Flexible L1 Measurement Interruption For UE Power Reduction
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Solution Overview
Problem
In mobile communications, user equipment (UE) faces high power consumption when performing synchronization signal block (SSB)-based L1 measurements outside its active bandwidth part (BWP), as there is no defined UE behavior for synchronization, leading to potential interference with data transmission and lower throughput.
Innovation Solution
The UE reports a need for communication interruptions to the network, allowing it to perform measurements outside its active BWP by temporarily suspending downlink or uplink transmissions, enabling RF re-tuning and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE keeps its RF BWP sufficiently large to cover both the BWP and the SSB without RF re-tune, then measurement capability is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the RF BWP configuration adaptive rather than static. The network dynamically configures the RF BWP size based on whether SSB measurements are required outside the active BWP. When SSB-based L1 measurements are needed outside the active BWP, the network configures a larger RF BWP to cover both the active BWP and the SSB frequency location, eliminating the need for RF re-tuning and reducing power consumption while maintaining measurement capability.
2Reliability
If the network configures a measurement gap for the UE to measure the SSB outside its active BWP, then measurement capability is improved, but data transmission and reception are affected resulting in lower throughput
Solution Approach 1:
The patent applies preliminary action by pre-configuring the RF BWP to be sufficiently large to cover both the active BWP and the SSB frequency location before measurements are needed. This preliminary configuration eliminates the need for subsequent measurement gaps that would interrupt data transmission. The network proactively adjusts the RF BWP size based on UE capability and measurement requirements, allowing continuous data transmission while enabling SSB measurements outside the active BWP.
3Reliability
If the UE performs L1 measurements outside its active BWP without defined behavior, then measurement flexibility is reduced, but communication reliability improves
Solution Approach 1:
The patent applies parameter changes by modifying the RF BWP configuration parameter based on measurement requirements. The network configures the RF BWP size and frequency location parameters dynamically according to whether SSB-based L1 measurements are required outside the active BWP. This parameter adjustment enables the UE to perform measurements outside the active BWP with well-defined behavior, achieving both communication reliability and measurement flexibility.
Data Source
AI summary
Examples pertaining to flexible interruption for layer 1 (L1) measurement in mobile communications are described. A user equipment (UE) reports to a network a need for an interruption in communications between the UE and the network. The UE then performs a measurement of one or more resources during the interruption.