On-Demand System Information Change Signals for Wireless Devices
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Solution Overview
Problem
Wireless devices currently require frequent requests for system information updates, leading to increased energy consumption and latency due to continuous monitoring and transmission of system information by base stations.
Innovation Solution
A base station informs wireless devices of system information changes via a message during periods when system information is not being sent, allowing devices to expect updates without sending additional requests, thereby reducing unnecessary energy consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations continuously send system information to wireless devices, then devices can maintain up-to-date configuration parameters, but energy consumption and network latency increase
Solution Approach 1:
The base station transitions from continuous system information transmission to periodic transmission, sending updates only at specific intervals or when changes occur. This is achieved through discontinuous reception (DRX) cycles where devices wake up at predetermined times to check for system information changes, thereby reducing overall transmission frequency and energy consumption while maintaining information currency.
Solution Approach 2:
The system implements on-demand system information retrieval where wireless devices autonomously determine when to request system information based on their needs and configured parameters. Devices can send requests when they need updated configuration parameters rather than receiving continuous broadcasts, allowing them to self-manage their information updates and reduce unnecessary energy consumption from constant monitoring.
2Reliability
If base stations continuously send system information to wireless devices, then devices can maintain up-to-date configuration parameters, but network latency increases
Solution Approach 1:
By implementing periodic transmission at optimized intervals rather than continuous transmission, the system reduces the time resources dedicated to system information broadcasting. Devices synchronize to these periodic transmissions and can plan their operations accordingly, reducing overall network latency while ensuring devices receive updates at appropriate intervals to maintain configuration accuracy.
Solution Approach 2:
Devices autonomously request system information only when necessary based on their operational needs, configured parameters, or detected changes in service requirements. This on-demand approach eliminates unnecessary transmission delays and allows devices to retrieve information at optimal moments, reducing overall network latency compared to continuous broadcasting schedules.
3Reliability
If wireless devices frequently request system information updates, then devices can maintain accurate configuration parameters, but device complexity and processing overhead increase
Solution Approach 1:
The system changes the operational parameters of device behavior by implementing discontinuous reception (DRX) cycles with specific wake-up intervals and on-demand triggering conditions. Instead of continuous monitoring, devices operate with configured parameters that define when to wake up and check for system information, reducing processing overhead while maintaining configuration accuracy through parameter-driven operation.
Solution Approach 2:
The network pre-configures devices with DRX parameters, timing information, and triggering conditions for system information requests. Devices use these pre-configured parameters to autonomously determine when to wake up and request updates, eliminating the need for complex real-time decision-making algorithms and reducing processing overhead while ensuring timely information updates.
Data Source
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.