CN103986507B - A kind of method for sending information and a kind of RRH - Google Patents
A kind of method for sending information and a kind of RRH Download PDFInfo
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Abstract
The invention discloses a kind of method for sending information and a kind of RRH, to reduce interfering for the signal between the antenna port of the adjacent RRH in position same mark.A kind of method for sending information provided by the invention, including：Local RRH determines to need the information sent to user equipment (UE) by the way of diversity transmission；Antenna ports or antenna port pair of the local RRH corresponding to by the way of the diversity transmission, described information is sent to the UE；Wherein, for RRH adjacent with position local RRH when described information is sent to the UE by the way of diversity transmission, used antenna port or antenna port are to difference.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an information sending method and an RRH.
Background
One networking mode of Long Term Evolution (LTE) is to distribute multiple Remote Radio Heads (RRHs) in a single cell, as shown in fig. 1. One typical application of this networking approach is in high speed scenarios. For example, a plurality of RRHs are arranged along a high-speed railway, and the RRHs belong to the same cell, so as to avoid the consumption caused by frequent cell switching of User Equipment (UE).
In the above scenario, the UE receives information as a superposition of information transmitted by multiple RRHs, and each RRH transmits information with different doppler shifts with respect to a specific UE location and motion direction, as shown in fig. 2. Assuming Line of sight (LOS) reception, ignoring the effect of the far-end RRH, the UE receives doppler shift of information, as shown in fig. 3, i.e. the UE receives information as a superposition of two frequency shift information sent by RRH2 and RRH 3. When the LTE downlink transmission information adopts an Orthogonal Frequency Division Multiplexing (OFDM) modulation scheme, the existing LTE downlink transmission scheme (for example, a cell is configured with two antenna ports) is as follows:
the first scheme is as follows:
each RRH uses antenna port 0 and antenna port 1 to transmit information of a Physical hybrid ARQ Indicator Channel (PHICH), a Physical Broadcast Channel (PBCH), a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), and a Reference Signal (RS).
Each RRH is fixed and adopts antenna port 0 or antenna port 1 to transmit synchronization information (SS); or each RRH rotates to adopt the antenna port 0 or the antenna port 1 to transmit the SS.
Scheme II:
each RRH transmits PHICH, PBCH, PCFICH, PDCCH, and Cell-specific Reference Signal (CRS) information using antenna port 0 and antenna port 1.
Each RRH is fixed and adopts an antenna port 0 or an antenna port 1 to send SS; or each RRH rotates to adopt the antenna port 0 or the antenna port 1 to transmit the SS.
Each RRH transmits a PDSCH through an antenna port 5 or an antenna port 7 and/or an antenna port 8, and transmits information of a corresponding UE-specific reference signal (UEs-specific rs, URS) in a Physical Resource Block (PRB) occupied by the PDSCH.
The above scheme has the disadvantage that the information received by the same UE is the superposition of multiple RRH transmission information, which may cause the degradation of the UE reception performance when the information transmitted by the RRH has different doppler shifts. Because the information of the channels such as PDCCH, PBCH and the like and CRS must be transmitted by antenna port 0 and antenna port 1 under the condition that two antenna ports are configured in the cell, it is ensured that the UE in all cells can receive the information. However, with the existing antenna port configuration, as shown in fig. 4, all RRHs configure antenna port 0 and antenna port 1. Due to different doppler shifts, mutual interference may occur between the information of the antenna port 0 configured by RRH2 and the information of the antenna port 0 configured by RRH 3. Similarly, the information of the antenna port 1 configured by the RRH2 and the information of the antenna port 1 configured by the RRH3 may interfere with each other. These interferences will inevitably degrade the reception performance of the channel information such as PDCCH, PBCH, etc. by the same UE.
Disclosure of Invention
The embodiment of the invention provides an information sending method and an RRH (remote radio head), which are used for reducing mutual interference of signals between antenna ports of the same identifier of RRHs adjacent to each other in position.
The information sending method provided by the embodiment of the invention comprises the following steps:
a local Remote Radio Head (RRH) determines information to be sent to User Equipment (UE) in a diversity transmission mode;
the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
and when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different.
