Data processing device
US6647442B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Dec 8, 1999 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Dec 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2545
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To avoid a reduction in the efficiency of data transmission of a data processing device that conducts data communications using a serial bus that conforms to the IEEE 1394 Standards.The data processing device 1 has a calculator 9 and a comparator 8. The calculator 9 calculates the data volume of a response packet intended for reception that corresponds to a request packet intended for transmission when an attempt is made to transmit these packets, the comparator 8 compares the data volume of the response packet intended for reception and the empty volume of the receiving buffer 7, and when the empty volume of the receiving buffer 7 is smaller than the data volume of the response packet intended for reception, the packet transmitting device 3 does not transmits the request packet intended for transmission to the IEEE 1394 bus 6, and if the empty volume of the receiving buffer is too small and the response packet cannot be received, the request packet is not transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.