tailieunhanh - Báo cáo hóa học: " Research Article Performance Evaluation of Uplink Delay-Tolerant Packet Service in IEEE 802.16-Based Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Performance Evaluation of Uplink Delay-Tolerant Packet Service in IEEE Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 549492 12 pages doi 2011 549492 Research Article Performance Evaluation of Uplink Delay-Tolerant Packet Service in IEEE Networks Zsolt Saffer 1 Sergey Andreev 2 and Yevgeni Koucheryavy2 department of Telecommunications Budapest University of Technology and Economics BUTE Magyar tudosok korutja 2 1117 Budapest Hungary 2Department of Communications Engineering Tampere University of Technology TUT Korkeakoulunkatu 10 33720 Tampere Finland Correspondence should be addressed to Zsolt Saffer safferzs@ Received 15 November 2010 Accepted 11 February 2011 Academic Editor Boris Bellalta Copyright 2011 Zsolt Saffer et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. We provide an analytical model for efficient dynamic capacity allocation in IEEE wireless metropolitan area network where the nonreal-time traffic can utilize the bandwidth unused by the real-time traffic. We investigate the uplink delay of the nrtPS service flow as a function of the capacity allocations for the rtPS ertPS and UGS service flows. Unicast polling is applied for the bandwidth reservation of the nrtPS and rtPS ertPS packets. Our analysis accounts for both reservation and scheduling delay components. The nrtPS packets arrive according to Poisson process. The model enables asymmetric capacity allocation as well as asymmetric nrtPS traffic arrival flows. The analytical model is applied for investigating the influence of the real-time traffic on the delay of the nrtPS service flow. We discuss also the determination of several traffic parameters under different constraints which have potential applications in network control. 1. Introduction IEEE standards family defines an air interface .