Uplink Scheduling for Supporting Real Time Voice Traffic in IEEE 802.16 Backhaul Networks |
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Authors: | Lizhong Dai Dongmei Zhao |
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Affiliation: | (1) Gemini Mobile Technologies, Beijing, 100016, China;(2) Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario, Canada |
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Abstract: | In this paper we propose simple enhancements to the bandwidth (BW) request messages in IEEE 802.16 for supporting real-time
packet voice traffic. Three different BW request formats are proposed, each requiring a different amount of latency information
about the buffered packets at the SS. On this basis, packet scheduling schemes are proposed for the BS to make resource allocations
for real-time traffic. Our results show that the proposed BW request and scheduling schemes achieve significantly lower packet
loss probability than the standard IEEE 802.16 BW request with round robin scheduling. The results further show that there
is an optimum point about how much delay information the SS should report to the BS in order to best utilize the uplink resources
while the SS provides satisfactory real-time performance for the voice traffic.
Electronic supplementary material
The online version of this article (doi: ) contains supplementary material, which is available to authorized users.
This work is supported by Natural Sciences and Engineering Research Council of Canada under Grant No. 5-43990. |
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Keywords: | scheduling real-time traffic packet voice IEEE 802 16 |
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