移动自组织网络中基于QoE的跨层多波束信道接入机制

引入数字多波束技术可以使移动自组织网络的信道容量得到有效提升，然而，时间、频率、空间、用户、功率等多维度资源域的统一调度与跨层联合优化使得信道接入机制的分析与设计变得更加复杂。为此，结合多波束的特性，将波束宽度限制、收发限制、通道限制、功率限制等多种约束条件抽象图论问题，并建立分析模型。基于分析模型，进一步提出了MB-MAC（Multi-beam Medium Access Control）信道接入机制，结合物理层的预编码技术，建立定向链路的队列模型，度量用户的满意度(Quality of Experience,QoE)，设计了适用于自组织网络中多用户并发并收的信道接入机制，兼顾了网络容量和用户满意度。仿真结果表明，MB-MAC机制能在保证各个用户满意度的情况下，有效提升网络吞吐率。

A QoE-based cross layer multi-beam MAC scheme for mobile ad hoc networks

The capacity of mobile ad hoc networks has been tremendously improved by introducing the digital multi-beam technology.However,the scheduling of multiple domain resources such as time,frequency,space,user,power and the cross-layer joint optimization make the analysis and the design of media access control(MAC) scheme become complex and difficult.For this reason,the analysis model is built by converting multiple restrict conditions to the graph theory problem.Then,a multi-beam MAC(MB-MAC) scheme is proposed for the concurrent transmission of multiple users,in which the quality of experience(QoE) of users is defined in consideration of pre-coding and data queuing.Simulation results demonstrate the effectiveness and fairness of the proposed MAC scheme in terms of QoE and throughput.