Signaling sending method, context migration method of terminal equipment and network equipment

Abstract

The embodiment of the invention relates to a signaling sending method, a context migration method of terminal equipment and network equipment, and the signaling sending method comprises the steps that first network equipment receives a connection recovery request; under the condition that the connection recovery request is sent by the terminal equipment when small data transmission (SDT) is initiated, the first network equipment sends a first signaling to second network equipment, and the first signaling comprises first indication information; the first indication information is used for indicating that the purpose of initiating the connection recovery request by the terminal equipment is to execute the SDT. According to the invention, the source base station can obtain the auxiliary information, and the auxiliary information is used for the source base station to decide whether to execute the UE context migration or not.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a signaling sending method, a context migration method of a terminal device, and a network device. Background Art

[0002] In the 5G New Radio (NR) system, the Radio Resource Control (RRC) state of the User Equipment (UE) is divided into three types: RRC idle state (RRC_IDLE), RRC inactive state (RRC_INACTIVE), and RRC connected state (RRC_CONNECTED). Among them, the inactive state is a new state introduced by the 5G system from the perspective of energy saving. For the inactive UE, the radio bearer and all radio resources will be released, but the UE side and the base station side retain the UE access context to quickly restore the RRC connection. The network usually keeps UEs with infrequent data transmission in an inactive state. Before Rel-16, UEs in an inactive state did not support data transmission. When MO or MT data arrived, the UE needed to restore the connection and release it to the inactive state after the data transmission was completed. For UEs with small data volume and low transmission frequency, such a transmission mechanism will cause unnecessary power consumption and signaling overhead. Therefore, Rel-17 initiated a project to study small data transmission in the inactive state. According to the research conclusion, for the scenario of performing small data transmission (SDT) after cell reselection, the UE context can be retained in the source base station or migrated from the source base station to the target base station. Currently, the source base station cannot obtain the auxiliary information used to decide whether to perform UE context migration. Summary of the invention

[0003] Embodiments of the present application provide a signaling sending method, a context migration method for a terminal device, and a network device.

[0004] The present application embodiment provides a signaling sending method, including:

[0005] The first network device receives a connection recovery request;

[0006] When a connection recovery request is sent by a terminal device when initiating a small data transmission SDT, the first network device sends a first signaling to the second network device, and the first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

[0007] The present application also provides a context migration method for a terminal device, including:

[0008] The second network device receives the first signaling from the first network device, and determines whether the first signaling includes first indication information; wherein the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT;

[0009] The second network device determines whether to execute context migration of the terminal device according to the result of the determination.

[0010] The embodiment of the present application further provides a first network device, including:

[0011] A first receiving module, configured to receive a connection recovery request;

[0012] The first sending module is used to send a first signaling to the second network device when a connection recovery request is sent by the terminal device when initiating SDT. The first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

[0013] The embodiment of the present application further provides a second network device, including:

[0014] A second receiving module, configured to receive a first signaling from a first network device;

[0015] A determination module, used to determine whether the first signaling includes first indication information; wherein the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT;

[0016] The determination module is used to determine whether to execute the context migration of the terminal device according to the judgment result.

[0017] An embodiment of the present application further proposes a network device, comprising: a processor, a memory and a transceiver, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory and control the transceiver to execute any of the methods described above.

[0018] The embodiment of the present application further proposes a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes any of the methods described above.

[0019] The embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute any of the methods described above.

[0020] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute any of the methods described above.

[0021] The embodiment of the present application also provides a computer program, which enables a computer to execute any of the methods described above.

[0022] In an embodiment of the present application, a first network device sends first indication information to a second network device, so that the second network device can obtain auxiliary information for deciding whether to perform UE context migration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0024] Figure 2 It is a schematic flowchart of a signaling sending method 200 according to an embodiment of the present application.

[0025] Figure 3 It is a schematic flow chart of implementation method 300 of embodiment 1 of the present application.

[0026] Figure 4 It is a schematic flow chart of implementation method 400 of embodiment 2 of the present application.

[0027] Figure 5 It is a schematic flowchart of an implementation method 500 for a source base station to determine whether to perform UE context migration according to an embodiment of the present application.

[0028] Figure 6 It is a flow chart of an implementation method 600 of UE context migration according to an embodiment of the present application.

[0029] Figure 7 It is a schematic diagram of the structure of the first network device 700 according to an embodiment of the present application.

[0030] Figure 8 It is a schematic diagram of the structure of a second network device 800 according to an embodiment of the present application.

[0031] Fig. 9 It is a schematic structural diagram of a communication device 900 according to an embodiment of the present application.

