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An Enhanced DESYNC Scheme for Simple TDMA Systems in Single-Hop Wireless Ad-Hoc Networks

단일홉 무선 애드혹 네트워크에서 단순 TDMA 시스템을 위한 DESYNC 알고리즘 개선 방안

  • 현상현 (대전대학교 정보통신공학과) ;
  • 이제율 (대전대학교 정보통신공학과) ;
  • 양동민 (대전대학교 정보통신공학과)
  • Received : 2014.07.08
  • Accepted : 2014.09.04
  • Published : 2014.09.30

Abstract

TDMA(Time Division Multiple Access) is a channel access scheme for shared medium networks. The shared frequency is divided into multiple time slots, some of which are assigned to a user for communication. Techniques for TDMA can be categorized into two classes: synchronous and asynchronous. Synchronization is not suitable for small scale networks because it is complicated and requires additional equipments. In contrast, in DESYNC, a biologically-inspired algorithm, the synchronization can be easily achieved without a global clock or other infrastructure overhead. However, DESYNC spends a great deal of time to complete synchronization and does not guarantee the maximum time to synch completion. In this paper, we propose a lightweight synchronization scheme, C-DESYNC, which counts the number of participating nodes with GP (Global Packet) signal including the information about the starting time of a period. The proposed algorithm is mush simpler than the existing synchronization TDMA techniques in terms of cost-effective method and guarantees the maximum time to synch completion. Our simulation results show that C-DESYNC guarantees the completion of the synchronization process within only 3 periods regardless of the number of nodes.

Acknowledgement

Supported by : 한국연구재단

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