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QUALITY OF SERVICE (QOS) IN WI-MAX

Ravikant Kaushik .
2012 International Journal of Research in Engineering and Technology  
In particular, 802.16d used Orthogonal Frequency Division Multiplexing.  ...  This paper is mainly concern with Quality of service in WI-MAX technology.  ...  model) SUBCHANNELIZATION The OFDM PHY layer supports UpLink (UL) subchannelization, with the number of subchannels being 16.  ... 
doi:10.15623/ijret.2012.0102010 fatcat:uihxvldaqzf7zflguf6nbnqt3q

A Survey of Mobile WiMAX IEEE 802.16m Standard [article]

Jha Rakesh, Wankhede Vishal A., Upena Dalal
2010 arXiv   pre-print
IEEE 802.16m amends the IEEE 802.16 Wireless MAN-OFDMA specification to provide an advanced air interface for operation in licenced bands.  ...  In this paper we provide an overview of the state-of-the-art mobile WiMAX technology and its development.  ...  In the same mode for uplink, one slot is fourteen subcarriers (one uplink subchannel) for two OFDM symbols duration.  ... 
arXiv:1005.0976v1 fatcat:az6ox7vtkveldpailkqf27a6sy

Mobile WiMAX systems: performance and evolution

Fan Wang, Amitava Ghosh, Chandy Sankaran, Philip Fleming, Frank Hsieh, Stanley Benes
2008 IEEE Communications Magazine  
Mobile WiMAX was successfully adopted by ITU as one of the IMT-2000 technologies in November 2007. Since then mobile WiMAX (a.k.a.  ...  Mobile WiMAX is an OFDM-based technology available for deployment today, and new WIMAX devices come to market at much reduced cost than that of current 3G solutions.  ...  For frequency- specific subchannelization, IEEE 802.16e supports downlink and uplink band AMC (B-AMC).  ... 
doi:10.1109/mcom.2008.4644118 fatcat:ervtzgrvcbfk5opphpzyvq3g2m

A Survey on Mobile WiMAX [Wireless Broadband Access]

Bo Li, Yang Qin, Chor Low, Choon Gwee
2007 IEEE Communications Magazine  
In this article we provide an overview of the state-of-the-art mobile WiMAX technology and its development. We focus our discussion on QoS provisioning and mobile WiMAX specification.  ...  Since 2001 WiMAX has evolved from 802.16 to 802.16d for fixed wireless access, and to the new IEEE 802.16e standard with mobility support.  ...  A variant of the standard, IEEE 802.16a-2003, approved in April 2003, can support non-LOS (NLOS) transmission and adopts OFDM at the PHY layer.  ... 
doi:10.1109/mcom.2007.4395368 fatcat:5qbmzmudgbc4dp4uaqsqowng7q

A REVIEW ON OVERVIEW OF WORLDWIDE INTEROPERABILITY FOR MICROWAVE ACCESS (WIMAX) INNOVATION AND ITS FUTURE UTILIZATIONS

Savita Yadav, Kapil Kumar, Rashmi .
2018 ICTACT Journal on Communication Technology  
The unique architecture of the WiMAX MAC and PHY layer that uses OFDMA to allocate multiple channels with different modulation schemes.  ...  By comparing WiMAX with the popular Wi-Fi, 3G and LTE in the market, it analyzes the current situation and future development trend of WiMAX in terms of the difference in technology and applications.  ...  WIMAX AS A METRO-ACCESS FIXED (IEEE 802.16D) Fixed WiMAX is the 802.16d standard or as it is sometimes called 802. .  ... 
doi:10.21917/ijct.2018.0256 fatcat:7umyscu37vgb3ghmqy6enuyxgu

The WiMAX PHY Layer [chapter]

Marcel O., Amimo P.O.
2012 Digital Communication  
Brief of IEEE 802.16 PHY A functional WiMAX PHY Layer is represented by PHY Propagation Operation Freq Band Carrier Duplexing WirelessMAN SC LOS P2P 10-66 GHz Single T/FDD WirelessMAN SCa  ...  The sum effect of subchannelization is that the link budget is greatly enhanced by allocating each subscriber one or several portions of the overall bandwidth and NOT the entire channel bandwidth.  ... 
doi:10.5772/31682 fatcat:vay4fgbxkrepvcgnrxxl5d347m

Design and implementation of an OFDMA-TDD physical layer for WiMAX applications

Ángel Carro-Lagoa, Pedro Suárez-Casal, José A García-Naya, Paula Fraga-Lamas, Luis Castedo, Antonio Morales-Méndez
2013 EURASIP Journal on Wireless Communications and Networking  
The architecture allows for the implementation of all TDD functionalities in the downlink and the uplink at both the base station and the mobile station.  ...  TDD PHYs.  ...  Figure 1 shows the basic building blocks of an IEEE 802.16e transmitter. In the TDD mode, each frame contains one downlink subframe and one uplink subframe, and both use OFDM modulation.  ... 
doi:10.1186/1687-1499-2013-243 fatcat:dj2szil6pvhk5j3hoaxfp3gvhe

Fast Networks as a Candidate for LTE-Advanced Networks

A. Miyim
2013 The Smart Computing Review  
The focus is on the mobile WiMAX (IEEE 802.16m) specifications, salient features of layer 1 (PHY layer) and layer 2 (data link layer), with emphasis on the MAC sub-layer of the internet layer protocol  ...  WiMAX, a technology that is based on the IEEE 802.16 standard air interface, is said to be a potential candidate for next generation (4G) wireless mobile systems.  ...  The uplink (UL) and downlink (DL) of the IEEE 802.16e frame varies in size and is divided in time by an OFDMA symbol [21] .  ... 
doi:10.6029/smartcr.2013.02.003 fatcat:e45jol6h5fbm7lifjd2yrldqce

