Call Re-routing Control in Two-hop Relaying Cellular System

摘要

Modern cellular system has come a long way with an evolvement of novel infrastructure integrated with relaying system. It requires flexible radio resources management algorithm related to relaying routing and re-routing caused by mobility. In order to find the optimal transmission routes for the mobile terminal (MT), the novel call re-routing control (CRC) algorithms are investigated to achieve the efficient resources utilization. Furthermore, combining a certain routing scheme with the resources guard strategy, which increases the capacity of the system more cost-effectively, a MT can choose traditional direct transmission link or two-hop relaying link based on the current link performance by adoptively adjusting the transmission mode. As the simulation result shown, with the same relaying user percentage, the signal-to-noise ratio (SIR) based CRC algorithm can further improve the system capacity than the path gain (PG) based algorithm by timely selecting the link with better transmission quality. Moreover if the resources guard strategy is adopted, the relaying system can achieve higher data rate.