Main TransferJet Features |
| . |
. |
(1)Simple operation: just bring the
devices close together
TransferJet solves the main problems with
current wireless technologies: the complex
settings that are required and the unstable data
transfers. Simply by placing the devices that
need to communicate near to each other, even
someone who has never used a PC can connect
equipment easily and without problem. Also,
since there is no host/target relationship, a
cellular phone can communicate with a PC, or
a pair of cellular phones can communicate.
Furthermore, communicating devices can be
registered in advance. For example, by only
registering your home equipment, you can
prevent data leaking to third parties.
(2)Stable, high-speed transfers
The TransferJet physical transfer rate is up to
560 Mbits/s using the 4.48 GHz band. The
effective rate, which takes error correction
and protocol overhead into account, reaches
375 Mbits/s. This rate can reduce transfer
times even for large files such as audio files or video files. Also, TransferJet includes a function
for selecting an optimal transfer rate for
the actual communication conditions and can,
when communication conditions are poor,
maintain communication by automatically
lowering the transfer rate.
The transmitted power is a level that conforms
to the Japanese regulations on weakfield
transmission and TransferJet has no effect
on other wireless systems. This means that
multiple users can use TransferJet at the same
time and equipment that includes TransferJet
can be used for data communication regardless
of whether the equipment is indoors or outdoors,
regardless of what country it is in, and
regardless of what company manufactured
the equipment.
(3) New type of coupler developed
The transmission principle that TransferJet
uses is not the radiated electromagnetic field
used by existing wireless transmission systems,
but rather is the electric inductive field.
Therefore, Sony had to develop a new type of
coupler in place of the existing wireless antennas.
The frequency band used by this coupler
is the 4.48 GHz band. It transmits data with an
output that meets the Japanese regulations for
weak field wireless output levels. This new
type of coupler has the feature that it acquires high gain at close distances but signal strength
is attenuated rapidly when separated. This
means that this coupler will not receive interference
from other wireless equipment as long
as that equipment is not brought within a few
cm of the coupler.
Furthermore, since the field is not polarized,
communication is possible without loss of
gain simply by bringing the devices close
together without being aware of the angle
between them. |
|
| Envisioned Product
Deployment |
| . |
. |
––If TransferJet were included in a FeliCa
port ...
Authentication and billing would be possible
by just bringing a portable terminal to a FeliCa
port (a reader/writer that supports FeliCa).
For example, when downloading music, the
music content being purchased could be downloaded
at high speed at the same time as
authentication and billing.
–– If all equipment included TransferJet ...
Any pair of equipment units would be able to
transfer music, movies, or image data at high
speed just by bringing them close together.
Problems such as transfers taking too much
time and the inconvenience of connecting and
disconnecting cables would be eliminated.
For example, it would be possible to download
images captured with a digital camera to a
recorder and then they could be uploaded to
portable equipment. File transfers between
digital cameras and data transfer between cellular
phones would be simple.
In addition, we also envision a wide range of
TransferJet product deployments as an interface
between various equipment types.
Sony will encourage the industry to adopt this
technology in the near future as a means for
transferring large amounts of data, and,
through the realization of products and services
that apply TransferJet, will respond to the
needs of the mobile equipment centered content-consuming society.
We are aiming for the wide popularization of
home networks that connect the electronic
equipment in the home, and expect that this
will be made practical in the fiscal year starting
in 2009. |
|
 |
 If you change your thinking,
you can turn limitations into strengths |
|
See
all articles with figures and tables.  |
|
Vol.52 |
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