TTI Bundling Mode Switching During Silent Periods
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE networks, switching between TTI bundling enabled and disabled modes for delay-sensitive data transmission introduces significant delays and reduces system performance, especially when performed during active voice communication, leading to reduced voice quality and increased resource usage.
Innovation Solution
A method and apparatus that allow switching between TTI bundling modes only during silent periods, utilizing silent mode detection to minimize delays and optimize resource allocation by enabling TTI bundling only for users needing enhanced transmit power, thereby reducing overhead and maintaining voice quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TTI bundling mode switching is performed during active voice communication, then system adaptability is improved, but voice quality deteriorates and packet delay increases
Solution Approach 1:
The system performs TTI bundling mode switching during silent periods before voice activity resumes, rather than during active communication. This preliminary action during idle periods allows mode adaptation without impacting voice quality or causing packet delay, as the switching occurs when no voice packets are being transmitted.
2Adaptability or versatility
If TTI bundling mode switching is performed during active transmission, then system adaptability is improved, but packet delay increases
Solution Approach 1:
The switching operation is performed in advance during silent periods when no voice packets are pending or being transmitted. This eliminates the switching delay from the voice packet transmission timeline, as the mode change is already complete when voice activity resumes.
3Reliability
If TTI bundling is used for all users, then transmission reliability is improved, but system capacity decreases
Solution Approach 1:
TTI bundling is applied selectively only to users who require it (those with poor channel conditions) rather than uniformly to all users. The system dynamically identifies which users need TTI bundling and applies the mode switching only to them during silent periods, maintaining high reliability for needy users while preserving system capacity by avoiding unnecessary overhead for users with good channel conditions.
Data Source
AI summary
This disclosure deals with an apparatus in a base station for controlling transmission of delay-sensitive data from a transmitter over a transmission link in a packet data communication network, which transmitter is capable of changing between a TTI bundling enabled mode and a TTI bundling disabled mode. The apparatus comprises: a receiver for receiving data from the transmitter over the transmission link; a decision unit for deciding that the transmitter should change TTI bundling mode; a silent mode detection unit for detecting that the transmitter is in the silent mode; and a triggering unit for triggering change of TTI bundling mode in response to deciding that the transmitter should change TTI bundling mode and in response to detecting that the transmitter is in the silent mode. The disclosure further relates to a corresponding method.