Priority information updating method and device and storage medium

Abstract

The invention provides a priority information updating method and device and a storage medium, and relates to the technical field of communication. The method is applied to a terminal device, and the method comprises the following steps: when first frequency point priority information for cell reselection is invalid, sending an RRC connection request message to a first network device; and receiving a first RRC connection release message sent by the first network device, the first RRC connection release message comprising first indication information, and the first indication information being used for indicating second frequency point priority information for cell reselection. According to the invention, when the priority information used for cell reselection of the terminal equipment is invalid, the priority information can be updated for the terminal equipment, so that the continuity of the multicast service of the terminal equipment is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a priority information updating method, device and storage medium. Background Art

[0002] Multicast broadcast service (MBS) is a multimedia communication service for group users, supporting multicast service and broadcast service.

[0003] The fifth generation (5G) communication system supports terminal devices to receive multicast service data in an inactive state. Currently, when a network device releases a terminal device receiving multicast service data from a connected state to an inactive state, it configures the terminal device with frequency priority information for cell reselection through a Radio Resource Control (RRC) connection release message. The frequency priority information takes into account the multicast service that the terminal device is receiving or is interested in receiving, and is used to ensure the continuity of the multicast service of the terminal device in an inactive state.

[0004] However, when the frequency priority information used for cell reselection becomes invalid, how to update the frequency priority information used for cell reselection for the terminal device to ensure the continuity of the multicast service of the terminal device is an urgent problem to be solved. Summary of the invention

[0005] The present application provides a priority information updating method, device and storage medium, which solve the technical problem of how to update the frequency priority information used for cell reselection for a terminal device to ensure the continuity of the service of the terminal device.

[0006] In a first aspect, an embodiment of the present application provides a priority information updating method, the method being applied to a terminal device, the method comprising:

[0007] When the first frequency priority information used for cell reselection fails, sending an RRC connection request message to the first network device;

[0008] A first RRC connection release message sent by the first network device is received, where the first RRC connection release message includes first indication information, where the first indication information is used to indicate second frequency priority information for cell reselection.

[0009] Optionally, the terminal device is receiving multicast service data or has interesting multicast service data to receive.

[0010] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0011] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0012] Optionally, the method further comprises:

[0013] Receive a second RRC connection release message sent by a second network device, wherein the second RRC connection release message includes third indication information, and the third indication information is used to indicate the first frequency priority information and a first timer associated with the first frequency priority information; trigger entry into a non-connected state, and start the first timer.

[0014] The sending an RRC connection request message to the first network device when the first frequency priority information used for cell reselection fails includes:

[0015] When it is determined that the first timer has expired, the RRC connection request message is sent to the first network device.

[0016] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0017] Optionally, the type of the first timer and the type of the second timer are both related to the multicast service; or, the first timer and the second timer are both T320 timers.

[0018] In a second aspect, an embodiment of the present application provides a priority information updating method, the method being applied to a first network device, the method comprising:

[0019] Receive an RRC connection request message sent by a terminal device when first frequency priority information used for cell reselection is invalid; send a first RRC connection release message to the terminal device, the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information used for cell reselection.

[0020] Optionally, the method further comprises:

[0021] It is determined that the terminal device is receiving multicast service data or there is interesting multicast service data to be received.

[0022] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0023] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0024] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0025] Optionally, the type of the second timer is related to the multicast service; or, the second timer is a T320 timer.

[0026] In a third aspect, an embodiment of the present application provides a priority information updating device, the device being applied to a terminal device, the device comprising:

[0027] A sending unit is used to send an RRC connection request message to a first network device when the first frequency priority information used for cell reselection is invalid; a receiving unit is used to receive a first RRC connection release message sent by the first network device, the first RRC connection release message includes first indication information, and the first indication information is used to indicate the second frequency priority information used for cell reselection.

[0028] In a fourth aspect, an embodiment of the present application provides a priority information updating device, the device being applied to a first network device, the device comprising:

[0029] A receiving unit is used to receive an RRC connection request message sent by a terminal device when the first frequency priority information used for cell reselection is invalid; a sending unit is used to send a first RRC connection release message to the terminal device, wherein the first RRC connection release message includes first indication information, and the first indication information is used to indicate the second frequency priority information used for cell reselection.

[0030] In a fifth aspect, an embodiment of the present application provides a priority information updating device, which is applied to a terminal device, and the device includes a memory, a transceiver, and a processor; the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0031] When the first frequency priority information used for cell reselection becomes invalid, an RRC connection request message is sent to a first network device; a first RRC connection release message sent by the first network device is received, the first RRC connection release message includes first indication information, and the first indication information is used to indicate the second frequency priority information used for cell reselection.

[0032] Optionally, the terminal device is receiving multicast service data or has interesting multicast service data to receive.

[0033] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0034] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0035] Optionally, the processor is further configured to perform the following operations:

[0036] Receive a second RRC connection release message sent by a second network device, wherein the second RRC connection release message includes third indication information, and the third indication information is used to indicate the first frequency priority information and a first timer associated with the first frequency priority information; trigger entry into a non-connected state, and start the first timer.

