UE Capability Signaling for Multi-Numerology Carrier Configurations
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently managing carrier configurations with multiple numerologies, leading to limitations in bandwidth allocation and processing burdens for user equipment (UE), particularly in multimedia multicast-broadcast service receive-only modes.
Innovation Solution
User equipment (UE) determines its capability to support different numerologies and transmits information about the supported bandwidth and scaling values, allowing base stations to configure communications that do not exceed the UE's processing limitations, thereby improving performance and efficiency in bandwidth allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If carrier configurations with multiple numerologies are supported, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The UE capability is segmented into multiple numerology-specific capability indicators, where each numerology (e.g., 15kHz, 30kHz, 60kHz subcarrier spacing) has its own capability parameter. This allows the network to selectively activate only the numerologies the UE can handle, avoiding the need to process all possible numerologies simultaneously and thus reducing effective complexity while maintaining versatility.
Solution Approach 2:
The UE dynamically reports its supported numerologies through capability signaling, allowing the network to adaptively configure carriers based on actual UE capabilities rather than assuming fixed support for all numerologies. This dynamic adaptation reduces processing burden on the UE by only activating supported configurations.
2Adaptability or versatility
If multiple carrier numerologies are supported, then bandwidth allocation flexibility is improved, but processing burden on UE increases
Solution Approach 1:
Different capability indicators are assigned to different numerologies based on their specific processing requirements. For example, numerologies with larger subcarrier spacing may have different capability thresholds compared to those with smaller spacing. This localized capability management allows the UE to handle each numerology type with appropriate processing resources, reducing overall burden while maintaining flexibility.
3Manufacturing precision
If carrier capability information is signaled for multiple numerologies, then network configuration accuracy is improved, but information overhead increases
Solution Approach 1:
A unified capability signaling framework is used that can accommodate multiple numerologies through a common message structure. The capability indicators are designed to be universally applicable across different numerology types, allowing the network to extract precise configuration information for each numerology from a single signaling exchange, thereby reducing overall overhead while maintaining accuracy.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a capability of the UE relating to a carrier configuration of the UE, wherein the carrier configuration relates to carriers of at least two different numerologies; and transmit information identifying the capability, wherein the information identifying the capability identifies a bandwidth or number of carriers that is supported for carriers of a first numerology and one or more scaling values associated with one or more numerologies other than the first numerology. A base station may receive information identifying a capability of a UE relating to a carrier configuration of the UE, wherein the carrier configuration relates to carriers of at least two different numerologies; and determine a configuration for communication with the UE based at least in part on the information identifying the capability. Numerous other aspects are provided.