CN103891371B

CN103891371B - A kind of method, serving BS and user equipment for configuring pilot signal

Info

Publication number: CN103891371B
Application number: CN201280001572.0A
Authority: CN
Inventors: 吴作敏; 治欣慰; 杨建兵; 夏亮; 刘江华; 大卫·马瑞泽
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-08-13
Filing date: 2012-08-13
Publication date: 2018-04-20
Anticipated expiration: 2032-08-13
Also published as: CN103891371A; WO2014026320A1

Abstract

The present invention provides a kind of method, serving BS and user equipment for configuring pilot signal.This method includes a serving BS and configures at least two channel state information reference signals CSI RS resources for a user equipment (UE), and notifies that at least two CSI RS resources are configured by the serving BS described in the UE；The serving BS sends demodulated reference signal DMRS to the UE, and notifies that DMRS is configured by the serving BS described in the UE.It is not accurate enough that the embodiment of the present invention can solve the problems, such as that above-mentioned three kinds of pilot signals are not from existing Time and Frequency Synchronization during same website.

Description

Method for configuring pilot signal, serving base station and user equipment

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a method for configuring a pilot signal, a serving base station, and a user equipment.

Background

In an Advanced Long Term Evolution (LTE-a) system, an enhanced base station (eNB) may configure a Common Reference Signal (CRS), and/or a Demodulation Reference Signal (DMRS), and/or a Channel-State Information Reference Signal (CSI-RS) and other pilot signals to a User Equipment (User Equipment, UE), where the eNB may also be referred to as a User Demodulation Reference Signal (UE-Specific Reference Signal). Generally, after completing synchronization and cell search, the UE receives a CRS sequence transmitted by a serving cell, and completes time and/or frequency synchronization (hereinafter, referred to as time-frequency synchronization) between the UE and the serving cell through the CRS sequence. And meanwhile, the UE completes the CSI related measurement according to the CRS sequence or the CSI-RS sequence configured by the eNB and reports the CSI to the eNB. When the eNB schedules resources of the UE, the eNB refers to measurement information reported by the UE, and schedules a Physical Downlink Shared Channel (PDSCH) to the UE in a certain transmission mode, and after detecting that a Downlink data packet exists, the UE demodulates the PDSCH according to a CRS sequence or a DMRS sequence.

When the eNB configures three pilot signals including the CRS, the CSI-RS and the DMRS for the UE, the UE completes CSI related measurement according to the CSI-RS, completes PDSCH demodulation according to the DMRS, and if the three pilot signals come from the same eNB, the UE can be accurately synchronized to the eNB according to a CRS sequence. However, in a Coordinated multi-Point transmission/reception (CoMP) scenario composed of a macro base station and a Radio Remote unit (RRH), it is possible that both the macro base station and the RRH have the same Cell number (Cell ID). In this scenario, the macro base station must transmit the CRS sequence, and the RRH may or may not transmit the CRS sequence, so the CRS sequence received by the UE is from the macro base station, or is a superimposed sequence of the CRS sequences transmitted by the macro base station and the RRH. When the serving base station of the UE is a certain RRH, that is, the RRH transmits the DMRS and the PDSCH to the UE, if the UE still uses the received CRS for time-frequency synchronization, the UE may synchronize to the macro base station or the station corresponding to the superimposed sequence, and may not accurately track the RRH serving the UE, which may cause the demodulation performance of the UE to be poor.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method for configuring a pilot signal, a serving base station, and a user equipment, so as to solve the problem that time-frequency synchronization is not accurate enough when the three types of pilot signals are not from the same base station.

In a first aspect, a method for configuring a pilot signal is provided, including:

a serving base station configures at least two CSI-RS resources for a User Equipment (UE), and informs the UE that the at least two CSI-RS resources are configured by the serving base station;

the serving base station transmits a demodulation reference signal (DMRS) to the UE, and notifies the UE that the DMRS is configured by the serving base station.

In a first possible implementation form of the first aspect,

at least two of the at least two CSI-RS resources are mapped to different Orthogonal Frequency Division Multiplexing (OFDM) symbols; or,

the subframe indicated by the subframe configuration information included in the at least two CSI-RS resources is one subframe or two subframes.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the notifying the UE that the at least two CSI-RS resources are configured by the serving base station includes:

sending a first Radio Resource Control (RRC) signaling to the UE, wherein the first RRC signaling comprises:

a CSI-RS configuration information element, the CSI-RS configuration information element including the at least two CSI-RS resources, so that the UE determines the CSI-RS resources included in the first RRC signaling as being configured by the serving base station; or,

at least two CSI-RS configuration information elements, each of the at least two CSI-RS configuration information elements including one of the at least two CSI-RS resources and first indication information, and the first indication information in the at least two CSI-RS configuration information elements being the same, so that the UE determines the at least two CSI-RS resources as being configured by the serving base station according to the same first indication information; or,

a CSI-RS configuration information unit, the CSI-RS configuration information unit including a first CSI-RS resource and at least one first pairing information, each of the at least one first pairing information being used to indicate time-frequency resource location information of a second CSI-RS resource within one physical resource block PRB, or each of the at least one first pairing information being used to indicate time-frequency resource location information of a second CSI-RS resource relative to the first CSI-RS resource, so that the UE determines that the first CSI-RS resource and the second CSI-RS resource indicated by the first pairing information are configured by the serving base station, the first CSI-RS resource being any one of the at least two CSI-RS resources, and the second CSI-RS resource being a different one of the at least two CSI-RS resources from the first CSI-RS resource The first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except for time-frequency resource location information.

With reference to the first aspect or any one of the possible implementations of the first aspect, in a third possible implementation, the notifying the UE that the DMRS is configured by the serving base station includes:

notifying the UE that the DMRS is configured by the serving base station by transmitting first Downlink Control Information (DCI) signaling to the UE, wherein the first DCI signaling includes second indication information indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station; or

Notifying the UE that the DMRS is configured by the serving base station by transmitting first RRC signaling to the UE, wherein the first RRC signaling includes second indication information indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station; or

Notifying the UE that the DMRS is configured by the serving base station by transmitting second RRC signaling to the UE, wherein the second RRC signaling includes second indication information indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner, before the notifying the UE that the at least two CSI-RS resources are configured by the serving base station, the method further includes: sending RRC signaling to the UE, wherein the RRC signaling comprises a first CSI-RS resource which is any one of the at least two CSI-RS resources;

the informing the UE that the at least two CSI-RS resources are configured by the serving base station comprises: sending a second Downlink Control Information (DCI) signaling to the UE, wherein the second DCI signaling includes at least one piece of second pairing information, each piece of second pairing information in the at least one piece of second pairing information is used to indicate time-frequency resource position information of a second CSI-RS resource relative to the first CSI-RS resource in one Physical Resource Block (PRB), or each piece of second pairing information is used to indicate time-frequency resource position information of the second CSI-RS resource, the second CSI-RS resource is any one of the at least two CSI-RS resources that is different from the first CSI-RS resource, so that the UE determines the second CSI-RS resource indicated by the first CSI-RS resource and the second pairing information as being configured by the serving base station, the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except time-frequency resource position information.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the sending, to the UE, a demodulation reference signal DMRS and notifying the UE that the DMRS is configured by the serving base station includes:

transmitting, to the UE, the DMRS within a same subframe as the second DCI signaling such that the UE configures the at least two CSI-RS resources indicated by the second DCI signaling with the DMRS transmitted within the subframe.

In a second aspect, a method of configuring a pilot signal is provided, including:

a serving base station sends a first Downlink Control Information (DCI) signaling to first User Equipment (UE), wherein the first DCI signaling comprises first indication information, and the first indication information is used for indicating that a Physical Downlink Shared Channel (PDSCH) is not sent at the same time when a first demodulation reference signal (DMRS) is sent;

the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH.

In a first possible implementation form of the second aspect,

the sending the first DCI signaling includes:

after detecting that the first UE is accessed, sending the first DCI signaling; or,

and receiving an uplink signaling sent by the first UE, and sending the first DCI signaling according to the uplink signaling.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the transmitting the first DMRS and not the PDSCH to the first UE includes:

after the first DCI signaling is sent every time, the first DMRS is sent periodically and the PDSCH is not sent; or,

transmitting the first DMRS once and not transmitting the PDSCH every time the first DCI signaling is transmitted once.

With reference to the second aspect or any possible implementation manner of the second aspect, in a third possible implementation manner, the transmitting, by the serving base station, the first DMRS and not the PDSCH to the first UE further includes:

the serving base station sends the first DMRS to the first UE and does not send the PDSCH, the serving base station sends a second DMRS to a second UE on the time-frequency resource corresponding to the first DMRS, and meanwhile the serving base station sends a second PDSCH corresponding to the second DMRS to the second UE.

