A method and device for wireless communication

Abstract

The present invention proposes a method and apparatus in wireless communication. The UE first receives a first wireless signal; and then sends a second wireless signal. The first wireless signal is used to determine P, and P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port groups include one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group. The present invention enables the UE to maintain the robustness of uplink transmission. Furthermore, the present invention supports beamforming and beam sweeping of different precisions to meet the needs of different services.

Description

[0001] This application is a divisional application of the following original application:

[0002] -- Filing date of original application: 2016.06.29

[0003] --Original application number: 201610493535.6

[0004] --Title of the invention in the original application: A method and device for wireless communication Technical Field

[0005] The present invention relates to a method and device for multi-antenna transmission in the field of mobile communication technology, and in particular to a wireless communication solution in a scenario where a large number of antennas are deployed on a base station side. Background Art

[0006] Massive MIMO has become a research hotspot for the next generation of mobile communications. In massive MIMO, multiple antennas form narrow beams pointing in a specific direction through beamforming to improve communication quality. The beams formed by multi-antenna beamforming are generally narrow, and both communicating parties need to obtain partial channel information of the other party to make the formed beam point in the correct direction. Before both communicating parties obtain partial channel information of the other party, reliable wireless transmission becomes a problem.

[0007] The present invention discloses a solution to the above problem. It should be noted that, in the absence of conflict, the embodiments and features in the UE (User Equipment) of the present application can be applied to the base station, and vice versa. Further, in the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other. Summary of the invention

[0008] The inventors have found through research that when the UE (User Equipment) does not obtain the CSI (Channel Status Information) of the uplink channel, the UE needs to use greater redundancy to ensure the correct reception of the transmitted signal, such as the beam sweeping scheme, that is, the UE sends the same signal multiple times through TDM (Timing Division Multiplexing), each time sending a beam in a different direction. After the UE obtains (part of) the CSI of the uplink channel, the UE can use beam forming to reduce redundancy, improve transmission efficiency, and ensure the reception quality of the transmitted signal.

[0009] According to the above analysis, the present invention discloses a method in a UE used for multi-antenna transmission, which includes the following steps:

[0010] -Step A. receiving a first wireless signal;

[0011] -Step B. sending a second wireless signal;

[0012] Wherein, the first wireless signal is used to determine P, and P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0013] As an embodiment, the first wireless signal implicitly indicates the P. As a sub-embodiment of this embodiment, the first wireless signal includes {first signaling, first data}, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded. The signaling identifier corresponding to the first signaling is used to determine the P, and the signaling identifier is a positive integer. As an embodiment, the first signaling is DCI (Downlink Control Information), the signaling identifier of the first signaling is RA (Random Access)-RNTI (Radio Network Temporary Identifier), and the P is greater than 1. As an embodiment, the first signaling is DCI, the signaling identifier of the first signaling is C (Cell)-RNTI, and the P is equal to 1.

[0014] As an embodiment, the above-mentioned scheduling information includes at least one of {occupied time-frequency resources, MCS (Modulation and Coding Status), RV (Redundancy Version), HARQ process number (Process Number)}.

[0015] As an embodiment, the first wireless signal explicitly indicates the P. As a sub-embodiment of this embodiment, an information bit in the first wireless signal indicates whether the P is 1 or P1, and the P1 is greater than 1. As an embodiment, the P1 is a fixed constant. As an embodiment, the P1 is configurable.

[0016] As an embodiment, time domain resources occupied by any two of the P sub-signals are orthogonal (ie, do not overlap in the time domain).

[0017] As an embodiment, the sub-signal includes UCI (Uplink Control Information), and the UCI includes at least one of {HARQ-ACK / NACK, SR (Scheduling Requests), CQI (Channel Quality Indicator) feedback, RI (Rank Indicator) feedback, PMI (Precoding Matrix Indicator), CRI (CSI-RS Resource Indicator)}.

[0018] As an embodiment, the physical layer channel corresponding to the first wireless signal includes a downlink physical layer control channel (ie, a downlink channel that can only be used to carry physical layer signaling). As an embodiment, the downlink physical layer control channel is a PDCCH (Physical Downlink Control Channel).

[0019] As an embodiment, the physical layer channel corresponding to the first wireless signal includes a downlink physical layer data channel (ie, a downlink channel that can be used to carry physical layer data). As an embodiment, the downlink physical layer data channel is a PDSCH (Physical Downlink Shared Channel).

[0020] As an embodiment, the transmission channel corresponding to the first wireless signal is DL-SCH (Downlink Shared Channel).

[0021] As an embodiment, the first wireless signal also includes physical layer data.

[0022] As an embodiment, the physical layer channel corresponding to the second wireless signal includes an uplink physical layer control channel (ie, an uplink channel that can only be used to carry physical layer signaling). As an embodiment, the uplink physical layer control channel is PUCCH (Physical Uplink Control Channel).

[0023] As an embodiment, the physical layer channel corresponding to the second wireless signal includes an uplink physical layer data channel (ie, an uplink channel that can be used to carry physical layer data). As an embodiment, the uplink physical layer data channel is a PUSCH (Physical Uplink Shared Channel).

[0024] As an embodiment, the transmission channel corresponding to the second wireless signal is UL-SCH (Uplink Shared Channel, uplink shared channel).

[0025] As an embodiment, the antenna port group includes 1 antenna port.

[0026] As an embodiment, at least two antenna port groups among the P antenna port groups include different numbers of antenna ports.

[0027] As an embodiment, the number of antenna ports included in the P antenna port groups is the same.

[0028] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group means that the small-scale characteristics of the wireless channel experienced by the signal sent by the first antenna port cannot be used by the receiver of the second wireless signal to infer the small-scale characteristics of the wireless channel experienced by the signal sent by the second antenna port. The first antenna port and the second antenna port belong to two different antenna port groups in the P antenna port groups, respectively, and the small-scale characteristics include channel impulse response.

[0029] As an embodiment, the antenna port is formed by superimposing multiple antennas through antenna virtualization, and the mapping coefficients of the multiple antennas to the antenna port constitute a beamforming vector. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the beamforming vectors corresponding to any two antenna ports in the P antenna port group cannot be assumed to be the same.

[0030] In the above embodiment, different antenna ports may use different beamforming vectors to send the second wireless signal, and different beamforming vectors point to different directions. When the UE has not yet obtained the CSI of the uplink channel, the base station may instruct the UE to send the second signal in different beamforming directions on P>1 antenna port groups, thereby enhancing the transmission reliability of the second wireless signal. After the UE obtains (part of) the CSI of the uplink channel, the base station may instruct the UE to send the second wireless signal through a specific beamforming vector on P=1 antenna port groups, thereby reducing transmission redundancy, improving transmission efficiency, and ensuring the transmission reliability of the second wireless signal.

[0031] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the receiver of the second wireless signal does not perform joint channel estimation using the wireless signals sent by any two antenna ports in the P antenna port groups.

