Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2006-04-25
2006-04-25
Ngo, Ricky Q. (Department: 2663)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S394000, C370S432000, C370S448000, C714S748000
Reexamination Certificate
active
07035258
ABSTRACT:
A method and system for multicast network transmissions dynamically sets response time parameters for handling negative acknowledgments (NAKs). When the sender receives a NAK for a lost packet, it returns an NAK confirmation (NCF), waits for a back-off time before sending requested repair data, and then waits for a “linger time” during which the sender does not respond to other NAKs for the same lost packet. The back-off time and the linger time are dynamically set according to the position of the requested sequence number in the sender's transmit window such that the back-off time is shorter when the requested data is closer to being flushed out of the transmit window. After receiving the NCF, the receiver waits for a timeout period and resends the NAK if no repair data is received. The timeout period for data receipt is dynamically set according to a statistical average time for receiving repair data from the sender and the estimated sender's transmit window size.
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Alam Mohammad Shabbir
Bahl Pradeep
Koti Shirish
Amin & Turocy LLP
Chang Richard
Microsoft Corporation
Ngo Ricky Q.
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