WO2019062724A1

WO2019062724A1 - Method for determining current state of beam reciprocity capability, and terminal

Info

Publication number: WO2019062724A1
Application number: PCT/CN2018/107400
Authority: WO
Inventors: 周武啸
Original assignee: 华为技术有限公司
Priority date: 2017-09-26
Filing date: 2018-09-25
Publication date: 2019-04-04
Also published as: CN109560839A

Abstract

Disclosed are a communication method, and a terminal. The method comprises: determining whether indication information related to a beam reciprocity capability reaches a pre-set condition, determining the current state of the beam reciprocity capability when the indication information reaches the pre-set condition, the current state being used for indicating whether the current apparatus has beam reciprocity capability when communicating with a network terminal based on beamforming; and reporting the current state to the network terminal. The solution disclosed in the embodiment of the present application facilitates the correct acquisition of the current state of a beam reciprocity capability.

Description

Method and terminal for determining current state of beam reciprocity capability

This application claims priority from the Chinese Patent Application of the State Intellectual Property Office of China, application number 201710878151.0, and the application of the name "a method and terminal for determining the current state of beam reciprocity capability" on September 26, 2017. The entire contents are incorporated herein by reference.

Technical field

The present application relates to the field of communications, and in particular, to a method and terminal for communication.

Background technique

In the fifth-generation (5G) communication technology, the application of spectrum resources in the high frequency band becomes an effective way to achieve large data rate communication. However, due to the wireless propagation characteristics of the high frequency band, the path attenuation in the high frequency band is large, so that the signal coverage in the high frequency band is limited. Large-scale antenna arrays can bring array gain through beamforming (BF), which effectively increases signal coverage and overcomes path attenuation in high frequency bands. Beamforming techniques focus the energy of the wireless signal, producing a directional beam with the strongest signal gain in a particular direction. Both the 5G base station and the 5G terminal have their own antenna arrays and multiple differently directed beams. Therefore, there is a beam alignment process when the base station and the terminal communicate with each other. The process must consider both the transmit beam and the receive beam. Beam management (BM) is especially important when selecting the best transmit-receive beam to ensure accurate and timely communication.

In order to efficiently and conveniently confirm the best transmit beam corresponding to a certain receive beam or the best receive beam corresponding to a certain transmit beam, 5G communication technology introduces the concept of beam reciprocity (BC) for multiple beams. The wireless communication system can simplify the beam management process and improve communication efficiency when the terminal has beam reciprocity capability. However, the state of the beam reciprocity capability of the terminal changes with the aging, temperature, and other conditions of the device, that is, the beam reciprocity capability may not be applicable to the terminal at a certain moment. In order to avoid the use of pre-set beam reciprocity capabilities, how to effectively determine whether beam reciprocability is still applicable is a problem.

Summary of the invention

The embodiment of the present application provides a method and a terminal for communication, which facilitates the network to correctly acquire the current state of the beam reciprocity capability of the terminal.

A first aspect of the present application provides a method of communication, the method comprising:

Determining whether the indication information related to the beam reciprocity capability reaches a preset condition; when the indication information reaches the preset condition, determining a current state of the beam reciprocity capability, the beam reciprocity capability indicating that the current device is Correspondence between a transmit beam for signal transmission and a receive beam for signal reception in beamforming, the current state being used to indicate whether the current device has the above beam when communicating with the network based on the beamforming Reciprocity capability; report the current status to the network.

The preset indication information is used to adaptively determine whether the current device has the capability of beam reciprocity, and ensures that the current device can report the state of the beam reciprocity capability in time, thereby further facilitating the current device and the network end in the subsequent beam communication process. Use beam reciprocity capabilities.

In a possible design, after the current status is reported to the network, the method further includes: receiving, by the network, indication information that is sent by using Downlink Control Information (DCI), where the indication information includes: performing an uplink beam. Scan, stop uplink beam scanning, or perform at least one of uplink transmit beam angle compensation.

In a possible design, the foregoing indication information is the usage duration of the beam reciprocity capability, and the corresponding preset condition is a usage duration threshold of the beam reciprocity capability.

In a possible design, the foregoing indication information is a number of times the random access failure is initiated based on the beam reciprocity capability, and the corresponding preset condition is a threshold number of times the random access fails.

In a possible design, the indication information is a usage duration of the beam reciprocity capability and a number of times the random access failure is initiated based on the beam reciprocity capability, and the corresponding preset condition is the beam reciprocity capability. The usage duration threshold and the number of times the random access fails.

In a possible design, determining a current state of the beam reciprocity capability includes: transmitting a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtaining a first uplink transmit beam indicated by the network, where The first uplink transmit beam is the best uplink transmit beam of the plurality of uplink transmit beams measured by the network; and the second uplink transmit corresponding to the best downlink receive beam of the multiple downlink receive beams is calculated based on the beam reciprocity capability a beam; when an angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than an angle threshold, determining that the current state is an indication that the current device does not have the beam reciprocity capability; when the first uplink transmit beam and the first The difference between the two uplink transmit beams is not greater than the foregoing angle threshold, and the current state is determined to indicate that the current device has the beam reciprocity capability.

In a possible design, determining a current state of the beam reciprocity capability includes: transmitting a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtaining a first uplink transmit beam indicated by the network, where The first uplink transmit beam is the best uplink transmit beam of the plurality of uplink transmit beams measured by the network end; and the second uplink corresponding to the best downlink receive beam of the plurality of downlink receive beams is calculated based on the beam reciprocity capability Transmitting a beam; when the first uplink transmit beam is different from the second uplink transmit beam, determining that the current state is indicating that the current device does not have the beam reciprocity capability; and when the first uplink transmit beam and the second uplink are If the transmit beams are the same, then the current state is determined to indicate that the current device has the beam reciprocity capability.

In a possible design, the best downlink receiving beam is measured during the downlink synchronization between the current device and the network, and the current device receives the system message sent by the network in the downlink synchronization process. The downlink synchronization process precedes the sending of the random access preamble sequence preamble.

In a possible design, obtaining the first uplink transmit beam indicated by the network includes: receiving a random access response RAR from the network, and obtaining the first uplink transmit beam by using the indication information of the RAR.

In a possible design, the method further includes: receiving a capability query indication initiated by the network, generating a capability query result based on the capability query indication, the capability query result includes the current state; and reporting the current state to the foregoing The network includes: reporting the capability query result to the network.

The reporting method performs the reporting of the current state of the beam reciprocity capability through the capability reporting and synchronization process. If the current device has already initiated an attach, the capability information is saved in the Mobility Management Entity (MME) of the network. The base station does not initiate a capability query request even if the current device beam reciprocity capability changes. Therefore, in a possible design, before receiving the terminal capability query indication initiated by the network, the method further includes: attaching a detach from the network; attaching an attach to the network, to trigger the network to send The ability to query instructions.

In a possible design, when the current state of the beam reciprocity capability is changed, the current state of the beam reciprocity can be reported automatically, without waiting for the base station to initiate a capability query request, and reporting the current state to the network includes: actively reporting the beam reciprocity capability. The field is given to the network, and the beam reciprocity capability field contains the current state of the beam reciprocity capability.

A second aspect of the present application provides a terminal, where the terminal includes:

a determining module, configured to determine whether the indication information related to the beam reciprocity capability reaches a preset condition, and a determining module, configured to determine a current state of the beam reciprocity capability when the indication information reaches the preset condition, The beam reciprocity capability indicates a correspondence between a transmit beam used for signal transmission in the beamforming and a receive beam for signal reception, the current state being used to indicate that the terminal is based on the beamforming and Whether the network end communication has the capability of the beam reciprocity; the reporting module is configured to report the current status to the network end.

In a possible design, the determining module is specifically configured to: send a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtain a first uplink transmit beam indicated by the network, where the first uplink transmit beam is The best uplink transmit beam of the plurality of uplink transmit beams measured by the network; calculating, according to the beam reciprocity capability, the second uplink transmit beam corresponding to the best downlink receive beam of the multiple downlink receive beams; And determining, by the current state, that the terminal does not have the beam reciprocity capability; and between the first uplink transmit beam and the second uplink transmit beam, the angle difference between the transmit beam and the second uplink transmit beam is greater than an angle threshold. If the angle difference is not greater than the angle threshold, the current state is determined to indicate that the terminal has the beam reciprocity capability.

In a possible design, the determining module is specifically configured to: send a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtain a first uplink transmit beam indicated by the network, where the first uplink transmit beam is The best uplink transmit beam of the plurality of uplink transmit beams measured by the network; the second uplink transmit beam corresponding to the best downlink receive beam of the plurality of downlink receive beams is calculated based on the beam reciprocity capability; An uplink transmit beam is different from the second uplink transmit beam, and determining that the current state is a capability indicating that the terminal does not have the beam reciprocity; and when the first uplink transmit beam is the same as the second uplink transmit beam, determining the The current state is indicative of the terminal having the beam reciprocity capability.

