Introduction of the Parameter "Approach Ratio" for the Improvement of Higher Delivery Rate with Suppressing Network Resource Consumption in Delay Tolerant Network

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概要

• 論文の詳細を見る

• The delay/disruption tolerant network (DTN) has been researched actively in the last years because of its high applicability to ubiquitous network services such as sensor networks and intelligent transport system (ITS) networks. An efficient data forwarding method for those network services is one of the key components in DTN due to the limitation of wireless network resources. This paper proposes a new DTN scheme for vehicle network systems by introducing the parameter, "approach ratio", which represents node movement history. The proposal utilizes passive copy strategy, where nodes within one hop area of packet forwarders receive, copy and store packets (namely, passive copies) for future forwarding, in order to obtain higher delivery rate and lower delivery delay whilst suppressing the network resource consumption. Depending on its approach ratio, a node with passive copy decides whether it forwards the passive copy or not by referring to the approach ratio threshold. The approach ratio allows our proposal to adjust the property of both single-copy type scheme, that can lower network resource consumption, and multi-copy type scheme, that can enhance the performance of delivery rate and delay time. In simulation evaluation, the proposal is compared with three typical existing schemes with respect to network consumption, delivery rate and delivery delay. Our proposal shows the superior performance regarding the targeted purpose. It is shown that the approach ratio plays the significant role to obtain the higher delivery rate and lower delay time, while keeping network resource consumption lower.

• The Institute of Electronics, Information and Communication Engineersの論文
• 2011-06-01

著者

• Matsui Susumu

  Systems Development Laboratory Hitachi

• Murata Masayuki

  The Graduate School Of Engineering Science Osaka University

• HAYASHI Masato

  Renesas Electronics Europe GmbH

• WAKAMIYA Naoki

  the Graduate School of Information Science and Technology, Osaka University

• MATSUI Susumu

  Systems Development Laboratory, Hitachi Ltd.

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