Video quality enhancement with user-specific resource allocation and power control in heterogenous network

摘要

Heterogeneous cellular network (HCN) consists of macro, pico and femto cells within the same geographical area. This network utilizes available spectrum efficiently using frequency reuse technique. Due to frequency reuse the HCN network suffers from inter-cellular interference. To reduce interference and to maintain QoS of pico and femto cell users, Time Domain Resource partitioning was used which improves QoS of pico and femto video users by compensating the macrocell quality. To improve the overall performance of the complete HCN, in this paper a new technique called user specific resource allocation (USR) and power control is proposed. With this scheme, the users are divided into groups based on the Signal-leakage-plus-noise ratio(SLNR) metric. Users with low SLNR are grouped as interfering users for them a semi-orthogonal resource allocation strategy is developed which reduces interference and improves the video quality of the pico and femto without degrading the macrocell video quality. Simulation results demonstrate that the proposed scheme provides better video quality for pico and femto cell users without degrading performance of macro cell compared to the existing system.