In a possible design, the best downlink receiving beam is measured in the process of establishing downlink synchronization between the terminal and the network, and the terminal receives the system message sent by the network in the downlink synchronization process, the downlink The synchronization process precedes the sending of the random access preamble sequence preamble.

In a possible design, the determining module is specifically configured to: receive a random access response RAR from the network, and obtain the first uplink transmit beam by using the indication information in the RAR.

In a possible design, the terminal further includes a generating module, configured to receive a capability query indication initiated by the network, and generate a capability query result according to the capability query indication, where the capability query result includes the current state; It is used to: report the capability query result to the network.

If the terminal has already initiated the attach to the network, the terminal capability is saved in the MME of the network, and can be delivered to the base station through an Initial Context Setup Request message, so the capability is known to the base station. Based on this, when the current state of the beam reciprocity capability changes, in order to ensure the synchronization of the terminal capability, in a possible design, the terminal further includes a query triggering module for de-detaching from the network. Attaching an attach to the network to trigger the network to initiate the capability query indication.

The reporting module of the terminal needs to wait for the base station to initiate the UE capability query request. In another possible design, the reporting module of the terminal can actively report the current state to the network when the status of the beam reciprocity capability changes. The reporting module is specifically configured to: actively report a beam reciprocity capability field to the network, where the beam reciprocity capability field includes the current state.

In a possible design, the terminal further includes a reporting triggering module, configured to determine whether the current state is the same as a historical state reported to the network last time; when the current state is different from the historical state, triggering the current The status is reported to the operation of the network.

A third aspect of the present application provides a terminal, where the terminal includes:

The processor is configured to: determine whether the indication information related to the beam reciprocity capability reaches a preset condition; and when the indication information reaches the preset condition, determine a current state of the beam reciprocity capability, The beam reciprocity capability indicates a correspondence between a transmit beam used for signal transmission in the beamforming and a receive beam for signal reception, the current state being used to indicate that the terminal is based on the beam Forming whether to have the beam reciprocity capability described above when communicating with the network; reporting the current status to the network.

In one possible design, the terminal further includes a memory for storing program instructions for driving the processor to perform the operations described above.

In one possible design, the terminal further includes: a transceiver. The processor instructs the transceiver to perform an operation of reporting the current status to the network.

In one possible design, the memory comprises at least one of a computer readable storage medium, a floppy disk device, a hard disk device, an optical disk device, or a magnetic disk device.

In a possible design, the processor is further configured to: send a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtain a first uplink transmit beam indicated by the network, the first The uplink transmit beam is the best uplink transmit beam of the plurality of uplink transmit beams measured by the network; and the second uplink transmit beam corresponding to the best downlink receive beam of the plurality of downlink receive beams is calculated based on the beam reciprocity capability; When the angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than an angle threshold, determining that the current state is indicating that the terminal does not have the beam reciprocity capability; when the first uplink transmit beam and the second uplink transmit If the angle difference between the beams is not greater than the foregoing angle threshold, the current state is determined to indicate that the terminal has the beam reciprocity capability. Optionally, the processor instructs the transceiver to perform an operation of transmitting a random access preamble.

In a possible design, the processor is further configured to: send a random access preamble sequence preamble to the network by using multiple uplink transmit beams; obtain a first uplink transmit beam indicated by the network, the first The uplink transmit beam is the best uplink transmit beam of the plurality of uplink transmit beams measured by the network; and the second uplink transmit beam corresponding to the best downlink receive beam of the plurality of downlink receive beams is calculated based on the beam reciprocity capability. When the first uplink transmit beam is different from the second uplink transmit beam, determining that the current state is indicating that the terminal does not have the beam reciprocity capability; when the first uplink transmit beam is the same as the second uplink transmit beam And determining the current state to indicate that the terminal has the beam reciprocity capability. Optionally, the processor instructs the transceiver to perform an operation of transmitting a random access preamble.

In a possible design, the processor is further configured to perform the following operations: receiving a random access response RAR from the network, and obtaining the first uplink transmit beam by using the indication information in the RAR. Optionally, the processor instructs the transceiver to perform an operation of receiving the RAR.

In a possible design, the processor is further configured to: receive a capability query indication initiated by the network, generate a capability query result based on the capability query indication, the capability query result includes the current state; The query result is reported to the network. Optionally, the processor instructs the transceiver to perform an operation of receiving a capability query indication. Optionally, the processor instructs the transceiver to perform an operation of reporting the capability query result to the network.

In a possible design, the processor is further configured to perform the following operations: de-detaching from the network; attaching an attach to the network to trigger the network to initiate the capability query indication.

In a possible design, the UE may actively report when the current state of the beam reciprocity capability changes, without waiting for the base station to initiate a UE capability query request. Therefore, the processor is further configured to perform the following operations: actively reporting the beam The reciprocity capability field is given to the network, and the beam reciprocity capability field includes the current state of the beam reciprocity capability. Optionally, the processor actively instructs the transceiver to perform an operation of reporting a beam reciprocity capability field.

A fourth aspect of the present application provides a communication system, the communication system comprising:

Base station and terminal; the terminal for performing the steps performed by the terminal in the method described in the first aspect or any of its possible designs.

A fifth aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer or processor, cause the computer or processor to perform the first aspect as described above Or the method described in any of its possible designs.

A sixth aspect of the present application provides a computer program product comprising instructions which, when run on a computer or processor, cause the computer or processor to perform as in the first aspect described above or in any of its possible designs The method described.

As can be seen from the foregoing technical solutions, the embodiment of the present application has the following advantages: adaptively determining the state of the terminal beam reciprocity capability, and reporting the state to the network, so that the network can correctly obtain the beam reciprocity of the terminal. The current state of sexual ability improves the accuracy of communication.

DRAWINGS

1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of hardware of an access network device 20 and a terminal 30 in communication according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of beam communication between a base station and a terminal according to an embodiment of the present disclosure;

FIG. 4 is a flowchart of a method for adaptively determining a state in which a beam reciprocity capability is provided according to an embodiment of the present disclosure;

FIG. 5 is a flowchart of a method for determining whether an indication information reaches a preset condition according to an embodiment of the present disclosure;

FIG. 6 is a flowchart of another method for determining whether an indication indication information reaches a preset condition according to an embodiment of the present disclosure;

FIG. 7 is a signaling flowchart of determining a current state of beam reciprocity capability according to an embodiment of the present disclosure;

FIG. 8 is a signaling flowchart of another current state for determining beam reciprocity capability according to an embodiment of the present disclosure;

FIG. 9 is a signaling flowchart of a current state of a report beam reciprocity capability according to an embodiment of the present disclosure;

FIG. 10 is a signaling flowchart of another current state of reporting beam reciprocity capability according to an embodiment of the present disclosure;

FIG. 11 is a signaling flowchart of a beam management process according to an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed ways

The terms "first", "second", "third" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. order. Furthermore, the terms "comprises" and "comprising" and "the" are intended to cover a non-exclusive inclusion, for example, encompassing a series of steps or units. The method, system, product, or device is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not explicitly listed or are inherent to such processes, methods, products, or devices.

As shown in FIG. 1 , a communication system 100 provided by an embodiment of the present application. The communication system 100 includes an access network device 20 and one or more terminals 30 coupled to the access device 20.

The access network device 20 is a wireless network node capable of providing the terminal 30 with, for example, voice calls, video, data, messaging, broadcast, or other various wireless communication services. Since mobile communication is also called cellular communication, the access network device 20 can form one or more cells and serve multiple terminals 30 present within the cell. Illustratively, the access network device 20 can be a base station, a relay station, or other wireless access point or the like. The base station supports various types of wireless communication protocols, such as a base transceiver station (Base Transceiver Station, BTS) in a Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) network. The NB (NodeB) in the Wideband Code Division Multiple Access (WCDMA), or the eNB or the eNodeB (Evolutional NodeB) in the Long Term Evolution (LTE), or It is an eNB in IoT or NB-IoT. The access network device 20 may also be a gNB (New Radio Node B) in a 5th generation (5th generation) mobile communication network, and each gNB has multiple transmission and reception points (TRPs) and accesses. The network device 20 may also be the transmitting and receiving station, and the access network device may also be a network device in a publicly evolved Public Land Mobile Network (PLMN).

The terminal 30 is also called a user equipment (UE), and may be an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, or a terminal device. Wait. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a global positioning system. (Global Positioning System, GPS), cameras, audio players, and other types of products such as handheld devices, in-vehicle devices, and wearable devices with wireless communication capabilities, terminals in future 5G networks, or terminals in future evolved PLMN networks. For example, the common form of the terminal 30 is a smart terminal, including a mobile phone, a tablet computer, or a wearable device, which is not specifically limited in this embodiment of the present application. The terminal 30 can support at least one of the above various types of wireless communication protocols supported by the access network device 20 to implement communication with the access network device 20.

