CN108390707B

CN108390707B - Method and device used in UE (user equipment) and base station for multi-antenna transmission

Info

Publication number: CN108390707B
Application number: CN201611123939.2A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2016-12-08
Filing date: 2016-12-08
Publication date: 2020-06-30
Anticipated expiration: 2036-12-08
Also published as: CN108390707A

Abstract

The invention provides a UE for multi-antenna transmission, a method and a device in a base station. The UE sequentially receives the first signaling, receives the first wireless signal and sends first information. The first signaling is used to determine K antenna port groups. The K antenna port groups are used to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number. The invention effectively increases the flexibility of multi-user MIMO scheduling, reduces the complexity of multi-user MIMO scheduling, and can further improve the system throughput and reduce the transmission delay.

Description

Method and device used in UE (user equipment) and base station for multi-antenna transmission

Technical Field

The present invention relates to a scheme for multi-antenna transmission in a wireless communication system.

Background

Large-scale (Massive) MIMO (Multi-Input Multi-Output) is a research hotspot for next-generation mobile communication. In massive MIMO, multiple antennas form a narrow beam pointing in a specific direction by beamforming to improve communication quality. The large-scale MIMO can also form different directions through a plurality of antennas, and simultaneously serve a plurality of users, so that the throughput of the large-scale MIMO system is improved, and the transmission delay is reduced.

According to the discussion of 3GPP (3rd Generation Partner Project) RAN1(Radio access Network), massive MIMO becomes an important research direction for NR (New Radio technology) systems.

In a large-scale MIMO system, multi-user MIMO is an important technology for improving system throughput, and how to optimize multi-user scheduling through UE reporting in the large-scale MIMO system is an urgent problem to be solved.

Disclosure of Invention

The present invention discloses a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

The invention discloses a method for UE (user equipment) in multi-antenna transmission, which comprises the following steps:

-step a. receiving a first signalling;

-step b. receiving a first wireless signal;

-step c. sending the first information;

wherein the first signaling is used to determine K antenna port groups. The K antenna port groups are used to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number.

As an embodiment, the method has the advantage that the UE reports K1 antenna port groups with poor channel quality, and as a scheduling of multi-user MIMO, the base station can invoke other UEs to transmit in the beam direction associated with the K1 antenna port groups, and the transmission does not cause large interference to the transmission band of the UE.

As an embodiment, the first signaling explicitly indicates the K antenna port groups.

As an embodiment, the first signaling implicitly indicates the K antenna port groups.

As an embodiment, the first signaling is semi-static signaling.

As an embodiment, the first signaling is higher layer signaling.

As an embodiment, the first signaling includes one or more RRC IEs (information elements).

As an embodiment, the first signaling is dynamic signaling.

As an embodiment, the first signaling is physical layer signaling.

As an embodiment, the first signaling is carried by a downlink physical layer control channel (i.e. a downlink channel that can only be used for carrying physical layer signaling).

As an embodiment, the downlink Physical layer control Channel is a PDCCH (Physical downlink control Channel).

In an embodiment, the downlink physical layer control channel is an spdcch (short pdcch).

As an embodiment, the first signaling carries DCI (Downlink control information).

As an embodiment, the first signaling carries fast downlink control Information (fast downlink control Information).

As an embodiment, the first signaling is cell-common.

As one embodiment, the first signaling is for the UE.

As an embodiment, the first signaling is for a terminal group, the terminal group includes a plurality of terminals, and the UE is one of the terminals in the terminal group.

As an embodiment, the first signaling is transmitted on a broadcast channel (i.e. a downlink channel that can only be used to carry broadcast signals).

As one embodiment, the Broadcast CHannel includes a PBCH (Physical Broadcast CHannel).

As one embodiment, the first wireless signal is a multicarrier symbol.

As one embodiment, the first wireless signal is a single carrier symbol.

As one embodiment, the first radio signal is an OFDM (Orthogonal Frequency-division multiplexing) symbol.

As one embodiment, the first wireless signal is an FBMC (Filter Bank MultiCarrier) symbol.

As an embodiment, the first wireless signal is an SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbol.

As an embodiment, the first wireless signal is a reference signal associated with the K antenna port groups.

As an embodiment, the first wireless signal is a wireless resource block transmitted by the K antenna port groups.

As an embodiment, the first wireless Signal includes one or more of { PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal), MIB (Master Information Block)/SIB (System Information Block), CSI-RS (Channel State Information Reference Signal) }.

As an embodiment, the antenna port is formed by superimposing a plurality of physical antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of physical antennas to the antenna port form a beamforming vector for the antenna Virtualization.

As an example, the beamforming vectors corresponding to any two different antenna ports cannot be assumed to be the same.

As an example, the small scale characteristics of the wireless channel experienced by a signal transmitted by one antenna port cannot be used to infer the small scale characteristics of the wireless channel experienced by a signal transmitted by another antenna port.

As an example, one antenna port is associated with one reference signal.

As an embodiment, the pattern of time-frequency resources occupied by the reference signals in one subframe reuses the pattern of CSI-RS in one subframe.

As one embodiment, the reference signal is a CSI-RS.

In one embodiment, the sequence corresponding to the reference signal is a Zadoff-Chu sequence.

As an embodiment, the sequence corresponding to the reference signal is a pseudo-random sequence.

As an embodiment, the time domain resource occupied by the reference signal is associated with at least one of the time domain resource occupied by the { the first information, the time domain resource occupied by the first wireless signal }.

As an embodiment, the frequency domain resource occupied by the reference signal is associated with at least one of { the frequency domain resource occupied by the first information, the frequency domain resource occupied by the first wireless signal }.

