WO2018059002A1

WO2018059002A1 - Beam selection method and related equipment

Info

Publication number: WO2018059002A1
Application number: PCT/CN2017/087489
Authority: WO
Inventors: 高秋彬; 陈润华; 拉盖施; 王蒙军
Original assignee: 电信科学技术研究院
Priority date: 2016-09-30
Filing date: 2017-06-07
Publication date: 2018-04-05
Also published as: TW201815088A; CN107888260B; TWI662805B; CN107888260A

Abstract

Disclosed in the present invention are a beam selection method and related equipment, used to solve the technical problem in the prior art of low reliability of data transmission. The method is: a terminal receiving training tones sent by a number N of downlink transmission beams of a base station and beam grouping information of the N downlink transmission beams sent by the base station, N being an integer greater than zero; on the basis of the training tones and beam grouping information, the terminal determining a number T of downlink transmission beams from among the N downlink transmission beams, T being a positive integer less than N.

Description

Beam selection method and related equipment

The present application claims priority to Chinese Patent Application No. 201610877396.7, entitled "A Beam Selection Method and Related Apparatus", filed on September 30, 2016, the entire contents of in.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a beam selection method and related equipment.

Background technique

Beamforming is a signal preprocessing technique based on an antenna array. Beamforming produces a directional beam by adjusting the weighting coefficients of each element in the antenna array, so that a significant array gain can be obtained. Therefore, beamforming technology has great advantages in terms of expanding coverage, improving edge throughput, and interference.

At present, beamforming is mainly performed on both the base station side and the terminal side. For the downlink direction, the base station sends a downlink beam training signal, the terminal measures the downlink beam training signal, selects the best base station transmit beam, and feeds the beam related information to the base station, and simultaneously selects the corresponding optimal receive beam, and saves it locally. . In the uplink direction, the terminal sends an uplink beam training signal, and the base station measures the uplink beam training signal, selects the best terminal transmission beam, transmits the beam-related information to the terminal, and selects the corresponding optimal receiving beam, and saves it locally. Data transmission can be performed after the uplink and downlink transmit and receive beams are trained. However, in the prior art, only the best transmit beam and receive beam are selected, but the spatial independence between the selected transmit beam and the receive beam is not considered, thereby reducing the reliability of data transmission.

It can be seen that there are technical problems in the prior art that the reliability of data transmission is low.

Summary of the invention

The embodiment of the invention provides a beam selection method and related device, which are used to solve the technical problem that the reliability of data transmission in the prior art is low.

The specific solution provided by the embodiment of the present invention is as follows:

In a first aspect, an embodiment of the present invention provides a beam selection method, including:

The terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

The terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.

In a possible implementation manner, the beam grouping information includes one or more of the following information:

The number of packet groups of the N downlink transmission beams, the number of downlink transmission beams in each packet, the beam identification information of each downlink transmission beam in each packet, and the signal of the training signal corresponding to each downlink transmission beam Identification information.

In a possible implementation manner, the terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, including:

The terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams.

Determining, by the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams;

Correspondingly, the method further includes, when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the method further includes:

Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.

In a possible implementation, the method further includes: when the T downlink transmit beams are determined from the N downlink transmit beams, the method further includes:

Determining T downlink receiving beams corresponding to the T downlink transmission beams, and downlink transmission beams corresponding to downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.

In a possible implementation, after the determining, by the terminal, the T downlink transmit beams from the N downlink transmit beams, based on the training signal and the beam packet information, the method further includes:

And transmitting, by the terminal, related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal.

In a second aspect, an embodiment of the present invention provides a beam selection method, including:

The base station groups N downlink transmit beams used to send the training signal, where N is an integer greater than zero;

Transmitting, by the base station, the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information, where T is smaller than Or a positive integer equal to N.

In a possible implementation, the base station groups the N downlink transmit beams used to send the training signal, including:

The base station groups the N downlink transmit beams according to spatial correlation of the beams; or

The base station groups the N downlink transmit beams according to spatial directivity of the beam.

In a possible implementation manner, the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.

In a possible implementation, after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the method further includes:

The base station receives related information of the T downlink transmit beams sent by the terminal.

In a possible implementation manner, the T downlink transmit beams belong to different packets.

In a possible implementation, the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.

In a possible implementation, the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.

In a possible implementation, after the receiving the information about the T downlink transmit beams sent by the terminal, the method further includes:

The base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal through the at least two downlink transmit beams simultaneously; or

The base station selects at least two downlink transmit beams from the T downlink transmit beams, and simultaneously sends the multiple downlink signals to the terminal by using the at least two downlink transmit beams respectively; or

The base station selects a first downlink transmit beam from the T downlink transmit beams, and sends the downlink signal to the terminal by using the first downlink transmit beam, where the terminal receives by the first The signal quality of the training signal sent by the downlink transmit beam is the best in the training signal sent by the T downlink transmit beams; or

The base station selects at least two downlink transmission beams from the T downlink transmission beams, and maps the downlink signals to multiple sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams respectively. .

In a third aspect, an embodiment of the present invention provides a terminal, including:

a first receiving module, configured to receive a training signal sent by the N downlink transmit beams of the base station, and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

The first determining module is configured to determine T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.

The number of packet groups of the N downlink transmission beams, the number of downlink transmission beams in each packet, and each packet in each packet The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.

In a possible implementation manner, the first determining module is configured to:

And determining, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams.

Determining, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams;

Correspondingly, the first determining module is further configured to: when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the first determining module is further configured to:

In a possible implementation, the determining, by the determining, the T downlink transmit beams from the N downlink transmit beams, the first determining module is further configured to:

In a possible implementation, after the determining, by the terminal, the T downlink transmission beams from the N downlink transmission beams, based on the training signal and the beam grouping information, the terminal further includes:

The first sending module is configured to send related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal.

