Time synchronization in wireless networks

A method comprising:

• transmitting, to a data controller:
• a first configuration message from a network manager, the first configuration message including at least a wireless node identification, a wake duration, and a sleep duration;
• and
• an association request from a wireless node;
• authenticating, by the data controller, the wireless node based on the wireless node identification and the association request;
• transmitting a second configuration message from the data controller to the wireless node, the second configuration message including at least the wake duration and the sleep duration;
• configuring a duty cycle of a timing circuit of the wireless node based on at least the wake duration and the sleep duration, wherein the wireless node is in a low-power state during the sleep duration, wherein the wireless node is in an active state during the wake duration;
• and
• transmitting an acknowledgement message from the wireless node to the data controller;
• the method further comprising:
• generating, by the network manager, a polling request schedule, the polling request schedule based on at least a receipt time at which sensor data is received by the data controller, the sleep duration of the wireless node, and a tolerance of the timing circuit;
• transmitting a plurality of polling requests from the data controller to the wireless node, the plurality of polling requests transmitted according to the polling request schedule;
• receiving, to the wireless node, a polling request of the plurality of polling requests during the active state of the wireless node;
• and
• transmitting, to the data controller from the wireless node, the sensor data generated by a sensor of the wireless node.