Patent ID: 6212393
Filing Date: 2001-04-03
Classification: H04L

Abstract:
In a dispatch center within a vehicle dispatch system, a method for communication between the dispatch center and a plurality of wireless communication devices comprising:receiving a request for dispatch including an assignment location;generating an assignment message including a first criteria parameter and a location parameter corresponding to the assignment location;sending the assignment message including the first criteria parameter and the location parameter to the plurality of wireless communication devices, wherein each wireless communication device having a current location:receives the assignment message including the first criteria parameter and the location parameter from the dispatch center,compares the location parameter to the current location of the wireless communication device using the first criteria parameter for detecting an affirmative match,transmits a reply to the dispatch center in response to the detection of the affirmative match; andgenerating a second criteria parameter in response to the timeout of a timer, wherein the timer is reset upon receipt of the reply from the wireless communication device; andsending a second assignment message including the second criteria parameter and the location parameter to the plurality of wireless communication devices.