Tag Archive for Wireless

LED Broadband Wireless is D-Light-ful

TEDGlobal has an intriguing presentation by Harald Haas who is developing a new type of light bulb that can access the Internet using light instead of radio waves. According to TEDGlobal, the professor of engineering at Edinburgh University, has been designing modulation techniques that pack more data onto existing networks, but his latest work leaps beyond wires and radio waves to transmit data via an LED bulb. The new technology will turn LED lights on and off, so fast the change is imperceptible to the human eye to enables data transmission without any noticeable change in room lighting.

The system, which he calls D-Light, and hopes to commercialize under the new VLC (Visible Light Communications) brand uses OFDM (orthogonal frequency division multiplexing), The article reports the signal can be picked up by simple receivers. As of now, Haas is reporting data rates of up to 10 MBPS (faster than a typical broadband connection), and 100 MBPS by the end of this year and possibly up to 1 GB in the future.

He says: “It should be so cheap that it’s everywhere. Using the visible light spectrum, which comes for free, you can piggy-back existing wireless services on the back of lighting equipment.”

“As well as revolutionizing internet reception, it would put an end to the potentially harmful electromagnetic pollution emitted by wireless internet routers and has raised the prospect of ubiquitous wireless access, transmitted through streetlights.

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LED-Fi Could Replace Wi-FiSo in 2008 Boston University under a National Science Foundation grant started this the research to piggyback data communications capabilities on low-power LEDs to make an LED light the equivalent of a Wi-fi access point.

Some of the advantages of this technology include:

  • Security: Since white light does not penetrate opaque surfaces such as walls, eavesdropping is not possible and should not extend beyond building perimeters like current Wi-Fi technology. It also requires line-of-sight which will allow the user to see where the data is going.
  • Green: The development of this new technology coincides with the switch from incandescent and compact fluorescent lighting to LEDs. LED lights consume far less energy than RF technology, making it possible to build a communication network without added energy costs and reducing carbon emissions over the long-term.

One down-side is that the technology seems to be a one-way (down) transmission.

Possible applications could include automotive safety be enabling car brake lights to alert the car behind or traffic signals could alert cars when they change.It could also have applications in indoor mobile location and positioning services.

What do you think?

Does D-Light have a future as a green, wireless access point light?

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Car Technology

GM Ventures Invests in Powermat

General Motors Xconomy – Detroit reports that GM Ventures, the Detroit automaker’s venture capital arm has invested $5 million in Powermat the Commerce Township, MI start-up. A multiyear, multimillion-dollar deal with Powermat gives General Motors (GM) exclusive rights to place the company’s portable-device charging technology in its cars for a year. according to Micky Bly, the company’s director of hybrid vehicles. The Chevy Volt and certain Cadillac models will be the first GM cars to the Powermat accessories. The New York Times reports that at this years CES GM demonstrated four wireless charging positions in the Chevy Volt.

GM Ventures has also invested in Indiana-based electric car startup Bright Automotive and Ann Arbor-based battery developer Sakti3. Also see this earlier post.

Car Theft by Antenna

MIT’s Technology Review reports that researchers at ETH Zurich in Switzerland have successfully attacked eight car manufacturers’ passive keyless entry and start systems. The researchers examined 10 car models from eight manufacturers. They were able to take all 10 by intercepting and relaying signals from the cars to their wireless keys because the key transmits its signals up to around 100 meters. The attack works no matter what cryptography and protocols the key and car use to communicate with each other.

Car keyless entryThe researchers tested a few scenarios. An attacker could watch a parking lot and have an accomplice watch as car owners as entered a nearby store. The accomplice would only need to be within eight meters of the targeted owner’s key fob, making it easy to avoid arousing suspicion. In another scenario, a car owner might leave a car key on a table near a window. An antenna placed outside the house was able to communicate with the key, allowing the researchers then to start the car parked out front and drive away.

The researchers concluded that manufacturers will need to add secure technology that allows the car to confirm that the key is in fact nearby.

New Standard for Automotive-Grade Wireless Modules

Sierra Wireless (SWIR) recently introduced what the firm calls, the industry’s first suite of embedded wireless technology modules designed specifically for automotive manufacturers. The Canadian firm is banking on the emerging trend to include telematics, infotainment, navigation assistance and remote diagnostics in new cars within the next few years according to an article on ITNewsLink.com. The firm believes these applications will need reliable built-in connections to cellular networks. The new Sierra Wireless modules will uses 2G and 3G network technologies and frequency bands used worldwide to provide the connectivity customers are demanding.

