Method and apparatus for wireless communication

Abstract

The embodiment of the present application discloses a method and device for wireless communication, the method comprising: obtaining access layer context identification information of a first terminal device, the access layer context identification information of the first terminal device is used to identify the access layer context information of the first terminal device on a first access network device about the first terminal device; determining the first access network device according to the access layer context identification information of the first terminal device, so that a second access network device providing network services for the first terminal device obtains the access layer context information of the first terminal device from the first access network device. The method and device of the embodiment of the present application are conducive to reducing network overhead.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and more specifically, to a method and device for wireless communications. Background Art

[0002] In the fifth generation (5G) communication system, when a terminal has no service for a period of time, in order to save air interface resources and terminal power, the terminal can be turned into an idle or inactive state. When a terminal device moves from one cell to another, the access layer context information of the terminal needs to be reconfigured by the access network device of the current cell, resulting in a large network overhead. Summary of the invention

[0003] In view of this, an embodiment of the present application provides a method and device for wireless communication, which is conducive to reducing network overhead.

[0004] In a first aspect, a method for wireless communication is provided, the method comprising: obtaining access layer context identification information of a first terminal device, the access layer context identification information of the first terminal device being used to identify the access layer context information of the first terminal device about the first terminal device in a first access network device; determining the first access network device based on the access layer context identification information of the first terminal device, so that a second access network device that provides network services to the first terminal device obtains the access layer context information of the first terminal device from the first access network device.

[0005] In a possible implementation, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0006] By changing the format of the UE AS Context ID of the terminal device so that the UE AS Context ID does not directly contain the identification of the access network device, the terminal device can obtain the identification of the access network device through implicit indication, and then obtain the access layer context information of the terminal device from the access layer device that stores the access layer context information of the terminal device. The purpose of protecting the security and privacy of the network and users on the air interface can be achieved.

[0007] In a possible implementation, the first access network device is determined based on the access layer context identification information of the first terminal device, including: determining the first access network device based on the access layer context identification information of the first terminal device and a first mapping relationship, the first mapping relationship being a mapping relationship between the access layer context identification information of at least one terminal device and an identification of at least one access network device, and the at least one terminal device includes the first terminal device.

[0008] In a possible implementation, the first mapping relationship is a one-to-one mapping relationship between at least one access layer context identification information and an identification of the at least one access network device, and the at least one access layer context identification information includes the access layer context identification information of the first terminal device.

[0009] In a possible implementation, the first mapping relationship is a one-to-one mapping relationship between at least one number segment information and an identifier of the at least one access network device, and the at least one number segment information includes the number segment information of the access layer context identifier information of the first terminal device.

[0010] In a possible implementation manner, the first mapping relationship is preconfigured in the at least one access network device, and the at least one access network device includes the second access network device.

[0011] In a possible implementation manner, the first mapping relationship is pre-configured in a network node dedicated to parsing access layer context identification information to obtain an identification of the access network device.

[0012] In a possible implementation, the first access network device is determined based on the access layer context identification information of the first terminal device, including: querying the first mapping relationship and obtaining the identification of the first access network device based on the access layer context identification information of the first terminal device obtained from the second access network device.

[0013] In a possible implementation manner, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0014] In a possible implementation, obtaining access layer context identification information of the first terminal device includes: when the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, obtaining the access layer context identification information of the first terminal device.

[0015] In a second aspect, a method for wireless communication is provided, the method comprising: obtaining access layer context identification information of the first terminal device, the access layer context identification information being used to identify the access layer context information of the first terminal device about the first terminal device in the first access network device; sending the access layer context identification information to a second access network device that provides network services for the first terminal device, so that the second access network device obtains the access layer context information from the first access network device corresponding to the access layer context identification information.

[0016] In a possible implementation, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0017] In a possible implementation manner, the access layer context identification information has a mapping relationship with an identification of the first access network device.

[0018] In a possible implementation manner, the number segment information of the access layer context identifier has a mapping relationship with the identifier of the first access network device.

[0019] In a possible implementation manner, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0020] In one possible implementation, the access layer context identification information is sent to a second access network device that provides network services to a first terminal device, including: when the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, sending the access layer context identification information to the second access network device.

