Priority message forwarding method applied to allowed time delay network

Abstract

The invention relates to a priority message forwarding method applied to an allowed time delay network, which comprises the following steps: carrying out priority classification on messages at a source node and when a node is contacted with a forwarding node, and sending the messages to the forwarding node according to priorities; by the forwarding node in the network, carrying out cache region configuration and message forwarding on the received messages and messages to be sent of the node; and then sending the message with the corresponding priority when the node is contacted with a subsequent forwarding node, wherein an information sink takes charge of receiving the data messages and carrying out corresponding storage according to the priorities. According to the invention, different sending cache regions are set at the source node according to different priority requirements of services and at the message forwarding nodes, forwarding cache regions facing the messages with different priorities are set and the message forwarding is carried out, so that the problem of distinguishing QoS (Quality of Service) requirements of non-real-time services in the allowed time delay network is solved.

Description

technical field [0001] The invention belongs to the technical field of deep space communication, and relates to a priority message forwarding method applied to a delay-tolerant network. Background technique [0002] A delay-tolerant network refers to a network characterized by intermittent connections, frequent fragmentation, extremely high delay, asymmetric packet rate, high bit error rate and packet loss rate, and heterogeneous interconnection. The basic assumptions of this type of network and the traditional network on the lower link, such as, the message transmission time between any two nodes will not exceed a certain value, each link is connected most of the time in the working state, and the message transmission time The packet loss rate is very small and other characteristics are completely different, so designing a reasonable network packet forwarding method becomes the key to effective implementation of the network. [0003] In recent years, researchers have succe...

AI Technical Summary

Problems solved by technology

[0004] The technology of the present invention solves the problem: overcomes the deficiencies of the prior art, provides a priority message forwarding method applied to a delay-tolerant network, and solves the problem of not distinguishing non-real-time services in a delay-tolerant network and only providing a single The problem of best-effort service, which further improves the ability of the delay-tolerant network to support QoS for various services

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