A session switching method, device, chip and module device

Abstract

The present application discloses a session switching method, apparatus, chip and module device. The method includes: a first network access device receives a protocol data unit (PDU) session establishment request message from a terminal device, and the PDU session establishment request message includes: a data network name (DNN) and a first quality of service (QoS) rule; the first network access device determines a second QoS rule based on the PDU session establishment request message, and establishes a second PDU session between the terminal device and the network indicated by the DNN, where the second QoS rule is a rule determined by the first network access device based on the first QoS rule; the first network access device allocates resources for the terminal device based on the second QoS rule. By using the method described in the present application, it is beneficial to keep the QoS consistent before and after the handover of the terminal device, and avoid affecting the data service during the handover process of the terminal device.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular, to a method, apparatus, chip, and module device for session handover. Background Art

[0002] With the development of the times, in order to enjoy better network services indoors, more and more users install access devices at home, and such access devices can be referred to as indoor network access devices. The terminal device can access the data network through the indoor network access device deployed indoors.

[0003] When the user walks from outdoors to indoors, the terminal device will disconnect the connection with the outdoor macro base station and access the indoor network access device. For example, at this time, the user is performing a service with high requirements for Quality of Service (QoS), such as a game. If the QoS is different before and after the handover, it may have a certain impact on the data service. Therefore, how to keep the QoS consistent before and after the handover and avoid affecting the data service during the handover of the terminal device is an urgent problem to be solved. Summary of the Invention

[0004] The present application provides a session handover method, apparatus, chip, and module device, which is beneficial to keeping the QoS of the terminal device consistent before and after the handover and avoiding affecting the data service during the handover of the terminal device.

[0005] In a first aspect, the present application provides a session handover method, and the method includes: a first network access device receives a protocol data unit (PDU) session establishment request message from a terminal device, where the PDU session establishment request message includes: a data network name (DNN) and a first quality of service (QoS) rule, and the first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device, and the first PDU session is a PDU session established between the second network access device and the core network device; the first network access device determines a second QoS rule based on the PDU session establishment request message, and establishes a second PDU session between the terminal device and the network indicated by the DNN, where the second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; the first network access device allocates resources for the terminal device based on the second QoS rule.

[0006] In a possible implementation manner, before the step that the first network access device receives a protocol data unit (PDU) session establishment request message from the terminal device, the first network access device broadcasts a first message, and the first message is used to indicate that the first network access device is not connected to the core network.

[0007] In a possible implementation, the first network access device sends second information to the terminal device, and the second information includes the second QoS rule.

[0008] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0009] In a second aspect, the present application provides a session handover method, and the method includes: The terminal device sends a protocol data unit (PDU) session establishment request information to a first network access device, and the PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule, where the first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device, and the first PDU session is a PDU session established for the second network access device and the core network device; The terminal device receives a PDU session establishment acceptance information from the first network access device, and the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; The terminal device sends data to the network indicated by the DNN through the second PDU session based on a first resource, where the first resource is a resource allocated by the first network access device for the terminal device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

[0010] In a possible implementation, the terminal device receives first information from the first network access device, and the first information is used to indicate that the first network access device is not connected to the core network device.

[0011] In a possible implementation, the terminal device receives second information from the first network access device, and the second information includes the second QoS rule.

[0012] In a possible implementation, before the terminal device receives the PDU session establishment acceptance information from the first network access device, the terminal device keeps the first PDU session from being released; after the terminal device receives the PDU session establishment acceptance information from the first network access device, the method further includes: The terminal device disconnects the first PDU session.

[0013] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0014] In a third aspect, the present application provides a session switching method, which includes: a first network access device receives a non-access stratum (NAS) message sent by a terminal device through an N1 interface, where the NAS message is used to establish a protocol data unit (PDU) session; the first network access device forwards the NAS message to a core network device.

[0015] In a possible implementation manner, before the first network access device receives the NAS message sent by the terminal device through the N1 interface, the first network access device broadcasts third information, where the third information is used to indicate that the first network access device is connected to the core network.

[0016] In a fourth aspect, the present application further provides a communication device. The communication unit is configured to receive protocol data unit (PDU) session establishment request information from a terminal device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by the core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device. The processing unit is configured to determine a second QoS rule based on the PDU session establishment request information, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device. The processing unit is further configured to allocate resources for the terminal device based on the second QoS rule.

[0017] In a fifth aspect, the present application further provides a communication device. The communication device includes a communication unit, where: the communication unit is configured to send protocol data unit (PDU) session establishment request information to a first network access device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by the core network device for a second network access device, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device. The communication unit is further configured to receive PDU session establishment acceptance information from the first network access device, where the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session. The communication unit is further configured to send data to the network indicated by the DNN through the second PDU session based on first resources. The first resources are resources allocated by the first network access device for the terminal device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

[0018] In a sixth aspect, the present application further provides a communication device, which includes a communication unit, wherein: the communication unit is configured to receive a non-access stratum (NAS) message sent by a terminal device through an N1 interface, and the NAS message is used to establish a protocol data unit (PDU) session; the communication unit is further configured to forward the NAS message to a core network device.

[0019] In a seventh aspect, the present application further provides a chip, which is configured to receive protocol data unit (PDU) session establishment request information from a terminal device, and the PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device; the chip is further configured to determine a second QoS rule based on the PDU session establishment request information, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; the chip is further configured to allocate resources for the terminal device based on the second QoS rule.