[0032] As an embodiment, the beamforming vector corresponding to the antenna port is composed of the product of an analog beamforming matrix and a digital beamforming vector. As a sub-embodiment, the P antenna port groups correspond to P analog beamforming matrices respectively, and the antenna ports in the same antenna port group correspond to the same analog beamforming matrix. As a sub-embodiment, the analog beamforming matrices corresponding to the antenna ports in different antenna port groups are different. As a sub-embodiment, different antenna ports in the same antenna port group correspond to different digital beamforming vectors.

[0033] In the above embodiment, the same analog beamforming matrix corresponding to the antenna ports in the same antenna port group is used to form a same wide beam on the antenna ports in the same antenna port group; different digital beamforming vectors corresponding to the antenna ports in the same antenna port group are used to form different narrow beams within the wide beam on the antenna ports in the same antenna port group. In this way, the UE can flexibly perform beam sweeps with two different accuracies. The base station can select the wide beam by measuring the wireless signals sent by different antenna port groups; the base station can also select the narrow beam within the corresponding wide beam by measuring the wireless signals sent by different antenna ports in the same antenna port group. In this way, the base station can flexibly assist the UE in supporting beamforming with two different accuracies.

[0034] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a TDM (Timing Division Multiplexing) manner.

[0035] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a FDM (Frequency Division Multiplexing) manner.

[0036] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a CDM (Code Division Multiplexing) manner.

[0037] As an embodiment, different antenna ports in the same antenna port group transmit the second wireless signal in a transmit diversity manner. As a sub-embodiment, the transmit diversity is SFBC (Space Frequency Block Coding). As a sub-embodiment, the transmit diversity is STBC (Space Time Block Coding).

[0038] Specifically, according to one aspect of the present invention, it is characterized in that the step A further comprises the following steps:

[0039] - Step A0. Receive a first higher layer signaling, wherein the first higher layer signaling indicates P1.

[0040] Wherein, P is 1, or P is P1. P1 is a positive integer greater than 1.

[0041] As an embodiment, the first high-layer signaling is RRC (Radio Resource Control) signaling.

[0042] As an embodiment, the first high-layer signaling is cell-specific.

[0043] As an embodiment, the first high-layer signaling is UE-specific.

[0044] Specifically, according to one aspect of the present invention, it is characterized in that it also includes the following steps:

[0045] -Step C. receiving a third wireless signal;

[0046] -Step D. sending a fourth wireless signal;

[0047] The third wireless signal is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0048] As an embodiment, the second wireless signal includes P RS port groups, the P RS port groups correspond to the P antenna port groups respectively, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports. As an embodiment, the RS sequence corresponding to the RS port is a Zadoff-Chu sequence. As an embodiment, the RU (Resource Unit) occupied by the RS port is discontinuous in the frequency domain, the RU occupies the duration of an OFDM symbol in the time domain, and occupies the bandwidth of a subcarrier interval in the frequency domain. As an embodiment, the RU is an RE (Resource Element). As an embodiment, the frequency domain intervals between adjacent RUs occupied by the RS port are the same. As an embodiment, the RS sequences corresponding to different RS ports included in the same RS port group are different. As an embodiment, the RS sequences corresponding to different RS ports included in the same RS port group are mutually orthogonal.

[0049] As an embodiment, the pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block, the time-frequency block occupies an OFDM duration in the time domain, and the bandwidth occupied in the frequency domain does not exceed 20 MHz (megahertz). As an embodiment, the bandwidth occupied by the RS port in the frequency domain includes the bandwidths of multiple time-frequency blocks in the frequency domain.

[0050] As an embodiment, the third wireless signal is transmitted on a downlink physical layer control channel. As an embodiment, the downlink physical layer control channel is a PDCCH.

[0051] As an embodiment, the third wireless signal is transmitted on a downlink physical layer data channel. As an embodiment, the downlink physical layer data channel is a PDSCH.

[0052] As an embodiment, the transmission channel corresponding to the third wireless signal is DL-SCH.

[0053] As an embodiment, the third wireless signal also includes physical layer data.

[0054] As an embodiment, the fourth wireless signal includes an uplink physical layer control channel. As an embodiment, the uplink physical layer control channel is PUCCH.

[0055] As an embodiment, the fourth wireless signal includes an uplink physical layer data channel. As an embodiment, the uplink physical layer data channel is a PUSCH.

[0056] As an embodiment, the transmission channel corresponding to the fourth wireless signal is UL-SCH.

[0057] As an embodiment, the fourth wireless signal also includes physical layer data.

[0058] Specifically, according to one aspect of the present invention, it is characterized in that the third wireless signal indicates a target antenna port group and a precoding matrix, the precoding matrix includes T second vectors, and the second vector includes Q elements. The T first vectors correspond to the T second vectors one by one. The target antenna port group includes Q antenna ports, and the beamforming vectors corresponding to the Q antenna ports are multiplied by the Q elements in the second vector respectively, and then added to form the corresponding first vector. The Q is a positive integer greater than 1.

[0059] As an embodiment, any two of the T second vectors are different from each other.

[0060] As an embodiment, any two of the T second vectors are orthogonal to each other.

[0061] The present invention discloses a method in a base station used for multi-antenna transmission, which comprises the following steps:

[0062] -Step A. Sending a first wireless signal;

[0063] -Step B. receiving a second wireless signal;

[0064] Wherein, the first wireless signal is used to determine P, and P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0065] As an embodiment, the first wireless signal implicitly indicates the P. As a sub-embodiment of this embodiment, the first wireless signal includes {first signaling, first data}, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded. The signaling identifier corresponding to the first signaling is used to determine the P, and the signaling identifier is a positive integer. As an embodiment, the first signaling is DCI (Downlink Control Information), the signaling identifier of the first signaling is RA (Random Access)-RNTI (Radio Network Temporary Identifier), and the P is greater than 1. As an embodiment, the first signaling is DCI, the signaling identifier of the first signaling is C (Cell)-RNTI, and the P is equal to 1.

[0066] As an embodiment, the above-mentioned scheduling information includes at least one of {occupied time-frequency resources, MCS (Modulation and Coding Status), RV (Redundancy Version), HARQ process number (Process Number)}.

[0067] As an embodiment, the first wireless signal explicitly indicates the P. As a sub-embodiment of this embodiment, an information bit in the first wireless signal indicates whether the P is 1 or P1, and the P1 is greater than 1. As an embodiment, the P1 is a fixed constant. As an embodiment, the P1 is configurable.

[0068] As an embodiment, time domain resources occupied by any two of the P sub-signals are orthogonal (ie, do not overlap in the time domain).

[0069] As an embodiment, the sub-signal includes UCI (Uplink Control Information), and the UCI includes at least one of {HARQ-ACK / NACK, SR (Scheduling Requests), CQI (Channel Quality Indicator) feedback, RI (Rank Indicator) feedback, PMI (Precoding Matrix Indicator), CRI (CSI-RS Resource Indicator)}.