[0037] The processor is configured to send an RRC connection request message to the first network device when the first frequency priority information used for cell reselection fails, specifically including:

[0038] When it is determined that the first timer has expired, the RRC connection request message is sent to the first network device.

[0039] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0040] Optionally, the type of the first timer and the type of the second timer are both related to the multicast service; or, the first timer and the second timer are both T320 timers.

[0041] In a sixth aspect, an embodiment of the present application provides a priority information updating device, the device being applied to a first network device, the device comprising a memory, a transceiver, and a processor; the memory being used to store a computer program; the transceiver being used to send and receive data under the control of the processor; and the processor being used to read the computer program in the memory and perform the following operations:

[0042] A RRC connection request message is sent by a receiving terminal device when first frequency priority information used for cell reselection becomes invalid; a first RRC connection release message is sent to the terminal device, wherein the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information used for cell reselection.

[0043] Optionally, the processor is further configured to perform the following operations:

[0044] It is determined that the terminal device is receiving multicast service data or there is interesting multicast service data to be received.

[0045] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0046] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0047] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0048] Optionally, the type of the second timer is related to the multicast service; or, the second timer is a T320 timer.

[0049] In a seventh aspect, an embodiment of the present application provides a non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method described in the first aspect.

[0050] In an eighth aspect, an embodiment of the present application provides a non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method described in the second aspect.

[0051] The present application provides a priority information updating method, device and storage medium. When the first frequency priority information of a terminal device for cell reselection fails, an RRC connection request message can be sent to the network device to which the current cell belongs, triggering the network device to indicate the second frequency priority information for cell reselection to the terminal device through an RRC connection release message, so as to update the frequency priority information for cell reselection of the terminal device. Through the above method, it can be avoided that when the frequency priority information for cell reselection of the terminal device fails, the terminal device uses the frequency priority information for cell reselection broadcasted in the system message of the network device to which the current cell belongs to perform cell reselection, which may cause the problem of reselection to a cell that does not support the current service of the terminal and cannot ensure the continuity of the service of the terminal device, thereby ensuring that the terminal device uses the correct priority information for cell reselection, thereby ensuring the continuity of the service of the terminal device.

[0052] It should be understood that the contents described in the above summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0054] Figure 1 is a schematic diagram of a mobile communication system 100 applicable to an embodiment of the present application;

[0055] Figure 2 A flowchart of a priority information updating method provided in an embodiment of the present application;

[0056] Figure 3 A flowchart of another priority information updating method provided in an embodiment of the present application;

[0057] Figure 4 A schematic diagram of the structure of a priority information updating device provided in an embodiment of the present application;

[0058] Figure 5 A schematic diagram of the structure of another priority information updating device provided in an embodiment of the present application;

[0059] Figure 6 A schematic diagram of the structure of another priority information updating device provided in an embodiment of the present application;

[0060] Figure 7 A schematic diagram of the structure of another priority information updating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0062] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0063] The terms "first", "second", etc. in the embodiments of the present application are only used for illustration and distinction of the described objects. There is no order, nor does it indicate a special limitation on the number of objects in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application. For example, the first network device is a network device to which the cell where the terminal device is currently located belongs, and the second network device is a network device to which the cell where the terminal device was previously located when it was released from a connected state to a non-connected state belongs. The use of "first", "second", etc. is only to distinguish between different network devices, and does not indicate the difference in priority or importance of the two network devices.

[0064] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0065] The technical solution provided in the embodiment of the present application can be applicable to a variety of communication systems, especially 5G communication system (referred to as 5G system). For example, the applicable communication system can be a global system of mobilecommunication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, a future communication system, or a system integrating multiple communication systems, etc., which is not limited by the embodiment of the present application. These multiple communication systems include terminal equipment and network equipment. The communication system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0066] The technical solution provided in the embodiments of the present application can be applied to various communication scenarios, for example, it can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB) communication, ultra-reliable and low latency communication (URLLC), machine type communication (MTC), mMTC, device-to-device (D2D) communication, vehicle to everything (V2X) communication, vehicle to vehicle (V2V) communication, and Internet of Things (IoT), etc. Optionally, mMTC may include one or more of the following communications: industrial wireless sensor network (IWSN) communication, communication in video surveillance scenarios, and communication of wearable devices, etc.

[0067] Figure 1 1 is a schematic diagram of a mobile communication system 100 applicable to an embodiment of the present application. Figure 1 As shown, the mobile communication system 100 may include at least one network device, such as Figure 1 The mobile communication system 100 may also include at least one terminal device, such as Figure 1 The terminal devices 120, 130, and 140 shown. The network device and the terminal device can communicate or transmit, including: the network device sends a downlink signal to the terminal device, and / or the terminal device sends an uplink signal to the network device. Among them, the signal can also be replaced by information or data. In the embodiment of the present application, the network device 110 can interact with the terminal device to implement the update of the frequency priority information of the terminal device for cell reselection.

[0068] The terminal device involved in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0069] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0070] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0071] In the embodiment of the present application, the device for realizing the function of the terminal device may be a terminal device; or it may be a device capable of supporting the terminal device to realize the function, such as a chip system. The device may be installed in the terminal device or used in combination with the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the embodiment of the present application, the technical solution provided is described by taking the terminal device as an example of the device for realizing the function of the terminal device.

