Suspend LBT Failure Detection During Cell Handover
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Solution Overview
Problem
Existing mechanisms for consistent LBT failure detection and recovery during cell handover in communication technologies lead to unnecessary connection reestablishment, causing interruptions and degrading user experiences due to incorrect handling of consistent uplink LBT failures.
Innovation Solution
Implementing a mechanism that suspends data transmission and/or reception with the network device and halts consistent LBT failure detection and recovery during cell handover, preventing unnecessary connection reestablishment by managing LBT failure indications and timers to avoid false radio link failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If consistent LBT failure detection and recovery mechanism is implemented during cell handover, then LBT failure can be detected and recovered, but unnecessary connection reestablishment occurs causing service interruption
Solution Approach 1:
The patent applies preliminary action by suspending the consistent LBT failure detection and recovery mechanism before it can cause harmful effects during cell handover. When the MAC entity detects that it is in handover execution state (timer T304 is running), it proactively suspends the LBT failure detection process, preventing false radio link failure detection that would otherwise occur during the handover process. This preliminary suspension avoids the need for unnecessary connection reestablishment and maintains service continuity.
2Measurement precision
If LBT failure indication is processed during cell handover, then failure detection is performed, but false radio link failure is triggered
Solution Approach 1:
The patent applies preliminary action by suspending the consistent LBT failure detection and recovery mechanism before it can cause harmful effects during cell handover. When the MAC entity detects that it is in handover execution state (timer T304 is running), it proactively suspends the LBT failure detection process, preventing false radio link failure detection that would otherwise occur during the handover process. This preliminary suspension avoids the need for unnecessary connection reestablishment and maintains service continuity.
Solution Approach 2:
The patent uses the timer T304 as an intermediary to mediate between the LBT failure detection mechanism and the handover process. The timer state serves as a control signal that enables or disables the LBT failure detection. When T304 is running (handover in progress), the intermediary mechanism suspends LBT failure detection; when T304 expires (handover complete), normal detection resumes. This intermediary approach prevents false detections during handover while maintaining accurate detection during normal operation.
3Reliability
If connection reestablishment is performed during cell handover, then radio link failure is recovered, but service interruption occurs
Solution Approach 1:
The patent applies preliminary action by suspending the consistent LBT failure detection and recovery mechanism before it can cause harmful effects during cell handover. When the MAC entity detects that it is in handover execution state (timer T304 is running), it proactively suspends the LBT failure detection process, preventing false radio link failure detection that would otherwise occur during the handover process. This preliminary suspension avoids the need for unnecessary connection reestablishment and maintains service continuity.
Data Source
AI summary
A method and apparatus for consistent LBT failure detection and recovery in cell handover. The method is applicable to a terminal equipment and includes receiving a consistent LBT failure indication during cell handover, and suspending data transmission and/or reception with a network device and/or suspending consistent LBT failure detection and recovery during the cell handover.