CN113489518A

CN113489518A - Method and device for multi-antenna transmission in base station and user equipment

Info

Publication number: CN113489518A
Application number: CN202110741737.9A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2021-10-08
Also published as: CN108736944A; CN108736944B

Abstract

The invention discloses a method and a device for multi-antenna transmission in a base station and user equipment. The user equipment sequentially performs reception of the L reference signal groups, reception of the first information, and reception of the M reference signal groups. The first reference signal group is one of the L reference signal groups. A first transmit beam is used to transmit the first set of reference signals. M transmit beams are used to transmit the M sets of reference signals. The first information is used to determine at least the former of { a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam, a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam }. The invention can improve the resource utilization efficiency and accuracy of beam scanning.

Description

Method and device for multi-antenna transmission in base station and user equipment

The present application is a divisional application of the following original applications:

application date of the original application: 2017.04.19

- -application number of the original application: 201710257332.1

The invention of the original application is named: method and device for multi-antenna transmission in base station and user equipment

Technical Field

The present application relates to a transmission scheme of wireless signals in a wireless communication system, and more particularly, to a method and apparatus for multi-antenna transmission.

Background

Large-scale (Massive) MIMO (Multi-Input Multi-Output) is a research hotspot for next-generation mobile communication. In massive MIMO, a plurality of antennas form a beam pointing in a specific direction by beamforming to improve communication quality, and one transmit beam and one receive beam form a beam pair. Wider beams have higher communication stability than narrower beams, and narrower beams have higher beamforming gain than wider beams. Thus, in the 3GPP RAN-1 discussion, there are companies that propose wider beams that can be used to transmit physical layer control signaling without acknowledgement (ACK/NACK), narrower beams that can be used to transmit data with an acknowledgement, and that apply multi-level beam scanning to beam determination,

disclosure of Invention

The inventor finds, through research, how to improve beam scanning efficiency and save beam scanning resources by effectively and accurately indicating the correlation between multi-stage beam scanning, and how to effectively instruct the user equipment to adjust the corresponding receiving beam width so as to improve beamforming gain and reduce interference reception, which is a problem to be solved by a large-scale MIMO transmission system.

The present application provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in the base station of the present application may be applied in the user equipment and vice versa.

The application discloses a method used in user equipment for multi-antenna transmission, which comprises the following steps:

-a. receiving L sets of reference signals;

-step b. receiving first information;

-step c. receiving M sets of reference signals.

Wherein the first reference signal group is one of the L reference signal groups. A first transmit beam is used to transmit the first set of reference signals. M transmit beams are used to transmit the M sets of reference signals. The first information is used to determine at least the former of { a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam, a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam }. Said L and said M are positive integers greater than 1.

As an example, the above method has the benefits of: the correlation between the directions of the transmitted beams can be used for determining the correlation between the two stages of beam scanning, so that the efficiency of the multi-stage beam scanning is improved, and the beam scanning resources are saved. Further, beamwidth matching between the transmit beam and the receive beam may be used to increase beamforming gain and reduce interference reception, and a relative relationship between the two stages of transmit beamforming gain may be used to instruct the user equipment to adjust the receive beamwidth.

As an embodiment, the above method may be used to determine a relationship between any two adjacent beam sweeps in a P-rank beam sweep, where P is a positive integer not less than 2.

As one embodiment, antenna virtualization vectors are used to form the beams.

As one embodiment, transmit beamforming vectors are used to form the transmit beams and receive beamforming vectors are used to form the receive beams.

As an embodiment, the beam is an antenna pattern (antenna pattern) formed after a beamforming vector is applied to a plurality of antenna factors (antenna elements).

As an embodiment, the transmission beam is a radiation pattern (radiation pattern) formed by applying an antenna virtualization vector to a plurality of antenna factors.

For one embodiment, the receive beam is an electromagnetic radiation receive intensity pattern formed by applying a receive beamforming vector to a plurality of antenna factors.

As an embodiment, the beam direction of a beam refers to a line of sight (boresight) of the beam.

As an embodiment, the beam direction of a beam refers to a line of sight of a phase antenna array formed after a beamforming vector corresponding to the beam acts on a plurality of antenna factors.

