WO2024061165A1

WO2024061165A1 - Communication method and communication apparatus

Info

Publication number: WO2024061165A1
Application number: PCT/CN2023/119417
Authority: WO
Inventors: 邓云
Original assignee: 展讯通信（上海）有限公司
Priority date: 2022-09-21
Filing date: 2023-09-18
Publication date: 2024-03-28
Also published as: CN117793855A

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: when it is detected that a beam failure occurs in a first cell, sending first indication information or accessing a first neighboring cell of the first cell, wherein the first neighboring cell is a neighboring cell having an available beam; the first indication information is used for indicating at least one cell having an available beam, and the at least one cell comprises the first cell and/or at least one neighboring cell of the first cell; and the available beam is a beam having the signal quality greater than or equal to a threshold. The present application can improve the communication efficiency and ensure the communication quality.

Description

Communication method and communication device

Technical field

The present application relates to the field of communication technology, and in particular, to a communication method and communication device.

Background technique

In a beam-based communication system, the quality of the beam will be affected due to the movement of environmental objects around the terminal device or the rotation and occlusion of the terminal device itself. The decline in beam quality will directly lead to a decline in the communication quality between terminal equipment and network equipment. Therefore, in order to deal with this phenomenon of beam failure, the new radio (new radio, NR) system introduces the beam failure recovery (BFR) mechanism. In the existing BFR mechanism, when the terminal device detects the failure of a beam in the serving cell, it immediately checks the availability of other beams in the serving cell. If there is no available beam in the serving cell, it continues to wait, which extremely affects communication efficiency and communication quality. .

Contents of the invention

Embodiments of the present application provide a communication method and communication device, which can select a beam with a relatively good signal quality for terminal equipment to access a cell, thereby improving communication efficiency and communication quality.

In a first aspect, an embodiment of the present application provides a communication method, the method comprising:

When it is detected that a beam failure occurs in the first cell, send first indication information or access a first neighboring cell of the first cell, where the first neighboring cell is a neighboring cell with an available beam;

The first indication information is used to indicate at least one cell having an available beam, where the at least one cell includes the first cell and/or at least one neighboring cell of the first cell;

The available beams are beams whose signal quality is greater than or equal to the threshold value;

Based on the description of the first aspect, when it is detected that a beam failure occurs in the serving cell of the terminal device (ie, the first cell), the first indication information may be used to indicate the first cell and/or at least one neighbor of the first cell that has an available beam. Cell, which facilitates network equipment to select a cell with better beam signal quality (which can be the first cell or a neighboring cell) for terminal equipment to access, thereby improving communication efficiency and ensuring communication quality. The terminal device can also directly select a neighboring cell with available beams to access, without having to wait for the beam recovery of the serving cell, thereby improving communication efficiency and ensuring communication quality.

In an optional implementation, the first indication information is also used to indicate beam information of available beams of each cell in the at least one cell.

Through this embodiment, the first indication information further indicates the beam information of the available beams of each cell in at least one cell with available beams, thereby providing a reference for the network device to select a cell and facilitating the selection of a beam with better signal quality and/or available beams. Access to a larger number of cells ensures communication quality.

In an optional implementation, the beam information of the available beams of each cell includes at least one of the following: the beam identifier of the available beams of each cell, the signal quality measurement result of the available beams of each cell, The ranking information of the signal quality measurement results of the available beams of each cell.

Through this implementation, the terminal device reports specific beam information to the network device, which facilitates the network device to select a cell with relatively good beam signal quality for the terminal device to access based on the beam information.

In an optional implementation, the first indication information is carried in the beam failure recovery BFR media access control MAC control element CE.

Through this implementation, carrying the first indication information in the BFR MAC CE can avoid the signaling overhead caused by separately transmitting the first indication information.

In an optional implementation, sending the first indication information includes:

When it is determined that the first cell has an available beam, random access is initiated on the random access channel opportunity RO resource corresponding to the available beam of the first cell, during the random access process or in the The first indication information is sent after the random access is completed.

Through this implementation, by transmitting the first indication information in the random access process initiated on the RO resource corresponding to the available beam of the first cell, the signaling overhead caused by separately transmitting the first indication information can be avoided, and is consistent with the current situation. There are systems that are compatible. Sending the first indication information after the random access is completed can ensure the success rate of sending the first indication information.

In an optional implementation, the first cell is a primary cell in a primary cell group; and the sending of the first indication information includes:

The first indication information is sent through the secondary cells in the primary cell group. This method can satisfy the transmission of the first indication information in the carrier aggregation scenario;

Alternatively, if there are available transmission resources on the uplink carrier of the primary cell, the transmission resources are used to send the first indication information. This method can fully utilize the available transmission resources of the uplink carrier;

Alternatively, the first indication information is sent to the secondary network device. This method can satisfy the transmission of the first indication information in a dual connectivity scenario.

In an optional implementation, the first cell is a primary and secondary cell in a secondary cell group; and the sending of the first indication information includes:

Send the first indication information through the secondary cells in the secondary cell group;

Or, if there are available transmission resources on the uplink carrier of the primary and secondary cells, use the transmission resources to send the first indication information;

Or, send the first indication information to the main network device.

Through this implementation, the transmission of the first indication information in the dual connectivity scenario can be satisfied, and beam failure recovery when the primary and secondary cell beams fail in the dual connectivity scenario.

In an optional implementation, after sending the first indication information, the method further includes:

Receive a handover command, the handover command including second indication information, the second indication information being used to instruct handover to the target cell in the at least one neighboring cell;

Handover to the target cell according to the second indication information.

Through this implementation, the network device can instruct the terminal device to access the neighboring cell, thereby restoring the communication of the terminal device as soon as possible and avoiding the problem of low communication efficiency caused by continuing to wait in the first cell.

In an optional implementation, the handover command further includes third indication information, the third indication information being used to indicate whether to retain the configuration information of the first cell and/or the configuration information of the at least one neighboring cell. Configuration information of other neighboring cells except the target cell;

The method also includes:

According to the third indication information, the configuration information of the first cell and/or the configuration information of other neighboring cells among the at least one neighboring cell except the target cell is processed.

Through this implementation, the network device can further indicate whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells through the third indication information, thereby indirectly instructing the terminal device to subsequently adopt low-layer handover or RRC handover, which facilitates the network device to Control the switching mode of the terminal device.

In an optional implementation, the configuration information includes at least one of the following: a reference signal to be measured, channel state information to be reported, and channel resource information for reporting the channel state information.

In an optional implementation, the access to the first neighboring cell of the first cell includes:

Random access is initiated on the RO resource corresponding to the available beam of the first neighboring cell to access the first neighboring cell.

Through this implementation, random access is performed on the RO resources corresponding to the available beams of the first neighboring cell to improve access efficiency, thereby improving communication efficiency.

In an optional implementation, the identification of the terminal device and/or the fourth indication information are sent to the network device through the random access process;

Wherein, the fourth indication information is used to indicate the beam information of available beams of the first neighboring cell and/or the beam information of at least one neighboring cell of the first cell except the accessed first neighboring cell. Beam information of available beams of other neighboring cells.

Through this implementation, the beam information of the available beams of the first neighboring cell and/or the beam information of the available beams of other neighboring cells is reported to the network device, providing a reference for the network device to subsequently use the beam or switch cells.

In an optional implementation, the neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is a handover triggered by signaling at the physical layer or MAC layer.

By implementing this method, the candidate cells for low-layer handover configured by the network device can be fully utilized to determine neighboring cells with available beams, and additional configuration of candidate cells can be avoided.

In a second aspect, embodiments of the present application provide a communication method, which method includes:

receiving first indication information, where the first indication information is used to indicate at least one cell having an available beam, where the at least one cell includes a first cell and/or at least one neighboring cell of the first cell, where the first cell is a cell where a beam failure occurs, and where the available beam is a beam having a signal quality greater than or equal to a threshold value;

According to the first indication information, it is determined that the terminal equipment continues to access the first cell or access the target cell in the at least one neighboring cell.

Based on the description of the second aspect, when it is detected that a beam failure occurs in the serving cell of the terminal device (ie, the first cell), the first indication information may be used to indicate the first cell and/or at least one neighbor of the first cell that has an available beam. Cell, which facilitates network equipment to select a cell with better beam signal quality (which can be the first cell or a neighboring cell) for terminal equipment to access, thereby improving communication efficiency and ensuring communication quality.

In an optional implementation, the neighboring cell is a candidate cell for low-layer handover, and the low-layer handover is a handover triggered by signaling at the physical layer or MAC layer.

In an optional implementation, the method further includes:

When it is determined that the terminal equipment has accessed the target cell, a handover command is sent, where the handover command includes second indication information, and the second indication information is used to instruct handover to the at least one neighboring cell. Target neighborhood.

In an optional implementation, the handover command further includes third indication information, the third indication information being used to indicate whether to retain the configuration information of the first cell and/or the configuration information of the at least one neighboring cell. Configuration information of other neighboring cells except the target cell.

In an optional implementation, the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for reporting channel status information.

