Issue link: https://read.uberflip.com/i/1428395
LoRaWAN ® L2 1.0.4 Specification © 2020 LoRa Alliance ® Page 53 of 90 The authors reserve the right to change specifications without notice. The following diagram illustrates the concept of beacon reception slots and ping slots. 1681 1682 1683 Figure 3: Example of beacon reception slot and ping slots 1684 1685 1686 1687 In this example, given a beacon period of 128s, the end-device also opens a ping-slot 1688 reception window every 32s. Most of the time, this ping slot is not used by the Network Server 1689 and therefore the end-device reception window is closed as soon as the radio transceiver has 1690 assessed that no preamble is present on the radio channel. If a preamble is detected, the 1691 radio transceiver will stay on until the downlink frame is demodulated. The MAC layer will then 1692 process the frame, check that its address field matches the end-device address and that the 1693 MIC is valid before forwarding it to the application layer. The end-device response shown in 1694 this example is optional, depending on the downlink, and, if present, this is a Class A uplink. 1695 gateway End-device End-device RX windows Network beacon transmission Network beacon transmission ping End-device response