2G/GSM

 

 

 

 

T3210/T3211

 

T3210 and T3211 is timer that is related to Location Updating process. The function of these timers are defined in 24.008 as follows.

 

< Table 11.1/3GPP TS 24.008: Mobility management timers - MS-side >

 

If I represent into sequence diagram, it can be as follows.

 

Example 1 >

 

Step

Direction

Message

Comment

1

UE -> NW

Channel Request/Handover Access

 

2

UE <- NW

Immediate Assignment

 

3

UE -> NW

Location Updating Request

T3210 Start on UE

4

UE <- NW

Identity Request

 

5

UE -> NW

Identity Response

 

6

NW

< Do not send Location Updating >

 

7

UE

 

20 sec elapsed since step 3

8

UE

 

T3210 expire/T3211 Start

9

UE

 

15 sec elapsed since step 8

10

 

 

T3211 Exipires

11

UE -> NW

Channel Request/Handover Access

 

12

UE <-> NW

< Normal Location Updating >