FIG. 2 is a schematic diagram showing the hardware structure of the access network device 20 and the terminal 30 provided by the embodiment of the present application. The terminal 30 includes at least one processor 301, at least one memory 302, and at least one transceiver 303. Optionally, the terminal 30 may further include one or more antennas 31, an output device 304, and an input device 305.

The processor 301, the memory 302, and the transceiver 303 are coupled by a connector, and the connector may include various types of interfaces, transmission lines, or buses, etc., which are not limited in this embodiment. In various embodiments of the present application, coupling refers to interconnections in a particular manner, including being directly connected or indirectly connected by other devices. The processor 301 may include at least one of the following types: a central processing unit (CPU), a digital signal processor (DSP), a microprocessor, and an application specific integrated circuit (ASIC). , Microcontroller Unit (MCU), Field Programmable Gate Array (FPGA), or integrated circuit for implementing logic operations. For example, the processor 301 can be a single-CPU processor or a multi-core processor. The plurality of processors or units included within processor 301 may be integrated in one chip or on multiple different chips. Illustratively, as shown in FIG. 2, a communication processor 3010 can be included in the processor 301.

The chip involved in the embodiment of the present application is a system fabricated on the same semiconductor substrate by an integrated circuit process, also called a semiconductor chip, which may be fabricated on the substrate by an integrated circuit process (usually, for example, silicon). The collection of integrated circuits formed on the semiconductor material, the outer layer of which is typically encapsulated by a semiconductor package material. The integrated circuit may include various functional devices, each of which includes a logic gate circuit, a metal-oxide-semiconductor (MOS) transistor, a bipolar transistor or a diode, and may also include a capacitor and a resistor. Or other components such as inductors. Each functional device can work independently or with the necessary driver software to implement various functions such as communication, computing, or storage.

The memory 302 in FIG. 2 may be a non-power-down volatile memory, such as an EMMC (Embedded Multi Media Card), a UFS (Universal Flash Storage), or a Read-Only Memory (Read-Only Memory). ROM), or other types of static storage devices that can store static information and instructions, and can also be volatile memory, such as random access memory (RAM) or can store information and Other types of dynamic storage devices of instructions may also be Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical discs. Storage, optical storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or capable of carrying or storing program code in the form of instructions or data structures and capable of Any other computer readable storage medium accessed by a computer, but is not limited thereto. The memory 302 can be stand-alone and coupled to the processor 301 via a connector. The memory 302 can also be integrated with the processor 301. The memory 302 can store various types of computer program code for executing the program code of the solution of the present application, and is controlled and executed by the processor 301. The various types of computer program code executed can also be regarded as the driver of the processor 301. program. For example, processor 301 is operative to execute computer program code stored in memory 302 to implement the methods in subsequent embodiments of the present application. The computer program code is large in number and can form computer executable instructions executable by at least one of the processors 301 to drive the associated processor to perform various types of processing, such as communication signals supporting the various types of wireless communication protocols described above. Processing algorithms, operating system runs, or application runs.

Transceiver 303 can be any device for effecting communication signal transceiving that can be coupled to antenna 31. The transceiver 303 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 31 are used to receive radio frequency signals, and a receiver Rx of the transceiver 303 is configured to receive the radio frequency signals from an antenna and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and The digital baseband signal or digital intermediate frequency signal is provided to a communication processor 3010 included in the processor 301 for the communication processor 3010 to further process the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 303 is further configured to receive the modulated digital baseband signal or digital intermediate frequency signal from the communication processor 3010, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal and pass One or more antennas 31 transmit the radio frequency signals. Specifically, the receiver Rx may selectively perform one or more stages of downmix processing and analog to digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal, the downmix processing and the analog to digital conversion processing. The order is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or the digital intermediate frequency signal to obtain a radio frequency signal, the upmixing processing and the digital to analog conversion processing. The order is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

Output device 304 is in communication with processor 301 and can display information in a variety of ways. For example, the output device 304 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. Wait. Input device 305 is in communication with processor 301 and can accept user input in a variety of ways. For example, input device 305 can be a mouse, keyboard, touch screen device, or sensing device, and the like.

The antenna 31 may be an antenna array having multiple antenna elements, and the multiple antenna elements apply multiple sets of beamforming weights to form a plurality of beams. Specifically, when the terminal 30 is a 5G terminal, the antenna 31 is a large-scale antenna array, and is generated. Multiple receive and transmit beams.

The access network device 20 includes at least one processor 201, at least one memory 202, at least one transceiver 203, one or more antennas 21, and at least one network interface 204. Specifically, the antenna 21 may be an antenna array having multiple antenna elements. Processor 201, memory 202, transceiver 203, and network interface 204 are coupled by a connector. The network interface 204 is configured to be coupled to the core network device 10 via a communication link, such as an S1 interface. Or the network interface 204 is connected to the network interface of other access network devices via a wired or wireless link, such as an X2 interface. The connection mode is not shown in the figure, and the embodiment of the present application does not specifically limit the specific connection mode. In addition, the related description of the antenna 21, the processor 201, the memory 202, and the transceiver 203 can refer to the description of the antenna 31, the processor 301, the memory 302, and the transceiver 303 in the terminal 30 to implement similar functions, for example, the processor 201 can A communication processor is included for polar coding the information or data that needs to be sent to the terminal 30 to obtain a coded sequence, and modulating the coded sequence to generate modulated data for transmission to the antenna through the transmitter Tx in the transceiver 303. .

Based on the foregoing description, the embodiment of the present application can be extended to more communication application scenarios, which is not limited in this embodiment. Although the following embodiments mainly use a mobile communication scenario as an example, the user can be understood in any communication scenario. The communication device used can be regarded as a user device, and the peer device that communicates with the device held by the user can be regarded as a wireless network node. Therefore, the above communication application scenario is only for convenience of description, and is not used to strictly limit the embodiment.

Further, for convenience of description, in the following description, the base stations mentioned in the embodiments of the present application are all examples of the access network device 20, and the base station can be replaced with any of the foregoing access network devices 20. Other examples. In addition, the network end mentioned in the embodiment of the present application may include the access network device 20, and may further optionally include a core network device.

Illustratively, in the 5G communication technology, both the 5G base station and the 5G terminal configure the antenna array, and in order to counter the path attenuation and effectively increase the signal coverage, the base station usually uses a plurality of narrow beams with different pointing directions, and correspondingly, there are multiple terminals on the terminal side. Differently directed narrow beams mean that in a 5G communication system, to achieve efficient communication between the base station and the terminal, it is necessary to select an appropriate transceiver beam pair. In this multi-beam scenario, beam management is a very important technology. Beam management is a set of communication protocol procedures for obtaining and maintaining a set of base station side beams and terminal side beams for downlink transmission and uplink transmission. The beam management includes at least one of Beam Determination, Beam Measurement, Beam Reporting, and Beam Sweeping. The downlink beam management process is to find at least one of a suitable base station transmit beam or a terminal receive beam for downlink transmission. In the current communication technology, three processes of downlink beam management are included:

P-1: the terminal device measures different downlink transmit beams from the base station by using different downlink receive beams to determine a downlink transmit beam of the base station and a downlink receive beam of the terminal side;

P-2: the terminal device measures different downlink transmit beams from the base station by using the same downlink receive beam to determine a downlink transmit beam of the base station;

P-3: The terminal device uses different downlink receiving beams to measure the same downlink transmitting beam from the base station to determine the downlink receiving beam on the terminal side.

Correspondingly, the uplink beam management process is to find at least one of a suitable base station receive beam or a terminal transmit beam for uplink transmission. There are also three processes for uplink beam management:

U-1: the base station uses different uplink receiving beams to measure different uplink transmit beams of the terminal, to determine the uplink transmit beam on the terminal side and the uplink receive beam on the base station side;

U-2: the base station uses different uplink receiving beams to measure the same uplink transmit beam of the terminal to determine an uplink receiving beam on the base station side;

U-3: The base station uses the same uplink receive beam to measure different uplink transmit beams of the terminal to determine the uplink transmit beam of the terminal.

It should be understood that the entire process of downlink beam management and the entire process of uplink beam management are not indispensable processes. In some specific cases, only one or two processes may be required, rather than all processes. The downlink transmission in the example refers to the transmission of the base station to the terminal, including but not limited to the transmission of data and control signaling, and the uplink transmission refers to the transmission of the terminal to the base station, including but not limited to the transmission of data and control signaling.

