摘要： We consider the joint WiFi of?oading, admission control, and network management for the integrated WiFi and OFDMA-based cellular network. Speci?cally, we propose a quality-of-service (QoS) and mobility-aware admission control scheme that ef?ciently of?oads macrocell traf?c to WiFi and integrates a novel bandwidth borrow-return strategy while guaranteeing QoS requirements for users. These QoS constraints are explicitly modeled considering the throughput performance of carrier sense multiple access with collision avoidance scheme in the IEEE 802.11 WLAN and the fractional frequency reuse in the downlink cellular network. Then, we develop an analytical model to derive the blocking probabilities for calls in different service areas of a cell. Based on this analysis, we study the joint base station switching, power control, and traf?c of?oading problem for energy minimization under QoS constraints. We consider the time-varying call traf?c and develop an algorithm to ?nd the optimal solution of the problem. Numerical results are presented to demonstrate the performance of the proposed cross-layer resource management framework in the integrated network.