With reference to the second aspect or any possible implementation manner of the second aspect, in a fourth possible implementation manner, after the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, the method further includes:

and sending a third PDSCH and a third DMRS simultaneously sent with the third PDSCH to the first UE so that the first UE can demodulate the third PDSCH according to the third DMRS.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, or before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, the method further includes: transmitting, to the first UE, a first virtual cell number parameter for generating the first DMRS;

before the transmitting the third PDSCH and the third DMRS transmitted simultaneously with the third PDSCH to the first UE, or in the transmitting the third PDSCH and the third DMRS transmitted simultaneously with the third PDSCH to the first UE, the method further comprises: transmitting a second virtual cell number parameter for generating the third DMRS to the first UE,

the first virtual cell number parameter and the second virtual cell number parameter are the same, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the same first virtual cell number parameter and second virtual cell number parameter.

With reference to the fourth possible implementation manner of the second aspect, in a sixth possible implementation manner, before the third PDSCH and the third DMRS that is simultaneously transmitted with the third PDSCH are transmitted to the first UE, or in the third PDSCH and the third DMRS that is simultaneously transmitted with the third PDSCH are transmitted to the first UE, the method further includes: the serving base station sends Radio Resource Control (RRC) signaling to the first UE, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

before or in conjunction with transmitting the third PDSCH and the third DMRS that is transmitted concurrently with the third PDSCH to the first UE, the method further comprising: the first DCI signaling further comprises second indication information, wherein the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

before or in conjunction with transmitting the third PDSCH and the third DMRS that is transmitted concurrently with the third PDSCH to the first UE, the method further comprising: the serving base station sends a second DCI signaling to the first UE, wherein the second DCI signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information.

In a third aspect, a method for configuring a pilot signal is provided, including:

a User Equipment (UE) acquires at least two channel state information reference signal (CSI-RS) resources configured by a serving base station, and the at least two CSI-RS resources are configured by the serving base station;

and the UE receives a demodulation reference signal (DMRS) sent by the serving base station and knows that the DMRS is configured by the serving base station.

In a first possible implementation form of the third aspect,

the UE knows at least two CSI-RS resources configured by a serving base station, and the at least two CSI-RS resources are configured by the serving base station, including:

the UE receives a first Radio Resource Control (RRC) signaling sent by the serving base station, wherein the first RRC signaling comprises:

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner, the learning that the DMRS is configured by the base station includes:

receiving a first Downlink Control Information (DCI) signaling sent by the serving base station, wherein the first DCI signaling comprises second indication information, and the second indication information is used for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station, and knowing that the DMRS and the at least two CSI-RS resources are configured by the serving base station according to the first DCI signaling; or

Receiving first RRC signaling sent by the serving base station, wherein the first RRC signaling comprises second indication information, the second indication information is used for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station, and the DMRS and the at least two CSI-RS resources are known to be configured by the serving base station according to the first RRC signaling; or

Receiving a second RRC signaling sent by the serving base station, wherein the second RRC signaling comprises second indication information, the second indication information is used for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station, and the DMRS and the at least two CSI-RS resources are known to be configured by the serving base station according to the second RRC signaling.

With reference to the third aspect, in a third possible implementation manner, the learning of at least two CSI-RS resources configured by one serving base station, and the configuration of the at least two CSI-RS resources by the serving base station, includes:

receiving RRC signaling sent by the serving base station, wherein the RRC signaling comprises a first CSI-RS resource which is any one of the at least two CSI-RS resources;

receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes at least one piece of second pairing information, where each piece of second pairing information in the at least one piece of second pairing information is used to indicate time-frequency resource position information of a second CSI-RS resource relative to the first CSI-RS resource in one physical resource block PRB, or each piece of second pairing information is used to indicate time-frequency resource position information of the second CSI-RS resource, the second CSI-RS resource is any one of the at least two CSI-RS resources that is different from the first CSI-RS resource, and the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except the time-frequency resource position information;

determining the first CSI-RS resource and the second CSI-RS resource indicated by the second pairing information as being configured by the serving base station.

With reference to the third aspect, in a fourth possible implementation manner, the receiving the DMRS sent by the serving base station and knowing that the DMRS is configured by the serving base station includes:

receiving the DMRS transmitted by the serving base station within a same subframe as the second DCI signaling;

determining the at least two CSI-RS resources indicated by the second DCI signaling and the DMRS transmitted within the subframe as configured by the serving base station.

In a fourth aspect, a method for configuring a pilot signal is provided, including:

user Equipment (UE) receives a first Downlink Control Information (DCI) signaling sent by a serving base station, wherein the first DCI signaling comprises first indication information, and the first indication information is used for indicating that a Physical Downlink Shared Channel (PDSCH) is not sent at the same time when a first demodulation reference signal (DMRS) is sent;

and the UE receives the first DMRS sent by the serving base station, wherein the first DMRS is not sent at the same time as the PDSCH.

In a first possible implementation form of the fourth aspect,

further comprising:

the UE receives a third PDSCH transmitted by the serving base station and a third DMRS transmitted simultaneously with the third PDSCH;

the UE demodulates the third PDSCH according to the third DMRS.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the method further includes:

the UE receives a first virtual cell number parameter used for generating the first DMRS and a second virtual cell number parameter used for generating the third DMRS, which are sent by the serving base station, wherein the first virtual cell number parameter and the second virtual cell number parameter are the same;

and the UE acquires that the first DMRS and the third DMRS are configured by the serving base station according to the same first virtual cell number parameter and the same second virtual cell number parameter.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner, the method further includes:

the UE receives Radio Resource Control (RRC) signaling sent by the serving base station, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station; the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

the first DCI signaling further comprises second indication information, wherein the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, and the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

the UE receives a second DCI signaling sent by the serving base station, wherein the second DCI signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station; and the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information.

In a fifth aspect, a serving base station is provided, including:

a configuration module, configured to configure at least two CSI-RS resources for a UE, and notify the UE that the at least two CSI-RS resources are configured by the serving base station;

a first sending module, configured to send a demodulation reference signal, DMRS, to the UE and inform the UE that the DMRS is configured by the serving base station.

In a first possible implementation form of the fifth aspect,

at least two CSI-RS resources in the at least two CSI-RS resources configured by the configuration module are mapped to different Orthogonal Frequency Division Multiplexing (OFDM) symbols; or,

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the configuration module is specifically configured to:

With reference to the second possible implementation manner of the fifth aspect, in a third possible implementation manner, the method further includes:

a second transmitting module for notifying the UE that the DMRS is configured by the serving base station by transmitting first Downlink Control Information (DCI) signaling to the UE, wherein the first DCI signaling includes second indication information for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station; or

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the configuration module is specifically configured to:

sending RRC signaling to the UE, wherein the RRC signaling comprises a first CSI-RS resource which is any one of the at least two CSI-RS resources;

sending a second Downlink Control Information (DCI) signaling to the UE, wherein the second DCI signaling includes at least one piece of second pairing information, each piece of second pairing information in the at least one piece of second pairing information is used to indicate time-frequency resource position information of a second CSI-RS resource relative to the first CSI-RS resource in one Physical Resource Block (PRB), or each piece of second pairing information is used to indicate time-frequency resource position information of the second CSI-RS resource, the second CSI-RS resource is any one of the at least two CSI-RS resources that is different from the first CSI-RS resource, so that the UE determines the second CSI-RS resource indicated by the first CSI-RS resource and the second pairing information as being configured by the serving base station, the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except time-frequency resource position information.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the first sending module is specifically configured to:

In a sixth aspect, there is provided a serving base station comprising:

a first sending module, configured to send a first downlink control information DCI signaling to a first user equipment UE, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent at the same time when a first demodulation reference signal DMRS is sent;

a second transmitting module, configured to transmit the first DMRS to the first UE and not transmit the PDSCH.

In a first possible implementation form of the sixth aspect,

the first sending module is specifically configured to:

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the second sending module is specifically configured to:

With reference to the sixth aspect or any possible implementation manner of the sixth aspect, in a third possible implementation manner, the third sending module is configured to send the second DMRS to the second UE on the time-frequency resource corresponding to the first DMRS, and simultaneously, the serving base station sends the second PDSCH corresponding to the second DMRS to the second UE.

