Control Protocol Data Unit With Processing Time Information
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Solution Overview
Problem
In UMTS networks, control protocol data units (CPDUs) are often delivered out of sequence, leading to communication errors as the receiver cannot determine the correct RLC PDU to process the CPDU, causing issues with proper communication.
Innovation Solution
Incorporating processing time information, such as sequence numbers, into the CPDU to indicate when the receiver should process it, ensuring error-free communication even with out-of-sequence delivery by aligning processing with the indicated sequence number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control protocol data units are transmitted without processing time information, then transmission overhead is reduced, but communication errors occur when PDUs are delivered out of sequence
Solution Approach 1:
The patent applies preliminary action by including processing time information (such as sequence numbers or time stamps) in the control protocol data unit before transmission. This allows the receiver to determine the correct processing order in advance, even when packets arrive out of sequence, thereby preventing communication errors without requiring complex retransmission protocols.
Solution Approach 2:
The patent uses processing time information as an intermediary element that mediates between the transmitted control data and the receiver's processing logic. This intermediary carries timing or sequence information that enables the receiver to correctly order and process out-of-sequence packets, resolving the contradiction between transmission simplicity and communication reliability.
2Reliability
If processing time information is added to control protocol data units, then out-of-sequence delivery errors are prevented, but protocol overhead increases
Solution Approach 1:
The patent applies partial action by selectively adding processing time information only to control protocol data units that require ordered processing, rather than adding comprehensive timing data to all packets. This selective approach provides sufficient information to prevent out-of-sequence errors while minimizing protocol overhead and avoiding unnecessary data transmission.
3Productivity
If the receiver processes control protocol data units immediately upon receipt, then processing speed is improved, but errors occur when packets arrive out of sequence
Solution Approach 1:
The patent applies preliminary action by embedding processing time information in the control protocol data unit before transmission. This allows the receiver to perform buffer management and ordering operations in advance based on the included timing information, enabling fast processing without sacrificing reliability even when packets arrive out of sequence.
Solution Approach 2:
The control protocol data unit essentially serves itself by carrying its own processing time information. The receiver can autonomously determine the correct processing order using this self-contained information without requiring external coordination or complex acknowledgment protocols, thus maintaining both high processing speed and communication reliability.
Data Source
AI summary
The present invention relates to transmitting and receiving control protocol data. A transmitter transmits a control protocol unit having processing time information, wherein the processing time information indicates to a receiver of when to process the control protocol data unit. Accordingly, the receiver processes the control protocol data unit according to the processing time information.