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Multicast With Wireless LAN Controllers (WLCs) and Lightweight Access Points (LAPs) Configuration Example [ Source: Cisco ]
January 2008-This paper provides a configuration example on how to configure Wireless LAN Controllers (WLCs) and Lightweight Access Points (LAPs) for multicasting and communication with a multicast enabled wired network. Lightweight Access Point Protocol (LWAPP) tunnel to each access point (AP) connected to the controller. Each multicast frame received by the controller from a VLAN on the first hop router was copied and sent over the LWAPP tunnel to each of the APs connected to it. ....

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AT Command Set - M1HS, N501HS, H600 [ Source: acer ]
January 2008-This document discusses, in detail, the AT commands that are implemented in ONDA M1HS, N501HS, H600 UMTS/GPRS wireless card. All the AT commands follow 3GPP (R99) TS27.005 and TS27.007.

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WLAN Tracker: Location Tracking and Location Based Services in Wireless LANs [ Source: Novatica ]
January 2008-Recent technologies have brought about a drastic increase in the quality and speed of wireless communication. Only two decades ago, push and talk systems were the dominating devices in this area; now, people are always connected to the global telephony system via either fixed or mobile GSM (Global System for Mobile communications) networks. This paper from Novatica describes a pure software based solution called WLAN (Wireless Local Area Network) Tracker which is based on signal ....

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Optimum Beamforming for Pre-FFT OFDM Adaptive Antenna Array [ Source: Institute of Electrical and Electronics Engineers ]
January 2008-This paper proposes a novel pre-fast Fourier transform (FFT) OFDM adaptive antenna array, which requires only one FFT processor at a receiver, for suppressing such delayed signals. Authors have derived the optimum weight set for beamformers based on the maximum signal-to-noise-and-interference power ratio (Max-SNIR) and the minimum mean square error (mmse) criteria, respectively. It also proposes a novel mmse-criterion-based commutative optimization scheme, which is more robust to the estimation error of the channel state information. ....

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CDMA 2000 EV-DO Revision B [ Source: Motorola ]
January 2008-CDMA2000 is a 3G technology consisting of voice and data traffic. Voice traffic is often referred to as CDMA 2000 1X and data as CDMA EV-DO. The CDMA 2000 delivers the maximum voice efficiency in the wireless industry, and EV-DO is clearly the market leader for high speed wireless mobile broadband. The movement through EV-DO Revisions 0, A, B and C provides the service provider with a cost effective means to upgrade the network capability. ....

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HP Auto Port Aggregation: Performance and Scalability White Paper [ Source: Hewlett-Packard ]
January 2008-HP Auto Port Aggregation is a software product that creates link aggregates, often called ""Trunks,"" which provide a logical grouping of two or more physical ports into a single ""fat pipe."" Two primary features are automatic link failure detection and recovery as well as support for load balancing of network traffic across all of the links in the aggregation. This white paper presents the exceptional performance and scalability testing results for the HP Auto Port ....

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Financial Assessment of Citywide Wi-Fi / WiMAX Deployment [ Source: Stevens Institute of Technology ]
January 2008-The Wi-Fi service industry is undergoing a fundamental shift towards ubiquitous Wi-Fi, with the onset of citywide Wi-Fi deployment. The deployment of municipal broadband networks has also been increasing in the United States, and the market for embedded Wi-Fi chips, including laptops, PDAs and mobile phones is growing. There are several ways by which a Wireless Internet Service Provider (WISP) can deliver city wide wireless broadband services. This paper proposes a service model (both data ....

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Web Services in the Retail Industry [ Source: Infosys Technologies ]
January 2008-Web services technology is a platform-neutral and the retail industry always works on razorthin margins and the key to survival lies in optimization of resources both in space and time dimensions as well as maximization of customer satisfaction. Access to timely and even real-time information to a wide variety of channel and trading partners, sales personnel, line managers, store managers etc. is the key to achieving this. In this paper, authors made an attempt to ....

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Birdstep Intelligent Mobile IP Client V2.0, Universal Edition Seamless Secure Mobility Across All Networks [ Source: Birdstep Technology ]
January 2008-The new Universal Mobility solution from Birdstep solves the key issue of mobilizing the standard VPN (Virtual Private Network) solution while turning it on only when the user is connecting from an external insecure network. This paper published by Birdstep Technology describes the new Universal Mobility solution that solves the key issue of mobilizing standard VPN solution while turning it on only when the user is connecting from an external insecure network. In this way, ....

