QoS in Cellular Networks

Abstract:

This paper discusses different schemes for providing Quality of Service (QoS) in cellular networks. Each scheme has its own algorithm to provide QoS and every scheme has its advantages and disadvantages. I have also dealt about an important aspect of QoS which is the Individual QoS (iQoS). iQoS measures the satisfaction rate per user and it is measured individually at each and every user terminal. Voice traffic is very delay sensitive and data traffic is loss sensitive. QoS schemes which try to incorporate both voice and data have to take into consideration this issue. I have also discussed the integration of WLAN/cellular networks in which the high data rate of the WLAN network and the high mobility of cellular networks are utilized effectively.
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Table of Contents:

• 1. Introduction: What is QoS
  • 1.1 Why do we need QoS
  • 1.2 QoS Challenges
  • 1.3 What has been achieved so far in QoS
• 2. UMTS QoS Architecture
  • 2.1 End - to - End Service and UMTS Bearer Service
  • 2.2 The Radio Access Bearer Service and the Core Network Bearer Service
  • 2.3 The Radio Bearer Service and the RAN Access Bearer Service
  • 2.4 The Backbone Network Service
• 3. UMTS QoS Classes and Attributes
  • 3.1 Conversational Class
  • 3.2 Streaming Class
  • 3.3 Interactive Class
  • 3.4 Background Class
  • 3.5 QoS Attributes
• 4. DIFFERENT QoS SCHEMES IN CELLULAR NETWORKS
  • 4.1 Fault Tolerant Dynamic Channel Allocation Scheme
    • 4.1.1 System Model
    • 4.1.2 Distributed Channel Allocation Algorithm
  • 4.2 Call Admission Control(CAC) Scheme
    • 4.2.1 Channel Prioritization Schemes
    • 4.2.2 Call Admission Algorithm (CAC)
  • 4.3 QoS based on Mobility Prediction Techniques
    • 4.3.1 Road Topology based Mobile Prediction Techniques
  • 4.4 Dynamic Allocation Scheme using Renegotiation
    • 4.4.1 Different Service Classes
    • 4.4.2 Renegotiation Scheme
    • 4.4.3 Renegotiation by Flow Termination
  • 4.5 Individual QoS for Voice Services
    • 4.5.1 Purpose of Measuring iQoS
    • 4.5.2 Concept of iQoS Rating
• 5 QoS in Cellular/WLAN Networks
  • 5.1 Tight Coupled QoS Model Structure
  • 5.2 Loosely Coupled Cellular/WLAN interworking Model
    • 5.2.1 Call Admission for Voice and Data Traffic
• 6. Summary
• References
• List of Acronyms