Coping method for accidental invalidation of connection of spatial delay tolerant network

Abstract

The invention discloses a coping method for accidental invalidation of the connection of a spatial delay tolerant network. The method cooperatively works with an LTP protocol providing reliable transmission, and comprises establishing and using a connection invalidation finding mechanism, a connection recovery detection mechanism, a connection invalidation and recovery notification mechanism, a connection diagram updating mechanism and a routing computation mechanism covering the connection invalidation; the continuous retransmission of a beam is used as a mark for connection invalidation; when connection invalidation is found, other nodes are informed of the invalidation information and update the connection information according to the notification, and eliminate the invalid connections from paths when computing routes, so as to deal with the problem of connection invalidation caused by space electromagnetic interference or ultralow node energy.

Description

technical field [0001] The invention relates to the technical field of computer network. More specifically, it relates to a method for dealing with unexpected failures of spatial delay tolerant network connections. Background technique [0002] With the continuous development of Internet and space detection technology, space network design has become a research hotspot. Due to the long end-to-end delay, high bit error rate, and frequent link interruptions in the space environment, the traditional TCP / IP network cannot be directly used in the space network. The delay tolerant network (Delay Tolerant Network) proposed by NASA , DTN) can solve these problems very well and become a solution for space network. The DTN protocol newly defines the bundle layer and the aggregation layer, divides the application layer data into small bundles for transmission, and uses a store-and-forward strategy to deal with frequent link interruptions. When there is no end-to-end link, the bundle ...

AI Technical Summary

Problems solved by technology

[0008] While CGR uses the predicted connection information to calculate the route, it also brings the problem that the accuracy of the connection graph is extremely high.

The complex and changeable space environment can easily lead to unexpected connection failures. At this time, the connection diagram configured according to the initial connection information is no longer consistent with the actual connection status. The route calculated according to the original configuration will not be available, resulting in routing failure.

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