Wimax standards and Security The Wimax

Part I: A Technical Overview and Performance Evaluation, 2006.
3
MAC Layer Protocol in WiMAX Systems
Maode Ma and Yan Zhang
CONTENTS

1. 
   Introduction 36
   
2. 
   MAC Functions for the PMP Topology 37
   
   1. 
      MAC PDU Composition and Transmission 38
      
      1. 
         MAC PDU Composition 38
         
      2. 
         MPDU Transmission 39
         
      3. 
         MPDU Retransmission Scheme 40
         
   2. 
      Services Provision and Schemes 41
      
      1. 
         Services and Parameters 41
         
      2. 
         Service Implementation Schemes 42
         
   3. 
      Connection Establishment and Maintenance 47
      
      1. 
         Network Entry and Initialization 47
         
      2. 
         Connection Maintenance 47
         
   4. 
      QoS Services 49
      
3. 
   MAC Functions for the Mesh Topology 51
   
   1. 
      Addressing and Connections 51
      
   2. 
      Bandwidth Allocation 52
      
      1. 
         Distributed Scheduling 52
         
      2. 
         Centralized Scheduling 53
         
      3. 
         Mesh Network Synchronization 54
         
4. 
   Summary 55
   

References 55
The medium access control (MAC) layer protocol of any communication sys- tem will normally describe or specify the issues of message composition and transmission, services provision and schemes, resources allocation, QoS sup- port, and connection maintenance. This chapter will generally introduce the above issues at the MAC layer in WiMAX networks [1,2]. There are two types of topologies of the WiMAX system. One is the topology of point to multi- ple points (PMP) and the other is the mesh topology. We first introduce the
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operations and features of the two topologies and then describe the above issues in general.

1.