[0021] In a possible implementation, sending the access layer context identification information to a second access network device that provides network services to a first terminal device includes: sending an RRC recovery request message to the second access network device, wherein the RRC recovery request message carries the access layer context identification information.

[0022] In a third aspect, a device for wireless communication is provided, which is used to execute the method in the first aspect or any possible implementation of the first aspect. Specifically, the device includes a unit for executing the method in the first aspect or any possible implementation of the first aspect.

[0023] In a fourth aspect, a device for wireless communication is provided, which is used to execute the method in the second aspect or any possible implementation of the second aspect. Specifically, the device includes a unit for executing the method in the second aspect or any possible implementation of the second aspect.

[0024] In a fifth aspect, a device is provided, the device comprising: a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface, and the output interface are connected via a bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so as to execute the method in the first aspect or any possible implementation of the first aspect.

[0025] In a sixth aspect, a device is provided, the device comprising: a memory, a processor, an input interface, and an output interface. The memory, the processor, the input interface, and the output interface are connected via a bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so as to execute the method in the second aspect or any possible implementation of the second aspect.

[0026] In the seventh aspect, a computer storage medium is provided for storing computer software instructions 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, which includes programs designed for executing the above aspects.

[0027] In the eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method in the first aspect or any optional implementation of the first aspect, or the method in the second aspect or any optional implementation of the second aspect, or the method in the third aspect or any optional implementation of the third aspect.

[0028] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram showing an application scenario of an embodiment of the present application.

[0030] Figure 2 A schematic block diagram of a method for wireless communication according to an embodiment of the present application is shown.

[0031] Figure 3 Another schematic block diagram of a method for wireless communication according to an embodiment of the present application is shown.

[0032] Figure 4 A schematic block diagram of a device for wireless communication according to an embodiment of the present application is shown.

[0033] Figure 5 Another schematic block diagram of a device for wireless communication according to an embodiment of the present application is shown.

[0034] Figure 6 Another schematic block diagram of a device for wireless communication according to an embodiment of the present application is shown.

[0035] Figure 7 Another schematic block diagram of a device for wireless communication according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] 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.

[0037] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 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), 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, New Radio (NR) or future 5G system, etc.

[0038] In particular, the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technology, such as sparse code multiple access (SCMA) system, low density signature (LDS) system, etc. Of course, the SCMA system and the LDS system may also be called other names in the field of communication; further, the technical solutions of the embodiments of the present application can be applied to multi-carrier transmission systems using non-orthogonal multiple access technology, such as orthogonal frequency division multiplexing (OFDM), filter bank multi-carrier (FBMC), generalized frequency division multiplexing (GFDM), filtered orthogonal frequency division multiplexing (F-OFDM) system, etc.

[0039] The terminal device in the embodiments of the present application may refer to a user equipment (UE), 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 access terminal may 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.

[0040] In the embodiments of the present application, the network device may be a device for communicating with a terminal device. The network device may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB, NB) in a 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 network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0041] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application. Figure 1 The communication system in the embodiment may include a terminal device 10 and a network device 20. The network device 20 is used to provide communication services for the terminal device 10 and access the core network. The terminal device 10 accesses the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 20, thereby communicating with the network. Figure 1 The arrows shown in may represent uplink / downlink transmissions performed via a cellular link between the terminal device 10 and the network device 20 .

[0042] Figure 2 FIG. 1 is a schematic block diagram of a method 100 for wireless communication according to an embodiment of the present application. Figure 2As shown, the method may be executed by a network device, such as an access network device. The method 100 includes part or all of the following contents:

[0043] S110, obtaining access layer context identification information of a first terminal device, where the access layer context identification information of the first terminal device is used to identify access layer context information of the first terminal device about the first terminal device in a first access network device.

[0044] S120, determining the first access network device according to the access layer context identification information of the first terminal device, so that the second access network device providing network services to the first terminal device obtains the access layer context information of the first terminal device from the first access network device.

