Close Capacitive Coupling Communication

Principles and applications

Ecma/TC47/2010/083(Rev. 1 – 8 December 2010

Rev.1.1

CCCC Principle

CCCC (Close Capacitive Coupling Communication) uses the capacitance between conductors or dielectrics when they are brought close to each other.

Through this capacitance, a closed circuit is created between transmitter and receiver.

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CCCC Principle

In actual use, each device functions as both transmitter and receiver.

CCCC facilitates unprecedented services by allowing communication not only directly between devices but also via conductive or dielectric materials.

Typically, communication range is from contiguous to 10 cm. Depending on the application, greater distances are possible.

Transmission speed is from several Mbps to tens of Mbps.

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CCCC Principle

• CCCC devices exchange data with one another by segmenting data into fixed-length frames and alternating the direction of communication.

• Constant communication speed makes CCCC ideal for applications requiring precise time management, while fixed frame length makes complicated handshake processing unnecessary.

• Fixed frame interval signal processing enables dynamic control of communication characteristics.

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Application- Gate System

• passing through a gate with a CCCC device in a pocket completes the transaction.

• Handicapped enjoy unfettered access.

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Application- Keyless Entry

• Just by touching the door handle, the CCCC device holder authenticates and unlocks the door.

• Safe: only the device holder can unlock the door.

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Application- Door Lock

• CCCC device holder opens the door by touching the doorknob or just approaching the door.

• Door access is easy even for those with reduced mobility, with both hands full, using a wheelchair, pushing a stroller, etc.

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Application- ATM

• By authenticating the CCCC device user via the ATM touchscreen, no need to remove or present a card.

• “Shoulder surfing” and forgetting of cards can be prevented.

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Application- Guide System

• CCCC device holder can hear gallery or museum audio guides merely by approaching each work.

• Communication area can be finely controlled by electrode geometry.

• By combining with Bluetooth wireless technology, existing mobile phones can be leveraged for audio playback.

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Application- Health, Medical

• Employing CCCC for transmission of sensor data

• CCCC facilitates secure, wireless transmission, reducing patient discomfort and mobility constraint issues.

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Application- Data Transfer

• Data communication between devices equipped with CCCC.

• Data from digital cameras, portable audio players, etc. can be retrieved without data cards or cables.

• CCC devices placed on a surface with conductive or dielectric properties can communicate with each other.

• Even rich media content can be transferred at high speeds.

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Conclusion

• CCCC, the world’s next-generation communications technology, can:

• Enrich our everyday lives.

• Facilitate services based on natural user behavior by communications both between devices and via intermediaries.

• Provide a wide range of applications to a wide base of users.

• Facilitate provision of multi-channel communication in small areas.

• Handle rich media with high-speed (tens of Mbps) communication.

• Reduce cost through reduced power consumption using simple communications circuitry.

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www.ecma-international.org