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Sony announces "Transferjet" wireless data transfer

By dpreview staff on Jan 7, 2008 at 17:50 GMT

CES 2008: Sony has unveiled its Close Proximity Wireless Transfer Technology system: "TransferJet". Essentially, this is a data transfer system which relies on close proximity - 3cm maximum - and will deliver up to 560 Mbps when two compliant devices are brought together. Aside from the obvious benefits of a standardized, no-contact means of communication between AV devices the new technology promises minimal electromagnetic interference due to the low intensity of the radio waves employed. Click through for Sony's press release.

Press Release:

Sony Develops New Close Proximity Wireless Transfer Technology "TransferJet"

Enables large data quantities to be sent at speeds of 560Mbps with just a touch

Tokyo, January 7, 2008 - Sony today announced "TransferJet", a new Close Proximity Wireless Transfer Technology enabling the high speed transfer of large data files (photos, HD images, etc.) between electronic devices such as mobile phones, digital cameras, digital video cameras, computers and TVs. Using this technology, data can be sent at speeds of 560Mbps. Sony will present reference exhibits of this newly developed technology at CES International, to be held in Las Vegas from January 7th.
TransferJet is an extremely simple wireless technology which eliminates the need for complex setup and operation. For example, just touching a TV with a digital camera enables photos to be instantaneously displayed on the TV screen. Alternatively, downloaded music content can be easily enjoyed by touching a mobile phone to a portable audio player. TransferJet can be used as a Universal Interface among a wide variety of consumer electronics devices.

Sony will actively promote the use of TransferJet across the consumer electronics industry and seek to enhance the enjoyment of mobile device-based content through the introduction of various products and services based on this technology.

Main Features of TransferJet

Simple interface and intuitive operation: "Touch & Get"
Just touch two electronic products together and files are transferred automatically. TransferJet eliminates the complex setup procedures required by existing wireless systems, and no access point is necessary. Furthermore, users are also able to register their electronic products to enable TransferJet to recognize specific products. For example, by registering only the devices within their household, users can prevent external data leakage. Operation is also very intuitive, and as there is no host/target relationship, data transfer can take place between mobile phones and PCs for example, as well as between mobile devices.

Realizing Stable High Speed Data Transmission
TransferJet's physical layer transmission rate is 560Mbps, and even allowing for error corrections and protocol overheads, the effective physical layer transmission rate is 375Mbps. TransferJet is also capable of selecting the appropriate data transmission rate according to the wireless environment. Even if the conditions for transmission deteriorate, it will maintain the highest possible wireless connectivity by automatically lowering the data transmission rate.

As TransferJet is a close proximity wireless system which radiates very low-intensity radio waves, it causes almost no interference to other wireless systems, and there is no impact to performance even if multiple users simultaneously multiple TransferJet system. Moreover, users of electronic products incorporating TransferJet technology are able to transfer data among each other's products regardless of whether they are indoors or outdoors and irrespective of their geographic location.

Development of New "TransferJet Coupler"
Sony's newly developed "TransferJet Coupler" is based on electric induction field coupling to deliver superior propagation performance compared to conventional radiation field based antennas. It maintains high transmission gain and efficient coupling in near-field proximity, while providing sharp attenuation over longer distances to avoid interference with other wireless systems.

Furthermore, as there is no antenna polarization it is possible to transmit data without any performance loss, regardless of the contact angle of the electronic devices.

TransferJet specifications

Central Frequency 4.48 GHz
Transmission Power -70dBm/MHz or less (average power)
Corresponds with low intensity radio wave regulations in Japan, and with local regulations in respective overseas regions.
Transmission Rate 560Mbps (Max.) / effective 375Mbps
It is capable of selecting the appropriate transmission rate depending on the wireless environment.
Communication Distance Within 3cm

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