Dual-Connectivity Uplink Split Bearer Threshold Control
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Solution Overview
Problem
In dual connectivity (DC) scenarios, the operations of Semi-Persistent Scheduling (SPS) for uplink split bearers are not clearly defined when the amount of uplink data is smaller than or equal to a Buffer Status Report (BSR) threshold, leading to unstable communication operations between base stations and communication terminals.
Innovation Solution
A communication system where a communication terminal device transmits data to a first base station device when the data amount exceeds a threshold, and to the first base station alone when the data is below the threshold, with the threshold adjusted based on periodic radio resource allocation by a second base station, ensuring stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the communication terminal device transmits data only to the first base station when data amount is below threshold, then transmission simplicity is improved, but communication stability deteriorates due to undefined SPS operations
Solution Approach 1:
The patent changes the threshold parameter dynamically based on the data amount. When data amount exceeds the threshold, the terminal transmits to both first and second base stations; when below threshold, it transmits only to the first base station. This parameter-based decision mechanism resolves the contradiction by adapting the transmission behavior to data conditions, ensuring stability while maintaining simplicity.
2Reliability
If the threshold is adjusted to maintain periodic radio resource allocation, then communication stability is improved, but system complexity increases
Solution Approach 1:
The patent introduces dynamic threshold adjustment based on periodic radio resource allocation patterns. The threshold is adapted according to the allocation period and data characteristics, allowing the system to maintain stability through dynamic parameter optimization rather than fixed complex rules.
Solution Approach 2:
The patent performs preliminary determination of the threshold based on expected data amounts and periodic allocation patterns before actual transmission occurs. This advance preparation simplifies the real-time decision-making process while maintaining communication stability.
3Reliability
If data is transmitted to both base stations when threshold is exceeded, then communication reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the data transmission decision into two distinct paths based on the threshold: below-threshold transmission to first base station only, and above-threshold transmission to both base stations. This segmentation simplifies resource allocation by creating clear, manageable transmission scenarios rather than continuous complex decisions.
Data Source
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AI summary
A user equipment (202), UE, is adapted to receive different beams from a base station (203), BS. in view of a beam switching, The BS transmits to the UE the configuration that the UE should adopt for for carrying out measurements on the beams. Optionally, the BS sends also to the UE the configuration that the UE should adopt for reporting back the measurements to the BS.