As an embodiment, the frequency domain resources occupied by the reference signal are configurable.

As an embodiment, the K antenna port groups are respectively associated with K reference signal groups.

For one embodiment, the antenna port set includes a plurality of antenna ports.

As an embodiment, the antenna port set comprises only one antenna port.

As an embodiment, K sets of beamforming vectors are used for transmission through the K sets of antenna ports, respectively.

As an embodiment, K sets of beamforming vectors are used to transmit the K sets of reference signals, respectively.

As one embodiment, K sets of analog beamforming vectors are used for transmission through the K sets of antenna ports, respectively.

As an embodiment, K sets of analog beamforming vectors are used to transmit the K sets of reference signals, respectively.

For one embodiment, the set of beamforming vectors includes a plurality of beamforming vectors.

For one embodiment, the set of beamforming vector values comprises one beamforming vector.

For one embodiment, the set of analog beamforming vectors includes a plurality of analog beamforming vectors.

For one embodiment, the set of analog beamforming vector values comprises one analog beamforming vector.

As an embodiment, the air interface resources occupied by one antenna port are different from the air interface resources occupied by another antenna port.

As an embodiment, an air interface resource occupied by one reference signal is different from an air interface resource occupied by another reference signal.

As an embodiment, the air interface resource includes at least one of { time domain resource, frequency domain resource, code domain resource }.

As an embodiment, patterns (patterns) of reference signals transmitted by at least two antenna ports in the K antenna port groups within a time-frequency resource block are the same.

As an embodiment, the time-frequency Resource Block is a PRBP (Physical Resource Block Pair).

As an embodiment, the time-frequency resource block occupies W subcarriers in a frequency domain and occupies one wideband symbol in a time domain. Wherein W is a positive integer greater than 1.

As an embodiment, the wideband symbol is one of { OFDM symbol, SC-FDMA symbol, SCMA symbol }.

As an embodiment, the manner in which the first wireless signal is transmitted by the K antenna port groups is as follows: the first wireless signal comprises the K reference signal groups, and the corresponding beamforming vector groups of the K reference signal groups are used for respectively mapping the K reference signal groups to a group of physical antennas for transmission.

As an embodiment, the K antenna port groups respectively correspond to K time domain resources, and the K time resources are orthogonal.

For one embodiment, the K antenna port groups correspond to P1 time domain resources, and the P1 is a positive integer smaller than K.

As an example, the K1 antenna port groups correspond to K1 reference signal groups. The K1 channel quality values are derived from measurements on the K1 sets of reference signals.

As an example, K1 is equal to 1.

As one example, the K1 is greater than 1.

As one example, the K1 is the default.

As an example, the K1 is base station configured.

As an embodiment, the K1 is calculated by the UE.

As an embodiment, the first information explicitly indicates the K1 antenna port groups.

As an embodiment, the first information implicitly indicates the K1 antenna port groups.

As an embodiment, a bit map (bitmap) is used to determine the K1 antenna port groups in the first information.

As an embodiment, the first information includes a CRI (CSI-RS Resource Indicator, CSI-RS Resource indication), and the CRI indicates CSI-RS resources corresponding to the K1 antenna port groups from CSI-RS resources corresponding to the K antenna port groups.

As an embodiment, the physical layer channel corresponding to the first information includes an uplink physical layer control channel (i.e., an uplink channel that can only be used for carrying physical layer signaling).

As an embodiment, the Uplink Physical layer control channel is a PUCCH (Physical Uplink control channel).

As an embodiment, at least one of the first information is RACH Preamble (Preamble), { sequence of the RACH Preamble, time-frequency resource occupied by the RACH Preamble }, is used to determine the first antenna port group.

As an embodiment, the Physical layer CHannel corresponding to the first information includes a PRACH (Physical random access CHannel).

As an embodiment, the unit of the channel quality is dB, and the unit of the first threshold is dB.

As one embodiment, the unit of the channel quality is dBm and the unit of the first threshold is dB.

As an embodiment, the unit of the channel quality is dBm and the unit of the first threshold is dBm.

As one embodiment, the unit of the channel quality is milliwatts and the unit of the first threshold is milliwatts.

As an embodiment, the channel Quality includes at least one of { RSRP (Reference Signal Receiving power), RSRQ (Reference Signal Receiving Quality), SINR (Signal Interference Noise Ratio) }.

As an embodiment, the first reference channel quality is a default.

As an embodiment, the first reference channel quality is base station configured.

As an embodiment, the first reference channel quality is calculated by the UE.

As an embodiment, the calculation manner of the first reference channel quality is configured by the base station.

As an embodiment, the first reference channel quality is a maximum value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first reference channel quality is an average value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first reference channel quality is a worst channel quality corresponding to antenna ports corresponding to the K antenna port groups except the K1 antenna port groups.

As an embodiment, the first threshold is a default.

As one embodiment, the first threshold is 0.

As an embodiment, the first threshold is configured by a base station.

As an embodiment, the first threshold is calculated by the UE.

As an embodiment, the first threshold is a worst channel quality corresponding to antenna ports of the K antenna port groups other than the K1 antenna port groups minus a best channel quality corresponding to antenna ports of the K1 antenna port groups.

As one embodiment, the first information is used for multi-user MIMO.

As one embodiment, the first information is used for multi-cell interference coordination.

As an embodiment, the first information is used for a Coordinated MultiPoint (CoMP) technique.

As an embodiment, the first information is used for Coordinated Scheduling (Coordinated Scheduling).

As one embodiment, the first information is used for cooperative beamforming (coordinated beamforming).