In a fourth aspect, an embodiment of the present invention further provides a base station, including:

a second grouping module, configured to group N downlink transmit beams used to send the training signal, where N is an integer greater than zero;

a second sending module, configured to send beam grouping information of the N downlink transmit beams to the terminal, so that the terminal determines, according to the beam packet information, T downlink transmit beams from the N downlink transmit beams. , T is a positive integer less than or equal to N.

In a possible implementation manner, the second grouping module is configured to:

In a possible implementation manner, the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group Downstream transmission Beam identification information of the beam and signal identification information of the training signal corresponding to each of the downlink transmission beams.

In a possible implementation, after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the base station further includes:

And a second receiving module, configured to receive information about the T downlink transmit beams sent by the terminal.

In a possible implementation manner, after the receiving the information about the T downlink transmit beams sent by the terminal, the base station further includes:

a second selection module, configured to select at least two downlink transmit beams from the T downlink transmit beams, and send the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or

Selecting at least two downlink transmit beams from the T downlink transmit beams, and simultaneously transmitting the multiple downlink signals to the terminal by using the at least two downlink transmit beams respectively; or

Selecting a first downlink transmission beam from the T downlink transmission beams, and transmitting the downlink signal to the terminal by using the first downlink transmission beam, where the terminal receives the first downlink transmission The signal quality of the training signal transmitted by the beam is the best in the training signal sent by the T downlink transmission beams; or

And selecting at least two downlink transmission beams from the T downlink transmission beams, and mapping the downlink signals to the plurality of sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams.

In a fifth aspect, an embodiment of the present invention provides a terminal, where the terminal mainly includes a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory. The processor reads the program in the memory and executes the following process according to the program:

Receiving, by the transceiver, a training signal sent by the N downlink transmit beams of the base station and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

And determining, according to the training signal and the beam grouping information, T downlink transmission beams from the N downlink transmission beams, where T is a positive integer smaller than N.

In a possible implementation, the processor determines, according to the training signal and the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams.

In a possible implementation, the processor determines T downlink transmit beams respectively belonging to different packets from the N downlink transmit beams according to the training signal and the beam packet information;

Correspondingly, the processor determines T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.

In a possible implementation, the processor determines T downlink receive beams corresponding to the T downlink transmit beams, and the downlink receive beams corresponding to the downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.

In a possible implementation, the processor instructs the transceiver to send information about the T downlink transmit beams to the base station, so that the base station determines to send a downlink signal to the terminal based on the T downlink transmit beams. Downstream transmit beam.

In a sixth aspect, an embodiment of the present invention provides a base station, including: a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory, and the processor reads Take the program in the memory, according to the program to perform the following process:

And grouping N downlink transmit beams used for transmitting the training signal, where N is an integer greater than zero;

Instructing the transceiver to transmit the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information, where T is smaller than Or a positive integer equal to N.

In a possible implementation, the processor groups the N downlink transmit beams according to spatial correlation of the beams; or

The processor groups the N downlink transmit beams according to spatial directivity of the beam.

In a possible implementation manner, the processor instructs the transceiver to receive information about the T downlink transmit beams sent by the terminal.

In a possible implementation, the base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or

In the embodiment of the present invention, the terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero. The terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N, so that the determined T downlink transmissions are performed. The beam has better spatial independence, which ensures the reliability of data transmission, and solves the technical problem of low reliability of data transmission in the prior art.

DRAWINGS

FIG. 1 is a flowchart of a specific implementation of a beam selection method according to an embodiment of the present invention;

FIG. 2 is a flowchart of a specific implementation of another beam selection method according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the embodiment of the present invention, as shown in FIG. 1, the specific process of beam selection is as follows:

Step 101: The terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero.

In the embodiment of the present invention, if the terminal has M receiving beams, N is 4, M is 4, and thus, the received signal received by the terminal is s _nm , and s _nm is the mth downlink receiving beam for the terminal. Receiving a received signal obtained by the nth downlink transmit beam of the base station, and s _nm itself may be a time domain signal or a frequency domain signal, and s _nm is a signal sequence.

In the embodiment of the present invention, the beam grouping information includes one or more of the following information:

Continuing with the above example, the beam grouping information includes: the number of packet groups of four downlink transmission beams, for example, four downlink transmission beams are divided into four groups, three groups, or two groups.

Correspondingly, the number of downlink transmit beams in each packet, for example, when divided into 4 groups, each group includes 1 downlink transmit beam; when divided into 2 groups, each group includes 2 downlink transmit beams, or a group It contains one downlink transmit beam and the other group contains three downlink transmit beams.

The beam identification information of each downlink transmit beam in each packet, for example, when divided into four groups, the beam identification information included in each group is: x ₀ , x ₁ , x ₂ , x ₃ . The value of the beam identification information ranges from 0, 1, 2, ..., N-1.

Correspondingly, the signal identification information of the training signal corresponding to each downlink transmission beam, for example, when divided into four groups, the signal identification information of the training signal of the downlink transmission beam included in each group is: y ₀ , y ₁ , y ₂ , y ₃ , the value range of the signal identification information is: 0, 1, 2, ... N-1.

Step 102: The terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, where T is a positive integer smaller than N.

In the embodiment of the present invention, the specific implementation process of step 102 specifically includes the following steps:

a first step: the terminal determines, according to the training signal, Q downlink transmit beams from the N downlink transmit beams, where Q is an integer greater than zero;

The second step: the terminal determines, according to the beam grouping information, T downlink transmission beams from the Q downlink transmission beams, where T is less than or equal to Q.

