An adaptive bandwidth request scheme for QoS Support in WiMAX polling services

Cheng Yueh Liu*, Yaw-Chung Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

IEEE 802.16, also called WiMAX was developed to accommodate large coverage and high bandwidth last-mile Internet access. In WiMAX, provisioning of QoS is still an important issue. Before transmitting packets, subscriber stations (SS) must send a bandwidth request message to the base station (BS). If available bandwidth is not sufficient to use unicast polling for each SS to send bandwidth request, the BS will form a group of stations that utilize multicast and broadcast polling to contend the slots for transmitting bandwidth request. Since extended real-time polling service (ertPS) proposed in 802.16e has strict delay time requirement, the lower the delay, the better the QoS. In order to reducing the delay caused by collisions of request packets, we proposed a scheme that utilizes contention-free period to allocate slots for bandwidth request. Both mathematic analysis and simulation results show that our scheme features lower delay and better QoS performance for ertPS flows as the number of stations increases.

Original languageEnglish
Title of host publicationProceedings - The 28th International Conference on Distributed Computing Systems Workshops, ICDCS Workshops 2008
Pages60-65
Number of pages6
DOIs
StatePublished - 22 Sep 2008
Event28th International Conference on Distributed Computing Systems Workshops, ICDCS Workshops 2008 - Beijing, China
Duration: 17 Jun 200820 Jun 2008

Publication series

NameProceedings - International Conference on Distributed Computing Systems

Conference

Conference28th International Conference on Distributed Computing Systems Workshops, ICDCS Workshops 2008
CountryChina
CityBeijing
Period17/06/0820/06/08

Keywords

  • Bandwidth request
  • Contention period
  • IEEE 802.16
  • QoS
  • WiMAX

Fingerprint Dive into the research topics of 'An adaptive bandwidth request scheme for QoS Support in WiMAX polling services'. Together they form a unique fingerprint.

Cite this