CN114430557B

CN114430557B - Beam management method and device

Info

Publication number: CN114430557B
Application number: CN202210013421.2A
Authority: CN
Inventors: 廖敏; 高帅; 王璐璐; 张忠皓; 李福昌
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2023-04-28
Anticipated expiration: 2042-01-06
Also published as: CN114430557A

Abstract

The invention provides a beam management method and device, relates to the technical field of communication, and is used for reducing beam interference in cross time slots between terminals and improving communication efficiency. The beam management method comprises the following steps: sending first indication information to a terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the time indicated by the time domain position information of the terminal and measuring Reference Signal Received Power (RSRP) in a plurality of beam directions; receiving a plurality of RSRPs which are sent by a terminal and are in one-to-one correspondence with a plurality of beam directions; determining the beam direction of a downlink signal of a terminal according to a plurality of RSRPs; and sending second indication information for indicating the terminal to receive the downlink signal according to the beam direction to the terminal.

Description

Beam management method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a beam management method and apparatus.

Background

In order to improve the reduction of the path loss of an electronic wave in an ultra-high frequency band and increase the propagation distance of the electronic wave in the ultra-high frequency band, a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) communication system has gradually implemented a beam forming technology in a terminal as well as a base station.

There are three different frame structures for beamforming techniques, DDDSU (Option 1), respectively: the following behavior is a main frame structure, and is suitable for scenes with high downlink traffic flow and lower uplink traffic flow requirements; DSUUU (Option 2): the frame structure of the upper behavior master is suitable for scenes with the main video feedback and uploading service; DDSUU (Option 3): the frame structure with balanced uplink and downlink throughput rate is suitable for the scene with certain requirements on uplink and downlink service flow.

In order to meet the differentiation requirements of different terminals and increase the flexibility of millimeter waves in deployment, a flexible frame structure adjustment is proposed in the current scheme, namely, the proportion of the three different frame structures is adjusted according to long-time service conditions or emergency conditions. There may be cases of cross-slot intra-interference between terminals applying different frame structures.

For example, when the edge users of the two base stations adopt different frame structures and the directions of the positions of the edge users of the two base stations are close, the beam direction of the uplink signal of the left edge user and the beam direction of the downlink signal of the right edge user may be aligned, and stronger interference is easily generated.

Disclosure of Invention

The invention provides a beam management method and device, which are used for reducing beam interference in cross time slots between terminals and improving communication efficiency.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, a beam management method is provided, including:

sending first indication information to a terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the time indicated by the time domain position information of the terminal and measuring Reference Signal Received Power (RSRP) in a plurality of beam directions;

receiving a plurality of RSRPs which are sent by a terminal and are in one-to-one correspondence with a plurality of beam directions;

determining the beam direction of a downlink signal of a terminal according to a plurality of RSRPs;

and sending second indication information for indicating the terminal to receive the downlink signal according to the beam direction to the terminal.

Optionally, the first indication information further includes: RSRP threshold; the RSRP threshold is used for determining whether the terminal has beam interference in the cross time slot;

the RSRP comprises reference signal received power L1-RSRP of the layer one and reference signal received power SRS-RSRP of the sounding reference signal; the time domain location information includes time domain location information of the measured SRS-RSRP.

Optionally, the plurality of RSRP includes a plurality of L1-RSRP and a plurality of SRS-RSRP;

according to a plurality of RSRP, determining the beam direction of the downlink signal of the terminal comprises:

when the maximum SRS-RSRP in the plurality of SRS-RSRP is larger than the RSRP threshold, determining the beam direction corresponding to the maximum L1-RSRP in the to-be-selected set as the beam direction of the downlink signal of the terminal; the set to be selected includes: at least one L1-RSRP in one-to-one correspondence with at least one SRS-RSRP less than an RSRP threshold of the plurality of SRS-RSRPs.

Optionally, the beam management method further includes:

acquiring a first frame structure of a beam configured for a terminal and a second frame structure of a beam configured for an interference terminal;

and determining time domain position information of the moment when the terminal and the interference terminal generate cross time slot interference according to the first frame structure and the second frame structure.