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

Chakchai So-In, Raj Jain, Abdel-Karim Tamimi
2009 IEEE Journal on Selected Areas in Communications  
IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users.  ...  In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions.  ...  Wood, Michael Roche and Ritun Patney, who participated earlier in the WiMAX Scheduling research at the Washington University, for their direct and indirect contributions to our understanding of the issues  ... 
doi:10.1109/jsac.2009.090207 fatcat:judytizruvdejk7x5oizz2oxby

Scheduling Mechanisms with Call Admission Control (CAC) and an Approach with Guaranteed Maximum Delay for [chapter]

Eden Ricardo, Walter Godoy, Augusto Foro
2012 Quality of Service and Resource Allocation in WiMAX  
To allow non-line of sight (NLOS) communication, IEEE 802.16 designed the Orthogonal Frequency Division Multiplexing (OFDM) PHY, popularly known as IEEE 802.16d and used in this work, and designed for  ...  Fig. 1 . 1 IEEE 802.16 network architecture Fig. 2 .Figure 3 23 IEEE 802.16 frame structure 63 Fig. 3 . 633 OFDM frame structure with TDD Fig. 4 . 4 IEEE 802.16 PHYs: SC, OFDM and OFDMA (the  ...  This book is intended for readers interested in resource allocation and quality of service in wireless environments, which is known to be a complex problem.  ... 
doi:10.5772/27825 fatcat:p74voebgjzclpexliv5zhfffaq

A Survey on Scheduling in IEEE 802.16 Mesh Mode

Miray Kas, Burcu Yargicoglu, Ibrahim Korpeoglu, Ezhan Karasan
2010 IEEE Communications Surveys and Tutorials  
The standard mainly focuses on the MAC and PHY layer issues, supporting two transmission modes: PMP (Point-to-Multipoint) and mesh modes.  ...  In 802.16 MAC protocol, mesh mode slot allocation and reservation mechanisms are left open which makes this topic a hot research area.  ...  Both in IEEE 802.16d and IEEE 802.16e, there is support for an optional mesh topology. Yet, mesh extension is only defined for OFDM air interface; it is not available for the OFDMA interface.  ... 
doi:10.1109/surv.2010.021110.00053 fatcat:udbxjff74rfp7fcn7y6qg64mwu

Wireless Communication and Security in Wimax

Fazil Sarfaraz
2012 IOSR Journal of Electronics and Communication Engineering  
This paper describes strategy of WiMAX and security mechanisms used in it.  ...  In this, WiMAX 802.16e is one possibly technology supporting data security. It uses different authentication and authorization protocols between the client and agent.  ...  Other parameters, such as number of subchannels, OFDM guard time, and oversampling rate, also have an impact.  ... 
doi:10.9790/2834-0222229 fatcat:yikopjlitzf5hop3rxv4l4mipe

Performance Characteristics of an Operational WiMAX Network

James M. Westall, James J. Martin
2011 IEEE Transactions on Mobile Computing  
The term WiMAX is used to refer to a collection of standards, products, and service offerings derived from the IEEE 802.16 family of standards for metropolitan area wireless networks.  ...  A significant body of published research in the WiMAX domain exists, but the focus of much of it is on the use of analytic or simulation models to evaluate aspects of physical layer protocols, medium access  ...  The equipment described in this paper is compliant with the IEEE 802. 16-2004 standard [1] which is sometimes called IEEE 802.16d or "fixed WiMAX" because it does not support seamless handoff for  ... 
doi:10.1109/tmc.2010.226 fatcat:cpbpjh6f7vdvnfjdblqdk3oc6a

Wireless IPTV over WiMAX: Challenges and Applications

Francis E. Retnasothie, M. Kemal Ozdemir, Tevfik Yucek, Hasari Celebi, Joseph Zhang, Ranesh Muththaiah
2006 2006 IEEE Annual Wireless and Microwave Technology Conference  
We identify challenges and discuss ways to overcome them, especially those in medium access control (MAC), Physical Layer (PHY) and radio sub-systems.  ...  Taking advantage of these features, IPTV services can be designed, delivered, and managed cost effectively without compromising the video and audio quality.  ...  Viterbi decoder) as specified by IEEE 802.16d standard. The PHY supports BPSK, QPSK, QAM16, and QAM64 modulation types with different coding rates.  ... 
doi:10.1109/wamicon.2006.351905 fatcat:hv7yxhtadbcefgl553lunmvgsi

Scheduling and CAC in IEEE 802.16 Fixed BWNs: A Comprehensive Survey and Taxonomy

Ikbal Chammakhi Msadaa, Daniel Camara, Fethi Filali
2010 IEEE Communications Surveys and Tutorials  
The main objective of this paper is to provide a better understanding of the missing components to ensure QoS support in IEEE 802.16 fixed broadband wireless networks (BWNs), namely scheduling and connection  ...  IEEE 802.16 can provide quality of service (QoS) guarantees for heterogeneous classes of traffic with different QoS requirements.  ...  granted slots on a given subchannel do not exceed the number Uplink and Downlink in the unsatisfied demands of slots of this subchannel OFDMA Networks * The amount of bandwidth (slots) allocated per connection  ... 
doi:10.1109/surv.2010.033010.00038 fatcat:gzoqctsbtnfihcyglqboozewru
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