[0020] In an eighth aspect, the present application further provides a chip, which is configured to send protocol data unit (PDU) session establishment request information to a first network access device, and the PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device; the chip is further configured to receive a PDU session establishment acceptance information from the first network access device, and the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; the chip is further configured to send data to the network indicated by the DNN through the second PDU session based on first resources, where the first resources are resources allocated by the first network access device for the terminal device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

[0021] In a ninth aspect, the present application further provides a chip, which is configured to receive a non-access stratum (NAS) message sent by a terminal device through an N1 interface, and the NAS message is used to establish a protocol data unit (PDU) session; the chip is further configured to forward the NAS message to a core network device.

[0022] In a tenth aspect, the present application further provides a module device, which includes a communication module, a power module, a storage module, and a chip module. Among them: the power module is used to provide electrical energy for the module device; the storage module is used to store data and instructions; the communication module is used to perform internal communication of the module device or to communicate between the module device and an external device; the chip module is used to: receive a protocol data unit (PDU) session establishment request message from a terminal device, the PDU session establishment request message includes a data network name (DNN) and a first quality of service (QoS) rule, and the first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device, and the first PDU session is a PDU session established between the second network access device and the core network device; determine a second QoS rule based on the PDU session establishment request message, and establish a second PDU session between the terminal device and the network indicated by the DNN, and the second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; allocate resources for the terminal device based on the second QoS rule.

[0023] In an eleventh aspect, the present application further provides a module device, which includes a communication module, a power module, a storage module, and a chip module. Among them: the power module is used to provide electrical energy for the module device; the storage module is used to store data and instructions; the communication module is used to perform internal communication of the module device or to communicate between the module device and an external device; the chip module is used to: send a PDU session establishment request message to a first network access device, and the PDU session establishment request message includes one or more of the following information: a DNN and a first QoS rule, and the first QoS rule is a QoS rule determined by the core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device, and the first PDU session is a PDU session established between the second network access device and the core network device; receive a PDU session establishment acceptance message from the first network access device, and the PDU session establishment acceptance message is used to indicate that the first network access device has established a second PDU session; send data to the network indicated by the DNN through the second PDU session based on first resources, and the first resources are resources allocated by the first network access device for the terminal device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request message.

[0024] In a twelfth aspect, the present application further provides a module device, which includes a communication module, a power module, a storage module, and a chip module, where: the power module is used to provide electrical energy for the module device; the storage module is used to store data and instructions; the communication module is used for internal communication of the module device or for communication between the module device and an external device; the chip module is used to: receive a non-access stratum (NAS) message sent by a terminal device through an N1 interface, where the non-access stratum message is used to establish a protocol data unit (PDU) session; and forward the NAS message to a core network device.

[0025] In a thirteenth aspect, the present application further provides a communication device, including a processor, a memory, and a transceiver; the transceiver is used to receive a channel or a signal, or send a channel or a signal; the memory is used to store a computer program; the processor is used to call the computer program from the memory to execute the method that may be implemented as described in the first aspect or the second aspect and any one of their possible implementations.

[0026] In a fourteenth aspect, the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program runs on a communication device, the communication device is caused to execute the method that may be implemented as described in the first aspect or the second aspect and any one of their possible implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of a terminal device switching a network access device;

[0029] Figure 2 It is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0030] Figure 3 It is a schematic flowchart of a session switching method provided by an embodiment of the present application;

[0031] Figure 4 It is a schematic flowchart of another session switching method provided by an embodiment of the present application;

[0032] Figure 5 It is a schematic flowchart of another session switching provided by an embodiment of the present application;

[0033] Figure 6 It is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0034] Figure 7 It is a schematic structural diagram of another communication device provided by an embodiment of the present application;

[0035] Figure 8 It is a schematic structural diagram of a module device provided by an embodiment of the present application. Specific Embodiments

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms "a", "an", "the", "above-mentioned", "the" and "this" are also intended to include the plural forms, unless clearly indicated to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more of the listed items.

[0038] It should be noted that the terms "first", "second", "third", etc. in the specification and claims of the present application and in the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" and any variation thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] First, some terms related to the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

[0040] 1. Terminal device:

[0041] The terminal device refers to various forms of user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device can also be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication function, computer device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in the future 5G network or terminal device in the future evolved Public Land Mobile Network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0042] 2. Network access device:

[0043] The network access device can be a small cell base station, access point (AP), home base station non-public network cell base station. A base station is a device deployed in a Radio Access Network (RAN) to provide wireless communication functions. For example, the device providing base station functions in a 2G network includes a Base Transceiver Station (BTS), the device providing base station functions in a 3G network includes a Node B, the device providing base station functions in a 4G network includes an evolved Node B (eNB), the device providing base station functions in 5G New Radio (NR) includes a gNB, and a next-generation evolved Node B (ng-eNB). Among them, communication between the gNB and the terminal uses NR technology, and communication between the ng-eNB and the terminal uses Evolved Universal Terrestrial Radio Access (E-UTRA) technology. Both the gNB and the ng-eNB can be connected to the 5G core network. The network access device in the embodiments of the present application also includes devices providing access network functions in future new communication systems, etc.

[0044] Network access devices can be divided into two categories. One category is network access devices connected to core network devices, such as macro base stations, etc. Another category is network access devices not connected to core network devices, such as Evolved Residential Gateway (eRG) and Premises Radio Access Station (PRAS), etc.

