高容量无线自组织联网技术的研究

Wireless ad hoc networks are infrastructurless wireless networks which are self-organized in a multi-hop manner. They have a wide variety of potential applications because of the easiness in deployment and the flexibility in organizing. High-capacity wireless ad hoc networking is a challenging open issue. With the purpose of exploring practical methods for wireless ad hoc networking, we try to offer an answer to the following question: As a node forwarding a data packet in a wireless ad hoc network, in order to achieve high capacity, at what time, over which channel, at what power level and to what node should the data be sent? This question will be answered in terms of theory, algorithm and protocol, respectively. At the theory level, we will further the fundamental understanding of network capacity. At the algorithm level, we will carry out a full-scale investigation of medium access control, channel allocation, power control, transmission scheduling, and so on. At the protocol level, we will implement multiple high-capacity networking technologies into MAC protocols. Through the research on theories, algorithms, and protocols for high-capacity ad hoc networking, we hope to drive the research and application of wireless ad hoc networks.

无线自组织网络是一种无基础设施、以自组织和多跳方式形成的无线网络，因其部署便捷、组网灵活的特点而具有广阔的应用前景。高容量无线自组织联网是一个具有挑战性的、尚不成熟的重要研究课题。本项目以探索实用的高容量无线自组织联网技术为目标，力图从基础理论、算法和协议三个层面上回答这样一个问题：为了高效地获得高容量，无线自组织网络的节点在发送数据时，应该在什么时候、通过什么信道、以多大的发送功率、传送给哪个节点？为了回答这个问题，本项目在基础理论层面上，将深化对网络容量的定量认识，认清各种因素对网络容量的影响；在算法层面上，将全面地研究介质访问、信道分配、功率控制和传输调度等高容量算法；在协议层面上，将以MAC协议为中心，综合实现各种高容量联网技术。本项目通过对高容量自组织联网的理论、算法和协议的研究，力争进一步推动无线自组织网络的研究与应用。

无线自组织网络是一种没有基础设施的、以自组织和多跳方式形成的无线网络。由于部署便捷和组网灵活的特点，无线自组织网络具有广泛的应用前景。高容量无线自组织联网是一个具有挑战性的研究课题。我们的贡献可以概括为以下几点：.(1)在把干扰从本质上看成噪声的假设下，我们给出了无线自组织网络容量的下界。.(2)基于经典的控制理论，我们提出了一种分布式比例积分功率控制算法，它可以嵌入到基于表的路由协议中。.(3)我们得出了这样的结论：在无线通信中，12分贝信噪比可以使能量效率最大化，此时的比特率约为每赫兹4比特/秒。