Base Station System Information Broadcast Segmentation
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Solution Overview
Problem
In existing LTE systems, periodic broadcasting of all system information by base stations leads to low system resource utilization and high energy consumption, as it does not consider the varying acquisition requirements of user equipment, and there is a lack of efficient methods for user equipment to determine changes in system information.
Innovation Solution
The classification of system information into periodically and non-periodically broadcast types, with specific change indications sent by the base station to user equipment, allowing for targeted updates and reducing unnecessary broadcasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base station periodically broadcasts all system information, then user equipment can acquire system information at any time, but system resource utilization is low and energy consumption is high
Solution Approach 1:
The patent segments system information into two categories: periodic system information (broadcast regularly) and on-demand system information (sent only when requested or updated). This segmentation allows the base station to avoid broadcasting all system information periodically, reducing energy consumption while ensuring UEs can acquire necessary information through targeted requests.
Solution Approach 2:
The patent applies periodic action selectively - only critical system information is broadcast periodically, while non-critical information is transmitted on-demand. This resolves the contradiction by maintaining periodic broadcasting for essential information while eliminating unnecessary periodic transmissions of non-essential information.
2Loss of information
If the base station broadcasts all system information supported by the eNB, then comprehensive information is available, but unnecessary information is repeatedly sent resulting in low system resource utilization
Solution Approach 1:
The patent applies local quality by tailoring system information transmission to specific UE requirements. Different UEs receive different sets of system information based on their individual needs, rather than all UEs receiving the complete set. This ensures each UE gets comprehensive information it needs while avoiding unnecessary information transmission.
Solution Approach 2:
The patent enables UEs to self-determine what system information they need and request only that information. The UE autonomously identifies its information requirements and initiates requests to the base station, eliminating the need for the base station to broadcast all possible system information.
3Extent of automation
If system information is sent through periodic broadcasting, then UEs can acquire information without requests, but the method does not consider the acquisition requirements of the UE
Solution Approach 1:
The patent introduces dynamics by allowing the system to switch between periodic broadcasting and on-demand transmission modes based on UE requirements. The system adapts its information delivery mechanism - using automatic periodic broadcasting when appropriate and UE-initiated requests when specific information is needed, combining both approaches optimally.
4Device complexity
If change indication for system information is not provided, then broadcasting is simpler, but user equipment cannot efficiently detect changes in system information
Solution Approach 1:
The patent uses change indication values (analogous to color changes) to signal system information updates to UEs. When system information changes, the base station updates the change indication value, and UEs monitor these values to detect changes. This provides an efficient, low-complexity mechanism for change detection without requiring complex notification protocols.
Data Source
AI summary
A method performed by a user equipment and a user equipment are provided. The method includes receiving a change indication for a system information block (SIB) from system information which is broadcast periodically; if the change indication is different from a stored value of the SIB, considering the SIB as invalid; if the SIB is stored and invalid and is indicated as not broadcast, acquiring the SIB by sending a system information acquisition request; and if the SIB is stored and invalid and is broadcast, acquiring the SIB from a corresponding system information window (SI-window).