Differentiated service core router and data forwarding method thereof

Abstract

The invention discloses a differentiated service core router and a data forwarding method thereof. The method comprises the following steps: differentiating data stream input to the core router according to the class and priority rating; determining the access data stream according to the output connection capacity of the core router; acquiring a data buffer queue; performing packet loss control for each data stream of low priority; searching a forwarding path of the data stream of high priority in the differentiated priority queue according to a routing table; and preferentially forwarding the data stream of high priority. Through the technical means of input data stream differentiation, access control, differentiated priority queue packet loss control and the like, the exit bandwidth of the router is fully utilized, and the rate, minimum delay and packet loss rate of the data stream of voice service and multimedia service of high priority users are ensured.

Description

technical field [0001] The invention relates to network routing technology, in particular to a hierarchical service core router and a data forwarding method thereof. Background technique [0002] In order to meet the needs of voice services and multimedia services, the traditional IP network mainly used for data services has to consider adopting a hierarchical service algorithm for each node router of the network to evolve to a hierarchical service network. In order to ensure the quality of service (Quality of Service, QoS) on the IP network, the Internet Engineering Task Force (IETF) first proposed to use RSVP (Resource Reservation Protocol, resource reservation protocol) and Intserv (integrated service) model, Before sending data, establish a transmission path to the receiving end and reserve resources, and realize end-to-end QoS through mechanisms such as access control, policy control, and classified scheduling control. [0003] Since each router on the transmission pat...

AI Technical Summary

Problems solved by technology

[0009] However, in the existing differentiated service network solution, the core router still has the following problems, so that it cannot guarantee the priority voice service and multimedia real-time service quality of the IP network

[0010] First, the existing core router solution cannot classify the data flow received by the router entrance, control packet loss, and forward according to the service level

When the edge router of the differentiated service network injects prioritized data packets into the core router at the same time, the core router cannot guarantee low delay and low packet loss rate of high priority data packets

[0011] Second, the existing core road does not consider the access control of the input hierarchical data stream according to the output connection capacity

In the case of limited connection capacity, a large number of high-service-level data streams, such as the access of VOIP (Voice over Internet Protocol, Internet telephony), will also cause a large number of core routers to lose packets, which cannot guarantee the high-service-level data that has been accessed. streaming quality of service

[0012] Third, the existing core routers cannot discover the congestion of the downstream node routers of the path

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