关键词: 长期演进, 可变服务速率, 服务器共享, 机器对机器

Abstract:

A packet-level variable service rate queuing system is established to model the process that the long-term evolution (LTE) network works for heterogeneous services traffic. The system reflects packets switching and variable service rate of LTE. The main research target is to explore the way that heterogeneous services share a common server. Heterogeneous services can be divided into two types, human to human (H2H) services and machine to machine (M2M) services. Based on network of LTE and its service characteristics, two queuing models MMPP/M/1/K_M+ARQ and M/M/1/K_H are established to depict different LTE network services under M2M and H2H traffic arrival respectively. Two kinds of services sharing the same server and the service process are controlled by the queue length threshold of H2H queue. The average service rate changes exponentially or in a linear fashion, while the total service rate remains constant. By deducing three-dimensional Markov chain and generator matrix of queuing system, the queuing model is solved. Algorithm simulation shows the system performance in several circumstances, including different service modes and different burst features of M2M arrival.

Key words: long-term evolution, variable service rate, processor sharing, machine to machine