Wireless System Information Updates via Base Station Change Signals
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing system information updates, leading to increased energy consumption and latency due to frequent requests for configuration parameters.
Innovation Solution
A base station informs wireless devices of system information changes through a message during periods when system information is not being sent, allowing devices to expect updated information without sending additional requests, thereby optimizing energy usage and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If wireless devices send frequent requests for system information updates, then system information can be kept current, but energy consumption increases
Solution Approach 1:
Instead of devices requesting system information updates (device-initiated approach), the base station proactively notifies devices of changes through change indicators (network-initiated approach). This inversion eliminates the need for frequent device requests while ensuring devices receive timely updates about system information changes.
Solution Approach 2:
The base station autonomously monitors its own system information changes and generates notifications without requiring device requests. The change indicator mechanism allows the network to self-manage information distribution, reducing device energy consumption while maintaining information currency.
2Loss of information
If wireless devices send frequent requests for system information updates, then system information can be kept current, but latency increases
Solution Approach 1:
The base station prepares change indicators in advance and transmits them during downlink transmissions before devices would need to request updates. This preliminary notification mechanism ensures devices are informed of changes immediately when they occur, eliminating the request-response delay and reducing update latency.
Solution Approach 2:
The change indicator serves as immediate feedback to devices about system information status. When system information changes, the base station provides real-time notification through the change indicator, allowing devices to update their configurations without waiting for scheduled updates or sending requests, thus minimizing latency.
3Loss of information
If base station sends system information frequently, then devices receive updated information, but network overhead increases
Solution Approach 1:
The patent extracts only the essential change notification information from full system information transmissions. Instead of sending complete system information messages for every update, the base station transmits compact change indicators that convey the minimum necessary information about what has changed, significantly reducing network overhead while ensuring devices are informed of updates.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A wireless device may request system information, such as a system information block, from a base station on demand. The base station may indicate to the wireless device a change in system information via a message, for example, during a time period that the base station is not sending system information to the wireless device. The wireless device may expect to receive updated system information, for example, based on receiving the message, without having to send a request to the base station for system information.