[0045] Specifically, when a terminal device moves from a cell covered by one access network device to a cell covered by another access network device and the access layer context information of the terminal device is stored in the previous access network device, if the terminal device initiates a service at this time, the current access network device can obtain the access layer context identification information of the terminal device from the terminal device or the core network device, and the access layer context identification information can also be used to indicate the previous access network device. Then, the current access network device can parse the access layer context identification information of the terminal device. Further, the current access network device can determine the access network device where the access layer context information is stored based on the access layer context identification information, so that the current access network device can obtain the access layer context information from the access network device that stores the access layer context information. Optionally, after the current access network device receives the access layer context identification information sent by the terminal device or the core network device, the current access network device cannot parse the identification of the access network device that stores the access layer context information of the terminal device. In this case, the current access network device can forward the access layer context identification information to a network node that specializes in parsing the identification of access network devices. After the network node parses the identification, the parsed identification of the access network device can be sent to the current access network device, and the current access network device can then obtain the access layer context information from the parsed access network device.

[0046] Therefore, the method for wireless communication in the embodiment of the present application is conducive to reducing network overhead.

[0047] Optionally, in an embodiment of the present application, obtaining the access layer context identification information of the first terminal device includes: when the first terminal device is in an inactive radio resource control (Radio Resource Control, RRC) state and has data to be transmitted, obtaining the access layer context identification information of the first terminal device.

[0048] In 5G, in order to reduce air interface signaling and quickly restore wireless connections and data services, a new RRC state is defined, namely the RRC inactive state. When the UE is in the RRC inactive state, the connection between the Radio Access Network (RAN) and the Core Network (CN) for the UE is maintained and not released. When downlink data arrives, the RAN initiates a paging message to wake up the UE to perform RRC connection recovery and receive data. When the UE has uplink data to send, the UE autonomously performs the RRC connection recovery process and sends data. When the UE is in the RRC inactive state, both the UE and the RAN side save the UE's current UE access stratum (AS) context. In order to identify this context, the network side will assign an identity (ID) to the UE, namely the UE AS Context ID, which can also be the UE resume (Resume) identity. When a terminal device in the RRC inactive state initiates a service, the access stratum context identification information of the terminal device can be obtained, that is, the above-mentioned UE AS Context ID.

[0049] Optionally, in an embodiment of the present application, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0050] Specifically, the UE AS Context ID of the embodiment of the present application is different from the UE AS Context ID in the prior art, because the UE AS Context ID in the prior art is transmitted in plain text in the RRC recovery request message, and the UE AS Context ID contains the base station ID information. For example, the existing UE AS Context ID includes 40 bits of information, of which the first 20 bits are the identifier of the access network device. Therefore, the exposure of this information will reveal the internal structure of the network and also affect the user's privacy rights, because it indicates the context storage node of the UE, etc. Therefore, the method for wireless communication in the embodiment of the present application changes the UE AS Context ID format of the terminal device so that the UE AS Context ID does not directly include the identifier of the access network device. The terminal device can obtain the identifier of the access network device through implicit indication, and then obtain the access layer context information of the terminal device from the access layer device that stores the access layer context information of the terminal device. The purpose of protecting the security and privacy of the network and users on the air interface can be achieved.

[0051] Optionally, in an embodiment of the present application, the first access network device is determined based on the access layer context identification information of the first terminal device, including: determining the first access network device based on the access layer context identification information of the first terminal device and a first mapping relationship, the first mapping relationship being a mapping relationship between the access layer context identification information of at least one terminal device and the identification of at least one access network device, and the at least one terminal device includes the first terminal device.

[0052] It should be understood that the UE AS Context ID may be different from the UE AS Context ID in the prior art. For example, the UE AS Context ID may be a random bit stream or number, and does not directly contain the identifier of the access network device storing the UE ASContext. There is a mapping relationship between the UE AS Context ID and the access network device storing the UE AS Context, and the mapping relationship may be stored in a device for acquiring the UE AS Context ID, for example, the mapping relationship may be stored in the above-mentioned second access network device. Alternatively, the mapping relationship may also be stored in a network node dedicated to parsing access layer context identification information to obtain the identifier of the access network device.

[0053] Optionally, the mapping relationship may be a mapping table, which may include mapping relationships between UEAS Context IDs of multiple terminal devices and identifiers of multiple access network devices, and the multiple terminal devices may include the first terminal device.

