QoS in Wireless Data Networks

Abstract

Quality of service (QoS) is an important consideration in networking, but it is also a significant challenge. Providing QoS guarantees becomes even more challenging when you add the complexities of wireless and mobile networks. This paper discusses the challenges and solutions involved in providing QoS in wireless data networks. Multiple techniques for providing service guarantees are presented, including data link layer QoS schemes, network layer schemes, integrated (multiple layer) approaches, QoS routing, dynamic class adaptation, and techniques for reservation and admission control.

Keywords

network, wireless, mobile, QoS, Quality of Service, throughput, delay, jitter, loss, media, audio, video, real-time, congestion, routing, fading, interference, MANET

Table of Contents

• 1. Introduction
• 2. QoS Overview and Background
  • 2.1 QoS Guarantees
  • 2.2 Applications Requiring QoS
  • 2.3 Challenges of Wired QoS
  • 2.4 Wired QoS Scheme
  • 2.5 Additional Challenges of Wireless QoS
  • 2.6 User Perceived Quality
• 3. QoS Schemes at the Data Link Layer and Below
  • 3.1 802.11e
  • 3.2 Adaptive Inter-frame spacing in 802.11
  • 3.3 802.16
  • 3.4 INSIGNIA
  • 3.5 Cross-layer Scheduling and Adaptation
  • 3.6 Scheduling for Multimedia Packets in Wireless PANs
  • 3.7 Contention-based QoS in Wireless Networks
  • 3.8 Service Differentiation by Window Size and ARQ Adaptation
• 4. QoS Schemes at the Network Layer and Above
  • 4.1 SWAN
  • 4.2 Congestion Monitoring and Adaptation
  • 4.3 Threshold Management via Fuzzy Logi
• 5. QoS Schemes involving Data Link and Network Layers
  • 5.1 Integrated Adaptive QoS
• 6. Admission and Reservation Schemes
  • 6.1 Admission Control in 802.11e HCF
  • 6.2 Reservation Mechanisms in Wireless Networks
• 7. Class Adaptation Schemes
  • 7.1 Adaptive Management
  • 7.2 Dynamic Class Selection
• 8. QoS Routing Schemes
  • 8.1 Wireless QoS Routing
  • 8.2 QoS Routing in Wireless Mesh Networks
• 9. QoS in Partitioned Networks
  • 9.1 QoS Challenges and Solutions in Partitioned Networks
• 10. Wireless QoS Products
  • 10.1 802.11e Wireless Access Points
  • 10.2 802.11 QoS Enterprise Products
• 11. Summary