Class of Service Support Layer for Wireless Mesh Networks

Jukka SUHONEN, Timo D. HAMALAINEN, Marko HANNIKAINEN
2010 International Journal of Communications, Network and System Sciences  
This paper presents an add-on Class of Service (CoS) layer for wireless mesh networks. The proposed protocol is applicable for contention-based MACs and is therefore compatible with most of the Wireless Local Area Network (WLAN) and Wireless Sensor Network (WSN) protocols. The protocol has a locally centralized control for managing data flows, which either reserve a fixed bandwidth or are weighted by fair scheduling. The protocol reduces transmission collisions, thus improving the overall
more » ... g the overall throughput. IEEE 802.11 adhoc WLAN has been taken as a platform for simulations and prototyping for evaluating the protocol performance. Network Simulator Version 2 (NS2) simulations show that the CoS protocol efficiently differentiates bandwidth, supports bandwidth reservations, and reaches less than 10 ms transfer delay on IEEE 802.11b WLAN. Testing with a full prototype implementation verified the performance of the protocol. IJCNS 142 Differentiated Mode Scheduling Algorithm This section presents one possible algorithm for providing bandwidth differentiation as shown in (1). The algorithm realizes bandwidth allocation by scheduling transmission opportunities based on the flow priority values, requests sent by the devices, and the amount of successfully transmitted traffic. The use of transmitted traffic
doi:10.4236/ijcns.2010.32021 fatcat:x7b7j6ajrrhmjpxhw7aizx72au