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Chang, I., Li, C., Chou, C. (2015). Efficient Packet Replication Control for a Geographical Routing Protocol in Sparse Vehicular Delay Tolerant Networks. Scientia Iranica, 22(4), 1517-1533.
Ing-Chau Chang; Chien-Hsun Li; Cheng-Fu Chou. "Efficient Packet Replication Control for a Geographical Routing Protocol in Sparse Vehicular Delay Tolerant Networks". Scientia Iranica, 22, 4, 2015, 1517-1533.
Chang, I., Li, C., Chou, C. (2015). 'Efficient Packet Replication Control for a Geographical Routing Protocol in Sparse Vehicular Delay Tolerant Networks', Scientia Iranica, 22(4), pp. 1517-1533.
Chang, I., Li, C., Chou, C. Efficient Packet Replication Control for a Geographical Routing Protocol in Sparse Vehicular Delay Tolerant Networks. Scientia Iranica, 2015; 22(4): 1517-1533.

Efficient Packet Replication Control for a Geographical Routing Protocol in Sparse Vehicular Delay Tolerant Networks

Article 3, Volume 22, Issue 4, August 2015, Page 1517-1533  XML PDF (5237 K)
Authors
Ing-Chau Chang1; Chien-Hsun Li1; Cheng-Fu Chou2
1Dept. of Computer Science and Information Engineering National Changhua University of Education, Changhua, Taiwan
2Dept. of Computer Science and Information Engineering National Taiwan University, Taipei, Taiwan
Abstract
To date, many vehicular ad hoc network unicast routing protocols have been proposed to support efficient packet transmission between vehicles in urban environments. However, when there is insufficient vehicle density during non-rush hour times, the vehicular ad hoc network is often intermittently connected. These unicast routing protocols therefore perform poorly when forwarding packets over this vehicular disruption tolerant network. This paper adopts the controlled replication approach in a proposed IG-Ferry routing protocol to spray a limited number of packet copies, denoted by the packet token values, to relay vehicles in a vehicular disruption tolerant network. We then identify three kinds of relay vehicles, i.e., direct buses, non-direct buses and private cars, according to their travel itineraries. Based on the proposed delay evaluation function for the three types of intermediate vehicles, the IG-Ferry packet spraying mechanism, instead of the traditional binary spraying one, can efficiently spray appropriate packet tokens to vehicles. Finally, intensive NS2 simulations are conducted using the realistic Shanghai city vehicle traffic trace, IEEE 802.11p protocol with EDCA and Nakagami radio propagation model to show that IG-Ferry outperforms three well-known VDTN routing protocols, in terms of average packet delivery ratios, end-to-end transmission delays and packet replication overheads with respect to various combinations of five communication parameters.
Keywords
Vehicular Ad Hoc Network; Vehicular Delay Tolerant Network; Controlled Replication; Binary Spraying; IG-Ferry; Delay Evaluation Function
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