Master Base Station Radio Link Failure Control in Dual Connectivity
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Solution Overview
Problem
In dual connectivity schemes, existing communication systems face challenges in managing radio link failures between user terminals and secondary base stations, leading to potential data loss and inefficiencies in resource allocation.
Innovation Solution
A communication control method that involves detecting radio link failures by user terminals, reporting these failures to the master base station, and transmitting stop instruction signals to secondary base stations, which temporarily halt downlink data transmission and initiate timers for data retention, before resuming when the link is recovered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary base station continues transmission without stop instruction, then data transmission efficiency is maintained, but data loss occurs during radio link failure
Solution Approach 1:
The system implements a feedback mechanism where the user terminal reports radio link failure status to the master base station, which then sends stop instruction signals to the secondary base station. This feedback loop ensures that data transmission is reliably stopped when radio link failure is detected, preventing data loss while optimizing resource allocation by stopping transmission only when necessary.
2Reliability
If stop instruction signal is transmitted immediately, then data loss is prevented, but transmission recovery is delayed
Solution Approach 1:
The system initiates preliminary actions by having the user terminal detect and report radio link failure status, and the master base station prepare stop instruction signals before actual data loss occurs. When the link is restored, the secondary base station can resume transmission quickly because it already has the stop instruction mechanism in place and can immediately switch back to normal operation without delay.
3Productivity
If dual connectivity is implemented, then throughput is improved, but complexity of radio link failure management increases
Solution Approach 1:
The master base station acts as an intermediary between the user terminal and the secondary base station for managing radio link failures. Instead of the secondary base station independently managing its own link failures, the master base station receives failure reports from the user terminal and sends standardized stop instruction signals to the secondary base station, simplifying the overall management complexity while maintaining the throughput benefits of dual connectivity.
Data Source
AI summary
A communication control method according to one embodiment includes controlling a dual connectivity communication using a master base station configured to establish an RRC connection with a user terminal and a secondary base station configured to provide additional radio resources to the user terminal. The controlling includes the steps of: detecting, by the user terminal, a radio link failure between the user terminal and the secondary base station; reporting, by the user terminal, the radio link failure to the master base station; and transmitting, by the master base station, a stop instruction signal to the secondary base station.