In the embodiment of the present invention, based on the training signal, the Q downlink transmission beams are determined from the N downlink transmission beams, including but not limited to the following three manners, specifically:

The first type: determining, according to the received power of the received signal received by the terminal, the Q received signals whose received power is greater than the preset power, and then determining the Q downlink transmit beams corresponding to the Q received signals.

In the embodiment of the present invention, the preset power may specifically be: 5 milliwatts, 7 milliwatts, or 8 milliwatts, or other preset power values. In the specific implementation process, the preset power is 5 mW, taking the received signal of the first receiving beam as an example. If the power of each received signal of the first receiving beam is: 6 mW, 4 mW, 7 Milliwatts, 8 mW, if the received signals exceeding the preset power are s ₁₁ , s ₃₁ , s ₄₁ , the corresponding downlink transmit beams are the first, third, and fourth downlink transmit beams, based on which, it can be determined A downlink transmit beam corresponding to each downlink receive beam is output.

The second type: determining, according to the signal to interference and noise ratio of the received signal received by the terminal, the Q received signals whose signal to interference and noise ratio is greater than the preset signal to interference and noise ratio, and then determining the Q downlink transmissions corresponding to the Q received signals. Beam.

Thirdly, according to the signal to noise ratio of the received signal received by the terminal, the Q received signals whose signal ratio is greater than the preset signal to noise ratio are determined, and then the Q downlink transmit beams corresponding to the Q received signals are determined.

After determining the Q downlink transmit beams, T downlink transmit beams are selected from the Q downlink transmit beams according to the beam packet information.

In the embodiment of the present invention, the T downlink transmission beams are determined according to the beam grouping information, including but not limited to the following three implementation manners, specifically:

First, the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams.

In the embodiment of the present invention, four downlink transmission beams are represented by A, B, C, and D, and four downlink reception beams are represented by A', B', C', and D', and packet information of the downlink transmission beam is represented. In the downlink transmission beam, AB is a group, and CD is a group. If the determined Q downlink transmit beams are specifically: A' (A B); B' (A); C' (C D); D' (B D), where A' (A B) indicates, and The downlink transmission beam corresponding to the downlink receiving beam A' determines that the T downlink transmission beams are the downlink transmission beam A and the downlink transmission beam D.

Second, the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams;

Correspondingly, the method further includes: when the terminal determines, according to the beam grouping information, the T downlink transmission beams that belong to different packets from the N downlink transmission beams, the method further includes:

In the embodiment of the present invention, four downlink transmission beams are represented by A, B, C, and D, and four downlink reception beams are represented by A', B', C', and D', and packet information of the downlink transmission beam is represented. In the downlink transmission beam, AB is a group, and CD is a group. If the determined downlink downlink transmit beams are specifically: A′(A B); B′(A); C′(C D); D′(B D), determining that T downlink transmit beams are downlink transmissions Beam A and downlink transmit beam D.

After determining the T downlink transmit beams, the T downlink receive beams corresponding to the T downlink transmit beams are also determined, and any two downlink receive beams of the T downlink receive beams are different.

In the embodiment of the present invention, the terminal determines, according to the training signal, P downlink receiving beams, where the P downlink receiving beams may be downlink receiving beams for all downlink transmitting beams, or may only be corresponding to T downlink transmitting beams. The downlink receiving beam is not specifically limited in the embodiment of the present application.

In the embodiment of the present invention, the P downlink receiving beams are used as an example for the downlink receiving beams of all the downlink transmitting beams, and the implementation manners of determining the P downlink receiving beams from the M downlink receiving beams are specifically described, including but Not limited to the following three ways:

The first type: determining, according to the received power of the received signal received by the terminal, P received signals whose received power is greater than the preset power, and then determining P downlink receive beams corresponding to the P received signals.

In the embodiment of the present invention, the preset power may specifically be: 5 milliwatts, 7 milliwatts, or 8 milliwatts, or other preset power values. In a specific implementation process, the preset power is 5 mW, and the received signal of the first transmit beam is received by four receive beams as an example. If the receive signals received by the four receive beams respectively have a power of 6 mW, 4 mW, 7 mW, 8 mW, if the received signals exceeding the preset power are s ₁₁ , s ₁₃ , s ₁₄ , the corresponding downlink receiving beams are the first, third, and fourth downlink receiving beams, based on Therefore, the downlink receiving beam corresponding to each downlink transmitting beam can be determined.

The second type: according to the signal to interference and noise ratio of the received signal received by the terminal, determining P received signals whose signal to interference and noise ratio is greater than the preset signal to interference and noise ratio, and then determining P downlink receiving corresponding to the P received signals. Beam.

The third type: according to the signal to noise ratio of the received signal received by the terminal, determining P received signals whose signal ratio is greater than the preset signal to noise ratio, and then determining P downlink receiving beams corresponding to the P received signals.

In the embodiment of the present invention, if the determined P downlink receiving beams are specifically: A (A' B'); B (A'); C (C' D'); D (B' D'), then determining The receive beams corresponding to the T downlink transmit beams should be A' and D' instead of B' and B'.

The third type of T downlink downlink beams corresponding to the T downlink transmission beams are different, and the downlink reception beams corresponding to the downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.

In the embodiment of the present invention, four downlink transmission beams are represented by A, B, C, and D, and four downlink reception beams are represented by A', B', C', and D', and packet information of the downlink transmission beam is represented. The downlink transmission beams AB are grouped into one group, and the downlink transmission beams CD are grouped into one group. If the determined Q downlink transmission beams are specifically: A'(A); B'(B); C'(C); D'(D), T downlink transmissions determined from Q downlink transmission beams The beam is: A and B downlink transmission beams belonging to the same packet and C and D downlink transmission beams belonging to the same packet.

