Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method comprising: a service base station sending a first indication message, the first indication message being used for indicating that a cell does not allow an MSS terminal to access, or a frequency band corresponding to the cell does not allow the MSS terminal to access. According to the method provided by the invention, when the frequency band corresponding to the FSS terminal is multiplexed by the MSS terminal, in order to avoid the MSS access in the frequency band which is not allowed, the service base station serving the FSS terminal can send the first indication information to the MSS terminal, and the first indication information can indicate that the cell or the frequency band corresponding to the current service base station does not allow the MSS terminal to access. According to the embodiment of the invention, the MSS terminal can refuse to access the cell based on the first indication information, so that the problem that the MSS terminal may access the unallowed frequency band when the frequency band corresponding to the FSS terminal is multiplexed to the MSS terminal in the related technology is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Art

[0002] With the development of information technology, more urgent requirements are put forward for the efficiency, mobility and diversity of communication. At present, satellites play an irreplaceable role in some important fields, such as space communication, aviation communication, military communication, etc. Satellite communication has the characteristics of long communication distance, large coverage area and flexible networking. Among them, satellite services are divided into fixed satellite service (FSS) and mobile satellite service (MSS), which can provide services for both fixed terminals and various mobile terminals.

[0003] The two types of services, FSS and MSS, correspond to two types of terminals (i.e., MSS terminals and FSS terminals) using different frequencies. In order to improve spectrum utilization, the FSS frequency band can be reused for MSS terminals, but in general, MSS terminals can only access part of the frequency band. Therefore, when the MSS terminal reuses the FSS frequency band, it may access an unauthorized frequency band, thereby reducing the success rate of the MSS terminal accessing the cell. Summary of the invention

[0004] The present application provides a communication method and a communication device. In the method, a base station served by an FSS terminal sends first indication information to an MSS terminal to indicate whether the MSS terminal can access a cell served by the base station, thereby preventing the MSS terminal from accessing an unsupported frequency band.

[0005] In a first aspect, a communication method is provided. The method provided in the first aspect can be executed by a service base station or by a chip configured in the service base station, and the present application does not limit this.

[0006] Specifically, the method includes: the serving base station sends a first indication message, where the first indication message is used to indicate that the cell does not allow the MSS terminal to access, or the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0007] The communication method provided by the first aspect, when the frequency band corresponding to the FSS terminal is reused by the MSS terminal, in order to avoid the MSS from accessing the unauthorized frequency band, the service base station serving the FSS terminal can send a first indication message to the MSS terminal, and the first indication message can indicate that the cell or frequency band corresponding to the current service base station does not allow the MSS terminal to access, and the MSS terminal can refuse to access the cell based on the first indication message, thereby solving the problem in the related art that when the frequency band corresponding to the FSS terminal is reused by the MSS terminal, the MSS terminal may access the unauthorized frequency band.

[0008] Optionally, the MSS terminal is a movable terminal in a non-terrestrial network NTN, and the serving base station that sends the first indication information to the MSS terminal serves FSS terminals in the NTN.

[0009] Exemplarily, when taking the FSS available frequency band {A, B} as an example, the frequency band set A is dedicated to the FSS UE, and the frequency band set B is multiplexed for the MSS UE. Therefore, the FSS UE can access all frequency bands, while the MSS UE can only access some frequency points (i.e., the frequency band set B, and cannot access the frequency band set A). Therefore, the base station corresponding to the frequency band A serving the FSS terminal and the base station corresponding to the frequency band B serving the FSS terminal can send a first indication message to the MSS terminal, and the first indication message indicates the frequency band of the cell currently being served and whether the frequency band allows the MSS terminal to access. For example, the base station corresponding to the frequency band A serving the FSS terminal sends a first indication message to the MSS terminal, and the first indication message may indicate that the MSS terminal is not allowed to access, or may indicate that the frequency band of the cell corresponding to the base station is A, and the MSS terminal is not allowed to access. Then, after the MSS accesses the first indication message, it will not access the cell, thereby solving the problem that the MSS terminal may access the frequency band that is not allowed.

[0010] In a possible implementation manner of the first aspect, the first indication message is carried in MIB or SIB1.

[0011] In a possible implementation manner of the first aspect, the method further includes: the serving base station sends second indication information, where the second indication information is used to indicate other inter-frequency points and whether the inter-frequency points allow the MSS terminal to access.

[0012] In this implementation, when the serving base station does not allow the MSS terminal to access, the serving base station can also indicate other heterofrequency points to the MSS terminal, and whether the heterofrequency points allow the MSS terminal to access. The MSS terminal can perform measurements based on the indicated other heterofrequency points, instead of blindly selecting heterofrequency points during the cell reselection process, resulting in a low success rate in accessing the cell.

[0013] It should be noted that when the MSS terminal is in an idle state, the cell corresponding to the heterofrequency point may be that of a neighboring base station or that of the serving base station, and this embodiment of the present application does not specifically limit this.

[0014] In a possible implementation manner of the first aspect, the second message is carried in SIB4.

[0015] In a second aspect, a communication method is provided. The method provided in the second aspect can be executed by an MSS terminal or by a chip configured in the MSS terminal, and this application does not limit this.

[0016] Specifically, the method includes: the MSS terminal receives first indication information, the first indication information is used to indicate that the cell does not allow the MSS terminal to access, or the frequency band corresponding to the cell does not allow the MSS terminal to access. The MSS terminal refuses to access the cell corresponding to the serving base station based on the first indication information.

[0017] The second aspect provides a communication method. When an MSS terminal reuses a frequency band used by an FSS terminal, in order to avoid accessing an unauthorized frequency band, the MSS terminal receives a first indication message sent by the FSS terminal. The first indication message may indicate that the cell or frequency band corresponding to the current serving base station does not allow the MSS terminal to access. The MSS terminal may refuse to access the cell based on the first indication message, thereby solving the problem in the related art that when the frequency band corresponding to the FSS terminal is reused by the MSS terminal, the MSS terminal may access an unauthorized frequency band.

[0018] Optionally, the MSS terminal is a movable terminal in a non-terrestrial network NTN.

[0019] Optionally, after receiving the first indication information, the MSS terminal will ignore the existing cellbar indication in the MIB, or the existing cellBarredNTN.

[0020] In a possible implementation manner of the second aspect, the first indication information is carried in SIB1 or MIB.

[0021] In a possible implementation of the second aspect, the method further includes: the MSS terminal receives second indication information, the second indication information is used to indicate other inter-frequency points and whether the inter-frequency points allow the MSS terminal to access. The MSS terminal performs inter-frequency point measurement according to the second indication information.

[0022] In this implementation, the MSS terminal can perform measurements based on other indicated inter-frequency points, rather than blindly selecting an inter-frequency during cell reselection, which results in a low success rate of accessing the cell.

[0023] In a possible implementation manner of the second aspect, the second indication message is carried in SIB4.

[0024] In a third aspect, a communication method is provided. The method provided in the third aspect can be executed by a service base station or by a chip configured in the service base station, and this application does not limit this.

[0025] Specifically, the method includes: the serving base station obtains the frequency point information of the neighboring base station and the information of the terminal device, the frequency point information includes: the frequency point and whether the frequency point allows the MSS terminal to access, the terminal device information includes type information and service information, and the type information includes MSS terminals and FSS terminals. The serving base station sends a measurement configuration to the terminal device according to the frequency point information of the neighboring base station and the information of the terminal device, and the frequency point in the measurement configuration is the frequency point that the MSS terminal is allowed to access.

[0026] The communication method provided by the third aspect is that the service base station can determine the frequency that the MSS terminal can access based on the acquired frequency information of the neighboring base station and the service information of the terminal device, so that the measurement frequency in the measurement configuration sent by the service base station to the MSS terminal is the frequency that the MSS terminal is allowed to access, which solves the problem in the related art that the MSS terminal may access an unsupported frequency.

[0027] In a possible implementation manner of the third aspect, the serving base station obtains the frequency information of the neighboring base station, including: receiving an Xn message sent by the neighboring base station, the message carrying the frequency information of the neighboring base station, and the Xn message including any one of an Xn establishment message and an NG-RAN node configuration update message.

[0028] In a possible implementation manner of the third aspect, obtaining the type information of the terminal device includes: receiving user auxiliary information sent by the terminal device, where the user auxiliary information indicates the type information of the terminal device.

[0029] In a possible implementation manner of the third aspect, obtaining the type information of the terminal device includes: receiving capability reporting information of the terminal device, where the capability reporting information indicates the type information of the terminal device.

[0030] In a possible implementation manner of the third aspect, obtaining the service information of the terminal device includes: obtaining contract information sent by a mobility management function AMF, wherein the contract information indicates the service information of the terminal device.

[0031] In a fourth aspect, a communication method is provided. The method provided in the fourth aspect can be executed by a target base station or by a chip configured in the target base station, and this application does not limit this.

[0032] Specifically, the method includes: the target base station receives a switching request sent by a source base station, the switching request carries information of a terminal device, the information of the terminal device includes category information and service information, the category information includes an MSS terminal and an FSS terminal; the target base station determines whether to allow access to the MSS terminal based on the frequency information of the current cell and the information of the terminal device; the target base station sends a switching request feedback message to the source base station, the switching request message includes: allowing access to the MSS terminal or not allowing access to the MSS terminal.

[0033] The communication method provided in the fourth aspect is that, after receiving the information of the terminal equipment carried by the source base station and the frequency information of the current cell, the target base station can determine whether the frequency information corresponding to the current cell allows the MSS terminal to access. If the MSS terminal is allowed to access, it will feedback to the source base station that access is allowed; if the MSS terminal is not allowed to access, it will feedback to the source base station that access is not allowed. This method can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0034] In an implementation manner of the fourth aspect, the target base station may obtain the type information of the terminal device by receiving user auxiliary information sent by the terminal device, where the user auxiliary information indicates the type information of the terminal device.

[0035] In a possible implementation manner of the fourth aspect, the target base station may obtain the type information of the terminal device by receiving capability reporting information of the terminal device, where the capability reporting information indicates the type information of the terminal device.

[0036] In a possible implementation manner of the fourth aspect, the target base station can obtain the service information of the terminal device by obtaining the contract information sent by the mobility management function AMF, where the contract information indicates the service information of the terminal device.

