Open issues and challenges in providing quality of service guarantees in high-speed networks
ACM SIGCOMM Computer Communication Review
IEEE/ACM Transactions on Networking (TON)
Quality of service guarantees in mobile computing
Computer Communications
Distributed call admission control in mobile/wireless networks
IEEE Journal on Selected Areas in Communications
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With the advent of different types of applications inbandwidth scarce cellular environment, efficient usage of bandwidth while providingthe required Quality of Service (QoS) for these applications becomes achallenging issue. In a cellular environment, there is always a tradeoff between the efficient usage of network bandwidth and uninterrupted(seamless) communication to each user. The paramount importance is alwaysgiven to the seamlessness, which could be achieved by the reservation basedcall admission policies. The degree of seamlessness is proportional to theamount of reservation. The objective of any call admission policy is toprovide seamless communication with better bandwidth usage. This paper aimsat achieving this objective by improving the Shadow Cluster calladmission algorithm proposed recently in [8] for providing a high degree of seamlessness. Our proposed scheme exploits application semantics (lossprofile) and delay properties of the application during call admission forbetter bandwidth utilisation and call acceptance. Moreover, efficient usageof bandwidth is highly desired under peak load conditions and the same isachieved by our scheme. We have conducted extensive simulation studies toevaluate the effectiveness of the proposed scheme under diverse trafficconditions by comparing it with the shadow cluster algorithm. The resultsclearly indicate that our scheme offers better bandwidth utilization andcall acceptance rate than the shadow cluster algorithm for the same calldrop percentage.