Research And Development Of New Routing Protocol For Ultra High Throughput WLAN

As wireless network traffic continues to grow,Wireless Local Area Networks(WLAN),as an important part of the 5~thh Generation Communication System(5G)technology convergence system,will carry more and more network pressure for the 5G era.As the standard for WLAN,the IEEE 802.11 series of protocols continue to evolve for new scenarios and requirements.For example,IEEE 802.11ax focuses on user-intensive scenarios.IEEE802.11ay works on the 60 GHz millimeter-wave band and uses beamforming to combat interference.Ultra high throughput WLAN is a new type of WLAN that combines the new requirements and new scenarios of the IEEE 802.11 protocol.It introduces beam-switching antenna and routing technology,aims at regional high-throughput transmission and guarantees the quality of service(QoS)of dense user groups,forms a wireless self-organizing multi-hop network through a certain routing protocol,and realizes the direct connection of terminal devices between nodes in the region with support for regionally dense user groups,narrow beam propagation and so on.In the heterogeneous 5G networks,ultra high throughput WLAN can work in conjunction with cellular networks to integration into the 5G network architecture to carry some traffic pressure.In a scenario where users are increasingly dense,routing protocols in the network will be the core issue affecting network transmission quality.Therefore,this paper takes the requirements of IEEE 802.11 series protocol as the goal,and uses ultra high throughput WLAN as a model to research and develop its routing protocol.This paper first summarizes the ultra high throughput WLAN and its routing technology,and studies the routing metric in routing protocols.Aiming at the high requirements of rate transmission in ultra high throughput WLAN and the requirement of users'QoS,this paper considers the available bandwidth of link as an important consideration,and studies the available bandwidth estimation algorithm.Combined with the beamforming idea of IEEE802.11ay,this paper introduces beam-switching antenna,and proposes an available bandwidth estimation combined with switchable beam antennas to give full play to the advantages of available bandwidth in routing.Experiments show that the available bandwidth estimation proposed in this paper is more accurate,can track the change of bandwidth,and have different results in different beam directions,so that the routing protocol can be used as the standard and combined with the beam switching antenna for routing.Further,this paper is progressive on the routing metric problem,and considers the available bandwidth metric as a single consideration and not comprehensive enough.In addition,once a node is selected to be busy in the network,it will face link congestion problem.In response to this problem,this paper is inspired by the idea of Pareto distribution,and proposes a historical information mechanism to measure the transmission capacity and busyness of nodes.Based on the available bandwidth and historical information,this paper uses the analytic hierarchy process(AHP)to consider the multi-parameter effects and construct a normalized distribution function to construct a link quality factor that can comprehensively reflect the network conditions.On this basis,based on the"competition"idea in opportunistic routing,this paper designs a next hop forwarding mechanism with"competition"form.Combined with software and hardware,this paper builds an experimental platform and conducts experimental verification.Experiments show that the routing protocol studied in this paper can perform multi-hop transmission in the harsh environment,complete regional multi-hop networking,and improve the transmission rate of users to some extent.