[0070] As an embodiment, the physical layer channel corresponding to the first wireless signal includes a downlink physical layer control channel (ie, a downlink channel that can only be used to carry physical layer signaling). As an embodiment, the downlink physical layer control channel is a PDCCH (Physical Downlink Control Channel).

[0071] As an embodiment, the physical layer channel corresponding to the first wireless signal includes a downlink physical layer data channel (ie, a downlink channel that can be used to carry physical layer data). As an embodiment, the downlink physical layer data channel is a PDSCH (Physical Downlink Shared Channel).

[0072] As an embodiment, the transmission channel corresponding to the first wireless signal is DL-SCH (Downlink Shared Channel).

[0073] As an embodiment, the first wireless signal also includes physical layer data.

[0074] As an embodiment, the physical layer channel corresponding to the second wireless signal includes an uplink physical layer control channel (ie, an uplink channel that can only be used to carry physical layer signaling). As an embodiment, the uplink physical layer control channel is PUCCH (Physical Uplink Control Channel).

[0075] As an embodiment, the physical layer channel corresponding to the second wireless signal includes an uplink physical layer data channel (ie, an uplink channel that can be used to carry physical layer data). As an embodiment, the uplink physical layer data channel is a PUSCH (Physical Uplink Shared Channel).

[0076] As an embodiment, the transmission channel corresponding to the second wireless signal is UL-SCH (Uplink Shared Channel, uplink shared channel).

[0077] As an embodiment, the antenna port group includes 1 antenna port.

[0078] As an embodiment, at least two antenna port groups among the P antenna port groups include different numbers of antenna ports.

[0079] As an embodiment, the number of antenna ports included in the P antenna port groups is the same.

[0080] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group means that the small-scale characteristics of the wireless channel experienced by the signal sent by the first antenna port cannot be used by the receiver of the second wireless signal to infer the small-scale characteristics of the wireless channel experienced by the signal sent by the second antenna port. The first antenna port and the second antenna port belong to two different antenna port groups in the P antenna port groups, respectively, and the small-scale characteristics include channel impulse response.

[0081] As an embodiment, the antenna port is formed by superimposing multiple antennas through antenna virtualization, and the mapping coefficients of the multiple antennas to the antenna port constitute a beamforming vector. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the beamforming vectors corresponding to any two antenna ports in the P antenna port group cannot be assumed to be the same.

[0082] In the above embodiment, different antenna ports may use different beamforming vectors to send the second wireless signal, and different beamforming vectors point to different directions. When the UE has not yet obtained the CSI of the uplink channel, the base station may instruct the UE to send the second signal in different beamforming directions on P>1 antenna port groups, thereby enhancing the transmission reliability of the second wireless signal. After the UE obtains (part of) the CSI of the uplink channel, the base station may instruct the UE to send the second wireless signal through a specific beamforming vector on P=1 antenna port groups, thereby reducing transmission redundancy, improving transmission efficiency, and ensuring the transmission reliability of the second wireless signal.

[0083] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the receiver of the second wireless signal does not perform joint channel estimation using the wireless signals sent by any two antenna ports in the P antenna port groups.

[0084] As an embodiment, the beamforming vector corresponding to the antenna port is composed of the product of an analog beamforming matrix and a digital beamforming vector. As a sub-embodiment, the P antenna port groups correspond to P analog beamforming matrices respectively, and the antenna ports in the same antenna port group correspond to the same analog beamforming matrix. As a sub-embodiment, the analog beamforming matrices corresponding to the antenna ports in different antenna port groups are different. As a sub-embodiment, different antenna ports in the same antenna port group correspond to different digital beamforming vectors.

[0085] In the above embodiment, the same analog beamforming matrix corresponding to the antenna ports in the same antenna port group is used to form a same wide beam on the antenna ports in the same antenna port group; different digital beamforming vectors corresponding to the antenna ports in the same antenna port group are used to form different narrow beams within the wide beam on the antenna ports in the same antenna port group. In this way, the UE can flexibly perform beam sweeps with two different accuracies. The base station can select the wide beam by measuring the wireless signals sent by different antenna port groups; the base station can also select the narrow beam within the corresponding wide beam by measuring the wireless signals sent by different antenna ports in the same antenna port group. In this way, the base station can flexibly assist the UE in supporting beamforming with two different accuracies.

[0086] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a TDM (Timing Division Multiplexing) manner.

[0087] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a FDM (Frequency Division Multiplexing) manner.

[0088] As an embodiment, different antenna ports in the same antenna port group send the second wireless signal in a CDM (Code Division Multiplexing) manner.

[0089] As an embodiment, different antenna ports in the same antenna port group transmit the second wireless signal in a transmit diversity manner. As a sub-embodiment, the transmit diversity is SFBC (Space Frequency Block Coding). As a sub-embodiment, the transmit diversity is STBC (Space Time Block Coding).

[0090] Specifically, according to one aspect of the present invention, it is characterized in that the step A further comprises the following steps:

[0091] - Step A0. Send a first higher layer signaling, where the first higher layer signaling indicates P1.

[0092] Wherein, P is 1, or P is P1. P1 is a positive integer greater than 1.

[0093] As an embodiment, the first high-layer signaling is RRC (Radio Resource Control) signaling.

[0094] As an embodiment, the first high-layer signaling is cell-specific.

[0095] As an embodiment, the first high-layer signaling is UE-specific.

[0096] Specifically, according to one aspect of the present invention, it is characterized in that it also includes the following steps:

[0097] -Step C. sending a third wireless signal;

[0098] -Step D. receiving a fourth wireless signal;

[0099] The third wireless signal is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0100] As an embodiment, the second wireless signal includes P RS port groups, the P RS port groups correspond to the P antenna port groups respectively, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports. As an embodiment, the RS sequence corresponding to the RS port is a Zadoff-Chu sequence. As an embodiment, the RU (Resource Unit) occupied by the RS port is discontinuous in the frequency domain, the RU occupies the duration of an OFDM symbol in the time domain, and occupies the bandwidth of a subcarrier interval in the frequency domain. As an embodiment, the RU is an RE (Resource Element). As an embodiment, the frequency domain intervals between adjacent RUs occupied by the RS port are the same. As an embodiment, the RS sequences corresponding to different RS ports are different. As an embodiment, the RS sequences corresponding to different RS ports are mutually orthogonal.

[0101] As an embodiment, the pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block, the time-frequency block occupies an OFDM duration in the time domain, and the bandwidth occupied in the frequency domain does not exceed 20 MHz (megahertz). As an embodiment, the bandwidth occupied by the RS port in the frequency domain includes the bandwidths of multiple time-frequency blocks in the frequency domain.

[0102] As an embodiment, the reference signals on the P RS port groups are respectively used to determine P channel qualities, and the target antenna port group is used to determine the target channel quality, which is the maximum value of the P channel qualities.

[0103] As an embodiment, the reference signals on the P RS port groups are respectively used to determine the CSI corresponding to the P antenna port groups, and the CSI is used to determine T first vectors.

[0104] As an embodiment, the third wireless signal is transmitted on a downlink physical layer control channel. As an embodiment, the downlink physical layer control channel is a PDCCH.