[0072] In the embodiment of the present application, the device for realizing the function of the network device may be a network device; or it may be a device capable of supporting the network device to realize the function, such as a chip system. The device may be installed in the network device or used in combination with the network device. In the embodiment of the present application, the technical solution provided is described by taking the device for realizing the function of the network device as an example that the network device is an example.

[0073] MBS is a multimedia communication service for group users. Through MBS technology, terminal devices can simultaneously receive the same multimedia content broadcast, such as on-demand, streaming media, live TV, etc. MBS supports multicast services and broadcast services.

[0074] The following takes the 5G system as an example to illustrate the multicast service.

[0075] There are three states of terminal devices in the 5G system: idle state, inactive state, and connected state. The 5G system supports terminal devices to receive multicast service data in connected state and inactive state.

[0076] At present, in order to enhance the continuity of receiving multicast service data by non-activated terminal devices, the non-activated terminal devices are supported to adopt a cell reselection mechanism based on frequency priority. That is, when the network device releases the terminal device receiving multicast service data from the connected state to the non-activated state, the terminal device is configured with frequency priority information for cell reselection through the RRC connection release message. The frequency priority information takes into account the multicast service being received by the terminal device or the multicast service data of interest to be received, so that after the terminal device enters the non-activated state, the frequency priority information is used for cell reselection, and the cell supporting the multicast service can be preferentially reselected, thereby ensuring the continuity of the multicast service of the terminal device.

[0077] The existence of multicast service data of interest to be received mentioned above can also be referred to as multicast service data of interest to be received, and the two have the same meaning in this application. It should be noted that the multicast service of interest to be received here can, for example, refer to a scenario in which the terminal device has obtained authorization for the multicast service from the core network side, but has not yet started to receive the multicast service data.

[0078] The frequency priority information for cell reselection may also be referred to as the frequency priority for cell reselection, or the frequency priority for cell reselection, etc., and the present application does not limit the names used. The frequency priority information is a parameter used by a terminal device when performing cell reselection, wherein the frequency refers to the frequency used by a cell under a network device. The frequency used by a cell corresponds to a priority, and a priority corresponds to a reselection mechanism. For how to perform cell reselection based on the priority information, please refer to the prior art, and the embodiments of the present application will not elaborate on this.

[0079] In some scenarios, when the network device configures the frequency priority information for cell reselection for the terminal device through the RRC connection release message, it also configures a T320 timer for the frequency priority information for cell reselection. The T320 timer is used to determine the expiration time of the frequency priority information for cell reselection. In some embodiments, the T320 timer may also be referred to as a t320 timer. In the embodiments of the present application, the two are equivalent and no distinction is made therebetween.

[0080] In this scenario, after the terminal device enters the inactive state, the T320 timer will be turned on. When the T320 timer times out, the terminal device discards the frequency priority information for cell reselection corresponding to the T320 timer, and uses the frequency priority information for cell reselection broadcast in the system message of the network device to which the current cell belongs to perform cell reselection.

[0081] Since the frequency priority information broadcast in the system message may not take into account the multicast service that the terminal device is currently receiving or is interested in receiving, when the terminal device uses the frequency priority information for cell reselection to reselect a cell, it may reselect to a cell that does not support the multicast service, thereby failing to ensure the continuity of the terminal device's multicast service.

[0082] Therefore, when the frequency priority information used for cell reselection becomes invalid, how to update the frequency priority information used for cell reselection for the terminal device to ensure the continuity of the multicast service of the terminal device is an urgent problem to be solved.

[0083] The embodiments of the present application provide a priority information updating method, device and storage medium to solve the technical problem of how to update the frequency priority information for cell reselection for a terminal device to ensure the continuity of the service of the terminal device. The service mentioned here can be, for example, the multicast service mentioned above, or other services, etc., which are not limited to this.

[0084] It should be understood that the methods, devices, and storage media provided in the embodiments of the present application are based on the same application concept. Since the methods, devices, and storage media solve problems in similar principles, the implementation of the methods, devices, and storage media can refer to each other, and the repeated parts will not be repeated.

[0085] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0086] Figure 2 A flowchart of a priority information updating method provided in an embodiment of the present application is shown as follows: Figure 2 As shown, the method may include the following steps:

[0087] S201. When first frequency priority information for cell reselection becomes invalid, a terminal device sends an RRC connection request message to a first network device. Correspondingly, the first network device receives the RRC connection request message.

[0088] Optionally, the terminal device is in a non-connected state, where the non-connected state may be, for example, an idle state or an inactive state.

[0089] Optionally, the first frequency priority information for cell reselection may be related to a service of the terminal device, and is used to ensure the continuity of the service of the terminal device during cell reselection. The service may be, for example, a multicast service.

[0090] Exemplarily, take the case where the terminal device is in a non-connected state and is receiving multicast service data or has interested multicast service data to receive, that is, the terminal device is currently in a non-connected multicast service scenario. In this scenario, the first frequency point priority information used for cell reselection may be, for example, priority information that takes into account the multicast service being received by the terminal device or the multicast service being received with interest, to ensure the continuity of the multicast service of the terminal device.

