Beam-Specific RMSI for 5G NR Coverage Enhancement
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Solution Overview
Problem
Current 5G NR technology faces challenges in efficiently transmitting beam-specific system information, leading to suboptimal coverage and resource utilization in wireless communication systems, particularly in millimeter wave frequencies where path loss and obstacles affect signal strength and coverage.
Innovation Solution
The implementation of Remaining Minimum System Information (RMSI) that includes beam-specific system information associated with synchronization signal blocks (SSBs), allowing base stations to transmit and user equipment (UE) to receive optimized beam-specific parameters for improved coverage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-specific system information is transmitted for each SSB beam, then coverage and signal reception are improved, but device complexity and information overhead increase
Solution Approach 1:
The patent applies local quality by providing different system information parameters for different SSB beams. Each beam-specific information includes parameters tailored to that beam's characteristics (such as frequency range, subcarrier spacing, cyclic prefix type), allowing the network to optimize coverage and reception for each beam direction independently rather than using uniform parameters for all beams
Solution Approach 2:
The patent segments the system information by associating it with specific SSB beam indices. The RMSI includes beam-specific parameters that are segmented and organized according to SSB beam identifiers, allowing the UE to selectively process only the information relevant to the beam it is receiving, thereby managing complexity through structured segmentation
2Productivity
If beam-specific parameters are included in RMSI, then resource allocation efficiency is improved, but message size and transmission overhead increase
Solution Approach 1:
The patent implements preliminary action by including beam-specific system information in the RMSI before the UE needs to access the network. The beam-specific parameters (such as random access configurations, physical channel parameters) are pre-configured and associated with specific SSB beams, allowing UEs to quickly determine the appropriate parameters for their selected beam without additional signaling or trial-and-error procedures
Solution Approach 2:
The patent applies local quality by providing differentiated resource allocation parameters for different beams. Each beam-specific information set includes locally optimized parameters such as random access preamble formats, power ramping parameters, and physical uplink control channel configurations that are tailored to the specific beam's propagation characteristics and traffic requirements
Data Source
AI summary
Aspects presented herein may enable the base station to apply coverage enhancement for one or more SSB beam(s) or a subset of SSB beams for broadcasting system information in a more efficient manner, where the base station and the UE may adapt the system information differently for different SSB beams. In one aspect, a UE may receive, from a base station, RMSI indicating beam-specific system information in association with one or more SSB beams for receiving an SSB. Then, the UE may receive the SSB from the base station based on the received RMSI indicating the beam-specific system information.