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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 20 / 107

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Scope of standard

CS SAP

Management Entity

Service­Specific Convergence Sublayer (CS)

Service Specific CS

MAC SAP

MAC Common Part Sublayer (MAC CPS)

Management Entity

MAC CPS

M A C

P H Y

PHY SAP

Management Entity

Physical Layer (PHY)

PHY

Security Sublayer

Security Sublayer

Data /Control Plane

Management Plane

Figure 2.1: IEEE 802.16 Protocol Stack

The PHY layer includes multiple specifications, which make the standard adaptable to different frequency ranges. The flexibility of the PHY enables the system designers to tailor their system according to the requirements. The PHY speci ies some mandatory features to be implemented with the system including some optional features.

2.3 Network Architecture and Deployment Topology:

An IEEE 802.16 network is consists of ixed infrastructural sites. In fact, the IEEE 802.16 network is resembled to cellular phone network. Each cell consists of a Base

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