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wimax (802.16)
(1057 results)-
White Papers
Scheduling Algorithms for Multi-Carrier Wireless Data Systems
Sep 2007
The authors consider the problem of scheduling wireless data in systems such as 802.16 (WIMAX). Each scheduling decision involves constructing a frame of one or more time slots. Within each time...
Provided by Association for Computing Machinery
-
White Papers
Performance Analysis of TCP and UDP-Based Applications in a IEEE 802.16 Deployed Network
Sep 2011
In this paper, the authors focus on various experiments conducted to analyze the performance of Transmission Control Protocol (TCP) and Universal Datagram Protocol (UDP) based applications in a...
Provided by Indian Institute of Technology Bombay
-
White Papers
An Indexing Scheduler for Delay Constrainted Scheduling With Applications to IEEE 802.16
Sep 2007
The authors consider the problem of scheduling users on the downlink of a Time Division Multiplexed (TDM) system with constraints on the average packet delays over a fading wireless channel. Their...
Provided by Indian Institute of Technology Bombay
-
White Papers
Unified Framework for Synchronization and BS Identification in Cellular OFDM Systems
Mar 2008
This paper shows initial-synchronization techniques including the Base Station IDentification (BS ID) for the cellular Orthogonal Frequency Division Multiplexing (OFDM) downlink systems. The novel...
Provided by Korea Advanced Institute of Science and Technology
-
White Papers
Role of Channel Estimation in Physical Layer Protocol Design of OFDM Wireless Systems and Relay-Type Cooperative Communication
Jan 2011
The authors consider the role of physical-layer signal processing functions in the design of physical-layer protocols for OFDM point-to-point and relay-type cooperative wireless communication...
Provided by National Chiao Tung University
-
White Papers
Adaptive Data Transmission in Downlink MIMO-OFDM Systems With Pre-Equalization
Jun 2007
An optimization algorithm for finding user allocation, bit and power loading in the downlink of MIMO-OFDM systems is proposed. The algorithm represents a generalization of the well-known concepts...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Security Analysis of IEEE 802.16
Jun 2007
This paper analyzes some critical security issues in the family of IEEE 802.16 standard that has not been addressed so far. In particular two of the key features of the standard, the dynamic...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Training-Based Iterative Detection/Channel Estimation Scheme for Large Non-Orthogonal STBC MIMO Systems
Jan 2010
The authors presented the simulated BER performance of low-complexity detection of large non-orthogonal STBC MIMO systems in conjunction with a channel estimation scheme. The very good BER and...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
WIMAX/802.16 Broadband Wireless Networks
Mar 2010
WiMAX/802.16 is a kind of network providing IP-based broadband wireless access to infrastructure networks such as the Internet. The two main envisioned applications are Web access and voice over...
Provided by Carleton University
-
White Papers
Prioritized Access for Emergency Stations in Next Generation Broadband Wireless Networks
Dec 2009
The authors focus on the interference between mobile stations as they attempt to gain access to an OFDMA-based WiMAX/IEEE 802.16 network. They propose a set of strategies that enable base stations...
Provided by Carleton University
-
White Papers
Utility-Based Resource Allocation for Layer-Encoded IPTV Multicast in IEEE 802.16 (WiMAX) Wireless Networks
Jun 2007
In this paper, the authors propose a utility-based resource allocation scheme for layer-encoded IPTV multicast streaming service over IEEE 802.16 WiMAX networks. Unlike existing utility-based...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Low-Voltage Fully-Integrated CMOS Power Amplifier for Mobile WiMAX Subscriber Station
Mar 2010
The demand for Broadband Wireless Access (BWA) is growing exponentially today. WiMAX, an abbreviation for Worldwide Interoperability for Microwave Access, based upon the IEEE 802.16 standard, is...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Design of the Multicast Service for Mobile Users in the 802.16 Network Environment
Jan 2010
Middle-domain mobility management provides an efficient routing, low registration cost and handoff latency for layer 3 (IP layer) 802.16-based mobile network environment. In the middle-domain, the...
Provided by Reed Elsevier
-
White Papers
Adaptive Power Saving Strategy Based on Traffic Load in the IEEE 802.16e Network
Feb 2010
Previous works in IEEE 802.16e power saving mainly focused on standard Type I or Type II. The limitation of adopting Type I or Type II is discussed in the paper, and the idea of applying traffic...
Provided by National Chi Nan University
-
White Papers
A Zone-Based Bandwidth Allocation Protocol in WiMAX Multi-Hop Relay Networks
Jan 2011
For mobile multi-hop wireless network, IEEE 802.16j/MR network can not only supply large area wireless deployment, but also provide high quality network service to mobile users. In this paper, the...