As an embodiment, the beam direction of a beam refers to a direction in which an antenna gain is maximum on a radiation pattern (radiation pattern) corresponding to the beam.

As an embodiment, the beam direction of a beam refers to a direction in which an antenna gain is maximum on an antenna pattern formed by applying a beamforming vector corresponding to the beam to a plurality of antenna factors.

As an example, the beamwidth of a beam refers to the angle between two half-power points of the main lobe of the beam.

As an embodiment, the beam width of a beam refers to an included angle between two half-power points of a main lobe on an antenna pattern of a phase antenna array corresponding to the beam.

As an embodiment, one of the reference signal groups comprises only one reference signal.

For one embodiment, one of the reference signal groups includes a plurality of reference signals.

As one embodiment, the user equipment transmits first channel information used to determine L1 reference signal groups of the L reference signal groups, the first reference signal group being one reference signal group of the L1 reference signal groups. The L1 is a positive integer.

As an embodiment, the L reference signal groups are used for measuring L channel quality values, and the L1 reference signal groups correspond to the best L1 channel quality values among the L channel quality values.

As an embodiment, the first set of reference signals is signalled by a base station.

As an embodiment, the first reference signal group is reported by the ue.

As an embodiment, the Reference Signal in the Reference Signal group is a CSI-RS (Channel State Information Reference Signal).

As an embodiment, the reference Signal in the reference Signal group is SS (Synchronization Signal).

As an embodiment, the first Information is DCI (Physical layer Control Information) transmitted through a PDCCH (Downlink Physical Control Channel).

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

As an embodiment, the first information is RRC signaling.

As an embodiment, the first information explicitly indicates a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As one embodiment, the first information display indicates a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam.

As an embodiment, the first information implicitly indicates a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As an embodiment, the first information implicitly indicates a relative relationship between a beam width of one of the M transmit beams and a beam width of the first transmit beam.

As an embodiment, the degree of correlation of the beam direction of the M transmission beams with the beam direction of the first transmission beam is used to implicitly indicate a relative relationship between the beam width of one of the M transmission beams and the beam width of the first transmission beam.

As an embodiment, one of the N receive beams is used to receive the M sets of reference signals. The M transmit beams are reused N times for transmitting K reference signal groups, the K being a product of the M and the N. The N receive beams are used to receive N sets of reference signals, respectively, that are repeatedly transmitted by one of the M transmit beams. And N is a positive integer.

As one embodiment, the user equipment transmits second channel information used to determine K1 reference signal groups of the K reference signal groups, the K1 being a positive integer less than K.

As an example, the K reference signal groups are used to measure K channel quality values, and the K1 reference signal groups correspond to the best K1 channel quality values of the K channel quality values.

As an embodiment, the correlation of the beam direction of the M transmit beams with the beam direction of the first transmit beam is used by the user equipment to determine the beam direction of the N receive beams.

As an embodiment, a forward association between the beam directions of the N receive beams and the beam directions of the receive beams used for receiving the first reference signal group, and the beam directions of the M transmit beams and the beam direction of the first transmit beam is formed.

As an embodiment, the greater the correlation of the beam directions of the M transmit beams with the beam direction of the first transmit beam, the greater the correlation of the beam directions of the N receive beams with the beam directions of the receive beams used to receive the first set of reference signals.

As an embodiment, the relative relationship between the beam width of one of the M transmit beams and the beam width of the first transmit beam is used by the user equipment to determine the beam widths of the N receive beams.

As an embodiment, a beamwidth of one of the N receive beams is positively associated with a beamwidth used for one of the M transmit beams.

As an embodiment, the larger the beam width of one of the M transmit beams, the larger the beam width of one of the N receive beams.

As an embodiment, the correlation between the beam directions of the M transmission beams and the beam direction of the first transmission beam refers to an included angle between the beam directions of the M transmission beams and the beam direction of the first transmission beam.

As an embodiment, the correlation between the beam directions of the M transmission beams and the beam direction of the first transmission beam refers to a relative relationship between an angle between a beam direction of the M transmission beams and the first transmission beam and a first threshold. The first threshold is a positive real number not less than 0 and not more than pi.

As an embodiment, the angle between the beam direction of the M transmit beams and the beam direction of the first transmit beam is used to determine the angle between the beam direction of the N receive beams and the beam direction of the receive beam used to receive the first set of reference signals.