[0032] Fig.10 is a schematic structural diagram of a chip 1000 according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The objects described by the "first" and "second" described at the same time may be the same or different.

[0035] 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), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system or other communication systems.

[0036] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0037] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0038] The embodiments of the present application do not limit the spectrum to which they are applied. For example, the embodiments of the present application can be applied to licensed spectrum or unlicensed spectrum.

[0039] The embodiments of the present application describe various embodiments in combination with network devices and terminal devices, wherein: the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, 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, and a next-generation communication system, for example, a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0040] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0041] The network device can be a device used to communicate with a mobile device. The network device can be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0042] In an embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0043] Figure 1 An exemplary network device 110 and two terminal devices 120 are shown. Optionally, the wireless communication system 100 may include multiple network devices 110, and each network device 110 may include other number of terminal devices 120 within its coverage area, which is not limited in the present embodiment. The present embodiment may be applied to one terminal device 120 and one network device 110, or to one terminal device 120 and another terminal device 120.

[0044] Optionally, the wireless communication system 100 may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc., which is not limited in the embodiments of the present application.

[0045] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0047] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0048] The embodiments of the present application can be applied to the scenario where the UE performs SDT after cell reselection occurs. Figure 2 is a schematic flow chart of a signaling sending method 200 according to an embodiment of the present application, which method can optionally be applied to Figure 1 The system shown in the figure is not limited thereto. The method includes at least part of the following contents.

[0049] S210: The first network device receives a connection recovery request;

[0050] S220: When the connection recovery request is sent by the terminal device when initiating SDT, the first network device sends a first signaling to the second network device, and the first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

[0051] The first network device may be a target base station after the terminal reselects a cell, and the second network device may be a source base station before the terminal reselects a cell.

[0052] Optionally, in the above step S210, the first network device receives a first message from the terminal device, and the first message includes the connection recovery request. Optionally, the above connection recovery request includes an inactive-radio network temporary identifier (I-RNTI, Inactive-Radio Network Temporary Identity); the first network device can determine the second network device based on the I-RNTI.

[0053] It can be seen that the embodiment of the present application can help the source base station decide whether to perform UE context migration by having the target base station carry the above-mentioned first indication information.

[0054] Optionally, the first indication information may be carried in an RRC connection resumption cause (Resume Cause) information element (IE, Information Element); or, the first indication information may be carried in a first IE.

[0055] Among them, the above-mentioned RRC Resume Cause IE is an IE defined in the prior art, and the IE can be carried in messages such as an RRC resumption request message (RRCResumeRequest), an RRC resumption request 1 (RRCResumeRequest1) message, and an RRC connection resumption request (RRCConnection ResumeRequest) message.

[0056] The first IE mentioned above may be a newly defined IE.

[0057] Optionally, the first signaling may further include first list information; the first list information includes encryption and / or integrity protection algorithms supported by the first network device (such as the target base station).

[0058] The first list information can be used as another auxiliary information to help the source base station decide whether to perform UE context migration. In the following embodiments, the specific manner in which the source base station decides whether to perform UE context migration according to the first indication information and / or the first list information will be described in detail.

[0059] In addition to the first indication information and the first list information, the first signaling may also include other information included in the RETRIEVE UE CONTEXT REQUEST request, such as at least one of the following:

[0060] UE CONTEXT ID:

[0061] The identifier (Cell ID) of the cell to which the first network device belongs.

[0062] The following specific embodiments are used to describe in detail the above signaling sending method and an example in which the second network device (such as the source base station) uses the received information to determine whether to perform UE context migration. In the following embodiments, the first network device is specifically a target base station, and the second network device is specifically a source base station.

[0063] Embodiment 1:

[0064] Figure 3300 is a schematic flow chart of the implementation method of Example 1 of the present application. Figure 3 As shown, Example 1 includes the following steps:

[0065] S301: The UE initiates an SDT process in a target cell, and the target base station receives a first message sent by the UE, where the first message at least includes a connection recovery request.

[0066] S302: The target base station addresses the source base station through the I-RNTI included in the connection recovery request, and sends a first signaling to the source base station, where the first signaling includes at least the following information:

[0067] (1) First indication information: The first indication information is used to inform the source base station that the purpose of the UE initiating the current connection resumption request is to perform SDT. Optionally, the first indication information may be carried by an RRC Resume Cause ID, or a new IE may be introduced as the first indication information.

[0068] (2) Other information contained in the RETRIEVE UE CONTEXT REQUEST, such as UE CONTEXT ID, Cell ID, etc.

[0069] S303: After receiving the first signaling sent by the target base station, the source base station determines whether the first indication information is included; if included, UE context migration is not performed; if not included, the source base station determines whether to perform UE context migration based on other factors.

