RRC Procedure Re-initiation Efficiency in LTE Wireless Systems
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Solution Overview
Problem
In LTE wireless communication systems, unexpected contention resolution messages lead to time delays in RRC procedure re-initiation due to UEs not immediately re-initiating the random access preamble procedure, affecting communication quality.
Innovation Solution
A method where a UE initiates an RRC procedure, transmits an RRC request message after a random access preamble, and immediately re-initiates the preamble if the received contention resolution message does not belong to the initiated procedure, allowing for immediate restart of the RRC procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE waits for timer expiration before re-initiating random access preamble procedure upon receiving unexpected contention resolution message, then the system maintains stability and proper error handling, but the RRC procedure re-initiation speed deteriorates
Solution Approach 1:
The patent applies dynamics by making the UE's response behavior adaptive based on the type of received message. When an unexpected contention resolution message is received, the UE dynamically switches from a passive waiting state (timer-based) to an active re-initiation state, allowing the system to maintain reliability through structured error handling while improving re-initiation speed through conditional immediate action.
Solution Approach 2:
The patent changes the temporal parameter of the re-initiation process. Instead of always waiting for timer expiration, the UE modifies its behavior by immediately re-initiating the random access preamble procedure when specific conditions are met (receiving unexpected contention resolution message), thereby changing the time parameter from a fixed delay to a conditional immediate action.
2Productivity
If a UE immediately re-initiates random access preamble procedure upon receiving unexpected contention resolution message, then the RRC procedure re-initiation efficiency is improved, but the system may experience increased contention and interference
Solution Approach 1:
The patent applies preliminary anti-action by having the UE clear the buffer of the unexpected contention resolution message before re-initiating the random access preamble procedure. This preliminary action prevents the harmful effect of processing or propagating incorrect message data, while the immediate re-initiation maintains high efficiency. The buffer clearing acts as a preventive measure against potential interference from malformed data.
3Measurement precision
If the UE clears the buffer of unexpected contention resolution message before re-initiating, then message processing accuracy is improved, but the complexity of message handling increases
Solution Approach 1:
The patent applies the extraction principle by removing (clearing) the unexpected contention resolution message from the buffer before re-initiating the random access procedure. This extraction of the problematic message element improves processing accuracy by preventing potential errors from propagating, while the operation remains simple and does not significantly increase handling complexity.
Data Source
AI summary
A method for enhancing efficiency of RRC (Radio Resource Control) procedure re-initiation for a user equipment (UE) in a wireless communication system is provided. The UE includes a plurality of RRC procedures, which are started with a random access preamble procedure. The method includes initiating an RRC procedure of the plurality of RRC procedures, initiating the random access preamble procedure corresponding to the initiated RRC procedure, transmitting an RRC request message corresponding to the initiated RRC procedure after completion of the random access preamble procedure e, and re-initiating the random access preamble procedure when receiving a contention resolution message which corresponds to the random access preamble procedure, but does not belong to the initiated RRC procedure.