[0054] Optionally, the mapping table may be a one-to-one mapping relationship between the UE AS Context ID of the terminal device and the identifier of the access network device, or may be one-to-many, for example, the UE AS Context IDs of multiple terminal devices may correspond to the identifier of one access network device.

[0055] Optionally, the mapping relationship may also be a correspondence between the UE AS Context ID and other information of the access network device, for example, it may be the correspondence between the UE AS Context ID and the location information of the access network device. In short, as long as it is a mapping relationship between the UE AS Context ID and the information that can uniquely identify an access network device, it can be within the protection scope of the embodiments of the present application.

[0056] Optionally, the mapping relationship may also be a mapping relationship between the number segment information of the access layer context identifiers of multiple terminal devices and multiple access network devices. It should be understood that it can be agreed that the UE AS ContextID allocated by the same access network device belongs to the same number segment. For example, a certain access network device can pre-configure a mapping relationship between a number segment and the identifier of the access network device through operation administration and maintenance (Operation Administration and Maintenance, OAM), and can obtain the mapping relationship between the identifiers of other access network devices and the number segment. Then, after obtaining the access layer context identifier of the terminal device, it is possible to first obtain which number segment the access layer context identifier information belongs to, and then the corresponding access layer device identifier can be queried and obtained based on the mapping relationship between the number segment information and the identifier of the access layer device.

[0057] Optionally, in an embodiment of the present application, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0058] Those skilled in the art understand that after the terminal device establishes the access layer context information of the terminal device at the first access network device, the first access network device can instruct the terminal device to enter the RRC inactive state. Then, the first access layer device can also assign an identification information to the access layer context information of the terminal device, which is the UE AS Context ID in the embodiment of the present application.

[0059] The following describes the embodiments of the present application from the perspective of different devices that have the function of parsing the access layer context identifier of a terminal device to obtain the identifier of the access layer device.

[0060] Optionally, the device having the above-mentioned parsing function may be the above-mentioned second access network device.

[0061] Specifically, the first terminal device can send the access layer context identification information of the first terminal device to the second access network device, and the second access network device can determine the first access network device, such as the identification of the first access network device, based on the access layer context identification information of the first terminal device and the above-mentioned various mapping relationships. The second access network device can then send a request to the first access network device to obtain the access layer context information of the first terminal device, and the first access network device can send the access layer context information of the first terminal device to the second access network device based on the request. After receiving the access layer context information of the first terminal device, the second access network device can communicate wirelessly with the first terminal device.

[0062] Optionally, the device having the above-mentioned parsing function may be on a network node specifically responsible for parsing the access layer context identifier.

[0063] Specifically, the first terminal device can send the access layer context identification information of the first terminal device to the second access network device, and the second access network device can forward the access layer context identification information of the first terminal device to the network node. The network node can determine the first access network device, such as the identification of the first access network device, based on the access layer context identification information of the first terminal device and the above-mentioned various mapping relationships. The network node can send the determined identification of the first access network device to the second access network device, and the second access network device can then send a request to the first access network device to obtain the access layer context information of the first terminal device. The first access network device can send the access layer context information of the first terminal device to the second access network device based on the request. After receiving the access layer context information of the first terminal device, the second access network device can communicate wirelessly with the first terminal device.

[0064] Figure 3 FIG. 2 is a schematic block diagram of a method 200 for wireless communication according to an embodiment of the present application. Figure 3 As shown, the method can be executed by a terminal device, and the method 200 includes part or all of the following contents:

[0065] S210: Acquire access layer context identification information of the first terminal device, where the access layer context identification information is used to identify access layer context information of the first terminal device about the first terminal device in the first access network device.

[0066] S220, sending the access layer context identification information to the second access network device that provides network services for the first terminal device, so that the second access network device obtains the access layer context information of the first terminal device from the first access network device corresponding to the access layer context identification information.

[0067] Therefore, the method for wireless communication in the embodiment of the present application is conducive to reducing network overhead.

[0068] Optionally, in an embodiment of the present application, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0069] By changing the format of the UE AS Context ID of the terminal device so that the UE AS Context ID does not directly contain the identification of the access network device, the terminal device can obtain the identification of the access network device through implicit indication, and then obtain the access layer context information of the terminal device from the access layer device that stores the access layer context information of the terminal device. The purpose of protecting the security and privacy of the network and users on the air interface can be achieved.

