RRC Inactive Resume Control for Low-Overhead 5G Data Transfer
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Solution Overview
Problem
The inefficiency in transitioning from RRC_INACTIVE to RRC_CONNECTED state for data transfer in 5G wireless communication systems leads to excessive network overhead when data transmission is not justified, reducing system efficiency.
Innovation Solution
A method and apparatus for data transfer in RRC_INACTIVE state, involving a first resume procedure for state transition and a second resume procedure for data transmission/reception without full state transition, utilizing timer manipulation and radio bearer group configurations to optimize data handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full RRC state transition (RRC_INACTIVE to RRC_CONNECTED) is performed for data transfer, then data transmission reliability is improved, but network overhead increases and system efficiency decreases
Solution Approach 1:
The resume procedure is divided into two independent parts: first resume procedure for state transition (RRC_CONNECTED) and second resume procedure for data transfer in RRC_INACTIVE state. This segmentation allows selective application based on data amount, avoiding unnecessary full state transitions for small data transfers and thus reducing network overhead while maintaining reliability for essential cases.
Solution Approach 2:
Instead of always performing complete RRC state transition, the system applies partial action by enabling data transfer directly in RRC_INACTIVE state for small data amounts. This partial resume procedure avoids excessive full state transitions, reducing network overhead and improving system efficiency while maintaining adequate reliability for the data transfer scenario.
2Reliability
If RRC state transition is performed for every data transfer request, then data transmission is ensured, but network overhead increases
Solution Approach 1:
The system dynamically selects between first resume procedure (full state transition) and second resume procedure (data transfer in INACTIVE state) based on real-time conditions, specifically the data amount threshold. This dynamic adaptation allows the system to avoid unnecessary full state transitions for small data transfers, reducing network overhead while ensuring data transmission reliability when needed.
Solution Approach 2:
The system changes the operational parameter by introducing a data amount threshold that determines which resume procedure to use. When data amount is below the threshold, the system uses the lighter second resume procedure; when above, it uses the more reliable first resume procedure. This parameter-based differentiation reduces network overhead without compromising transmission assurance.
3Ease of operation
If timer is started after applying SRB1 configuration in second resume procedure, then procedure timing is controlled, but complexity of timer management increases
Solution Approach 1:
The timer is started immediately after applying SRB1 configuration, which is a preliminary action in the second resume procedure. This timing ensures that the timer is active before data transfer begins, providing proper procedure timing control. The timer management complexity is contained within this specific procedural step, making it manageable through clear sequence definition.
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 receiving configuration information for second resume procedure, initiating second resume procedure and transmitting a uplink RRC message together with data in a MAC PDU. During the procedure, a timer starts and stops at specific time points for supervising the procedure.