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基于网络层路由协议的缺省单一路径难以满足高带宽应用的端到端传输需求,多径传输是一种有效方式。在基于应用层中继的多径传输系统的基础上,提出基于应用层流量优化的中继路径选择方案:借助于应用层流量优化机制,提出中继路径选择过程中遵循的规则,提出基于运营商定义域的最优中继路径生成算法,为数据传输分配优质的中继路径,同时在运营商定义域之间以及中继服务转发器之间保持负载均衡。仿真结果表明,提出的方案在选择优质中继路径方面具有较优性能,同时能够灵活地均衡运营商定义域之间的负载。
The default single path based on the network layer routing protocol is difficult to meet the end-to-end transmission needs of high bandwidth applications. Multipath transmission is an effective way. Based on the multipath transmission system based on application layer relay, a relay path selection scheme based on application layer traffic optimization is put forward. By means of application layer traffic optimization mechanism, the rules to be followed in relay path selection process are proposed, An optimal relay path generation algorithm for a provider domain allocates good relay paths for data transmission while maintaining load balancing between operator domains and between relay services forwarders. The simulation results show that the proposed scheme has better performance in the selection of high-quality trunk paths and the flexibility to balance the load among operators’ domains.