DMRSs are REs (gray REs) at the positions of the 6 th and 7 th OFDM symbols on the 2 nd and 12 th subcarriers, and the REs (gray REs) at the positions of the 13 th and 14 th OFDM symbols on the 7 th subcarrier, that is, the time intervals occupied by the non-zero-power DMRSs on the subcarriers where the adjacent demodulation pilot signals are located, such as the 2 th and 7 th OFDM symbols, are the REs at the positions of the 6 th and 7 th OFDM symbols of the first slot, respectively, and the time intervals occupied by the non-zero-power DMRSs on the subcarriers 7 and 12 at the positions of the 13 th and 14 th OFDM symbols of the second slot, respectively, are the REs at the positions of the 13 th and 14 th OFDM symbols of the second slot, and the REs at the positions of the 6 th and 7 th OFDM symbols of the first slot, respectively; REs occupied by the zero-power DMRS are REs (gray-shaded REs) at the positions of the 6 th and 7 th OFDM symbols on the 7 th subcarrier, and REs (gray-shaded REs) at the positions of the 13 th and 14 th OFDM symbols on the 2 nd and 12 th subcarriers. That is, the time intervals occupied by the zero-power DMRSs on the subcarriers, such as 2 and 7, where the adjacent demodulation pilot signals are located, are the RE at the position of the 13 th OFDM symbol and 14 th OFDM symbol of the second slot, respectively, the RE at the position of the 6 th OFDM symbol and 7 th OFDM symbol of the first slot, and the time intervals occupied by the zero-power DMRSs on the subcarriers 7 and 12 are the RE at the position of the 6 th OFDM symbol and 7 th OFDM symbol of the first slot, respectively, and the RE at the position of the 13 th OFDM symbol and 14 th OFDM symbol of the second slot, respectively, that is, the time intervals on the subcarriers where the adjacent demodulation pilot signals are located are different; or, the subcarriers occupied by the non-zero power DMRS on the adjacent time slots are different, and the subcarriers occupied by the zero power DMRS on the adjacent time slots are different.

Optionally, in the at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the zero-power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the zero-power demodulation pilot signals are distributed at equal intervals.

Specifically, as shown in fig. 13, the candidate demodulation pilot patterns include intervals such as time intervals occupied by the non-zero-power demodulation pilot signal or the zero-power demodulation pilot signal, and intervals such as occupied frequency bandwidths, where the time intervals are, for example, time lengths of unit OFDM symbols, and the frequency bandwidths are, for example, widths of frequencies of unit subcarriers.

The REs occupied by the non-zero-power DMRS are REs (gray REs) at positions of 7 th and 14 th OFDM (from left to right) symbols on the 2 nd, 7 th and 12 th subcarriers (from bottom to top in the figure), and the REs occupied by the zero-power DMRS are REs (gray grid REs) at positions of 6 th and 13 th OFDM symbols on the 2 nd, 7 th and 12 th subcarriers; the OFDM symbols occupied by the non-zero power DMRS and the zero power DMRS are distributed at equal intervals within the time length of a unit subframe, and the interval is 6 OFDM symbols; the subcarriers occupied by the non-zero power DMRS and the zero power DMRS are distributed at equal intervals within the width of the frequency of the PRB, and the interval is 5 subcarriers.

Optionally, the at least two candidate pilot patterns are sent to the first network device through dynamic signaling or higher layer signaling.

Optionally, the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

Optionally, one of the at least two candidate pilot patterns is sent to the first network device through dynamic signaling or higher layer signaling.

Specifically, cell-specific means that pilot patterns sent by network devices to users in the same cell are the same, user-group-specific means that pilot patterns sent by network devices to users in the same user group are the same, and user-specific means that pilot patterns sent by network devices to different users are different.

In a fourth embodiment of the method for configuring a demodulation pilot signal according to the present invention, an execution subject of this embodiment may be a first network device, and the first network device is, for example, a base station, a user equipment, or another network device. The scheme of the embodiment is applied between the second network device and the first network device to perform the configuration of the demodulation pilot signal. The method of the embodiment may include:

Specifically, as shown in fig. 3 and 4, there are two candidate demodulation pilot patterns, the network device determines one of at least two candidate demodulation pilot patterns with the same port number, and maps the demodulation pilot signal onto the demodulation pilot pattern, where the port number is equal to the number of layers of the data stream; the candidate demodulation pilot pattern refers to a demodulation pilot pattern used when the base station allocates a single physical resource block for the first network device to perform channel estimation on the PRB pair. Each candidate demodulation pilot pattern contains a plurality of REs, the gray and gray grid REs are the REs occupied by the demodulation pilot signals, and the RE in the diagonal line part represents the common pilot. The port number refers to the number of logical antenna ports, which is equal to the number of layers of the data stream.

