CN114301507B

CN114301507B - Beam training method, device, communication equipment and storage medium

Info

Publication number: CN114301507B
Application number: CN202111571656.5A
Authority: CN
Inventors: 庞浩然; 刘重军; 张维; 丁宝国; 黄鹏飞; 潘雷; 元金海; 吴卓智; 杨雨翰
Original assignee: Comba Network Systems Co Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2023-04-18
Anticipated expiration: 2041-12-21
Also published as: CN114301507A

Abstract

The application discloses a beam training method, a device, equipment and a storage medium, and belongs to the technical field of wireless communication. The method comprises the following steps: receiving a millimeter wave communication signal set sent by first communication equipment, and detecting whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set comprises a beam training procedure indication signal, wherein the beam training signal set comprises a plurality of beam training signals; determining a target beam training signal from a plurality of sets of beam training signals transmitted by the first communication device based on the signal power; and forwarding the target beam training signal to the second communication equipment, wherein the target beam training signal is used for the second communication equipment to respond to the beam training process initiated by the first communication equipment. The technical scheme provided by the embodiment of the application can be used for carrying out beam training under the condition that the millimeter wave communication system comprises the relay equipment.

Description

Beam training method, device, communication equipment and storage medium

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a beam training method and apparatus, a communication device, and a storage medium.

Background

As the number of wireless devices and the amount of mobile traffic has increased rapidly, the existing spectrum resources have approached saturation, and therefore, currently, both 3GPP and IEEE focus on using the millimeter wave frequency band to obtain richer available spectrum resources.

However, the millimeter wave frequency band has a problem of large path loss, so that in order to offset the path loss, a beam forming technique is introduced in the millimeter wave frequency band, in the beam forming technique, a transmitting end of a millimeter wave communication system can transmit a communication signal in a beam form to a direction of a certain transmitting sector, so that the transmitted power is converged on the sector relatively intensively, and meanwhile, a receiving end of the millimeter wave communication system can also receive the communication signal in a direction of a certain receiving sector, and directional communication can be realized through the beam forming technique, so that the path loss can be offset well. In practical application, a beam forming technology is adopted, beam training is required, and both a transmitting end and a receiving end of a millimeter wave communication system can obtain an optimal transceiving sector through the beam training. In addition, the millimeter wave frequency band faces a problem of large path loss and also faces signal fading caused by obstruction, and in order to avoid signal fading, a relay device for forwarding a communication signal may be arranged between a transmitting end and a receiving end of the millimeter wave communication system.

However, in the case where the millimeter wave communication system includes a relay device, there is currently no mature beam training method.

Disclosure of Invention

Based on this, embodiments of the present application provide a beam training method, an apparatus, a communication device, and a storage medium, which can perform beam training when a millimeter wave communication system includes a relay device.

In a first aspect, a beam training method is provided, and is used in a relay device of a millimeter wave communication system, where the millimeter wave communication system includes a first communication device initiating a beam training procedure, a second communication device responding to the beam training procedure, and the relay device, and the beam training method includes:

receiving a millimeter wave communication signal set sent by the first communication device, and detecting whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set comprises a beam training procedure indication signal, wherein the beam training signal set comprises a plurality of beam training signals; determining a target beam training signal from the plurality of sets of beam training signals transmitted by the first communications device based on signal power; and forwarding the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to the beam training procedure initiated by the first communication device.

In a second aspect, a beam training method is provided, which is used in a first communication device initiating a beam training procedure in a millimeter wave communication system, where the millimeter wave communication system includes a second communication device responding to the beam training procedure, a relay device, and the first communication device, and the beam training method includes:

transmitting a plurality of beam training signal sets to the relay device, each beam training signal set comprising a beam training procedure indication signal and a plurality of beam training signals: the plurality of beam training signal sets are used for the relay device to determine a target beam training signal from the plurality of beam training signal sets based on signal power, and forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

In a third aspect, a beam training method is provided, where the method is used in a second communication device responding to a beam training procedure in a millimeter wave communication system, where the millimeter wave communication system includes a first communication device initiating the beam training procedure, a relay device, and the second communication device, and the beam training method includes:

receiving a target beam training signal sent by the relay equipment, and responding to a beam training process initiated by the first communication equipment based on the target beam training signal; the target beam training signal is determined by the relay device based on signal power in a received plurality of beam training signal sets sent by the first communication device, and the beam training signal set comprises a beam training procedure indication signal and a plurality of beam training signals.

In a fourth aspect, a beam training apparatus is provided, which is used in a relay device of a millimeter wave communication system, where the millimeter wave communication system includes a first communication device initiating a beam training procedure, a second communication device responding to the beam training procedure, and the relay device, and the beam training apparatus includes:

and the receiving module is used for receiving the millimeter wave communication signal set sent by the first communication device.

The detection module is configured to detect whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal, where the beam training signal set includes a plurality of beam training signals.

A first determining module for determining a target beam training signal from the plurality of sets of beam training signals transmitted by the first communication device based on signal power.

A forwarding module, configured to forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

In a fifth aspect, a beam training apparatus is provided, where the apparatus is used in a first communication device initiating a beam training procedure in a millimeter wave communication system, where the millimeter wave communication system includes a second communication device responding to the beam training procedure, a relay device, and the first communication device, and the beam training apparatus includes:

a sending module, configured to send multiple beam training signal sets to the relay device, where each beam training signal set includes a beam training procedure indication signal and multiple beam training signals. The plurality of beam training signal sets are used for the relay device to determine a target beam training signal from the plurality of beam training signal sets based on signal power, and forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

In a sixth aspect, a beam training apparatus is provided, where the beam training apparatus is used in a second communication device responding to a beam training procedure in a millimeter wave communication system, where the millimeter wave communication system includes a first communication device initiating the beam training procedure, a relay device, and the second communication device, and the beam training apparatus includes:

and the receiving module is used for receiving the target beam training signal sent by the relay equipment.

A response module, configured to respond to a beam training procedure initiated by the first communication device based on the target beam training signal.

The target beam training signal is determined by the relay device based on signal power in a received plurality of beam training signal sets sent by the first communication device, and the beam training signal set includes a beam training procedure indication signal and a plurality of beam training signals.

In a seventh aspect, there is provided a communication device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, implements the beam training method according to any of the first to third aspects.

In an eighth aspect, a millimeter wave communication system is provided, which includes a first communication device initiating a beam training procedure, a second communication device responding to the beam training procedure, and a relay device;

the first communication device is configured to perform the beam training method performed by the first communication device according to any one of the first to third aspects;

the second communications device, configured to perform the beam training method performed by the second communications device according to any one of the first to third aspects;

the relay device is configured to perform the beam training method performed by the relay device according to any one of the first aspect to the third aspect.

In a ninth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a beam training method as described in any of the first to third aspects above.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the method includes that a relay device receives a millimeter wave communication signal set sent by a first communication device initiating a beam training process, and detects whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training process indication signal, the relay device can determine a target beam training signal from a plurality of beam training signal sets sent by the first communication device based on signal power, and then the relay device can forward the target beam training signal to a second communication device responding to the beam training process, wherein the target beam training signal is used for the second communication device to respond to the beam training process initiated by the first communication device, so that a method for performing beam training in the case that a millimeter wave communication system includes the relay device is provided.

Drawings

FIG. 1 is a schematic diagram of an implementation environment provided by an embodiment of the present application;

fig. 2 is a schematic diagram of a base station transmitting sector, a base station receiving sector, a base station transmitting sub-sector, and a base station receiving sub-sector according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a relay receiving sector according to an embodiment of the present application;

fig. 4 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a beam training signal set according to an embodiment of the present application;

fig. 6 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 7 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 8 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 9 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 10 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 11 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 12 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 13 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 14 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 15 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 16 is a flowchart of a beam training method according to an embodiment of the present application;

fig. 17 is a block diagram of a beam training apparatus according to an embodiment of the present application;

fig. 18 is a block diagram of another beam training apparatus according to an embodiment of the present application;

fig. 19 is a block diagram of another beam training apparatus according to an embodiment of the present application;

fig. 20 is a block diagram of another beam training apparatus according to an embodiment of the present application;

fig. 21 is a block diagram of another beam training apparatus according to an embodiment of the present application

Fig. 22 is a block diagram of a communication device according to an embodiment of the present application;

fig. 23 is a block diagram of a relay device according to an embodiment of the present application;

fig. 24 is a schematic diagram of a millimeter wave communication system according to an embodiment of the present application;

fig. 25 is a schematic diagram of a millimeter wave communication system according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In order to make the reader easily understand the technical solutions provided in the embodiments of the present application, the following briefly describes the overall technical context of the embodiments of the present application.

With the rapid increase of the number of wireless devices and mobile traffic, the existing spectrum resources are already approaching to saturation, so currently, both 3GPP and IEEE are concerned about using a millimeter wave frequency band (mmwave frequency band) to obtain more abundant available spectrum resources, and in practical application, the millimeter wave frequency band may be applied to the fields of car networking, industrial internet of things, or military industry, etc.

However, the millimeter wave band suffers from path fading several tens or even hundreds times larger than the low frequency band (Sub-6 GHz), which presents a great challenge to the utilization of the millimeter wave band. In order to solve the above problems, the scholars in the industry propose a large-scale antenna array (massive MIMO) technology, which is one of the key technologies applied to the millimeter wave band. Since the size of the antenna is proportional to the signal wavelength and the millimeter wave band has a smaller wavelength, the massive MIMO can be easily arranged in the communication device of the millimeter wave communication system without occupying too much space.

In the beamforming technology, a transmitting end of a millimeter wave communication system can transmit a communication signal to the direction of a certain transmitting sector in a beam form, so that transmitted power is converged on the sector relatively intensively, and meanwhile, a receiving end of the millimeter wave communication system can also receive the communication signal in the direction of a certain receiving sector, so that directional communication can be realized through the beamforming technology, and path loss can be well offset.

In practical application, by adopting a beam forming technology, beam training is required, and both a transmitting end and a receiving end of a millimeter wave communication system can obtain an optimal transceiving sector through the beam training.

In addition, the millimeter wave communication system often encounters a complex geographical environment, in other words, in practical applications, obstacles often block communication devices of the millimeter wave communication system, and the obstacles block communication devices, which may cause severe signal fading to a millimeter wave frequency band.

Currently, 3GPP does not define too many protocol standards for relay devices, which results in that there is currently no mature beam training method in the case of a millimeter wave communication system including a relay device.

In view of this, embodiments of the present application provide a beam training method, in which a relay device receives a millimeter wave communication signal set sent by a first communication device initiating a beam training procedure, and detects whether the millimeter wave communication signal set is the beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal, the relay device may determine a target beam training signal from multiple beam training signal sets sent by the first communication device based on signal power, and then the relay device may forward the target beam training signal to a second communication device responding to the beam training procedure, where the target beam training signal is used for the second communication device to respond to the beam training procedure initiated by the first communication device, so that a method of performing beam training in a case where the millimeter wave communication system includes the relay device is provided.

In addition, in order to make the reader easily understand the technical solutions provided by the embodiments of the present application, the following briefly explains the implementation environments related to the embodiments of the present application and the noun concept based on the implementation environments.