As an embodiment, the correlation between the beam direction of the M transmission beams and the beam direction of the first transmission beam refers to a relative relationship between a maximum one of M angles between the beam direction of the M transmission beams and the beam direction of the first transmission beam and the first threshold.

As an embodiment, the correlation between the beam directions of the M transmission beams and the beam direction of the first transmission beam refers to a relative relationship between a minimum one of M angles between the beam directions of the M transmission beams and the beam direction of the first transmission beam and the first threshold.

As an embodiment, the correlation between the beam directions of the M transmission beams and the beam direction of the first transmission beam refers to a relative relationship between an average value of M included angles between the beam directions of the M transmission beams and the beam direction of the first transmission beam and the first threshold.

As an embodiment, an angle between a beam direction of any one of the M transmission beams and a beam direction of the first transmission beam is greater than the first threshold.

As a sub-embodiment of the foregoing embodiment, an angle between a beam direction of any one of the N reception beams and a beam direction of a reception beam used for receiving the first reference signal group is greater than the first threshold.

As an embodiment, an angle between a beam direction of any one of the M transmission beams and a beam direction of the first transmission beam is equal to the first threshold.

As a sub-embodiment of the above-mentioned embodiment, an angle between a beam direction of any one of the N reception beams and a beam direction of a reception beam for receiving the first reference signal group is equal to the first threshold.

As an embodiment, an angle between a beam direction of any one of the M transmission beams and a beam direction of the first transmission beam is smaller than the first threshold.

As a sub-embodiment of the foregoing embodiment, an angle between a beam direction of any one of the N reception beams and a beam direction of a reception beam used for receiving the first reference signal group is smaller than the first threshold.

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

As an embodiment, the first threshold is preconfigured.

As an embodiment, the first threshold is the smallest angle between the beam directions used for the first transmit beam and the other transmit beams used for transmitting the L reference signal groups.

As an embodiment, the first threshold is a maximum angle between beam directions of the transmit beam used for the first transmit beam and other transmit beams used for transmitting the L reference signal groups.

As an embodiment, one of the M transmit beams is a transmit beam used for transmitting the first reference signal group.

As a sub-embodiment of the above-mentioned embodiment, a beam width of any one of the M transmission beams is equal to a beam width of the first transmission beam.

As a sub-embodiment of the above-mentioned embodiment, one of the N receive beams is a receive beam used for receiving the first reference signal group, and a beam width of any one of the N receive beams is equal to a beam width of a receive beam used for receiving the first reference signal group.

As an embodiment, an angle between the beam direction of the M transmission beams and the beam direction of the first transmission beam is one of P candidate values, where P is a positive integer greater than 1.

As an embodiment, an angle between a beam direction of the M transmission beams and a beam direction of the first transmission beam is within one of P candidate ranges, where P is a positive integer greater than 1.

As an embodiment, a relative relationship between a beam width of one of the M transmit beams and a beam width of the first transmit beam is used to determine a relative relationship between a beam width of a receive beam used to receive the M reference signal groups and a beam width of a receive beam used to receive the first reference signal group.

As an embodiment, a beam width of any one of the M transmission beams is smaller than a beam width of the first transmission beam.

As a sub-embodiment of the above embodiment, a beam width of the reception beam used for receiving the M reference signal groups is smaller than a beam width of the reception beam used for receiving the first reference signal group.

As an embodiment, a beam width of any one of the M transmission beams is equal to a beam width of the first transmission beam.

As a sub-embodiment of the above embodiment, a beam width of the reception beam used for receiving the M reference signal groups is equal to a beam width of the reception beam used for receiving the first reference signal group.

As an embodiment, a beam width of any one of the M transmission beams is larger than a beam width of the first transmission beam.

As a sub-embodiment of the above embodiment, a beam width of the reception beam used for receiving the M reference signal groups is larger than a beam width of the reception beam used for receiving the first reference signal group.

As an embodiment, a beam width of any one of the M transmission beams is P times a beam width of the first transmission beam, where P is a positive real number.

As a sub-embodiment of the above embodiment, a beam width of the reception beam used for receiving the M reference signal groups is P times larger than a beam width of the reception beam used for receiving the first reference signal group.

