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Whitepaper: Reorder Notifying TCP (RN-TCP) With Explicit Packet Drop Notification (EPDN)

by King's College LondonJan 01, 2008

Packet reordering occurs naturally as a result of local parallelism: a packet can traverse through multiple paths within a device. Packet reordering also occurs mainly due to route changes: if the new route offers a lower delay than the old one, then reordering occurs. A network path that suffers from persistent packet reordering will have severe performance degradation. TCP has two basic methods of finding out that a segment has been lost. The paper proposes to extend the TCP protocol to enable