With reference to the sixth aspect or any possible implementation manner of the sixth aspect, in a fourth possible implementation manner, the method further includes:

and a fourth sending module, configured to send the third PDSCH and a third DMRS that is sent simultaneously with the third PDSCH to the first UE, so that the first UE demodulates the third PDSCH according to the third DMRS.

With reference to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner, the method further includes:

a fifth transmitting module, configured to transmit, to the first UE, a first virtual cell number parameter for generating the first DMRS; and sending a second virtual cell number parameter for generating the third DMRS to the first UE, wherein the first virtual cell number parameter and the second virtual cell number parameter are the same, so that the UE knows that the first DMRS and the third DMRS are configured by the serving base station according to the same first virtual cell number parameter and second virtual cell number parameter.

With reference to the fourth possible implementation manner of the sixth aspect, in a sixth possible implementation manner, the first DCI signaling further includes second indication information, where the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station, so that the UE knows that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or, the serving base station further includes:

a sixth sending module, configured to send radio resource control, RRC, signaling to the first UE, where the RRC signaling includes second indication information, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station, so that the UE knows that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

and sending a second DCI signaling to the first UE, wherein the second DCI signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information.

In a seventh aspect, a UE is provided, including:

a first obtaining module, configured to obtain at least two CSI-RS resources configured by a serving base station, and the at least two CSI-RS resources are configured by the serving base station;

and the second acquisition module is used for receiving a demodulation reference signal (DMRS) sent by the serving base station and acquiring that the DMRS is configured by the serving base station.

In a first possible implementation manner of the seventh aspect,

the first learning module is specifically configured to:

receiving a first Radio Resource Control (RRC) signaling sent by the serving base station, wherein the first RRC signaling comprises:

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner, the second learning module is specifically configured to:

In a third possible implementation manner of the seventh aspect, the first learning module is specifically configured to:

With reference to the third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, the second learning module is specifically configured to:

In an eighth aspect, a UE is provided, including:

a first receiving module, configured to receive a first downlink control information DCI signaling sent by a serving base station, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent simultaneously when a first demodulation reference signal DMRS is sent;

and a second receiving module, configured to receive the first DMRS sent by the serving base station, where the first DMRS is not sent at the same time as the PDSCH.

In a first possible implementation form of the eighth aspect,

a third receiving module, configured to receive a third PDSCH transmitted by the serving base station and a third DMRS simultaneously transmitted with the third PDSCH;

a demodulation module to demodulate the third PDSCH according to the third DMRS.

With reference to the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the method further includes:

a fourth receiving module, configured to receive a first virtual cell number parameter used for generating the first DMRS and a second virtual cell number parameter used for generating the third DMRS, where the first virtual cell number parameter and the second virtual cell number parameter are the same, and the first virtual cell number parameter and the second virtual cell number parameter are sent by the serving base station;

a first determining module, configured to learn, according to the same first virtual cell number parameter and the same second virtual cell number parameter, that the first DMRS and the third DMRS are configured by the serving base station.

With reference to the first possible implementation manner of the eighth aspect, in a third possible implementation manner, the method further includes:

a fifth receiving module, configured to receive a radio resource control, RRC, signaling sent by the serving base station, where the RRC signaling includes second indication information, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station; the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes second indication information, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station; the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or, second indication information is further included in the first DCI signaling, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station, and the UE learns that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information;

and a second determining module, configured to learn, according to the second indication information, that the first DMRS and the third DMRS are configured by the serving base station.

In a ninth aspect, there is provided a serving base station comprising:

a processor configured to configure at least two CSI-RS resources for a UE;

a transmitter for transmitting the at least two CSI-RS resources to the UE and informing the UE that the at least two CSI-RS resources are configured by the serving base station, and transmitting a demodulation reference signal (DMRS) to the UE and informing the UE that the DMRS is configured by the serving base station.

In a first possible implementation form of the ninth aspect,

at least two CSI-RS resources in the at least two CSI-RS resources configured by the processor are mapped to different Orthogonal Frequency Division Multiplexing (OFDM) symbols; or,

With reference to the ninth aspect or the first possible implementation manner of the ninth aspect, in a second possible implementation manner, the transmitter is specifically configured to:

With reference to the second possible implementation manner of the ninth aspect, in a third possible implementation manner, the transmitter is further specifically configured to:

With reference to the ninth aspect or the first possible implementation manner of the ninth aspect, in a fourth possible implementation manner, the transmitter is specifically configured to:

With reference to the fourth possible implementation manner of the ninth aspect, in a fifth possible implementation manner, the transmitter is further specifically configured to:

In a tenth aspect, there is provided a serving base station comprising:

a processor configured to generate a first downlink control information DCI signaling and a first demodulation reference signal DMRS;

a transmitter, configured to send a first downlink control information DCI signaling to a first user equipment UE, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent simultaneously when a first demodulation reference signal DMRS is sent.

In a first possible implementation form of the tenth aspect,

the transmitter is specifically configured to:

With reference to the tenth aspect or the first possible implementation manner of the tenth aspect, in a second possible implementation manner, the transmitter is further specifically configured to:

With reference to the tenth aspect or any possible implementation manner of the tenth aspect, in a third possible implementation manner, the transmitter is further configured to:

With reference to the tenth aspect or any possible implementation manner of the tenth aspect, in a fourth possible implementation manner, the transmitter is further configured to:

With reference to the fourth possible implementation manner of the tenth aspect, in a fifth possible implementation manner, the transmitter is further configured to:

transmitting, to the first UE, a first virtual cell number parameter for generating the first DMRS;

transmitting, to the first UE, a second virtual cell number parameter for generating the third DMRS;

With reference to the fourth possible implementation manner of the tenth aspect, in a sixth possible implementation manner, the transmitter is further configured to:

sending Radio Resource Control (RRC) signaling to the first UE, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

the first DCI signaling further comprises second indication information, wherein the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

In an eleventh aspect, a UE is provided, including:

the receiver is used for receiving at least two CSI-RS resources configured by the same serving base station and receiving a DMRS (demodulation reference signal) sent by the serving base station;

a processor configured to learn that the at least two channel state information reference signal, CSI-RS, resources are configured by the serving base station, and to learn that the DMRS is configured by the serving base station.

In a first possible implementation form of the eleventh aspect,

the receiver being particularly useful for

With reference to the first possible implementation manner of the eleventh aspect, in a second possible implementation manner, the receiver is specifically configured to receive a first downlink control information DCI signaling sent by the serving base station, where the first DCI signaling includes second indication information, and the second indication information is used to indicate that the DMRS and at least one CSI-RS resource of the at least two CSI-RS resources are configured by the serving base station; the processor is specifically configured to learn, according to the first DCI signaling, that the DMRS and the at least two CSI-RS resources are configured by the serving base station;

or,

the receiver is specifically configured to receive first RRC signaling sent by the serving base station, where the first RRC signaling includes second indication information, and the second indication information is used to indicate that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station; the processor is specifically configured to learn, according to the first RRC signaling, that the DMRS and the at least two CSI-RS resources are configured by the serving base station;

or,

the receiver is specifically configured to receive second RRC signaling sent by the serving base station, where the second RRC signaling includes second indication information, and the second indication information is used to indicate that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station; the processor is specifically configured to learn, according to the second RRC signaling, that the DMRS and the at least two CSI-RS resources are configured by the serving base station.

With reference to the third possible implementation manner of the eleventh aspect, the receiver is specifically configured to receive an RRC signaling sent by the serving base station, where the RRC signaling includes a first CSI-RS resource, and the first CSI-RS resource is any one of the at least two CSI-RS resources; receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes at least one piece of second pairing information, where each piece of second pairing information in the at least one piece of second pairing information is used to indicate time-frequency resource position information of a second CSI-RS resource relative to the first CSI-RS resource in one physical resource block PRB, or each piece of second pairing information is used to indicate time-frequency resource position information of the second CSI-RS resource, the second CSI-RS resource is any one of the at least two CSI-RS resources that is different from the first CSI-RS resource, and the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except the time-frequency resource position information;

the processor is specifically configured to determine the first CSI-RS resource and the second CSI-RS resource indicated by the second pairing information as being configured by the serving base station.

With reference to the third possible implementation manner of the eleventh aspect, in a fourth possible implementation manner, the receiver is specifically configured to receive the DMRS sent by the serving base station in a same subframe as the second DCI signaling;

the processor is specifically configured to determine the at least two CSI-RS resources indicated by the second DCI signaling and the DMRS transmitted within the subframe as configured by the serving base station.