1. An implementation environment.

Referring to fig. 1, the implementation environment may be a millimeter wave communication system, and the millimeter wave communication system may include a base station 101, a relay device 102, and a User Equipment (UE) 103, where the base station 101 and the UE 103 may both communicate with the relay device 102 through a wireless communication link in a millimeter wave frequency band, and the base station 101 may also communicate with the UE 103 through a wireless communication link in a low frequency band.

It should be noted that, in some possible cases, a base station in the millimeter wave communication system may also be referred to as an AP, and a UE may also be referred to as an STA. It should be further noted that, in the millimeter wave communication system, the base station 101 may serve as a transmitting end or a receiving end, and similarly, the UE 103 may serve as a transmitting end or a receiving end.

2. The term concept.

1. And (4) beam training.

The beam training is a process of obtaining an optimal transceiving sector by both a transmitting end and a receiving end of the millimeter wave communication system, and can also be regarded as a process of beam pairing.

In general, the beam training may include an uplink beam training procedure and a downlink beam training procedure. The uplink beam training process may include an uplink wide beam training process and an uplink narrow beam training process, and the downlink beam training process may include a downlink wide beam training process and a downlink narrow beam training process.

Generally, the base station can determine the optimal base station receiving sector through the uplink wide-beam training process, and the base station can determine the optimal base station receiving sub-sector through the uplink narrow-beam training process. The base station can determine the optimal base station sending sector through the downlink wide beam training process, and the base station can determine the optimal base station sending sub-sector through the downlink narrow beam training process.

In the embodiment of the application, under the condition that the relay device is arranged between the base station and the UE, the relay device can determine the optimal relay receiving sector for millimeter wave communication with the UE through the uplink wide beam training process, and the relay device can determine the optimal relay receiving sector for millimeter wave communication with the base station through the downlink wide beam training process.

It should be noted that the UE may generally initiate an uplink beam training procedure, and the base station responds to the uplink beam training procedure, and the base station may generally initiate a downlink beam training procedure, and the UE responds to the downlink beam training procedure.

2. A base station transmit sector, a base station receive sector, a base station transmit sub-sector, and a base station receive sub-sector.

As shown in fig. 2, the spatial domain of a base station may be partitioned into N sectors, where each sector may be partitioned into M sub-sectors, N and M each being an integer greater than 1.

In downlink data transmission, the N sectors may be referred to as base station transmit sectors, and M sub-sectors in each sector may be referred to as base station transmit sub-sectors, and in uplink data transmission, the N sectors may be referred to as base station receive sectors, and M sub-sectors in each sector may be referred to as base station receive sub-sectors.

As described above, through the uplink beam training process and the downlink beam training process, the base station may determine the optimal base station receiving sector and the optimal base station transmitting sector from the N sectors, or may determine the optimal base station receiving sub-sector from the M sub-sectors included in the optimal base station receiving sector and determine the optimal base station transmitting sub-sector from the M sub-sectors included in the optimal base station transmitting sector.

After the beam training, the base station may receive millimeter wave communication data on an optimal base station receive sub-sector of the optimal base station receive sector, and the base station may transmit millimeter wave communication data on an optimal base station transmit sub-sector of the optimal base station transmit sector.

3. The relay receives the sector.

As shown in fig. 3, the spatial domain of the relay device may be divided into K sectors, which may be referred to as relay reception sectors, K being an integer greater than 1.

As described above, through the downlink wide beam training process and the uplink wide beam training process, the relay device may determine an optimal relay receiving sector for millimeter wave communication with the base station from the K sectors, or may determine an optimal relay receiving sector for millimeter wave communication with the UE from the K sectors.

After the beam training, the relay device may receive the millimeter wave communication data transmitted by the base station in an optimal relay receiving sector in millimeter wave communication with the base station, and may receive the millimeter wave communication data transmitted by the UE in an optimal relay receiving sector in millimeter wave communication with the UE.

Referring to fig. 4, a flowchart of a beam training method provided by the embodiment of the present application is shown, where the beam training method can be applied to the relay device 102 in the foregoing implementation environment. As shown in fig. 4, the beam training method may include the steps of:

step 401, the relay device receives a millimeter wave communication signal set sent by the first communication device, and detects whether the millimeter wave communication signal set is a beam training signal set according to whether the received millimeter wave communication signal set includes a beam training procedure indication signal.

In an embodiment of the present invention, in the downlink beam training process, the first communication device is a base station, and in the uplink beam training process, the first communication device is a UE.

The relay device may receive a set of millimeter-wave communication signals transmitted by the first communication device, where the set of millimeter-wave communication signals may include a plurality of millimeter-wave communication signals. For a set of received millimeter wave communication signals, the relay device may determine whether the set of millimeter wave communication signals is a set of beam training signals.

In the following, the embodiments of the present application will briefly describe a beam training signal set.

Referring to fig. 5, the beam training signal set may include a plurality of beam training signals s1, s2, s3, ...sr, and the beam training signal set may further include a beam training procedure indication signal z.

In a possible implementation manner, the beam training signals in the beam training signal set may be pseudo random sequence signals, and the beam training signals in the same beam training signal set are independent of each other.

In another possible implementation manner, the beam training signal in the beam training signal set may be an SSB signal, where the time domain length of the SSB signal is 4 OFDM (Orthogonal frequency-division multiplexing) symbols, and the frequency domain width is 20 frequency domain resource blocks.

A Synchronization Signal and PBCH block (SSB), which is composed of Primary Synchronization Signals (PSS), secondary Synchronization Signals (SSS), and the like.

In an optional embodiment of the present application, the beam training procedure indication signal may also be a pseudo-random sequence, for example, the beam training procedure indication signal may be a Zadofffchu (ZC) sequence, and when both the beam training signal and the beam training procedure indication signal are pseudo-random sequences, each beam training signal and each beam training procedure indication signal in the same beam training signal set are independent of each other.

In an optional embodiment of the present application, the beam training procedure indication signal is a pseudo random sequence signal obtained by performing cyclic shift processing on an original fixed sequence signal, where the original fixed sequence signal may be a sequence signal agreed by a relay device, a base station, and a UE, and the original fixed sequence signal may be stored locally in the relay device.

In an optional embodiment of the present application, the beam training procedure indication signal may include a wide beam training procedure indication signal and a narrow beam training procedure indication signal, where the wide beam training procedure indication signal is a pseudo-random sequence signal obtained by performing a first cyclic shift process on an original fixed sequence signal, and the narrow beam training procedure indication signal is a pseudo-random sequence signal obtained by performing a second cyclic shift process on the original fixed sequence signal.

In an optional embodiment of the present application, the beam training procedure indication signal may be located in a guard interval of uplink and downlink timeslot switching.

For convenience of description, a beam training signal set transmitted by the base station in the downlink wide beam training process and a beam training signal set transmitted by the UE in the uplink beam training process are collectively referred to as a wide beam training signal set, and a beam training signal set transmitted by the base station in the downlink narrow beam training process is referred to as a narrow beam training signal set. Wherein the wide beam training signal set may include a wide beam training procedure indication signal and the narrow beam training signal set may include a narrow beam training procedure indication signal.

In this embodiment, a beam training signal in a wide beam training signal set sent by a base station in a downlink wide beam training process may be referred to as a downlink wide beam training signal, a beam training signal in a wide beam training signal set sent by a UE in an uplink wide beam training process may be referred to as an uplink wide beam training signal, and a beam training signal in a narrow beam training signal set sent by a base station in a downlink narrow beam training process may be referred to as a downlink narrow beam training signal.

As described above, since the beam training signal set may include the beam training procedure indication signal. Therefore, after receiving the millimeter wave communication signal set sent by the first communication device, the relay device may determine whether the millimeter wave communication signal set is a beam training signal set by detecting whether the millimeter wave communication signal set includes a beam training procedure indication signal.

Step 402, the relay device determines a target beam training signal from a plurality of beam training signal sets transmitted by the first communication device based on the signal power.

Step 403, the relay device forwards the target beam training signal to the second communication device.

The target beam training signal is used for the second communication device to respond to the beam training procedure initiated by the first communication device.

Next, in the embodiment of the present application, an alternative technical process of each step shown in fig. 4 will be briefly described from two aspects, namely, an uplink beam training process and a downlink beam training process.

1. And (5) a downlink beam training process.

1.1, a downlink wide beam training process.

Referring to fig. 6, in the downlink wide beam training process, step 401 may specifically include the following steps:

step 601, the relay device receives the millimeter wave communication signal sets sent by the base station in K relay receiving sectors respectively.

Step 602, the relay device determines whether the millimeter wave communication signal set received at each relay receiving sector is a wide-beam training signal set according to whether the millimeter wave communication signal set includes a wide-beam training procedure indication signal.

The wide-beam training signal set sent by the base station includes N downlink wide-beam training signals sent by the base station in N base station sending sectors.

Next, in the embodiment of the present application, a technical process of determining, by a relay device, whether a received millimeter wave communication signal set is a wide beam training signal set will be briefly described, where the technical process includes steps A1 to D1.

A1, the relay device intercepts candidate communication signals at a target time domain position in a time domain range corresponding to the millimeter wave communication signal set.

In an optional embodiment of the present application, the relay device may intercept a candidate communication signal with a target length from an end of a time domain range corresponding to the millimeter wave communication signal set, where the target length is a time domain length of the beam training procedure indication signal.

And B1, the relay equipment acquires a power time delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal.

The relay device may perform fourier transform processing on the candidate communication signal to obtain a candidate communication signal after the fourier transform processing, and then the relay device may perform correlation value calculation on the candidate communication signal after the fourier transform processing and the original fixed sequence signal to obtain a target communication signal, and then the relay device may perform inverse fourier transform processing on the target communication signal to obtain the power delay map.

And C1, the relay equipment detects whether the candidate communication signal is a wide beam training process indicating signal or not based on the power delay map.

In an optional embodiment of the present application, the relay device may detect whether a peak value exceeding a first preset threshold exists in a first observation window of the power delay profile, where the first observation window is obtained according to the above-mentioned first cyclic shift process, and if the peak value exceeding the first preset threshold exists in the first observation window of the power delay profile, the relay device may determine that the candidate communication signal is a wide beam training procedure indication signal.

D1, the relay equipment determines whether the millimeter wave communication signal set is a wide-beam training signal set according to the detection result.

And if the candidate communication signal is the wide beam training process indication signal, the millimeter wave communication signal set is the wide beam training signal set, otherwise, if the candidate communication signal is not the wide beam training process indication signal, the millimeter wave communication signal set is not the wide beam training signal set.

In this embodiment of the application, in the downlink wide beam training process, the relay device may further determine an optimal relay receiving sector K1 where the relay device performs millimeter wave communication with the base station, based on the wide beam training signal sets respectively received at the K relay receiving sectors.

Referring to fig. 7, the technical process of the relay device determining the optimal relay receiving sector K1 for the relay device to perform millimeter wave communication with the base station may include the following steps:

step 701, the relay device determines a power value of a wide beam training signal set transmitted by the base station and received in each relay receiving sector.

