摘要
针对并行多径传输中服务质量保证问题,提出一种新的路径优化方案.方案以提高网络服务质量并降低网络能耗为优化目标,首先根据路径参数计算每条备用路径的服务质量,并利用能耗模型及已知的备用路径数量计算每条备用路径发送数据和维持路径连接的能耗.然后在二维极坐标系下建立基于服务质量和能耗的路径评价模型,并结合所需路径数利用二分法在极坐标系下搜索出一组相应数量的服务质量高且能耗小的路径作为活跃路径.仿真结果显示,本方案与使用路径质量评估模型的并行多径传输(CMT-PQEM)方案相比,降低了能耗与重传概率,从而可提高网络吞吐量,延长网络生存时间.
Aiming at the problem of service quality assurance in Concurrent multipath transfer （CMT）, a new path optimization scheme is proposed, which can improve the quality of network service and reduce the network energy consumption. First, calculating the quality of service based on the path parameters and the energy consumption of sending data and maintaining the path connection according to the energy consumption model and the number of alternate paths for each alternate path. Then, a model for path evaluation is estab- lished in the two-dimensional polar coordinate system on account of the quality of service and energy consumption, and a correspond- ing number of active paths are searched out in the polar coordinate system by using the dichotomy method which have high quality of service and low energy consumption. Simulation results demonstrate that the proposed scheme can reduce the energy consumption and retransmission probability compared with the CMT scheme （CMT-PQEM ） which use the path quality evaluation model, which can improve the network throughput and prolong the network lifetime.
出处
《小型微型计算机系统》
CSCD
北大核心
2018年第3期503-507,共5页
Journal of Chinese Computer Systems
基金
河北省自然基金项目(F2014201168)资助
关键词
异构网络
并行多径传输
服务质量
能耗
极坐标系
heterogeneous network
CMT
quality of service
energy consumption
polar coordinates
