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SAFE-MAC: Speed Aware Fairness Enabled MAC Protocol for Vehicular Ad-hoc Networks.
Md Abubakar Siddik1, Shafika Showkat Moni2, Mohammad Shah Alam3,4
1IICT, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh. siddik.ece@hstu.ac.bd.
Sensors (Basel, Switzerland)
|May 28, 2019
Summary
This study introduces SAFE-MAC, a novel protocol for vehicular networks that ensures fair data transmission for vehicles of varying speeds. By considering vehicle movement, it improves fairness in wireless channel access.
Area of Science:
- Computer Science
- Electrical Engineering
- Networking
Background:
- Vehicular Ad-hoc Networks (VANETs) face fairness challenges due to dynamic topology, mobility, and traffic density.
- Existing Medium Access Control (MAC) protocols like IEEE 802.11 DCF do not guarantee minimum packet transmissions for faster vehicles or proportionality to service area residence time.
- Current protocols offer either proportionality to time or a minimum transmission, but not both, highlighting a gap in fair resource allocation.
Purpose of the Study:
- To propose a novel MAC protocol, SAFE-MAC, that addresses fairness issues in VANETs for vehicles with varying speeds.
- To enhance fair sharing of the wireless channel by considering individual vehicle mobility metrics.
- To improve upon existing MAC protocols that fail to balance transmission proportionality with guaranteed minimums.
Main Methods:
- Developed the Speed Aware Fairness Enabled MAC (SAFE-MAC) protocol.
- Integrated mobility metrics (position, direction, speed) to calculate vehicle residence time.
- Dynamically adjusted MAC protocol parameters (contention window, backoff stage, retransmission limit) based on residence time to synthesize transmission probability.
- Created an analytical model to evaluate SAFE-MAC's performance against contemporary protocols.
Main Results:
- The proposed SAFE-MAC protocol significantly improves fairness among vehicles with different speeds in VANETs.
- Numerical analysis demonstrates superior performance compared to existing MAC protocols in achieving equitable channel access.
- The protocol effectively balances transmission rates based on vehicle residence time and speed variations.
Conclusions:
- SAFE-MAC offers a robust solution for fairness challenges in VANET MAC protocol design.
- The protocol's adaptive nature ensures more equitable resource allocation in dynamic vehicular environments.
- This research contributes to more efficient and fair communication in the rapidly evolving field of intelligent transportation systems.
Keywords:
MAC protocolVehicle to Infrastructure (V2I)Vehicular Ad-hoc Network (VANET)fairnesssafety and non-safety applicationsMore Related Videos
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