The first network equipment receives the configuration information of the demodulation pilot signal and the demodulation pilot signal mapped on the candidate demodulation pilot pattern by the second network equipment, and the configuration information of the demodulation pilot signal indicates that:

A spreading code; or

At least one of scrambling code information.

Optionally, the at least two candidate demodulation pilot patterns with the same port number are different, including:

Optionally, in at least one candidate demodulation pilot pattern, a time interval occupied by at least one of the non-zero power demodulation pilot signals and a time interval occupied by at least one of the zero power demodulation pilot signals are different, and a frequency bandwidth occupied by the non-zero power demodulation pilot signals and a frequency bandwidth occupied by the zero power demodulation pilot signals are also different.

Optionally, in at least one candidate demodulation pilot pattern, a time interval occupied by all the non-zero power demodulation pilot signals is different from a time interval occupied by all the zero power demodulation pilot signals.

Optionally, in at least one candidate demodulation pilot pattern, a frequency bandwidth occupied by all the non-zero power demodulation pilot signals is different from a frequency bandwidth occupied by all the zero power demodulation pilot signals.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero-power demodulation pilot signal and the zero-power demodulation pilot signal on a frequency bandwidth where an adjacent demodulation pilot signal is located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by all the non-zero power demodulation pilot signals are the same; the time interval is a first time interval.

Optionally, in at least one candidate demodulation pilot pattern, frequency bandwidths occupied by the non-zero power demodulation pilot signals in the same time interval are distributed at equal intervals in a first frequency bandwidth; the time interval is a second time interval, which is a time interval smaller than the first time interval.

Optionally, in at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the non-zero power demodulation pilot signals are the same.

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals on frequency bandwidths where adjacent demodulation pilot signals are located are different; the time interval is a first time interval; and/or the presence of a gas in the gas,

Optionally, in at least one candidate demodulation pilot pattern, time intervals occupied by the non-zero power demodulation pilot signals are distributed at equal intervals, and frequency bandwidths occupied by the non-zero power demodulation pilot signals are distributed at equal intervals.

Optionally, in at least one candidate demodulation pilot pattern, all the zero-power demodulation pilot signals occupy the same time interval; the time interval is a first time interval.

Optionally, in at least one candidate demodulation pilot pattern, the frequency bandwidths occupied by the zero-power demodulation pilot signals are the same.

Optionally, the time interval includes a time length of a unit subframe, a time length of a unit slot, or a time length of a unit orthogonal frequency division multiplexing, OFDM, symbol.

Optionally, the frequency bandwidth includes a width of a frequency of a unit subcarrier or a width of a frequency of a unit physical resource block PRB.

Optionally, the first network device receives the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

Optionally, the first network device is a user equipment, and the second network device is a base station; or the like, or, alternatively,

Specifically, the technical solution of the present invention can be used for transmitting and receiving the demodulation pilot pattern between the network device and the user equipment, and between the network device and the network device. Optionally, the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

Optionally, the first network device receives one of the at least two candidate pilot patterns sent by the second network device through dynamic signaling or higher layer signaling.

In this embodiment, a first network device obtains a demodulation pilot pattern according to received demodulation pilot configuration information, and receives a demodulation pilot signal according to a corresponding demodulation pilot pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream; at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns comprises a physical Resource Element (RE) occupied by a non-zero power demodulation pilot signal and a physical Resource Element (RE) occupied by a zero power demodulation pilot signal, so that different demodulation pilot patterns are configured for different first network devices, and interference on other first network devices is avoided, therefore, the number of multiplexed users can be increased, and the problem that the configuration of a DMRS in the prior art cannot meet the pilot multiplexing of the increased users is solved.

Fig. 14 is a schematic structural diagram of a second network device according to a first embodiment of the present invention. As shown in fig. 14, the second network device 140 provided in this embodiment includes: a mapping module 1401 and a sending module 1402; the mapping module 1401 is configured to determine one of at least two candidate demodulation pilot patterns with the same number of ports, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, where the number of ports is equal to the number of layers of a data stream; wherein the at least two candidate demodulation pilot patterns with the same port number are different, and at least one of the candidate demodulation pilot patterns contains physical Resource Elements (REs) occupied by non-zero power demodulation pilot signals and physical Resource Elements (REs) occupied by zero power demodulation pilot signals;

a sending module 1402, configured to send the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first network device.

the dynamic signaling or higher layer signaling is user specific.

The network device of this embodiment may be configured to execute the technical solutions of any one of the first to third embodiments of the method, and the implementation principles and technical effects thereof are similar and will not be described herein again.