In order to facilitate the understanding of the beam communication and the beam management process between the base station and the terminal in the fifth generation communication system, a schematic diagram of the beam communication is provided in the embodiment of the present application. The base station specifically refers to the access network device 20, and the terminal 1 and the terminal 2 specifically refer to the foregoing terminal 30. Specifically, the base station 20 in FIG. 3 is a 5G base station, and the terminal 30 is a 5G terminal, and the base station 20 and the terminal 30 are used. The beam mode transmits data to each other on resources in the high frequency band. Specifically, the antenna element is disposed on the base station 20 and the terminal 30. The base station 20 can set a phase shifter on its own radio frequency end, and change the phase weight of the antenna array element through the phase shifter, so that the energy of the wireless signal is in a certain direction. Focusing on, forming a directional beam, and transmitting downlink data to the terminal 30 through the beam; correspondingly, the terminal 30 can also set a phase shifter on the radio frequency end of the terminal to implement analog phase weighting on the antenna array element to form a corresponding The receiving beam receives the downlink data transmitted by the base station 20. The following line transmission in FIG. 3 is taken as an example for explanation.

Generally, in order to effectively increase the signal coverage, the 5G base station uses a plurality of differently directed beams. As shown in FIG. 3, the base station uses a total of 8 beams of t1-t8. In the downlink transmission process, the base station sequentially uses different directed beams to transmit wireless. Signal, so the base station needs to perform a downlink transmit beam scan to select the best transmit beam for a certain terminal. Correspondingly, the terminal also uses a plurality of differently directed beams. As shown in FIG. 3, the terminal 1 uses four beams of r1-r4, and the terminal 2 uses four beams of u1-u4, and the two terminals respectively need to perform downlink receiving. The beam scan transforms different downlink receive beams for the downlink transmit beams and selects the best downlink receive beams therefrom, thereby generating respective optimal downlink transmit-receive beam pairs. The optimal downlink transmit-receive beam pairs corresponding to terminal 1 and terminal 2 in FIG. 3 are (t4, r3) and (t6, u2), respectively. It should be understood that the number of beams on the base station side and the terminal side is only one case enumerated in the embodiment of the present application, and the actual number of beams may be various. Similarly, the number of base stations and terminals does not provide any technical solution provided by the present application. The composition is limited.

In order to increase the signal gain as much as possible, the beam of the 5G base station and the terminal has strong directivity and the beam is narrow. Once the beam is directed away from the terminal, the communication quality between the base station and the terminal will be affected. Therefore, beam selection and alignment are critical to achieving efficient communication between the base station and the terminal.

The beam reciprocity capability is used to indicate a correspondence between a transmit beam for signal transmission and a receive beam for signal reception in beamforming. The terminal can obtain parameter information of the corresponding transmit beam based on the parameter information of the existing receive beam. For example, the characteristic parameters such as the spatial azimuth of the uplink transmit beam of the terminal are known, and the corresponding beam reciprocity capability can be obtained. The spatial azimuth of the best downlink receive beam. Exemplarily, the characteristic parameters such as the spatial azimuth of the uplink receiving beam of the base station are known, and the spatial azimuth of the corresponding optimal downlink transmitting beam can be directly obtained by the beam reciprocity capability. Based on this, when the terminal and the base station have the beam reciprocity capability, the correspondence between the best transmit-receive beam pairs can be obtained without sequentially scanning and measuring multiple beams, which simplifies the beam management process and improves beam selection and The efficiency of alignment.

It should be understood that the beam reciprocity capability mentioned in all embodiments of the present application is a theoretical representation of the above-mentioned correspondence between transmit and receive beams, and the beam reciprocity-based capability calculation mentioned in all embodiments of the present application. Transceiver beams are calculated based on this theoretical characterization. Exemplarily, the beam reciprocity capability can be a transceiver beam comparison table, and a corresponding optimal receiving beam can be found based on a specific transmitting beam. Similarly, a corresponding optimal transmitting beam can be found based on a specific receiving beam. As shown in Table 1, is a possible example of the transceiver beam comparison table of the terminal. In this example, the terminal has four downlink receiving beams numbered 1-4 and four uplink transmitting beams numbered 1-4. If the terminal uses the downlink receiving beam No. 1 in the downlink receiving process, the corresponding optimal uplink transmitting beam can be directly found as the No. 3 uplink transmitting beam according to the table.

Table 1

下行接收波束Downlink receive beam	对应的最佳上行发射波束Corresponding optimal uplink transmit beam
1号下行接收波束Downstream receive beam	3号上行发射波束No. 3 uplink transmit beam
2号下行接收波束Downstream receive beam	4号上行发射波束No. 4 uplink transmit beam
3号下行接收波束Downstream receive beam No. 3	1号上行发射波束No. 1 uplink transmit beam
4号下行接收波束Downstream receive beam No. 4	2号上行发射波束No. 2 uplink transmit beam

Exemplarily, the beam reciprocity capability can also be a learning model with input and output. The learning model is obtained by analyzing and learning the historical best transmit-receive beam pair, and inputting the downlink receive beam, and outputting the corresponding maximum. The best uplink transmit beam, similarly, input downlink transmit beam, can output the corresponding optimal uplink receive beam.

It should be understood that the best representation of the best transmit-receive beam pairs mentioned in all embodiments of the present application is the best when the terminal and the base station perform beam communication based on the transmit-receive beam pair, correspondingly, The transmit beam in the best transmit-receive beam pair is the best transmit beam, and the receive beam in the best transmit-receive beam pair is the best receive beam. The measurement reference quantity according to the judgment of the signal quality may be Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ) or Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio). At least one of SINR).

In the process of the terminal performing uplink and downlink transmission based on the beam and the base station, if the actual optimal transmit-receive beam pair is consistent with the best transmit-receive beam pair calculated by the beam reciprocity capability, the terminal is considered to have beam reciprocity. Sexual ability. Still based on Table 1, the terminal uses the downlink receiving beam No. 2 to receive the signal transmitted by the base station. When the uplink transmitting beam is used to transmit signals to the base station, the signal quality of the communication between the terminal and the base station is the best, and the transmitting and receiving beams are compared. The best transmit and receive beam pairs (2, 4) given in the table are consistent, and the terminal is considered to have beam reciprocity at the moment.

Correspondingly, if the terminal is used due to the age of the terminal, or because the operating temperature of the terminal is abnormal at a certain time, the receiving and transmitting beams actually used by the terminal in communicating with the base station are offset from the initial receiving and transmitting beams. Therefore, when the terminal uses the downlink receiving beam No. 2 to receive the signal sent by the base station, it needs to use the uplink transmitting beam No. 3 to send a signal to the base station, so that the signal quality of the communication between the terminal and the base station is the best, that is, the actual optimal transmitting and receiving beam pair at this time. It is (2, 3), which is inconsistent with the transceiving beam pair (2, 4) given in the transceiver beam comparison table. In this case, the terminal is considered to have no beam reciprocity capability.

Therefore, for the embodiment of the present invention, whether the terminal has the beam reciprocity capability in the communication may be: whether the beam reciprocity capability is still applicable to the communication requirement of the terminal; or in the communication for the terminal In other words, the beam reciprocity capability is still acceptable for meeting the communication requirements of the terminal. For example, the communication requirements may be communication quality requirements as previously described, including but not limited to RSRP, RSRQ, or SINR requirements.

Whether the terminal has the beam reciprocability capability in the current state is changed. Specifically, whether the terminal has the beam reciprocability capability in the current state is related to the characteristics of the physical device, and when the characteristics of the physical device change, the physics based The spatial azimuth of the received and transmitted beams generated by the device changes such that the actual optimal transmit beam pair is different from the theoretical transmit beam pair. The factors affecting the physical device characteristic parameters all affect the current state of the beam reciprocity capability. Illustratively, the physical device may include a transmit RF chain in the transmitter Tx, a receive RF chain in the receiver Rx, a phase shifter or an antenna. At least one of the arrays, factors affecting physical device characteristic parameters may include age, operating temperature, humidity, and other environmental factors.

In a feasible solution, when the terminal is shipped from the factory, the transceiver beam comparison table is stored in the terminal as a preset transceiving beam reciprocity capability, and the preset is always used and reported during the terminal communication process. The beam reciprocity capability is given to the network side, such as a base station. However, in actual use, the terminal may not have the beam reciprocity capability in a certain period of time, but still use and report the preset beam reciprocity capability, which may cause the terminal to use an inappropriate transceiver beam pair. The communication quality of the terminal; in another possible case, the terminal recovers the beam reciprocity capability after a period of time, but because the state is not known in time, the best transmit and receive beam pairs are always selected by scanning the beam, and the communication of the terminal is reduced. effectiveness.

The embodiment of the present application provides a method for adaptively determining a state in which a beam reciprocity capability is located, and ensures that the terminal always uses and reports an accurate beam reciprocity capability. For ease of understanding, the embodiment of the present application describes a method for adaptively determining the state of the beam reciprocity capability in the form of a step, although the sequence of the method is shown in the method flowchart, but in some cases The steps described may be performed in a different order than here.