In a twelfth aspect, a UE is provided, including:

a receiver, configured to receive a first downlink control information DCI signaling sent by a serving base station, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent at the same time when a first demodulation reference signal DMRS is sent; receiving the first DMRS transmitted by the serving base station, wherein the first DMRS is not transmitted at the same time as the PDSCH;

a processor to buffer the first DCI signaling and the first DMRS.

In a first possible implementation form of the twelfth aspect,

the receiver is further configured to receive a third PDSCH transmitted by the serving base station and a third DMRS transmitted simultaneously with the third PDSCH;

the processor is further configured to demodulate the third PDSCH in accordance with the third DMRS.

With reference to the first possible implementation manner of the twelfth aspect, in a second possible implementation manner, the receiver is further configured to: receiving a first virtual cell number parameter used for generating the first DMRS and a second virtual cell number parameter used for generating the third DMRS, which are sent by the serving base station, wherein the first virtual cell number parameter and the second virtual cell number parameter are the same;

the processor is further configured to learn that the first DMRS and the third DMRS are configured by the serving base station according to the same first virtual cell number parameter and the same second virtual cell number parameter.

With reference to the second possible implementation manner of the twelfth aspect, in a third possible implementation manner, the receiver is further configured to: receiving Radio Resource Control (RRC) signaling sent by the serving base station, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station; or, the first DCI signaling further includes second indication information, where the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station; or receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes second indication information, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station;

the processor is further configured to learn from the second indication information that the first DMRS and the third DMRS are configured by the serving base station.

Through the technical scheme, the same service base station configures at least two CSI-RS resources which are co-sited with the same UE, and the at least two CSI-RS resources are co-sited with the DMRS, namely are co-sited with the PDSCH scheduled by the service base station for the UE, so that when the UE adopts the at least two CSI-RS resources of the co-sited to perform time-frequency synchronization, the UE can be synchronized to the service base station, the accuracy of the time-frequency synchronization is improved, and the demodulation performance is further improved; or, the serving base station configures the DMRS that is not simultaneously transmitted with the PDSCH for the UE, and the UE may perform time-frequency synchronization according to the DMRS that is not simultaneously transmitted with the PDSCH, and since the DMRS that is not simultaneously transmitted with the PDSCH is also transmitted by the serving base station that schedules the PDSCH for the UE, the DMRS may be synchronized to the serving base station, so that accuracy of time-frequency synchronization is improved, and demodulation performance is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a flowchart illustrating a method for configuring a pilot signal according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of time-frequency resources occupied by a CSI-RS sequence in an embodiment of the present invention;

fig. 3 is a schematic diagram of time-frequency resources occupied by DMRS and PDSCH in the embodiment of the present invention;

FIG. 4 is a schematic diagram of time-frequency resources occupied by corresponding CSI-RS sequences when three CSI-RS resources sharing a station are configured in the embodiment of the present invention;

fig. 5 is a schematic diagram of location information corresponding to two CSI-RS resources configured for a common station in an embodiment of the present invention when the two adjacent subframes are used;

FIG. 6 is a flowchart illustrating a method of configuring a pilot signal according to another embodiment of the present invention;

FIG. 7 is a schematic view of the system corresponding to FIG. 6;

FIG. 8 is a flowchart illustrating a method of configuring a pilot signal according to another embodiment of the present invention;

FIG. 9 is a flowchart illustrating a method of configuring a pilot signal according to another embodiment of the present invention;

FIG. 10 is a block diagram of a serving BS according to an embodiment of the invention;

FIG. 11 is a schematic structural diagram of a serving BS according to another embodiment of the present invention;

FIG. 12 is a diagram illustrating a UE according to an embodiment of the present invention;

FIG. 13 is a diagram illustrating a UE according to another embodiment of the present invention;

FIG. 14 is a block diagram of a serving BS according to an embodiment of the invention;

FIG. 15 is a schematic structural diagram of a serving base station according to another embodiment of the present invention;

FIG. 16 is a diagram illustrating a UE according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a UE according to another 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.

In a CoMP scenario, since the CRS sequence received by the UE is from a macro base station or an overlay sequence, it is not appropriate to perform time-frequency synchronization with the CRS sequence when the serving base station of the UE is an RRH. For this reason, in the embodiment of the present invention, the first way is that the serving base station configures at least two CSI-RS resources (CSI-RS resources) that are co-located for the UE, and the second way is that the serving base station configures DMRS resources that are not transmitted simultaneously with the PDSCH for the UE. Optionally, the UE may perform time-frequency synchronization according to at least two CSI-RS resources of the co-station, or DMRS resources that are not transmitted simultaneously with the PDSCH. For details, reference may be made to the following examples.

In the embodiment of the present invention, the two pilot resource co-sited means that different pilot resources and corresponding pilot sequences thereof are configured and transmitted by the same serving base station. Alternatively, the UE may infer the Large scale characteristics of one received pilot signal from the Large scale characteristics (Large-scale characteristics) of another received pilot signal of the co-station. Large scale features include some or all of the following: delay spread (Delay spread), Doppler spread (Doppler spread), Frequency shift (Frequency shift), average Received power (averaged Received power), and Received Timing (Received Timing).

The serving base station (serving base station) in the embodiment of the present invention may be a base station (NodeB, NB), an evolved base station (eNB, evolved NodeB), a Macro base station (Macro eNB), a Radio Head (RRH), a Pico base station (Pico eNodeB), a Home base station (Home eNB), or various stations capable of providing wireless services for the UE, such as an LTE hotspot and an Indoor enhanced small base station (LTE-Hi).

Fig. 1 is a flowchart illustrating an embodiment of a method for configuring a pilot signal according to the present invention, including:

step 11: a serving base station configures at least two CSI-RS resources for a UE and informs the UE that the at least two CSI-RS resources are configured by the serving base station;

after configuring the CSI-RS resource for the UE, the serving base station may send a CSI-RS sequence according to the CSI-RS resource, and the UE may perform time-frequency synchronization and the like according to the CSI-RS sequence.

In this embodiment of the present invention, the at least two CSI-RS resources are configured by the serving base station, which may also be referred to as that the at least two CSI-RS resources are co-sited.

In the embodiment of the invention, each CSI-RS resource at least comprises the following five CSI-RS resource parameters:

antenna port configuration information (antennaportcount-r 11): mainly indicating configured port information of the CSI-RS, and optionally configuring 1 antenna port, 2 antenna ports, 4 antenna ports or 8 antenna ports;

time-frequency resource location information (resourceConfig-r 11): mainly indicating the time-frequency resource position information of the CSI-RS in one RB;

subframe configuration information (subframe config-r 11): mainly indicating the period of the CSI-RS and the time domain resource position information thereof in one period;

power information (p-C-r 11): mainly indicating the Pc information of the CSI-RS.

Initialization parameters (X-r 11): the method is mainly used for calculating initialization parameters of a pseudo-random sequence generator for generating the CSI-RS sequence, and the range is [0,503 ].

The transmission bandwidth of the CSI-RS is consistent with the bandwidth of the serving cell in the frequency domain, and no additional definition or signaling is required.

It can be understood that, in this embodiment, the names indicating the parameters included in the CSI-RS resource may also be other names indicating the same functions.

In the embodiment of the present invention, the at least two CSI-RS resources of the co-station (that is, configured by the same serving base station) may specifically be Non-zero power CSI-RS resources (NZP CSI-RSResource).

Step 12: the serving base station transmits a DMRS to the UE and informs the UE that the DMRS is configured by the serving base station.

The DMRS of this embodiment is sent in one subframe simultaneously with the PDSCH, the PDSCH is the PDSCH scheduled by the serving base station to the UE, and the UE demodulates the PDSCH according to the DMRS.

In this embodiment of the present invention, the DMRS is configured by the serving base station, which may also be referred to as that the DMRS is co-sited with the at least two CSI-RS resources.

Because the DMRS and the PDSCH are co-sited, when the DMRS is co-sited with the at least two CSI-RS resources, the PDSCH is co-sited with the at least two CSI-RS resources, and the UE can be synchronized to a site sending the PDSCH when the UE adopts the at least two CSI-RS resources to perform time-frequency synchronization, so that the demodulation performance is ensured.

In LTE/LTE-a, one antenna port corresponds to one time-frequency Resource Grid (Resource Grid), a basic unit in one Resource Grid is called Resource Element (RE), each RE can be uniquely represented by (k, l), where k represents a sequence number of a frequency domain subcarrier and l represents a sequence number of a time domain Orthogonal Frequency Division Multiplexing (OFDM) symbol in one subframe. One Physical Resource Block (PRB) has a size of 14 OFDM symbols continuous in a time domain and 12 subcarriers continuous in a frequency domain. As shown in fig. 2, the diagram is a schematic diagram of REs that can be occupied by CSI-RS sequences transmitted on each antenna port by CSI-RS resources in one PRB when 1 antenna or 2 antenna ports are configured.

