How Frame Structure in Wimax ?

Mobile WiMAX frame structure Unlike Fixed WiMAX, which uses OFDM frames, Mobile WiMAX uses OFDMA frames. OFDMA allows multiple users to receive data from the base station at the same…

Which Types of Antennas Used in WIMAX ?

WiMAX antennas, just like the antennas for car radio, cell phone, FM radio, or TV, are designed to optimize performance for a given application. The figure above illustrates the three…

How Wireless Narrowband Local-Loop Systems in Wimax ?

Naturally, the first application for which a wireless alternative was developed and deployed was voice telephony. These systems, called wireless local-loop (WLL), were quite successful in developing countries such as…

How MAC Layer work’s in Wimax?

The MAC layer is oriented to the connections. Each connection corresponds to a service flow. The service flow defines the QoS parameters of PDU transmitted over the connection. The design…

How Sub-Carrier Allocation in Wimax?

Sub-Carrier Allocation Mode 1 DL PUSC – Downlink partial Usage Sub-Channels The downlink PUSC replacement zone is unique, that must exist in the frame structure specified by the protocols. DL…

What is NAP & NSP in Wimax ? How it Works ?

NAP: Network Access Provider NSP: Network Service Provider V-NSP: Visited NSP H-NSP: Home NSP NAP provides the operation entities of network facilities required by the WiMAX wireless access for one…

What is Function of CSN in Wimax?

CSN – Core Service Network. Definition It is a combination of a set of network functions and provides IPconnections for the WiMAX subscribers. The CSN consists of the router,AAA agent…

What is Functions of the ASN in Wimax ?

ASN – Access Service Network. Establish layer 2 connections between the BS and the MS.  Transmit AAA messages to the home NSP of the MS.  Assist the high level to…

Ranging in Wimax

The initial range is the process of estimating the distance or propagation time between a transmitter and a receiver. Area information can be used to assist in setting operating parameters…

What are the Advantages of OFDMA in Wimax ?

 OFDMA is essentially a hybrid of FDMA and TDMA: Users are dynamically assigned subcarriers (FDMA) in different time slots (TDMA) . The advantages of OFDMA start with the advantages of…