On-Demand System Information Request via Grouped Preambles
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Solution Overview
Problem
In wireless communication networks, existing methods for requesting system information (SI) result in inefficient energy usage and transmission overhead due to the broadcasting of unnecessary SI, especially when using preambles like MSG1 and MSG3, which can lead to contention and delay.
Innovation Solution
Classifying SI into groups based on relevance or correlation, allowing user terminals to request specific SIB groups using unique preambles or transmission timing, enabling the network to transmit only the necessary SI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all system information is broadcasted to ensure complete network access capability, then user terminals can access the network reliably, but energy consumption and transmission overhead increase significantly
Solution Approach 1:
The system information is segmented into multiple groups (first group and second group) with different priorities and access requirements. The first group contains essential information for basic network access, while the second group contains additional information for enhanced functionality. This segmentation allows user terminals to selectively acquire only the necessary information groups, reducing energy consumption while maintaining reliable network access capability.
2Reliability
If system information is transmitted continuously to ensure availability, then network access is always possible, but transmission overhead and network resource consumption increase
Solution Approach 1:
The network node transmits system information groups periodically according to different periodicities. The first group of system information is transmitted with a first periodicity, while the second group is transmitted with a second periodicity. This periodic transmission strategy ensures that essential information is always available for network access, while less critical information is updated less frequently, reducing overall transmission overhead and network energy consumption.
3Ease of operation
If generic preambles are used for information requests to simplify the protocol, then ease of operation is improved, but contention and delay occur reducing productivity
Solution Approach 1:
Different preambles are assigned to request different groups of system information (first preamble for first group, second preamble for second group). This local differentiation in preamble usage allows user terminals to specifically request only the information group they need, eliminating contention between different types of requests and improving information acquisition efficiency while maintaining protocol simplicity.
Data Source
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AI summary
A method for requesting system information is proposed. The method may comprise transmitting a request for at least one system information block group, each of which comprises one or more system information blocks, from a user terminal to a network node. The one or more system information blocks may be grouped according to a feature of the one or more system information blocks. The method may further comprise receiving one or more system information block groups from the network node. The one or more system information block groups may comprise the at least one system information block group.