10 Uplink frame in Class B mode
- The uplink frames in Class B mode are same as the Class A uplinks with the exception of
- the RFU bit in the FCtrl field in the Frame header. In the Class A uplink this bit is unused
- (RFU). This bit is used for Class B uplinks.
5
| Bit# | 7 | 6 | 5 | 4 | 3..0 |
|---|---|---|---|---|---|
| FCtrl | ADR | ADRACKReq | ACK | Class B | FOptsLen |
6
- The Class B bit set to 1 in an uplink signals the network server that the device as switched to
- Class B mode and is now ready to receive scheduled downlink pings.
9
- The signification of the FPending bit for downlink is unaltered and still signals that one or
- more downlink frames are queued for this device in the server and that the device should
- keep is receiver on as described in the Class A specification.
13
©2016 LoRa™ Alliance Page 42 of 70
The authors reserve the right to change specifications without notice.
LoRaWAN Specification