Method used for discovering and selecting access network for user equipment in heterogeneous network

Abstract

The invention provides a method used for discovering and selecting an access network for user equipment in a heterogeneous network. In the method, the user equipment sends a request message to an ANDSF, the request information at least including an identifier of a cellular network cell that user equipment lately passes and staying time in the cellular network cell that the user equipment passes lately. The ANDSF determines the movement speed type of the user equipment at least according to the identifier of the cellular network cell that the user equipment lately passes and the staying time in the cellular network cell that the user equipment lately passes; and sets an intersystem mobile strategy, access network discovery information and intersystem routing strategy for the user equipment at least according to the movement speed type. Thus reliable estimation of the movement speed of the user equipment is realized in a heterogeneous network including various types of access networks, and the ANDSF can accurately set the intersystem mobile strategy, the access network discovery information and the intersystem routing strategy for the user equipment based on the reliable movement speed, thereby reducing frequent inter-RAT switching and switching failures, and providing better user experience.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method for discovering and selecting an access network for a user equipment in a heterogeneous network. Background technique [0002] In order to meet the ever-increasing network communication traffic, mobile operators rely more and more on WLAN technology. At the same time, mobile operators have also deployed some low-power cells, such as micro cells (Pico cells) and pico cells (Femto cells), to satisfy network communication traffic. Therefore, in the current heterogeneous network, various access networks (such as macro cells, micro cells, pico cells, WLAN networks and even WiMax networks) coexist with each other, such as figure 1 as shown ( figure 1 The heterogeneous network in includes macro cell, micro cell and WLAN network). [0003] However, these different access networks have different coverage and access capabilities, which makes the function of discovering...

AI Technical Summary

Problems solved by technology

[0007] On the other hand, the existing method of using GPS to estimate the moving speed of the user equipment will cause the GPS receiver to consume too much energy, and its use range is also quite limited, for example, it cannot be used indoors

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