According to the information sending method provided by the invention, when the information which needs to be sent to the UE in a diversity transmission mode is sent, because the antenna ports or the antenna port pairs which are adopted when the RRHs adjacent to the position send the information to the UE are different, the signals between the antenna ports of the same identification of the adjacent RRHs can not generate mutual interference, so that the mutual interference of the signals between the antenna ports of the same identification of the RRHs adjacent to the position is reduced.
Preferably, the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information. Of course, when it is determined that a certain antenna port or antenna port pair is used to transmit the information, information of the cell-specific reference signal CRS needs to be transmitted on the determined antenna port or antenna port pair.
Preferably, the method further comprises:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
Preferably, if the cell is configured with 2 antenna ports, when the local RRH transmits the information to the UE in a diversity transmission manner, the antenna port used is antenna port 0; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 0.
Preferably, if 4 antenna ports are configured for the cell, the UE may send the information using an antenna port pair, where the antenna port pair includes: an antenna port pair consisting of antenna port 0 and antenna port 2, and an antenna port pair consisting of antenna port 1 and antenna port 3. In this case, when the local RRH transmits the information to the UE in a diversity transmission manner, the antenna port pair used includes antenna port 0 and antenna port 2; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2.
An RRH provided in an embodiment of the present invention includes:
an information determination unit configured to: the local RRH determines information which needs to be sent to User Equipment (UE) in a diversity transmission mode;
an information sending unit configured to: the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
and when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different.
When the RRH provided by the embodiment of the present invention sends information to be sent to the UE in a diversity transmission manner, because the adjacent RRHs in the position send information to the UE through different antenna ports or antenna port pairs, signals between the antenna ports of the same identifier of the adjacent RRHs will not interfere with each other, thereby reducing the mutual interference of signals between the antenna ports of the same identifier of the adjacent RRHs in the position.
Preferably, the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information.
Preferably, the information sending unit is further configured to:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
Preferably, if 2 antenna ports are configured in the cell, when the antenna port used by the RRH adjacent to the local RRH to send the information to the UE in the diversity transmission manner is antenna port 1, the antenna port used by the information sending unit is antenna port 0 when the local RRH sends the information to the UE in the diversity transmission manner; or,
when the antenna port used by the RRH adjacent to the local RRH position to send the information to the UE in the diversity transmission mode is antenna port 0, the information sending unit uses antenna port 1 when the local RRH sends the information to the UE in the diversity transmission mode.
Preferably, if 4 antenna ports are configured for the cell, the UE may send the information using an antenna port pair, where the antenna port pair includes: an antenna port pair consisting of antenna port 0 and antenna port 2, and an antenna port pair consisting of antenna port 1 and antenna port 3. In this case, when the pair of antenna ports used when the RRHs adjacent to the local RRH location transmit the information to the UE in a diversity transmission manner includes antenna port 1 and antenna port 3; when the information sending unit sends the information to the UE by using a diversity transmission manner at the local RRH, the antenna port pair used includes antenna port 0 and antenna port 2, or,
when the RRH adjacent to the local RRH position sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2, and when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3.
Drawings
Fig. 1 is a schematic diagram of distributing multiple RRHs within a single cell;
fig. 2 is a diagram illustrating different RRHs sending information to a UE in motion;
fig. 3 is a schematic diagram of frequency point positions of doppler shift signals when different RRHs transmit information to a moving UE in the prior art;
fig. 4 is a schematic diagram illustrating that neighboring RRHs in position use the same identified antenna port to send information to a moving UE in the prior art;
fig. 5 is a schematic diagram illustrating that neighboring RRHs transmit information to a moving UE through antenna ports with different identifiers according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an RRH according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an information sending method and RRHs, which are used for reducing mutual interference of signals between antenna ports of the same identifier of RRHs adjacent to each other in position.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The information sending method provided by the embodiment of the invention comprises the following steps:
a local Remote Radio Head (RRH) determines information to be sent to User Equipment (UE) in a diversity transmission mode;
the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
and when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different. That is, the antenna port used when the local RRH transmits the information to the UE in a diversity transmission manner is different from the antenna port used when the RRH adjacent to the local RRH transmits the information to the UE in a diversity transmission manner; or, the antenna port pair used when the local RRH transmits the information to the UE in a diversity transmission manner is different from the antenna port pair used when the RRH adjacent to the local RRH transmits the information to the UE in a diversity transmission manner.