[0037] In a fifth aspect, a communication method is provided, which is applied to a source base station, and the method includes: the source base station sends a switching request message to at least one target base station, and the switching request message carries frequency query information, and the frequency query information includes: querying the frequency of the current cell corresponding to the target base station and whether the frequency allows MSS terminal access; receiving a switching request feedback message sent by at least one target base station, the switching request feedback message carries frequency feedback information, and the frequency feedback information includes the frequency of the current cell corresponding to at least one target base station and whether the frequency allows MSS terminal access; determining the target switching cell based on at least one frequency feedback information and information of the terminal device, and the frequency corresponding to the target switching cell supports terminal device access.

[0038] In the communication method provided in the fifth aspect, after the source base station obtains the frequency of the current cell fed back by at least one target base station and the information whether the frequency allows the MSS terminal to access, the source base station determines the target switching cell from at least one target base station according to the information of the terminal device, and the frequency corresponding to the target switching cell allows the MSS terminal to access. In this method, the judgment based on the source base station can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0039] In an implementation manner of the fifth aspect, the source base station may obtain the type information of the terminal device by receiving user auxiliary information sent by the terminal device, where the user auxiliary information indicates the type information of the terminal device.

[0040] In a possible implementation manner of the fifth aspect, the source base station may obtain the type information of the terminal device by receiving capability reporting information of the terminal device, where the capability reporting information indicates the type information of the terminal device.

[0041] In a possible implementation of the fifth aspect, the source base station may obtain the service information of the terminal device by obtaining the contract information sent by the mobility management function AMF, where the contract information indicates the service information of the terminal device.

[0042] In a sixth aspect, a communication method is provided, which is applied to a target base station, and the method includes: receiving a switching request message sent by a source base station, the switching request message carries frequency query information, and the frequency query information includes: querying the frequency of the current cell corresponding to the target base station and whether the frequency allows MSS terminals to access; based on the switching request message, sending switching request feedback information to the source base station, the switching request feedback information carries frequency feedback information, the frequency feedback information includes the frequency of the current cell corresponding to at least one target base station and whether the frequency allows the MSS terminal to access; the frequency feedback information is used by the source base station to determine the target switching cell, and the frequency corresponding to the target switching cell supports MSS terminal access.

[0043] The communication method provided in the sixth aspect is that after receiving the frequency query information carried in the switching request message, the target base station can feedback the frequency of the current cell and whether the frequency allows the MSS terminal to access to the source base station, so that the source base station can determine the target switching cell from at least one target base station based on the service information and frequency feedback information of the terminal device, and the frequency corresponding to the target switching cell allows the MSS terminal to access. In this method, the judgment based on the source base station can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0044] In the seventh aspect, a communication system is provided, which includes a serving base station and an MSS terminal, wherein the serving base station is used to execute the method in the above first aspect or any possible implementation of the first aspect, and the MSS terminal is used to execute the method in the above second aspect or any possible implementation of the second aspect.

[0045] In the eighth aspect, a communication system is provided, which includes a source base station and a target base station, the source base station is used to execute the method in the fifth aspect or any possible implementation of the fifth aspect, and the target base station is used to execute the method in the sixth aspect or any possible implementation of the sixth aspect.

[0046] In the ninth aspect, a communication device is provided, which includes a unit for executing each step in the first aspect or any possible implementation of the first aspect, or a unit for executing each step in the second aspect or any possible implementation of the second aspect, or a unit for executing each step in the third aspect or any possible implementation of the third aspect, or a unit for executing each step in the fourth aspect or any possible implementation of the fourth aspect, or a unit for executing each step in the fifth aspect or any possible implementation of the fourth aspect, or a unit for executing each step in the sixth aspect.

[0047] In the tenth aspect, a communication device is provided, which includes at least one processor and a memory, the processor and the memory are coupled, the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect, or the method in the fifth aspect or any possible implementation of the fifth aspect, or the method in the sixth aspect is performed.

[0048] In the eleventh aspect, a communication device is provided, which includes at least one processor and an interface circuit, and the at least one processor is used to execute the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect, or the method in the fifth aspect or any possible implementation of the fifth aspect, or the method in the sixth aspect.

[0049] In the twelfth aspect, a computer program product is provided, which includes a computer program. When the computer program is executed by a processor, it is used to execute the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect, or the method in the fifth aspect or any possible implementation of the fifth aspect, or the method in the sixth aspect.

[0050] In the thirteenth aspect, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed, it is used to execute the method in the first aspect or any possible implementation of the first aspect, or the method in the second aspect or any possible implementation of the second aspect, or the method in the third aspect or any possible implementation of the third aspect, or the method in the fourth aspect or any possible implementation of the fourth aspect, or the method in the fifth aspect or any possible implementation of the fifth aspect, or the method in the sixth aspect.

[0051] In the fourteenth aspect, a chip is provided, comprising: a processor, for calling and running a computer program from a memory, so that a communication device equipped with the chip executes a method for executing the first aspect or any possible implementation of the first aspect, or the second aspect or any possible implementation of the second aspect, or the third aspect or any possible implementation of the third aspect, or the fourth aspect or any possible implementation of the fourth aspect, or the fifth aspect or any possible implementation of the fifth aspect, or the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic block diagram of a wireless communication system architecture suitable for the present application is shown.

[0053] Figure 2 A schematic interaction diagram of an example communication method 200 provided in an embodiment of the present application is shown.

[0054] Figure 3 A schematic diagram of a scenario of mobility management in a connected state is shown.

[0055] Figure 4 A schematic interaction diagram of another communication method 400 provided in an embodiment of the present application is shown.

[0056] Figure 5 A schematic interaction diagram of another communication method 500 provided in an embodiment of the present application is shown.

[0057] Figure 6 A schematic interaction diagram of another communication method 600 provided in an embodiment of the present application is shown.

[0058] Figure 7 A schematic block diagram of a communication device 700 provided in an embodiment of the present application is shown.

[0059] Figure 8 A schematic block diagram of another communication device 800 provided in an embodiment of the present application is shown.

[0060] Fig. 9 A schematic block diagram of a communication device 900 according to an embodiment of the present application is shown.

[0061] Fig.10 A schematic block diagram of another communication device 1000 provided in an embodiment of the present application is shown.

[0062] Fig.11 A schematic structural diagram of a terminal device 1100 provided in the present application is shown.

[0063] Fig.12 A schematic diagram of the structure of a network device 1200 provided in an embodiment of the present application is shown.

[0064] Fig.13 A schematic diagram of a chip system provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0066] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

[0067] Figure 1 is a schematic block diagram of a wireless communication system architecture applicable to the present application. Figure 1 As shown, the system architecture includes terminal devices, access network equipment, management equipment, gateway equipment and data network (DN). Figure 1The terminal device in the invention can be used to connect to the access network equipment deployed by the operator through the wireless air interface, and then connect to the data network through the gateway device; the access network equipment is mainly used to realize the functions of wireless physical layer, resource scheduling and wireless resource management, wireless access control and mobility management; the management equipment is mainly used for equipment registration, security authentication, mobility management and location management of the terminal device, and the gateway device is mainly used to establish a channel with the terminal device, and forward the data packets between the terminal device and the external data network on the channel; the data network can correspond to a variety of different service domains, such as IP multimedia subsystem (IP multimedia subsystem, IMS), Internet (Internet), Internet protocol television (internet protocol television, IPTV), other operator service domains, etc., and is mainly used to provide a variety of data service services for the terminal device, which may include network equipment such as servers (including servers providing multicast services), routers, gateways, etc. For a terminal that wants to receive IP multicast service data packets, it is necessary to request to join / exit the multicast IP address corresponding to a multicast service through a group management protocol to start receiving / ending the multicast service. The group management protocol of IP multicast is the Internet Group Management Protocol (IGMP) in IPv4, and the corresponding multicast listener discovery protocol (MLD) in IPv6. It should be noted that Figure 1 This is only an exemplary architecture diagram. Figure 1 In addition to the functional units shown in , the network architecture may also include other functional units or functional network elements, which is not limited in the embodiments of the present application.

[0068] when Figure 1When the communication network shown is a 5G network, the above-mentioned terminal device (also referred to as terminal device) can be user equipment (UE), such as: a mobile phone, a computer, and can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a smart phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a computer, a laptop computer, a handheld communication device, a handheld computing device, a satellite wireless device, a wireless modem card, a TV set top box (STB), customer premise equipment (CPE) and / or other equipment used to communicate on a wireless system. The access network device may be an access network (AN) / radio access network (RAN) device, a network composed of multiple 5G-AN / 5G-RAN nodes, the 5G-AN / 5G-RAN nodes may be: access point (AP), next generation base station (NR nodeB, gNB), gNB in ​​a form of central unit (CU) and distributed unit (DU), transmission receive point (TRP), transmission point (TP) or some other access node. The management device may include: unified data management network element (UDM), access and mobility management function (AMF), session management function (SMF), policy control function (PCF), application function (AF), etc.The gateway device may include functional units such as user plane functions (UPF), which can work independently or be combined to implement certain control functions. For example, AMF, SMF and PCF can be combined as management devices to complete access control and mobility management functions such as access authentication, security encryption, and location registration of terminal devices, as well as session management functions such as establishment, release and change of user plane transmission paths, and functions of analyzing some slice-related data (such as congestion) and terminal device-related data. As a gateway device, UPF mainly completes functions such as routing and forwarding of user plane data, such as filtering data packets of terminal devices, data transmission / forwarding, rate control, and generation of billing information. In addition, in order to support the selective routing of service traffic to the data network in the 5G system, the session management network element can control the data path of the protocol data unit (PDU) session, so that the PDU session and the data network can correspond to multiple interfaces at the same time, that is, there can be multiple session anchors for the same PDU session. The user plane function (UPF) that terminates these interfaces is called a PDU session anchor (PSA) or anchor UPF. Each anchor point of a PDU session can also provide a different entry to the same DN.

