TransferJet
Encyclopedia
TransferJet is a new type of close proximity wireless transfer technology initially demonstrated publicly in early 2008. By touching (or bringing very close together) two electronic devices, TransferJet allows high speed exchange of data. The concept of TransferJet consists of a touch-activated interface which can be applied for applications requiring high-speed data transfer between two devices in a peer-to-peer mode without the need for external physical connectors.
TransferJet's maximum physical layer transmission rate is 560 Mbit/s. After allowing for error correction and other protocol overhead, the effective maximum throughput is 375 Mbit/s. TransferJet will adjust the data rate downward according to the wireless environment, thereby maintaining a robust link even when the surrounding wireless condition fluctuates.
TransferJet has the capability of identifying the unique MAC
addresses of individual devices, enabling users to choose which devices can establish a connection. By allowing only devices inside the household, for example, one can prevent data theft from strangers while riding a crowded train. If, on the other hand, one wishes to connect the device with any other device at a party, this can be done by simply disabling the filtering function.
TransferJet uses the same frequency spectrum as UWB
, but occupies only a section of this band available as a common worldwide channel. Since the RF power is kept under -70 dBm/MHz, it can operate in the same manner as that of UWB devices equipped with DAA
functionality. In addition, this low power level also ensures that there will be no interference to other wireless systems, including other TransferJet systems, operating nearby.
By reducing the RF power and spatial reach down to a few centimeters (about an inch or less), a TransferJet connection in its most basic mode does not require any initial setup procedure by the user for either device, and the action of spontaneously touching one device with another will automatically trigger the data transfer. More complex usage scenarios will require various means to select the specific data to send as well as the location to store (or method to process) the received data.
TransferJet utilizes a newly developed TransferJet Coupler based on the principle of electric induction field as opposed to radiation field for conventional antennas. The functional elements of a generic TransferJet Coupler consist of a coupling electrode or plate, a resonant stub and ground. Compared to conventional radiating antennas, the TransferJet Coupler achieves higher transmission gain and more efficient coupling in the near-field while providing sharp attenuation at longer distances. Because the Coupler generates longitudinal electric fields, there is no polarization and the devices can be aligned at any angle.
TransferJet Specifications
Although sometimes confused with Near Field Communication
, TransferJet depends on an entirely different technology and is also targeted for different usage scenarios focusing on high-speed data transfer. Thus these two systems will not interfere with each other and can even co-exist in the same location, as already implemented in certain products.
The TransferJet Consortium was established in July 2008 to advance and promote the TransferJet Format, by developing the technical specifications and compliance testing procedures as well as creating a market for TransferJet-compliant, interoperable products. As of September 2011, the Consortium is led by sixteen Promoter companies, consisting of: Canon, Casio
, Hitachi Ltd, JVC
-Kenwood
, KDDI
, Nikon
, NTT docomo
, Olympus
, Panasonic
, Pioneer
, Samsung
, Seiko Epson
, SoftBank Mobile, Sony
, Sony Ericsson
and Toshiba
. The Consortium currently also has thirty seven Adopter companies, for a total of fifty three member companies.
Commercial products have been introduced since January 2010 and the initial product categories include digital cameras, laptop PCs, USB cradle accessories and new office/business equipment.
Compliance testing equipment is provided by Agilent technologies and certification services are offered by Allion Test Labs and XXCAL Japan.
(Note: TransferJet is spelled with a capital "J")
TransferJet's maximum physical layer transmission rate is 560 Mbit/s. After allowing for error correction and other protocol overhead, the effective maximum throughput is 375 Mbit/s. TransferJet will adjust the data rate downward according to the wireless environment, thereby maintaining a robust link even when the surrounding wireless condition fluctuates.
TransferJet has the capability of identifying the unique MAC
MAC address
A Media Access Control address is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are used for numerous network technologies and most IEEE 802 network technologies, including Ethernet...
addresses of individual devices, enabling users to choose which devices can establish a connection. By allowing only devices inside the household, for example, one can prevent data theft from strangers while riding a crowded train. If, on the other hand, one wishes to connect the device with any other device at a party, this can be done by simply disabling the filtering function.
TransferJet uses the same frequency spectrum as UWB
UWB
UWB may refer to:* Ultra-wideband, a very wide band radio technologyIn education:* University of West Bohemia, Czech Republic* University of Washington, Bothell, United States...
, but occupies only a section of this band available as a common worldwide channel. Since the RF power is kept under -70 dBm/MHz, it can operate in the same manner as that of UWB devices equipped with DAA
Detect and Avoid
Detect and avoid is a set of technologies designed to avoid interference between a given emitter and the wireless environment. Its need was generated by the Ultra-wideband standard that uses a fairly large spectrum to emit its pulses....
functionality. In addition, this low power level also ensures that there will be no interference to other wireless systems, including other TransferJet systems, operating nearby.
By reducing the RF power and spatial reach down to a few centimeters (about an inch or less), a TransferJet connection in its most basic mode does not require any initial setup procedure by the user for either device, and the action of spontaneously touching one device with another will automatically trigger the data transfer. More complex usage scenarios will require various means to select the specific data to send as well as the location to store (or method to process) the received data.
TransferJet utilizes a newly developed TransferJet Coupler based on the principle of electric induction field as opposed to radiation field for conventional antennas. The functional elements of a generic TransferJet Coupler consist of a coupling electrode or plate, a resonant stub and ground. Compared to conventional radiating antennas, the TransferJet Coupler achieves higher transmission gain and more efficient coupling in the near-field while providing sharp attenuation at longer distances. Because the Coupler generates longitudinal electric fields, there is no polarization and the devices can be aligned at any angle.