After the T transmit beams are determined, the T receive beams corresponding to the T transmit beams are also determined, and the downlink receive beams corresponding to the downlink transmit beams belonging to the same packet are different from the T downlink receive beams, that is, the downlink transmit beam AB The downlink receive beams are different, and the downlink receive beams of the downlink transmit beam CD are different.

In the embodiment of the present invention, if the determined P downlink receiving beams are specifically: A (A' B'); B (A'); (C' D'); D (B' D'), determining that the downlink receive beams corresponding to the T downlink transmit beams are respectively A (B'); B (A'); C (C') D (B '); or C(D')D(B'); or C(C')D(D').

In the embodiment of the present invention, the following implementation manners are further included in the

steps

101 and 102, which are described in detail below:

In the embodiment of the present invention, if the terminal has M receiving beams, the receiving signal received by the terminal is s _nm , and s _nm is obtained by the nth downlink transmitting beam of the base station receiving the base station by the mth downlink receiving beam. The signal is received, and s _nm itself can be a time domain signal or a frequency domain signal, and s _nm is a signal sequence.

For example, N=16, the beam grouping information includes: the number of grouping groups of 16 downlink transmitting beams, for example, divided into 2 groups, 4 groups, or 8 groups.

Correspondingly, the number of downlink transmit beams in each packet, for example, when divided into 4 groups, each group contains 4 downlink transmit beams; when divided into 2 groups, each group includes 8 downlink transmit beams.

The beam identification information of each downlink transmit beam in each packet, for example, is divided into four groups, and each group of four downlink transmit beams, the beam identification information included in the nth group is: x _n0 , x _n1 , x _n2 , x _n3 . The value of the beam identification information ranges from 0, 1, 2, ..., N-1.

Correspondingly, the signal identification information of the training signal corresponding to each downlink transmission beam, for example, when the group is divided into four groups, the signal identification information of the training signal of the downlink transmission beam included in the nth group is: y _n0 , y _n1 , y _n2 , y _n3 , the value range of the signal identification information is: 0, 1, 2, ... N-1.

The value of T may be determined by the base station, notified to the terminal, or agreed to a fixed value in the protocol, or the terminal determines the value of T according to the measurement result of the signal.

The first step: the terminal receives the training signals of the N downlink transmit beams by using each downlink receive beam to obtain MN received signals, and calculates MN received power values according to the MN received signals, P _nm , n=0, 1, 2 , ... N-1, m = 0, 1, 2, ..., M-1 is the received power value of the training signal of the mth downlink receive beam receiving the nth downlink transmit beam.

In an actual system, due to the influence of channel fading, etc., the terminal may not be able to receive MN received signals, and may only receive a part of the signals, for example, only receiving signals of several downlink transmit beams, and subsequent The calculation process can be performed only based on the received signals, and the principle is the same and will not be described again.

The second step is: determining, for each downlink transmit beam, its corresponding downlink receive beam. For example, for the downlink transmit beam n, the corresponding receive beam can be determined as follows:

For each downlink transmit beam, determining that the received signal power of the downlink transmit beam is the received signal power of the receive beam corresponding to the downlink transmit beam, that is,

The third step: the terminal determines, according to the beam grouping information, T downlink transmission beams from the N downlink transmission beams, where T is less than or equal to N.

Here, the value of the received power is used as an example. In actual implementation, the received signal to interference and noise ratio, the received signal to noise ratio, and the received channel capacity can be used for calculation.

In the embodiment of the present invention, the T downlink transmission beams are determined from the N downlink transmission beams according to the beam grouping information, including but not limited to the following three implementation manners, specifically:

Taking N=4 and M=4 as an example, in the embodiment of the present invention, four downlink transmit beams are represented by A, B, C, and D, and four downlink receive beams are represented by A′, B′, C′, D′. The packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam D. Here T=2.

The specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal sends the downlink transmission again. The beam with the highest received power is selected from the beams other than all the beams in the packet where the beam A is located, and the second beam is the downlink transmit beam D in this example. If T is greater than 2, the selection process is similar: all the beams in the group in which the selected beam is located are removed from the N downlink transmission beams, and one beam having the highest received power is selected from the remaining beams.

If the value of T is determined by the terminal, a threshold of the received signal power may be preset, and the terminal determines the downlink. When transmitting a beam, first remove all downlink transmission beams whose received power is less than the threshold, and then determine the downlink transmission beam from the remaining beams according to the foregoing procedure, and the number of downlink transmission beams that can be determined is the value of T. .

Taking N=4 and M=4 as an example, in the embodiment of the present invention, four downlink transmit beams are represented by A, B, C, and D, and four downlink receive beams are represented by A′, B′, C′, D′. The packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam C.

The specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal then proceeds from the N downlinks. The following two types of downlink transmit beams are removed from the transmit beam:

a) all beams in the packet in which the downlink transmission beam A is located;

b) the downlink transmission beam with the same downlink transmission beam as the downlink reception beam corresponding to the downlink transmission beam A (ie, if the downlink reception beam corresponding to one downlink transmission beam is the same as the downlink reception beam corresponding to the downlink transmission beam A), the downlink transmission is performed. The beam is to be excluded);

The terminal selects the beam with the highest received power from the remaining downlink transmit beams as the second one of the T beams. In this example, it is assumed that the downlink transmit beam D is the same as the downlink receive beam corresponding to the downlink transmit beam A, and the second beam is the downlink transmit beam C. If T is greater than 2, the selection process is similar: remove the following two types of beams, and select the one with the highest received power from the remaining beams:

a) all downlink transmit beams in the packet in which the downlink transmit beam has been selected;

b) a downlink transmission beam having the same downlink downlink beam as the downlink reception beam corresponding to the downlink transmission beam that has been selected (ie, if the downlink reception beam corresponding to one downlink transmission beam corresponds to any downlink transmission beam that has been selected) If the receive beams are the same, the downlink transmit beam is to be excluded).

