宽带电力线通信跨层资源分配研究

发布时间：2018-04-28 20:34

本文选题：宽带电力线 + OFDM　；参考：《华北电力大学(北京)》2014年硕士论文

【摘要】：宽带电力线通信技术作为用户接入方案之一,具有速率高、成本低廉、接入方式灵活等特点,国内外都开展了很多研究。正交频分复用(OFDM)技术由于其良好的抗噪声、抗多径衰落能力,以及自适应调制特性,被广泛应用于宽带电力线通信系统中。在宽带电力线通信系统中采用动态资源分配技术,可以为用户动态分配系统资源,提高系统吞吐量和用户服务质量。论文结合用户服务质量、信道质量等因素,对宽带电力线通信跨层资源分配进行了研究。论文首先根据用户服务质量要求为用户划分优先级,提出一种基于用户优先级调度的宽带电力线跨层资源分配算法。算法依据用户优先级不同设定不同级别的效用函数来确定用户调度顺序,并通过用户服务质量确定该调度周期内用户调度分组数。算法在物理层采用等功率资源分配。针对非实时用户吞吐量公平性,论文还提出一种基于非实时用户公平性的宽带电力线跨层资源分配算法。算法综合了影响非实时用户公平性的因素来设计调度效用函数,并确定各用户调度数据包数量,先调度实时用户,后调度非实时用户。在物理层算法采用改进的等功率资源分配方法。算法在典型电力线信道环境下进行了仿真分析,实验结果符合理论预期要求,提高了电力线系统资源分配综合性能。
[Abstract]:As one of the user access schemes, broadband power line communication technology has many characteristics, such as high speed, low cost, and flexible access. OFDM (orthogonal frequency division multiplexing) technology is widely used in broadband power line communication system because of its good anti noise, multi-path fading ability and self adaptive modulation characteristics. In the broadband power line communication system, dynamic resource allocation technology is used to dynamically allocate system resources for users, improve system throughput and user service quality. This paper studies the cross layer resource allocation of broadband power line communication based on user service quality and channel quality. First, the thesis is based on user service quality. In order to prioritize users, a cross layer resource allocation algorithm for broadband power lines based on user priority scheduling is proposed. The algorithm determines the order of user scheduling based on different user priorities, and determines the number of scheduling groups within the adjustment cycle through user service quality. The algorithm is physical. The layer uses equal power resource allocation. Aiming at the fairness of non real-time user throughput, this paper also proposes a cross layer resource allocation algorithm based on non real time user fairness. The algorithm combines the factors that affect the fairness of non real-time users to design the scheduling utility function, and determine the number of scheduling data packets for each user, scheduling the actual data first. In the physical layer algorithm, the improved equal power resource allocation method is used in the physical layer algorithm. The algorithm is simulated and analyzed in the typical power line channel environment. The experimental results conform to the theoretical expectation and improve the comprehensive performance of the power line system resource allocation.

【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.853

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