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Spectrum :: Spectrum 4.9 GHz 700 MHz


August 2007 | July 2007 | May 2007 | April 2007 | March 2007 | February 2007 | January 2007 | December 2006 | November 2006 | September 2006 | August 2006 | July 2006 |

Recent Entries

PacketHop Upgrades Video Options, Adds Hardware
Dallas Rolls Out Wireless Video Surveillance
Tropos Adds Public Safety Routers
BelAir Offers 4.9 GHz Support
Cheyenne Deploys 900 MHz, 4.9 GHz for Public Safety, Public Works
PacketHop Expands into 4.9 GHz, Cell with Software Tools

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Category: 4.9 GHz

March 29, 2007

PacketHop Upgrades Video Options, Adds Hardware

By Glenn Fleishman

PacketHop releases their Communication System 3.0, with new secured mobile video surveillance options; and hardware: The PacketHop system is aimed at first responders and others involved in public safety and general security. The latest system supports robust streaming video from surveillance systems for users as they move towards a scene of interest—what PacketHop dubs “drive-up surveillance.”

The company has also added two hardware devices. While originally a hardware firm with a software overlay, the company reorganized itself around applications that could run over many systems, using techniques to improve the quality of service and throughput. They’ve now introduced hardware again: the Mobile Router for vehicle access, which can handle up to three radios (802.11a/b/g, 4.9 GHz public safety, and cellular), and be used to broadcast video as well. The Mesh Exchange is a mesh node designed to connect to a video camera to push traffic to the rest of a network using 802.11a/b/g and/or 4.9 GHz.

Posted by Glennf at 11:28 AM | Comments (0) | TrackBack

March 19, 2007

Dallas Rolls Out Wireless Video Surveillance

By Glenn Fleishman

Firetide powers the mesh network in Dallas created by local firm BearCom for crime reduction: The system covers 30 percent of downtown with live video monitoring carried over mesh Wi-Fi connections. The system has 40 cameras, 32 Firetide mesh nodes, and seven long-range wireless bridges from BridgeWave. The system uses 4.9 GHz.

Posted by Glennf at 1:29 PM | Comments (0) | TrackBack

February 27, 2007

Tropos Adds Public Safety Routers

By Glenn Fleishman

The leading metro-scale equipment vendor Tropos moves into public safety: The firm’s wireless nodes are currently used more than any others by an order of magnitude in the US due to EarthLink’s adoption of Tropos as their standard for mesh/end-user deployment. Adding 4.9 GHz public-safety gear is a critical move as cities and public safety officials continue a broad trend of moving beyond simple municipal employee access and residential/visitor service with wireless networks.

Tropos released a series of 4.9 GHz routers, the Tropos 9000 family, which tie into their MetroMesh architecture for simulation, reporting, and management. The 9532 is dual-band (2.4/4.9 GHz) for fixed outdoor use; the 9432 is a mobile dual-band router; and the 9431 is a single-band 4.9 GHz node. The 9432 is designed to create a hotspot around a mobile vehicle in both 2.4 and 4.9 GHz, while also connecting to the mesh network in either band, with fallover from 4.9 GHz to 2.4 GHz.

The routers will ship in third quarter 2007.

Posted by Glennf at 2:39 PM | Comments (0) | TrackBack

August 9, 2006

BelAir Offers 4.9 GHz Support

By Glenn Fleishman

The mesh networking firm adds public safety radios: BelAir makes a modular system designed to handle multiple radios in a single enclosure and use a form of wireless switching among nodes to improve throughput across multiple potential paths. The press release is a tad vague on details like shipping date and whether the module is simply a plug-in option on its multi-radio systems.

Posted by Glennf at 3:40 PM | Comments (0) | TrackBack

August 8, 2006

Cheyenne Deploys 900 MHz, 4.9 GHz for Public Safety, Public Works

By Glenn Fleishman

An interesting mix of a network rolls out in Wyoming: Excelsio Communications and BIG Wireless used two categories of Alvarion gear to deploy municipal and public safety services, including centralized control of 100 traffic lights and providing map information to firefighters and utility workers. Eighty police officer and firefighters have in-vehicle access, as well.

