Small Data Transmission With CG-to-DG Switching After TAT Expiry
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Solution Overview
Problem
There is a need to enhance small data transmission (SDT) procedures in next-generation wireless communication systems, particularly in 6G communication systems, to support higher data rates and improve network efficiency.
Innovation Solution
A method and system are introduced for 6G and 5G communication systems that involve configuring a configured grant (CG) resource and a timing alignment timer (TAT) for SDT, allowing dynamic grant (DG) usage upon response receipt during SDT, and releasing the CG resource upon TAT expiry, thereby enhancing SDT procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grant (CG) resources are allocated for small data transmission (SDT) in RRC inactive state, then SDT capability is enabled, but resource waste occurs when timing alignment timer (TAT) expires during ongoing SDT procedure
Solution Approach 1:
The patent implements dynamic switching between CG-based SDT and DG-based SDT modes based on TAT status. When TAT expires during ongoing SDT procedure, the system dynamically transitions from CG resource allocation to DG resource allocation, allowing flexible adaptation to changing timing alignment conditions while maintaining SDT capability.
Solution Approach 2:
The patent changes the resource allocation parameter from static CG configuration to dynamic DG allocation based on TAT expiry condition. This parameter change enables the system to respond to timing alignment status changes, preventing resource waste while maintaining SDT functionality.
2Loss of energy
If CG resources are released upon TAT expiry, then resource utilization is improved, but ongoing SDT procedure must be terminated
Solution Approach 1:
The patent introduces DG resources as an intermediary mechanism when CG resources are released due to TAT expiry. Instead of terminating the SDT procedure, the system transitions to using DG resources which are dynamically allocated, allowing the SDT procedure to continue without interruption while improving resource utilization.
Solution Approach 2:
The patent prepares DG resource allocation as a preliminary backup mechanism before CG resource release. When TAT expiry is detected, the system has already established the capability to switch to DG-based SDT, ensuring seamless continuation of the SDT procedure without termination.
3Adaptability or versatility
If dynamic grant (DG) is used for SDT after TAT expiry, then resource allocation flexibility is improved, but system complexity increases
Solution Approach 1:
The patent segments the SDT procedure into two distinct phases: CG-based SDT phase (when TAT is valid) and DG-based SDT phase (when TAT expires). This segmentation allows the system to use simpler CG mechanisms during the initial phase and only activate the more complex DG mechanisms when necessary, reducing overall system complexity while maintaining flexibility.
Data Source
AI summary
The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The present disclosure provides method and apparatus for SDT related procedures in next generation wireless communication system.