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Network nodes and data transmission method and system

A network node and data technology, applied in digital transmission systems, transmission systems, data exchange networks, etc., can solve problems such as low delay and high success rate, and achieve the effect of taking into account fairness and reducing average delay

Inactive Publication Date: 2014-08-13
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a network node and a data transmission method and system, to solve the problem of high success rate, low delay routing and data transmission in DTN under the condition that both transmission bandwidth and node capacity are limited

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  • Network nodes and data transmission method and system
  • Network nodes and data transmission method and system
  • Network nodes and data transmission method and system

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Embodiment 1

[0057] Embodiment 1 of the present invention discloses a network node.

[0058] Delay Tolerant Network, or DTN, is a wireless distributed mobile network, each node in the network has a predetermined trajectory, for example, a distributed constellation network. In order to solve the problem of routing and data transmission in DTN under the condition of limited node capacity and limited link bandwidth, the present invention formulates an information maintenance and update mechanism for network nodes based on the network characteristics of DTN, and comprehensively based on the principle of fairness. The priority and queuing waiting time define the data forwarding scheduling strategy of the network nodes, thereby providing support for routing selection and data transmission between network nodes in the DTN. The network nodes of the present invention will be described below.

[0059] See figure 1 , the network node includes an information maintenance and updating module 101 , a da...

Embodiment 2

[0095] Embodiment 2 discloses a data transmission method based on the network node in Embodiment 1. Please refer to figure 2 , the method includes the following steps:

[0096] S1: The source node with data transmission needs calculates n potential transmission paths from the source node to the destination node according to the node information of other network nodes maintained by it.

[0097] Since the nodes in the DTN network have definite trajectories, the potential paths and potential relay nodes between any nodes can be accurately calculated.

[0098] by image 3 For example, the source node S needs to transmit the message to the destination node D. At this time, the source node S calculates the topology of the network and the encounters of different nodes through the running track and status of other nodes in the network maintained by the source node. Further, potential paths from S to D at the current time are determined: S-B-C-D, S-B-C-E-D, S-E-D, and S-E-C-D.

[0...

Embodiment 3

[0136] Embodiment 3 discloses a data transmission system, please refer to Figure 5 , the system includes a potential path calculation module 501 , a potential relay acquisition module 502 , a next-hop node selection module 503 , a forwarding module 504 and a judging module 505 .

[0137] The potential path calculation module 501 is configured to enable the source node with data transmission requirements to calculate n potential transmission paths from the source node to the destination node according to the node information of other network nodes maintained by it.

[0138] A potential relay obtaining module 502, configured to enable the source node to obtain x network nodes adjacent to the source node from the n potential transmission paths as potential relay nodes of the source node, where n , x is a natural number not less than 1, and x≤n.

[0139] A next-hop node selection module 503, configured to enable the source node to calculate the weighted expected delay time of ea...

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Abstract

The invention discloses network nodes and a data transmission method and system. Information maintaining and updating mechanisms are formulated for the network nodes based on the DTN characteristic so that each network node can work out the topological structure of the network at any time, and support is provided for subsequent routing selecting. A data forwarding scheduling strategy of the network nodes is formulated according to the data priority and the queue waiting time based on the fairness principle. On the basis, according to the data transmission method, the data queue situation of the current nodes and the link bandwidth between the nodes are comprehensively taken into consideration in a source node, the next jumping node is worked out and obtained based on the real-time state of the current network to achieve data transmission, and the next jumping node is located on the optimal path of the current network. The high real-time performance and fairness of data transmission are taken into account, the average delay of the network is shortened, and the purpose of the high success rate and low delay data transmission in the DTN with the limited transmission bandwidth and node capacity is achieved.

Description

technical field [0001] The invention belongs to the technical field of computer wireless networks, and in particular relates to a network node and a data transmission method and system. Background technique [0002] In recent years, challenging networks deployed in extreme environments have characteristics such as intermittent connections, frequent fragmentation, extremely high latency, asymmetric data rates, high bit error rates and packet loss rates, and heterogeneous interconnections. The Internet (Internet) architecture cannot be effectively applied in this challenging network. [0003] Based on this, in order to realize the interconnection, interoperability and reliable transmission of asynchronous messages among the above-mentioned isolated heterogeneous challenging networks, delay and disruption tolerant network (DTN, delay and disruption tolerant network) as a new type of network architecture Emerged as the times require, DTN is a wireless distributed mobile network...

Claims

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Application Information

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IPC IPC(8): H04L12/721
Inventor 黄河孙玉娥刘超李凡长
Owner SUZHOU UNIV
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