| TCP Fairness Improvement Scheme using Adaptive Contention Window in Wireless Mesh Networks |
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In Sik Jang, Seok Hong Min, Bong Gyu Kim, Hyung Suk Choi, Jong Sung Lee, Byung Chul Kim, Jae Yong Lee |
1KARI
2Chungnam National University
3 |
| 무선 메쉬 네트워크에서 적응적 경쟁 윈도우를 이용한 TCP Fairness 개선 방안 |
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장인식, 민석홍, 김봉규, 최형석, 이종성, 김병철, 이재용 |
1한국항공우주연구원
2충남대학교
3국방과학연구소 |
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| Abstract |
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Wireless Mesh Networks(WMNs) is generally composed of radio nodes in the mesh topology. WMNs consists of mesh client, mesh router and gateway connected to a wired network. Each client and router relay messages to the gateway for communication. WMNs is widely used recently in many areas can provide extended coverage based on multi-hop communication and ubiquitous communication at any time and any location. However the competition and collision between each node to transmit data is inevitable when the same channel is used for transmission. The transmission opportunities and the throughput of nodes located far from gateway decrease more if the communication channel is accessed based on competitive CSMA/CA scheme using DCF(Distributed Coordination Function) provided by IEEE 802.11 MAC. In this paper, we improve the performance of the TCP fairness and throughput of the nodes with more than 2 hops by applying various algorithms for controlling contention window values. Also, we evaluate the performance using ns-2 simulator, According to the results, proposed scheme can enhance the fairness characteristic of each node irrespective of data to the gateway. |
| Key Words:
WMNs, DCF, Multi-hop Communications, Contention Window |
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