In an alternative embodiment of the present application, for each relay receiving sector, the relay device may obtain a power value of each downlink wide beam training signal in the set of wide beam training signals transmitted by the base station and received by the relay receiving sector, and use the sum of the power values of each downlink wide beam training signal as the power value of the set of wide beam training signals transmitted by the base station and received by the relay device at the relay receiving sector.

Step 702, the relay device uses the relay receiving sector corresponding to the target wide beam training signal set with the highest power value as the optimal relay receiving sector K1 for the relay device to perform millimeter wave communication with the base station.

In the downlink wide beam training process, the target beam training signal may be a target downlink wide beam training signal, and step 402 may specifically include:

the relay device takes the downlink wide beam training signal with the highest power value in the N downlink wide beam training signals included in the target wide beam training signal set as the target downlink wide beam training signal. In step 403, the relay device may forward the target downlink wide beam training signal to the UE. The target downlink wide-beam signal is used for enabling the UE to respond to a beam training process initiated by the base station according to the target downlink wide-beam training signal, so that the base station determines the optimal base station sending sector N1 for millimeter wave communication between the base station and the relay equipment according to the response of the UE.

It should be noted that, for the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink wide beam training signal, and the technical process in which the base station determines the optimal base station sending sector N1 for the base station to perform millimeter wave communication with the relay device according to the response of the UE, details are described in the following embodiments, which are not mentioned here in the embodiments of the present application.

1.2, a downlink narrow beam training process.

Referring to fig. 8, in the downlink narrow beam training process, step 401 may specifically include the following steps:

step 801, the relay device receives the millimeter wave communication signal set sent by the base station in the optimal relay receiving sector K1 where the relay device performs millimeter wave communication with the base station.

Step 802, the relay device determines whether the millimeter wave communication signal set sent by the base station is a narrow beam training signal set according to whether the millimeter wave communication signal set includes a narrow beam training procedure indication signal.

The narrow beam training signal set comprises M downlink narrow beam training signals sent by the base station in M base stations sending sub-sectors, and the M base stations sending sub-sectors are sub-sectors in an optimal base station sending sector N1 where the base station and the relay equipment carry out millimeter wave communication.

In the following, a technical process of determining, by a relay device, whether a received millimeter wave communication signal set is a narrow beam training signal set will be briefly described in the embodiment of the present application, where the technical process includes steps A2 to D2.

And A2, the relay device intercepts the candidate communication signals at the target time domain position in the time domain range corresponding to the millimeter wave communication signal set.

And B2, the relay equipment acquires a power time delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal.

And C2, the relay equipment detects whether the candidate communication signal is a narrow beam training process indication signal or not based on the power delay map.

In an optional embodiment of the present application, the relay device may detect whether a peak exceeding a second preset threshold exists in a second observation window of the power delay profile, where the second observation window corresponds to the second cyclic shift processing described above, and if a peak exceeding the second preset threshold exists in the second observation window of the power delay profile, the relay device may determine that the candidate communication signal is a narrow beam training procedure indication signal.

D2, the relay equipment determines whether the millimeter wave communication signal set is a narrow beam training signal set according to the detection result.

And if the candidate communication signal is the narrow beam training process indication signal, the millimeter wave communication signal set is the narrow beam training signal set, otherwise, if the candidate communication signal is not the narrow beam training process indication signal, the millimeter wave communication signal set is not the narrow beam training signal set.

Referring to fig. 9, in the downlink narrow beam training process, the target beam training signal includes a target downlink narrow beam training signal, and step 402 may specifically include the following steps:

step 901, sequentially detecting whether the power value of each downlink narrow beam training signal is greater than a first power threshold value or not for M downlink narrow beam training signals in a narrow beam training signal set received in an optimal relay receiving sector K1 where the relay device and the base station perform millimeter wave communication.

The first power threshold is a product of a power value of the target downlink wide beam training signal and a first preset threshold coefficient. It should be noted that the first preset threshold coefficient may be preset, and the embodiment of the present application is not limited to this specifically,

step 902, if it is detected that the power value of the p downlink narrow beam training signals is greater than a first power threshold, determining q downlink narrow beam training signals from the p downlink narrow beam training signals, and taking the q downlink narrow beam training signals as target downlink narrow beam training signals, where p is a positive integer and q is a positive integer less than or equal to p.

In practical application, the number M of downlink narrow beam training signals included in the narrow beam training signal set is usually larger, and therefore, in order to reduce the complexity of the relay device and calculate the time delay, in the embodiment of the present application, the relay device may determine a first power threshold instead of counting the power value of each downlink narrow beam training signal in the narrow beam training signal set, and when the number of downlink narrow beam training signals whose power values are greater than the first power threshold reaches p, the relay device may stop counting the power values of the downlink narrow beam training signals included in the narrow beam training signal set, determine q downlink narrow beam training signals from the p downlink narrow beam training signals, and use the q downlink narrow beam training signals as the target downlink narrow beam training signals.

In an optional embodiment of the present application, the relay device may rank the p downlink narrow-beam training signals in order of a power value from high to low, and determine, according to a ranking result, the first q downlink narrow-beam training signals from the p downlink narrow-beam training signals.

After determining the target downlink narrowbeam training signal, in step 403, the relay device may forward the target downlink narrowbeam training signal to the UE, where the target downlink narrowbeam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink narrowbeam training signal, so that the base station determines, according to the response of the UE, that the optimal base station for performing millimeter wave communication between the base station and the relay device sends the sub-sector M1.

It should be noted that, the technical process of the UE responding to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal, and the technical process of the base station determining the optimal base station sending sub-sector M1 for the base station to perform millimeter wave communication with the relay device according to the response of the UE are described in the following embodiments, which are not mentioned here in advance.

As can be seen from the above description of the downlink beam training process, in the downlink beam training process, the base station may determine an optimal base station transmission sector N1 and an optimal base station transmission sub-sector M1, where the base station itself performs millimeter wave communication with the relay device, and the relay device may determine an optimal relay reception sector K1, where the relay device itself performs millimeter wave communication with the base station.

2. And (5) an uplink beam training process.

2.1, an uplink wide beam training process.

Referring to fig. 10, in the uplink wide beam training process, step 401 may specifically include the following steps:

and step 1001, the relay device receives the millimeter wave communication signal sets sent by the UE in the K relay receiving sectors respectively.

Step 1002, the relay device determines whether the millimeter wave communication signal set received in each relay receiving sector is a wide-beam training signal set according to whether the millimeter wave communication signal set includes a wide-beam training procedure indication signal.

The wide beam training signal set sent by the UE includes L uplink wide beam training signals, where L is a positive integer greater than 1. Wherein, the L uplink wide beam training signals are all transmitted by the UE omnidirectionally.

It should be noted that the technical process of the relay device determining whether the received millimeter wave communication signal set is the wide beam training signal set is the same as that described in the embodiment shown in fig. 6, and details of the embodiment of the present application are not repeated herein.

In this embodiment of the application, in the uplink wide beam training process, the relay device may further determine an optimal relay receiving sector K2 where the relay device performs millimeter wave communication with the UE, based on a wide beam training signal set sent by the UE and received in the K relay receiving sectors, respectively.

Referring to fig. 11, the technical process of the relay device determining the optimal relay receiving sector K2 for the relay device to perform millimeter wave communication with the UE may include the following steps:

step 1101, the relay device determines the power value of the wide beam training signal set transmitted by the UE received in each relay receiving sector.

In an optional embodiment of the present application, for each relay receiving sector, the relay device may obtain a power value of each uplink wide beam training signal in the wide beam training signal set transmitted by the UE and received in the relay receiving sector, and use the sum of the power values of each uplink wide beam training signal as the power value of the wide beam training signal set transmitted by the UE and received by the relay device in the relay receiving sector.

Step 1102, the relay device uses the relay receiving sector corresponding to the target wide beam training signal set with the highest power value as an optimal relay receiving sector K2 for the relay device to perform millimeter wave communication with the UE.

In the uplink wide beam training process, the target beam training signal may be a target uplink wide beam training signal, and step 402 may specifically include the following steps:

the relay device takes the L uplink wide beam training signals included in the target wide beam training signal set as target uplink wide beam training signals. In step 403, the relay device may forward the target uplink wide beam training signal (i.e., the L uplink wide beam training signals included in the target wide beam training signal set) to the base station.

The target uplink wide beam training signal is used for the base station to determine an optimal base station receiving sector N2 and an optimal base station receiving sub-sector M2, wherein the optimal base station receiving sector N2 and the optimal base station receiving sub-sector M2 are used for millimeter wave communication between the base station and the relay device according to the target uplink wide beam training signal.

It should be noted that, the technical process of the base station determining the optimal base station receiving sector N2 and the optimal base station receiving sub-sector M2 for performing millimeter wave communication with the relay device according to the target uplink wide beam training signal is described in detail in the following embodiments, which is not mentioned here first.

And 2.2, an uplink narrow beam training process.

In the embodiment of the application, the uplink narrow beam training process is mainly executed by the base station, and in the uplink narrow beam training process, the base station may determine, according to the target uplink wide beam training signal, an optimal base station receiving sub-sector M2 for performing millimeter wave communication with the relay device. As mentioned above, it is described in detail in the following examples, which are not mentioned here in advance.

As can be seen from the above description of the uplink beam training process, in the uplink beam training process, the base station may determine an optimal base station receiving sector N2 and an optimal base station receiving sub-sector M2, where the base station itself performs millimeter wave communication with the relay device, and the relay device may determine an optimal relay receiving sector K2, where the relay device itself performs millimeter wave communication with the UE.

The foregoing embodiment describes a technical process executed by a relay device in a beam training process, and in the following, this embodiment of the present application describes a technical process executed by a first communication device that initiates a beam training procedure in a beam training process, and as described above, the first communication device may be a base station or a UE in the implementation environment described above.

In this embodiment of the present application, in the beam training process, the technical process performed by the first communication device may include:

the first communication device transmits a plurality of beam training signal sets to the relay device, wherein each beam training signal set comprises a beam training procedure indication signal and a plurality of beam training signals.

The multiple beam training signal sets sent by the first communication device are used for the relay device to determine a target beam training signal from the multiple beam training signal sets based on the signal power, and forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

In the following, the embodiment of the present application will briefly describe an optional technical process performed by the first communication device, starting from two aspects, namely, an uplink beam training process and a downlink beam training process.

1. And (4) a downlink beam training process.

1.1, a downlink wide beam training process.

In the downlink beam training process, the first communication device may be a base station, and the second communication device may be a UE.

In the downlink wide beam training process, the base station may transmit a plurality of wide beam training signal sets to the relay device, where, as described above, each wide beam training signal set transmitted by the base station includes N downlink wide beam training signals transmitted by the base station in N base station transmission sectors, and each wide beam training signal set transmitted by the base station may further include a wide beam training procedure indication signal.

As can be seen from the embodiment corresponding to fig. 7, the relay device may determine the optimal relay receiving sector K1 where the relay device performs millimeter wave communication with the base station, based on the wide beam training signal sets sent by the base station and received in the K relay receiving sectors, respectively.

