Inter-band Carrier Aggregation Timing Configuration
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Solution Overview
Problem
The unclear definitions of inter-band NR Carrier Aggregation (CA) operation and timing requirements for User Equipment (UE) and gNB in mmWave frequency range, specifically for FR 2, hinder effective communication.
Innovation Solution
A method and apparatus for performing inter-band CA, where a wireless communication device receives cell information to determine if PCell and SCell are collocated or non-collocated, and based on this, determines the applicability of inter-band CA, allowing for communication with PCell and SCell while adhering to maximum receive and transmit timing differences (MRTD and MTTD) requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inter-band CA operation is implemented in FR 2 without clear definitions, then communication functionality is provided, but reliability and compliance with timing requirements cannot be ensured
Solution Approach 1:
The patent applies parameter changes by establishing specific timing parameters (MRTD and MTTD) for inter-band CA operations. The base station configures the UE with maximum receive timing difference (MRTD) and maximum transmit timing difference (MTTD) values that are appropriate for the collocated or non-collocated scenario, ensuring reliable timing compliance while maintaining operational versatility
Solution Approach 2:
The patent segments the inter-band CA operation into distinct scenarios based on base station collocation status (collocated vs. non-collocated). This segmentation allows different timing requirement configurations to be applied to each scenario, ensuring reliability within each segment while maintaining overall system adaptability
2Adaptability or versatility
If UE and gNB support for FR 2 inter-band CA is not clearly defined, then deployment flexibility is maintained, but communication reliability deteriorates
Solution Approach 1:
The patent implements dynamic configuration where the base station determines whether the UE and gNB support FR 2 inter-band CA and dynamically configures appropriate timing parameters (MRTD/MTTD) based on the collocation status and capability information. This dynamic approach maintains deployment flexibility while ensuring communication reliability through appropriate parameter selection
3Device complexity
If timing requirements (MRTD and MTTD) are not clearly defined, then implementation complexity is reduced, but communication precision deteriorates
Solution Approach 1:
The patent resolves this contradiction by introducing specific timing parameters (MRTD and MTTD) that provide precise timing synchronization requirements. These parameters are configured by the base station based on the operational scenario, achieving timing precision without requiring complex implementation as the parameters are directly provided through configuration messages
Data Source
AI summary
There is provided a method for performing communication related to inter-band CA. The method is performed by a wireless communication device. The wireless communication device may receive cell information from a PCell. The cell information may include first information that the PCell is collocated with a SCell within a base station or second information that the PCell is not collocated with the SCell. The PCell and the SCell are configured for the inter-band CA. The wireless communication device may perform communication with at least one of the PCell and the SCell.