Communication method and communication device

Abstract

The present application provides a communication method and a communication device. In a scenario where an Xn connection cannot be established between access network devices, a first access network device sends a first request message to a terminal device. The first request message is used to request the terminal device to report information related to a first cell corresponding to a PCI. The terminal device obtains and reports the information related to the first cell to the first access network device according to the first request message. Thus, the first access network device can perform cell handover according to the information related to the first cell.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0002] In a long term evolution (LTE) based self-organising network (SON) system, an automatic neighbor relation (ANR) function is proposed for neighboring cells. An important aspect of the ANR function is to discover new cells and attempt to add them as neighboring cells for potential subsequent handover targets.

[0003] In the current ANR measurement reporting process, a terminal device reports the cell global identifier (CGI) corresponding to the physical cell identifier (PCI) to an access network device (hereinafter referred to as: the first access network device). After receiving the CGI, the first access network device initiates an Xn (e.g., X2) connection establishment request to the access network device corresponding to the CGI (hereinafter referred to as: the second access network device) to establish an Xn connection with the second access network device. During the Xn connection process, the second access network device sends information such as the bandwidth and subcarrier spacing (SCS) corresponding to the cell to the first access network device, and the first access network device can perform handover based on this information subsequently.

[0004] Currently, there is a scenario where the access network device does not support the Xn interface. In this case, the first access network device needs to initiate a handover to the second access network device through the core network device. Since the first access network device cannot obtain the relevant information required for handover from the second access network device through the Xn interface, the first access network device cannot execute the handover process. Summary of the Invention

[0005] This application provides a communication method and a communication device. In a scenario where an Xn connection cannot be established between access network devices, cell handover can be achieved by having the terminal device obtain relevant information about the cell.

[0006] In a first aspect, a communication method is provided, including: a terminal device receives a first request message sent by a first access network device, where the first request message is used to request the terminal device to report information related to a first cell corresponding to a Physical Cell Identifier (PCI); the terminal device obtains the information related to the first cell according to the first request message, and then the terminal device sends the information related to the first cell to the first access network device. Among them, the information related to the first cell includes the subcarrier spacing (SCS) information of the first cell and the bandwidth information of the first cell.

[0007] In this application, the access network device corresponding to the first cell is a second access network device.

[0008] Optionally, the bandwidth information of the first cell corresponds to the SCS information of the first cell.

[0009] Optionally, the bandwidth information of the first cell may include one or more bandwidth information, and the SCS information of the first cell includes one or more SCS information. That is to say, the first cell can support one or more bandwidths, as well as one or more SCSs, and each bandwidth has a corresponding SCS.

[0010] Optionally, the bandwidth information of the first cell may include the bandwidth information of the downlink of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the bandwidth information of the downlink of the first cell.

[0011] Optionally, the bandwidth information of the first cell may include the bandwidth information of the uplink of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the bandwidth information of the uplink of the first cell.

[0012] Optionally, the bandwidth information of the first cell may include the bandwidth information of the supplementary uplink (SUL) of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the bandwidth information of the supplementary uplink of the first cell.

[0013] According to the method provided in this application, in a scenario where the first access network device and the second access network device cannot communicate, the terminal device obtains and provides the information related to the first cell corresponding to the second access network device to the first access network device, so that the first access network device can perform cell handover according to the information related to the first cell.

[0014] Combined with the first aspect, in some implementation manners of the first aspect, the terminal device obtains the information related to the first cell according to the first request message, including: the terminal device reads the system broadcast message of the first cell according to the first request message, and the system broadcast message includes the information related to the first cell.

[0015] Based on this solution, the terminal device can obtain the relevant information of the first cell from the system broadcast message of the first cell.

[0016] Optionally, before the terminal device reads the system broadcast message of the first cell according to the first request message, the method further includes: the terminal device sends a second request message to the second access network device according to the first request message, and the second request message is used to request the second access network device to send the system broadcast message.

[0017] Based on this solution, the terminal device can request the second access network device to send the system broadcast message based on the request of the first access network device. Thus, the terminal device can obtain the relevant information of the first cell from the system broadcast message of the first cell.

[0018] Combined with the first aspect, in some implementation manners of the first aspect, the relevant information of the first cell further includes one or more of the following: the cell identifier of the first cell, the information on whether the first cell is allowed to access, the information on whether the first cell is a non-standalone (NSA) cell, the public land mobile network (PLMN) information of the first cell, the tracking area code (TAC) information of the first cell, the boundary information of the first cell, and the bit information of the identifier of the second access network device in the cell identifier of the first cell. Among them, the bit information is used to determine the identifier of the second access network device.

[0019] The above information can be used for cell handover. For example, the information on whether the first cell is allowed to access and / or the information on whether the first cell is an NSA cell can be used to determine whether to allow access to the first cell. The PLMN information of the first cell and the TAC information of the first cell can be used by the core network device to discover the second access network device. The cell identifier of the first cell and the bit information can be used to determine the identifier of the second access network device, so that the access network device can determine the access network device corresponding to the target cell (i.e., the first cell).

[0020] Optionally, the bit information can also be fixed by the protocol or pre-configured, and this application does not make any limitations in this regard.

[0021] Optionally, the boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

[0022] Combined with the first aspect, in some implementation manners of the first aspect, before the terminal device receives the first request message sent by the first access network device, the method further includes: the terminal device sends the PCI to the first access network device.

[0023] In a second aspect, a communication method is provided, including: a first access network device sends a first request message to a terminal device, where the first request message is used to request the terminal device to report information related to a first cell corresponding to a PCI; the first access network device receives the information related to the first cell sent by the terminal device, and the information related to the first cell includes subcarrier spacing (SCS) information of the first cell and bandwidth information of the first cell.

[0024] In this application, the access network device corresponding to the first cell is a second access network device.

[0025] According to the method provided in this application, in a scenario where the first access network device and the second access network device cannot communicate, the terminal device obtains and provides the information related to the first cell corresponding to the second access network device to the first access network device, so that the first access network device can perform cell handover according to the information related to the first cell.

[0026] It should be understood that for the detailed content of the bandwidth information of the first cell and the SCS information of the first cell, reference can be made to the description in the first aspect, which will not be elaborated here.

[0027] In combination with the second aspect, in some implementation manners of the second aspect, the information related to the first cell is obtained by the terminal device by reading the system broadcast message of the first cell. That is to say, the terminal device can obtain the information related to the first cell from the system broadcast message of the first cell.

[0028] In combination with the second aspect, in some implementation manners of the second aspect, the information related to the first cell further includes one or more of the following: the cell identifier of the first cell, the information indicating whether access to the first cell is allowed, the information indicating whether the first cell is an NSA cell, the PLMN information of the first cell, the TAC information of the first cell, the boundary information of the first cell, and the bit information of the identifier of the second access network device in the cell identifier of the first cell. Among them, the bit information is used to determine the identifier of the second access network device.

[0029] Optionally, the bit information may also be fixed by a protocol or pre-configured, and this application does not make any limitations thereto.

[0030] Optionally, the boundary information of the first cell includes the absolute frequency point information of a reference resource block, or includes the absolute frequency point information of a reference resource block and offset value information.

