5G System Information Updates Using Conditional SI Notification
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Solution Overview
Problem
In 5G wireless communication systems, the immediate transmission of system information (SI) changes results in resource waste due to the on-demand nature of SI, as conventional methods do not account for voluntary requests from terminals.
Innovation Solution
A method where terminals receive an SI change notification and subsequently request or receive updated SI only when necessary, and network-side equipment transmits SI change notifications and updates accordingly, optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station immediately transmits updated system information to the terminal after a change occurs, then the terminal can obtain the latest system information in a timely manner, but system resources are wasted due to unnecessary transmissions when the terminal does not need the updated information
Solution Approach 1:
The terminal feeds back its system information acquisition status to the base station through indication information. This feedback mechanism allows the base station to determine whether the terminal has already obtained the updated system information, enabling conditional transmission decisions that avoid unnecessary resource consumption while ensuring timely updates when needed.
Solution Approach 2:
The system transitions from a static immediate transmission approach to a dynamic conditional transmission approach. The base station adaptively adjusts its transmission behavior based on real-time feedback from the terminal about its information acquisition status, optimizing resource utilization while maintaining update timeliness.
2Loss of energy
If the base station transmits system information on demand rather than immediately upon change, then system resource utilization is improved, but the terminal may experience delays in receiving necessary system information updates
Solution Approach 1:
The base station prepares and transmits system information updates in advance when changes occur, but holds them conditionally pending terminal feedback. This preliminary action ensures the information is ready for immediate transmission if needed, while the conditional holding mechanism prevents premature transmission that would waste resources, thus balancing timeliness and resource efficiency.
3Reliability
If the terminal continuously monitors for system information changes, then it can receive updates immediately, but terminal energy consumption increases
Solution Approach 1:
The terminal uses its own feedback about information acquisition status to control the reception process. By indicating whether it has already obtained the updated system information, the terminal enables the base station to serve it efficiently without requiring continuous active monitoring, thus reducing terminal energy consumption while maintaining responsiveness.
4Loss of energy
If the base station transmits system information only when explicitly requested by the terminal, then resource waste is minimized, but the terminal may not receive critical updates proactively
Solution Approach 1:
The system merges the proactive transmission approach (base station initiates) with the reactive on-demand approach (terminal requests). The base station proactively transmits updates when changes occur, but merges this with terminal feedback about acquisition status to determine whether actual transmission is necessary, thus maintaining proactive delivery while achieving resource efficiency through the combined mechanism.
Data Source
AI summary
A method of transmitting system information, a terminal and a network-side equipment are provided. The method includes: receiving, by a terminal, an SI change notification transmitted by a first network-side equipment; and receiving, by the terminal, SI transmitted by the first network-side equipment and corresponding to the SI change notification. And the SI change notification is carried in a DCI format corresponding to a PDCCH used for scheduling the paging message, or a DCI format corresponding to a PDCCH scrambled with C-RNTI.