FIG. 4 is a flowchart of a method for adaptively determining a state in which a beam reciprocity capability is provided according to an embodiment of the present disclosure, where the method specifically includes:

Step 401: Determine whether the indication information related to the beam reciprocity capability reaches a preset condition.

Since the beam reciprocity capability of the terminal is related to the characteristics of the physical device, the state of the terminal beam reciprocity capability is not fixed. Specifically, with the change of usage time and environmental factors, the terminal may change from having the beam reciprocity capability to having no beam reciprocity; correspondingly, the terminal temporarily loses the beam reciprocity due to the influence of the harsh environment. Sexual ability, with the elimination of harsh environmental factors, the terminal may restore beam reciprocity. In the solution of the embodiment of the present application, it is determined whether it is necessary to determine the current state of the terminal by determining whether the indication information related to the beam reciprocity capability reaches a preset condition. The foregoing indication information includes at least one of the following: the duration of use of the beam reciprocity capability or the number of times the random access failure is initiated based on the beam reciprocity capability. The preset condition includes at least one of: a usage duration threshold of the beam reciprocity capability or a threshold number of random access failures, which may be set by a person skilled in the art according to historical experience values. It should be understood that determining whether the indication information reaches the preset condition is repeatedly performed in the process of the terminal communicating with the base station.

Two specific implementations of step 401 are given below.

FIG. 5 is a specific implementation manner of determining whether the indication information related to the beam reciprocity capability reaches a preset condition provided by the embodiment of the present application:

Step 501: Record the beam reciprocity capability using the duration T.

The duration used herein refers to the total duration of beam communication based on the beam reciprocity capability of the terminal based on a certain state. The beam communication herein includes uplink and downlink transmission processes of the terminal and the base station based on beam completion data, control signaling, and the like. For example, the schematic process of the beam communication given in FIG. 3 can be referred to.

Step 502: Determine whether T exceeds a preset usage time threshold T_thr?

The usage time threshold is determined by a person skilled in the art based on historical empirical values. In an alternative, the empirical value can be obtained by big data analysis. If the beam reciprocity capability usage duration T does not exceed the usage duration threshold, then go to step 501 to continue recording the usage duration of the beam reciprocity capability; if the usage duration T exceeds the usage duration threshold, proceed to step 503.

Step 503: The usage duration of the beam reciprocity capability reaches a preset usage duration threshold, and T is cleared.

Determining whether the use duration of the beam reciprocity capability reaches the usage duration threshold is repeated when the terminal performs beam communication with the base station, so the usage duration T is cleared to perform the use of the beam reciprocity capability in the next judgment. Retimed.

FIG. 6 is another specific implementation manner of determining whether the indication information related to the beam reciprocability capability reaches a preset condition provided by the embodiment of the present application:

Step 601: Record the number N of random access failures initiated based on the beam reciprocity capability.

The terminal initiates random access to the base station to establish a connection between the terminal and the base station, and allocates a unique identifier to the terminal, thereby implementing uplink synchronization and completing uplink transmission. In the 5G communication, when the terminal initiates random access to the base station, the terminal sends a random access preamble sequence preamble through the uplink transmit beam, and the base station sends a random access response (RAR) through the downlink transmit beam, and further, the terminal The RAR transmitted by the base station is received by the downlink receiving beam. When the current state of the terminal is not capable of beam reciprocity, the best transmit-receive beam pair obtained by transmitting and receiving the beam collation table is no longer the actual best transmit-receive beam pair. In one possible case, the terminal The uplink transmit beam of the random access preamble preamble is inaccurate, so that the base station does not receive the random access preamble preamble. At this time, the random access fails; in one possible case, the base station receives the preamble sent by the terminal. However, the downlink transmit beam that the base station sends the RAR is not aligned with the downlink receive beam pair that the terminal receives the RAR, and the terminal may not receive the RAR sent by the base station after the preamble is sent, thereby causing random access failure.

Step 602: Determine whether N exceeds a preset random access failure threshold N_thr?

In addition to the scenario that causes random access failure described in step 601, there are other factors that cause random access failure in the actual communication process. Therefore, within a certain range, random access failure is a normal phenomenon, but when random If the number of access failures exceeds a certain threshold, it is reasonable to assume that the terminal no longer has beam reciprocity capability.

The above-mentioned random access failure threshold is determined by a person skilled in the art based on historical experience values. In an alternative solution, the empirical value can be obtained by big data analysis. If the number of random access failures based on the beam reciprocity capability does not exceed the threshold of the number of times, go to step 601 to continue recording the number of times the random access failure is initiated based on the beam reciprocity capability; if the number N exceeds the number of times If the threshold is reached, step 603 is performed.

Step 603: The number of times the random access failure is initiated based on the beam reciprocity capability reaches a preset number of times threshold, and N is cleared.

Determining whether the number of times the random access failure is initiated based on the beam reciprocity capability reaches a preset number of times threshold is repeated when the terminal performs beam communication with the base station, and then N is cleared to be based on the beam mutual interference in the next judgment. The number of times the eligibility capability initiates a random access failure is recounted.

Step 402: Determine a current state of the beam reciprocity capability when the indication information reaches a preset condition.

When the indication information reaches the preset condition, it is necessary to confirm the current state of the beam reciprocity capability. The current state is used to indicate whether the terminal has beam reciprocity capability when communicating with the network based on beamforming technology. In an alternative, the process of determining the current state of the beam reciprocity capability may be implemented by a software module stored or configured in the processor, such as in the previously mentioned communication processor 3010. Further, a flag F may be set to determine whether to execute the software module. Optionally, the flag F may be a variable stored or configured in the processor, when the indication information reaches a preset condition, Let the flag be F=True. At this time, execute the above software module to determine the current state of the beam reciprocity capability. In another optional solution, the foregoing determining process may be implemented by using a hardware module or a combination of a software module and a hardware module. The implementation manner of the foregoing determining process is not limited.

A specific implementation of the step 402 provided by the embodiment of the present application is shown in FIG. 7. In this specific solution, the initial state of the terminal is considered to have the capability of beam reciprocity.

When a new random access arrives, the following steps are performed to trigger a random access procedure. The type of the event that triggers the random access procedure is not limited.

Step 701: The terminal turns off the beam reciprocity capability, and sends a random access preamble to the base station according to the multiple uplink transmit beams.

As mentioned above, the transceiving beam look-up table characterizing the beam reciprocity capability of the terminal can be stored in the terminal at the time of shipment from the terminal, for example, can be stored in the memory 302 as a pre-set beam reciprocity capability. Optionally, the beam reciprocity capability can also be characterized by a learning model with input and output. The learning model is obtained by analyzing and learning the historical best transmit-receive beam pair, inputting the downlink receive beam, and outputting the corresponding The best upstream transmit beam. The capability of the transceiving beam reciprocity can also be characterized by a hardware logic module. The technical solution in the embodiment of the present application does not limit the characterization form of the beam reciprocity capability. Because it is necessary to judge whether the terminal currently has beam reciprocity capability, it is necessary to turn off the preset beam reciprocity capability, obtain the best measured transmit-receive beam pair, and obtain the theoretical maximum with beam reciprocity. Good transmit receive beam pairs are compared. The preset beam reciprocity capability can be disabled in various implementation manners. In an optional solution, a switch can be set on the user interface of the terminal, and the user can receive the indication message to reach the preset condition. After the prompt is triggered, the switch is manually disabled to disable the beam reciprocity. The processor of the terminal, such as the communication processor 3010, may also store or configure a flag bit as a switch of the beam reciprocity capability, and the pre-preg is obtained by receiving the indication message. Automatically change the flag bit after the condition prompts to turn off the beam reciprocity. After the beam reciprocity capability is turned off, the terminal transmits a random access preamble sequence preamble in each uplink transmit beam because the terminal does not know which uplink transmit beam can achieve the best connection with the base station.

Step 702: The base station detects each uplink transmit beam of the terminal by using each uplink receive beam, and measures the best uplink transmit beam in the process of transmitting the preamble by the terminal as the first uplink transmit beam.

Specifically, the base station separately receives and transmits a signal transmitted by each uplink transmit beam of the preamble by using each uplink receive beam, to obtain an optimal uplink transmit-receive beam pair, and uplink transmit in the uplink transmit-receive beam pair. The beam is the best uplink transmit beam, and the best uplink transmit beam is recorded as the first uplink transmit beam. It should be understood that the best uplink transmit-receive beam pair means that the signal quality is best when the transmit-receive beam pair is used between the terminal and the base station for communication. The random access preamble sent by the terminal is sent to the base station through the first uplink transmit beam.

