TY - GEN
T1 - Channel control for multi-radio multi-channel wireless mesh networks
AU - Law, K. L.Eddie
AU - Hung, Wing Chung
PY - 2008
Y1 - 2008
N2 - IEEE 802.11 wireless local area networks (WLANs) technologies are being considered as potential turnkey solutions for constructing infrastructures of wireless mesh networks (WMNs). With known experiments and simulation results, performances at the transport layer, including the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), have not been doing satisfactorily for connections passing through multiple hops using 802.11 technologies. Data throughput usually drops significantly when a connection has to go through more than three wireless hops. Since UDP is a simple connectionless protocol, its performance failure indicates that the design of 802.11 Medium Access Control (MAC) protocol may not be competent to handle traffic on the wireless mesh networks. In this paper, a multi-radio multi-channel wireless mesh network architecture with a novel MAC protocol design is proposed. The MAC protocol extends the Request-to-Send/Clear-to-Send message pair in 802.11 for channel reservation operations. Only two stations at an instant can have the sole possession of a specific channel with an announced duration. During this duration, the two stations can establish a connection for sending multiple segments to each other, if needed. This per-hop reservation concept can further be deployed into multi-hop wireless networks, and high throughput data rate should be achievable for multi-hop TCP and UDP connections.
AB - IEEE 802.11 wireless local area networks (WLANs) technologies are being considered as potential turnkey solutions for constructing infrastructures of wireless mesh networks (WMNs). With known experiments and simulation results, performances at the transport layer, including the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), have not been doing satisfactorily for connections passing through multiple hops using 802.11 technologies. Data throughput usually drops significantly when a connection has to go through more than three wireless hops. Since UDP is a simple connectionless protocol, its performance failure indicates that the design of 802.11 Medium Access Control (MAC) protocol may not be competent to handle traffic on the wireless mesh networks. In this paper, a multi-radio multi-channel wireless mesh network architecture with a novel MAC protocol design is proposed. The MAC protocol extends the Request-to-Send/Clear-to-Send message pair in 802.11 for channel reservation operations. Only two stations at an instant can have the sole possession of a specific channel with an announced duration. During this duration, the two stations can establish a connection for sending multiple segments to each other, if needed. This per-hop reservation concept can further be deployed into multi-hop wireless networks, and high throughput data rate should be achievable for multi-hop TCP and UDP connections.
KW - 802.11
KW - connection drops
KW - delay
KW - multi-radio multi-channel medium access control protocol
KW - saturation throughput
KW - two-way multiple-segment MAC protocol
KW - wireless local area networks
KW - wireless mesh networks
UR - http://www.scopus.com/inward/record.url?scp=84866518963&partnerID=8YFLogxK
U2 - 10.1145/1454630.1454654
DO - 10.1145/1454630.1454654
M3 - Conference contribution
AN - SCOPUS:84866518963
SN - 9781605582399
T3 - PM2HW2N'08 - Proceedings of the 3rd ACM International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks
SP - 157
EP - 164
BT - PM2HW2N'08 - Proceedings of the 3rd ACM International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks
T2 - 3rd ACM International Workshop on Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks, PM2HW2N 2008
Y2 - 31 October 2008 through 31 October 2008
ER -