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| Supporting service differentiation with enhancements of the IEEE 802.11 MAC protocol:Models and analysis | |
| 作者姓名： | Roberto Battiti |
| 作者单位： | Department of |
| 基金项目： | 国家自然科学基金;陕西省自然科学基金 |
| 摘 要： | As one of the fastest growing wireless access technologies, wireless LANs must evolve to support adequate degrees of service differentiation. Unfortunately, cur-rent WLAN standards like IEEE 802.11 Distributed Coordination Function (DCF) lack this ability. Work is in progress to define an enhanced version capable of support-ing QoS for multimedia traffic at the MAC layer. In this paper, we aim at gaining insight into three mechanisms to differentiate among traffic categories, i.e., differ-entiating the minimum contention window size, the Inter-Frame Spacing (IFS), and the length of the packet payload according to the priority of different traffic cate-gories. We propose an analysis model to compute the throughput and packet transmission delays. In addition, we derive approximations to obtain simpler but more meaningful relationships among different parameters. Comparisons with discrete-event simulation results show that good accuracy of performance evalua-tion can be achieved by using the proposed analysis model. |
| 收稿时间： | 12 June 2006 |
| 修稿时间： | 18 April 2007 |
Supporting service differentiation with enhancements of the IEEE 802.11 MAC protocol: Models and analysis |
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| Roberto Battiti.Supporting service differentiation with enhancements of the IEEE 802.11 MAC protocol:Models and analysis[J].Science in China(Information Sciences),2007,50(5):732-746. | |
| Authors: | LI Bo LI JianDong Roberto Battiti |
| Affiliation: | 1. School of Electronic and Information, Northwestern Polytechnical University, Xi'an 710072, China 2. ISN National Key Lab, Xidian University, Xi'an 710071, China 3. Department of Computer Science and Telecommunications, University of Trento, 38050 POVO Trento, Italy |
| Abstract: | As one of the fastest growing wireless access technologies, wireless LANs must evolve to support adequate degrees of service differentiation. Unfortunately, cur- rent WLAN standards like IEEE 802.11 Distributed Coordination Function (DCF) lack this ability. Work is in progress to define an enhanced version capable of support- ing QoS for multimedia traffic at the MAC layer. In this paper, we aim at gaining insight into three mechanisms to differentiate among traffic categories, i.e., differ- entiating the minimum contention window size, the Inter-Frame Spacing (IFS), and the length of the packet payload according to the priority of different traffic cate- gories. We propose an analysis model to compute the throughput and packet transmission delays. In addition, we derive approximations to obtain simpler but more meaningful relationships among different parameters. Comparisons with discrete-event simulation results show that good accuracy of performance evalua- tion can be achieved by using the proposed analysis model. |
| Keywords: | wireless LAN IEEE 802 11 MAC service differentiation performance analysis |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ | |
