Multi-channel MAC protocol with snooping for multi-hop wireless networks

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In multi-channel wireless ad-hoc network, several nodes can transmit data simultaneously in different channels. Thus the overall network performance can be improved significantly compared to single channel network. Various multi-channel MAC protocols have been proposed to coordinate the usage of multiple channels between wireless nodes. However, multi-channel MAC protocols based on dynamic channel selection cause multi-channel hidden node problem in multi-hop wireless network. We evaluated the bad influence of multi-channel hidden node problem on the performance of multi-hop wireless network and showed that the problem decreases the performance of network as much as the use of multiple channels is not effective. This paper proposes a new approach of channel selection based on snooping. Nodes snoop data channels during idle times and then select an idle data channel within the carrier sensing range using both the snooping results and the channel usage information. We analyzed the throughput of DCSS in single-hop and multi-hop topologies. We also implemented multi-channel MAC simulator and performed simulation study with various scenarios. Our simulation results verify that the proposed channel selection approach can effectively avoid the multi-channel hidden node problem and improve the networkwide performance.
Advisors
Ma, Joong-Sooresearcher마중수researcher
Description
한국정보통신대학교 : 공학부,
Publisher
한국정보통신대학교
Issue Date
2009
Identifier
393130/225023 / 020045311
Language
eng
Description

학위논문(박사) - 한국정보통신대학교 : 공학부, 2009.2, [ ix, 83 p. ]

Keywords

채널 선택; 무선 애드 혹 네트워크; 멀티 채널 MAC 프로토콜; Wireless Ad-Hoc Networks; Multi-Channel MAC Protocol; Channel Selection

URI
http://hdl.handle.net/10203/54622
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=393130&flag=dissertation
Appears in Collection
School of Engineering-Theses_Ph.D(공학부 박사논문)
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