In a second aspect, there is provided a beam management apparatus comprising: a transmitting unit, a receiving unit and a processing unit;

a sending unit, configured to send first indication information to a terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the time indicated by the time domain position information of the terminal and measuring Reference Signal Received Power (RSRP) in a plurality of beam directions;

a receiving unit, configured to receive a plurality of RSRPs that are sent by a terminal and that are in one-to-one correspondence with a plurality of beam directions;

the processing unit is used for determining the beam direction of the downlink signal of the terminal according to the plurality of RSRPs;

and the sending unit is also used for sending second indication information for indicating the terminal to receive the downlink signals according to the beam direction to the terminal.

the processing unit is specifically used for:

Optionally, the beam management device further includes: an acquisition unit;

an acquisition unit configured to acquire a first frame structure of a beam configured for a terminal and a second frame structure of a beam configured for an interfering terminal;

and the processing unit is used for determining time domain position information of the moment when the terminal and the interference terminal generate cross time slot interference according to the first frame structure and the second frame structure.

In a third aspect, a beam management apparatus is provided, comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the beam management apparatus is operated, the processor executes computer-executable instructions stored in the memory to cause the beam management apparatus to perform the beam management method according to the first aspect.

The beam management device may be a network device or may be a part of a device in a network device, such as a system-on-chip in a network device. The system-on-chip is configured to support the network device to implement the functions involved in the first aspect and any one of its possible implementations, e.g. to receive, determine, and shunt data and/or information involved in the beam management method described above. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourth aspect, there is provided a computer readable storage medium comprising computer executable instructions which, when run on a computer, cause the computer to perform the beam management method of the first aspect.

In a fifth aspect, there is also provided a computer program product comprising computer instructions which, when run on a beam management apparatus, cause the beam management apparatus to perform the beam management method as described in the first aspect above.

It should be noted that the above-mentioned computer instructions may be stored in whole or in part on the first computer readable storage medium. The first computer readable storage medium may be packaged together with the processor of the beam management device, or may be packaged separately from the processor of the beam management device, which is not limited in this application.

The descriptions of the second, third, fourth, and fifth aspects of the present application may be referred to the detailed description of the first aspect; further, the advantages of the second aspect, the third aspect, the fourth aspect and the fifth aspect may be referred to as the analysis of the advantages of the first aspect, and will not be described here again.

In this application, the names of the above beam management apparatuses do not constitute limitations on the devices or functional modules themselves, and in actual implementations, these devices or functional modules may appear under other names. Insofar as the function of each device or function module is similar to the present application, it is within the scope of the claims of the present application and the equivalents thereof.

These and other aspects of the present application will be more readily apparent from the following description.

The technical scheme provided by the application at least brings the following beneficial effects:

the application provides a beam management method, which measures RSRP in a plurality of beam directions by indicating the time indicated by the time domain position information of a terminal, so that the beam direction of a downlink signal of the terminal is determined, the downlink signal of the terminal can be transmitted at the maximum speed, the influence of a detection reference signal of an adjacent terminal on the downlink signal of the terminal is reduced, the interference condition between terminals applying different frame structures is improved, and the network performance of downlink beam forming is improved.

Drawings

Fig. 1A is a schematic structural diagram of a beam pair provided in the present application;

fig. 1B is a schematic structural diagram of a communication system provided in the present application;

fig. 2A is a schematic hardware structure of a communication device provided in the present application;

fig. 2B is a schematic diagram of another hardware structure of the communication device provided in the present application;

fig. 3 is a flow chart of a beam management method provided in the present application;

fig. 4 is an exemplary diagram of a beam management method provided herein;

fig. 5 is a diagram illustrating another example of a beam management method provided herein;

fig. 6 is a diagram of still another example of a beam management method provided herein;

fig. 7 is a schematic structural diagram of a beam management apparatus provided in the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", and the like are not limited in number and execution order.

