WO2020108350A1

WO2020108350A1 - Session management device and system

Info

Publication number: WO2020108350A1
Application number: PCT/CN2019/119474
Authority: WO
Inventors: 丁明; 段小嫣; 余迪虎
Original assignee: 华为技术有限公司
Priority date: 2018-11-26
Filing date: 2019-11-19
Publication date: 2020-06-04
Also published as: CN111225452B; CN111225452A

Abstract

Disclosed in the embodiments of the present invention are a session management device and system. The session management device comprises: a processor, a memory, a transceiver, and a bus. The processor invokes a program code in the memory to execute the following operations: sending a session establishment request message to a network device by means of the transceiver; receiving, by means of the transceiver, a session establishment response message sent by the network device, wherein the session establishment response message carries quality of service QoS information of the session; if the QoS information exceeds the QoS capability supported by a terminal device, reserving part of the QoS information according to the QoS capability supported by the terminal device; and sending a session modification request message to the network device by means of the transceiver, wherein the session modification request message comprises first indication information, and said information is used for indicating unreserved QoS information. The implementation of the embodiments of the present application can solve the abnormality that the QoS information issued by the network device exceeds the capability supported by the terminal device during the session establishment process.

Description

Session management equipment and system

Technical field

The invention relates to the technical field of wireless communication, in particular to a session management device and system.

Background technique

In the session establishment phase, for the newly added quality of service (Qos) flow (Flow), Qos rule (Rule) and/or Qos rule packet filter carried in the PDU SESSIONESTABLISHMENT ACCEPT message delivered by the network The number of (packet) filters is greater than the maximum number supported by the terminal device. The 5th generation (5G) protocol does not define how the terminal device should handle such anomalies.

Therefore, how to solve the above-mentioned anomalies is still a problem to be solved.

Summary of the invention

The embodiments of the present invention provide a session management device and system, which can solve the abnormality that the QoS information delivered by the network device during the session establishment process exceeds the support capability of the terminal device.

The embodiments of the present invention can be specifically implemented by the following technical solutions:

In a first aspect, an embodiment of the present invention provides a terminal device, the terminal device includes: a processor, a memory, a transceiver, and a bus; the processor, the memory, and the transceiver can be connected to each other through a bus, and the transceiver is used to communicate with other communication devices Communication; the memory is used to store program code and data; the processor calls the program code in the memory to perform the following operations:

The session establishment request message is sent to the network device through the transceiver, and the session establishment request message is used to request the establishment of the session; the session establishment response message sent by the network device is received through the transceiver, and the session establishment response message carries the QoS information of the session; When the QoS information exceeds the QoS capability supported by the terminal device, part of the QoS information in the QoS information of the above session is retained according to the QoS capability supported by the terminal device; a session modification request message is sent to the network device through the transceiver, and the session modification request message includes the first indication Information, the first indication information is used to instruct the processor to retain some QoS information in the QoS information of the session.

In a possible design, part of the QoS information in the QoS information of the above-mentioned session is retained, including one or a combination of the following: the default Qos rule in the QoS information of the above-mentioned session and the Qos flow corresponding to the default Qos rule are reserved; The Qos flow with guaranteed bit rate, the Qos rule with guaranteed bit rate and/or the packet filter included with the Qos rule with guaranteed bit rate in the QoS information of the session; the Qos flow with a higher priority in the QoS information of the above session is preferentially retained, The packet filter included in the Qos rule with high priority and/or the Qos rule with high priority.

In a possible design, the session modification request message further includes second indication information, and the second indication information is used to indicate that the terminal device has insufficient Qos capability.

In a possible design, the second indication information is #26 insufficient resources (insufficient resources).

In a possible design, the above-mentioned QoS capabilities supported by the terminal device include one or a combination of: the maximum number of QoS flows supported by the terminal device; the maximum number of QoS rules supported by the terminal device; the packets in the QoS rules supported by the terminal device The maximum number of filters.

In a possible design, it is characterized in that the QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, each of the one or more QoS rules contains One or more packet filters.

In a possible design, the network device is a session management function (SMF) device, and sending the session establishment request message to the network device through the transceiver includes the following: access to the access and mobility management function through the transceiver andmobility management function (AMF) The device sends a session establishment request message, and the session establishment request message is sent by the AMF to the SMF.

In a possible design, the network device is SMF, and receiving the session establishment response message sent by the network device through the transceiver includes: receiving the session establishment response message sent by the AMF through the transceiver. The session establishment response message is received by the AMF from the SMF of.

In a possible design, the network device is SMF, and sending the session modification request message to the network device through the transceiver includes: sending the session modification request message to the AMF through the transceiver, and the session modification request message is sent by the AMF to the SMF.

In a second aspect, an embodiment of the present invention provides a session management system including: a terminal device and a network device; the terminal device is configured to send a session establishment request message to the network device, and the session establishment request message is used to request the establishment of a session; the network The device is configured to send a session establishment response message to the terminal device, and the session establishment response message carries the QoS information of the session; the terminal device is configured to retain the QoS capability supported by the terminal device when the QoS information of the above session exceeds the QoS capability supported by the terminal device Part of the QoS information in the QoS information of the session; the terminal device is configured to send a session modification request message to the network device, the session modification request message includes first indication information, and the first indication information is used to indicate that the terminal device is in the QoS information of the session Some unreserved QoS information. The network device is configured to release part of the QoS information in the QoS information of the session according to the first indication information.

In a possible design, part of the QoS information in the QoS information of the above session is retained, including one or a combination of the following: the default Qos rule in the QoS information of the above session is retained, and the Qos flow corresponding to the default Qos rule; priority Retain the guaranteed bit rate Qos flow, the guaranteed bit rate Qos rule and/or the packet filter included in the guaranteed bit rate Qos rule in the QoS information of the above session; preferentially retain the high priority Qos in the QoS information of the above session Packet filters included in flows, high-priority Qos rules, and/or high-priority Qos rules.

In a possible design, the second indication information is #26 insufficient resources.

In a possible design, the network device is SMF, the above system further includes AMF, and the above terminal device is configured to send a session establishment request message to the network device, including: the terminal device is configured to send a session establishment request message to AMF; AMF is configured to send The session establishment request message is sent to SMF.

In a possible design, the network device is the SMF, and the above system further includes an AMF. The network device is configured to send a session establishment response message to the terminal device. The SMF is configured to send a session establishment response message to the AMF; the AMF is configured as Send the session establishment response message to the terminal device.

In a possible design, the network device is SMF, the above system further includes AMF, the above terminal device is configured to send a session modification request message to the network device, including: the terminal device is configured to send a session modification request message to AMF; AMF is configured to send The session modification request message is sent to SMF.

In a third aspect, an embodiment of the present invention provides a session management method. The method includes: a terminal device sends a session establishment request message to a network device, and the session establishment request message is used to request a session establishment; the terminal device receives the session establishment sent by the network device The response message carries the session QoS information in the session establishment response message; when the session QoS information exceeds the QoS capability supported by the terminal device, part of the QoS information in the session QoS information is retained according to the QoS capability supported by the terminal device; the terminal device A session modification request message is sent to the network device, the session modification request message includes first indication information, and the first indication information is used to indicate a part of QoS information that the processor does not retain in the QoS information of the session.

Implementing the method described in the third aspect, the terminal device sends a session establishment request message to the network device, and receives the session establishment response message sent by the network device, where the session establishment response message carries the QoS information of the session. When the QoS information of the session exceeds the QoS capability supported by the terminal device, the terminal device retains part of the QoS information in the QoS information of the session according to the QoS support capability of the terminal device, and indicates to the network device that the terminal device is in the session modification request message. QoS information not retained in the QoS information of the above session. Through the embodiments of the present invention, the problem that the QoS information delivered by the network device cannot be supported due to the insufficient QoS capability of the terminal device during the session establishment process is solved, and the session context at both ends of the terminal and the network device is ensured to be consistent.

In a possible design, the network device is SMF, and the above terminal device sends a session establishment request message to the network device, including: the terminal device sends a session establishment request message to SMF through AMF.

In a possible design, the network device is SMF, and the terminal device receiving the session establishment response message sent by the network device includes: the terminal device receives the session establishment response message sent by SMF through AMF.

In a possible design, the network device is SMF, and the above terminal device sends a session modification request message to the network device, including: the terminal device sends a session establishment request message to SMF through AMF.

According to a fourth aspect, an embodiment of the present invention provides a terminal device. The terminal device includes: a processor, a memory, a transceiver, and a bus; the processor, the memory, and the transceiver can be connected to each other through a bus, and the transceiver is used to communicate with other communication devices. Communication; the memory is used to store program code and data; the processor calls the program code in the memory to perform the following operations:

The session establishment request message is sent to the network device through the transceiver, and the session establishment request message is used to request the establishment of the session. The session establishment request message does not carry the QoS capability supported by the terminal; The response message carries the QoS information of the session, and the QoS information of the session is determined by the network device according to the preset number of QoS;

Or, the session establishment request message is sent to the network device through the transceiver, and the session establishment request message is used to request the establishment of the session, and the session establishment request message carries the QoS capability supported by the terminal; the session establishment response message sent by the network device is received through the transceiver, and the session The establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

In a possible design, when the QoS capability supported by the terminal device is greater than the preset QoS quantity, the session establishment request message carries the QoS capability supported by the terminal, and when the QoS capability supported by the terminal device itself is less than or equal to the preset QoS quantity At this time, the session establishment request message does not carry the QoS capabilities supported by the terminal.

In a possible design, the QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device, including: If the QoS capability supported by the terminal device is less than or equal to the QoS capability supported by the network device, the QoS information of the session is The network device is determined according to the minimum value of the QoS capability supported by the network device, the user subscription information corresponding to the terminal device, and the QoS capability supported by the terminal device; if the QoS capability supported by the terminal is greater than the QoS capability supported by the network device, the QoS of the above session The information is determined by the network device according to the preset QoS number, the user subscription information corresponding to the terminal device, and the minimum value of the QoS capabilities supported by the terminal device.

In a possible design, the QoS information of the session is determined by the network device according to a preset number of QoS, including: The QoS information of the session is the network device according to the QoS capabilities supported by the network device, the user subscription information corresponding to the terminal device and The minimum value of the preset number of QoS is determined.

In a possible design, the QoS capabilities supported by the terminal device carried in the session establishment request message include one or a combination of: the maximum number of QoS flows supported by the terminal device; the maximum number of QoS rules supported by the terminal device; the terminal device support The maximum number of packet filters in the QoS rules.

In a possible design, the above QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, each of the one or more QoS rules contains one or more Packet filter.

In a possible design, the preset number of QoS includes one or a combination of the following parameters: the preset number of QoS flows; the preset number of QoS rules; and the preset number of packet filters.

In a possible design, the network device is SMF, and sending the session establishment request message to the network device through the transceiver includes: sending the session establishment request message to the AMF through the transceiver, and the session establishment request message is sent by the AMF to the SMF.

In a possible design, the network device is SMF, and the QoS information of the above session is determined by the SMF based on the QoS capabilities supported by the terminal device and the user subscription information corresponding to the terminal device. The user subscription information is SMF through unified data management (unified data management) , UDM) obtained from the device.