In a third aspect, embodiments of the present application provide a communication method, which method includes:

Determine that the terminal equipment switches from the first cell to a first neighboring cell of the first cell, the first cell is a cell where beam failure occurs, the first neighboring cell is a neighboring cell with an available beam, and the available beam It is a beam whose signal quality is greater than or equal to the threshold value;

Communicate with the terminal device through the first neighboring cell.

Based on the description of the third aspect, the terminal device can directly select a neighboring cell with an available beam to access, without continuing to wait for the beam recovery of the serving cell, thereby improving communication efficiency and ensuring communication quality.

In an optional implementation, the determining that the terminal equipment switches from the first cell to the first neighboring cell of the first cell includes:

If the identification of the terminal device is received during the random access process of the first neighboring cell, it is determined that the terminal device is switched from the first cell to the first neighboring cell.

In an optional implementation, if the random access process is a four-step random access, the identity of the terminal device is carried in MSG3;

If the random access process is a two-step random access, the identity of the terminal device is carried in the MSGA.

In an optional implementation, communicating with the terminal device through the first neighboring cell includes:

Candidate cell information is sent to the terminal device through the first neighboring cell, where the candidate cell information is used to indicate a candidate cell associated with the first neighboring cell for low-layer handover, and/or for low-layer handover. configuration information of the candidate cell, and the lower layer switches to pass Handover triggered by physical layer or MAC layer signaling.

In a fourth aspect, embodiments of the present application provide a communication method, which method includes:

Receive a handover command, where the handover command includes second indication information and third indication information. The second indication information is used to instruct handover to a target cell in at least one neighboring cell of the first cell; the third indication information is used Instructing whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell;

Handover from the first cell to the target cell according to the second indication information;

According to the third indication information, the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell are processed.

Based on the description of the fourth aspect, the network device not only indicates the target cell to which the terminal device needs to switch, but also indicates whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells, thereby indirectly controlling the subsequent handover method of the terminal device. instruct.

In an optional implementation, the at least one neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is a handover triggered by physical layer or MAC layer signaling.

In a fifth aspect, embodiments of the present application provide a communication method, which method includes:

Determining that the terminal equipment switches from the first cell to a target cell, where the target cell is a cell in at least one neighboring cell of the first cell;

Send a switching command, where the switching command includes second indication information and third indication information, the second indication information is used to indicate switching to the target cell; the third indication information is used to indicate whether to retain the first Configuration information of the cell and/or configuration information of other neighboring cells in the at least one neighboring cell except the target cell.

In a sixth aspect, embodiments of the present application provide a communication device. The communication device includes a processor and a memory. The processor and the memory are connected to each other. The memory is used to store a computer program. The computer program includes program instructions. The processor is configured to Call the program instructions to perform the method described in the first aspect or any optional implementation manner of the first aspect, or to perform the method described in the second aspect or any optional implementation manner of the second aspect, Alternatively, perform the method as described in the third aspect or any optional implementation manner of the third aspect, or perform the method as described in the fourth aspect or any optional implementation manner of the fourth aspect, or perform as The method described in the fifth aspect or any optional implementation manner of the fifth aspect.

In the seventh aspect, embodiments of the present application provide a chip. The chip includes a processor and an interface. The processor and the interface are coupled; the interface is used to connect Receive or output a signal, and the processor is used to execute code instructions to perform the method described in the first aspect or any optional implementation of the first aspect, or to perform the method described in the second aspect or any optional implementation of the second aspect. The method described in the embodiment, or performing the method described in the third aspect or any optional embodiment of the third aspect, or performing the method described in the fourth aspect or any optional embodiment of the fourth aspect The method, or perform the method as described in the fifth aspect or any optional implementation manner of the fifth aspect.

In an eighth aspect, embodiments of the present application provide a module device, characterized in that the module device includes a communication module, a power module, a storage module and a chip module, wherein: the power module is used for The module device provides electrical energy; the storage module is used to store data and/or instructions; the communication module communicates with external devices; the chip module is used to call the data and/or instructions stored in the storage module, combined with the communication module , perform the method described in the first aspect or any optional implementation manner of the first aspect, or perform the method described in the second aspect or any optional implementation manner of the second aspect, or perform the method described in the second aspect or any optional implementation manner of the second aspect. The method described in the third aspect or any optional implementation manner of the third aspect, or performing the method described in the fourth aspect or any optional implementation manner of the fourth aspect, or performing the method described in the fifth aspect or any optional implementation manner of the fourth aspect. The method described in any optional embodiment of the five aspects.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. The computer program includes program instructions. When the electronic device executes the program instructions, to implement the following: The method described in the first aspect or any optional implementation manner of the first aspect, or performing the method described in the second aspect or any optional implementation manner of the second aspect, or performing the method described in the third aspect or The method described in any optional implementation manner of the third aspect, or performing the method described in the fourth aspect or any optional implementation manner of the fourth aspect, or performing the method described in the fifth aspect or any optional implementation manner of the fifth aspect. The method described in an optional embodiment.

Description of the drawings

Figure 1a is a schematic structural diagram of a communication system provided by an embodiment of the present application;

Figure 1b is a schematic structural diagram of another communication system provided by an embodiment of the present application;

Figure 1c is a schematic diagram of a low-layer switching provided by an embodiment of the present application;

Figure 2 is a schematic flow chart of a communication method provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of a BFR MAC CE provided by the embodiment of the present application;

Figure 4 is a schematic flowchart of another communication method provided by an embodiment of the present application;

Figure 5 is a schematic flowchart of yet another communication method provided by an embodiment of the present application;

Figure 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG8 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a module device provided in an embodiment of the present application.

Detailed ways

In the embodiment of this application, unless otherwise specified, the character "/" indicates that the related objects are an or relationship. For example, A/B can mean A or B. "And/or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

It should be pointed out that the words "first", "second" and other words involved in the embodiments of this application are only used for differentiation and description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. The quantities are not to be construed as indicating or implying an order.

In the embodiments of this application, "at least one" refers to one or more, and "multiple" refers to two or more. In addition, "at least one of the following" or similar expressions thereof refers to any combination of these items, which may include any combination of a single item (items) or a plurality of items (items). For example, at least one item (item) of A, B or C can represent: A, B, C, A and B, A and C, B and C, or A, B and C. Among them, each of A, B, and C can itself be an element, or it can be a set containing one or more elements.

In the embodiments of this application, "exemplary", "in some embodiments", "in another embodiment", etc. are used to express examples, illustrations or explanations. Any embodiment or design described herein as "example" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present a concept in a concrete way.

In the embodiments of the present application, "of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. In the embodiments of the present application, communication and transmission can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. For example, transmission can include sending and/or receiving, which can be a noun or a verb.

The equals involved in the embodiments of this application can be used in conjunction with greater than, and are applicable to the technical solution adopted when it is greater than, and can also be used in conjunction with less than, and are applicable to the technical solution adopted when it is less than. It should be noted that when equal is used with greater than, it cannot be used with less than; when equal to is used with less than, it is not used with greater than.

Some terms involved in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

1. Terminal equipment. In the embodiment of the present application, the terminal device is a device with wireless transceiver function, which can be called a terminal (terminal), user equipment (UE), mobile station (MS), or mobile terminal (mobile terminal). MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. . Terminal equipment can be fixed or mobile. It should be noted that the terminal device may support at least one wireless communication technology, such as long term evolution (long term evolution, LTE), new radio (new radio, NR), etc. For example, the terminal device may be a mobile phone (mobile phone), tablet computer (pad), desktop computer, notebook computer, all-in-one computer, vehicle-mounted terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation security Wireless in (transportation safety) Terminal, wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (wireless local loop) , WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, wearable device, terminal device in future mobile communication network or in the future Terminal equipment in the evolved public land mobile network (PLMN), etc. In some embodiments of the present application, the terminal device may also be a device with transceiver functions, such as a chip system. Among them, the chip system may include chips and may also include other discrete devices.

2. Network equipment. In the embodiment of this application, the network device is a device that provides wireless communication functions for terminal devices, and may also be called access network equipment, radio access network (radio access network, RAN) equipment, etc. The network device may support at least one wireless communication technology, such as LTE, NR, etc. Examples of network equipment include but are not limited to: next generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), wireless network control in the fifth generation mobile communication system (5th-generation, 5G) Radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved node B, Or home node B (HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc. The network device can also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device can They are relay stations, access points, vehicle-mounted equipment, terminal equipment, wearable devices, and network equipment in future mobile communications or network equipment in future evolved PLMNs. In some embodiments, the network device may also be a device with a wireless communication function for the terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

Please refer to Figure 1a, which is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system may include but is not limited to one or more network devices and one or more terminal devices. Figure 1a takes a network device 101 and a terminal device 102 as an example. The network device 101 in Figure 1a is a base station. For example, the terminal device 102 takes a mobile phone as an example. The terminal device 102 can establish a wireless link with the network device 101 to communicate. The communication system shown in Figure 1a includes but is not limited to network equipment and terminal equipment, and may also include other communication equipment. The number and form of equipment shown in Figure 1a are for example only and do not constitute a limitation on the embodiments of the present application.