[0105] As an embodiment, the third wireless signal is transmitted on a downlink physical layer data channel. As an embodiment, the downlink physical layer data channel is a PDSCH.

[0106] As an embodiment, the transmission channel corresponding to the third wireless signal is DL-SCH.

[0107] As an embodiment, the third wireless signal also includes physical layer data.

[0108] As an embodiment, the fourth wireless signal includes an uplink physical layer control channel. As an embodiment, the uplink physical layer control channel is PUCCH.

[0109] As an embodiment, the fourth wireless signal includes an uplink physical layer data channel. As an embodiment, the uplink physical layer data channel is a PUSCH.

[0110] As an embodiment, the transmission channel corresponding to the fourth wireless signal is UL-SCH.

[0111] As an embodiment, the fourth wireless signal also includes physical layer data.

[0112] Specifically, according to one aspect of the present invention, it is characterized in that the third wireless signal indicates a target antenna port group and a precoding matrix, the precoding matrix includes T second vectors, and the second vector includes Q elements. The T first vectors correspond to the T second vectors one by one. The target antenna port group includes Q antenna ports, and the beamforming vectors corresponding to the Q antenna ports are multiplied by the Q elements in the second vector respectively, and then added to form the corresponding first vector. The Q is a positive integer greater than 1.

[0113] As an embodiment, any two of the T second vectors are different from each other.

[0114] As an embodiment, any two of the T second vectors are orthogonal to each other.

[0115] The present invention discloses a user equipment used for multi-antenna transmission, which includes the following modules:

[0116] A first receiving module: used for receiving a first wireless signal;

[0117] A first sending module: used for sending a second wireless signal;

[0118] Wherein, the first wireless signal is used to determine P, and P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0119] The first receiving module is further used to receive a first high-level signaling, wherein the first high-level signaling indicates P1, wherein P is 1, or P is P1, and P1 is a positive integer greater than 1.

[0120] As an embodiment, the first wireless signal implicitly indicates the P. As a sub-embodiment of this embodiment, the first wireless signal includes {first signaling, first data}, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded. The signaling identifier corresponding to the first signaling is used to determine the P, and the signaling identifier is a positive integer. As an embodiment, the first signaling is DCI (Downlink Control Information), the signaling identifier of the first signaling is RA (Random Access)-RNTI (Radio Network Temporary Identifier), and the P is greater than 1. As an embodiment, the first signaling is DCI, the signaling identifier of the first signaling is C (Cell)-RNTI, and the P is equal to 1.

[0121] As an embodiment, the first wireless signal explicitly indicates the P. As a sub-embodiment of this embodiment, an information bit in the first wireless signal indicates whether the P is 1 or P1, and the P1 is greater than 1. As an embodiment, the P1 is a fixed constant. As an embodiment, the P1 is configurable.

[0122] As an embodiment, time domain resources occupied by any two of the P sub-signals are orthogonal (ie, do not overlap in the time domain).

[0123] As an embodiment, the sub-signal includes UCI (Uplink Control Information), and the UCI includes at least one of {HARQ-ACK / NACK, SR (Scheduling Requests), CQI (Channel Quality Indicator) feedback, RI (Rank Indicator) feedback, PMI (Precoding Matrix Indicator), CRI (CSI-RS Resource Indicator)}.

[0124] As an embodiment, the antenna port group includes 1 antenna port.

[0125] As an embodiment, at least two antenna port groups among the P antenna port groups include different numbers of antenna ports.

[0126] As an embodiment, the number of antenna ports included in the P antenna port groups is the same.

[0127] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group means that the small-scale characteristics of the wireless channel experienced by the signal sent by the first antenna port cannot be used by the receiver of the second wireless signal to infer the small-scale characteristics of the wireless channel experienced by the signal sent by the second antenna port. The first antenna port and the second antenna port belong to two different antenna port groups in the P antenna port groups, respectively, and the small-scale characteristics include channel impulse response.

[0128] As an embodiment, the antenna port is formed by superimposing multiple antennas through antenna virtualization, and the mapping coefficients of the multiple antennas to the antenna port constitute a beamforming vector. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the beamforming vectors corresponding to any two antenna ports in the P antenna port group cannot be assumed to be the same.

[0129] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the receiver of the second wireless signal does not perform joint channel estimation using the wireless signals sent by any two antenna ports in the P antenna port groups.

[0130] Specifically, the above user equipment is characterized by further comprising:

[0131] Second receiving module: used for receiving a third wireless signal;

[0132] Second sending module: used for sending a fourth wireless signal;

[0133] The third wireless signal is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0134] As an embodiment, the second wireless signal includes P RS port groups, the P RS port groups correspond to the P antenna port groups respectively, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports. The second sending module is also used to send the RS sequence corresponding to the RS port. As an embodiment, the RS sequence is a Zadoff-Chu sequence. As an embodiment, the RU (Resource Unit) occupied by the RS port is discontinuous in the frequency domain, the RU occupies the duration of an OFDM symbol in the time domain, and occupies the bandwidth of a subcarrier interval in the frequency domain. As an embodiment, the RU is an RE (Resource Element). As an embodiment, the frequency domain intervals between adjacent RUs occupied by the RS port are the same. As an embodiment, the RS sequences corresponding to different RS ports are different. As an embodiment, the RS sequences corresponding to different RS ports are mutually orthogonal.

[0135] The present invention discloses a base station device used for multi-antenna transmission, which includes the following modules:

[0136] The third sending module is used to send the first wireless signal;

[0137] The third receiving module is used to receive the second wireless signal;

[0138] Wherein, the first wireless signal is used to determine P, and P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0139] The third sending module is further used to send a first high-level signaling, wherein the first high-level signaling indicates P1, wherein P is 1, or P is P1, and P1 is a positive integer greater than 1.

[0140] As an embodiment, the first wireless signal implicitly indicates the P. As a sub-embodiment of this embodiment, the first wireless signal includes {first signaling, first data}, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded. The signaling identifier corresponding to the first signaling is used to determine the P, and the signaling identifier is a positive integer. As an embodiment, the first signaling is DCI (Downlink Control Information), the signaling identifier of the first signaling is RA (Random Access)-RNTI (Radio Network Temporary Identifier), and the P is greater than 1. As an embodiment, the first signaling is DCI, the signaling identifier of the first signaling is C (Cell)-RNTI, and the P is equal to 1.

[0141] As an embodiment, the first wireless signal explicitly indicates the P. As a sub-embodiment of this embodiment, an information bit in the first wireless signal indicates whether the P is 1 or P1, and the P1 is greater than 1. As an embodiment, the P1 is a fixed constant. As an embodiment, the P1 is configurable.

[0142] As an embodiment, time domain resources occupied by any two of the P sub-signals are orthogonal (ie, do not overlap in the time domain).

