RRC Inactive Small Data Transmission Using Mobility-Based Procedure Selection
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Solution Overview
Problem
In the New Radio (NR) RRC_INACTIVE state, small and infrequent data transmissions require resuming the connection to RRC_CONNECTED state for each data packet, leading to unnecessary power consumption and signaling overhead.
Innovation Solution
Enabling small data transmission (SDT) in the RRC_INACTIVE state through RACH-based schemes, allowing UL data transmission on pre-configured resources and considering UE mobility to determine whether to initiate SDT or regular connection establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If small data is transmitted using existing procedures, then data can be sent, but unnecessary PDCCH monitoring and processing overhead occur causing waste of battery power and network resources
Solution Approach 1:
The patent extracts and removes unnecessary PDCCH monitoring and processing operations from the small data transmission procedure. By identifying that small data transmissions do not require full scheduling procedures, the invention eliminates these redundant steps, directly reducing battery power consumption and processing overhead while maintaining successful data transmission.
Solution Approach 2:
The patent applies partial action by implementing a simplified transmission procedure that performs only the necessary steps for small data transmission. Instead of executing complete scheduling procedures (excessive action), the system performs a subset of operations tailored specifically to small data requirements, reducing resource waste while achieving the transmission objective.
2Productivity
If small data transmission procedures are simplified to reduce overhead, then battery power is saved, but reliable data transmission may be compromised
Solution Approach 1:
The patent applies local quality by tailoring the transmission procedure specifically to small data characteristics. Instead of using a one-size-fits-all approach, the invention implements localized optimizations for small data packets, applying simplified procedures only where appropriate while maintaining reliability through targeted adjustments to resource allocation and acknowledgment mechanisms.
Solution Approach 2:
The patent changes key transmission parameters such as resource allocation size, PDCCH monitoring frequency, and acknowledgment timing to optimize for small data. By adjusting these parameters rather than fundamentally changing the protocol, the system maintains reliability while improving transmission efficiency and reducing overhead for small data packets.
Data Source
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AI summary
Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for configuration of small data transmission. In example embodiments, a metric of mobility is determined in an inactive state. Based on the metric of mobility, one of a small data transmission procedure and a connection establishment procedure is selected for data transmission. Further, the selected one of the small data transmission procedure and the connection establishment procedure is initiated for the data transmission.