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Volume 23 Issue 5
September  2008
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Lizhong Dai, Dongmei Zhao. Uplink Scheduling for Supporting Real Time Voice Traffic in IEEE 802.16 Backhaul Networks[J]. Journal of Computer Science and Technology, 2008, 23(5): 806-814.
Citation: Lizhong Dai, Dongmei Zhao. Uplink Scheduling for Supporting Real Time Voice Traffic in IEEE 802.16 Backhaul Networks[J]. Journal of Computer Science and Technology, 2008, 23(5): 806-814.
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Uplink Scheduling for Supporting Real Time Voice Traffic in IEEE 802.16 Backhaul Networks

  • 1Gemini Mobile Technologies, Beijing 100016, China2Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario, Canada

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  • Received Date: September 27, 2007
  • Revised Date: June 24, 2008
  • Published Date: September 09, 2008
    Abstract
  • In this paper we propose simple enhancements to the bandwidth (BW)request messages in IEEE 802.16 for supporting real-time packetvoice traffic. Three different BW request formats are proposed,each requiring a different amount of latency information about thebuffered packets at the SS. On this basis, packet schedulingschemes are proposed for the BS to make resource allocations forreal-time traffic. Our results show that the proposed BW requestand scheduling schemes achieve significantly lower packet lossprobability than the standard IEEE 802.16 BW request with roundrobin scheduling. The results further show that there is anoptimum point about how much delay information the SS shouldreport to the BS in order to best utilize the uplink resourceswhile the SS provides satisfactory real-time performance for the voice traffic.
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    • References (12)
  • [1] IEEE standard for local and metropolitan area networks --- Part 16: Air interface for fixed broadband wireless access systems. IEEE Std 802.16-REVd/D5-2004, May 13, 2004.
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    } Hou F, Ho P H, Shen X, Chen A Y. A novel QoS scheduling scheme in IEEE 802.16 networks. In {\it Proc. IEEE Wireless Communications and Networking Conference (WCNC) 2007}, Hong Kong, March 11--15, 2007, pp.2457--2462.
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    } Lee H, Kwon T, Cho D H. An enhanced uplink scheduling algorithm based on voice activity for VoIP services in IEEE 802.16d/e system. {\it IEEE Communications Letters}, Aug. 2005, 9(8): 691--693.
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    } Zhao D, Shen X. Packet voice transmissions in IEEE 802.16 backhaul networks. {\it IEEE Communication Magazines}, Feb. 2007, 14(1): 44--51.
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    } Anic D {\it et al}. Stochastic theory of a data-handling system with multiple sources. {\it Bell System Technical Journal}, Oct. 1982, 61(6): 1871--1894.
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    } So J W. A downlink performance analysis of VoIP services over an IEEE 802.16e OFDMA system. {\it IEEE Communications Letters}, Feb. 2007, 11(2): 155--157.
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