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Method for caching data and session management function entity

A functional entity and session management technology, applied in network data management, connection management, wireless network protocol, etc., can solve problems affecting user experience, video service freeze, downlink data disorder, etc.

Pending Publication Date: 2018-11-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In this way, the downlink data received by the terminal device may be out of order due to two different data transmission paths
If the downlink data received by the terminal device is out of order, the terminal device needs to suspend processing and adjust the received downlink data first, which seriously affects the user experience (for example, video services will cause freezes)

Method used

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  • Method for caching data and session management function entity
  • Method for caching data and session management function entity
  • Method for caching data and session management function entity

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0043] The embodiment of this application is based on figure 2 A solution is presented in the communication system shown, which is applicable to implement data caching in the architecture of next-generation mobile networks, such as 5G networks. For example, in the 5G mobile network architecture, the control plane function of the mobile gateway is decoupled from the forwarding plane function. Merged into a unified control plane entity. The user plane UPF entity can implement the user plane functions (SGW-U and PGW-U) of a serving gateway (serving gateway, SGW) and a packet data network gateway (packet data network gateway, PGW). Further, the unified control plane entity can be decomposed into an access and mobility management function (access and mobility management functi...

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Abstract

The invention relates to the technical field of wireless communications, and provides a method for caching data. The method comprises the steps of enabling a session management function entity to respectively interact with a second UPF (User Plane Function) entity and a first UPF entity, so that the first UPF entity sends first downlink data of a first session to an access network device via the second UPF entity, wherein the first UPF entity is an anchor point of the first session; and enabling the session management function entity to notify, according to a preset condition, the first UPF entity of caching second downlink data of the first session, wherein the second downlink data are received after the first session is converted to a deactivated state. Through the solutions provided bythe embodiments, an out-of-order problem of downlink data received by a terminal can be prevented; besides, without establishing an additional forwarding tunnel and without releasing a forwarding tunnel again, cached downlink data can be obtained, and thus signaling interaction between the UDP entities is reduced; and therefore, a time delay is reduced, and the user experience is improved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method for caching data and a session management functional entity. Background technique [0002] In the fourth generation (the 4 th generation, 4G) communication system, a packet data network gateway (packet data network gateway, PGW) can be used as an anchor point to ensure the continuity of the Internet Protocol (IP). Such as figure 1 As shown, at time T1, the terminal device obtains downlink data from the data network through a serving gateway (serving gateway, SGW) SGW1 and PGW, so as to realize the transmission of service data. If the terminal device enters the idle state from SGW1, the downlink data is cached in SGW1. At T2, after the terminal device switches to the connected state, if the terminal device moves out of the service range of SGW1 and selects SGW2, SGW2 needs to establish a forwarding tunnel with SGW1 to obtain the downlink data ...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04W8/08
CPCH04L67/141H04W8/08H04L67/568H04W36/0011H04L67/143H04L67/148H04W36/02H04W76/12H04W76/34H04W8/12H04W48/16H04W80/10
Inventor 唐廷芳李岩倪慧
Owner HUAWEI TECH CO LTD
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