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The Research on Cross-Layer Resource Allocation Based on Optimization Collaboration in Wireless Ad Hoc Network

Author: FengXiaoYan
Tutor: GuoSongTao
School: Chongqing University
Course: Computer System Architecture
Keywords: Resource allocation Network utilization ( utility ) Network lifetime Cross-layer technology Convex Optimization
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 0
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Abstract


Wireless Ad Hoc Networks do not need any infrastructure support, self-organizing network without a central base station, which is also an anytime, anywhere to build communication system of autonomous networks. As wireless network resources (such as spectrum and power) is limited users to share these resources, which requires network resources must be reasonable and effective configuration. The allocation of resources is reasonable to see whether a conflict occurs between those users using the allocated resources, and interfering with each other's communications and lead to the congestion of the link. In addition, due to the wireless Ad Hoc network node by portable devices, the energy of these devices is usually limited battery energy supply, network power is also very important. This paper is based on these circumstances. Network congestion control and network resource allocation is complementary. Mainly due to the occurrence of the congestion of the wireless network is a network resource allocation unreasonable result, even if some network resources has been fully guaranteed, but due to the presence of interference between the radio link, the data transfer is still not successful. Design resource allocation strategies to control the occurrence of congestion has important research value. In this paper, based on the rate of node function to maximize network utilization and minimize power consumption optimization model, considering the allocation of these resources link transmission power of the physical layer and the MAC (Media Access Control) layer link transmission time to adjust the sending rate of the source node, which can control network congestion, efficient use of network resources, and ultimately achieve network utilization to maximize and minimize power consumption of the network as a whole between the compromise. Verified by simulation under the conditions to meet the quality of service requirements, the proposed resource allocation algorithm can save network power consumption, to improve the overall performance of the network. Due to the energy of the network is limited, so you should try to save the energy consumption of the network. Thus, the first shows the close relationship between the transmission rate of the energy consumption of network node, and then proposed to maximize network utilization function node transmission rate and network life function joint optimization model, in order to achieve the transport layer The rate control, competition in the MAC layer control and node energy consumption restrictions. This paper uses the theory of convex optimization, optimization of the optimization problem is broken down into a number of sub-problems, one by one to solve each sub-problem is on a network resource configuration, and then propose a distributed algorithm. Real-time interaction, through the link congestion costs and energy cost of the node to make the right decisions in a timely manner so that each sub-problem. Network utilization and network lifetime are two conflicting indicators, but that the proposed algorithm can achieve a balance between the network utilization and network lifetime maximization. Finally, this paper, through a simple wireless Ad Hoc network simulation experiments to verify the effectiveness and the convergence of the distributed algorithm proposed by this paper.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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