Overlapping Numerology Sets Reduce Carrier Configuration Complexity
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Solution Overview
Problem
Current wireless communication systems face increased implementation complexity due to the need to support multiple, non-overlapping sets of candidate numerologies for different carriers, which complicates dynamic carrier configuration and increases hardware, protocol, and processing requirements.
Innovation Solution
The use of overlapping sets of candidate numerologies, where a common subset of physical layer parameters is shared across multiple carriers, reduces the total number of numerologies that need to be supported by devices, simplifying hardware and software requirements and reducing control signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple non-overlapping sets of candidate numerologies are supported for different carriers, then diverse traffic types and channel conditions are accommodated, but device complexity and implementation requirements increase
Solution Approach 1:
The patent applies universality by defining a common numerology that can be used across multiple carriers with different center frequencies. Instead of requiring separate numerology configurations for each carrier, a single numerology definition serves multiple carriers, reducing device complexity while maintaining the ability to support diverse traffic types and channel conditions through carrier-specific parameter selections within the common numerology framework
2Adaptability or versatility
If multiple non-overlapping sets of candidate numerologies are configured for different carriers, then spectrum flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent merges the numerology configuration by defining a common set of numerology parameters that applies to multiple carriers. Instead of separately signaling numerology configurations for each carrier, the system combines these into a single common numerology definition, reducing control signaling overhead while maintaining spectrum flexibility through carrier-specific parameter selections
3Reliability
If different physical layer parameters are configured for each carrier, then communication performance is optimized, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by allowing carrier-specific parameter selections within the common numerology framework. Each carrier can have optimized parameters tailored to its specific traffic type and channel conditions, while the overall configuration complexity is reduced through the shared common numerology definition that provides a standardized baseline across all carriers
Data Source
AI summary
It is possible to reduce the implementation complexity associated with dynamic carrier configuration by defining overlapping sets of candidate numerologies for at least some carriers in the network. A common numerology is included in sets of candidate numerologies pre-associated with two different carriers. This reduces the amount of numerologies that need to be supported by the corresponding user equipments (UEs) and base stations, which in turn reduces the complexity of those devices, e.g., less complex hardware, protocol stacks, and software, lower storage and processing requirements, etc. The common numerology specifies a common subset of physical layer parameters for both carriers. In one example, the common numerology specifies the same sub-carrier frequency spacing and symbol duration for both carriers. The common numerology may further specify the same cyclic prefix (CP) length for symbols communicated over both carriers.