According to the information sending method provided by the invention, when the information which needs to be sent to the UE in a diversity transmission mode is sent, because the antenna ports or the antenna port pairs which are adopted when the RRHs adjacent to the position send the information to the UE are different, the signals between the antenna ports of the same identification of the adjacent RRHs can not generate mutual interference, so that the mutual interference of the signals between the antenna ports of the same identification of the RRHs adjacent to the position is reduced.
Preferably, the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information. Of course, when it is determined that a certain antenna port or antenna port pair is used to transmit the information, information of the cell-specific reference signal CRS needs to be transmitted on the determined antenna port or antenna port pair.
Preferably, the method further comprises:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
Preferably, if the cell is configured with 2 antenna ports, when the local RRH transmits the information to the UE in a diversity transmission manner, the antenna port used is antenna port 0; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 0.
Preferably, if 4 antenna ports are configured for the cell, the UE may send the information using an antenna port pair, where the antenna port pair includes: an antenna port pair consisting of antenna port 0 and antenna port 2, and an antenna port pair consisting of antenna port 1 and antenna port 3. In this case, when the local RRH transmits the information to the UE in a diversity transmission manner, the antenna port pair used includes antenna port 0 and antenna port 2; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2.
Preferably, if the cell configures 4 antenna ports, that is, the RRH configures antenna port 0, antenna port 1, antenna port 2 and antenna port 3. When the local RRH sends the information to the UE in a diversity transmission mode, the used antenna ports are antenna port 0, antenna port 1, antenna port 2 or antenna port 3; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is different from the antenna port used by the local RRH. For example, assuming there are multiple RRHs, RRH1, RRH2, RRH3, RRH4 … … RRH n, respectively, RRH1 uses antenna port 0, RRH2 uses antenna port 1, RRH3 uses antenna port 2, RRH4 uses antenna port 3, and so on, when transmitting the information to the UE.
Specific embodiments are given below to describe in detail the information sending method provided by the embodiments of the present invention.
Example one
The following description will take an example in which a cell is configured with two antenna ports.
The information sending method provided by the first embodiment of the invention comprises the following steps:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
step two, the local RRH uses an antenna port 0 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port 1 to send the information to the UE; or,
and the local RRH uses an antenna port 1 to send the information to the UE, and an RRH adjacent to the position of the local RRH uses an antenna port 0 to send the information to the UE.
In a specific implementation process, in the first step of this embodiment, the information that the local RRH needs to send to the UE in a diversity transmission manner is determined to include a combination of one or more of the following information: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information. Of course, when it is determined that a certain antenna port or antenna port pair is used to transmit the information, information of the cell-specific reference signal CRS needs to be transmitted on the determined antenna port or antenna port pair. The following examples are the same and will not be described in detail.
In step two of the first embodiment, for example, assuming that there are a plurality of RRHs, RRH1, RRH2, RRH3, RRH4 … … RRH n, when transmitting the information determined in step one to the UE:
as shown in fig. 5, RRH1 uses antenna port 1, RRH2 uses antenna port 0, RRH3 uses antenna port 1, RRH4 uses antenna port 0, and so on. That is, RRH2i +1 uses antenna port 1, RRH2i +2 uses antenna port 0, where i is 0, 1, 2 … … N;
alternatively, RRH1 uses antenna port 0, RRH2 uses antenna port 1, RRH3 uses antenna port 0, RRH4 uses antenna port 1, and so on. That is, RRH2i +1 uses antenna port 0 and RRH2i +2 uses antenna port 1, where i is 0, 1, 2 … … N.
