CN108242944B - Method and device for UE (user equipment) and base station for multi-antenna transmission - Google Patents
Method and device for UE (user equipment) and base station for multi-antenna transmission Download PDFInfo
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- CN108242944B CN108242944B CN201611219760.7A CN201611219760A CN108242944B CN 108242944 B CN108242944 B CN 108242944B CN 201611219760 A CN201611219760 A CN 201611219760A CN 108242944 B CN108242944 B CN 108242944B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Abstract
The invention discloses a method and a device for UE (user equipment) and a base station for multi-antenna transmission. The UE sequentially receives the first signaling, receives the first wireless signal and sends first information. Wherein the first signaling is used to determine at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold. The invention supports UE to inform the service base station whether to switch beams or report related beams according to measurement, and the service base station can reduce the frequent reporting of the UE by setting a target threshold value, thereby reducing the air interface resources and electric energy occupied by the reporting of beam information by the UE.
Description
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), hybrid beamforming combining analog beamforming and digital precoding (hybrid beamforming) becomes an important research direction for NR (New Radio technology) systems.
In a large-scale MIMO system, a base station may determine a beam serving the UE through reporting of the UE, but mobility of the UE may cause the base station to need to switch the beam serving the UE according to reporting of the UE, and frequent reporting of the UE not only occupies air interface resources but also consumes power, and frequent switching of the base station may also bring operation burden of the system.
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 at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the method has the advantages that the UE is supported to notify the serving base station whether the beam switching or the related reporting is needed according to the measurement, and the serving base station can reduce the frequent reporting of the UE by setting the target threshold, thereby reducing the air interface resources and the electric energy occupied by the UE for reporting the beam information.
As one embodiment, the beam switching is analog beam switching.
As an embodiment, the antenna port is formed by overlapping a plurality of physical antennas through antenna Virtualization (Virtualization). And the mapping coefficients of the antenna ports to the plurality of physical antennas form a beam forming vector which is used for virtualizing the antennas to form beams.
As one embodiment, the antenna virtualization includes analog beamforming and digital beamforming. The analog beamforming is a mapping of RF link outputs to the plurality of physical antennas, used to form analog beams. The digital beamforming is a mapping of the antenna ports to RF chains, which is used to form digital beams.
As an example, the beamforming vector is a product of an analog beamforming matrix and a digital beamforming vector. The analog beamforming matrix is comprised of one or more analog beamforming vectors.
As an example, the beamforming vector is a Kronecker product of an analog beamforming vector and a digital beamforming vector.
As one embodiment, the antenna virtualization includes only analog beamforming.
As an embodiment, the antenna port group is composed of one antenna port.
As an embodiment, the antenna port group is composed of a plurality of the antenna ports.
In one implementation, the same analog beamforming vector and different digital beamforming vectors are used for antenna virtualization of different antenna ports within the antenna port group.
As an embodiment, there are two antenna port groups in the K antenna port groups, and the number of the antenna ports included in the two antenna port groups is different.
As an embodiment, the antenna port corresponds to a reference signal. The reference signal is transmitted through the antenna port.
As an embodiment, the reference signal is a reference symbol.
As one embodiment, the reference signal is composed of a plurality of reference symbols. One reference symbol occupies one RE (RE).
As an example, the reference Signal is SS (Synchronization Signal).
As an embodiment, the reference Signal is PSS (Primary Synchronization Signal).
As an embodiment, the reference Signal is SSS (second Synchronization Signal).
As an embodiment, the Reference Signal is a CSI-RS (Channel State Information Reference Signal).
As an embodiment, the Reference Signal is a DMRS (Demodulation Reference Signal).
As an embodiment, the reference signal is a DMRS of a PBCH (Physical Broadcast Channel).
As an embodiment, the reference signal is a DMRS of a PDSCH (Physical Downlink shared Channel).
As one embodiment, the first wireless signal is a plurality of multicarrier symbols.
As an example, the first wireless signal is an SS burst. The SS burst includes a plurality of SS blocks. The SS block includes at least one synchronization signal.
As an embodiment, the first wireless signal is a CSI-RS burst.
As one embodiment, the first wireless signal is a beam sweep (beam sweep). The beam scanning is an operation of covering a spatial region by a transmitted or received beam in a predetermined manner for a period of time.