[0045] Nowadays, more and more users install indoor network access devices at home. Terminal devices can enjoy better network services at home through this indoor network access device. According to the current research progress of the 3rd Generation Partnership Project (3GPP) on indoor network enhancement, there can be indoor network access devices that do not connect to core network devices but directly connect to data networks, such as PRAS and eRG.

[0046] And when the terminal device switches from an outdoor network access device to an indoor network access device, as Figure 1 shown, there is no network interface between the indoor network access device and the outdoor network access device. If the terminal device is transmitting data services with high Quality of Service (QoS) requirements and a switch occurs, if the QoS service quality cannot be maintained consistently, it will affect the data services of the terminal device.

[0047] In addition, in the discussion of fixed-mobile convergence, multiple architectures have been determined. One type of architecture is that the indoor network access device is connected to the core network device, but at this time, there is no N1 interface between the actual terminal device and the core network device. Therefore, the core network device cannot obtain non-access stratum (NAS) messages sent by the terminal device as the main body and cannot truly confirm the service requirements of the terminal device. Another type of architecture is that the indoor network access device is not connected to the operator's core network but directly connected to the data network through a fixed network. For these two types of architectures, the core network of the mobile operator cannot identify the real user terminal. Therefore, during the switching process of the terminal device, it may also have a certain impact on the services of the terminal device.

[0048] In order to keep QoS consistent before and after switching and avoid affecting the data services of the terminal device, the embodiments of this application provide a method and a communication device for session switching. To better understand the embodiments of this application, the network architecture of the embodiments of this application will be described first:

[0049] The embodiments of this application can be applied to the network architecture schematic diagram as Figure 2 shown, Figure 2The network architecture shown is the network architecture of a wireless communication system, which generally includes a terminal device and a first network access device. The number and form of each device do not limit the embodiments of the present application. The terminal device is connected to the first network access device, and the terminal device can obtain data network services through the first network access device. Among them, the first network access device can provide communication services for multiple terminal devices. In the embodiments of the present application, the unidirectional communication link from the first network access device to the terminal device is defined as the downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; while the unidirectional communication link from the terminal device to the first network access device is the uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0050] The method provided by the embodiments of the present application can be applied to various communication systems. For example, it can be an Internet of Things (IoT) system, a Narrow Band Internet of Things (NB-IoT) system, a Long Term Evolution (LTE) system, or a 5th-generation (5G) communication system. It can also be an LTE and 5G hybrid architecture, a 5G New Radio (NR) system, and new communication systems emerging in the future development of communications.

[0051] The session switching method provided by the embodiments of the present application will be further described in detail below:

[0052] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of a session switching method provided by the embodiments of the present application. As Figure 3 shown, the session switching method includes the following steps 301 to 305. Figure 3 The subject of execution of the method shown can be the terminal device and the first network access device, or the subject can be the chip in the terminal device and the first network access device chip. Figure 3 Taking the terminal device and the first network access device as the execution subject of the method as an example for illustration. The subject of execution of the session switching method shown in other drawings of the embodiments of the present application is the same by analogy, and will not be elaborated later. Among them:

[0053] 301. The terminal device sends a PDU session establishment request message to the first network access device.

[0054] In the embodiments of the present application, after the terminal device accesses the first network access device, the terminal device will send a Protocol Data Unit (PDU) session establishment request message to the first network access device. The PDU session establishment request message is used to instruct the first network access device to establish a PDU session. Among them, the first network access device is usually an indoor network access device, which is not connected to the core network device and can be directly connected to the data network.

[0055] In a possible implementation manner, the PDU session establishment request message may include one or more of the following information: the type of the first PDU session, the Data Network Name (DNN), Session and Service Continuity (SSC), Quality of Service (QoS) request, and the first QoS rule. In addition, the PDU session establishment request message may further include other information, which is not limited in the embodiments of the present application.

[0056] Among them, the DNN is used to indicate the name of the data network corresponding to the PDU session that the terminal device hopes to establish. The SSC is used to indicate the SSC mode of the PDU session that the terminal device hopes to establish. The QoS request is used to instruct the first network access device to generate a second QoS rule. The first PDU session is a PDU session established by the second network access device and the core network device. The second network access device is the network access device that the terminal device connected to before accessing the first network access device. The second network access device is usually an outdoor network access device, such as a macro base station, etc. The second network access device may also be an indoor network access device, such as a small base station in a shopping mall, etc., which is not limited in the embodiments of the present application. The second network access device is connected to the core network device. The first QoS rule is the QoS rule determined by the core network device for the second network access device, and is used to meet the data service requirements of the terminal device. The terminal device sends the PDU session establishment request message to the first network access device, requesting the first network access device to provide the same network service as the second network access device. Based on this method, it is beneficial to keep the corresponding QoS consistent before and after the terminal device switches, and it is not easy to affect the data service of the terminal device.

[0057] 302. The first network access device determines a second QoS rule based on the PDU session establishment request message, and establishes a second PDU session between the terminal device and the network indicated by the DNN.

[0058] In a possible implementation, the first network access device generates a second QoS rule based on the PDU session establishment request information. The second QoS rule may be the same as the first QoS rule, or the first network access device may also appropriately adjust the first QoS rule based on its own load condition and the PDU session establishment request information to generate the second QoS rule. For example, when the load is light, more resources can be allocated to the terminal device to improve the user experience. Based on this method, it is beneficial to ensure that the QoS corresponding to the terminal device remains consistent before and after handover and is less likely to affect the data service of the terminal device.