In particular, according to one aspect of the present application, said first information is further used for determining said first set of reference signals.

As an embodiment, the above method has the advantage that the next stage of beam scanning is controlled by the network side for flexible scheduling.

As one embodiment, the first information explicitly indicates the first set of reference signals.

As one embodiment, the first information implicitly indicates the first set of reference signals.

In particular, according to one aspect of the present application, the first information is further used for determining a first threshold value, which is used for determining a correlation degree of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As an example, the above method may be advantageous in that the base station performs a more accurate next level of refinement beam scanning by configuring the first threshold.

As an embodiment, the first information explicitly indicates the first threshold.

As one embodiment, the first information implicitly indicates the first threshold.

As an embodiment, a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam is greater than the first threshold.

As an embodiment, a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam is equal to the first threshold.

As an embodiment, a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam is smaller than the first threshold.

As one embodiment, the first threshold is a positive real number not less than 0 and not greater than pi.

Specifically, according to an aspect of the present application, the first information is further used to determine an included angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As an example, the above approach has the benefit of increased flexibility and accuracy of multi-stage beam scanning.

As an embodiment, the first information explicitly indicates an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As an embodiment, the first information implicitly indicates an included angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As an embodiment, the M transmission beams correspond to M beam directions, and the reference transmission beam is a transmission beam corresponding to a beam direction of the M transmission beams whose beam direction is closest to a mean of the M beam directions.

As an embodiment, the reference transmission beam is a transmission beam of the M transmission beams that has a largest beam direction angle with the first transmission beam.

As an embodiment, the reference transmission beam is a transmission beam of the M transmission beams, which has a smallest beam direction angle with the first transmission beam.

As one embodiment, two of { the correlation degree of the beam directions of the M transmission beams with the beam direction of the reference transmission beam, the included angle between the beam direction of the reference transmission beam corresponding to the M transmission beams and the beam direction of the first transmission beam } are used to determine the correlation degree of the beam directions of the M transmission beams with the beam direction of the first transmission beam.

As an embodiment, the first threshold is used to determine a degree of correlation of beam directions of the M transmit beams with beam directions of the reference transmit beam.

Specifically, according to an aspect of the present application, the method further includes the steps of:

-step d. receiving second information;

-step e. receiving first physical layer signalling;

-step f.

Wherein the second reference signal group is one of the M reference signal groups. The second information is used to determine that a receiver beam used by a transmitter of the first physical layer signaling to receive the first reference signal group is used to receive the first physical layer signaling, and that one of the transmitter hypotheses { a receiver beam used to receive the first reference signal group, a receiver beam used to receive the second reference signal group } of the first downlink data signal is used to receive the first downlink data signal. The first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

As an embodiment, the above method has the advantage of being used for flexibly indicating the receiving beam used for receiving the downlink data transmission and saving the signaling overhead for beam indication.

As an embodiment, the second information is a higher layer signaling.

As an embodiment, the second information is RRC signaling.

As an embodiment, the second information is physical layer signaling.

As an embodiment, the second information is DCI transmitted through a PDCCH.

As an embodiment, the second information explicitly indicates that a sender of the first physical layer signaling assumes that a receive beam used to receive the first set of reference signals is used to receive the first physical layer signaling.

As an embodiment, the second information implicitly indicates that a sender of the first physical layer signaling assumed that a receive beam used to receive the first set of reference signals was used to receive the first physical layer signaling.

As one embodiment, the second information indicates index values of the first reference signal group among the L reference signal groups.

As one embodiment, the second information includes index values of receive beams used to receive the first set of reference signals in a set of receive beams used to receive the L sets of reference signals.

As an embodiment, the first physical layer signaling explicitly indicates that one of the sender hypotheses { receive beam for receiving the first reference signal group, receive beam for receiving the second reference signal group } of the first downlink data signal is used for receiving the first downlink data signal.

As an embodiment, the first physical layer signaling implicitly indicates that one of the senders of the first downlink data signals assumes { receive beam for receiving the first set of reference signals, receive beam for receiving the second set of reference signals } is used for receiving the first downlink data signals.

