User Equipment Capability Signaling for LTE-NR Dual Connectivity
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Solution Overview
Problem
The LTE and NR systems in dual connectivity face challenges due to independent radio resource control processes, leading to a lack of understanding of UE category or RRC configuration between the two systems, which hinders effective capability information transmission and simultaneous communication.
Innovation Solution
A user equipment and base station configuration that supports simultaneous communication with both LTE and NR systems by defining capability information specific to LTE-NR dual connectivity, allowing each system to recognize and configure communication without needing to understand the other system's capability information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent radio resource control processes are used in LTE and NR systems, then each system can operate autonomously, but the systems cannot understand each other's capability information or RRC configuration
Solution Approach 1:
The patent introduces a base station as an intermediary that translates and coordinates capability information between LTE and NR systems. The base station receives capability information from the terminal, determines appropriate RRC configurations, and manages the dual connectivity setup, thereby enabling information exchange between the two independent radio resource control processes without requiring them to directly understand each other's configurations.
2Productivity
If capability information is transmitted between LTE and NR systems, then simultaneous communication can be achieved, but the complexity of capability information transmission and configuration increases
Solution Approach 1:
The patent extracts the complex capability information transmission and configuration management functions from the terminal and concentrates them in the base station. The terminal only needs to transmit its capability information to the base station, while the base station handles the complex tasks of determining RRC configurations, managing dual connectivity parameters, and coordinating between LTE and NR systems, thereby reducing terminal complexity.
Solution Approach 2:
The base station is designed to perform multiple functions: it acts as both an LTE base station and an NR base station, manages capability information reception, determines RRC configurations for both systems, and coordinates dual connectivity. This multi-functional approach consolidates complexity in a single entity that can handle both radio access technologies simultaneously.
3Adaptability or versatility
If the LTE system and NR system use different UE categories and RRC configurations, then each system can be optimized independently, but the terminal cannot achieve seamless dual connectivity
Solution Approach 1:
The base station serves as a mediator that receives capability information from the terminal, determines appropriate RRC configurations for both LTE and NR systems, and coordinates the dual connectivity setup. This intermediary approach allows the terminal to maintain independent optimized configurations for each system while the base station ensures seamless integration and coordination between them.
Data Source
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AI summary
Provided is a technique for achieving simultaneous communication with a plurality of wireless communication systems using different radio access techniques. An aspect of the invention relates to a user equipment that supports simultaneous communication with a first wireless communication system and a second wireless communication system using different radio access techniques. The user equipment includes a transmitting and receiving unit that transmits and receives radio signals to and from a first base station in the first wireless communication system and a second base station in the second wireless communication system and a capability information notification unit that transmits, to the first base station or the second base station, capability information related to the simultaneous communication with the first wireless communication system and the second wireless communication system.