Improving system capacity based upon user-specific QoS for heterogeneous networks

This paper describes how user-specific QoS requirements may improve spectral utilization in heterogeneous networks. Throughput improvements of FTP (File Transfer Protocol) applications benefiting from the rate adaptation and MAC scheduling algorithms for video applications that incorporate user-specific QoS to improve system capacity are demonstrated. These improvements are achieved while user satisfaction for video applications, as measured by the Mean Opinion Score (MOS), is maintained at an acceptable level. OPNET system simulations were performed for a set of FTP users and video users that were assigned specific QoS target levels in LTE systems. Simulation results show that significant system capacity improvements and acceptable MOS levels can be achieved for FTP users and video users, respectively, if such user-specific QoS requirements are considered in heterogeneous networks.