Fig. 15 is a schematic structural diagram of a first network device according to a first embodiment of the present invention. As shown in fig. 15, the first network device 150 provided in this embodiment includes: an acquisition module 1501; the acquisition module 1501 is configured to acquire a demodulation pilot pattern according to the received demodulation pilot configuration information, and receive a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream;

Optionally, the obtaining module 1501 is specifically configured to: and receiving the at least two candidate pilot patterns sent by the second network equipment through dynamic signaling or higher layer signaling.

the dynamic signaling or higher layer signaling is user specific.

Optionally, the obtaining module 1501 is specifically configured to: and receiving one pilot pattern of the at least two candidate pilot patterns sent by the second network equipment through dynamic signaling or higher layer signaling.

The first network device of this embodiment may be configured to execute the technical solution described in the fourth embodiment of the method, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 16 is a schematic structural diagram of a second network device according to a second embodiment of the present invention. As shown in fig. 16, the second network device 160 provided by the present embodiment includes a processor 1601 and a memory 1602. Second network device 160 may also include a transmitter 1603, a receiver 1604. The transmitter 1603 and the receiver 1604 may be coupled to a processor 1601. The transmitter 1603 is configured to transmit data or information, the receiver 1604 is configured to receive data or information, the memory 1602 stores an execution instruction, when the second network device 160 operates, the processor 1601 communicates with the memory 1602, and the processor 1601 invokes the execution instruction in the memory 1602 to execute the technical solution described in any one of the first to third embodiments of the method.

Fig. 17 is a schematic structural diagram of a second network device according to a first embodiment of the present invention. As shown in fig. 17, the first network device 170 provided in the present embodiment includes a processor 1701 and a memory 1702. The first network device 170 may further include a transmitter 1703, a receiver 1704. The transmitter 1703 and receiver 1704 may be coupled to the processor 1701. The transmitter 1703 is configured to transmit data or information, the receiver 1704 is configured to receive the data or information, the memory 1702 stores an execution instruction, when the first network device 170 runs, the processor 1701 communicates with the memory 1702, and the processor 1701 invokes the execution instruction in the memory 1702 to execute the technical solution described in the fourth embodiment of the method.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units or modules is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or modules may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An information transmission method, comprising:

determining a demodulation pilot frequency pattern in at least two candidate demodulation pilot frequency patterns with the same port number, and mapping a demodulation pilot frequency signal to a time frequency resource corresponding to the demodulation pilot frequency pattern, wherein the port number is equal to the layer number of a data stream;

wherein the at least two candidate demodulation pilot patterns with the same port number are different, the demodulation pilot patterns comprise a first physical resource unit and a second physical resource unit,

the first physical resource unit is a physical resource unit occupied by a non-zero power demodulation pilot signal of first user equipment, and the second physical resource unit is a physical resource unit not containing the non-zero power demodulation pilot signal and data of the first user equipment;

and sending the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first user equipment.

2. The method of claim 1, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

the second physical resource unit in the demodulation pilot pattern corresponds to a position of a physical resource unit occupied by a non-zero power demodulation pilot signal of a third user equipment in the rest at least one candidate pilot pattern, and the third user equipment is user equipment different from the first user equipment.

3. The method of claim 1, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

in the demodulation pilot pattern, the positions of all the first physical resource units and the positions of all the second physical resource units correspond to the positions of physical resource units occupied by the non-zero power demodulation pilot signals of the third user equipment in the rest at least one candidate pilot pattern.

4. The method according to claim 1 or 2, wherein the frequency bandwidth occupied by all the first physical resource elements and the frequency bandwidth occupied by all the second physical resource elements in the demodulation pilot pattern are different.

5. The method of claim 4, wherein the demodulation pilot pattern occupies the same time interval for all the first physical resource units; the time interval is a first time interval.

6. The method according to any of claims 1-5, wherein the at least two candidate demodulation pilot patterns are sent to the first user equipment by dynamic signaling or higher layer signaling.

7. The method of claim 6, wherein the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

8. The method according to claim 7, wherein one of the at least two candidate demodulation pilot patterns is sent to the first user equipment through dynamic signaling or higher layer signaling.

9. An information transmission method, comprising:

obtaining a demodulation pilot pattern according to the received demodulation pilot configuration information, and receiving a demodulation pilot signal according to the corresponding demodulation pilot pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream;

the at least two candidate demodulation pilot patterns with the same port number are different, each demodulation pilot pattern includes a first physical resource unit and a second physical resource unit, the first physical resource unit is a physical resource unit occupied by a non-zero power demodulation pilot signal of the first user equipment, and the second physical resource unit is a physical resource unit not containing the non-zero power demodulation pilot signal and data of the first user equipment.

