Priority and multi-granularity based content sharing method under opportunity network environment

Abstract

The invention provides a priority and multi-granularity based content sharing method under an opportunity network environment, and relates to the content sharing method of an opportunity network. The content sharing method comprises the following steps: 1), defining shared content information and request information including granularity by a user, and calculating a node friendship degree; 2), establishing a communication link and exchanging the respective request collection and the carried content segment statement; 3), calculating the priority of a node storage content; 4), if the communication link still exists, then copying the content segment with the highest priority to a forwarding queue from a cache by the node, or ending the current encountering communication opportunity; 5), if the receiving node has enough storage space, then transmitting the content segment to a counter node by the node to realize the distribution and propagation of the shared content; otherwise performing cache management on the receiving node, that is converting the content segment of high granularity according to the importance weight, so as to make room for storage to perform data transmission; 6), if the node still has a content block which is set with priority, then turning to step 4); otherwise disconnecting the current link, and waiting for the next opportunity of communication and content transmission.

Description

technical field [0001] The invention relates to a content sharing method of an opportunistic network, in particular to a content sharing method based on priority and multi-granularity in an opportunistic network environment between mobile nodes. Background technique [0002] With the development of modern communication means, a new type of information dissemination network composed of artificially carried wireless devices is quietly appearing. In this environment, nodes (such as sensor nodes, smartphones) will communicate directly and share local data objects (such as news, music and photos). However, due to the movement of nodes, the connection link is often not stable, and there is no stable end-to-end path. This type of network is called "Mobile Opportunistic Network (Mobile Opportunistic Network) (see Xiong Yongping, Sun Limin, Niu Jianwei, etc., Opportunistic Network .Software Journal, 20(1):124–137,2009.). The mobile opportunistic network adopts the "store-carry-forwa...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of content redundancy and inefficiency in the transmission of existing content sharing methods, provide a personalized content sharing solution for users, reduce unnecessary content data transmission, reduce sharing delays, and improve user experience. A priority-based and multi-granularity content sharing method in an opportunistic network environment

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