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| 摘要: |
| 在分析无线Ad Hoc网络资源分配模型的基础上,提出一种QoS感知的跨层资源分配算法CL-QARA (cross layer QoS aware resource allocation).其主要思想是,引入价格作为资源分配的度量指标,以QoS带宽需求为参数,将网络层的动态资源分配信息与MAC层CSMA/CA接入机制相结合,以改进MAC层的冲突退避算法.设计了改进的退避算法和呼叫接入控制算法,以实现MAC层与网络层的跨层技术.通过QoS感知的资源分配算法和跨层技术协同工作,为QoS服务提供了业务保障.仿真结果表明,CL-QARA算法具有良好的收敛性和稳定性.与其他算法相比,CL-QARA能够有效地提供QoS保证,提高了网络的效用和性能. |
| 关键词: 资源分配 Ad Hoc网络 服务质量 跨层技术 价格 |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60903027, 70701018, 70971068 (国家自然科学基金); the Jiangsu Provincial Natural Science Foundation of China under Grant Nos.BK2007593, BK2009396 (江苏省自然科学基金); the National Science Foundation of Jiangsu Higher Education Institutions of China under Grant No.10KJB520008 (江苏省高校自然科学研究项目) |
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| QoS-Aware Cross Layer Resource Allocation Algorithm in Wireless Ad Hoc Networks |
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HAN Bing-Qing, ZHANG Hong, LIU Feng-Yu, CHEN Wei
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| Abstract: |
| Based on analyzing the resource allocation model in wireless Ad Hoc networks, a QoS-aware cross layer resource allocation algorithm, CL-QARA (cross layer QoS aware resource allocation) algorithm, is proposed. The purpose of CL-QARA algorithm is to introduce price and QoS bandwidth to measure resource allocation. The dynamic resource allocation information in the network layer is combined with the CSMA/CA admission control in the MAC layer to improve the backoff algorithm. A new backoff algorithm and call admission control algorithm is designed to implement a cross layer technique between the MAC layer and network layer. The QoS-aware resource allocation algorithm cooperates with the cross layer technique to provide the QoS guarantee. The simulation results show that CL-QARA has good convergence and stability. Compared to other algorithms, CL-QARA provides better QoS guarantee. CL-QARA also improves the network utility and performance. |
| Key words: resource allocation ad hoc network QoS cross-layer technique price |
