Efficient traffic allocation scheme for multi-flow distribution in heterogeneous networks

This paper proposes an efficient dynamic traffic allocation scheme for multi-flow distribution in LTE-WLAN heterogeneous networks, where data traffic is split into multiple sub-flows and transmitted through different networks simultaneously. The state transition equations of the M/M/1 queuing system are modified to model the parallel transmissions. To make our scheme more practical, the modified model also considers random interference and dynamic changes of available bandwidth, which are often ignored in previous works. In addition, traffic characteristics are taken as key concerns in the formulation of allocation scheme to make it more effective. A novel scheme - layered video streaming allocation (LVSA)- based on traffic characteristics is proposed to increase system capacity, especially in high delay situations. Simulation results indicate that our schemes have a significant improvement in delay performance and system capacity compared with other schemes.