[0031] In combination with the second aspect, in some implementations of the second aspect, the method may further include: the first access network device determines whether the terminal device can be switched to the first cell according to one or more of the following information: information on whether the first cell is allowed to be accessed, information on whether the first cell is an NSA cell, bandwidth information of the first cell, and SCS information of the first cell; if the terminal device can be switched to the first cell, the first access network device sends a handover request message to the core network device, where the handover request message is used to request to switch the terminal device to the first cell, and the handover request message includes the identifier of the second access network device.

[0032] For example, if the first cell is allowed to be accessed or the first cell is not an NSA cell, and the bandwidth information of the first cell matches the bandwidth information supported by the terminal device, and the SCS information of the first cell matches the SCS information supported by the terminal device, then the terminal device can access the first cell.

[0033] Optionally, the handover request message may further include the PLMN information of the first cell and / or the TAC information of the first cell.

[0034] Optionally, the method may further include: the first access network device receives a first handover command sent by the core network device; the first access network device sends a second handover command to the terminal device according to the first handover command to switch the terminal device to the first cell.

[0035] Based on this solution, in a scenario where the first access network device and the second access network device cannot communicate, the terminal device obtains and provides the first access network device with the relevant information of the first cell corresponding to the second access network device, and the first access network device can perform core network-based cell handover according to the relevant information of the first cell.

[0036] In a third aspect, a communication device is provided, including various modules or units for executing the method in the first aspect or any possible implementation manner of the first aspect.

[0037] In a fourth aspect, a communication device is provided, including various modules or units for executing the method in the second aspect or any possible implementation manner of the second aspect.

[0038] In a fifth aspect, a communication device is provided, including a processor. The processor can be used to execute the involved instructions so that the device executes the method in the first aspect or any possible implementation manner of the first aspect. Optionally, the device may further include a memory, the memory is coupled to the processor, and the involved instructions are stored in the memory. Optionally, the device may further include an interface circuit, and the interface circuit is coupled to the processor.

[0039] In a sixth aspect, a device is provided, including a processor. The processor can be used to execute the involved instructions so that the device executes the method in the above second aspect or any possible implementation manner in the second aspect. Optionally, the device may further include a memory coupled to the processor, and the involved instructions are stored in the memory. Optionally, the device may further include an interface circuit coupled to the processor.

[0040] In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit the signal through the output circuit, so that the processor executes the method in the first aspect to the second aspect or any possible implementation manner in the first aspect to the second aspect.

[0041] In a specific implementation process, the above device or processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be transistors, gate circuits, flip-flops, and various logic circuits, etc. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be output to, for example, but not limited to, a transmitter and transmitted by the transmitter, and the input circuit and the output circuit may be the same circuit, which is used as the input circuit and the output circuit at different times respectively. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

[0042] In an eighth aspect, a processing device is provided, including a processor and a memory. The processor is used to read the instructions stored in the memory, and can receive a signal through a receiver and transmit the signal through a transmitter to execute the method in the first aspect to the second aspect or any possible implementation manner in the first aspect to the second aspect.

[0043] In a feasible design, the processor is one or more, and the memory is one or more.

[0044] In a feasible design, the memory may be integrated with the processor, or the memory is separately arranged from the processor.

[0045] In a specific implementation process, the memory may be a non-transitory memory, such as a read only memory (ROM), which may be integrated with the processor on the same chip or may be separately arranged on different chips. The embodiments of the present application do not limit the type of the memory and the setting manner of the memory and the processor.

[0046] It should be understood that the related information interaction process, for example, sending the related information of the first cell, may be a process of controlling information output from the processor, and receiving the related information of the first cell may be a process of the processor receiving the related information of the first cell. Specifically, the processed output data may be output to the transmitter, and the input data received by the processor may come from the receiver. Among them, the transmitter and the receiver may be collectively referred to as a transceiver.

[0047] The processing device in the above eighth aspect may be a chip, and the processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor may be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory may be integrated in the processor or may be located outside the processor and exist independently.

[0048] In a ninth aspect, there is provided a computer program product, which includes: a computer program (which may also be referred to as code or instruction). When the computer program is run, it causes the computer to execute the methods in the above first aspect to the second aspect and any possible implementation manner in the first aspect to the second aspect.

[0049] In a tenth aspect, there is provided a computer-readable medium, which stores a computer program (which may also be referred to as code or instruction). When it runs on a computer, it causes the computer to execute the methods in the above first aspect to the second aspect and any possible implementation manner in the first aspect to the second aspect.

[0050] In an eleventh aspect, there is provided a communication system, including one or more of the foregoing first access device, second access network device, and core network device. Optionally, the communication system may further include the foregoing terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of the architecture of a communication system applied to the present application;

[0052] Figure 2 is the process of the terminal device obtaining the CGI of cell B;

[0053] Figure 3 is a schematic flowchart of the communication method provided by the present application;

[0054] Figure 4 is a schematic block diagram of a communication device provided by the present application;

[0055] Figure 5 is a schematic structural diagram of a terminal device provided by the present application;

[0056] Figure 6 It is a schematic block diagram of another device provided by this application. Detailed implementation manners

[0057] Next, the technical solutions in this application will be described with reference to the accompanying drawings. Exemplarily, the features or content identified by dashed lines in the accompanying drawings involved in the embodiments of this application can be understood as optional operations or optional structures of the embodiments.

[0058] The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), 5th Generation (5G) systems, New Radio (NR), or other communication systems that may appear in the future, etc.

[0059] The terminal device in the embodiments of this application may refer to a User Equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device, or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc. The embodiments of this application do not limit this.

[0060] An access network device is a device that can communicate with a terminal device. It can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. It can also be a module or unit that completes some functions of the base station. For example, it can be a central unit (CU) or a distributed unit (DU). Embodiments of this application do not limit the specific technologies and specific device forms adopted by the access network device.

[0061] Core network devices correspond to different devices in different systems. For example, in a 4G network, it can correspond to a mobility management entity (MME) and / or a serving gateway (S-GW); in 5G, it can correspond to an access and mobility management function (AMF), a session management function (SMF), or a user plane function (UPF), etc.

[0062] Figure 1 It is a schematic diagram of the architecture of a communication system applied to this application. As Figure 1 shown, the communication system includes a core network device 110, at least two access network devices (such as Figure 1 the access network device 120 and the access network device 130 in Figure 1 ) and at least one terminal device (such as Figure 1 the terminal device 140 in Figure 1 ). The terminal device accesses the access network device wirelessly. The access network device does not support interface Xn. The access network device and the core network device can communicate through interface NG. The core network device and the access network device can be two independent physical devices, or the functions of the core network device and the logical functions of the access network device can be integrated on the same physical device, or the functions of part of the core network device and part of the access network device can be integrated on one physical device. The terminal device can be fixed in position or movable. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. In Figure 1It is not shown in the figure. The embodiments of the present application do not limit the number of core network devices, access network devices, and terminal devices included in the communication system.