[0091] Optionally, the first frequency priority information for cell reselection may be, for example, indicated by an RRC connection release message when the second network device releases the terminal device from a connected state to a non-connected state. The second network device referred to here refers to the network device to which the cell to which the terminal device is located belongs when the terminal device is released from a connected state to a non-connected state.

[0092] The first network device is a network device to which the cell to which the terminal device belongs when the first frequency point priority information used for cell reselection fails. The second network device and the first network device may be the same network device or different network devices, which is specifically related to the movement of the terminal device after the second network device releases the terminal device from a connected state to a non-connected state. For example, when the first frequency point priority information used for cell reselection by the terminal device fails, and the cell to which the terminal device belongs is not a cell under the second network device, the first network device and the second network device are different network devices. When the first frequency point priority information used for cell reselection by the terminal device fails, and the cell to which the terminal device belongs is a cell under the second network device, the first network device and the second network device are the same network device.

[0093] The present application does not limit the manner in which the terminal device determines that the first frequency priority information used for cell reselection is invalid. For example, the invalidation may be caused by the first frequency priority information used for cell reselection exceeding its validity period, or by other factors.

[0094] Exemplarily, a first timer associated with the first frequency priority information for cell reselection may be provided on the terminal device side, and when the first frequency priority information for cell reselection is received, the first timer is started, and when the first timer times out, it is determined that the first frequency priority information for cell reselection is invalid. That is, when the first frequency priority information for cell reselection is invalid, the terminal device sends an RRC connection request message to the first network device, which may mean that when the first timer associated with the first frequency priority information for cell reselection times out, the terminal device sends an RRC connection request message to the first network device.

[0095] The first timer may be pre-configured for the terminal device, or may be indicated to the terminal device together with the first frequency priority information for cell reselection. And / or, the relevant information of the first timer (such as the duration corresponding to the first timer, the type of the first timer, etc.) may be pre-configured for the terminal device, or may be indicated to the terminal device together with the first frequency priority information for cell reselection.

[0096] As mentioned above, the terminal device may be in an idle state or an inactive state. When the terminal device is in an idle state, the RRC connection request message in this embodiment may be, for example, an RRC connection establishment request message; when the terminal device is in an inactive state, the RRC connection request message in this embodiment may be, for example, an RRC connection recovery request message.

[0097] Optionally, the RRC connection request message may carry second indication information to instruct the first network device to update the first frequency priority information for cell reselection through the second indication information. That is, the purpose of sending the RRC connection request message is to update the priority information for cell reselection explicitly indicated by the second indication information.

[0098] This application does not limit the implementation method of the above-mentioned second indication information to implement the above-mentioned indication. Exemplarily, the above-mentioned second indication information can be, for example, a cause value in an RRC connection request message. A possible implementation method can reuse the original cause value to implement the above-mentioned indication, or can add a cause value to implement the above-mentioned indication, and this application does not limit this. Optionally, a new field can also be added to the RRC connection request message to implement the above-mentioned second indication information, etc.

[0099] S202. The first network device sends a first RRC connection release message to the terminal device, wherein the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

[0100] Correspondingly, the terminal device receives the first RRC connection release message.

[0101] Optionally, the second frequency priority information used for cell reselection may be pre-stored on the first network device side, or may be obtained from the core network side when the first network device side receives an RRC connection request message from the terminal device.

[0102] The second frequency priority information for cell reselection may be related to the service of the terminal device, and is used to ensure the continuity of the service of the terminal device during cell reselection. The service may be, for example, a multicast service, to ensure the continuity of the multicast service of the terminal device. Exemplarily, each multicast service or each multicast service corresponds to a frequency priority information for cell reselection, etc., which is specifically related to the system implementation and / or the frequency used by the multicast service, and is not limited in this application.

[0103] In this implementation, optionally, before the above step S202, the first network device may also determine the current service of the terminal device. For example, if the current service is a multicast service, the first network device may determine that the terminal device is receiving multicast service data or has interesting multicast service data to receive.

[0104] Exemplarily, when the first network device is not the second network device that releases the terminal device from a connected state to a non-connected state, the first network device can obtain the context of the terminal device by interacting with the second network device, thereby determining the current service of the terminal device through the context of the terminal device. When the first network device is the second network device that releases the terminal device from a connected state to a non-connected state, the first network device can determine the current service of the terminal device through the context of the terminal device stored by itself.

[0105] It should be understood that the manner in which the first network device sends the first RRC release message to the terminal device depends on the internal implementation of the network device.

[0106] For example, the first network device may first accept a connection request message from the terminal device and convert the terminal device from a non-connected state to a connected state. Subsequently, when the first network device releases the terminal device from a connected state to a non-connected state, the first indication information of the first RRC connection release message indicates the second frequency priority information for cell reselection. In this implementation, the factors based on which the first network device releases the terminal device from a connected state to a non-connected state depend on the internal implementation of the network device, for example, it may be based on factors such as load conditions and / or business conditions of the terminal device.

