Method for storing and transmitting opportunistic network low-expense immunologic information based on summary vector

Abstract

The invention discloses a method for storing and transmitting opportunistic network low-expense immunologic information based on a summary vector, and belongs to the technical field of opportunistic network. The method comprises the steps of: storing immunologic information into the summary vector, compressing the summary vector containing the immunologic information, cancelling a Request message in a summary vector (SV) message exchange process, and generating new immunologic information in a manner of sharing cross-layer information without increasing any communication expense. By the summary vector, the immunologic information is stored and transmitted with low storage and communication expenses and without a special data structure, and problems that communication and storage expenses in conventional immunologic information generating, storing and transmitting method are relatively large, communication expenses are redundant, length redundancy of the summary vector stored by a node exists, type and number of control messages in the SV message exchange process are redundant and the like are solved. The new immunologic information is generated in a cross-layer manner, the immunologic information is carried by using the summary vector, the length of the summary vector is shortened, the type and number of control messages are decreased, the communication expenses are reduced, and node energy, storage resources and network bandwidth resources are saved.

Description

technical field [0001] The invention relates to the technical field of opportunistic networks, in particular to methods for storing and transmitting information in opportunistic networks. Background technique [0002] Opportunistic network is a kind of delay and split tolerant wireless ad hoc network that does not need a complete path between the source node and the destination node, and uses the encounter opportunity brought by node movement to realize network communication. Opportunistic networks are different from traditional multi-hop wireless networks. The connection between nodes (that is, communication opportunities) is obtained through the encounter of nodes in the process of moving, and it can be used in the case of frequent disconnection and reconnection of wireless links. Complete the task of information transmission, so it can be applied to emergency communication in the lack of communication infrastructure, harsh network environment and emergency emergency; it i...

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Problems solved by technology

[0013] To solve the above problems, we propose four methods: storing immune information into summary vectors, generating new immune information by means of cross-layer information sharing, adaptively compressing summary vectors containing immune information, and canceling Request messages during SV message exchange. The new mechanism solves the problems of excessive communication and storage overhead and excessive node energy and network bandwidth consumption in the existing opportunistic network immune information storage and delivery methods, reduces the communication and storage overhead of nodes, and saves node energy, storage resources and network wireless bandwidth resource

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