Split Bearer Configuration for LTE-5G Dual Connectivity
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Solution Overview
Problem
During the evolution to 5G wireless communication systems, there is a need to prevent User Equipment (UE) from accessing or handing over to a 5G base station, establish a horizontal interface between LTE and 5G base stations, ensure a 5G base station can serve as a secondary base station, and set up a split bearer on the secondary base station to support data transmission effectively.
Innovation Solution
The method involves preventing UE access to 5G base stations by broadcasting indication messages, establishing a horizontal interface using Automatic Neighbor Relation (ANR) and dual connectivity, and configuring a Secondary Cell Group (SCG) split bearer to enable 5G base stations to operate as secondary base stations, sharing data transmission with LTE base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE is allowed to access or handover to 5G base station, then 5G data transmission capability is utilized, but network control and coordination becomes complex
Solution Approach 1:
The patent segments the base station functionality into primary base station (controlling UE access and coordination) and secondary base station (providing additional data transmission resources). This segmentation allows 5G data transmission capability to be utilized while maintaining centralized control at the primary base station, thus avoiding increased network control complexity.
2Productivity
If 5G base station serves as secondary base station with split bearer, then data transmission efficiency is improved, but interface establishment and configuration becomes complex
Solution Approach 1:
The patent establishes the horizontal interface and split bearer configuration in advance through preliminary actions. The primary base station pre-configures the secondary base station with necessary parameters and establishes the interface before actual data transmission begins. This preliminary setup simplifies subsequent operations and reduces real-time configuration complexity.
3Adaptability or versatility
If horizontal interface is established between LTE and 5G base stations, then network evolution and flexibility are improved, but system complexity increases
Solution Approach 1:
The patent implements a universal horizontal interface that can work with both LTE and 5G base stations. The interface design allows the same mechanism to support multiple network types and evolution scenarios, providing flexibility and adaptability without requiring separate complex interfaces for each network type, thus controlling system complexity.
Data Source
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long term evolution (LTE). The method for operating a primary base station in a wireless communication system is provided. The method includes transmitting, to a secondary base station, an addition request message, wherein the addition request message carries information of a secondary cell group (SCG) split bearer; and receiving, from the secondary base station, a response message of the addition request message.