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Range aware message drop policy for delay tolerant networks.

Samiullah Khan1, Khalid Saeed1, Muhammad Faran Majeed2

  • 1Department of Computer Science, Shaheed Benazir Bhutto University Sheringal, Upper Dir, Khyber Pakhtunkhwa, Pakistan.

Peerj. Computer Science
|August 15, 2024
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Summary
This summary is machine-generated.

Delay tolerant networks (DTNs) face delivery issues due to connectivity gaps. A new Range Aware Drop (RAD) scheme improves message delivery by prioritizing messages with longer time to live (TTL), reducing drops and network congestion.

Keywords:
Delay tolerant networksDelivery probabilityMessage drop policiesTTL

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Area of Science:

  • Computer Science
  • Networking

Background:

  • Delay Tolerant Networks (DTNs) struggle with message delivery due to intermittent connectivity.
  • Limited buffer capacity in DTN nodes causes network congestion and message loss when buffers are full.

Purpose of the Study:

  • To propose a novel buffer management scheme, Range Aware Drop (RAD), for DTNs.
  • To enhance message delivery probability and reduce overhead ratio in DTNs.

Main Methods:

  • Developed the Range Aware Drop (RAD) buffer management scheme.
  • RAD considers message size and Time To Live (TTL) for prioritizing messages.
  • Simulated RAD and compared its performance against Drop Oldest (DOA) and Size Aware Drop (SAD) schemes.

Main Results:

  • RAD significantly improves delivery probability and reduces overhead ratio compared to DOA and SAD.
  • RAD achieved an average hop count of 1.7, compared to 3.4 for DOA and 3.9 for SAD.
  • RAD demonstrated a message drop ratio of 36.2%, substantially lower than SAD (73.3%) and DOA (84.9%).

Conclusions:

  • The Range Aware Drop (RAD) scheme effectively mitigates network congestion in DTNs.
  • RAD's utilization of TTL enhances message delivery efficiency and reduces unnecessary message drops.