Patent ID: 9000891
Filing Date: 2015-04-07
Classification: G06K,H04Q,H04W

Abstract:
1. A method of adjusting a query command slot-count parameter, the method comprising: setting, via a processor, an initial value for the query command slot-count parameter for a first inventory round; issuing, via the processor, a query command comprising the initial value for the query command slot-count parameter to a plurality of radio frequency identification tags; monitoring, via the processor, replies from the plurality of radio frequency identification tags for identifying the plurality of radio frequency identification tags; and adjusting, via the processor, the initial value of the query command slot-count parameter for use in a second inventory round by a first amount if no reply is received for the query command that is issued, wherein the first amount is 0.1, and by a second amount different from the first amount if a tag collision reply is received for the query command that is issued, wherein the second amount is a lesser of 1.0 and a value of a formula (0.1)*(Ave_T coll/Ave_T idle), wherein Ave_Tcoll, is an average duration of a collided reply from the plurality of radio frequency identification tags, and wherein Ave_T idle is an average duration of no reply from the plurality of radio frequency identification tags, wherein the Ave_T coll is proximate to 1456 microseconds.