For ease of understanding the present application, relevant elements referred to in the present application will now be described.

Beamforming in millimeter wave band

Due to antenna size and propagation condition limitations, high-band application of massive beamforming techniques to compensate for path propagation loss. And analog or hybrid (analog + digital) beamforming is the main technical means in view of cost and power consumption. For this purpose, a beam management mechanism is designed for the 5G base station, so that the base station and the terminal can align to transmit and receive beams, including a beam measurement and reporting mechanism, a beam indication mechanism, and the like.

After the base station selects one of the transmission beams, the signal propagates along a specific direction, and the terminal needs to receive by using a reception beam corresponding to the transmission beam of the base station, otherwise, the quality of the received signal of the terminal is degraded or even the useful signal cannot be received. Therefore, there is a certain correspondence between the transmit beam and the receive beam, which we call a beam pair. As shown in fig. 1A, the beam t6 of the base station and the r2 beam of the user 2 are one beam pair. The beam t4 of the base station and the r3 beam of the user 1 are one beam pair.

To achieve alignment of the transmit and receive beam pairs, the base station transmits Reference signals (e.g., channel state measurement pilot (Channel State Information-Reference Signal, CSI-RS)) in a beam scanning manner. If a base station is capable of transmitting M analog beams, one reference signal may be configured for each beam for measurement of the beam, each reference signal being shaped with a corresponding analog beam. The M reference signals are transmitted on different time or frequency domain resources so that the base station can adjust the configuration of the phase shifters for each beam direction to achieve analog beamforming.

Beam management for millimeter waves

In millimeter wave communication, beam scanning and beam tracking are key technologies and bases of millimeter waves, and downlink beam tracking mainly depends on beam scanning (initial access state) of synchronous broadcast control channels (system synchronization block, SSB) and beam scanning (service connection state) of CSI-RS reference signals. Beam management specifically includes aspects such as beam scanning, beam measurement, beam identification, beam reporting, and beam fault recovery.

Beam scanning

Beam scanning refers to the transmission and/or reception of beams in a preset manner to cover a specific spatial area during a specific period or time. In order to expand the beamforming gain, a high gain directional antenna is generally used to form a narrow beam width, and the narrow beam width is prone to the problem of insufficient coverage. To avoid this problem, multiple narrow beams may be used in the time domain to scan over the coverage area to meet the coverage requirements in the area. With the beam scanning technique, the beam is transmitted in a predefined direction with a fixed period.

Beam measurement

Beam measurement refers to the process by which a base station or terminal measures the quality and characteristics of a received shaped signal. In the beam management process, the terminal or the base station identifies the best beam through the correlation measurement. In the downlink direction, 3GPP defines a beam measurement reporting procedure based on layer-one reference signal received power (L1-Reference Signal Receiving Power, L1-RSRP) to support beam selection and reselection, which may be based on SSB or CSI-RS allocated to a terminal. Fast beam information measurement and reporting can be performed by L1-RSRP, and measurement is performed based on L1 without L3 filtering process. While the conventional L3 RSRP is reported by a higher layer, the L1 RSRP in 5G reports directly at the physical layer, so that both reliability and channel capacity are important.

Beam determination

The base station or terminal selects the Tx/Rx beam it uses. The downlink beam is determined by the terminal and the decision criterion is that the maximum received signal strength of the beam should be greater than a certain threshold. In the uplink direction, the mobile terminal transmits sounding reference signals (Sounding Reference Signal, SRS) according to the direction of the base station, which measures the SRS to determine the best uplink beam. If the base station side can determine the uplink reception beam according to the downlink beam measurement result of the terminal, or the base station side can determine the downlink transmission beam according to the measurement result of the uplink reception beam, the base station side can consider that Tx/Rx beams are consistent. Also, if the terminal side can determine an uplink transmission beam according to a downlink beam measurement result of the terminal, or the terminal can determine a downlink reception beam of the terminal according to an uplink beam measurement result of the terminal, and the base station supports the characteristic indication information related to the beam consistency of the terminal, the terminal side can consider that Tx/Rx beams are consistent.