[0107] For another example, the first network device may not convert the terminal device from a non-connected state to a connected state, but may continue to maintain the non-connected state of the terminal device and return a first RRC connection release message to the terminal device to indicate the second frequency priority information for cell reselection through the first indication information carried.

[0108] Exemplarily, taking the aforementioned RRC connection request message carrying the second indication information as an example, in this implementation mode, after the first network device determines through the RRC connection request message that the purpose of the terminal device sending the RRC connection request message is to update the frequency priority information for cell reselection, the terminal device may not be converted from a non-connected state to a connected state, but the first RRC connection release message may be directly returned to the terminal device to indicate the second frequency priority information for cell reselection through the carried first indication information. In this way, the updating efficiency of the frequency priority information for cell reselection of the terminal device can be improved, and in addition, unnecessary state switching of the terminal device can be reduced.

[0109] It should be noted that the embodiments of the present application do not limit how to carry the first indication information for indicating the second frequency priority information for cell reselection through the first RRC connection release message. For example, the existing method of carrying the indication information for indicating the second frequency priority information through the RRC connection release message can be adopted.

[0110] Optionally, the first indication information can also be used to indicate the second timer and / or related information of the second timer (such as the duration of the second timer and / or the type of the second timer, etc.) associated with the second frequency point priority information used for cell reselection, so as to indicate the validity period of the second frequency point priority information used for cell reselection, or to indicate the expiration time of the second frequency point priority information used for cell reselection.

[0111] The second timer mentioned here may be, for example, a T320 timer. Alternatively, the type of the second timer may be related to the terminal device being receiving a multicast service or being interested in receiving a multicast service. That is, the second timer may be a timer used by a newly added multicast service, or a timer dedicated to a newly added multicast service, or a new timer introduced for a scenario in which the terminal device is in a non-connected state and is receiving a multicast service or is interested in receiving a multicast service.

[0112] The priority information updating method provided in the embodiment of the present application can trigger the network device to indicate the second frequency priority information for cell reselection to the terminal device through an RRC connection release message by sending an RRC connection request message to the network device to which the current cell belongs, when the first frequency priority information for cell reselection of the terminal device fails, so as to update the frequency priority information for cell reselection of the terminal device. Through the above method, it can be avoided that when the frequency priority information for cell reselection of the terminal device fails, the terminal device uses the frequency priority information for cell reselection broadcasted in the system message of the network device to which the current cell belongs to perform cell reselection, which may cause the problem of reselection to a cell that does not support the current service of the terminal and cannot ensure the continuity of the service of the terminal device, thereby ensuring that the terminal device uses the correct priority information for cell reselection, thereby ensuring the continuity of the service of the terminal device.

[0113] The method of the embodiment of the present application is described below through a specific example.

[0114] Figure 3 A flow chart of another priority information updating method provided in an embodiment of the present application. In this embodiment, the terminal is in a connected state in the current cell. The network device to which the current cell belongs is a second network device.

[0115] like Figure 3 As shown, the method may include the following steps:

[0116] S301. The second network device sends a second RRC connection release message to the terminal device, wherein the second RRC connection release message includes third indication information, and the third indication information is used to indicate first frequency priority information for cell reselection and a first timer associated with the first frequency priority information for cell reselection.

[0117] Correspondingly, the terminal device receives the second RRC connection release message. The second RRC connection release message is used to release the terminal device from a connected state to a non-connected state, for example, an idle state or an inactive state.

[0118] The first frequency priority information for cell reselection indicated by the third indication information of the second RRC connection release message may, for example, take into account the current service of the terminal device and be used to ensure the continuity of the service of the terminal device. For example, it takes into account that the terminal device is receiving multicast service data or has interested multicast service data to be received. In other words, the first frequency priority information for cell reselection is related or associated with the multicast service that the terminal device is receiving or the multicast service of interest.

[0119] The first timer associated with the first frequency priority information used for cell reselection and indicated by the third indication information of the second RRC connection release message may be, for example, a T320 timer, or the type of the first timer may be related to the service of the terminal device.

[0120] Taking the case where the terminal device is receiving a multicast service or is interested in receiving a multicast service as an example, the type of the first timer may be related to the fact that the terminal device is receiving a multicast service or is interested in receiving a multicast service. That is, the first timer may be a timer used by a newly added multicast service, or a timer dedicated to a newly added multicast service, or a new timer introduced for a scenario in which the terminal device is in a non-connected state and is receiving a multicast service or is interested in receiving a multicast service. The first timer is used to characterize the validity period of the first frequency priority information for cell reselection indicated by the third indication information.

[0121] Regarding how the second RRC connection release message indicates the first frequency priority information for cell reselection through the third indication information, and the first timer associated with the first frequency priority information for cell reselection, please refer to the implementation method of indicating the priority information for cell reselection through the RRC connection release message, and the timer associated with the priority information for cell reselection in the prior art, which will not be repeated here.

[0122] It should be noted that the above-mentioned first frequency priority information for cell reselection can be pre-stored on the second network device side, or it can be obtained from the core network side when the second network device determines to release the terminal device from the connected state to the non-connected state.

