Patent ID: 8068808
Filing Date: 2011-11-29
Classification: G08B,H04W,Y02D

Abstract:
1. A method for providing emergency call service access to a deployable wireless network resource, comprising: provisioning a mobile device with a primary preferred roaming list (PRL) and a secondary PRL, wherein the primary PRL lists communication networks to which the mobile device is permitted full access and wherein the secondary PRL lists communication networks to which the mobile device is permitted limited emergency call access; detecting a switch-to-secondary-PRL flag included within the primary PRL while attempting to access communication networks listed in the primary PRL; switch-to-secondary-PRL flag selecting an emergency communication network from the secondary PRL upon detection of the switch-to-secondary-PRL flag; scanning a frequency listed in the secondary PRL for the selected emergency communication network; receiving a system identification number (SID) on the scanned frequency; comparing the received SID to an SID of the selected emergency communication network listed in the secondary PRL; and allowing emergency call initiation on the mobile device if the received SID matches the SID of the selected emergency communication network.