Processing method of transferred message under memory route system in delay-tolerant network

Abstract

The invention discloses a processing method of a transferred message under a memory route system in a delay-tolerant network, comprising the following steps: (1) direct forwarding step of looking up a table: after transferring a transferred message from a source node to an agent node, looking up the routing table of the agent node firstly; if the routing table has next hop of route path of the transferred message, sending the transferred message to the next hop; if the routing table does not have the next hop of route path of the transferred message, entering the step that the message waits to be gotten back; (2) waiting step at fixed time: waiting a massage sent by the source node to get back the message when the transferred message is in the agent node; (3) active inquiring step: alternately sending an inquiring massage package to the agent node by the source node according to certain time interval for judging the link breakage situation in the delay-tolerant network; and (4) message heavy-route forwarding step. The invention can effectively optimize the processing process of the transferred message so as to improve message transmission rate, lower time delay and prevent the generation of new congestion nodes.

Description

technical field [0001] The invention mainly relates to the field of network communication, in particular to a multi-stage processing method for transferred messages in a delay network. Background technique [0002] The existing Internet architecture and TCP / IP protocol family and many protocols improved on this basis cannot be well adapted to the network of long-delay links and intermittent links. When the energy and storage resources of communication nodes are limited , the problem will worsen. In challenging network environments, such as Ad-hoc networks, wireless sensor networks, military mobile networks, satellite networks, etc., due to the rapid mobility of nodes and the frequent interruption of links, there is no "end-to-end" connection in the network, and many Heterogeneous regional networks use their own unique protocols because of their independent applications. The network is full of various protocol standards, making it difficult to realize network interconnection...

AI Technical Summary

Problems solved by technology

[0005] (1) In the Push-Pull mechanism, before the proxy node receives the retrieval request, it will judge whether there is a path to forward the transferred message according to the original routing table information, and passively wait for the source node to send a Pull request, and does not give the proxy node The mechanism of rerouting and forwarding after the link is interrupted may cause the message to fail to be sent successfully in the intermittently connected delay network, and will eventually be discarded

[0006] (2) The proxy node or the source node does not have an active query mechanism, but passively waits for the source node to issue a Pull request to retrieve the message. Due to the intermittent nature of the network connection, it takes a long time (corresponding to the waiting time) before the message is retrieved. b) The connection may have been interrupted, and because there is no active inquiry mechanism, neither the source node nor the proxy node can know the link breaking situation in time before the source node sends a Pull request, so this useless waiting time will be a great waste. The delay of message transmission is increased, resulting in the emergence of new congested nodes, which may also lead to the overtime discarding of messages, and the reliability of message transmission cannot be guaranteed

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