[0123] S302: The terminal device triggers to enter a non-connected state and starts a first timer.

[0124] It should be understood that after entering the non-connected state, if the terminal device needs to reselect a cell due to mobility, it can first identify whether the first timer has timed out. If the first timer has not timed out, it means that the first frequency priority information for cell reselection indicated in the second RRC connection release message has not expired, and the terminal device can use the first frequency priority information for cell reselection to reselect the cell.

[0125] If the first timer times out, it indicates that the first frequency priority information for cell reselection indicated in the second RRC connection release message is invalid, and step S303 is executed.

[0126] S303: When the first timer times out, the terminal device sends an RRC connection request message to the first network device. Correspondingly, the first network device receives the RRC connection request message. The first network device is the network device to which the cell currently located of the terminal device belongs when the first timer times out.

[0127] For example, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0128] Optionally, the RRC connection request message may carry second indication information for instructing the first network device to update the first frequency priority information for cell reselection, so that the first network device learns through the second indication information that the purpose of the terminal device sending the RRC connection request message is to update the priority information for cell reselection. The second indication information may be, for example, a newly added cause value for instructing the first network device to update the priority information for cell reselection.

[0129] S304. The first network device sends a first RRC connection release message to the terminal device, wherein the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

[0130] Correspondingly, the terminal device receives the first RRC connection release message.

[0131] The second frequency priority information for cell reselection may, for example, take into account the service of the terminal device to ensure the continuity of the service of the terminal device. For example, the multicast service that the terminal device is receiving or the multicast service that it is interested in receiving. Taking the multicast service as an example, before the first network device sends the first RRC connection release message to the terminal device, it may also be determined that the terminal device is receiving multicast service data or there is interested multicast service data to be received.

[0132] It should be understood that the manner in which the first network device sends the first RRC release message to the terminal device depends on the internal implementation of the network device. For details, please refer to the description of the aforementioned step S203, which will not be repeated here.

[0133] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information used for cell reselection. For example, it may be a T320 second timer, or the type of the second timer may be related to the terminal device being able to receive a multicast service or being interested in receiving a multicast service. That is, the second timer may be a second timer used by a newly added multicast service, or a second timer dedicated to a newly added multicast service, or a new second timer introduced for a scenario in which the device is not in a connected state and is receiving a multicast service or is interested in receiving a multicast service. The second timer is used to characterize the validity period of the second frequency priority information used for cell reselection.

[0134] The priority information updating method provided in the embodiment of the present application, when the second network device releases the terminal device from the connected state to the unconnected state, the first frequency priority information for cell reselection is indicated through the RRC connection release message, and when the first timer associated with the first frequency priority information for cell reselection is used, the terminal device can trigger the first network device to which the current cell belongs through the RRC connection request message when the first timer times out, and indicate the second frequency priority information for cell reselection to it through the RRC connection release message, so as to update the frequency priority information for cell reselection. In the above manner, it can be avoided that the terminal device uses the frequency priority information broadcast in the system message of the network device to which the current cell belongs to perform cell reselection when the first frequency priority information for cell reselection is invalid, which may cause reselection to a cell that does not support the terminal device's service, thereby ensuring that the terminal device uses the correct frequency priority information for cell reselection, thereby ensuring the continuity of the terminal device's service.

[0135] Figure 4 A schematic diagram of the structure of a priority information updating device provided in an embodiment of the present application. Figure 4 As shown, the device 400 is applied to a terminal device, and the device 400 includes: a memory 410, a transceiver 420, and a processor 430;

[0136] The memory 410 is used to store computer programs; the transceiver 420 is used to send and receive data under the control of the processor 430; the processor 430 is used to read the computer program stored in the memory 410 and perform the following operations:

[0137] When the first frequency priority information used for cell reselection becomes invalid, an RRC connection request message is sent to a first network device; a first RRC connection release message sent by the first network device is received, the first RRC connection release message includes first indication information, and the first indication information is used to indicate the second frequency priority information used for cell reselection.

[0138] Optionally, the terminal device is receiving multicast service data or has interesting multicast service data to receive.

[0139] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0140] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0141] Optionally, the processor is also used to perform the following operations: receiving a second RRC connection release message sent by a second network device, the second RRC connection release message including third indication information, the third indication information being used to indicate the first frequency priority information, and a first timer associated with the first frequency priority information; triggering entry into a non-connected state, and starting the first timer.

[0142] The processor is used to send an RRC connection request message to a first network device when first frequency priority information used for cell reselection is invalid, specifically including: when it is determined that the first timer has timed out, sending the RRC connection request message to the first network device.

[0143] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0144] Optionally, the type of the first timer and the type of the second timer are both related to the multicast service; or, the first timer and the second timer are both T320 timers.

[0145] The apparatus 400 may further include a user interface 440. For different terminal devices, the user interface 440 may also be an interface capable of externally or internally connecting required devices. The connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0146] The bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 430 and various circuits of memory represented by memory 410 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 420 may be a plurality of components, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 430 is responsible for managing the bus architecture and general processing, and the memory 410 may store data used by the processor 430 when performing operations.

