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US 8,266,489 B2Granted
Recovering from a link down event of a two-way serial connection
AssigneeATI Technologies ULC
InventorJaroslaw Grzegorz Marczewski
Life of this patent
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Abstract
A method for surviving a link down event in a two-way serial-connection link. The method includes sequentially numbering packets to be transmitted across the link, successfully transmitted packets being acknowledged and after the link down event. Only packets unacknowledged are retransmitted when a device coupled to the link attempts to survive the event, each unacknowledged packet being retransmitted in accordance with its number within the sequence.
Claims10
A method for surviving a link down event in a two-way serial-connection link, comprising:
- sequentially numbering packets to be transmitted from a first device to a second device across a link, wherein successfully transmitted packets are acknowledged by the second device;
- transmitting an initiation packet by the first device over the link after the link down event;
- and
- determining when the second device coupled to the link is attempting to survive the link down event based on response from the second device to the initiation packet, wherein a negative acknowledgement from the second device indicates the link is attempting to survive the link down event, and wherein a positive acknowledgement from the second device indicates the device is not attempting to survive the link down event.
1 more element
A system for surviving a link down event, comprising:
- a first device coupled to a second device via a two-way serial-connection link;
- a first module configured to sequentially number packets to be transmitted from a first device to a second device across a link, wherein successfully transmitted packets are acknowledged by the second device;
- a second module configured to transmit an initiation packet by the first device over the link after the link down event;
- and
- a third module configured to determine when the second device coupled to the link is attempting to survive the link down event based on response from the second device to the initiation packet, wherein
- a negative acknowledgement from the second device indicates the link is attempting to survive the link down event, and wherein a positive acknowledgement from the second device indicates the device is not attempting to survive the link down event.
3 more elements
Dependencies are inferred from the claim text.