Abstract
Disaster response and recovery requires timely interaction and coordination of disaster responders in order to save people lives and property. Public safety land mobile radio networks provide only limited support of low speed data services, which is not efficient for the emergency communication. The Land Mobile Radio accesses the radio resources of cellular network for getting a wide variety of benefits such as new multimedia services, increased data rates. SIP based handoff solutions is still not good enough in the interworking public safety LMR and cellular network for emergency communication because SIP has been used “Break-before-make” mechanism. This paper describes proposed approach and its prototype implementation. The proposed approach, Seamless Session Initiation Protocol (S-SIP) with Optimal Radio Resource Utilization framework is proposed to ensure reduction of handoff delay, increase the radio resource utilization for service availability and service continuity. The “Make-before-break” mechanism is used in Seamless SIP scheme. As a result, it is found that the proposed schemes performed better than existing schemes sometimes that is double.
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