[0059] 303. The first network access device sends PDU session establishment acceptance information.

[0060] In the embodiment of the present application, after establishing the second PDU session between the terminal device and the network indicated by the DNN, the first network access device will send PDU session establishment acceptance (PDU Session Establishment Accept) information to the terminal device. The PDU session establishment acceptance information is used to indicate that the first network access device has established the second PDU session. Based on this method, it is beneficial for the terminal device to determine as early as possible that the PDU session establishment is completed and to transmit data services in a timely manner.

[0061] 304. The first network access device allocates resources for the terminal device based on the second QoS rule.

[0062] In the embodiment of the present application, the second QoS rule is used for the first network access device to allocate resources for the terminal device to meet the data service requirements of the terminal device. After the first network access device determines the second QoS rule, the first network access device allocates resources for the terminal device based on the second QoS rule. Since the second QoS rule is determined by the first network access device based on the first QoS rule, the resources allocated by the first network access device for the terminal device based on the second QoS rule are beneficial to avoiding the impact on data services during the handover process of the terminal device.

[0063] In a possible implementation, after determining the resources allocated for the terminal device, the first network access device may send resource indication information to the terminal device. The indication information is used to indicate a first resource, and the first resource is used for the terminal device to transmit data services.

[0064] Among them, the embodiment of the present application does not limit the execution order of step 303 and step 304. Step 303 and step 304 may be executed simultaneously, or step 304 may be indicated first and then step 303 may be executed.

[0065] 305. The terminal device sends data to the network indicated by the DNN based on the first resource through the second PDU session.

[0066] In the embodiments of the present application, after determining the first resource, the terminal device sends data to the network indicated by the DNN based on the first resource through the second PDU session. The first resource is the resource allocated by the first network access device for the terminal device based on the second QoS rule, and the second QoS rule is the QoS rule determined by the first network access device according to the PDU session establishment request information. Since the second QoS rule is determined by the first network access device based on the first QoS rule, the first resource allocated by the first network access device based on the second QoS rule can meet the data service requirements of the terminal device, which is beneficial to avoiding certain impacts on the data service during the handover process of the terminal device.

[0067] Please refer to Figure 4 , Figure 4 which is a schematic flowchart of a session handover method provided by the embodiments of the present application. As Figure 4 shown, the session handover method includes the following steps 401 to step 408. Among them, the implementation manners of steps 402 to 404 are the same as those of steps 301 to 303, and the implementation manners of steps 407 and 408 are the same as those of steps 304 and 305. The embodiments of the present application will not elaborate here.

[0068] 401. The first network access device broadcasts the first information.

[0069] In the embodiments of the present application, the first information is used to indicate that the first network access device is not connected to the core network. The first information may be a special public land mobile network code or other network codes.

[0070] In a possible implementation manner, before the terminal device accesses the first network access device, it will receive the first information broadcast by the first network access device. After receiving the first information, the terminal device will access the indoor network access device based on local authentication. Based on this method, the terminal device can determine that the first network access device is not connected to the core network device through the first information, and can adopt a corresponding access method to access the first network access device.

[0071] 402. The terminal device sends a protocol data unit (PDU) session establishment request information.

[0072] 403. The first network access device determines the second QoS rule based on the PDU session establishment request information, and establishes a second PDU session between the terminal device and the network indicated by the DNN.

[0073] 404. The first network access device sends a PDU session establishment acceptance message.

[0074] 405. The first network access device sends a second message.

[0075] In the embodiments of the present application, the first network access device sends the second message to the terminal device, and the second message includes the second QoS rule. If the terminal device needs to access other network access devices after disconnecting from the first network access device, the second QoS rule can be sent to the other network access device. Based on this method, the other network access device can generate a corresponding QoS rule according to the second QoS rule, which can avoid the impact on data services during the handover process of the terminal device.

[0076] Among them, step 405 only needs to be executed after step 403. For example, step 405 can also be executed before step 404 or after step 406, etc. The embodiments of the present application do not limit this.

[0077] 406. The terminal device disconnects the first PDU session.

[0078] In the embodiments of the present application, before the terminal device receives the PDU session establishment acceptance message from the first network access device, the terminal device keeps the first PDU session without release; after the terminal device receives the PDU session establishment acceptance message from the first network access device, the terminal device disconnects the first PDU session. Based on this method, it is beneficial to avoid the impact on data services during the handover process of the terminal device.

[0079] 407. The first network access device allocates resources for the terminal device based on the second QoS rule.

[0080] 408. The terminal device sends data to the network indicated by the DNN through the second PDU session based on the first resource.

[0081] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of a session handover method provided by the embodiments of the present application. As Figure 5 shown, the session handover method includes steps 501 to 502.

[0082] 501. The terminal device sends a non-access stratum (NAS) message to the first network access device through the N1 interface.

[0083] In the embodiments of the present application, the terminal device sends a non-access stratum (NAS) message to the first network access device through the N1 interface, and the NAS message is used to establish a protocol data unit (PDU) session.

[0084] In a possible implementation, before the terminal device accesses the first network access device, the terminal device receives third information broadcast by the first network access device, where the third information is used to indicate that the first network access device is connected to the core network. After receiving the first information, the terminal device determines that the first network access device is connected to the core network. After the terminal device accesses the first network access device, it will request the core network device to perform authentication through the first network access device to access the core network device.

[0085] Optionally, the third information may be a special public land mobile network code or other network code.