[0070] Optionally, in an embodiment of the present application, the access layer context identification information has a mapping relationship with an identification of the first access network device.

[0071] Optionally, in an embodiment of the present application, the number segment information of the access layer context identifier has a mapping relationship with the identifier of the first access network device.

[0072] Optionally, in an embodiment of the present application, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0073] Optionally, in an embodiment of the present application, the access layer context identification information is sent to the second access network device that provides network services to the first terminal device, including: when the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, the access layer context identification information is sent to the second access network device.

[0074] Optionally, in an embodiment of the present application, sending the access layer context identification information to a second access network device that provides network services to the first terminal device includes: sending an RRC recovery request message to the second access network device, wherein the RRC recovery request message carries the access layer context identification information.

[0075] The method for wireless communication according to the embodiment of the present application is described in detail above. Figures 4 to 7 , describing an apparatus for wireless communication according to an embodiment of the present application, the technical features described in the method embodiment are applicable to the following apparatus embodiments.

[0076] Figure 4 FIG. 1 is a schematic block diagram of a device 300 for wireless communication according to an embodiment of the present application. Figure 4 As shown, the device 300 includes:

[0077] An acquiring unit 310 is configured to acquire access layer context identification information of a first terminal device, where the access layer context identification information of the first terminal device is used to identify access layer context information of the first terminal device on a first access network device about the first terminal device;

[0078] The determination unit 320 is used to determine the first access network device according to the access layer context identification information of the first terminal device, so that the second access network device that provides network services to the first terminal device obtains the access layer context information of the first terminal device from the first access network device.

[0079] Therefore, the device for wireless communication according to the embodiment of the present application is helpful in reducing network overhead.

[0080] Optionally, in an embodiment of the present application, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0081] By changing the format of the UE AS Context ID of the terminal device so that the UE AS Context ID does not directly contain the identification of the access network device, the terminal device can obtain the identification of the access network device through implicit indication, and then obtain the access layer context information of the terminal device from the access layer device that stores the access layer context information of the terminal device. The purpose of protecting the security and privacy of the network and users on the air interface can be achieved.

[0082] Optionally, in an embodiment of the present application, the determination unit is specifically used to: determine the first access network device based on the access layer context identification information of the first terminal device and a first mapping relationship, wherein the first mapping relationship is a mapping relationship between the access layer context identification information of at least one terminal device and the identification of at least one access network device, and the at least one terminal device includes the first terminal device.

[0083] Optionally, in an embodiment of the present application, the first mapping relationship is a one-to-one mapping relationship between the access layer context identification information of the at least one terminal device and the at least one access network device identification.

[0084] Optionally, in an embodiment of the present application, the first mapping relationship is a one-to-one mapping relationship between at least one number segment information and an identifier of at least one access network device, and the at least one number segment information includes the number segment information of the access layer context identifier information of the first terminal device.

[0085] Optionally, in an embodiment of the present application, the device is the second access network device, the first mapping relationship is pre-configured in at least one access network device, and the at least one access network device includes the second access network device.

[0086] Optionally, in an embodiment of the present application, the device is a network node dedicated to parsing access layer context identification information to obtain an identification of an access network device, and the first mapping relationship is pre-configured in the network node.

[0087] Optionally, in an embodiment of the present application, the determination unit is specifically used to: query the first mapping relationship and obtain the identification of the first access network device according to the access layer context identification information of the first terminal device obtained from the second access network device.

[0088] Optionally, in an embodiment of the present application, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0089] Optionally, in an embodiment of the present application, the acquisition unit is specifically used to: when the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, acquire access layer context identification information of the first terminal device.

[0090] It should be understood that the device 300 according to the embodiment of the present application may correspond to the execution subject in the embodiment of the method 100 of the present application, and the above and other operations and / or functions of each unit in the device 300 are respectively to implement Figure 2 For the sake of brevity, the corresponding process of executing the subject in the method will not be repeated here. Figure 5 FIG. 4 is a schematic block diagram of a device 400 for wireless communication according to an embodiment of the present application. Figure 5 As shown, the device is a first terminal device, and the device 400 includes:

[0091] An acquiring unit 410 is configured to acquire access layer context identification information of the first terminal device, where the access layer context identification information is used to identify access layer context information of the first terminal device about the first terminal device in the first access network device;

[0092] The sending unit 420 is used to send the access layer context identification information to the second access network device that provides network services for the first terminal device, so that the second access network device obtains the access layer context information from the first access network device corresponding to the access layer context identification information.