Provided by National Chi Nan University
-
White Papers
A Clustering Technique of Load-Based Power Saving in the IEEE 802.16e Network
May 2011
Previous works in IEEE 802.16e power saving mainly focused on standard Type I or Type II power saving class. The limitation of adopting Type I or Type II was discussed in the authors' previous...
Provided by National Chi Nan University
-
White Papers
On Adaptive Contention Resolution Schemes for IEEE 802.16 BWA Systems
May 2009
According to the latest version of the IEEE 802.16 standard, the mandatory contention resolution method is the truncated binary exponential backoff, with the initial window size and the maximum...
Provided by Hindawi Publishing
-
White Papers
Comparison of the Link Budget With Experimental Performance of a WiMAX System
Nov 2009
The performance of different modulation schemes of a broadband fixed wireless 802.16 (WiMAX) systems in a sector is experimentally determined and compared to link budget calculations using...
Provided by Hindawi Publishing
-
White Papers
Adaptive Ranging Code Allocation Scheme in IEEE 802.16 Networks
Dec 2010
IEEE 802.16 uses the Code Division Multiple Access (CDMA) method as the channel access method to decrease the collision probability of data delivery. However, IEEE 802.16 does not regulate a...
Provided by Hindawi Publishing
-
White Papers
Applying FDTD to the Coverage Prediction of WiMAX Femtocells
Feb 2009
Femtocells, or home base stations, are a potential future solution for operators to increase indoor coverage and reduce network cost. In a real WiMAX femtocell deployment in residential areas...
Provided by Hindawi Publishing
-
White Papers
A Low-Complexity Transmission and Scheduling Scheme for WiMAX Systems With Base Station Cooperation
Aug 2010
This paper considers base station cooperation as an interference management technique for the downlink of a WiMAX network (IEEE 802.16 standard) with frequency reuse factor of 1. A low-complexity...
Provided by Hindawi Publishing
-
White Papers
Performance Evaluation of Uplink Delay-Tolerant Packet Service in IEEE 802.16-Based Networks
Feb 2011
The authors provide an analytical model for efficient dynamic capacity allocation in IEEE 802.16 wireless metropolitan area network, where the non-real-time traffic can utilize the bandwidth...
Provided by Hindawi Publishing
-
White Papers
Performance Optimization for Delay-Tolerant and Contention-Based Application in IEEE 802.16 Networks
Jun 2008
IEEE 802.16 standard suite defines the air interface specifications for fixed and mobile broadband access in wireless metropolitan area networks. Although the IEEE 802.16 MAC has been well defined...
Provided by Hindawi Publishing
-
White Papers
Planning of Efficient Wireless Access With IEEE 802.16 for Connecting Home Network to the Internet
Feb 2010
The emergence of IEEE802.16 wireless standard technology (WiMAX) has significantly increased the choice to operators for the provisioning of wireless broadband access network. WiMAX is being...
Provided by Hindawi Publishing
-
White Papers
Service Differentiation in OFDM-Based IEEE 802.16 Networks
Dec 2008
IEEE 802.16 network is widely viewed as a strong candidate solution for broadband wireless access systems. Various flexible mechanisms related to QoS provisioning have been specified for uplink...
Provided by Hindawi Publishing
-
White Papers
A MIMO-OFDM Testbed
Oct 2009
The design, implementation, and test of a real-time flexible 2×2 (Multiple Input-Multiple Output-Orthogonal Frequency Division Multiplexing) MIMO-OFDM IEEE 802.16 prototype are presented. For the...
Provided by Hindawi Publishing
-
White Papers
On MIMO-OFDM With Coding and Loading
May 2008
Orthogonal Frequency-Division Multiplexing (OFDM) with multiple transmit and multiple receive antennas (MIMO-OFDM) is considered a candidate for high-data rate communication in various existing...
Provided by Hindawi Publishing
-
White Papers
Fair Adaptive Bandwidth and Subchannel Allocation in the WiMAX Uplink
Dec 2008
In some modern communication systems, as it is the case of WiMAX, it has been decided to implement Demand Assignment Multiple Access (DAMA) solutions. End-users request transmission opportunities...
Provided by Hindawi Publishing
-
White Papers
Novel Approaches to Enhance Mobile WiMAX Security
Jul 2010
The IEEE 802.16 Working Group on Broadband Wireless Access Standards released IEEE 802.16-2004 which is a standardized technology for supporting broadband and wireless communication with fixed and...