[0086] In a possible implementation, before the terminal device accesses the first network access device, the first terminal device is connected to a second network access device. The second network access device and the core network device establish a first PDU session for the terminal device, and the first QoS rule determined by the core network device for the second network access device is used for the second network access device to allocate resources for the terminal device based on the first QoS rule to meet the data service requirements of the terminal device. Among them, the NAS message sent by the terminal device carrying the first QoS rule can enable the second QoS rule generated by the core network device based on the first QoS rule to meet the user's data service requirements and avoid affecting the data service of the terminal device during the handover process.

[0087] 502. The first network access device forwards the NAS message to the core network device.

[0088] In a possible implementation, the first network access device forwards the NAS message to the core network device in a transparent transmission manner. The transparent transmission method only responsible for transmitting the data to be transmitted to the destination node while ensuring the transmission quality without processing the transmitted data. Based on this method, since the NAS message received by the core network device is sent by the terminal device, the core network device can more clearly understand the service requirements of the terminal device, establish a PDU session for the terminal device, and generate a more appropriate QoS rule to avoid affecting the data service of the terminal device during the handover process.

[0089] Please refer to Figure 6 , Figure 6 which shows a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 6 The shown communication device can be used to perform some or all of the functions of the above-mentioned first network access device. The device can be the first network access device, or a device in the first network access device, or a device that can be used in matching with the first network access device. Among them, the communication device can also be a chip system. Figure 6The communication device shown may include a communication unit 601 and a processing unit 602. Among them, the processing unit 602 is used for data processing. The communication unit 601 is used for communicating with other devices. The communication unit 601 integrates a receiving unit and a transmitting unit. The communication unit 601 may also be referred to as a transceiver unit. Alternatively, the communication unit 601 may be split into a receiving unit and a transmitting unit. The same applies to the processing unit 602 and the communication unit 601 hereinafter, and will not be elaborated hereinafter. Among them:

[0090] The communication unit 601 is configured to receive protocol data unit (PDU) session establishment request information from a terminal device. The PDU session establishment request information includes: a data network name (DNN) first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a first PDU session for a second network access device, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established for the second network access device and the core network device; the processing unit 602 is configured to determine a second QoS rule based on the PDU session establishment request information, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; the processing unit 602 is further configured to allocate resources for the terminal device based on the second QoS rule.

[0091] In a possible implementation manner, before the communication unit 601 is configured to receive protocol data unit (PDU) session establishment request information from a terminal device, the communication unit 601 is further configured to broadcast first information, and the first information is used to indicate that the first network access device is not connected to the core network.

[0092] In a possible implementation manner, the communication unit 601 is configured to send second information to the terminal device, and the second information includes the second QoS rule.

[0093] In a possible implementation manner, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0094] Please refer to Figure 6 , Figure 6 which shows a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 6 The communication device shown can be used to execute part or all of the functions of the terminal device in any of the method embodiments described above. The device may be a terminal device, or a device in the terminal device, or a device that can be used in matching with the terminal device. Figure 6The communication device shown may include a communication unit 601 and a processing unit 602. Among them:

[0095] The communication unit 601 is configured to send a PDU session establishment request message to a first network access device. The PDU session establishment request message includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device; The communication unit 601 is further configured to receive a PDU session establishment acceptance message from the first network access device. The PDU session establishment acceptance message is used to indicate that the first network access device has established a second PDU session; The communication unit 601 is further configured to send data to the network indicated by the DNN through the second PDU session based on a first resource. The first resource is a resource allocated by the first network access device for the terminal device based on a second QoS rule. The second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request message.

[0096] In a possible implementation, the communication unit 601 is further configured to receive a first message from the first network access device. The first message is used to indicate that the first network access device is not connected to the core network device.

[0097] In a possible implementation, the communication unit 601 is further configured to obtain a second message from the first network access device. The second message includes the second QoS rule.

[0098] In a possible implementation, before the communication unit 601 is configured to receive the PDU session establishment acceptance message from the first network access device, the processing unit 602 is configured to keep the first PDU session from being released; after the communication unit 601 is configured to receive the PDU session establishment acceptance message from the first network access device, the processing unit 602 is further configured to disconnect the first PDU session.

[0099] In a possible implementation, the PDU session establishment request message further includes one or more of the type of the first PDU session, session and service continuity (SSC), and QoS request.

[0100] Please refer to Figure 6 , Figure 6 which shows a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 6The communication device shown can be used to perform some or all of the functions of the first network access device in any of the method embodiments described above. The device can be the first network access device, or a device in the first network access device, or a device that can be used in conjunction with the first network access device. Figure 6 The communication device shown may include a communication unit 601 and a processing unit 602. Among them:

[0101] The communication unit 601 is configured to receive a non-access stratum (NAS) message sent by a terminal device through the N1 interface. The NAS message is used to establish a protocol data unit (PDU) session. The communication unit 601 is further configured to forward the NAS message to a core network device.

[0102] In a possible implementation, the communication unit 601 is further configured to broadcast third information, which is used to indicate that the first network access device is connected to the core network.

[0103] An embodiment of this application also provides a chip, which can execute the relevant steps of the first network access device in the foregoing method embodiments.

[0104] The chip is configured to receive a PDU session establishment request message from a terminal device. The PDU session establishment request message includes: a data network name (DNN) and a first QoS rule. The first QoS rule is a QoS rule determined by the core network device for a first PDU session for a second network access device, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device. The chip is further configured to determine a second QoS rule based on the PDU session establishment request message, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device. The chip is further configured to allocate resources for the terminal device based on the second QoS rule.

