Research On M2M Random Access Control Algorithms

In recent years,with the growing maturity of cellular network technology and low power wide area network technology,communications between Machine to Machine has been developed rapidly,and various M2 M service applications have emerged as the times require.However,due to the large number of M2 M communication terminals,when a large number of M2 M terminals launch random access requests at the same time,they will inevitably cause collision and collision,network congestion and excessive delay.In order to solve these problems,this paper proposes various M2 M random access control algorithms.From the aspect of access rate and delay,we use packet and dynamic allocation of resources to improve access rate,reduce delay and energy consumption.This paper mainly studies the following three aspects:(1)An algorithm based on M2 M terminal group random access control is proposed.The machine terminals are grouped according to the speed of energy consumption,and the priority is set to the group.The faster the consumption of energy is,the higher the priority is.The group with the highest priority assigns priority to the random access resources.The simulation shows that this method can effectively reduce the blocking rate,reduce the delay,improve the terminal access rate and access energy efficiency.(2)A M2 M random access control algorithm based on the Markoff model is proposed.The Markov chain model is used to estimate the number of terminals that initiate the access request,and the backoff mechanism is used to maximize the limited random access resources to allocate the M2 M terminals that initiate the access requests.The simulation shows that this method can effectively reduce the blocking rate,reduce the delay,improve the terminal access rate and access energy efficiency.(3)The design and implementation of a Lora based experimental verification system for random access control(random access control)is designed and implemented.This system mainly realizes the Lora terminal to collect the cell temperature and humidity and uploaded to the Lora gateway,Lora gateway implementation of access control,resource allocation and other functions,and the information is uploaded to the service server.It is proved that the performance of the experimental system is stable.