In addition, the relay device may also determine a target downlink wide beam training signal from a plurality of wide beam training sets transmitted by the base station, and forward the target downlink wide beam training signal to the UE. As described above, the target downlink wide beam signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink wide beam training signal, so that the base station determines, according to the response of the UE, the optimal base station transmission sector N1 where the base station and the relay device perform millimeter wave communication.

In the embodiment for explaining the technical process performed by the relay device, it is pointed out that the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink wide beam training signal, and the technical process in which the base station determines the optimal base station transmission sector N1 for performing millimeter wave communication between the base station and the relay device according to the response of the UE are described in the following embodiment.

First, when the downlink wide beam training signal is a pseudo random sequence signal, the base station may receive first wide beam indication information Iw transmitted by the UE, where the first wide beam indication information Iw is used to indicate a base station transmission sector corresponding to a target downlink wide beam training signal, and the base station may use the base station transmission sector indicated by the first wide beam indication information Iw as an optimal base station transmission sector N1 where the base station and the relay device perform millimeter wave communication.

It should be noted that, in practical applications, the base station may receive the first wide beam indication information Iw sent by the UE through forwarding by the relay device, or the base station may directly receive the first wide beam indication information Iw sent by the UE based on a wireless communication link in a low frequency band, which is not specifically limited in this embodiment of the present application.

In an optional embodiment of the present application, the first wide beam indication information Iw may be a sending sector number obtained according to the target downlink wide beam training signal, and the sending sector number may indicate a base station sending sector corresponding to the target downlink wide beam training signal.

Secondly, when the downlink wide beam training signal is an SSB signal, the base station may receive second wide beam indication information that is sent by the UE in a PRACH (Physical Random Access Channel) according to the target downlink wide beam training signal, the base station may determine a base station transmission sector corresponding to the target downlink wide beam training signal according to a time-frequency position of the second wide beam indication information in the PRACH, and then the base station may use the base station transmission sector corresponding to the target downlink wide beam training signal as an optimal base station transmission sector N1 for millimeter wave communication between the base station and the relay device.

1.2, a downlink narrow beam training process.

In the downlink narrow beam training process, the base station may send a narrow beam training signal set to the relay device, where the narrow beam training signal set includes M downlink narrow beam training signals that are sent by the sub-sectors to the relay device by the M base stations included in the optimal base station sending sector N1, and the narrow beam training signal set further includes a narrow beam training procedure indication signal, as described above.

As can be seen from the embodiment corresponding to fig. 9, the relay device may receive the narrow beam training signal set sent by the base station in the optimal relay receiving sector K1 performing millimeter wave communication with the base station, determine q downlink narrow beam training signals from the received narrow beam training signal set, and send the q downlink narrow beam training signals to the UE as target downlink narrow beam training signals.

As described above, the target downlink narrow beam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal, so that the base station determines, according to the response of the UE, the optimal base station transmission sub-sector M1 for the base station to perform millimeter wave communication with the relay device.

In the embodiment for explaining the technical process performed by the relay device, it is pointed out that the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal, and the technical process in which the base station determines the optimal base station transmission sub-sector M1 for the base station to perform millimeter wave communication with the relay device according to the response of the UE are described in the following embodiment, where this application embodiment is described in conjunction with the description of the above embodiment, and a mode in which the base station determines the optimal base station transmission sub-sector M1 for the base station to perform millimeter wave communication with the relay device according to the response of the UE is described with reference to fig. 12, and this mode may include the following steps:

step 1201, the base station receives narrow beam indication information In sent by the UE, where the narrow beam indication information In is used to indicate a sub-sector sent by the base station corresponding to the target downlink narrow beam training signal.

It should be noted that, in practical application, the base station may receive the narrow beam indication information In sent by the UE through forwarding by the relay device, and the base station may also directly receive the narrow beam indication information In sent by the UE based on a low frequency band wireless communication link, which is not specifically limited In this embodiment of the present application.

It is further noted that, as described above, the target downlink narrowbeam training signal may include q downlink narrowbeam training signals.

In a possible implementation manner, the UE may generate narrow beam indication information In for one of the q downlink narrow beam training signals, and In this case, the narrow beam indication information In may indicate a base station transmission sub-sector corresponding to the one of the q downlink narrow beam training signals.

For example, the UE may randomly select one downlink narrow beam training signal from the q downlink narrow beam training signals, and generate the narrow beam indication information In based on the randomly selected downlink narrow beam training signal.

For another example, the UE may select a downlink narrow beam training signal with the largest signal power from the q downlink narrow beam training signals, and generate the narrow beam indication information In based on the downlink narrow beam training signal with the largest signal power.

In another possible implementation manner, the UE may generate narrow beam indication information In for the q downlink narrow beam training signals, respectively, and In this case, each narrow beam indication information In may indicate a base station corresponding to each downlink narrow beam training signal In the q downlink narrow beam training signals to transmit a sub-sector.

In an optional embodiment of the present application, the narrow beam indication information In may be a sequence number of a sending sub-sector obtained according to a target downlink narrow beam training signal, and the sequence number of the sending sub-sector may indicate a base station sending sub-sector corresponding to the target downlink narrow beam training signal.

Step 1202, the base station uses the base station transmission sub-sector indicated by the narrow beam indication information In as an optimal base station transmission sub-sector M1 of the base station and the relay device for millimeter wave communication.

When the UE generates the narrow beam indication information In for one of the q downlink narrow beam training signals, the base station may use a base station transmission sub-sector corresponding to the one downlink narrow beam training signal indicated by the narrow beam indication information In as an optimal base station transmission sub-sector M1 where the base station performs millimeter wave communication with the relay device.

In the case that the UE generates the narrow beam indication information In for the q downlink narrow beam training signals, the base station may use all of the base station transmission sub-sectors indicated by the narrow beam indication information In as the optimal base station transmission sub-sector M1 for the base station to perform millimeter wave communication with the relay device, or the base station may select one base station transmission sub-sector from the base station transmission sub-sectors indicated by the narrow beam indication information In as the optimal base station transmission sub-sector M1 for the base station to perform millimeter wave communication with the relay device, for example, the base station may randomly select one base station transmission sub-sector from the base station transmission sub-sectors indicated by the narrow beam indication information In.

2. And (5) an uplink beam training process.

2.1 uplink wide beam training process.

In the uplink beam training process, the first communication device may be a UE, and the second communication device may be a base station.

In the uplink wide beam training process, the UE may transmit a plurality of sets of wide beam training signals to the relay device. According to the above, each wide beam training signal set transmitted by the UE includes L uplink wide beam training signals, and the L uplink wide beam training signals are all transmitted by the UE in an omnidirectional manner. In addition, each set of wide beam training signals transmitted by the UE may further include a wide beam training procedure indication signal.

As can be seen from the embodiment corresponding to fig. 11, the relay device may determine, based on the wide beam training signal sets sent by the UE and received in the K relay receiving sectors, an optimal relay receiving sector K2 where the relay device performs millimeter wave communication with the UE.

In addition, the relay device may further determine a target uplink wide beam training signal from a plurality of wide beam training sets transmitted by the UE, and forward the target uplink wide beam training signal to the base station. As described above, the target uplink wide beam signal is used for the base station to determine, according to the target uplink wide beam training signal, an optimal base station receiving sector N2 and an optimal base station receiving sub-sector M2, where the base station and the relay device perform millimeter wave communication.

It should be noted that, the detailed description of the following embodiments still needs to be given to the technical process of the base station determining the optimal base station receiving sector N2 and the optimal base station receiving sub-sector M2 for performing millimeter wave communication with the relay device according to the target uplink wide beam training signal, and the embodiments of the present application are not mentioned here.

And 2.2, an uplink narrow beam training process.

As described above, in the embodiment of the present application, the uplink narrow beam training process is mainly performed by the base station, and in the uplink narrow beam training process, the base station may determine, according to the target uplink wide beam training signal, an optimal base station receiving sector N2 where the base station performs millimeter wave communication with the relay device. As mentioned above, it is described in detail in the following examples, which are omitted here first.

The foregoing embodiment describes technical processes executed by a relay device and a first communication device initiating a beam training procedure in a beam training process, and hereinafter, this embodiment of the present application describes a technical process executed by a second communication device responding to the beam training procedure in the beam training process, and as described above, the second communication device may be a base station or a UE in the implementation environment described above.

Referring to fig. 13, in an embodiment of the present application, in the beam training process, the technical process performed by the second communication device may include:

step 1301, the second communication device receives a target beam training signal sent by the relay device.

Step 1302, the second communication device responds to the beam training procedure initiated by the first communication device based on the target beam training signal.

The target beam training signal is determined by the relay device based on signal power in a plurality of received beam training signal sets sent by the first communication device, and the beam training signal sets include a beam training procedure indication signal and a plurality of beam training signals.

In the following, the embodiment of the present application will briefly describe an optional technical process performed by the second communication device, starting from two aspects, namely, an uplink beam training process and a downlink beam training process.

1. And (5) a downlink beam training process.

1.1, a downlink wide beam training process.

In the downlink beam training process, the first communication device is a base station, and the second communication device is a UE.

As described above, in the downlink wide beam training process, the relay device may forward a target downlink wide beam training signal to the UE, where the target downlink wide beam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink wide beam training signal, so that the base station determines, according to the response of the UE, an optimal base station transmission sector N1 where the base station performs millimeter wave communication with the relay device.

In the embodiment for explaining the technical processes performed by the relay device and the first communication device, it is pointed out that the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal is described in detail in the following embodiment, where this application embodiment corresponds to the description of the above embodiment, and an implementation manner in which the UE responds to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal is described, where the implementation manner may include the following two manners.

First, when the downlink wide beam training signal is a pseudo random sequence signal, the UE generates first wide beam indication information Iw according to a target downlink wide beam training signal, where the first wide beam indication information Iw is used to indicate a base station transmission sector corresponding to the target downlink wide beam training signal. The UE may send the first wide beam indication information Iw to the base station, so that the base station may use the base station sending sector indicated by the first wide beam indication information Iw as an optimal base station sending sector N1 where the base station performs millimeter wave communication with the relay device.

It should be noted that, in practical applications, the UE may send the first wide beam indication information Iw to the base station through the forwarding of the relay device, or the UE may directly send the first wide beam indication information Iw to the base station based on the wireless communication link in the low frequency band, which is not specifically limited in this embodiment of the application.

Secondly, under the condition that the downlink wide-beam training signal is an SSB signal, the UE may generate second wide-beam indication information, determine a target time-frequency position in the PRACH according to the target downlink wide-beam training signal, and then transmit the second wide-beam indication information at the target time-frequency position, so that the base station determines a base station transmission sector corresponding to the target downlink wide-beam training signal based on the target time-frequency position, and uses the base station transmission sector corresponding to the target downlink wide-beam training signal as an optimal base station transmission sector N1 for the base station to perform millimeter wave communication with the relay device.

1.2, a downlink narrow beam training process.