Please refer to Figure 1b, which is a schematic structural diagram of another communication system provided by an embodiment of the present application. In the communication system shown in Figure 1b, the terminal device can be in a dual connection state, that is, the terminal device can maintain connections with the primary network device and the secondary network device at the same time. It can be understood that the main network device and the auxiliary network device may use the same wireless communication technology, or may use different wireless communication technologies, which is not limited in this application. For example, one of the primary network device and the secondary network device may be a 4G base station, and the other may be a 5G base station, that is, Evolved Universal Terrestrial Radio Access and New Radio Dual Connection (EUTRA-NR Dual Connection, EN-DC). For example, the main network equipment and the auxiliary network equipment may all be 5G base stations, that is, multiple wireless technology dual connectivity (Multi-Radio Dual Connectivity, MR-DC) or NR-DC.

Multiple cells under the main network device form a Master Cell Group (MCG), and multiple cells under the auxiliary network device form a Secondary Cell Group (SCG). For MCG, similar to ordinary carrier aggregation, the primary cell is also called Pcell (Primary cell), and the secondary cell is called Scell (Secondary cell). MCG can include one PCell and 0, 1, or multiple SCells. For SCG, the primary cell is called PSCell (Primary Secondary cell), and the remaining ordinary secondary cells are still called secondary cells SCell. SCG can include one PSCell and 0, 1, or multiple SCells.

Before describing the communication method of this application, the concepts involved in this application are first explained:

1. Low-level switching

Low-layer switching is a switching triggered by signaling at the Medium Access Control (MAC) layer or physical layer. This low-layer handover is relative to the handover triggered by signaling at the Radio Resource Control (RRC) layer. It can be understood that low-layer switching is just a proxy, and it can also be any other name, such as layer 1/layer 2 switching, L1/L2 switching, which is not limited in this application.

In low-layer handover, the network will configure one or more candidate cells for the terminal device. The one or more candidate cells may be neighboring cells of the serving cell serving the terminal device. Furthermore, the network may also configure corresponding cells for each candidate cell. Configuration information, which includes but is not limited to at least one of the following: the candidate cell requires a reference signal measured by the terminal equipment, such as a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) or synchronization signal block, which requires a terminal The channel status information reported by the device, such as the reference signal receiving power (RSRP) of the candidate cell measured by the physical layer, the channel quality indication (Channel Quality Indication, CQI), and at least one other item. The RSRP of the candidate cell measured by the physical layer may be called L1 RSRP. It is understandable that the network will also configure the terminal equipment to measure the serving cell and report the channel status information of the serving cell. It can be understood that in a handover triggered by signaling at the RRC layer, the network device does not need to configure candidate cells and the configuration information of each candidate cell to the terminal device in advance, and the terminal device does not need to report the L1RSRP or CQI corresponding to the candidate cell.

In some implementations, one or more candidate cells for network configuration may share configuration parameters of the Packet Data Convergence Protocol (PDCP) layer and/or the Radio Link Control layer (Radio Link Control, RLC), that is, During the low-layer handover process, the PDCP layer and/or RLC layer of the data radio bearer established by the terminal device may remain unchanged.

Correspondingly, the terminal device can perform physical layer measurements on the serving cell and candidate cells according to the configuration information, and report the L1 measurement results (which may also be called physical layer measurement results) of the serving cell and/or candidate cells to the serving cell. After the network obtains the measurement results, it makes a decision whether to switch. When it is determined that the terminal device is to be switched to a certain candidate cell, the terminal device may be triggered to switch to the candidate cell through MAC layer or physical layer signaling.

The following is an example of low-layer switching based on Figure 1c. Network equipment can be implemented in different ways. It can be an independent node to realize all functions of the network equipment, or it can be divided into a control unit (Central Unit, CU) and a distributed unit (CU). Distributed Unit (DU) two parts. One CU can connect to multiple DUs. Usually the CU handles RRC signaling, while the DU handles layer 1 (physical layer) and layer 2 (MAC layer) signaling and data. Figure 1c takes the network device including CU and DU as an example, where the serving DU can be understood as the DU corresponding to the serving cell, and the candidate DU can be understood as the DU corresponding to the candidate cell:

First, the configuration of the candidate cell based on low-layer inter-cell mobility is to configure the configuration information of the serving cell and the candidate cell for the UE. For details of the configuration information, please refer to the description of the foregoing embodiments, which will not be described again here. Then, the UE performs physical layer measurements based on the configuration information, obtains a low-layer measurement report, and reports it to the network. The network makes serving cell change decisions based on measurement reports (optionally, it can be combined with low-layer measurement reports and layer 3 measurement reports). Specifically, it can trigger the execution of serving cell changes based on low-layer signaling. The low-layer signaling can include the physical layer or the MAC layer. signaling.

Correspondingly, the switching command used to trigger low-layer switching in this application may also be called a low-layer switching command, and the name is not limited in this application.

2. Correspondence between beams, reference signals and random access channel opportunity (RACH Occasion, RO) resources

An NR cell is usually composed of multiple beams. The network equipment achieves complete coverage in an area through beam scanning. A cell can be composed of up to 64 beams. The terminal equipment can identify different beams through the reference signals sent by the cell, that is, there is a corresponding relationship between the reference signals and the beams. The signal quality of the beam can be determined by the signal quality of the corresponding reference signal. Taking the reference signal as the synchronization signal block SSB as an example, if there is a corresponding relationship between SSB1 and beam 1, and the terminal device detects that the signal quality (such as RSRP) of SSB1 sent by the network device is greater than or equal to the threshold value, it determines that the SSB1 The corresponding beam 1 is the available beam.

As an example, the reference signal can be a Synchronization Signal Block (SSB), that is, different beams are identified through different SSBs, and there is a corresponding relationship between SSBs and beams; as another example, the reference signal can be CSI- RS, that is, different beams are identified through different CSI-RS, and there is a corresponding relationship between CSI-RS and beams.

Furthermore, there is also a corresponding relationship between the reference signal (such as SSB) and the random access channel opportunity (RACH Occasion, RO) resource. In other words, there is also a corresponding relationship between the beam and the random access channel opportunity (RACH Occasion, RO) resource. For example, it can be a 1-to-1 mapping relationship or a many-to-1 mapping relationship. The specific mapping relationship is configured by the serving cell. Such as configured through system messages. The terminal device may initiate random access to the network device on the RO resource corresponding to the determined available beam, for example, send a message in the random access process on the RO resource.

As shown in Figure 2, it is a schematic flow chart of an embodiment of the communication method provided by this application. As shown in Figure 2, the method may include but is not limited to the following steps:

101. When detecting that beam failure occurs in the first cell, the terminal device sends first indication information, the first indication information being used to indicate at least one cell with available beams, and the at least one cell includes the first cell and /Or at least one neighboring cell of the first cell, the available beam is a beam whose signal quality is greater than or equal to a threshold value. Correspondingly, the network device receives the first indication information.

In one implementation, if the terminal device only accesses the serving cell PCell, the first cell may refer to the serving cell PCell serving the terminal device. In one implementation, if the terminal device is in a carrier aggregation scenario, the cell serving the terminal device may include the primary cell PCell and the secondary cell SCell, and the first cell may refer to the primary cell PCell. In one implementation, if the terminal device is in a dual connectivity scenario, the cells serving the terminal device may include the primary cell PCell and the secondary cell SCell in the MCG, and the primary and secondary cells PSCell and the secondary cell SCell in the SCG. The first cell in the embodiment of the present application may refer to the primary cell PCell in the MCG, or the first cell may also refer to the primary and secondary cell PSCell in the SCG. In the above-mentioned carrier aggregation scenario or dual connectivity scenario, the first cell where beam failure occurs may also be the secondary cell SCell. If it is in a dual connectivity scenario, the first cell may be the secondary cell SCell in the SCG, or it may refer to the secondary cell SCell in the MCG, which is not limited in this application.

For the first cell, the network may configure a reference signal for detecting beam failure for the terminal device. When the terminal device detects that the signal quality of the reference signal of the first cell meets the beam failure condition, it is determined that beam failure occurs in the first cell. The mechanism for determining beam failure may adopt an existing mechanism, which is not described in detail in this article.

In some embodiments, if the first cell is jointly covered by multiple network devices associated with the terminal device, the multiple network devices are respectively configured with reference signals for detecting beam failure. In a possible implementation, when the terminal device detects that the signal quality of the reference signal sent by a network device for detecting beam failure meets the beam failure condition, it is determined that beam failure occurs in the first cell. In another possible implementation, when the terminal device detects that the signal quality of the reference signals sent by all network devices in the plurality of network devices for detecting beam failure meets the beam failure condition, it is determined that the first cell has occurred. Beam failed. Among them, the network device can be a transmission and reception point (Transmit/Receive Point, TRP).

When a beam failure occurs, the terminal device may send first indication information, and the first indication information may be used to indicate at least one cell with available beams, where the at least one cell may include the first cell and/or the first cell. at least one neighboring cell. If the at least one cell includes the first cell, it can be understood that although the first cell has a beam failure, it still has other available beams. It should be noted that an available beam may refer to a beam whose signal quality is greater than or equal to the threshold value, where the signal quality of the beam can be measured by the signal quality of the reference signal. For example, the RSRP of the reference signal corresponding to the beam is greater than or equal to the threshold value. limit. The number of available beams for one cell in the at least one cell may include one or more, which is not limited in this application. The threshold value can be configured in advance by the first cell.