Beam reporting

After determining the best beam, the terminal or the base station notifies the opposite terminal of the selected beam information. In addition, the base station and the terminal side need to perform related operations such as beam failure recovery. With multi-beam operation, beam faults can easily cause a link break between the network and the terminal due to the relatively narrow beam width. When the channel quality of the terminal is poor, the bottom layer will send a beam failure notification. The terminal will indicate a new SS block or CSI-RS and perform beam recovery through a new RACH procedure. The base station will transmit downlink configuration or UL grant information on the PDCCH to end the beam recovery procedure.

Flexible frame structure of millimeter wave frequency band

In order to meet the differentiated industry demands, particularly the video backhaul services such as monitoring, picking and broadcasting, medical treatment and the like which have clear demands on the uplink, the technical advantages of millimeter waves in the aspect of uplink are improved, the flexibility of the millimeter waves in deployment is improved, and the embodiment of the application can utilize an uplink-enhanced proportioning scheme outside the millimeter wave conventional frame structure (in the downlink direction).

Millimeter wave common frame structure

DDDSU (Option 1): the following action is a main frame structure, is suitable for scenes with high downlink traffic flow and lower uplink traffic flow requirements, has large downlink occupation ratio, can be covered by more beams, and has correspondingly better downlink coverage.

DSUUU (Option 2): the frame structure of the uplink master is suitable for scenes with the main video backhaul and uploading services, and has more resources required for the uplink processing of the base station and higher realization difficulty. The downlink duty cycle is small, the SSB can place the beam limited, and the coverage will be relatively small.

DDSUU (Option 3): the frame structure with balanced uplink and downlink throughput rate is suitable for the scene with certain requirements on uplink and downlink service flow.

For the 3 millimeter wave common frame structures, prediction adjustment can be performed according to long-time service conditions of a coverage area, and rapid adjustment of uplink and downlink frame structures can be performed according to sudden conditions applied in 5G industry. The millimeter wave common frame structure can effectively face the sudden requirement of a concert, a stadium and the like on the uplink bandwidth.

Inter-terminal interference across time slots

As shown in fig. 1B, there is beam interference (UtoD: uplink transmission of a neighboring UE interferes with downlink reception of a neighboring UE) in a cross slot between terminals (User Equipment) applying different frame structures. A typical scenario is that when two base station edge users are located in close proximity, stronger UtoD interference is generated when the transmit/receive beams of the two users are aligned.

As can be seen from the above, the edge users of the two base stations adopt different frame structures, and when the directions of the positions of the edge users of the two base stations are close, the beam direction of the uplink signal of the left edge user and the beam direction of the downlink signal of the right edge user may be aligned, so that stronger interference is easily generated.

In view of the above problems, the embodiments of the present application provide a beam management method, which measures RSRP in multiple beam directions by indicating a time indicated by time domain location information of a terminal, so as to determine a beam direction of a downlink signal of the terminal, so that the downlink signal of the terminal can be transmitted at a maximum rate, reduce the influence of a sounding reference signal of an adjacent terminal on the downlink signal of the terminal, improve the interference situation between terminals applying different frame structures, and improve the network performance of downlink beam forming.

The beam management method is applicable to a communication system. Fig. 1B shows a structure of the communication system. As shown in fig. 1B, the communication system includes: an interfering terminal, an interfered terminal, an interfering base station, and an interfered base station.

The interfering and interfered terminals in fig. 1B may be devices that provide voice and/or data connectivity to the user, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The wireless terminal may communicate with one or more core networks via a radio access network (radio access network, RAN). The wireless terminals may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers with mobile terminals, as well as portable, pocket, hand-held, computer-built-in or car-mounted mobile devices which exchange voice and/or data with radio access networks, e.g. cell phones, tablet computers, notebook computers, netbooks, personal digital assistants (personal digital assistant, PDA).

