Access network switching method, access network discovery support functions (ANDSF) entity and terminal

Abstract

The invention provides an access network switching method, an access network discovery and selection function entity and a terminal, which are used for solving the problems in the prior art that power consumption is higher and the switching time is longer when the terminal is used for carrying out access network selection and switching. The method comprises the following steps that the access network discovery support functions (ANDSF) receive an access network inquiring request when the terminal accessed into a first access network carries out access network switching and the access network inquiring request carries a mark and position information of the terminal; the ANDSF determine at least one available second access network information in the region of the terminal according to the position information of the terminal; and the ANDSF send the second access network information and a network selecting policy to the terminal so that the terminal selects a target access network from the second access network information according to the network selecting policy and is switched into the target access network.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an access network switching method, an access network discovery and selection functional entity and a terminal. Background technique [0002] In the prior art, when multiple heterogeneous networks access the mobile core network, the terminal realizes the discovery and selection of the access network mainly through the access network discovery and selection functional entity ANDSF. Wherein, the ANDSF stores the access network information pre-configured by the operator. When handover is required, the terminal sends an access network information request to ANDSF to obtain access network information in its area, and selects an access network for handover according to the access network information and the selection policy issued by ANDSF. [0003] However, in the prior art, due to reasons such as network congestion or network failure, the access network corresponding ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an access network switching method, an access network discovery and selection functional entity and a terminal, which are used to solve the problems of high power consumption and long switching time when terminals perform access network selection and switching in the prior art

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