[0143] As an embodiment, the sub-signal includes UCI (Uplink Control Information), and the UCI includes at least one of {HARQ-ACK / NACK, SR (Scheduling Requests), CQI (Channel Quality Indicator) feedback, RI (Rank Indicator) feedback, PMI (Precoding Matrix Indicator), CRI (CSI-RS Resource Indicator)}.

[0144] As an embodiment, the antenna port group includes 1 antenna port.

[0145] As an embodiment, at least two antenna port groups among the P antenna port groups include different numbers of antenna ports.

[0146] As an embodiment, the number of antenna ports included in the P antenna port groups is the same.

[0147] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group means that the small-scale characteristics of the wireless channel experienced by the signal sent by the first antenna port cannot be used by the receiver of the second wireless signal to infer the small-scale characteristics of the wireless channel experienced by the signal sent by the second antenna port. The first antenna port and the second antenna port belong to two different antenna port groups in the P antenna port groups, respectively, and the small-scale characteristics include channel impulse response.

[0148] As an embodiment, the antenna port is formed by superimposing multiple antennas through antenna virtualization, and the mapping coefficients of the multiple antennas to the antenna port constitute a beamforming vector. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the beamforming vectors corresponding to any two antenna ports in the P antenna port group cannot be assumed to be the same.

[0149] As an embodiment, the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group, which means that the receiver of the second wireless signal does not perform joint channel estimation using the wireless signals sent by any two antenna ports in the P antenna port groups.

[0150] Specifically, the above base station equipment is characterized by further comprising:

[0151] The fourth sending module is used to send a third wireless signal;

[0152] The fourth receiving module is used to receive a fourth wireless signal;

[0153] The third wireless signal is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0154] As an embodiment, the second wireless signal includes P RS port groups, the P RS port groups correspond to the P antenna port groups respectively, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports. The third receiving module is also used to receive the RS sequence corresponding to the RS port. As an embodiment, the RS sequence is a Zadoff-Chu sequence. As an embodiment, the RU (Resource Unit) occupied by the RS port is discontinuous in the frequency domain, the RU occupies the duration of an OFDM symbol in the time domain, and occupies the bandwidth of a subcarrier interval in the frequency domain. As an embodiment, the RU is an RE (Resource Element). As an embodiment, the frequency domain intervals between adjacent RUs occupied by the RS port are the same. As an embodiment, the RS sequences corresponding to different RS ports are different. As an embodiment, the RS sequences corresponding to different RS ports are mutually orthogonal.

[0155] Compared with the traditional solution, the present invention has the following advantages:

[0156] -.According to the instructions of the base station, the UE flexibly adopts beamforming or beam sweeping to send uplink signals, always maintaining the robustness of uplink transmission;

[0157] -.Simultaneously supports beamforming and beam sweeping of different precisions to meet the needs of different services. BRIEF DESCRIPTION OF THE DRAWINGS

[0158] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0159] Figure 1 A flow chart showing wireless transmission according to an embodiment of the present invention is shown;

[0160] Figure 2 A schematic diagram of an antenna structure according to an embodiment of the present invention is shown;

[0161] Figure 3 A schematic diagram showing resource mapping of an antenna port group according to an embodiment of the present invention is shown;

[0162] Figure 4 A structural block diagram of a processing device used in a UE according to an embodiment of the present invention is shown;

[0163] Figure 5A structural block diagram of a processing device used in a base station according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0164] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0165] Example 1

[0166] Embodiment 1 illustrates a flow chart of wireless transmission, as shown in the attached Figure 1 Attached Figure 1 In the example, base station N1 is the base station maintaining the serving cell of UE U2. Figure 1 In the embodiment, the steps in box F1 and box F2 are respectively optional.

[0167] For N1, a first high-level signaling is sent in step S101, where the first high-level signaling indicates P1, and P1 is a positive integer greater than 1; a first wireless signal is sent in step S11; a second wireless signal is received in step S12; a third wireless signal is sent in step S102; and a fourth wireless signal is received in step S103.

[0168] For U2, a first high-level signaling is received in step S201, wherein the first high-level signaling indicates P1; a first wireless signal is received in step S21; a second wireless signal is sent in step S22; a third wireless signal is received in step S202; and a fourth wireless signal is sent in step S203.

[0169] In embodiment 1, the first wireless signal is used to determine P, where P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The sub-signal includes UCI, and the UCI includes at least one of {HARQ-ACK / NACK, SR, CQI feedback, RI feedback, PMI feedback, CRI}. The time domain resources or frequency domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0170] As a sub-embodiment 1 of embodiment 1, the first wireless signal implicitly indicates the P. The first wireless signal includes {first signaling, first data}, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded. A signaling identifier corresponding to the first signaling is used to determine the P, and the signaling identifier is a positive integer.

[0171] As a sub-embodiment of sub-embodiment 1 of embodiment 1, the first signaling is DCI, the signaling identifier of the first signaling is RA-RNTI, and P is equal to P1, wherein P1 is a fixed constant or P1 is configurable.

[0172] As a sub-embodiment of sub-embodiment 1 of embodiment 1, the first signaling is DCI, the signaling identifier of the first signaling is C-RNTI, and P is equal to 1.

[0173] As a sub-embodiment 2 of embodiment 1, the first wireless signal explicitly indicates the P. An information bit in the first wireless signal indicates whether the P is 1 or P1, and the P1 is a fixed constant or the P1 is configurable.

[0174] As a sub-embodiment 3 of embodiment 1, the antenna port is formed by superimposing multiple antennas through antenna virtualization, and the mapping coefficients of the multiple antennas to the antenna port constitute a beamforming vector. The beamforming vectors corresponding to any two antenna ports in the P antenna port groups cannot be assumed to be the same.

[0175] As a sub-embodiment of sub-embodiment 3 of embodiment 1, the P antenna port groups correspond to P analog beamforming matrices respectively, and the beamforming vector corresponding to the antenna port is composed of the product of the analog beamforming matrix and a digital beamforming vector, that is, w q,p =C p b q,p , where 1≤p≤P, w q,p represents the beamforming vector corresponding to the qth antenna port in the pth antenna port group, C p represents the analog beamforming matrix corresponding to the pth antenna port group, b q,p represents the digital beamforming vector corresponding to the qth antenna port in the pth antenna port group.

[0176] As a sub-embodiment of sub-embodiment 3 of embodiment 1, the analog beamforming matrices corresponding to different antenna port groups are different, that is, for 1≤p1≤P, 1≤p2≤P, p1≠p2, there is C p1 ≠C p2 .

[0177] As a sub-embodiment of sub-embodiment 3 of embodiment 1, the antenna ports in the same antenna port group correspond to different digital beamforming vectors, that is, b 1,p ≠b 2,p ≠…≠b Qp,p .

[0178] As a sub-embodiment 4 of embodiment 1, different antenna ports in the same antenna port group send the second wireless signal in a TDM manner.

[0179] As a sub-embodiment 5 of embodiment 1, different antenna ports in the same antenna port group send the second wireless signal in an FDM manner.

[0180] As a sub-embodiment 6 of embodiment 1, different antenna ports in the same antenna port group send the second wireless signal in a CDM manner.

