scholarly journals Adaptive Spray and Wait Protocol for Vehicular DTN

2018 ◽  
Vol 7 (2.16) ◽  
pp. 107
Author(s):  
Vyomal Pandya ◽  
Shruti Bhargava Choubey
Keyword(s):  
Routing Protocol ◽  
High Speed ◽  
Single Copy ◽  
Improve Performance ◽  
Successful Transmission ◽  
Delivery Probability ◽  
Rapid Changes ◽  
Multiple Copies ◽  
Delay Tolerant ◽  
Spray And Wait

Because of high speed of vehicles, short contact durations and rapid changes in topology occurs in Vehicular Delay Tolerant Networks(VDTNs). This will generates few transmission opportunities and high and unpredictable delay. This problem can be solved by different routing protocol of VDTN . The VDTN protocol can be divided as single copy and multicopy. In single copy protocol the node is allowed to generate the unique copy of message and forward it on a unique path.The multi copy protocols generate and transmit the multiple copies of each message and forward it along various paths. If more number of copy spread in network there are more chances for successful transmission. The objective of paper is to improve performance of VDTN by modifying existing Spray and Wait protocol. In this paper we provide proposed algorithm for modify spray and wait protocol for improving delivery probability with different number of message copy. The modifications based on stored number of message copies at source/rely nodes and encountered nodes ratio.  

Enhanced fuzzy logic-based spray and wait routing protocol for delay tolerant networks

2014 ◽  
Vol 29 (12) ◽  
pp. 1820-1843 ◽  
Author(s):  
Sweta Jain ◽  
Meenu Chawla ◽  
Vasco N. G. J. Soares ◽  
Joel J. Rodrigues
Keyword(s):  
Fuzzy Logic ◽  
Routing Protocol ◽  
Delay Tolerant Networks ◽  
Delay Tolerant ◽  
Spray And Wait

scholarly journals An Improved PRoPHET Routing Protocol in Delay Tolerant Network

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Seung Deok Han ◽  
Yun Won Chung
Keyword(s):  
Routing Protocol ◽  
Delay Tolerant Network ◽  
Source Node ◽  
Destination Node ◽  
Average Delay ◽  
Intermediate Node ◽  
Delivery Probability ◽  
History Of ◽  
Delay Tolerant ◽  
Overhead Ratio

In delay tolerant network (DTN), an end-to-end path is not guaranteed and packets are delivered from a source node to a destination node via store-carry-forward based routing. In DTN, a source node or an intermediate node stores packets in buffer and carries them while it moves around. These packets are forwarded to other nodes based on predefined criteria and finally are delivered to a destination node via multiple hops. In this paper, we improve the dissemination speed of PRoPHET (probability routing protocol using history of encounters and transitivity) protocol by employing epidemic protocol for disseminating messagem, if forwarding counter and hop counter values are smaller than or equal to the threshold values. The performance of the proposed protocol was analyzed from the aspect of delivery probability, average delay, and overhead ratio. Numerical results show that the proposed protocol can improve the delivery probability, average delay, and overhead ratio of PRoPHET protocol by appropriately selecting the threshold forwarding counter and threshold hop counter values.

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