NE-DC UE Capability Coordination for SCG Band Combination Selection
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Solution Overview
Problem
Current inter-node messages for MR-DC cannot coordinate on band combinations reported in the supportedBandCombinationListNEDC-Only field, limiting network configuration options and reducing the chances of finding suitable SCG configurations in NE-DC scenarios, leading to potential SCG configuration failures.
Innovation Solution
Mechanisms are proposed for capability coordination in NE-DC by using an Offset index for multiple band combination lists and Multiple band combination restriction lists to allow MN and SN to coordinate on capabilities reported in more than one band combination list, enabling more flexible SCG configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If current inter-node messages for MR-DC are used, then coordination on band combinations is simplified, but network configuration options are limited and SCG configuration success rate decreases
Solution Approach 1:
The patent segments the band combination information into two separate lists: supportedBandCombinationList (for EN-DC and NR-DC) and supportedBandCombinationListNEDC-Only (for NE-DC). This segmentation allows the system to maintain separate coordination mechanisms for different dual connectivity types, enabling comprehensive coordination for NE-DC without affecting existing EN-DC and NR-DC operations, thereby increasing SCG configuration success rate while managing complexity through structured division
Solution Approach 2:
The patent introduces a new dimension to the coordination mechanism by adding support for a second band combination list (supportedBandCombinationListNEDC-Only) alongside the existing first list (supportedBandCombinationList). This dimensional expansion allows the system to coordinate NE-DC specific band combinations independently, providing additional configuration options and improving reliability without overwhelming the base coordination structure
2Adaptability or versatility
If multiple band combination lists are supported, then network configuration options increase, but message structure and processing complexity increase
Solution Approach 1:
The patent divides band combination information into distinct segmented lists (first list for EN-DC/NR-DC, second list for NE-DC only), allowing each list to be processed and coordinated independently. This segmentation enables the system to handle multiple band combination lists without creating a monolithic complex structure, as each list can be managed through dedicated coordination procedures
Solution Approach 2:
The patent establishes predetermined coordination rules and procedures for handling multiple band combination lists before actual configuration occurs. By defining the structure and coordination logic in advance (preliminarily), the system reduces processing complexity during runtime, as the message structure and coordination steps are already standardized and expected
Data Source
AI summary
Embodiments described herein relate to methods and apparatuses for signalling band combinations allowed to be used by a second base station. A method performed by a first base station, wherein the first base station is acting as a Master Node in Dual Connectivity, wherein there exists a first band combination list and a second band combination list, and wherein the first band combination list and the second band combination list each contain supported band combinations, comprises: signalling to a second base station to indicate band combinations allowed to be used by the second base station, wherein the second base station is acting as a Secondary Node in Dual Connectivity, wherein the indicated band combinations comprise band combinations from the first band combination list and/or the second band combination list.