Bandwidth resource saving method

Abstract

The invention discloses a method of saving the bandwidth resource, comprising the following: a source node or an access node constructs a path detection requesting message carrying information according to the maximum available bandwidth from a local node to the inyoite interface link of a destination node, and sends the message to a middle node on a path from the local node to the destination node; after the middle node receives the path detection requesting message, the middle node compares the maximum available bandwidth from the local node to the inyoite interface link of the destination node with that in the requesting message to replace the maximum available bandwidth value or directly forwards the maximum available bandwidth value to a next node; and after the destination node receives the path detection requesting message, the destination node constructs a path detection reversion message, carries the maximum available bandwidth in the requesting message, and sends the reversion message to the source node or the access node. The invention perceives the path bandwidth in advance, controls the flow bandwidth at the source node or the access node, and saves the bandwidth resource of the middle node, thereby making the flow on the network link reach the optimum rate of utilization and throughput and improving the availability and the safety of the network.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for saving bandwidth resources. Background technique [0002] The Internet is an ever-growing computer network. When the IP protocol was first introduced, the network only needed to support the interconnection of hundreds of sites and hosts, and the 32-bit IPv4 protocol address fully met the requirements. However, with the rapid development of broadband networks, the large-scale deployment of NGN (next generation network) and 3G networks, and home networks are about to become a reality, a large number of IP addresses are needed. There is a severe shortage of widely used IPv4 addresses. Although technologies such as CIDR (Classless Intra-Domain Routing) and NAT are currently used to further delay the depletion of IPv4 addresses, IPv4 addresses will definitely be depleted in the near future. Therefore, as early as around 1990, the IETF began to research and...

AI Technical Summary

Problems solved by technology

[0011] In the current IP network, the resource reservation protocol (RSVP) can be used to realize the bandwidth reservation, availability, and priority on the network path. The resource reservation protocol is based on each flow, so that the node To retain the state information of each flow, the burden on the intermediate nodes is heavy, and each node needs to exchange a large amount of data signaling at the control plane, so the scalability is poor

And each node in the network has to maintain various databases to implement complex functional modules (such as resource reservation, routing, admission control, etc.), resulting in great complexity

Therefore, the resource reservation protocol has great limitations

In IPv6, the RSVP protocol can also be inherited as an internal application of IPv6, but the limitations of the resource reservation protocol still exist, and it is not convenient for mass deployment in IPv6 networks

[0012] For the bandwidth detection of the path in the network, the implementation of the resource reservation protocol is still complicated, and the resource reservation protocol cannot be deployed in large quantities due to limitations.

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