Host to modem interface
US6690719B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2000 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Feb 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1671
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus for and a method of interfacing a host to a modem. Data is transferred between the host and the modem via a serial interface. The modem provides the physical layer implementation functions (i.e., transmission and reception functions) in addition to providing low level MAC layer function processing. Functions provided include collision detection, back-off algorithm according to a programmed back-off time, conditional transmission, automatic retransmissions and ACK/NACK packet generation and processing. This serves to eliminate any stringent access timing constraints usually placed on the host processor resulting in reduced cost and complexity of the host.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.