ABSTRACT
CONTENTS 3.1 Introduction ................................................................................................. 36 3.2 MAC Functions for the PMP Topology ................................................... 37
3.2.1 MAC PDU Composition and Transmission ............................... 38 3.2.1.1 MAC PDU Composition ................................................. 38 3.2.1.2 MPDU Transmission ....................................................... 39 3.2.1.3 MPDU Retransmission Scheme ..................................... 40
3.2.2 Services Provision and Schemes ................................................... 41 3.2.2.1 Services and Parameters ................................................. 41 3.2.2.2 Service Implementation Schemes .................................. 42
3.2.3 Connection Establishment and Maintenance ............................. 47 3.2.3.1 Network Entry and Initialization .................................. 47 3.2.3.2 Connection Maintenance ................................................ 47
3.2.4 QoS Services .................................................................................... 49 3.3 MAC Functions for the Mesh Topology .................................................. 51
3.3.1 Addressing and Connections ........................................................ 51 3.3.2 Bandwidth Allocation .................................................................... 52
3.3.2.1 Distributed Scheduling ................................................... 52 3.3.2.2 Centralized Scheduling .................................................. 53 3.3.2.3 Mesh Network Synchronization ................................... 54
3.4 Summary ...................................................................................................... 55 References ............................................................................................................. 55
The medium access control (MAC) layer protocol of any communication system will normally describe or specify the issues of message composition and transmission, services provision and schemes, resources allocation, QoS support, 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 multiple points (PMP) and the other is the mesh topology. We first introduce the
and
operations and features of the two topologies and then describe the above issues in general.