[0070] In this embodiment, the target base station provides the first indication information to the source base station to help the source base station decide whether to perform UE context migration according to the information.

[0071] Embodiment 2:

[0072] In this embodiment, the target base station provides the source base station with the first indication information and the first list information to help the source base station decide whether to perform UE context migration according to the information.

[0073] Figure 4 400 is a schematic flow chart of the implementation method of Embodiment 2 of the present application. Figure 4 As shown, embodiment 2 includes the following steps:

[0074] S401: The UE initiates an SDT process in a target cell, and the target base station receives a first message sent by the UE, where the first message at least includes a connection recovery request.

[0075] S402: The target base station addresses the source base station through the I-RNTI included in the connection recovery request, and sends a first signaling to the source base station, where the first signaling includes at least the following information:

[0076] (1) First indication information: The first indication information is used to inform the source base station that the purpose of the UE initiating the current connection resumption request is to perform SDT. Optionally, the first indication information may be carried by an RRC Resume Cause ID, or a new IE may be introduced as the first indication information.

[0077] (2) First list information: The first list information includes a list of encryption and / or integrity protection algorithms currently supported by the target base station;

[0078] (3) Other information contained in the RETRIEVE UE CONTEXT REQUEST, such as UE CONTEXT ID, Cell ID, etc.

[0079] S403: After receiving the first signaling sent by the target base station, the source base station determines whether the following conditions are met:

[0080] The first signaling includes first indication information;

[0081] The encryption and / or integrity protection algorithm of the context of the terminal device is not included in the first list information.

[0082] If both of the above conditions are met, UE context migration is not performed;

[0083] If at least one of the above two conditions is not met, the source base station determines whether to perform UE context migration in combination with other factors.

[0084] The above two conditions can be judged simultaneously, or one after the other.

[0085] For example, Figure 5 It is a schematic flow chart of an implementation method 500 of a source base station determining whether to perform UE context migration according to an embodiment of the present application, including:

[0086] S501: The source base station determines whether the first signaling includes the first indication information. If so, step S502 is executed. If not, step S503 is executed.

[0087] S502: The source base station determines whether the encryption and / or integrity protection algorithm of the context of the terminal device is included in the first list information. If it is not included in the first list information, the UE context migration is not performed; if it is included in the first list information, step S503 is performed;

[0088] S503: The source base station determines whether to perform UE context migration based on other factors.

[0089] The present application also provides a UE context migration method. Figure 66 is a flowchart of a UE context migration method 600 according to an embodiment of the present application, including:

[0090] S610: The second network device receives a first signaling from the first network device, and determines whether the first signaling includes first indication information; wherein the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT;

[0091] S620: The second network device determines whether to perform context migration of the terminal device according to the result of the determination.

[0092] The first network device may be a target base station after the terminal reselects a cell, and the second network device may be a source base station before the terminal reselects a cell.

[0093] Optionally, the above step S620 may include:

[0094] When the first signaling includes the first indication information, the second network device does not perform context migration of the terminal device;

[0095] Furthermore, the above S620 may include: when the first signaling does not include the first indication information, the second network device determines whether to perform the context migration of the terminal device according to preset factors.

[0096] In some implementations, the first signaling includes first list information, where the first list information includes encryption and / or integrity protection algorithms supported by the first network device;

[0097] Accordingly, the above step S620 may include: when the following conditions are all met, the second network device does not perform context migration of the terminal device:

[0098] The first signaling includes first indication information;

[0099] The encryption and / or integrity protection algorithm of the context of the terminal device is not included in the first list information.

[0100] Furthermore, the above step S620 may also include: when at least one of the above conditions is not satisfied, the second network device determines whether to perform context migration of the terminal device according to preset factors.

[0101] Optionally, the first indication information is carried in an RRC Resume Cause IE; or, the first indication information is carried in a first IE.

[0102] Optionally, the first signaling further includes at least one of the following:

[0103] The context identifier of the terminal device;

[0104] An identifier of the cell to which the first network device belongs.

[0105] It can be seen that in the scenario where SDT is performed after UE cell reselection, providing auxiliary information to the source base station through the target base station can help the source base station decide whether to perform UE context migration. In addition, an embodiment of the present application proposes a specific method for the source base station to determine whether to perform UE context migration. When it is determined according to the auxiliary information that the purpose of the terminal device initiating the connection recovery request is for SDT, the source base station does not perform UE context migration. If the target base station provides the source base station with an encryption and / or integrity protection algorithm supported by the target base station, then when it is determined that the purpose of the terminal device initiating the connection recovery request is for SDT, it is further determined whether the encryption and / or integrity protection algorithm of the UE context belongs to the encryption and / or integrity protection algorithm supported by the target base station. If not, the source base station does not perform UE context migration.