As an embodiment, the K antenna port groups respectively correspond to K reference signal groups, the K reference signal groups are respectively sent through the K antenna port groups, and the first wireless signal is composed of the K reference signal groups.
As an embodiment, K different analog beamforming vectors are used for analog beamforming of the K antenna port groups.
As an embodiment, the time-frequency pattern and the OCC (Orthogonal Cover Code) of at least two of the K reference signal groups in a time unit are the same. The two reference signals are transmitted on different time resources.
As one embodiment, the time cell is a symbol.
As one embodiment, the time unit is a time slot.
As one embodiment, the time unit is a subframe (subframe).
As an embodiment, the Time unit is sTTI (short Transmission Time Interval).
For one embodiment, a first analog beamforming vector is used for analog beamforming of the target antenna port.
As an embodiment, the first analog beamforming vector is also used for analog beamforming of downlink data transmission of the UE.
As one embodiment, the first analog beamforming vector is used for analog beamforming of the first signaling.
For one embodiment, the time resource occupied by the third wireless signal is prior to the time resource occupied by the first wireless signal, and T1 antenna port groups are used for transmitting the third wireless signal. The first antenna port group is one of the T1 antenna port groups. The first analog beamforming vector is used for analog beamforming of the first antenna port group. The UE transmits fifth information to a sender of the first wireless signal. The fifth information is used to indicate the first antenna port group.
As one example, the T1 is equal to the K.
As an embodiment, the relative position of the time-frequency resource occupied by the target antenna port group in the first wireless signal is the same as the relative position of the time-frequency resource occupied by the first antenna port group in the third wireless signal.
As an embodiment, the first signaling explicitly indicates the target antenna port group.
As an embodiment, the first signaling implicitly indicates the target antenna port group.
As an embodiment, the first signaling explicitly indicates the target threshold.
As an embodiment, the first signaling implicitly indicates the target threshold.
As an embodiment, the first signaling is higher layer signaling.
As an embodiment, the first signaling is RRC (Radio Resource Control) signaling.
As an embodiment, the first signaling is MAC layer signaling.
As an embodiment, the first signaling is MAC CE (MAC Control Element, MAC Control particle).
As an embodiment, the first signaling is physical layer signaling.
As an embodiment, the first signaling is carried by a PDCCH (Physical Downlink Control Channel).
As an embodiment, the first signaling is dci (downlink Control information).
As an embodiment, different parts of the first signalling are sent in different messages.
As an embodiment, the first signaling is divided into a first part and a second part, the first part is carried by higher layer signaling, and the second part is carried by physical layer signaling.
As an embodiment, the part of the first signaling used for determining the target threshold is the first part, and the part of the first signaling used for determining the target antenna port group is the second part.
As an embodiment, the first signaling is divided into a first part and a second part, the first part is carried by higher layer signaling, and the second part is carried by MAC layer signaling.
As an embodiment, the first signaling is divided into a first part and a second part, the first part being carried by MAC signaling and the second part being carried by physical layer signaling.
As an embodiment, the part of the first signaling used for determining the target threshold is sent in system information.
As an embodiment, the first signaling is cell-common.
As an embodiment, the first signaling is UE specific.
As an embodiment, the first signaling is UE group specific.
As one embodiment, the target threshold is equal to 0.
As one embodiment, the target threshold is greater than 0.
As an embodiment, the target threshold is predetermined, and the target antenna port group is notified by a base station.
As an embodiment, the target threshold is notified by a base station, and the target antenna port group is predetermined by the UE.
As an embodiment, the target threshold and the target antenna port group are both informed by a base station.
As an embodiment, the channel quality value is one of { RSRP (Reference Signal Received Power), SINR, SNR }.
For one embodiment, the first information explicitly indicates whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
For one embodiment, the first information implicitly indicates whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the first information is carried by a PUSCH (Physical Uplink Shared Channel).
As an embodiment, the first information is carried by a PUCCH (Physical Uplink Control Channel).
As an embodiment, the first information is sent in a CSI report.
As an embodiment, the first information is a Scheduling Request (SR).
As an embodiment, the first information is an information bit in a message.
As an embodiment, when the information bit is equal to 1, it indicates that there is a channel quality value greater than the sum of the target channel quality plus the target threshold among the K channel quality values, and when the information bit is equal to 0, it indicates that there is no channel quality value greater than the sum of the target channel quality plus the target threshold among the K channel quality values.