In particular, according to an aspect of the invention, it is characterized in that said first information is further used for determining K2 antenna port groups of said K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number.

As an embodiment, the above method is advantageous in that the beamforming vectors associated with the K2 antenna port groups may be used to determine a beamforming vector for at least one of { data transmission, reference signal transmission, control signaling transmission } for the UE, thereby increasing the received signal power of the UE.

As an example, the K2 antenna port groups correspond to K2 reference signal groups. The K2 channel quality values are derived from measurements on the K2 sets of reference signals.

As one embodiment, the K is greater than or equal to the result of the K1 plus the K2.

As an example, K2 is equal to 1.

As one example, the K2 is greater than 1.

As one example, the K2 is the default.

As an example, the K2 is base station configured.

As an embodiment, the K2 is calculated by the UE.

As an embodiment, the first information explicitly indicates the K2 antenna port groups.

As an embodiment, the first information implicitly indicates the K2 antenna port groups.

As an embodiment, a bit map is used to determine the K2 antenna port groups in the first information.

As an embodiment, a ternary string is used to determine the K1 antenna port groups and the K2 antenna port groups in the first information. The ternary character string corresponds to the K antenna port groups. The length of the ternary character string is K.

As an embodiment, a 0 of the ternary string indicates that the corresponding antenna port group is one of the K1 antenna port groups; 1 of the ternary string indicates that the corresponding antenna port group is one of the K2 antenna port groups; a 2 of the ternary string indicates that the corresponding antenna port group does not belong to either the K1 antenna port groups or the K2 antenna port groups.

As an embodiment, a binary string corresponding to the ternary string is used to determine the K1 antenna port groups and the K2 antenna port groups in the first information.

As one embodiment, the decimal value corresponding to the binary string is the same as the decimal value corresponding to the ternary string.

As an example, the decimal value corresponding to the binary string differs from the decimal value corresponding to the ternary string by a fixed decimal value.

As an embodiment, the first information includes a CRI indicating CSI-RS resources corresponding to the K2 antenna port groups from CSI-RS resources corresponding to the K antenna port groups.

As an embodiment, the unit of the channel quality is dB, and the unit of the second threshold is dB.

As an example, the unit of the channel quality is dBm and the unit of the second threshold is dB.

As an embodiment, the unit of the channel quality is dBm and the unit of the second threshold is dBm.

As one embodiment, the unit of the channel quality is milliwatts and the unit of the second threshold is milliwatts.

As an embodiment, the second reference channel quality is default.

As an embodiment, the second reference channel quality is base station configured.

As an embodiment, the second reference channel quality is calculated by the UE.

As an embodiment, the second reference channel quality is calculated by the base station

As an embodiment, the second reference channel quality is a minimum value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the second reference channel quality is an average value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the second reference channel quality is a best channel quality corresponding to antenna ports corresponding to the K antenna port groups except the K2 antenna port groups.

As an embodiment, the first reference channel quality is the worst channel quality value of the K2 channel quality values.

As an embodiment, the second reference channel quality is the best channel quality value among the K1 channel quality values.

For one embodiment, the second reference channel quality is equal to the first reference channel quality.

As one embodiment, the second threshold is default

As one embodiment, the second threshold is 0.

As an embodiment, the second threshold is configured by a base station.

As an embodiment, the second threshold is calculated by the UE

As an embodiment, the second threshold is a worst channel quality corresponding to an antenna port of the K2 antenna port groups minus a best channel quality corresponding to an antenna port of the K antenna port groups other than the K2 antenna port groups.

In particular, according to an aspect of the present invention, the first signaling is further used to determine at least one of { the first reference channel quality, the calculation manner of the first reference channel quality, the first threshold, the second reference channel quality, the calculation manner of the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }. Wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3. The K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

As an embodiment, the method has an advantage that the reporting mode of the UE can be flexibly configured.

As an embodiment, the first signaling explicitly indicates at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }.

As an embodiment, the first signaling implicitly indicates at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }.

As an embodiment, the first signaling is used to determine the first threshold, and the first reference channel quality is measured and calculated by the UE.

As an embodiment, the first signaling is used to determine the second threshold, and the second reference channel quality is measured and calculated by the UE.

As an embodiment, the first signaling is used to determine the first reference channel quality, and the first threshold is measured and calculated by the UE.

As an embodiment, the first signaling is used to determine the second reference channel quality, and the second threshold is measured and calculated by the UE.

As an embodiment, the first signaling is used to determine a calculation manner of a first reference channel quality, where the calculation manner of the first reference channel quality is: the first reference channel quality is a maximum value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first signaling is used to determine a calculation manner of a first reference channel quality, where the calculation manner of the first reference channel quality is: the first reference channel quality is an average value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first signaling is used to determine a calculation manner of a first reference channel quality, where the calculation manner of the first reference channel quality is: the first reference channel quality is a worst channel quality corresponding to antenna ports corresponding to the K antenna port groups except the K1 antenna port groups.

As an embodiment, the first signaling is used to determine a calculation manner of a first reference channel quality, where the calculation manner of the first reference channel quality is: the first reference channel quality is the worst value among the K2 channel quality values.

As an embodiment, the first signaling is used to determine a calculation manner of the second reference channel quality, where the calculation manner of the second reference channel quality is: the second reference channel quality is a worst value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first signaling is used to determine a calculation manner of the second reference channel quality, where the calculation manner of the second reference channel quality is: the second reference channel quality is an average value of channel qualities corresponding to antenna ports in the K antenna port groups.

