System Information Request via Random Access Broadcast Indication
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Solution Overview
Problem
The increasing number of system information blocks in wireless communication systems leads to a higher demand for radio resources, resulting in inefficient use and potential waste of resources due to unnecessary random access procedures by user equipment (UE) when requesting system information.
Innovation Solution
A method for a UE to efficiently request system information by initiating a random access procedure, receiving a broadcast indication from the base station (BS) indicating when the requested system information is broadcast, and stopping the random access procedure, thereby avoiding unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the number of system information blocks is increased to meet wireless data traffic demands, then the system information completeness is improved, but the radio resource consumption increases
Solution Approach 1:
The patent segments system information into mandatory SIBs (always broadcast) and optional SIBs (broadcast only when requested). This segmentation allows the system to maintain information completeness by dividing information into essential and supplementary categories, while reducing radio resource consumption by selectively broadcasting only necessary SIBs based on UE requests.
2Loss of information
If the UE initiates a random access procedure to request system information, then the information acquisition capability is improved, but the radio resource waste increases due to unnecessary procedures
Solution Approach 1:
The patent implements preliminary action by having the BS pre-broadcast availability information about optional SIBs before the UE initiates random access. This allows the UE to determine in advance whether a random access procedure is necessary, thereby maintaining information acquisition capability while preventing unnecessary random access procedures that would waste radio resources.
Solution Approach 2:
The patent employs feedback mechanisms where the BS provides information about the availability of optional SIBs to the UE. This feedback enables the UE to make informed decisions about whether to initiate random access procedures, thus maintaining effective information acquisition while reducing unnecessary radio resource consumption through feedback-driven procedure optimization.
3Loss of information
If the UE continuously monitors for system information updates, then the information freshness is improved, but the processing overhead and resource usage increase
Solution Approach 1:
The patent implements periodic action by having the BS broadcast optional SIBs only at specific intervals or triggers rather than continuously. The UE monitors for these periodic broadcasts or trigger events, which maintains information freshness by ensuring updates are transmitted regularly, while reducing processing overhead by eliminating the need for continuous monitoring and processing.
Data Source
AI summary
Provided are a method for requesting, by a user equipment (UE), system information in a wireless communication system and a device supporting the same. The method may include: initiating a random access procedure; requesting system information from a base station (BS) in the initiated random access procedure; receiving, from the BS, a broadcast indication indicating that the requested system information is broadcast in the initiated random access procedure after requesting the system information from the BS; and stopping the initiated random access procedure.