ARQ block size and transmission window size based downlink proportional fair resource allocation in IEEE 802.16e
碩士 === 國立交通大學 === 電信工程研究所 === 99 === Because of the rapidly growing demand of high quality service over wireless networks, broadband wireless access becomes so important. Since the bandwidth is very precious, the resource should be allocated properly to satisfy the users' demand and keep it fai...
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| Format: | Others |
| Language: | en_US |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/69757551348450116358 |
| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 99 === Because of the rapidly growing demand of high quality service over wireless networks, broadband wireless access becomes so important. Since the bandwidth is very precious, the resource should be allocated properly to satisfy the users' demand and keep it fair at the same time. The existing algorithm for proportional fairness is a resource allocation scheme to find a balance between system efficiency and fairness among users. In IEEE 802.16e, the automatic repeat request (ARQ) scheme is used to retransmit data received with error in the media access control (MAC) layer. The granularity of the resource becomes a problem if the connections in the system are all ARQ enabled. In this thesis, we study the problem of resource allocation considering ARQ block size and transmission window size. We propose three different algorithms to address the problem and compare their performances with that of non-ARQ based proportional fair scheme. Simulation results show that the three proposed schemes perform differently for different cases and, in most cases their performances are close to that of the non-ARQ based scheme. The third scheme is more robust.
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