Generic Control Channel Mechanism for Mobile Multi-hop Networks

摘要

A brief summary of the accomplishments and conclusions of the work by BBN include: (1) An acknowledgement scheme to improve the throughput and reduce the delay for unicast control packets was designed and implemented. Experimental results showed that acknowledgments substantially improved unicast packet throughput and delay, and consequently improvement in a mixed traffic scenario. (2) Experiments to determine the mean and standard deviation of node degree in randomly generated network topologies using MMWN's propagation and mobility model was found to be much higher than expected in small networks. Since the fidelity of the MMWN system simulation was very high, due to hardware and budgetary constraints, only small (twenty or fewer nodes) networks could be evaluated with high confidence by BBN. In these conditions, the results of the experiments showed similar performance of TSMA and CSMA when the TSMA frame length was adjusted by the worst case frame length. (3) An autonomous topology control module (ATC) developed in BBN's DAWN system became available and could be used for controlling node degree, specifically, to reduce node degree. A network using ATC matched with aggressive TSMA schedules shows considerable promise as a strong solution for smaller networks.