[0105] In a possible implementation, before the chip is configured to receive a PDU session establishment request message from a terminal device, the chip is further configured to broadcast first information, which is used to indicate that the first network access device is not connected to the core network.

[0106] In a possible implementation, the chip is configured to send second information to the terminal device, and the second information includes the second QoS rule.

[0107] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0108] An embodiment of this application further provides a chip, which can execute the relevant steps of the terminal device in the foregoing method embodiment.

[0109] The chip is used to send PDU session establishment request information to a first network access device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is the QoS rule determined by the core network device for a second network access device for the first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device. The chip is further used to receive PDU session establishment acceptance information from the first network access device, where the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session. The chip is further used to send data to the network indicated by the DNN through the second PDU session based on a first resource, where the first resource is a resource allocated by the first network access device for the terminal device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

[0110] In a possible implementation, the chip is further used to receive first information from the first network access device, where the first information is used to indicate that the first network access device is not connected to the core network device.

[0111] In a possible implementation, the chip is further used to obtain second information from the first network access device, where the second information includes the second QoS rule.

[0112] In a possible implementation, before the chip is used to receive PDU session establishment acceptance information from the first network access device, the chip is used to keep the first PDU session from being released; after the chip is used to receive PDU session establishment acceptance information from the first network access device, the chip is further used to disconnect the first PDU session.

[0113] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0114] An embodiment of this application further provides a chip, which can execute the relevant steps of the first network access device in the foregoing method embodiment.

[0115] The chip is used to receive non-access stratum (NAS) messages sent by a terminal device through an N1 interface, where the NAS messages are used to establish a protocol data unit (PDU) session. The chip is further used to forward the NAS messages to a core network device.

[0116] In a possible implementation, the chip is further used to broadcast third information, where the third information is used to indicate that the first network access device has been connected to the core network.

[0117] As Figure 7 shown in FIG. 70 is a communication device provided in an embodiment of the present application, which is used to implement the functions of the above terminal device. The device may be a terminal device or a device for a terminal device. The device for a terminal device may be a chip system or a chip in the terminal device. Among them, the chip system may be composed of chips, or may include chips and other discrete devices.

[0118] Among them, the communication device may also be used to implement the functions of the above first network access device. The device may be a first network access device or a device for a first network access device. The device for a first network access device may be a chip system or a chip in the first network access device. Among them, the chip system may be composed of chips, or may include chips and other discrete devices.

[0119] The communication device 70 includes at least one processor 720, which is used to implement the data processing functions of the terminal device in the method provided in the embodiment of the present application. The device 70 may further include a communication interface 710, which is used to implement the transceiver operations of the terminal device in the method provided in the embodiment of the present application. In the embodiment of the present application, the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces, and is used to communicate with other devices through a transmission medium. For example, the communication interface 710 is used for the device in the device 70 to communicate with other devices. The processor 720 uses the communication interface 710 to send and receive data, and is used to implement the method embodiments Figure 2 described above.

[0120] The device 70 may further include at least one memory 730, which is used to store program instructions and / or data. The memory 730 is coupled to the processor 720. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units, or modules, and may be electrical, mechanical, or other forms, and is used for information interaction between devices, units, or modules. The processor 720 may cooperate with the memory 730. The processor 720 may execute the program instructions stored in the memory 730. At least one of the at least one memories may be included in the processor.

[0121] After the device 70 is powered on, the processor 720 can read the software program in the memory 730, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be wirelessly transmitted, after the processor 720 performs baseband processing on the data to be transmitted, it outputs a baseband signal to a radio frequency circuit (not shown in the figure). The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the device 70, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 720. The processor 720 converts the baseband signal into data and processes the data.

[0122] In another implementation, the radio frequency circuit and the antenna can be provided independently of the processor 720 that performs baseband processing. For example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged in a remote manner independent of the communication device.

[0123] In the embodiments of the present application, the specific connection medium between the communication interface 710, the processor 720, and the memory 730 is not limited. In the embodiments of the present application Figure 7 it is shown that the memory 730, the processor 720, and the communication interface 710 are connected through a bus 740. The bus is represented by a thick line in Figure 7 The connection manners between other components are only for illustrative purposes and are not to be construed as limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 7 only one thick line is used to represent it in

[0124] When the device 70 is specifically used for a terminal device, for example, when the device 70 is specifically a chip or a chip system, the baseband signal can be output or received by the communication interface 710. When the device 70 is specifically a terminal device, the radio frequency signal can be output or received by the communication interface 710. In the embodiments of the present application, the processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, operations, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The operations of the methods disclosed in combination with the embodiments of the present application can be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0125] It should be noted that the communication device can execute the relevant steps of the terminal device or the access network device in the foregoing method embodiments. For the specific implementation manners provided in each of the above steps, reference can be made thereto, and details are not described herein again.

[0126] For each device and product applied to or integrated into a communication device, each module included therein can be implemented in the form of hardware such as circuits. Different modules can be located in the same component within the terminal (e.g., a chip, a circuit module, etc.) or in different components, or at least some modules can be implemented in the form of a software program that runs on a processor integrated within the terminal, and the remaining (if any) part of the modules can be implemented in the form of hardware such as circuits.