Provided by Hindawi Publishing
-
White Papers
Utility-Based Resource Allocation for Layer-Encoded IPTV Multicast Service in Wireless Relay Networks
May 2011
IPTV multi-casting is an important service for residential users. In this paper, the authors explore how to allocate resources to different layer-encoded IPTV programs using multi-cast services in...
Provided by National Taiwan University
-
White Papers
IEEE802.16e Best Effort Performance Investigation
Jun 2007
IEEE 802.16 standard family enables the convergence of fixed and mobile broadband networks through a common wide area broadband access technology. With reference to the recent IEEE802.16e-2005...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Distributed Approach to Interference Mitigation Between OFDM-Based 802.16 Systems Operating in License-Exempt Spectrum
Jun 2007
An approach to mitigating interference between 802.16 license-exempt systems is proposed in this paper. More specifically, the approach focuses on solving problems which arise when two or more...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Outdoor Path Loss Models for IEEE 802.16 in Suburban and Campus-Like Environments
Jun 2007
Wireless Metropolitan Area Networks (WMANs) based on IEEE 802.16 standard are widely deployed to provide users with wireless network connectivity, anytime, anyplace. In particular IEEE 802.16...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Mobile Direction Assisted Predictive Base Station Switching for Broadband Wireless Systems
Jun 2007
Many Broadband Wireless Access (BWA) systems, such as IEEE 802.16e, support high-mobility users traveling at vehicular speeds. BWA systems capable of high data rates and low bit-error rates...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Evaluation of Grouping Strategies for an Hierarchical SDMA/TDMA Scheduling Process
Jun 2007
Adding SDMA capabilities to modern wireless communication systems like IEEE 802.16 WiMAX promises high system capacity gains but raises the problem of combining orthogonal medium access schemes...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Collision Model for the Bit Error Rate Analysis of Multicell Multiantenna OFDMA Systems
Jun 2007
A multicell system which supports multiple antennas and OFDMA modulation/access is considered in this paper as conforming IEEE 802.16-2005 standard. Focusing on the uplink, the system performance...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Hybrid Energy-Saving Algorithm Considering Silent Periods of VoIP Traffic for Mobile WiMAX
Jun 2007
Recent broadband wireless access systems apply Voice Over Internet Protocol (VoIP) for their voice services, so a Mobile Station (MS) requires an efficient energy-saving algorithm for VoIP...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
An Efficient Sleep Mode Management Scheme in IEEE 802.16e Networks
Jun 2007
In IEEE 802.16e networks, the mobility of Mobile Stations (MSs) induces that energy saving becomes an important issue for the battery-powered MSs to extend their operational lifetime. Based on the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Queueing Performance of IEEE 802.16 Random Access Protocol With Bulk Transmissions
Jun 2007
In this paper, the authors consider the queueing performance of a subscriber station for IEEE802.16e random access protocol with bulk transmissions which is allowed with an ARQ protocol according...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Fast Handover Scheme for Real-Time Applications in Mobile WiMAX
Jun 2007
Mobile WiMAX is one of the most promising technologies for broadband wireless communication. The IEEE 802.16e standard for Mobile WiMAX, the enhanced version of the IEEE 802.16 standard with...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Scheduler for Unsolicited Grant Service (UGS) in IEEE 802.16e Mobile WiMAX Networks
Jan 2011
One of the key features of the IEEE 802.16e Mobile WiMAX system is its strong Quality of Service (QoS). IEEE 802.16e Mobile WiMAX provides multiple QoS classes for voice, video, and data...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Variable Quantum Deficit Round Robin Scheduling for Improved Fairness in Multihop Networks
Jan 2011
To increase the coverage area, Multichip WiMAX networks are particularly useful without the need to deploy expensive base stations. One of the most common variants in Multihop WiMAX is the...
Provided by Andhra University
-
White Papers
A Wimax Solution for Real-Time Video Surveillance in Public Transport
Mar 2011
Video surveillance is a highly useful tool to the public transport authorities, which is now widely used as a measure to ensure passenger safety and security. While video surveillance application...
Provided by Edith Cowan University
-
White Papers
Effect of Hash Function on Performance of Low Power Wake Up Receiver for Wireless Sensor Network
Oct 2010
Next generation network will consist of different types of wireless networks like WSN, Wi-Fi, WiMAX, UMTS, LTE and etc. Wireless Sensor Network (WSN) finds unique and special application as...
Provided by NIT Kurukshetra
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Whitepapers
Cloud computing: Innovative solutions for test environments
Apr 2011
This whitepaper features valuable insights pertaining to cloud usage and implementation scenarios for test cloud environments. Includes helpful guidance and scenarios for IT Managers and CIOs...
