Underlay Cognitive Radio Networks For Military Information Access Model Based On Polling

Under the current trend of joint military command,the strength of the military communication capability and intelligence detection capability of each department determines whether the maximum operational effectiveness can be achieved in the joint operation command system.With the pace of our military information construction,the expansion of the scale of military communication network,the demand of military wireless communication also is in rapid growth,the corresponding demand for wireless spectrum resources is growing,and Cognitive Radio(CR)technology can effectively solve the spectrum due to wireless devices to increase the problem of insufficient resources.The main idea of Cognitive Radio is that cognitive users,without interfering with the authorized users,dynamically use the authorized frequency band to achieve the purpose of increasing the corresponding frequency utilization.At present,in the field of cognitive radio,the utilization of spectrum resources and the throughput rate of the system are improved mainly from the aspects of spectrum perception and spectrum allocation.This paper analyzes the dynamic access and distribution of military cognitive terminals under the background of the establishment of the corresponding intelligence detection system in a town,LinCang.In this paper,the order from single queue model to multiple queue model to mixed queue model is analyzed and studied.In only one sender(a sending channel),a receiver and multiple cognitive request of the system,the introduction of a polling thought on the system modeling analysis,performance of the measuring system,real-time and information.Then analysis the general polling model,compared with the bottom line in the cognitive radio network full service,threshold and limited(K = 1)services for three different access performance of the polling model.Through simulation analysis: general polling model,with the increase of arrival rate,full service polling model and threshold service polling model of real-time and information degree were similar,but were superior to qualified service polling model(K = 1).On the basis of the general polling model considering more complex has a priority two level mixed model-a priority queue and multiple queue,generally for all priority queue with full service to ensure that the priority queue,and then are used completely for the average queue,threshold and limited(K = 1)three different access patterns.Through simulation analysis,two stage hybrid polling model,for the priority queue,the performance of the three models were similar,with the increase of arrival rate,fully-limited(K = 1)access model is slightly better than fully-fully access model and fully-threshold access model;But to average queue,completely-fully access model and fully-threshold access model performance index is superior to complete-limit(K = 1)access model,but in terms of fairness,and fully-limited(K = 1)access model more fair compared with the other two models.