In the downlink narrow beam training process, the relay device may forward the target downlink narrow beam training signal to the UE, where as described above, the target downlink narrow beam training signal may include q downlink narrow beam training signals, and the target downlink narrow beam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink narrow beam training signal, so that the base station determines, according to the response of the UE, an optimal base station sending sub-sector M1 where the base station and the relay device perform millimeter wave communication.

In the embodiment of describing the technical processes performed by the relay device and the first communication device, it is pointed out that the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink narrowbeam training signal is described in the following embodiments, where the embodiments of the present application correspond to the description of the above embodiments, and the technical process in which the UE responds to the beam training procedure initiated by the base station according to the target downlink narrowbeam training signal is described with reference to fig. 14, which may include the following steps:

step 1401, the UE generates narrow beam indication information In according to the target downlink narrow beam training signal, where the narrow beam indication information In is used to indicate a base station corresponding to the target downlink narrow beam training signal to transmit a sub-sector.

As described above, in one possible implementation manner, the UE may generate narrow beam indication information In for one of the q downlink narrow beam training signals, in which case the narrow beam indication information In may indicate a base station transmission sub-sector corresponding to one of the q downlink narrow beam training signals.

Step 1402, the UE sends the narrow beam indication information to the base station, so that the base station uses the base station sending sub-sector indicated by the narrow beam indication information as an optimal base station sending sub-sector M1 for the base station to perform millimeter wave communication with the relay device.

It should be noted that, in practical applications, the UE may send the narrow beam indication information In to the base station through forwarding of the relay device, and the UE may also directly send the narrow beam indication information In to the base station based on a low frequency band wireless communication link, which is not specifically limited In this embodiment of the present application.

As can be seen from the above description of the downlink beam training process, in the downlink beam training process, the base station may determine the optimal base station transmission sector N1 and the optimal base station transmission sub-sector M1, which are in millimeter wave communication with the relay device.

2. And (5) an uplink beam training process.

2.1 uplink wide beam training process.

In the uplink wide beam training process, the relay device may forward the target uplink wide beam training signal to the base station, where the target uplink wide beam signal is used for the base station to determine, according to the target uplink wide beam training signal, an optimal base station receiving sector N2 and an optimal base station receiving sub-sector M2, where the base station performs millimeter wave communication with the relay device.

In the embodiment for explaining the technical processes executed by the relay device and the first communication device, it is noted that the technical process of the base station determining the optimal base station receiving sector N2 and the optimal base station receiving sub-sector M2 for the base station to perform millimeter wave communication with the relay device according to the target uplink wide beam training signal is described in detail in the following embodiment, where this application embodiment is described in correspondence with the above embodiment, and the technical process of the base station determining the optimal base station receiving sector N2 for the base station to perform millimeter wave communication with the relay device according to the target uplink wide beam training signal is described with reference to fig. 15, and the technical process may include the following steps:

step 1501, the base station receives the target uplink wide beam training signals sent by the relay device in N base station receiving sectors, and determines power values of the target wide beam training signals received in each base station receiving sector.

As described above, the target uplink wide beam training signal includes L uplink wide beam training signals in the set of target wide beam training signals transmitted by the UE.

For each base station receiving sector, the base station may obtain a power value of each uplink wide beam training signal in the L uplink wide beam training signals transmitted by the relay device received in the base station receiving sector, and use the power value of each uplink wide beam training signal as the power value of the target uplink wide beam training signal received by the base station in the base station receiving sector.

Step 1502, the base station takes the base station receiving sector corresponding to the target uplink wide-beam training signal with the highest power value as the optimal base station receiving sector N2 for the base station to perform millimeter wave communication with the relay device.

And 2.2, an uplink narrow beam training process.

As described above, the base station may further determine, according to the target uplink wide beam training signal, an optimal base station receiving sub-sector M2 for the base station to perform millimeter wave communication with the relay device, and referring to fig. 16, the technical process for the base station to determine the optimal base station receiving sub-sector M2 may include the following steps:

step 1601, the base station continues to receive the target uplink wide beam training signal sent by the relay device in M base station receiving sub-sectors included in the optimal base station receiving sector N2.

Step 1602, the base station sequentially detects whether the power value of the target uplink wide beam training signal received in the M base station receiving sub-sectors is greater than a second power threshold.

As described above, the target uplink wide beam training signals include L uplink wide beam training signals in the set of target wide beam training signals transmitted by the UE.

For each base station reception sub-sector, the base station may obtain a power value of each uplink wide beam training signal among the L uplink wide beam training signals transmitted by the relay device received at the base station reception sub-sector, and use the power value of each uplink wide beam training signal as a power value of a target uplink wide beam training signal received at the base station reception sub-sector by the base station.

In an optional embodiment of the present application, the base station may use a product of a power value of the target uplink wide beam training signal corresponding to the optimal base station receiving sector and a second preset threshold coefficient as the second power threshold.

Step 1603, if it is detected that the power values of the j target uplink wide beam training signals received in the M base station receiving sub-sectors are greater than a second power threshold, the base station acquires f target uplink wide beam training signals in the j target uplink wide beam training signals, wherein j is a positive integer, and f is a positive integer less than or equal to j.

In an optional embodiment of the present application, the base station may rank the j target uplink wide beam training signals in order of a power value from high to low, and obtain f target uplink wide beam training signals before the ranking.

In step 1604, the base station uses the base station receiving sub-sector corresponding to the target uplink wide-beam training signal with the highest power value in the f target uplink wide-beam training signals as an optimal base station receiving sub-sector M2 for the base station to perform millimeter wave communication with the relay device.

In practical applications, the number M of base station receiving sub-sectors included in the base station receiving sector is usually larger, and therefore, in order to reduce the complexity of the base station and calculate the time delay, in this embodiment of the application, the base station may determine a second power threshold value instead of counting the power value of the target uplink wide beam training signal received in each of the M base station receiving sub-sectors included in the optimal base station receiving sector N2, and when the counted number of the target uplink wide beam training signals with the power value larger than the second power threshold value reaches j, may stop counting the power value of the target uplink wide beam training signal received in the base station receiving sub-sector, determine f target uplink wide beam training signals from the j target uplink wide beam training signals, and use the base station receiving sub-sector corresponding to the target uplink beam training signal with the highest power value in the f target uplink wide beam training signals as the optimal base station receiving sub-sector M2 for millimeter wave communication between the base station and the relay device.

Referring to fig. 17, a block diagram of a beam training apparatus 1700 according to an embodiment of the present application is shown, where the beam training apparatus 1700 may be configured in a relay device. As shown in fig. 17, the beam training apparatus 1700 may include: a receiving module 1701, a detecting module 1702, a first determining module 1703, and a forwarding module 1704.

The receiving module 1701 is configured to receive the millimeter wave communication signal set sent by the first communication device.

The detecting module 1702 is configured to detect whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal, where the beam training signal set includes a plurality of beam training signals.

A first determining module 1703, configured to determine a target beam training signal from the plurality of beam training signal sets transmitted by the first communication device based on signal power.

A forwarding module 1704, configured to forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to the beam training procedure initiated by the first communication device.

In an optional embodiment of the present application, the receiving module 1701 is specifically configured to: receiving the millimeter wave communication signal set sent by the first communication device at K relay receiving sectors of the relay device respectively;

the detecting module 1702 is specifically configured to determine whether the millimeter wave communication signal set is a wide beam training signal set according to whether the millimeter wave communication signal set includes a wide beam training procedure indication signal, where the wide beam training signal set includes a plurality of wide beam training signals, and K is a positive integer greater than 1.

In an optional embodiment of the present application, the indication signal of the wide beam training procedure is a pseudo-random sequence signal obtained by performing a first cyclic shift process on an original fixed sequence signal, and the detecting module 1702 is specifically configured to: intercepting candidate communication signals at a target time domain position in a time domain range corresponding to the millimeter wave communication signal set; and acquiring a power delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal, detecting whether the candidate communication signal is the wide beam training process indication signal or not based on the power delay map, and determining whether the millimeter wave communication signal set is the wide beam training signal set or not according to the detection result.

In an optional embodiment of the present application, the detecting module 1702 is specifically configured to: detecting whether a peak value exceeding a first preset threshold value exists in a first observation window of the power delay map, wherein the first observation window is determined according to the first cyclic shift processing; if a peak value exceeding the first preset threshold value exists in the first observation window of the power time delay map, determining that the candidate communication signal is the wide-beam training process indication signal.

Referring to fig. 18, an embodiment of the present application further provides another beam training apparatus 1800, where the beam training apparatus 1800 may further include a second determining module 1705 in addition to the modules included in the beam training apparatus 1700.

The second determining module 1705 is configured to determine an optimal relay receiving sector for the relay device to perform millimeter wave communication with the first communication device based on the wide beam training signal sets respectively received in the K relay receiving sectors.

In an optional embodiment of the present application, the second determining module 1705 is specifically configured to: determining power values of the wide beam training signal set received at each of the relay receive sectors; and taking the relay receiving sector corresponding to the target wide-beam training signal set with the highest power value as the optimal relay receiving sector for millimeter wave communication between the relay device and the first communication device.

In an optional embodiment of the present application, the first communication device is a base station, the second communication device is a UE, the target wide beam training signal set includes N downlink wide beam training signals sent by the base station in N base station sending sectors, where N is a positive integer greater than 1, the target beam training signal includes a target downlink wide beam training signal, and the first determining module 1703 is specifically configured to: taking the downlink wide beam training signal with the highest power value in the N downlink wide beam training signals included in the target wide beam training signal set as the target downlink wide beam training signal; the target downlink wide-beam signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink wide-beam training signal, so that the base station determines, according to the response of the UE, an optimal base station transmission sector for the base station to perform millimeter wave communication with the relay device.

In an optional embodiment of the present application, the first communication device is a UE, the second communication device is a base station, the target wide beam training signal set includes L uplink wide beam training signals sent by the UE, where L is a positive integer greater than 1, the target beam training signal includes a target uplink wide beam training signal, and the first determining module 1703 is specifically configured to: taking the L uplink wide beam training signals included in the target wide beam training signal set as the target uplink wide beam training signals; the target uplink wide beam training signal is used for the base station to determine an optimal base station receiving sector and an optimal base station receiving sub-sector for millimeter wave communication between the base station and the relay device according to the target uplink wide beam training signal.

In an optional embodiment of the present application, the detecting module 1702 is specifically configured to: receiving the millimeter wave communication signal set sent by the base station in an optimal relay receiving sector in which the relay device and the base station perform millimeter wave communication, and determining whether the millimeter wave communication signal set is a narrow beam training signal set according to whether the millimeter wave communication signal set includes a narrow beam training procedure indication signal, where the narrow beam training signal set includes M downlink narrow beam training signals sent by the base station in M base station sending sub-sectors, where the M base station sending sub-sectors are sub-sectors in an optimal base station sending sector in which the base station and the relay device perform millimeter wave communication, and M is a positive integer greater than 1.