When 1 antenna Port is configured, a CSI-RS resource is transmitted on 2 REs in a CSI-RS sequence corresponding to each PRB on the antenna Port 15, and corresponds to a group of frequency-domain identical time-domain neighbors (0, 1). When configuring 2 antenna ports, the CSI-RS sequences corresponding to one CSI-RS resource in each PRB on antenna ports Port 15 and Port 16 are sent on the same 2 REs, and the CSI-RS sequences sent on 2 antenna ports correspond to a group of (0,1) adjacent to each other in the same frequency domain and the same time domain, and are multiplexed in a CDM manner. Referring to fig. 2, for a 2-port scenario, there are 20 possible time-frequency resource positions that can be occupied by a CSI-RS sequence corresponding to each CSI-RS resource. When configuring 4 antenna ports, one CSI-RS resource occupies a group marked as frequency-domain identical time-domain neighbors (0,1) on antenna ports Port 15 and Port 16 in a CDM multiplexing manner, and occupies a group marked as frequency-domain identical time-domain neighbors (2,3) on antenna ports Port 17 and Port 18 in a CDM multiplexing manner. When 8 antenna ports are configured, one CSI-RS resource occupies a group marked as frequency-domain identical time-domain neighbors in a CDM multiplexing manner on antenna ports Port 15 and Port 16 (0,1), occupies a group marked as frequency-domain identical time-domain neighbors in a CDM multiplexing manner on antenna ports Port 17 and Port 18 (2,3), occupies a group marked as frequency-domain identical time-domain neighbors in a CDM multiplexing manner on antenna ports Port 19 and Port 20 (4,5), and occupies a group marked as frequency-domain identical time-domain neighbors in a CDM multiplexing manner on antenna ports Port 21 and Port 22 (6, 7).

In the prior art, in a scenario where an eNB configures one 2-antenna port CSI-RS resource, the eNB selects one of the 20 possible positions, and transmits a CSI-RS sequence at the selected position.

In this embodiment, for one UE, the same site configures at least two CSI-RS resources for the UE, and may send corresponding CSI-RS sequences according to the configured at least two CSI-RS resources, for example, in fig. 2, a time-frequency resource occupied by CSI-RS sequences corresponding to two CSI-RS resources that the site configures to the same UE is represented by a filled time-frequency resource, the site sends the corresponding CSI-RS sequences to the UE on the configured time-frequency resource, and then the UE may perform time-frequency synchronization according to the received CSI-RS sequences corresponding to the two CSI-RS resources.

When the serving base station transmits the PDSCH to the UE, the serving base station simultaneously transmits the DMRS, and the UE demodulates the received PDSCH according to the DMRS. As shown in fig. 3, the time-frequency resources occupied by the DMRS and the PDSCH are respectively represented by different padding manners, it can be understood that the possible time-frequency positions of the CSI-RS sequence shown in fig. 2 are also used for transmitting the PDSCH if not used for transmitting the CSI-RS, and fig. 3 exemplifies that the CSI-RS sequence is transmitted at the padding positions shown in fig. 2, and then the remaining possible positions are used for transmitting the PDSCH.

In this embodiment, a network side indicates a CSI-RS resource co-located with a DMRS, and in this embodiment, since the DMRS and the PDSCH are transmitted together, a site transmitting the DMRS is a serving base station of a UE, and the UE needs to be synchronized to the serving base station.

In addition, because the at least two CSI-RS resources are from the same base station, the serving base station can determine that the at least two CSI-RS resources are from the serving base station only by indicating that at least one of the CSI-RS resources and the DMRS are from the same site, and the indication bit overhead can be reduced when only one is indicated.

Optionally, the at least two CSI-RS resources are transmitted by the same eNB, the same Macro, the same RRH, the same Pico, the same Home eNB, or the same LTE-Hi small base station.

Optionally, at least two of the at least two CSI-RS resources are mapped to different Orthogonal Frequency Division Multiplexing (OFDM) symbols. For example, referring to fig. 4, the serving base station configures 3 CSI-RS resources for the same UE, and represents the time-frequency resource positions occupied by the CSI-RS sequences indicated by the 3 CSI-RS resources in a padding manner, as can be seen from fig. 4, the time-frequency resource positions are located on different OFDM symbols, that is, the three CSI-RS resources are respectively mapped to different OFDM symbols.

Because the time domain interval between different CSI-RS resources can affect the precision of frequency offset estimation, the precision is generally higher when the time domain interval is larger, therefore, the precision of frequency offset estimation can be improved by separating the CSI-RS resources on the time domain, and the requirement of frequency synchronization tracking is further met.

Optionally, subframes indicated by the subframe configuration information included in the at least two CSI-RS resources are the same subframe, or two subframes, for example, the CSI-RS resources shown in fig. 2 or fig. 4 indicate the same subframe, or, referring to fig. 5, taking two CSI-RS resources and indicating two adjacent subframes as an example, subframes indicated by the subframe configuration information included in each of the CSI-RS resources may also belong to two adjacent subframes.

Optionally, if multiple serving base stations configure a pilot signal for the same UE, each serving base station may perform processing in a manner similar to the RRH, for example, the eNB also performs processing in the manner of the RRH.

Optionally, when multiple serving base stations schedule the PDSCH for the same UE, which CSI-RS resources and which DMRS are co-sited may be indicated through DCI signaling or RRC signaling.

Correspondingly, the UE side may perform the following steps:

one UE acquires at least two CSI-RS resources configured by one service base station, and the at least two CSI-RS resources are configured by the service base station;

and the UE receives the DMRS sent by the serving base station and knows that the DMRS is configured by the serving base station.

In this embodiment, the same serving base station configures at least two CSI-RS resources for the same UE, and notifies that the UE dmrs is also configured by the serving base station, so that the UE can time-frequency synchronize to an accurate site according to the at least two CSI-RS resources, thereby improving the accuracy of time-frequency synchronization and further improving demodulation performance.

Fig. 6 is a flowchart illustrating a method for configuring a pilot signal according to another embodiment of the present invention, fig. 7 is a system diagram corresponding to fig. 6, and fig. 7 illustrates a CoMP scenario formed by an eNB and an RRH. In this embodiment, the serving base station is taken as an RRH as an example. The embodiment comprises the following steps:

step 61: the RRH sends RRC signaling to the UE, wherein the RRC signaling comprises at least two CSI-RS resources so as to indicate that the at least two CSI-RS resources are co-sited.

For the notification of the CSI-RS resources, the CSI-RS resources may be configured in a CSI-RS configuration information element (CSI-RS-configuration elements) of a radio resource control information element (radio resource control information elements) of RRC signaling, each CSI-RS resource including at least five CSI-RS resource parameters as follows:

In this embodiment of the present invention, the at least two CSI-RS resources of the co-station may specifically be Non-zero power CSI-RS resources (NZP CSI-RS resources).

The UE may be informed of the co-sited CSI-RS resources in the following manner:

optionally, a first RRC signaling is sent to the UE, where the first RRC signaling includes:

a CSI-RS configuration information element, the CSI-RS configuration information element including the at least two CSI-RS resources, so that the UE determines the CSI-RS resources included in the first RRC signaling as being configured by the serving base station;

for example, at least two configured CSI-RS resources are respectively expressed as CSI-RS resource-1 and CSI-RS resource-2, the CSI-RS resource-1 comprises antennaPortscount-r 11-1, resourceConfig-r 11-1, subframeConfig-r 11-1, p-C-r 11-1 and X-r 11-1, and the CSI-RS resource-2 comprises antennaPortscount-r 11-2, resourceConfig-r 11-2, subframeConfig-r 11-2, p-C-r 11-2 and X-r 11-2, then the CSI-RS configuration information unit may include antennaPortscount-r11 ~ 1, resourceConfig-r11 ~ 1, subframeConfig-r11 ~ 1, p-C-r11 ~ 1 and X-r11 ~ 1, and antennaPortscount-r 11-2, resourceConfig-r 11-2, subframeConfig-r 11-2, p-C-r 11-2, and X-r 11-2. After the UE receives the RRC signaling containing the CSI-RS configuration information unit, the CSI-RS resource-1 and the CSI-RS resource-2 can be determined to be co-sited.

