On-Demand System Information Delivery Using Value Tags
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Solution Overview
Problem
Current system information delivery methods in wireless networks are inefficient as they broadcast system information to all UEs without considering their conditions or characteristics, leading to unnecessary resource consumption and increased operational overhead.
Innovation Solution
The implementation of System Information Areas (SIAs) where UEs receive system information only when necessary, using On-Demand System Information delivery, where base stations transmit shared SI content to UEs within specific geographical areas, allowing UEs to determine if they need to update their SI based on OSA IDs and Value Tags, reducing redundant SI acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is broadcast to all UEs in the cell, then all UEs can acquire system information, but radio resources are wasted and operational overhead increases
Solution Approach 1:
The invention segments UEs into different groups based on their characteristics and conditions, and transmits different system information to different groups. This is achieved by the network determining UE groups and selectively broadcasting system information tailored to each group's needs, rather than transmitting identical information to all UEs in the cell.
Solution Approach 2:
The invention applies local quality by customizing system information transmission according to specific UE conditions and characteristics. Each UE group receives system information optimized for its particular situation, ensuring that information is delivered with appropriate quality and relevance rather than using a uniform approach for all UEs.
2Loss of information
If system information is broadcast to all UEs, then complete information is provided, but unnecessary SI acquisition occurs during cell reselection
Solution Approach 1:
The invention performs preliminary action by pre-determining which UEs need which system information based on their characteristics. The network proactively identifies UE groups and prepares appropriate system information transmissions before UEs perform cell reselection, enabling UEs to acquire only the necessary information without unnecessary acquisitions.
Solution Approach 2:
The invention applies partial action by transmitting only the necessary system information to each UE group rather than complete system information to all UEs. This selective transmission ensures that UEs receive sufficient information for their specific needs without the overhead of acquiring unnecessary system information during cell reselection.
3Reliability
If system information is transmitted to all UEs, then no SI update is missed, but network overhead increases
Solution Approach 1:
The invention introduces dynamics by making system information transmission adaptive to changing UE conditions and network states. The network dynamically determines UE groups and adjusts system information transmission based on current conditions, allowing reliable SI update delivery while optimizing network overhead through flexible, condition-based transmission strategies.
Data Source
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AI summary
A method for providing system information (SI) by a base station (BS) in a wireless communication network, the SI comprising minimum SI and at least one other SI block, the method comprising: broadcasting the minimum SI having an area identification (ID) and at least one value tag; receiving a radio resource control (RRC) message requesting the at least one other SI block from a user equipment (UE) when the area ID is different from a stored area ID on the UE or when the value tag is different from a stored value tag on the UE.