Concordia dives into 802.11n pool
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Concordia University likes to have the newest technologies to keep up with its students, but its move to faster 802.11n Wi-Fi is viewed as evolutionary, rather than revolutionary.
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George Washington University wants to allow mobile workers -- and even students -- to call wirelessly over Wi-Fi and cellular networks, and has a test project using Nokia and Avaya under way.
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Nowhere is wireless network reliability, coverage and speed more important than in healthcare applications.  Columnist Craig Mathias says new-generation WLAN systems are up to the task.
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Corporate wireless networking specialist Aruba this week unveiled what it calls a new architecture for enterprise WLANs: the Wi-Fi grid.
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Courtesy of 'metamaterial' antennae CES Netgear today launched a raft of 802.11n Wi-Fi networking devices that take the technology into the uncrowded 5GHz band. The new kit also incorporates clever new âmetamaterialâ antennae to cram up to eight aerials inside each box.â¦
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A new version of LocationFree TV can be streamed across 802.11a/b/g networks, although 11b streaming will require a strong signal for success.
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Meat wagons hitched to wireless bandwagon
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Analysis Prospects bright in the Wi-Fi arena
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UK city Norwich is pioneering a free, wi-fi project to see how people can use wireless internet.
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T-Mobile USA has inked a deal to deliver Wi-Fi access to Accor Hotels&#39; Red Roof Inns. Separately, Colubris Networks has been tapped by i-Hotel International to help it deliver high-speed wireless access to hotels across Canada.
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(InfoWorld) - The Wi-Fi connection on Apple's recently releasedÂ iPhoneÂ seems to be the source of a big headache for network administrators at Duke University. The built-in 802.11b/g adapters on several iPhones periodically flood sections of the Durham, N.C. school's pervasive wireless LAN with MAC address requests, temporarily knocking out anywhere from a dozen to 30 wireless access points at a time. Campus network staff are talking with Cisco, the main WLAN provider, and have opened a help desk ticket with Apple. But so far, the precise cause of the problem remains unknown. "Because of the time of year for us, it's not a severe problem," says Kevin Miller, assistant director, communications infrastructure, with Duke's Office of Information Technology. "But from late August through May, our wireless net is critical. My concern is how many students will be coming back in August with iPhones? It's a pretty big annoyance, right now, with 20-30 access points signaling they're down, and then coming back up a few minutes later. But in late August, this would be devastating." That's because the misbehaving iPhones flood the access points with up to 18,000 address requests per second, nearly 10Mbps of bandwidth, and monopolizing the AP's airtime. The access points show up as "out of service." For 10-15 minutes, there's no way to communicate with them, Miller says. "When the problem occurs, we see dozens of access points in that condition," Miller says. The network team began capturing wireless traffic for analysis and that's when they discovered that the offending devices were iPhones. Right now, Miller says, there are about 150 of the Apple devices registered on the campus WLAN. The requests are for what is, at least for Duke's network, an invalid router address. Devices use the Address Resolution Protocol (ARP) to request the MAC address of the destination node, for which it already has the IP address. When it doesn't get an answer, the iPhone just keeps asking. "I'm not exactly sure where the 'bad' router address is coming from," Miller says. One possibility: each offending iPhone may have been first connected to a home wireless router or gateway, and it may automatically and repeatedly be trying to reconnect to it again when something happens to the iPhone's initial connection on the Duke WLAN. They're still sorting out what that "something" is. On two occasions, one last Friday and one today, Monday 16 July, both users seemed to be behaving completely normally, yet both iPhones started flooding the net with ARP requests. In both cases, the user first successfully connected to the WLAN at one location, and then moved to another building, where the ARP flood began. "It may have something to do with the iPhone losing connectivity and then trying to reconnect in a new location," Miller says. Most of the W LAN is comprised of Cisco thin access points and controllers. Some older autonomous Cisco Aironet access points tend to uncover the flooding first, since they try to resolve the ARP request themselves. But Miller's team has seen the CPU utilization on the WLAN controllers spiking as they try to process the request flood passed on to them in control traffic from the thin access points. "I don't believe it's a Cisco problem in any way, shape, or form," he says firmly. So far, the communication with Apple has been "one-way," Miller says, with the Duke team filing the problem ticket. He says Apple has told him the problem is being "escalated" but as of mid-afternoon Monday, nothing substantive had been heard Apple.
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This weekâs Wi-Fi Planet Conference and Expo will highlight the increasing variety and sophistication of WLAN technology for the enterprise.
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The University of Calgary in Alberta is on its way to achieving of deploying 1,500 wireless access points with plans  for an even more ambitious deployment that would allow staff and students to carry their wireless access over to other institutions.
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The company is adding the 802.1x security standard throughout its hot-spot network.
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The 802.11n draft wireless standard moved further into mainstream acceptance on Tuesday with Cisco&#39;s announcement of integrated enterprise products.
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Long-range wireless networking technology draws market interest as low-cost service.
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Missouri's Lincoln University has deployed Alcatel-Lucent's higher education offering to transform its campus-wide communications network. The new network enables the university to offer a secure, 'always on' learning environment, and streamline communications among administrators and staff.