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A MANET System Supporting TDMA and CSMA on One Commercial Network Card

Zhizhong Ding 1,2, Ke Cheng 1,2, Momiao Zhou 1,2, Tian Jiang 1, Xuewen Guo 1, Yinling Fu 3, and Zechen Lin 4
1. School of Computer and Information, Hefei University of Technology, Hefei, 230009, China
2. Key Laboratory of Knowledge Engineering with Big Data of Ministry of Education, Hefei University of Technology
3. China Mobile (Hangzhou) Information Technology Co., Ltd, Hangzhou, 310000, China
4. Alipay Technologies Co., Ltd China, Hangzhou, 310000, China
Abstract—Mobile Ad-hoc network (MANET) has great potential applications for these cases where there is no infrastructure or infrastructure is damaged. However, there are no mature products publicly available so far on markets. The current standardized technology either does not support Ad hoc network or does not provide enough bandwidth to support video transmission. Further more, those technologies are all based on Carrier Sense Multiple Access (CSMA) channel access control, which will greatly degrade network performance due to serious access conflicts in a large scale network. Meanwhile CSMA can not guarantee in its mechanism that commander messages are always transmitted out in-time enough. A new type of MANET communication terminal is presented in this paper, aiming to solve the problems. Its main characteristics are to support both CSMA and Time Division Multiple Access (TDMA) on a commercial WiFi network card hardware and to be able to switch between CSMA and TDMA adaptively according to conflict rate of channel access. With this approach, a MANET with balanced performance for small- and large-scale network is achieved.
 
Index Term—Ad-hoc network, MANET, emergency communication, CSMA, TDMA

Cite: Zhizhong Ding, Ke Cheng, Momiao Zhou, Tian Jiang, Xuewen Guo, Yinling Fu, and Zechen Lin, “A MANET System Supporting TDMA and CSMA on One Commercial Network Card,”Journal of Communications vol. 15, no. 2, pp. 148-156, February 2020. Doi: 10.12720/jcm.15.2.148-156
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