Multi-Mode Coverage Enhancement via Lookup-Table Transmission
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Solution Overview
Problem
Existing 5G NR technologies require improvements in managing coverage enhancement modes to accommodate diverse user equipment capabilities and channel conditions effectively.
Innovation Solution
A base station maintains a lookup table with parameters for multiple coverage enhancement modes, selecting an appropriate mode based on user equipment capabilities, channel conditions, and scheduling control and data channels using defined transmission schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple coverage enhancement modes are defined and maintained for different user equipment types, then adaptability to diverse channel conditions and device capabilities is improved, but system complexity increases
Solution Approach 1:
The patent segments the coverage enhancement functionality into multiple distinct modes (CE mode A and CE mode B), each with specific parameter sets tailored to different user equipment types. This segmentation allows the base station to handle diverse device requirements through modular, pre-defined configurations rather than managing a single complex configuration system.
Solution Approach 2:
The patent implements preliminary action by pre-defining multiple coverage enhancement modes with all necessary parameters (PDCCH aggregation levels, PDSCH/PUSCH coding rates, repetition numbers) before actual communication occurs. This allows user equipment to quickly select appropriate modes based on their capabilities without requiring complex real-time configuration negotiations.
2Reliability
If coverage enhancement modes are optimized for specific user equipment capabilities, then communication reliability for those devices is improved, but device compatibility across different types deteriorates
Solution Approach 1:
The patent creates universal coverage enhancement modes that can serve multiple user equipment types. CE mode A is designed to support both enhanced coverage requirements and regular capabilities, while CE mode B accommodates reduced capabilities. This multi-functionality allows a single mode definition to serve diverse device categories without requiring device-specific customizations.
Solution Approach 2:
The patent employs parameter changes by adjusting key transmission parameters (aggregation levels, coding rates, repetition numbers) within each coverage enhancement mode to match different user equipment capabilities. These parameter variations enable the same coverage enhancement framework to adapt to diverse device types, maintaining both reliability and compatibility.
3Manufacturing precision
If transmission schemes are customized for different coverage enhancement modes, then data transmission quality is improved, but processing overhead increases
Solution Approach 1:
The patent applies parameter changes by defining specific transmission parameters for each coverage enhancement mode, including PDCCH aggregation levels (e.g., 4, 8, 16 for CE mode A; 8, 16, 32 for CE mode B), PDSCH/PUSCH coding rates, and repetition numbers. These parameter variations enable optimized data transmission quality for different device types while maintaining manageable processing complexity through standardized parameter sets.
4Area of stationary object
If coverage enhancement parameters are adjusted for extended coverage areas, then coverage area is improved, but data rate deteriorates
Solution Approach 1:
The patent implements parameter changes by adjusting transmission parameters within coverage enhancement modes to balance coverage area and data rate. For extended coverage scenarios, the system increases aggregation levels and repetition numbers while accepting lower data rates, whereas for better coverage conditions, it reduces these parameters to maintain higher throughput. This dynamic parameter adjustment enables flexible trade-offs between coverage and data rate based on actual channel conditions.
Data Source
AI summary
Aspects of the disclosure relate to maintaining, defining, configuring and implementing a coverage enhancement mode defined for radio access network. A base station may maintain parameters that define multiple coverage enhancement modes in a lookup table and may select a first coverage enhancement mode from the two or more coverage enhancement modes for use with a first user equipment to accommodate use of one or more carrier frequencies, time or frequency duplexing mode, cell size, capabilities of the first user equipment or a channel measurements report of the first user equipment, and schedule a set of control and data channels to be used for communicating with the first user equipment using a first transmission scheme defined by first parameters associated with the first coverage enhancement mode. The set of control and data channels may include uplink control and data channels and downlink control and data channels.