Handover provisioning in WCDMA systems
Proceedings of the 3rd international conference on Mobile multimedia communications
Proceedings of the 4th ACM symposium on QoS and security for wireless and mobile networks
Performance evaluation of multi-guard channel schemes in broadband mobile networks
Mobility '08 Proceedings of the International Conference on Mobile Technology, Applications, and Systems
Optimized call admission control in wireless networks
ICAIT '08 Proceedings of the 2008 International Conference on Advanced Infocomm Technology
QOS provisioning for mobile and fixed wireless real time multimedia services
IMSAA'09 Proceedings of the 3rd IEEE international conference on Internet multimedia services architecture and applications
A new convolution algorithm for loss probability analysis in multiservice networks
Performance Evaluation
| Hi-index | 0.01 |
Next-generation wireless networks target to provide quality of service (QoS) for multimedia applications. We study the wireless systems that support two QoS requirements: keeping the handoff dropping probability less than a predefined QoS threshold while maintaining relative priorities for different traffic classes based on blocking probability. To achieve this goal, a dynamic multiple-threshold bandwidth reservation (DMTBR) scheme, which is capable of granting differential priorities to different traffic classes and to new and handoff traffic for each class by dynamically adjusting bandwidth reservation thresholds, is proposed. In this scheme, the thresholds are obtained in two steps. The initial values are estimated based on instantaneous network traffic situation, then the thresholds will be further adapted according to the instantaneous network QoS status. In times of network congestion, a preventive measure is taken to throttle the new connections. Another contribution of this paper is to generalize the concept of relative priority and hence give the network operator more flexibility to adjust admission control policy by taking into account some dynamic factors such as offered load. The extensive simulations are conducted for two purposes. First, we verify the performance of the proposed scheme and show our scheme performs well under various traffic loads. Second, we demonstrate that the DMTBR scheme gains more advantages when taking the offered load into consideration.