Authors:
Zhiming Chen
1
and
Yang Xiang
2
Affiliations:
1
Nanjing University of Posts and Telecommunications, China
;
2
Jiangsu Key Laboratory of Big Data Security & Intelligent Processing, China
Keyword(s):
Delay tolerant networks, Community, Forwarding, Centrality, Movement direction.
Abstract:
With the popularity of various smart devices and the application of sensor network technology, message transmission using mobile devices is becoming widespread. This paper focuses on the forwarding in mobile social network (MSN). The MSN is a special Delay Tolerant Network (DTN) consisting of mobile nodes. In MSN, nodes move and share information with each other through carried short-range wireless communication devices. Mobile nodes in the MSN typically access some building areas more frequently, such as schools, companies, or apartments, while visiting other areas, such as the roads between buildings, less frequently. The building areas that nodes frequently visit are called communities. To increase delivery ratio and reduce transmission time in MSN, this paper proposes a novel zero-knowledge multi-copy routing algorithm, Mixed Message Forwarding (MMF) which exploits and improves the metric, namely centrality. Centrality reflects the importance of a node in the network. MMF improve
s copy diffusion by using different directions of node movement as well. Special facilities called boundaryboxes are added to the network scenario. Boundaryboxes are special throwboxes. Throwboxes are relays with large storage space and fixed position. MMF is designed and evaluated, which utilizes the aforementioned boundaryboxes to reduce transmission delay. The simulation results show that the MMF can improve the delivery ratio and reduce the transmission delay, compared with other algorithms.
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