RRC Inactive Data Transfer Using a Second Resume Procedure
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Solution Overview
Problem
The inefficiency of data transfer in the RRC_INACTIVE state of 5G communication systems, particularly due to excessive overhead during state transitions to RRC_CONNECTED, reduces network efficiency.
Innovation Solution
A method and apparatus for data transfer in RRC_INACTIVE state, utilizing a first and second resume procedure, where the first resume procedure resumes the RRC connection and the second resume procedure allows data transmission and reception without transitioning to RRC_CONNECTED, by employing predefined and system information-based information for buffer status reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If state transition from RRC_INACTIVE to RRC_CONNECTED is performed for data transfer, then data transmission capability is restored, but excessive overhead is generated and network efficiency is reduced
Solution Approach 1:
The resume procedure is segmented into two independent parts: first resume procedure for RRC connection resumption and second resume procedure for data transfer. This segmentation allows data transmission to occur without full RRC connection resumption, reducing overhead while maintaining data transmission capability.
Solution Approach 2:
A second resume procedure is introduced as an intermediary mechanism between RRC_INACTIVE state and data transfer. This intermediary allows data transmission without requiring full transition to RRC_CONNECTED state, thereby reducing the overhead associated with complete state transition.
2Productivity
If RRC connection is resumed for data transfer, then data transmission is enabled, but unnecessary state transitions occur reducing network efficiency
Solution Approach 1:
The resume procedure is divided into two independent procedures: first resume procedure for RRC connection resumption and second resume procedure for data transfer. This segmentation enables data transmission without requiring full RRC connection resumption, thereby reducing unnecessary state transitions and network complexity.
Solution Approach 2:
Instead of performing complete RRC connection resumption (excessive action), the patent applies partial action through the second resume procedure that enables data transfer without full state transition. This partial action suffices for data transmission needs while avoiding unnecessary complexity.
3Ease of operation
If buffer status reporting uses predefined information only, then reporting simplicity is maintained, but accurate buffer status information may be lost
Solution Approach 1:
The buffer status reporting mechanism merges two information sources: predefined information (maintaining simplicity) and system information (providing accuracy). By combining these sources, the system achieves both ease of operation and accurate buffer status reporting without compromising either aspect.
Data Source
AI summary
A method and apparatus for data transfer in RRC_INACTIVE state is provided. Method for data transfer in RRC_INACTIVE state includes transmitting a UECapabilityInformation, receiving a RRCRelease, receiving a system information, initiating a second resume procedure and performing buffer status reporting based on a first information and a second information if second resume procedure is ongoing. The first information is predefined and the second information is included in the system information.