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A Forwarding Method in Opportunistic Networks Based on Node Position Cosine Similarity

A technology of cosine similarity and network forwarding, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of difficult to obtain the location of the destination node, uneven data distribution, unfavorable data forwarding success rate, etc., and achieve comprehensive calculation and accuracy, the effect of improving the delivery rate

Active Publication Date: 2021-07-13
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In practical applications, due to the strong randomness of node movement and the difficulty of obtaining the location of the destination node, if the data forwarding of nodes only uses the node forwarding utility value, it may lead to uneven data distribution, which is not conducive to improving the success rate of data forwarding

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  • A Forwarding Method in Opportunistic Networks Based on Node Position Cosine Similarity
  • A Forwarding Method in Opportunistic Networks Based on Node Position Cosine Similarity
  • A Forwarding Method in Opportunistic Networks Based on Node Position Cosine Similarity

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Embodiment Construction

[0026] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Node relationship stability indicates whether the connection between two nodes is stable. Usually, the closer the separation time between a node and its neighbor nodes, the more times they meet, which means that the two are in regular contact, and the relationship between nodes is more stable. Such as figure 1 As shown, it means node v i and v j The meeting information within a period of time includes the time length of node meeting and the time length of node separation.

[0028] Assuming that when two nodes meet for the nth time, the meeting time is left at Calculate node v by formula (1) i and v j The total length of encounter time of .

[0029]

[0030] where en represents the node v i and v j number of encounters.

[0031] Calculate the node v by formula (2) i and v j The nth separation time length of .

[0032...

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Abstract

The invention discloses an opportunistic network forwarding method based on the cosine similarity of node positions, which calculates the forwarding utility value of each node through historical contact information of nodes, such as the number of node encounters, the length of encounter time, and the stability of node relationships. When communicating, the neighbor node with the largest utility value within the communication range is given priority as the initial forwarding node, and then other multiple forwarding nodes are selected according to the cosine degree similarity method, so that the forwarding nodes can be evenly distributed, so as to achieve the purpose of uniform data forwarding.

Description

technical field [0001] The invention belongs to the technical field of mobile sensor network opportunistic forwarding, and in particular relates to an opportunistic network forwarding method based on node position cosine similarity. Background technique [0002] In recent years, a large number of low-cost smart devices with short-distance wireless communication capabilities have developed rapidly, resulting in an opportunistic network (Opportunistic Network) that utilizes the encounter opportunities brought about by node movement to achieve data transmission. As a brand-new networking method, opportunistic networks implement data transmission between nodes in a "store-carry-forward" routing mode, which has attracted extensive attention from researchers. [0003] The utility-based forwarding mechanism is similar to traditional network forwarding. When two nodes enter the communication range of each other to exchange data, each node will save the encounter data for its neighbo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/803H04L12/26
CPCH04L43/08H04L47/125
Inventor 刘林峰朱坤周萍吴家阜
Owner NANJING UNIV OF POSTS & TELECOMM
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