If the value of T is determined by the terminal, a threshold of the received signal power may be preset. When determining the downlink transmit beam, the terminal first excludes all downlink transmit beams whose received power is less than the threshold, and then according to the foregoing from the remaining beams. The process determines the downlink transmit beam, and the number of downlink transmit beams that can be determined is the value of T.

Third, the terminal transmits the N downlink transmission beams according to the training signal and the beam grouping information. The T downlink transmit beams are determined; and any two corresponding downlink receive beams of the T downlink transmit beams are different.

Taking N=4 and M=4 as an example, in the embodiment of the present invention, four downlink transmit beams are represented by A, B, C, and D, and four downlink receive beams are represented by A′, B′, C′, D′. The packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam B.

The specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal then proceeds from the N downlinks. The downlink transmit beam is removed from the transmit beam: the downlink receive beam with the same downlink receive beam and the downlink receive beam corresponding to the downlink transmit beam A (ie, if the downlink receive beam corresponding to one downlink transmit beam and the downlink receive beam A correspond to downlink receive) If the beams are the same, the downlink transmit beam is to be excluded);

The terminal selects the beam with the highest received power from the remaining downlink transmit beams as the second one of the T beams. In this example, the downlink transmit beam D is the same as the downlink receive beam corresponding to the downlink transmit beam A. The downlink transmit beam B has the highest received power in the remaining downlink transmit beams. Therefore, the second beam is the downlink transmit beam B. If T is greater than 2, the selection process is similar: remove the following beam and select the one with the highest received power from the remaining beams:

The downlink receiving beam is the same as the downlink receiving beam corresponding to the downlink receiving beam that is selected (that is, if the downlink receiving beam corresponding to one downlink transmitting beam is the downlink receiving beam corresponding to any selected downlink transmitting beam) If the same, the downlink transmit beam is to be excluded).

In the embodiment of the present invention, after performing step 102, the method further includes:

In the embodiment of the present invention, the information about the downlink transmit beam includes the beam identifier of the T downlink transmit beams, such as the number of the downlink transmit beam, q ₀ , q ₁ , q ₂ ... q _T-1 . In the specific implementation process, the information of the T downlink transmit beams fed back by the terminal may be different according to the multiplexing manner of the downlink transmit beam or the training signal corresponding to the downlink transmit beam, for example, the training signal is in different OFDM symbols or subframes. Multiplexing, the terminal measures and feeds back the selected downlink time information; or the training signal is multiplexed in different frequency resources, and the terminal measures and feeds back the selected downlink frequency information. Further, the related information of the downlink transmitting beam may further include the receiving received by the terminal. Signal strength information of the signal, such as the power of the received signal.

In the embodiment of the present invention, the terminal needs to save the downlink receiving beam corresponding to the T downlink transmitting beams and the correspondence between the T downlink transmitting beams and the downlink receiving beams. In the specific implementation process, when the terminal saves the downlink receiving beam corresponding to all the downlink transmitting beams, and saves the relationship between the downlink transmitting beam and the downlink receiving beam, the specific downlink signal can be the downlink receiving beam. The number of the beam shaping weight corresponding to the downlink receiving beam may be selected by a person skilled in the art according to actual needs, and is not specifically limited in the embodiment of the present application.

In the embodiment of the present invention, as shown in FIG. 2, the specific process of beam selection is as follows:

Step 201: The base station groups N downlink transmit beams used to send the training signal, where N is an integer greater than zero.

In the embodiment of the present invention, the base station may transmit one training signal for each downlink transmission beam, for example, there are N downlink transmission beams, and the base station transmits N training signals. TDM (Time Division Multiplexing), CDM (Code Division Multiplexing), FDM (Frequency Division Multiplexing), or the above three methods may be used among the N training signals. Any combination of the two or more modes may be set by a person skilled in the art according to actual needs, and is not specifically limited in the embodiment of the present application.

In the embodiment of the present invention, a system based on OFDM (Orthogonal Frequent Frequency Division Multuping) is used as an example to describe a transmission mode of a training signal, and N training signals can occupy N OFDM symbols. Each training signal occupies one OFDM symbol, and the training signals are TDM multiplexed between them; a plurality of training signals may also be transmitted in one OFDM symbol, and the plurality of training signals are FDM multiplexed or CDM multiplexed.

In the embodiment of the present invention, if the antenna array of the base station is a linear array, the weight of the downlink transmission beam may be composed of an oversampled DFT vector. For a linear array, assuming that the number of antenna elements is N ₁ and the oversampling rate factor is O ₁ , the oversampled DFT vector has an O ₁ N ₁ , specifically:

k=0,1,2,...N ₁ O ₁ -1

For a planar array, the weight of the downstream transmit beam can be composed of oversampled 2D DFT vectors. Assuming that the number of antenna elements in the first dimension and the second dimension is N ₁ and N ₂ , respectively, and the oversampling rate factors of the two dimensions are O ₁ and O ₂ , respectively, the oversampled DFT vector has O ₁ O ₂ N ₁ N ₂ :

k=0,1,...,N ₁ O ₁ -1;l=0,1,...N ₂ O ₂

In the embodiment of the present invention, the specific implementation process of step 201 includes but is not limited to the following two implementation manners, specifically:

First, the base station groups the N downlink transmit beams according to spatial correlation of the beams.

In the embodiment of the present invention, if the weight of the downlink transmission beam 1 is a and the weight of the downlink transmission beam 2 is b, the spatial correlation between the downlink transmission beam 1 and the downlink transmission beam 2 is

The downlink transmit beams whose spatial correlation is higher than the preset value are then grouped into one group.

