Fly-by serial bus arbitration

Details Fly-by serial bus arbitration Fly-by serial bus arbitration

1995-12-01

1998-09-01

Marcelo, Melvin

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370447, 370462, 370465, H04J 322, H04L 12417

Patent

active

058020578

ABSTRACT:
In a first embodiment, multi-speed concatenated packet strings are transmitted by a first node on a serial bus. To accommodate multi-speed packets, a speed signal is transmitted immediately prior to the packet. In a second embodiment, ACK-concatenation is used to allow a node to transmit a data packet immediately after transmitting an acknowledge signal on the bus. The data packet need not be related to the ACK packet. In a third embodiment, a node which receives a first data packet followed by a data end signal on a child port, concatenates a second data packet onto the first data packet during retransmission. The second data packet is also transmitted down the bus in the direction of the node which originally transmitted the first data packet.

REFERENCES:
patent: 4320520 (1982-03-01), Graham
patent: 5383187 (1995-01-01), Vardakas et al.
patent: 5394556 (1995-02-01), Oprescu
patent: 5495481 (1996-02-01), Duckwall
patent: 5610917 (1997-03-01), Diachina
Digital Interface for Consumer Electronic Audio/Video Equipment, Draft Version 2.0, Philips Electronics N.V Matsushita Electric Ind. Co., Ltd Thomson Multimedia Sony Corporation IEEE 1394 Trade Association Meeting, Oct., 1995, Part 1 pp. 1-47, Part 2 p. 7, Part 3 pp. 1-6.
P1394 Standard for a High Performance Serial Bus, P1394 Draft 8.0v3, Oct. 16, 1995, pp. 1-384.

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