Base Station Message Consolidation for 5G State Transition Delay
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing state transition delay, particularly with the introduction of the RRC inactive mode in 5G networks, where numerous messages are transmitted and received between user equipment (UE) and the base station (gNB), leading to potential delays and malfunctions.
Innovation Solution
The system simultaneously transmits RRC and NAS messages between the gNB and UE during state transitions, specifically when transitioning from the RRC connected mode to the RRC inactive mode, to reduce the number of messages and thereby minimize state transition delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple RRC and NAS messages are transmitted separately between gNB and UE during state transitions, then complete information exchange is achieved, but state transition delay increases
Solution Approach 1:
The patent combines multiple RRC messages and NAS messages into a single transmitted message during state transitions. Specifically, when transitioning from RRC connected mode to RRC inactive mode, the gNB includes both the RRC release message and the NAS transport message in one transmission to the UE, eliminating the need for separate message exchanges and reducing overall transition delay.
2Productivity
If the number of messages transmitted during state transitions is reduced, then state transition delay is minimized, but message processing complexity increases
Solution Approach 1:
Multiple messages are merged into one transmission unit, reducing the total number of message exchanges during state transitions. This improves transition efficiency while the complexity is managed through standardized message structures that include clear delimiters and identification fields for different message types.
Solution Approach 2:
The combined message is segmented into distinct parts with clear boundaries, allowing the UE and gNB to process different message components (RRC message and NAS message) separately within the single transmission. This segmentation maintains processing clarity while achieving message consolidation benefits.
Data Source
AI summary
A base station includes a memory and a processor coupled to the memory and configured to transmit, when a state transition of a mobile station is performed, a first control signal to the mobile station, and perform control to simultaneously transmit the first control signal and a second control signal different from the first control signal to the mobile station when a first state transition, which causes a state of the mobile station to transfer from a first state to a second state, is performed, and then a second state transition, which causes the state of the mobile station to transfer from the second state to a third state, is performed.