On service differentiation in mobile Ad Hoc networks

Area of Science:

• Computer Science
• Network Engineering
• Wireless Communication

Background:

• Mobile Ad Hoc Networks (MANETs) require robust Quality of Service (QoS) mechanisms to support diverse applications.
• Existing differentiation mechanisms in IEEE802.11 lack comprehensive QoS support for varying application demands.
• Service differentiation is crucial for efficient resource allocation and performance in dynamic network environments.

Purpose of the Study:

• To propose a novel network model for service differentiation in mobile Ad Hoc networks.
• To provide guaranteed Quality of Service (QoS) for different applications.
• To enhance overall network channel utilization.

Main Methods:

• A fully distributed admission control approach is combined with the DIFS-based differentiation mechanism of IEEE802.11.
• Admission controllers calculate committed bandwidth based on reserved bandwidth and network source utilization.
• Packets are marked upon network entry according to their committed rate for differentiated handling.

Main Results:

• The proposed mechanism effectively provides QoS guarantees for assured service traffic.
• Simulation experiments demonstrate a significant increase in network channel utilization.
• Differentiated packet handling based on header marks ensures application-specific QoS profiles are met.

Conclusions:

• The developed network model successfully supports service differentiation in mobile Ad Hoc networks.
• The approach ensures reliable QoS delivery for critical applications.
• The mechanism optimizes resource usage, leading to improved network efficiency.