An uplink resource allocation strategy in heterogeneous networks based on WLAN

WLAN can provide high data rates for users, which is an effective complement to traditional cells in heterogeneous networks. However, resource management in WLAN is different from the central allocation of cellular networks, where exist collision and performance anomaly. A maximizing utility function problem was formulated, which allowed for the collision and performance anomaly in WLAN. Due to the non-convexity of constraints, the problem could not be solved directly. Poisson approximation of binominal distribution and the relationship between user number and collision probability were used to transform it into a convex problem. A distributed algorithm was proposed to optimally allocate resources between networks. Simulation results show that it can significantly enhance system performance and improve the utilization of WLAN.