The interfering base station and the interfered base station in fig. 1B may be base stations or base station controllers for wireless communication, or the like. In the embodiment of the present application, the base station may be a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communication, GSM), a base station (base transceiver station, BTS) in a code division multiple access (code division multiple access, CDMA), a base station (node B) in a wideband code division multiple access (wideband code division multiple access, WCDMA), a base station (eNB) in an internet of things (internet of things, ioT) or a narrowband internet of things (NB-IoT), a base station in a future 5G mobile communication network or a future evolved public land mobile network (public land mobile network, PLMN), which is not limited in any way by the embodiment of the present application.

The basic hardware architecture of an interfering terminal, an interfered terminal, an interfering base station, and an interfered base station in a communication system is similar and includes elements included in the communication apparatus shown in fig. 2A or fig. 2B. The hardware configuration of the terminal, the interfering base station, and the interfered base station will be described below using the communication apparatus shown in fig. 2A and 2B as an example.

Fig. 2A is a schematic hardware structure of a communication device according to an embodiment of the present application. The communication device comprises a processor 21, a memory 22, a communication interface 23, a bus 24. The processor 21, the memory 22 and the communication interface 23 may be connected by a bus 24.

The processor 21 is a control center of the communication device, and may be one processor or a collective term of a plurality of processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processing unit, CPU), or may be another general-purpose processor. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.

As one example, processor 21 may include one or more CPUs, such as CPU 0 and CPU 1 shown in fig. 2A.

Memory 22 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In a possible implementation, the memory 22 may exist separately from the processor 21, and the memory 22 may be connected to the processor 21 by a bus 24 for storing instructions or program code. The beam management method provided in the following embodiments of the present invention can be implemented when the processor 21 invokes and executes instructions or program codes stored in the memory 22.

In the embodiment of the present application, the software programs stored in the memory 22 are different for the terminal, the interfering base station and the interfered base station, so that the functions implemented by the terminal, the interfering base station and the interfered base station are different. The functions performed with respect to the respective devices will be described in connection with the following flowcharts.

In another possible implementation, the memory 22 may also be integrated with the processor 21.

A communication interface 23 for connecting the communication device with other devices via a communication network, which may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN) or the like. The communication interface 23 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.

Bus 24 may be an industry standard architecture (industry standard architecture, ISA) bus, an external device interconnect (peripheral component interconnect, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 2A, but not only one bus or one type of bus.

It should be noted that the structure shown in fig. 2A does not constitute a limitation of the communication device, and the communication device may include more or less components than those shown in fig. 2A, or may combine some components, or may be arranged in different components.

Fig. 2B shows another hardware configuration of the communication apparatus in the embodiment of the present invention. As shown in fig. 2B, the communication device may include a processor 31 and a communication interface 32. The processor 31 is coupled to a communication interface 32.

The function of the processor 31 may be as described above with reference to the processor 21. The processor 31 also has a memory function and can function as the memory 22.

The communication interface 32 is used to provide data to the processor 31. The communication interface 32 may be an internal interface of the communication device or an external interface of the communication device (corresponding to the communication interface 23).

It should be noted that the structure shown in fig. 2A (or fig. 2B) does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 2A (or fig. 2B), or may combine some components, or may be arranged in different components.

As shown in fig. 3, a flow chart of a beam management method provided in an embodiment of the present application includes:

s301, the base station sends first indication information to the terminal.

When the cell covered by the adjacent base station applies the frame structure of the uplink enhancement proportion (such as prediction adjustment according to the long-time service condition of the coverage area), the terminal downlink receives the interference generated by the terminal uplink transmission signal of the cell covered by the adjacent base station during the cross time slot. In this case, the base station may transmit the first indication information to the terminal.

The first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the terminal to measure RSRP in a plurality of beam directions at the time indicated by the time domain position information.

Optionally, the first indication information further includes: RSRP threshold.

Wherein the RSRP threshold is used to determine whether the terminal has beam interference in the cross slot.

In practical applications, the RSRP threshold may be set by human experience.

