A Japanese university team that has developed an airship equipped with
a wireless Internet access point says a recent trial of the technology
was a success.
The team, from Chubu University in central Japan, provided wireless LAN
access from its Solan-1 airship to visitors at the recently concluded
Aichi World Expo in Japan and proved the technology works, said Osamu
Saiki, a Chubu University student working on the project.
The Solan-1 craft was generally tethered at a height of 30 meters above
the ground and provided coverage over an area of radius 500 meters.
This could be extended to around a kilometer from the airship in all
directions if it was raised to 100 meters above ground; but strong
winds often meant it didn’t reach this height.
A second craft, the Solan-2, was also used at the Aichi World Expo and is on show this week at the World PC Expo show in Tokyo.
The Solan-2, which is tethered inside an event hall at the show, is
equipped with an IEEE 802.11b/g wireless LAN access point and visitors
to the exhibition can enjoy a free Internet connection through the
on-board base station. A second wireless link provides a connection
between the airship and the Internet.
The airship is solar-powered and thus also includes solar panels and
there are also a pair of remote controlled cameras on the bottom of the
craft that can send images via the wireless LAN connection.
Going forward, the university team plans to refine the technology.
Problems encountered because of wind are one of the areas that the team
will now look into, said Saiki. He also said they will work on ways of
keeping the craft powered on days when it’s raining or cloudy and
sunlight is much lower than normal.
Airships have been considered for some time as a way to provide
wireless telecommunications links over a wide area, either permanently
or temporarily during events or disasters.
The Japanese government has been mulling a system that would use
airships to provide cellular coverage to some of the country’s
mountainous areas which are currently out of the range of ground-based
cellular towers. In the U.S. Sanswire Networks LLC is planning a
network of airships flying at altitudes of around 9 kilometers that
would provide nationwide coverage.
By Martyn Williams – IDG News Service (Tokyo Bureau)