The array antenna is taken as an example, for example, it is divided into N ₁ groups, each group of O ₁ beams, and the weight corresponding to the nth group downlink transmission beam is

Taking a planar antenna as an example, for example, it is divided into N ₁ N ₂ groups, each group of O ₁ O ₂ beams, and n ₁ n ₂ (n ₁ =0, 1, ... N ₁ -1; n ₂ =0, 1, ...N ₂ -1) The weights corresponding to the group beam include:

{z _k,l |k=n ₁ O ₁ ,n ₁ O ₁ +1,...,(n ₁ +1)O ₁ -1;l=n ₂ O ₂ ,n ₂ O ₂ +1,(n ₂ +1)O ₂ -1}

Second, the base station groups the N downlink transmit beams according to spatial directivity of the beam.

In the embodiment of the present invention, the spatial directivity of the beam refers to the direction of the beam in space, and then the space of the downlink transmission beam is directed within a certain range of angles, such as: 0° to 250°, and 250° to 360°. A group. Specifically, N takes 4 as an example, and the four downlink transmit beams are 230°, 250°, 320°, and 350° in the spatial direction, respectively, and then the directions are 230° and 250°, and the directions are It is divided into a group of 320° and 350°.

In the embodiment of the present invention, the beam packet information specifically includes one or more of the following information: a number of packet groups of the N downlink transmit beams, a number of downlink transmit beams in each packet, and each of each packet The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.

Step 202: The base station sends the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information. T is a positive integer less than or equal to N.

In the embodiment of the present invention, after the base station groups the N downlink transmission beams for transmitting the training signal, the beam packet information of the N downlink transmission beams is sent to the terminal, so that the terminal can receive the beam grouping information according to the base station. Determining T downlink transmission beams for transmitting downlink signals is determined from N downlink transmission beams.

In the embodiment of the present invention, after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the method further includes:

In the embodiment of the present invention, the information about the downlink transmit beam includes the beam identifier of the T downlink transmit beams, such as the number of the downlink transmit beam, q ₀ , q ₁ , q ₂ ... q _T-1 .

In the embodiment of the present invention, the T downlink transmission beams respectively belong to different groups.

In the embodiment of the present invention, the T downlink transmission beams belong to different groups, and the downlink receiving beams corresponding to any two downlink transmission beams of the T downlink transmission beams are different.

In the embodiment of the present invention, the T downlink transmit beams belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.

In the embodiment of the present invention, the T downlink transmit beams meet one or a combination of the following conditions, specifically:

First, the T downlink transmit beams belong to different packets, that is, a maximum of one downlink transmit beam is selected from each packet;

If the two downlink transmit beams belong to the same packet, the downlink receive beams corresponding to the two downlink transmit beams are different.

The third downlink transmit beam belongs to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.

In the embodiment of the present invention, after the receiving the information about the T downlink transmit beams sent by the terminal, the method further includes:

In a specific implementation process, the base station can transmit according to the following information transmission manners according to the following information about the T downlink transmission beams sent by the terminal:

The first, send diversity transmission.

The base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example. After the downlink transmission beam is selected, the signal s _{i is} respectively passed through the downlink transmission beam. A and downlink transmit beam B are sent to the terminal, so that the signal s _i is transmitted through different spatial paths, thereby ensuring that the terminal can receive multiple statistically independent, received signals carrying the same information, and then performing the received multiple received signals. Combine or select the received signal with the best signal quality to reduce the influence of fading, so as to achieve the technical effect of improving the reliability of signal transmission.

Second, space division multiplexing transmission.

The base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example. After selecting the downlink transmission beam, multiple signals, such as: s ₁ , The s ₂ and the s ₃ are simultaneously transmitted by using the downlink transmit beam A and the downlink transmit beam B, where the signal s _i can be sent by using the downlink transmit beam A or the downlink transmit beam B or the downlink transmit A and the downlink transmit B, in the embodiment of the present application. Medium, no specific limit.

Third, beam selective transmission.

In the embodiment of the present invention, the base station receives the related information of the T downlink transmit beams fed back by the terminal, and includes the received power of the received signal corresponding to the training signal sent by the T downlink transmit beams. Therefore, the base station can determine the received signal with the strongest received power according to the received power of the received signal, and further determine the downlink transmit beam corresponding to the received signal as the first downlink transmit beam. Correspondingly, the downlink signal s _{i is} transmitted through the first downlink transmission beam.

In a specific implementation process, after the base station detects the current downlink transmission beam occurrence problem, such as: continuous receiving NACK (Negative Acknowledgement), or receiving no feedback information, the base station may switch the signal to other downlinks. Transmission is performed on the transmit beam. The embodiment of the present invention ensures sufficient spatial isolation between the T downlink transmission beams recommended by the terminal, thereby avoiding problems of T downlink transmission beams simultaneously, such as: The probability that the T downlink transmit beams are simultaneously occluded is greatly reduced. In this way, the base station can recover the downlink signal transmission by switching the downlink transmit beam, thereby achieving the technical effect of improving the reliability of the data transmission.

The fourth type is beam switching transmission.

The base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example. After the downlink transmission beam is selected, the downlink signal s _{i is} mapped to different time and frequency. Multiple sub-signals on the resource are transmitted through different downlink transmit beams. In the same manner, the embodiment of the present invention ensures sufficient spatial isolation between the T downlink transmission beams recommended by the terminal, thereby preventing each sub-signal from being affected by the same, thereby ensuring the reliability of data transmission.