[0181] As a sub-embodiment 6 of embodiment 1, different antenna ports in the same antenna port group transmit the second wireless signal in a transmit diversity manner. As a sub-embodiment, the transmit diversity is SFBC. As a sub-embodiment, the transmit diversity is STBC.

[0182] As sub-embodiment 7 of embodiment 1, the second wireless signal includes P RS port groups, the P RS port groups correspond one-to-one to the P antenna port groups respectively, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond one-to-one to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports.

[0183] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the RS sequence corresponding to the RS port is a Zadoff-Chu sequence.

[0184] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the RU occupied by the RS port is discontinuous in the frequency domain, the RU occupies the duration of an OFDM symbol in the time domain, occupies the bandwidth of a subcarrier interval in the frequency domain, and the RU is RE (Resource Element).

[0185] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the frequency domain intervals between adjacent RUs occupied by the RS ports are the same.

[0186] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the RS sequences corresponding to different RS ports are different.

[0187] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the RS sequences corresponding to different RS ports are mutually orthogonal.

[0188] As a sub-embodiment of sub-embodiment 7 of embodiment 1, the pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block, the time-frequency block occupies a duration of an OFDM in the time domain, and the bandwidth occupied in the frequency domain does not exceed 20 MHz (megahertz), and the bandwidth occupied by the RS port in the frequency domain includes the bandwidths of multiple time-frequency blocks in the frequency domain.

[0189] As a sub-embodiment 8 of embodiment 1, the third wireless signal is used to determine a target antenna port group, where the target antenna port group is one of the P antenna port groups. The target antenna port group includes Q antenna ports, where the Q antenna ports correspond to Q beamforming vectors {w 1 ,w 2 ,…,w Q The fourth wireless signal is transmitted by T antenna ports, where T is a positive integer less than or equal to Q. The Q beamforming vectors {w 1 ,w 2 ,…,w Q The T beamforming vectors in} are used for antenna virtualization of the T antenna ports. As a sub-embodiment, the T is equal to the Q.

[0190] As a sub-embodiment of sub-embodiment 8 of embodiment 1, the second wireless signal includes P RS port groups, and the P RS port groups correspond to the P antenna port groups one by one. The reference signals on the P RS port groups are used to determine P channel qualities, respectively, and the target antenna port group is used to determine a target channel quality, and the target channel quality is a maximum value among the P channel qualities.

[0191] As a sub-embodiment 9 of embodiment 1, the third wireless signal is used to determine T first vectors. The fourth wireless signal is sent by T antenna ports, wherein the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0192] As a sub-embodiment of sub-embodiment 9 of embodiment 1, the second wireless signal includes P RS port groups, the P RS port groups correspond one-to-one to the P antenna port groups respectively, the RS ports in the RS port groups correspond one-to-one to the antenna ports in the corresponding antenna port groups, and the RS ports are sent by the corresponding antenna ports. The beamforming vectors corresponding to any two of the RS ports are mutually orthogonal. The reference signals on the P RS port groups are respectively used to determine the CSI corresponding to the P antenna port groups, and the CSI is used to determine T first vectors.

[0193] As a sub-embodiment 10 of embodiment 1, the third wireless signal indicates a target antenna port group and a precoding matrix, and the precoding matrix is ​​a Q×T-dimensional matrix, represented as A. The T first vectors correspond one-to-one to the T columns of the precoding matrix A. The target antenna port group includes Q antenna ports, and the Q antenna ports correspond to Q beamforming vectors {w 1 ,w 2 ,…,w Q}. Q is a positive integer greater than 1. The Q beamforming vectors {w 1 ,w 2 ,…,w Q} are multiplied by the Q elements in the second vector respectively, and then added to form the corresponding first vector. For 1≤t≤T, the tth first vector is represented by v t , calculated by the following formula:

[0194]

[0195] where a q,t It is the qth element of the tth column of the precoding matrix A.

[0196] Example 2

[0197] Embodiment 2 illustrates a schematic diagram of an antenna structure, as shown in the attached Figure 2 Attached Figure 2 In the example, the communication node is equipped with G antenna groups, and the G antenna groups correspond to G RF (Radio Frequency) chains. An antenna group includes V antennas, where G is a positive integer and V is a positive integer. For 1≤g≤G, the antennas in antenna group #g include the following: Figure 2 {Ant g_1,Ant g_2,…,Ant g_V} in the antenna group #g is simulated by the beamforming vector c g Perform simulated beamforming, where c g is a V×1 dimensional vector. Figure 2 x in 1 ,...x Q is a useful signal to be transmitted, and the useful signal is transmitted after being subjected to digital beamforming and analog beamforming. The baseband processor is used to 1 ,...x Q Perform digital beamforming, the analog beamforming vector is used to perform analog beamforming on the output of the baseband processor. Denote the digital beamforming matrix by B, where B is a G×Q dimensional matrix. The qth (1≤q≤Q)th beamforming vector corresponding to antenna group #g is the qth column b of the digital beamforming matrix B.q The g-th element of and the simulated beamforming vector c corresponding to antenna group #g g The product of q,g c g , where b q,g is the g-th element of the q-th column of the digital beamforming matrix B.

[0198] As a sub-embodiment 1 of embodiment 2, the G antenna groups are divided into P groups that do not overlap each other, and the P groups are respectively mapped to P antenna port groups. The number of antenna groups included in the pth antenna port group is G p The antenna groups included in the pth antenna port group are labeled The qth (1≤q≤Q)th digital beamforming vector corresponding to the pth (1≤p≤P)th antenna port group is represented by the b q Elements Composition, expressed as where b q,p is the qth digital beamforming vector corresponding to the pth antenna port group, and the symbol “T” represents transposition. p The digital beamforming vectors corresponding to the antenna ports are the Q digital beamforming vectors {b 1,p ,b 2,p …b Q,p Q in} p Among them, Q p is a positive integer less than or equal to Q.

[0199] As a sub-embodiment of sub-embodiment 1 of embodiment 2, different antenna groups included in the same antenna port group use the same analog beamforming vector, that is, The antenna groups included in different antenna port groups use different simulated beamforming vectors, that is, for 1≤p1≤P, 1≤p2≤P, p1≠p2, there are c p1 ≠c p2 The qth (1≤q≤Q p The complete beamforming vector w on the antenna ports q,p The simulated beamforming matrix C corresponding to the pth antenna port group p and the qth digital beamforming vector b q,p The product of q,p =C p b q,p , where the simulated beamforming matrix C p It is a G p V×G p dimensional matrix, the C p By Gp The c p Diagonally arranged, that is

[0200] As a sub-embodiment of sub-embodiment 1 of embodiment 2, antenna groups in different antenna port groups use different analog beamforming vectors.

[0201] As a sub-embodiment of sub-embodiment 1 of embodiment 2, the analog beamforming vectors used by antenna groups in different antenna port groups are orthogonal to each other.

[0202] As a sub-embodiment of sub-embodiment 1 of embodiment 2, different antenna ports in the antenna port group correspond to different digital beamforming vectors.