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Profiles in Driver Distraction: Effects of Cell Phone Conversations on Younger and Older Drivers [ Source: Human Factors and Ergonomics Society ]
January 2008-The research examined the effects of hands-free cell phone conversations on simulated driving. The paper founds that driving performance of both younger and older adults was influenced by cell phone conversations. Compared with single-task conditions, when drivers used cell phones their reactions were 18% slower, their following distance was 12% greater, and they took 17% longer to recover the speed that was lost following braking. There was also a twofold increase in the number of ....

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Optimal Superimposed Pilot Selection for OFDM Channel Estimation [ Source: University of Melbourne ]
January 2008- Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient modulation scheme for high-bit-rate wireless communication over multipath fading channels. It is expected that OFDM will play a major role in next generation (B3G and 4G) mobile wireless systems. This research paper from University of Melbourne presents an optimal strategy for utilizing superimposed pilots for OFDM channel estimation using Wiener filtering. An algorithm is formulated to determine the optimal rectangular set of time-frequency samples for channel ....

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Cisco ITP MAP Gateway for Public WLAN SIM Authentication and Authorization [ Source: Cisco ]
January 2008- Global System for Mobile Communications (GSM) operators are recognizing the need for high-speed wireless data services. Cisco Systems has embarked on an effort to enable authentication of WLAN subscribers using the existing and well-proven GSM-based user authentication and existing GSM provisioning facilities. Cisco ITP MAP Gateway function enables existing GSM service providers to fully integrate 802.11 technology into their existing GSM network using subscriber-identity-mobile (SIM) cards. Cisco ITP MAP Gateway function enables a WLAN authentication ....

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Traffic-Aware Channel Assignment in Wireless LANs [ Source: University of Texas ]
January 2008- This research paper discusses how campus and enterprise wireless networks are increasingly characterized by ubiquitous coverage and rising traffic demands. Efficiently assigning channels to Access Points (APs) in these networks can significantly affect the performance and capacity of the wireless LAN. Several research studies have tackled this issue. However, even the state-of-the-art approaches assign channels without considering prevailing traffic demands. The channel assignment problem has a parallel in the wire-line world, where recent work has ....

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Troubleshooting WLAN Connectivity [ Source: Hewlett-Packard ]
January 2008- This paper from Hewlett-Packard provides information to help identify and troubleshoot common problems in a wireless LAN in which there is at least one Access Point (AP) connected to a wired LAN and one or more wireless stations. ProCurve wireless access points operate best when loaded with the most current version of software. Upgrade to the latest version of software early within the troubleshooting process.

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Airport Wireless LAN: Technology Survey and Simulation Tool Development [ Source: MITRE ]
January 2008- The 5000-5250 megahertz (MHz) frequency band is allocated to the Aeronautical RadioNavigation Service (ARNS) on an international basis. The 5030-5091 MHz portion is in use for Microwave Landing System (MLS) applications. The aviation community is exploring other applications in the 5091-5150 MHz band, referred to as C-band in this report, to support aeronautical applications. This paper documents a preliminary investigation on the applicability of the Wireless Local Area Network (WLAN) and cellular network technologies, for ....

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Spatial Multiplexing for Outdoor MIMO-OFDM Systems With Limited Feedback Constraint [ Source: Uppsala University ]
January 2008- Next generation mobile communication systems are expected to place stringent demands for high quality and high data rates over mobile radio channels. Recent studies on Multiple Input Multiple Output (MIMO) antenna systems with Orthogonal Frequency Division Multiplexing (OFDM) signaling have shown that spatial-frequency parallel processing at both transmitter and receiver, combined with fast adaptive transmission, is able to provide significant increases in spectral efficiency. This research paper from Uppsala University proposes a spatial multiplexing technique ....

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Space-Time-Frequency Transmit Diversity in Broadband Wireless OFDM Systems [ Source: DoCoMo Euro-Labs ]
January 2008- This paper published by DoCoMo Euro-Labs considers space-time - frequency transmits diversity with orthogonal designs in a broadband OFDM system. On capacity considerations for Gaussian as well as real world signal constellations, it show that the concatenation of an outer error control code, a bit interleaver and orthogonal spatial transmit diversity provides an attractive MIMO scheme which is robust to channel imperfections such as spatial correlation. It proposes an application of orthogonal designs for space-time-frequency ....

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Diversity Reception for OFDM Systems Using Antenna Arrays [ Source: Institute of Electrical and Electronics Engineers ]
January 2008- Antenna arrays are a powerful means to exploit the spatial domain to provide an extra layer of co-channel interference cancellation and new ways of handling unwanted channel effects for more efficient utilization of spectrum and space at any time. This provides space diversity in multi path channels, making it possible to realize high transmission rates envisioned for the next generation wireless communications. In this paper, a diversity reception algorithm is proposed for Post-FFT OFDM systems ....

