Study On M2M Random Access Technology Based On LTE Network

Nowadays, Internet of Things are rapidly development, the ultimate goal of developmentis to connect all machines of world as human network. The M2M communications network isa realization of tool and means of communication of the machine, it is bound to introduce aflood of M2M devices, and will appear a large number of M2M business, so,this will give ahuge challenge to network, and resulting in decreasing of access of success rate, throughput,resource utilization and other performance indicators. Therefore, how to improve theseperformance indicators is a study hot-spot for many scholars and experts. This article is basedon the LTE system, throughing depth-understanding to random access protocols, algorithmsand access methods, and introducting M2M random access to explore the impact on thetraditional H2H business.In this paper, The first focus of this paper is about M2M devices and H2H devices ofcompeting random access preamble allocation problem. Firstly, we were analyzed the existingpreamble allocation model, and knew that existing model is not clearing and flexibling toadjustment the preamble number by the situation of access. Points out the effective way toefficient use of random access resources is to improve the flexibility of resourceallocation.Secondly, in terms of the flexibility of the preamble distribution, we suggest aimproved random access preamble allocation model based on resource sharing. The idea isthat when they access network, they firstly use their own dedicated preamble part, if thededicated preamble is not enough, and then use the case of shared preamble. Finally, we givethe method of mathematical analysis model, the simulation results showed that the improvedmodel can effectively improve the system throughput and reduce the waste of networkresources.In this paper, The second focus of this paper is about access success rate of M2Mdevices. Firstly, we analysis the status of M2M business, finding M2M business objectivesand delay is similarities. Due to massive M2M devices random access will bring tocongestion and other factors for LTE system, this will inevitably lead to the original H2Hservices and LTE systems are affected. Therefore, improving the accessof the quality of M2Mdevices is a very important significance. Secondly, from the point of view of M2M groupcharacteristics and delay sensitivity, we suggest a random access model based on M2M groupfeatures. This project have a special treatment to the devices of delay sensitivity highapplication and put the similar sevice of devices divide into one group. Finally, the simulationresults show that the program relative to the traditional scheme can effectively improve thesuccess rate of M2M terminal access, and on the same set of terminal paging through multiplemethods can reduce the access network does not succeed terminal at the first time, and it effectively guarantees the performance of the system.