Posted by Glennf at 2:26 PM | Comments (0) | TrackBack

PacketHop Expands into 4.9 GHz, Cell with Software Tools

By Glenn Fleishman

PacketHop releases version 2.0 with cell backhaul, 4.9 GHz support: PacketHop’s software platform is designed to allow those in public safety to work together without having a network nearby. The latest version of the software supports the increasingly popular and available 4.9 GHz radio cards that essentially port Wi-Fi into this coordinated, low-contention, higher-wattage frequency range. PacketHop 2.0 provides collaborative whiteboard, video sharing, and other tools useful in the field among any peers in a mesh of connections that can span thousands of feet. (PacketHop does not manufacture hardware; it’s an overlay product.)

When there’s cellular backhaul available on one of the connected devices, like a laptop with EVDO built in or an external card, the software can send video upstream with dynamic quality of service adjustments relative to the available uplink. Thus, you don’t get choppy video, but a lower frame rate or less resolution, which is far more useful. “Instead of trying to jam 30 frames per second through a 30 Kbps pipe, we can throttle those frames down,” said PacketHop’ chief executive and president Michael Howse in an interview last week.

Howse spoke to the benefits of 4.9 GHz and how it has started to flower with an increasing number of products appearing and license requests being made to the FCC by public safety entities. Howse said that PacketHop has been invested in the newer band for most of the firm’s history, and helped the push that led the FCC to allow 802.11 standards to be repurposed into this band. This has allowed the benefits of cheap Wi-Fi to lower costs in public safety wireless, and we’re just at the beginning of this.

Howse said that in their testing, they have seen ranges between two mobile nodes of thousands of feet. In one test, they reached 3,400 feet and “ran out of room on the road” to continue the test. “In any sort of realistic use case for our public-safety customers, 3,400 feet is something beyond what we ever expected when we started this business,” he said. Most clusters of use will be spread out over relatively short distances across city blocks, for instance.

With video being the primary application driver of interest right now, bandwidth is an issue for streaming that content among nodes and to commanders in the field. PacketHop says their software can facilitate 6 Mbps or faster connections over long distances. The 4.9 GHz band can reach these rates at long range because of the higher allowed wattage and the coordination by regional planning coordinators that ensure unique channels for different purposes across geographial areas. “It’s highly coordinated, and that really reduces any issues you may have during incidents and events. It’s the actual end users who are coordinating spectrum,” Howse noted.

PacketHop surveyed the over 700 entities that have submitted licensing requests across the country—some of these are as large as the entire state of Utah—over 87% have deployed service or plan to deploy service in that band within two years.

Howse said that PacketHop initially thought that they would be building out their software on top of hardware that would work in unlicensed 2.4 GHz and 5 GHz bands—souped-up Wi-Fi with high-gain antennas. It turned out, however, that their customers couldn’t achieve the kind of outdoor mobile performance they needed because of the noise floor in the band. Even with fixed outdoor nodes in good locations, they weren’t able to deliver on the video performance their customers required.

They put their eggs in the commoditization of 4.9 GHz, which is happening. Because most of their interest is in the field, PacketHop doesn’t find fixed 4.9 GHz access points of particular interest, although they can support them, partly because fixed APs in this band require waivers from the FCC to stay fixed for more than 12 months. The band is designed for temporary networks that appear and disappear, which is where peer-to-peer meshes fit in.

PacketHop, like so many technology companies, wants to get above the hardware level, of course, and have their customers never need to make decisions based on the limitations of their gear, another reason for the shift to 4.9 GHz. Howse said his customers don’t always understand multi-hop, mobile mesh routing and networking, but they “do understand what they want at an event or an incident is video, or they want multimedia mapping or messaging.”

Posted by Glennf at 10:44 AM | Comments (0) | TrackBack