As an embodiment, one of the N receive beams is used to receive the M sets of reference signals. The M transmit beams are reused N times for transmitting K reference signal groups, the K being a product of the M and the N. The N receive beams are used to receive N sets of reference signals, respectively, that are repeatedly transmitted by one of the M transmit beams. And N is a positive integer. The user equipment transmits second channel information, which is used to determine P sets of reference signal groups, a reference signal group of the P sets of reference signal groups being a reference signal group of the K sets of reference signal groups. And P is a positive integer. The first set of reference signal groups is the set of reference signal groups of the P sets of reference signal groups in which the second set of reference signal groups is located. The index values of the first set of reference signal groups in the P sets of reference signal groups are used to determine that the sender of the first downlink data signal assumes that the receive beam used to receive the second set of reference signals is used to receive the first downlink data signal.

As a sub-embodiment of the above embodiment, one set of reference signal groups corresponds to one of the N receive beams.

As a sub-embodiment of the foregoing embodiment, a plurality of the N receiving beams in one reference signal group set may be used to receive a receiving beam of downlink signaling or data transmission at the same time.

As a sub-embodiment of the above embodiment, the first physical layer signaling includes index values of the N receive beams for receiving the second reference signal group.

As one embodiment, the first physical layer signaling is DCI transmitted through a PDCCH.

As an embodiment, the first physical layer signaling is DCI transmitted through an ePDCCH (enhanced PDCCH).

As an embodiment, the first physical layer signaling explicitly indicates a time resource occupied by the first downlink data signal.

As an embodiment, the first physical layer signaling implicitly indicates a time resource occupied by the first downlink data signal.

As an embodiment, the time resource occupied by the first downlink data signal is a continuous ofdm (orthogonal Frequency Division multiplexing) symbol.

As an embodiment, the time resource occupied by the first downlink data signal is a discontinuous OFDM symbol.

The application discloses a method used in base station equipment for multi-antenna transmission, which comprises the following steps:

-step a. sending L sets of reference signals;

-step b. sending the first information;

-step c. sending M sets of reference signals.

-step d. sending the second information;

-step e. sending a first physical layer signalling;

-step f.

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

-a first receiving module: is used to receive L sets of reference signals;

-a second receiving module: is used for receiving first information;

-a third receiving module: is used to receive M sets of reference signals.

As an embodiment, the above user equipment is characterized in that the first information is also used for determining the first reference signal group.

As an embodiment, the above user equipment is characterized in that the first information is further used for determining a first threshold value, the first threshold value being used for determining a correlation degree of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As an embodiment, the user equipment is characterized in that the first information is further used for determining an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As an embodiment, the user equipment is characterized in that the third receiving module is further configured to sequentially receive the second information, the first physical layer signaling and the first downlink data signal. Wherein the second reference signal group is one of the M reference signal groups. The second information is used to determine that a receiver beam used by a transmitter of the first physical layer signaling to receive the first reference signal group is used to receive the first physical layer signaling, and that one of the transmitter hypotheses { a receiver beam used to receive the first reference signal group, a receiver beam used to receive the second reference signal group } of the first downlink data signal is used to receive the first downlink data signal. The first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

The application discloses be used for transmission of many antennas base station equipment, wherein, including following module:

-a first sending module: is used to transmit L sets of reference signals;

-a second sending module: is used for transmitting first information;

-a third sending module: is used to transmit M reference signal groups.

As an embodiment, the above base station device is characterized in that the first information is also used for determining the first reference signal group.

As an embodiment, the above base station device is characterized in that the first information is further used to determine a first threshold value, which is used to determine a correlation degree of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As an embodiment, the base station device is characterized in that the first information is further used for determining an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As an embodiment, the base station device is characterized in that the third sending module is further configured to send the second information, the first physical layer signaling and the first downlink data signal in sequence. Wherein the second reference signal group is one of the M reference signal groups. The second information is used to determine that a receiver beam used by a transmitter of the first physical layer signaling to receive the first reference signal group is used to receive the first physical layer signaling, and that one of the transmitter hypotheses { a receiver beam used to receive the first reference signal group, a receiver beam used to receive the second reference signal group } of the first downlink data signal is used to receive the first downlink data signal. The first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

As an example, compared with the conventional scheme, the method has the following advantages:

support flexible and accurate multi-level beam scanning;

-increasing the beamforming gain;

-increasing the efficiency of resource utilization used for multi-level beam scanning;

-reducing signaling overhead.

