+--------+                 +-------+                 +--------+
| pledge |                 |  JP   |                 |  JRC   |
|        |                 |       |                 |        |
+--------+                 +-------+                 +--------+
   |                          |                          |
   |<---Enhanced Beacon (1)---|                          |
   |                          |                          |
   |<-Neighbor Discovery (2)->|                          |
   |                          |                          |
   |-----Join Request (3a)----|----Join Request (3a)---->| \
   |                          |                          | | CoJP
   |<----Join Response (3b)---|----Join Response (3b)----| /
   |                          |                          |