[0203] As a sub-embodiment of sub-embodiment 1 of embodiment 2, digital beamforming vectors corresponding to different antenna ports in the antenna port group are orthogonal to each other.

[0204] As a sub-embodiment of sub-embodiment 1 of embodiment 2, the number of antenna groups included in all the antenna port groups is the same.

[0205] As a sub-embodiment of sub-embodiment 1 of embodiment 2, at least two of the antenna port groups include different numbers of antenna ports.

[0206] Example 3

[0207] Embodiment 3 illustrates a schematic diagram of resource mapping of the RS port group, as shown in the attached Figure 3 Attached Figure 3 In the embodiment, one of the RS port groups occupies I consecutive OFDM symbols in the time domain and occupies a part of the system bandwidth in the frequency domain. Different antenna port groups occupy different I OFDM symbols in the time domain. The P RS port groups correspond to the P antenna port groups one by one, the number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group, the RS ports in the RS port group correspond to the antenna ports in the corresponding antenna port group one by one, and the RS ports are sent by the corresponding antenna ports.

[0208] As sub-embodiment 1 of embodiment 3, different RS ports of one RS port group occupy different subcarriers in the frequency domain.

[0209] As a sub-embodiment of sub-embodiment 1 of embodiment 3, the subcarriers occupied by different RS ports of one RS port group in the frequency domain are discontinuous.

[0210] As a sub-embodiment of sub-embodiment 1 of embodiment 3, the frequency domain intervals between adjacent subcarriers occupied by different RS ports of one RS port group in the frequency domain are the same.

[0211] As a sub-embodiment of sub-embodiment 1 of embodiment 3, different RS ports of an RS port group appear at equal intervals in the frequency domain.

[0212] As a sub-embodiment of sub-embodiment 1 of embodiment 3, one of the RS ports is broadband (i.e., the system bandwidth is divided into a positive integer number of frequency domain units, an RS port group appears on all frequency domain units within the system bandwidth, and the bandwidth corresponding to the frequency domain unit is equal to the difference between the frequencies of the subcarriers appearing twice adjacently on an RS port).

[0213] As a sub-embodiment 2 of embodiment 3, different RS ports of an RS port group occupy the same subcarrier in the frequency domain, and the different RS ports correspond to different RS sequences.

[0214] As a sub-embodiment of sub-embodiment 2 of embodiment 3, the RS sequence is a Zadoff-Chu sequence.

[0215] As a sub-embodiment of sub-embodiment 2 of embodiment 3, RS sequences corresponding to different RS ports of one RS port group are orthogonal to each other.

[0216] As sub-example 3 of example 3, I is equal to 1.

[0217] As sub-example 4 of example 3, I is equal to 2.

[0218] Example 4

[0219] Embodiment 4 is a structural block diagram of a processing device used in a UE, as shown in the attached Figure 4 Attached Figure 4 In the embodiment, the UE device 200 is mainly composed of a first receiving module 201, a first sending module 202, a second receiving module 203 and a second sending module 204. The second receiving module 203 and the second sending module 204 are optional.

[0220] The first receiving module 201 is used to receive a first wireless signal; the first sending module 202 is used to send a second wireless signal; the second receiving module 203 is used to receive a third wireless signal; and the second sending module 204 is used to send a fourth wireless signal.

[0221] In Embodiment 4, the first wireless signal is used to determine P, where P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0222] In the fourth embodiment, the first receiving module is further used to receive a first high-level signaling, and the first high-level signaling indicates P1, wherein P is 1, or P is P1, and P1 is a positive integer greater than 1.

[0223] The third wireless signal in Embodiment 4 is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0224] Example 5

[0225] Embodiment 5 is a structural block diagram of a processing device used in a base station, as shown in the attached Figure 5 Attached Figure 5 In the embodiment, the base station device 300 is mainly composed of a third sending module 301, a third receiving module 302, a fourth sending module 303 and a fourth receiving module 304. The fourth sending module 303 and the fourth receiving module 304 are optional.

[0226] The third sending module 301 is used to send a first wireless signal; the third receiving module 302 is used to receive a second wireless signal; the fourth sending module 303 is used to send a third wireless signal; and the fourth receiving module 304 is used to receive a fourth wireless signal.

[0227] In Embodiment 5, the first wireless signal is used to determine P, where P is a positive integer. The second wireless signal includes P sub-signals, and the P sub-signals carry the same information. The time domain resources occupied by any two of the P sub-signals are orthogonal. The P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes one or more antenna ports. The receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group.

[0228] The third sending module in Embodiment 5 is further used to send a first high-level signaling, where the first high-level signaling indicates P1, where P is 1, or P is P1, where P1 is a positive integer greater than 1.

[0229] The third wireless signal in Embodiment 5 is used to determine at least one of {target antenna port group, T first vectors}. The target antenna port group is one of the P antenna port groups, and the fourth wireless signal is sent by T antenna ports, wherein the target antenna port group is used for antenna virtualization of the T antenna ports, or the T first vectors are respectively used for antenna virtualization of the T antenna ports. T is a positive integer.

[0230] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module, and the present application is not limited to any specific form of combination of software and hardware. The UE in the present invention includes but is not limited to mobile phones, tablet computers, notebooks, Internet cards, NB-IOT terminals, eMTC terminals and other wireless communication devices. The base station or system equipment in the present invention includes but is not limited to macrocellular base stations, microcellular base stations, home base stations, relay base stations and other wireless communication equipment.

[0231] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. 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 for multi-antenna transmission, wherein: The steps include: -Step A. receiving a first wireless signal; -Step B. sending a second wireless signal; The first wireless signal is used to determine P, where P is a positive integer; the second wireless signal includes P sub-signals, and the P sub-signals carry the same information; time domain resources occupied by any two of the P sub-signals are orthogonal; the P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes 1 antenna port; the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group; The physical layer channel corresponding to the second wireless signal includes a PUCCH (physical uplink control channel); or, The second wireless signal includes P RS port groups, and the P RS port groups correspond one-to-one to the P antenna port groups respectively. The number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group. The RS ports in the RS port group correspond one-to-one to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports.

2. The method according to claim 1, characterized in that The pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block. The time-frequency block occupies a duration of an OFDM in the time domain and a bandwidth of no more than 20 MHz in the frequency domain.

3. The method according to claim 2, characterized in that The first wireless signal implicitly indicates the P, the first wireless signal includes a first signaling and a first data, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded; the first signaling is DCI (downlink control information).

4. The method according to any one of claims 1 to 3, characterized in that: The P antenna port groups correspond to P simulated beamforming matrices respectively. The antenna ports in the same antenna port group correspond to the same simulated beamforming matrix, and the simulated beamforming matrices corresponding to the antenna ports in different antenna port groups are different.

5. The method according to any one of claims 1 to 4, characterized in that: The step A also includes the following steps: -Step A0. Receive a first high-level signaling, wherein the first high-level signaling indicates P1; Among them, the P is the P1; the P1 is a positive integer greater than 1; and the first high-layer signaling is UE-specific.

