Performance of a Rural Wireless PTMP Network with Integrated Data and VolP
Johnson, David R
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The Internet continues to grow at a phenomenal rate, due in part to the growing availability of high speed access devices. These high speed services are not cost effective to implement in sparsely populated regions and there is a growing disparity between the level of service available to urban and rural Canadians. Fixed Wireless Access (FWA) could potentially provide high speed services over long distances to hard to reach rural sites. TRLabs' Multipoint Communication System (MCS) was designed specifically to provide high speed Internet access and voice service over a FWA radio channel to a cluster of rural clients. This thesis studies the capability of TRLabs' MCS to improve Internet access to rural residents and provide toll quality voice. In order to accomplish this, a realistic Yukon scenario was examined, current networking technology. was researched and a simulator model of the MCS and surrounding network was created. C++ modules were built to emulate the MCS behavior and interfaced with the existing Network Simulator. The TRLabs' MCS was able to prioritize delay sensitive voice while still transporting data efficiently. The mean delay for voice only increased by 12% between no and full load data conditions. No packets were lost, until the simulated distance between client and hub was increased to > 50 km. Voice delay increased as the backbone bandwidth was constricted due to increased serialization delay. In the end analysis, the MCS algorithm is fully capable of guaranteeing toll quality anywhere in the Yukon. The MCS protocol is also more advanced than the point coordination function mode of the IEEE 802.11 and more efficient than the distributed coordination function for supplying Internet data services to rural clients over relatively long distances.