Optionally, the RSRP includes a layer one reference signal received power (L1-RSRP) and a sounding reference signal received power (Sounding Reference Signal-RSRP, SRS-RSRP); the time domain location information includes time domain location information of the measured SRS-RSRP.

Alternatively, the base station may acquire a first frame structure of a beam configured for the terminal and a second frame structure of a beam configured for the interfering terminal when determining the time domain location information. And then, the base station determines time domain position information of the moment when the terminal and the interference terminal generate cross time slot interference according to the first frame structure and the second frame structure, so that the base station can be ensured to accurately acquire the RSRP of the moment when the terminal and the interference terminal generate cross time slot interference.

For example, when the base station sends the first indication information to the terminal, a measurement indication message (srs-resource control) for cross-slot interference detection and a Threshold value (Threshold-RSRP) for triggering L1-RSRP reporting may be configured to the terminal through radio resource control (Radio Resource Control, RRC) signaling.

Wherein the time domain positions of the measurement indication messages are in crossing time slots of different frame structures.

Alternatively, the base station may be an interfering base station or an interfered base station in the communication system shown in fig. 1B.

Correspondingly, when the base station is an interfering base station in the communication system shown in fig. 1B, the terminal is an interfering terminal in a cell covered by the interfering base station.

Accordingly, when the base station is an interfered base station in the communication system shown in fig. 1B, the terminal is an interfered terminal in a cell covered by the interfering base station.

S302, the base station receives a plurality of RSRPs which are sent by the terminal and correspond to the beam directions one by one.

Specifically, after receiving the first indication information, the terminal may measure RSRP in a plurality of beam directions and transmit a plurality of RSRP corresponding to the plurality of beam directions one to the base station.

For example, as shown in fig. 4, after receiving the first indication information, the terminal may scan a Reference Signal (RS) of "downlink receive beam adjustment" with different receive beams to adjust the current downlink receive beam.

If the base station has configured a measurement indication message for cross slot interference detection for the terminal, the terminal measures the SRS in the selected reception beam and records and transmits SRS RSRP to the base station. Subsequently, the base station can evaluate the interference degree received by the downlink receiving beam at the terminal side.

Optionally, since the first indication information further includes an RSRP threshold, the terminal may determine whether the terminal has beam interference in the cross slot according to the RSRP threshold.

For example, if the SRS RSRP measured on the downlink reception beam selected by the terminal exceeds the configured Threshold-RSR, it indicates that strong interference is received in the beam direction, and the L1-RSRP should be reported in a Report message (CSI Report) of the extended channel measurement information.

Wherein the extended format comprises three sets of measurement results of received beams, each set of format being as follows:

1. reporting at most 4 reference signals (beams);

2. the L1-RSRP of the strongest beam;

3. L1-RSRP difference of remaining beams (3) and strongest beam;

4. SRS-RSRP for downlink receive beam measurements.

And the rest two groups of the measurement results of the received beams are recommended to the base station by the terminal in the SRS RSRP which is recorded by the measured downlink received beam scanning and is lower than the configured Threshold-RSR.

It should be noted that, the mapping relationship of the reported value of SRS-RSRP may refer to the related description in the prior art, and will not be described herein.

Still another example, as shown in fig. 5, for a DSUUU frame proportioning base station and a DDDSU frame proportioning base station, the terminal and the interfering terminal do not interfere at time T1, but interfere at time T2.

At time T1, when the terminal measures the configured SSB/channel state information-Reference Signal (CSI-RS), the terminal is not interfered by the interfering terminal. In this case, the terminal can only select the beam direction in which the base station signal is stronger, no matter whether it reports based on RSRP or signal-to-interference plus noise ratio (Signal to Interference plus Noise Ratio).

And at time T2, the terminal may measure SRS of the configured interfering terminal. If the SRS-RSRP measured on the previously selected receive beam exceeds the configuration threshold, then two new receive beam directions are selected for which the SRS-RSRP is below the configuration threshold.