[0069] exist Figure 1 In the 5G network shown in the figure, each functional unit can establish a connection through the next generation network (NG) interface to achieve communication, such as: the terminal device establishes an air interface connection with the RAN equipment through the new radio (NR) interface to transmit user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); AN / RAN equipment such as the next generation wireless access base station (NR NodeB, gNB), can establish a user plane data connection with the diversion point UPF through NG interface 3 (referred to as N3); AN / RAN equipment can establish a control plane signaling connection with AMF through NG interface 2 (referred to as N2); anchor point UPF can establish a control plane signaling connection with SMF through NG interface 4 (referred to as N4); anchor point UPF can exchange user plane data with the data network through NG interface 6 (referred to as N6); AMF can establish a control plane signaling connection with SMF through NG interface 11 (referred to as N11); SMF can establish a control plane signaling connection with PCF through NG interface 7 (referred to as N7); PCF can establish a connection with AF through NG interface 5 (referred to as N5). It should be noted that Figure 1 The parts shown are only exemplary architectural diagrams. Figure 1In addition to the functional units shown in the illustrated part, the network architecture may also include other functional units or functional network elements, which is not limited in the embodiments of the present application.

[0070] when Figure 1 When the communication network shown is a 4G network, the terminal device can refer to Figure 1 The relevant description of the terminal device is not repeated here; the access network equipment can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), TRP, TP, AP or some other access unit; the core network equipment may include: management equipment such as mobility management entity (mobility management entity, MME), policy and charging rules function (policy and charging rules function, PCRF), as well as gateway devices such as serving gateway (serving gateway, SGW), packet data network gateway (packetdata network gateway, PGW), and local gateway (local gateway, LGW).

[0071] It should be understood that the interface names between network elements in the present application are merely exemplary, and the interfaces between network elements may also have other names, and the present application does not limit the names of the interfaces.

[0072] The terminal device in the embodiments of the present application may refer to a user equipment, an access terminal, a user unit, a user station, a mobile station, a mobile station, 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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0073] The access network device in the embodiment of the present application can be a device for communicating with a terminal device and a core network device. The access network device can be a base station (Base TransceiverStation, BTS) in a global system of mobile communications (Global System of Mobile communication, GSM) or a code division multiple access (Code Division Multiple Access, CDMA), or a base station (NodeB, NB) in a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, or an evolved base station (Evolutional NodeB, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the access network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or an access network device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0074] The 5G network introduces the technical research of non-terrestrial networks (NTN). NTN is a communication network that introduces aircraft (aircraft / drone) or satellites into the communication system as relay nodes or base stations. In the NTN network, since satellite equipment is involved in the communication process, when sending data between the UE and the base station, the data needs to be transmitted to the satellite. Due to the long transmission distance, a large transmission delay is caused, resulting in a round-trip time (RTT) of data transmission of tens to hundreds of milliseconds, while the RTT of traditional terrestrial communication networks is a few milliseconds or shorter.

[0075] According to the International Telecommunication Union (ITU) standards, satellite services in communication systems are divided into two categories: mobile satellite service (MSS) and fixed satellite service (FSS).

[0076] Among them, FSS refers specifically to ground terminals with fixed positions, including a fixed point or several fixed points in a fixed area. For example, the feeder link in NTN: geosynchronous orbit or geostationary orbit (GSO) satellite-gateway station; while MSS refers specifically to mobile terminals, such as the service link in NTN: mobile UE or non-geostationary orbit (NGSO) satellite-gateway station.

[0077] Correspondingly, the two types of services, FSS and MSS, correspond to two types of terminals (i.e., MSS terminals and FSS terminals) using different frequencies. For example, the S band of R17 is the MSS band, and the Ka band of R18 is the FSS band. In the related art, interference management of FSS terminals can be achieved by using different frequency bands for FSS terminals and MSS terminals to avoid affecting the communication of FSS. For example, assuming that the FSS terminal in area A uses the FSS frequency band, since it is bound to area A, it is only necessary to avoid other UEs from using the FSS frequency band in the designated area A (for example, other UEs can use the MSS frequency band in the designated area A), thereby completing the interference management.

[0078] In the related art, spectrum utilization can also be improved by multiplexing FSS frequency bands to MSS terminals. For example, in area A, the available FSS frequency bands include {A, B}, and frequency band set A is dedicated to FSS terminals. In order to improve spectrum utilization, when the MSS terminal moves to area A, frequency band set B can be multiplexed to the MSS terminal. Therefore, the FSS terminal can access all frequency bands, while the MSS terminal can only access some frequency points (i.e., frequency band set B, and cannot access frequency band set A).

[0079] In another related technology, for example, if the current area or cell is provided with FSS services by GSO satellites for FSS terminals and the frequency band used is Ka band, it can be assumed that the MSS terminal can use Ka band in this area, or can access the current cell; but if the current area or cell is provided with FSS services by NGSO satellites for FSS terminals and the frequency band used is Kaband, the MSS terminal cannot use Ka band in this area, or cannot access the current cell.

[0080] Therefore, since the types of terminals corresponding to the FSS and the terminals corresponding to the MSS are different, in the current mobility management (for example, during cell reselection or cell switching), the MSS terminal may access a cell at an unlicensed frequency.

[0081] In view of this, the present application provides a communication method, which prevents the MSS terminal from being switched to a cell corresponding to an unsupported frequency by using the base station to broadcast whether the current cell allows the MSS terminal device to access during the terminal device cell reselection process, or by determining whether the MSS terminal is allowed to access by measuring the frequency point across frequencies during the terminal device cell reselection process, or by performing measurement configuration and switching management based on the service information of the terminal device and the frequency point information of the neighboring area during the terminal device service cell switching process.

[0082] Before introducing the communication method provided by the present application, the concept of cell reselection or cell switching of a terminal device is first specifically introduced.

[0083] 1. Cell reselection: After a terminal device successfully resides in a cell, if the terminal device does not perform any data services, the terminal device will be in the radio resource control (RRC) idle state. RRC idle state mobility management mainly refers to cell reselection. The following cell reselection related content also applies to terminal devices in the RRC inactive state (INACTIVE).

[0084] Generally speaking, a terminal device in an RRC idle or inactive state will measure the signal quality of the serving cell and the neighboring cell. If the signal quality of the serving cell is poor, while the signal quality of the neighboring cell is good, the terminal device will actively reselect a cell with a higher priority or better signal quality as the serving cell. This process is generally called cell reselection. Cell reselection occurs in the terminal device and does not involve signaling interaction between the terminal device and the base station.

[0085] Specifically, the overall process of 5G cell reselection is basically the same as that of 2G, 3G and 4G, that is, the R / S principle. The overall process of cell reselection includes three stages: starting neighboring cell measurement, reselection evaluation and judgment, and cell reselection execution.

[0086] (1) Start neighboring cell measurement: Determine whether to start neighboring cell measurement based on the measurement start conditions. After the start decision, the terminal device will measure the signal quality of the current serving cell and neighboring cells. The neighboring cells may have the same frequency as the current cell or different frequencies.

[0087] (2) Reselection evaluation and judgment: The terminal device determines whether the neighboring cell signal meets the cell reselection criteria. If it does, it executes cell reselection. If it does not, it remains in the current serving cell.

[0088] (3) Cell reselection execution: The terminal device executes cell reselection and starts receiving system messages of the new cell. If there is no access restriction (for example, the operator has configured some reserved cells or cells with access restrictions, and the terminal device cannot access such cells), the terminal device resides in the new cell.

[0089] 2. Cell switching: RRC connection state mobility management mainly refers to cell switching.

[0090] Specifically, the cell switching includes the following processes:

[0091] (1) The gNB decides whether to initiate the handover procedure.

[0092] The handover initiation decision mainly includes two factors: the handover function switch has been turned on and the serving cell signal quality meets the conditions. It is generally judged by A1 event (i.e. the serving cell signal quality is higher than a certain threshold) or A2 event (the serving cell signal is lower than a certain threshold).

[0093] After the handover start decision is passed, the base station will select the processing mode of the handover process. Including:

[0094] Measurement mode: The base station instructs the terminal device to measure and report the signal quality of the measurement object in units of frequency according to the measurement configuration information. The base station generates a target cell list based on the measurement report reported by the terminal device.

[0095] Blind mode: The base station does not instruct the terminal device to measure the signal quality of the candidate target cells, but directly generates a list of target cells or target frequencies based on the priority parameters. When the blind mode is used, the risk of access failure is high due to the uncertainty of the signal quality of the target cells. In general, the blind mode is not recommended and is only used when the handover must be sent as soon as possible.

[0096] (2) The base station can transmit the measurement configuration information to the terminal device through the RRC Reconfiguration message.

[0097] Among them, the measurement configuration information includes: measurement object, measurement gaps, report configuration, trigger quantity and measurement ID, etc. Specifically, the measurement object refers to the object on which the terminal device performs measurement, including the synchronization signal block (SSB) and / physical broadcast channel block (PBCH block), SSB subcarrier spacing, SSB-based measurement timing configuration (SMTC), white cell list and black cell list. The measurement GAP is the time period for the terminal device to leave the current frequency point and measure other frequency points (for hetero-frequency measurement and hetero-system measurement). The report configuration is the standard for triggering the reporting of the measurement report and the format of the measurement report. The trigger quantity is the strategy for triggering the event reporting. The measurement ID combines the measurement object and the report configuration as a set. That is, each measurement ID corresponds to a measurement object and a report configuration. For multiple measurement IDs, it may correspond to multiple measurement objects and the same report configuration, or it may correspond to this measurement object and multiple report configurations.

[0098] (3) The terminal device performs relevant measurements according to the measurement configuration and generates a cell measurement result. Generally speaking, the terminal device measures multiple SSB beams of the cell and combines the beam-level measurement results to derive the cell quality.

[0099] (4) After the terminal device performs measurement according to the measurement configuration information sent by the base station, it evaluates the measurement report. If the measurement report conditions are met, the terminal device will fill in the measurement report and send it to the base station.

[0100] (5) The base station determines whether there is a suitable new service cell based on the measurement report. If so, the handover is performed; otherwise, the handover waits for the next measurement report to be reported. The handover process mainly includes: first, determining the handover strategy, including handover and redirection. Among them, handover refers to the process in which the base station changes the terminal device from the original service cell to the target cell without initiating RRC connection release to ensure service continuity. Redirection refers to the process in which the base station directly initiates RRC connection release to the terminal device and instructs the terminal device to select a cell access at a specific frequency point.

[0101] (6) The base station finds a suitable new serving cell and instructs the terminal device to perform a handover.

[0102] Combine the following Figure 2 The communication method provided describes how the MSS UE can avoid accessing unsupported frequencies during cell reselection. Figure 2 A schematic interaction diagram of a communication method 200 provided in an embodiment of the present application is shown, and the method can be applied in the above Figure 1 The scenario shown can of course also be applied to other communication scenarios, and the embodiments of the present application are not limited here.