10. The method of claim 9, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

11. The method of claim 9, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

in the demodulation pilot pattern, the positions occupied by all the first physical resource units and the positions occupied by all the second physical resource units correspond to the positions of the physical resource units occupied by the non-zero power demodulation pilot signals of the third user equipment in the rest at least one candidate pilot pattern.

12. The method according to claim 9 or 10, wherein the frequency bandwidth occupied by all the first physical resource elements in the demodulation pilot pattern is different from the frequency bandwidth occupied by all the second physical resource elements.

13. The method of claim 12, wherein the demodulation pilot pattern occupies the same time interval for all the first physical resource units; the time interval is a first time interval.

14. The method according to any of claims 9-13, wherein said first user equipment receives said at least two candidate demodulation pilot patterns transmitted by dynamic signaling or higher layer signaling.

15. The method of claim 14, wherein the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

16. The method of claim 15, wherein the first user equipment receives one of the at least two candidate demodulation pilot patterns transmitted by dynamic signaling or higher layer signaling.

17. An information transmission apparatus, comprising:

a processor, configured to determine a demodulation pilot pattern from at least two candidate demodulation pilot patterns with the same port number, and map a demodulation pilot signal to a time-frequency resource corresponding to the demodulation pilot pattern, where the port number is equal to the number of layers of a data stream;

a transmitter, configured to send the mapped demodulation pilot signal and the configuration information of the demodulation pilot signal to the first user equipment.

18. The apparatus of claim 17, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

19. The apparatus of claim 17, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

in the demodulation pilot frequency pattern, the positions of all the first physical resource units and the positions of all the second physical resource units correspond to the positions of physical resource units occupied by the non-zero power demodulation pilot frequency signals of the third user equipment in the rest at least one candidate pilot frequency pattern.

20. The apparatus according to claim 17 or 18, wherein the demodulation pilot pattern comprises a frequency bandwidth occupied by all of the first physical resource elements and a frequency bandwidth occupied by all of the second physical resource elements that are different.

21. The apparatus of claim 20, wherein the demodulation pilot pattern occupies the same time interval for all the first physical resource units; the time interval is a first time interval.

22. The apparatus according to any of claims 17-21, wherein the at least two candidate demodulation pilot patterns are signaled to the first user equipment via dynamic signaling or higher layer signaling.

23. The apparatus of claim 22, wherein the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

24. The apparatus of claim 23, wherein one of the at least two candidate demodulation pilot patterns is sent to the first user equipment through dynamic signaling or higher layer signaling.

25. An information transmission apparatus, comprising:

the processor is used for obtaining a demodulation pilot frequency pattern according to the received demodulation pilot frequency configuration information and receiving a demodulation pilot frequency signal according to the corresponding demodulation pilot frequency pattern; the demodulation pilot pattern is one of at least two candidate demodulation pilot patterns with the same port number, and the port number is equal to the layer number of the data stream;

26. The apparatus of claim 25, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

27. The apparatus of claim 25, wherein the at least two candidate demodulation pilot patterns with the same port number are different, comprising:

in the demodulation pilot pattern, the positions occupied by all the first physical resource units and the positions occupied by all the second physical resource units correspond to the positions occupied by the non-zero power demodulation pilot signals of the third user equipment in the rest at least one candidate pilot pattern.

28. The apparatus according to claim 25 or 26, wherein the demodulation pilot pattern comprises a frequency bandwidth occupied by all of the first physical resource elements different from a frequency bandwidth occupied by all of the second physical resource elements.

29. The apparatus of claim 28, wherein the demodulation pilot pattern occupies the same time interval for all the first physical resource units; the time interval is a first time interval.

30. The apparatus according to any one of claims 25 to 29, wherein the obtaining module is specifically configured to: receiving the at least two candidate demodulation pilot patterns transmitted through dynamic signaling or higher layer signaling.

31. The apparatus of claim 30, wherein the dynamic signaling or higher layer signaling is cell-specific; or the like, or, alternatively,

the dynamic signaling or higher layer signaling is user specific.

32. The apparatus of claim 31, wherein the obtaining module is specifically configured to: receiving one of the at least two candidate demodulation pilot patterns transmitted through dynamic signaling or higher layer signaling.

33. A communications apparatus, comprising:

a processor and a memory, the memory storing execution instructions that, when the communication device is operating, communicate between the processor and the memory, the execution of the execution instructions by the processor causing the communication device to perform the method of any of claims 1-8.

34. A communications apparatus, comprising:

a processor and a memory, the memory storing execution instructions that, when the communication device is operating, communicate between the processor and the memory, execution of the execution instructions by the processor causing the communication device to perform the method of any of claims 9-16.

35. A computer-readable storage medium, wherein a computer program is stored on the readable storage medium; the computer program when executed implements a method as claimed in any one of claims 1 to 8 or 9 to 16.