[0063] Figure 1 In the system shown, the current serving cell of the terminal device 140 is cell A. Cell A corresponds to the access network device 120. The physical cell identifier (PCI) of cell A is 3, and the CGI is 17. The terminal device 140 has the ANR function. After the ANR function of the terminal device 140 is enabled, the terminal device 140 can obtain the CGI of cell B corresponding to the access network device 130. For the specific process, refer to Figure 2 .

[0064] Figure 2 It shows the process by which the terminal device obtains the CGI of cell B. Refer to Figure 2 , in step 1, the access network device 120 sends a neighbor cell report request message to the terminal device 140. After receiving the request message, the terminal device 140 measures cell B. If the signal strength of cell B meets the requirements, then in step 2, it reports the PCI of cell B to the access network device. The PCI is 5. In step 3, the access network device sends an CGI report request message to the terminal device. The request message carries the PCI of cell B. After receiving the PCI of cell B, in step 4, the terminal device reads the broadcast channel (BCH) of cell B and obtains the CGI corresponding to the PCI of cell B. The CGI is 19. Finally, in step 5, the terminal device 130 reports the CGI of cell B to the access network device.

[0065] If the access network devices 120 and 130 support the Xn interface, after the access network device 120 receives the CGI of cell B, it can initiate an Xn connection establishment request to the access network device 130 to establish an Xn connection with the access network device 130. During the Xn connection process, the access network device 130 can send information such as the bandwidth and SCS corresponding to cell B to the access network device 120 of the cell. Subsequently, cell A can perform a handover based on this. And in Figure 1 the system shown, at least one of the access network devices 120 and 130 does not support the Xn interface. Therefore, the access network device 120 needs to initiate a handover to the access network device 130 through the core network device 110. Since the access network device 120 cannot obtain the relevant information required for handover, such as the bandwidth and SCS corresponding to cell B, through the Xn interface, the terminal device cannot hand over from cell A to cell B.

[0066] In view of this, the present application provides a communication method. In a scenario where at least one of the access network devices 120 and 130 does not support the Xn interface, the terminal device 140 obtains information for cell handover from the access network device 130, and the terminal device 140 provides the information for cell handover to the access network device 120. Thus, the access network device 120 and the core network device 110 can perform cell handover according to the information for cell handover provided by the terminal device 140.

[0067] Next, in conjunction with Figure 3 , the communication method provided by the present application will be described.

[0068] The embodiments shown below take the interaction among the core network device, the first access network device, the second access network device, and the terminal device as an example, and detail the method provided by the embodiments of the present application. However, this should not impose any limitation on the present application. For example, the terminal device shown in the embodiments below can be replaced by components configured in the terminal device (such as chips, chip systems, or circuits, etc.), the access network device (such as the first access network device or the second access network device) can also be replaced by components configured in the access network device (such as chips, chip systems, or circuits, etc.), and the core network device can also be replaced by components configured in the core network device (such as chips, chip systems, or circuits, etc.).

[0069] It should be understood that Figure 3 the method shown can be applied to Figure 1 or Figure 2 in, Figure 3 in which the terminal device corresponds to Figure 1 the terminal device 140 shown, the first access network device corresponds to the access network device 120, the second access network device corresponds to the access network device 130, the first cell corresponds to cell B, and the core network device corresponds to the core network device 110.

[0070] In addition, those skilled in the art can understand that the CGI is used to distinguish cells. Currently, there are only 512 PCIs in LTE and only 1024 PCIs in NR. Therefore, different cells may use the same PCI. Thus, the PCI usually cannot uniquely identify a cell, so it is necessary to distinguish cells through the CGI. The CGI is usually composed of the PLMN ID + cell identity, but the present application does not limit this.

[0071] Figure 3 shows a schematic flowchart of the communication method provided by the embodiments of the present application. As Figure 3 shown, the method 300 may include S310 to S330. Each step will be specifically described below.

[0072] S310, the first access network device sends a first request message to the terminal device. Correspondingly, the terminal device receives the first request message.

[0073] The first request message is used to request the terminal device to report information related to the first cell, and the information related to the first cell is used by the first access network device for cell handover.

[0074] In one implementation, the first request message may include a PCI (hereinafter denoted as: the first PCI) and indication information. The first PCI is used to identify the first cell, or rather, the first PCI corresponds to the first cell, and the access network device corresponding to the first cell is the second access network device. Alternatively, the PCI may also be replaced with other information used to identify the first cell, which is not limited in the embodiments of the present application. The indication information instructs the terminal device to report the information related to the first cell.

[0075] Specifically, when the terminal device receives the first PCI and the indication information, it is required to obtain the information related to the first cell, such as the bandwidth information of the first cell and / or the SCS information of the first cell. If the terminal device only receives the first PCI, it may not be required to obtain the information related to the first cell, but only obtain the CGI corresponding to the first PCI and the PLMN of the first cell according to the existing technology (similar to Figure 2 step 2 therein).

[0076] In another implementation, the first request message only needs to include the first PCI (or, the PCI may also be replaced with other information used to identify the first cell, which is not limited in the embodiments of the present application), or rather, the first request message may not need to include the indication information. After receiving the first request message, the terminal device can know that it needs to obtain and report the information related to the cell corresponding to the first PCI (i.e., the first cell).

[0077] Compared with the second method, in the first method, by whether to carry the indication information, the first access network device can control whether the terminal device reports the information related to the bandwidth information of the first cell and / or the SCS information of the first cell. Thus, when it is not necessary to report the information related to the bandwidth information of the first cell and / or the SCS information of the first cell (for example, when the access device has an Xn or X2 interface), the terminal device may not report the above-mentioned related information, reducing the signaling overhead of reporting.

[0078] Optionally, the first request message may be a (radio resource control, RRC) reconfiguration message, but the present application is not limited thereto.

[0079] Optionally, before S310, the terminal device may first report the first PCI to the first access network device. This step is similar to Figure 2For step 2 in [it], reference can be made to the prior art for details, which will not be elaborated here.

[0080] Exemplarily, the relevant information of the first cell may include one or more of the following information:

[0081] (1) The bandwidth information of the first cell and / or the SCS information of the first cell. Or rather, the relevant information of the first cell includes the bandwidth information supported by the first cell and / or the SCS information supported by the first cell.

[0082] For example, the relevant information of the first cell may include the bandwidth information of the first cell. In this case, exemplarily, it can be defaulted that the SCS information of the first cell is a fixed value, such as 30 KHZ. Or, the relevant information of the first cell may include the SCS information of the first cell. In this case, it can be defaulted that the bandwidth information of the first cell is a fixed value, such as 100 MHZ.

[0083] Optionally, the bandwidth information of the first cell may include the downlink bandwidth information of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the downlink bandwidth information of the first cell.

[0084] Optionally, the bandwidth information of the first cell may include the uplink bandwidth information of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the uplink bandwidth information of the first cell.

[0085] Optionally, the bandwidth information of the first cell may include the bandwidth information of the supplementary uplink (SUL) of the first cell. Correspondingly, the SCS information of the first cell may include the SCS information corresponding to the bandwidth information of the supplementary uplink of the first cell.

[0086] Optionally, the bandwidth information of the first cell may include one or more bandwidth information, and the SCS information of the first cell may include one or more SCS information. That is to say, the first cell may support one or more bandwidths and one or more SCSs.

