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Session establishment method and device

A technology of session establishment and session establishment request, which is applied in the field of communication to achieve the effect of reducing delay, reducing signaling interaction, and avoiding negotiation

Active Publication Date: 2019-08-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a method and device for establishing a session to solve the problem of how to trigger the establishment process of a unicast session so that the terminal switches from a broadcast path to a unicast path to receive data

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  • Session establishment method and device

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Embodiment approach

[0349] The first implementation manner of step 302: the AMF entity selects a radio access network function RAN entity according to the session establishment assistance information of the PDU session; the AMF entity sends a PDU session request message to the terminal through the RAN entity.

[0350] A second implementation manner of step 302: the AMF entity selects a RAN entity according to the identifier of the terminal; the AMF entity sends a PDU session request message to the terminal through the RAN entity.

[0351] In an example, optionally, after the AMF entity receives the session establishment assistance information of the PDU session sent by the SMF entity, since the session establishment assistance information of the PDU session contains one or more of the broadcast session identifier and the group identifier Therefore, the AMF entity selects a RAN entity according to the session establishment assistance information of the PDU session, for example, the AMF entity selec...

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Abstract

The invention provides a session establishment method and device, and the method comprises the steps that an SMF entity sends a PDU session establishment request message to a terminal, and the PDU session establishment request message is used for requesting the establishment of a PDU session; and the SMF entity receives a PDU session establishment response message from the terminal. According to the method for actively initiating the PDU session establishment process by the network side, when a terminal needs to be switched from a broadcast path to a unicast path, the network side can establish the unicast path for the terminal by establishing the PDU session; t. The network side can ensure that the broadcast path and the unicast path both select the same UPF entity; w. When the broadcastsession is switched to the unicast session, the negotiation of downlink data of a user plane when the broadcast path is switched to the unicast path is avoided, the switching delay from the broadcastpath to the unicast path is reduced, and the rapid switching of the service continuity requirements of the broadcast mode and the unicast mode is met; . and moreover, sSignaling interaction can be reduced, so that the time delay is reduced.

Description

technical field [0001] The present application relates to communication technologies, and in particular to a method and device for establishing a session. Background technique [0002] With the continuous development of communication technology, research and standardization work on the fifth-generation mobile communication technology (5th-generation, 5G) has begun. The 5G network includes entities with logical functions of different network units, and each entity can perform different network functions; entities and terminals in the 5G network can establish a broadcast session or a unicast session between the terminal and the network. A path and a unicast path, so that the broadcast path or the unicast path is used for data exchange between the terminal and the data network. [0003] In the prior art, when the terminal receives data through the broadcast path, when the signal quality of the data received from the broadcast path is poor, it is necessary to switch the downlin...

Claims

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Application Information

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IPC IPC(8): H04W76/10H04W76/11H04W76/40H04W36/00H04W36/16H04W36/30H04W36/38H04W24/10
CPCH04W76/10H04W76/11H04W76/40H04W36/0011H04W36/0083H04W36/16H04W36/30H04W36/38H04W24/10H04W36/0007H04W36/12H04L65/1069H04L65/1016H04L65/80H04L65/611H04L12/18H04L67/141H04L67/146
Inventor 葛翠丽杨艳梅
Owner HUAWEI TECH CO LTD
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