As an embodiment, the first Information is an Information bit in a UCI (Uplink Control Information) format.
In one implementation, the first information is carried by a Random Access Channel (RACH).
As an embodiment, the first information is a random access request.
As an embodiment, the first information is a signature sequence.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. sending the second information;
wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the above method has a benefit that the base station can determine the good quality beam through the second information.
As an embodiment, the second information is carried by a PUSCH;
as an embodiment, the second information is carried by a PUCCH;
as an embodiment, the second information and the first information are in one message;
as an embodiment, the second information and the first information are in different messages;
as an example, K1 is equal to 1.
As one example, the K1 is greater than 1.
For one embodiment, the number of channel quality values of the K channel quality values greater than the sum of the first channel quality plus the target threshold is T1, the K1 is equal to the T1.
For one embodiment, the number of channel quality values of the K channel quality values greater than the sum of the first channel quality plus the target threshold is T1, the K1 is less than the T1.
As one embodiment, the K1 channel quality values are the largest K1 of the T1 channel quality values.
As an embodiment, the first signaling is used to determine the K1.
As an embodiment, the first signaling explicitly indicates the K1.
As an embodiment, the first signaling implicitly indicates the K1.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step e. receiving a second wireless signal;
-step f. sending a third information;
wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As an embodiment, the above method has the advantage that the UE performs the second measurement on the candidate beam, which ensures the robustness of the best beam to some extent, or performs further optimization on the beam.
As one embodiment, the second wireless signal is a beam sweep.
As an example, the second wireless signal is an SS burst.
As an embodiment, the second radio signal is a CSI-RS burst.
As one example, the K2 is equal to the K.
As one embodiment, the K2 is not equal to the K.
As an embodiment, beamforming vectors for the K antenna port groups are used for beamforming of the K2 antenna port groups.
As an embodiment, beamforming vectors for the K1 antenna port groups are used for beamforming of the K2 antenna port groups.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step g. receiving a second signaling;
wherein the first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As an embodiment, the method has the advantage that the reporting of the beam information used by the UE for beam switching is controlled by the base station, which increases the scheduling flexibility of the base station.
As an embodiment, when it is determined through the first information that there is a channel quality value greater than the sum of the target channel quality and the target threshold among the K channel quality values, the base station sends the second signaling.
As an embodiment, the base station sends the second signaling when the first condition and the second condition are both met. Wherein the first condition is that a channel quality value greater than the sum of the target channel quality plus the target threshold exists in the K channel quality values determined by the first information. The second condition is that the base station can report the beam information related to the beam switching according to the judgment of the network condition.
As an embodiment, the second signaling is higher layer signaling.
As an embodiment, the second signaling is MAC layer signaling.
As an embodiment, the second signaling is a MAC CE.
As an embodiment, the second signaling is physical layer signaling.
As an embodiment, the second signaling is carried by a PDCCH.
As one embodiment, the second signaling is carried by a PDSCH.
As an embodiment, the second signaling is DCI.
As an embodiment, the second signaling is a CSI reporting request in one DCI.
As an embodiment, the second signaling is further used to determine at least one of the frequency domain resources occupied by the second information { MCS, HARQ process number, RV, NDI, transmit antenna port }.
As an embodiment, the second signaling explicitly indicates at least one of the second information { occupied frequency domain resource, MCS, HARQ process number, RV, NDI, transmit antenna port }.
As an embodiment, the second signaling implicitly indicates at least one of the second information { occupied frequency domain resource, MCS, HARQ process number, RV, NDI, transmit antenna port }.
As an embodiment, the second signaling is further used to determine at least one of the frequency domain resources occupied by the third information { MCS, HARQ process number, RV, NDI, transmit antenna port }.
As an embodiment, the second signaling explicitly indicates at least one of the third information { occupied frequency domain resource, MCS, HARQ process number, RV, NDI, transmit antenna port }.
As an embodiment, the second signaling implicitly indicates at least one of the third information { occupied frequency domain resource, MCS, HARQ process number, RV, NDI, transmit antenna port }.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step h. sending a fourth information;
wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
As an embodiment, the above method has a benefit that the base station can increase the scheduling flexibility by obtaining more channel quality information.
As an embodiment, the fourth information explicitly indicates the K1 channel quality values.
As one embodiment, the fourth information implicitly indicates the K1 channel quality values.
