ENHANCING EMERGENCY CALL PROCEDURE IN GSM-W-CDMA NETWORKS TO INCORPORATE PERSONAL SECURITY
ABSTRACT
This project was undertaken with the objective of providing a rather more flexible Emergency Call Handling Procedure (ECHP) for the GSM/WCDMA network which will facilitate call termination to other sources of help (Commercial Emergency Service Operators, Vigilante groups etc.) in addition to the Public Safety Answering Point (PSAP) as a possible replacement for the existing procedure that routes all ECs to a PSAP. An alternate Enhanced Emergency Call Handling Procedure (EECHP) was suggested and modeled using call flowchart and mathematical modeling techniques. The Models were then simulated and the results obtained analyzed. The results analysis showed significant improvement in call completion success (a measure of QoS) and decreasing Call blocking probability (increased accommodated EC traffic) for those GSM/W-CDMA originated emergency calls processed using the EECHP over those making use of the de-facto call handling procedure for same PSAP condition; thereby suggesting that the EECHP can be effectively used as a replacement for existing ECHP for reduced emergency call drops associated with congested or out of service PSrAP(s) and its attendant adverse effect on people’s lives and property.