Mitigating no-service delays for LTE capable wireless devices without LTE access permission

摘要

This disclosure relates to reducing or mitigating no-service delays for LTE capable wireless devices which do not have permission to access one or more LTE networks. According to some embodiments, a MME of a first PLMN may receive an LTE NAS request corresponding to a tracking area from a wireless device. The MME may determine to reject the request, and may send a rejection response to the request indicating that access to the first PLMN in the tracking area according to LTE is not available to the wireless device. The rejection response may further include extended cause information relating to whether or not the wireless device is permitted to access the first PLMN in other tracking areas according to LTE.

主权项

1. A user equipment (UE) device, comprising:
wireless communication circuitry; a memory medium; and one or more processing elements coupled to the wireless communication circuitry and the memory medium, wherein the one or more processing elements are configured to execute program instructions stored on the memory medium to:
send, to a mobility management entity (MME) of a first public land mobile network (PLMN), a long term evolution (LTE) attach request, combined attach request, tracking area update request, or combined tracking area request by way of a cellular base station (BS);receive a rejection response to the request, wherein the rejection response comprises information comprising an evolved packet service mobility management (EMM) cause #15 specifying “no suitable cells in tracking area”, and wherein the rejection response further comprises an extended EMM cause information element (IE).