In this embodiment, the RRH transmits a combination of one or more of the following information to the UE in a diversity transmission manner: the information of a physical hybrid ARQ indicator channel PHICH, the information of a physical broadcast channel PBCH, the information of a physical control format indicator channel PCFICH, the information of a physical downlink control channel PDCCH, and the information of a physical downlink shared channel PDSCH including system information and paging information can ensure that UE in all cells can receive the information. Meanwhile, when the RRHs adjacent to the positions use the antenna ports with different identifications to send the information, for the antenna ports with the same identification, the signals of the RRHs adjacent to the positions are not superposed any more, and then interference can not be generated, so that mutual interference of the signals between the antenna ports with the same identification of the RRHs adjacent to the positions is reduced, and further the receiving performance of the UE on the information is improved.
Example two
The following description will also be given taking the configuration of two antenna ports as an example.
The information sending method provided by the second embodiment of the invention comprises the following steps:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
step two, the local RRH uses an antenna port 0 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port 1 to send the information to the UE; or,
and the local RRH uses an antenna port 1 to send the information to the UE, and an RRH adjacent to the position of the local RRH uses an antenna port 0 to send the information to the UE.
The first step of the information sending method provided in the second embodiment is the same as that in the first embodiment, and is not described herein again.
If the information on the PDSCH includes information on a specific UE, the method further includes, in step two:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
In a specific implementation process, when the transmission mode 7 is adopted to send the information of the physical downlink shared channel PDSCH for the UE to the UE, the antenna port 5 is used to send the information of the physical downlink shared channel PDSCH for the UE to the UE; when the transmission mode 8 is adopted to send the information of the physical downlink shared channel PDSCH for the UE to the UE, the antenna port 7 and/or the antenna port 8 are/is used to send the information of the physical downlink shared channel PDSCH for the UE to the UE. It should be noted that, by using the transmission mode 7 or 8, information of a physical downlink shared channel PDSCH for the UE is sent to the UE, and a UE-specific reference signal URS is sent on a physical resource block PRB occupied by the PDSCH.
In the second embodiment, the RRH transmits a combination of one or more of the following information to the UE in a diversity transmission manner: the information of a physical hybrid ARQ indicator channel PHICH, the information of a physical broadcast channel PBCH, the information of a physical control format indicator channel PCFICH, the information of a physical downlink control channel PDCCH, and the information of a physical downlink shared channel PDSCH including system information and paging information can ensure that UE in all cells can receive the information. Meanwhile, when the RRHs adjacent to the positions use the antenna ports with different identifications to send the information, for the antenna ports with the same identification, the signals of the RRHs adjacent to the positions are not superposed any more, so that interference can not be generated, the mutual interference of the signals between the antenna ports with the same identification of the RRHs adjacent to the positions is reduced, and the receiving performance of the UE on the information is improved; meanwhile, the RRH sends the information of the Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sends a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH, thereby effectively reducing the interference of the received signal of the Physical Downlink Shared Channel (PDSCH).
EXAMPLE III
The following description will take an example in which four antenna ports are configured in a cell.
An information sending method provided by the third embodiment includes:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
step two, the local RRH uses an antenna port formed by an antenna port 0 and an antenna port 2 to send the information to the UE, and an RRH adjacent to the local RRH uses an antenna port formed by an antenna port 1 and an antenna port 3 to send the information to the UE; or,
and the local RRH uses an antenna port formed by an antenna port 1 and an antenna port 3 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port formed by an antenna port 0 and an antenna port 2 to send the information to the UE.
In a specific implementation process, in the first step of this implementation, the information that the local RRH needs to transmit to the UE in a diversity transmission manner is determined to include a combination of one or more of the following information: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information.
In step two of the third embodiment, for example, assuming that there are a plurality of RRHs, RRH1, RRH2, RRH3, RRH4 … … RRH n, when transmitting the information determined in step one to the UE:
RRH1 uses antenna port 1 and antenna port 3, RRH2 uses antenna port 0 and antenna port 2, RRH3 uses antenna port 1 and antenna port 3, RRH4 uses antenna port 0 and antenna port 2, and so on. That is, RRH2i +1 uses antenna port 1 and antenna port 3, and RRH2i +2 uses antenna port 0 and antenna port 2, where i is 0, 1, 2 … … N;
alternatively, RRH1 uses antenna port 0 and antenna port 2, RRH2 uses antenna port 1 and antenna port 3, RRH3 uses antenna port 0 and antenna port 2, RRH4 uses antenna port 1 and antenna port 3, and so on. That is, RRH2i +1 uses antenna port 0 and antenna port 2, and RRH2i +2 uses antenna port 1 and antenna port 3, where i is 0, 1, 2 … … N.
