New Call Admission Control and Handoff Techniques for 3-G Mobile Networks

Abstract

In mobile Networks each type of Services has distinct characteristics and QoS requirement. The important issues in 3-G N/W are to prepare a framework for multi-class services to perform call admission and handoff efficiently. The available Call Admission Control (CAC) and Handoff Techniques in mobile network have considered only single class of service or have touched value of few classes but not beyond. In this paper we have considered 8 types of services, which are differentiated according to their Acceptable delay in transmission, Buffering capacity, Transmission mode and Bit rate. In this approach CAC and Handoff issues are resolved by awarding Priority Number to each cal, which will also resolve issue of collision in CAC and handoff. Performance of proposed frame-work for CAC and Handoff is evaluated by calculating Call Dropping probability and Call Completion probability.

Simulation of Endpoint Based Call Admission Control Using Retransmission Timer

“…Certain flaws which are most common in Endpoint based Call Admission Control are described in this paper. According to the algorithm given in [2] and [15], the probe packet is considered to be lost if it is not received within tv AC i.e. Average Round Trip Time Delay and in this case the threshold value is incremented by one each time.…”

“…The VoWLAN can be interfaced with the first case with the help of legacy PBX through voice gateway. [15][2]. In the case of wired VoIP, wireless handsets are taken into use in the presence of the gateways and VoIP servers.…”

Elastic threshold-based admission control for QoS satisfaction with reward optimization for servicing multiple priority classes in wireless networks

“…There have been CAC algorithms proposed that partition system resources and allocate distinct partitioned resources to serve distinct service classes [11][12][13][14][15][16][17][18][21][22][23]. In particular, Ogbonmwan, Li and Kazakos [11] investigated the use of thresholds for a system with two service classes.…”