1. Request    2. Request    3. Request
          (U)           (U+A)         (U+A+B)
         +----+        +----+        +----+
         |    |        |    |        |    |
         |    v        |    v        |    v
+--------+    +--------+    +--------+    +--------+    +---------+
| CCNinfo|----| Router |----| Router |----| Router |----|Publisher|
|  user  |    |   A    |    |   B    |    |   C    |    |         |
+--------+    +--------+    +--------+    +--------+    +---------+
                                     \
                                      \          +-------+
                            3. Request \         | Cache |
                               (U+A+B)  \ +---------+    |
                                         v| Caching |----+
                                          |  router |
                                          +---------+