Universiti Teknologi Malaysia Institutional Repository

Priority queue based reactive buffer management policy for delay tolerant network under city based environments

Ayub, Qaisar and Md. Ngadi, Asri and Rashid, Sulma and Habib, Hafiz Adnan (2018) Priority queue based reactive buffer management policy for delay tolerant network under city based environments. PLOS ONE, 13 (2). e0191580-e0191580. ISSN 1932-6203

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Official URL: http://dx.doi.org/10.1371/journal.pone.0191580


Delay Tolerant Network (DTN) multi-copy routing protocols are privileged to create and transmit multiple copies of each message that causes congestion and some messages are dropped. This process is known as reactive drop because messages were dropped re-actively to overcome buffer overflows. The existing reactive buffer management policies apply a single metric to drop source, relay and destine messages. Hereby, selection to drop a message is dubious because each message as source, relay or destine may have consumed dissimilar magnitude of network resources. Similarly, DTN has included time to live (ttl) parameter which defines lifetime of message. Hence, when ttl expires then message is automatically destroyed from relay nodes. However, time-to-live (ttl) is not applicable on messages reached at their destinations. Moreover, nodes keep replicating messages till ttl expires even-though large number of messages has already been dispersed. In this paper, we have proposed Priority Queue Based Reactive Buffer Management Policy (PQB-R) for DTN under City Based Environments. The PQB-R classifies buffered messages into source, relay and destine queues. Moreover, separate drop metric has been applied on individual queue. The experiment results prove that proposed PQB-R has reduced number of messages transmissions, message drop and increases delivery ratio.

Item Type:Article
Uncontrolled Keywords:Delay Tolerant Network (DTN), PQB-R
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
ID Code:85937
Deposited By: Widya Wahid
Deposited On:30 Jul 2020 15:39
Last Modified:30 Jul 2020 15:39

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