The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Automatic Beacon Alignment Schemes Based on Short Address for WPANs

WPAN망에서의 Short Address 값을 이용한 자동 비컨 프레임 정렬 방법

  • 전종근 (한국항공대학교 정보통신공학과) ;
  • 윤종호 (한국항공대학교 정보통신공학과 응용네트워크 연구실) ;
  • 김세한 (한국전자통신연구원)
  • Published : 2007.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

There nay be collisions among beacons from several full function devices in IEEE 802.15.4 sensor networks. These collision of beacons may cause devices to lose time synchronization, and thus be unable to association. To solve this problem, the IEEE 802.15.4b defines a new Post Beacon Period(PBP), but it does not still alleviate the beacon collision problem. In this paper, we propose two automatic beacon alignment schemes that a node itself can decide its beacon start time using its short address that has been assigned during association. We also simulate and investigate our proposed automatic beacon collision avoidance schemes using NS-2 simulator.

센서 네트워크를 위한 IEEE 802.15.4표준에서는 여러 개의 Full Function Device(FFD)들이 독립적으로 송신하는 비컨들간의 충돌 현상이 존재한다. 이러한 비컨의 충돌은 디바이스간의 타임 동기를 잃게 할 뿐만 아니라, 통신 불능 상태까지 이르게 한다. 이를 개선하기 위해IEEE 802.15.4b 표준안에서는 Post Beacon Period(PBP)를 추가로 정의하여 사용하지만, 역시 다단 토폴로지에서는 비컨충돌의 가능성이 존재할 수 있다. 본 논문에서는 이러한 비컨 충돌의 문제점을 해결하기 위해 FFD가 최초 결합 절차 시 코디네이터가 할당하는 Shor Address 값을 이용하여 비컨 송신 시기를 스스로 결정하는 새로운 비컨 정렬 방식을 제시하였으며, NS-2를 이용하여 제시된 방식의 비컨 충돌 회피 과정을 모의 실험하였다.

Keywords

References

  1. IEEE802.15.4 Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements Part 15: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specificationsfor Low-Rate Wireless Personal Area Networks (LR-WPANs), 2003
  2. IEEE802.15.4b Draft Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements Part 15: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (LR-WPANs), 2005
  3. NS2 Simulator, http://www.isi.edu/nsnam/ns/
  4. J. Schiller, 'Mobile Communications', Addison-Wesly, 2000
  5. Jianliang Zheng and Myung J. LEE, 'A Comprehensive Performance Study of IEEE 802.15.4', IEEE Press Book, 2004
  6. Tony Sun, Ling-Jyh Chen, 'Measuring Effective Capacity of IEEE 802.15.4 Beaconless Mode', IEEE DRAFT, August, 2005
  7. Mario Neugebauer, 'A New Beacon Order Adaptation Algorithm for IEEE 802.15.4 Networks', IEEE Conference Proceeding, 31 Jan.-2 Feb. 2005
  8. MeshDynamics, Beacon Alignment White Paper. http:// www.meshdynamics.com
  9. Jaeyeol Ha, Wook Hyun Kwon, 'Feasibility Analysis and Implementation of the IEEE 802.15.4 Multi-hop BeaconEnabled Network', JCCI, 2005
  10. Li-chun Ko , 'Design and implementation of IEEE 802.15.4 beacon-enabled network devices', IEEE Conference Proceeding, 13-17 March 2006