Gen 2

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Gen 2

(1) (GENeration 2) The second version of a product.

(2) The second generation air interface for communication between an RFID reader and tag, administered by GS1 EPCglobal ( It deals with the modulation scheme, packet structure, command language and methods for dealing with collision.

Ratified in 2005, Gen 2 was a major enhancement that standardized on a single data link protocol and included support for worldwide spectrum regulations. It added read/write and tag disable functions, interoperability between devices and the ability for readers to work in close proximity to each other. See RFID and EPC.

Tags were given class numbers before Gen 2 was introduced and before the term Gen 1 was coined to refer to the earlier tags and protocols. Although Gen 1 tags are expected to fade into history, there were numerous articles written that mention them. Following is an approximate summary.
        TagGen 1   Type  Bits  Features

 Class 0  P   64-96  Read only, Locked*
                      security tag

 Class 0+ P   64-96  R/W and WORM

 Class 1  P   64-96

 Gen 2 (All classes can be locked) 

 Class 1  P   96-496  Commonly used

 Class 2  P   96-496  Authentication

 Class 3  SP  96-496  Integrated sensing

 Class 4  A   96-496  Ad hoc networking

 P=passive;  SP=semi-passive;  A=active
 RO=read only;  R/W=rewritable
 WORM=write once read many
References in periodicals archive ?
Most system host motherboards do not support a Gen 2 PHY, and a separate card is needed to upgrade the system.
In summary, if you want to fully utilize your SATA Gen 2 host port, then a port multiplier or another similar device can provide expanded storage capacity and enhanced performance.
According to Tawnya Clark, VP, Sales and Marketing at RSI, "The industry is demanding lower cost finished Gen 2 tags, and we're responding.
The increases in performance delivered by RSI ID's Super Gen 2 labels can be measured by the increased range from tag to reader.
We want to ensure that adopters of RFID achieve a seamless migration from the previous infrastructure while capitalizing on the global interoperability and increased performance that Gen 2 offers," said Christophe Duverne, Vice President, Marketing and Sales, Identification, Philips Semiconductors.
Unique to the industry, RSI is the first company to offer such aggressive pricing on finished and fully tested Gen 2 RFID labels.
Gen 2 ready capabilities - supports Gen 2 features such as the select command and access to extended data as well as the management of tag functionality such as memory locking, sessions management, password handling and tag killing.
RSI has leveraged its assembly line machinery and a new patented process to integrate Gen 2 silicon chips into EPC compliant labels.
Ensuring interoperability between the major IC players will help to bring the EPC Gen 2 standard into the marketplace as early as possible, allowing the global business community to benefit from deploying RFID across multinational infrastructures.
The companies also plan to update METRO's Future Store supply chain with Gen 2 capabilities to test the technology under real-life conditions.