As an embodiment, the first signaling is used to determine a calculation manner of the second reference channel quality, where the calculation manner of the second reference channel quality is: the second reference channel quality is a best channel quality corresponding to antenna ports corresponding to the K antenna port groups except the K2 antenna port groups.

The first signaling is used for determining a calculation mode of a second reference channel quality, and the calculation mode of the second reference channel quality is as follows: the second reference channel quality is the best value of the K1 channel quality values.

As an embodiment, the first signaling is used to determine the K3, the K1 is equal to the K3. The K antenna port groups correspond to K channel quality values. P1 of the K channel quality values being less than or equal to the sum of the first reference channel quality plus the first threshold, the P1 being greater than the K3.

As one embodiment, the K1 channel quality values are the worst K1 of the P1 channel quality values.

As an embodiment, the first signaling is used to determine the K3, the K1 is less than or equal to the K3. The K antenna port groups correspond to K channel quality values. Any one of the K channel quality values other than the K1 channel quality values is greater than the sum of the first reference channel quality plus the first threshold.

As an embodiment, the first signaling is used to determine the K1, and the first reference channel quality and the first threshold are measured and calculated by the UE. The K1 channel quality values are the worst K1 channel quality values of the K channel quality values. The first reference channel quality is the worst of the K channel quality values divided by the K1 channel quality values. The first threshold is equal to the first reference channel quality minus the best of the K1 channel quality values.

As an embodiment, the first signaling is used to determine the K4, the K2 is equal to the K4. The K antenna port groups correspond to K channel quality values. P2 of the K channel quality values being greater than or equal to the sum of the second reference channel quality plus the second threshold, the P2 being greater than the K4.

For one embodiment, the K2 channel quality values are the best K2 of the P2 channel quality values.

As an embodiment, the first signaling is used to determine the K4, the K2 is less than or equal to the K4. The K antenna port groups correspond to K channel quality values. Any one of the K channel quality values other than the K2 channel quality values is less than the sum of the second reference channel quality plus the second threshold.

As an embodiment, the first signaling is used to determine the K2, and the second reference channel quality and the second threshold are measured and calculated by the UE. The K2 channel quality values are the best K2 channel quality values of the K channel quality values. The second reference channel quality is the best of the K channel quality values divided by the K2 channel quality values. The second threshold is equal to the worst of the K2 channel quality values minus the second reference channel quality.

In particular, according to one aspect of the present invention, said first information is further used for determining at least one of { said first reference channel quality, said second reference channel quality, said first threshold value, said second threshold value }.

As an embodiment, the above method has a benefit that the base station can perform better scheduling for the UE through more reported information.

As an embodiment, the first information explicitly indicates at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

As an embodiment, the first information implicitly indicates at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

Specifically, according to one aspect of the present invention, the method further comprises the following steps:

-a step C of manipulating the second radio signal

Wherein the first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The operation is receiving, a first antenna port group is an antenna port group used for transmitting the second wireless signal, the second beamforming vector is used for transmitting the second wireless signal through the first antenna port group, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the operation is sending, where the second beamforming vector is used by a target recipient to receive the second wireless signal, and the first beamforming vector is used by the target recipient to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal. The air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

As an embodiment, the method has the advantage that the base station can perform multi-user MIMO or multi-cell coordinated optimal scheduling on multiple UEs by using the reports of the multiple UEs, so as to reduce interference among users, thereby improving system throughput.

As an example, the operation is transmission, and the target receiver assumes symmetry between an uplink channel and a downlink channel.

As an embodiment, the second wireless signal is a time-frequency Resource Block (Resource Block) corresponding to the first antenna port group.

As an embodiment, the second wireless signal is a PDSCH time-frequency resource block corresponding to the UE, and the third wireless signal is a PDSCH time-frequency resource block corresponding to the second UE.

As an embodiment, the second wireless signal is a PUSCH time-frequency resource block corresponding to the UE, and the fourth wireless signal is a PUSCH time-frequency resource block corresponding to the second UE.

As an embodiment, the second wireless signal is a reference signal group corresponding to the first antenna port group.

As an embodiment, the operation is receiving, and the third wireless signal is a downlink reference signal corresponding to the second UE.

As an embodiment, the operation is transmission, and the fourth wireless signal is an uplink reference signal corresponding to the second UE.

As an embodiment, the operation is receiving, and the third wireless signal is downlink physical layer control information corresponding to the second UE.

As an embodiment, the operation is sending, and the fourth wireless signal is uplink physical layer control information corresponding to the second UE.

As one embodiment, the operation is receiving, the first antenna port group corresponds to a first DMRS (Reference Signal) group, and the second antenna port group corresponds to a second DMRS group.

As an embodiment, the first DMRS group and the second DMRS group are orthogonal on an air interface resource.

For one embodiment, the first beamforming vector is used for beamforming corresponding to the K1 antenna port groups.

For one embodiment, the first beamforming vector is used for analog beamforming for the K1 antenna port groups.

As one embodiment, the operation is receiving and the first beamforming vector is used for analog beamforming for transmitting the third wireless signal.

As one embodiment, the operation is transmitting, the first beamforming vector is used by the target recipient for analog beamforming to receive the fourth wireless signal.

For one embodiment, the second beamforming vector is used for beamforming corresponding to the K2 antenna port groups.

For one embodiment, the second beamforming vector is used for analog beamforming for the K2 antenna port groups.

As one embodiment, the operation is receiving and the second beamforming vector is used for analog beamforming for transmitting the second wireless signal.

As one embodiment, the operation is transmitting, the first beamforming vector is used by the target recipient for analog beamforming of receiving the second wireless signal.

