Proceedings Article10.1145/1859995.1859998
Side channel: bits over interference
Kaishun Wu,Haoyu Tan,Yunhuai Liu,Jin Zhang,Qian Zhang,Lionel M. Ni +5 more
- 20 Sep 2010
- pp 13-24
98
TL;DR: An interesting observation that by generating intended patterns, some simultaneous transmissions can be successfully decoded without degrading the effective throughput in original transmission is observed, and a DC-MAC is proposed to leverage this "free” coordination channel for efficient medium access in a multiple-user wireless network.
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Abstract: Interference is a critical issue in wireless communications. In a typical multiple-user environment, different users may severely interfere with each other. Coordination among users therefore is an indispensable part for interference management in wireless networks. It is known that, coordination among multiple nodes is a costly operation taking a significant amount of valuable communication resource. In this paper, we have an interesting observation that by generating intended patterns, some simultaneous transmissions, i.e., "interference", can be successfully decoded without degrading the effective throughput in original transmission. As such, an extra and "free" coordination channel can be built. Based on this idea we propose a DC-MAC to leverage this "free" channel for efficient medium access in a multiple-user wireless network. We theoretically analyze the capacity of this channel under different environments with various modulation schemes. USRP2-based implementation experiments show that compared with the widely adopted CSMA, DC-MAC can improve the channel utilization efficiency by up to 250%.
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References
•Book
Digital Communications
John G. Proakis
- 01 Jan 1983
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
27.7K
•Book
Fundamentals of Wireless Communication
David Tse,Pramod Viswanath +1 more
- 01 Jan 2005
TL;DR: In this paper, the authors propose a multiuser communication architecture for point-to-point wireless networks with additive Gaussian noise detection and estimation in the context of MIMO networks.
12.4K
Digital communications
J.E. Mazo
- 01 Nov 1985
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
10.2K
Interference Alignment and Degrees of Freedom of the $K$ -User Interference Channel
Viveck R. Cadambe,Syed A. Jafar +1 more
TL;DR: For the fully connected K user wireless interference channel where the channel coefficients are time-varying and are drawn from a continuous distribution, the sum capacity is characterized as C(SNR)=K/2log (SNR)+o(log( SNR), which almost surely has K/2 degrees of freedom.
XORs in the air: practical wireless network coding
TL;DR: The results show that using COPE at the forwarding layer, without modifying routing and higher layers, increases network throughput, and the gains vary from a few percent to several folds depending on the traffic pattern, congestion level, and transport protocol.