Provided by IBM
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White Papers
Wi-Fi, WiMax and WCDMA a Comparative Study Based on Channel Impairments and Equalization Method Used
Mar 2009
The use of Vehicle-To-Vehicle (V2V) communication will be an integral part of Intelligent Transport Systems (ITSs), and work on ITS has been growing substantially in recent years. Some obvious...
Provided by Jadavpur University
-
White Papers
VLSI Architectures for WIMAX Channel Decoders
Dec 2009
WIMAX has gained a wide popularity due to the growing interest and diffusion of broadband wireless access systems. In order to be flexible and reliable WIMAX adopts several different channel...
Provided by Cornell University
-
White Papers
The Handover and Internetworking Capabilities of WiMAX MAC Layer
Feb 2011
In the last few years, the telecommunication industries' development has focused on an intensive use of broadband systems, which are characterized by high quality features. For this issue, new...
Provided by Islamic University
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Case Studies
Bulgarian Telco Pioneers Mobile Triple-Play Services Over WiMAX
Nov 2010
Max Telecom entered the telecommunications their business challenge is that rapidly and cost-effectively expand service coverage to all of Bulgaria with enable capacity for "Triple-Play" services...
Provided by Cisco Systems
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White Papers
CINR and N-Factor Dependent Fair Scheduling Algorithm for Mobile WiMAX
Nov 2009
IEEE 802.16/WiMAX, a broadband wireless access technique is a promising technology that supports both fixed and mobile users. The conventional scheduling algorithms in WiMAX have a policy to...
Provided by Academy Publisher
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White Papers
A New Approach to Improve the Efficiency of Distributed Scheduling in IEEE 802.16 Mesh Networks
May 2009
The recent standard for broadband wireless access networks, IEEE 802.16, which resulted in the development of metropolitan area wireless networks, includes two network organization modes: Point to...
Provided by Academy Publisher
-
White Papers
Analysis and Enhancement of Bandwidth Request Strategies in IEEE 802.16 Networks
Mar 2010
IEEE 802.16 based broadband wireless access network is considered as one of the most promising wireless access technologies. It employs a request/grant scheme in bandwidth allocation where each...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Bandwidth Recycling in IEEE 802.16 Networks
Mar 2010
IEEE 802.16 standard was designed to support the bandwidth demanding applications with Quality of Service (QoS). Bandwidth is reserved for each application to ensure the QoS. For Variable Bit Rate...
Provided by Iowa State University
-
White Papers
On the Goodput of TCP NewReno in Mobile Networks
May 2010
Next-generation wireless networks such as LTE and WiMax can achieve throughputs of several Mbps with TCP. These higher throughputs, however, can easily be destroyed by frequent handoffs, which...
Provided by Virginia Tech
-
White Papers
Exploiting Use of a New Performance Metric for Construction of Robust and Efficient Wireless Backbone Network
Apr 2010
In order to improve transmission throughput of a multi-hop wireless network, many efforts have been made in recent years to reduce traffic and hence transmission collisions by constructing...
Provided by Stony Brook University
-
White Papers
Optimum Network Coding for Delay Sensitive Applications in WiMAX Unicast
May 2009
MAC layer Random Network Coding (MRNC) was proposed in as an alternative to HARQ for reliable data transmission in WiMAX unicast. It has been shown that MRNC achieves higher transmission...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
OpenRoads: Empowering Research in Mobile Networks
Jun 2009
Many researchers are working on mobility management. Continued innovation and development in this area can naturally be expected. The authors anticipate rapid progress will be made in the areas of...
Provided by Stanford University
-
White Papers
OFDM Downlink Scheduling for Delay-Optimality: Many-Channel Many-Source Asymptotics With General Arrival Processes
Feb 2011
The authors consider the downlink of an OFDM system for supporting a large number of delay-sensitive users. The OFDM scheduling problem can be modeled as a discrete-time multisource multi-server...
Provided by Purdue University
-
White Papers
Integration of IEEE 802.21 Services and Pre-Authentication Framework
May 2010
IEEE 802.21 standard and its services address the challenges of seamless mobility for multi-interface devices. The authors focus on a proof-of-concept implementation that integrates IEEE 802.21...
Provided by Inderscience Enterprises
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White Papers
Mitigating DoS Attacks on the Paging Channel by Efficient Encoding in Page Messages
Aug 2009
Paging is an important mechanism for network bandwidth efficiency and mobile terminal battery life. It has been widely adopted by mobile networks, such as cellular networks, WiMax, and Mobile IP....
