Analysis And Design Of Random Burst Multiple Access Protocol

The rapid development of wireless communication is prompting the diversification of business types,and at the same time,the requirements for network delay and reliability are getting higher and higher.Whether it is military tactical data link technology or civilian 5G ultra-reliable and ultra-low latency scenarios,millisecond-level end-to-end latency and a close to 100% packet success probability are required.It is difficult for traditional multiple access protocols to meet the high requirements for delay and reliability of modern networks.The random burst multiple access protocol stands out among the protocols with its excellent performance.The random burst multiple access protocol can divide different types of services into multiple priorities according to their Qo S requirements and transmit them according to the specific mechanism of the protocol.While ensuring the basic Qo S requirements of each priority service,the highest priority service can be a 2ms access latency and a 99% packet success probability.Nowadays,the analysis of random burst multiple access protocol is not perfect,especially the analysis of the protocol performance.This paper mainly focuses on analyzing the reliability of random burst multiple access protocol.Firstly,the analytical framework of the protocol is innovatively constructed from the perspective of space,and the closed-form expressions of key performance parameters are deduced and verified.Then,the directional antenna is introduced to explore the improvement of the protocol performance when the directional antenna is combined with the random burst multiple access protocol.Finally,a spatio-temporal analysis model is constructed,and the performance of the comprehensive analysis protocol is linked to the two dimensions of time and space.The main results obtained in this paper are as follows:1.In this paper,a statistical method of channel occupancy statistics(COS),the key parameter of random burst multiple access protocol is designed,and the analysis framework of the protocol is established from the perspective of space by using stochastic geometry.The key performance parameters of the protocol are derived and verified: medium access probability,burst success probability,and then the packet success probability and space throughput are obtained.Based on the proposed theoretical analysis framework,the influence of key system parameters on network performance is evaluated,and the optimal setting method of key parameters is provided under the condition of 99% packet success probability.Specifically,this paper deduces the condition and critical COS threshold that low-priority users and highpriority users can coexist under the guarantee of 99% packet success probability.2.Based on the characteristics of anti-interference and high spatial reuse of directional antennas,the improvement of network performance after the combination of directional antenna and random burst multiple access protocol is explored.Considering the influence of side lobes,an L-lobe generalized directional antenna model is constructed,and combined with the constructed space system model,key performance indicators are deduced: medium access probability,burst success probability,and packet success probability.This paper use three typical directional antenna models: single-lobe directional,double-lobe directional,single-lobe directional & omnidirectional antenna model to verify the correctness of formulas.This paper compares and analyzes the performance of random burst multiple access protocol under three directional antenna models and omnidirectional antenna models.The results show that even when the COS threshold is large,the directional model can more easily achieve a 99% packet success probability.3.In order to analyze the performance of random burst multiple access protocol more comprehensively,the holiday queue is used to analyze the changes of the same priority and different priority queues within the node from the time point of view.Build a vacation queue model.When the high-priority queue in the node is not empty,the low-priority queues are all in the vacation state.Low-priority queues can only be serviced when there are no packets to be sent from high-priority queues.First,the state transition matrix and steady state probability matrix of each priority queue are obtained.Then it is necessary to find out the key variables linking time and space,so as to establish the agreement analysis model of the combination of time and space.According to the established spatio-temporal analysis model,the key protocol performance parameters are deduced and verified.Finally,the influence of the arrival rate of different priority services on the performance of the protocol is analyzed,and it is found that when the arrival rate of low-priority services exceeds a certain threshold,all nodes in the network will always be in the state of data to be sent.There is no impact on protocol reliability.