At the measurement time of the next SSB/CSI-RS, either periodic or aperiodic, the terminal can also make L1-RSRP measurements for the newly selected two receive beam directions. And reports the L1-RSRP in a Report message (CSI Report) of the extended channel measurement information.

S303, the base station determines the beam direction of the downlink signal of the terminal according to the plurality of RSRPs.

After receiving a plurality of RSRP signals corresponding to the plurality of beam directions one by one, the base station may determine, according to the plurality of RSRP signals, whether the terminal receives interference from the interfering terminal in each beam direction, and select a beam direction that is not interfered to determine as a beam direction of a downlink signal of the terminal.

Optionally, the plurality of RSRPs includes a plurality of L1-RSRPs and a plurality of SRS-RSRPs.

The method for determining the beam direction of the downlink signal of the terminal by the base station according to the plurality of RSRP specifically comprises the following steps:

And when the maximum SRS-RSRP in the plurality of SRS-RSRPs is smaller than or equal to the RSRP threshold, determining the beam direction corresponding to the maximum L1-RSRP in the plurality of L1-RSRPs as the beam direction of the downlink signal of the terminal.

For example, as shown in fig. 6, after receiving CSI Report (L1-RSRP additional SRS-RSRP) reported by the terminal, the base station analyzes the SRS-RSRP in the reported measurement result of the first group, and determines that the terminal sent by the downlink beam detects that the terminal receives the interference of the interfering terminal.

Then, the base station selects one beam direction with better L1-RSRP from the strongest beams corresponding to the two groups of downlink receiving beams recommended by the terminal, and determines the beam direction as the beam direction of the downlink signal of the terminal.

S304, the base station sends second indication information for indicating the terminal to receive the downlink signal according to the beam direction to the terminal.

For example, the base station selects a beam direction with better L1-RSRP from the strongest beams corresponding to the two sets of downlink reception beams recommended by the terminal, and issues a medium access control (Media Access Control, MAC) signaling to instruct the terminal control interface (Terminal Control Interface, TCI) of the beam direction corresponding to the terminal, that is, selects the downlink beam direction not interfered by the interfering terminal to perform data transmission.

It can be seen that, in the embodiment of the present application, the base station measures RSRP in multiple beam directions by indicating the time indicated by the time domain location information of the terminal, so as to determine the beam direction of the downlink signal of the terminal, so that the downlink signal of the terminal is transmitted at the maximum rate, the influence of the sounding reference signal of the neighboring terminal on the downlink signal of the terminal is reduced, the interference situation between terminals applying different frame structures is improved, and the network performance of the downlink beam forming is improved.

The foregoing description of the solution provided in the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application may divide the functional modules of the terminal according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiments of the present application is schematic, which is merely a logic function division, and other division manners may be actually implemented.

Fig. 7 is a schematic structural diagram of a beam management apparatus according to an embodiment of the present application. The beam management apparatus may be used to perform the beam management method shown in fig. 3. The beam management apparatus shown in fig. 7 includes: a transmitting unit 701, a receiving unit 702, and a processing unit 703;

a transmitting unit 701, configured to transmit first indication information to a terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the time indicated by the time domain position information of the terminal and measuring Reference Signal Received Power (RSRP) in a plurality of beam directions;

a receiving unit 702, configured to receive a plurality of RSRPs that are sent by a terminal and that are in one-to-one correspondence with a plurality of beam directions;

a processing unit 703, configured to determine a beam direction of a downlink signal of the terminal according to the plurality of RSRP;

the transmitting unit 701 is further configured to transmit, to the terminal, second indication information for instructing the terminal to receive the downlink signal according to the beam direction.

the processing unit 703 is specifically configured to:

Optionally, the beam management device further includes: an acquisition unit 704;

an acquiring unit 704, configured to acquire a first frame structure of a beam configured for a terminal and a second frame structure of a beam configured for an interfering terminal;

a processing unit 703, configured to determine time domain location information of a time when the terminal and the interfering terminal generate cross slot interference according to the first frame structure and the second frame structure.

