in Computer and Information Sciencessssss.pdfVIP

COMMUNICATIONS SYSTEM DESIGN Rate Allocation Scheme for Machine-to-Machine Service Based on 3GPP in Heterogeneous Wireless Networks 1 1 2 1 HUANG Yao , TIAN Hui , ZHANG Jie , QIN Cheng 1Key Laboratory of Universal Wireless Communications, Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China 2Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, UK Abstract: In this study, an explicit adaptive tr- (RAN) cannot meet M2M communications. affic allocation scheme for Machine-to-Mach- It is known that one of the most important ine (M2M) service is proposed to achieve op- features of next generation wireless networks timum distribution in heterogeneous networks. is heterogeneous radio environment, which Based on the characteristics of M2M services, means several disparate wireless networks in the presented scheme is formulated as a con- the same cell, such as WLANs, GPRS, and vex optimization problem that maximises the UMTS. M2M services also can be transmitted utility of the M2M service, and then determi- by multiple RANs. In this way, it will effec- nes how to allocate the total rate among the tively reduce the load of single RAN and im- multiple access networks. The analysis and nu- prove radio resource utilization. merical simulations indicate that the proposed Currently, a few schemes have been pro- scheme makes a significant improvement in per- posed for M2M communications. Ref. [4] pre- formance compared with the traditional sch- sented an overview of the potential and chal- emes.