Step 703: The base station sends an RAR to the terminal by using a downlink transmit beam, where the RAR carries the indication information of the first transmit beam.

Before the arrival of the new random access, the terminal and the base station have established downlink synchronization. In the process of establishing the downlink synchronization, the base station sends a system message by using multiple downlink transmit beams, and the system message includes at least one of the following: a frequency bandwidth indication, Selectable cell information, cell access related information, random access channel parameters, random access preamble initial power, etc., and each downlink receiving beam receives the system message sent by each downlink transmitting beam of the base station. And performing measurement, when the communication signal quality between the terminal and the base station is the best, the optimal downlink downlink beam of the terminal and the optimal downlink transmission beam of the base station are obtained. When a new random access arrives, in the process of performing step 701, the terminal informs the base station of the measured optimal downlink transmit beam of the base station by selecting a corresponding random access Occasion (RO), so in the step In 703, the base station sends a random access response (RAR) by using the best downlink transmit beam, where the RAR carries the indication information of the first transmit beam to indicate the best uplink transmission of the terminal in the uplink transmission process. Beam.

Step 704: Receive an RAR by using an optimal downlink receive beam, and obtain a first uplink transmit beam, and calculate an uplink transmit beam corresponding to the optimal downlink transmit beam as a second uplink transmit beam based on a beam reciprocity capability comparison table.

It has been mentioned in step 703 that, before the arrival of the new random access, the terminal has measured the best downlink receiving beam in the process of establishing downlink synchronization between the terminal and the base station, and in step 704, the terminal adopts the optimal downlink. The receiving beam receives the RAR sent by the base station, and obtains the first uplink transmitting beam by using the indication information carried in the RAR. At the same time, the uplink transmit beam corresponding to the best downlink receive beam is calculated as the second uplink transmit beam based on the beam reciprocity capability comparison table or the beam reciprocity capability learning model stored in the terminal. The second uplink transmit beam is the theoretical value of the best uplink transmit beam obtained by beam reciprocity capability.

Step 705: When the angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than a preset angle threshold, determine that the current state is indicating that the terminal does not have beam reciprocity capability.

In the 5G communication system, the multiple transmit and receive beams used by the base station and the terminal cover different spatial orientations, and each beam corresponds to a specific spatial angle. The first uplink transmit beam obtained in step 702 corresponds to a spatial angle of 1, step 704 Obtaining a second uplink transmit beam corresponding to a spatial angle 2, and when the angular difference between the spatial angle 1 and the spatial angle 2 is less than a preset angle threshold, the first uplink transmit beam and the second uplink transmit may be considered. The beam is the same transmit beam. It should be understood that the preset angle threshold is related to the accuracy of the measurement result. The smaller the preset angle threshold is, the higher the accuracy of the measurement result is. Specifically, when the preset angle threshold is used. When it is 0, the measurement result has the highest accuracy.

When the angle difference between the first uplink transmit beam and the second uplink transmit beam is less than a preset angle threshold, it indicates that the current optimal optimal uplink transmit beam is the same as the theoretical optimal uplink transmit beam obtained based on the initial beam reciprocity capability. A transmit beam indicates that the antenna array of the terminal at the current moment does not have a deviation, and the current state is determined to indicate that the terminal has the capability of beam reciprocity.

When the angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than the preset angle threshold, it indicates that the current optimal optimal uplink transmit beam and the theoretical optimal uplink transmit beam obtained based on the initial beam reciprocity capability are not With the same transmit beam, the current state is determined to indicate that the terminal does not have beam reciprocity capability.

It should be understood that the determination condition in step 705 can also be used to determine the scene in which the terminal has no beam reciprocity capability at the initial moment.

Another specific implementation of the step 402 provided by the embodiment of the present application is shown below, as shown in FIG. 8.

When the new random access arrives, perform the steps described below:

Step 801: Send a random access preamble to the base station according to the multiple uplink transmit beams.

In this specific solution, the initial state of the terminal is that there is no beam reciprocity capability. When the indication information reaches the preset condition, it is necessary to determine whether the current state of the terminal becomes capable of beam reciprocity. Since the terminal does not have the beam reciprocity capability, the terminal cannot know which uplink transmit beam can achieve the best connection with the base station, so the terminal transmits the random access preamble sequence preamble to the base station in each uplink transmit beam.

Step 802 is the same as step 702.

Step 803 is the same as step 703.

Step 804 is the same as step 704.

Step 805: When the first uplink transmit beam and the second uplink transmit beam are the same, determine that the current state is indicating that the terminal has beam reciprocity capability.

Specifically, the terminal labels all uplink transmit beams. When the first uplink transmit beam and the second uplink transmit beam have the same label, the terminal is considered to have beam reciprocity capability at the current time.

When the labels of the first uplink transmit beam and the second uplink transmit beam are different, it is considered that the two uplink transmit beams are different, and the current state of the terminal still does not have the beam reciprocity capability.

Optionally, the determining condition of step 705 is performed. When the angle difference between the first uplink transmit beam and the second uplink transmit beam is less than a preset angle threshold, the terminal at the current time is considered to have beam reciprocity capability.

Optionally, if there is partial beam reciprocability between the capability of not having beam reciprocity and having beam reciprocity, when the current state of the terminal is capable of partial beam reciprocity, the actual measurement The angle difference between the obtained first uplink transmit beam and the theoretical second uplink transmit beam is greater than a preset threshold value in step 705, but the angle difference is limited to a certain fixed range, so The threshold threshold is determined when the angle difference between the first uplink transmit beam and the second uplink transmit beam falls between the two threshold thresholds to determine that the current state of the terminal is partial beam reciprocity.

Step 403: Report the current status to the network.

If the current state indicates that the terminal does not have the beam reciprocity capability, but still uses and reports the beam reciprocity capability, the uplink transmit beam obtained based on the best downlink receive beam is not the best uplink transmit beam, and the wrong uplink transmission is used. The beam will cause the uplink transmit power of the terminal to increase, and even cause problems such as dropped calls, thereby affecting the communication quality between the base station and the terminal. Correspondingly, when the terminal actually has the beam reciprocity capability, it will not have the beam reciprocity capability. The report is sent to the base station, which causes the beam management process to be started during downlink and uplink transmission, which reduces the communication efficiency between the terminal and the base station. Therefore, when the indication information related to the beam reciprocity capability reaches a preset condition, the current state of the beam reciprocity capability is determined, and the current state is reported to the base station, so that the terminal can know whether the beam reciprocity capability is in time. Applicable status. In an optional solution, before the current state is reported to the network, it is determined whether the current state is the same as the historical state that was last reported to the network, and when the current state is different from the historical state, the current state is triggered. Reported to the network side of the operation. Optionally, when the historical status reported by the terminal to the network indicates that the terminal has the beam reciprocity capability, and the obtained current status indicates that the terminal does not have the beam reciprocity capability, triggering the operation of reporting the current status to the network, and The current status is reported to the network.

It should be understood that the 5G terminal communicates with the access network device by using a beam. Here, the base station is used as an example of the access network device. When the current state of the beam reciprocity capability is reported, it can be reported only to the base station side. In the case of the case, it may be further reported to the core network side.

For example, the terminal may report the current status of the beam reciprocity capability to the base station and the core network by using the UE capability query result after waiting for the base station to initiate the UE capability query. In another possible case, the terminal does not wait for the base station to initiate the UE capability query, and actively reports the current status to the base station. Since the UE does not attach the UE capability query process during the active reporting, the terminal does not report to the core network, but only reports to the base station. Just fine.

Based on such understanding, the network mentioned in step 403 may include a base station, and may optionally further include a core network device.

FIG. 9 is a specific method for reporting a current state of a beam reciprocity capability according to an embodiment of the present disclosure, where the method specifically includes:

Step 901: The terminal initiates de-attach detach to the network.

The method shown in FIG. 9 reports the current status of the beam reciprocity capability to the network by using the process of UE capability reporting and synchronization. The capability of the UE can be divided into the capability of the radio access associated with the base station and the capability related to the core network. Therefore, both the base station side and the core network side are involved in reporting the UE capability. When the terminal initiates the attach, the terminal reports the UE capability. After receiving the UE capability information, the base station indicates the UE capability to the MME through the UE Capability Information Indication (UE) message. To reduce the air interface cost, the MME saves the UE capability information, and indicates the capability to the base station when subsequently transmitting a context setup request message to the base station.

Since the UE is saved on the network after the terminal initiates the attach for the first time, the base station does not initiate the UE capability query to the terminal if the subsequent terminal does not initiate the associated operation such as detach detach. When the UE capability information of the terminal changes, in order to ensure the synchronization of the UE capability information, the MME needs to initiate the detachment detach to the network. In the detach process, the MME deletes the UE capability information saved locally.

Step 902: The terminal initiates attaching an attach to the network.

