文章基本信息

标题：P-TDMA-SYS: A TDMA System over Commodity 802.11 Hardware for Mobile Ad-hoc Networks
本地全文：下载
作者：Zechen Lin ; Zechen Lin ; Zhizhong Ding 等
期刊名称：Journal of Communications
印刷版ISSN：1796-2021
出版年度：2016
卷号：11
期号：8
页码：710-725
DOI：10.12720/jcm.11.8.710-725
语种：English
出版社：ACADEMY PUBLISHER
摘要：In some scenarios such as catastrophes and military operations, there is a need for communication without an infrastructure. In urgent cases, in-time and reliable channel access must be ensured. However, the channel access delay in widely used CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) network increases unpredictably when the channel is sensed busy. Therefore, TDMA (Time Division Multiple Access) gets more and more attention in mobile ad-hoc network research. This paper presents a TDMA network system (named as P-TDMA-SYS) that is designed to support real-time applications in mobile ad-hoc networks (MANETs) and successfully works on commodity 802.11 hardware. The key feature of P-TDMA-SYS is its microsecond synchronization and adaptive medium access policy. P-TDMA-SYS's implementation contains two major modules. One is the P-KER-MAC, a TDMA-based MAC protocol, running over commodity 802.11 hardware. The other is P-TCP, a cross-layer TCP congestion control algorithm specifically for P-KER-MAC. The presented TDMA-based MAC over commodity 802.11 hardware has been tested with a detailed accounting of the hardware and operation system overheads. Furthermore, P-TDMA-SYS has been compared with 802.11 CSMA/CA-based network in the single-hop/multi-hop scenarios. The test results show that our implementation achieves reliable throughput and low delay/jitter for supporting real-time applications.
关键词：TDMA MAC;ad-hoc networks;IEEE 802.11