Spatial Reuse Algorithm In Mm-Wave Wpan With Rate Adaptation

With the continuous development of multimedia applications, the wireless communication of transmission’s demand of rate and signal bandwidth is growing. Work in60GHZ, millimeter wave has become a hotpot in the field of short-range wireless communication with its huge bandwidth as high as7GHZ.60GHZ belongs to the millimeter wave signal, the millimeter wave beam concentration is high, and has a lot to the path loss of signal during transmission, these factors make60GHZ millimeter-wave wireless communication has the very good safety performance and anti-interference performance, which is conducive to the implementation of the short range of networking.In Millimeter wave wireless personal area network, the link between the interference is small, it’s for spatial reuse possible, effective spatial reuse can greatly improve the throughput of the network. Known space reuse algorithm mostly focus on the scheduling length or number of successful transmission link within each time slot, the spatial reuse algorithm based on rate adaptive mechanism has not been developed, reasonable rate adaptive mechanism will bring considerable sum rate, the physical and total rate has high correlation with network throughput, directly reflects the overall performance of a network.So about rate adaptive mechanism, which contains a large number of research opportunities, this paper proposed for an in-depth study, seek, on the basis of the existing spatial reuse algorithm by taking rate adaptive mechanism to improve the whole performance of60GHZ communication network method.In this paper, to maximize the network throughput and spatial reuse gain as the goal, based on the rate of the adaptive mechanism of spatial reuse scheduling algorithm, the simulation result shows that the algorithm extremely increase the gain of spatial reuse.this paper’s main works are listing below: First, the common Channel Interference CCI (Co-Channel Interference) measurement. Due to consider is the centralized network, the network equipment is controlled by a central node and N equipment, different link not clear before access networks with other link relationship between interference, interference and accurate measurement is the precondition of effective spatial reuse, so through directional communication, in a certain link to the full to receive other link, all link after the optimal beam to determine the good, the entire network link interference relationship was established, which will provide policy support for the subsequent link scheduling;Second, the establishment of the spatial reuse condition. Reasonable interference model is very important to build spatial reuse algorithm, by comparing the protocol interference model and the physical interference model, selection of physical interference model and combining the coexistence of different link conditions established CCI table.Third, based on the rate of the adaptive mechanism of spatial reuse algorithm. In the collection is in establishing good link coexist rate adaptive mechanism, analysis of each subset sum of link rate. According to link the SINR, determine appropriate data rate, and has the largest selection of rate of combined link set schedule. The MATLAB simulation results show that the algorithm fully tap the millimeter wave WPAN spatial reuse potential, realizes the algorithm is higher than the existing spatial reuse of network capacity.