Sony Develops New Close Proximity Wireless Transfer Technology

( 1 May 2008 )

Sony has developed "TransferJet", a new close proximity wireless transfer technology enabling the high-speed transfer of large data files, including photos and HD images, between electronic devices such as mobile phones, digital cameras, digital video cameras, computers and TVs. TransferJet, which features data transfer speeds up to 560Mbps, is an extremely simple wireless technology that eliminates the need for complex setup and operation. For instance, 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.

Users are also able to register their electronic products to enable TransferJet to recognize specific products. By registering only the devices within their household, users can prevent external data leakage. Operation is also very intuitive; 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.

TransferJet's physical layer transmission rate can go as high as 560Mbps. Allowing for error corrections and protocol overheads, the effective physical layer transmission rate can still go to 375Mbps. The technology is also capable of selecting the appropriate data transmission rate according to the wireless environment; maintaining the highest possible wireless connectivity despite deteriorating transmission conditions.

Meanwhile, TransferJet radiates very low-intensity radio waves, causing negligible interference to other wireless systems, as well as despite simultaneous operation of multiple TransferJet system. Sony has developed a "TransferJet Coupler", which 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.