System Information Segmentation for Reduced-Capability Wireless Terminals
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Solution Overview
Problem
Reduced-capability terminal devices in LTE-based wireless telecommunications systems face challenges in receiving system information due to their limited bandwidth and processing capabilities, particularly when system information is broadcast using larger transport blocks or spanning more than their RF bandwidth, leading to difficulties in acquiring new system information and supporting coverage enhancement.
Innovation Solution
A method is introduced where terminal devices receive blocks of system information at predetermined times, including first scheduling information for additional blocks and a marker indicating the presence of second scheduling information, which provides instructions on how to receive further system information blocks, allowing reduced-capability devices to selectively receive and process only relevant information, such as through segmentation or replacement with default configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If system information is broadcast using larger transport blocks or spanning more than RF bandwidth, then system information can be transmitted more efficiently, but reduced-capability terminal devices cannot receive or process the information
Solution Approach 1:
The system information is divided into multiple transport blocks, where the first transport block contains essential information and scheduling details, while subsequent transport blocks contain additional system information. This segmentation allows reduced-capability devices to receive at least the first block within their bandwidth constraints while maintaining overall system information transmission efficiency.
Solution Approach 2:
The patent implements a two-stage reception approach where terminal devices first receive and process a partial set of system information (first transport block), then selectively receive additional information (subsequent transport blocks) based on their capabilities and needs. This partial action approach ensures basic functionality for reduced-capability devices while allowing full functionality for capable devices.
2Loss of time
If system information blocks are transmitted at frequent intervals, then terminal devices can acquire new system information faster, but battery consumption and network resource usage increase
Solution Approach 1:
The patent implements periodic transmission of system information blocks with configurable intervals. The first transport block is transmitted periodically at predetermined times, while subsequent blocks are transmitted based on scheduling information. This periodic action allows terminal devices to enter sleep modes between transmissions, reducing battery consumption while ensuring timely acquisition of system information updates.
Solution Approach 2:
The system includes mechanisms for terminal devices to provide feedback about their reception status and capabilities. Based on this feedback, the network can adjust the transmission schedule and content of system information blocks, optimizing the balance between acquisition speed and energy consumption for different device types.
Data Source
AI summary
A terminal device in a wireless telecommunication system which transmits a master information block and a first and a second system information block the first and second system information block comprising first and second scheduling information relating to the timing of at least one additional block of system information. The terminal device configured to receive the master information block of system information that comprises a marker instructing the terminal device to ignore the first scheduling information and process only the second scheduling information.