In an optional embodiment of the present application, the narrow beam training procedure indication signal is a pseudo random sequence signal obtained by performing a second cyclic shift process on an original fixed sequence signal, and the detecting module 1702: intercepting candidate communication signals at a target time domain position in a time domain range corresponding to the millimeter wave communication signal set; and acquiring a power delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal, detecting whether the candidate communication signal is the narrow beam training process indication signal or not based on the power delay map, and determining whether the millimeter wave communication signal set is the narrow beam training signal set or not according to a detection result.

In an optional embodiment of the present application, the detecting module 1702 is specifically configured to: detecting whether a peak value exceeding a second preset threshold value exists in a second observation window of the power delay map, wherein the second observation window is determined according to the second cyclic shift processing; and if a peak value exceeding the second preset threshold value exists in the second observation window of the power delay map, determining the candidate communication signal as the narrow beam training process indication signal.

In an optional embodiment of the present application, the detecting module 1702 is specifically configured to: performing Fourier transform processing on the candidate communication signal to obtain a candidate communication signal after the Fourier transform processing; performing correlation value calculation on the candidate communication signal subjected to the Fourier transform and the original fixed sequence signal to obtain a target communication signal; and performing inverse Fourier transform processing on the target communication signal to obtain the power time delay map.

In an optional embodiment of the present application, the detecting module 1702 is specifically configured to: and intercepting the candidate communication signal with a target length from the end of the time domain range corresponding to the millimeter wave communication signal set, wherein the target length is the time domain length of the beam training process indication signal.

In an optional embodiment of the present application, the target beam training signal includes a target downlink narrow beam training signal, and the first determining module 1703 is specifically configured to: sequentially detecting whether the power value of each downlink narrow-beam training signal is greater than a first power threshold value or not for M downlink narrow-beam training signals in the narrow-beam training signal set received in an optimal relay receiving sector in which the relay device and the base station perform millimeter wave communication; if the power values of the p downlink narrow beam training signals are detected to be larger than the first power threshold value, determining q downlink narrow beam training signals from the p downlink narrow beam training signals, and taking the q downlink narrow beam training signals as the target downlink narrow beam training signal, wherein p is a positive integer, and q is a positive integer smaller than or equal to p; the target downlink narrow-beam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink narrow-beam training signal, so that the base station determines, according to the response of the UE, an optimal base station transmission sub-sector where the base station and the relay device perform millimeter wave communication.

In an optional embodiment of the present application, the first determining module 1703 is further configured to: and taking the product of the power value of the target downlink wide beam training signal and a first preset threshold coefficient as the first power threshold.

In an optional embodiment of the present application, the first determining module 1703 is specifically configured to: sequencing the p downlink narrow beam training signals according to the sequence of the power values from high to low; and determining the first q downlink narrow-beam training signals from the p downlink narrow-beam training signals.

In an alternative embodiment of the present application, the beam training signal comprises a pseudo random sequence signal or an SSB signal.

The beam training device provided by the embodiment of the application can realize the method embodiment, the realization principle and the technical effect are similar, and the details are not repeated herein.

For the specific definition of the beam training apparatus, reference may be made to the above definition of the beam training method, which is not described herein again. The modules in the beam training apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the relay device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

Referring to fig. 19, a block diagram of a beam training apparatus 1900 according to an embodiment of the present application is shown, where the beam training apparatus 1700 may be configured in a first communication device. As shown in fig. 19, the beam training apparatus 1900 may include: a sending module 1901.

The transmitting module 1901 is configured to transmit a plurality of beam training signal sets to the relay device, where each beam training signal set includes a beam training procedure indication signal and a plurality of beam training signals. The plurality of beam training signal sets are used for the relay device to determine a target beam training signal from the plurality of beam training signal sets based on signal power, and forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

In an optional embodiment of the present application, the target beam training signal includes a target downlink wide beam training signal, the first communication device is a base station, the second communication device is a UE, and the sending module 1901 is specifically configured to: sending a plurality of wide beam training signal sets to the relay device, wherein each wide beam training signal set comprises N downlink wide beam training signals and wide beam training process indicating signals sent by the base station in N base station sending sectors, and N is a positive integer greater than 1; wherein the plurality of wide beam training signal sets are used for the relay device to determine the target downlink wide beam training signal from the plurality of wide beam training sets based on signal power and to send the target downlink wide beam training signal to the UE.

Referring to fig. 20, another beam training apparatus 2000 provided in this embodiment of the present application is shown, where the beam training apparatus 2000 includes, in addition to the modules included in the beam training apparatus 1900, a first receiving module 1902, a first determining module 1903, a second receiving module 1904, a second determining module 1905, a third determining module 1906, a third receiving module 1907, and a fourth determining module 1908.

In an optional embodiment of the present application, the downlink wide beam training signal is a pseudo random sequence signal, and the first receiving module 1902 is configured to receive first wide beam indication information sent by the UE, where the first wide beam indication information is used to indicate a base station transmission sector corresponding to the target downlink wide beam training signal.

The first determining module 1903 is configured to use the base station transmission sector indicated by the first wide beam indication information as an optimal base station transmission sector for millimeter wave communication between the base station and the relay device.

In an optional embodiment of the present application, the downlink wide beam training signal is an SSB signal, and the second receiving module 1904 is configured to receive second wide beam indication information sent by the UE in a physical random access channel PRACH according to the target downlink wide beam training signal.

A second determining module 1905, configured to determine, according to the time-frequency position of the second wide beam indication information in the PRACH, a base station sending sector corresponding to the target downlink wide beam training signal.

The third determining module 1906 is configured to use the base station transmitting sector corresponding to the target downlink wide beam training signal as an optimal base station transmitting sector for millimeter wave communication between the base station and the relay device.

In an optional embodiment of the present application, the target beam training signal includes a target downlink narrow beam training signal, and the sending module 1901 is specifically configured to: sending a narrow beam training signal set to the relay device, where the narrow beam training signal set includes M downlink narrow beam training signals and a narrow beam training procedure indication signal, where M is a positive integer greater than 1, sent by M base station sending sub-sectors included in the optimal base station sending sector by the base station to the relay device; the narrow beam training signal set is used for the relay device to determine the target downlink narrow beam training signal from the narrow beam training signal set based on signal power, and send the target downlink narrow beam training signal to the UE.

In an optional embodiment of the present application, the third receiving module 1907 is configured to receive narrow beam indication information sent by the UE, where the narrow beam indication information is used to indicate a base station transmission sub-sector corresponding to the target downlink narrow beam training signal.

The fourth determining module 1908 is configured to use the base station transmission sub-sector indicated by the narrow beam indication information as an optimal base station transmission sub-sector for the base station to perform millimeter wave communication with the relay device.

In an optional embodiment of the application, the target beam training signal includes a target uplink wide beam training signal, the first communication device is a UE, the second communication device is a base station, and the sending module 1901 is specifically configured to: sending a plurality of wide beam training signal sets to the relay device, wherein the wide beam training signals comprise wide beam training procedure indication signals and L uplink wide beam training signals; the plurality of wide beam training signal sets are used for the relay device to determine the target uplink wide beam training signal from the plurality of wide beam training sets based on signal power and to send the target uplink wide beam training signal to the base station.

In an optional embodiment of the present application, the beam training procedure indication signal is located in an uplink and downlink timeslot guard interval, and the beam training procedure indication signal is a pseudo random sequence signal obtained by performing cyclic shift processing on an original fixed sequence signal.

For the specific definition of the beam training apparatus, reference may be made to the above definition of the beam training method, which is not described herein again. The modules in the beam training apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The modules may be embedded in hardware or independent of the processor in the first communication device, or may be stored in software in the memory in the computer device, so that the processor calls and executes operations corresponding to the modules.

Referring to fig. 21, a block diagram of a beam training apparatus 2100 according to an embodiment of the present application is shown, where the beam training apparatus 2100 may be configured in a second communication device. As shown in fig. 21, the beam training apparatus 2100 may include: a receiving module 2101 and a response module 2102.

A receiving module 2101 is configured to receive the target beam training signal sent by the relay device.

The response module 2102 is configured to respond to a beam training procedure initiated by the first communication device based on the target beam training signal.

The target beam training signal is determined by the relay device based on signal power in a received plurality of beam training signal sets sent by the first communication device, and the beam training signal set comprises a beam training procedure indication signal and a plurality of beam training signals.

In an optional embodiment of the present application, the first communication device is a base station, the second communication device is a UE, the target beam training signal includes a target downlink wide beam training signal, the target downlink wide beam training signal is a pseudo random sequence signal, and the response module 2102 is specifically configured to: generating first wide beam indication information according to the target downlink wide beam training signal, wherein the first wide beam indication information is used for indicating a base station sending sector corresponding to the target downlink wide beam training signal; and sending the first wide beam indication information to the base station, so that the base station takes the base station sending sector indicated by the first wide beam indication information as an optimal base station sending sector for the base station to perform millimeter wave communication with the relay device.

In an optional embodiment of the present application, the first communication device is a base station, the second communication device is a UE, the target beam training signal includes a target downlink wide beam training signal, the target downlink wide beam training signal is an SSB signal, and the response module 2102 is specifically configured to: generating second wide beam indicating information; determining a target time-frequency position in the PRACH according to the target downlink wide-beam training signal; and sending the second wide beam indication information at the target time-frequency position, so that the base station determines a base station sending sector corresponding to the target downlink wide beam training signal based on the target time-frequency position, and taking the base station sending sector corresponding to the target downlink wide beam training signal as an optimal base station sending sector for millimeter wave communication between the base station and the relay device.

In an alternative embodiment of the present application, the target beam training signal includes a target downlink narrow beam training signal, and the response module 2102 is specifically configured to: generating narrow beam indication information according to the target downlink narrow beam training signal, wherein the narrow beam indication information is used for indicating a base station transmission sub-sector corresponding to the target downlink narrow beam training signal; and sending the narrow beam indication information to the base station, so that the base station takes the base station sending sub-sector indicated by the narrow beam indication information as an optimal base station sending sub-sector for the base station to perform millimeter wave communication with the relay device.

In an optional embodiment of the present application, the first communication device is a UE, the second communication device is a base station, the target beam training signal includes a target uplink wide beam training signal, and the response module 2102 is specifically configured to: receiving the target uplink wide-beam training signal sent by the relay device at N base station receiving sectors of the base station, and determining power values of the target wide-beam training signal received at each base station receiving sector; and taking the base station receiving sector corresponding to the target uplink wide-beam training signal with the highest power value as the optimal base station receiving sector for the millimeter wave communication between the base station and the relay equipment, wherein N is an integer greater than 1.

In an alternative embodiment of the present application, the response module 2102 is specifically configured to: continuously receiving the target uplink wide beam training signal sent by the relay device in M base station receiving sub-sectors included in the optimal base station receiving sector; sequentially detecting whether the power value of the target uplink wide beam training signal received in the M base station receiving sub-sectors is larger than a second power threshold value; if it is detected that the power values of j target uplink wide beam training signals received in the M base station receiving sub-sectors are greater than the second power threshold, f target uplink wide beam training signals in the j target uplink wide beam training signals are obtained, wherein j is a positive integer, and f is a positive integer less than or equal to j; and taking the base station receiving sub-sector corresponding to the target uplink wide-beam training signal with the highest power value in the f target uplink wide-beam training signals as the optimal base station receiving sub-sector for the base station to perform millimeter wave communication with the relay equipment.

