Inactive-State SDT Resource Timing for Reliable Wireless Uplink
Find Innovative SolutionsGenerate Solutions
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, leading to increased power consumption and signaling overhead.
Innovation Solution
Implementing a first timer for dedicated resources and a second timer for shared resources to manage SDT, allowing the terminal device to use dedicated resources for a limited duration and shared resources when necessary, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If terminal device performs SDT in RRC_INACTIVE state, then signaling overhead is reduced, but data transmission reliability deteriorates due to lack of clear resource management
Solution Approach 1:
The patent introduces timer parameters (first timer and second timer) to dynamically control the validity period of dedicated resources. By changing the temporal parameter of resource allocation, the system achieves reliable data transmission while maintaining the RRC_INACTIVE state benefits. The timer mechanism ensures resources are properly managed and released, preventing resource waste while guaranteeing transmission reliability.
Solution Approach 2:
The terminal device autonomously manages its own resource usage by monitoring timer expiration and switching between dedicated and shared resources without network intervention. This self-service approach maintains reliable transmission while minimizing signaling overhead, as the device independently handles resource allocation decisions based on timer status.
2Reliability
If dedicated resources are allocated for SDT, then data transmission is ensured, but resource waste increases due to continuous allocation
Solution Approach 1:
The patent implements periodic resource allocation through timer-based validity periods. Dedicated resources are allocated only for specific time intervals defined by the first and second timers, rather than continuously. This periodic approach ensures data transmission during active periods while automatically releasing resources to prevent waste during inactive periods.
Solution Approach 2:
The resource allocation transitions from static continuous allocation to dynamic time-limited allocation. The system adaptively switches between dedicated resources (when timers are valid) and shared resources (when timers expire), optimizing the balance between transmission reliability and resource utilization based on actual transmission needs.
3Reliability
If dedicated resources are used for SDT, then data transmission reliability improves, but device complexity increases due to resource management overhead
Solution Approach 1:
The patent extracts the resource management complexity from the network side and places it on the terminal device through local timer monitoring. By taking out the active management function from the network, the system reduces network signaling overhead and device complexity, while maintaining reliability through simple local timer-based resource switching between dedicated and shared pools.
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.