As an embodiment, the fourth information explicitly indicates the K3 channel quality values.
As one embodiment, the fourth information implicitly indicates the K3 channel quality values.
The invention discloses a method for a base station for 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 at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the first signaling is UE-specific signaling.
As one embodiment, the first wireless signal is cell common.
As an embodiment, the first wireless signal is UE-specific.
As an embodiment, the first wireless signal is UE group specific.
As one embodiment, transmit analog beamforming for the target antenna port group is used for transmit analog beamforming of the first signaling.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step d. receiving second information;
wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As one embodiment, the second information is included in an aperiodic CSI report.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step e. transmitting a second wireless signal;
-step f. receiving third information;
wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As one embodiment, the second wireless signal is cell common.
As an embodiment, the second radio signal is UE specific.
As one embodiment, the second wireless signal is UE group specific
As an embodiment, the third information is included in an aperiodic CSI report.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step g. sending a second signaling;
wherein the first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As an embodiment, the base station sends the second signaling according to the first information and the current network condition.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-step h. receiving fourth information;
wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
As an embodiment, the fourth information is used by the base station for multi-user MIMO scheduling.
As an embodiment, the fourth information is used by the base station for beam grouping.
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 sending the first information;
wherein the first signaling is used to determine at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the above user equipment is characterized in that the third sending module is further configured to send the second information. Wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the above user equipment is characterized in that the second receiving module is further configured to receive a second wireless signal, and the third sending module is further configured to send third information. Wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As an embodiment, the above user equipment is characterized in that the first receiving module is further configured to receive a second signaling. The first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As an embodiment, the above user equipment is characterized in that the third sending module is further configured to send fourth information. Wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
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;
wherein the first signaling is used to determine at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the base station device is characterized in that the third receiving module is further configured to receive second information. Wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As an embodiment, the base station device is characterized in that the second sending module is further configured to send a second wireless signal, and the third receiving module is further configured to receive third information. Wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As an embodiment, the base station device is characterized in that the first sending module is further configured to send a second signaling. Wherein the first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As an embodiment, the base station device is characterized in that the third receiving module is further configured to receive fourth information. Wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
Compared with the traditional scheme, the invention has the following advantages:
saving air interface overhead for beam information reporting for beam switching;
saving power used by the UE for reporting beam information;
the base station may control the reporting frequency by setting a target threshold;
multiple reports ensure the robustness of beam switching;
the reporting of beam information for beam switching is controlled by the base station, thereby increasing the flexibility of the base station in scheduling the reporting of beam information.
Multiple candidate antenna ports and reporting of channel quality values further increases the flexibility of base station scheduling.
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 schematic diagram of analog beamforming of K sets of reference signals according to an embodiment of the invention.
FIG. 3 is a timing diagram of K reference signal groups according to one embodiment of the invention.
Fig. 4 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;
fig. 5 shows a block diagram of a processing device used in a base station according to an embodiment of the present invention.
Example 1
For N1, send the first signaling in step S11; transmitting a first wireless signal in step S12; receiving the first information in step S13; transmitting second signaling in step 14; receiving second information in step S15; transmitting a second wireless signal in step S16; receiving third information in step S17; the fourth information is received in step S18.
For U2, receiving first signaling in step S21; receiving a first wireless signal in step S22; transmitting the first information in step S23; receiving a second signaling in step S24; transmitting the second information in step S25; receiving a second wireless signal in step S26; transmitting third information in step S27; the fourth information is transmitted in step S28.
In embodiment 1, the first signaling is used by U2 to determine at least one of { target antenna port group, target threshold }. The K antenna port groups are used by N1 to transmit the first wireless signal. All antenna ports in the K antenna port groups are used by N1 for the same serving cell, or all antenna ports in the K antenna port groups are used by N1 for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used by N1 to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 1 of embodiment 1, the K antenna port groups correspond to K reference signal groups, reference signals in the reference signal groups are wideband reference signals, and the channel quality value is an instantaneous wideband RSRP.
As sub-embodiment 2 of embodiment 1, the second information is used by N1 to determine K1 of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 3 of embodiment 1, the first information is one SR, and U2 transmits the first information and the second information on a PUCCH.
As sub-embodiment 4 of embodiment 1, the target threshold is greater than 0, the first information is sent in a CSI report (CSI report), N1 determines, from the first information, that there is a channel quality value greater than the sum of the target channel quality plus the target threshold among the K channel quality values, and then uses the content in the CSI report as the second information for beam switching. The CSI report is at least one of { periodic CSI report, aperiodic CSI report }.
