围绕如何提高无线自组织网络（Ad Hoc）吞吐量，相对于传统基于码率控制机制，提出基于传输功率和传输码率联合控制的方法，研究了基于物理层纯ALOHA协议的Ad Hoc网络在不同传输功率和传输码率条件下的容量，构建多码率控制Ad Hoc数学模型，讨论模型中不同参数的具体计算方法，通过对链路增益函数的简化近似，计算并修正了网络吞吐量的表达式。分别对含有200个节点和100个节点的Ad Hoc网络进行OPNET仿真，结果表明理论与仿真曲线十分接近，证明建立的系统模型很好地反映了网络吞吐量随传输功率的变化关系。%To improve the network throughput of Ad Hoc,corresponding to the traditional code rate control method,the combined control method based on transmission power and transmission code rate is proposed. The capacity of Ad Hoc network under the conditions of different transmission power and transmission code rate based on the pure ALOHA protocol of the physi⁃cal layer is discussed. The Ad Hoc mathematical model with multi⁃code rate control is built. The calculating method of the pa⁃rameters in model is discussed. The expression of the network throughput is calculated and revised by simplification and approxi⁃mation of the link gain function. OPNET simulation for Ad Hoc network with 200 nodes and 100 nodes was performed separate⁃ly. The result indicates that the simulation curves are close to the theoretic curves,and proves that the system model can reflect the aviation of the network throughput with the transmission power quite well.
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