EPS Session Management Timers – Network side

TIMER NUM.

TIMER VALUE

STATE

CAUSE OF START

NORMAL STOP

ON THE
1st, 2nd, 3rd, 4th EXPIRY (NOTE 1)

T3485
NOTE 2
NOTE 3

8s

In WB-S1/CE mode, 16s

BEARER CONTEXT ACTIVE PENDING

ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST sent

ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST sent

ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT received

or ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT received

or ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT received

or ACTIVATE DEDICATED EPS BEARER CONTEXT REJECT received

Retransmission of the same message

T3486
NOTE 2
NOTE 3

8s

In WB-S1/CE mode, 16s

BEARER CONTEXT MODIFY PENDING

MODIFY EPS BEARER CONTEXT REQUEST sent

MODIFY EPS BEARER CONTEXT ACCEPT received

or MODIFY EPS BEARER CONTEXT REJECT received

Retransmission of MODIFY EPS BEARER CONTEXT REQUEST

T3489
NOTE 2
NOTE 3

4s

In WB-S1/CE mode, 12s

PROCEDURE TRANSACTION PENDING

ESM INFORMATION REQUEST sent

ESM INFORMATION RESPONSE received

Retransmission of ESM INFORMATION REQUEST on 1st and 2nd expiry only

T3495
NOTE 2
NOTE 3

8s

In WB-S1/CE mode, 16s

BEARER CONTEXT INACTIVE PENDING

DEACTIVATE EPS BEARER CONTEXT REQUEST sent

DEACTIVATE EPS BEARER CONTEXT ACCEPT received

Retransmission of DEACTIVATE EPS BEARER CONTEXT REQUEST

NOTE 1: Typically, the procedures are aborted on the fifth expiry of the relevant timer. Exceptions are described in the corresponding procedure description.

NOTE 2: In NB-S1 mode, then the timer value shall be calculated as described in subclause 4.7.

NOTE 3: In WB-S1 mode, if the UE supports CE mode B and operates in either CE mode A or CE mode B, then the timer value is as described in this table for the case of WB-S1/CE mode (see subclause 4.8).