In the third embodiment, the RRH sends information of a physical hybrid ARQ indicator channel PHICH, information of a physical broadcast channel PBCH, information of a physical control format indicator channel PCFICH, information of a physical downlink control channel PDCCH, and information of a physical downlink shared channel PDSCH including system information and paging information to the UE in a diversity transmission manner, so that it can be ensured that the UE in the whole cell can receive the information. Meanwhile, when the RRHs adjacent to the positions use the antenna port pairs with different identifications to send the information, for the antenna port pair with the same identification, the signals of the RRHs adjacent to the positions are not superposed any more, and then interference can not be generated, so that mutual interference of the signals between the antenna ports with the same identification of the RRHs adjacent to the positions is reduced, and further the receiving performance of the UE on the information is improved.
Example four
The following description also takes the case where four antenna ports are allocated to a cell as an example.
The information sending method provided by the fourth embodiment of the invention comprises the following steps:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
step two, the local RRH uses an antenna port formed by an antenna port 0 and an antenna port 2 to send the information to the UE, and an RRH adjacent to the local RRH uses an antenna port formed by an antenna port 1 and an antenna port 3 to send the information to the UE; or,
and the local RRH uses an antenna port formed by an antenna port 1 and an antenna port 3 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port formed by an antenna port 0 and an antenna port 2 to send the information to the UE.
In the information sending method provided in the fourth embodiment, in the step one, the same as that in the embodiment is performed, and details are not repeated here. If the information on the PDSCH includes information on a specific UE, the method further includes, in step two:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
In the fourth embodiment, the RRH sends information of a physical hybrid ARQ indicator channel PHICH, information of a physical broadcast channel PBCH, information of a physical control format indicator channel PCFICH, information of a physical downlink control channel PDCCH, and information of a physical downlink shared channel PDSCH including system information and paging information to the UE in a diversity transmission manner, so that it can be ensured that the UE in the whole cell can receive the information. Meanwhile, when the RRHs adjacent to the positions use different antenna port pairs to send the information, for the antenna port pair with the same identification, the signals of the RRHs adjacent to the positions are not superposed any more, so that interference can not be generated, the mutual interference of the signals between the antenna ports with the same identification of the RRHs adjacent to the positions is reduced, and the receiving performance of the UE on the information is improved; meanwhile, the RRH sends the information of the Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sends a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH, thereby effectively reducing the interference of the received signal of the Physical Downlink Shared Channel (PDSCH).
EXAMPLE five
The following description also takes the case where four antenna ports are allocated to a cell as an example.
The information sending method provided by the fifth embodiment includes:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
and step two, the local RRH uses an antenna port 0, an antenna port 1, an antenna port 2 or an antenna port 3 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port different from the local RRH to send the information to the UE.
In a specific implementation process, in the first step of this embodiment, determining information that the local RRH needs to transmit to the user equipment UE in a diversity transmission manner includes: a physical hybrid ARQ indicator channel PHICH, a physical broadcast channel PBCH, a physical control format indicator channel PCFICH, a physical downlink control channel PDCCH, and/or information of a physical downlink shared channel PDSCH including system information and paging information.
In step two of the fifth embodiment, for example, assuming that there are a plurality of RRHs, RRH1, RRH2, RRH3, RRH4 … … RRH n, when transmitting the information determined in step one to the UE:
RRH1 uses antenna port 0, RRH2 uses antenna port 1, RRH3 uses antenna port 2, RRH4 uses antenna port 3, and so on. That is, RRH4i +1 uses antenna port 1, RRH4i +2 uses antenna port 0, RRH4i +3 uses antenna port 0, and RRH4i +4 uses antenna port 1, where i is 0, 1, 2 … … N.