In some embodiments, the first indication information may also be used to indicate beam information of available beams of each cell in at least one cell having available beams. Exemplarily, the beam information of the available beams of each cell may include but is not limited to at least one of the following: the beam identifier (Beam index) of the available beams of each cell, the signal quality measurement results of the available beams of each cell, the available beams of each cell. Beam signal quality measurement result sorting information, where the signal quality measurement result sorting information of the available beams of each cell may include sorting the available beams of each cell from high to low according to the signal quality measurement results, etc.

The first indication information may be carried in a Medium Access Control (Medium Access Control, MAC) control element (Control Element, CE). As shown in Figure 3, it is a schematic structural diagram of the BFR MAC CE. The first indication information in the embodiment of this application can be It is carried in the cell identity, reference signal identity or beam identity fields.

In some embodiments, the above-mentioned at least one neighboring cell may be a candidate cell configured by the network device for low-layer handover. For the relevant description of the candidate cell configured by the network device for low-layer handover, please refer to the description of the previous embodiment, and will not be described again here. . The at least one neighbor cell may refer to at least one candidate cell with available beams among one or more candidate cells configured by the network device. In this implementation, since the network device configures the configuration information of one or more candidate cells for the terminal device, the terminal can measure the signal quality of the reference signal of each candidate cell according to the configuration information, thereby determining which beams of which candidate cells are Available beams. When it is detected that a beam failure occurs in the first cell, not only the available beams of the first cell are reported, but the beam information of the candidate cells with available beams can also be indicated to the network device, so that the network device can select a cell for the terminal device to access. enter.

It can be understood that, in order to facilitate network equipment decision-making, the terminal equipment may also report channel state information other than the beam information of at least one cell, which is not limited in this application.

The following is an example of a possible implementation method for the terminal device to send the first indication information:

In a possible implementation, when the first cell has an available beam, the terminal device may initiate random access on the RO resource corresponding to the available beam of the first cell, and send the first indication information during the random access process or after the random access is completed. It is understandable that if the first cell has multiple available beams, the terminal device may select an available beam and initiate random access on the RO resource corresponding to the available beam. The terminal device may select an available beam with the best signal quality in the first cell, and initiate random access on the RO resource corresponding to the available beam with the best signal quality.

For example, for contention-based random access, if the random access process is four-step random access, the first indication information may be sent in MSG3; if the random access process is two-step random access, then the first indication information may be sent in MSG3. The first indication information is sent in MSGA. For non-contention random access, the first indication information may be sent after the random access is completed. Wherein, the first indication information may be encapsulated in BFR MAC CE.

In a possible implementation manner, the terminal device may send the first indication information through the secondary cell SCell. As an example, if the terminal device is in a carrier aggregation scenario and a beam failure occurs in the primary cell PCell, the terminal device may choose to send the first indication information to the network device through the secondary cell SCell. As another example, if the terminal device is in a dual connectivity scenario, when the primary cell PCell in the MCG fails to beam, the terminal device may choose to send the first indication information to the primary network device through the secondary cell SCell in the MCG. When beam failure occurs in the primary and secondary cells PSCell in the SCG, the terminal device may choose to send the first indication information to the secondary network device through the secondary cell SCell in the SCG.

In a possible implementation manner, if there are available transmission resources on the uplink carrier of the primary cell PCell, the terminal device can also use the transmission resources to send the first indication information.

In a possible implementation, if the terminal device is in the dual connection state, when the primary cell PCell in the MCG fails to beam, the terminal device can also send the first indication information to the secondary network device, and the secondary network device sends the first indication information to the primary network device. The device forwards the first indication information.

In a possible implementation, if the terminal device is in a dual connection state, when a beam failure occurs in the primary and secondary cells PSCell in the SCG, the terminal device can also send the first indication information to the primary network device, and the primary network device sends the first indication information to the secondary cell PSCell in the SCG. The network device forwards the first indication information.

It can be understood that the above possible first indication information sending methods can be implemented individually or in combination. For example, when there is no secondary cell SCell, the terminal device selects the RO resource corresponding to the available beam in the first cell. Initiate random access, thereby sending the first indication information during the random access process or after the random access is completed. For another example, when there is no available beam in the first cell, the first indication information may be sent through the secondary cell SCell.

102. The network device determines, based on the first instruction information, that the terminal device continues to access the first cell or access the target cell in at least one neighboring cell.

In this embodiment of the present application, if the terminal device is in a dual connection scenario, the network device can be the primary network device and/or the secondary network device.

The network device receives the first indication information, and determines to continue accessing the first cell or switch access to a target cell in at least one neighboring cell according to at least one cell indicated in the first indication information. Exemplarily, the network device may determine to continue accessing the first cell or switch access to a target cell in at least one neighboring cell according to beam information of available beams of each cell in the at least one cell.

In a possible implementation, the network device may determine to continue accessing the first cell or to switch to the target cell based on the signal quality and/or the number of available beams of each cell in the at least one cell. As an example, the network device may select the cell corresponding to the beam with the best signal quality of the available beam as the access cell. For example, the first cell is cell 1, the two neighboring cells with available beams are cell 2 and cell 3 respectively, the available beam of cell 1 is beam 4, the available beam of cell 2 is beam 2, and the available beam of cell 3 is beam 3 and beam 4. If the signal quality of beam 2 in cell 2 is the best, cell 2 can be used as the target cell. As another example, the network device may select a cell with the largest number of available beams as the accessed cell. Continuing to take the above cell as an example, cell 3 has the largest number of available beams, so cell 3 is used as the target cell. It can be understood that if cell 1 has the most available beams or the best signal quality, the terminal device can continue to be connected to cell 1, which is not limited in this application. It should be noted that the above-mentioned signal quality of available beams and the number of available beams can be used individually or in combination to determine the cell that the terminal device needs to access.

In a possible implementation, the network device may also first determine whether the first cell has an available beam, and if the first cell has an available beam, continue to access the first cell. This avoids the delay and signaling interaction caused by handover.

If the terminal equipment is in a carrier aggregation scenario, the target cell to be switched to can be understood as switching the primary cell PCell of the terminal equipment from the first cell to the target cell. If the terminal device is in a dual connectivity scenario, and if the first cell is the PCell in the MCG, switching to the target cell can be understood as switching the primary cell PCell in the MCG of the terminal device from the first cell to the target cell. If the first cell is the primary and secondary cell PSCell in the SCG, switching to the target cell can be understood as changing the primary and secondary cell PSCell in the SCG of the terminal device from the first cell to the target cell, that is, the primary and secondary cell change (PSCell change) ). It can be understood that in the PCell handover or PSCell change scenario described above, this application does not limit whether the secondary cell is changed. For example, the secondary cell can be released or remain unchanged.

103. When it is determined that the terminal device accesses the target cell, the network device sends a handover command, and the corresponding terminal device receives the handover command. make.

104. The terminal device switches to the target cell according to the handover command.

Wherein, the handover command includes second instruction information, and the second instruction information is used to instruct the terminal device to switch from the first cell to a target cell in at least one neighboring cell. The terminal device may switch to the target cell according to the second instruction information in the switching command. For an understanding of how the terminal device switches to the target cell in different scenarios, please refer to the description in step 102, which will not be described again here.

In some embodiments, the handover command may further include third indication information, and the third indication information is used to indicate whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell. The configuration information may refer to the information configured by the network device for low-layer handover, for example, the configuration information may include but is not limited to at least one of the following: the reference signal to be measured, the channel state information to be reported, and the channel resource information reported by the channel state information (wherein, the channel resource information reported by the channel state information may refer to the channel resource information used for the channel state information reporting, such as physical uplink control channel resource information). If the third indication information indicates that the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell is retained, the terminal device can still use the switching method of the low-layer handover to perform cell switching. If the third indication information indicates that the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell is not retained, the terminal device needs to use the signaling triggered by the RRC layer to perform switching.

It can be understood that, in order to save signaling, one bit may be used to indicate whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells. For example, if the bit is 1, it indicates that the configuration information of the first cell and/or the configuration information of other neighboring cells is retained. If the bit is 0, it indicates that the configuration information of the first cell and/or other neighboring cells is not retained. configuration information. In some embodiments, the network device can also indicate whether to retain the configuration information of at least one neighboring cell except the target cell in each cell, so that the terminal device only retains the configuration information of the cells adjacent to the target cell. , that is, taking the cell as the granularity to indicate whether to retain the configuration information. For example, the network device may instruct to retain the configuration information of neighbor cell 2 and neighbor cell 3 adjacent to the target cell, but not to retain the configuration information of neighbor cell 4. For another example, the network device may only indicate the neighboring cells whose configuration information needs to be retained, and the configuration information of the neighboring cells that are not indicated will not be retained by default.

