Method of Enhanced Timer Handling for SIM/USIM Change
A method of timer handing upon SIM/USIM replacement is proposed. A user equipment (UE) initiates a session management (SM) or a mobility management (MM) request with a wireless network. The UE is attached to the network using a first SIM/USIM/profile. When NAS level session management (SM) or mobility management (MM) congestion control is active, the UE receives a SM/MM reject message from the network, which contains timer information. Based on the timer information, the UE starts a timer such that corresponding SM/MM request is barred. When a user replaces the first SIM/USIM/profile with a second SIM/USIM/profile while maintains power on, the UE stops the timer accordingly. As a result, the UE is able to initiate corresponding SM/MM request with the network.
1 . A method, comprising:
receiving a reject message by a user equipment (UE) in a mobile communication network, wherein the UE is attached to the network using a first identification module;
starting a timer in response to the reject message, wherein the reject message is associated with a session management request or a mobility management request;
replacing the first identification module with a second identification module while the UE remains power on; and
determining whether to stop the timer or continue to run the timer by comparing the first and the second identification modules.
2 . The method of claim 1 , wherein the reject message is associated with a session management request, and wherein the timer is a T3396 timer.
3 . The method of claim 1 , wherein the reject message is associated with a mobility management procedure, and wherein the timer is a T3245 timer.
4 . The method of claim 1 , wherein the reject message is associated with a mobility management request in circuit switch domain, and wherein the timer is a T3246 timer.
5 . The method of claim 1 , wherein the reject message is associated with a mobility management request in packet switch domain, and wherein the timer is a T3346 timer.
6 . The method of claim 1 , wherein the UE stops the timer if the second identification module is different from the first identification module.
7 . The method of claim 1 , wherein the UE continues to run the timer if the second identification module is the same as the first identification module.
8 . The method of claim 1 , wherein the reject message comprises timer information, wherein the timer information further comprises at least one of a timer value, a residual timer value, and a timestamp.
9 . The method of claim 8 , wherein the UE records the timer information in the UE associated with the first identification module.
10 . The method of claim 8 , wherein the UE records the timer information in the first identification module.
11 . The method of claim 8 , wherein the UE checks timer information of the second identification module before performing an attach procedure with the network.
12 . A user equipment (UE), comprising:
a receiver that receives a reject message in a mobile communication network, wherein the UE is attached to the network using a first identification module;
a timer, wherein the timer is started in response to the reject message, and wherein the reject message is associated with a session management request or a mobility management request;
an identification slot, wherein the first identification module in the identification slot is replaced with a second identification module while the UE remains power on; and
a timer control circuit that determines whether to stop the timer or continue to run the timer by comparing the first identification module and the second identification module.
13 . The UE of claim 12 , wherein the reject message is associated with a session management request, and wherein the timer is a T3396 timer.
14 . The UE of claim 12 , wherein the reject message is associated with a mobility management procedure, and wherein the timer is a T3245 timer.
15 . The UE of claim 12 , wherein the reject message is associated with a mobility management request in circuit switch domain, and wherein the timer is a T3246 timer.
16 . The UE of claim 12 , wherein the reject message is associated with a mobility management request in packet switch domain, and wherein the timer is a T3346 timer.
17 . The UE of claim 12 , wherein the UE stops the timer if the second identification module is different from the first identification module.
18 . The UE of claim 12 , wherein the UE continues to run the timer if the second identification module is the same as the first identification module.
19 . The UE of claim 12 , wherein the reject message comprises timer information, wherein the timer information further comprises at least one of a timer value, a residual timer value, and a timestamp.
20 . The UE of claim 19 , wherein the UE records the timer information in the UE associated with the first identification module.
21 . The UE of claim 19 , wherein the UE records the timer information in the first identification module.
22 . The UE of claim 19 , wherein the UE checks timer information of the second identification module before performing an attach procedure with the network.