According to a fifth aspect, an embodiment of the present invention provides a network device, including: a processor, a memory, a transceiver, and a bus; the processor, the memory, and the transceiver can be connected to each other through a bus, and the transceiver is used to communicate with other communication devices Communication; the memory is used to store program code and data; the processor calls the program code in the memory to perform the following operations:

Receive the session establishment request message sent by the terminal device through the transceiver. The session establishment request message is used to request the establishment of the session. The session establishment request message does not carry the QoS capabilities supported by the terminal; the session establishment response message is sent to the terminal device through the transceiver. The response message carries the QoS information of the session, and the QoS information of the session is determined by the network device according to the preset number of QoS;

Or, receive the session establishment request message sent by the terminal device through the transceiver. The session establishment request message is used to request the establishment of the session. The session establishment request message carries the QoS capability supported by the terminal; the session establishment response message is sent to the terminal device through the transceiver. The establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

In a possible design, the network device is SMF, and receiving the session establishment request message sent by the terminal device through the transceiver includes: receiving the session establishment request message sent by the AMF through the transceiver. The session establishment request message is received by the AMF from the terminal device Arrived.

In a possible design, the network device is SMF, and sending the session establishment response message to the terminal device through the transceiver includes: sending the session establishment response message to the AMF through the transceiver, and the session establishment response message is sent by the AMF to the terminal device.

In a possible design, the network device is SMF, and the QoS information of the session is determined by the SMF according to the QoS capabilities supported by the terminal device and the user subscription information corresponding to the terminal device. The user subscription information is obtained by SMF through UDM.

In a sixth aspect, an embodiment of the present invention provides a session management system. The system includes: a terminal device and a network device; the terminal device is configured to send a session establishment request message to the network device, and the session establishment request message is used to request the establishment of a session. The establishment request message does not carry the QoS capabilities supported by the terminal; the network device is configured to send a session establishment response message to the terminal device, and the session establishment response message carries the QoS information of the session. The QoS information of the session is based on the preset amount of QoS definite;

Or, the terminal device is configured to send a session establishment request message to the network device, and the session establishment request message is used to request session establishment, and the session establishment request message carries the QoS capabilities supported by the terminal; the network device is configured to send the session establishment response message to the terminal device, The session establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

In a possible design, the network device is SMF, and the above system further includes AMF. The above network device is configured to send a session establishment response message to the terminal device, including: SMF is configured to send a session establishment response message to AMF; AMF is configured to configure the session The establishment response message is sent to the terminal device.

In a possible design, the network device is SMF, and the above system further includes UDM, wherein SMF is configured to send an acquisition request to UDM, and the acquisition request is used to acquire user subscription information corresponding to the terminal device; UDM is configured to send user subscription to SMF information.

In a seventh aspect, an embodiment of the present invention provides a session management method. The method includes: a terminal device sends a session establishment request message to a network device. The session establishment request message is used to request a session establishment, and the session establishment request message does not carry terminal support. QoS capability; the terminal device receives the session establishment response message sent by the network device, and the session establishment response message carries the QoS information of the session. The QoS information of the above session is determined by the network device according to the preset number of QoS;

Or, the terminal device sends a session establishment request message to the network device. The session establishment request message is used to request the session establishment. The session establishment request message carries the QoS capability supported by the terminal; the terminal device receives the session establishment response message sent by the network device, and the session establishment response The message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

Implementing the method described in the seventh aspect, the terminal device sends a session establishment request message to the network device. When the session establishment request message carries the QoS capabilities supported by the terminal device, the network device may determine the QoS of the session according to the QoS capabilities supported by the terminal device Information, when the session establishment request message does not carry the QoS capabilities supported by the terminal device, the network device determines the QoS information of the session according to the preset number of QoS. The terminal device receives the session establishment response message sent by the network device, and the session establishment response message carries the QoS information of the session. The embodiment of the present invention solves the problem that the terminal device cannot support the QoS information delivered by the network device due to the insufficient QoS capability of the terminal device during the session establishment process, and realizes the differentiated processing of terminal devices with different QoS requirements, which can be used for high QoS requirements The terminal equipment is configured with more QoS resources.

In a possible design, the QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device, including: If the QoS capability supported by the terminal device is less than or equal to the QoS capability supported by the network device, the QoS information of the session is The network device is determined according to the minimum value of the QoS capability supported by the network device, the user subscription information corresponding to the terminal device, and the QoS capability supported by the terminal device; if the QoS capability supported by the terminal is greater than the QoS capability supported by the network device, the The information is determined by the network device according to the preset QoS number, the user subscription information corresponding to the terminal device, and the minimum value of the QoS capabilities supported by the terminal device.

In an eighth aspect, an embodiment of the present invention provides a session management method. The method includes: a network device receives a session establishment request message sent by a terminal device. The session establishment request message is used to request a session establishment, and the session establishment request message does not carry a terminal Supported QoS capability; the network device sends a session establishment response message to the terminal device. The session establishment response message carries the session QoS information. The session QoS information is determined by the network device according to the preset number of QoS;

Or, the network device receives the session establishment request message sent by the terminal device, and the session establishment request message is used to request to establish a session, and the session establishment request message carries the QoS capabilities supported by the terminal; the network device sends a session establishment response message to the terminal device, and the session establishment response The message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

Implementing the method described in the eighth aspect, the network device receives the session establishment request message sent by the terminal device, and when the session establishment request message carries the QoS capability supported by the terminal device, the network device determines the QoS of the session according to the QoS capability supported by the terminal device Information, when the session establishment request message does not carry the QoS capabilities supported by the terminal device, the network device determines the QoS information of the session according to the preset number of QoS. The network device sends a session establishment response message to the terminal device, and the session establishment response message carries the QoS information of the session. The embodiment of the present invention solves the problem that the terminal device cannot support the QoS information delivered by the network device due to the insufficient QoS capability of the terminal device during the session establishment process, and realizes the differentiated processing of terminal devices with different QoS requirements, which can be used for high QoS requirements The terminal equipment is configured with more QoS resources.

In a possible design, the network device is SMF, and the network device receives the session establishment request message sent by the terminal device, including: the network device receives the session establishment request message sent by SMF through AMF.

In a possible design, the network device is SMF, and the above network device sends a session establishment response message to the terminal device, including: the network device sends a session establishment response message to the terminal device through AMF.

According to a ninth aspect, an embodiment of the present invention provides a terminal device. The terminal device may include a plurality of functional modules or units for correspondingly performing the session management method provided in the third aspect.

According to a tenth aspect, an embodiment of the present invention provides a terminal device. The terminal device may include a plurality of functional modules or units for correspondingly performing the session management method provided in the seventh aspect.

According to an eleventh aspect, an embodiment of the present invention provides a network device. The network device may include multiple function modules or units for correspondingly performing the session management method provided in the eighth aspect.

In a twelfth aspect, the present invention provides a communication chip. The communication chip may include: a processor, and one or more interfaces coupled to the processor. Wherein, the processor may be used to call the implementation program of the session management method provided in the third aspect from the memory and execute the instructions contained in the program. The interface may be used to output the data processing result of the processor.

In a thirteenth aspect, the present invention provides a communication chip. The communication chip may include: a processor, and one or more interfaces coupled to the processor. Wherein, the processor may be used to call the implementation program of the session management method provided in the seventh aspect from the memory, and execute the instructions contained in the program. The interface may be used to output the data processing result of the processor.

According to a fourteenth aspect, the present invention provides a communication chip. The communication chip may include: a processor, and one or more interfaces coupled to the processor. Wherein, the processor may be used to call the implementation program of the session management method provided in the eighth aspect from the memory, and execute the instructions contained in the program. The interface may be used to output the data processing result of the processor.

According to a fifteenth aspect, an embodiment of the present invention provides a computer-readable storage medium having instructions stored thereon, which when run on a computer, causes the computer to execute the session management method described in the third aspect.

According to a sixteenth aspect, an embodiment of the present invention provides a computer-readable storage medium having instructions stored on it, which when run on a computer, causes the computer to execute the session described in the eighth or ninth aspect Management methods.

According to a seventeenth aspect, an embodiment of the present invention provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the session management method described in the third aspect above.

In an eighteenth aspect, an embodiment of the present invention provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the session management method described in the eighth aspect or the ninth aspect.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

3 is a schematic structural diagram of a network device according to an embodiment of the present invention;

4 is a schematic flowchart of a session management method provided by an embodiment of the present invention;

5 is a schematic flowchart of another session management method according to an embodiment of the present invention;

6 is a schematic flowchart of another session management method according to an embodiment of the present invention;

7 is a schematic flowchart of another session management method according to an embodiment of the present invention;

8 is a schematic flowchart of another session management method according to an embodiment of the present invention;

9 is a schematic flowchart of another session management method according to an embodiment of the present invention;

10 is a schematic structural diagram of another terminal device according to an embodiment of the present invention;

11 is a schematic structural diagram of another terminal device according to an embodiment of the present invention;

12 is a schematic structural diagram of another network device device provided by an embodiment of the present invention;

13 is a schematic structural diagram of a communication chip according to an embodiment of the present invention.

detailed description

The terms used in the embodiment of the present invention are only used to explain specific examples of the present invention and are not intended to limit the present invention.

FIG. 1 shows a network architecture of a communication system 100 according to an embodiment of the present invention. As shown in FIG. 1, the communication system 100 may include: a terminal device 101, an (R) access network (AN) device 102, a user plane function (UPF) entity 103, and a data network (DN) Device 104, AMF entity 105, SMF entity 106 and UDM entity 107. Among them, UPF103, AMF105, SMF106 and UDM107 are all core network entities. among them:

The terminal device 101 may be distributed throughout the communication system 100, and may be stationary or mobile. In some embodiments of the present invention, the terminal device 101 may be a mobile device, mobile station (mobile station), mobile unit (mobile unit), M2M terminal, wireless unit, remote unit, terminal agent, mobile client, etc. The embodiments of the invention are not limited thereto.

(R) AN 102 may be a 5G base station, an NR base station, etc., and the terminal device 101 may access the communication system 100 through (R) AN 102. (R) AN 102 may also be a network composed of multiple (R) AN 102 nodes, which can implement functions such as wireless physical layer functions, resource scheduling, and wireless resource management. (R) AN 102 is connected to UPF 103 through user plane interface N3, which can be used to transmit data of terminal device 101; AN establishes a control plane signaling connection through control plane interface N2 and AMF 105, which can be used to implement wireless access bearer control, etc. Features.

UPF 103 can be used for packet routing and forwarding, user plane QoS processing, uplink traffic verification, transmission-level packet marking in uplink and downlink, downlink packet buffering, and downlink data notification trigger. UPF103 is connected to SMF106 through the N4 interface, and UPF103 is connected to the DN104 through the N6 interface. UPF103 is a conversation point where an external protocol data unit (protocol, data, unit, PDU) and data network are interconnected.

AMF 105 can be used for terminal device 101 authentication, SMF 106 selection, connection management, reachability management, liquidity management and other functions. AMF 105 is connected to SMF 106 through interface N11 and can be used to provide transmission of SM messages between terminal device 101 and SMF 106. The AMF 105 can serve as an anchor point for N1 and N2 signaling connections, and maintain and manage the state information of the terminal device 101.

