Keeping the UE awake
摘要
說明書
In an example in which the UE is in PSM mode, the MME may prevent the UE from using the PSM mode until the desired time window has passed. Further, in accordance with an example, the MME may prevent given UE or group of UEs from entering a power savings mode (PSM) or extended idle mode discontinuous reception (eDRX) until a time window in the data delivery request message has passed. Preventing the UE from entering the PSM or eDRX can include rejecting a timer value that is proposed by the UE during a tracking area update. In another example, preventing the UE from entering the PSM or eDRX can include adjusting a timer associated with the UE, and adjusting a tracking area update timer associated with UE, such that the at least one UE is awake when the data transfer is performed. The MME may reject a UE's proposed active-timer value during a TAU. The MME may provide the UE with an indication that PSM is not allowed by rejecting the active timer or by providing a longer active-timer than what the UE proposed, for example, in order to ensure that the UE is not in PSM during the delivery attempt. In some cases, the MME 804 may also provide an indication to the UE that data is buffered for the UE at the third party server 810 or provide an indication to the UE that a data transfer, broadcast, or trigger is pending. Alternatively, the MME 804 may adjust the UE's active timer and TAU timer so that the UE will be awake when the data transfer is to be performed.
In some cases, in which the SCEF 808 provided an External Group ID, the message at 3 may include multiple IMSIs. Further, the message at 3 may be sent multiple times to the MME for each IMSI that is in the group that the MME is serving, and the message may be sent one or more times to each MME that serves a UE in the group.
