ZigZag Decoding: Combating Hidden Terminals in Wireless Networks
This paper presents ZigZag, an 802.11 receiver that combats hidden terminals. ZigZag exploits 802.11 retransmissions which, in the case of hidden terminals, cause successive collisions. Due to asynchrony, these collisions have different interference-free stretches at their start, which ZigZag uses t...
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2008
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| Online Access: | http://hdl.handle.net/1721.1/41084 |
| _version_ | 1811094799165423616 |
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| author | Katabi, Dina Gollakota, Shyamnath |
| author2 | Dina Katabi |
| author_facet | Dina Katabi Katabi, Dina Gollakota, Shyamnath |
| author_sort | Katabi, Dina |
| collection | MIT |
| description | This paper presents ZigZag, an 802.11 receiver that combats hidden terminals. ZigZag exploits 802.11 retransmissions which, in the case of hidden terminals, cause successive collisions. Due to asynchrony, these collisions have different interference-free stretches at their start, which ZigZag uses to bootstrap its decoding. 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 82.3% to about 0.7%. |
| first_indexed | 2024-09-23T16:05:18Z |
| id | mit-1721.1/41084 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:05:18Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | mit-1721.1/410842019-04-11T01:18:55Z ZigZag Decoding: Combating Hidden Terminals in Wireless Networks Katabi, Dina Gollakota, Shyamnath Dina Katabi Networks & Mobile Systems Hidden Terminals Software Radios Wireless Networks This paper presents ZigZag, an 802.11 receiver that combats hidden terminals. ZigZag exploits 802.11 retransmissions which, in the case of hidden terminals, cause successive collisions. Due to asynchrony, these collisions have different interference-free stretches at their start, which ZigZag uses to bootstrap its decoding. 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 82.3% to about 0.7%. 2008-04-08T19:15:18Z 2008-04-08T19:15:18Z 2008-04-08 MIT-CSAIL-TR-2008-018 http://hdl.handle.net/1721.1/41084 Massachusetts Institute of Technology Computer Science and Artificial Intelligence Laboratory http://hdl.handle.net/1721.1/42842 http://hdl.handle.net/1721.1/42842 14 p. application/pdf application/postscript |
| spellingShingle | Hidden Terminals Software Radios Wireless Networks Katabi, Dina Gollakota, Shyamnath ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title | ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title_full | ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title_fullStr | ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title_full_unstemmed | ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title_short | ZigZag Decoding: Combating Hidden Terminals in Wireless Networks |
| title_sort | zigzag decoding combating hidden terminals in wireless networks |
| topic | Hidden Terminals Software Radios Wireless Networks |
| url | http://hdl.handle.net/1721.1/41084 |
| work_keys_str_mv | AT katabidina zigzagdecodingcombatinghiddenterminalsinwirelessnetworks AT gollakotashyamnath zigzagdecodingcombatinghiddenterminalsinwirelessnetworks |