请教下LTE中eps update type是如何定义的？具体的解释如何？

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

这帮矬人，就不会自己去看看协议么

24301

自己懒，上来问别人

不应该这么说吧 有的就不会查协议的

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