User Equipment Measurement Gap Configuration via Subcarrier Spacing
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Solution Overview
Problem
Current methods for user equipment (UE) in cellular networks to request measurement gaps for target cell assessments are inadequate, as they do not account for all situations where gaps are needed, leading to unnecessary gaps being provided.
Innovation Solution
A system and method where a UE determines gap information based on target band frequency and subcarrier spacing information received from the serving base station, allowing it to selectively request time slots for measurements, and the base station can override UE assumptions about subcarrier spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE requests measurement gaps based only on current configured band combination, then the UE can perform measurements on target cells, but measurement gaps are allocated even when not actually needed, reducing network efficiency
Solution Approach 1:
The patent changes the parameters used for gap determination from only band combination to include subcarrier spacing (SCS) information. The UE now determines gap requirements by comparing SCS values between serving and target cells, allowing more precise control over when gaps are actually needed, thus improving network efficiency while maintaining measurement reliability
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports SCS information and gap requirements to the network, and the network uses this feedback to make informed decisions about gap allocation. This feedback loop ensures gaps are allocated only when necessary, resolving the contradiction between reliable measurement and network efficiency
2Productivity
If the UE determines gap information based on both frequency and subcarrier spacing, then unnecessary gaps are reduced, but the complexity of gap determination increases
Solution Approach 1:
The patent segments the gap determination process into distinct steps: first comparing frequency information, then comparing subcarrier spacing values, and finally determining gap requirements based on the combination. This segmentation makes the complex determination process more manageable and systematic, reducing the perceived complexity while improving resource allocation efficiency
Solution Approach 2:
The patent applies preliminary action by having the network provide SCS information in advance through RRC messages before the UE needs to make gap determination decisions. This preliminary provision of information simplifies the UE's task and reduces the complexity of real-time gap determination while improving overall efficiency
Data Source
AI summary
A system for determining and reporting user equipment (UE) time gap requirement information for performing a measurement on a reference signal provided by a target base station. A UE receives a radio resource control (RRC) message from a current base station to modify a current RRC connection. The RRC configuration message may comprise sub carrier spacing (SCS) information of one or more target frequency bands of at least one target base station. The UE may then determine gap information based at least in part on the received SCS information of the one or more target frequency bands. The gap information may indicate whether a gap is needed in performing measurements on a reference signal transmitted at each of the one or more target frequency bands. The UE then transmits the gap information to the current base station.