On-Demand System Information Acquisition in Multi-SCS Mobile Networks
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Solution Overview
Problem
In mobile communication systems with multiple subcarrier spacings, particularly in Next Radio (NR) systems, there is a need for an efficient method to acquire system information, as part of which is provided on-demand and requires determination of subcarrier spacings, SIBs, and preamble requests to facilitate data transfer.
Innovation Solution
A method and apparatus for system information acquisition in OFDM-based mobile communication systems with multiple subcarrier spacings, where a terminal acquires necessary information to determine subcarrier spacings, identifies System Information Blocks (SIBs) to request, determines the SIB group, generates a preamble for request, and transmits it to receive the requested SIB group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple subcarrier spacings are supported in NR system, then the system can fulfill various QoS requirements in diverse deployment scenarios, but the complexity of system information acquisition increases due to the need to determine appropriate SCS for SIB1 and other SIBs
Solution Approach 1:
The patent applies preliminary action by providing SCS indication information in advance through MIB or SIB1, before the UE needs to acquire other SIBs. This allows the UE to determine the appropriate subcarrier spacing for SIB1 and subsequent SIB acquisitions without complex real-time calculations, thereby reducing acquisition complexity while maintaining adaptability to various QoS requirements
2Adaptability or versatility
If system information is transmitted in different SCS compared to MIB transmission, then flexibility in system information delivery is improved, but the difficulty of detecting and measuring the appropriate SCS for SIB acquisition increases
Solution Approach 1:
The patent introduces an intermediary mechanism by using SCS indication information as a mediator between the network's flexible SCS selection and the UE's SIB acquisition process. This indication information, transmitted through MIB or SIB1, bridges the gap by providing the UE with the necessary SCS information without requiring complex detection and measurement, thus maintaining transmission flexibility while reducing detection difficulty
3Productivity
If on-demand system information is provided, then the efficiency of system information delivery is improved, but the complexity of determining which SIBs to request and how to request them increases
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine which SIBs to request based on pre-configured SCS indication information and its own communication needs. The UE can independently identify required SIBs, determine the appropriate SCS for their acquisition, and formulate requests without extensive network guidance, thereby improving delivery efficiency while managing request determination complexity through autonomous decision-making
Data Source
AI summary
Data transfer method and apparatus for use in a mobile communication system are provided. Method to acquire system information blocks includes receiving MIB from a base station, receiving SIB1 from the base station based on parameter included in the MIB, determining SIBs to be requested based on information received in SIB 1, determining SIB group to be requested based on information received in SIB 1 and SIBs to be requested, determining the preamble to be used for requesting SIB group based on information received in SIB 1 and transmitting the determined preamble to request the determined SIB group.