Drawings

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

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

fig. 2 shows a schematic diagram of a first set of reference signals and M transmit beams according to an embodiment of the present application;

fig. 3 shows a schematic diagram of a correlation of beam directions of M transmit beams with a beam direction of a first transmit beam not being greater than a first threshold value according to an embodiment of the application;

fig. 4 is a diagram illustrating an angle between a beam direction of a reference transmission beam corresponding to M transmission beams and a beam direction of the first transmission beam according to an embodiment of the present application;

fig. 5 shows a block diagram of a processing device for use in a user equipment according to an embodiment of the present application;

fig. 6 shows a block diagram of a processing device for use in a base station apparatus according to an embodiment of the present application.

Detailed Description

Example 1

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

For N1, L reference signal groups are transmitted in step S11; transmitting the first information in step S12; transmitting M reference signal groups in step S13; transmitting the second information in step S14; transmitting first physical layer signaling in step S15; the first downlink data signal is transmitted in step S16.

For U2, L reference signal groups are received in step S21; receiving the first information in step S22; receiving M reference signal groups in step S23; receiving second information in step S24; receiving first physical layer signaling in step S25; the first downlink data signal is received in step S26.

In embodiment 1, the first reference signal group is one reference signal group of the L reference signal groups. A first transmit beam is used by N1 to transmit the first set of reference signals. The M transmit beams are used by N1 to transmit the M sets of reference signals. The first information is used by U2 to determine at least the former of { a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam, a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam }. Said L and said M are positive integers greater than 1.

As sub-embodiment 1 of embodiment 1, the first information is also used by U2 to determine the first set of reference signals.

As sub-embodiment 2 of embodiment 1, the first information is further used by U2 to determine a first threshold value used by U2 to determine a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As sub-embodiment 3 of embodiment 1, the first information is further used by U2 to determine an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As sub-embodiment 4 of embodiment 1, the step in block F1 exists, the second set of reference signals being one of the M sets of reference signals. The second information is used by U2 to determine that the N1 hypothesis for receiving the first reference signal group is used by U2 for receiving the first physical layer signaling, which is used by U2 to determine that one of the N1 hypothesis { receive beam for receiving the first reference signal group, receive beam for receiving the second reference signal group } is used by U2 for receiving the first downlink data signal. The first physical layer signaling is also used by U2 to determine the time resources occupied by the first downlink data signal.

In the case of no conflict, the above sub-embodiments 1 to 4 can be arbitrarily combined.

Example 2

Embodiment 2 illustrates a first reference signal group and M transmission beams, as shown in fig. 2.

In embodiment 2, in the first stage, L reference signal groups are used for channel measurement, and L beam pairs consisting of L0 transmission beams and L1 reception beams are used for transmission and reception of the L reference signal groups. The L0, the L1 and the L are positive integers. The L is the product of the L0 and the L1. The first reference signal group is one of the L reference signal groups. A beam pair of a first transmit beam and a first receive beam is used to transmit and receive the first set of reference signals.

In embodiment 2, in the second stage, K reference signal groups are used for channel measurement, and K beam pairs consisting of M transmission beams and N reception beams are used for transmitting and receiving the K reference signal groups, where K is the product of M and N. The base station indicates the UE (User Equipment) that the beam directions of the M transmission beams are highly correlated with the beam direction of the first transmission beam, and the beam widths of the M transmission beams are smaller than the beam width of the first transmission beam. After receiving the indication, the UE performs receive beam scanning on the K reference signal groups using the N receive beams with smaller beam widths and high correlation with the first receive beam.

As sub-embodiment 1 of embodiment 2, the beamforming vector used to form the first transmission beam and the beamforming vector used to form one of the M transmission beams are the same in length, the beamforming vector used to form the first transmission beam is a vector consisting of a coefficient and a zero in one DFT (Discrete Fourier Transform) vector, and the beamforming vector used to form one of the M transmission beams is a DFT vector.

As a sub-embodiment 2 of the embodiment 2, the UE reports to the base station index values of L1 reference signal groups in the L reference signal groups, where L1 is a positive integer smaller than L, and the first reference signal group is one reference signal group in the L1 reference signal groups.