In an optional embodiment of the present application, the response module 2102 is further configured to use a product of a power value of the target uplink wide beam training signal corresponding to the optimal base station receiving sector and a second preset threshold coefficient as the second power threshold.

In an optional embodiment of the present application, the response module 2102 is specifically configured to rank j target uplink wide beam training signals in order of power values from high to low; and f, acquiring the upstream wide-beam training signals of the first sorted targets.

For the specific definition of the beam training apparatus, reference may be made to the above definition of the beam training method, which is not described herein again. The modules in the beam training apparatus may be implemented in whole or in part by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the second communication device, or can be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

Fig. 22 is a schematic diagram of an internal structure of a communication device in an embodiment, where the communication device may be a relay device, a base station, or a UE. As shown in fig. 22, the communication device includes a processor, a memory, a receiver, and a transmitter connected by a system bus. Wherein the processor is configured to provide computational and control capabilities to support the operation of the overall communication device. The memory may include non-volatile storage media and internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program may be executed by a processor to implement a method for beam training provided in the above embodiments. The internal memory provides a cached operating environment for the operating system and computer programs in the non-volatile storage medium. The communication device may communicate with other communication devices through a receiver and a transmitter.

Those skilled in the art will appreciate that the configuration shown in fig. 22 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation on the communication device to which the present application is applied, and that a particular communication device may include more or less components than those shown, or combine certain components, or have a different arrangement of components.

Fig. 23 is a schematic diagram of an internal structure of a relay device in an embodiment, where the relay device may include a correlator, a wide-beam calculator, and a narrow-beam calculator, where the correlator and the wide-beam calculator may cooperate to implement a function of the relay device for detecting whether the millimeter-wave communication signal set includes a wide-beam training procedure indication signal, and the correlator and the narrow-beam calculator may cooperate to implement a function of the relay device for detecting whether the millimeter-wave communication signal set includes a narrow-beam training procedure indication signal.

Fig. 24 is a block diagram of millimeter-wave communication system 2400 in an embodiment, and as shown in fig. 24, millimeter-wave communication system 2400 may include a base station 2401, a relay device 2402, and a UE2403.

The base station 2401 may be configured to perform the technical process performed by the base station in the foregoing method embodiment.

The relay device 2402 may be configured to perform the technical process performed by the relay device in the foregoing method embodiment.

The UE2403 may be configured to perform the technical processes performed by the UE in the above method embodiments.

It should be further noted that, referring to fig. 25, in an optional embodiment of the present application, the relay device 2402 may be connected to the UE2403 through a hardware interface, and the relay device 2402 may request, through the hardware interface, the UE2403 to perform part or all of the computation processing procedures in the beam training described above, where the computation processing procedures may include, for example, detecting whether the millimeter wave communication signal set includes a beam training procedure indication signal, determining an optimal relay receiving sector in which the relay device performs millimeter wave communication with the base station, determining an optimal relay receiving sector in which the relay device performs millimeter wave communication with the UE, and determining a target beam training signal, and so on.

In an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, implements the beam training method provided by the embodiment of the present application.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in M forms, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SyMchlimk) DRAM (SLDRAM), raMbus (RaMbus) direct RAM (RDRAM), direct RaMbus Dynamic RAM (DRDRAM), and RaMbus Dynamic RAM (RDRAM), among others.

The technical features of the above-mentioned embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above-mentioned embodiments are not described, but should be considered as the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A beam training method, for use in a relay device of a millimeter wave communication system, the millimeter wave communication system including a first communication device that initiates a beam training procedure, a second communication device that responds to the beam training procedure, and the relay device, the beam training method comprising:

receiving a millimeter wave communication signal set sent by the first communication device, and detecting whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal, wherein the beam training signal set includes a plurality of beam training signals; the beam training signals and the beam training process indicating signals are both pseudo-random sequences, and the beam training signals and the beam training process indicating signals in the same beam training signal set are independent of each other;

determining a target beam training signal from a plurality of the sets of beam training signals transmitted by the first communications device based on signal power;

forwarding the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

2. The beam training method according to claim 1, wherein the receiving a millimeter wave communication signal set sent by the first communication device, and detecting whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal comprises:

respectively receiving the millimeter wave communication signal set sent by the first communication device at K relay receiving sectors of the relay device, and determining whether the millimeter wave communication signal set is a wide beam training signal set according to whether the millimeter wave communication signal set comprises a wide beam training procedure indication signal, wherein the wide beam training signal set comprises a plurality of wide beam training signals, and K is a positive integer greater than 1.

3. The beam training method according to claim 2, wherein the wide beam training procedure indication signal is a pseudo random sequence signal obtained by performing a first cyclic shift process on an original fixed sequence signal, and the determining whether the millimeter wave communication signal set is a wide beam training signal set according to whether the millimeter wave communication signal set includes the wide beam training procedure indication signal includes:

intercepting candidate communication signals at a target time domain position in a time domain range corresponding to the millimeter wave communication signal set;

and acquiring a power time delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal, detecting whether the candidate communication signal is the wide beam training process indication signal or not based on the power time delay map, and determining whether the millimeter wave communication signal set is the wide beam training signal set or not according to a detection result.

4. The beam training method of claim 3, wherein the detecting whether the candidate communication signal is the wide beam training procedure indication signal based on the power delay profile comprises:

detecting whether a peak value exceeding a first preset threshold value exists in a first observation window of the power delay map, wherein the first observation window is determined according to the first cyclic shift processing;

and if a peak value exceeding the first preset threshold value exists in the first observation window of the power delay map, determining the candidate communication signal as the wide beam training process indicating signal.

5. The beam training method of claim 2, wherein the method further comprises:

and determining an optimal relay receiving sector for millimeter wave communication between the relay device and the first communication device based on the wide beam training signal sets respectively received at the K relay receiving sectors.

6. The beam training method according to claim 5, wherein the determining an optimal relay receiving sector for the relay device to perform millimeter wave communication with the first communication device based on the wide beam training signal sets received at the K relay receiving sectors, respectively, comprises:

determining a power value of a set of wide beam training signals received at each of the relay receive sectors;

and taking the relay receiving sector corresponding to the target wide-beam training signal set with the highest power value as the optimal relay receiving sector for millimeter wave communication between the relay device and the first communication device.

7. The beam training method according to claim 6, wherein the first communication device is a base station, the second communication device is a UE, the target wide beam training signal set comprises N downlink wide beam training signals transmitted by the base station in N base station transmission sectors, N is a positive integer greater than 1, the target beam training signal comprises a target downlink wide beam training signal, and the determining a target beam training signal from among the plurality of beam training signal sets transmitted by the first communication device based on signal power comprises:

taking the downlink wide beam training signal with the highest power value in the N downlink wide beam training signals included in the target wide beam training signal set as the target downlink wide beam training signal;

the target downlink wide beam signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink wide beam training signal, so that the base station determines, according to the response of the UE, an optimal base station transmission sector for the base station to perform millimeter wave communication with the relay device.

8. The beam training method according to claim 6, wherein the first communication device is a UE, the second communication device is a base station, the target wide beam training signal set includes L uplink wide beam training signals transmitted by the UE, L is a positive integer greater than 1, the target beam training signal includes a target uplink wide beam training signal, and the determining a target beam training signal from among the plurality of beam training signal sets transmitted by the first communication device based on signal power comprises:

taking the L uplink wide beam training signals included in the target wide beam training signal set as the target uplink wide beam training signals;

the target uplink wide beam training signal is used for the base station to determine an optimal base station receiving sector and an optimal base station receiving sub-sector for millimeter wave communication between the base station and the relay device according to the target uplink wide beam training signal.

9. The beam training method according to claim 7, wherein the receiving a millimeter wave communication signal set sent by the first communication device, and detecting whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal comprises:

receiving, at an optimal relay receiving sector where the relay device performs millimeter wave communication with the base station, the millimeter wave communication signal set sent by the base station, and determining whether the millimeter wave communication signal set is a narrow beam training signal set according to whether the millimeter wave communication signal set includes a narrow beam training procedure indication signal, where the narrow beam training signal set includes M downlink narrow beam training signals sent by the base station in M base station sending sub-sectors, the M base station sending sub-sectors are sub-sectors in an optimal base station sending sector where the base station performs millimeter wave communication with the relay device, and M is a positive integer greater than 1.

10. The beam training method according to claim 9, wherein the narrow beam training procedure indication signal is a pseudo random sequence signal obtained by performing a second cyclic shift process on an original fixed sequence signal, and the determining whether the millimeter wave communication signal set is a narrow beam training signal set according to whether the millimeter wave communication signal set includes the narrow beam training procedure indication signal includes:

and acquiring a power time delay map corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal, detecting whether the candidate communication signal is the narrow beam training process indication signal or not based on the power time delay map, and determining whether the millimeter wave communication signal set is the narrow beam training signal set or not according to a detection result.

11. The beam training method of claim 10, wherein the detecting whether the candidate communication signal is the narrow beam training procedure indication signal based on the power delay profile comprises:

detecting whether a peak value exceeding a second preset threshold value exists in a second observation window of the power delay map, wherein the second observation window is determined according to the second cyclic shift processing;

and if a peak value exceeding the second preset threshold value exists in the second observation window of the power delay map, determining that the candidate communication signal is the narrow beam training process indication signal.

12. The method according to claim 3 or 10, wherein the obtaining a power delay profile corresponding to the candidate communication signal according to the candidate communication signal and the original fixed sequence signal comprises:

performing Fourier transform processing on the candidate communication signals to obtain candidate communication signals after the Fourier transform processing;

performing correlation value calculation on the candidate communication signals subjected to the Fourier transform and the original fixed sequence signals to obtain target communication signals;

and performing inverse Fourier transform processing on the target communication signal to obtain the power time delay map.

13. The beam training method according to claim 3 or 10, wherein the intercepting the candidate communication signal at the target time domain position in the time domain range corresponding to the millimeter wave communication signal set comprises:

and intercepting the candidate communication signal with a target length from the end of the time domain range corresponding to the millimeter wave communication signal set, wherein the target length is the time domain length of the beam training process indication signal.

14. The beam training method of claim 9, wherein the target beam training signal comprises a target downlink narrow beam training signal, and wherein the determining a target beam training signal from the plurality of sets of beam training signals transmitted by the first communication device based on signal power comprises:

sequentially detecting whether the power value of each downlink narrow-beam training signal is greater than a first power threshold value or not for M downlink narrow-beam training signals in the narrow-beam training signal set received in an optimal relay receiving sector in which the relay device and the base station perform millimeter wave communication;

if the power value of the p downlink narrow beam training signals is detected to be larger than the first power threshold value, determining q downlink narrow beam training signals from the p downlink narrow beam training signals, and taking the q downlink narrow beam training signals as the target downlink narrow beam training signals, wherein p is a positive integer, and q is a positive integer smaller than or equal to p;

the target downlink narrow-beam training signal is used for the UE to respond to the beam training procedure initiated by the base station according to the target downlink narrow-beam training signal, so that the base station determines, according to the response of the UE, an optimal base station transmission sub-sector where the base station and the relay device perform millimeter wave communication.

