Radio Gateway: 4
The Radio Gateway forwards all received LoRaWAN radio packets to the Network Server that is connected through an IP back-bone. The Radio Gateway operates entirely at the physical layer. Its role is simply to decode uplink radio packets from the air and forward them unprocessed to the Network Server. Conversely, for downlinks, the Radio Gateway simply executes transmission requests coming from the Network Server without any interpretation of the payload.
Note the following errata on this document: NwkID length fix for type 3 and type 4 NetIDs errata on LoRaWAN backend 1.0.