Small Data Transmission Timer Restart in RRC Inactive State
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing small data transmissions, particularly in scenarios where immediate re-establishment of a connection is not necessary, leading to unnecessary resource consumption and latency.
Innovation Solution
Implementing a mechanism to restart the Small Data Transmission (SDT) timer in specific conditions to optimize resource usage and reduce latency by allowing subsequent data transmissions without full connection re-establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the SDT timer is not restarted after data transmission, then connection re-establishment procedures are triggered, but this causes unnecessary latency and resource consumption
Solution Approach 1:
The patent implements dynamic timer management by selectively restarting the SDT timer based on whether data transmission occurs. The timer behavior changes from static to adaptive, extending the small data transmission window when needed and allowing connection release when the window expires without transmission, thereby reducing unnecessary latency while maintaining reliable connection management.
Solution Approach 2:
The patent modifies the timer parameter state by restarting it upon detecting data transmission. This parameter change extends the SDT window duration dynamically, preventing premature connection release and reducing latency for subsequent transmissions while maintaining proper connection management through conditional timer updates.
2Loss of energy
If full connection re-establishment is performed for each data transmission, then connection reliability is maintained, but resource consumption increases
Solution Approach 1:
The patent creates a dynamic connection management system where the RRC inactive state is extended through conditional SDT timer restarts. This allows the system to maintain reliable connections for multiple transmissions without repeatedly performing full re-establishment procedures, thereby reducing resource consumption while preserving connection reliability through adaptive state management.
Solution Approach 2:
The patent enables continuous small data transmissions within an extended SDT window by restarting the timer upon detecting transmissions. This continuity mechanism allows multiple data packets to be sent without breaking the RRC inactive state, reducing the frequency of connection re-establishment operations and minimizing resource consumption while maintaining reliable data delivery.
3Productivity
If the SDT window is extended by restarting the timer, then subsequent transmissions can occur without re-establishment, but this increases device complexity
Solution Approach 1:
The patent implements a relatively simple parameter change mechanism that monitors data transmission events and conditionally restarts the SDT timer. This approach extends the SDT window to improve data transmission efficiency while maintaining manageable device complexity through straightforward timer state updates based on transmission detection, avoiding overly complex timer management structures.
Data Source
AI summary
A wireless device, based on initiating an SDT procedure to transmit or receive SDT data in a radio resource control (RRC) inactive state, transmits, to a base station, a first RRC message, and starts an SDT timer for transitioning the wireless device to a RRC idle state. The wireless device receives, from the base station and during the SDT procedure, a parameter indicating to restart the SDT timer.