[0093] Therefore, the device for wireless communication according to the embodiment of the present application is helpful in reducing network overhead.

[0094] Optionally, in an embodiment of the present application, the number or bit stream used to identify the information of the first access network device in the access layer context identification information of the first terminal device is different from the number or bit stream of the identification of the first access network device.

[0095] By changing the format of the UE AS Context ID of the terminal device so that the UE AS Context ID does not directly contain the identification of the access network device, the terminal device can obtain the identification of the access network device through implicit indication, and then obtain the access layer context information of the terminal device from the access layer device that stores the access layer context information of the terminal device. The purpose of protecting the security and privacy of the network and users on the air interface can be achieved.

[0096] Optionally, in this embodiment of the present application, the access layer context identification information has a mapping relationship with an identification of the first access network device.

[0097] Optionally, in this embodiment of the present application, the number segment information of the access layer context identifier has a mapping relationship with the identifier of the first access network device.

[0098] Optionally, in an embodiment of the present application, the access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

[0099] Optionally, in an embodiment of the present application, the sending unit is specifically used to: when the first terminal device is in a radio resource control RRC inactive state and there is data to be transmitted, send the access layer context identification information to the second access network device.

[0100] Optionally, in an embodiment of the present application, the sending unit is specifically used to: send an RRC recovery request message to the second access network device, and the RRC recovery request message carries the access layer context identification information.

[0101] It should be understood that the device 400 according to the embodiment of the present application may correspond to the execution subject in the embodiment of the method 200 of the present application, and the above and other operations and / or functions of each unit in the device 400 are respectively to implement Figure 3 For the sake of brevity, the corresponding process of executing the subject in the method will not be repeated here.

[0102] like Figure 6 As shown, the embodiment of the present application also provides a device 500 for wireless communication, which can be Figure 4 The device 300 in which can be used to perform Figure 2The content of the device corresponding to the method 100. The device 500 includes: an input interface 510, an output interface 520, a processor 530 and a memory 540, and the input interface 510, the output interface 520, the processor 530 and the memory 540 can be connected through a bus system. The memory 540 is used to store programs, instructions or codes. The processor 530 is used to execute the programs, instructions or codes in the memory 540 to control the input interface 510 to receive signals, control the output interface 520 to send signals, and complete the operations in the aforementioned method embodiment.

[0103] Therefore, the device for wireless communication according to the embodiment of the present application is helpful in reducing network overhead.

[0104] It should be understood that in the embodiment of the present application, the processor 530 may be a central processing unit (CPU), and the processor 530 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0105] The memory 540 may include a read-only memory and a random access memory, and provide instructions and data to the processor 530. A portion of the memory 540 may also include a nonvolatile random access memory. For example, the memory 540 may also store information on the device type.

[0106] In the implementation process, the contents of the above method can be completed by the hardware integrated logic circuit in the processor 530 or the instructions in the form of software. The contents of the method disclosed in the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 540, and the processor 530 reads the information in the memory 540 and completes the contents of the above method in combination with its hardware. To avoid repetition, it is not described in detail here.

[0107] In a specific implementation manner, the acquisition unit and the determination unit of the device 300 may be composed of Figure 6 The processor 530 in is implemented.

[0108] like Figure 7 As shown, the embodiment of the present application also provides a device 600 for wireless communication, which can be Figure 5 The device 400 in which can be used to perform Figure 3 The content of the first terminal device corresponding to the method 200. The device 600 includes: an input interface 610, an output interface 620, a processor 630 and a memory 640, and the input interface 610, the output interface 620, the processor 630 and the memory 640 can be connected through a bus system. The memory 640 is used to store programs, instructions or codes. The processor 630 is used to execute the programs, instructions or codes in the memory 640 to control the input interface 610 to receive signals, control the output interface 620 to send signals, and complete the operations in the aforementioned method embodiment.

