公开(公告)号：DE69530547D1

公开(公告)日：2003-06-05

申请号：DE69530547

申请日：1995-08-11

Applicant: IBM

Inventor： CHAN SHUN SHING ,  CESAR CHRISTIAN LENZ ,  COFINO THOMAS ANTHONY ,  GOLDMAN KENNETH ALAN ,  GREENE SHARON L ,  HEINRICH HARLEY KENT ,  MCAULIFFE KEVIN PATRICK

IPC: G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G06K7/00 ,  G06K17/00 ,  G07C3/00 ,  G07C9/00 ,  H04B1/59 ,  G06K7/10

Abstract: A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroup(s) of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.

公开(公告)号：DE69530547T2

公开(公告)日：2004-02-26

申请号：DE69530547

申请日：1995-08-11

Applicant: IBM

Inventor： CHAN SHUN SHING ,  CESAR CHRISTIAN LENZ ,  COFINO THOMAS ANTHONY ,  GOLDMAN KENNETH ALAN ,  GREENE SHARON L ,  HEINRICH HARLEY KENT ,  MCAULIFFE KEVIN PATRICK

IPC: G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G06K7/00 ,  G06K17/00 ,  G07C3/00 ,  G07C9/00 ,  H04B1/59 ,  G06K7/10

Abstract: A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroup(s) of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.

公开(公告)号：SG34973A1

公开(公告)日：1997-02-01

申请号：SG1995000345

申请日：1995-04-27

Applicant: IBM

Inventor： CESAR CHRISTIAN LENZ ,  GOLDMAN KENNETH ALAN ,  GREENE SHARON L ,  CHAN SHUN ,  COFINO THOMAS ANTHONY

IPC: H04Q7/34