Communication Protocol Intermediary for Error Status Reporting

The patent introduces an HTTP response packet as an intermediary carrier to transmit status information from the device to the PC. When SNMP response generation fails, the device embeds status information (error codes, messages) within the HTTP response packet body, allowing the PC to receive and interpret the failure reason without requiring a traditional SNMP response packet. This mediator approach resolves the contradiction by providing information transmission through an alternative channel.

The patent nests status information within the HTTP response packet structure. Specifically, the status information (including error codes and descriptive messages) is embedded as content within the HTTP response body, creating a nested information structure where the HTTP packet contains both protocol-level status and application-level diagnostic information. This nesting enables comprehensive error reporting without requiring separate communication packets.

The patent implements a feedback mechanism where the device provides detailed status information back to the PC through the HTTP response packet. When an SNMP request is received and cannot be processed, the device generates an HTTP response containing feedback information such as error codes (e.g., 501 Not Implemented, 503 Service Unavailable) and descriptive messages explaining the cause of failure. This feedback enables the PC to understand the specific reason for response generation failure, improving user convenience by eliminating guesswork.

The HTTP response packet serves as an intermediary that carries cause information from the device to the PC. Instead of relying on the absence of an SNMP response to indicate failure, the HTTP packet mediates the communication by explicitly conveying the reason for failure through its body content, making the diagnostic information accessible to the PC and end users.

The patent leverages the universality of the HTTP protocol to achieve reliable error identification without increasing protocol complexity. By using the existing HTTP response packet structure (which is already universally supported for web communication), the device can convey status information through standard HTTP mechanisms. The status information is embedded in the HTTP response body using conventional formatting, allowing the same HTTP infrastructure to serve both information delivery and error reporting functions simultaneously.

The patent changes the parameter being transmitted within the HTTP response packet from typical web content to diagnostic status information. Instead of modifying the HTTP protocol structure itself, the invention utilizes existing HTTP parameters (response body content) and repurposes them to carry error codes and status messages. This parameter repurposing approach enables enhanced error identification capability while maintaining protocol simplicity, as no structural changes to HTTP are required.