An Opportunistic Network Data Forwarding Method
A technology of network data and forwarding methods, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problems of communication shutdown, end-to-end link resources, scarcity, etc., and achieve low data transmission delay and high data transmission. The effect of high reach rate and low forwarding cost
Active Publication Date: 2021-07-30
NANJING UNIV OF POSTS & TELECOMM
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[0004] However, an opportunistic network is a highly resource-constrained network, and due to many reasons such as the irregularity of node movement, uneven distribution, and limited local resources of nodes leading to communication closures, there may be end-to-end links in the network most of the time. and the scarcity of resources
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[0047] An opportunistic network data forwarding method. Firstly, the regional model is determined according to the different access frequencies of nodes to different types of regions; then, according to the determined regional model, nodes are selected through the Markov decision algorithm, such as figure 1 As shown, it specifically includes the following steps:
[0048] S1: Initialize the network, divide the network into K rectangular areas and randomly assign area types, and define the concepts of node belonging area, node adjacent area set, physical distance between belonging areas, area correlation and area weight;
[0049] S2: Choose whether to forward the data in the data-carrying node to n (1≤n≤2) meeting nodes according to the Markov decision algorithm. The specific details of the Markov decision algorithm are decision time, possible state, and available actions Set, reward value and transition probability;
[0050]S3: When the number of nodes carrying data is less th...
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The invention discloses an opportunistic network data forwarding method, which determines the area model through the access frequency of nodes of different area types; and selects nodes through the Markov decision algorithm according to the determined area model. The present invention fully considers the differences between area types The difference of the node's weight is obtained by adding weight to each area, thereby quantifying the size of the node's transmission capability. In addition, the present invention uses the Markov decision algorithm to design a data forwarding strategy based on the optimization model, and forwards the data to the meeting node with a relatively strong transmission capability with a relatively high probability, and has a lower forwarding cost and a higher data transmission rate. Reach rate and low data transmission delay.
Description
technical field [0001] The invention relates to a network data forwarding method, in particular to an area type-based opportunistic network data forwarding method, and belongs to the technical field of computer applications. Background technique [0002] With the rapid development of network technology, a large number of low-cost smart devices with short-distance wireless communication capabilities are emerging. For example, vehicles with smart devices driving on the road form a vehicle network, which can realize traffic accident warning and other road Security application; a self-organizing network composed of various handheld electronic devices (such as MP3 players, mobile phones, PDAs, etc.) The emergence of these intelligent devices has greatly promoted the rapid development of wireless self-organizing network applications, such as forming a mobile sensor network and having the function of collecting animal migration data information. [0003] In various practical wirel...
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IPC IPC(8): H04W40/18H04L12/733H04L12/721H04L45/122
CPCH04L45/126H04L45/14H04W40/18
Inventor 刘林峰陈道亮张凌翔周萍吴家皋
Owner NANJING UNIV OF POSTS & TELECOMM