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Transaction scheduling system for a wireless data communications network

  • US 9,971,916 B1
  • Filed: 12/27/2017
  • Issued: 05/15/2018
  • Est. Priority Date: 04/01/2015
  • Status: Active Grant
First Claim
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1. In a data communications network comprising a tag and a master, a method for coordinating data communications between the tag and the master, the method comprising:

  • defining on the master a time division block, the time division block comprising a length of time subdivided into a configuration window and a transaction window;

    during the configuration window,receiving on the master a configuration request packet broadcasted by the tag;

    in response to receiving the configuration request, establishing on the master a reserved time slot within the transaction window, the reserved time slot comprising a slice of time during which the master will detect and accept a set of transaction packets broadcasted by the tag, andbroadcasting a configuration response packet from the master, the configuration response packet comprising a time delay for the tag, the time delay comprising an amount of time that the tag should wait before attempting to broadcast the set of transaction packets to the master, wherein the time delay is calculated by the master to cause the set of transaction packets broadcasted by the tag to be broadcasted during the reserved time slot in the transaction window;

    during the reserved time slot of the transaction window, detecting and accepting on the master the set of transaction packets broadcasted by the tag;

    broadcasting from the master a network identifier (ID) for the master, the network ID uniquely identifying the data communications network associated with the master;

    broadcasting a two-way ranging request packet from the tag during the first reserved time slot of the transaction window;

    accepting the two-way ranging request packet on the master during the first reserved time slot of the transaction window;

    broadcasting a two-way ranging response packet from the master during the first reserved time slot of the transaction window;

    receiving the two-way ranging response packet on the tag during the first reserved time slot of the transaction window; and

    broadcasting a two-way ranging acknowledgment packet from the tag during the first reserved time slot of the transaction window.

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