Based on the same inventive concept, a terminal is provided in the embodiment of the present invention. For the specific implementation of the terminal, refer to the description of the method embodiment, and the repeated description is not repeated. As shown in FIG. 3, the terminal mainly includes:

The first receiving module 301 is configured to receive a training signal sent by the N downlink transmit beams of the base station and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

The first determining module 302 is configured to determine T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.

In a possible implementation, the first determining module 302 is configured to:

Correspondingly, the first determining module 302 is further configured to: when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the first determining module 302 is further configured to:

In a possible implementation, the first determining module 302 is further configured to: when the T downlink transmit beams are determined from the N downlink transmit beams, the first determining module 302 is further configured to:

Determining T downlink receive beams corresponding to the T downlink transmit beams, and among the T downlink transmit beams The downlink receive beams corresponding to the downlink transmit beams belonging to the same packet are different.

The first sending module 303 is configured to send related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal. .

Based on the same inventive concept, an embodiment of the present invention provides a base station. For a specific implementation of the base station, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 4, the base station mainly includes:

a second grouping module 401, configured to group N downlink transmit beams used to send the training signal, where N is an integer greater than zero;

The second sending module 402 is configured to send, to the terminal, the beam grouping information of the N downlink transmit beams, so that the terminal determines, according to the beam packet information, T downlink transmissions from the N downlink transmit beams. The beam, T, is a positive integer less than or equal to N.

In a possible implementation, the second grouping module 401 is configured to:

The second receiving module 403 is configured to receive related information of the T downlink transmit beams sent by the terminal.

a second selection module 404, configured to select at least two downlink transmit beams from the T downlink transmit beams, and send the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or

Selecting at least two downlink transmit beams from the T downlink transmit beams, and passing the multiple downlink signals respectively Transmitting the at least two downlink transmit beams simultaneously to the terminal; or

Based on the same inventive concept, the embodiment of the present invention provides a terminal. For details of the implementation of the terminal, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 5, the terminal mainly includes a processor 501. The memory 502 and the transceiver 503, the processor 501, the memory 502 and the transceiver 503 are connected by a bus architecture, and the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 501 and The various circuits of the memory represented by memory 502 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 503 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. The transceiver 503 receives and transmits data under the control of the processor 501. The memory 502 stores a preset program, and the processor 501 reads the program in the memory 502, and executes the following process according to the program:

Receiving, by the transceiver 503, a training signal sent by the N downlink transmit beams of the base station and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

In a possible implementation manner, the processor 501 determines, according to the training signal and the beam grouping information, the T downlink transmission beams that belong to different groups, respectively, according to the training signal and the beam grouping information.

In a possible implementation manner, the processor 501 determines, according to the training signal and the beam grouping information, T downlink transmit beams that belong to different groups, respectively, from the N downlink transmit beams;

Correspondingly, the processor 501 determines T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.

In a possible implementation, the processor 501 determines T downlink receiving waves corresponding to the T downlink transmit beams. And a downlink receiving beam corresponding to a downlink transmission beam belonging to the same packet among the T downlink transmission beams is different.

In a possible implementation manner, the processor 501 instructs the transceiver 503 to send information about the T downlink transmit beams to the base station, so that the base station determines to send the downlink to the terminal based on the T downlink transmit beams. The downstream transmit beam of the signal.

In a sixth aspect, the embodiment of the present invention provides a base station. For details of the implementation of the base station, refer to the description of the method embodiment. The repeated description is not repeated. As shown in FIG. 6, the base station mainly includes: a processor 601 and a memory. 602 and transceiver 603, processor 601, memory 602 and transceiver 603 are connected by a bus architecture, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 601 and The various circuits of the memory represented by memory 602 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 603 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 604 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The transceiver 603 receives and transmits data under the control of the processor. The memory 602 stores a preset program, and the processor 601 reads the program in the memory 602, and executes the following process according to the program:

Instructing the transceiver 603 to transmit the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information, where T is A positive integer less than or equal to N.

In a possible implementation, the processor 601 groups the N downlink transmit beams according to spatial correlation of the beams; or

The processor 601 groups the N downlink transmit beams according to spatial directivity of the beam.

In a possible implementation manner, the processor 601 instructs the transceiver 603 to receive related information of the T downlink transmit beams sent by the terminal.

In a possible implementation, the processor 601 selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or

In the embodiment of the present invention, the terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero. The terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N, so that the determined T downlink transmissions are performed. The spatial independence between the beams ensures the reliability of data transmission, thereby solving the technical problem of low reliability of data transmission in the prior art.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory include instructions. In the case of an article of manufacture, the instruction means implements the functions specified in a block or blocks of a flow or a flow and/or a block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A beam selection method, comprising:

The terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

The terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.
The method of claim 1 wherein said beam packet information comprises one or more of the following:

The number of packet groups of the N downlink transmission beams, the number of downlink transmission beams in each packet, the beam identification information of each downlink transmission beam in each packet, and the signal of the training signal corresponding to each downlink transmission beam Identification information.
The method of claim 1, wherein the terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, including:

The terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams.
The method of claim 1, wherein the terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, including:

Determining, by the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams;

Correspondingly, the method further includes, when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the method further includes:

Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
The method of claim 1, wherein the method further comprises: determining the T downlink transmit beams from the N downlink transmit beams, the method further comprising:

Determining T downlink receiving beams corresponding to the T downlink transmission beams, and downlink transmission beams corresponding to downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.
The method according to any one of claims 1 to 5, wherein the terminal determines T downlink transmissions from the N downlink transmission beams based on the training signal and the beam packet information. After the beam, the method further includes:

And transmitting, by the terminal, related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal.
A beam selection method, comprising:

The base station groups N downlink transmit beams used to send the training signal, where N is an integer greater than zero;

Transmitting, by the base station, the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information, where T is smaller than Or a positive integer equal to N.
The method according to claim 7, wherein the base station groups the N downlink transmit beams used for transmitting the training signal, including:

