Performance enhancement of contention-based bandwidth request mechanism in IEEE 802.16 WiMAX networks

Shih Fan Chou, Jen Hsi Liu, Hsi Lu Chao, Tzu Chi Guo, Chia Lung Liu, Feng Jie Tsai

研究成果: Conference contribution

5 引文 斯高帕斯(Scopus)

摘要

The IEEE 802.16 standard is a promising technology for 4G mobile networks. Though supporting versatile service classes, best effort (BE) service class is expected to dominate WiMAX networks, due to operational simplicity. One of bandwidth request mechanisms that subscriber stations (SS) can utilize to issue bandwidth requests (BW-REQ) for BE connections is contention-based random access. An SS starts a timer T16 when transmitting a BW-REQ. If getting a grant before timer expiration, the SS transmits data packets at the allocated time slots; otherwise it performs truncated binary exponential backoff process for BW-REQ retransmission. The default value of T16 is one frame time. However, T16 impacts on contention and request collision significantly. In the paper, we develop an analytical model for T16 timer setting. Besides, we derive analytical expressions for the average number of tries per BW-REQ and the average packet delay. We compare the theoretical results of fixed and adjustable timers. The results show that adjusting timer reduces both the number of collision and the average packet delay.

原文English
主出版物標題2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
頁面1287-1292
頁數6
DOIs
出版狀態Published - 2010
事件2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
持續時間: 2010 九月 262010 九月 30

出版系列

名字IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
國家/地區Turkey
城市Istanbul
期間10-09-2610-09-30

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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