Section: 6.1.3.8.2.2 Handling of network rejection due to SM cause #26
Content: If the SM cause value is #26 "insufficient resources" and the Back-off timer value IE is included, the MS shall ignore the Re-attempt indicator IE provided by the network, if any, and take different actions depending on the timer value received for timer T3396 in the Back-off timer value IE (if the MS is configured for dual priority, exceptions are specified in subclause 6.1.3.12): i) if the timer value indicates neither zero nor deactivated, the MS shall stop timer T3396 associated with the corresponding APN, if it is running. The MS shall then start timer T3396 with the value provided in the Back-off timer value IE and shall not send another ACTIVATE MBMS CONTEXT REQUEST message for the same APN that was sent by the MS until timer T3396 expires or timer T3396 is stopped. The MS shall not stop timer T3396 upon a PLMN change or inter-system change; ii) if the timer value indicates that this timer is deactivated, the MS shall not send another ACTIVATE MBMS CONTEXT REQUEST message for the same APN that was sent by the MS, until the MS is switched off or the SIM/USIM is removed or the MS receives REQUEST MBMS CONTEXT ACTIVATION message for the same APN from the network. The timer T3396 remains deactivated upon a PLMN change or inter-system change; and iii) if the timer value indicates that this timer is zero, the MS may send another ACTIVATE MBMS CONTEXT REQUEST message for the same APN. If the Back-off timer value IE is not included, then the MS may send another ACTIVATE MBMS CONTEXT REQUEST message for the same APN. If the MS is switched off when the timer T3396 is running, the MS shall behave as follows when the MS is switched on and the SIM/USIM in the MS remains the same: - let t1 be the time remaining for T3396 timeout at switch off and let t be the time elapsed between switch off and switch on. If t1 is greater than t, then the timer shall be restarted with the value t1 – t. If t1 is equal to or less than t, then the timer need not be restarted. If the MS is not capable of determining t, then the MS shall restart the timer with the value t1; and - if prior to switch off, timer T3396 was running because an ACTIVATE PDP CONTEXT REQUEST, ACTIVATE SECONDARY PDP CONTEXT REQUEST, MODIFY PDP CONTEXT REQUEST or ACTIVATE MBMS CONTEXT REQUEST message containing the low priority indicator set to "MS is configured for NAS signalling low priority" was rejected with timer T3396, and if timer T3396 is restarted at switch on, then the MS configured for dual priority shall handle session management requests as indicated in subclause 6.1.3.12.