基于能量效率的协作车联网技术研究

发布时间：2018-03-08 22:17

本文选题：车载自组网　切入点：命名数据网络　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：当今，车载自组网，不管是在科研领域还是工业领域，都受到了越来越多的关注，特别在智能交通系统中，受到的关注尤其明显。为了建设更为安全的道路交通和更智能的车辆基础设施，我们可以通过车辆收集信息来管理交通，减少拥堵。无线节点在通信和收集数据上起到关键性的作用，一般无线节点集成在每辆车上以及路边。显然，，车上的无线节点是可以随时被车载电池充电的，但是路边的无线节点在长时间内是不能被充电的。我们需要解决的问题是，怎么延长整个网路的寿命。另外，当大量的汽车同时收集信息时，网络服务器过载也是车载自组网需要解决的一个问题。本文利用命名数据网络和合作通信技术来解决上面提出的问题。通过命名数据网络很容易获取中间网络设备的缓存。从而，我们可以通过减少服务器发送的比特数来节约整个车载网的能耗。另外，减少服务器发送的比特数还可以减少数据包的往返时间和服务器缓存。同时，当车载网过载时，可以避免拥堵。另一方面，通过对比不同的合作通信方式，例如多跳传输，中继技术和MIMO，我们可以选择出车载网中关于能耗的最优合作策略。通过OPNET仿真表明，能耗随着车辆数量的增加而增加。通过Matlab仿真，我们选择出了最优的合作通信策略。
[Abstract]:Nowadays, more and more attention has been paid to vehicular ad hoc networks, whether in the field of scientific research or industry, especially in intelligent transportation systems. The attention is particularly obvious. In order to build safer road traffic and smarter vehicle infrastructure, we can manage traffic by collecting information from vehicles. Reduce congestion. Wireless nodes play a key role in communication and data collection. Wireless nodes are integrated into each vehicle and on the roadside. Obviously, the wireless nodes on the vehicle can be recharged by the battery at any time. But the wireless nodes on the side of the road can't be recharged for a long time. The problem we need to solve is how to extend the lifetime of the entire network. Besides, when a lot of cars collect information at the same time, Network server overload is also a problem that needs to be solved. This paper uses named data network and cooperative communication technology to solve the above problem. It is easy to get cache of intermediate network device through named data network. In addition, reducing the number of bits sent by the server can also reduce the round-trip time and server cache of data packets. At the same time, when the on-board network is overloaded, we can reduce the energy consumption of the whole vehicle network by reducing the number of bits sent by the server. On the other hand, by comparing different cooperative communication methods, such as multi-hop transmission, relay technology and Mimo, we can choose the optimal cooperative strategy about energy consumption in vehicular network. The OPNET simulation shows that, The energy consumption increases with the increase of the number of vehicles. Through Matlab simulation, we choose the optimal cooperative communication strategy.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;TP391.44;TN929.5

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