[0127] As Figure 8 shown, Figure 8 FIG. is a schematic structural diagram of a module device provided by an embodiment of the present application. The module device 80 can perform the relevant steps of the first network access device in the foregoing method embodiment. The module device 80 includes: a communication module 801, a power module 802, a storage module 803, and a chip module 804.

[0128] Among them, the power module 802 is used to supply electrical energy to the module device; the storage module 803 is used to store data and instructions; the communication module 801 is used for internal communication of the module device or for communication between the module device and an external device.

[0129] The chip module 804 is used to: receive a protocol data unit (PDU) session establishment request message from a terminal device, where the PDU session establishment request message includes a data network name (DNN) and a first QoS rule. The first quality of service (QoS) rule is a QoS rule determined by a core network device for a first PDU session for a second network access device, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established for the second network access device and the core network device; determine a second QoS rule based on the PDU session establishment request message, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; allocate resources for the terminal device based on the second QoS rule.

[0130] In a possible implementation manner, before the chip module 804 is used to receive a protocol data unit (PDU) session establishment request message from a terminal device, the chip module 804 is further used to broadcast a first message, and the first message is used to indicate that the first network access device is not connected to the core network.

[0131] In a possible implementation manner, the chip module 804 is used to send a second message to the terminal device, and the second message includes the second QoS rule.

[0132] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0133] As Figure 8 shown, Figure 8 FIG. 7 is a schematic structural diagram of a module device provided by an embodiment of the present application. The module device 80 may perform the relevant steps of the terminal device in the foregoing method embodiment. The module device 80 includes: a communication module 801, a power module 802, a storage module 803, and a chip module 804.

[0134] Among them, the power module 802 is used to supply electrical energy to the module device; the storage module 803 is used to store data and instructions; the communication module 801 is used for internal communication of the module device or for communication between the module device and an external device.

[0135] The chip module 804 is used to: send protocol data unit (PDU) session establishment request information to a first network access device. The PDU session establishment request information includes one or more of the following information: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is the QoS rule determined by the core network device for the first PDU session for a second network access device, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device; receive a PDU session establishment acceptance information from the first network access device. The PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; based on a first resource, send data to the network indicated by the DNN through the second PDU session. The first resource is the resource allocated by the first network access device for the terminal device based on a second QoS rule. The second QoS rule is the QoS rule determined by the first network access device according to the PDU session establishment request information.

[0136] In a possible implementation, the chip module 804 is further used to receive first information from the first network access device. The first information is used to indicate that the first network access device is not connected to the core network device.

[0137] In a possible implementation, the chip module 804 is further used to receive second information from the first network access device. The second information includes the second QoS rule.

[0138] In a possible implementation, before the chip module 804 is used to receive the PDU session establishment acceptance information from the first network access device, the chip module 804 is used to keep the first PDU session from being released; after the chip module 804 is used to receive the PDU session establishment acceptance information from the first network access device, the chip module 804 is further used to disconnect the first PDU session.

[0139] In a possible implementation, the PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

[0140] As Figure 8 shown, Figure 8 FIG. is a schematic structural diagram of a module device provided by an embodiment of the present application. The module device 80 may perform the relevant steps of the first network access device in the foregoing method embodiment. The module device 80 includes: a communication module 801, a power module 802, a storage module 803, and a chip module 804.

[0141] Among them, the power module 802 is used to supply electrical energy to the module device; the storage module 803 is used to store data and instructions; the communication module 801 is used for internal communication of the module device or for communication between the module device and external devices.

[0142] The chip module 804 is used to receive non-access stratum (NAS) messages sent by the terminal device through the N1 interface. The non-access stratum messages are used to establish protocol data unit (PDU) sessions; the chip module 804 is further used to forward the NAS messages to the core network device.

[0143] In a possible implementation, the chip module 804 is further used to broadcast third information, and the third information is used to indicate that the first network access device has been connected to the core network.

[0144] An embodiment of the present application further provides a computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and when they run on a processor, the method flow of the foregoing method embodiment is realized.

[0145] An embodiment of the present application further provides a computer program product. When the computer program product runs on a processor, the method flow of the foregoing method embodiment is realized.

[0146] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, certain operations can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0147] The descriptions of the embodiments provided in this application can be referred to each other. The descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, regarding the functions and operations performed by the various devices and equipment provided in the embodiments of this application, reference can be made to the relevant descriptions of the method embodiments of this application. The method embodiments can also refer to, combine with, or cite each other, and the device embodiments can also do the same.

[0148] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A session switching method, characterized in that, The method includes: A first network access device receives protocol data unit (PDU) session establishment request information from a terminal device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established for the second network access device and the core network device, and the first network access device is not connected to the core network device; The first network access device determines a second QoS rule based on the PDU session establishment request information, and establishes a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined by the first network access device based on the first QoS rule, and is used for the first network access device to allocate resources for the terminal device; The first network access device allocates resources for the terminal device based on the second QoS rule.

2. The method according to claim 1, characterized in that, Before the first network access device receives the protocol data unit (PDU) session establishment request information from the terminal device, the method further includes: The first network access device broadcasts first information, and the first information is used to indicate that the first network access device is not connected to the core network.

3. The method according to claim 1 or 2, characterized in that, The method further includes: The first network access device sends second information to the terminal device, and the second information includes the second QoS rule.

