User Tools
wiki:data_transmission
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
wiki:data_transmission [2017/10/17 09:53] mpe |
— (current) | ||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | ====== Data transmission ====== | ||
| - | |||
| - | displays the last message send FIXME | ||
| - | displays the queued messages | ||
| - | |||
| - | make sure to check the emitting power | ||
| - | |||
| - | ===== class A communication ===== | ||
| - | |||
| - | Following each uplink transmission the end-device opens two short receive windows. The receive window start times are defined using the end of the transmission as a reference. | ||
| - | |||
| - | If the network intends to transmit a downlink to an end-device, it will always initiate the transmission precisely at the beginning of one of those two receive windows. | ||
| - | |||
| - | {{:wiki:class_a_transmition.png?450nolink|}} | ||
| - | |||
| - | //Extract from the LoRaWan Specification ([[https://www.lora-alliance.org/ |LoRa-alliance]])// | ||
| - | |||
| - | ===== class C communication ===== | ||
| - | |||
| - | "Class C devices implement the same two receive windows as Class A devices, but they do not close RX2 window until they need to send again. Therefore they may receive a downlink in the RX2 window at nearly any time, including downlinks sent for the purpose of MAC command or ACK transmission. A short listening window on RX2 frequency and data rate is also opened between the end of the transmission and the beginning of the RX1 receive window." | ||
| - | |||
| - | {{:wiki:class_c_transmition.png?600nolink|}} | ||
| - | |||
| - | //Extract from the LoRaWan Specification ([[https://www.lora-alliance.org/ |LoRa-alliance]])// | ||
wiki/data_transmission.1508226788.txt.gz · Last modified: 2020/02/21 11:53 (external edit)
Page Tools
