Apparatus and method for formatting variable length data packets for a transmission network
US5189671A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/568
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmit control store is provided for assembling recurrent data packets of information for transmission over an optical fiber communications network from a host digital terminal to a variable number of optical network units, wherein each optical network unit serves a variable number of individual subscriber stations, and wherein each frame contains a programmed number of optical network unit packets wherein each packet has a byte length related to the number of subscriber stations served and bandwidth required thereby. The transmit control store includes a user data buffer storage memory for storing user data bytes, a control memory for storing a control pattern for controlling the format of the packet, an overhead memory for storing packet overhead data at predetermined storage locations therein, a control byte counter for generating and simultaneously applying address values to the control memory and to the overhead memory, and decoding logic for decoding control bytes put out by the control memory to control selective data output of the user data buffer storage memory and the overhead memory. Each byte in the overhead memory has a storage which numerically corresponds to a va…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.