Wireless Ad Hoc Networks

Aug 30, 2004
Wireless ad hoc networks

Developers will be presenting a self-organizing communications network during the e/home trade fair in Berlin. Users can enjoy wireless Internet access or remotely control utilities in the home without having to deal with complex installations or equipment compatibility.


Anyone who has tried to install an in-home communications network is familiar with the problems involved in making the different systems work together. In most cases this results in an extra big helping of cable spaghetti. If wireless systems are a blessing, being able to ignore the technical complexity of what happens in the background would be bliss. The mobile phone communicates with the PC and the PC connects to the Internet. Researchers at the Fraunhofer Institute for Communications Systems ESK in Munich will be presenting their prototype of a mobile ad hoc network at the e/home trade fair on September 1-3 in Berlin (hall 7.2a, exhibit stand 21). More than just making it easier to operate wireless devices in the home, the network can also be used to control wireless sensors and actuators that operate window blinds, ventilation or heating systems.

“We build mobile ad hoc networks using forwarding nodes,” explains Markus Augel from ESK. It’s less complicated than it sounds. A notebook, mobile phone and a PDA, for example, automatically form a wireless network that organizes itself. “The forwarding nodes – the core of our technology – simultaneously interconnect multiple devices and transfer data from one device to another. As the user moves around the house, his position in relation to the node changes. This can interrupt the connection. To overcome this, we developed a hand-over process for the Bluetooth standard.” This technology automatically passes a deteriorating connection to a forwarding node that provides better quality. As is the case with mobile phones, the user is not aware of this happening. Moreover, the notebook and PDA are not directly connected, but instead communicate via the forwarding nodes using multi-hop communications. The greater the number of forwarding nodes, the wider the WLAN or Bluetooth transmission range. The nodes, small white boxes that require only battery or AC power, work with any Bluetooth or WLAN compatible device.

The ESK prototype provides wireless Internet access from anywhere in the home. Other potential uses include distributing information throughout shopping centers and museums or exchanging electronic business cards – even using different devices. The only requirement is that the device makes itself known to the network. Downloading an MP3 song from your home-office computer to a PDA while you sit in the garden then becomes easy. Or with sensors and actuators and a mobile phone, close the blinds without having to get up out of your favorite chair.

Source: Fraunhofer-Gesellschaft

Explore further: Study: Apple's new iPhones score big in durability

add to favorites email to friend print save as pdf

Related Stories

Ericsson to stop making modems, shed hundreds of jobs

12 hours ago

Swedish telecom equipment company Ericsson said on Thursday that it would stop developing modems, a decision affecting almost 1,600 employees worldwide which is expected to lead to hundreds of job cuts.

Cutting congestion on the data network highway

Sep 12, 2014

Perhaps no other consumer-driven technology has made such incredible advances in such a relatively short space of time as the mobile phone. Today's smartphones are used to stream videos, access social media ...

T-Mobile to sell phones that call, text on Wi-Fi (Update)

Sep 10, 2014

T-Mobile will sell more than 100 smartphone models with a built-in feature that taps into Wi-Fi networks to make phone calls and send texts when customers can't connect to the wireless carrier's cellular network.

Intel says world's smallest 3G modem has been launched

Aug 27, 2014

Analysts say why not. Intel is going after its own comfortable stake in the mobile market, where connectivity for wearables and "Internet of Things" household items will be in high demand. Intel on Tuesday ...

3Qs: Password and cloud security

Sep 08, 2014

The recent news that hackers accessed celebrities' cloud accounts and released their intimate photos online has prompted many to question the security of sensitive data stored on people's own smartphones and in the cloud. ...

Recommended for you

Oculus unveils new prototype VR headset

Sep 20, 2014

Oculus has unveiled a new prototype of its virtual reality headset. However, the VR company still isn't ready to release a consumer edition.

Wireless sensor transmits tumor pressure

Sep 20, 2014

The interstitial pressure inside a tumor is often remarkably high compared to normal tissues and is thought to impede the delivery of chemotherapeutic agents as well as decrease the effectiveness of radiation ...

Tim Cook puts personal touch on iPhone 6 launch

Sep 20, 2014

Apple chief Tim Cook personally kicked off sales of the iPhone 6, joining in "selfies" and shaking hands with customers Friday outside the company's store near his Silicon Valley home.

User comments : 0