Inactive-State Small Data Transmission With Reduced Signaling Overhead
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Solution Overview
Problem
Existing wireless communication technologies do not allow for efficient small data transmissions when user equipment is in an inactive state, leading to increased signaling overhead and power consumption.
Innovation Solution
Implementing small data transmission (SDT) methods that enable data transfer in an inactive state by configuring SDT parameters, selecting appropriate RA resources, and using RACH or CG schemes, with indications via RRC, MAC CE, or DCI messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment transitions to connected state for data transmission, then data transmission reliability is improved, but power consumption and signaling overhead increase
Solution Approach 1:
The patent segments data transmission into two categories: small data transmissions that can occur in inactive state and large data transmissions that require connected state. This segmentation allows the system to maintain reliability for critical data while enabling power savings for small data packets by avoiding full connection establishment.
Solution Approach 2:
The patent implements partial action by allowing limited data transmission capabilities in the inactive state without requiring full connection establishment. The system provides sufficient functionality for small data packets while avoiding the excessive action of fully transitioning to connected state, thus reducing power consumption and signaling overhead.
2Reliability
If user equipment transitions to connected state for data transmission, then data transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments transmission procedures into inactive-state small data transmission and connected-state data transmission. This segmentation reduces signaling overhead by avoiding full connection establishment procedures for small data packets, while maintaining reliability through the simplified inactive-state transmission mechanism.
Solution Approach 2:
The patent extracts the essential data transmission functionality from the full connected state procedure, allowing it to operate independently in the inactive state. This extraction removes unnecessary signaling overhead while preserving the core data transmission capability for small packets.
3Use of energy by moving object
If small data transmission is enabled in inactive state, then power consumption is reduced, but transmission reliability may be compromised
Solution Approach 1:
The patent changes operational parameters by enabling data transmission in the inactive state with modified transmission characteristics. These parameter changes allow small data packets to be transmitted with reduced power consumption while maintaining acceptable reliability through optimized transmission parameters specific to the inactive state.
4Reliability
If traditional connection resume procedure is used for small data, then transmission reliability is ensured, but time consumption increases
Solution Approach 1:
The patent applies partial action by implementing a simplified transmission procedure for small data packets that does not require full connection resume. This partial procedure maintains sufficient reliability for small data while significantly reducing the time consumption associated with complete connection establishment and resumption.
Data Source
AI summary
Method, systems and devices for small data transmissions can occur with user equipment even when the user equipment is in an inactive state. Small data transmissions while in an inactive state can save power and reduce signaling overhead. The small data transmissions may be prepared with small data transmission parameters. A small data transmission indication is included in a reply to user equipment that requests small data transmission communication.