[0103] It should be understood that in the embodiment of the present application, the method 200 is described by taking the terminal device and the network device as the execution subjects of each step in the method 200. As an example but not a limitation, the execution subjects of each step in the method 200 may also be a chip applied to the terminal device and a chip applied to the network device.

[0104] like Figure 2 As shown, Figure 2 The method 200 shown in FIG. 2 may include S210 to S240. Figure 2 Each step in method 200 is described in detail.

[0105] S210. The serving base station sends a first indication message, where the first indication message is used to indicate that the cell does not allow the MSS terminal to access or the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0106] In the embodiment of the present application, the serving base station may indicate, through the first indication information, whether the current cell allows the MSS terminal to access or whether the frequency point corresponding to the cell allows the MSS terminal to access.

[0107] In a possible implementation, the first indication message directly indicates that the current cell allows the MSS terminal to access or the frequency band corresponding to the cell allows the MSS terminal to access. It should be understood that the frequency band of the cell that the MSS terminal can access is the frequency band that the MSS terminal is allowed to access.

[0108] In another possible implementation manner, the first indication message may also directly indicate that the current cell does not allow the MSS terminal to access or the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0109] Specifically, the serving base station broadcasts a first indication message, and adds an indication Mobile NTNAccessAllowed in the first indication message, indicating the frequency points supported by the cell corresponding to the serving base station, or whether the frequency point corresponding to the current cell allows the MSS UE to access.

[0110] It should be noted that a frequency band refers to a frequency range, for example, 2515MHz-2675MHz of a mobile operator is a frequency band; a frequency is a point on the frequency band, for example, 2610MHz is a frequency; bandwidth is a small part of the frequency band, and bandwidth is also the frequency actually used in communication; a frequency point is a number, which can be understood as the ID of the frequency of the bandwidth. Therefore, the frequency point supported by the cell corresponding to the service base station mentioned in the embodiment of the present application can be understood as the ID of the frequency actually used by the cell corresponding to the service base station in communication.

[0111] It should also be noted that the first indication information can be sent in a system message. The system message refers to the system configuration and access information broadcast by the wireless network to the terminal device through the broadcast channel (BCCH); the content of the system message is divided into multiple system information blocks (SIBs), and the system message block contains specific information required for the terminal device to perform cell selection, reselection, switching and other processes.

[0112] Specifically, the system message consists of a master information block (MIB) and several SIB messages, where MIB is broadcast regularly on PBCH and contains the basic physical layer information of the cell required for cell access prohibition and further receiving system information. SIB1 is broadcast regularly on PDSCH or sent in a dedicated manner to UEs in RRC_CONNECTED state, containing the information required for initial access and scheduling information of other system information blocks.

[0113] In a possible implementation, the serving base station may broadcast the MIB and add an indication MobileNTN AccessAllowed in the MIB to indicate whether the cell corresponding to the serving base station allows access by the MSS UE, or whether the frequency point corresponding to the current cell allows access by the MSS UE.

[0114] In another possible implementation, the serving base station may broadcast SIB1 and add an indication Mobile NTN AccessAllowed in SIB1 to indicate whether the cell corresponding to the serving base station allows access by MSS UE, or whether the frequency corresponding to the current cell allows access by MSS UE.

[0115] Exemplarily, the FSS terminal can use the frequency bands {A, B}, frequency band set A is dedicated to FSS UE, and frequency band set B is multiplexed for MSS UE. Therefore, FSS UE can access all frequency bands, while MSS UE can only access some frequency points (i.e., frequency band set B, and cannot access frequency band set A). Therefore, when the frequency point of the cell corresponding to the serving base station is frequency band B, it can be indicated by broadcasting MIB or broadcasting SIB1 that the current cell allows MSS UE to access, or by broadcasting MIB or broadcasting SIB1, it can be broadcast that the frequency point of the current cell is frequency band B and allows MSS UE to access.

[0116] Alternatively, when the frequency of the cell corresponding to the serving base station is frequency band A, it can be indicated by broadcasting MIB or broadcasting SIB1 that the current cell does not allow MSS UE access, or it can be broadcasted by broadcasting MIB or broadcasting SIB1 that the frequency of the current cell is frequency band B and does not allow MSS UE access.

[0117] For example, assuming that the MSS terminal has available frequency bands {C, D}, frequency band set C is dedicated to MSS UE, and frequency band set D is multiplexed to FSS UE. Therefore, MSS UE can access all frequency bands, while FSS UE can only access some frequency points (i.e., frequency band set D, and cannot access frequency band set C). Similarly, the access management of FSS UE can be implemented by referring to the above method.

[0118] In some other embodiments, the first indication information is carried in the MIB, and the indication value of cellBarred in the MIB is set to barred, indicating that the MSS terminal does not access. Or the first indication information is carried in SIB1, and the indication value of cellBarredNTN in SIB1 is set to barred, indicating that the MSS terminal does not access.

[0119] Furthermore, the service base station may also carry a third indication information in the MIB, wherein the third indication information indicates that the FSS terminal can access for intra-frequency reselection, or the third indication information indicates that the FSS terminal can ignore the indication in the first indication information that the MSS terminal is not allowed to access, that is, the FSS terminal can always access the service base station for intra-frequency reselection.

[0120] Alternatively, the serving base station may also carry a third indication information in SIB1, wherein the third indication information indicates that the FSS terminal can access for intra-frequency reselection, or the third indication information indicates that the FSS terminal can ignore the indication in the first indication information that the MSS terminal is not allowed to access, and instructs the FSS terminal to always allow access for intra-frequency reselection.

[0121] For example, if the current area or cell is served by an NGSO satellite for an FSS terminal, and the frequency band used is Ka band, the serving base station may send MIB to the MSS terminal, and set the indication value of cellBarred in MIB to barred, indicating that the MSS terminal is not allowed to access, or send SIB1 to the MSS terminal, and set the indication value of cellBarredNTN in SIB1 to barred, indicating that the MSS terminal is not allowed to access. This prevents the MSS from accessing an unauthorized frequency band.

[0122] Furthermore, the MIB sent by the serving base station may also indicate that the FSS terminal can always access for intra-frequency reselection, or the MIB may indicate that the FSS terminal can ignore the indication that the MSS terminal is not allowed to access, indicating that the FSS terminal can always access the serving base station for intra-frequency reselection.

[0123] S220. The terminal device receives a first indication message sent by the serving base station and determines whether it can access the cell corresponding to the current serving base station.

[0124] It should be noted that the terminal device is an MSS terminal used in NTN.

[0125] The terminal device receives a first indication message sent by the serving base station, where the first indication message may indicate that the cell does not allow the MSS terminal to access or that the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0126] Optionally, the MSS terminal may ignore the existing cellbar indication in the MIB, or the existing cellBarredNTN indication.

[0127] In a possible implementation, when the terminal device receives the MIB broadcasted by the serving base station and adds the value of Mobile NTN AccessAllowed to the MIB and it is True, it indicates that the cell corresponding to the serving base station allows the MSS UE to access. Otherwise, when there is no Mobile NTN AccessAllowed indication or the value of Mobile NTN AccessAllowed is False, it indicates that the terminal device cannot access the cell corresponding to the serving base station.

[0128] In another possible implementation, when the terminal device receives SIB1 broadcast by the serving base station and adds the value of Mobile NTN AccessAllowed to SIB1 and it is True, it indicates that the cell corresponding to the serving base station allows the MSSUE to access. Otherwise, when there is no Mobile NTN AccessAllowed indication or the value of Mobile NTN AccessAllowed indication is False, it indicates that the terminal device cannot access the cell corresponding to the serving base station.

[0129] S230. The serving base station sends second indication information to the terminal device, where the second indication information is used to indicate other inter-frequency bands and whether the inter-frequency frequency points allow the MSS terminal to access.

[0130] In some embodiments, the second indication information is carried in SIB4, and the serving base station may broadcast SIB4 to the terminal device. SIB4 includes heterogeneous frequency points (including frequency-common cell reselection parameters and cell-specific reselection parameters).

[0131] It should be noted that the same frequency point means that the cell where the terminal device is currently located and the target cell to be measured are on the same carrier frequency point (center frequency point). Different frequency points mean that the cell where the terminal device is currently located and the target cell are not on the same carrier frequency point, or are on the same carrier frequency, but the subcarrier spacing of the measurement signal is different.

[0132] In the embodiment of the present application, the heterofrequency frequency point can be understood as a frequency point different from the frequency point where the current cell is located. The cell corresponding to the frequency point can be the cell corresponding to the neighboring base station or the cell corresponding to the service base station. The embodiment of the present application does not limit this.

[0133] In some other embodiments, the second indication information sent by the serving base station to the MSS terminal is an intra-frequency reselection indication, for example, by setting the indication value of intraFreqReselection to notallowed, the MSS terminal is instructed to perform inter-frequency reselection.

[0134] S240. The terminal device obtains other inter-frequency points and performs inter-frequency measurement.

[0135] When the serving base station sends an inter-frequency point to the terminal device by broadcasting SIB4, the terminal device can read the system message carried in SIB4, obtain other inter-frequency points and perform measurements.

[0136] It should be noted that inter-frequency measurement refers to measurement performed on a downlink carrier frequency different from that of the serving cell, and the measurement indicators include: Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ).

[0137] RSRP is defined as the linear average of the power contribution of resource elements carrying the cell-specific reference signal within the measured bandwidth. RSRQ refers to the signal-to-noise ratio and interference level of the current channel quality. It is not only related to the RE power carrying RS, but also to the RE power carrying user data quota, as well as the interference level of neighboring cells. Therefore, RSRP changes with network load and interference. The greater the network load, the greater the interference, and the smaller the RSRQ measurement value.

[0138] When the cell corresponding to the serving base station allows MSS UE to access, the terminal device can determine whether it can access the cell based on the inter-frequency measurement result.

[0139] It should also be noted that when the cell corresponding to the serving base station does not allow the MSS UE to access, the terminal device can still obtain system messages and perform inter-frequency measurements.

[0140] It should be understood that in the relevant technology, if the cell corresponding to the serving base station does not allow the MSS UE to access, the terminal device cannot read the system message carried in SIB4 sent by the serving base station. Therefore, the MSS UE can only blindly select the heterofrequency, thereby performing heterofrequency measurement for cell reselection. This method will result in a higher risk of access failure.

