iccrg-5----Page:13
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Challenge 1: Router Support Feedback signaling Explicit notification mechanisms can be realized by out-of-band signaling: requires additional protocols and can be further subdivided into path-coupled and path-decoupled approaches in-band signaling: notifications are piggy-packet along with data traffic, there is less overhead and implementation complexity remains limited Open issues: At which protocol layer should the feedback occur (IP/network layer assisted, transport layer assisted, hybrid solutions, shim layer /intermediate sub-layer, etc.) ? What is the optimal frequency of feedback (only in case of congestion events, per RTT, per packet, etc.) ? |