As sub-embodiment 5 of embodiment 1, the first information is one information bit in a CSI report. The information bit equal to 0 indicates that no channel quality value greater than the sum of the target channel quality plus the target threshold exists among the K channel quality values; the information bit equal to 1 indicates that there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 6 of embodiment 1, the first information is used by N1 to trigger the sending of the second signaling. The second signaling is used by U2 to trigger the sending of the second information.
As sub-embodiment 7 of embodiment 1, N1 uses beamforming vectors corresponding to T1 antenna port groups of the K1 antenna port groups for beamforming of subsequent transmissions after sequentially receiving { the first information, the second information }. The T1 is a positive integer.
As a sub-embodiment 8 of embodiment 1, the first information is an SR, the second signaling is a CSI request (CSI request) in DCI invoking a PUSCH, and U2 transmits at least one of { the second information, the third information, and the fourth information } on a PUSCH after receiving the second signaling transmitted by N1.
As sub-embodiment 9 of embodiment 1, the first information is a signature sequence, the UE initiates a Random Access request, and transmits the signature sequence on the RACH, and after receiving the signature sequence, the N1 transmits the second signaling through a corresponding RAR (Random Access Response).
As sub-embodiment 10 of embodiment 1, a K2 antenna port group is used by N1 to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used by N1 to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As sub-embodiment 11 of embodiment 1, the first information is used by N1 to trigger the sending of the second signaling. The second signaling is used by U2 to trigger the sending of the third information.
As sub-embodiment 12 of embodiment 1, the K2 is equal to the K, the beamforming vectors corresponding to the K antenna port groups are used for beamforming of the K2 antenna port groups, and N1 uses the beamforming vectors corresponding to T1 antenna port groups of the K3 antenna port groups for beamforming of subsequent transmissions after sequentially receiving { the first information, the third information }. The T1 is a positive integer.
As sub-embodiment 13 of embodiment 1, the fourth information is used by N1 to determine at least one of the K1 channel quality values, the K3 channel quality values.
As a sub-embodiment 14 of embodiment 1, N1 performs beam switching after receiving at least one of { the second information, the third information, the fourth information }.
As sub-embodiment 10 of embodiment 1, after receiving the fourth information, the N1 selects, for CSI reports of a plurality of UEs, beamforming vectors corresponding to T1 antenna port groups from at least one of the K1 antenna port groups and the K3 antenna port groups for beamforming for subsequent transmission.
Example 2
Example 2 illustrates a schematic diagram of analog beamforming of K sets of reference signals, as shown in fig. 2.
In embodiment 2, the K reference signal groups and the K antenna port groups correspond one to one. The number of reference signals in the reference signal group is equal to the number of antenna ports in the corresponding antenna port group.
In embodiment 2, a physical antenna corresponding to one antenna port is divided into S antenna groups, and each of the antenna groups includes a plurality of antennas. And S is a positive integer. The antenna port is formed by overlapping a plurality of antennas in S antenna groups through antenna Virtualization (Virtualization), and mapping coefficients from the plurality of antennas in the S antenna groups to the antenna port form a beam forming vector. One of the antenna groups is connected to the baseband processor through an RF (Radio Frequency) link (Chain). One of the beamforming vectors is formed by a Kronecker product of an analog beamforming vector and a digital beamforming vector. Mapping coefficients of multiple antennas in the same antenna group to the antenna ports form an analog beamforming vector of the antenna group, and different antenna groups included in one antenna port correspond to the same analog beamforming vector. The mapping coefficients of the different RF chains included in one of the antenna ports to the antenna port constitute a digital beamforming vector for this antenna port.
As sub-embodiment 1 of embodiment 2, the reference signal group includes only one reference signal, and the reference signals in the reference signal group are transmitted by the antenna ports in the corresponding transmit antenna port group.
As sub-embodiment 2 of embodiment 2, the reference signal group includes only a plurality of the reference signals, and the plurality of reference signals in the reference signal group are transmitted by a plurality of antenna ports in a corresponding transmission antenna port group, respectively. Different antenna ports in one antenna port group correspond to the same analog beamforming vector.
As sub-embodiment 3 of embodiment 2, different ones of the antenna ports in one of the antenna port groups correspond to different ones of the digital beamforming vectors.