[0109] Therefore, the device for wireless communication according to the embodiment of the present application is helpful in reducing network overhead.

[0110] It should be understood that in the embodiment of the present application, the processor 630 may be a central processing unit (CPU), and the processor 630 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0111] The memory 640 may include a read-only memory and a random access memory, and provides instructions and data to the processor 630. A portion of the memory 640 may also include a nonvolatile random access memory. For example, the memory 640 may also store information on the device type.

[0112] In the implementation process, the contents of the above method can be completed by the hardware integrated logic circuit in the processor 630 or the instructions in the form of software. The contents of the method disclosed in the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in the processor for execution. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 640, and the processor 630 reads the information in the memory 640 and completes the contents of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0113] In a specific implementation manner, the sending unit of the device 400 may be composed of Figure 7 The output interface 620 in the device 400 can be implemented by Figure 7 The processor 630 in is implemented.

[0114] 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.

[0115] 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.

[0116] 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 unit 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.

[0117] 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.

[0118] 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.

[0119] If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a 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 each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., and other media that can store program codes.

[0120] 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 method for wireless communication, characterized in that: The method is performed by a second access network device that provides a network service for a first terminal device, and includes: Acquire access layer context identification information of the first terminal device, where the access layer context identification information of the first terminal device is used to identify access layer context information, and the access layer context information is access layer context information of the first terminal device in the first access network device; Determine the first access network device according to the access layer context identification information of the first terminal device, so that the second access network device providing network services for the first terminal device obtains the access layer context information of the first terminal device from the first access network device; The information used to identify the first access network device in the access layer context identification information of the first terminal device is different from the identification of the first access network device, and the access layer context identification information does not directly include the identification of the first access network device; The determining the first access network device according to the access layer context identification information of the first terminal device includes: The first access network device is determined based on the access layer context identification information of the first terminal device and a first mapping relationship, where the first mapping relationship is a mapping relationship between the access layer context identification information of at least one terminal device and the identification of at least one access network device.

2. The method according to claim 1, characterized in that The first mapping relationship is a one-to-one mapping relationship between at least one access layer context identification information and an identification of the at least one access network device, and the at least one access layer context identification information includes the access layer context identification information of the first terminal device.

3. The method according to claim 1, characterized in that The first mapping relationship is a one-to-one mapping relationship between at least one number segment information and the identifier of the at least one access network device, and the at least one number segment information includes the number segment information of the access layer context identifier information of the first terminal device.

4. The method according to any one of claims 1 to 3, characterized in that The first mapping relationship is pre-configured in the at least one access network device, and the at least one access network device includes the second access network device.

5. The method according to any one of claims 1 to 3, characterized in that The first mapping relationship is pre-configured in a network node dedicated to parsing access layer context identification information to obtain the identification of the access network device.

6. The method according to claim 5, characterized in that The determining the first access network device according to the access layer context identification information of the first terminal device includes: According to the access layer context identification information of the first terminal device obtained from the second access network device, the first mapping relationship is queried and the identification of the first access network device is obtained.

7. The method according to any one of claims 1 to 3, characterized in that The access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

8. The method according to any one of claims 1 to 3, characterized in that The acquiring access layer context identification information of the first terminal device includes: When the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, the access layer context identification information of the first terminal device is obtained.

9. A method for wireless communication, characterized in that: The method is performed by a first terminal device and includes: Acquire access layer context identification information of the first terminal device, where the access layer context identification information is used to identify access layer context information, and the access layer context information is access layer context information of the first terminal device in the first access network device; Sending the access layer context identification information to a second access network device that provides network services for the first terminal device, so that the second access network device obtains the access layer context information from the first access network device corresponding to the access layer context identification information; The information used to identify the first access network device in the access layer context identification information of the first terminal device is different from the identification of the first access network device, and the access layer context identification information does not directly include the identification of the first access network device; There is a mapping relationship between the access layer context identification information and the identification of the first access network device.

10. The method according to claim 9, characterized in that The number segment information of the access layer context identifier has a mapping relationship with the identifier of the first access network device.