The invention discloses a method used in a base station of multi-antenna transmission, which comprises the following steps:

-step a. sending a first signaling;

-step b. transmitting a first wireless signal;

-step c. receiving first information;

wherein the first signaling is used to determine K antenna port groups. The K antenna port groups are used to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is sent by a target UE. The first information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number.

As an embodiment, the first signaling is cell-common.

As one embodiment, the first wireless signal is for a plurality of UEs.

For one embodiment, the first information includes CRI associated with the K1 antenna port groups.

For one embodiment, the first information includes CRI associated with the K2 antenna port groups.

As an embodiment, the first signaling includes M fields, where the M fields correspond to M values of { the first reference channel quality, the calculation manner of the first reference channel quality, the first threshold, the second reference channel quality, the calculation manner of the second reference channel quality, the second threshold, the K1, the K2, the K3, and the K4}, respectively, and the M is a positive integer.

As an embodiment, the first signaling comprises one of { the K1, K3 }.

As an embodiment, the first signaling comprises one of { the K2, K4 }.

As one embodiment, the first signaling includes the first threshold.

As an embodiment, at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold } is used for multi-user MIMO scheduling.

As an embodiment, at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold } is used for multi-cell cooperative transmission.

-a step C of executing the second radio signal

Wherein the first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The performing is transmitting, a first antenna port group is an antenna port group used for transmitting the second wireless signal, the second beamforming vector is used for transmitting the second wireless signal to the target UE through the first antenna port group, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the performing is receiving, where the second beamforming vector is used to receive the second wireless signal sent by the target UE, and the first beamforming vector is used to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal. The air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

As an embodiment, the performing is receiving, and the base station assumes symmetry between an uplink channel and a downlink channel.

As an embodiment, the first beamforming vector is associated with a third antenna port group, the third antenna port group being one of the K1 antenna port groups. And the second UE measures the third antenna port group to obtain second channel quality. The second channel quality is greater than or equal to a third reference channel quality plus a third threshold.

As an embodiment, the third reference channel quality is equal to the second reference channel quality.

As an embodiment, the third threshold is equal to the second threshold.

As an embodiment, the third reference channel quality is obtained by measuring and calculating the K antenna port groups by the second UE.

As an embodiment, the third threshold is obtained by measuring and calculating the K antenna port groups by the second UE.

The invention discloses user equipment for multi-antenna transmission, which comprises the following modules:

-a first receiving module: for receiving a first signaling;

-a second receiving module: for receiving a first wireless signal;

-a third sending module: for transmitting first information;

Specifically, according to an aspect of the present invention, the apparatus is characterized by further comprising the following modules:

-a first module: for operating the second wireless signal.

Wherein the first beamforming vector is associated with the K1 antenna port groups. The operation is receiving, where a first antenna port group is an antenna port group used for sending the second wireless signal, and the first beamforming vector is used for sending a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the operation is sending, and the first beamforming vector is used by the target receiver to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal. The air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

In particular, according to an aspect of the invention, the above apparatus is characterized in that the first information is further used to determine K2 antenna port groups of the K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number.

Specifically, according to an aspect of the present invention, the above apparatus is characterized in that the first signaling is further used to determine at least one of { the first reference channel quality, a calculation manner of the first reference channel quality, the first threshold, the second reference channel quality, a calculation manner of the second reference channel quality, the second threshold, the K1, the K2, the K3, the K4 }. Wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3. The K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

In particular, according to an aspect of the present invention, the above apparatus is characterized in that the first information is further used to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

As an embodiment, the operation is receiving, a second beamforming vector is associated with the K2 antenna port groups, the second beamforming vector is used for transmitting the second wireless signal through the first antenna port group, and the first beamforming vector is used for transmitting the third wireless signal to the second UE through a second antenna port group on the same air interface resource as the second wireless signal.

As an embodiment, the operation is transmitting, a second beamforming vector is associated with the K2 antenna port groups, the second beamforming vector is used by the target receiver to receive the second wireless signal, and the first beamforming vector is used by the target receiver to receive the fourth wireless signal transmitted by the second UE on the same air interface resource as the second wireless signal.

The invention discloses a base station device for multi-antenna transmission, which comprises the following modules:

-a first sending module: for transmitting a first signaling;

-a second sending module: for transmitting a first wireless signal;

-a third receiving module: for receiving first information;

-a second module: for executing the second wireless signal.

Wherein the first beamforming vector is associated with the K1 antenna port groups. The performing is transmitting, a first antenna port group is an antenna port group used for transmitting the second wireless signal to the target UE, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the performing is receiving, and the first beamforming vector is used to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal. The air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

As an embodiment, the performing is transmitting, a second beamforming vector is associated with the K2 antenna port groups, the second beamforming vector is used for transmitting the second wireless signal to the target UE through the first antenna port group, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal.

As an embodiment, the performing is receiving, and a second beamforming vector is associated with the K2 antenna port groups, the second beamforming vector is used to receive the second wireless signal sent by the target UE, and the first beamforming vector is used to receive the fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal.

Compared with the traditional scheme, the invention has the following advantages:

-improving the flexibility of multi-user MIMO and multi-cell cooperative scheduling.

-reducing the complexity of multi-user scheduling and multi-cell cooperative scheduling.

Improving the throughput of the system by exploiting the multi-antenna gain and reducing the interference between users.

