Opportunity network architecture based on urban public transport

Abstract

The invention discloses an opportunity network architecture based on urban public transport, providing information gathering service and information announcement service and comprising three-layer architecture of bottom layer node, intermediate layer node and top layer node. The bottom layer node comprises mobile equipment of user and information issuing and information acquisition equipment, thebottom layer uploads own information to the intermediate layer and also can download information which is of interest to the bottom layer from the intermediate layer; the intermediate layer is a public vehicle-mounted BIT node provided with a GPS function module and three wireless interfaces, the BIT node provides information service for the bottom layer and the BIT node and the bottom layer can transmit information each other, and data transceiving can be carried out with the top layer; the top layer is a gateway node which is arranged at fixed position of city and is interconnected with theInternet, and the top layer is in charge of issuing information to mobile BIT node nearby or gathering information from the BIT node. The invention has the advantages that cost is low, expandability is good, and convenient practical low-cost information service is provided for user; and the architecture has data collection function of sensor network.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to an opportunistic network architecture based on urban public transport vehicles. Background technique [0002] An opportunistic network is a delay-tolerant network, characterized by the fact that there may not be an end-to-end connection path between the source node and the destination node, which makes data communication impossible in traditional network architectures. Opportunistic networks use the chances of encountering other nodes during the movement of nodes for data transmission. The nodes of the opportunistic network adopt the "store-carry-forward" mode. When there is no neighbor node suitable for forwarding, the node caches the data in order to wait for a suitable forwarding node in the future, and forwards it hop by hop as the node moves. , and finally forward it to the destination node to realize the transmission (reference [1]: opportunistic network, author Xiong...

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Problems solved by technology

In addition, there are also research projects on opportunity networks combining sensor networks and mobile ad hoc networks. Some institutions have also studied opportunity networks among urban vehicles, but there is no research on opportunity networks based on urban public transportation systems.

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