Or,

at least two CSI-RS configuration information elements, each of the at least two CSI-RS configuration information elements including one of the at least two CSI-RS resources and first indication information, and the first indication information in the at least two CSI-RS configuration information elements being the same, so that the UE determines the at least two CSI-RS resources as being configured by the serving base station according to the same first indication information;

taking the two configured CSI-RS resources as an example, two CSI-RS configuration information units may be included in the RRC signaling, where one CSI-RS configuration information unit includes antennapotscount-r 11-1, resourceConfig-r 11-1, subframeConfig-r 11-1, p-C-r 11-1 and X-r 11-1, and co-sited indication information-1, and another CSI-RS configuration information unit includes antennapotscount-r 11-2, resourceConfig-r 11-2, subframeConfig-r 11-2, p-C-r 11-2, and X-r 11-2, and co-sited indication information-2, where co-sited indication information-1 and co-sited indication information-2 are the same, for example, both are 1. The value of the co-station indication information may be 0,1, 2 or 3, when the value is 0, it indicates that there are no co-station multiple CSI-RS resources, and when the co-station indication information corresponding to at least two CSI-RS resources is the same and the co-station indication information is not 0, it indicates that the CSI-RS resources are co-station.

Or,

Taking the two CSI-RS resources configured as above as an example, one CSI-RS configuration information element may be included in the RRC signaling, the CSI-RS configuration information unit comprises antennaPortsCount-r 11-1, resourceConfig-r 11-1, subframe Config-r 11-1, p-C-r 11-1, X-r 11-1 and pairing indication information, taking 2 antenna ports as an example, when one CSI-RS resource is determined, the time-frequency resource position information included in one PRB by another CSI-RS resource and the time-frequency resource position information included in one PRB by the determined CSI-RS resource have 8 better possible configurations when the time-frequency synchronization tracking performance of the UE end is considered, then the UE end can be represented by 3-bit pairing indication information, for example, the time-frequency resource location information included in one PRB of the determined one CSI-RS resource is denoted as (k'.₁＝11,l'₁＝2),n_s,11, wherein k'₁Represents the information of subcarriers in the time-frequency resource position information, k ', contained in one PRB of the CSI-RS resource'₁＝0,1,2...11；l'₁Represents information l 'of OFDM symbols in time-frequency resource position information included in one time slot of one PRB of the CSI-RS resource'₁＝0,1,2,...,6；n_s,10,1 denotes slot 0 or slot 1, respectively, then the time-frequency resource location (k ') may be indicated by 000'₁＝2,l'₁＝5),n_s,10, time-frequency resource location (k ') is indicated by 001'₁＝3,l'₁＝5),n_s,1The remaining positions may be indicated in a similar manner, 0. As yet another example of an implementation of the method,

suppose (k'₁,l'₁),n_s,1Representing time frequency resource position information l 'of one CSI-RS resource in one PRB'₁＝5，n_s,10, or 1, k'₁2,3,8, or 9; then (k'₂,l'₂),n_s,2Can be that

L'₂＝2,n_s,2K 'when equal to 1'₂＝(k'₁-2),(k'₁-1),k'₁,(k'₁+1),(k'₁+ 2); or

When n is_s,1≠n_s,2K'₂＝(k'₁-1),k'₁,(k'₁+1)。

When the time-frequency synchronization tracking performance of the UE is considered, the second location information has the above 8 possibilities, and therefore, the second location information may be indicated by using the pair indication information with 3 bits, and therefore, under the above condition, only 3 bits are needed to indicate two CSI-RS resources of a co-station.

Step 62: the RRH sends the DMRS and the PDSCH to the UE, and sends Downlink Control Information (DCI) signaling or RRC signaling to the UE, wherein the DCI signaling or the RRC signaling comprises indication information, and the indication information is used for indicating that at least one CSI-RS resource and the DMRS in the at least two CSI-RS resources are co-sited so as to inform the UE that the DMRS and the at least two CSI-RS resources are co-sited.

The RRC signaling in this step may be the same RRC signaling as that in step 61, or may be different RRC signaling.

That is, the user may, optionally,

notifying the UE that the DMRS is configured by the serving base station by transmitting Downlink Control Information (DCI) signaling to the UE, wherein the DCI signaling includes second indication information for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station; or

Since the CSI-RS resources are co-sited, when the DMRS is indicated to be co-sited with at least one of the CSI-RS resources, it can be determined that the CSI-RS resources are co-sited with the DMRS.

In the embodiment, the common-station CSI-RS resource is sent and indicated through the RRC signaling, and the common-station DMRS and the common-station CSI-RS resource are sent and indicated through the DCI signaling or the RRC signaling, so that time-frequency synchronization can be performed according to the common-station CSI-RS resource, and the synchronization accuracy is improved.

Fig. 8 is a flowchart illustrating a method for configuring a pilot signal according to another embodiment of the present invention, where the embodiment still takes an RRH as a serving base station as an example, the embodiment includes:

step 81: the RRH sends RRC signaling to the UE, wherein the RRC signaling comprises a first CSI-RS resource, and sends DCI signaling to the UE, the DCI signaling comprises at least one pair information, each pair information is used for indicating the time-frequency resource position information of the second CSI-RS resource relative to the first CSI-RS resource in one PRB, or, each second pairing information is used for indicating time-frequency resource location information of the second CSI-RS resource, the first CSI-RS resource is any one of the at least two CSI-RS resources, the second CSI-RS resource is any one of the at least two CSI-RS resources different from the first CSI-RS resource, the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except time-frequency resource position information.

As described above, one CSI-RS resource may be indicated by a CSI-RS configuration information element in one RRC signaling, and at least another CSI-RS resource paired with the RRC-configured CSI-RS resource may be indicated by a DCI signaling, so as to configure multiple CSI-RS resources for the UE.

Unlike the previous embodiment, the present embodiment indicates which CSI-RS resources are co-sited through DCI signaling.

Take the example of configuring two CSI-RS resources and using 2-port antennas for transmission.

The time-frequency resource location information included in the CSI-RS resources of two same RBs can be respectively used as (k'₁,l'₁),n_s,1And (k'₂,l'₂),n_s,2Is represented by (a) wherein k'₁And k'₂Respectively represents the information k 'of a subcarrier in the time-frequency resource position information included in one PRB of one CSI-RS resource'₁,k'₂＝0,1,2...11；l'₁And l'₂Respectively represents information l 'of OFDM symbols in time frequency resource position information included in one time slot of one PRB of one CSI-RS resource'₁,l'₂＝0,1,2,...,6；n_s,1,n_s,20 and 1 respectively denote a time slot 0 or a time slot 1.

Time-frequency resource location information included in one PRB of one CSI-RS resource may be indicated by resourceConfig-r11 in a CSI-RS configuration information element, and in particular, (k ') may be used'₁,l'₁),n_s,1And (4) showing.

After the first location information is determined in the above manner, the second location information may be indicated by 3 bits, for example,

When n is_s,1≠n_s,2K'₂＝(k’₁-1),k'₁,(k'₁+1)。

When the time-frequency synchronization tracking performance of the UE is considered, there are 8 possibilities for the second location information, so that the second location information can be indicated by three bits, and therefore, under the above conditions, only 3 bits are needed to indicate two co-sited CSI-RS resources.

Step 82: the RRH transmits the DMRS to the UE within the same subframe as the DCI signaling, such that the UE determines the at least two CSI-RS resources co-sited as indicated by the DCI signaling to be co-sited with the DMRS transmitted within the same subframe.

Different from the foregoing embodiment, in the previous embodiment, it is further required to indicate that the DMRS and the CSI-RS resources are co-sited by using signaling, and in this embodiment, the UE may determine, as default, at least two CSI-RS resources jointly indicated by the DMRS, the CSI-RS configuration information element and the DCI signaling, which are sent in the same subframe, as co-sited.

In particular, if multiple serving base stations configure a pilot signal for the same UE, each serving base station may perform processing in a manner similar to the RRH described above, and in this case, DCI signaling or RRC signaling is required to indicate that the DMRS and the CSI-RS resource indicated by the CSI-RS configuration information element are co-sited, so as to obtain that the DMRS and at least two CSI-RS resources are co-sited.

In this embodiment, the RRC signaling and the DCI signaling jointly indicate the co-sited CSI-RS resource, so that the UE can determine that the DMRS in the same subframe and the CSI-RS resource indicated by the DCI signaling are co-sited, perform synchronization according to the co-sited CSI-RS resource, and improve synchronization accuracy.

Fig. 9 is a flowchart illustrating another embodiment of a method for configuring a pilot signal according to the present invention, including:

step 91: a serving base station sends a first DCI signaling to a first UE, wherein the first DCI signaling comprises first indication information, and the first indication information is used for indicating that a PDSCH is not sent at the same time when a first DMRS is sent;

and step 92: the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH.