Provided by University of California
-
White Papers
Reinventing Healthcare Service Through M-Care Business Model: The Strategy Analysis of WiMAX Adoption
Aug 2007
To address the emerging issues of aging society, new technology creates many opportunities to solve the problem of care service and increases added-value in the digital family. Therefore, this...
Provided by Academy Publisher
-
White Papers
Creating Templates to Achieve Low Delay in Multi-Carrier Frame-Based Wireless Data Systems
Jan 2008
The authors consider the problem of creating template-based schedules for multi-carrier frame-based wireless data systems such as 802.16 (Wimax). A template consists of an assignment of carriers...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Performance Characteristics of an Operational WiMAX Network
Mar 2010
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 wireless networks. These standards define...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Multimedia Wireless Transmission With Network Coding
Sep 2007
In recent years, Wireless Local Area Networks (WLAN) have become the premier choice for many homes and enterprises. WiMAX (Worldwide Interoperability for Microwave Access) has also emerged as the...
Provided by Oregon State University
-
White Papers
Phase Noise Effects on Signal Detection for Uwb/wimax Coexistence
May 2008
After the Federal Communications Commission (FCC) authorized the unlicensed use of the frequency band between 3.1 to 10.6 GHz for UWB communication systems, interference problems became a concern....
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Drizzle: Cooperative Symbol-Level Network Coding in Multi-Channel Wireless Networks
Jan 2010
Errors are inherently present in unreliable wireless channels. The primary challenge in designing error control protocols in the MAC or physical layer is to effectively maximize achievable...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On the Convergence of Wired and Wireless Access Network Architectures
Aug 2009
Wired and wireless access networks continue to evolve toward higher-capacity, multi-service systems. Recent wireless broadband networks such as 3G LTE and WiMax provide a general-purpose IP...
Provided by Massachusetts Institute of Technology
-
White Papers
Intelligent GIS-Based Road Accident Analysis and Real-Time Monitoring Automated System Using WiMAX/GPRS
Mar 2008
It has been a big concern for many people and government to reduce the amount of road accidents especially in Malaysia since it could be a big threat to this country. Malaysian government has...
Provided by University Putra Malaysia
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White Papers
Mobile WiMAX: Multi-Cell Network Evaluation and Capacity Optimization
Jan 2009
The performance of a mobile WiMAX system is highly dependent on the application environment. Local clutter has a significant impact on the path loss exponent and the observed multipath statistics....
Provided by University of Bristol
-
White Papers
Analyzing WLANs Standards for Wireless Sensor Network
Jan 2011
Wireless sensor network is a special kind of wireless network, design to communicate with distributes wireless nodes (Which supplies the information). Data collection from leaf sensor node to the...
Provided by Kurukshetra University
-
White Papers
Communication Protocol Engineering and Optimization of Network Entry Process in IEEE 802.16 Based Systems
Apr 2009
The improvement of the communication systems is conducted through communication protocol engineering and optimization process. This paper presents an effort to upgrade the IEEE 802.16 and IEEE...
Provided by Ss. Cyril and Methodius University in Skopje
-
White Papers
Admission Control and Interference-Aware Scheduling in Multi-Hop WiMAX Networks
Aug 2007
Multi-hop WiMAX networks based on IEEE 802.16 has the potential of easily providing high-speed wireless broadband access to areas with little or no existing wired infrastructure. WiMAX technology...
Provided by University of California, Davis
-
White Papers
Adaptive Scheduling of Prioritized Traffic in IEEE 802.16j Wireless Networks
Aug 2009
This paper proposes an adaptive scheduling algorithm for IEEE 802.16j based wireless broadband networks. Computation of an optimal schedule for prioritized traffic in OFDMA based IEEE 802.16...
Provided by University of California, Davis
-
White Papers
Reliable D-Cinema Multicasting Over Heterogeneous Networks
Aug 2007
This paper presents a packetization strategy for the reliable electronic distribution of Digital Cinema (DCinema, DC) content. In this paper, new experimental results and design improvements are...
Provided by Academy Publisher
-
White Papers
Overview of WiMAX Cellular Technology
Nov 2009
High cost of ICT (Information and Communication Technology) infrastructure leads to a gap between the developed countries and the least developed countries in terms of the access to information,...
Provided by University of Technology Sydney
-
White Papers
Optimization of Guard Time Length for Mobile WiMAX System Over Multipath Channel
Mar 2008
Guard Time length (GT) is one of the key OFDM parameters. It is implemented as Cyclic Prefix (CP) to completely alleviate InterSymbol Interference (ISI) and to preserve orthogonality among OFDM...