The present application also provides a computer-readable storage medium including computer-executable instructions that, when executed on a computer, cause the computer to perform the beam management method as provided in the above embodiments.

The present application also provides a computer program directly loadable into a memory and containing software code, which, when loaded and executed by a computer, is capable of implementing the beam management method provided in the above embodiments.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and the division of modules or units, for example, is merely a logical function division, and other manners of division are possible when actually implemented. For example, multiple units or components may be combined or may be integrated into another device, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units. The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A method of beam management, comprising:

sending first indication information to a terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the terminal to measure Reference Signal Received Power (RSRP) in a plurality of beam directions at the time indicated by the time domain position information;

receiving a plurality of RSRPs which are sent by the terminal and are in one-to-one correspondence with the plurality of beam directions;

determining the beam direction of the downlink signal of the terminal according to the plurality of RSRP; the plurality of RSRPs includes a plurality of L1-RSRPs and a plurality of SRS-RSRPs; the determining, according to the RSRP, a beam direction of a downlink signal of the terminal includes: when the maximum SRS-RSRP in the plurality of SRS-RSRP is larger than the RSRP threshold, determining the beam direction corresponding to the maximum L1-RSRP in the candidate set as the beam direction of the downlink signal of the terminal; the set of alternatives includes: at least one L1-RSRP in one-to-one correspondence with at least one SRS-RSRP less than the RSRP threshold of the plurality of SRS-RSRPs;

and sending second indication information for indicating the terminal to receive downlink signals according to the beam direction to the terminal.

2. The beam management method according to claim 1, wherein the first indication information further comprises: RSRP threshold; the RSRP threshold is used for determining whether the terminal has beam interference in a cross time slot;

the RSRP comprises reference signal received power L1-RSRP of a layer one and reference signal received power SRS-RSRP of a sounding reference signal; the time domain location information includes time domain location information for measuring the SRS-RSRP.

3. The beam management method according to claim 1, further comprising:

acquiring a first frame structure of a beam configured for the terminal and a second frame structure of a beam configured for an interference terminal;

4. A beam management apparatus, comprising: a transmitting unit, a receiving unit and a processing unit;

the sending unit is used for sending first indication information to the terminal; the first indication information comprises time domain position information at the moment when the terminal generates cross time slot interference; the first indication information is used for indicating the terminal to measure Reference Signal Received Power (RSRP) in a plurality of beam directions at the time indicated by the time domain position information;

the receiving unit is used for receiving a plurality of RSRPs which are sent by the terminal and are in one-to-one correspondence with the plurality of beam directions; the plurality of RSRPs includes a plurality of L1-RSRPs and a plurality of SRS-RSRPs; the processing unit is specifically configured to: when the maximum SRS-RSRP in the plurality of SRS-RSRP is larger than the RSRP threshold, determining the beam direction corresponding to the maximum L1-RSRP in the candidate set as the beam direction of the downlink signal of the terminal; the set of alternatives includes: at least one L1-RSRP in one-to-one correspondence with at least one SRS-RSRP less than the RSRP threshold of the plurality of SRS-RSRPs;

the processing unit is used for determining the beam direction of the downlink signal of the terminal according to the plurality of RSRP;

the sending unit is further configured to send second indication information to the terminal, where the second indication information is used to instruct the terminal to receive a downlink signal according to the beam direction.

5. The beam management apparatus of claim 4, wherein the first indication information further comprises: RSRP threshold; the RSRP threshold is used for determining whether the terminal has beam interference in a cross time slot;

6. The beam management apparatus of claim 4, further comprising: an acquisition unit;

the acquisition unit is used for acquiring a first frame structure of a beam configured for the terminal and a second frame structure of a beam configured for an interference terminal;

7. A beam management apparatus comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; the processor executing the computer-executable instructions stored in the memory when the beam management apparatus is operating, to cause the beam management apparatus to perform the beam management method of any one of claims 1-3.

8. A computer readable storage medium comprising computer executable instructions which, when run on a computer, cause the computer to perform the beam management method according to any of claims 1-3.