[0147] Optionally, the processor 430 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0148] The processor 430 is used to execute all method steps of the terminal device in the embodiment of the present application according to the obtained executable instructions by calling the computer program stored in the memory 410. The processor 430 and the memory 410 can also be arranged physically separately.

[0149] It should be noted here that the device 400 provided in the present application can implement all the method steps implemented by the terminal device in the above method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0150] Figure 5 This is a schematic diagram of the structure of another priority information updating device provided in an embodiment of the present application. Figure 5 As shown, the apparatus 500 is applied to a first network device, and the apparatus 500 includes: a memory 510 , a transceiver 520 , and a processor 530 .

[0151] The memory 510 is used to store computer programs; the transceiver 520 is used to send and receive data under the control of the processor 530; the processor 530 is used to read the computer program stored in the memory 510 and perform the following operations:

[0152] A RRC connection request message is sent by a receiving terminal device when first frequency priority information used for cell reselection becomes invalid; a first RRC connection release message is sent to the terminal device, wherein the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information used for cell reselection.

[0153] Optionally, the processor is further configured to perform the following operation: determine that the terminal device is receiving multicast service data or there is interesting multicast service data to be received.

[0154] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0155] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0156] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0157] Optionally, the type of the second timer is related to the multicast service; or, the second timer is a T320 timer.

[0158] Among them, Figure 5 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 530 and various circuits of memory represented by memory 510 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 520 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 530 is responsible for managing the bus architecture and general processing, and the memory 510 may store data used by the processor 530 when performing operations.

[0159] Optionally, the processor 530 may be a CPU, an ASIC, an FPGA or a CPLD, and the processor may also adopt a multi-core architecture.

[0160] It should be noted here that the above-mentioned device 500 provided in the present application can implement all the method steps implemented by the first network device in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be specifically repeated here.

[0161] Figure 6 A structural diagram of another priority information updating device provided in an embodiment of the present application. Figure 6 As shown, the apparatus 600 is applied to a terminal device, and the apparatus 600 includes: a sending unit 610 and a receiving unit 620. Optionally, the apparatus 600 may further include a processing unit 630, for example.

[0162] The sending unit 610 is configured to send an RRC connection request message to the first network device when the first frequency priority information used for cell reselection becomes invalid.

[0163] The receiving unit 620 is used to receive a first RRC connection release message sent by the first network device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

[0164] Optionally, the terminal device is receiving multicast service data or has interesting multicast service data to receive.

[0165] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0166] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0167] Optionally, the receiving unit 620 is further used to receive a second RRC connection release message sent by a second network device, where the second RRC connection release message includes third indication information, where the third indication information is used to indicate the first frequency priority information and a first timer associated with the first frequency priority information;

[0168] The processing unit 630 is used to trigger entering the unconnected state and start the first timer.

[0169] The sending unit 610 is specifically configured to send the RRC connection request message to the first network device when it is determined that the first timer has expired.

[0170] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0171] Optionally, the type of the first timer and the type of the second timer are both related to the multicast service; or, the first timer and the second timer are both T320 timers.

[0172] It should be noted here that the device 600 provided in the present application can implement all the method steps implemented by the terminal device in the above method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0173] Figure 7 A schematic diagram of the structure of another priority information updating device provided in an embodiment of the present application. Figure 7As shown, the apparatus 700 is applied to a first network device, and the apparatus 700 includes: a receiving unit 710 and a sending unit 720. Optionally, the apparatus 700 may further include a processing unit 730, for example.

[0174] The receiving unit 710 is configured to receive an RRC connection request message sent by a terminal device when the first frequency priority information used for cell reselection fails;

[0175] The sending unit 720 is used to send a first RRC connection release message to the terminal device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

[0176] Optionally, the processing unit 730 is configured to determine that the terminal device is receiving multicast service data or there is interested multicast service data to be received.

[0177] Optionally, the RRC connection request message includes: second indication information, and the second indication information is used to instruct the first network device to update the first frequency priority information.

[0178] Optionally, if the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; or, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

[0179] Optionally, the first indication information is also used to indicate a second timer associated with the second frequency priority information.

[0180] Optionally, the type of the second timer is related to the multicast service; or, the second timer is a T320 timer.

[0181] It should be noted here that the above-mentioned device 700 provided in the present application can implement all the method steps implemented by the first network device in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0182] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0183] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0184] An embodiment of the present application further provides a non-transitory readable storage medium, which stores a computer program, and the computer program is used to enable a processor to execute the method steps of the terminal device in the above method embodiment.

[0185] An embodiment of the present application further provides a non-transitory readable storage medium, which stores a computer program, and the computer program is used to enable a processor to execute the method steps of the first network device in the above method embodiment.

[0186] The non-transitory readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0187] An embodiment of the present application also provides a computer program product, including a computer program, which implements the method steps of the terminal device in the above method embodiment when the computer program is executed by a processor.

[0188] An embodiment of the present application also provides a computer program product, including a computer program, which implements the method steps of the first network device in the above method embodiment when the computer program is executed by a processor.

