Sigfox Device                                           Application
+----------------+                                     +--------------+
| APP1 APP2 APP3 |                                     |APP1 APP2 APP3|
+----------------+                                     +--------------+
|   UDP  |       |                                     |     |  UDP   | 
|  IPv6  |       |                                     |     | IPv6   |   
+--------+       |                                     |     +--------+  
| SCHC C/D & F/R |                                     |              |  
|                |                                     |              | 
+-------+--------+                                     +--------+-----+ 
        $                                                       .
        $   +---------+     +--------------+     +---------+    .
        $   |         |     |   Network    |     | Network |    .
        +~~ |Sigfox BS|     |   Gateway    |     |  SCHC   |    .
            |  (RGW)  | === |    (NGW)     | ... |C/D & F/R|.....
            |         |     | Sigfox Cloud |     |         |   IP-based
            +---------+     +--------------+     +---------+   Network
------- Uplink message ------>
                                       <------- Downlink message ------
Legend:
$, ~ : Radio link
= : Internal Sigfox Network
. : External IP-based Network