Wireless SDT Resource Switching in RRC_INACTIVE State
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Solution Overview
Problem
Existing methods for small data transmission (SDT) in the RRC_INACTIVE state do not effectively ensure data transmission while minimizing resource waste in terminal devices.
Innovation Solution
Implementing a first timer for dedicated resources and a second timer for shared resources to limit the duration of SDT, allowing terminal devices to use dedicated resources for part of the time and shared resources at other times, thereby ensuring data transmission while reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices use dedicated transmission resources for SDT, then data transmission is ensured, but resource waste increases
Solution Approach 1:
The patent implements dynamic resource allocation by introducing two timers (first timer for dedicated resources, second timer for shared resources) that control the switching between dedicated and shared transmission resources. The terminal device dynamically selects which resource pool to use based on timer expiration status, transforming the static resource allocation into a dynamic adaptive mechanism that resolves the contradiction between ensuring transmission reliability and reducing resource waste.
Solution Approach 2:
The patent changes the temporal parameter of resource usage by configuring different timer durations (first timer duration shorter than second timer duration). This parameter change allows the system to switch between dedicated and shared resources over time, enabling the terminal to ensure data transmission during critical periods while reducing resource waste during extended periods.
2Loss of information
If terminal devices perform SDT in RRC_INACTIVE state, then signaling overhead is reduced, but resource allocation clarity deteriorates
Solution Approach 1:
The patent segments the resource allocation mechanism into two distinct timer-based control systems: a first timer for dedicated resources and a second timer for shared resources. This segmentation provides clear, separate control mechanisms for different resource types, improving resource allocation clarity while maintaining the SDT capability in RRC_INACTIVE state that reduces signaling overhead.
3Adaptability or versatility
If first timer duration is set shorter than second timer duration, then shared resource availability increases, but dedicated resource control decreases
Solution Approach 1:
The patent implements periodic action through the timer mechanism where the first timer (shorter duration) and second timer (longer duration) create periodic windows for dedicated and shared resource usage. This periodic structure allows the system to alternately access dedicated resources with tighter control and shared resources with greater availability, balancing both requirements through time-based periodic operation.
Data Source
AI summary
A method and a device for wireless communication are provided. The method includes: a terminal device receiving first information sent by a network device, where the first information indicates a second timer; in response to, at least in part, a measurement result of downlink reference signal receiving power (RSRP) being greater than a pre-configured RSRP threshold, the terminal device sending a first request to the network device, wherein the first request comprises a request for a SDT transmission resource; and the terminal device receiving second information sent by the network device, wherein the second information indicates the SDT transmission resource.