The manufacturer says these units are the first wireless modules developed from the ground up to achieve compliance with automotive specifications.  ITNewsLink.com says the Sierra Wireless AirPrime AR Series design encompasses:

  • Tolerance for up to 1,000 thermal shock cycles
  • Full certification with ISO 9001:2000 quality standards and ISO/TS 16949:2002 manufacturing processes
  • Extended operating temperature range from -40 to 85 degrees Celsius
  • Compliance with multiple automotive manufacturing and quality processes including AQPQ, PPAP, PCN, and 8D
  • Solder-down form factor and optional Embedded SIM to create a more reliable and less expensive solution
  • An open platform for customer application development, including dedicated APIs for telematics applications.

Wireless Car Sensors Vulnerable to Hackers

MIT’s Technology Review reports that hackers could “hijack” the wireless pressure sensors built into many cars’ tires, researchers have found. Criminals might then track a vehicle or force its electronic control system to malfunction, the University of South Carolina and Rutgers University researchers say. The team successfully hijacked two popular tire-pressure-monitoring systems (TPMS).

As automakers add more technology and computers to cars, and connect those computers to critical components, in-car systems will need to be secured against hackers, experts warn.

The systems tested by the South Carolina-Rutgers team had very little security in place–they mainly relied on the fact that the communications protocol is not widely published. “In doing TPMS this way, [automakers] have left the door open to wireless attackers,” says Travis Taylor, one of the researchers. The team could eavesdrop on communications and, in some circumstances, alter messages in-transit. That let the team give false readings to a car’s dashboard. They could also track a vehicle’s movements using the unique IDs of the pressure sensors, and even cause a car’s ECU to fail completely.

“Normally, these [attacks would] result in small problems,” Mr. Taylor says. “But I see practical danger and damage that can happen from TPMS exploitation.” “The security and privacy problems that the researchers identify in TPMS systems are likely just one among many that will challenge the automotive industry in the years to come,” says Stefan Savage, a UC San Diego professor of computer science and engineering.

Ford Installs Sync Software via Wi-Fi

Ford Sync The Detroit Bureau reports that Ford is the first automaker to use Wi-Fi to send software to vehicles along an assembly line. The automaker is sending infotainment software to Wi-Fi-enabled MYFord Touch-equipped vehicles like the Edge.

Ford installed  Wi-Fi technology at its Oakville, Ontario, plant where it builds the Ford Edge and Lincoln MKX. Next up for Wi-Fi updates will be the upcoming Ford Explorer, built in Chicago, and then plants that build the Focus around the world.

Wi-Fi capability eliminates the need for building, stocking multiple SYNC hardware modules, thus reducing manufacturing complexity and saving cost.  “Using wireless software installation via Wi-Fi, we can stock just one type of SYNC module powering MyFord Touch and loaded with a basic software package,” explained Sukhwinder Wadhwa, SYNC global platform manager. “We eliminate around 90 unique part numbers, each of which would have to be updated every time a change is made – this system really boosts quality control.”

“Turning an assembly plant – with steel beams everywhere and high-voltage cabling throughout; everything you could imagine that would interfere with a radio signal – into an access point that would achieve 100 percent success was a huge challenge,” Mr. Wadhwa said.

Wireless Gigabit

WiGig AllianceThe Wireless Gigabit Alliance has completed specs for a technology designed to deliver as much as 7 Gbps of wireless bandwidth in the 60 GHz band. The new technology, WiGig has the support of technology giants such as Intel, Broadcom and Atheros. The technology is expected to have enough capacity to deliver high-def video streams up to 10 meters. WiGig’s anticipated road map includes system certifications in 2010 and WiGig based products to market in 2011.

According to the WGA, WiGig is not  it’s not designed to replace 802.11 or Bluetooth, but rather supplement it. WiGig is a device to device (p2p) network and does not need a central hub or router that could easily turn into a congestion point. WiGig uses beamforming to extend its range beyond 10-meter range and will automatically switch to 802.11n WiFi.  “Our technology is backwards compatible with existing WiFi, and we fall back to 802.11n and 802.11g when we can’t connect at [7 Gbps] speeds,” Ali Sadri, told TechNewsWorld. “We’re based on 802.11, so our spec is not replacing WiFi but extending it to 10 to 20 times faster than WiFi.”