Correspondingly, the terminal device processes the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell according to the third instruction information. For example, if the third indication information indicates that the configuration information of the first cell is not retained, the terminal device discards the configuration information of the first cell. For another example, if the third indication information indicates that the configuration information of other neighboring cells is not retained, the terminal device discards the configuration information of other neighboring cells.

In a possible implementation manner, if the terminal device sends the first indication information to the network device through the secondary cell, the network device can also send the handover command to the corresponding terminal device through the secondary cell. In another possible implementation, the terminal device is in a dual connectivity scenario, and if the first cell where beam failure occurs is the primary cell in the MCG, and the first indication information is sent to the primary network device through the secondary network device, then the The primary network device can send the switching command to the terminal device through the corresponding secondary network device. If the first cell where beam failure occurs is the primary and secondary cells in the SCG, and the first indication information is sent to the secondary network device through the primary network device, the secondary network device can switch the The exchange command is sent to the terminal device through the main network device. The switching command may be transmitted through the physical layer or MAC.

105. When it is determined that the terminal device accesses the first cell, the network device sends fifth instruction information. The fifth instruction information is used to instruct the terminal device to continue to access the first cell.

106. The terminal device continues to access the first cell according to the fifth instruction information.

If the network device determines that the terminal device continues to access the first cell, it may indicate through fifth indication information. The transmission method of the fifth indication information may refer to the transmission method of the handover command in the previous embodiment, or may use an implicit indication method. , for example, if the first cell continues to schedule the terminal equipment through downlink control signaling, it means continuing to access the first cell, or if the terminal equipment does not receive an explicit low-layer handover command or an RRC layer handover command, the terminal equipment will continue to access the third cell. A small area.

In a possible implementation, when it is determined that the terminal device continues to access the first cell, the network device may also indicate to the terminal device whether to retain the configuration information of at least one neighboring cell of the first cell, thereby indirectly instructing the terminal device. Subsequently, whether the low-layer switching method is used or the switching method triggered by RRC layer signaling is adopted.

As shown in Figure 4, it is a schematic flow chart of another embodiment of the communication method provided by this application. As shown in Figure 4, the method may include but is not limited to the following steps:

201. When a beam failure is detected in the first cell, the terminal device accesses the first neighboring cell of the first cell. The first neighboring cell is a neighboring cell with an available beam, and the available beam has a signal quality greater than or equal to the threshold. beam.

In an implementation manner, if the terminal device only accesses the serving cell PCell, the first cell may refer to the serving cell PCell serving the terminal device. In one implementation, if the terminal device is in a carrier aggregation scenario, the cell serving the terminal device may include the primary cell PCell and the secondary cell SCell, and the first cell may refer to the primary cell PCell. In one implementation, if the terminal device is in a dual connectivity scenario, the cells serving the terminal device may include the primary cell PCell and the secondary cell SCell in the MCG, and the primary and secondary cells PSCell and the secondary cell SCell in the SCG. The first cell in the embodiment of this application may refer to the primary cell PCell in the MCG, or the first cell may also refer to the primary and secondary cell PSCell in the SCG. In the above-mentioned carrier aggregation scenario or dual connectivity scenario, the first cell where beam failure occurs may also be the secondary cell SCell. If it is a dual connectivity scenario, the first cell may be the secondary cell SCell in the SCG, or it may refer to the secondary cell SCell in the MCG, which is not limited in this application.

For the first cell, the network can configure a reference signal for detecting beam failure for the terminal device. When the terminal device detects that the signal quality of the reference signal of the first cell meets the beam failure condition, it determines that a beam failure occurs in the first cell. fail.

When a beam failure occurs, the terminal device may select a first neighbor cell for access from at least one neighbor cell having an available beam. For example, the cell corresponding to the beam with the best signal quality of the available beams may be selected, or the cell with the largest number of available beams may be selected, which is not limited by this application. If the first cell is the primary cell PCell, the first neighboring cell that the terminal device accesses can be understood as the PCell after handover. If the first cell is the primary and secondary cell PSCell, the first neighboring cell that the terminal device accesses can be understood as The primary and secondary cells PSCell after handover. Among them, at least one of the above neighbors The cell may be a cell configured by the network device for low-layer handover. Correspondingly, the first neighbor cell is also a cell used for low-layer handover.

The terminal device may initiate a random access process on the RO resource corresponding to the available beam of the first neighboring cell to access the first neighboring cell. If the first neighbor cell has multiple available beams, one available beam may be selected for initiating random access. The terminal device may send the identification of the terminal device to the network device through the random access process, so that the network device determines that the terminal device accesses the first neighboring cell. Among them, the identity of the terminal device may include but is not limited to the Cell-Radio Network Temporary Identifier (C-RNTI) allocated by the terminal device in the first cell, because the first neighboring cell belongs to the candidate cell of the first cell. , so the network device can identify the terminal device through the C-RNTI of the terminal device in the first cell. At this time, it is assumed that the C-RNTI of the terminal device remains unchanged during the low-layer handover process. In some embodiments, if the network device configures the C-RNTI of the terminal device in the first neighboring cell when configuring the configuration information of the first neighboring cell for low-layer handover, the identity of the terminal device may refer to the C-RNTI of the terminal device in the first neighboring cell. The C-RNTI of a neighboring cell. At this time, the C-RNTI of the terminal equipment changes during the low-layer handover process and is configured by the respective cell.

In some possible implementations, the terminal device may also send fourth indication information to the network device through a random access process, where the fourth indication information is used to indicate the beam information of the available beam of the first neighboring cell and/or the first Beam information of available beams of other neighboring cells in at least one neighboring cell of the cell except the accessed first neighboring cell. Beam information may include but is not limited to beam identification, beam signal quality measurement results, etc. The network device may determine whether to switch the terminal device to another cell according to the fourth indication information.

Among them, the terminal device identification and/or the fourth indication information may be sent to the network device via MSG3 in the four-step random access process, or may be sent to the network device via MSGA in the two-step random access process, which is not limited in this application. In some embodiments, the terminal device identification and/or the fourth indication information may be encapsulated in a BFR MAC CE for transmission or transmitted using other MAC CEs.

202. The network device determines that the terminal device switches from the first cell to the first neighboring cell of the first cell.

203. The network device communicates with the terminal device through the first neighboring cell.

If the network device receives an identifier including the terminal device during the random access process of the first neighboring cell, it determines that the terminal device is switched from the first cell to the first neighboring cell. The network device may communicate with the terminal device through the first neighbor cell. Specifically and optionally, the network device can configure relevant wireless parameters of the first neighboring cell for the terminal device. Further optionally, the network device may also send candidate cell configuration information to the terminal device through the first neighboring cell, where the candidate cell configuration information is used to indicate a candidate cell associated with the first neighboring cell for low-layer handover, and/or for Configuration information of candidate cells for low-layer handover. The configuration information may include but is not limited to at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for channel status information reporting.

In some embodiments, if the terminal device also sends the fourth indication information to the network device, the network device may determine whether to switch the terminal device to another device based on the beam information of the available beams of each cell indicated in the fourth indication information. community.

In a possible implementation manner, the network device may also indicate to the network device corresponding to the first cell that the terminal device has been switched, and notify the first cell to release the resources allocated to the terminal device in the first cell.

It should be noted that in the above-mentioned embodiment of Figure 2, it is described that when a beam failure occurs in the first cell, the terminal device indicates at least one cell with available beams through the first indication information. In the embodiment of Figure 3, it is described that in the first cell When beam failure occurs, the terminal device may access a first neighboring cell of the first cell that has an available beam. The embodiment in Figure 2 and the embodiment in Figure 3 can be implemented individually or in combination. For example, the terminal device may choose to access the first neighboring cell when certain conditions are met. The condition may include but is not limited to at least one of the following: there is no secondary cell associated with the first cell; the first cell does not have available beams. wait.

For the convenience of description, the beam failure recovery in the embodiment of FIG. 2 or FIG. 3 is called enhanced beam failure recovery. The enhanced beam failure recovery may be performed when the network side allows the terminal device to perform enhanced beam recovery, for example, Network device pre-configuration allows end devices to perform enhanced beam failure recovery. If the network side does not allow the terminal device to perform enhanced beam recovery, the terminal device can only use the original mechanism to recover after beam failure occurs in the primary cell. If it cannot recover and the terminal device finds that the wireless link has failed, it will trigger RRC reconstruction process. The BFR MAC CE transmitted during the enhanced beam failure recovery process can be called enhanced BFR MAC CE.

In some implementations, even if the terminal device reports the first indication information (the first indication information may be carried through the enhanced BFR MAC CE), the network device may not be able to accurately receive it, or the network device may not be able to process it in time. At this time, the terminal The device finds that the wireless link failure conditions have been met, such as random access failure, or the RLC reaches the maximum number of retransmissions, etc., and the terminal device triggers the RRC reconstruction process. During the process of performing reconstruction, the terminal device first performs cell selection (Cell selection), and may select the first neighbor cell of the first cell. The first neighbor cell is a candidate cell configured by the network device for low-layer handover. At this time, the terminal device does not continue the existing RRC reconstruction process, but initiates a random access process in the selected first neighboring cell, and reports its own identity during the random access process, such as through an RRC recovery request or other signaling. Carrying the identity of the terminal device, the first neighboring cell can realize that the terminal device has accessed based on the identity of the terminal device, and can reconfigure some wireless parameters to achieve rapid recovery of data wireless bearer transmission and avoid long-term data transmission caused by the reconstruction process. Interrupt.