SMF 106 is connected to AMF 105 through the N11 interface, and can be used for all control plane functions responsible for terminal device session management, including UPF 103 selection, network protocol (internet protocol, IP) address allocation, and session QoS attribute management. SMF 106 is connected to UPF 103 through interface N4, which can control the insertion and removal of uplink classifiers, and can also control the insertion and removal of UPF 103 that supports branch points.

UDM107 is used for user identification processing, supporting service/session continuity and user management. UDM107 can be used to store user subscription information corresponding to terminal devices. UDM107 is connected to AMF 105 through interface N8, and UDM107 is connected to SMF 106 through interface N10. AMF 105 and SMF 106 can obtain the above user subscription information from UDM 107.

It should be noted that each entity shown in FIG. 1 may be a single device physically, or two or more entities are integrated on the same physical device, which is not limited in this embodiment of the present invention.

In the embodiment of the present invention, the communication system 100 may be a 5G communication system, an NR system, or a future evolution communication system.

In the embodiment of the present invention, the core network entity may also be referred to as a core network device or a network device.

The network architecture of the communication system 100 shown in FIG. 1 is a possible implementation form of the QoS flow architecture. Based on the communication system 100, the terminal device 100 may establish one or more sessions with the core network, and the QoS flow is the minimum granularity for realizing QoS differentiation in the above sessions.

The above-mentioned session may be a PDU session. The above-mentioned PDU session may be a connection established between a terminal device and a data network. The connection may be used to provide PDU connection services. The type of the connection may be IP protocol, Ethernet, or other types.

For ease of understanding, the following describes technical terms involved in the embodiments of the present invention.

QoS flow: QoS flow is the finest granularity of QoS differentiation in PDU session. The QoS flow identifier (qos) identifier is used to identify the QoS flow in the 5G system. The user plane data with the same QFI in the PDU session will get the same forwarding processing (such as the same scheduling, the same access limit, etc.) QFI should be unique within a PDU session, which means that a PDU session can have multiple (up to 64) QoS flows, but the QFI of each QoS flow is different. In the 5G system, the QoS flow may be pre-configured by SMF or established through the PDU session establishment/modification process.

QoS flow includes guaranteed bit rate (guaranteed bit rate, GBR) QoS flow and non-GBR QoS flow. Whether a QoS flow is "GBR" or "Non-GBR" depends on its QoS configuration. The QoS configuration of a QoS flow includes the following QoS parameters: The QoS configuration of each QoS flow includes the QoS parameters of 5G Qos identifier (5G Qos identifier, 5QI) and allocation and retention priority (allocation and retention priority, ARP) ; The QoS configuration of each non-GBR QoS flow may also include the reflected Qos attribute (reflective Qos attribute, RQA); the QoS configuration of each GBR QoS flow also includes the parameter of the guaranteed flow bit rate (guaranteed flow bit rate, GFBR) and maximum flow bit rate (maximum flow bit rate, MFBR); the QoS configuration of each GBR QoS flow may also contain parameters for indication control and maximum packet loss rate; each QoS flow configuration has a Corresponding QFI.

QoS rules: QoS rules are used to perform classification and marking of upstream user plane data services, and terminal devices associate upstream data to corresponding QoS flows according to QoS rules. These QoS rules may be provided to the terminal device by the network side (that is, configured to the terminal device through signaling in the PDU session establishment/modification process), pre-configured on the terminal device, or implicitly derived by the terminal device using the reflective QoS mechanism.

A QoS rule may include: QFI of the associated QoS flow, Packet Filter Set, and priority. One or more QoS rules can be associated with the same QoS flow. The QoS rules provided by the network side to the terminal device include a QoS rule identifier, which is unique in the PDU session and generated by the SMF.

Each PDU session must be configured with a default QoS rule, which is associated with a QoS flow. For IP-type or Ethernet-type PDU sessions, the default QoS rule is that the only packet filtering set in a PDU session can contain QoS rules that allow all upstream packets to pass through the packet filter. For unstructured (Unstructured) PDU sessions, the default QoS rules do not contain any packet filter sets, and the default QoS rules define how all data packets in the PDU session are handled.

Packet filter: The packet filter set of QoS rules on the terminal device side is used to identify the data flow. A packet filter set can contain multiple packet filters, and each packet filter can be downstream or upstream or bidirectional. Each packet filter corresponds to a packet filter identifier.

Referring to FIG. 2, FIG. 2 shows a terminal device 200 provided by an embodiment of the present invention. As shown in FIG. 2, the terminal device 200 may include: one or more terminal device processors 201, memory 202, communication interface 203, receiver 205, transmitter 206, coupler 207, antenna 208, and terminal device interface 209. These components may be connected through the bus 204 or other means. FIG. 2 takes the connection through the bus as an example. among them:

The communication interface 203 may be used for the terminal device 200 to communicate with other communication devices, such as network devices. Specifically, the network device may be the network device 200 shown in FIG. 3. Specifically, the communication interface 203 may be a 5G communication interface or a communication interface of a new air interface in the future. Not limited to the wireless communication interface, the terminal device 200 may also be configured with a wired communication interface 203, such as a local access network (LAN) interface. The transmitter 206 may be used to transmit the signal output by the terminal device processor 201. The receiver 205 can be used for receiving and processing the mobile communication signal received by the antenna 208.

In some embodiments of the present invention, the transmitter 206 and the receiver 205 may be regarded as a wireless modem. In the terminal device 200, the number of the transmitter 206 and the receiver 205 may be one or more. The antenna 208 may be used to convert electromagnetic energy in the transmission line into electromagnetic waves in free space, or convert electromagnetic waves in free space into electromagnetic energy in transmission lines. The coupler 207 is used to divide the mobile communication signal received by the antenna 208 into multiple channels and distribute it to multiple receivers 205.

In addition to the transmitter 206 and the receiver 205 shown in FIG. 2, the terminal device 200 may further include other communication components, such as a GPS module, a Bluetooth module, a wireless fidelity (Wi-Fi) module, and so on. Not limited to wireless communication, the terminal device 200 may also be configured with a wired network interface (such as a LAN interface) to support wired communication.

The terminal device 200 may further include an input and output module. The input and output module can be used to implement the interaction between the terminal device 200 and the terminal device/external environment, and can mainly include an audio input and output module, a key input module, and a display. Specifically, the input and output module may further include: a camera, a touch screen, a sensor, and so on. The input and output modules communicate with the terminal device processor 201 through the terminal device interface 209.

The memory 202 is coupled to the terminal device processor 201 and is used to store various software programs and/or multiple sets of instructions. Specifically, the memory 202 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 202 may store an operating system (hereinafter referred to as a system), such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX. The memory 202 may also store a network communication program, which may be used to communicate with one or more additional devices, one or more terminal devices, and one or more network devices.

In some embodiments of the present invention, the memory 202 may be used to store an implementation program of the session management method provided by one or more embodiments of the present invention on the terminal device 200 side. For the implementation of the session management method provided by one or more embodiments of the present invention, please refer to the subsequent embodiments.

The terminal device processor 201 may be used to read and execute computer-readable instructions. Specifically, the terminal device processor 201 may be used to call a program stored in the memory 202, for example, an implementation program of the session management method provided by one or more embodiments of the present invention on the terminal device 200 side, and execute the instructions contained in the program .

It can be understood that the terminal device 200 may be the terminal device 101 in the communication system 100 shown in FIG. 1, and may be implemented as a mobile device, a mobile station (mobile station), a mobile unit (mobile unit), a wireless unit, a remote unit, a terminal Device agents, mobile clients, etc.

It should be noted that the terminal device 200 shown in FIG. 2 is only an implementation manner of the embodiment of the present invention. In actual applications, the terminal device 200 may further include more or fewer components, which is not limited herein.

Referring to FIG. 3, FIG. 3 shows a network device 300 provided by an embodiment of the present invention. As shown in FIG. 3, the network device 300 may include: one or more network device processors 301, a memory 302, and a communication interface 303. These components may be connected through the bus 304 or other types. FIG. 3 takes the connection through the bus as an example. among them:

The communication interface 303 may be used for the network device 300 to communicate with other communication devices, such as terminal devices or other network devices. Specifically, the communication interface 303 may be a 5G communication interface or a communication interface of a new air interface in the future. Not limited to the wireless communication interface, the network device 300 may also be configured with a wired communication interface 303 to support wired communication. For example, the backhaul link between one network device 300 and other network devices 300 may be a wired communication connection.

The memory 302 is coupled to the network device processor 301 and is used to store various software programs and/or multiple sets of instructions. Specifically, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 302 may store an operating system (hereinafter referred to as a system), such as embedded operating systems such as uCOS, VxWorks, and RTLinux. The memory 302 may also store a network communication program, which may be used to communicate with one or more additional devices, one or more terminal devices, and one or more network devices.

In the embodiment of the present invention, the network device processor 301 may be used to read and execute computer-readable instructions. Specifically, the network device processor 301 may be used to call a program stored in the memory 302, for example, an implementation program of the session management method provided by one or more embodiments of the present invention on the network device 300 side, and execute instructions contained in the program .

It can be understood that the network device 300 may be a core network entity in the communication system 100 shown in FIG. 1, such as UPF 103, AMF 105, SMF 106, or UDM 107.

It should be noted that the network device 300 shown in FIG. 3 is only an implementation manner of the embodiment of the present invention. In practical applications, the network device 300 may further include more or fewer components, which is not limited herein.

In the session establishment phase, the number of packet filters in the Qos flow, Qos rules, and/or Qos rules carried in the session establishment response message delivered by the network is greater than the maximum number supported by the terminal device. The 5G protocol does not define How should the terminal equipment deal with such anomalies. Since the protocol does not define the method for handling such anomalies, terminal manufacturers usually use the following methods for handling. Method 1: The terminal device does not perform session establishment, that is, the terminal device selects to release the packet filter in the newly added Qos flow, Qos rule, and/or Qos rule delivered by the network. Method 2: The terminal device chooses to establish a session according to the capabilities supported by the terminal device, that is, the terminal device retains part of the information in the Qos flow, Qos rules, and/or packet filters in the Qos rules delivered by the network according to the capabilities supported by the terminal device. For the first method, since the session establishment is triggered by the application (APP) service on the terminal device side, the non-execution of the terminal device will affect the normal service execution; in addition, because the upper-layer APP service is not established, the APP service will trigger the session establishment again The Qos resources delivered by the network may still exceed the Qos resources that the terminal can support. Therefore, this method will affect the normal operation of the data service, and will also bring additional power consumption and signaling interaction. For method two, the terminal only retains part of the Qos resources, but since the network establishment session is not notified of abnormal session establishment during the session establishment process, this method will lead to inconsistent session context information between the terminal device and the network side, which will ultimately affect data services. The information includes Qos flow and/or Qos rules.

Therefore, there is still a problem to be solved on how to resolve the above exceptions on the premise of ensuring that the session context information at both ends of the terminal device and the network side is consistent and the data service is normally performed.

