Fast Uncontrolled Handover scheme for WiMAX: Infrastructure networks

Yu Hsiang Lin*, Po Wen Chi, Ching Lun Lin, Wei Chih Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Worldwide interoperability for microwave access (WiMAX) is a wireless WAN technology with high data rate and is a candidate for the 4G network trying to provide users with mobile service. To alleviate frame loss during handover, WiMAX provides the Uncontrolled Handover for this potential problem. However, in the Uncontrolled Handover, the target Base Station (BS) needs to retrieve the information of Mobile Station from the Serving BS and the authenticator, respectively. To make matters worse, the MAC context retrieval, the AK context retrieval and the DP registration procedure are performed one after another. Therefore, the latency of the Uncontrolled Handover may be very large and may not meet the QoS requirement of some ongoing delay-sensitive services. In this paper, we propose a fast Uncontrolled Handover scheme that can minimise handover messages and accelerate handover procedure. The performance analysis shows that our scheme outperforms the NWG 1.0.0 and NWG 1.2 in average transmission delay. Besides, our scheme is compatible with the NWG specification.

Original languageEnglish
Pages (from-to)237-251
Number of pages15
JournalInternational Journal of Autonomous and Adaptive Communications Systems
Issue number3
Publication statusPublished - 2011 Jun
Externally publishedYes


  • Context function
  • Handover
  • WiMAX
  • Worldwide interoperability for microwave access

ASJC Scopus subject areas

  • General Computer Science
  • Electrical and Electronic Engineering


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