After the terminal initiates the detach detach, the terminal initiates the attaching attach. In the process of initiating the attach, the core network sends an initial context setting request message to the base station, where the message includes an attach accept indication to inform the base station that the attach is accepted, but since the MME will be saved in The local UE capability information is deleted, so the UE capability message is not included in the context setup request message.

Step 903: The base station does not receive the UE capability sent by the MME, and initiates a UE capability query request.

Since the MME sends the Context Setting Request message that does not include the UE capability information, and the network needs to know the UE capability when performing various event decisions or executing various algorithms, the base station initiates the UE capability query to the terminal through the downlink transmit beam ( UECapabilityEnquiry) request.

Step 904: The terminal starts the UE capability query according to the UE capability query request, and generates a UE capability query result.

Step 905: Report the UE capability query result to the base station.

Specifically, the UE capability query result is the terminal capability information UECapabilityInformation. In the uplink transmission process, the terminal uploads the terminal capability information to the base station by using an uplink transmit beam, where the UE capability information includes the current state of the beam reciprocity capability of the terminal. In a specific solution, a new field, BeamCorrespondenceCapability, may be added to the UECapabilityInformation, where the current state of the beam reciprocity capability of the terminal is included.

Step 906: The base station sends a UE capability information indication to the MME.

After receiving the UE capability information reported by the terminal, the base station sends a UE Capability Information Indication message to the MME, and the UE capability information is transmitted to the MME by using the message. Further, the UE capability information is included in the UE capability information. The current state of the beam reciprocity capability is saved by the MME. Before the terminal initiates detach next time, the network considers that the terminal always uses the beam reciprocity capability in this state.

The current state of the terminal beam reciprocity capability is reported to the network through the process of UE capability reporting and synchronization, so that the network can instruct the terminal to adjust the beam management process in time when the beam reciprocity capability of the terminal is in different states, and avoid the beam. An inappropriate transmit-receive beam is used in the communication. The reporting method needs to wait for the base station to initiate the UE capability query information before the reporting can be completed. The following describes a method for actively reporting the current state of the beam reciprocity capability.

FIG. 10 is another specific method for reporting a current state of a beam reciprocity capability according to an embodiment of the present disclosure, where the method specifically includes:

Step 1001: The terminal actively reports the UEBeamCorrespondenceCapabilityInd to the base station.

In the reporting method, the terminal does not need to wait for the base station to initiate the UE capability query, and may report the current state actively when the indicator information related to the beam reciprocity capability reaches the preset condition and the current state of the beam reciprocity capability is known. To the base station. Specifically, the terminal reporting the terminal beam reciprocity capability status indicates the UEBeamCorrespondenceCapabilityInd field to the base station, where the UEBeamCorrespondenceCapabilityInd field includes the current status of the terminal beam reciprocity capability.

After the base station receives the beam reciprocity capability of the terminal, the current state of the beam reciprocity is not the capability of the beam reciprocity, and the process of beam management between the base station and the terminal is adjusted in time. FIG. 11 is the terminal reporting beam provided by the embodiment of the present application. A specific beam management process following the current state of reciprocity capabilities. The process specifically includes:

Step 1101: The base station triggers the uplink beam scanning by using the DCI.

When the state of the terminal changes from the capability of beam reciprocity to the capability of no beam reciprocity, if the terminal is still considered to be in the state of beam reciprocity, the terminal may use an inappropriate transmit-receive beam pair, affecting the terminal. The quality of communication with the base station. Therefore, when receiving the report that the current state of the terminal is not the capability of the beam reciprocity, the base station notifies the terminal to perform the uplink beam scanning to select the best uplink transmit beam. Specifically, in the embodiment of the present application, the base station passes the downlink control. The information DCI triggers the terminal to perform uplink beam scanning.

Step 1102: The terminal selects the SRS resource indicated in the DCI to transmit different uplink transmit beams.

After receiving the indication that the base station triggers the uplink beam scanning, the terminal sends the different uplink transmit beams to the base station. Specifically, the terminal selects the Sounding Reference Signal (SRS) resource indicated in the DCI to complete the uplink transmit beam.

Step 1103: The base station measures different uplink transmit beams of the terminal, and selects an optimal uplink transmit beam.

Specifically, the base station receives, by each uplink receiving beam, a signal transmitted by each uplink transmitting beam of the terminal and performs measurement, and when the quality of the communication signal between the terminal and the base station is the best, the corresponding uplink transmitting beam is the optimal uplink of the terminal. Transmit beam. Refer to the description in step 703 for the measurement reference quantity on which the signal quality is judged.

Step 1104: The base station indicates the best uplink transmit beam to the terminal by using the SRI in the DCI.

The base station indicates the best uplink transmit beam to the terminal by using a Sounding Reference Signal Resource Index (SRI) in the DCI.

Step 1105: The terminal uses the best uplink transmit beam for uplink transmission.

Further, if the base station measures the quality of the best uplink transmit beam, the base station triggers the terminal to locally scan the adjacent beam of the optimal uplink transmit beam and selects a new optimal uplink transmit beam.

Exemplarily, the current state of the beam reciprocity capability reported by the terminal may be that the terminal has or does not have the beam reciprocity capability to indicate that the beam reciprocability capability changes to the network end. As described in step 401 in the previous embodiment, the terminal determines whether the indication information related to the beam reciprocity capability reaches a preset condition, which may be determined periodically or according to the number of random access failures. The periodic determination is determined based on the length of use of the beam reciprocity capability.

Optionally, if the terminal has no beam reciprocability capability and has beam reciprocity capability, the base station instructs the terminal to stop the uplink beam scanning process through the DCI, and obtains the best downlink receiving beam corresponding by the beam reciprocity capability. Good uplink transmit beam to improve beam selection efficiency.

Optionally, when the terminal changes from the beam reciprocity capability to the partial beam reciprocity capability, the base station uses the DCI to instruct the terminal to compensate according to the angle of the uplink transmit beam obtained by the partial beam reciprocity capability, so that the uplink is The angular difference between the transmit beam and the best upstream transmit beam is controlled within a predetermined threshold of step 705 above.

A terminal provided by the embodiment of the present application is provided below.

As shown in FIG. 12, the embodiment of the present application provides a terminal that has the capability of adaptively determining beam reciprocity, and the terminal 1200 includes:

The determining module 1201 is configured to determine whether the indication information related to the beam reciprocity capability reaches a preset condition. For details, refer to the description of step 401.

The determining module 1202 is configured to determine a current state of the beam reciprocity capability when the indication information reaches the preset condition. For details, refer to the description of step 402.

The reporting module 1203 is configured to report the current status to the network. For details, refer to the description in step 403. Specifically, the reporting module is configured to implement the operations of reporting the current state of the beam reciprocability capability to the base station and the MME in steps 905 and 906, and the operation of actively reporting the current state of the beam reciprocity capability in FIG.

Further, the determining module 1201 is configured to implement any one of the methods described in FIG. 5 and FIG. 6 to determine whether the indication information related to the beam reciprocity capability reaches a preset condition; the determining module 1202 is configured to implement FIG. 7 and Any of the methods described in Figure 8 for determining the current state of beam reciprocity capability.

The terminal 1200 can also include:

The query triggering module 1204 is configured to trigger the network to initiate the UE capability query, and specifically, to implement the operations in step 901 and step 902;

The generating module 1205 is configured to receive a UE capability query request initiated by the network, and generate a UE capability query result according to the query request, where the capability query result includes a current state of the beam reciprocity capability, specifically, to implement step 903. And the operation in step 904;

Optionally, the terminal 1200 may further include:

The reporting triggering module 1206 is configured to determine whether the current state of the beam reciprocity capability is the same as the historical state reported to the network last time. When the current state is different from the previous historical state, the operation of reporting the current state to the network is triggered.

For the possible physical form of the terminal, please refer to the description of the terminal 30 in the specification.

Each component module of the above terminal may be implemented by using hardware, a software functional unit, or a combination of the two. When implemented in hardware, at least one of the modules can be a logic module formed by a logic integrated circuit, which can include a transistor, a logic gate, or a circuit function module.

The device embodiments provided in the present application are only schematic, and the cell division in FIG. 12 is only a logical function division, and may be further divided in actual implementation. For example, multiple modules may be combined or may be integrated into another system. The coupling of the various modules to one another may be through some interfaces, which are typically electrical communication interfaces, but may not exclude mechanical interfaces or other form interfaces. Thus, the modules described as separate components may or may not be physically separate, and may be located in one location or in different locations on the same or different devices.