In order to solve the above problems, an embodiment of the present invention also provides a session management method. 4 is a schematic flowchart of a session management method provided by an embodiment of the present invention. As shown in FIG. 4, the session management method provided by the embodiment of the present invention includes but is not limited to steps S401 to S403. The possible implementation of the method embodiment is further described below.

S401: The terminal device sends a session establishment request message to the network device, and the network device receives the session establishment request message sent by the terminal device. The session establishment request message is used to request the establishment of a session.

S402: The network device sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the network device. The session establishment response message carries session QoS information.

Optionally, the QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, and each of the one or more QoS rules includes one or more packet filters Device.

Optionally, the QoS capabilities supported by the terminal device include one or a combination of: the maximum number of QoS flows supported by the terminal device; the maximum number of QoS rules supported by the terminal device; the maximum packet filter in the QoS rules supported by the terminal device Quantity.

S403: When the QoS information of the session exceeds the QoS capability supported by the terminal device, the terminal device retains part of the QoS information in the QoS information of the session according to the QoS support capability of the terminal device.

Optionally, the QoS information of the session exceeds the support capability of the terminal, including one or more of the following cases: the number of QoS flows in the QoS information of the session is greater than the maximum number of QoS flows supported by the terminal device; the QoS of the session The number of QoS rules in the information is greater than the maximum number of QoS rules supported by the terminal device; the number of packet filters in the QoS information of the above session is greater than the maximum number of packet filters supported by the terminal device.

Optionally, the strategies for retaining part of the QoS information in the QoS information of the above-mentioned session include one or more of the following strategies 1 to 3:

Strategy 1: Keep the default QoS rules and the QoS flow corresponding to the default QoS rules;

Strategy 2: Prioritize the retention of GBR QoS flow, GBR QoS flow associated QoS rules (referred to as GBR Qos rules) and/or GBR QoS flow associated QoS rules contained in packet filters (referred to as GBR packet filters);

Strategy 3: Prioritize the retention of high priority QoS flows, high priority QoS rules and/or packet filters contained in high priority QoS rules.

In the embodiment of the present invention, if the strategy for retaining part of the QoS information in the QoS information of the session includes multiple strategies in strategy 1 to strategy 3, the execution order of the multiple strategies is not limited.

Optionally, case 1: the strategy for retaining part of the QoS information in the QoS information of the session includes strategy 1 to strategy 3, and the execution order of strategy 1 to strategy 3 is strategy 1, strategy 2, and strategy 3. The QoS information carried in the session establishment response message sent by the network device is called first QoS information, and the first QoS information includes QoS flow and QoS rules, and the QoS rules include packet filters. The terminal device reserves part of the QoS information in the first QoS information according to the QoS support capability of the terminal device, and may include the following steps:

Step 1: If the first QoS information includes the default QoS rule, the default QoS rule, the packet filter in the default QoS rule, and the QoS flow corresponding to the default QoS rule are retained. Let the number of packet filters in the QoS flow, default QoS rule, and default QoS rule associated with the default QoS rule be A1, B1, and C1, respectively. If the first condition is met, step two is performed, and the first condition is one or a combination of the following conditions: A1 is less than the maximum number of QoS flows supported by the terminal device; B1 is less than the maximum number of QoS rules supported by the terminal device; C1 is less than the terminal device The maximum number of packet filters supported.

Step 2: QoS information that has not been retained in the first QoS information after step 1 is called second QoS information. In the second QoS information, GBR QoS flows, GBR QoS rules, and GBR packet filters are preferentially reserved. The cumulative number of reserved QoS flows, QoS rules and packet filters in steps 1 and 2 are A2, B2 and C2, respectively. If the second condition is met, step 3 is performed, and the second condition is one or a combination of the following conditions: A2 is less than the maximum number of QoS flows supported by the terminal device; B2 is less than the maximum number of QoS rules supported by the terminal device; C2 is less than the terminal device The maximum number of packet filters supported.

Optionally, if the number of GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device Minus B1, the number of GBR packet filters in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1, then the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A1, the number of GBRQoS rules in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device B1, the number of GBR packet filters in the second QoS information is greater than the maximum number of packet filters supported by the terminal device minus C1, then part of the GBR packet filters are retained in the second QoS information according to the packet filter retention rules, the second QoS The number of packet filters retained in the message is less than or equal to the maximum number of packet filters supported by the terminal device minus C1. If the second condition is satisfied, the terminal device performs step three.

Optionally, the packet filter retention rule is: each QoS rule reserves at least one packet filter, and based on this, the packet filter is randomly retained among the packet filters included in the multiple QoS rules.

Optionally, the packet filter retention rules are: each QoS rule reserves at least one packet filter, and the QoS rules with high priority contain packet filters with higher priority than those with QoS rules with low priority. On this basis, among the packet filters included in multiple QoS rules, the packet filters with higher priority are reserved first.

Optionally, if the number of GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is greater than the maximum number of QoS rules supported by the terminal device B1. The number of packet filters in the GBR QoS rule in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1, and the high priority GBR QoS rule is retained in the second QoS information. The second The number of QoS rules retained in the QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the second condition is satisfied, the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is greater than the maximum number of QoS rules supported by the terminal device B1. The number of GBR packet filters in the second QoS information is greater than the maximum number of packet filters supported by the terminal device minus C1, and the high-priority GBR QoS rules are retained in the second QoS information. The above-mentioned GBR QoS rules retain The number of QoS rules is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the number of packet filters included in the reserved GBR QoS rule in the second QoS information is greater than the maximum number of packet filters supported by the terminal device minus C1, the basis is included in the packet filters included in the reserved GBR QoS rule The packet filter retention rule retains some GBR packet filters, and the number of GBR packet filters retained in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1. If the second condition is satisfied, the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is greater than the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1, the number of GBR packet filters in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1, then the QoS flow with high priority and the GBR associated with the QoS flow are retained in the second QoS information Rules, the number of QoS flows retained in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the second condition is satisfied, the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is greater than the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. The number of GBR packet filters in the second QoS information is greater than the maximum number of packet filters supported by the terminal device minus C1, then the QoS flow with high priority and the GBR QoS rules associated with the QoS flow are retained in the second QoS information , The number of reserved GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the number of GBR packet filters included in the QoS rules associated with the reserved GBR QoS flow is still greater than the maximum number of packet filters supported by the terminal device minus C1, the GBR packets included in the QoS rules associated with the reserved GBR QoS flow Part of the packet filter is retained in the filter according to the packet filter retention rule, and the number of GBR packet filters retained in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1. If the second condition is satisfied, the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is greater than the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is greater than the maximum number of QoS rules supported by the terminal device minus B1 2. The number of GBR packet filters in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1, then the QoS flow with high priority and the GBR QoS rules associated with the QoS flow are retained in the second QoS information , The number of reserved GBR QoS flows in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the number of QoS rules associated with the reserved GBR QoS flow is still greater than the maximum number of QoS rules supported by the terminal device minus B1, the QoS rules with high priority are retained in the QoS rules associated with the reserved GBR QoS flow, second The number of GBR QoS rules retained in the QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the second condition is satisfied, the terminal device performs step three.

Optionally, if the number of GBR QoS flows in the second QoS information is greater than the maximum number of QoS flows supported by the terminal device minus A1, the number of GBR QoS rules in the second QoS information is greater than the maximum number of QoS rules supported by the terminal device minus B1 2. The number of GBR packet filters in the second QoS information is greater than the maximum number of packet filters supported by the terminal device minus C1, and the high-priority QoS flow and the GBR QoS rules associated with the QoS flow are retained in the second QoS information. The number of QoS flows retained in the second QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the number of QoS rules associated with the reserved GBR QoS flow is still greater than the maximum number of QoS rules supported by the terminal device minus B1, the QoS rules with high priority are retained in the QoS rules associated with the reserved GBR QoS flow, second The number of GBR QoS rules retained in the QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B1. If the number of GBR packet filters included in the above reserved GBR QoS rules is still greater than the maximum number of packet filters supported by the terminal device minus C1, then the GBR packet filters included in the above reserved GBR QoS rules are reserved based on the packet filters The rule retains some packet filters, and the number of GBR packet filters retained in the second QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C1. If the second condition is satisfied, the terminal device performs step three.

Step 3: QoS information that has not been retained in the second QoS information after step 2 is called third QoS information. In the third QoS information, a QoS flow with a high priority, a QoS rule with a high priority, and a packet filter with a high priority are retained in priority.

Optionally, if A2 is equal to the maximum number of QoS flows supported by the terminal device, B2 is equal to the maximum number of QoS rules supported by the terminal device, and C2 is less than the maximum number of packet filters supported by the terminal device, then the packet filter reservation rule is reserved For some packet filters, the number of packet filters reserved in the third QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C2.

Optionally, if A2 is equal to the maximum number of QoS flows supported by the terminal device, B2 is less than the maximum number of QoS rules supported by the terminal device, and C2 is less than the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For QoS rules with high priority, the number of QoS rules retained in the third QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus B2. If the number of packet filters included in the reserved QoS rules in the third QoS information is still greater than the maximum number of packet filters supported by the terminal device, the packet filters included in the reserved QoS rules are reserved according to the packet filter retention rules For some packet filters, the number of packet filters reserved in the third QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C2.

Optionally, if A2 is less than the maximum number of QoS flows supported by the terminal device, B2 is equal to the maximum number of QoS rules supported by the terminal device, and C2 is less than the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For the QoS flow with high priority and the QoS rules associated with the QoS flow, the number of QoS flows retained in the third QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A2. If the number of packet filters included in the QoS rules associated with the reserved QoS flow is still greater than the maximum number of packet filters supported by the terminal device, then the packet filters included in the QoS rules associated with the reserved QoS flow are filtered based on packets The reserved rule of the filter retains part of the packet filters, and the number of the reserved packet filters of the third QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C2.

Optionally, if A2 is less than the maximum number of QoS flows supported by the terminal device, B2 is less than the maximum number of QoS rules supported by the terminal device, and C2 is less than the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For the QoS flow with high priority and the QoS rules associated with the QoS flow, the number of QoS flows retained in the third QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A2. If the number of QoS rules associated with the QoS flow retained in the third QoS information is still less than the maximum number of QoS rules supported by the terminal device, the QoS rules associated with the QoS flow retained in the third QoS information are preferentially retained Rules, the number of QoS rules retained in the third QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B2. If the number of packet filters included in the reserved QoS rules in the third QoS information is still greater than the maximum number of packet filters supported by the terminal device, the packet filters included in the reserved QoS rules are reserved according to the packet filter retention rules For some packet filters, the number of packet filters reserved in the third QoS information is less than or equal to the maximum number of packet filters supported by the terminal device minus C2.

Optionally, if A2 is equal to the maximum number of QoS flows supported by the terminal device, B2 is less than the maximum number of QoS rules supported by the terminal device, and C2 is equal to the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For QoS rules with high priority, the number of QoS rules retained in the third QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B2.

Optionally, if A2 is less than the maximum number of QoS flows supported by the terminal device, B2 is equal to the maximum number of QoS rules supported by the terminal device, and C2 is equal to the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For the QoS flow with high priority and the QoS rules associated with the QoS flow, the number of QoS flows retained in the third QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A2.

