异构网络中保障业务QoS的TCP协议研究

Research on TCP protocol of QoS in heterogeneous network

摘要:

当TCP协议应用于异构网络时业务的QoS无法得到保障,具体而言,一方面TCP协议与无线网络适配性较差,导致网络丢包率升高、吞吐量下降；另一方面,TCP协议对于业务不区分优先级,不能满足高优先级业务的需求。因此,文章提出了异构网络中基于捕食模型的保障业务QoS的TCP协议(QoS - Internet Predator based on Prey Model,Q-IPPM)。Q-IPPM算法不仅会根据异构网络的带宽改进TCP协议的拥塞控制架构,还根据不同业务的负载状况和优先级控制不同业务流量占比。实验结果表明,Q-IPPM算法不仅可以提显著提高异构网络的吞吐量,降低网络丢包率,还能够根据业务优先级和负载状况将带宽“按需分配”给不同业务,从而保障了异构网络中业务的QoS。

Abstract:

AbstractIn heterogeneous network, a large number of business USES the TCP protocol to transmit, but when the TCP protocol is applied to heterogeneous network, QoS can not be guaranteed. Specifically, on one hand, the TCP protocol and the wireless network are less adaptable, leading to the increase of packet loss rate and the decrease of throughput. On the other hand, the TCP protocol does not prioritize business and does not guarantee high priority business requirements. Therefore, the article proposes a TCP protocol (QoS - Internet Predator based on Prey Model, Q-IPPM) that safeguards business in heterogeneous networks. The q-ippm algorithm not only improves the congestion control architecture of TCP protocol based on the bandwidth of heterogeneous network, but also controls different traffic ratio according to different business load conditions and priority level. The experimental results show that the Q-IPPM algorithm not only can significantly increase the throughput of heterogeneous network, reduce the network packet loss rate, can also according to the business priorities and load status will be bandwidth "to each according to his need" to different business, to ensure the QoS in heterogeneous network environment of the business.