RRC Release Handling After Small Data Transmission Completion
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing Radio Resource Control (RRC) state transitions after small data transmissions, leading to suboptimal resource allocation and increased latency.
Innovation Solution
Implementing a mechanism to manage RRC state transitions by utilizing specific criteria-based protocols that selectively apply RRC release procedures after small data transmissions, optimizing resource allocation and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC connection is maintained after small data transmission, then connection reliability is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements dynamic RRC state management by introducing a suspended state between connected and idle states. The network can flexibly transition UE between states based on data arrival patterns, enabling adaptive resource allocation that improves both connection reliability and resource efficiency
Solution Approach 2:
The patent changes the RRC state parameter from binary (connected/idle) to ternary (connected/suspended/idle), allowing the system to optimize resource allocation by selecting appropriate states based on traffic conditions while maintaining connection reliability when needed
2Productivity
If RRC connection is released after small data transmission, then resource allocation efficiency is improved, but latency increases
Solution Approach 1:
The patent performs preliminary actions by establishing RRC connection and configuring suspension parameters before data transmission completes. This allows rapid resumption of data transfer when new data arrives, reducing latency while maintaining resource efficiency
Solution Approach 2:
The suspended state provides dynamic flexibility, allowing the system to quickly react to incoming data by resuming the connection without full re-establishment, thereby reducing latency while maintaining efficient resource allocation
3Loss of time
If RRC connection is maintained for frequent small data transmissions, then latency is reduced, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements periodic evaluation of data arrival patterns to determine whether to maintain suspended or connected state. This periodic assessment allows the system to optimize resource allocation based on actual traffic patterns while maintaining low latency when needed
Solution Approach 2:
The system dynamically adjusts RRC state based on observed traffic patterns, transitioning between suspended and connected states to optimize the trade-off between latency and resource efficiency for frequent small data transmissions
Data Source
AI summary
A wireless device receives a radio resource control (RRC) message comprising configuration parameters for uplink resources associated with a small data transmission (SDT) procedure of the wireless device. The wireless device transmits, to a base station central unit (BS-CU) via the uplink resources of a base station distributed unit (BS-DU), an RRC resume request message for the SDT procedure, and uplink data associated with the SDT procedure. The wireless device receives, from the BS-CU to via the BS-DU, an RRC release message after the BS-CU receives a message indicating inactivity notification and completion of the SDT procedure.