Provided by Universiti Teknologi Malaysia
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White Papers
Clustered Architecture for Adaptive Multimedia Streaming in WiMAX-Based Cellular Networks
Oct 2009
In the recent years, there has been an in-creasing demand for high quality multimedia services over wireless networks. Triple play services (voice, data and video) require data-rates of the order...
Provided by Dublin City University
-
White Papers
2-D Realization of WiMAX Channel Interleaver for Efficient Hardware Implementation
Jun 2009
The direct implementation of interleaver functions in WiMAX is not hardware efficient due to presence of complex functions. Also the conventional method i.e. using memories for storing the...
Provided by World Academy of Science, Engineering and Technology
-
White Papers
Low Complexity Multi Mode Interleaver Core for WiMAX With Support for Convolutional Interleaving
Feb 2009
Hardware efficient, multi mode, re-configurable architecture of interleaver/de-interleaver for multiple standards, like DVB, WiMAX and WLAN is presented. The interleavers consume a large part of...
Provided by World Academy of Science, Engineering and Technology
-
White Papers
A Packet Scheduling to Enhance Quality of Service in IEEE 802.16
Oct 2009
Wireless Broadband Network like the standardized IEEE 802.16, popularly referred to as WiMAX is known for its differentiation of Quality-of-Service (QoS) feature based on the traffic requirement....
Provided by San Diego State University
-
White Papers
An Indexing Scheduler for Delay Constrainted Scheduling With Applications to IEEE 802.16
Sep 2007
The authors consider the problem of scheduling users on the downlink of a Time Division Multiplexed (TDM) system with constraints on the average packet delays over a fading wireless channel. Their...
Provided by Indian Institute of Technology Bombay
-
White Papers
Unified Framework for Synchronization and BS Identification in Cellular OFDM Systems
Mar 2008
This paper shows initial-synchronization techniques including the Base Station IDentification (BS ID) for the cellular Orthogonal Frequency Division Multiplexing (OFDM) downlink systems. The novel...
Provided by Korea Advanced Institute of Science and Technology
-
White Papers
Role of Channel Estimation in Physical Layer Protocol Design of OFDM Wireless Systems and Relay-Type Cooperative Communication
Jan 2011
The authors consider the role of physical-layer signal processing functions in the design of physical-layer protocols for OFDM point-to-point and relay-type cooperative wireless communication...
Provided by National Chiao Tung University
-
White Papers
Adaptive Data Transmission in Downlink MIMO-OFDM Systems With Pre-Equalization
Jun 2007
An optimization algorithm for finding user allocation, bit and power loading in the downlink of MIMO-OFDM systems is proposed. The algorithm represents a generalization of the well-known concepts...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Security Analysis of IEEE 802.16
Jun 2007
This paper analyzes some critical security issues in the family of IEEE 802.16 standard that has not been addressed so far. In particular two of the key features of the standard, the dynamic...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Training-Based Iterative Detection/Channel Estimation Scheme for Large Non-Orthogonal STBC MIMO Systems
Jan 2010
The authors presented the simulated BER performance of low-complexity detection of large non-orthogonal STBC MIMO systems in conjunction with a channel estimation scheme. The very good BER and...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
WIMAX/802.16 Broadband Wireless Networks
Mar 2010
WiMAX/802.16 is a kind of network providing IP-based broadband wireless access to infrastructure networks such as the Internet. The two main envisioned applications are Web access and voice over...
Provided by Carleton University
-
White Papers
Prioritized Access for Emergency Stations in Next Generation Broadband Wireless Networks
Dec 2009
The authors focus on the interference between mobile stations as they attempt to gain access to an OFDMA-based WiMAX/IEEE 802.16 network. They propose a set of strategies that enable base stations...
Provided by Carleton University
-
White Papers
Utility-Based Resource Allocation for Layer-Encoded IPTV Multicast in IEEE 802.16 (WiMAX) Wireless Networks
Jun 2007
In this paper, the authors propose a utility-based resource allocation scheme for layer-encoded IPTV multicast streaming service over IEEE 802.16 WiMAX networks. Unlike existing utility-based...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Low-Voltage Fully-Integrated CMOS Power Amplifier for Mobile WiMAX Subscriber Station
Mar 2010
The demand for Broadband Wireless Access (BWA) is growing exponentially today. WiMAX, an abbreviation for Worldwide Interoperability for Microwave Access, based upon the IEEE 802.16 standard, is...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Design of the Multicast Service for Mobile Users in the 802.16 Network Environment
Jan 2010
Middle-domain mobility management provides an efficient routing, low registration cost and handoff latency for layer 3 (IP layer) 802.16-based mobile network environment. In the middle-domain, the...