Optionally, if A2 is less than the maximum number of QoS flows supported by the terminal device, B2 is less than the maximum number of QoS rules supported by the terminal device, and C2 is equal to the maximum number of packet filters supported by the terminal device, the third QoS information is preferentially retained For the QoS flow with high priority and the QoS rules associated with the QoS flow, the number of QoS flows retained in the third QoS information is less than or equal to the maximum number of QoS flows supported by the terminal device minus A2. If the number of QoS rules associated with the QoS flow retained in the third QoS information is still less than the maximum number of QoS rules supported by the terminal device, the QoS rules associated with the QoS flow retained in the third QoS information are preferentially retained Rules, the number of QoS rules retained in the third QoS information is less than or equal to the maximum number of QoS rules supported by the terminal device minus B2.

Optionally, case 2: the strategy for retaining part of the QoS information in the QoS information of the above-mentioned session includes strategy 1 to strategy 3, and the execution order of strategy 1 to strategy 3 is strategy 2, strategy 1, and strategy 3. For a specific implementation manner in which the terminal device retains part of the QoS information in the QoS information according to the QoS support capability of the terminal device, reference may be made to the specific implementation manner in case 1, and details are not described herein again.

S404: The terminal device sends a session modification request message to the network device, and the network device receives the session modification request message sent by the terminal device. The session modification request message includes first indication information, and the first indication information is used to indicate the QoS information of the terminal device in the session Part of the QoS information that is not reserved.

Optionally, the first indication information carries an identifier of some QoS information that is not reserved.

It can be understood that, in order to ensure that the session contexts at both ends of the terminal and the network device are consistent, the session modification request message is used to indicate to the network device that the terminal device does not retain part of the QoS information in the QoS information of the session.

Optionally, the first indication information carries the QFI of the unreserved QoS flow, the identifier of the unreserved QoS rule, and the identifier of the unreserved packet filter.

Optionally, the session modification request message further includes second indication information, and the second indication information is used to indicate that the terminal device has insufficient Qos capability.

For example, the second instruction information is #26 insufficient resources.

Optionally, the session modification request message further includes third indication information, and the third indication information is used to indicate a cause of insufficient QoS capability of the terminal device.

Optionally, the causes of insufficient QoS capabilities include one or a combination of the following: insufficient QoS flow capabilities; insufficient QoS rule capabilities; and insufficient packet filter capabilities.

For example, the reason codes for insufficient QoS capabilities include #A, #B, and #C. #A, #B, and #C are used to indicate insufficient QoS flow capabilities, insufficient QoS rule capabilities, and insufficient packet filter capabilities, respectively. For example, if the QoS rule capability is insufficient and the packet filter capability is insufficient, the third indication information includes reason codes #B and #C.

For example, the reason codes for insufficient QoS capabilities include #A, #B, #C, #D, #E, #F, and #G. #A, #B and #C are used to indicate insufficient QoS flow capability, insufficient QoS rule capability and packet filter capability; #D is used to indicate insufficient QoS flow capability and insufficient QoS rule capability; #E is used to indicate QoS rule Insufficient capabilities and insufficient packet filter capabilities; #F is used to indicate insufficient QoS flow capabilities; and packet filter insufficient capabilities; #G is used to indicate insufficient QoS flow capabilities, insufficient QoS rule capabilities, and insufficient packet filter capabilities. For example, if the QoS rule capability is insufficient and the packet filter capability is insufficient, the third indication information includes reason code #E.

Optionally, the baseband (MODEM) module of the terminal device notifies the application program (AP) module of the terminal device through a common interface (such as an AT command interface) that the terminal device has insufficient QoS capabilities.

Optionally, the baseband (MODEM) module of the terminal device notifies the application program (AP) module of the terminal device through a common interface (for example, the AT command interface) to send the cause of the insufficient QoS capability of the terminal device.

S405: The network device releases part of the QoS information in the QoS information of the session according to the first instruction information.

It can be understood that, by releasing the QoS information not retained by the terminal device in the QoS information of the session, the network device ensures that the session context of the terminal and the network device is consistent, and further guarantees the normal operation of the data service.

In the embodiment of the present invention, the network device receives the session establishment request message sent by the terminal device, and sends a session establishment response message to the terminal device, where the session establishment response message carries session QoS information. When the QoS information of the session exceeds the QoS capability supported by the terminal device, the terminal device retains part of the QoS information in the QoS information of the session according to the QoS support capability of the terminal device, and indicates to the network device that the terminal device is in the session modification request message. Part of the QoS information not retained in the QoS information of the above session. Through the embodiments of the present invention, the problem that the QoS information delivered by the network device cannot be supported due to the insufficient QoS capability of the terminal device during the session establishment process is solved, and the session context at both ends of the terminal and the network device is ensured to be consistent.

Optionally, if the above network device is SMF, the flow of the above session management method is shown in FIG. 5, wherein the foregoing step S401 may further include S4011 and S4012, the foregoing step S402 may further include S4021 and S4022, and the foregoing step S404 may further Including S4041 and S4042. among them,

S4011: The terminal device sends a session establishment request message to the AMF, and the AMF receives the session establishment request message sent by the terminal device.

S4012: AMF sends a session establishment request message to SMF.

For example, the above session establishment request message is PDU SESSION ESTABLISHMENT REQUEST.

S4021: The SMF sends a session establishment response message to the AMF. The AMF receives the session establishment response message sent by the SMF. The session establishment response message carries the QoS information of the session.

S4022: The AMF sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the AMF.

For example, the above session establishment response message is PDU SESSIONESTABLISHMENT ACCEPT.

S4041: The terminal device sends a session modification request message to the AMF. The AMF receives the session modification request message sent by the terminal device. The session modification request message includes first indication information. The first indication information is used to indicate that the terminal device is not in the QoS information of the session. Some reserved QoS information.

S4042: AMF sends a session modification request message to SMF.

For example, the above session modification request message is PDU SESSION MODIFICATION REQUEST.

An embodiment of the present invention provides a session management method. 6 is a schematic flowchart of a session management method provided by an embodiment of the present invention. As shown in FIG. 6, the session management method provided by the embodiment of the present invention includes but is not limited to steps S501 to S503. The possible implementation of the method embodiment is further described below.

S501: The terminal device sends a session establishment request message to the network device, and the network device receives the session establishment request message sent by the terminal device. The above session establishment request message is used to request session establishment, and the session establishment request message carries the QoS capabilities supported by the terminal device.

Optionally, there are the following two implementation manners in the embodiments of the present invention:

In the first embodiment, regardless of whether a preset quantity is set and whether the QoS capability supported by the terminal device itself is greater than the preset QoS quantity, the session establishment request message carries the QoS capability supported by the terminal device.

According to the second embodiment, when the QoS capability supported by the terminal device itself is greater than the preset number of QoS, the session establishment request message carries the QoS capability supported by the terminal device. When the QoS capability supported by the terminal device itself is less than or equal to the preset number of QoS, the session establishment request message does not carry the QoS capability supported by the terminal device.

Optionally, the above-mentioned preset number of QoS is pre-defined by the terminal device and the operator, and the number of QoS pre-defined by the terminal device and the operator can ensure the business development of most users in the future.

Optionally, the QoS capabilities supported by the terminal device carried in the session establishment request message include one or a combination of: the maximum number of QoS flows supported by the terminal device; the maximum number of QoS rules supported by the terminal device; the QoS rules supported by the terminal device The maximum number of packet filters in.

Optionally, the preset number of QoS includes one or a combination of the following parameters: the preset number of QoS flows; the preset number of QoS rules; and the preset number of packet filters.

It can be understood that in the second embodiment, the terminal equipment and the operator pre-defined number of QoS can ensure the business development of most users in the future. When the terminal equipment itself supports a QoS capability greater than the preset number of QoS, the terminal equipment establishes a session The request message carries the QoS capabilities supported by the terminal, and is used to inform the network device that the terminal device supports the QoS capability greater than or equal to the preset number of QoS, so as to obtain more QoS resources, thereby improving the data service processing capability of the terminal device.

S502: The network device generates a session establishment response message, and the session establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device.

Optionally, the QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, and each QoS rule in the one or more QoS rules includes one or more packet filters.

Optionally, in the first embodiment, the network device determines the QoS information of the session according to the QoS capability supported by the terminal device, including: if the network device determines that the QoS capability supported by the terminal device is less than or equal to the QoS capability supported by the network device, the network device determines The QoS capability supported by the network device, the number of QoS in the user subscription information corresponding to the terminal device and the minimum value among the QoS capabilities supported by the terminal device determine the amount of QoS information for the session, and the amount of QoS information for the session is less than or equal to the minimum value; If the network device determines that the QoS capability supported by the terminal device is greater than the QoS capability supported by the network device, the network device determines the QoS information of the session according to the number of QoS in the user subscription information corresponding to the terminal device and the minimum value of the QoS capabilities supported by the terminal device, The number of QoS information of the session is less than or equal to the minimum value.

Optionally, in the second embodiment, the network device determines the QoS information of the session according to the QoS capabilities supported by the terminal device, including: if the network device determines that the QoS capabilities supported by the terminal device is less than or equal to the QoS capabilities supported by the network device, the network device determines The QoS capability supported by the network device, the number of QoS in the user subscription information corresponding to the terminal device and the minimum value among the QoS capabilities supported by the terminal device determine the amount of QoS information for the session, and the amount of QoS information for the session is less than or equal to the minimum value; If the network device determines that the QoS capability supported by the terminal device is greater than the QoS capability supported by the network device, the network device determines the minimum number of QoS capabilities supported by the terminal device according to the preset QoS number, the QoS number in the user subscription information corresponding to the terminal device Determine the QoS information of the session. The number of QoS information of the session is less than or equal to the minimum value.

In the embodiment of the present invention, the number of QoS in the user subscription information includes the number of subscribed QoS flows, the number of subscribed QoS rules, and/or the number of subscribed packet filters.

The following uses the second embodiment as an example to further describe a specific implementation manner in which the network device determines the QoS information of the session according to the QoS capabilities supported by the terminal device.

Optionally, in the second embodiment, if the QoS capability supported by the terminal device includes the maximum number of QoS flows supported by the terminal device, and the preset QoS number includes the preset number of QoS flows, the network device supports The QoS capability determines the number of QoS flows in the QoS information of the above session, including:

If the network device determines that the maximum number of QoS flows supported by the terminal device is less than or equal to the maximum number of QoS flows supported by the network device, the network device subscribes to the QoS in the user subscription information corresponding to the terminal device according to the maximum number of QoS flows supported by the network device The minimum value of the number of flows and the maximum number of QoS flows supported by the terminal device determines the number of QoS flows of the session, the minimum value is a first value, and the number of QoS flows in the QoS information of the session is less than or equal to the first value ; If the network device determines that the maximum number of QoS flows supported by the terminal device is greater than the maximum number of QoS flows supported by the network device, the network device subscribes to the QoS flows subscribed in the user subscription information corresponding to the terminal device according to the preset number of QoS flows The minimum value of the number and the maximum number of QoS flows supported by the terminal device determines the number of QoS flows of the session. The minimum value is a second value, and the number of QoS flows in the QoS information of the session is less than or equal to the second value.

