Beam-Based System Information Reception in 5G Networks
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Solution Overview
Problem
In 5G communication systems, the increasing number of system information blocks necessitates more radio resources for broadcasting, and high-frequency bands require effective methods to mitigate path loss and extend transmission distance, particularly for on-demand system information delivery.
Innovation Solution
A method for user equipment to select a beam, transmit a system information request via a random access channel preamble, receive beam information indicating the specific beam for data transmission, and efficiently receive system information using beamforming, allowing for optimized resource allocation and data rate enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the number of system information blocks is increased to meet communication demands, then the completeness of system information is improved, but the amount of radio resources required for broadcasting increases
Solution Approach 1:
The patent segments system information into mandatory system information blocks (broadcast periodically) and optional system information blocks (transmitted on-demand). This segmentation allows the network to provide complete system information while reducing routine broadcasting resources by only transmitting optional blocks when actually needed by UEs.
Solution Approach 2:
The patent implements a self-service mechanism where UEs autonomously determine which optional system information blocks they need and request them individually. The network then transmits only the requested blocks, eliminating the need to broadcast all possible optional information blocks continuously, thus reducing radio resource consumption.
2Length of stationary object
If beamforming technology is applied to mitigate path loss in high-frequency bands, then transmission distance is increased, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by having the UE perform beam measurement and selection before requesting optional system information. The UE measures reference signals from multiple beams, identifies the best beam, and uses this beam for subsequent communication. This preliminary beam selection simplifies the overall system by avoiding the need for continuous beam management during optional information transmission.
Solution Approach 2:
The patent applies local quality by optimizing the specific beam used for optional system information transmission based on local channel conditions. The UE selects the beam with the best quality (highest RSRP) for its specific location and communicates with the network through that beam, rather than requiring the network to manage multiple beams simultaneously for all UEs.
3Productivity
If on-demand system information transmission is implemented, then radio resource efficiency is improved, but the complexity of information management increases
Solution Approach 1:
The patent implements dynamics by making the optional system information blocks dynamically transmittable based on actual UE requests. The network configures multiple optional information blocks with different content, and only transmits those that are requested. This dynamic approach allows the system to adapt to varying UE needs, improving radio resource efficiency while keeping information management complexity manageable through standardized procedures.
Data Source
AI summary
A method for a terminal to receive system information in a wireless communication system on the basis of beam information, and a device supporting the method are provided. The method may comprise: a step of selecting a beam; a step of transmitting, to a base station, a system information request including a random access channel (RACH) preamble corresponding to the selected beam; a step of receiving a response to the RACH preamble from the base station, wherein the response to the RACH preamble includes beam information indicating a specific beam; and a step of receiving system information requested by the system information request, via the specific beam indicated by the beam information.