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A WLAN Without Controllers [ Source: TechWeb TV ]
June 2008- Aerohive uses distributed control protocols to join access points together without the need for complex and costly controllers. It's eaier to deploy and more scalable and less expensive than a controller-based architecture. It's useful for Voice over Wireless LAN or 802.11n networks.

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Startup City TV: Ruckus Wireless [ Source: TechWeb TV ]
June 2008- InformationWeek's John Foley sits down with David Callisch, VP of marketing for Ruckus Wireless, to discuss Ruckus' smart antenna system

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WPA2 Security: Choosing the Right WLAN Authentication Method [ Source: Global Knowledge ]
October 2008- Ask a hundred CIOs what three things about WLANs (wireless LANs) strike fear into their hearts, and the answers are likely to be similar: Security, Security, and Security. Sure, you want good coverage. Sure, you want to minimize drops. But the only way an executive is likely to lose their job over a wireless network is if they end up like the folks at The TJX Companies, who saw millions of credit card numbers stolen ....

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Aruba Co-Founder Keerti Melkote On Life After IPO [ Source: TechWeb TV ]
June 2008- Melkote also explores how its approaching 802.11n, and why the controllers are the key. He also defends a centralized apporach to controllers.

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Elevator Pitch: Ruckus Wireless [ Source: TechWeb TV ]
June 2008- We sit down with David Callisch, VP of marketing for Ruckus Wireless, which makes WLAN gear designed help SMEs make the most of their wireless systems via smart antennae and QoS software.

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Startup City TV: Ruckus Wireless [ Source: TechWeb TV ]
June 2008- InformationWeek's John Foley sits down with David Callisch, VP of marketing for Ruckus Wireless, to discuss Ruckus' smart antenna system

[VIDEO]

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A WLAN Without Controllers [ Source: TechWeb TV ]
June 2008- Aerohive uses distributed control protocols to join access points together without the need for complex and costly controllers. It's eaier to deploy and more scalable and less expensive than a controller-based architecture. It's useful for Voice over Wireless LAN or 802.11n networks.

[VIDEO]

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The Buzz On Distributed Wireless Architecture [ Source: TechWeb TV ]
June 2008- Aerohive takes a different approach to WLAN infrastructure. They implement a distributed control architecture that elimates the controller. Wireless is moving from data to voice, to 802.11n and mission-critical apps. By eliminating controllers, you eliminate single points of failure.

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For Wireless LANs, New Convergence Possibilities [ Source: TechWeb TV ]
June 2008- With fixed-mobile convergence a part of its roadmap for some years, wireless LAN provider Aruba -- the No. 2 provider of enterprise Wi-Fi systems behind Cisco -- is now trialing its FMC system running on Nokia E-series mobile devices. The company "is very focused on voice right now -- all forms of voice," says director of product marketing Peter Thornycroft. Early customers include enterprises with large premises that need wireless coverage, including hotels, hospitals, ....

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WiFi startup Aerohive disses controller based WiFi schemes [ Source: TechWeb TV ]
June 2008- Aerohive's approach to Enterprise WiFi bucks the trend of smart controllers managing dump access points. Similar to arguments made for smart wired edge switches, the vendor claims superior quality of service and security.

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Nortel Network Case Study: Dubai Silicon Oasis Authority (DSO) [ Source: Nortel Networks ]
January 2008- This paper from Nortel Networks provides a terabit cluster based on the Nortel Ethernet Routing Switch 8600 at the core. This delivers industry-leading reliability and active, sub-second resilience by ensuring that no single component failure is able to impact critical applications or services. Furthermore, it is flexible enough to allow for the rapid expansion of DSO’s business operations, while providing a solid foundation to support state-of-the-art multimedia applications that meet the evolving requirements of staff, ....

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Multicast With Wireless LAN Controllers (WLCs) and Lightweight Access Points (LAPs) Configuration Example [ Source: Cisco ]
January 2008- This paper provides a configuration example on how to configure Wireless LAN Controllers (WLCs) and Lightweight Access Points (LAPs) for multicasting and communication with a multicast enabled wired network. Lightweight Access Point Protocol (LWAPP) tunnel to each access point (AP) connected to the controller. Each multicast frame received by the controller from a VLAN on the first hop router was copied and sent over the LWAPP tunnel to each of the APs connected to it. ....

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