Background Of Wimax Network The backbone of all the advancement is communicational advancement. Now the most speeding and reliable networking technology has been released to fulfill the end users requirements with the ease of mobility and high quality of the services integrating with best effort and connection oriented paradigm. The aim of these networks would be to provide multimedia services, such as voice, video and continuous data streams at high data-rates to mobile users in large coverage areas at all times.
Background Of Wimax Network The backbone of all the advancement is communicational advancement.
Now the most speeding and reliable networking technology has been released to fulfill the end users requirements with the ease of mobility and high quality of the services integrating with best effort and connection oriented paradigm. The aim of these networks would be to provide multimedia services, such as voice, video and continuous 802.16e thesis streams at high data-rates to mobile users in large coverage areas at all times.
The architecture for the next generation of wireless networks aims to integrate multiple 802.16e thesis and benefit from the resulting synergy.
There are various standardization bodies working towards this vision. However, to achieve a seamless integration there are several technical challenges that have to be addressed such as mobility management, resource allocation, admission control, protocol adaptation, security, and pricing.
On the brighter side, the advances in integrated circuit design and software radio make it possible to implement multiple network interfaces in a single mobile terminal. Such terminals can access different types of wireless and mobile networks, which provide more versatile and flexible access options, making the integration feasible.
In Septembera revision project called This project concluded in with the release of WIMax devices are created to operate the three different bands 2. Wi-max is intended to give a higher coverage area of 20 miles. WIMax standard eliminate the problem of last mile and act as an alternative to cable and DSL technologies.
Since it support mobile application thats why it is called as mobile WIMax. As shown in Table 1. Wimax is used as metropolitan area network wireless connectivity.
Wimax provides broadband data access for urban and rural areas. It provides point-to-point links, residential broadband and high-speed business connections.
Wimax systems also support mesh networks, allowing Wimax system to forward packets between base stations and subscribers without having to install communication lines between base stations. Point-to-Point P2P - Point to point is used where there are two points of interest: This is also a scenario for backhaul or the transport from the data source data center, fiber, Central Office, etc to the subscriber or for a point for distribution using point to multipoint architecture.
Backhaul radios comprise an industry of their own within the wireless industry.
As the architecture calls for a highly focused beam between two points range and throughput of point-to point radios will be higher than that of point-to-multipoint products. One base station can service hundreds of dissimilar subscribers in terms of bandwidth and services offered. This limited the number of subscribers they could reach.
WIMax functions best in line of sight situations and, unlike those earlier technologies, offers acceptable range and throughput to subscribers who are not line of sight to the base station.
LoS and non-LoS configuration shown in fig. Fixed-WIMax WIMax provides fixed, portable or mobile non-line-of sight service from a base station to a subscriber station, also known as customer premise equipment CPE.
Some goals for WIMax include a radius of service coverage of 6 miles from a WIMax base station for point-to-multipoint, non-line-of-sight service. This service should deliver approximately 40 megabytes per second Mbps for fixed and portable access applications.
The WIMax cell site should offer enough bandwidth to support hundreds of businesses with T1 speeds and thousands of residential customers with the equivalent of DSL services from one base station . Mobile WIMax Mobile WIMax takes the fixed wireless application a step further and enables cell phone-like applications on a much larger scale.
For example, mobile WIMax enables streaming video to be broadcast from a speeding police or other emergency vehicle at over 70 MPH. In addition to being the final leg in a quadruple play, it offers superior building penetration and improved security measures over fixed WIMax.
They are listed in the followings . Wireless radio channel-wireless radio plays a very important role in Wimax. As compared to other communication channels the signals are protected by the physical medium which is comparably stable and robust.
There are certain more factors like obstructions, terrain undulations, relative motion between the transmitter and the receiver, interference, noise created by some other source can affect the radio channel and these factors are more unpredictable. These are the same factors which need to be taken care in WIMax, for example shadowing, multipath fading, inter symbol interference, Doppler spread, Additive white Gaussian noise AWGN .
An application can be of different type such as voice, data, video and multimedia. Every application is depend upon the terms like data rate, traffic flow, packet loss, delay and so on. So it is a challenge to rightly balance the resource allocation with various applications and users and another factor the QoS requirement across the wireless link, Quality of service has to be defined for end-to-end users in the network that includes switching a variety of aggregation, switching and routing elements between the end to end users .
Latency - Latency is the end-to-end delay of the voice signal from the person on one side of the conversation to the person on the other end of the conversation.(WDSL), Wireless Local Loop (WLL).
IEEE e has been developed for mobile wireless communication which is based on OFDM technology and this enables going towards the 4G mobile in the future. In this thesis work, we built a simulation model based on e OFDM-PHY baseband and demonstrated in different simulation scenarios with different.
Worldwide Interoperability for Microwave Access (WiMAX) is a broadband wireless technology based on IEEE and IEEE e This thesis is a study of WiMAX technology and market. The background of WiMAX development is introduced and opportunities and challenges for WiMAX are analyzed in the beginning.
Matlab source code for the test vectors and Simulink model for physical layer. This model is based on Physical Layer Specification of IEEE e and ETSI HiperMAN. Run Data.m to copy data to workspace and then run the WiMAX model. Spectral Efficiency and BER Analysis In e Standard A thesis submitted in partial fulfilment of the requirements for the award of the Degree of.
WiMAX (e) Base Station M SHAKEEL BAIG Signal Processing Group Department of Signals and Systems Chalmers University of Technology thesis, and my thanks to its employees for providing an encouraging environment, during my stay at the office.
I express my sincere thanks to my supervisors, Yusuf Jamal, Klas Brink and Rickard. Handover Performance in the Mobile WiMAX Netrworks by Yongxue Yu A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering Department of Electrical Engineering College of Engineering University of South Florida Major Professor: Ravi Sankar, Ph.D Richard D, Gitlin, Sc.D.