Dawei Niu

Algorithm of exposed terminals concurrent transmission based on reverse path in MANET

The problem of exposed terminals in AD Hoc results in wireless channel resource being wasted, which limits the network capability severely. By comparing with most solutions of this problem, we give new descriptions of exposed terminals and the exposed receive terminals. Then a concurrent transmission algorithm based on reverse path of route is proposed. By simulation we analyze the capacity of the new method and evaluate the influence of different parameters. The Simulation results show that compared with DCF, DCF with RPE improves the network throughput greatly with moderately low overhead.

A Inter Satellite Link Algorithm of Satellite Navigation System Based on the Integration

Over the years satellite networks has played an more and more important role, and there has been the trend to build Inter-Satellite Links (ISLs) in the satellite networks as the ISLs can provide high network flexibility and reliability. Integration is one of the important characteristics of the navigation system, and the network topology of the inter satellite has great influence on it, so it’s necessary to improve the performance of navigation system through appropriate inter satellite link planning. Aiming at this problem, this paper firstly established the link planning principles, and then the visible coverage relationship is proposed for a satellite link allocation algorithm, which is the foundation of the network topology formation. The topology gives preference to the data transmission between satellite and ground, the simulation results show that this network topology has an advantage in hops and delay performance.