System Information Handling in Wireless Networks
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Solution Overview
Problem
In wireless communication networks, especially for eMTC and NB-IoT, the current system information acquisition process is inefficient, leading to increased power consumption and reduced battery life due to frequent updates of system information, even when the information is not critical or needed immediately.
Innovation Solution
Implementing a mechanism where user equipment (UE) receives an indication of system information updates, allowing it to determine whether to retrieve the updated information based on its type, with critical information always being up-to-date and less critical information being delayed until needed, using spare bits in Direct Indication information for eMTC and NB-IoT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE retrieves all updated system information frequently, then the system information is always up-to-date, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent segments system information into two categories: critical system information (CS1) and non-critical system information (CS2). The UE selectively retrieves only CS1 when a system information update is indicated, while optionally delaying retrieval of CS2. This segmentation allows the UE to maintain necessary system information while reducing unnecessary active time and power consumption associated with retrieving all system information updates.
2Use of energy by moving object
If the UE delays retrieving non-critical system information, then the battery life increases, but the system information may become outdated
Solution Approach 1:
The patent applies local quality by differentiating the handling of system information based on its criticality. Critical system information (CS1) is retrieved immediately to ensure validity and reliability, while non-critical system information (CS2) is optionally delayed. This localized quality approach ensures that only the necessary information is kept up-to-date, balancing power consumption with information validity requirements.
3Measurement precision
If the UE always retrieves updated system information, then the information accuracy is maintained, but the active time increases reducing energy efficiency
Solution Approach 1:
The patent segments system information into critical (CS1) and non-critical (CS2) categories, allowing the UE to selectively retrieve information based on accuracy needs. By retrieving only CS1 immediately and optionally delaying CS2, the UE maintains necessary information accuracy while significantly reducing the duration of active time, thereby improving energy efficiency.
4Reliability
If the network broadcasts frequent system information updates, then the information freshness is improved, but the network overhead increases
Solution Approach 1:
The patent applies local quality by enabling the network to indicate updates of critical system information (CS1) selectively. The network can broadcast update indications for CS1 without necessarily broadcasting all system information updates, thereby maintaining information freshness for critical parameters while reducing overall network overhead associated with broadcasting every system information change.
Data Source
AI summary
Embodiments herein relate e.g. a method performed by a radio network node (12) for handling system information of a wireless communication network (1). The radio network node (12) transmits an indication to a UE (10), the indication associated with an update of system information of the wireless communication network (1), wherein the indication indicates a type of system information. The indication may indicate whether the update regards critical system information being a first type of system information, or less critical system information being a second type of system information.