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Energy-efficient fragmentation-aware dual adaptive collision-free bit mapping MAC protocol for VANET.

Fuhid Alanazi1, Manoj Tolani2, Sultan Alanazi3

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A new adaptive bit-map assisted protocol (ACFM-ABMA MAC) improves energy efficiency in vehicular ad hoc networks (VANETs) by dynamically fragmenting communication slots. This reduces slot wastage and enhances channel utilization for vehicles.

Keywords:
Bit-mappingFragmentationMedium access controlVehicular ad-hoc network

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Area of Science:

  • Computer Science
  • Network Engineering
  • Wireless Communication

Background:

  • Vehicular ad hoc networks (VANETs) require efficient medium access control (MAC) protocols for communication.
  • Previous protocols like ACFM-BMA optimized energy using EV battery and buffer status but suffered from slot underutilization.

Purpose of the Study:

  • To propose an enhanced energy-efficient MAC protocol (ACFM-ABMA MAC) for adaptive data traffic in VANETs.
  • To address the limitation of underutilized slots in existing protocols.

Main Methods:

  • Introduced the adaptive bit-map assisted protocol (ACFM-ABMA MAC).
  • Dynamically fragmented each slot into four subslots using two control bits for fine-grained allocation.
  • Analyzed protocol performance under varying traffic conditions (low, moderate, high) and traffic types (periodic, event-driven).

Main Results:

  • The ACFM-ABMA MAC protocol significantly reduces slot wastage.
  • Achieves better channel utilization compared to previous methods.
  • Demonstrates superior energy efficiency and bounded latency across diverse traffic scenarios.

Conclusions:

  • The proposed ACFM-ABMA MAC protocol offers enhanced energy savings and communication efficiency in VANETs.
  • Dynamic slot fragmentation is an effective strategy for optimizing resource allocation in adaptive traffic conditions.
  • The protocol shows promise for improving overall network performance in intelligent transportation systems.