Multi-Radio Dual Connectivity Uplink Path Switching
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Solution Overview
Problem
In mobile communication systems, User Equipment (UE) supporting Multi-Radio Dual Connectivity (MR-DC) faces significant uplink data throughput issues when the primary transmission path becomes inapplicable due to failures or high transmission delays, leading to suspended or impacted uplink transmissions.
Innovation Solution
The UE is configured to switch from the primary path to the secondary path for uplink transmissions when the primary path is inapplicable, determined by detecting failures, reestablishment events, or excessive transmission delays, and to dynamically manage data distribution between both paths based on predetermined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE always sends uplink data on the primary path as indicated by the network, then the network control is simplified, but the uplink data throughput is significantly affected when the primary path becomes inapplicable
Solution Approach 1:
The patent implements dynamic path selection by enabling the UE to automatically switch between primary and secondary paths based on real-time path availability and performance conditions. The UE monitors path status and dynamically adjusts the transmission path without requiring complex network-side control logic, thus maintaining simple network control while improving throughput resilience.
Solution Approach 2:
The patent enables the UE to autonomously determine path inapplicability conditions and self-manage the switching between primary and secondary paths. The UE independently monitors transmission delays, detects failures, and performs path switching without continuous network intervention, thereby maintaining simple network control while ensuring continuous uplink data transmission.
2Reliability
If the UE switches to the secondary path when the primary path is inapplicable, then the uplink data transmission continuity is improved, but the path selection complexity increases
Solution Approach 1:
The patent configures the secondary path in advance as a standby transmission path before any failure occurs. The UE is pre-configured with both primary and secondary paths, allowing immediate switching when the primary path becomes inapplicable, thus ensuring transmission continuity without complex real-time decision-making.
Solution Approach 2:
The patent implements a feedback mechanism where the UE monitors path status including transmission delays and failure conditions. Based on this feedback, the UE automatically triggers path switching when predefined thresholds are exceeded, simplifying the complexity by using clear threshold-based decision rules rather than complex algorithms.
3Adaptability or versatility
If the network indicates an uplink split threshold to control data distribution, then the data distribution control is centralized, but the UE cannot adapt when the primary path becomes inapplicable
Solution Approach 1:
The patent implements dynamic path selection by enabling the UE to automatically switch between primary and secondary paths based on real-time path availability and performance conditions. The UE monitors path status and dynamically adjusts the transmission path without requiring complex network-side control logic, thus maintaining simple network control while improving throughput resilience.
Data Source
AI summary
A method executed by a User Equipment (UE) supporting Multi-Radio Dual Connectivity (MR-DC) with a first cell group and a second cell group in a mobile communication system is provided. The UE configures a primary path to the first cell group and a secondary path to the second cell group for uplink transmissions in an MR-DC operation. The UE determines whether the primary path is inapplicable when performing the uplink transmissions on the primary path. The UE switches from the primary path to the secondary path to continue the uplink transmissions in response to the primary path being inapplicable.