Method for transmitting data in intermittently-connected mobile network

Abstract

The invention discloses a method for transmitting data in an intermittently-connected mobile network (ICMN). The method comprises the following steps that: each piece of mobile equipment in the network maintains a prediction matrix which meets with other equipment in the network; each row in the matrix corresponds to the prediction of the time when the equipment meets with other equipment; information source equipment generates a message needing to be sent to target equipment and transmitting permission at the same time; equipment i first distributes the message; and when the number of forwarding permission in the equipment i which carries the message needing to be forwarded is lowered to 1, the equipment i switches to a stage two and determines whether to hand over the copy of the message to equipment j for forwarding or not. The method solves the problem of network congestion caused by injecting too many message copies into the network, realizes a more effective accessibility utility function-based message distributing policy, and solves the problem that message distribution in a spray and focus (SAF) algorithm is too random; and low message transfer delay still can be obtained on the premise of restraining the number of the message copies which are injected into the network.

Description

technical field [0001] The invention relates to a data transmission method in an intermittently connected mobile network. It belongs to the field of intermittent connection mobile network (ICMN) data transmission. Background technique [0002] Intermittently connected mobile network (ICMN) refers to a mobile wireless ad-hoc network in which there is no (or most of the time) complete communication link between the source node and the destination node of the data communication. There are many reasons for this phenomenon. Typical reasons include too sparse nodes in the network, movement of nodes in the network, signal attenuation caused by radio frequency shutdown or obstacles, and so on. In the traditional mobile wireless network system, it is considered that such a network is only a few isolated connected areas in this case, and communication between nodes located in different areas cannot be carried out. Since the nodes in the network are frequently moving, the structure o...

AI Technical Summary

Problems solved by technology

The main defect of this type of algorithm is that the transmission delay is relatively large, which cannot meet the requirements of most application scenarios.

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