Optionally, in the second embodiment, if the QoS capability supported by the terminal device includes the maximum number of QoS rules supported by the terminal device, and the preset QoS number includes the preset number of QoS rules, the network device supports The QoS capability determines the number of QoS rules in the session's QoS information, including:

If the network device determines that the maximum number of QoS rules supported by the terminal device is less than or equal to the maximum number of QoS rules supported by the network device, the network device subscribes to the QoS in the user subscription information corresponding to the terminal device according to the maximum number of QoS rules supported by the network device The minimum of the number of rules and the maximum number of QoS rules supported by the terminal device determines the number of QoS rules for the session, the minimum value is a third value, and the number of QoS rules in the QoS information of the session is less than or equal to the third value ; If the network device determines that the maximum number of QoS rules supported by the terminal device is greater than the maximum number of QoS rules supported by the network device, the network device subscribes to the QoS rules in the user subscription information corresponding to the terminal device according to the preset number of QoS rules The minimum value of the number and the maximum number of QoS rules supported by the terminal device determines the number of QoS rules of the session, the minimum value is a fourth value, and the number of QoS rules in the QoS information of the session is less than or equal to the fourth value.

Optionally, in the second embodiment, if the QoS capabilities supported by the terminal device include the maximum number of packet filters in the QoS rules supported by the terminal device, and the preset number of QoS includes the preset number of packet filters, then The network device determines the number of packet filters in the QoS information of the session according to the QoS capabilities supported by the terminal device, including:

If the network device determines that the maximum number of packet filters supported by the terminal device is less than or equal to the maximum number of packet filters supported by the network device, the network device determines the maximum number of packet filters supported by the network device and the user subscription information corresponding to the terminal device. The minimum value of the number of subscribed packet filters and the maximum number of packet filters supported by the terminal device determines the number of packet filters of the session. The minimum value is the fifth value. The packet filter in the QoS information of the session The number is less than or equal to the above fifth value; if the network device determines that the maximum number of packet filters supported by the terminal device is greater than the maximum number of packet filters supported by the network device, the network device corresponds to the terminal device according to the preset number of packet filters The minimum value of the number of packet filters subscribed in the user subscription information and the maximum number of packet filters supported by the terminal device determines the number of session packet filters. The minimum value is the sixth value. The QoS information in the session The number of packet filters is less than or equal to the above-mentioned sixth value.

Optionally, in the second embodiment, if the QoS capabilities supported by the terminal device include the maximum number of QoS flows supported by the terminal device, the maximum number of QoS rules supported by the terminal device, and the maximum number of packet filters supported by the terminal device, then The network device determines the number of QoS flows, QoS rules, and packet filters in the QoS information of the session according to the QoS capabilities supported by the terminal device. The following steps may be included:

Step 1: The network device determines the M QoS flows in the QoS information of the above session, and the QoS parameters of each QoS flow include the ARP and QFI corresponding to the QoS flow. If the maximum number of QoS flows supported by the terminal device is less than or equal to the maximum number of QoS flows supported by the network device, and M is less than or equal to the first value, if the maximum number of QoS flows supported by the terminal device is greater than the maximum number of QoS flows supported by the network device, M is less than or equal to the second value,

Step 2: The network device generates N QoS rules in the QoS information of the above session according to the QoS policy of the core network and the user's subscription information, etc. The N QoS rules include H packet filters. Any one of the N QoS rules is associated with one of the M QoS flows. The QoS rule contains the QFI, priority and one or more packet filters of the associated QoS flow. If the maximum number of QoS rules supported by the terminal device is less than or equal to the maximum number of QoS rules supported by the network device, and M is less than or equal to the third value, if the maximum number of QoS rules supported by the terminal device is greater than the maximum number of QoS rules supported by the network device, M is less than or equal to the fourth value. If the maximum number of packet filters supported by the terminal device is less than or equal to the maximum number of packet filters supported by the network device, M is less than or equal to the fifth value, if the maximum number of packet filters supported by the terminal device is greater than the packet filters supported by the network device The maximum number, M is less than or equal to the sixth value.

For the specific implementation manner of the first embodiment, reference may be made to the specific implementation manner of the second embodiment, and details are not described herein again.

S503: The network device sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the network device.

In the embodiment of the present invention, the session establishment request message sent by the terminal device to the network device carries the QoS capabilities supported by the terminal device, thereby notifying the network device of the QoS capabilities supported by the terminal device. The network device may determine the number of QoS flows, QoS rules and/or packet filters in the QoS information according to the QoS capabilities supported by the terminal device, and the session establishment response message sent by the network device to the terminal device carries the QoS information of the session. The embodiment of the present invention solves the problem that the terminal device cannot support the QoS information delivered by the network device due to the insufficient QoS capability of the terminal device during the session establishment process, and realizes the differentiated processing of terminal devices with different QoS requirements, which can be used for high QoS requirements The terminal equipment is configured with more QoS resources.

Optionally, if the above network device is SMF, the flow of the above session management method is shown in FIG. 7, wherein the foregoing step S501 may further include S5011 and S5012, and the foregoing step S503 may further include S5031 and S5032, the method shown in FIG. 7 Steps S504-S505 are also included. among them,

S5011: The terminal device sends a session establishment request message to the AMF. The AMF receives the session establishment request message sent by the terminal device. The above session establishment request message is used to request the session establishment. The session establishment request message carries the QoS capabilities supported by the terminal device.

S5012: AMF sends a session establishment request message to SMF.

S5031: SMF sends a session establishment response message to AMF, and AMF receives the session establishment response message sent by SMF.

S5032: The AMF sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the AMF.

S504: The SMF sends an acquisition request to the UDM, and the UDM receives the acquisition request sent by the SMF. The above acquisition request is used to acquire user subscription information corresponding to the terminal device.

S505: UDM sends the above user subscription information to SMF, and SMF receives the user subscription information sent by UDM.

It can be understood that SMF obtains user subscription information, which is used to determine the QoS information of the session.

An embodiment of the present invention provides a session management method. 8 is a schematic flowchart of a session management method provided by an embodiment of the present invention. As shown in FIG. 8, the session management method provided by the embodiment of the present invention includes but is not limited to steps S506 to S508. The possible implementation of the method embodiment is further described below.

S506: The terminal device sends a session establishment request message to the network device, and the network device receives the session establishment request message sent by the terminal device. The session establishment request message is used to request session establishment, and the session establishment request message does not carry the QoS capabilities supported by the terminal device.

Optionally, the aforementioned preset number of QoS is pre-defined by the terminal device and the operator. The number of QoS pre-defined by terminal equipment and operators can ensure the business development of most users in the future.

Optionally, the preset number of QoS is the QoS capability supported by the network device.

Optionally, the preset QoS quantity is the QoS quantity in the user subscription information of the terminal device.

Optionally, the preset QoS quantity is the minimum value of the QoS capabilities supported by the network device and the QoS quantity in the user subscription information.

Optionally, the aforementioned preset number of QoS is pre-defined by the terminal device and the operator. When the QoS capability supported by the terminal device itself is greater than the preset number of QoS, the session establishment request message carries the QoS capability supported by the terminal device. When the QoS capability supported by the terminal device itself is less than or equal to the preset number of QoS, the session establishment request message does not carry the QoS capability supported by the terminal device.

S507: The network device generates a session establishment response message, and the session establishment response message carries QoS information of the session. The QoS information of the session is determined by the network device according to a preset number of QoS.

Optionally, if the above-mentioned preset number of QoS is predefined by the terminal device and the operator, the network device determines the QoS information of the session according to the preset number of QoS, including: the network device according to the QoS capabilities supported by the network device, the terminal device The minimum value of the number of QoS in the corresponding user subscription information and the preset number of QoS determines the QoS information of the session, and the number of QoS information of the session is less than or equal to the minimum value.

Optionally, if the above-mentioned preset number of QoS is pre-defined by the terminal device and the operator, and the QoS capability supported by the terminal device includes the maximum number of QoS flows supported by the terminal device, the preset QoS number includes the preset QoS flow Number, the network device determines the number of QoS flows in the QoS information of the session according to the preset number of QoS, including: the maximum number of QoS flows supported by the network device according to the network device, the number of QoS in the user subscription information corresponding to the terminal device The minimum value among the preset number of QoS flows determines the number of QoS flows in the QoS information of the session, and the number of QoS flows in the QoS information of the session is less than or equal to the minimum value.

Optionally, if the preset number of QoS is defined in advance by the terminal device and the operator, and the QoS capabilities supported by the terminal device include the maximum number of QoS rules supported by the terminal device, the preset number of QoS includes the preset QoS rules Number, the network device determines the number of QoS rules in the QoS information of the session according to the preset number of QoS, including: the maximum number of QoS rules supported by the network device according to the network device, the number of QoS in the user subscription information corresponding to the terminal device The minimum value among the number of preset QoS rules determines the number of QoS rules in the QoS information of the session, and the number of QoS rules in the QoS information of the session is less than or equal to the minimum value.

Optionally, if the above-mentioned preset number of QoS is pre-defined by the terminal device and the operator, and the QoS capability supported by the terminal device includes the maximum number of packet filters supported by the terminal device, the preset QoS number includes the preset packet The number of filters, the network device determines the number of packet filters in the QoS information of the session according to the preset number of QoS, including: the maximum number of packet filters supported by the network device according to the network device, user subscription information corresponding to the terminal device The minimum value among the number of QoSs in the preset number of packet filters determines the number of QoS rules in the QoS information of the session, and the number of packet filters in the QoS information of the session is less than or equal to the minimum value.

Optionally, if the preset number of QoS is the QoS capabilities supported by the network device, the network device determines the QoS information of the session according to the QoS capabilities supported by the network device, and the QoS information of the session is less than or equal to the QoS capabilities supported by the network device.

Optionally, if the preset number of QoS is the QoS capability supported by the network device, and the preset number of QoS includes the preset number of QoS flows, the network device determines the session according to the maximum number of QoS flows supported by the network device The number of QoS flows in the QoS information of the session, the number of QoS flows in the QoS information of the above session is less than or equal to the maximum number of QoS flows supported by the network device.

Optionally, if the preset number of QoS is the QoS capabilities supported by the network device, and the preset number of QoS includes the number of preset QoS rules, the network device determines the session according to the maximum number of QoS rules supported by the network device The number of QoS rules in the QoS information of the above, the number of QoS rules in the QoS information of the above session is less than or equal to the maximum number of QoS rules supported by the network device.

Optionally, if the preset number of QoS is the QoS capabilities supported by the network device, and the preset number of QoS includes the preset number of packet filters, the network device is determined according to the maximum number of packet filters supported by the network device The number of packet filters in the QoS information of the session, and the number of packet filters in the QoS information of the session are less than or equal to the maximum number of packet filters supported by the network device.

Optionally, if the preset QoS quantity is the QoS quantity in the user subscription information corresponding to the terminal device, the network device determines the QoS information of the session according to the QoS quantity in the user subscription information, and the QoS information of the session is less than or equal to the above The number of QoS in user subscription information.