[0106] The embodiment of the present application further provides a first network device, Figure 7 7 is a schematic diagram of the structure of a first network device 700 according to an embodiment of the present application, including:

[0107] A first receiving module 710, configured to receive a connection recovery request;

[0108] The first sending module 720 is used to send a first signaling to the second network device when the connection recovery request is sent by the terminal device when initiating SDT. The first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

[0109] The first network device may be a target base station after the terminal reselects a cell, and the second network device may be a source base station before the terminal reselects a cell.

[0110] Optionally, the first signaling further includes first list information;

[0111] The first list information includes encryption and / or integrity protection algorithms supported by the first network device.

[0112] Optionally, the first indication information is carried in an RRC Resume Cause IE; or, the first indication information is carried in a first IE.

[0113] Optionally, the first signaling further includes at least one of the following:

[0114] The context identifier of the terminal device;

[0115] An identifier of the cell to which the first network device belongs.

[0116] Optionally, the I-RNTI in the connection recovery request;

[0117] The first sending module determines the second network device according to the I-RNTI.

[0118] Optionally, the first receiving module 710 is configured to receive a first message from a terminal device, where the first message includes the connection recovery request.

[0119] It should be understood that the above and other operations and / or functions of the modules in the first network device according to the embodiment of the present application are respectively to implement Figure 2 The corresponding process of the first network device in the method 200 is not repeated here for the sake of brevity.

[0120] The embodiment of the present application further provides a second network device, Figure 8 8 is a schematic diagram of the structure of a second network device 800 according to an embodiment of the present application, including:

[0121] The second receiving module 810 is used to receive a first signaling from a first network device;

[0122] The judging module 820 is configured to judge whether the first signaling includes first indication information; wherein the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT;

[0123] The determination module 830 is used to determine whether to execute the context migration of the terminal device according to the judgment result.

[0124] The first network device may be a target base station after the terminal reselects a cell, and the second network device may be a source base station before the terminal reselects a cell.

[0125] Optionally, the above-mentioned determination module 830 is used to: when the first signaling includes first indication information, determine not to perform context migration of the terminal device.

[0126] Optionally, the above-mentioned determination module 830 is used to: when the first signaling does not include the first indication information, determine whether to perform the context migration of the terminal device according to preset factors.

[0127] Optionally, the first signaling includes first list information, and the first list information includes encryption and / or integrity protection algorithms supported by the first network device;

[0128] Accordingly, the determination module 830 is used to determine not to perform context migration of the terminal device when the following conditions are all met:

[0129] The first signaling includes first indication information;

[0130] The encryption and / or integrity protection algorithm of the context of the terminal device is not included in the first list information.

[0131] Optionally, the determination module 830 is further configured to: when at least one of the above conditions is not satisfied, determine whether to perform context migration of the terminal device according to a preset factor:

[0132] Optionally, the first indication information is carried in an RRC Resume Cause IE; or, the first indication information is carried in a first IE.

[0133] Optionally, the first signaling further includes at least one of the following:

[0134] The context identifier of the terminal device;

[0135] An identifier of the cell to which the first network device belongs.

[0136] It should be understood that the above and other operations and / or functions of the modules in the second network device according to the embodiment of the present application are respectively to implement Figure 6 The corresponding process of the second network device in method 600 is not repeated here for the sake of brevity.

[0137] It should be noted that the functions described in the various modules (submodules, units or components, etc.) in the first network device 700 and the second network device 800 in the embodiment of the present application can be implemented by different modules (submodules, units or components, etc.) or by the same module (submodule, unit or component, etc.). In addition, the sending module and the receiving module in the embodiment of the present application can be implemented by the transceiver of the device, and part or all of the other modules can be implemented by the processor of the device.

[0138] Fig. 9 It is a schematic structural diagram of a communication device 900 according to an embodiment of the present application. Fig. 9 The communication device 900 shown includes a processor 910, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0139] Alternatively, if Fig. 9 As shown, the communication device 900 may further include a memory 920. The processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.

[0140] The memory 920 may be a separate device independent of the processor 910 , or may be integrated into the processor 910 .

[0141] Alternatively, if Fig. 9As shown, the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0142] The transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include an antenna, and the number of antennas may be one or more.

