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- Shyamnath Gollakota
- MIT, Cambridge, MA, USA
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- Dina Katabi
- MIT, Cambridge, MA, USA
書誌事項
- タイトル別名
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- combating hidden terminals in wireless networks
この論文をさがす
説明
<jats:p>This paper presents ZigZag, an 802.11 receiver design that combats hidden terminals. ZigZag's core contribution is a new form of interference cancellation that exploits asynchrony across successive collisions. Specifically, 802.11 retransmissions, in the case of hidden terminals, cause successive collisions. These collisions have different interference-free stretches at their start, which ZigZag exploits to bootstrap its decoding.</jats:p><jats:p>ZigZag makes no changes to the 802.11 MAC and introduces no overhead when there are no collisions. But, when senders collide, ZigZag attains the same throughput as if the colliding packets were a priori scheduled in separate time slots. We build a prototype of ZigZag in GNU Radio. In a testbed of 14 USRP nodes, ZigZag reduces the average packet loss rate at hidden terminals from 72.6% to about 0.7%.</jats:p>
収録刊行物
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- ACM SIGCOMM Computer Communication Review
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ACM SIGCOMM Computer Communication Review 38 (4), 159-170, 2008-08-17
Association for Computing Machinery (ACM)