[0087] Optionally, the bandwidth information of the first cell may have a corresponding relationship with the SCS information of the first cell. For example, each bandwidth has a corresponding SCS.

[0088] For example, the bandwidth information of the first cell and the SCS information of the first cell may be as shown in Table 1.

[0089] Table 1:

[0090] SCS Bandwidth 15KHz 200PRB 30KHz 150PRB 60KHz 100PRB

[0091] It should be understood that the unit of bandwidth in Table 1 is a physical resource block (PRB), and the bandwidth unit can also be converted into kilohertz (KHz) and the like, which is not limited in the present application.

[0092] (2) Information on the initial BWP of the first cell.

[0093] The information of the initial BWP of the first cell may include frequency domain location information of the initial BWP of the first cell, bandwidth information of the initial BWP, and / or SCS information corresponding to the bandwidth information of the initial BWP. For the specific meaning of the initial BWP, please refer to the prior art.

[0094] (3) Boundary information of the first cell.

[0095] The boundary information of the first cell is used to determine a reference boundary of the first cell.

[0096] For example, the boundary information of the first cell may include the absolute frequency point information of the reference resource block (RB). That is, the reference boundary of the first cell is the absolute frequency point of the reference resource block. The absolute frequency point information of the reference resource block is the frequency of Point A.

[0097] For another example, the boundary information of the first cell may include absolute frequency information of the reference resource block and offset value information (offsettocarrier). The offset value information indicates an offset value of the reference boundary of the first cell relative to the absolute frequency of the reference resource block.

[0098] It can be understood that the starting position of the bandwidth component (BWP) can be determined based on the reference boundary of the first cell. For example, the boundary of the first cell can be considered as the position of PRB0. If the BWP starts at the 10th PRB, then knowing the position of PRB0 can also determine the starting position of the BWP.

[0099] (4) Information on whether access to the first cell is allowed.

[0100] The information on whether the first cell is allowed to be accessed is used to indicate whether access to the first cell is prohibited, or to indicate whether access to the first cell is allowed. Exemplarily, the information on whether the first cell is allowed to be accessed may be cell barred indication information, and the cell barred indication information indicates whether the cell is barred or not barred, that is, whether the cell prohibits access or not prohibits access. The cell barring indication information is used to prohibit access by idle terminal devices. If the first cell is an NSA cell, in order to prevent access by terminal devices, the cell barring indication information may be set to barred.

[0101] (5) Information on whether the first cell is an NSA cell.

[0102] For example, the information on whether the first cell is an NSA cell can specifically be the above-mentioned cell barring indication information. As described above, if the first cell is an NSA cell, in order to prevent access by the terminal device, the cell barring indication information can be set to barred. Therefore, it can be determined whether the first cell is an NSA cell based on the cell barring indication information.

[0103] Again, an NSA cell can have a dedicated identification bit. For example, this bit can be a single bit (bit). When this bit is 1, it indicates that the first cell is an NSA cell; when this bit is 0, it indicates that the first cell is not an NSA cell. Or the meanings of 0 and 1 can be reversed.

[0104] (6) Cell identifier of the first cell.

[0105] The cell identifier of the first cell can be the cell identity or the CGI. As mentioned before, the CGI is usually composed of the PLMN ID and the cell identity. The cell identity can include the identifier of the access network device (i.e., the second access network device) to which the first cell belongs and the identifier of the cell within the second access network device. It should be understood that the identifier of the cell within the second access network device is different from the CGI and the cell identity.

[0106] (7) PLMN information of the first cell.

[0107] The PLMN information of the first cell can be used by the core network device to discover the second access network device.

[0108] (8) TAC information of the first cell.

[0109] The TAC information of the first cell can be used by the core network device to discover the second access network device.

[0110] (9) Bit information of the identifier of the second access network device in the cell identifier of the first cell.

[0111] The bit information refers to the bit position occupied by the identifier of the second access network device in the cell identifier of the first cell, that is, the bit information indicates which bits in the cell identifier of the first cell represent the identifier of the second access network device.

[0112] For example, if the identifier of the second access network device occupies 15 bits and the cell identifier of the first cell is 36 bits, then the high 15 bits of the cell identifier of the first cell are the identifier of the second access network device, and the low 11 bits are the cell identifier of the first cell.

[0113] (10) Information on whether the first cell is suitable for access.

[0114] The information on whether the first cell is suitable for access may include whether the terminal device supports accessing the first cell, or information indicating that it does not support accessing the first cell. Exemplarily, after the terminal device reads the relevant information of the first cell, such as the bandwidth information of the first cell and / or the SCS information of the first cell, the terminal device determines whether it supports the bandwidth and / or SCS, and generates the information on whether the first cell is suitable for access according to the determination result and reports it to the access network device. In this way, the terminal device does not need to report the relevant information of the first cell anymore, and directly tells the first access network device the information on whether the first cell is suitable for access. The first access network device can determine whether to perform a final handover according to this determination result.

[0115] S320, the terminal device obtains the relevant information of the first cell according to the first requested cell.

[0116] Optionally, the terminal device can obtain the relevant information of the first cell by reading the system broadcast message of the first cell. That is to say, the system broadcast message of the first cell may include the relevant information of the first cell.

[0117] Exemplarily, the system broadcast message may be sent periodically (or in a non-on-demand manner), or the system broadcast message may be sent by the second access network device according to the request of the terminal device (or in an on-demand manner). For example, before the terminal device reads the system broadcast message of the first cell, the terminal device may send a second request message to the second access network device according to the first request message, and the second request message is used to request the second access network device to send the system broadcast message. After receiving the second request message, the second access network device may send the system broadcast message.

[0118] Exemplarily, the system information block (SIB) 1 in the system broadcast message may include one or more of the following: the bandwidth information of the first cell, the SCS information of the first cell, the cell identifier of the first cell, the information on whether the first cell is an NSA cell, and the bit information of the identifier of the second access network device in the cell identifier of the first cell.

[0119] Exemplarily, the master information block (MIB) in the system broadcast message may include one or more of the following: the information on whether the first cell is allowed to be accessed, and the information on whether the first cell is an NSA cell.

[0120] Exemplarily, the MIB may include information required to read SIB1 (such as bandwidth information).

[0121] S330, the terminal device sends the relevant information of the first cell to the first access network device. Correspondingly, the first access network device receives the relevant information of the first cell sent by the terminal device.

[0122] Exemplarily, the relevant information of the first cell may be sent in the form of a measurement report (MR). Or sent in the form of a random access (RACH) report, or may also be sent in the form of a connection failure report (such as specifically connectionestablishreport or connestfailreport), or may also be sent in the form of a radio link failure report, or may also be sent in the form of a log measurement report, or may also be sent in the form of a mobility history report, or may also be a new report sent through a newly defined message. Exemplarily, the relevant information of the first cell may be sent through any one of an RRC message, a Medium Access Control (MAC) control message, a physical layer message, or a newly defined message.

[0123] After receiving the relevant information of the first cell, the first access network device may perform cell handover according to the relevant information of the first cell.