11. The method according to claim 9 or 10, characterized in that: The access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

12. The method according to claim 9 or 10, characterized in that: The sending the access layer context identification information to the second access network device that provides network services for the first terminal device includes: When the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, the access layer context identification information is sent to the second access network device.

13. The method according to claim 9 or 10, characterized in that: The sending the access layer context identification information to the second access network device that provides network services for the first terminal device includes: An RRC recovery request message is sent to the second access network device, wherein the RRC recovery request message carries the access layer context identification information.

14. An access network device, the access network device being a second access network device providing network services for a first terminal device, characterized in that: The second access network device includes: An acquiring unit, configured to acquire access layer context identification information of the first terminal device, where the access layer context identification information of the first terminal device is used to identify access layer context information, where the access layer context information is access layer context information of the first terminal device in a first access network device; a determining unit, configured to determine the first access network device according to the access layer context identification information of the first terminal device, so that a second access network device providing network services for the first terminal device obtains the access layer context information of the first terminal device from the first access network device; The information used to identify the first access network device in the access layer context identification information of the first terminal device is different from the identification of the first access network device, and the access layer context identification information does not directly include the identification of the first access network device; The determining unit is specifically used for: The first access network device is determined based on the access layer context identification information of the first terminal device and a first mapping relationship, wherein the first mapping relationship is a mapping relationship between the access layer context identification information of at least one terminal device and the identification of at least one access network device, and the at least one terminal device includes the first terminal device.

15. The access network device according to claim 14, characterized in that: The first mapping relationship is a one-to-one mapping relationship between at least one access layer context identification information and an identification of the at least one access network device, and the at least one access layer context identification information includes the access layer context identification information of the first terminal device.

16. The access network device according to claim 14, characterized in that: The first mapping relationship is a one-to-one mapping relationship between at least one number segment information and the identifier of the at least one access network device, and the at least one number segment information includes the number segment information of the access layer context identifier information of the first terminal device.

17. The access network device according to any one of claims 14 to 16, characterized in that: The device is the second access network device, the first mapping relationship is pre-configured in at least one access network device, and the at least one access network device includes the second access network device.

18. The access network device according to any one of claims 14 to 16, characterized in that: The device is a network node dedicated to parsing access layer context identification information to obtain an identification of an access network device, and the first mapping relationship is pre-configured in the network node.

19. The access network device according to claim 18, characterized in that: The determining unit is specifically used for: According to the access layer context identification information of the first terminal device obtained from the second access network device, the first mapping relationship is queried and the identification of the first access network device is obtained.

20. The access network device according to any one of claims 14 to 16, characterized in that: The access layer context identification information of the first terminal device is pre-allocated by the first access network device to the first terminal device.

21. The access network device according to any one of claims 14 to 16, characterized in that: The acquisition unit is specifically used for: When the first terminal device is in a radio resource control RRC inactive state and has data to be transmitted, the access layer context identification information of the first terminal device is obtained.

22. A terminal device, characterized in that: The terminal device comprises: An acquiring unit, configured to acquire access layer context identification information of the terminal device, wherein the access layer context identification information is used to identify access layer context information, and the access layer context information is access layer context information of the terminal device in a first access network device; a sending unit, configured to send the access layer context identification information to a second access network device that provides network services for a terminal device, so that the second access network device acquires the access layer context information from the first access network device corresponding to the access layer context identification information; The information used to identify the first access network device in the access layer context identification information of the terminal device is different from the identification of the first access network device, and the access layer context identification information does not directly include the identification of the first access network device; There is a mapping relationship between the access layer context identification information and the identification of the first access network device.

23. The terminal device according to claim 22, characterized in that: The number segment information of the access layer context identifier has a mapping relationship with the identifier of the first access network device.

24. The terminal device according to claim 22 or 23, characterized in that: The access layer context identification information of the terminal device is pre-allocated to the terminal device by the first access network device.

25. The terminal device according to claim 22 or 23, characterized in that: The sending unit is specifically used for: When the terminal device is in a radio resource control RRC inactive state and has data to be transmitted, the access layer context identification information is sent to the second access network device.

26. The terminal device according to claim 22 or 23, characterized in that: The sending unit is specifically used for: An RRC recovery request message is sent to the second access network device, wherein the RRC recovery request message carries the access layer context identification information.

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