Optionally, the first DCI signaling is sent by the serving base station after detecting that the first UE is accessed; or,

the first DCI signaling is sent after the serving base station receives the uplink signaling sent by the first UE, that is, triggered and sent by the first UE.

Optionally, after the first DCI signaling is sent once, the first DMRS is periodically sent and the PDSCH is not sent; or, the first DMRS is transmitted once and the PDSCH is not transmitted once per transmission of the first DCI signaling.

The first DCI signaling may include 1-bit indication information, for example, when the 1-bit indication information is "1" or "0", the indication indicates that the PDSCH is not transmitted simultaneously when only the DMRS is transmitted, or the PDSCH is transmitted simultaneously when the DMRS is transmitted.

In the embodiment of the invention, the DMRS and the PDSCH are transmitted simultaneously, namely the DMRS and the PDSCH are transmitted at different positions of the same PRB, and the fact that the DMRS and the PDSCH are transmitted at different times means that the PDSCH is not transmitted in the PRB for transmitting the DMRS.

Optionally, the method may further include: and the service base station sends a second DMRS to a second UE on the time-frequency resource corresponding to the first DMRS, and simultaneously sends a second PDSCH corresponding to the second DMRS to the second UE. For example, referring to fig. 3, at time-frequency positions occupied by DMRSs, a first DMRS is transmitted to a first UE, and a second DMRS is transmitted to a second UE, respectively, while at time-frequency positions corresponding to a PDSCH, a second PDSCH is transmitted to the second UE.

Optionally, the method may further include: and the serving base station sends a third PDSCH and a third DMRS corresponding to the third PDSCH to the first UE, so that the first UE demodulates the third PDSCH according to the third DMRS. For example, the serving base station transmits only the DMRS and not the PDSCH within the first PRB, and transmits both the DMRS and the PDSCH within the second PRB.

When the UE decodes the DMRS, the UE needs to generate a DMRS sequence by using a pseudo-random sequence generator, where the calculation of an initialization parameter of the pseudo-random sequence generator is related to a Virtual Cell ID (Virtual Cell ID) parameter configured for the UE by a serving base station, and it is assumed that the Virtual Cell ID parameter is represented by Y. Y transmitted by the same serving base station to the same UE, which do not correspond to DMRS transmitted by PDSCH at the same time and DMRS transmitted by PDSCH at the same time, may be configured to be the same, that is,

optionally, before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, or before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, the method further includes: transmitting, to the first UE, a first virtual cell number parameter for generating the first DMRS;

and the UE acquires that the first DMRS and the third DMRS are configured by the serving base station according to the same first virtual cell number parameter and second virtual cell number parameter.

If the configurations of the DMRSs that are not simultaneously transmitted with the PDSCH and the Y that correspond to the DMRSs that are simultaneously transmitted with the PDSCH and are transmitted with the same UE are different, the co-site information of the DMRSs that are not simultaneously transmitted with the PDSCH and the DMRSs that are simultaneously transmitted with the PDSCH may be indicated in the DCI signaling.

That is, the serving base station sends Radio Resource Control (RRC) signaling to the first UE, wherein the RRC signaling includes second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

the serving base station sends a second DCI signaling to the first UE, wherein the second DCI signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information.

Optionally, when multiple serving base stations serve the same UE, and each serving base station transmits, to the UE, a DMRS that is not simultaneously transmitted with the PDSCH and a DMRS that is simultaneously transmitted with the PDSCH, the following method may be used to indicate which DMRS that is not simultaneously transmitted with the PDSCH (abbreviated DMRS _1) and which DMRS that is simultaneously transmitted with the PDSCH (abbreviated DMRS _2) are co-sited:

the first method is as follows: each service base station configures the same virtual cell number parameter Y for the DMRS _1 and the DMRS _2 transmitted by the service base station, and the Y configured by different service base stations is different, so that the UE can determine which DMRS _1 and which DMRS _2 are co-sited according to the Y; or,

the second method comprises the following steps: each serving base station includes indication information in DCI signaling or RRC signaling transmitted to the UE, the indication information indicating which DMRS _1 and which DMRS _2 are co-sited. For example, when transmitting DCI signaling, the serving base station includes not only indication information indicating DMRS _1 (DMRS that is not transmitted simultaneously with PDSCH) but also indication information indicating DMRS _2 that is co-located with DMRS _ 1.

Accordingly, the UE side may perform the following steps:

the UE receives a first DCI signaling sent by a service base station, wherein the first DCI signaling comprises first indication information, and the first indication information is used for indicating that the PDSCH is not sent at the same time when a first DMRS is sent within a set time;

and the UE receives the first DMRS sent by the serving base station within the set time, wherein the first DMRS and the PDSCH are not sent simultaneously.

In this embodiment, the DMRS that is not simultaneously transmitted together with the PDSCH is transmitted to the UE, so that the UE performs time-frequency synchronization according to the DMRS, and thus the UE can be guaranteed to be time-frequency synchronized to the serving base station, accuracy of time-frequency synchronization is improved, and demodulation performance is improved.

Fig. 10 is a schematic structural diagram of a serving base station 100 according to an embodiment of the present invention, where the serving base station 100 includes a configuration module 101 and a sending module 102; the configuration module 101 configures at least two CSI-RS resources for one UE; a sending module 102 for notifying the UE that the at least two CSI-RS resources are configured by the serving base station; and transmitting a demodulation reference signal (DMRS) to the UE, and informing the UE that the DMRS is configured by the serving base station.

Alternatively to this, the first and second parts may,

the subframe indicated by the subframe configuration information included in the at least two CSI-RS resources is one subframe or two subframes; or,

at least two of the at least two CSI-RS resources configured by the configuration module are mapped to different orthogonal frequency division multiplexing, OFDM, symbols.

Alternatively to this, the first and second parts may,

the sending module is specifically configured to notify the UE that the at least two CSI-RS resources configured by the configuration module are configured by the serving base station as follows:

Alternatively to this, the first and second parts may,

the sending module is specifically configured to send a demodulation reference signal DMRS to the UE as follows, and notify the UE that the DMRS is configured by the serving base station: a second transmitting module for notifying the UE that the DMRS is configured by the serving base station by transmitting first Downlink Control Information (DCI) signaling to the UE, wherein the first DCI signaling includes second indication information for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station to notify the UE that the DMRS and the at least two CSI-RS resources are configured by the serving base station; or

Alternatively to this, the first and second parts may,

the sending module is specifically configured to notify the UE that the at least two CSI-RS resources configured by the configuration module are configured by the serving base station as follows: sending RRC signaling to the UE, wherein the RRC signaling comprises a first CSI-RS resource which is any one of the at least two CSI-RS resources;

Alternatively to this, the first and second parts may,

the sending module is specifically configured to send a demodulation reference signal DMRS to the UE as follows, and notify the UE that the DMRS is configured by the serving base station: transmitting, to the UE, the DMRS within a same subframe as the second DCI signaling such that the UE configures the at least two CSI-RS resources indicated by the second DCI signaling with the DMRS transmitted within the subframe.

In this embodiment, at least two CSI-RS resources are configured for the same UE, and the at least two CSI-RS resources and the DMRS of the UE are indicated to be from the same site, so that the UE can time-frequency synchronize to an accurate site according to the at least two CSI-RS resources, thereby improving the accuracy of time-frequency synchronization and further improving demodulation performance.

Fig. 11 is a schematic structural diagram of a serving base station 110 according to another embodiment of the present invention, where the serving base station includes a first sending module 111 and a second sending module 112; the first sending module 111 is configured to send a first downlink control information DCI signaling to a first user equipment UE, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent at the same time when a first demodulation reference signal DMRS is sent; the second transmitting module 112 is configured to transmit the first DMRS to the first UE and not transmit the PDSCH.

Alternatively to this, the first and second parts may,

the first sending module is specifically configured to:

Alternatively to this, the first and second parts may,

the second sending module is specifically configured to:

Optionally, the serving base station

Further comprising:

and a third sending module, configured to send a second DMRS to a second UE on the time-frequency resource corresponding to the first DMRS, and simultaneously send, to the second UE, a second PDSCH corresponding to the second DMRS by the serving base station.

Optionally, the serving base station

Further comprising:

Optionally, the serving base station

Further comprising:

Optionally, the first DCI signaling further includes second indication information, where the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station, so that the UE knows that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or, the serving base station further includes:

Fig. 12 is a schematic structural diagram of a UE120 according to an embodiment of the present invention, where the UE includes a first learning module 121 and a second learning module 122; the first obtaining module 121 is configured to obtain at least two CSI-RS resources configured by a serving base station, and the at least two CSI-RS resources are configured by the serving base station; the second learning module 122 is configured to receive a demodulation reference signal DMRS sent by the serving base station, and learn that the DMRS is configured by the serving base station.

