Switching control method for wireless AN and AN

Abstract

The invention discloses a switching control method for a wireless AN (Access Network), which comprises the following steps: a source side AN firstly performs soft handover to an AT (Access Terminal) after receiving a switching request from the AT and judging that the switching request meets the soft handover requirement, and then the source side AN judges whether the AT after receiving the soft handover meet the hard handover requirement or not according to the position of the AT or a service provided by a target side AN, the hard handover is started if the AT meets the hard handover requirement, and the conversation control power of the AT is completely transferred to a target side AN. By integrating the advantages of the soft handover and the hard handover between the ANs to prevent the frequent switching of the AT between the ANs, so that the flow burden of interfaces between the ANs is lightened, the empty quality of the AT on the AN interface is improved, and the DCR (Dropped Call Rate) is reduced.

Description

Technical field [0001] The invention relates to a switching control method of a wireless access network and an access network. Background technique [0002] In the current CDMA 1X EV-DO air interface version 3GPP2C.S0024-B and A interface protocol version 3GPP2A.S0008-C_v2.0, A.S0009-C_v2.0, soft handover between access networks (AN) is defined And the standardized process and method of hard handover. The access network includes base stations and base station controllers. For the method of soft handover and hard handover between ANs, a Make-Before-Break (MBB) type handover procedure is proposed. [0003] For the MBB handover process, it requires both the access terminal (AT) and AN to have the ability to support multi-application layer protocol routing, that is, to support the Enhanced Multi-flow Packet Application version (3GPP2: C.S0063-A) v1.0), when the access terminal performs handover, it not only maintains the connection with the source side AN, but also establishes the c...

AI Technical Summary

Problems solved by technology

However, the access terminal may stay on the boundary between ANs. If the signal strength of the two ANs changes drastically, the access terminal will switch back and forth between the two ANs, resulting in frequent transfer of session control rights, resulting in the so-called "ping-pong effect".

In this way, the advantages of soft handover between ANs are not fully utilized. On the one hand, it increases the burden on the switching system, and on the other hand, it also increases the possibility of dropped calls.

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