As shown in Figure 5, this is a schematic flow chart of another embodiment of the communication method provided by this application. As shown in Figure 5, the method may include but is not limited to the following steps:

301. The network device determines that the terminal device needs to be handed over from the first cell to the target cell.

In one implementation, the network device may determine to switch the terminal device from the first cell to the first cell based on the signal quality of the reference signal of the first cell measured by the terminal device and/or the signal quality of at least one neighboring cell of the first cell. target neighborhood. Wherein, the at least one neighboring cell may be a candidate cell for low-layer handover configured by the network device, and the network device may also configure the configuration information of each candidate cell for the terminal device. For detailed description of the configuration information, reference may be made to the description of the foregoing embodiments, which will not be described again here.

In other implementations, the network device may determine handover from the first cell to the target cell based on indication information reported by the terminal device, where the indication information is used to indicate the first cell with available beams and/or at least one neighbor of the first cell. community. For example, the available waves of the target cell If the number of beams is the largest, it is determined to switch to the target cell. For this implementation, specific reference may be made to the description of the embodiment in FIG. 2 , which will not be described again here. It should be noted that in this implementation, at least one neighboring cell with available beams may be a candidate cell configured by the network device for low-layer handover.

302. The network device sends a switching command. The switching command includes second indication information and third indication information. The second indication information is used to indicate switching to a target cell in at least one neighboring cell of the first cell; the third indication information The indication information is used to indicate whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell.

The handover command here refers to a low-layer handover command, such as a handover command transmitted through the MAC layer. The handover command needs to indicate the target cell identity. Optionally, it can indicate the beam identity of the access target cell.

303. The terminal device switches from the first cell to the target cell according to the second instruction information.

304. According to the third instruction information, process the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell.

Wherein, the switching command may include second indication information, and the second indication information is used to instruct the terminal device to switch from the first cell to the target cell. The terminal device may switch to the target cell according to the second instruction information in the switching command. If the handover command also includes the beam identifier for accessing the target cell, the terminal device accesses the target cell through the designated beam.

In some embodiments, the handover command may also include third indication information, the third indication information being used to indicate whether to retain the configuration information of the first cell and/or the configuration of other neighboring cells in at least one neighboring cell except the target cell. Information, the at least one neighboring cell may be one or more candidate cells configured by the network device, or the at least one neighboring cell may be at least one cell with available beams among the one or more candidate cells configured by the network device, this application does not limited. The configuration information may refer to information configured by the network device for low-layer handover. For example, the configuration information may include but is not limited to at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel status information reporting. channel resource information, etc. If the third indication information indicates retaining the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell, the terminal device may still perform cell switching using a low-layer switching switching method. If the third indication information indicates that the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell is not retained, the terminal device needs to use signaling triggered by the RRC layer to perform handover subsequently. . It can be understood that, in order to save signaling, one bit may be used to indicate whether the configuration information of the first cell and/or the configuration information of other neighboring cells is included. In some embodiments, the network device can also indicate whether to retain the configuration information of at least one neighboring cell except the target cell in each cell, so that the terminal device only retains the configuration information of the cells adjacent to the target cell. , that is, taking the cell as the granularity to indicate whether to retain the configuration information. For example, the network device may instruct to retain the configuration information of neighbor cell 2 and neighbor cell 3 adjacent to the target cell, but not to retain the configuration information of neighbor cell 4. For another example, the network device may only indicate the neighboring cells whose configuration information needs to be retained, and the configuration information of the neighboring cells that are not indicated will not be retained by default.

Correspondingly, the terminal device processes the configuration information of the first cell and/or the configuration information of other neighboring cells in at least one neighboring cell except the target cell according to the third instruction information. For example, if the third indication information indicates that the configuration information of the first cell is not retained, the terminal device discards Configuration information of the first cell. For another example, if the third indication information indicates that the configuration information of other neighboring cells is not retained, the terminal device discards the configuration information of other neighboring cells.

It should be noted that each technical solution (or each embodiment) of the present application can be implemented independently or can also be implemented in combination based on certain intrinsic relationships. This application is not limited. And various terms and definitions between various embodiments may be referenced to each other. In each embodiment of the present application, different implementation methods can also be implemented in combination or independently.

Please refer to FIG. 6 , which is a schematic structural diagram of a communication device provided by an embodiment of the present application. The device may be a terminal device or a device in the terminal device. For example, it may be a chip or chip module in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device 400 shown in FIG. 6 may include a transceiver unit 401 and a processing unit 402. in:

The transceiver unit 401 is configured to send first indication information or access a first neighboring cell of the first cell when a beam failure is detected in the first cell, where the first neighboring cell is a neighboring cell with an available beam;

The first indication information is used to indicate at least one cell with available beams, and the at least one cell includes the first cell and/or at least one neighboring cell of the first cell;

Exemplarily, the first indication information is also used to indicate beam information of available beams of each cell in the at least one cell.

Exemplarily, the beam information of the available beams of each cell includes at least one of the following: the beam identification of the available beams of each cell, the signal quality measurement results of the available beams of each cell, the available beams of each cell. Beam's signal quality measurement result ranking information.

Exemplarily, the first indication information is carried in the beam failure recovery BFR media access control MAC control element CE.

Exemplarily, the transceiver unit 401 is specifically configured to initiate random access on the random access channel timing RO resource corresponding to the available beam of the first cell when it is determined that the first cell has an available beam. The first indication information is sent during the random access process or after the random access is completed.

Exemplarily, the first cell is the primary cell in the primary cell group;

The transceiver unit 401 is specifically configured to send the first indication information through the secondary cell in the primary cell group;

Or, if there are available transmission resources on the uplink carrier of the primary cell, use the transmission resources to send the first indication information;

Or, send the first indication information to the secondary network device.

Exemplarily, the first cell is a primary and secondary cell in a secondary cell group;

The transceiver unit 401 is specifically configured to send the first indication information through the secondary cells in the secondary cell group;

Or, send the first indication information to the main network device.

Exemplarily, the transceiver unit 401 is further configured to receive a switching command, where the switching command includes second indication information, and the second indication information is used to indicate switching to the target cell in the at least one neighboring cell;

The processing unit 402 is configured to switch to the target cell according to the second indication information.

Exemplarily, the handover command further includes third indication information, the third indication information is used to indicate whether to retain the configuration information of the first cell and/or the at least one neighboring cell except the target cell. Configuration information of other neighboring cells;

The processing unit 402 is further configured to process the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell according to the third indication information.

Exemplarily, the configuration information includes at least one of the following: reference signals that need to be measured, channel state information that needs to be reported, and channel resource information that needs to be reported.

Exemplarily, the transceiver unit 401 is specifically configured to initiate random access on the RO resource corresponding to the available beam of the first neighboring cell to access the first neighboring cell.

Exemplarily, the identification of the terminal device and/or the fourth indication information are sent to the network device through the random access process;

Exemplarily, the neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is a handover triggered by signaling at the physical layer or MAC layer.

For the relevant content of this implementation mode, please refer to the relevant content of the above method embodiment. No further details will be given here.

Figure 6 is reused. Figure 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The device may be a terminal device or a device in the terminal device. For example, it may be a chip or chip module in the terminal device, or a device that can be used in conjunction with the terminal device. The communication device 400 shown in FIG. 6 may include a transceiver unit 401 and a processing unit 402. in:

The transceiver unit 401 is configured to receive a switching command, where the switching command includes second indication information and third indication information, where the second indication information is used to indicate switching to a target cell in at least one neighboring cell of the first cell; The third indication information is used to indicate whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell;

The processing unit 402 is configured to switch from the first cell to the target cell according to the second instruction information; and, according to the third instruction information, configure the configuration information of the first cell and/or the The configuration information of other neighboring cells in the at least one neighboring cell except the target cell is processed.

Exemplarily, the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for reporting channel status information.

Exemplarily, the at least one neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is through physical Handover triggered by management layer or MAC layer signaling.

Please refer to FIG. 7 , which is a schematic structural diagram of another communication device provided by an embodiment of the present application. The device may be a network device or a device in the network device. For example, it may be a chip or chip module in the network device, or a device that can be used in conjunction with the network device. The communication device 500 shown in FIG. 7 may include a transceiver unit 501 and a processing unit 502. in:

The transceiver unit 501 is configured to receive first indication information, where the first indication information is used to indicate at least one cell having an available beam, where the at least one cell includes a first cell and/or at least one neighboring cell of the first cell, where the first cell is a cell where a beam failure occurs, and where the available beam is a beam having a signal quality greater than or equal to a threshold value;

The processing unit 502 is configured to determine, according to the first indication information, that the terminal device continues to access the first cell or access the target cell in the at least one neighboring cell.

Exemplarily, the neighboring cell is a candidate cell for low-layer handover, and the low-layer handover is a handover triggered by signaling at the physical layer or MAC layer.