“By complementing WiFi and enabling multi-gigabit speeds, the versatile specification is a very significant achievement on the road to the next generation of wireless LAN products” says Craig Mathias, a Principal with the wireless and mobile advisory firm Farpoint Group.

It is reported that Intel, Broadcom and Atheros all have plans to integrate WiGig into WiFi chipsets. “Ultimately, the question is how many different kind of radios do you really need?” says Farpoint’s Mathias, “There’s not just competition from WiFi and wireless HD but also cellular technologies such as 3G, LTE or WiMax.” “A lot of people anticipate 60 GHz products that will include 2.4 and 5 GHz Wi-Fi as well,” said Bill McFarland, chief technology officer of Atheros, and a WiGig member. “I definitely think we can support tri-band at 65 nm,” he added.

WiGig will include protocol adaptation layers to support specific system interfaces including data buses for PC peripherals and display interfaces for HDTVs, monitors and projectors. WiGig will include advanced security and power management for WiGig devices. “We’re rapidly paving the way for the introduction of the next generation of high-performance wireless products – PCs, mobile handsets, TVs and displays, Blu-ray disc players, digital cameras and many more” said Doctor Ali Sadri of Intel and president and chairman of the Wireless Gigabit Alliance

The need for fast wireless data transfer plays into two big trends: the proliferation of multimedia and the increasing cable clutter than users have to deal with.  “NVIDIA recognizes the general market trend toward wire-free interfaces. Today, display interfaces are at an inflection point where the next generation solutions will feature wireless display connections for PCs, game consoles, notebooks and mobile devices with PC monitors and TVs,” said Devang Sachdev, Technology Marketing Manager at NVIDIA and WiGig Board Member.

The biggest knock against WiGig is that signals at 60 GHz get absorbed by oxygen, meaning they lose strength quickly. Steel or concrete walls nd even people in the room can degraded or stop the 60 GHz signal. However, Intel’s Sadri says there is a solution. A 60 GHz antenna is just 2.5 millimeters long,  small enough that a lot of them can be packed into even a thin TV set or a mobile handset. Put 32 antennas on the transmitting and receiving ends, and you can send enough steered beams to compensate for the losses the signal experiences over distance.

In the 60 GHz spectrum, WiGig is likely to  run into some competition. The IEEE is introducing a follow-up to 802.11n Wi-Fi standards called 802.11ad.  The IEEE 802.11ad standard will also be based on the 60 GHz spectrum but is not expected before 2012.  Mathias says, “The WiGig Alliance hopes to get a head start now and they might submit their standard to the 802.11ad group to be included in the specification.” The Wireless HD consortium also supports a third 60-gigahertz wireless networking plan for uncompressed HD video. Sony and Samsung are backers of  all three 60 GHz plans.

It is likely that IEEE 802,11ad and Wireless HD will find it hard to compete against a general-purpose WiGig standard that can do uncompressed wireless HD video and more.

Members of the WGA include:·

802.11n Ratified -Yawn

wifiReuters is reporting that today (09-11-09) the IEEE Standards Board has ratified the IEEE 802.11n™-2009 amendment. This vote ends a seven year effort to, “enable rollout of significantly more scalable WLANs that deliver 10-fold-greater data rates than previously defined while ensuring co-existence with legacy systems and security implementations” according the the IEEE. The 560-page document is scheduled to be published in mid-October 2009. Bruce Kraemer, Chair of the IEEE Wireless LAN Working Group said in a press release “The performance improvements achieved via IEEE 802.11n stand to transform the WLANieee_logo user experience, and ratification of the amendment sets the stage for a new wave of application innovation and creation of new market opportunities.”

Kelly Davis-Felner, marketing director of the Wi-Fi Alliance (WFA), told Network World that “The core interoperability is totally preserved with the [existing] draft certification program.”  Ms. Davis-Felner says,  ”Existing draft-11n products should work seamlessly with future products based on the final standard. No existing products will have to be retested in the updated certification program.”

