Wireless Communication & Networks
Feb 20, 2012
What Exactly Is Wireless Bridge makes the communication possible?
is basically a tool that makes the communication possible between two or more network users, situated at much distance, without the use of any wires. Usually these networks are situated on either neighboring buildings. However, at times these networks can be situated in the same buildings itself. Given the proper line of sight and antenna these bridges can connect networks that are located even 30 miles apart from each other. These bridges, through the Ethernet port, can hook up to the wired network and duplicate that data to a far-off access point or network bridge through 802.11a/b/g wireless (Wi-Fi) protocol.
Point to Point Bridge
Wireless bridge devices generally work in pairs, one on each side of the “bridge”. This is also referred to as Point to Point bridging. A point to point (PTP) bridging connects two networks that are located at two different sites, usually a warehouse or remote building, through one wireless bridge in each site. A ptp bridging is quite simple to configure. In order to create a Point to Point Wireless bridging you need take into consideration the following factors:
Proper Line of Sight amid the two sites: to accomplish this you will be required to construct a tower or pole on your roof top.
Distance: The type of antenna that you will need – whether integrated antenna will suffice or an external antenna will be determined by the distance between the two locations.
Frequency: the frequency of the bridging will determine whether you will require an unlicensed (2.4, 5-5.8 GHz) band or a licensed band.
Wireless protocol: The types of Wireless protocol you will require also need a due consideration. Point to Point wireless bridge base on 802.11 standards will allow interoperability with the manufacturers of the other bridge. Whereas, protocol proprietary allow interoperability to a specific vendor.
The other aspects that need to be considered are different peripherals, type of wireless antenna, installation aspect, cost factor and so on.
A virtual reality system for the simulation and manipulation of wireless communication networks
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Wireless Sensor and Actuator Networks : Algorithms and Protocols for Scalable Coordination and Data Communication $116.57 No Synopsis Available |
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ZigBee Wireless Networks And Transceivers $36.79 ZigBee is a short-range wireless networking standard backed by such industry leaders as Motorola, Texas Instruments, Philips, Samsung, Siemens, Freescale, etc. It supports mesh networking, each node can transmit and receive data, offers high security and robustness, and is being rapidly adopted in industrial, control/monitoring, and medical applications. This book will explain the ZigBee protocol, discuss the design of ZigBee hardware, and describe how to design and implement ZigBee networks. The book has a dedicated website for the latest technical updates, ZigBee networking calculators, and additional materials. Dr. Farahani is a ZigBee system engineer for Freescale semiconductors Inc. The book comes with a dedicated website that contains additional resources and calculators: http://www.learnZigBee.com Table of Contents Chapter 1: ZigBeeT Basics Chapter 2: ZigBeeT / IEEE 802.15.4 Networking Examples Chapter 3: ZigBeeT / IEEE 802.15.4 Protocol Layers Chapter 4: Transceiver Requirements Chapter 5: RF Propagation, Antennas, and Regulatory Requirements Chapter 6: Battery Life Analysis Chapter 7: Location Estimating Using ZigBeeT Chapter 8: ZigBeeT Coexistence Chapter 9: Related Technologies Appendices KEY FEATURES * Provides a comprehensive overview of ZigBee technology and networking, from RF/physical layer considerations to application layer development. * Discusses ZigBee security features such as encryption. * Describes how ZigBee can be used in location detection applications. * Explores techniques for ZigBee co-existence with other wireless technologies such as 802.11 and Bluetooth. * The book comes with a dedicated website that contains additional resources and calculators: http://www.learnZigBee.com |
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Meru Networks Meru MC4100 Wireless LAN Controller MC4100 $5799.98 Meru Networks Meru MC4100 Wireless LAN Controller MC4100 |
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Proxim ORiNOCO AP-4000 Tri-Mode Access Point $519.99 ORiNOCO AP-4000 Tri-Mode Access Point (connectorized) – 8670-US Model Number: 8670-US Proxim ORiNOCO AP-4000 Broadband Wireless Wi-Fi Tri-Mode Access Point Orinoco AP-4000 Frequently Asked Questions Includes External Antenna Connectors for all bands (802.11a/bg) Proxim ORiNOCO Wireless Wi-Fi Access Point AP-4000 is Proxim’s highest performance wireless LAN solution. Proxim Orinoco Wireless Wi-Fi Access Point AP-4000 is memory-rich and pre-configured with tri-mode for automatic support of all 802.11a, 802.11b, 802.11g client types – perfect for evolving enterprise wireless data networks. Proxim ORiNOCO Wireless Wi-Fi AP-4000 Access Point delivers 802.11b/g and 802.11a operation at a moderate price point. Embedded diversity antennas featuring horizontal and vertical polarization for superior coverage. External antenna connectors for 802.11b/g. IEEE 802.11i compliant with AES encryption and 802.1x authentication using dynamic, rotating encryption keys. Rogue AP detection in both the 2.4 and 5 GHz bands proactively protects your network Quality of Service for latency sensitive voice and video applications using IEEE 802.11e. Next-Generation Proxim Wireless Access Point Brings QoS and Performance to Mid and Large-Size Enterprises Proxim ORiNOCO Wireless Wi-Fi Access Point AP-4000 balances enterprise-scale security, management and Quality of Service features with a moderate price point – and both 802.11a and 802.11b/g mode operation. The new, highperformance Proxim Orinoco Wireless Wi-Fi Access Point AP-4000 is the middle level solution in Proxim’s next-generation line of access points supporting enterprise voice and video applications. Proxim Orinoco Wireless Wi-Fi Access Point AP-4000 is perfect for mid- and large-size production Wi-Fi broadband networks. • Automatic, universal Wi-Fi client interoperability • 40 Mbps throughput with 802.11g and 802.11a simultaneous operation • Built-in rogue AP detection for both 802.11b/g and 802.11a access points • AP-to-AP communication for reaching areas without Ethernet wiring • Unique 802.11a scalability – external antenna connector for increased transmit distance • Twice the memory of competing APs, ensuring software upgrade capacity Secure, Multi-use Wi-Fi Network Proxim ORiNOCO Wireless Wi-Fi Access Point AP-4000 includes support for multiple security settings with a VLAN in addition to existing standards-based security. • Multiple security settings per VLAN, with up to 16 VLANs per radio • Security settings for multiple groups – so employees, guests and contractors now easily, securely share the same infrastructure Proactive Security Measures to Protect Your Network Proxim ORiNOCO Wireless Wi-Fi Access Points support the latest security standards, such as Wi-Fi Protected Access (WPA), and add proactive security measures. • Certified WPA for IEEE 802.1X mutual authentication • Dynamic per-user, per-session rotating keys • Rogue access point detection, no |