As sub-embodiment 3 of embodiment 2, the base station instructs the UE on the first set of reference signals.

As sub-embodiment 4 of embodiment 2, the UE reports, to the base station, index values of K1 reference signal groups in the K reference signal groups, where K1 beam pairs corresponding to the K1 reference signal groups are used by the base station to determine beam pairs used for subsequent data transmission, and K1 is a positive integer smaller than K.

As a sub-embodiment 5 of embodiment 2, any one of M included angles between the beam directions of the M transmission beams and the beam direction of the first transmission beam is smaller than a first threshold, where the first threshold is a positive real number greater than 0 and smaller than pi/2.

As sub-embodiment 6 of embodiment 2, any one of M angles between the M transmission beams and the first transmission beam is smaller than a smallest one of L0-1 angles between the first transmission beam and other L0-1 transmission beamforming vectors of the L0 transmission beamforming vectors.

Example 3

Embodiment 3 illustrates that the correlation of the M transmission beams with the first transmission beam is not greater than the first threshold, as shown in fig. 3. In fig. 3, the ellipse of the dotted line indicates the first transmission beam, the ellipse of the solid line indicates one of the M transmission beams, and the arrow of the dotted line indicates the beam direction.

In embodiment 3, M angles exist between the beam directions of the M transmission beams and the beam direction of the first transmission beam, where M is equal to 4. The beam direction of the first transmit beam is an average of the beam directions of the M transmit beams. The first threshold value has a value between 0 and pi/2. The largest included angle of the M included angles is not larger than a first threshold value.

As sub-embodiment 1 of embodiment 3, the first threshold is equal to π/3.

Example 4

Embodiment 4 illustrates an angle between a beam direction of a reference transmission beam corresponding to M transmission beams and a beam direction of the first transmission beam, as shown in fig. 4. In fig. 4, the ellipse of the broken line indicates the first transmission beam, the ellipse of the solid line indicates one of the M transmission beams, and the arrow of the broken line indicates the beam direction.

In embodiment 4, the beam direction of the reference transmission beam is an average of the beam directions of the M transmission beams, and the first angle is an angle between the beam direction of the reference transmission beam and the first transmission beam direction. The first angle is used by the user equipment to determine the direction of the reference transmit beam. A first threshold is used by the user equipment to determine a degree of correlation of beam directions of the M transmit beams with a beam direction of the reference transmit beam. An included angle between a beam direction of a transmission beam of the M transmission beams except for the reference transmission beam and the reference transmission beam is not greater than the first threshold.

As sub-embodiment 1 of embodiment 4, the first angle and the first threshold are used by the user equipment to determine a beam direction of a receive beam for receiving a reference signal group transmitted through the M transmit beams.

Example 5

Embodiment 5 illustrates a block diagram of a processing apparatus used in a user equipment, as shown in fig. 5. The UE apparatus 200 mainly includes a first receiving module, a second receiving module and a third receiving module.

In embodiment 5, the first receiving module is configured to receive L reference signal groups, the second receiving module is configured to receive the first information, and the third receiving module is configured to receive M reference signal groups.

In embodiment 5, the first reference signal group is one reference signal group of the L reference signal groups. A first transmit beam is used to transmit the first set of reference signals. M transmit beams are used to transmit the M sets of reference signals. The first information is used to determine at least the former of { a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam, a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam }. Said L and said M are positive integers greater than 1.

As sub-embodiment 1 of embodiment 5, the first information is also used to determine the first set of reference signals.

As sub-embodiment 2 of embodiment 5, the first information is further used to determine a first threshold value used to determine a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As sub-embodiment 3 of embodiment 5, the first information is further used to determine an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As sub-embodiment 4 of embodiment 5, the third receiving module 203 is further configured to sequentially receive the second information, receive the first physical layer signaling, and receive the first downlink data signal. Wherein the second reference signal group is one of the M reference signal groups. The second information is used to determine that a receiver beam used by a transmitter of the first physical layer signaling to receive the first reference signal group is used to receive the first physical layer signaling, and that one of the transmitter hypotheses { a receiver beam used to receive the first reference signal group, a receiver beam used to receive the second reference signal group } of the first downlink data signal is used to receive the first downlink data signal. The first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

Example 6

Embodiment 6 illustrates a block diagram of a processing apparatus used in a base station device, as shown in fig. 6. The base station device 300 mainly includes a first sending module, a second sending module, and a third sending module.

