Research On IEEE 802.11ax Energy Saving Technology Based On Scheduling

With the rapid growth of mobile services,the scale of communications networks has continued to expand,and the energy consumption of wireless communications has also grown rapidly.Especially in high-density networking conditions,the number of stations is dense,communication is frequent,so the communication energy consumption is greatly increased.From the With the rapid growth of mobile services,the scale of communications networks has continued to expand,and the energy consumption of wireless communications has also grown rapidly.Especially in high-density networking conditions,the number of sites is dense,communication is frequent,and communication energy consumption is greatly increased.From the perspective of information transmission,communication energy consumption consists of transmission energy consumption and circuit energy consumption.In addition to payload data,data packets transmitted in wireless communication contain a large number of invalid indications such as frame headers and frame trailers.Communication energy consumption should minimize the transmission of invalid information.For communication sites,in order to minimize the communication energy consumption,stations should be in a low-power sleep state when they are not working.t of information transmission,communication energy consumption consists of transmission energy consumption and circuit energy consumption.In addition to payload data,data packets transmitted in wireless communication contain a large number of invalid indications such as frame headers and frame trailers.Communication energy consumption should minimize the transmission of invalid information.For communication stations,in order to minimize the communication energy consumption,stations should be in a low-power sleep state when they are not working.The IEEE 802.11 ax system is mainly used for scenarios where the number of stas is heavy,access is frequent,and service data volume is large.In order to reduce channel competition and optimize resource scheduling,the MAC layer adopts AP centralized control mode,and the AP uniformly schedules channel resources,but at the same time This has brought problems such as increased signaling overhead that affect communication energy consumption.Therefore,this paper studies the optimal design of energy-saving based on scheduling in the IEEE 802.11 ax system.This paper first summarizes the key performance index of energy efficiency and defines the energy efficiency gain.Then the key technologies of energy saving in IEEE 802.11 ax system are introduced,including station sleep technology based on low-power wake-up receiver,energy-saving scheduling method based on OFDMA,and target wake-up time scheduling mechanism.Then,this paper optimizes the sleep-based scheduling method.First,based on the low-power wake-up receiver,the target wake-up time energy-saving scheduling mechanism suitable for the IEEE 802.11 ax system is designed.Then,the low-power wake-up receiver is optimized,a wake-up packet that wakes up multiple users based on the Walsh code sequence is designed,and the downlink bundling data packet is sent directly after waking up multiple users,thereby achieving a considerable energy efficiency gain.Finally,an IEEE 802.11ax-based OFDMA scheduling method proposes an energy-saving scheduling method based on time multiplexing.The simulation verified the energy efficiency gain under the time-reuse scheduling method.The optimization of the IEEE 802.11 ax energy-saving technology based on scheduling proposed in this paper can effectively reduce the communication energy consumption and play an important role in the research of energy-saving technologies in high-density networks in the future.