System for manintaining inter-packet gaps in cascade...

Details System for manintaining inter-packet gaps in cascade... System for manintaining inter-packet gaps in cascade...

2005-08-30

2005-08-30

Chin, Wellington (Department: 2664)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S520000

Reexamination Certificate

active

06937624

ABSTRACT:
A unit for receiving and re-transmitting data signals comprising multi-byte packets separated by multi-byte inter-packet gaps includes a FIFO store, a first, write, state machine for controlling the writing of packets into the FIFO and a second, read, state machine for controlling read-out of packets from the FIFO. The first state machine is controlled by a recovered clock and the second state machine is controlled by a local system clock. The first state machine is operative in a writing sequence to write into the FIFO the words of each received packet in successive locations and thereafter to cause the writing into the FIFO of a succession of idle bytes representing a selected inter-packet gap; and the second state machine is operative in response to maintain a reading sequence in arrears of the writing sequence by a selected number of said locations. The arrangement maintains the inter-packet gap despite slight differences between the recovered clock and the system clock.

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