Reliable High-Speed Communications
With a physical layer transmission rate of 560 Mbps, the TransferJet Coupler can achieve an effective maximum data throughput of 375 Mbps, even allowing for error correction and other protocol overhead. The system is also capable of selecting the optimal transfer rate according to the wireless conditions. When conditions deteriorate, the system can maintain the quality and robustness of the connection by automatically reducing the transmission speed.
Solving Problems Inherent to Close-Proximity Wireless Communication
The TransferJet Coupler can recognize its unique MAC addresses* and other device-specific information. This means that users can control which devices they wish to connect with. By limiting access only to the devices in their homes, users can prevent strangers, such as people in crowded trains, from accessing their data without permission. This feature can also be switched off to allow communications with any device, such as when connecting with other people′s devices while on vacation or at parties.
*MAC Address: A unique identification number assigned to identify each physical device.
Ultra-Low-Power Wireless Communications Technology
Sony succeeded in achieving high transmission rates while minimizing transmission power. In fact, the TransferJet system uses only 1/700 as much power as ultra-wide-band (UWB) technology (which has a reputation for low power consumption). It complies with the Japanese standard for low-intensity wireless stations and can be used indoors, outdoors and in vehicles throughout Japan. Also, because TransferJet is an ultra-low-power wireless transfer system designed to operate at close proximities, there is almost no interference with other wireless systems. This means the TransferJet system will not cause problems with wireless LAN or Bluetooth since these operate on different frequencies.
| Center frequency | 4.48 GHz |
|---|---|
| Transmission power | -70 dBm/MHz or lower (average power) Complies with low-intensity wireless station standard in Japan, and with local radio wave regulations in other countries. |
| Transmission rate | 560 Mbps (max.)/ 375Mbps (effective throughput) . Capable of selecting optimal transmission rate |
| Transmission distance | Approximately a few cm (nominal) |
Future of the Technology
TransferJet wireless technology can be incorporated in a wide range of devices. Sony is promoting the cross-industry adoption of the technology and plans to develop specifications to meet the needs of content providers by creating products and services based on TransferJet, primarily using mobile and handheld devices.
