Method and apparatus for latency management of data communication over serial bus

An apparatus comprising:

• a plurality of serial buses;
• a first device coupled to a first serial bus of the plurality of serial buses through a first interface and coupled to a second serial bus of the plurality of serial buses through a second interface;
• and
• a second device coupled to the first serial bus and the second serial bus,
• wherein the first device is configured to:
• receive a datagram to be transmitted from the first device to the second device, wherein the datagram is associated with a latency budget;
• determine whether the first serial bus is available to transmit the datagram, wherein the first serial bus is available to transmit the datagram when the first serial bus is active and likely to transmit the datagram within a time limit defined by the latency budget;
• determine whether the second serial bus is available to transmit the datagram, wherein the second serial bus is available to transmit the datagram when the second serial bus is active and likely to transmit the datagram within the time limit defined by the latency budget;
• transmit the datagram over the first serial bus when the first serial bus is available;
• and
• transmit the datagram over the second serial bus when the second serial bus is available and when the first serial bus is not available.

A processor-readable storage medium comprising code for:

• receiving a datagram to be transmitted from a transmitting device to a receiving device, wherein the datagram is associated with a latency budget;
• determining whether a first serial bus coupling the transmitting device to the receiving device is available to transmit the datagram, wherein the first serial bus is available to transmit the datagram when the first serial bus is active and likely to transmit the datagram within a time limit defined by the latency budget;
• determining whether a second serial bus coupling the transmitting device to the receiving device is available to transmit the datagram, wherein the second serial bus is available to transmit the datagram when the second serial bus is active and likely to transmit the datagram within the time limit defined by the latency budget;
• transmitting the datagram over the first serial bus when the first serial bus is available;
• and
• transmitting the datagram over the second serial bus when the second serial bus is available and when the first serial bus is not available.

An apparatus comprising:

• means for receiving a datagram to be transmitted from a transmitting device to a receiving device, wherein the datagram is associated with a latency budget;
• means for determining whether a first serial bus coupling the transmitting device to the receiving device is available to transmit the datagram;
• means for determining whether a second serial bus coupling the transmitting device to the receiving device is available to transmit the datagram;
• and
• means for transmitting the datagram, wherein the datagram is transmitted over the first serial bus when the first serial bus is active and likely to transmit the datagram within a time limit defined by the latency budget, and wherein the datagram is transmitted over the second serial bus when the second serial bus is active and likely to transmit the datagram within the time limit defined by the latency budget and when the first serial bus is not active or unlikely to transmit the datagram within the time limit defined by the latency budget.