The purpose of the EPS update type information element is to specify the area the updating procedure is associated with.
具体类型如下：
TA updating
combined TA/LA updating
combined TA/LA updating with IMSI attach
periodic updating
时间: 2012-7-7 10:33
作者: focuszte
这帮矬人，就不会自己去看看协议么
24301
自己懒，上来问别人
时间: 2012-7-9 13:41
作者: flashwade
EPS update type value (octet 1, bit 1 to 3)
Bits
3 2 1
0 0 0 TA updating
0 0 1 combined TA/LA updating
0 1 0 combined TA/LA updating with IMSI attach
0 1 1 periodic updating
1 0 0 unused; shall be interpreted as "TA updating", if received by the network.
1 0 1 unused; shall be interpreted as "TA updating", if received by the network.
All other values are reserved.
"Active" flag (octet 1, bit 4)
Bit
4
0 No bearer establishment requested
1 Bearer establishment requested