Near Fileld Communication （NFC） is a new automatic identification technique and wireless communica- tion technique being developed in recent years. It finishes the function of non-contact

full-duplex com- munication in the wireless radio frequency manner between a initiator and a target to exchange data and identify a target .This paper introduces NFC based on ECMA-340 standard

including its background

concept

attribute and its technological details. It also narrates in detail the anti-collision algorithms and analyzes its performance. Several key techniques used in ECMA-340 are discussed in this paper too.