A terminal in the embodiment of the present application is described above from the perspective of a modular functional entity. The terminal provided in the embodiment of the present application is described below with reference to the terminal 30 shown in FIG. The communication processor 3010 in the terminal 30 is configured to perform some or all of the functions of any of the methods described above. The specific type of the communication processor 3010 can be referred to the description of the processor 301 in the terminal 30. The memory 302 is used to store related instructions. When the related instructions are run on a computer or a processor, any method provided by the embodiment of the present application may be implemented. The type of the memory may refer to the description of the memory 302 in the terminal 30. The transceiver 303 includes a transmitter Tx. When the current state is different from the initial state, the transmitter is used to report the current state to the network by the instruction or the driver of the processor 301. For details, refer to the description of step 403. In some possible embodiments, the transmitter Tx may be a separate transmitter. In some possible embodiments, there may be only one transmitter or multiple transmitters in the transceiver. The transceiver 303 also includes a receiver Rx that can be used to receive relevant data and signaling transmitted by the base station and transmit it to the processor 301 for processing. In some possible embodiments, the receiver Rx can be a separate receiver. In some feasible embodiments, there may be only one receiver or multiple receivers in the transceiver.

The output device 304, the input device 305, the antenna 31, and the connector have been described in detail in the description of FIG. 2, and details are not described herein again. The embodiment of the present application further provides a communication system 100, which includes a base station and a terminal 30. The base station can be referred to the description of the access network device 20 in FIG. 2; the terminal 30 is configured to perform the steps performed by the terminal in any of the above method embodiments. For the process of the interaction between the base station and the terminal, refer to the description in the foregoing method embodiment, and details are not described herein again.

The embodiment of the present application also provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform one or more of the steps described above. The constituent modules of the above signal processing device may be stored in the computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.

Based on the understanding, the embodiment of the present application further provides a computer program product including instructions, and the technical solution of the present application may contribute to the prior art or all or part of the technical solution may be a software product. The computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor therein to perform various embodiments of the present application. All or part of the steps of the method. Please refer to the relevant description of the memory 302 for the kind of the storage medium.

The above-mentioned embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still implement the foregoing embodiments. The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present application. For example, some specific operations in the device embodiments may refer to the previous method embodiments.

Claims

A method of communication, the method comprising:

Determining whether the indication information related to the beam reciprocity capability reaches a preset condition;

Determining a current state of the beam reciprocity capability when the indication information reaches the preset condition, the beam reciprocity capability indicating a transmit beam used by the current device for signal transmission in beamforming and Corresponding relationship between received beams received by the signal, the current state being used to indicate whether the current device has the beam reciprocity capability when communicating with the network based on the beamforming;

The current status is reported to the network.
The method according to claim 1, wherein the indication information is a duration of use of the beam reciprocity capability, and the corresponding preset condition is a usage duration threshold of the beam reciprocity capability.
The method according to claim 1, wherein the indication information is a number of times the random access failure is initiated based on the beam reciprocity capability, and the corresponding preset condition is the number of random access failures. Threshold.
The method according to any one of claims 1 to 3, wherein the determining the current state of the beam reciprocity capability comprises:

Transmitting a preamble sequence preamble for random access to the network by using multiple uplink transmit beams;

Obtaining, by the network end, a first uplink transmit beam, where the first uplink transmit beam is an optimal uplink transmit beam of the plurality of uplink transmit beams measured by the network end;

Calculating, according to the beam reciprocity capability, a second uplink transmit beam corresponding to an optimal downlink receive beam of the multiple downlink receive beams;

Determining, by the current state, that the current device does not have the beam reciprocity capability, when an angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than an angle threshold;

And determining, when the angle difference between the first uplink transmit beam and the second uplink transmit beam is not greater than the angle threshold, determining that the current device has the beam reciprocability capability.
The method according to any one of claims 1 to 3, wherein the determining the current state of the beam reciprocity capability comprises:

Transmitting a preamble sequence preamble for random access to the network by using multiple uplink transmit beams;

Obtaining, by the network end, a first uplink transmit beam, where the first uplink transmit beam is an optimal uplink transmit beam of the plurality of uplink transmit beams measured by the network end;

Calculating, according to the beam reciprocity capability, a second uplink transmit beam corresponding to an optimal downlink receive beam of the plurality of downlink receive beams;

When the first uplink transmit beam is different from the second uplink transmit beam, determining that the current state is to indicate that the current device does not have the beam reciprocity capability;

And when the first uplink transmit beam is the same as the second uplink transmit beam, determining that the current state is to indicate that the current device has the beam reciprocity capability.
The method according to claim 4 or 5, wherein the obtaining the first uplink transmit beam indicated by the network comprises: receiving a random access response RAR from the network, by using an indication in the RAR Information obtains the first uplink transmit beam.
The method according to any one of claims 1 to 6, wherein the method further comprises:

Receiving a capability query indication initiated by the network, generating a capability query result based on the capability query indication, where the capability query result includes the current state;

The reporting the current status to the network includes: reporting the capability query result to the network.
The method according to claim 7, wherein the method further comprises: before receiving the capability query indication initiated by the network, the method further comprising:

Detach from the network side;

Attaching an attach to the network to trigger the network to initiate the capability query indication.
The method according to any one of claims 1-6, wherein the reporting the current status to the network comprises:

The beam reciprocity capability field is actively reported to the network, and the beam reciprocity capability field includes the current state.
The method according to any one of claims 1 to 9, wherein before the reporting the current state to the network, the method further comprises:

Determining whether the current state is the same as a historical state that was last reported to the network end;

When the current state is different from the historical state, an operation of reporting the current state to the network is triggered.
A terminal, the terminal comprising:

a determining module, configured to determine whether the indication information related to the beam reciprocity capability reaches a preset condition;

a determining module, configured to determine a current state of the beam reciprocity capability when the indication information reaches the preset condition, where the beam reciprocity capability indicates that the terminal is used for signal transmission in beamforming Corresponding relationship between a transmit beam and a receive beam for signal reception, the current state being used to indicate whether the terminal has the beam reciprocity capability when communicating with the network based on the beamforming;

The reporting module is configured to report the current status to the network.
The terminal according to claim 11, wherein the indication information is a usage duration of the beam reciprocity capability, and the corresponding preset condition is a usage duration threshold of the beam reciprocity capability.
The terminal according to claim 11, wherein the indication information is a number of times the random access failure is initiated based on the beam reciprocity capability, and the corresponding preset condition is the number of random access failures. Threshold.
The terminal according to any one of claims 11 to 13, wherein the determining module is specifically configured to:

Transmitting a preamble sequence preamble for random access to the network by using multiple uplink transmit beams;

Obtaining, by the network end, a first uplink transmit beam, where the first uplink transmit beam is an optimal uplink transmit beam of the plurality of uplink transmit beams measured by the network end;

Calculating, according to the beam reciprocity capability, a second uplink transmit beam corresponding to an optimal downlink receive beam of the multiple downlink receive beams;

When the angle difference between the first uplink transmit beam and the second uplink transmit beam is greater than an angle threshold, determining that the current state is indicating that the terminal does not have the beam reciprocity capability;

And when the angle difference between the first uplink transmit beam and the second uplink transmit beam is not greater than the angle threshold, determining that the current state is to indicate that the terminal has the beam reciprocity capability.
The terminal according to any one of claims 11 to 13, wherein the determining module is specifically configured to:

Transmitting a preamble sequence preamble for random access to the network by using multiple uplink transmit beams;

Obtaining, by the network end, a first uplink transmit beam, where the first uplink transmit beam is an optimal uplink transmit beam of the plurality of uplink transmit beams measured by the network end;

Calculating, according to the beam reciprocity capability, a second uplink transmit beam corresponding to an optimal downlink receive beam of the plurality of downlink receive beams;

When the first uplink transmit beam is different from the second uplink transmit beam, determining that the current state is indicating that the terminal does not have the beam reciprocity capability;

And when the first uplink transmit beam is the same as the second uplink transmit beam, determining that the current state is to indicate that the terminal has the beam reciprocity capability.
The terminal according to claim 14 or 15, wherein the determining module is specifically configured to: receive a random access response RAR from the network, and obtain the first uplink transmission by using indication information in the RAR Beam.
The terminal according to any one of claims 11 to 16, further comprising: a generating module, configured to receive a capability query indication initiated by the network, and generate a capability query result based on the capability query indication, The capability query result includes the current state;

The reporting module is specifically configured to report the capability query result to the network.
The terminal according to claim 17, further comprising: a query triggering module, configured to:

Detach from the network side;

Attaching an attach to the network to trigger the network to initiate the capability query indication.
The terminal according to any one of claims 11 to 16, wherein the reporting module is specifically configured to:

The beam reciprocity capability field is actively reported to the network, and the beam reciprocity capability field includes the current state.
The terminal according to any one of claims 11 to 19, further comprising: a reporting triggering module, configured to:

Determining whether the current state is the same as a historical state reported to the network last time;

When the current state is different from the historical state, an operation of reporting the current state to the network is triggered.