title: Dynamic RACH Partition for Massive Access of Differentiated M2M Services.
abstract: In machine-to-machine (M2M) networks, a key challenge is to overcome the overload problem caused by random access requests from massive machine-type communication (MTC) devices. When differentiated services coexist, such as delay-sensitive and delay-tolerant services, the problem becomes more complicated and challenging. This is because delay-sensitive services often use more aggressive policies, and thus, delay-tolerant services get much fewer chances to access the network. To conquer the problem, we propose an efficient mechanism for massive access control over differentiated M2M services, including delay-sensitive and delay-tolerant services. Specifically, based on the traffic loads of the two types of services, the proposed scheme dynamically partitions and allocates the random access channel (RACH) resource to each type of services. The RACH partition strategy is thoroughly optimized to increase the access performances of M2M networks. Analyses and simulation demonstrate the effectiveness of our design. The proposed scheme can outperform the baseline access class barring (ACB) scheme, which ignores service types in access control, in terms of access success probability and the average access delay.
authors.affiliation: Department of Information and Communications Engineering, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China. duqinghe@mail.xjtu.edu.cn.|Shaanxi Smart Networks and Ubiquitous Access Research Center, Xi'an 710049, China. duqinghe@mail.xjtu.edu.cn.
authors.forename: Qinghe
authors.initials: Q
authors.lastname: Du
authors.affiliation: Department of Information and Communications Engineering, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China. liwanyu@stu.xjtu.edu.cn.
authors.forename: Wanyu
authors.initials: W
authors.lastname: Li
authors.affiliation: Department of Electrical Engineering and Computer Science, the University of Kansas, Lawrence, KS 66045, USA. lingjialiu@ittc.ku.edu.
authors.forename: Lingjia
authors.initials: L
authors.lastname: Liu
authors.affiliation: Department of Information and Communications Engineering, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China. pyren@mail.xjtu.edu.cn.
authors.forename: Pinyi
authors.initials: P
authors.lastname: Ren
authors.affiliation: Department of Information and Communications Engineering, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China. wangyichen0819@mail.xjtu.edu.cn.
authors.forename: Yichen
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Information and Communications Engineering, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China. lisun@mail.xjtu.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Sun
keywords: M2M communications; access success probability; average access delay; overload control; preamble partition