[0141] In an embodiment of the present application, even if the cell corresponding to the serving base station does not allow the MSS UE to access and the MSS UE cannot reside in the current cell, the terminal device can still choose to read the system message carried in SIB4, obtain other heterofrequency points, perform heterofrequency measurements and then reselect the cell, thereby improving the success rate of the MSS UE accessing the cell.

[0142] The above method 200 is aimed at the scenario of mobility management in idle state, and utilizes the service base station to broadcast system messages so that the terminal device obtains the message whether the current cell supports MSS UE access, thereby avoiding the terminal device switching to an unsupported frequency when reselecting the cell. In addition, when the MSS UE cannot access the cell, it can also read the inter-frequency points broadcast by the system message, thereby measuring the frequencies of other inter-frequency neighboring cells, and finally obtaining an accessible cell, thereby improving the success rate of MSS UE accessing the cell.

[0143] Combine the following Figure 3-Figure 6The communication method provided illustrates how MSS UE can avoid accessing unsupported frequencies in the mobility management scenario. Figure 3 A schematic diagram of a scenario of mobility management in a connected state is shown, such as Figure 3 As shown, when a user uses a terminal device, the user's location may change. When the terminal device moves to the edge of the serving cell (for example, the terminal device moves to the signal overlap area of ​​the serving cell and the neighboring cell 1), it needs to be switched to the neighboring cell in time to obtain continuous service of the mobile network. In this scenario, how to avoid the terminal device being switched to the cell corresponding to the unsupported frequency point is a problem that needs to be solved.

[0144] Based on this, the embodiment of the present application also provides another communication method. In the scenario of mobility management in the connected state, the service base station can perform measurement configuration and switching management according to the service information of the terminal device and the frequency point information of the neighboring area. This prevents the MSS terminal from being switched to a cell corresponding to an unsupported frequency point, resulting in the inability to obtain the corresponding network service.

[0145] Below, Figure 4 Taking the example of another communication method provided in the embodiment of the present application as an example, Figure 4 A schematic interaction diagram of another example of a communication method 400 provided in an embodiment of the present application is shown. Figure 4 As shown, the method 400 includes S410 to S440.

[0146] It should be understood that in the embodiment of the present application, the method 400 is described by taking the terminal device and the network device as the execution subjects of each step in the method 400. As an example but not a limitation, the execution subjects of each step in the method 400 may also be a chip applied to the terminal device and a chip applied to the network device.

[0147] S410: The serving base station obtains frequency information of a neighboring base station and whether to allow the MSS UE to access.

[0148] It should be understood that when the MSS UE moves to a neighboring base station, in order to ensure network services for the MSS UE during movement and thereby avoid the MSS UE being switched to a cell corresponding to an unsupported frequency, the serving base station can obtain the frequency information of the neighboring base station and whether the frequency supports MSS terminal access.

[0149] In a possible implementation, the serving base station may obtain the frequency information of the neighboring base station and whether to allow the MSS UE to access based on operations, administration, and maintenance (OAM) pre-configuration.

[0150] It should be understood that OAM pre-configuration of a base station refers to the configuration of a base station before the base station is installed and configured. This configuration process includes the configuration of the base station hardware and software, as well as the configuration of the OAM protocol. For example, the base station wireless access parameters, such as access point, frequency band, password, etc.

[0151] In another possible implementation, the serving base station may establish a connection with a neighboring base station, establish a message through Xn, and the neighboring base station sends the frequency information and information on whether the MSS UE is allowed to access to the serving base station.

[0152] In another possible implementation, when a connection is established between the serving base station and the neighboring base station, the neighboring base station sends frequency information and information on whether the MSS UE is allowed to access to the serving base station through an NG-RAN node configuration update message.

[0153] S420. The terminal device sends an RRC connection request to the serving base station and accesses the serving base station.

[0154] When the terminal device is in an idle state, the terminal device can send an RRC connection request to the serving base station to access the serving base station.

[0155] Specifically, the terminal device can send an RRC connection establishment request (RRC Setup Request) to the serving base station to establish a connection with the serving base station. The serving base station sends an RRC setup (RRC Setup) message to the terminal device to complete the RRC establishment process. After the terminal device and the serving base station establish a connection, the terminal device can send an RRC setup complete (RRC Setup Complete) message to the serving base station, indicating that the terminal device has successfully accessed the serving base station.

[0156] S430. The terminal device reports information of the terminal device to the serving base station, where the information includes service information and category information, where the category information includes MSS UE or FSS UE.

[0157] It should be understood that since the MSS terminal and the FSS terminal use different frequencies, the serving base station needs to determine the type of the terminal device before determining whether the UE can be successfully handed over to the neighboring base station.

[0158] In a possible implementation, the terminal device may report user assistance information (User Assistance Information, UAI) to the serving base station. The UAI carries the type information of the UE. Exemplarily, in the embodiment of the present application, the UE is an MSS UE.

[0159] In another possible implementation, the serving base station may send a UE Information Request to the terminal device, requesting the terminal device to report its capabilities. After receiving the UE Information Request, the terminal device reports a UE Information Response message to the serving base station, which may carry UE type information. Exemplarily, in an embodiment of the present application, the UE is an MSS UE.

[0160] In another possible implementation, after the terminal device and the service base station establish an RRC connection, the AMF sends the contract information to the service base station, and the service base station can obtain the service information of the terminal device based on the contract information.

[0161] For example, the AMF sends an Initial context set up request message to the serving base station to start the initial context establishment process. The message carries the UE's subscription information. The serving base station can obtain the UE's service information based on the received subscription information.

[0162] It should be understood that AMF is a control plane network function provided by the operator network, responsible for access control and mobility management of terminal devices accessing the operator network, such as mobility status management, allocation of user temporary identity, authentication and authorization of users, etc. Therefore, AMF can obtain the contract information between UE and a certain operator.

[0163] In another possible implementation, during the process of switching from the source base station to the target base station, the source base station sends a Handover Request message to the current service base station through the Xn interface. The Handover Request message carries the service information of the UE. Exemplarily, in an embodiment of the present application, the UE is an MSS UE.

[0164] Alternatively, during the process of switching from the source base station to the target base station, the source base station sends a retrieve uecontext request (request for obtaining UE context information) message to the serving base station, and the retrieve ue context request message carries the service information of the UE. Exemplarily, in an embodiment of the present application, the UE is an MSS UE.

[0165] S440. The serving base station sends a measurement configuration to the terminal device according to the information of the terminal device and the frequency information of the neighboring base station. The frequency of the measurement configuration is the frequency allowed to be accessed by the MSS UE.

[0166] After the serving base station obtains the service information of the terminal device and the frequency information of the neighboring base station, it sends a measurement configuration to the terminal device based on the service information of the terminal device and the frequency information of the neighboring base station. The frequency corresponding to the measurement configuration is the frequency allowed for access by the MSSUE.

[0167] Exemplarily, it is assumed that the frequency point that the MSS UE can access is the frequency band set B. The frequency point of the neighboring base station 1 obtained by the serving base station is frequency point B, and the frequency point B allows the MSS UE to access, and the frequency point of the neighboring base station 2 is frequency point C, and the frequency point C does not allow the MSS UE to access; at the same time, the serving base station obtains that the terminal device to be switched is an MSS terminal, then the serving base station sends a measurement configuration to the terminal device, in which the channel quality of the cell corresponding to the neighboring base station 1 is measured and reported in units of frequency point B, and finally the serving base station generates a target cell list according to the measurement report reported by the terminal device.

[0168] In method 400, after the serving base station obtains the information of the terminal device, the frequency of the neighboring base station and whether the frequency allows MSS UE access, it sends a measurement configuration to the terminal device based on the information of the terminal device, the frequency of the neighboring base station and whether the frequency allows MSS UE access, so that the terminal device can perform channel quality measurement based on the accessible frequency, thereby avoiding the terminal device switching to an unsupported frequency during the switching process and being unable to measure the channel quality.

[0169] In the above method 400, after the service base station obtains the frequency type of the neighboring base station, it sends the measurement configuration to the terminal device, thereby avoiding the terminal device from switching to an unsupported frequency during the reselection process. The embodiment of the present application also provides another communication method 500. In this method, the service base station does not know the frequency type corresponding to the neighboring base station. When the service base station initiates a cell switching request, the target base station to be switched determines whether the terminal device can access the cell. If the frequency corresponding to the target base station does not allow access, a rejection is fed back. This method can avoid the terminal device switching to an unsupported frequency during the switching process and being unable to measure the channel quality.

[0170] Below, Figure 5 Taking the example of another communication method provided in the embodiment of the present application as an example, Figure 5 A schematic interaction diagram of another example of a communication method 500 provided in an embodiment of the present application is shown. Figure 5 As shown, the method 500 includes S510 to S550.

[0171] It should be understood that in the embodiment of the present application, the method 500 is described by taking the terminal device and the network device as the execution subjects of each step in the method 500. As an example but not a limitation, the execution subjects of each step in the method 500 may also be a chip applied to the terminal device and a chip applied to the network device.

[0172] S510. The terminal device performs measurement according to the measurement configuration and reports the measurement result.

[0173] In the mobility management scenario of a terminal device in a connected state, when the terminal device needs to switch cells, the source base station sends a measurement configuration to the terminal device, the terminal device measures the channel quality of the target cell, and then reports a measurement report.

[0174] In the embodiment of the present application, since the source base station does not know the frequency information of the neighboring base station, the frequency points configured in the measurement configuration sent by the source base station to the terminal device include both the frequency points that allow MSS UE to access and the frequency points that do not allow MSS UE to access.

[0175] It should be understood that the content of the measurement results mainly includes: measurement identification (through this identification, the network can use its own stored measurement configuration to obtain the measurement object ID and reporting configuration ID corresponding to this report, the event-triggered measurement event threshold, the purpose of the periodic trigger, etc.), the service cell measurement results (including the cell ID, the cell measurement results such as RSRP, the reference signal measurement results (such as the measurement results for a single SSB), etc.) and the neighboring area measurement results (including the cell ID, the trigger amount corresponding to the cell, etc.).

[0176] S520: The source base station makes a handover decision based on the measurement result, and sends a handover request to the target base station. The handover request carries information of the terminal device.

