+----------+                           +---------+
             |  -----   |                           |   BGP   |
             | | TED |<-+-------------------------->| Speaker |
             |  -----   |   TED synchronization     |         |
             |    |     |        mechanism          +---------+
             |    |     | 
             |    v     |
             |  -----   |
             | | PCE |  |
             |  -----   |
             +----------+
                  ^
                  | Request/
                  | Response
                  v
    Service  +----------+   Signaling  +----------+
    Request  | Head-End |   Protocol   | Adjacent |
    -------->|  Node    |<------------>|   Node   |
             +----------+              +----------+