Band Combination Prioritization for Dual Connectivity
Solution Overview
Problem
In the MR-DC (Multi Radio Access Technology dual connectivity) system, user devices face challenges in determining the appropriate band combinations for simultaneous communication between LTE and NR systems, as existing methods fail to efficiently prioritize and combine supported bands for optimal connectivity.
Innovation Solution
The user device generates a list of supported band combinations by prioritizing MR-DC band combinations, followed by NR and E-UTRA band combinations, and transmits this information to the base station, ensuring that the band combinations are ordered to facilitate seamless dual connectivity across multiple RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the user device notifies all possible band combinations without prioritization, then the completeness of capability information is improved, but the complexity of processing and determining the appropriate band combination increases
Solution Approach 1:
The user device performs preliminary sorting of band combinations based on priority criteria before notification. The control unit sorts band combinations in descending order of priority, considering factors such as MR-DC band combinations (highest priority), NR band combinations, and E-UTRA band combinations (lowest priority). This preliminary organization reduces the processing burden on both the user device and base station when determining the appropriate band combination to use.
2Adaptability or versatility
If the system supports multiple RATs (E-UTRA, NR, MR-DC) with different band combinations, then the adaptability of the communication system is improved, but the difficulty of determining and switching between band combinations increases
Solution Approach 1:
The patent segments band combinations into distinct priority categories based on the radio access technology type. Band combinations are divided into: (1) MR-DC band combinations (highest priority), (2) NR band combinations (medium priority), and (3) E-UTRA band combinations (lowest priority). This segmentation allows the user device and base station to systematically evaluate and select appropriate band combinations by checking priorities in order, reducing the complexity of multi-RAT band combination management.
3Adaptability or versatility
If the user device switches processing between different RAT band combinations dynamically, then the flexibility of the communication system is improved, but the processing time and complexity increase
Solution Approach 1:
The user device performs preliminary sorting and prioritization of band combinations before actual communication occurs. The control unit organizes all possible band combinations in descending order of priority (MR-DC > NR > E-UTRA) and stores this sorted list. When switching between RATs, the device and base station can quickly determine the appropriate band combination by referencing this pre-sorted list, significantly reducing the time required for band combination switching during dynamic RAT changes.
Data Source
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AI summary
A user device includes a receiving unit configured to receive first information and second information from a base station device, the first information indicating one or more bands that are candidates for a band combination to be supported, the second information indicating which RAT (Radio Access Technology) is to be used; a control unit configured to determine, based on the second information, the band combination to be supported from among the one or more bands included in the first information; and a transmitting unit configured to transmit, to the base station device, terminal capability information including the determined band combination.