[0177] It should be understood that the cell switching strategy generally includes cell switching and redirection. Switching refers to the process of changing the terminal device from the original service cell to the target cell without initiating RRC connection release to ensure service continuity. Redirection refers to the process in which the base station directly initiates RRC connection release to the terminal device and instructs the terminal device to select a cell access at a specific frequency. Generally speaking, switching is preferred as the switching strategy. When the terminal device does not support switching or there is no time to switch, the terminal device will choose the redirection switching strategy.

[0178] In some embodiments, in the embodiments of the present application, a handover strategy may be selected, and after the source base station selects and determines the target cell according to the measurement results, a handover request is sent to the target base station. The target cell may be the cell with the strongest signal (RSRP / RSRQ) selected by the source base station according to the measurement results as the target cell.

[0179] In other embodiments, the terminal device may also be switched based on redirection measurement, and the embodiments of the present application do not specifically limit the switching strategy.

[0180] Furthermore, in order to ensure that the MSS UE can successfully access the supported frequency, the source base station can carry the information of the terminal device when sending a switching request to the target base station without knowing the frequency corresponding to the target base station and whether the frequency allows the MSS UE to access. The target base station determines whether the MSS UE can access.

[0181] In some possible implementations, the way in which the source base station obtains the information of the terminal device can refer to the description of step S430, which will not be repeated here.

[0182] It should be noted that the target base station in step S520 includes at least one, that is, the source base station sends a switching request message to at least one target base station, and each switching request message carries information of the terminal device.

[0183] S530: The target base station determines whether to allow the MSS UE to access according to the handover request.

[0184] In an embodiment of the present application, the target base station may determine whether to allow the terminal device to access based on the frequency corresponding to the current cell and the type of terminal device carried in the switching request.

[0185] For example, assuming that the frequency that the MSS UE can access is B, when the frequency of the cell corresponding to the target base station is frequency A, and the type of terminal device carried in the switching request is MSS UE, and the MSS UE cannot access frequency A, then the target base station does not allow the terminal device to access.

[0186] For another example, when the frequency of the cell corresponding to the target base station is frequency B, and the type of the terminal device carried in the switching request is MSS UE, and the MSS UE can access frequency B, then the target base station allows the terminal device to access.

[0187] S540: The target base station sends a handover request feedback message to the source base station, where the message carries an RRC reconfiguration message.

[0188] S550. The source base station sends an RRC reconfiguration message to the terminal device to trigger switching.

[0189] It should be noted that when at least one target base station sends a switching request feedback message to the source base station, the source base station can determine the final switching target base station based on multiple target base stations, and then the source base station sends the RRC reconfiguration message sent by the final switching target base station to the terminal device.

[0190] In method 500, during the process of switching from the source base station to the target base station, the target base station can obtain the information of the terminal device, and then determine whether the terminal device can access the current cell based on the frequency information of the cell currently corresponding to the target base station. If the terminal device cannot access, the target base station will feedback the access rejection to the source base station. If the terminal device can access, the target base station will feedback the RRC reconfiguration to the source base station so that the terminal device can successfully switch to the target base station. In this method, the target base station can decide whether to allow the terminal device to access based on the information of the terminal device and the frequency information of the current corresponding cell, thereby avoiding the terminal device switching to an unsupported frequency during the switching process.

[0191] In the above method 500, the target base station can decide whether to allow the terminal device to access based on the service information of the terminal device and the frequency information of the current corresponding cell. The embodiment of the present application also provides another communication method 600, in which multiple target base stations can feedback the frequency information of the corresponding cells to the source base station. The source base station can make a decision based on the service information of the terminal device and the frequency information of the corresponding cell of the target base station, thereby determining whether the terminal device can switch to a supported frequency after switching.

[0192] Below, Figure 6 Taking the example of another communication method provided in the embodiment of the present application as an example, Figure 6 A schematic interaction diagram of another example of a communication method 600 provided in an embodiment of the present application is shown. Figure 6 As shown, the method 600 includes S610 to S650.

[0193] It should be understood that in the embodiment of the present application, the method 600 is described by taking the terminal device and the network device as the execution subjects of each step in the method 600. As an example but not a limitation, the execution subjects of each step in the method 600 may also be a chip applied to the terminal device and a chip applied to the network device.

[0194] S610: The terminal device performs measurement according to the measurement configuration and reports the measurement result.

[0195] The description of step S610 may refer to the description of step S510 above, which will not be repeated here.

[0196] S620: The source base station makes a handover decision according to the measurement result, and sends a handover request to multiple target base stations to be handed over. The handover request carries information about the query frequency type.

[0197] In an embodiment of the present application, in order to prevent the terminal device from switching to an unsupported frequency during the process of switching from the source base station to the target base station, the source base station can send a handover request (Handover request) message based on the multiple target base stations to be switched determined in the measurement results. The message carries information on the query frequency type, thereby obtaining the frequency types of the multiple target base stations to be switched, and whether the frequency supports the access of the MSS UE.

[0198] S630. Multiple target base stations to be switched respectively send switching request feedback messages to the source base station. The messages carry the frequency type, whether the frequency type supports MSS UE access, and an RRC reconfiguration message.

[0199] Based on the handover request message sent by the source base station, the multiple target base stations to be handed over respectively feed back to the source base station the frequency type supported by the corresponding cell and whether the frequency type supports MSS UE access.

[0200] In a possible implementation, multiple target base stations to be handed over may feed back the frequency type supported by the corresponding cell and whether the frequency type supports the access of the MSS UE to the source base station through a handover request acknowledgement message.

[0201] S640. The source base station determines a target switching cell according to the frequency types fed back by multiple target base stations to be switched and the information of the terminal device.

[0202] In order to ensure that the terminal device can successfully access the supported frequency, before the terminal device switches from the source base station to the target base station, the source base station can determine the target cell for switching based on the frequency types fed back by multiple target base stations to be switched and the type of the terminal device.

[0203] It should be noted that the way in which the source base station obtains the information of the terminal device can refer to the description of step S430, which will not be repeated here.

[0204] S650. The source base station sends an RRC reconfiguration message of the target switching cell to the terminal device to trigger the switching.

[0205] In method 600, during the process of switching from the source base station to the target base station, the source base station obtains the frequency type and the type of terminal device fed back by multiple target base stations to be switched, and then determines the target cell to which the terminal device can switch based on the frequency type and the information of the terminal device fed back by the multiple target base stations to be switched. Then, the source base station sends a switching request to the target cell that can be switched so that the terminal device can successfully switch to the target base station. In this method, the source base station can determine the target cell that can be switched based on the service information of the terminal device and the frequency information of the cells currently corresponding to the multiple target base stations to be switched, thereby avoiding the terminal device from switching to an unsupported frequency during the switching process.

[0206] It should be understood that the methods, situations, categories and divisions of the embodiments in the present application are only for the convenience of description and should not constitute special limitations. The features of various methods, categories, situations and embodiments can be combined without contradiction.

[0207] It should also be understood that the above is only to help those skilled in the art better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application. According to the above examples given, those skilled in the art can obviously make various equivalent modifications or changes. For example, some steps in the above methods 300 and 400 may not be necessary, or some new steps may be added. Or a combination of any two or any multiple embodiments of the above. Such modifications, changes or combined solutions also fall within the scope of the embodiments of the present application.

[0208] It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments. The same or similar points that are not mentioned can be referenced to each other. For the sake of brevity, they will not be repeated here.

[0209] It should also be understood that the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0210] It should also be understood that in the embodiments of the present application, "pre-setting" and "pre-definition" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method.

[0211] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0212] The above describes in detail the communication method examples provided by the present application. It is understandable that the authentication service function, terminal equipment, and unified data management include hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0213] The communication device provided by this application will be introduced below.

[0214] For example, Figure 7 A schematic block diagram of a communication device 700 provided in an embodiment of the present application is shown. The communication device 700 may correspond to the service base station, source base station, and target base station described in the various embodiments of the above-mentioned methods 200 to 600, or may be a chip or component applied to the service base station, source base station, and target base station. Moreover, each module or unit in the communication device 700 is respectively used to execute each action or processing process performed by the service base station, source base station, and target base station described in the various embodiments of the above-mentioned methods 200 to 400.

[0215] like Figure 7 As shown, the communication device 700 includes a transceiver unit 710 and a processing unit 720. The transceiver unit 710 is used to perform specific signal transmission and reception under the drive of the processing unit 720.

[0216] In some embodiments:

[0217] The transceiver unit 710 is used to send a first indication message, where the first indication message is used to indicate that the cell does not allow the MSS terminal to access, or the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0218] The communication device provided in the present application, when the frequency band corresponding to the FSS terminal is multiplexed with the MSS terminal, in order to avoid the MSS from accessing the unauthorized frequency band, the service base station serving the FSS terminal can send a first indication information to the MSS terminal, and the first indication information can indicate that the cell or frequency band corresponding to the current service base station does not allow the MSS terminal to access, and the MSS terminal can refuse to access the cell based on the first indication information, thereby solving the problem in the related art that when the frequency band corresponding to the FSS terminal is multiplexed with the MSS terminal, the MSS terminal may access the unauthorized frequency band.

[0219] It should be noted that the communication device corresponds to a service base station or a chip or component applied to a service base station.

[0220] In other embodiments:

[0221] The transceiver unit 710 is used to obtain frequency information of a neighboring base station and information of a terminal device, wherein the frequency information includes: a frequency and whether the frequency allows an MSS terminal to access, and the terminal device information includes type information of the terminal device and terminal device service information, wherein the type information includes an MSS terminal and an FSS terminal;

[0222] The processing unit 720 is used to send a measurement configuration to the terminal device according to the frequency information of the neighboring base station and the information of the terminal device, where the frequency in the measurement configuration is the frequency that the MSS terminal is allowed to access.

[0223] The communication device provided in the present application can determine the frequency points that the MSS terminal can access based on the acquired frequency point information of the neighboring base station and the information of the terminal device, so that the measurement frequency points in the measurement configuration sent by the service base station to the MSS terminal are the frequency points that the MSS terminal is allowed to access, solving the problem in the related art that the MSS terminal may access an unsupported frequency point.

[0224] It should be noted that the communication device corresponds to a service base station or a chip or component applied to a service base station.