The base station groups the N downlink transmit beams according to spatial correlation of the beams; or

The base station groups the N downlink transmit beams according to spatial directivity of the beam.
The method according to claim 8, wherein the beam packet information specifically comprises one or more of the following: a number of packet groups of the N downlink transmit beams, and a number of downlink transmit beams in each packet. And beam identification information of each downlink transmit beam in each packet and signal identification information of the training signal corresponding to each of the downlink transmit beams.
The method according to any one of claims 7-9, wherein after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the method further includes:

The base station receives related information of the T downlink transmit beams sent by the terminal.
The method of claim 7, wherein the T downlink transmit beams respectively belong to different packets.
The method according to claim 7, wherein the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
The method according to claim 7, wherein the T downlink transmission beams respectively belong to different packets, and downlink reception corresponding to two downlink transmission beams belonging to the same packet among the T downlink transmission beams The beams are different.
The method of claim 10, after the receiving the information about the T downlink transmit beams sent by the terminal, the method further includes:

The base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal through the at least two downlink transmit beams simultaneously; or

The base station selects at least two downlink transmit beams from the T downlink transmit beams, and simultaneously sends the multiple downlink signals to the terminal by using the at least two downlink transmit beams respectively; or

The base station selects a first downlink transmit beam from the T downlink transmit beams, and sends the downlink signal to the terminal by using the first downlink transmit beam, where the terminal receives by the first The signal quality of the training signal sent by the downlink transmit beam is the best in the training signal sent by the T downlink transmit beams; or

The base station selects at least two downlink transmission beams from the T downlink transmission beams, and maps the downlink signals to multiple sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams respectively. .
A terminal, comprising:

a first receiving module, configured to receive a training signal sent by the N downlink transmit beams of the base station, and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

The first determining module is configured to determine T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.
The terminal according to claim 15, wherein the beam grouping information comprises one or more of the following information:

The number of packet groups of the N downlink transmission beams, the number of downlink transmission beams in each packet, the beam identification information of each downlink transmission beam in each packet, and the signal of the training signal corresponding to each downlink transmission beam Identification information.
The terminal according to claim 15, wherein the first determining module is configured to:

And determining, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams.
The terminal according to claim 15, wherein the first determining module is configured to:

Determining, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams;

Correspondingly, the first determining module is further configured to: when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the first determining module is further configured to:

Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
The terminal according to claim 15, wherein the first determining module is further configured to: when the T downlink transmit beams are determined from the N downlink transmit beams:

Determining T downlink receiving beams corresponding to the T downlink transmission beams, and downlink transmission beams corresponding to downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.
The terminal according to any one of claims 15 to 19, wherein the terminal determines T downlink transmissions from the N downlink transmission beams based on the training signal and the beam packet information. After the beam The terminal also includes:

The first sending module is configured to send related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal.
A base station, comprising:

a second grouping module, configured to group N downlink transmit beams used to send the training signal, where N is an integer greater than zero;

a second sending module, configured to send beam grouping information of the N downlink transmit beams to the terminal, so that the terminal determines, according to the beam packet information, T downlink transmit beams from the N downlink transmit beams. , T is a positive integer less than or equal to N.
The base station according to claim 21, wherein said second grouping module is configured to:

The base station groups the N downlink transmit beams according to spatial correlation of the beams; or

The base station groups the N downlink transmit beams according to spatial directivity of the beam.
The base station according to claim 22, wherein the beam packet information specifically includes one or more of the following information: a number of packet groups of the N downlink transmit beams, and a number of downlink transmit beams in each packet. And beam identification information of each downlink transmit beam in each packet and signal identification information of the training signal corresponding to each of the downlink transmit beams.
The base station according to any one of claims 21 to 23, wherein after the base station transmits the beam packet information of the N downlink transmit beams to the terminal, the base station further includes:

And a second receiving module, configured to receive information about the T downlink transmit beams sent by the terminal.
The base station according to claim 21, wherein said T downlink transmission beams respectively belong to different packets.
The base station according to claim 21, wherein the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
The base station according to claim 21, wherein the T downlink transmission beams respectively belong to different packets, and downlink reception corresponding to two downlink transmission beams belonging to the same packet among the T downlink transmission beams The beams are different.
The base station according to claim 24, wherein after receiving the information about the T downlink transmit beams sent by the terminal, the base station further includes:

a second selection module, configured to select at least two downlink transmit beams from the T downlink transmit beams, and send the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or

Selecting at least two downlink transmit beams from the T downlink transmit beams, and passing the multiple downlink signals respectively Transmitting the at least two downlink transmit beams simultaneously to the terminal; or

Selecting a first downlink transmission beam from the T downlink transmission beams, and transmitting the downlink signal to the terminal by using the first downlink transmission beam, where the terminal receives the first downlink transmission The signal quality of the training signal transmitted by the beam is the best in the training signal sent by the T downlink transmission beams; or

And selecting at least two downlink transmission beams from the T downlink transmission beams, and mapping the downlink signals to the plurality of sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams.
A terminal, comprising: a processor, a memory and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the memory Program, according to the program to perform the following process:

Receiving, by the transceiver, a training signal sent by the N downlink transmit beams of the base station and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;

And determining, according to the training signal and the beam grouping information, T downlink transmission beams from the N downlink transmission beams, where T is a positive integer smaller than N.
A base station, comprising: a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, the memory stores a preset program, and the processor reads the program in the memory Follow the procedure to perform the following process:

And grouping N downlink transmit beams used for transmitting the training signal, where N is an integer greater than zero;

Instructing the transceiver to transmit the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information, where T is smaller than Or a positive integer equal to N.