[0124] Therefore, according to the method provided in this application, in a scenario where the first access network device and the second access network device cannot communicate, the terminal device can obtain and provide the relevant information of the first cell corresponding to the second access network device to the first access network device, so that the first access network device can perform cell handover according to the relevant information of the first cell.

[0125] Optionally, the method 300 may further include one or more steps of S340 to S400.

[0126] S340, the first access network device determines whether the terminal device can switch to the first cell according to one or more of the above relevant information of the first cell.

[0127] For example, if the information indicating whether the first cell is allowed to access indicates that access to the first cell is prohibited, or if the first cell is an NSA cell, the first access network device determines that the terminal device cannot switch to the first cell.

[0128] For another example, the first access network device determines whether the terminal device can be switched to the first cell according to the bandwidth and SCS supported by the terminal device and the bandwidth and SCS supported by the first cell. For example, if the bandwidth supported by the first cell is 30M and the SCS is 30K, and the bandwidth supported by the terminal device is 40M and the SCS is 30K, then the first access network device determines that the terminal device cannot be switched to the first cell.

[0129] In one example, the first access network device determines whether the terminal device supports accessing the initial BWP according to the information of the initial BWP. If not, it cannot be switched to the first cell. Specifically, it can be determined whether the terminal device supports the SCS information corresponding to the initial BWP. If not, it cannot be switched to the first cell.

[0130] Optionally, the first access network device determines the initial BWP according to the boundary information of the first cell and the information of the initial BWP.

[0131] In one example, if the first cell is allowed to be accessed or the first cell is not an NSA cell, and the bandwidth and SCS supported by the first cell match the bandwidth and SCS supported by the terminal device, the first access network device determines that the terminal device can access the first cell. The bandwidth and SCS supported by the first cell matching the bandwidth and SCS supported by the terminal device can be, for example, that the bandwidth supported by the first cell is greater than or equal to the bandwidth supported by the terminal device, and the SCS supported by the first cell is the same as the SCS supported by the terminal device.

[0132] In one example, if the information on whether the first cell is suitable for access is that the terminal device does not support accessing the first cell, the first access network device determines that the terminal device cannot be switched to the first cell.

[0133] S350, if the first access network device determines that the terminal device can be switched to the first cell, the first access network device sends a handover request message (hereinafter referred to as: the first handover request message) to the core network device. The first handover request message is used to request to switch the terminal device to the first cell, and the first handover request message includes the identifier of the second access network device.

[0134] Exemplarily, the identifier of the second access network device can be determined by the terminal device according to the identifier of the first cell and the bit information of the identifier of the second access network device in the cell identifier of the first cell. As described in S320, the relevant information of the first cell may include the bit information of the identifier of the second access network device in the cell identifier of the first cell. Alternatively, the bit information of the identifier of the second access network device in the cell identifier of the first cell may also be specified by the protocol or pre-configured.

[0135] Optionally, the first handover request message may further include the PLMN information of the first cell and / or the TAC information of the first cell. The PLMN information of the first cell and / or the TAC information of the first cell are used by the core network device to find the corresponding access network device, i.e., the second access network device.

[0136] At S360, the core network device sends a handover request message (hereinafter denoted as: the second handover request message) to the second access network device.

[0137] At S370, the second access network device sends a handover confirmation message to the core network device.

[0138] After receiving the first handover request message sent by the first access network device, the core network device sends a second handover request message to the second access network device according to the identifier of the second access network device, requesting to hand over the terminal device to the second cell. If the second access network device allows the handover, it sends a handover confirmation message to the core network device.

[0139] At S380, the core network device sends a handover command (hereinafter denoted as: the first handover command) to the first access network device.

[0140] At S390, the first access network device sends a handover command (hereinafter denoted as: the second handover command) to the terminal device according to the first handover command.

[0141] At S400, the terminal device switches to the first cell according to the second handover command.

[0142] After receiving the handover confirmation message sent by the second access network device, the core network device sends the first handover command to the first access network device. The first access network device sends the second handover command to the terminal according to the first handover command, and the terminal device switches to the first cell or switches to the second access network device according to the second handover command.

[0143] Optionally, the second handover command may be an RRC connection reconfiguration message, but this application does not limit this.

[0144] In summary, according to the method provided by this application, in a scenario where the first access network device and the second access network device cannot communicate, the terminal device obtains and provides the relevant information of the first cell corresponding to the second access network device to the first access network device, and the first access network device can perform cell handover based on the core network according to the relevant information of the first cell.

[0145] It should be understood that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not imply the order of execution, and the order of execution of each process should be determined according to its function and internal logic. The various numerical numbers or serial numbers involved in the above processes are only for the convenience of description and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0146] Above, the method provided by the embodiments of the present application has been described in detail. Below, in combination with Figure 3 the above, the method provided by the embodiments of the present application has been described in detail. Below, in combination with Figures 4 to 6 the following, the device provided by the embodiments of the present application will be described in detail.

[0147] Figure 4 is a schematic block diagram of a communication device provided by an embodiment of the present application. As Figure 4 shown, the communication device 1000 may include a transceiver unit 1100 and a processing unit 1200.

[0148] Among them, the transceiver unit 1100 may be used to receive information sent by other devices, and may also be used to send information to other devices. For example, send or receive relevant information of the first cell. The processing unit 1200 may be used to perform some processing of the device.

[0149] In a possible design, the communication device 1000 may correspond to the terminal device in the above method 300. For example, the communication device 1000 may be a terminal device or a chip configured in a terminal device. The communication device 1000 may include units for performing the operations performed by the terminal device in the method, and each unit in the communication device 1000 is respectively for implementing the operations performed by the terminal device in the method.

[0150] Specifically, the transceiver unit 1100 is configured to receive a first request message sent by a first access network device, where the first request message is used to request the transceiver unit to report relevant information of a first cell corresponding to a physical cell identifier (PCI);

[0151] The processing unit 1200 is configured to obtain relevant information of the first cell according to the first request message, where the relevant information of the first cell includes subcarrier spacing (SCS) information of the first cell and bandwidth information of the first cell; the transceiver unit 1100 is further configured to send the relevant information of the first cell to the first access network device.

[0152] Optionally, the processing unit 1200 is specifically configured to: read the system broadcast message of the first cell according to the first request message, where the system broadcast message includes the relevant information of the first cell.

[0153] Optionally, the transceiver unit 1100 is further configured to: send a second request message to a second access network device according to the first request message, where the second access network device is the access network device corresponding to the first cell, and the second request message is used to request the second access network device to send a system broadcast message.

[0154] Optionally, the related information of the first cell further includes one or more of the following: the cell identifier of the first cell, the information on whether the first cell is allowed to access, the information on whether the first cell is a non-access stratum (NSA) cell, the public land mobile network (PLMN) information of the first cell, the tracking area code (TAC) information of the first cell, the boundary information of the first cell, the bit information of the identifier of the second access network device in the cell identifier of the first cell; where the second access network device is the access network device corresponding to the first cell, and the bit information is used to determine the identifier of the second access network device.

[0155] Optionally, the boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

[0156] Optionally, the subcarrier spacing (SCS) information of the first cell corresponds to the bandwidth information of the first cell.