-reducing transmission delay through multi-user MIMO and multi-cell cooperative transmission.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings in which:

fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the invention;

FIG. 2 shows a flow diagram of wireless transmission according to another embodiment of the invention;

fig. 3 shows a schematic diagram of K antenna port groups according to an embodiment of the invention;

fig. 4 shows a schematic diagram of K1 antenna port groups and K2 antenna port groups, according to an embodiment of the invention;

fig. 5 shows a schematic diagram of a first beamforming vector and a second beamforming vector according to an embodiment of the invention;

FIG. 6 is a diagram illustrating a first information indication form according to one embodiment of the invention;

fig. 7 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;

fig. 8 shows a block diagram of a processing device used in a base station according to an embodiment of the present invention.

Example 1

Embodiment 1 illustrates a flow chart of wireless transmission according to an embodiment of the present invention, as shown in fig. 1. In fig. 1, base station N1 is the serving cell maintenance base station for UE U2. In fig. 1, the step in block F1 is optional.

For N1, send the first signaling in step S11; transmitting a first wireless signal in step S12; receiving the first information in step S13; the second wireless signal is transmitted in step S14.

For U2, receiving first signaling in step S21; receiving a first wireless signal in step S22; transmitting the first information in step S23; the second wireless signal is received in step S24.

In embodiment 1, the first signaling is used by U2 to determine K antenna port groups. The set of K antenna ports is used by N1 to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is used by N1 to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number.

In sub-embodiment 1 of embodiment 1, the first information is also used by N1 to determine K2 of the K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. A first antenna port group is the antenna port group used by N1 for transmitting the second wireless signal, the second beamforming vector is used by N1 for transmitting the second wireless signal through the first antenna port group, and the first beamforming vector is used by N1 for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal.

In sub-embodiment 2 of embodiment 1, the first signaling is further used by U2 to determine at least one of { the first reference channel quality, the manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, the manner of calculating the second reference channel quality, the second threshold, the K1, the K2, the K3, the K4 }. Wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3. The K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

In sub-embodiment 3 of embodiment 1, the first information is further used by N1 to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

Example 2

Embodiment 2 illustrates a flow chart of wireless transmission according to another embodiment of the present invention, as shown in fig. 2. In fig. 2, base station N3 is the serving cell maintenance base station for UE U4. In embodiment 2, N3 reuses steps S11-S13 in fig. 1 before step 31; u4 reuses steps S21-S23 of FIG. 1 before step 41.

For N3, a second wireless signal is received in step S31.

For U4, a second wireless signal is transmitted in step S41.

In embodiment 2, the first information is also used by N3 to determine K2 antenna port groups of the K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The second beamforming vector is used by N3 to receive the second wireless signal, and the first beamforming vector is used by N3 to receive a fourth wireless signal sent by a second UE on the same air interface resource as the second wireless signal.

Example 3

Embodiment 3 illustrates a schematic diagram of a group of K antenna ports according to an embodiment of the present invention, as shown in fig. 3.

In embodiment 3, K antenna port groups are used for transmitting the first wireless signal. The K antenna port groups correspond to K beamforming vector groups. And the K antenna port groups correspond to the K air interface resource groups. The air interface resource is at least one of { time resource, frequency domain resource and code domain resource }.

In sub-embodiment 1 of embodiment 3, the K sets of air interface resources are orthogonal.

In sub-embodiment 2 of embodiment 3, the set of K sets of air interfaces is K time units.

In sub-embodiment 3 of embodiment 3, the K antenna port groups correspond to K reference signal groups, and the first wireless signal is the K reference signal groups.

Example 4

Embodiment 4 illustrates a schematic diagram of K1 antenna port groups and K2 antenna port groups according to an embodiment of the present invention, as shown in fig. 4.

In embodiment 4, K antenna port groups are used by a base station to transmit a first wireless signal to a target UE. And the target UE measures the K antenna port groups according to the received first wireless signal to obtain K channel quality values. Among the K channel quality values, K1 channel quality values are smaller than or equal to the result of subtracting the first threshold from the first reference channel quality, and K2 channel quality values are larger than or equal to the result of adding the second threshold to the second reference channel quality. The K1 channel quality values are the best K1 channel quality values of the K channel quality values. The K2 channel quality values are the worst K2 channel quality values of the K channel quality values. K1 antenna port groups correspond to the K1 channel quality values. K2 antenna port groups correspond to the K2 channel quality values. And the target UE sends first information to the base station. The first information is used by the base station to determine the K1 antenna port groups and the K2 antenna port groups.

In sub-embodiment 1 of embodiment 4, the base station transmits a first signaling. The first signaling is used by the target UE to determine the first threshold.

In sub-embodiment 2 of embodiment 4, the first reference channel quality is the worst channel quality value of the K2 channel quality values.

In sub-embodiment 3 of embodiment 4, the base station transmits a first signaling. The first signaling is used by the target UE to determine the first reference channel quality, the first threshold being equal to 0.

In a sub-embodiment 4 of the embodiment 4, the base station transmits a first signaling. The first signaling is used by the target UE to determine the second reference channel quality, the second threshold being equal to 0.

In sub-embodiment 5 of embodiment 4, the base station transmits the first signaling. The first signaling is used by the target UE to determine the second threshold. The second reference channel quality is the worst channel quality value of the K channel quality values.

Example 5

Embodiment 5 illustrates a schematic diagram of a first beamforming vector and a second beamforming vector according to an embodiment of the present invention, as shown in fig. 5.

In embodiment 5, a second beamforming vector is used by a base station to send a second wireless signal to a target UE, a first beamforming vector is used by the base station to send a third wireless signal to a second UE, and the third wireless signal and the second wireless signal are on the same air interface resource; or the second beamforming vector is used by the base station to receive a second wireless signal sent by the target UE, the first beamforming vector is used by the base station to receive a fourth wireless signal sent by the second UE, and the fourth wireless signal and the second wireless signal are on the same air interface resource.

