Simple NDEF Exchange Protocol Enables Common Data Format for Peer-to-Peer and Reader/Writer Modes
WAKEFIELD, Mass., USA - Sept. 29, 2011 - The NFC Forum, a non-profit industry association that advances the use of Near Field Communication (NFC) technology, has released its 16th specification, the Simple NDEF Exchange Protocol (SNEP). SNEP is an application-level protocol suitable for sending or receiving messages between two NFC-enabled devices. The new SNEP specification is available to the public for download at no charge.
The SNEP specification was published following an approval ballot of NFC Forum voting members. Information on all NFC Forum specifications can be found at http://www.nfc-forum.org/specs/.
The extension of the NFC Data Exchange Format (NDEF) to peer-to-peer use in SNEP is a significant advance. Previously, NDEF was applicable only to NFC tags in reader/writer mode. Now, SNEP enables the use of the openly standardized NDEF in peer-to-peer mode, making seamless interchange of data a reality (see sample use cases below). Application developers no longer need to concern themselves with how their NDEF data gets transferred between NFC-enabled devices. This capability is similar to the way that NFC Forum Tag Type specifications encapsulate the differences between communication layers. By providing this capability, the SNEP specification makes the difference between reader-writer and peer-to-peer operation modes disappear - a major step towards global interoperability of NFC applications.
SNEP Use Cases
Here are two examples of potential applications for NFC technology developed with the new SNEP specification:
Simplified transfer of contact information - one person's phone can be configured to automatically send business card information when an NFC peer-to-peer connection is established. The recipient doesn't have to do anything other than to accept the business card and allow it to be entered into his phone book.
Collecting movie posters for later use - a consumer can retrieve and store movie posters with NFC tags onto an NFC-enabled phone while just passing by. Back home, the consumer can display the movie information on a flat-screen TV and navigate to the films' web pages, simply by tapping the phone to an NFC-enabled TV remote control.
"By extending NDEF to peer-to-peer communications, our SNEP specification adds to the usability of NFC technology and broadens its possibilities, enabling enterprises to offer new, creative, and appealing applications to businesses and consumers," said Koichi Tagawa, chairman of the NFC Forum. "Specification development is an important part of the NFC Forum's mission; the extensive suite of NFC Forum specifications is testimony to the hard work of our members, whose activity yields benefits for the entire NFC ecosystem. We are grateful to everyone who participated in the effort to deliver SNEP."
SNEP Technical Information
SNEP allows an application on an NFC-enabled device to exchange NFC Data Exchange Format (NDEF) messages with another NFC-enabled device when operating in NFC Forum peer-to-peer mode. The protocol makes use of the NFC Logical Link Control Protocol (LLCP) connection-oriented transport mode to provide a reliable data exchange.
SNEP is a request/response protocol. A SNEP client application sends a request to a SNEP server application to either retrieve data from the server with a GET method or push data to the server using the PUT method. The protocol handles segmentation and reassembly of large messages as well as early cancellation of transfers that would exhaust receiving capabilities.
Beyond the protocol definition, the SNEP specification defines a default server that is available as a well-known service on an NFC-enabled device. This default server functions as a simple Inbox that applies locally defined processing to received NDEF messages. An NFC-enabled personal computer could, for example, open the web page that is provided in a Smart Poster NDEF message sent from an NFC-enabled mobile phone.
About Near Field Communication Technology
NFC technology makes life easier and more convenient for consumers around the world by making it simpler to make transactions, exchange digital content, and connect electronic devices with a touch.
A standards-based connectivity technology, NFC harmonizes today's diverse contactless technologies, enabling current and future solutions in areas such as access control, consumer electronics, healthcare, information collection and exchange, loyalty and coupons, payments, and transport.
NFC technology is supported by the world's leading communication device manufacturers, semiconductor producers, network operators, IT and services companies, and financial services organizations. NFC is compatible with hundreds of millions of contactless cards and readers already deployed worldwide.
About the NFC Forum
The NFC Forum was launched as a non-profit industry association in 2004 by leading mobile communications, semiconductor, and consumer electronics companies. The Forum's mission is to advance the use of Near Field Communication technology by developing specifications, ensuring interoperability among devices and services, and educating the market about NFC technology. The Forum's 160 global member companies currently are developing specifications for a modular NFC device architecture, and protocols for interoperable data exchange and device-independent service delivery, device discovery, and device capability.
The NFC Forum's Sponsor members, which hold seats on the Board of Directors, include leading players in key industries around the world. The Sponsor members are: Broadcom Corporation, INSIDE Secure, MasterCard Worldwide, Microsoft Corp., NEC, Nokia, NTT DOCOMO, Inc., NXP Semiconductors, Renesas Electronics Corporation, Samsung, Sony Corporation, STMicroelectronics, and Visa Inc.