[0225] In some further embodiments:

[0226] The transceiver unit 710 is configured to receive a handover request sent by a source base station, where the handover request carries service information of a terminal device, where the service information includes an MSS terminal and an FSS terminal;

[0227] The processing unit 720 is used to determine whether to allow the MSS terminal to access based on the frequency information of the current cell and the information of the terminal device;

[0228] The transceiver unit 710 is further configured to send a handover request feedback message to the source base station, where the handover request feedback message includes: allowing the MSS terminal to access or not allowing the MSS terminal to access.

[0229] The communication device provided in the present application can determine whether the frequency information corresponding to the current cell allows the MSS terminal to access after receiving the service information of the terminal equipment carried by the source base station and the frequency information of the current cell. If the MSS terminal is allowed to access, the access permission is fed back to the source base station; if the MSS terminal is not allowed to access, the access is not allowed is fed back to the source base station. This method can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0230] It should be noted that the communication device corresponds to a target base station or a chip or component applied to the target base station.

[0231] In some further embodiments:

[0232] The transceiver unit 710 is configured to send a handover request message to at least one target base station, where the handover request message carries frequency query information, where the frequency query information includes: querying the frequency of the current cell corresponding to the target base station and whether the frequency allows the MSS terminal to access;

[0233] The transceiver unit 710 is further configured to receive a handover request feedback message sent by the at least one target base station, where the handover request feedback message carries frequency feedback information, where the frequency feedback information includes a frequency of a current cell corresponding to the at least one target base station and whether the frequency allows the MSS terminal to access;

[0234] The processing unit 720 is used to determine a target switching cell based on at least one frequency feedback information and information of the terminal device, and the frequency corresponding to the target switching cell supports the access of the MSS terminal.

[0235] The communication device provided in the present application determines a target switching cell from at least one target base station according to the service information of the terminal device after obtaining the frequency of the current cell fed back by at least one target base station and the information whether the frequency allows the MSS terminal to access. The frequency corresponding to the target switching cell allows the MSS terminal to access. The judgment based on the source base station in this method can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0236] It should be noted that the communication device corresponds to a source base station or a chip or component applied to the source base station.

[0237] In some further embodiments:

[0238] The transceiver unit 710 is configured to receive a handover request message sent by a source base station, wherein the handover request message carries frequency query information, wherein the frequency query information includes: querying the frequency of the current cell corresponding to the target base station and whether the frequency allows the MSS terminal to access;

[0239] The transceiver unit 710 is further configured to send handover request feedback information to the source base station based on the handover request message, where the handover request feedback information carries frequency feedback information, where the frequency feedback information includes a frequency of a current cell corresponding to at least one target base station and whether the frequency allows the MSS terminal to access;

[0240] The frequency feedback information is used by the source base station to determine a target switching cell, and the frequency corresponding to the target switching cell supports access by the terminal device.

[0241] The communication device provided in the present application can, after receiving the frequency query information carried in the switching request message, feedback the frequency of the current cell and whether the frequency allows the MSS terminal to access to the source base station, so that the source base station can determine the target switching cell from at least one target base station based on the service information and frequency feedback information of the terminal device, and the frequency corresponding to the target switching cell allows the MSS terminal to access. In this method, the judgment based on the source base station can prevent the MSS terminal from accessing an unsupported frequency during the cell switching process.

[0242] It should be noted that the communication device corresponds to a target base station or a chip or component applied to the target base station.

[0243] It should be understood that the specific process of each unit in the communication device 700 performing the above corresponding steps can be referred to in the above combined method 200 to method 600 and Figure 2 and Figure 6 For example, the transceiver unit 710 may perform the steps of receiving and sending in the above method embodiment, and the processing unit 720 may perform the steps other than sending and receiving. Various specific processing are as described in the method embodiment. For the sake of brevity, no further description is given here.

[0244] Figure 8 FIG. 8 is a schematic block diagram of another example of a communication device 800 provided in an embodiment of the present application. Figure 8 As shown, the communication device 800 may include a processor 810, a memory 820, a transceiver 830, and a bus system 840. The various components of the communication device 800 are coupled together through the bus system 840, wherein the bus system 840 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for the sake of clarity, Figure 8 In the figure, various buses are labeled as bus system 840. For convenience of representation, Figure 8 The drawing is only schematic.

[0245] Figure 7 The communication device 700 or Figure 8 The communication device 800 shown can implement the steps performed by the serving base station, the source base station and the target base station in each embodiment of the aforementioned method 200 to method 600. Similar descriptions can refer to the descriptions in the aforementioned corresponding methods. To avoid repetition, they will not be repeated here.

[0246] It should also be understood that Figure 7 The communication device 700 or Figure 8 The communication device 800 shown may be a serving base station, a source base station, and a target base station.

[0247] Fig. 9 A schematic block diagram of a communication device 900 of an embodiment of the present application is shown. The communication device 900 may correspond to the terminal device described in the above methods 200 to 600, or may be a chip or component applied to the terminal device. In addition, each module or unit in the communication device 900 is respectively used to execute each action or processing process performed by the terminal device in the above methods 200 to 600.

[0248] like Fig. 9 As shown, the communication device 900 may include a transceiver unit 910 and a processing unit 920. The transceiver unit 910 is used to perform specific signal transmission and reception under the drive of the processing unit 920.

[0249] In some embodiments:

[0250] The transceiver unit 910 is used to receive first indication information, where the first indication information is used to indicate that the cell does not allow the MSS terminal to access, or the frequency band corresponding to the cell does not allow the MSS terminal to access.

[0251] The processing unit 920 is configured to deny access to a cell corresponding to the serving base station based on the first indication information.

[0252] In the communication device provided in the present application, when an MSS terminal reuses a frequency band used by an FSS terminal, in order to avoid accessing an unauthorized frequency band, the MSS terminal receives first indication information sent by the FSS terminal, and the first indication information may indicate that the cell or frequency band corresponding to the current serving base station does not allow the MSS terminal to access. The MSS terminal may refuse to access the cell based on the first indication information, thereby solving the problem in the related art that when the frequency band corresponding to the FSS terminal is reused by the MSS terminal, the MSS terminal may access an unauthorized frequency band.

[0253] It should be noted that the communication device corresponds to an MSS terminal applied in the NTN or a chip or component of an MSS terminal applied in the NTN.

[0254] It should be understood that the specific process of each unit in the communication device 900 performing the above corresponding steps can refer to the description of the terminal device related to the relevant embodiments in the above method 200 to method 600. For example, the transceiver unit 910 can perform the steps involving receiving and sending in the above method embodiment, and the processing unit 920 can perform steps other than processing and transceiving. Various specific processing methods are described in the method embodiment. For the sake of brevity, they are not repeated here.

[0255] Optionally, the transceiver unit 910 may include a receiving unit (module) and a sending unit (module), which are used to execute the steps of the terminal device receiving information and sending information in each embodiment of the aforementioned method 200 to method 600.

[0256] It should be understood that the transceiver unit 910 may be a transceiver, an input / output interface or an interface circuit. The storage unit may be a memory. The processing unit 920 may be implemented by a processor. Fig.10 FIG. 1 is a schematic block diagram of another example of a communication device 1000 provided in an embodiment of the present application. Fig.10 As shown, the communication device 1000 may include a processor 1010 , a memory 1020 , and a transceiver 1030 .

[0257] Fig. 9 The communication device 900 or Fig.10 The communication device 1000 shown can implement the steps performed by the terminal device in the embodiments of the aforementioned methods 200 to 600. Similar descriptions can refer to the descriptions in the aforementioned corresponding methods. To avoid repetition, they will not be described here.

[0258] It should also be understood that Fig. 9 The communication device 900 or Fig.10 The communication apparatus 1000 shown may be a terminal device.

[0259] It should also be understood that the division of units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And the units in the device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and called and executed by a certain processing element of the device. The processing element here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element.

[0260] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASIC), or one or more digital signal processors (DSP), or one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0261] Fig.11 The structural diagram of a terminal device 1100 provided in the present application can be used to implement the functions of the MSS terminal in the above method. The above communication device 900 or communication device 1000 can be configured in the terminal device 1100. Alternatively, the communication device 900 or communication device 1000 itself can be the terminal device 1100. In other words, the terminal device 1100 can perform the actions performed by the MSS terminal in the above methods 200 to 600. Optionally, for ease of description, Fig.11 Only the main components of the terminal device are shown. Fig.11 As shown, the terminal device 1100 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

[0262] The processor is mainly used to process the communication protocol and communication data, as well as to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to perform the actions described in the above-mentioned transmission precoding matrix indication method embodiment. The memory is mainly used to store software programs and data, for example, to store the codebook described in the above-mentioned embodiment. The control circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals. The control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc. are mainly used to receive data input by users and output data to users.

[0263] When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0264] Those skilled in the art will appreciate that for ease of description, Fig.11 Only one memory and processor are shown. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.

[0265] For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process the communication protocol and communication data, and the central processing unit is mainly used to control the entire terminal device, execute software programs, and process data of the software programs. Fig.11 The processor in integrates the functions of the baseband processor and the central processing unit. Those skilled in the art will appreciate that the baseband processor and the central processing unit may also be independent processors interconnected through technologies such as buses. Those skilled in the art will appreciate that the terminal device may include multiple baseband processors to adapt to different network formats, and the terminal device may include multiple central processing units to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor may also be described as a baseband processing circuit or a baseband processing chip. The central processing unit may also be described as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built into the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0266] For example, in the embodiment of the present application, the antenna and the control circuit having the transceiver function may be regarded as the transceiver unit 1101 of the terminal device 1100, and the processor having the processing function may be regarded as the processing unit 1102 of the terminal device 1100. Fig.11As shown, the terminal device 1100 includes a transceiver unit 1101 and a processing unit 1102. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 1101 may be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 1101 may be regarded as a sending unit, that is, the transceiver unit 1101 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0267] Fig.12 A structural diagram of a network device 1200 provided in an embodiment of the present application can be used to implement the functions of the serving base station, the source base station and the target base station in the above method. The network device 1200 includes one or more radio frequency units, such as a remote radio unit (RRU) 1201 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1202. The RRU 1201 can be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 12011 and a radio frequency unit 12012. The RRU 1201 part is mainly used for the transceiver of radio frequency signals and the conversion of radio frequency signals and baseband signals, for example, for sending the signaling message in the above embodiment to the terminal device. The BBU 1202 part is mainly used for baseband processing, controlling the base station, etc. The RRU 1201 and the BBU 1202 can be physically arranged together or physically separated, that is, a distributed base station.