6. The method according to any one of claims 1 to 4, characterized in that: include: -Step C. receiving a third wireless signal; -Step D. sending a fourth wireless signal; The third wireless signal is used to determine the target antenna port group; the target antenna port group is one of the P antenna port groups, the fourth wireless signal is sent by T antenna ports, and the target antenna port group is used for antenna virtualization of the T antenna ports; T is a positive integer.

7. A method in a base station for multi-antenna transmission, wherein: The steps include: -Step A. Sending a first wireless signal; -Step B. receiving a second wireless signal; The first wireless signal is used to determine P, where P is a positive integer; the second wireless signal includes P sub-signals, and the P sub-signals carry the same information; time domain resources occupied by any two of the P sub-signals are orthogonal; the P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes 1 antenna port; the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group; The physical layer channel corresponding to the second wireless signal includes a PUCCH (physical uplink control channel); or, The second wireless signal includes P RS port groups, and the P RS port groups correspond one-to-one to the P antenna port groups respectively. The number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group. The RS ports in the RS port group correspond one-to-one to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports.

8. The method according to claim 7, characterized in that The pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block. The time-frequency block occupies a duration of an OFDM in the time domain and a bandwidth of no more than 20 MHz in the frequency domain.

9. The method according to claim 8, characterized in that The first wireless signal implicitly indicates the P, the first wireless signal includes a first signaling and a first data, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded; the first signaling is DCI (downlink control information).

10. The method according to any one of claims 7 to 9, characterized in that The P antenna port groups correspond to P simulated beamforming matrices respectively. The antenna ports in the same antenna port group correspond to the same simulated beamforming matrix, and the simulated beamforming matrices corresponding to the antenna ports in different antenna port groups are different.

11. The method according to any one of claims 7 to 10, characterized in that: The step A also includes the following steps: -Step A0. Sending a first high-level signaling, wherein the first high-level signaling indicates P1; Among them, the P is the P1; the P1 is a positive integer greater than 1; and the first high-layer signaling is UE-specific.

12. The method according to any one of claims 7 to 10, characterized in that include: -Step C. sending a third wireless signal; -Step D. receiving a fourth wireless signal; The third wireless signal is used to determine the target antenna port group; the target antenna port group is one of the P antenna port groups, the fourth wireless signal is sent by T antenna ports, and the target antenna port group is used for antenna virtualization of the T antenna ports; T is a positive integer.

13. A user equipment used for multi-antenna transmission, wherein: Includes the following modules: A first receiving module: used for receiving a first wireless signal; A first sending module: used for sending a second wireless signal; The first wireless signal is used to determine P, where P is a positive integer; the second wireless signal includes P sub-signals, and the P sub-signals carry the same information; time domain resources occupied by any two of the P sub-signals are orthogonal; the P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes 1 antenna port; the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group; The physical layer channel corresponding to the second wireless signal includes a PUCCH (physical uplink control channel); or, The second wireless signal includes P RS port groups, and the P RS port groups correspond one-to-one to the P antenna port groups respectively. The number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group. The RS ports in the RS port group correspond one-to-one to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports.

14. The user equipment according to claim 13, characterized in that The pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block. The time-frequency block occupies a duration of an OFDM in the time domain and a bandwidth of no more than 20 MHz in the frequency domain.

15. The user equipment according to claim 14, characterized in that: The first wireless signal implicitly indicates the P, the first wireless signal includes a first signaling and a first data, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded; the first signaling is DCI (downlink control information).

16. The user equipment according to any one of claims 13 to 15, characterized in that: The P antenna port groups correspond to P simulated beamforming matrices respectively. The antenna ports in the same antenna port group correspond to the same simulated beamforming matrix, and the simulated beamforming matrices corresponding to the antenna ports in different antenna port groups are different.

17. The user equipment according to any one of claims 13 to 16, characterized in that: The first receiving module receives a first high-level signaling, where the first high-level signaling indicates P1; Among them, the P is the P1; the P1 is a positive integer greater than 1; and the first high-layer signaling is UE-specific.

18. The user equipment according to any one of claims 13 to 16, characterized in that: include: A second receiving module receives a third wireless signal; A second sending module, sending a fourth wireless signal; The third wireless signal is used to determine the target antenna port group; the target antenna port group is one of the P antenna port groups, the fourth wireless signal is sent by T antenna ports, and the target antenna port group is used for antenna virtualization of the T antenna ports; T is a positive integer.

19. A base station device used for multi-antenna transmission, wherein: Includes the following modules: The third sending module is used to send the first wireless signal; The third receiving module is used to receive the second wireless signal; The first wireless signal is used to determine P, where P is a positive integer; the second wireless signal includes P sub-signals, and the P sub-signals carry the same information; the time domain resources occupied by any two of the P sub-signals are orthogonal; the P sub-signals are respectively sent by P antenna port groups, and the antenna port group includes 1; the receiver of the second wireless signal cannot assume that the P sub-signals are sent by the same antenna port group; The physical layer channel corresponding to the second wireless signal includes a PUCCH (physical uplink control channel); or, The second wireless signal includes P RS port groups, and the P RS port groups correspond one-to-one to the P antenna port groups respectively. The number of RS ports in the RS port group is the same as the number of antenna ports in the corresponding antenna port group. The RS ports in the RS port group correspond one-to-one to the antenna ports in the corresponding antenna port group, and the RS ports are sent by the corresponding antenna ports.

20. The base station device according to claim 19, characterized in that: The pattern of the RS port within a time-frequency block is the pattern of the SRS within a time-frequency block. The time-frequency block occupies a duration of an OFDM in the time domain and a bandwidth of no more than 20 MHz in the frequency domain.

21. The base station device according to claim 20, characterized in that: The first wireless signal implicitly indicates the P, the first wireless signal includes a first signaling and a first data, the first signaling includes scheduling information of the first data, and the sub-signal indicates whether the first data is correctly decoded; the first signaling is DCI (downlink control information).

22. The base station device according to any one of claims 19 to 20, characterized in that: The P antenna port groups correspond to P simulated beamforming matrices respectively. The antenna ports in the same antenna port group correspond to the same simulated beamforming matrix, and the simulated beamforming matrices corresponding to the antenna ports in different antenna port groups are different.

23. The base station device according to any one of claims 19 to 22, characterized in that: The third sending module sends a first high-level signaling, where the first high-level signaling indicates P1; Among them, the P is the P1; the P1 is a positive integer greater than 1; and the first high-layer signaling is UE-specific.

24. The base station device according to any one of claims 19 to 22, characterized in that: include: A fourth sending module, sending a third wireless signal; A fourth receiving module, receiving a fourth wireless signal; The third wireless signal is used to determine the target antenna port group; the target antenna port group is one of the P antenna port groups, the fourth wireless signal is sent by T antenna ports, and the target antenna port group is used for antenna virtualization of the T antenna ports; T is a positive integer.

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