Design And Implementation Of Resource Scheduling Algorithm In CSMA-Based Full-duplex WLAN

In recent years,with the rapid development of communication technology,people's requirements for wireless communication are rapidly upgraded.To meet the growing demand for data traffic,Full-duplex technology has been extensively studied to solve this problem.However,full-duplex communication improves the system performance,but also brings the problem of interference between users.Therefore,how to design an effective scheduling scheme to solve the problem of interference between users and make full use of the performance improvement brought by full-duplex technology has important research significance.On the other hand,in the current WLAN,due to the limitations of mobile devices,it is impossible to provide continuous energy supply anytime and anywhere.Most mobile terminals(such as mobile phones,tablets)rely on batteries to supply energy.Therefore,while applying full-duplex technology to improve the performance of the system,energy saving should also be considered.That is to say,under the premise of guaranteeing communication demand,designing effective schemes to reduce energy consumption has important application value.Specifically,the main contents and innovations of this study lie in:(1)Design a user utility maximization scheduling scheme based on Carrier Sense Multiple Access(CSMA)in full-duplex WLAN to give full play to AP's full-duplex capability.Specifically,first,we analyze the process of sending data between full-duplex AP and half-duplex users in WLAN,and establish the network topology in full-duplex scenario;then,we analyze the interference relationship between different users,and select the appropriate matching scheme to complete the matching of uplink and downlink;next,based on the matching results,the access intensity of uplink users is adjusted to maximize the efficiency of downlink users.The simulation results show that the performance of the proposed scheduling scheme is better than that of other existing full-duplex scheduling schemes.(2)The energy-saving problem for full-duplex WLAN using Inter-Client Interference Cancellation(IC2)technology is studied.Specifically,IC2 technology is introduced into the traditional full-duplex WLAN to establish a new system model.User pairing algorithm based on Signal to Interference plus Noise Ratio(SINR)is used to complete the matching between uplink and downlink users.Under the condition of satisfying the basic data rate requirements of uplink and downlink users,a power control scheme is established to minimize the system total energy consumption;the effectiveness of the proposed energy-saving scheme is verified by simulation analysis,and compared with the existing energy-saving scheme,it is found that our scheme has better energy-saving effect.