Exploiting Buffering Capabilities

Buffering capability and Sequence information (TCP-BuS).

• Uses explicit route failure notification (routing error) to detect route failures.

• When route failure occurs, intermediate nodes buffer the pending packets and TCP sender doubles the retransmission timeout (RTO) value.

• Makes use of special messages such as localized queries and replies to find a path.

  • Messages modified to carry TCP connection and segment information.

• Avoid timeouts and unnecessary retransmissions.

• Pro: Reduce the number of timeout events → reduce the number of retransmissions.

• Con: Require assistance from intermediate nodes.

  • A special routing protocol is used.