As sub-embodiment 4 of embodiment 2, the K antenna port groups are subsets of M antenna port groups, the UE sends auxiliary information according to measurements on the M antenna port groups, and the base station determines and configures the K antenna port groups for the UE according to the auxiliary information.
Example 3
Embodiment 3 illustrates a timing diagram of K reference signal groups, as shown in fig. 3.
In embodiment 3, K antenna port groups correspond to K reference signal groups. And time domain resources occupied by any two reference signal groups in the K reference signal groups are orthogonal. The analog beamforming vectors corresponding to any two of the K sets of reference signals cannot be considered to be the same. The K sets of reference signals occupy K time windows. The K time windows are orthogonal in the time domain.
As sub-embodiment 1 of embodiment 3, fig. 3 depicts one transmission of the K reference signal groups. The K reference signal groups are transmitted periodically.
As sub-embodiment 2 of embodiment 3, the reference signal adopts a CSI-RS pattern within one time window.
As a sub-embodiment 3 of embodiment 3, the reference signal adopts a pattern of SS within a time window.
As sub-embodiment 4 of embodiment 3, the time window in fig. 3 includes Q1 OFDM symbols, and Q1 is one of {2, 4, 7, 14 }.
Example 4
Embodiment 4 illustrates a block diagram of a processing device used in a UE, as shown in fig. 4. In fig. 4, the UE apparatus 200 is mainly composed of a first receiving module 201, a second receiving module 202 and a third transmitting module 203.
In embodiment 4, 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.
In embodiment 4, the first signaling is used to determine at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As sub embodiment 1 of embodiment 4, the third sending module 203 is further configured to send the second information. Wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 2 of embodiment 4, the second receiving module is further configured to receive a second wireless signal, and the third transmitting module is further configured to transmit third information. Wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As sub-embodiment 3 of embodiment 4, the first receiving module is further configured to receive second signaling. Wherein the first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As sub-embodiment 4 of embodiment 4, the third sending module is further configured to send fourth information. Wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
Example 5
Embodiment 5 illustrates a block diagram of a processing apparatus used in a base station, as shown in fig. 5. In fig. 5, the base station apparatus 300 is mainly composed of a first transmitting module 301, a second transmitting module 302 and a third receiving module 303.
In embodiment 5, 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 is used for receiving the first information.
In embodiment 5, the first signaling is used to determine at least one of { target antenna port group, target threshold }. K antenna port groups are used for transmitting the first wireless signal. All antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier. The K is a positive integer greater than 1. The target antenna port group is one of the K antenna port groups. The K antenna port groups correspond to K channel quality values, respectively. The target channel quality is a channel quality value corresponding to the target antenna port group among the K channel quality values. The first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 1 of embodiment 5, the third receiving module is further configured to receive second information. Wherein the second information is used to determine K1 antenna port groups of the K antenna port groups. The K1 antenna port groups correspond to K1 of the K channel quality values. Any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
As sub-embodiment 2 of embodiment 5, the second transmitting module is further configured to transmit a second wireless signal, and the third receiving module is further configured to receive third information. Wherein the K2 antenna port groups are used to transmit the second wireless signal. The K2 is a positive integer greater than 1. The second wireless signal is associated with the first wireless signal. The third information is used to determine K3 antenna port groups of the K2 antenna port groups. The K3 is a positive integer. The K2 antenna port groups correspond to K2 channel quality values, respectively. The K3 antenna port groups correspond to K3 channel quality values, respectively. The K3 channel quality values are the best K3 of the K2 channel quality values.
As sub-embodiment 3 of embodiment 5, the first sending module is further configured to send the second signaling. Wherein the first information is used to trigger the sending of the second signaling. The second signaling is used to trigger the transmission of at least one of { the second information, the third information }.
As sub-embodiment 4 of embodiment 5, the third receiving module is further configured to receive fourth information. Wherein the fourth information is used to determine at least one of the K1 channel quality values, the K3 channel quality values.
