Earticle

초록

영어

IEEE 802.11 wireless local area networks (WLAN) have been widely deployed, and many applications are implemented on WLAN. As one of the interesting wireless services, wireless voice over internet protocol (VoIP) can provide low-cost real-time voice service to mobile users. But the IEEE 802.11 wireless network cannot satisfy the QoS of VoIP. The delay during handoff process can last up to 1 second. Applications with delay restraint like VoIP will drop the call when the delay is more than 50 ms. Therefore this paper analyzed the delay made by the handoff process, and proposed a pre-scanning fast handoff scheme. This fast handoff scheme is based on selective scanning and caching. It can predict the next AP for STAs and use pre-scanning before the handoff is triggered. Simulations on OPNET show this proposed scheme can reduce the average handoff delay to 23.45 ms and avoid some unnecessary handoffs. The pre-scanning fast handoff scheme is feasible and economical according to its performance in the handoff process.

목차

Abstract
 1. Introduction
 2. Background and Related Work
 3. Pre-scanning fast handoff scheme
  3.1. Scanning Trigger
  3.2. Channel Scanner
  3.3. Handoff Trigger
  3.4. Caching
 4. Simulation and Results Analysis
  4.1. Simulation Environment
  4.2. Simulation Results
 5. Conclusion
 Acknowledgements
 References

키워드

저자

• Jun Xiao [ School of Computer and Information Technology, Beijing Jiao tong University ]
• Feng Liu [ School of Computer and Information Technology, Beijing Jiao tong University ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Future Generation Communication and Networking

• 간기

  격월간

• pISSN

  2233-7857

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605