Today’s ratification marks the high-point for other 802.11 wireless products. This approval will green-light the development and deployment of 11n products in the enterprise. There is no longer a reason for firms deploying greenfield WLAN’s to roll put anything but  802.11n.   The WFA expects  11n shipments to rise to 45% of all 802.11 shipments in 2009, and 60% in 2012 based on data from market researcher ABI Research, according to Davis-Felner. But how long will 802.11n last?

wigigNetworkWorld is reporting that Microsoft, Intel and other manufacturers have formed the  Gigabit Wireless Alliance (WiGig) to create anew wireless specification with a data speed of up to 6Gbps. WiGig is also actively involved with the IEEE’s 802.11ad task group. And if WiGig is to slow, James Buckwalter, a professor at the University of California San Diego has developed s a silicon-based amplifier that transmits 10Gbps wireless in 100 GHz frequency bands  according to NetworkWorld. Coverage could also be over a kilometer, which beats traditional WiFi’s 100 meters.

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The formal ratification of the IEEE 802.11n standard is a good thing. However we have been recommending that clients seriously consider this technology in greenfield installs with Wi-Fi approved 802.11n since the beginning of the year.

WPA Gone in 60 Seconds

securityJapanese researchers have identified a WPA hack which could give hackers a way to read encrypted Wi-Fi traffic  in less than 1 minute. Toshihiro Ohigashi (Hiroshima University) and Masakatu Morii (Kobe University) presented a way to break the WPA (Wi-Fi Protected Access) encryption system at the Joint Workshop on Information Security.  The researchers outlined their work in paper called “A Practical Message Falsi cation Attack on WPA“  on August 7, 2009.

wifiThe new attack builds on 2008 research from Darmstadt University of Technology graduate sstudents Martin Beck and Erik Tews who proved that WPA Temporal Key Integrity Protocol (TKIP) could be attacked. The Beck-Tews attack only worked on short packets in a WPA implementations that supported 802.11 quality of service (QOS) features and took between 12 and 15 minutes to work.

The new threat utilizes a “man in the middle” (MITM) attacks on WPA TKIP systems. The MITM attack  uses the the “chopchop” attack on a short packet (like ARP broadcasts), deciphers its 64-bit Message Integrity Code (MIC), and can then craft whatever packet it wants. The new packet is coded with the proper checksums and passed along to the access point, which should accept it as genuine. Dragos Ruiu, organizer of the PacSec security conference where the first WPA hack was demonstrated told IDGNews, “They took this stuff which was fairly theoretical and they’ve made it much more practical.”

Both attacks work only on WPA systems that use the  TKIP  algorithm.   The new attack does not work on newer WPA2 devices or on WPA systems that use the stronger Advanced Encryption Standard (AES) algorithm. Kelly Davis-Felner, marketing director with the Wi-Fi Alliance, said that people should now use WPA2. She told IDGNews,  WPA with TKIP “was developed as kind of an interim encryption method as Wi-Fi security was evolving several years ago.”

Enterprise Wi-Fi networks typically include security software that would detect the type of man-in-the-middle attack described by the Japanese researchers, Robert Graham, CEO of Errata Security t0ld ars technica. He continues, the development of the first really practical attack against WPA should give people a reason to dump WPA with TKIP, he said. “It’s not as bad as WEP, but it’s also certainly bad.”

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This is only an issue of the WLAN is secured at all.  Motorola published a report in April 2009  that says 64% of companies are neglecting WLAN security. The report claims that only 47% of companies are using Wired Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA) encryption on their wireless networks.

These attacks highlight the weaknesses of TKIP-based WLAN encryption. WPA TKIP was developed to fix the worst of the security holes in the first Wi-Fi encryption protocol, WEP. Wi-Fi-certified products have had to support WPA2 since March 2006 . Users should move to AES-CCMP which requires WPA2 Personal for home and small office networks or WPA2 Enterprise for larger networks. Using AES-CCMP may requires that some network equipment installed before 2003 be reviewed as AES supports key lengths up to 256 bits, which may not be compatible with older hardware. Any remaining equipment of this vintage may need to be  be upgraded to newer Wi-Fi adapters, switched to Ethernet only, or retired. WPA2 has not shown any vulnerabilities to date. There is no real good reason to try to secure your WLAN with WPA-TKIP anymore.

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