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 (12)
1. A method in a UE 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 at least one of { target antenna port group, target threshold }; k antenna port groups are used for transmitting the first wireless signal; all antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier; k is a positive integer greater than 1; the target antenna port group is one of the K antenna port groups; the K antenna port groups respectively correspond to K channel quality values; the target channel quality is a channel quality value corresponding to the target antenna port group in the K channel quality values; the first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
2. The method of claim 1, further comprising the steps of:
-step d. sending the second information;
wherein the second information is used to determine K1 of the K antenna port groups; the K1 antenna port groups correspond to K1 of the K channel quality values; any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
3. The method of claim 1, further comprising the steps of:
-step e. receiving a second wireless signal;
-step f. sending a third information;
wherein K2 antenna port groups are used to transmit the second wireless signal; the K2 is a positive integer greater than 1; the second wireless signal is associated with the first wireless signal; the third information is used to determine K3 antenna port groups of the K2 antenna port groups; the K3 is a positive integer; the K2 antenna port groups correspond to K2 channel quality values, respectively; the K3 antenna port groups correspond to K3 channel quality values, respectively; the K3 channel quality values are the best K3 of the K2 channel quality values.
4. The method of claim 2, further comprising the steps of:
-step g. receiving a second signaling;
wherein the first information is used to trigger the transmission of the second signaling; the second signaling is used to trigger the sending of the second information.
5. The method of claim 3, further comprising the steps of:
-step h. sending a fourth information;
wherein the fourth information is used to determine the K3 channel quality values.
6. A method in a base station 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 at least one of { target antenna port group, target threshold }; k antenna port groups are used for transmitting the first wireless signal; all antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier; k is a positive integer greater than 1; the target antenna port group is one of the K antenna port groups; the K antenna port groups respectively correspond to K channel quality values; the target channel quality is a channel quality value corresponding to the target antenna port group in the K channel quality values; the first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
7. The method of claim 6, further comprising the steps of:
-step d. receiving second information;
wherein the second information is used to determine K1 of the K antenna port groups; the K1 antenna port groups correspond to K1 of the K channel quality values; any one of the K1 channel quality values is greater than the sum of the target channel quality plus the target threshold.
8. The method of claim 6, further comprising the steps of:
-step e. transmitting a second wireless signal;
-step f. receiving third information;
wherein K2 antenna port groups are used to transmit the second wireless signal; the K2 is a positive integer greater than 1; the second wireless signal is associated with the first wireless signal; the third information is used to determine K3 antenna port groups of the K2 antenna port groups; the K3 is a positive integer; the K2 antenna port groups correspond to K2 channel quality values, respectively; the K3 antenna port groups correspond to K3 channel quality values, respectively; the K3 channel quality values are the best K3 of the K2 channel quality values.
9. The method of claim 7, further comprising the steps of:
-step g. sending a second signaling;
wherein the first information is used to trigger the transmission of the second signaling; the second signaling is used to trigger the sending of the second information.
10. The method of claim 8, further comprising the steps of:
-step h. receiving fourth information;
wherein the fourth information is used to determine the K3 channel quality values.
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 sending the first information;
wherein the first signaling is used to determine at least one of { target antenna port group, target threshold }; k antenna port groups are used for transmitting the first wireless signal; all antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier; k is a positive integer greater than 1; the target antenna port group is one of the K antenna port groups; the K antenna port groups respectively correspond to K channel quality values; the target channel quality is a channel quality value corresponding to the target antenna port group in the K channel quality values; the first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
12. 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;
wherein the first signaling is used to determine at least one of { target antenna port group, target threshold }; k antenna port groups are used for transmitting the first wireless signal; all antenna ports in the K antenna port groups are used for the same serving cell, or all antenna ports in the K antenna port groups are used for the same carrier; k is a positive integer greater than 1; the target antenna port group is one of the K antenna port groups; the K antenna port groups respectively correspond to K channel quality values; the target channel quality is a channel quality value corresponding to the target antenna port group in the K channel quality values; the first information is used to determine whether there is a channel quality value of the K channel quality values that is greater than the sum of the target channel quality plus the target threshold.
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| CN115021882A (en) * | 2020-07-20 | 2022-09-06 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
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| CN102215526B (en) * | 2010-04-09 | 2015-11-25 | 中兴通讯股份有限公司 | The report method of measuring results under multicarrier system, system and subscriber equipment |
| CN103858468B (en) * | 2012-09-25 | 2018-06-26 | 华为技术有限公司 | Communication means, user equipment, base station and communication system |
| CN104661313B (en) * | 2013-11-22 | 2019-03-22 | 上海朗帛通信技术有限公司 | A kind of sending method and device of downlink auxiliary information |
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