Example 6

Embodiment 6 illustrates a schematic diagram of a first information indication form according to an embodiment of the present invention, as shown in fig. 6. In fig. 6, the bold squares filled with horizontal lines are antenna port groups of K1 antenna port groups, and the bold squares filled with diagonal lines are antenna port groups of K2 antenna port groups.

In embodiment 6, a base station transmits a first wireless signal to a target UE through an 8 antenna port group. And the target UE obtains K channel quality values through measurement calculation, wherein K is equal to 8. The K channel quality values correspond to the 8 antenna port groups, respectively. The K1 antenna port groups correspond to the worst K1 channel quality values of the K channel quality values, respectively. The K2 antenna port groups correspond to the best K2 channel quality values of the K channel quality values, respectively. The K1 antenna port groups are composed of antenna port groups #1 and # 5. The K2 antenna port groups are composed of antenna port groups #3 and # 7. And the target UE sends first information to the base station. The first information is used by the base station to determine the K1 antenna port groups and the K2 antenna port groups. A ternary string of length K is used by the UE to determine whether any of the K antenna port groups is in the K1 antenna port groups and in the K2 antenna port groups. If one antenna port group is in the K1 antenna port groups, setting the corresponding position of the ternary character string to be 0; if one antenna port group is in the K2 antenna port groups, setting the corresponding position of the ternary character string to be 1; if an antenna port group is not in either the K1 antenna port groups or the K2 antenna port groups, then the corresponding position of the ternary string is set to 2. According to the above method, in embodiment 8, the ternary character string is 02120212.

In sub-embodiment 1 of embodiment 6, the ternary string is converted into one binary string 0011101011110 of the same decimal value. The binary string is a 13-bit binary string. The number of bits of the binary string is determined by the maximum possible decimal value of a ternary string of length K. A ternary string of length 8 has a maximum value of 2222222, a corresponding decimal number of 6560, and a corresponding binary number of 13 bits.

Example 7

Embodiment 7 illustrates a block diagram of a processing apparatus used in a UE according to an embodiment of the present invention, as shown in fig. 7.

In fig. 7, the UE apparatus 200 is mainly composed of a first receiving module 201, a second receiving module 202, a third transmitting module 203 and a first module 204.

The first receiving module 201 is configured to receive a first signaling; the second receiving module 202 is configured to receive a first wireless signal; the third sending module 203 is configured to send the first information; the first module 204 is for operating a second wireless signal.

In embodiment 7, the first signaling is used by the UE to determine the K antenna port groups. The K antenna port groups are used by a base station to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is used by a base station to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number.

In sub-embodiment 1 of embodiment 7, the first information is further used by the base station to determine K2 of the K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number.

In sub-embodiment 2 of embodiment 7, the first signaling is further used by the UE to determine at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }. Wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3. The K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

In sub-embodiment 3 of embodiment 7, the first information is further used by the base station to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

In sub-embodiment 4 of embodiment 7, the base station transmits the second radio signal, and the UE receives the second radio signal. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The first antenna port group is an antenna port group used by the base station for sending the second wireless signal, the second beamforming vector is used by the base station for sending the second wireless signal through the first antenna port group, and the first beamforming vector is used by the base station for sending a third wireless signal to the second UE through the second antenna port group on the same air interface resource as the second wireless signal.

In sub-embodiment 5 of embodiment 7, the UE transmits the second radio signal, and the base station receives the second radio signal. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The second beamforming vector is used by a base station to receive the second wireless signal, and the first beamforming vector is used by the base station to receive a fourth wireless signal sent by a second UE on the same air interface resource as the second wireless signal.

Example 8

Embodiment 8 is a block diagram illustrating a processing apparatus used in a base station according to an embodiment of the present invention, as shown in fig. 8.

In fig. 8, a base station apparatus 300 is mainly composed of a first transmitting module 301, a second transmitting module 302, a third receiving module 303 and a second module 304.

The first sending module 301 is configured to send a first signaling; the second sending module 302 is configured to send a first wireless signal; the third receiving module 303 is configured to receive the first information; the second module 304 is for executing the second wireless signal.

In embodiment 8, the first signaling is used by the UE to determine the K antenna port groups. The K antenna port groups are used by a base station to transmit the first wireless signal. The antenna port group comprises a positive integer number of the antenna ports. The first information is sent by a target UE. The first information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 channel quality values. Any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold. And K is a positive integer. The K1 is a positive integer less than or equal to K. The first threshold is a non-negative real number.

In sub-embodiment 1 of embodiment 8, the first information is further used by the base station to determine K2 of the K antenna port groups. The K2 antenna port groups correspond to K2 channel quality values. Any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold. The K2 is a positive integer less than or equal to K. The second threshold is a non-negative real number.

In sub-embodiment 2 of embodiment 8, the first signaling is further used by the UE to determine at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }. Wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3. The K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

In sub-embodiment 3 of embodiment 8, the first information is further used by the base station to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

In a sub-embodiment 4 of the embodiment 8, the base station transmits the second radio signal, and the UE receives the second radio signal. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The first antenna port group is an antenna port group used by the base station for sending the second wireless signal, the second beamforming vector is used by the base station for sending the second wireless signal through the first antenna port group, and the first beamforming vector is used by the base station for sending a third wireless signal to the second UE through the second antenna port group on the same air interface resource as the second wireless signal.