Of course, in the specific implementation process, the specific antenna port used by each RRH is not limited, and it is only necessary to ensure that the antenna ports used by adjacent RRHs are different. For example, the following may also be employed: RRH1 uses antenna port 0, RRH2 uses antenna port 2, RRH3 uses antenna port 1, RRH4 uses antenna port 3.
EXAMPLE six
The following description also takes the case where four antenna ports are allocated to a cell as an example.
The information sending method provided by the sixth embodiment includes:
step one, a RRH determines information needing to be sent to user equipment UE in a diversity transmission mode;
and step two, the local RRH uses an antenna port 0, an antenna port 1, an antenna port 2 or an antenna port 3 to send the information to the UE, and the RRH adjacent to the local RRH uses an antenna port different from the local RRH to send the information to the UE.
In the information sending method provided in the sixth embodiment, in the step one, the same as that in the fifth embodiment is performed, and details are not described here. If the information on the PDSCH includes information on a specific UE, the method further includes, in step two:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
The information sending method provided by the embodiment of the present invention is described in detail above, and details of the remote radio head RRH provided by the embodiment of the present invention are described below with reference to the accompanying drawings.
As shown in fig. 6, an RRH provided in an embodiment of the present invention includes:
an information determination unit 601, configured to: the local RRH determines information which needs to be sent to User Equipment (UE) by the local RRH in a diversity transmission mode;
an information sending unit 602, configured to: the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
and when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different. That is, the antenna port used by the local RRH for transmitting the information to the UE in the diversity transmission manner is different from the antenna port used by the RRH adjacent to the local RRH for transmitting the information to the UE in the diversity transmission manner; or, the local RRH uses a different antenna port pair when transmitting the information to the UE in a diversity transmission manner, and the RRHs adjacent to the local RRH use a different antenna port pair when transmitting the information to the UE in a diversity transmission manner.
When the RRH provided by the embodiment of the present invention sends information to be sent to the UE in a diversity transmission manner, because the adjacent RRHs in the position send information to the UE through different antenna ports or antenna port pairs, signals between the antenna ports of the same identifier of the adjacent RRHs in the position will not interfere with each other.
Preferably, the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information.
Preferably, the information sending unit 602 is further configured to:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
Preferably, if 2 antenna ports are configured in the cell, when the antenna port used by the RRH adjacent to the local RRH to send the information to the UE in the diversity transmission manner is antenna port 1, the antenna port used by the information sending unit is antenna port 0 when the local RRH sends the information to the UE in the diversity transmission manner; or,
when the antenna port used by the RRH adjacent to the local RRH position to send the information to the UE in the diversity transmission mode is antenna port 0, the information sending unit uses antenna port 1 when the local RRH sends the information to the UE in the diversity transmission mode.
Preferably, if 4 antenna ports are configured for the cell, the UE may send the information using an antenna port pair, where the antenna port pair includes: an antenna port pair consisting of antenna port 0 and antenna port 2, and an antenna port pair consisting of antenna port 1 and antenna port 3. In this case, when the pair of antenna ports used when the RRHs adjacent to the local RRH location transmit the information to the UE in a diversity transmission manner includes antenna port 1 and antenna port 3; when the information sending unit sends the information to the UE by using a diversity transmission manner at the local RRH, the antenna port pair used includes antenna port 0 and antenna port 2, or,
when the RRH adjacent to the local RRH position sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2, and when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3.
Preferably, the information determining unit 601 may be a physical device such as a processor, and the information sending unit 602 may be a physical device such as a transmitter.
In summary, when the information sending method and the RRH provided in the embodiments of the present invention send information that needs to be sent to the UE in a diversity transmission manner, because the antenna ports or antenna port pairs used by the adjacent RRHs to send information to the UE are different, signals between the antenna ports or antenna port pairs of the same identifier of the adjacent RRHs will not interfere with each other, so that the mutual interference of signals between the antenna ports of the same identifier of the adjacent RRHs is reduced, and the receiving performance of the UE on the information is improved.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An information sending method, characterized in that the method comprises:
a local Remote Radio Head (RRH) determines information to be sent to User Equipment (UE) in a diversity transmission mode;
the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different;
the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information.