Optionally, if the preset number of QoS is the number of QoS in the user subscription information corresponding to the terminal device, and the number of QoS in the user subscription information includes the number of subscribed QoS flows, then the network device according to the number of subscribed QoS flows Determine the number of QoS flows in the QoS information of the session. The number of QoS flows in the QoS information of the session is less than or equal to the number of subscribed QoS flows.

Optionally, if the preset number of QoS is the number of QoS in the user subscription information corresponding to the terminal device, and the number of QoS in the user subscription information includes the number of subscribed QoS rules, then the network device according to the number of subscribed QoS rules Determine the number of QoS rules in the QoS information of the session. The number of QoS rules in the QoS information of the session is less than or equal to the number of subscribed QoS rules.

Optionally, if the preset QoS quantity is the QoS quantity in the user subscription information corresponding to the terminal device, and the QoS quantity in the user subscription information includes the number of subscribed packet filters, then the network device according to the subscribed packet filters The number of determines the number of packet filters in the QoS information of the session. The number of packet filters in the QoS information of the above session is less than or equal to the number of subscribed packet filters.

Optionally, if the preset number of QoS is the minimum value between the QoS capability supported by the network device and the number of QoS in the user subscription information, the network device determines the QoS information of the session according to the minimum value, and the QoS of the session The information is less than or equal to the above minimum value.

S508: The network device sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the network device.

Optionally, if the above-mentioned preset number of QoS is pre-defined by the terminal device and the operator, this embodiment of the present invention may be combined with S501-S503 in the first implementation mode as another session management method.

An embodiment of the present invention also provides a session management method. 6 is a schematic flowchart of a session management method provided by an embodiment of the present invention. As shown in FIG. 6, the session management method provided by the embodiment of the present invention includes but is not limited to steps S601 to S606. The possible implementation of the method embodiment is further described below.

S601: The terminal device sends a session establishment request message to the network device, and the network device receives the session establishment request message sent by the terminal device. The session establishment request message is used to request the establishment of a session.

S602: The network device generates a session establishment response message, and the session establishment response message carries the QoS information of the session. When the session establishment request message carries the QoS capability supported by the terminal device, the QoS information of the session is the QoS supported by the network device according to the terminal device The capability is determined. When the session establishment request message does not carry the QoS capability supported by the terminal device, the QoS information of the session is determined by the network device according to the preset number of QoS.

S603: The network device sends a session establishment response message to the terminal device, and the terminal device receives the session establishment response message sent by the network device.

For specific implementations of S601-S603, refer to the optional embodiments of S501-S503 and S506-S508, which will not be repeated here.

S604: When the QoS information of the session exceeds the QoS capability supported by the terminal device, the terminal device retains part of the QoS information in the QoS information of the session according to the QoS support capability of the terminal device.

It can be understood that if the session establishment request message does not carry the QoS capability supported by the terminal device, the QoS information of the session is determined by the network device according to the preset number of QoS. If the QoS capability supported by the terminal device is less than the preset preset number, the QoS information of the session may exceed the QoS capability supported by the terminal device.

S605: The terminal device sends a session modification request message to the network device, and the network device receives the session modification request message sent by the terminal device. The session modification request message includes first indication information, and the first indication information is used to indicate the QoS information of the terminal device in the session Part of the QoS information that is not reserved.

For specific implementations of S604-S605, refer to the optional embodiments of S403-S404, which will not be repeated here.

S606: The network device releases part of the QoS information in the QoS information of the session according to the first instruction information.

In the embodiment of the present invention, the session establishment response message carries the QoS information of the session. If the session establishment request message carries the QoS capability supported by the terminal device, the QoS information of the session is determined by the network device according to the QoS capability supported by the terminal device. If the session establishment request message does not carry the QoS capabilities supported by the terminal device, the QoS information of the session is determined by the network device according to the preset number of QoS. The terminal device receives the session establishment response message sent by the network device. If the QoS information of the session exceeds the QoS capability supported by the terminal device, the terminal device retains part of the QoS information in the QoS information of the session according to the QoS support capability of the terminal device, and sends The network device sends a session modification request message, and in the session modification request message, instructs the terminal device to retain some QoS information in the QoS information of the session. The embodiment of the present invention solves the problem that the terminal device cannot support the QoS information delivered by the network device due to the insufficient QoS capability of the terminal device during the session establishment process, and realizes the differentiated processing of terminal devices with different QoS requirements, which can be used for high QoS requirements The terminal equipment is configured with more QoS resources.

For different system switching scenarios, the present invention provides a session management method, which may include:

The terminal device switches from the first communication system to the second communication system. If the QoS information of the session established by the terminal device in the first communication system exceeds the preset QoS quantity of the second communication system, the terminal device retains part of the QoS information in the QoS information of the session according to the preset QoS quantity. The terminal device sends a session modification request message to the network device of the second communication system. The network device receives the session modification request message sent by the terminal device. The session modification request message carries the fourth indication information and the QoS capabilities supported by the terminal device. The fourth indication The information is used to indicate that the terminal device does not retain some QoS information in the QoS information of the session, and the QoS capability supported by the terminal device is used to inform the network device of the maximum number of QoS information supported by the terminal device. The network device releases part of the QoS information in the QoS information of the session according to the fourth instruction information. The above network device sends a session modification response message to the terminal device, and the terminal device receives the session modification response message sent by the network device.

It can be understood that the QoS capability supported by the terminal device is used to inform the above-mentioned network device of the maximum amount of QoS information supported by the terminal device, so as to ensure that in the subsequent session modification process, the QoS information delivered by the network device will not exceed the QoS capability supported by the device .

Referring to FIG. 10, FIG. 10 shows a schematic structural diagram of another terminal device according to an embodiment of the present invention. As shown in FIG. 10, the terminal device 700 may include: a first sending unit 701, a reservation unit 702, and a first receiving unit 703. among them:

The first sending unit 701 is configured to send a session establishment request message to the network device, and the session establishment request message is used to request establishment of a session.

The first receiving unit 703 is configured to receive a session establishment response message sent by a network device, and the session establishment response message carries session QoS information.

The reservation unit 702 is configured to reserve part of the QoS information in the QoS information of the session according to the QoS capability supported by the terminal device when the QoS information of the session exceeds the QoS capability supported by the terminal device.

The first sending unit 701 is further configured to send a session modification request message to the network device. The session modification request message includes first indication information, and the first indication information is used to indicate a part of QoS information that the processor does not retain in the QoS information of the session .

Optionally, the reservation unit 702 retains part of the QoS information in the QoS information of the session, including one or a combination of: retaining the default Qos rule and the Qos flow corresponding to the default Qos rule in the QoS information of the session; preferentially retaining the above The Qos flow with guaranteed bit rate, the Qos rule with guaranteed bit rate and/or the packet filter included with the Qos rule with guaranteed bit rate in the QoS information of the session; the Qos flow with a higher priority in the QoS information of the above session is preferentially retained, The packet filter included in the Qos rule with high priority and/or the Qos rule with high priority.

Optionally, the second indication information is #26 insufficient resources.

Optionally, the QoS capabilities supported by the terminal device include one or a combination of the following: the maximum number of QoS flows supported by the terminal device; the maximum number of QoS rules supported by the terminal device; the packet filter in the QoS rules supported by the terminal device maximum quantity.

Optionally, it is characterized in that the QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, each of the one or more QoS rules contains one or more Packet filters.

Optionally, the network device is an SMF, and the above-mentioned first sending unit 701 sends a session establishment request message to the network device, including: the first sending unit 701 sends a session establishment request message to the SMF through the AMF.

Optionally, the network device is an SMF, and the above-mentioned first receiving unit 703 receives the session establishment response message sent by the network device, including: the first receiving unit 703 receives the session establishment response message sent by the SMF through the AMF.

Optionally, the network device is an SMF, and the above-mentioned first sending unit 701 sends a session modification request message to the network device, including: the first sending unit 701 sends a session establishment request message to the SMF through the AMF.

Referring to FIG. 11, FIG. 11 shows a schematic structural diagram of another terminal device according to an embodiment of the present invention. As shown in FIG. 10, the terminal device 800 may include: a second sending unit 801 and a second receiving unit 802.

The second sending unit 801 is used to send a session establishment request message to the network device. The session establishment request message is used to request session establishment, and the session establishment request message does not carry the QoS capabilities supported by the terminal; the second receiving unit 802 is used to receive the network The session establishment response message sent by the device carries the session QoS information. The session QoS information is determined by the network device according to a preset number of QoS.

Or, the second sending unit 801 is used to send a session establishment request message to the network device, the session establishment request message is used to request the establishment of a session, and the session establishment request message carries the QoS capabilities supported by the terminal; the second receiving unit 802 is used to receive The session establishment response message sent by the network device. The session establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

Optionally, when the QoS capability supported by the terminal device is greater than the preset QoS quantity, the session establishment request message carries the QoS capability supported by the terminal. When the QoS capability supported by the terminal device itself is less than or equal to the preset QoS quantity, the session The establishment request message does not carry the QoS capabilities supported by the terminal.

Optionally, the QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device, including: If the QoS capability supported by the terminal device is less than or equal to the QoS capabilities supported by the network device, the QoS information of the session is based on the network device The minimum value of the QoS capability supported by the network device, the user subscription information corresponding to the terminal device and the QoS capability supported by the terminal device is determined; if the QoS capability supported by the terminal is greater than the QoS capability supported by the network device, the QoS information of the above session is the network The device is determined according to the preset number of QoS, the user subscription information corresponding to the terminal device, and the minimum value of the QoS capabilities supported by the terminal device.

Optionally, the QoS information of the session is determined by the network device according to a preset number of QoS, including: The QoS information of the session is based on the QoS capability supported by the network device, the user subscription information corresponding to the terminal device, and the preset The minimum value of the number of QoS is determined.

Optionally, the above QoS information includes one or a combination of the following: one or more QoS flows; one or more QoS rules, each of the one or more QoS rules includes one or more packet filters .

Optionally, the network device is SMF, and the second sending unit 801 sends the session establishment request message to the network device, including: the second sending unit 801 sends the session establishment request message to the SMF through the AMF.

Optionally, the network device is SMF, and the second receiving unit 802 receives the session establishment response message sent by the network device, including: the second receiving unit 802 receives the session establishment response message sent by the SMF through AMF.

Optionally, the network device is SMF, and the QoS information of the session is determined by the SMF according to the QoS capabilities supported by the terminal device and the user subscription information corresponding to the terminal device. The user subscription information is obtained by SMF through UDM.

Referring to FIG. 12, FIG. 12 shows a schematic structural diagram of another terminal device according to an embodiment of the present invention. As shown in FIG. 12, the terminal device 900 may include: a third receiving unit 901 and a third sending unit 902.

The third receiving unit 901 is used to receive the session establishment request message sent by the terminal device. The session establishment request message is used to request the session establishment. The session establishment request message does not carry the QoS capability supported by the terminal; the third sending unit 902 is used to send The terminal device sends a session establishment response message, and the session establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to a preset number of QoS;

Or, the third receiving unit 901 is used to receive a session establishment request message sent by the terminal device, the session establishment request message is used to request establishment of a session, and the session establishment request message carries the QoS capabilities supported by the terminal; the third sending unit 902 is used to Send a session establishment response message to the terminal device. The session establishment response message carries the QoS information of the session. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal.

