Data subscription and distribution method applicable to delay-tolerant and disconnection-tolerant network

A technology of delay-tolerant and fault-tolerant network and data subscription, which is applied in the field of data subscription and distribution of delay-tolerant and fault-tolerant network, which can solve the problems of low delivery rate and large delivery delay

Active Publication Date: 2015-01-21
湖北交通职业技术学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, applying the network coding technology and the "store-carry-forward" routing mechanism in the data subscription and distribution process will make full use of the network transmission capacity, improve network utilization, reduce transmission delays, and solve the problems of traditional subscription distribution mechanisms. Problems such as low delivery rate and large delivery delay in the restricted network

Method used

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  • Data subscription and distribution method applicable to delay-tolerant and disconnection-tolerant network
  • Data subscription and distribution method applicable to delay-tolerant and disconnection-tolerant network
  • Data subscription and distribution method applicable to delay-tolerant and disconnection-tolerant network

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Embodiment

[0081] Embodiment: a data subscription distribution method suitable for delay-tolerant and fault-tolerant networks,

[0082] Assume that the data transmitted by the source includes P={p 1 ,p 2 ,...p n} and other n theme data packets, each theme data packet consists of a string of variable-length binary bits p i =b 1 b 2 b 3 …b m ;

[0083] Specific steps include:

[0084] (1) The source node encodes and releases the data packet process as follows: figure 2 As shown, it specifically includes the following steps:

[0085] (1.1) The source detects adjacent nodes, and calculates the output path number k of the source node; if k=0, continue to detect until an adjacent node appears;

[0086] (1.2) The binary data string p of the subject data packet i =b 1 b 2 b 3 …b m Equally divided into k substrings of length 1024 {p i1 ,p i2 ,...p ik}; if k>10, then p i Truncate, encode and transmit in batches; if k≤10, go to (1.3);

[0087] (1.3) If the last data substring ...

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Abstract

The invention relates to the field of data distribution, in particular to a data subscription and distribution method applicable to a delay-tolerant and disconnection-tolerant network. The method is achieved through the technical scheme. According to the technical scheme, the data subscription and distribution method applicable to the delay-tolerant and disconnection-tolerant network includes the steps that first, information source nodes perform data packet code issuing; second, relay nodes perform code forwarding; third, an information sink issues a theme subscription packet; fourth, the theme subscription packet is processed by the relay nodes; fifth, the relay nodes perform congestion control processing on a theme data issuing table and a theme information subscription table; sixth, information sink nodes perform data decoding; seventh, ACK data packets are processed by the relay nodes. Through the method, a network code transmission mechanism, a data subscription and distribution mechanism and functions such as a data congestion control function are fused, and the function of data distribution in a delay-tolerant and disconnection-tolerant network environment is achieved.

Description

technical field [0001] The invention relates to the field of data distribution, in particular to a data subscription and distribution method suitable for delay-tolerant and outage-tolerant networks. Background technique [0002] In the future, with the popularization of mobile computing, there will be more opportunities for data interaction through WiFi, 802.11 and other wireless methods. Intermittent connections and transmission delays may be a normal phenomenon. Therefore, the next-generation Internet must consider the interruption and delay network environment. To supplement the existing "high-bandwidth and low-latency" network, a concept of "delay-tolerant and interrupt-tolerant network" is proposed. [0003] Delay-tolerant and fault-tolerant network is a new network model proposed to solve the problem of data transmission in heterogeneous and unreliable network environments. Compared with the traditional network, the delay-tolerant and fault-tolerant network has the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04L1/16
Inventor 夏奕王孝斌白桂银
Owner 湖北交通职业技术学院
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