Battery Assisted RFID Command Set and Interference Control

A method for generating an RFID activation command that is transmitted from an RFID reader and processed in an RFID tag, the command structure comprising:

• generating a session/inventory flag identification code that identifies a session that the RFID reader may use after a set of RFID tags has been activated;
• generating a session/inventory care/don't care code that indicates if the RFID tag, within the set of RFID tags, is to check a hibernate mode state of a session/inventory flag as a parameter upon which to base activation of the RFID tag;
• generating a control code that specifies if tag session locking is to be in effect after activation of the RFID tag;
• inserting the session/inventory flag identification code, the session/inventory care/don't care code, and the control code within a plurality of fields in the RFID activation command;
• and
• wherein the RFID reader specifies a value that places the RFID tag in a tag session locked mode to prevent a response to a normal mode command with a differing session code than one indicated in the activation command structure.

A method of generating an RFID activation command that is transmitted from an RFID reader and processed in an RFID tag, the method comprising:

• generating an air interface class identification code that identifies a subset of possible air interface classes associated with the RFID tag that are to respond to the reader activation command;
• and
• inserting the air interface class identification code within the RFID activation command;
• and
• transmitting the RFID activation command to the RFID tag.

A method for bringing a set of RFID tags into an interrogation/query round, the method comprising:

• generating air interface class identification code that identifies a class of at least one RFID tag, within the set of RFID tags, that are to participate in the interrogation round;
• inserting the air interface class identification code within an RFID interrogation command;
• and
• transmitting the RFID interrogation command to the set of RFID tags.

A method for bringing a set of RFID tags into an interrogation/query round, the method comprising:

• generating a sensor type identification code that identifies at least one sensor type required for each RFID tag, within the set of RFID tags, to participate in the interrogation round,
• inserting the sensor type identification code within an RFID interrogation command;
• and
• transmitting the RFID interrogation command to the set of RFID tags.