System Information Block Status Sharing to Reduce Handover Signaling
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Solution Overview
Problem
In wireless communication systems, UEs frequently request system information blocks (SIBs) upon cell reselection or handover, leading to unnecessary signaling and battery consumption due to the lack of shared SIB transmission status among network entities.
Innovation Solution
Network entities share SI provisioning status information, allowing them to predict and transmit requested SIBs without additional UE requests, thereby reducing signaling and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs request SIBs upon cell reselection or handover, then system information can be obtained, but signaling overhead and battery consumption increase
Solution Approach 1:
The source network entity performs preliminary actions by determining whether the target network entity has transmitted the requested SIB before the UE completes handover. This allows the target entity to pre-prepare and transmit the SIB, eliminating the need for the UE to perform additional requests after cell reselection, thereby reducing battery consumption while ensuring reliable system information acquisition
Solution Approach 2:
The source network entity receives feedback from the target network entity regarding SIB transmission status. This feedback mechanism enables the source entity to make informed decisions about whether to forward SIB requests or indicate that the SIB is already available, reducing unnecessary signaling and UE battery usage while maintaining reliable system information delivery
2Reliability
If UEs request SIBs upon cell reselection or handover, then system information can be obtained, but signaling overhead increases
Solution Approach 1:
The target network entity performs preliminary actions by transmitting the SIB before the UE completes handover to the target cell. This preliminary transmission eliminates the need for subsequent SIB requests and responses, reducing signaling overhead while ensuring the UE can reliably acquire system information in the new cell
Solution Approach 2:
A feedback mechanism is established where the source network entity receives information from the target entity about SIB transmission status. This feedback allows the source entity to suppress unnecessary SIB requests from the UE, reducing signaling overhead while maintaining reliable system information acquisition
3Loss of energy
If SIB transmission status is shared among network entities, then redundant requests are reduced, but network communication complexity increases
Solution Approach 1:
The patent extracts only the essential SIB transmission status information from the complex network communication protocol. By taking out just the necessary status indication (whether SIB is transmitted or not) and sharing it through existing signaling mechanisms, the solution reduces UE battery consumption without significantly increasing network communication complexity
Solution Approach 2:
The network entities use their existing communication infrastructure to share SIB transmission status information. The source and target entities leverage existing signaling pathways to exchange status information, allowing the system to reduce redundant requests and battery consumption without adding complex new communication protocols
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may transmit system information (SI) provisioning information to a second network entity. Numerous other aspects are described.