请问SGSN和GGSN之间会传送小区信息吗？

samsin

爱楼主，是这样：
•        “The SGSN may include the User Location Information IE, MS Time Zone IE, RAT Type IE, IMEI(SV) IE and the CAMEL Charging Information Container IE if they are available (see sub-clause 15.1.1a of 3GPP TS 23.060 [4] for more information). If the User Location Information IE is included then the SGSN shall include the CGI or SAI in the 'Geographic Location' field depending on whether the MS is in a cell or a service area respectively”.

The above text does not define conditions for inclusion of the User Location Information IE. Rather, the text says that if SGSN decides to include User Location Information IE, then SGSN must include the CGI or SAI in the 'Geographic Location' field. Actually, the logic should be reverse: only in case CGI or SAI are available SGSN may include Location Information IE.

所以SGSN在 create pdp、update pdp procedure里，是有可能的，那就是 SGSN的确知道MS的ci或sac，即MS还在ready 下。