物理MGW优选功能探讨

A Discussion of the MGW Optimization Function

当局间采用BICC信令时，通过在IAM信令或APM信令传递出局MGW的BCU-ID，可以让后向节点更合理的选择入局MGW，从而使主被叫落在同一物理MGW，在河北衡水本地网试验该功能，通过DT、CQT测试，结果表明MOS值提升，同时核心网交换机出、入局编解码协商次数也大幅减少。

The BCU-ID parameter can be contained in BICC signaling. The destination MSC server can derive the origin VMGW information by the received IAM or APM signaling that consists BCU-ID, and selects the same physical MGW with the origin VMGW. On this situation, the entire call procedure can be handled in the same physical MGW. The function of the MGW optimization has been test In Hengshui local network, Hebei. Through the DT＆COT testing, the results showed that the MOS value promotion and the incoming and the outgoing codec negotiation times in Core network significantly decreases.