Provided by Reed Elsevier
-
White Papers
Adaptive Power Saving Strategy Based on Traffic Load in the IEEE 802.16e Network
Feb 2010
Previous works in IEEE 802.16e power saving mainly focused on standard Type I or Type II. The limitation of adopting Type I or Type II is discussed in the paper, and the idea of applying traffic...
Provided by National Chi Nan University
-
White Papers
A Zone-Based Bandwidth Allocation Protocol in WiMAX Multi-Hop Relay Networks
Jan 2011
For mobile multi-hop wireless network, IEEE 802.16j/MR network can not only supply large area wireless deployment, but also provide high quality network service to mobile users. In this paper, the...
Provided by National Chi Nan University
-
White Papers
A Clustering Technique of Load-Based Power Saving in the IEEE 802.16e Network
May 2011
Previous works in IEEE 802.16e power saving mainly focused on standard Type I or Type II power saving class. The limitation of adopting Type I or Type II was discussed in the authors' previous...
Provided by National Chi Nan University
-
White Papers
On Adaptive Contention Resolution Schemes for IEEE 802.16 BWA Systems
May 2009
According to the latest version of the IEEE 802.16 standard, the mandatory contention resolution method is the truncated binary exponential backoff, with the initial window size and the maximum...
Provided by Hindawi Publishing
-
White Papers
Comparison of the Link Budget With Experimental Performance of a WiMAX System
Nov 2009
The performance of different modulation schemes of a broadband fixed wireless 802.16 (WiMAX) systems in a sector is experimentally determined and compared to link budget calculations using...
Provided by Hindawi Publishing
-
White Papers
Adaptive Ranging Code Allocation Scheme in IEEE 802.16 Networks
Dec 2010
IEEE 802.16 uses the Code Division Multiple Access (CDMA) method as the channel access method to decrease the collision probability of data delivery. However, IEEE 802.16 does not regulate a...
Provided by Hindawi Publishing
-
White Papers
Applying FDTD to the Coverage Prediction of WiMAX Femtocells
Feb 2009
Femtocells, or home base stations, are a potential future solution for operators to increase indoor coverage and reduce network cost. In a real WiMAX femtocell deployment in residential areas...
Provided by Hindawi Publishing
-
White Papers
A Low-Complexity Transmission and Scheduling Scheme for WiMAX Systems With Base Station Cooperation
Aug 2010
This paper considers base station cooperation as an interference management technique for the downlink of a WiMAX network (IEEE 802.16 standard) with frequency reuse factor of 1. A low-complexity...
Provided by Hindawi Publishing
-
White Papers
Performance Evaluation of Uplink Delay-Tolerant Packet Service in IEEE 802.16-Based Networks
Feb 2011
The authors provide an analytical model for efficient dynamic capacity allocation in IEEE 802.16 wireless metropolitan area network, where the non-real-time traffic can utilize the bandwidth...
Provided by Hindawi Publishing
-
White Papers
Performance Optimization for Delay-Tolerant and Contention-Based Application in IEEE 802.16 Networks
Jun 2008
IEEE 802.16 standard suite defines the air interface specifications for fixed and mobile broadband access in wireless metropolitan area networks. Although the IEEE 802.16 MAC has been well defined...
Provided by Hindawi Publishing
-
White Papers
Planning of Efficient Wireless Access With IEEE 802.16 for Connecting Home Network to the Internet
Feb 2010
The emergence of IEEE802.16 wireless standard technology (WiMAX) has significantly increased the choice to operators for the provisioning of wireless broadband access network. WiMAX is being...
Provided by Hindawi Publishing
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White Papers
Service Differentiation in OFDM-Based IEEE 802.16 Networks
Dec 2008
IEEE 802.16 network is widely viewed as a strong candidate solution for broadband wireless access systems. Various flexible mechanisms related to QoS provisioning have been specified for uplink...
Provided by Hindawi Publishing
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White Papers
A MIMO-OFDM Testbed
Oct 2009
The design, implementation, and test of a real-time flexible 2×2 (Multiple Input-Multiple Output-Orthogonal Frequency Division Multiplexing) MIMO-OFDM IEEE 802.16 prototype are presented. For the...
