CABLECARD Host Error Processing via New Flow Request Message
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Solution Overview
Problem
Existing data transmission methods between a broadcasting receiver, host, and CABLECARD are unclear in error processing, leading to ambiguity in handling errors such as timeouts and error messages during TCP and UDP communications.
Innovation Solution
A method is introduced where a new flow request message is used to define error processing information, specifying whether the host or CABLECARD should handle timeouts and error messages, with specific fields in the message indicating processing actions for both TCP and UDP communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error processing is not defined in advance, then communication flexibility is maintained, but error handling ambiguity increases leading to unreliable data transmission
Solution Approach 1:
The patent applies preliminary action by defining error processing methods in advance through the new flow request message. The control field specifies which device (host or CABLECARD) should handle timeouts and error messages before errors actually occur, eliminating ambiguity during error handling while maintaining clear responsibility assignment.
2Reliability
If error processing responsibilities are not clearly assigned, then device operations remain simple, but data transmission reliability deteriorates due to ambiguous error handling
Solution Approach 1:
The patent uses the new flow request message as an intermediary carrier that transmits control field information between the host and CABLECARD. This intermediary mechanism clearly assigns error processing responsibilities by embedding responsibility indicators in the message, making error handling operations transparent and unambiguous for both devices.
3Reliability
If timeout control subject is not specified, then communication setup is simple, but timeout error processing becomes ambiguous affecting communication reliability
Solution Approach 1:
The patent applies local quality by creating a dedicated timeout control field within the new flow request message that specifies the timeout control subject (host or CABLECARD). This localized control mechanism assigns timeout handling responsibility to a specific device without complicating the overall communication protocol, maintaining simplicity while improving reliability.
4Productivity
If error message processing method is not defined, then communication protocol remains simple, but operational efficiency decreases due to uncertain error handling procedures
Solution Approach 1:
The patent applies preliminary action by pre-defining error message processing methods in the control field of the new flow request message. This allows both host and CABLECARD to know in advance how to handle error messages, eliminating operational uncertainty and improving data transmission efficiency without adding significant complexity to the communication protocol.
Data Source
AI summary
A data transmitting and receiving method and a broadcasting receiver are disclosed. A CABLECARD transmits a new flow request message for requesting a connection of a data transmitting and receiving path to a host. The host receiving the new flow request message transmits a new flow response message to the CABLECARD. The new flow request message includes a control field for recording processing information on an error generated during communication.