Exemplarily, the transceiver unit 501 is further configured to send a switching command, where the switching command includes second indication information, and the second indication information is used to indicate that the terminal equipment has accessed the target cell. Handover to a target cell in the at least one neighboring cell.

Exemplarily, the handover command further includes third indication information, the third indication information is used to indicate whether to retain the configuration information of the first cell and/or the at least one neighboring cell except the target cell. Configuration information of other neighboring cells.

Figure 7 is reused. Figure 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application. The device may be a network device or a device in the network device. For example, it may be a chip or chip module in the network device, or a device that can be used in conjunction with the network device. The communication device 500 shown in FIG. 7 may include a transceiver unit 501 and a processing unit 502. in:

The processing unit 502 is configured to determine that the terminal equipment switches from the first cell to a first neighboring cell of the first cell, the first cell is a cell where beam failure occurs, and the first neighboring cell is a neighboring cell with available beams. Cell, the available beams are beams whose signal quality is greater than or equal to the threshold value;

Transceiver unit 501, configured to communicate with the terminal device through the first neighboring cell.

Exemplarily, the processing unit 502 is specifically configured to determine that the terminal device is switched from the first cell to the first neighboring cell if the identifier of the terminal device is received during a random access process of the first neighboring cell.

For example, if the random access process is four-step random access, the identity of the terminal device is carried in MSG3;

Exemplarily, the transceiver unit 501 is specifically configured to send candidate cell information to the terminal device through the first neighboring cell, where the candidate cell information is used to indicate candidates for low-layer handover associated with the first neighboring cell. cell, and/or configuration information of the candidate cell for low-layer handover, where the low-layer handover is a handover triggered by physical layer or MAC layer signaling.

The relevant contents of this implementation mode can be found in the relevant contents of the above method embodiment, and will not be described in detail here.

The processing unit 502 is configured to determine that the terminal equipment needs to be switched from the first cell to the target cell, where the target cell is a cell in at least one neighboring cell of the first cell;

Transceiver unit 501, configured to send a switching command, where the switching command includes second indication information and third indication information. The second indication information is used to indicate switching to the target cell; the third indication information is used to indicate Whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell.

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of the present application, which is used to implement the functions of the terminal equipment in FIG. 2 , FIG. 4 and FIG. 5 . The communication device 600 may be a terminal device or a device for a terminal device. The device for the terminal device may be a chip system or a chip within the terminal device. Among them, the chip system can be composed of chips, or can also include chips and other discrete devices.

Alternatively, the communication device 600 is used to implement the functions of the network equipment in FIG. 2, FIG. 4, and FIG. 5. The communication device may be a network device or a device for a network device. The means for the network device may be a system-on-a-chip or chip within the network device.

The communication device 600 includes at least one processor 620, which is used to implement the data processing function of the terminal device or network device in the method provided by the embodiment of the present application. The communication device 600 may also include a communication interface 610, which is used to implement the sending and receiving operations of the terminal device or the network device in the method provided by the embodiment of the present application. In this embodiment of the present application, the processor 620 may be a central processing unit (Central Processing Unit, CPU). The processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), or application specific integrated circuits. (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. In this embodiment of the present application, the communication interface 610 may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces for communicating with other devices through a transmission medium. For example, the communication interface 610 is used for devices in the communication device 600 to communicate with other devices. The processor 620 uses the communication interface 610 to send and receive data, and is used to implement the method described in Figure 2 or Figure 4 or Figure 5 in the above method embodiment.

Communication device 600 may also include at least one memory 630 for storing program instructions and/or data. Memory 630 and processor 620 are coupled. The coupling in the embodiment of this application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. Processor 620 may cooperate with memory 630. Processor 620 may execute program instructions stored in memory 630. At least one of the at least one memory may be included in the processor.

When the communication device 600 is turned on, the processor 620 can read the software program in the memory 630, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 620 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit (not shown in Figure 8). The radio frequency circuit performs radio frequency processing on the baseband signal and transmits the radio frequency signal through the antenna to the electromagnetic wave. The form is sent out. When data is sent to the communication device 600, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 620. The processor 620 converts the baseband signal into data and processes the data. for processing.

In another implementation, the radio frequency circuit and antenna can be set up independently of the processor 620 that performs baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be set up remotely and independently of the communication device. layout.

The embodiment of the present application does not limit the specific connection medium between the communication interface 610, the processor 620 and the memory 630. In the embodiment of the present application, the memory 630, the processor 620 and the communication interface 610 are connected through a bus 640 in Figure 8. The bus is represented by a thick line in Figure 8. The connection methods between other components are only schematically explained. , is not limited. The bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 8, but it does not mean that there is only one bus or one type of bus.

When the communication device 600 is used in a terminal device, for example, when the communication device 600 is a chip or a chip system, the communication interface 610 may output or receive a baseband signal. When the communication device 600 is specifically a terminal device, what the communication interface 610 outputs or receives may be a radio frequency signal.

It should be noted that the communication device can perform the relevant steps of the terminal device or the network device in the foregoing method embodiments. For details, please refer to the implementation provided by each of the above steps, which will not be described again here.

For various devices and products applied or integrated in communication devices, each module included in them can be implemented in the form of hardware such as circuits. Different modules can be located in the same component (for example, a chip, circuit module, etc.) or in different components in the terminal. , or at least part of the modules can be implemented in the form of a software program that runs on the processor integrated inside the terminal, and the remaining (if any) part of the module Blocks can be implemented in hardware such as circuits.

The memory described above may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (ROM), programmable rom (PROM), erasable programmable read-only memory (erasable prom, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM) ), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), Synchronously connect dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The embodiment of the present application provides a chip. The chip includes: a processor and a memory. The number of processors can be one or more, and the number of memories can be one or more. The processor can execute the communication method shown in FIG. 2 or FIG. 4 or FIG. 5, and the steps executed in the related implementation methods by reading instructions and data stored in the memory.

As shown in Figure 9, Figure 9 is a schematic structural diagram of a module device provided by an embodiment of the present application. The module device 700 can perform the relevant steps of the terminal device or network device in the aforementioned method embodiment. The module device 700 includes: a communication module 701, a power module 702, a storage module 703 and a chip module 704. Among them, the power module 702 is used to provide power for the module device; the storage module 703 is used to store data and/or instructions; the communication module 701 is used to communicate with external devices; the chip module 704 is used to call the storage module The data and/or instructions stored in 703, combined with the communication module 701, can execute the above-mentioned communication method shown in Figure 2 or Figure 4 or Figure 5, as well as the steps performed by related implementations.

An embodiment of the present application also provides a computer-readable storage medium. The computer readable storage medium stores a computer program, and the computer program includes program instructions. When the electronic device executes the program instructions, the terminal device or network in the communication method shown in Figure 2 or Figure 4 or Figure 5 is implemented. The steps performed by the device.

The computer-readable storage medium may be an internal storage unit of the terminal device or network device described in any of the preceding embodiments, such as a hard disk or memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device or network device, such as a plug-in hard disk, a smart media card (SMC), or a secure digital device equipped on the device. , SD) card, flash card, etc. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal device or network device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or network device. The computer-readable storage medium may also be used to temporarily store information that has been output or is to be output. data. The computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server or a data center that contains one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, high-density digital video disc (DVD)), or semiconductor media. The semiconductor medium may be a solid state drive.

Regarding the various modules/units included in each device and product described in the above embodiments, they may be software modules/units or hardware modules/units, or they may be partly software modules/units and partly hardware modules/units. . For example, for various devices and products applied to or integrated into a chip, each module/unit included therein can be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of a software program. The software program Running on the processor integrated inside the chip, the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated into the chip module, each module/unit included in it can They are all implemented in the form of hardware such as circuits. Different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components. Alternatively, at least some modules/units can be implemented in the form of software programs. The software program runs on the processor integrated inside the chip module, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for each device and product that is applied to or integrated in the data collection node, it includes Each module/unit can be implemented in the form of hardware such as circuits. Different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal, or at least some of the modules/units can use software programs. This software program runs on the processor integrated inside the data acquisition node, and the remaining (if any) modules/units can be implemented using circuits and other hardware methods.

The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods during actual implementation; for example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in various embodiments of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes a number of instructions to cause a computer device (which can be a personal computer, a server, or a gateway node, etc.) to execute some steps of the method described in various embodiments of the present invention.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. During execution, the process may include the processes of the embodiments of each of the above methods. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

What is disclosed above is only a preferred embodiment of the present application. Of course, it cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand all or part of the processes for implementing the above embodiments, and according to the rights of the present application Equivalent changes required are still within the scope of the application.