Alternatively to this, the first and second parts may,

the first learning module is specifically configured to:

Alternatively to this, the first and second parts may,

the second learning module is specifically configured to:

Receiving a second RRC signaling sent by the serving base station, wherein the second RRC signaling comprises second indication information, the second indication information is used for indicating that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station, and the DMRS and the at least two CSI-RS resources are known to be configured by the serving base station according to the second RRC signaling. .

Alternatively to this, the first and second parts may,

the first learning module is specifically configured to:

Alternatively to this, the first and second parts may,

the second learning module is specifically configured to:

Fig. 13 is a schematic structural diagram of another embodiment of the UE of the present invention, where the UE130 includes a first receiving module 131 and a second receiving module 132; the first receiving module 131 is configured to receive a first downlink control information DCI signaling sent by a serving base station, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent simultaneously when a first demodulation reference signal DMRS is sent; the second receiving module 132 is configured to receive the first DMRS sent by the serving base station, where the first DMRS is not sent at the same time as the PDSCH.

Optionally, the UE further includes:

Fig. 14 is a schematic structural diagram of another embodiment of the serving base station of the present invention, where the serving base station 140 includes a processor 141 and a transmitter 142; processor 141 is configured to configure at least two CSI-RS resources for a UE; the transmitter 142 is configured to transmit the at least two CSI-RS resources to the UE and inform the UE that the at least two CSI-RS resources are configured by the serving base station, and to transmit a demodulation reference signal, DMRS, to the UE and inform the UE that the DMRS is configured by the serving base station.

Alternatively to this, the first and second parts may,

the transmitter is specifically configured to:

Alternatively to this, the first and second parts may,

the transmitter is further specifically configured to:

Alternatively to this, the first and second parts may,

the transmitter is specifically configured to:

Alternatively to this, the first and second parts may,

the transmitter is further specifically configured to:

In this embodiment, the transmitter may specifically be a transceiver, and may also specifically be implemented by using an antenna, and the processor may be implemented by using a DSP, an FPGA, or the like. The present embodiment may further include a memory, a data bus, a control bus, an address bus, and the like.

Fig. 15 is a schematic structural diagram of another embodiment of the serving base station of the present invention, where the serving base station 150 includes a processor 151 and a transmitter 152; the processor 151 is configured to generate a first downlink control information DCI signaling and a first demodulation reference signal DMRS; the transmitter 152 is configured to send a first downlink control information DCI signaling to a first user equipment UE, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent simultaneously when a first demodulation reference signal DMRS is sent.

Alternatively to this, the first and second parts may,

the transmitter is specifically configured to:

Alternatively to this, the first and second parts may,

the transmitter is further specifically configured to:

Alternatively to this, the first and second parts may,

the transmitter is further configured to:

Alternatively to this, the first and second parts may,

the transmitter is further configured to:

Alternatively to this, the first and second parts may,

the transmitter is further configured to:

Optionally, the transmitter is further configured to:

Fig. 16 is a schematic structural diagram of another embodiment of the UE of the present invention, where the UE 160 includes a receiver 161 and a processor 162; the receiver 161 is configured to receive at least two CSI-RS resources configured by the same serving base station, and receive a DMRS sent by the serving base station; the processor 162 is configured to learn that the at least two channel state information reference signal, CSI-RS, resources are configured by the serving base station, and to learn that the DMRS is configured by the serving base station.

Alternatively to this, the first and second parts may,

the receiver being particularly useful for

Alternatively to this, the first and second parts may,

the receiver is specifically configured to receive a first downlink control information DCI signaling sent by the serving base station, where the first DCI signaling includes second indication information, and the second indication information is used to indicate that the DMRS and at least one of the at least two CSI-RS resources are configured by the serving base station; the processor is specifically configured to learn, according to the first DCI signaling, that the DMRS and the at least two CSI-RS resources are configured by the serving base station;

or,

Alternatively to this, the first and second parts may,

the receiver is specifically configured to receive an RRC signaling sent by the serving base station, where the RRC signaling includes a first CSI-RS resource, and the first CSI-RS resource is any one of the at least two CSI-RS resources; receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes at least one piece of second pairing information, where each piece of second pairing information in the at least one piece of second pairing information is used to indicate time-frequency resource position information of a second CSI-RS resource relative to the first CSI-RS resource in one physical resource block PRB, or each piece of second pairing information is used to indicate time-frequency resource position information of the second CSI-RS resource, the second CSI-RS resource is any one of the at least two CSI-RS resources that is different from the first CSI-RS resource, and the first CSI-RS resource and the second CSI-RS resource share other CSI-RS resource parameters except the time-frequency resource position information;

Alternatively to this, the first and second parts may,

the receiver is specifically configured to receive the DMRS sent by the serving base station in the same subframe as the second DCI signaling;

In this embodiment, the receiver may specifically be a transceiver, and may also specifically be implemented by using an antenna, and the processor may be implemented by using a DSP, an FPGA, or the like. The present embodiment may further include a memory, a data bus, a control bus, an address bus, and the like.

Fig. 17 is a schematic structural diagram of another embodiment of the UE of the present invention, where the UE 170 includes a receiver 171 and a processor 172; the receiver 171 is configured to receive a first downlink control information DCI signaling sent by a serving base station, where the first DCI signaling includes first indication information, and the first indication information is used to indicate that a physical downlink shared channel PDSCH is not sent at the same time when a first demodulation reference signal DMRS is sent; receiving the first DMRS transmitted by the serving base station, wherein the first DMRS is not transmitted at the same time as the PDSCH; processor 172 is configured to buffer the first DCI signaling and the first DMRS.

Alternatively to this, the first and second parts may,

the receiver is further configured to: receiving a first virtual cell number parameter used for generating the first DMRS and a second virtual cell number parameter used for generating the third DMRS, which are sent by the serving base station, wherein the first virtual cell number parameter and the second virtual cell number parameter are the same;

Optionally, the receiver is further configured to: receiving Radio Resource Control (RRC) signaling sent by the serving base station, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station; or, the first DCI signaling further includes second indication information, where the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station; or receiving a second DCI signaling sent by the serving base station, where the second DCI signaling includes second indication information, and the second indication information is used to indicate that the first DMRS and the third DMRS are configured by the serving base station;

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. A method for configuring a pilot signal, comprising:

2. The method of claim 1, wherein the sending the first DCI signaling comprises:

3. The method of claim 1 or 2, wherein the transmitting the first DMRS to the first UE and not the PDSCH comprises:

4. The method of claim 1 or 2, wherein the serving base station transmitting the first DMRS and not transmitting the PDSCH to the first UE further comprises:

5. The method of claim 1 or 2, wherein after the serving base station transmitting the first DMRS to the first UE and not transmitting the PDSCH, the method further comprises:

6. The method of claim 5,

before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, or before the serving base station transmits the first DMRS to the first UE and does not transmit the PDSCH, the method further comprising: transmitting, to the first UE, a first virtual cell number parameter for generating the first DMRS;

7. The method of claim 5,

before or in conjunction with transmitting the third PDSCH and the third DMRS that is transmitted concurrently with the third PDSCH to the first UE, the method further comprising: the serving base station sends Radio Resource Control (RRC) signaling to the first UE, wherein the RRC signaling comprises second indication information, and the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or,

8. A method for configuring a pilot signal, comprising:

9. The method of claim 8, further comprising:

the UE demodulates the third PDSCH according to the third DMRS.

10. The method of claim 9, further comprising:

11. The method of claim 9, further comprising:

12. A serving base station, comprising:

13. The serving base station of claim 12, wherein the first sending module is specifically configured to:

14. The serving base station according to claim 12 or 13, wherein the second sending module is specifically configured to:

15. The serving base station according to claim 12 or 13, further comprising:

16. The serving base station according to claim 12 or 13, further comprising:

17. The serving base station of claim 16, further comprising:

18. The serving base station of claim 16,

the first DCI signaling further comprises second indication information, wherein the second indication information is used for indicating that the first DMRS and the third DMRS are configured by the serving base station, so that the UE can know that the first DMRS and the third DMRS are configured by the serving base station according to the second indication information; or, the serving base station further includes:

19. A User Equipment (UE), comprising:

20. The UE of claim 19, further comprising:

21. The UE of claim 20, further comprising:

22. The UE of claim 20, further comprising: