Distributed flexible channel assignment in WLANs

Chih Cheng Hsu, Yi An Liang, Jose Luis Garcia Gomez, Cheng Fu Chou, Ching-Ju Lin

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

5 Scopus citations


Flexible channels enable Access Points (AP) and clients to determine channel widths and their center frequencies. The key challenge in flexible channels is how to determine proper channel width and center frequency for each link demands such that the overall system throughput could be improved. In this work, we introduce a distributed flexible channel assignment algorithm, DFCA. Different from prior researches, DFCA does link-based channel assignment instead of AP-based or packet-based. This is because that the packet-based method could incur heavy overhead, while the AP-based method is not able to determine the interfering relation between links precisely. In addition, the transmission weight of a link is proposed; with the help of the transmission weight, channel width, center frequency and interference relation to neighboring nodes, DFCA is able to accurately predict that link throughput prior to the channel assignment. Results show that DFCA could outperform traditional fixed channel assignment approaches and the AP-based flexible channel assignment algorithm. Even compared with FLUID[1], which is a packet-based channel assignment approach with assist of a central controller, DFCA is able to achieve comparable (at least 93%) throughput by using only local information rather than global knowledge.

Original languageEnglish
Title of host publication2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Number of pages6
StatePublished - 21 Aug 2013
Event2013 IEEE Wireless Communications and Networking Conference, WCNC 2013 - Shanghai, China
Duration: 7 Apr 201310 Apr 2013

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511


Conference2013 IEEE Wireless Communications and Networking Conference, WCNC 2013


  • adaptive channel width
  • channel assignment
  • flexible channel
  • wireless LANs

Fingerprint Dive into the research topics of 'Distributed flexible channel assignment in WLANs'. Together they form a unique fingerprint.

Cite this