Provided by Hindawi Publishing
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White Papers
On MIMO-OFDM With Coding and Loading
May 2008
Orthogonal Frequency-Division Multiplexing (OFDM) with multiple transmit and multiple receive antennas (MIMO-OFDM) is considered a candidate for high-data rate communication in various existing...
Provided by Hindawi Publishing
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White Papers
Fair Adaptive Bandwidth and Subchannel Allocation in the WiMAX Uplink
Dec 2008
In some modern communication systems, as it is the case of WiMAX, it has been decided to implement Demand Assignment Multiple Access (DAMA) solutions. End-users request transmission opportunities...
Provided by Hindawi Publishing
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White Papers
Novel Approaches to Enhance Mobile WiMAX Security
Jul 2010
The IEEE 802.16 Working Group on Broadband Wireless Access Standards released IEEE 802.16-2004 which is a standardized technology for supporting broadband and wireless communication with fixed and...
Provided by Hindawi Publishing
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White Papers
Utility-Based Resource Allocation for Layer-Encoded IPTV Multicast Service in Wireless Relay Networks
May 2011
IPTV multi-casting is an important service for residential users. In this paper, the authors explore how to allocate resources to different layer-encoded IPTV programs using multi-cast services in...
Provided by National Taiwan University
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White Papers
IEEE802.16e Best Effort Performance Investigation
Jun 2007
IEEE 802.16 standard family enables the convergence of fixed and mobile broadband networks through a common wide area broadband access technology. With reference to the recent IEEE802.16e-2005...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Distributed Approach to Interference Mitigation Between OFDM-Based 802.16 Systems Operating in License-Exempt Spectrum
Jun 2007
An approach to mitigating interference between 802.16 license-exempt systems is proposed in this paper. More specifically, the approach focuses on solving problems which arise when two or more...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Outdoor Path Loss Models for IEEE 802.16 in Suburban and Campus-Like Environments
Jun 2007
Wireless Metropolitan Area Networks (WMANs) based on IEEE 802.16 standard are widely deployed to provide users with wireless network connectivity, anytime, anyplace. In particular IEEE 802.16...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Mobile Direction Assisted Predictive Base Station Switching for Broadband Wireless Systems
Jun 2007
Many Broadband Wireless Access (BWA) systems, such as IEEE 802.16e, support high-mobility users traveling at vehicular speeds. BWA systems capable of high data rates and low bit-error rates...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Evaluation of Grouping Strategies for an Hierarchical SDMA/TDMA Scheduling Process
Jun 2007
Adding SDMA capabilities to modern wireless communication systems like IEEE 802.16 WiMAX promises high system capacity gains but raises the problem of combining orthogonal medium access schemes...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Collision Model for the Bit Error Rate Analysis of Multicell Multiantenna OFDMA Systems
Jun 2007
A multicell system which supports multiple antennas and OFDMA modulation/access is considered in this paper as conforming IEEE 802.16-2005 standard. Focusing on the uplink, the system performance...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Hybrid Energy-Saving Algorithm Considering Silent Periods of VoIP Traffic for Mobile WiMAX
Jun 2007
Recent broadband wireless access systems apply Voice Over Internet Protocol (VoIP) for their voice services, so a Mobile Station (MS) requires an efficient energy-saving algorithm for VoIP...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
An Efficient Sleep Mode Management Scheme in IEEE 802.16e Networks
Jun 2007
In IEEE 802.16e networks, the mobility of Mobile Stations (MSs) induces that energy saving becomes an important issue for the battery-powered MSs to extend their operational lifetime. Based on the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Queueing Performance of IEEE 802.16 Random Access Protocol With Bulk Transmissions
Jun 2007
In this paper, the authors consider the queueing performance of a subscriber station for IEEE802.16e random access protocol with bulk transmissions which is allowed with an ARQ protocol according...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Fast Handover Scheme for Real-Time Applications in Mobile WiMAX
Jun 2007
Mobile WiMAX is one of the most promising technologies for broadband wireless communication. The IEEE 802.16e standard for Mobile WiMAX, the enhanced version of the IEEE 802.16 standard with...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
VNTS: A Virtual Network Traffic Shaper for Air Time Fairness in 802.16e Systems
Feb 2010
The 802.16e standard for broadband wireless access mandates the presence of QoS classes, but does not specify guidelines for the scheduler implementation or mechanisms to ensure air time fairness....
Provided by Rutgers University
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White Papers
Performance Evaluation of Triple Play Services Delivery with E2E QoS Provisioning
Jun 2010
The creation and wide use of new high quality demanding services (VoIP, High Quality Video Streaming) and the delivery of them over already saturated core and access network infrastructures have...
Provided by Hindawi Publishing