2. The method of claim 1, further comprising:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
3. The method according to claim 1 or 2, wherein when the local RRH transmits the information to the UE by using diversity transmission, the antenna port used is antenna port 0; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 1; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port is an antenna port 0.
4. The method of claim 1 or 2, wherein when the local RRH transmits the information to the UE in a diversity transmission manner, the antenna port pair used comprises antenna port 0 and antenna port 2; when an RRH adjacent to the position of a local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; or,
when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3; and when the RRH adjacent to the position of the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2.
5. A remote radio head RRH, comprising:
an information determination unit configured to: the local RRH determines information which needs to be sent to User Equipment (UE) in a diversity transmission mode;
an information sending unit configured to: the local RRH sends the information to the UE by adopting an antenna port or an antenna port pair corresponding to a diversity transmission mode;
when the local RRH and the RRH adjacent to the local RRH adopt a diversity transmission mode to send the information to the UE, the used antenna ports or antenna port pairs are different;
the information comprises a combination of one or more of the following: the physical hybrid ARQ indicator channel (PHICH) information, the Physical Broadcast Channel (PBCH) information, the Physical Control Format Indicator Channel (PCFICH) information, the Physical Downlink Control Channel (PDCCH) information, and the Physical Downlink Shared Channel (PDSCH) information including system information and paging information.
6. The RRH of claim 5, wherein the information sending unit is further configured to:
and sending information of a Physical Downlink Shared Channel (PDSCH) aiming at the UE to the UE by adopting a transmission mode 7 or a transmission mode 8, and sending a UE specific reference signal (URS) on a Physical Resource Block (PRB) occupied by the PDSCH.
7. The RRH of claim 5 or 6, wherein when the antenna port used by the RRH adjacent to the local RRH position to transmit the information to the UE in diversity transmission is antenna port 1, the antenna port used by the information transmitting unit when the local RRH transmits the information to the UE in diversity transmission is antenna port 0; or,
when the antenna port used by the RRH adjacent to the local RRH position to send the information to the UE in the diversity transmission mode is antenna port 0, the information sending unit uses antenna port 1 when the local RRH sends the information to the UE in the diversity transmission mode.
8. The RRH of claim 5 or 6, wherein the antenna port pair used when RRH adjacent to the local RRH position transmit said information to said UE in diversity transmission comprises antenna port 1 and antenna port 3; when the information sending unit sends the information to the UE by using a diversity transmission manner at the local RRH, the antenna port pair used includes antenna port 0 and antenna port 2, or,
when the RRH adjacent to the local RRH position sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 0 and an antenna port 2, and when the local RRH sends the information to the UE in a diversity transmission mode, the used antenna port pair comprises an antenna port 1 and an antenna port 3.
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| CN101764632A (en) * | 2008-12-23 | 2010-06-30 | 中兴通讯股份有限公司 | Mapping method and device of ports and antennae in long term evolution-time division duplex (LTE-TDD) indoor distribution system |
| CN102655677A (en) * | 2011-03-02 | 2012-09-05 | 株式会社日立制作所 | Mobile communication system and far-end radio frequency unit clustering method thereof |
| WO2012144866A2 (en) * | 2011-04-20 | 2012-10-26 | Pantech Co., Ltd. | Method and apparatus for transmitting and receiving channel state information in wireless communication system |
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| EP2101541A1 (en) * | 2008-03-14 | 2009-09-16 | Vodafone Group PLC | Radio head for roads or rurual environments |
| CN101764632A (en) * | 2008-12-23 | 2010-06-30 | 中兴通讯股份有限公司 | Mapping method and device of ports and antennae in long term evolution-time division duplex (LTE-TDD) indoor distribution system |
| CN102655677A (en) * | 2011-03-02 | 2012-09-05 | 株式会社日立制作所 | Mobile communication system and far-end radio frequency unit clustering method thereof |
| WO2012144866A2 (en) * | 2011-04-20 | 2012-10-26 | Pantech Co., Ltd. | Method and apparatus for transmitting and receiving channel state information in wireless communication system |
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