In embodiment 6, the first sending module is configured to send L reference signal groups, the second sending module is configured to send the first information, and the third sending module is configured to send M reference signal groups.

In embodiment 6, the first reference signal group is one reference signal group of the L reference signal groups. A first transmit beam is used to transmit the first set of reference signals. M transmit beams are used to transmit the M sets of reference signals. The first information is used to determine at least the former of { a correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam, a relative relationship between a beam width of one of the M transmission beams and a beam width of the first transmission beam }. Said L and said M are positive integers greater than 1.

As sub-embodiment 1 of embodiment 6, the first information is also used to determine the first set of reference signals.

As sub-embodiment 2 of embodiment 6, the first information is further used to determine a first threshold value used to determine a degree of correlation of beam directions of the M transmission beams with a beam direction of the first transmission beam.

As sub-embodiment 3 of embodiment 6, the first information is further used to determine an angle between a beam direction of a reference transmission beam corresponding to the M transmission beams and a beam direction of the first transmission beam.

As sub-embodiment 4 of embodiment 6, the third sending module 303 is further configured to send the second information, send the first physical layer signaling, and send the first downlink data signal in sequence. Wherein the second reference signal group is one of the M reference signal groups. The second information is used to determine that a receiver beam used by a transmitter of the first physical layer signaling to receive the first reference signal group is used to receive the first physical layer signaling, and that one of the transmitter hypotheses { a receiver beam used to receive the first reference signal group, a receiver beam used to receive the second reference signal group } of the first downlink data signal is used to receive the first downlink data signal. The first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

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

Claims

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

-a first receiving module: is used to receive L sets of reference signals;

-a second receiving module: is used for receiving first information;

-a third receiving module: is used to receive M sets of reference signals;

wherein the first reference signal group is one of the L reference signal groups; a first transmit beam is used to transmit the first set of reference signals; m transmit beams are used to transmit the M sets of reference signals; the first information is used to determine a degree of correlation of beam directions of the M transmit beams with a beam direction of the first transmit beam; said L and said M are positive integers greater than 1; the correlation degree between the beam direction of the M transmission beams and the beam direction of the first transmission beam is an included angle between the beam direction of the M transmission beams and the beam direction of the first transmission beam; the first information is RRC signaling; one of the reference signal groups includes one or more reference signals.

2. The user equipment of claim 1, wherein the first information is further used to determine the first set of reference signals.

3. The UE of claim 1 or 2, wherein the third receiving module is further configured to receive second information, receive first physical layer signaling, and receive a first downlink data signal; wherein the second reference signal group is one of the M reference signal groups; the second information indicates that receive beams used to receive the first set of reference signals are used by the user equipment to receive the first physical layer signaling, the first physical layer signaling indicating that one of receive beams used to receive the first set of reference signals or receive beams used to receive the second set of reference signals are used by the user equipment to receive the first downlink data signal; the first physical layer signaling is also used to determine the time resources occupied by the first downlink data signal.

4. The user equipment according to any of claims 1-3, characterized in that an antenna virtualization vector is used for forming the beam; alternatively, transmit beamforming vectors are used to form the transmit beams and receive beamforming vectors are used to form the receive beams.

5. The UE of any of claims 1 to 4, wherein the first information implicitly indicates a correlation between beam directions of the M transmission beams and a beam direction of the first transmission beam.

6. The user equipment according to any of claims 1-5, wherein one of the M transmit beams is the transmit beam used for transmitting the first reference signal group.

7. The UE of any of claims 1 to 6, wherein the beam direction of the M transmission beams is included with the beam direction of the first transmission beam by one of P candidate values, and P is a positive integer greater than 1.

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

-a first sending module: is used to transmit L sets of reference signals;

-a second sending module: is used for transmitting first information;

-a third sending module: is used to transmit the M reference signal groups;

9. A method in a user equipment used for multi-antenna transmission, comprising the steps of:

-a. receiving L sets of reference signals;

-step b. receiving first information;

-step c. receiving M sets of reference signals;

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

-step a. sending L sets of reference signals;

-step b. sending the first information;

-step c. sending M sets of reference signals;