RRC_INACTIVE State Data Transfer Mechanism
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Solution Overview
Problem
The existing mobile communication systems face challenges in efficiently transitioning from the RRC_INACTIVE state to the RRC_CONNECTED state for data transfer, leading to excessive overhead and reduced network efficiency.
Innovation Solution
A method and apparatus for data transfer in the RRC_INACTIVE state, involving a terminal that receives a RRCRelease message from a first base station, determines a radio bearer group, receives system information from a second base station, initiates a second resume procedure, re-establishes PDCP entities, resumes radio bearers, and transmits a RRCResumeRequest message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transitions from RRC_INACTIVE state to RRC_CONNECTED state for data transfer, then reliable data transmission is ensured, but excessive overhead and reduced network efficiency occur
Solution Approach 1:
The patent segments the data transfer process by introducing a new data transfer mode that operates independently within the RRC_INACTIVE state. This segmentation allows the UE to handle data transfer without transitioning to RRC_CONNECTED, thus maintaining reliability for small data transmissions while avoiding the overhead associated with full connection establishment, thereby improving network efficiency.
2Productivity
If the UE transitions to RRC_CONNECTED state for data transfer, then complete data transfer capability is achieved, but excessive signaling overhead occurs
Solution Approach 1:
The patent extracts the essential data transfer functionality from the full RRC_CONNECTED state transition process. By enabling data transfer directly in the RRC_INACTIVE state through a new data transfer mode, the solution removes the unnecessary signaling overhead associated with complete connection establishment while retaining the core data transfer capability, thus reducing signaling overhead without sacrificing productivity.
3Productivity
If the UE remains in RRC_INACTIVE state for data transfer, then overhead is reduced and network efficiency is improved, but state transition challenges occur
Solution Approach 1:
The patent introduces dynamic behavior by enabling the UE to flexibly switch between traditional state transition and the new data transfer mode within RRC_INACTIVE state. This dynamic approach allows the system to adapt to different data transfer scenarios, reducing state transition complexity for small data transmissions while maintaining the option to transition to RRC_CONNECTED when necessary, thereby improving network efficiency without excessive complexity.
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 an uplink RRC message together with data in a MAC PDU. During the procedure, specific radio bearers are resumed and MAC CE are transmitted for data transmission.