[0143] Optionally, the communication device 900 may be the first network device of the embodiment of the present application, and the communication device 900 may implement the corresponding processes implemented by the first network device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0144] Optionally, the communication device 900 may be the second network device of the embodiment of the present application, and the communication device 900 may implement the corresponding processes implemented by the second network device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0145] Fig.10 is a schematic structural diagram of a chip 1000 according to an embodiment of the present application. Fig.10 The chip 1000 shown includes a processor 1010, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0146] Alternatively, if Fig.10 As shown, the chip 1000 may further include a memory 1020. The processor 1010 may call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.

[0147] The memory 1020 may be a separate device independent of the processor 1010 , or may be integrated into the processor 1010 .

[0148] Optionally, the chip 1000 may further include an input interface 1030. The processor 1010 may control the input interface 1030 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0149] Optionally, the chip 1000 may further include an output interface 1040. The processor 1010 may control the output interface 1040 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0150] Optionally, the chip can be applied to the first terminal device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first network device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0151] Optionally, the chip can be applied to the second network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second network device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0152] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0153] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or other programmable logic devices, transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0154] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM).

[0155] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be 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 (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0156] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0157] It should be understood that in the various embodiments of the present application, 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.

[0158] 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.

[0159] 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 signaling sending method, comprising: The first network device receives a connection recovery request; In the case where the connection recovery request is sent by the terminal device when initiating a small data transmission SDT, the first network device sends a first signaling to the second network device, and the first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

2. According to the method of claim 1, the first signaling further comprises first list information; The first list information includes encryption and / or integrity protection algorithms supported by the first network device.

3. The method according to claim 1 or 2, wherein: The first indication information is carried in a radio resource control connection resumption cause RRC Resume Cause information element IE; or, The first indication information is carried in the first IE.

4. The method according to any one of claims 1 to 3, wherein: The first signaling further includes at least one of the following: The context identifier of the terminal device; An identifier of the cell to which the first network device belongs.

5. The method according to any one of claims 1 to 4, wherein: The connection recovery request includes an inactive state-radio network temporary identifier I-RNTI; The first network device determines the second network device according to the I-RNTI.

6. A first network device, comprising: A first receiving module, configured to receive a connection recovery request; The first sending module is used to send a first signaling to the second network device when the connection recovery request is sent by the terminal device when initiating SDT, and the first signaling includes first indication information; the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT.

7. The first network device according to claim 6, wherein the first signaling further comprises first list information; The first list information includes encryption and / or integrity protection algorithms supported by the first network device.

8. The first network device according to claim 6 or 7, wherein: The first indication information is carried in a radio resource control connection resumption cause RRC Resume Cause information element IE; or, The first indication information is carried in the first IE.

9. The first network device according to any one of claims 6 to 8, wherein: The first signaling further includes at least one of the following: The context identifier of the terminal device; An identifier of the cell to which the first network device belongs.

10. The first network device according to any one of claims 6 to 9, wherein: The connection recovery request includes an inactive state-radio network temporary identifier I-RNTI; The first sending module determines the second network device according to the I-RNTI.

11. A second network device, comprising: A second receiving module, configured to receive a first signaling from a first network device; A determination module, configured to determine whether the first signaling includes first indication information; wherein the first indication information is used to indicate that the purpose of the terminal device initiating the connection recovery request is to execute SDT; The determination module is used to determine whether to execute the context migration of the terminal device according to the result of the judgment.

12. The second network device according to claim 11, wherein the determining module is configured to: When the first indication information is included in the first signaling, it is determined not to perform context migration of the terminal device.

13. The second network device according to claim 11, wherein the determining module is configured to: When the first signaling does not include the first indication information, whether to execute the context migration of the terminal device is determined according to preset factors.

14. The second network device according to claim 11, wherein the first signaling includes first list information, and the first list information includes encryption and / or integrity protection algorithms supported by the first network device; The determining module is used to determine not to perform context migration of the terminal device when the following conditions are all met: The first signaling includes first indication information; The encryption and / or integrity protection algorithm of the context of the terminal device is not included in the first list information.

15. The second network device according to claim 14, wherein the determining module is further configured to: When at least one of the following conditions is not met, whether to perform context migration of the terminal device is determined according to preset factors: The first signaling includes first indication information; The encryption and / or integrity protection algorithm of the context of the terminal device is not included in the first list information.

16. The second network device according to any one of claims 11 to 15, wherein: The first indication information is carried in the RRC Resume Cause IE; or, The first indication information is carried in the first IE.

17. The second network device according to any one of claims 11 to 15, wherein: The first signaling further includes at least one of the following: The context identifier of the terminal device; An identifier of the cell to which the first network device belongs.

18. A network device comprising: A processor, a memory and a transceiver, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory and control the transceiver to execute the method according to any one of claims 1 to 5.

19. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 5.

20. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 5.

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