TransferJet Specifications
| Center Frequency | 4.48 GHz |
| Bandwidth | 560 MHz |
| Transmission Power | At or below -70 dBm/MHz (average) Corresponds to low-intensity radio wave regulation in Japan and Taiwan, and with local regulations in other countries and regions. |
| Transmission Rate | 560 Mbit/s (max) / 375 Mbit/s (effective throughput) System can adjust the transmission rate depending on the wireless environment. |
| Connection Distance | A few cm (nominal) |
| Connection Topology | 1-to-1, Point-to-Point |
| Antenna Element | Electric induction field coupler |
Although sometimes confused with Near Field Communication
Near Field Communication
Near field communication, or NFC, allows for simplified transactions, data exchange, and wireless connections between two devices in proximity to each other, usually by no more than a few centimeters. It is expected to become a widely used system for making payments by smartphone in the United States...
, TransferJet depends on an entirely different technology and is also targeted for different usage scenarios focusing on high-speed data transfer. Thus these two systems will not interfere with each other and can even co-exist in the same location, as already implemented in certain products.
The TransferJet Consortium was established in July 2008 to advance and promote the TransferJet Format, by developing the technical specifications and compliance testing procedures as well as creating a market for TransferJet-compliant, interoperable products. As of September 2011, the Consortium is led by sixteen Promoter companies, consisting of: Canon, Casio
Casio
is a multinational electronic devices manufacturing company founded in 1946, with its headquarters in Shibuya, Tokyo, Japan. Casio is best known for its electronic products, such as calculators, audio equipment, PDAs, cameras, musical instruments, and watches...
, Hitachi Ltd, JVC
JVC
, usually referred to as JVC, is a Japanese international consumer and professional electronics corporation based in Yokohama, Japan which was founded in 1927...
-Kenwood
Kenwood
- Places :England* Kenwood , a part of Hampstead Heath, London, the location of** Kenwood House* Kenwood, in the parish of Kenton, Devon* Kenwood, St. George's Hill, John Lennon's home in Weybridge, SurreyUnited States* Kenwood, California...
, KDDI
KDDI
is a Japanese telecommunications operator formed in October 2000 through the merger of DDI Corp., KDD Corp., and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi, Chiyoda, Tokyo....
, Nikon
Nikon
, also known as just Nikon, is a multinational corporation headquartered in Tokyo, Japan, specializing in optics and imaging. Its products include cameras, binoculars, microscopes, measurement instruments, and the steppers used in the photolithography steps of semiconductor fabrication, of which...
, NTT docomo
NTT DoCoMo
is the predominant mobile phone operator in Japan. The name is officially an abbreviation of the phrase, "do communications over the mobile network", and is also from a compound word dokomo, meaning "everywhere" in Japanese. Docomo provides phone, video phone , i-mode , and mail services...
, Olympus
Olympus Corporation
is a Japan-based manufacturer of optics and reprography products. Olympus was established on 12 October 1919, initially specializing in microscope and thermometer businesses. Its global headquarters are in Shinjuku, Tokyo, Japan, while its USA operations are based in Center Valley, Pennsylvania,...
, Panasonic
Panasonic
Panasonic is an international brand name for Japanese electric products manufacturer Panasonic Corporation, which was formerly known as Matsushita Electric Industrial Co., Ltd...
, Pioneer
Pioneer Corporation
is a multinational corporation that specializes in digital entertainment products, based in Kawasaki, Kanagawa, Japan. The company was founded in 1938 in Tokyo as a radio and speaker repair shop...
, Samsung
Samsung
The Samsung Group is a South Korean multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea...
, Seiko Epson
Seiko Epson
, commonly known as Epson, is a Japanese technology company and one of the world's largest manufacturers of computer printers, information and imaging related equipment...
, SoftBank Mobile, Sony
Sony
, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....
, Sony Ericsson
Sony Ericsson
Sony Ericsson Mobile Communications AB is a joint venture established on October 1, 2001 by the Japanese consumer electronics company Sony Corporation and the Swedish telecommunications company Ericsson to manufacture mobile phones....
and Toshiba
Toshiba
is a multinational electronics and electrical equipment corporation headquartered in Tokyo, Japan. It is a diversified manufacturer and marketer of electrical products, spanning information & communications equipment and systems, Internet-based solutions and services, electronic components and...
. The Consortium currently also has thirty seven Adopter companies, for a total of fifty three member companies.
Commercial products have been introduced since January 2010 and the initial product categories include digital cameras, laptop PCs, USB cradle accessories and new office/business equipment.
Compliance testing equipment is provided by Agilent technologies and certification services are offered by Allion Test Labs and XXCAL Japan.
(Note: TransferJet is spelled with a capital "J")
External links
- TransferJet Consortium Official Website
- TransferJet Consortium Offers New Adopter Membership
- TransferJet Consortium Launch Press Release
- RF Module Compatible with TransferJet
- Memory Card module
- Allion qualified as TransferJet Certification Lab
- XXCAL qualified as TransferJet Certification Lab - in Japanese
- Agilent Test Measurement System - in Japanese
- Toshiba Shows Its First TransferJet Prototypes
- TransferJet technology equipped au mobile phone
- Sony Ericsson Now Support Skype, JAVA, Flash and TransferJet
- TransferJet Consortium SNS Website