Claims

A communication method, characterized by including:

When it is detected that a beam failure occurs in the first cell, send first indication information or access a first neighboring cell of the first cell, where the first neighboring cell is a neighboring cell with an available beam;

The first indication information is used to indicate at least one cell with available beams, and the at least one cell includes the first cell and/or at least one neighboring cell of the first cell;

The available beams are beams whose signal quality is greater than or equal to the threshold value.
The method according to claim 1, wherein the first indication information is also used to indicate beam information of available beams of each cell in the at least one cell.
The method of claim 2, wherein the beam information of the available beams of each cell includes at least one of the following: a beam identifier of the available beams of each cell, and a signal quality of the available beams of each cell. Measurement results, and ranking information of signal quality measurement results of available beams of each cell.
The method according to any one of claims 1 to 3, characterized in that the first indication information is carried in a beam failure recovery BFR media access control MAC control element CE.
The method according to any one of claims 1 to 4, characterized in that sending the first indication information includes:

When it is determined that the first cell has an available beam, random access is initiated on the random access channel opportunity RO resource corresponding to the available beam of the first cell, during the random access process or in the The first indication information is sent after the random access is completed.
The method according to any one of claims 1 to 4, characterized in that the first cell is a primary cell in a primary cell group; and the sending of the first indication information includes:

Send the first indication information through the secondary cell in the primary cell group;

Or, if there are available transmission resources on the uplink carrier of the primary cell, use the transmission resources to send the first indication information;

Or, send the first indication information to the secondary network device.
The method according to any one of claims 1 to 4, characterized in that the first cell is a primary and secondary cell in a secondary cell group; and the sending of the first indication information includes:

Send the first indication information through the secondary cells in the secondary cell group;

Or, if there are available transmission resources on the uplink carrier of the primary and secondary cells, use the transmission resources to send the first indication information;

Or, send the first indication information to the main network device.
The method according to any one of claims 1 to 7, characterized in that after sending the first indication information, it further includes:

Receive a handover command, the handover command including second indication information, the second indication information being used to instruct handover to the target cell in the at least one neighboring cell;

Handover to the target cell according to the second indication information.
The method of claim 8, wherein the switching command further includes third indication information, the third indication information being used to indicate whether to retain the configuration information of the first cell and/or the at least one Configuration information of other neighboring cells in the neighboring cells except the target cell;

The method also includes:

According to the third indication information, the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell are processed.
The method of claim 9, wherein the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resource information that needs to be reported.
The method according to claim 1, wherein the first neighboring cell accessing the first cell comprises:

A random access is initiated on the RO resource corresponding to the available beam of the first neighboring cell to access the first neighboring cell.
The method according to claim 11, characterized in that the identification of the terminal device and/or the fourth indication information are sent to the network device through the random access process;

Wherein, the fourth indication information is used to indicate the beam information of available beams of the first neighboring cell and/or the beam information of at least one neighboring cell of the first cell except the accessed first neighboring cell. Beam information of available beams of other neighboring cells.
The method according to any one of claims 1 to 12, characterized in that the neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is triggered by signaling at the physical layer or MAC layer. switch.
A communication method, characterized by including:

Receive first indication information, the first indication information being used to indicate at least one cell with available beams, the at least one cell including a first cell and/or at least one neighboring cell of the first cell, the first The cell is a cell where beam failure occurs, and the available beams are beams whose signal quality is greater than or equal to the threshold value;

According to the first indication information, it is determined that the terminal equipment continues to access the first cell or access the target cell in the at least one neighboring cell.
The method of claim 14, wherein the neighboring cell is a candidate cell for low-layer handover, and the low-layer handover is a handover triggered by signaling at the physical layer or MAC layer.
The method according to claim 14 or 15, characterized in that the method further includes:

When it is determined that the terminal equipment has accessed the target cell, a handover command is sent, where the handover command includes second indication information, and the second indication information is used to instruct handover to the at least one neighboring cell. Target neighborhood.
The method of claim 16, wherein the switching command further includes third indication information, the third indication information being used to indicate whether to retain the configuration information of the first cell and/or the at least one Other neighboring cells in the neighboring cells except the target cell Zone configuration information.
The method of claim 17, wherein the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for reporting channel status information.
A beam failure recovery method, characterized by including:

Determine that the terminal equipment switches from the first cell to a first neighboring cell of the first cell, the first cell is a cell where beam failure occurs, the first neighboring cell is a neighboring cell with an available beam, and the available beam It is a beam whose signal quality is greater than or equal to the threshold value;

Communicate with the terminal device through the first neighbor cell.
The method according to claim 19, wherein the determining that the terminal device is switched from the first cell to the first neighboring cell of the first cell comprises:

If the identification of the terminal device is received during the random access process of the first neighboring cell, it is determined that the terminal device is switched from the first cell to the first neighboring cell.
The method according to claim 20, characterized in that, if the random access process is a four-step random access, the identity of the terminal device is carried in MSG3;

If the random access process is a two-step random access, the identity of the terminal device is carried in the MSGA.
The method according to any one of claims 19 to 21, characterized in that communicating with the terminal device through the first neighboring cell includes:

Candidate cell information is sent to the terminal device through the first neighboring cell, and the candidate cell information is used to indicate a candidate cell associated with the first neighboring cell for low-layer switching, and/or configuration information of the candidate cell for low-layer switching, and the low-layer switching is a switching triggered by physical layer or MAC layer signaling.
The method of claim 22, wherein the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for reporting channel status information.
A communication method, characterized by including:

Receive a handover command, where the handover command includes second indication information and third indication information. The second indication information is used to instruct handover to a target cell in at least one neighboring cell of the first cell; the third indication information is used Instructing whether to retain the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell;

Handover from the first cell to the target cell according to the second indication information;

According to the third indication information, the configuration information of the first cell and/or the configuration information of other neighboring cells in the at least one neighboring cell except the target cell are processed.
The method as claimed in claim 24 is characterized in that the configuration information includes at least one of the following: a reference signal to be measured, channel state information to be reported, and a channel resource for reporting the channel state information.
The method according to claim 24 or 25, characterized in that the at least one neighboring cell is a candidate cell configured by the network device for low-layer handover, and the low-layer handover is a handover triggered by physical layer or MAC layer signaling. .
A communication method, characterized by including:

Determining that the terminal equipment needs to be handed over from the first cell to a target cell, where the target cell is a cell in at least one neighboring cell of the first cell;

Send a switching command, where the switching command includes second indication information and third indication information, the second indication information is used to indicate switching to the target cell; the third indication information is used to indicate whether to retain the first Configuration information of the cell and/or configuration information of other neighboring cells in the at least one neighboring cell except the target cell.
The method of claim 27, wherein the configuration information includes at least one of the following: reference signals that need to be measured, channel status information that needs to be reported, and channel resources for reporting channel status information.
A communication device, characterized by including:

A transceiver unit, configured to send first indication information or access a first neighboring cell of the first cell when a beam failure is detected in the first cell, and the first neighboring cell is a neighboring cell with an available beam;

The first indication information is used to indicate at least one cell with available beams, and the at least one cell includes the first cell and/or at least one neighboring cell of the first cell;

The available beams are beams whose signal quality is greater than or equal to the threshold value.
A communication device, comprising:

A transceiver unit, configured to receive first indication information, the first indication information being used to indicate at least one cell with available beams, the at least one cell including a first cell and/or at least one neighboring cell of the first cell. , the first cell is a cell where beam failure occurs, and the available beam is a beam whose signal quality is greater than or equal to the threshold value;

A processing unit configured to determine, according to the first indication information, that the terminal equipment continues to access the first cell or access the target cell in the at least one neighboring cell.
A communication device, characterized by including:

A processing unit, configured to determine that a terminal device is switched from a first cell to a first neighboring cell of the first cell, where the first cell is a cell where a beam failure occurs, the first neighboring cell is a neighboring cell having an available beam, and the available beam is a beam having a signal quality greater than or equal to a threshold value;

A transceiver unit configured to communicate with the terminal device through the first neighboring cell.
A communication device, characterized in that the communication device includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, and the computer program includes program instructions, so The processor calls the program instructions to perform the method as described in any one of claims 1 to 13, or to perform the method as described in any one of claims 14 to 18, or The person performs the method as described in any one of claims 19-23, or performs the method as described in any one of claims 24-26, or performs the method as described in any one of claims 27-28.
A chip, characterized in that the chip includes a processor and an interface, the processor is coupled to the interface; the interface is used to receive or output signals, and the processor is used to execute code instructions to execute the rights The method according to any one of claims 1 to 13, or the method according to any one of claims 14 to 18, or the method according to any one of claims 19 to 23, or the method according to any one of claims 19 to 23. The method according to any one of claims 24-26, or performing the method according to any one of claims 27-28.
A module device, characterized in that the module device includes a communication module, a power module, a storage module and a chip module, wherein:

The power module is used to provide electrical energy to the module equipment;

The storage module is used to store data and/or instructions;

The communication module is used to communicate with external devices;

The chip module is used to call the data and/or instructions stored in the storage module, combined with the communication module, to execute the method as described in any one of claims 1 to 13, or to execute the method as claimed in claims 14 to 13. 18. The method according to any one of claims 19-23, or the method according to any one of claims 24-26, or the method according to any one of claims 27-23. The method described in any one of 28.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the electronic device executes the program instructions, any of claims 1 to 13 is implemented. The method described in any one of claims 14 to 18, or the method described in any one of claims 19-23, or the method described in any one of claims 24-26. The method described in claim 27-28, or the method described in any one of claims 27-28.