4. The method according to claim 1 or 2, characterized in that, The PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

5. A session switching method, characterized in that, The method includes: A terminal device sends protocol data unit (PDU) session establishment request information to a first network access device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established for the second network access device and the core network device, and the first network access device is not connected to the core network device; The terminal device receives PDU session establishment acceptance information from the first network access device, and the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; The terminal device sends data to the network indicated by the DNN through the second PDU session based on first resources. The first resources are resources allocated for the terminal device by the first network access device based on the second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

6. The method according to claim 5, characterized in that, The method further includes: The terminal device receives first information from the first network access device, where the first information is used to indicate that the first network access device is not connected to the core network device.

7. The method according to claim 5 or 6, characterized in that, The method further includes: The terminal device receives second information from the first network access device, where the second information includes the second QoS rule.

8. The method according to claim 5 or 6, characterized in that, Before the terminal device receives the PDU session establishment acceptance information from the first network access device, the terminal device keeps the first PDU session from being released; After the terminal device receives the PDU session establishment acceptance information from the first network access device, the method further includes: The terminal device disconnects the first PDU session.

9. The method according to claim 5, characterized in that, The PDU session establishment request information further includes one or more of the type of the first PDU session, session and service continuity (SSC), and quality of service (QoS) request.

10. A communication device, characterized in that, The communication device includes a communication unit and a processing unit, where: The communication unit is configured to receive protocol data unit (PDU) session establishment request information from a terminal device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by the core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device, and the communication device is not connected to the core network device; The processing unit is configured to determine a second QoS rule based on the PDU session establishment request information, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined based on the first QoS rule and is used to allocate resources for the terminal device; The processing unit is further configured to allocate resources for the terminal device based on the second QoS rule.

11. A communication device, characterized in that, The communication device includes a communication unit, where: The communication unit is configured to send protocol data unit (PDU) session establishment request information to a first network access device. The PDU session establishment request information includes: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by the core network device for a second network access device for a first PDU session, and is used to meet the data service requirements. The first PDU session is a PDU session established between the second network access device and the core network device, and the first network access device is not connected to the core network device; The communication unit is further configured to receive PDU session establishment acceptance information from the first network access device, where the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; The communication unit is further configured to send data to the network indicated by the DNN based on a first resource via the second PDU session, where the first resource is a resource allocated by the first network access device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

12. A session switching chip, characterized in that,The chip includes a processor configured to cause the chip to: Receive protocol data unit (PDU) session establishment request information from a terminal device, where the PDU session establishment request information includes: a data network name (DNN) and a first QoS rule, and the first QoS rule is a QoS rule determined by a core network device for a first PDU session for a second network access device to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device, and the communication device to which the chip is applied is not connected to the core network device; Determine a second QoS rule based on the PDU session establishment request information and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined based on the first QoS rule and is used to allocate resources for the terminal device; Allocate resources for the terminal device based on the second QoS rule.

13. A session switching chip, characterized in that, The chip includes a processor configured to cause the chip to: Send PDU session establishment request information to a first network access device, where the PDU session establishment request information includes: a DNN and a first quality of service (QoS) rule, and the first QoS rule is a QoS rule determined by a core network device for a first PDU session for a second network access device to meet the requirements for data services. The first PDU session is a PDU session established between the second network access device and the core network device, and the first network access device is not connected to the core network device; Receive PDU session establishment acceptance information from the first network access device, where the PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session; Send data to the network indicated by the DNN based on a first resource via the second PDU session, where the first resource is a resource allocated by the first network access device based on a second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

14. A session switching module device, characterized in that, The module device includes a communication module, a power module, a storage module, and a chip module, where: The power module is configured to supply electrical energy to the module device; The storage module is configured to store data and instructions; The communication module is configured to perform internal communication of the module device or communicate between the module device and an external device; The chip module is configured to: Receive protocol data unit (PDU) session establishment request information from a terminal device. The PDU session establishment request information includes a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements of the terminal device. The first PDU session is a PDU session established between the second network access device and the core network device, and the module device is not connected to the core network device. Determine a second QoS rule based on the PDU session establishment request information, and establish a second PDU session between the terminal device and the network indicated by the DNN. The second QoS rule is a rule determined based on the first QoS rule and is used to allocate resources for the terminal device. Allocate resources for the terminal device based on the second QoS rule.

15. A session switching module device, characterized in that, The module device includes a communication module, a power supply module, a storage module, and a chip module, where: The power supply module is used to provide electrical energy for the module device. The storage module is used to store data and instructions. The communication module is used for internal communication within the module device or for communication between the module device and an external device. The chip module is used to: Send PDU session establishment request information to a first network access device. The PDU session establishment request information includes one or more of the following information: a data network name (DNN) and a first quality of service (QoS) rule. The first QoS rule is a QoS rule determined by a core network device for a second network access device for a first PDU session, and is used to meet the data service requirements. The first PDU session is a PDU session established between the second network access device and the core network device, and the first network access device is not connected to the core network device. Receive PDU session establishment acceptance information from the first network access device. The PDU session establishment acceptance information is used to indicate that the first network access device has established a second PDU session. Send data to the network indicated by the DNN through the second PDU session based on first resources. The first resources are resources allocated by the first network access device based on the second QoS rule, and the second QoS rule is a QoS rule determined by the first network access device according to the PDU session establishment request information.

16. A communication device, characterized in that, Includes a processor, a memory, and a transceiver. The transceiver is used to receive a channel or a signal, or to send a channel or a signal. The memory is used to store a computer program. The processor is used to call the computer program from the memory to execute the method according to any one of claims 1 to 9.

17. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium. When the computer program runs on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 9.

Images