[0157] Optionally, the SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

[0158] Optionally, the transceiver unit 1100 is further configured to: send a physical cell identifier (PCI) to the first access network device.

[0159] It should be understood that the operations performed by the above processing unit 1200 can also be performed by the transceiver unit 1100.

[0160] In another possible design, the communication device 1000 may correspond to the first access network device in the above method 300, for example, it may be the first access network device or configure the chip in the first access network device. The communication device 1000 may include units for performing the operations performed by the first access network device in the method, and each unit in the communication device 1000 is respectively for implementing the operations performed by the first access network device in the method.

[0161] Specifically, the transceiver unit 1100 is configured to send a first request message to a terminal device, where the first request message is used to request the terminal device to report the related information of the first cell corresponding to the physical cell identifier (PCI); the transceiver unit 1100 is further configured to receive the related information of the first cell sent by the terminal device, and the related information of the first cell includes the subcarrier spacing (SCS) information and the bandwidth information of the first cell.

[0162] Optionally, the relevant information of the first cell is obtained by the terminal device by reading the system broadcast message of the first cell.

[0163] Optionally, the relevant information of the first cell includes one or more of the following information: the cell identifier of the first cell, the information on whether the first cell is allowed to access, the information on whether the first cell is an NSA cell, the PLMN information of the first cell, the TAC information of the first cell, the boundary information of the first cell, the bit information of the identifier of the second access network device in the cell identifier of the first cell; wherein, the second access network device is the access network device corresponding to the first cell, and the bit information is used to determine the identifier of the second access network device.

[0164] Optionally, the boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

[0165] Optionally, the processing unit 1200 is configured to determine whether the terminal device can switch to the first cell according to one or more of the following information: the information on whether the first cell is allowed to access, the information on whether the first cell is an NSA cell, the bandwidth information of the first cell, and the SCS information of the first cell; if the terminal device can switch to the first cell, the transceiver unit 1100 is further configured to send a handover request message to the core network device, and the handover request message is used to request to switch the terminal device to the first cell, and the handover request message includes the identifier of the second access network device.

[0166] Optionally, the handover request message further includes the PLMN information of the first cell and / or the TAC information of the first cell.

[0167] Optionally, the transceiver unit 1100 is further configured to receive a handover command sent by the core network device; the processing unit 1200 is further configured to send a second handover command to the terminal device according to the first handover command to switch the terminal device to the first cell.

[0168] Optionally, the SCS information of the first cell corresponds to the bandwidth information of the first cell.

[0169] Optionally, the SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

[0170] It should be understood that the specific processes of the respective units performing the above corresponding steps have been described in detail in the above method embodiments, and for the sake of brevity, they will not be repeated here.

[0171] It should also be understood that when the communication device 1000 is a terminal device, the transceiver unit 1100 in the communication device 1000 may correspond to Figure 5The transceiver 2020 in the terminal device 2000 shown in the figure, the processing unit 1200 in the communication device 1000 may correspond to Figure 5 the processor 2010 in the terminal device 2000 shown in the figure.

[0172] It should also be understood that when the communication device 1000 is a chip configured in a terminal device, the transceiver unit 1200 in the communication device 1000 may be an input / output interface.

[0173] It should also be understood that when the communication device 1000 is a first access network device, the transceiver unit 1100 in the communication device 1000 may correspond to Figure 6 the transceiver 3200 in the network device 3000 shown in the figure, and the processing unit 1200 in the communication device 1000 may correspond to Figure 6 the processor 3100 in the network device 3000 shown in the figure.

[0174] It should also be understood that when the communication device 1000 is a chip configured in a first access network device, the transceiver unit 1100 in the communication device 1000 may be an input / output interface.

[0175] Figure 5 is a schematic structural diagram of the terminal device 2000 provided by an embodiment of the present application. The terminal device 2000 can be applied to, for example, Figure 1 the system shown in the figure, and execute the functions of the terminal device in the above method embodiment. As shown in Figure 5 the figure, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further includes a memory 2030. Among them, the processor 2010, the transceiver 2002, and the memory 2030 can communicate with each other through an internal connection path to transmit control or data signals. The memory 2030 is used to store computer programs, and the processor 2010 is used to call and run the computer programs from the memory 2030 to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040, which is used to send the uplink data or uplink control signaling output by the transceiver 2020 through a wireless signal.

[0176] The above-mentioned processor 2010 and the memory 2030 may be integrated into a processing device. The processor 2010 is used to execute the program code stored in the memory 2030 to implement the above functions. Specifically, the memory 2030 may also be integrated in the processor 2010 or independent of the processor 2010. The processor 2010 may correspond to Figure 4 the processing unit 1200 in the figure.

[0177] The above-mentioned transceiver 2020 may correspond to Figure 4corresponds to the transceiver unit 1100 therein. The transceiver 2020 may include a receiver (or a receiver circuit) and a transmitter (or a transmitter circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

[0178] It should be understood that Figure 5 The terminal device 2000 shown can implement each process related to the terminal device in the method 300. The operations or functions of each module in the terminal device 2000 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments. To avoid repetition, the detailed description is appropriately omitted here.

[0179] The above-mentioned processor 2010 can be used to execute the actions implemented inside the terminal device described in the previous method embodiments, and the transceiver 2020 can be used to execute the actions of the terminal device sending to or receiving from the network device described in the previous method embodiments. For details, please refer to the description in the previous method embodiments and will not be elaborated here.

[0180] Optionally, the above-mentioned terminal device 2000 may further include a power supply 2050 for supplying power to various devices or circuits in the terminal device.

[0181] In addition, in order to make the functions of the terminal device more complete, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, and a sensor 2100, etc. The audio circuit may further include a speaker 2082, a microphone 2084, etc.

[0182] Figure 6 is a schematic structural diagram of a network device provided by an embodiment of the present application, for example, it may be a schematic structural diagram of a base station. The base station 3000 can be applied to a system such as Figure 1 shown, and execute the functions of the first access network device in the above method embodiments. As shown in the figure, the base station 3000 may include one or more radio frequency units, such as a remote radio unit (RRU) 3100 and one or more baseband units (BBUs) (which may also be referred to as distributed units (DUs)) 3200. The RRU 3100 may be referred to as a transceiver unit or a communication unit, and is related to Figure 4corresponds to the transceiver unit 1100 in []. Optionally, the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 3101 and a radio frequency unit 3102. Optionally, the transceiver unit 3100 may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or a receiver, a receiving circuit), and the transmitting unit may correspond to a transmitter (or a transmitter, a transmitting circuit). The RRU 3100 part is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals. The BBU 3200 part is mainly used for baseband processing and controlling the base station, etc. The RRU 3100 and the BBU 3200 may be physically set together or physically separated, that is, a distributed base station.

[0183] The BBU 3200 is the control center of the base station and may also be referred to as a processing unit, and can communicate with Figure 4 the processing unit 1200 in []. It is mainly used to complete baseband processing functions such as channel coding, multiplexing, modulation, spreading, etc. For example, the BBU (processing unit) can be used to control the base station to execute the operation process of the network device in the above method embodiments.