[0268] The BBU 1202 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU (processing unit) 1202 can be used to control the base station to execute the operation process of the network device in the above method embodiment.

[0269] In one example, the BBU1202 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE system or a 5G system), or may respectively support wireless access networks of different access standards. The BBU1202 also includes a memory 12021 and a processor 12022. The memory 12021 is used to store necessary instructions and data. For example, the memory 12021 stores the codebook in the above embodiment, etc. The processor 12022 is used to control the base station to perform necessary actions, such as controlling the base station to execute the operation process of the network device in the above method embodiment. The memory 12021 and the processor 12022 can serve one or more single boards. In other words, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be set on each single board.

[0270] In a possible implementation, with the development of system-on-chip (SoC) technology, all or part of the functions of parts 1202 and 1201 can be implemented by SoC technology, for example, by a base station function chip, which integrates devices such as a processor, a memory, and an antenna interface, and the program of the base station-related functions is stored in the memory, and the processor executes the program to implement the relevant functions of the base station. Optionally, the base station function chip can also read the memory outside the chip to implement the relevant functions of the base station.

[0271] It should also be understood that the division of units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And the units in the device can all be implemented in the form of software calling through processing elements; they can also be all implemented in the form of hardware; some units can also be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and called and executed by a certain processing element of the device. The processing element here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or in the form of software calling through a processing element. In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASIC), or one or more digital signal processors (DSP), or one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0272] The present application also provides a chip system, such as Fig.13 As shown, the chip system includes at least one processor 1310 and at least one interface circuit 1320. The processor 1310 and the interface circuit 1320 can be interconnected via lines. For example, the interface circuit 1320 can be used to receive signals from other devices (such as the memory of the terminal device 1100). For another example, the interface circuit 1320 can be used to send signals to other devices (such as the processor 1310). Exemplarily, the interface circuit 1320 can read the instructions stored in the memory and send the instructions to the processor 1310. When the instructions are executed by the processor 1310, the terminal device can execute the various steps executed by the terminal device in the above-mentioned embodiment. Of course, the chip system can also include other discrete devices, which are not specifically limited in the embodiments of the present application.

[0273] An embodiment of the present application also provides a communication system, which includes: the network device (for example, a serving base station) and the terminal device (for example, an MSS terminal, etc.) provided in the above method embodiment.

[0274] The embodiment of the present application also provides a computer-readable storage medium for storing computer program code, wherein the computer program includes instructions for executing any one of the communication methods provided in the above-mentioned embodiment of the present application. The readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiment of the present application.

[0275] The present application also provides a computer program product, which includes instructions. When the instructions are executed, the serving base station, the source base station, the target base station and the terminal device perform corresponding operations corresponding to the above method.

[0276] The embodiment of the present application further provides a chip in a communication device, the chip comprising: a processing unit and a communication unit, the processing unit, for example, may be a processor, the communication unit, for example, may be an input / output interface, a pin or a circuit, etc. The processing unit may execute computer instructions to enable the communication device to execute any one of the communication methods provided in the embodiment of the present application.

[0277] Optionally, the computer instructions are stored in a storage unit.

[0278] Optionally, the storage unit is a storage unit within the chip, such as a register, a cache, etc. The storage unit can also be a storage unit located outside the chip within the terminal, such as a ROM or other types of static storage devices that can store static information and instructions, random RAM, etc. Among them, the processor mentioned in any of the above can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the above-mentioned feedback information transmission method. The processing unit and the storage unit can be decoupled and respectively set on different physical devices, and connected by wired or wireless means to implement the respective functions of the processing unit and the storage unit to support the system chip to implement the various functions in the above-mentioned embodiments. Alternatively, the processing unit and the memory can also be coupled on the same device.

[0279] Among them, the terminal device, computer-readable storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0280] It is understood that the memory in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a ROM, a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an electrically erasable programmable read-only memory (electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a RAM, which is used as an external cache. There are many different types of RAM, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (doubledata rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DRRAM).

[0281] Various objects such as various messages / information / equipment / network elements / systems / devices / actions / operations / processes / concepts that may appear in this application are named. It can be understood that these specific names do not constitute a limitation on the relevant objects. The names assigned may change with factors such as scenarios, contexts or usage habits. The understanding of the technical meaning of the technical terms in this application should be mainly determined from the functions and technical effects embodied / executed in the technical scheme.

[0282] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0283] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0284] The method in the embodiment of the present application 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 programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program or instruction can be stored in a computer-readable storage medium or transmitted via the computer-readable storage medium. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server that integrates one or more available media.

[0285] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0286] In the several embodiments provided in the present 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 schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0287] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0288] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0289] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a readable storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned readable storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0290] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method is applied to a serving base station, and the method includes: A first indication message is sent, where the first indication message is used to indicate that the cell does not allow the MSS terminal to access, or the frequency band corresponding to the cell does not allow the MSS terminal to access.

2. The method according to claim 1, characterized in that The MSS terminal is a movable terminal in the non-terrestrial network NTN.

3. The method according to claim 1 or 2, characterized in that: The first indication message is carried in a master information block MIB or a system information block SIB1.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: A second indication message is sent, where the second indication message is used to indicate other inter-frequency points and whether the inter-frequency points allow the MSS terminal to access.

5. The method according to claim 4, characterized in that The second indication message is carried in SIB4.

6. A communication method, characterized in that: The method is applied to an MSS terminal, and the method comprises: receiving a first indication message, where the first indication message is used to indicate that a cell does not allow an MSS terminal to access, or that a frequency band corresponding to the cell does not allow the MSS terminal to access; Access to the cell is denied based on the first indication message.

7. The method according to claim 6, characterized in that The MSS terminal is a movable terminal in the non-terrestrial network NTN.

8. The method according to claim 6 or 7, characterized in that: The first indication message is carried in SIB1 or MIB.

9. The method according to any one of claims 6 to 8, characterized in that: The method further comprises: receiving a second indication message sent, where the second indication message is used to indicate other inter-frequency points and whether the inter-frequency points allow the MSS terminal to access; Perform inter-frequency point measurement according to the second indication message.

10. The method according to claim 9, characterized in that The second indication message is carried in SIB4.

11. A communication method, characterized in that: The method is applied to a serving base station, and the method includes: Obtain frequency information of neighboring base stations and information of terminal devices, wherein the frequency information includes: frequency and whether the frequency allows MSS terminals to access, and the terminal device information includes type information and service information, wherein the type information includes MSS terminals and FSS terminals; A measurement configuration is sent to the terminal device according to the frequency information of the neighboring base station and the information of the terminal device, where the frequency in the measurement configuration is the frequency that the MSS terminal is allowed to access.

12. The method according to claim 11, characterized in that The obtaining of frequency information of neighboring base stations includes: Receive an Xn message sent by the neighboring cell base station, where the Xn message carries the frequency information, and the Xn message includes any one of an Xn establishment message and an NG-RAN node configuration update message.

13. The method according to claim 11 or 12, characterized in that: The obtaining the type information of the terminal device includes: Receive user auxiliary information sent by the terminal device, where the user auxiliary information indicates type information of the terminal device.

14. The method according to claim 11 or 12, characterized in that: The obtaining the type information of the terminal device includes: Receive capability reporting information of the terminal device, where the capability reporting information indicates type information of the terminal device.

15. The method according to claim 11 or 12, characterized in that: The obtaining of the service information of the terminal device includes: Obtain the contract information sent by the mobility management function AMF, where the contract information indicates the service information of the terminal device.

16. A communication method, characterized in that: The method is applied to a target base station, and the method includes: receiving a handover request sent by a source base station, the handover request carrying information of a terminal device, the information of the terminal device including category information and service information, the category information including an MSS terminal and an FSS terminal; Determine whether to allow the MSS terminal to access based on the frequency information of the current cell and the information of the terminal device; A handover request feedback message is sent to the source base station, where the handover request feedback message includes: allowing the MSS terminal to access or not allowing the MSS terminal to access.

17. A communication method, characterized in that: The method is applied to a source base station, and the method includes: Sending a handover request message to at least one target base station, the handover request message carrying frequency query information, the frequency query information including: querying the frequency of the current cell corresponding to the target base station and whether the frequency allows the MSS terminal to access; receiving a handover request feedback message sent by the at least one target base station, the handover request feedback message carrying frequency feedback information, the frequency feedback information including a frequency of a current cell respectively corresponding to the at least one target base station and whether the frequency allows the MSS terminal to access; The target switching cell is determined based on at least one frequency feedback information and the information of the terminal device, the frequency corresponding to the target switching cell supports the access of the MSS terminal, the information of the terminal device includes type information and service information, and the type information includes MSS terminals and FSS terminals.

18. A communication method, characterized in that: The method is applied to a target base station, and the method includes: Receive a handover request message sent by a source base station, the handover request message carrying frequency query information, the frequency query information including: querying the frequency of a current cell corresponding to a target base station and whether the frequency allows an MSS terminal to access; Based on the handover request message, send handover request feedback information to the source base station, the handover request feedback information carries frequency feedback information, the frequency feedback information includes the frequency of the current cell corresponding to at least one target base station and whether the frequency allows the MSS terminal to access; The frequency feedback information is used by the source base station to determine a target switching cell, and the frequency corresponding to the target switching cell supports access by the terminal device.

19. A communication device, characterized in that: The apparatus comprises at least one processor coupled to at least one memory: The at least one processor is used to execute the computer program or instructions in the at least one memory so that the method as claimed in any one of claims 1 to 5 is executed, or so that the method as claimed in any one of claims 6 to 10 is executed, or so that the method as claimed in any one of claims 11 to 15 is executed, or so that the method as claimed in claim 16 is executed, or so that the method as claimed in claim 17 is executed, or so that the method as claimed in claim 18 is executed.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instructions. When the computer reads and executes the computer program or instructions, the computer executes the method as claimed in any one of claims 1 to 5, or executes the method as claimed in any one of claims 6 to 10, or executes the method as claimed in any one of claims 11 to 15, or executes the method as claimed in claim 16, or executes the method as claimed in claim 17, or executes the method as claimed in claim 18.

21. A chip, characterized in that: include: A processor for executing the method as claimed in any one of claims 1 to 5, or executing the method as claimed in any one of claims 6 to 10, or executing the method as claimed in any one of claims 11 to 15, or executing the method as claimed in claim 16, or executing the method as claimed in claim 17, or executing the method as claimed in claim 18.

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