5G NR Bandwidth Part Mismatch Detection During BWP Switching
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Solution Overview
Problem
There is a need to improve detection and recovery of Bandwidth Part (BWP) out-of-sync issues in 5G/New Radio (NR) environments, particularly during BWP switching, to ensure seamless communication and prevent mismatches that can occur when a terminal transitions to a BWP not configured for its communication needs.
Innovation Solution
The terminal is equipped with mechanisms to detect BWP mismatches using timer-based algorithms, specific service information, and Scheduling Request (SR) or Random Access Channel (RACH) resources, enabling recovery operations to switch back to the original BWP when a mismatch is identified.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If BWP switching is implemented to enable flexible bandwidth adaptation, then adaptability is improved, but reliability deteriorates due to potential mismatches and communication disruptions
Solution Approach 1:
The patent implements feedback mechanisms where the terminal reports BWP switching status to the network, and the network provides feedback on received signals. This feedback loop enables detection of mismatches between terminal and network BWPs and facilitates coordinated recovery actions to maintain communication reliability during bandwidth adaptation.
Solution Approach 2:
The patent employs preliminary actions by configuring multiple BWPs in advance and establishing recovery windows before actual mismatches occur. The terminal pre-configures alternative BWPs and monitoring mechanisms, enabling rapid switching and recovery operations when mismatches are detected, thus maintaining reliability during adaptation.
2Productivity
If BWP switching operations are performed to optimize communication performance, then productivity is improved, but loss of time increases due to detection and recovery procedures
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple BWPs with their parameters before actual switching is needed. This allows the terminal to quickly select and switch to alternative BWPs without time-consuming configuration procedures, reducing transition time while maintaining high communication efficiency during optimization operations.
Solution Approach 2:
The patent implements rapid switching by skipping unnecessary intermediate steps in the BWP transition process. When a mismatch is detected, the terminal can directly switch to pre-configured alternative BWPs without going through full reconfiguration procedures, thus minimizing time loss while preserving communication efficiency.
3Adaptability or versatility
If BWP switching indicator is processed to enable bandwidth parts switching, then adaptability is improved, but device complexity increases due to additional detection and recovery mechanisms
Solution Approach 1:
The patent applies universality by designing a multi-functional BWP management mechanism where the same detection and recovery components serve multiple purposes: monitoring switching status, detecting mismatches, executing recovery operations, and coordinating with the network. This reduces overall device complexity while maintaining high adaptability for BWP switching.
Solution Approach 2:
The patent implements self-service by enabling the terminal to autonomously detect BWP mismatches and execute recovery operations without requiring complex external control. The terminal monitors its own switching status, identifies issues, and autonomously switches to alternative BWPs, simplifying the overall system architecture while preserving switching adaptability.
Data Source
AI summary
A terminal may include configured to receive, from a network, multiple downlink signals. The terminal may include a processor configured to identify, from the downlink signals, at least one configuration parameter including a bandwidth part switching indicator. The processor may then identify at least one resource from a target bandwidth part indicated by the bandwidth part switching indicator. The processor may then determine a bandwidth part mismatch based on whether a signal is received using the at least one resource from the target bandwidth part.