Uplink and downlink scheduling for point to multipoint WiMAX Networks

Mohammad Hayajneh, Najah Abu Ali, Issa Khalil

Research output: Contribution to journalArticle

3 Citations (Scopus)


IEEE 802.16 standard lacks a Media Access Control (MAC) scheduling architecture to enforce Quality of Service (QoS) requirements of different services classes. In this paper, we propose an opportunistic and optimized scheduler that meets connections' QoS requirements while it pledges fairness among admitted connections. Our approach involves separating the scheduling problem into two sub-problems. In the first sub-problem, which addresses interclass time-slots allocation, the proposed scheduler calculates the optimum number of time-slots in each time frame corresponding to the service classes with the objective of minimizing the blocking probability of each class. In the second sub-problem, the intraclass slot allocation problem, time-slots for each class are allocated using an integrated cross-layer priority functions (PFs) that provide proportional fairness among a class connections. The simulation results reveal that the proposed scheduler realizes our objectives, and provides efficient QoS scheduling without starving the connections of the BE class.

Original languageEnglish
Pages (from-to)1231-1242
Number of pages12
JournalWireless Communications and Mobile Computing
Issue number9
Publication statusPublished - 1 Sep 2009
Externally publishedYes



  • Access networks
  • QoS
  • RRM
  • Scheduling
  • WiMax

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Information Systems

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