已解决问题
在Gn口怎么区别2G和3G的终端接入?  (进入论坛模式)
提问者:yellowsun   |  提问时间:2011-7-23 16:21
在Gn口怎么区别2G和3G的终端接入?是不是通过SAI的值判断?
关闭所有答案回应     最佳答案
CREATE_PDP_REQ中有rattype,1是3G, 2是2G
 |  回应该答案 (0)  |  回答时间:2011-7-25 16:52
其他答案 ( 4 条 )
不知道这个还
 |  回应该答案 (0)  |  回答者:li99099   |  2011-7-23 17:15
找个Gn的数据包解开看看不就知道了
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 |  回应该答案 (0)  |  回答者:neutrino0718   |  2011-7-29 16:05
rattype是可选字段,如果有3G终端,是不是网络默认打开?
 |  回应该答案 (0)  |  回答者:yellowsun   |  2011-8-1 21:59
有3G终端不代表这个终端一定要用3G网络。核心网侧只有SGSN才明确的知道这个用户现在用的是2G还是3G(Gb还是Iu)。
中国移动现网rattype是明确要求打开的,除了部分很老的SGSN还使用GTPV0外,其他SGSN都是会上报rattype的。联通情况不清楚,但是估计也会有类似要求。
从SAI来获取对应的2/3G关系,实现起来太麻烦了,主要是运营商会不会把这个数据给你。而且不知道是否规划了2/3G公用RAI的情况。另外如果你从近GGSN侧Gn采数据的话,roamer的情况你怎么处理?
综上,只有rattype最有效。
 |  回应该答案 (0)  |  回答者:hycl5410   |  2011-8-2 11:32