Optionally, the network device is SMF, and the third receiving unit 901 receives the session establishment request message sent by the terminal device, including: the third receiving unit 901 receives the session establishment request message sent by SMF through AMF.

Optionally, the network device is SMF, and the third sending unit 902 sends the session establishment response message to the terminal device, including: the third sending unit 902 sends the session establishment response message to the terminal device through the AMF.

Optionally, the network device is SMF, and the SMF further includes an acquisition unit. The QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device and the user subscription information corresponding to the terminal device. The user subscription information is obtained by the acquisition unit through UDM Acquired.

Referring to FIG. 13, FIG. 13 shows a schematic structural diagram of a communication chip provided by the present invention. As shown in FIG. 13, the communication chip 1000 may include a processor 1001 and one or more interfaces 1002 coupled to the processor 1001. among them:

The processor 1001 may be used to read and execute computer-readable instructions. In a specific implementation, the processor 1001 may mainly include a controller, an arithmetic unit, and a register. Among them, the controller is mainly responsible for instruction decoding and issues control signals for the operations corresponding to the instructions. The arithmetic unit is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logical operations, and can also perform address operations and conversions. The register is mainly responsible for saving the register operand and intermediate operation result temporarily stored during the execution of the instruction. In a specific implementation, the hardware architecture of the processor 1001 may be an application-specific integrated circuit (application specific integrated circuits, ASIC) architecture, a MIPS architecture, an ARM architecture, an NP architecture, or the like. The processor 1001 may be single-core or multi-core.

The interface 1002 can be used to input data to be processed to the processor 1001, and can output the processing result of the processor 1001 to the outside. In a specific implementation, the interface 1002 may be a general input/output (GPIO) interface, which may be connected to multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (radio frequency, RF) module, etc.) connection. The interface 1002 is connected to the processor 1001 through a bus 1003.

In the present invention, the processor 1001 may be used to call a program for implementing the session management method provided by one or more embodiments of the present invention on the communication device side from the memory, and execute the instructions contained in the program. The interface 1002 may be used to output the execution result of the processor 1001. In the present invention, the interface 1002 may be specifically used to output the resource allocation result of the processor 1001. For the session management method provided by one or more embodiments of the present invention, reference may be made to the foregoing embodiments, and details are not described herein again.

It should be noted that the corresponding functions of the processor 1001 and the interface 1002 can be implemented by hardware design, software design, or a combination of software and hardware, which is not limited herein.

The steps of the method or algorithm described in conjunction with the disclosure of the embodiments of the present invention may be implemented by hardware, or by a processor executing software instructions. Software instructions can be composed of corresponding software modules, which can be stored in RAM, flash memory, ROM, erasable programmable read only memory (erasable programmable rom, EPROM), electrically erasable programmable read only memory (electrically eraprom, EEPROM), registers, hard drives, removable hard drives, read-only compact discs (CD-ROM), or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in a transceiver or a relay device. Of course, the processor and the storage medium may also exist as discrete components in the radio access network device or terminal device.

Those skilled in the art should be aware that in the above one or more examples, the functions described in the embodiments of the present invention may be implemented by hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media and communication media, where communication media includes any medium that facilitates transfer of a computer program from one place to another. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

The above specific embodiments further describe the objectives, technical solutions, and beneficial effects of the embodiments of the present invention in detail. It should be understood that the above are only specific implementations of the embodiments of the present invention, and are not intended to limit the implementation of the present invention. The protection scope of the examples shall be included in the protection scope of the embodiments of the present invention on the basis of the technical solutions of the embodiments of the present invention, and any modifications, equivalent replacements, improvements, etc. made.

Claims

A terminal device, comprising: a processor, a memory, and a transceiver; the transceiver is used to communicate with other communication devices; the memory is used to store program codes and data; and the processor is used to call the memory The program code in performs the following operations:

Sending a session establishment request message to the network device through the transceiver, where the session establishment request message is used to request the establishment of a session;

Receiving, by the transceiver, a session establishment response message sent by the network device, where the session establishment response message carries the quality of service QoS information of the session;

When the QoS information of the session exceeds the QoS capabilities supported by the terminal device, retain part of the QoS information in the QoS information of the session according to the QoS capabilities supported by the terminal device;

Sending a session modification request message to the network device through the transceiver, where the session modification request message includes first indication information, and the first indication information is used to indicate that the processor does not include in the QoS information of the session Some reserved QoS information.
The terminal device according to claim 1, wherein part of the QoS information in the QoS information for retaining the session includes one or a combination of the following:

Retaining the default Qos rule in the QoS information of the session and the Qos flow corresponding to the default Qos rule;

Preferentially retaining the Qos flow of the guaranteed bit rate, the Qos rule of the guaranteed bit rate and/or the packet filter included in the Qos rule of the guaranteed bit rate in the QoS information of the session;

A packet filter included in the Qos flow with high priority, the Qos rule with high priority, and/or the Qos rule with high priority is preferentially reserved in the QoS information of the session.
The terminal device according to claim 1 or 2, wherein the session modification request message further includes second indication information, and the second indication information is used to indicate that the terminal device has insufficient Qos capability.
The terminal device according to any one of claims 1 to 3, wherein the QoS capabilities supported by the terminal device include one or a combination of the following:

The maximum number of QoS flows supported by the terminal device;

The maximum number of QoS rules supported by the terminal device;

The maximum number of packet filters in the QoS rules supported by the terminal device.
The terminal device according to any one of claims 1 to 4, wherein the QoS information includes one or a combination of the following:

One or more of the QoS flows;

One or more of the QoS rules, and each of the one or more of the QoS rules includes one or more of the packet filters.
A session management system, characterized in that the system includes: terminal equipment and network equipment;

The terminal device is configured to send a session establishment request message to the network device, and the session establishment request message is used to request the establishment of a session;

The network device is configured to send a session establishment response message to the terminal device, where the session establishment response message carries the quality of service QoS information of the session;

The terminal device is configured to retain part of the QoS information in the QoS information of the session according to the QoS capabilities supported by the terminal device when the QoS information of the session exceeds the QoS capabilities supported by the terminal device;

The terminal device is configured to send a session modification request message to the network device, the session modification request message includes first indication information, and the first indication information is used to indicate that the terminal device is in the QoS information of the session Some unreserved QoS information;

The network device is configured to release part of the QoS information in the QoS information of the session according to the first indication information.
The system according to claim 6, wherein the part of the QoS information in the QoS information for retaining the session includes one or a combination of the following:

Retaining the default Qos rule in the QoS information of the session and the Qos flow corresponding to the default Qos rule;

Preferentially retaining the Qos flow of the guaranteed bit rate, the Qos rule of the guaranteed bit rate and/or the packet filter included in the Qos rule of the guaranteed bit rate in the QoS information of the session;

A packet filter included in the Qos flow with high priority, the Qos rule with high priority, and/or the Qos rule with high priority is preferentially reserved in the QoS information of the session.
The system according to claim 6 or 7, wherein the session modification request message further includes second indication information, and the second indication information is used to indicate that the terminal device has insufficient Qos capability.
The system according to any one of claims 6 to 8, wherein the QoS capabilities supported by the terminal device include one or a combination of the following:

The maximum number of QoS flows supported by the terminal device;

The maximum number of QoS rules supported by the terminal device;

The maximum number of packet filters in the QoS rules supported by the terminal device.
The system according to any one of claims 6 to 9, wherein the QoS information includes one or a combination of the following:

One or more of the QoS flows;

One or more of the QoS rules, and each of the one or more of the QoS rules includes one or more of the packet filters.
A session management system, characterized in that the system includes: terminal equipment and network equipment;

The terminal device is configured to send a session establishment request message to the network device, the session establishment request message is used to request to establish a session, and the session establishment request message does not carry the quality of service QoS capabilities supported by the terminal;

The network device is configured to send a session establishment response message to the terminal device, the session establishment response message carries QoS information of the session, and the QoS information of the session is determined by the network device according to a preset number of QoS of;

or,

The terminal device is configured to send a session establishment request message to the network device, the session establishment request message is used to request to establish a session, and the session establishment request message carries a QoS capability supported by the terminal;

The network device is configured to send a session establishment response message to the terminal device, where the session establishment response message carries QoS information of the session, and the QoS information of the session is the QoS supported by the network device according to the terminal Ability to determine.
The system according to claim 11, wherein when the QoS capability supported by the terminal device itself is greater than the preset QoS number, the session establishment request message carries the QoS capability supported by the terminal when When the QoS capability supported by the terminal device itself is less than or equal to the preset QoS number, the session establishment request message does not carry the QoS capability supported by the terminal.
The system according to claim 11 or 12, wherein the QoS information of the session is determined by the network device according to the QoS capabilities supported by the terminal device, including:

If the QoS capability supported by the terminal device is less than or equal to the QoS capability supported by the network device, the QoS information of the session is that the network device subscribes to the user corresponding to the terminal device according to the QoS capability supported by the network device The minimum value of the information and the QoS capability supported by the terminal device is determined;

If the QoS capability supported by the terminal is greater than the QoS capability supported by the network device, the QoS information of the session is the network device according to the preset number of QoS, the user subscription information corresponding to the terminal device and the The minimum value of the QoS capabilities supported by the terminal equipment is determined.
The system according to any one of claims 11 to 13, wherein the QoS information of the session is determined by the network device according to a preset number of QoS, including:

The QoS information of the session is determined by the network device according to the minimum value among the QoS capabilities supported by the network device, the user subscription information corresponding to the terminal device, and the preset number of QoS.
The system according to any one of claims 11 to 14, wherein the QoS capabilities supported by the terminal device carried in the session establishment request message include one or a combination of the following:

The maximum number of QoS flows supported by the terminal device;

The maximum number of QoS rules supported by the terminal device;

The maximum number of packet filters in the QoS rules supported by the terminal device.
The system according to any one of claims 11 to 15, wherein the QoS information includes one or a combination of the following:

One or more of the QoS flows;

One or more of the QoS rules, and each of the one or more of the QoS rules includes one or more of the packet filters.
The system according to any one of claims 11 to 16, wherein the preset number of QoS includes one or a combination of the following parameters:

The preset number of the QoS flows;

The preset number of the QoS rules;

The preset number of the packet filters.
The system according to any one of claims 11 to 17, wherein the network device is a session management function SMF device, the system further includes an access and mobility management function AMF device, and the terminal device is configured as Sending a session establishment request message to the network device, including:

The terminal device is configured to send the session establishment request message to the AMF;

The AMF is configured to send the session establishment request message to the SMF.
The system according to any one of claims 11 to 18, wherein the network device is the SMF, the system further includes the AMF, and the network device is configured to send session establishment to the terminal device Response message, including:

The SMF is configured to send the session establishment response message to the AMF;

The AMF is configured to send the session establishment response message to the terminal device.
The system according to any one of claims 11 to 19, wherein the network device is the SMF, and the system further includes a unified data management UDM device, wherein,

The SMF is configured to send an acquisition request to the UDM, where the acquisition request is used to acquire user subscription information corresponding to the terminal device;

The UDM is configured to send the user subscription information to the SMF.