[0189] An embodiment of the present application also provides a communication system, which may include, for example, the aforementioned terminal device, the first network device, and the second network device, for implementing the aforementioned method embodiment.

[0190] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0191] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0192] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0193] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0194] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A priority information updating method, characterized in that: The method is applied to a terminal device, and the method includes: When the first frequency priority information used for cell reselection becomes invalid, sending an RRC connection request message to the first network device; A first RRC connection release message sent by the first network device is received, where the first RRC connection release message includes first indication information, where the first indication information is used to indicate second frequency priority information for cell reselection.

2. The method according to claim 1, characterized in that The terminal device is receiving multicast service data or has interested multicast service data to receive.

3. The method according to claim 1 or 2, characterized in that The RRC connection request message includes: second indication information, where the second indication information is used to instruct the first network device to update the first frequency priority information.

4. The method according to claim 3, characterized in that If the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; Alternatively, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

5. The method according to claim 2, characterized in that The method further comprises: receiving a second RRC connection release message sent by a second network device, where the second RRC connection release message includes third indication information, where the third indication information is used to indicate the first frequency priority information and a first timer associated with the first frequency priority information; Triggering entry into a disconnected state and starting the first timer; The sending an RRC connection request message to the first network device when the first frequency priority information used for cell reselection becomes invalid includes: When it is determined that the first timer has expired, the RRC connection request message is sent to the first network device.

6. The method according to claim 5, characterized in that The first indication information is further used to indicate a second timer associated with the second frequency priority information.

7. The method according to claim 6, characterized in that The type of the first timer and the type of the second timer are both related to the multicast service; Alternatively, both the first timer and the second timer are T320 timers.

8. A priority information updating method, characterized in that: The method is applied to a first network device, and the method includes: receiving an RRC connection request message sent by a terminal device when the first frequency priority information used for cell reselection becomes invalid; A first RRC connection release message is sent to the terminal device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

9. The method according to claim 8, characterized in that The method further comprises: It is determined that the terminal device is receiving multicast service data or has interesting multicast service data to be received.

10. The method according to claim 8 or 9, characterized in that The RRC connection request message includes: second indication information, where the second indication information is used to instruct the first network device to update the first frequency priority information.

11. The method according to claim 9, characterized in that The first indication information is further used to indicate a second timer associated with the second frequency priority information.

12. The method according to claim 11, characterized in that The type of the second timer is related to the multicast service; or the second timer is a T320 timer.

13. A priority information updating device, characterized in that: The device is applied to a terminal device, and includes: a sending unit, configured to send an RRC connection request message to the first network device when the first frequency priority information used for cell reselection becomes invalid; A receiving unit is used to receive a first RRC connection release message sent by the first network device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

14. A priority information updating device, characterized in that: The apparatus is applied to a first network device, and includes: A receiving unit, configured to receive an RRC connection request message sent by a terminal device when the first frequency priority information used for cell reselection becomes invalid; A sending unit is used to send a first RRC connection release message to the terminal device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

15. A priority information updating device, characterized in that: The device is applied to a terminal device, and includes a memory, a transceiver, and a processor; a memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: When the first frequency priority information used for cell reselection becomes invalid, sending an RRC connection request message to the first network device; A first RRC connection release message sent by the first network device is received, where the first RRC connection release message includes first indication information, where the first indication information is used to indicate second frequency priority information for cell reselection.

16. The device according to claim 15, characterized in that The terminal device is receiving multicast service data or has interested multicast service data to receive.

17. The device according to claim 15 or 16, characterized in that The RRC connection request message includes: second indication information, where the second indication information is used to instruct the first network device to update the first frequency priority information.

18. The device according to claim 17, characterized in that If the terminal device is in an idle state, the RRC connection request message is an RRC connection establishment request message; Alternatively, if the terminal device is in an inactive state, the RRC connection request message is an RRC connection recovery request message.

19. The device according to claim 16, characterized in that The processor is further configured to perform the following operations: receiving a second RRC connection release message sent by a second network device, where the second RRC connection release message includes third indication information, where the third indication information is used to indicate the first frequency priority information and a first timer associated with the first frequency priority information; Triggering entry into a disconnected state and starting the first timer; The processor is configured to send an RRC connection request message to the first network device when the first frequency priority information used for cell reselection is invalid, specifically including: When it is determined that the first timer has expired, the RRC connection request message is sent to the first network device.

20. The device according to claim 19, characterized in that The first indication information is further used to indicate a second timer associated with the second frequency priority information.

21. The device according to claim 20, characterized in that The type of the first timer and the type of the second timer are both related to the multicast service; Alternatively, both the first timer and the second timer are T320 timers.

22. A priority information updating device, characterized in that: The device is applied to a first network device, and includes a memory, a transceiver, and a processor; a memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: receiving an RRC connection request message sent by a terminal device when first frequency priority information used for cell reselection becomes invalid; A first RRC connection release message is sent to the terminal device, where the first RRC connection release message includes first indication information, and the first indication information is used to indicate second frequency priority information for cell reselection.

23. A non-transitory readable storage medium, characterized in that The non-transitory readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method according to any one of claims 1 to 7; or to execute the method according to any one of claims 8 to 12.

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