Network system, network device, and program product
US7720927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Jun 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/40273
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A secondary device receives an instruction message accompanied by a counted value and compares the received counted value with a counted value stored in an internal memory. Thus, it is determined whether the currently received instruction message is the same as a previously received instruction message and an execution of a process based on the previous instruction message was completed. When the received instruction message is not the same, the secondary device transmits a response message after executing a process according to the received instruction message. In contrast, when the instruction message is the same, the secondary device transmits a response message based on a process history in the internal memory without executing the process according to the received instruction message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.