Method and apparatus for using video memory to buffer data packets for presentation to a data network
US6477145B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/32
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Router for initiating a data flow control comprises a receiving protocol stack, a controller and an operating system. The controller is programmed to respond to receipt of a congestion message from a fast packet network such as a frame relay or cell relay network to generate a pass through packet message requesting the opening of a virtual data flow control channel between layer N and layer N+2, where typically layer N is layer 2 of a frame relay protocol and layer N+2 is layer 4 of a TCP protocol. Layer 4 may refuse to open the channel, but once a channel is opened, data flow control may be initiated between destination intelligent terminals when congestion is sensed in the fast packet network. Data packets for presentation to a data network can be advantageously stored in buffer memory, which preferably includes unused or otherwise available video display memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.