System for manintaining inter-packet gaps in cascade transmission system for packet-based data
US6937624B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0632
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.