In sub-embodiment 5 of embodiment 8, the UE transmits the second radio signal, and the base station receives the second radio signal. A first beamforming vector is associated with the K1 antenna port groups. A second beamforming vector is associated with the K2 antenna port groups. The second beamforming vector is used by a base station to receive the second wireless signal, and the first beamforming vector is used by the base station to receive a fourth wireless signal sent by a second UE on the same air interface resource as the second wireless signal.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE or the terminal in the invention includes but is not limited to wireless communication equipment such as a mobile phone, a tablet computer, a notebook, a network card, an NB-IOT terminal, an eMTC terminal and the like. The base station or system device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE used for multi-antenna transmission, comprising the steps of:

-step a. receiving a first signalling;

-step b. receiving a first wireless signal;

-step c. sending the first information;

wherein the first signaling is used to determine K antenna port groups; the K antenna port groups are used for transmitting the first wireless signal; the antenna port group comprises a positive integer of the antenna ports; the first information is used for determining K1 antenna port groups with poor channel quality in the K antenna port groups; the K1 antenna port groups correspond to K1 channel quality values; any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold; k is a positive integer; k1 is a positive integer less than or equal to K; the first threshold is a non-negative real number.

2. The method of claim 1, wherein the first information is further used to determine K2 antenna port groups of the K antenna port groups; the K2 antenna port groups correspond to K2 channel quality values; any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold; k2 is a positive integer less than or equal to K; the second threshold is a non-negative real number.

3. The method of claim 2, wherein the first signaling is further used to determine at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }; wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3; the K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

4. The method of claim 2, wherein the first information is further used to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

5. A method according to claim 2 or 3, further comprising the step of:

-a step C of manipulating the second radio signal

Wherein a first beamforming vector is associated with the K1 antenna port groups; a second beamforming vector is associated with the K2 antenna port groups; the operation is receiving, a first antenna port group is an antenna port group used for transmitting the second wireless signal, the second beamforming vector is used for transmitting the second wireless signal through the first antenna port group, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the operation is transmitting, where the second beamforming vector is used by a target receiver to receive the second wireless signal, and the first beamforming vector is used by the target receiver to receive a fourth wireless signal transmitted by the second UE on the same air interface resource as the second wireless signal; the air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

6. A method in a base station used for multi-antenna transmission, comprising the steps of:

-step a. sending a first signaling;

-step b. transmitting a first wireless signal;

-step c. receiving first information;

wherein the first signaling is used to determine K antenna port groups; the K antenna port groups are used for transmitting the first wireless signal; the antenna port group comprises a positive integer of the antenna ports; the first information is sent by a target UE; the first information is used for determining K1 antenna port groups with poor channel quality in the K antenna port groups; the K1 antenna port groups correspond to K1 channel quality values; any one of the K1 channel quality values is less than or equal to a first reference channel quality minus a first threshold; k is a positive integer; k1 is a positive integer less than or equal to K; the first threshold is a non-negative real number.

7. The method of claim 6, wherein the first information is further used to determine K2 antenna port groups of the K antenna port groups; the K2 antenna port groups correspond to K2 channel quality values; any one of the K2 channel quality values is greater than or equal to a second reference channel quality plus a second threshold; k2 is a positive integer less than or equal to K; the second threshold is a non-negative real number.

8. The method of claim 7, wherein the first signaling is further used to determine at least one of { the first reference channel quality, a manner of calculating the first reference channel quality, the first threshold, the second reference channel quality, a manner of calculating the second reference channel quality, the second threshold, the K1, the K2, K3, K4 }; wherein the K3 is used to define the value of the K1, the K1 is less than or equal to the K3; the K4 is used to define a value of the K2, the K2 is less than or equal to the K4.

9. The method of claim 7, wherein the first information is further used to determine at least one of { the first reference channel quality, the second reference channel quality, the first threshold, the second threshold }.

10. The method according to claim 7 or 8, further comprising the steps of:

-a step C of executing the second radio signal

Wherein a first beamforming vector is associated with the K1 antenna port groups; a second beamforming vector is associated with the K2 antenna port groups; the performing is transmitting, a first antenna port group is an antenna port group used for transmitting the second wireless signal, the second beamforming vector is used for transmitting the second wireless signal to the target UE through the first antenna port group, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the performing is receiving, where the second beamforming vector is used to receive the second wireless signal sent by the target UE, and the first beamforming vector is used to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal; the air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

11. A user equipment for multi-antenna transmission, comprising the following modules:

-a first receiving module: for receiving a first signaling;

-a second receiving module: for receiving a first wireless signal;

-a third sending module: for transmitting first information;

12. The user equipment of claim 11, further comprising the following modules:

-a first module: for operating the second wireless signal;

wherein a first beamforming vector is associated with the K1 antenna port groups; the operation is receiving, where a first antenna port group is an antenna port group used for sending the second wireless signal, and the first beamforming vector is used for sending a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the operation is sending, where the first beamforming vector is used by a target receiver to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal; the air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.

13. A base station device for multi-antenna transmission, comprising the following modules:

-a first sending module: for transmitting a first signaling;

-a second sending module: for transmitting a first wireless signal;

-a third receiving module: for receiving first information;

14. The base station apparatus according to claim 13, characterized by further comprising the following modules:

-a second module: for executing the second wireless signal;

wherein a first beamforming vector is associated with the K1 antenna port groups; the performing is transmitting, a first antenna port group is an antenna port group used for transmitting the second wireless signal to the target UE, and the first beamforming vector is used for transmitting a third wireless signal to a second UE through a second antenna port group on the same air interface resource as the second wireless signal; or, the performing is receiving, and the first beamforming vector is used to receive a fourth wireless signal sent by the second UE on the same air interface resource as the second wireless signal; the air interface resource is at least one of { time domain resource, frequency domain resource and code domain resource }.