RLC Entity Selective Reset for Wireless Protocol Error Handling

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Solution Overview

Problem

In wireless communications systems, existing methods for handling protocol errors in Acknowledged Mode lead to unnecessary data deletion and resource wastage due to simultaneous resetting of both uplink and downlink RLC layers, reducing transmission efficiency.

Innovation Solution

Implementing a method to reset only the transmitting side of the RLC entity when a protocol error is detected, thereby preventing data deletion and resource wastage by maintaining the receiving side's operation intact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the reset procedure is executed to handle protocol errors, then transmission reliability is improved, but transmission efficiency deteriorates due to unnecessary data deletion

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the RLC entity into two independent sides: transmitting side and receiving side. When a protocol error is detected, only the transmitting side is reset while the receiving side continues operation. This segmentation allows selective resetting that maintains reliability for error handling while preserving efficiency by avoiding unnecessary resets of the receiving side that has valid data.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by making the transmitting side and receiving side have different operational states after error detection. The transmitting side undergoes reset (local change) while the receiving side maintains its current state. This localized adjustment ensures that reliability is improved where needed (transmitting side) without unnecessarily affecting the receiving side's efficient operation.

Inventive Principle:

Principle #3Local quality

2Reliability

If the reset procedure is executed to handle protocol errors, then protocol error prevention is improved, but system resource utilization deteriorates

Engineering Contradiction:

Improveprotocol error preventionVSAvoidsystem resource utilization

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent divides the RLC entity into transmitting side and receiving side, enabling selective resetting. Only the transmitting side is reset when protocol errors are detected, while the receiving side continues to utilize buffered data without reset. This segmentation prevents unnecessary system resource wastage while maintaining protocol error prevention capabilities.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent selectively discards (resets) only the transmitting side state variables and buffers when protocol errors occur, while recovering and preserving the receiving side's valid buffered data. This selective discarding and recovering approach prevents complete resource wastage that would occur with full reset, thereby improving system resource utilization while maintaining error prevention.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentEP1796301B1Method and apparatus for RLC protocol error handling

Publication Date: 2010.07.21 INNOVATIVE SONIC LTD

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AI summary

A method for radio link control error handling procedure in a wireless communications system including a first communication device (100) and a second communication device includes a first radio link control entity of the first communication device only resetting a transmitting side of the first radio link control entity when a protocol error is detected.