+--------+
                          | Router |
                          |   B    |
                          +--------+
                         /          \
                        /            \
+--------+    +--------+              +--------+     +---------+
| CCNinfo|----| Router |              | Router | ... |Publisher|
|  user  |    |   A    |              |   D    |     |         |
+--------+    +--------+              +--------+     +---------+
                        \            /
                         \          /
                          +--------+
                          | Router |
                          |   C    |
                          +--------+