[0184] In one example, the BBU 3200 may be composed of one or more single boards. The multiple single boards can jointly support a radio access network of a single access mode (such as an LTE network), or can respectively support radio access networks of different access modes (such as an LTE network, a 5G network or other networks). The BBU 3200 further includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation process of the first access network device in the above method embodiments. The memory 3201 and the processor 3202 can serve one or more single boards. That is to say, a memory and a processor can be separately set on each single board. It can also be that multiple single boards share the same memory and processor. In addition, necessary circuits can be set on each single board.

[0185] It should be understood that Figure 6 the base station 3000 shown can implement each process related to the first access network device in the foregoing method embodiments. The operations or functions of each module in the base station 3000 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments. To avoid repetition, the detailed description is appropriately omitted here.

[0186] The foregoing BBU 3200 can be used to perform the actions implemented inside the first access network device described in the foregoing method embodiments, while the RRU 3100 can be used to perform the actions of sending to or receiving from the terminal device by the first access network device described in the foregoing method embodiments. For specific details, please refer to the descriptions in the foregoing method embodiments and will not be elaborated herein.

[0187] According to the method provided by the embodiments of the present application, the present application further provides a computer program product, which includes: computer program code. When the computer program code runs on a computer, it causes the computer to execute the method on the terminal device side or the access network device side in the foregoing method embodiments.

[0188] According to the method provided by the embodiments of the present application, the present application further provides a computer-readable medium, which stores program code. When the program code runs on a computer, it causes the computer to execute the method on the terminal device side or the first access network device side in the foregoing method embodiments.

[0189] According to the method provided by the embodiments of the present application, the present application further provides a system, which includes the foregoing first access network device, second access network device, and core network device. Optionally, the system may further include the foregoing terminal device.

[0190] The embodiments of the present application further provide a processing device, which includes a processor and an interface; the processor is used to execute the method in the foregoing method embodiments.

[0191] It should be understood that the above processing device may be a chip. For example, the processing device may be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It may also be a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), a micro controller unit (MCU), a programmable logic device (PLD), or other integrated chips. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0192] It will be appreciated that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and directrambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0193] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can 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. When the computer instructions are loaded and 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. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as high-density digital video discs (DVDs)), or semiconductor media (such as solid state discs (SSDs)), etc.

[0194] In each of the above device embodiments, the network device corresponds exactly to the network device or terminal device in the method embodiments, and the corresponding steps are executed by the corresponding modules or units. For example, the communication unit (transceiver) executes the steps of receiving or sending in the method embodiments, and other steps except for sending and receiving can be executed by the processing unit (processor). The functions of the specific units can be referred to the corresponding method embodiments. Among them, the processor may be one or more.

[0195] As used in this specification, the terms "component", "module", "system", etc. are used to denote computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable, an execution thread, a program, or a computer. By way of illustration, an application running on a computing device and the computing device can both be components. One or more components can reside in a process or execution thread, and a component can be located on one computer or distributed between two or more computers. In addition, these components can execute from various computer-readable media that store various data structures. A component can communicate, for example, through a signal with one or more data packets (e.g., data from two components interacting with another component in a local system, a distributed system, or a network, e.g., the Internet interacting with other systems through a signal) through local or remote processes.

[0196] It should be understood that the "embodiments" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0197] It should be understood that in the embodiments of the present application, the numbers "first", "second",... are only used to distinguish different objects, such as to distinguish different network devices, and do not limit the scope of the embodiments of the present application. The embodiments of the present application are not limited thereto.

[0198] It should also be understood that in the present application, "when", "if", and "in case" all mean that the network element will perform corresponding processing under certain objective circumstances, and do not limit time. Moreover, it is not required that the network element must have a judgment action when implemented, nor does it mean that there are other limitations.

[0199] It should also be understood that in the present application, "at least one" means one or more, and "a plurality" means two or more.

[0200] It should also be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0201] It should also be understood that the term "and / or" herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0202] In this application, the meaning of expressions similar to "the item includes one or more of the following: A, B, and C", unless otherwise specified, generally means that the item can be any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C; A and A; A, A, and A; A, A, and B; A, A, and C; A, B, and B; A, C, and C; B and B, B, B, and B, B, B, and C, C and C; C, C, and C, and other combinations of A, B, and C. The above takes three elements A, B, and C as examples to illustrate the selectable items of this item. When expressed as "the item includes at least one of the following: A, B,..., and X", that is, when there are more elements in the expression, the items applicable to this item can also be obtained according to the foregoing rules.

[0203] It can be understood that in the embodiments of this application, the terminal device and / or the network device can execute some or all of the steps in the embodiments of this application. These steps or operations are only examples, and the embodiments of this application can also execute other operations or various deformations of the operations. In addition, each step can be executed in a different order presented in the embodiments of this application, and it is possible not to execute all the operations in the embodiments of this application.

[0204] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0205] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0206] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods 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 can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0207] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or 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.

[0208] In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, may exist physically separately for each unit, or two or more units may be integrated in one unit.

[0209] If the above function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory ROM, random access memory RAM, magnetic disks, or optical discs that can store program codes.

[0210] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A communication method, characterized in that, Including: The terminal device receives a first request message sent by a first access network device, where the first request message is used to request the terminal device to report information related to a first cell corresponding to a physical cell identifier (PCI). At least one of the first access network device and a second access network device does not support the Xn interface, and the second access network device is the access network device corresponding to the first cell; The terminal device obtains the information related to the first cell according to the first request message, where the information related to the first cell is used to determine whether the terminal device can switch to the first cell. The information related to the first cell includes the subcarrier spacing (SCS) information of the first cell and the bandwidth information of the first cell; The information related to the first cell further includes one or more of the following: The cell identifier of the first cell, the information indicating whether the first cell is allowed to be accessed, the information indicating whether the first cell is a non-access stratum (NSA) cell, the public land mobile network (PLMN) information of the first cell, the tracking area code (TAC) information of the first cell, the boundary information of the first cell, and the bit information occupied by the identifier of the second access network device in the cell identifier of the first cell; where the bit information is used to determine the identifier of the second access network device; The terminal device sends the information related to the first cell to the first access network device.

2. The method according to claim 1, characterized in that, The terminal device obtains the information related to the first cell according to the first request message, including: The terminal device reads the system broadcast message of the first cell according to the first request message, and the system broadcast message includes the information related to the first cell.

3. The method according to claim 2, wherein Before the terminal device reads the system broadcast message of the first cell according to the first request message, the method further includes: The terminal device sends a second request message to the second access network device according to the first request message, where the second access network device is the access network device corresponding to the first cell, and the second request message is used to request the second access network device to send the system broadcast message.

4. The method according to claim 1, characterized in that The boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

5. The method according to claim 1, characterized in that, The SCS information of the first cell corresponds to the bandwidth information of the first cell.

6. The method according to claim 1, wherein The SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

7. The method according to any one of claims 1 to 6, characterized in that, Before the terminal device receives the first request message sent by the first access network device, the method further includes: The terminal device sends the PCI to the first access network device.

