System and method for enabling replay using a packetized link protocol

Patent metadata

Field	Value
Publication number	US-9954984-B2
Application number	US-201514883322-A
Country	US
Kind code	B2
Filing date	Oct 14, 2015
Priority date	Oct 14, 2015
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A receiver, transmitter and method for enabling a replay using a packetized link protocol are provided. In one embodiment, the method includes: (1) transmitting a stream of packets including an untagged packet and (2) using synchronized counters to determine a sequence ID of the untagged packet, which is a corrupt/lost packet that needs to be retransmitted.

First claim

What is claimed is:

1. A method for enabling a replay using a packetized link protocol, comprising:
transmitting a stream of packets including an untagged packet;
using counters to determine a sequence ID of said untagged packet; and
synchronizing said counters using a non-replayable initiation packet before said replay, said non-replayable initiation packet not being acknowledged using a sequence ID.

2. The method as recited in claim 1 , wherein said counters include a first sequence ID counter at a transmitter with a second sequence ID counter at a receiver.

3. The method as recited in claim 1 , further comprising synchronizing said counters when a data channel bearing said stream is idle.

4. The method as recited in claim 1 , further comprising sending a first initiation packet that includes a sequence ID of a first packet of said stream.

5. The method as recited in claim 1 , further comprising determining whether said untagged packet is lost by using a Cyclic Redundancy Check calculated against the sequence ID of said untagged packet.

6. The method as recited in claim 1 , further comprising sending said non-replayable initiation packet that includes a sequence ID of a first packet in said replay.

7. The method as recited in claim 1 , wherein a first packet of said stream is tagged.

8. A transmitter for enabling a replay using a packetized link protocol, comprising:
a physical layer interface configured to transmit a stream of packets including an untagged packet; and
a transmitter sequence ID counter synchronized with a receiver sequence ID counter and configured to count a number of received packets in said stream, wherein said transmitter sequence ID counter and said receiver sequence ID counter are used to determine a sequence ID of said untagged packet, and said transmitter sequence ID counter is synchronized with said receiver sequence ID counter using a non-replayable initiation packet before said replay, said non-replayable initiation packet not being acknowledged using a sequence ID.

9. The transmitter as recited in claim 8 , wherein said transmitter sequence ID counter is synchronized with said receiver sequence ID counter when a data channel bearing said stream is idle.

10. The transmitter as recited in claim 8 , wherein said physical layer interface is further configured to send a first initiation packet that includes a sequence ID of a first packet of said stream.

11. The transmitter as recited in claim 8 , wherein said untagged packet is a corrupt/lost packet.

12. The transmitter as recited in claim 8 , wherein said physical layer interface is further configured to send said non-replayable initiation packet that includes a sequence ID of a first packet of said replay.

13. The transmitter as recited in claim 8 , wherein a first packet of said stream is tagged.

14. The transmitter as recited in claim 8 , wherein a first packet of said replay is tagged.

15. A receiver for enabling a replay using a packetized link protocol, comprising:
a physical layer interface configured to receive a stream of packets including an untagged packet; and
a receiver sequence ID counter synchronized with a transmitter sequence ID counter and configured to count a number of received packets in said stream, wherein said receiver sequence ID counter and said transmitter sequence ID counter are used to determine a sequence ID of said untagged packet, and said receiver ID counter is synchronized with said transmitter sequence ID counter using a non-replayable initiation packet before said replay, said non-replayable initiation packet not being acknowledged using a sequence ID.

16. The receiver as recited in claim 15 , wherein said receiver sequence ID counter is synchronized with said transmitter sequence ID counter when a data channel bearing said stream is idle.

17. The receiver as recited in claim 15 , wherein said physical layer interface is further configured to receive a first initiation packet that includes a sequence ID of a first packet of said stream.

18. The receiver as recited in claim 15 , wherein said physical layer interface is further configured to receive said non-replayable initiation packet that includes a sequence ID of a first packet of said replay.

19. The receiver as recited in claim 15 , wherein a first packet of said stream is tagged.

20. The receiver as recited in claim 15 , wherein a first packet of said replay is tagged.

Assignees

• Nvidia Corp

Inventors

• Ma Dennis
• Osborn Michael
• Tyson Eric
• Glaser Stephen D
• Denman Marvin
• Owen Jonathan
• Hummel Mark

Classifications

• H04L1/1809

  Selective-repeat protocols · CPC title

• H04L69/323

  in the physical layer [OSI layer 1] · CPC title

• H04L69/324 Primary

  in the data link layer [OSI layer 2], e.g. HDLC · CPC title