WiMAX Technology: Principles and Layers

WiMAX Technology: Principles and Layers

WiMAX technology based on the IEEE 802.16 specifications to enable the delivery of last-mile wireless broadband access as an alternative to cable and DSL.

The design of the WiMAX network is based on the following major principles : 

Spectrum: WiMAX can be deployed in both licensed and unlicensed spectra.

Topology: WiMAX supports different Radio Access Network (RAN) topologies.

Interworking: WiMAX supports independent RAN architecture to enable seamless integration and interworking with WiFi, 3GPP, and 3GPP2 networks and existing IP operator core networks.

IP connectivity: WiMAX supports a mix of IPv4 and IPv6 network interconnects in clients and application servers.

Mobility management: WiMAX has the possibility to extend fixed access to mobility and broadband multimedia services delivery. 

The WiMAX standards are organized into three layers. They are: 

1. The physical layer (PHY): This layer specifies the frequency band the modulation method, error correction techniques, synchronization between the transmitter and the receiver, data rate, and the multiplexing structure.

Must Read>> WiMAX-Physical (PHY) Layer

2. The media access control layer (MAC): This layer is responsible for transmitting data in frames and controlling access to the shared wireless medium through the media access control layer. The MAC protocol defines how and when a base station or a subscriber station can initiate transmission on the channel.

Must Read>> WiMAX-MAC Layer

3. Convergence layer: It provides functions specific to the service being provided. The bearer services include digital audio/video multicast, digital telephony, ATM, Internet access, wireless trunks in telephone networks, and frame relay.

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