8. A communication method, characterized in that Including: The first access network device sends a first request message to the terminal device, where the first request message is used to request the terminal device to report information related to a first cell corresponding to a physical cell identifier (PCI). At least one of the first access network device and a second access network device does not support the Xn interface, and the second access network device is the access network device corresponding to the first cell; The first access network device receives the relevant information of the first cell sent by the terminal device, where the relevant information of the first cell includes the subcarrier spacing (SCS) information of the first cell and the bandwidth information of the first cell; The relevant information of the first cell includes one or more of the following information: The cell identifier of the first cell, the information on whether the first cell is allowed to be accessed, the information on whether the first cell is a non-access stratum (NSA) cell, the public land mobile network (PLMN) information of the first cell, the tracking area code (TAC) information of the first cell, the boundary information of the first cell, and the bit information of the identifier of the second access network device in the cell identifier of the first cell; wherein, the bit information is used to determine the identifier of the second access network device; The first access network device determines whether the terminal device can be switched to the first cell according to the relevant information of the first cell.

9. The method according to claim 8, characterized in that, The relevant information of the first cell is obtained by the terminal device by reading the system broadcast message of the first cell.

10. The method according to claim 8, wherein The boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

11. The method according to claim 8, characterized in that, The method further includes: The first access network device determines whether the terminal device can be switched to the first cell according to one or more of the following information: the information on whether the first cell is allowed to be accessed, the information on whether the first cell is an NSA cell, the bandwidth information of the first cell, and the SCS information of the first cell; If the terminal device can be switched to the first cell, the first access network device sends a handover request message to the core network device, where the handover request message is used to request to switch the terminal device to the first cell, and the handover request message includes the identifier of the second access network device.

12. The method according to claim 11, wherein The handover request message further includes the PLMN information of the first cell and / or the TAC information of the first cell.

13. The method according to claim 11, wherein The method further includes: The first access network device receives a first handover command sent by the core network device; The first access network device sends a second handover command to the terminal device according to the first handover command to switch the terminal device to the first cell.

14. The method according to claim 8, wherein The SCS information of the first cell corresponds to the bandwidth information of the first cell.

15. The method according to any one of claims 8 to 14, characterized in that The SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

16. A communication device, characterized in that, It includes: A transceiver unit, configured to receive a first request message sent by a first access network device, where the first request message is used to request the transceiver unit to report the relevant information of the first cell corresponding to the physical cell identifier (PCI), at least one of the first access network device and the second access network device does not support the Xn interface, and the second access network device is the access network device corresponding to the first cell; A processing unit, configured to obtain information related to the first cell according to the first request message, where the information related to the first cell is used to determine whether the device can switch to the first cell, and the information related to the first cell includes subcarrier spacing (SCS) information of the first cell and bandwidth information of the first cell; The information related to the first cell includes one or more of the following information: The cell identifier of the first cell, information on whether the first cell is allowed to be accessed, information on whether the first cell is a non-access stratum (NSA) cell, public land mobile network (PLMN) information of the first cell, tracking area code (TAC) information of the first cell, boundary information of the first cell, and bit information of the identifier of the second access network device in the cell identifier of the first cell; wherein, the bit information is used to determine the identifier of the second access network device; The transceiver unit is further configured to send the information related to the first cell to the first access network device.

17. The device according to claim 16, characterized in that, Specifically, the processing unit is configured to: Read the system broadcast message of the first cell according to the first request message, where the system broadcast message includes the information related to the first cell.

18. The device according to claim 17, characterized in that, The transceiver unit is further configured to: Send a second request message to a second access network device according to the first request message, where the second access network device is the access network device corresponding to the first cell, and the second request message is used to request the second access network device to send the system broadcast message.

19. The device according to claim 16, characterized in that, The boundary information of the first cell includes absolute frequency point information of a reference resource block, or includes absolute frequency point information of a reference resource block and offset value information.

20. The device according to claim 16, characterized in that, The SCS information of the first cell corresponds to the bandwidth information of the first cell.

21. The device according to claim 16, characterized in that, The SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

22. The device according to any one of claims 16 to 21, characterized in that, The transceiver unit is further configured to: Send the PCI to the first access network device.

23. A communication device, characterized in that, Comprising: A transceiver unit, configured to send a first request message to a terminal device, where the first request message is used to request the terminal device to report information related to a first cell corresponding to a physical cell identifier (PCI), at least one of the communication device and the second access network device does not support the Xn interface, and the second access network device is the access network device corresponding to the first cell; The transceiver unit is further configured to receive the information related to the first cell sent by the terminal device, where the information related to the first cell includes subcarrier spacing (SCS) information of the first cell and bandwidth information of the first cell; The information related to the first cell includes one or more of the following information: The cell identifier of the first cell, information on whether the first cell is allowed to be accessed, information on whether the first cell is a non-access stratum (NSA) cell, the public land mobile network (PLMN) information of the first cell, the tracking area code (TAC) information of the first cell, the boundary information of the first cell, and the bit information of the identifier of the second access network device in the cell identifier of the first cell; wherein the bit information is used to determine the identifier of the second access network device. A processing unit, configured to determine whether the terminal device can be switched to the first cell according to the relevant information of the first cell.

24. The device according to claim 23, wherein, The relevant information of the first cell is obtained by the terminal device by reading the system broadcast message of the first cell.

25. The device according to claim 23, characterized in that The boundary information of the first cell includes the absolute frequency point information of the reference resource block, or includes the absolute frequency point information of the reference resource block and the offset value information.

26. The device according to claim 23, wherein The processing unit is further configured to determine whether the terminal device can be switched to the first cell according to one or more of the following information: information on whether the first cell is allowed to be accessed, information on whether the first cell is an NSA cell, the bandwidth information of the first cell, and the subcarrier spacing (SCS) information of the first cell. If the terminal device can be switched to the first cell, the transceiver unit is further configured to send a handover request message to the core network device, where the handover request message is used to request to switch the terminal device to the first cell, and the handover request message includes the identifier of the second access network device.

27. The device according to claim 26, wherein The handover request message further includes the PLMN information of the first cell and / or the TAC information of the first cell.

28. The device according to claim 26, wherein The transceiver unit is further configured to receive a first handover command sent by the core network device. The processing unit is further configured to send a second handover command to the terminal device according to the first handover command to switch the terminal device to the first cell.

29. The device according to claim 23, characterized in that, The SCS information of the first cell corresponds to the bandwidth information of the first cell.

30. The device according to any one of claims 23 to 29, characterized in that, The SCS information of the first cell includes one or more SCS information, and the bandwidth information of the first cell includes one or more bandwidth information.

31. A communication device, characterized in that, Comprising: A processor, configured to execute computer instructions stored in a memory, so that the device executes the method according to any one of claims 1 to 7.

32. A communication device, characterized in that, Comprising: A processor, configured to execute computer instructions stored in a memory, so that the device executes the method according to any one of claims 8 to 15.

33. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instruction is executed, the computer is caused to execute the method according to any one of claims 1 to 15.

34. A computer program product, characterized in that, Including computer program instructions, which cause the computer to execute: the method according to any one of claims 1 to 15.

35. A communication system, characterized in that, The communication system includes the device according to any one of claims 16 to 22 and the device according to any one of claims 23 to 30, or includes the device according to claims 31 and 32.

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