爱卫生 发表于 2014-2-17 19:47
比较奇怪,规范前面的架构图里没有画SGW和Gn-SGSN的接口。如下:
401里有这么一段话:
When data forwardingis used as part of mobility procedures different user plane routes may be usedbased on the network configuration (e.g. direct orindirect data forwarding). These routes can be between eNodeB and RNC, eNodeBand SGSN, RNC and S‑GW or between S‑GW and SGSN. Explicit reference points are not defined for theseroutes. These user plane forwarding routes can cross inter-PLMN boundaries (e.g. in the case ofInter-PLMN HO).
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