NR-LTE X2 Interface Data Transmission Control
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Solution Overview
Problem
Current technologies face challenges in efficiently transmitting and receiving data between heterogeneous radio access network base stations, such as NR and LTE, in 5G non-standalone networks, requiring effective interworking protocols and interfaces to manage data separation and aggregation across different radio access technologies.
Innovation Solution
The implementation of an X2 interface for interworking between NR and LTE base stations, enabling the transmission of downlink data and data transfer status information, including retransmission indicators, through a standardized message format to facilitate seamless data communication and mobility management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations employing different radio access technologies (NR and LTE) are used together to provide communication services, then the ability to process large amounts of data at high speed is improved, but the complexity of defining protocols and setting forth data separation/aggregation procedures between base stations increases
Solution Approach 1:
The patent segments data transmission by defining separate procedures for data separation and aggregation between NR and LTE base stations. The X2 interface is configured to handle specific data types and retransmission scenarios separately, dividing the complex interworking task into manageable protocol components that address specific functional requirements.
Solution Approach 2:
The patent introduces an intermediary mechanism through the X2 interface configuration that mediates data exchange between heterogeneous base stations. The interface defines standardized message formats and procedures that act as an intermediary layer, simplifying the interaction between NR and LTE systems by providing a predefined communication framework.
2Ease of manufacture
If data is transmitted between heterogeneous base stations without a standardized interface, then implementation flexibility is maintained, but data transmission efficiency and reliability deteriorate due to lack of coordinated retransmission procedures
Solution Approach 1:
The patent creates a universal X2 interface configuration that can handle multiple functions including data separation, aggregation, and retransmission coordination between different base station types. This multi-functional interface maintains implementation flexibility while ensuring reliable data transmission through standardized procedures that work across heterogeneous systems.
Solution Approach 2:
The patent utilizes parameter changes in the X2 interface configuration to adapt to different transmission scenarios. By modifying message formats and procedure parameters based on the specific data transmission context (separation vs. aggregation, retransmission vs. initial transmission), the system maintains flexibility while ensuring reliable delivery through context-appropriate protocol parameters.
Data Source
AI summary
Provided are technologies for data transmission and reception using an interworking interface between heterogeneous radio access network base stations, such as between NR and LTE, for a 5G non-standalone (NSA) network. A base station for controlling downlink data transmission may include a controller configured to setting up an X2 interface for transmitting the downlink data to a UE by interworking with another base station, a transmitter configured to transmit downlink use data information including information indicating whether to perform retransmission of an associated downlink data packet to another base station through the X2 interface, and a receiver configured to receive downlink data transfer status information from another base station through the X2 interface.