15. The beam training method according to claim 14, wherein the determining q downlink narrowbeam training signals from the p downlink narrowbeam training signals comprises:

sequencing the p downlink narrow beam training signals according to the sequence of the power values from high to low;

and determining the first q downlink narrow beam training signals from the p downlink narrow beam training signals.

16. A beam training method, for use in a first communication device initiating a beam training procedure in a millimeter wave communication system, the millimeter wave communication system including a second communication device responding to the beam training procedure, a relay device, and the first communication device, the beam training method comprising:

transmitting a plurality of beam training signal sets to the relay device, each beam training signal set comprising a beam training procedure indication signal and a plurality of beam training signals: the beam training signals and the beam training process indicating signals are both pseudo-random sequences, and the beam training signals and the beam training process indicating signals in the same beam training signal set are independent of each other;

the plurality of beam training signal sets are used for the relay device to determine a target beam training signal from the plurality of beam training signal sets based on signal power, and forward the target beam training signal to the second communication device, where the target beam training signal is used for the second communication device to respond to a beam training procedure initiated by the first communication device.

17. The beam training method of claim 16, wherein the target beam training signal comprises a target downlink wide beam training signal, wherein the first communication device is a base station, wherein the second communication device is a UE, and wherein the transmitting the plurality of sets of beam training signals to the relay device comprises:

sending a plurality of wide beam training signal sets to the relay device, wherein each wide beam training signal set comprises N downlink wide beam training signals and wide beam training process indicating signals sent by the base station in N base station sending sectors, and N is a positive integer greater than 1;

wherein the plurality of wide beam training signal sets are used for the relay device to determine the target downlink wide beam training signal from the plurality of wide beam training sets based on signal power and to send the target downlink wide beam training signal to the UE.

18. The beam training method of claim 17, wherein the downlink wide beam training signal is a pseudo-random sequence signal, and the method further comprises:

receiving first wide beam indication information sent by the UE, wherein the first wide beam indication information is used for indicating a base station sending sector corresponding to the target downlink wide beam training signal;

and taking the base station transmitting sector indicated by the first wide beam indication information as an optimal base station transmitting sector for millimeter wave communication between the base station and the relay equipment.

19. The beam training method of claim 17, wherein the downlink wide beam training signal is an SSB signal, the method further comprising:

receiving second wide beam indication information sent by the UE in a Physical Random Access Channel (PRACH) according to the target downlink wide beam training signal;

determining a base station sending sector corresponding to the target downlink wide beam training signal according to the time-frequency position of the second wide beam indication information in the PRACH;

and taking the base station sending sector corresponding to the target downlink wide-beam training signal as an optimal base station sending sector for millimeter wave communication between the base station and the relay equipment.

20. The beam training method of claim 18 or 19, wherein the target beam training signal comprises a target downlink narrow beam training signal, and wherein the transmitting a plurality of sets of beam training signals to the relay device comprises:

sending a narrow beam training signal set to the relay device, where the narrow beam training signal set includes M downlink narrow beam training signals and narrow beam training procedure indication signals, which are sent by M base station sending sub-sectors included in the optimal base station sending sector by the base station to the relay device, and M is a positive integer greater than 1;

the narrow beam training signal set is used for the relay device to determine the target downlink narrow beam training signal from the narrow beam training signal set based on signal power, and send the target downlink narrow beam training signal to the UE.

21. The beam training method of claim 20, wherein the method further comprises:

receiving narrow beam indication information sent by the UE, wherein the narrow beam indication information is used for indicating a base station sending sub-sector corresponding to the target downlink narrow beam training signal;

and taking the base station sending sub-sector indicated by the narrow beam indication information as an optimal base station sending sub-sector for the base station to carry out millimeter wave communication with the relay equipment.

22. The beam training method of claim 16, wherein the target beam training signal comprises a target uplink wide beam training signal, wherein the first communication device is a UE, wherein the second communication device is a base station, and wherein the transmitting the plurality of sets of beam training signals to the relay device comprises:

sending a plurality of wide beam training signal sets to the relay device, wherein the wide beam training signals comprise wide beam training procedure indication signals and L uplink wide beam training signals;

the plurality of wide beam training signal sets are used for the relay device to determine the target uplink wide beam training signal from the plurality of wide beam training sets based on signal power and to send the target uplink wide beam training signal to the base station.

23. A beam training method, for use in a second communication device responding to a beam training procedure in a millimeter wave communication system, the millimeter wave communication system including a first communication device initiating the beam training procedure, a relay device, and the second communication device, the beam training method comprising:

receiving a target beam training signal sent by the relay device, and responding to a beam training process initiated by the first communication device based on the target beam training signal;

the target beam training signal is determined by the relay device based on signal power in a received plurality of beam training signal sets sent by the first communication device, and the beam training signal sets comprise a beam training procedure indication signal and a plurality of beam training signals; the beam training signals and the beam training process indicating signals are both pseudo-random sequences, and the beam training signals and the beam training process indicating signals in the same beam training signal set are independent of each other.

24. The beam training method according to claim 23, wherein the first communication device is a base station, the second communication device is a UE, the target beam training signal comprises a target downlink wide beam training signal, the target downlink wide beam training signal is a pseudo-random sequence signal, and the responding to the beam training procedure initiated by the first communication device based on the target beam training signal comprises:

generating first wide beam indication information according to the target downlink wide beam training signal, wherein the first wide beam indication information is used for indicating a base station sending sector corresponding to the target downlink wide beam training signal;

and sending the first wide beam indication information to the base station, so that the base station takes the base station sending sector indicated by the first wide beam indication information as an optimal base station sending sector for millimeter wave communication between the base station and the relay device.

25. The beam training method according to claim 23, wherein the first communication device is a base station, the second communication device is a UE, the target beam training signal comprises a target downlink wide beam training signal, the target downlink wide beam training signal is an SSB signal, and the responding to the beam training procedure initiated by the first communication device based on the target beam training signal comprises:

generating second wide beam indicating information;

determining a target time-frequency position in the PRACH according to the target downlink wide-beam training signal;

and sending the second wide beam indication information at the target time-frequency position, so that the base station determines a base station sending sector corresponding to the target downlink wide beam training signal based on the target time-frequency position, and taking the base station sending sector corresponding to the target downlink wide beam training signal as an optimal base station sending sector for millimeter wave communication between the base station and the relay device.

26. The beam training method according to claim 24 or 25, wherein the target beam training signal comprises a target downlink narrow beam training signal, and wherein the responding to the beam training procedure initiated by the first communication device based on the target beam training signal comprises:

generating narrow beam indication information according to the target downlink narrow beam training signal, wherein the narrow beam indication information is used for indicating a base station transmission sub-sector corresponding to the target downlink narrow beam training signal;

and sending the narrow beam indication information to the base station, so that the base station can use the base station sending sub-sector indicated by the narrow beam indication information as an optimal base station sending sub-sector for the base station to perform millimeter wave communication with the relay device.

27. The beam training method of claim 23, wherein the first communication device is a UE, the second communication device is a base station, the target beam training signal comprises a target uplink wide beam training signal, and the responding to the beam training procedure initiated by the first communication device based on the target beam training signal comprises:

receiving the target uplink wide beam training signals sent by the relay device at N base station receiving sectors of the base station respectively, and determining power values of the target uplink wide beam training signals received at the base station receiving sectors;

and taking a base station receiving sector corresponding to the target uplink wide-beam training signal with the highest power value as an optimal base station receiving sector for millimeter wave communication between the base station and the relay equipment, wherein N is an integer greater than 1.

28. The beam training method of claim 27, wherein the responding to the beam training procedure initiated by the first communication device based on the target beam training signal comprises:

continuously receiving the target uplink wide beam training signals sent by the relay equipment in M base station receiving sub-sectors included in the optimal base station receiving sector;

sequentially detecting whether the power value of the target uplink wide beam training signal received in the M base station receiving sub-sectors is greater than a second power threshold value;

if it is detected that the power value of j target uplink wide beam training signals received in the M base station receiving sub-sectors is greater than the second power threshold, acquiring f target uplink wide beam training signals in the j target uplink wide beam training signals, wherein j is a positive integer, and f is a positive integer less than or equal to j;

and taking a base station receiving sub-sector corresponding to the target uplink wide-beam training signal with the highest power value in the f target uplink wide-beam training signals as an optimal base station receiving sub-sector for the base station to perform millimeter wave communication with the relay device.

29. The beam training method according to claim 28, wherein the obtaining f target uplink wide beam training signals from the j target uplink wide beam training signals comprises:

sequencing the j target uplink wide-beam training signals according to the sequence of the power values from high to low;

and acquiring f target uplink wide beam training signals in the front of the sequence.

30. A beam training apparatus, for use in a relay device of a millimeter wave communication system, the millimeter wave communication system including a first communication device that initiates a beam training procedure, a second communication device that responds to the beam training procedure, and the relay device, the beam training apparatus comprising:

the receiving module is used for receiving the millimeter wave communication signal set sent by the first communication device;

a detection module, configured to detect whether the millimeter wave communication signal set is a beam training signal set according to whether the millimeter wave communication signal set includes a beam training procedure indication signal, where the beam training signal set includes a plurality of beam training signals; the beam training signals and the beam training process indicating signals are both pseudo-random sequences, and the beam training signals and the beam training process indicating signals in the same beam training signal set are independent of each other;

a first determining module for determining a target beam training signal from a plurality of the sets of beam training signals transmitted by the first communication device based on signal power;

31. A beam training apparatus, for use in a first communication device initiating a beam training procedure in a millimeter wave communication system, the millimeter wave communication system including a second communication device responding to the beam training procedure, a relay device, and the first communication device, the beam training apparatus comprising:

a sending module, configured to send a plurality of beam training signal sets to the relay device, where each of the beam training signal sets includes a beam training procedure indication signal and a plurality of beam training signals: the beam training signals and the beam training process indicating signals are both pseudo-random sequences, and the beam training signals and the beam training process indicating signals in the same beam training signal set are independent of each other;

32. A beam training apparatus, used in a second communication device responding to a beam training procedure in a millimeter wave communication system, where the millimeter wave communication system includes a first communication device initiating the beam training procedure, a relay device, and the second communication device, the beam training apparatus comprising:

a receiving module, configured to receive a target beam training signal sent by the relay device;

a response module, configured to respond to a beam training procedure initiated by the first communication device based on the target beam training signal;

33. A communication device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, implements the beam training method of any of claims 1 to 29.

34. A millimeter wave communication system is characterized by comprising a first communication device initiating a beam training procedure, a second communication device responding to the beam training procedure and a relay device;

wherein the first communication device is configured to perform the beam training method performed by the first communication device according to any one of claims 16 to 22;

the second communications device, configured to perform the beam training method performed by the second communications device according to any one of claims 23 to 29;

the relay device, configured to perform the beam training method performed by the relay device according to any one of claims 1 to 15.

35. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the beam training method according to any one of claims 1 to 29.