Dual RMSI Configuration for RedCap and NR Initial Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing RMSI transmission is not suitable for Reduced Capability (Redcap) terminals due to differences in processing and coverage capabilities compared to normal NR terminals.
Innovation Solution
Configuring distinct RMSI configurations for Redcap and normal UE, including different PDCCH and PDSCH transmission mechanisms, modulation orders, and resource allocation to accommodate varying capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing RMSI transmission is used for normal NR terminals, then normal NR terminals can access the network, but Redcap terminals cannot successfully access due to capability mismatches
Solution Approach 1:
The patent segments the RMSI configuration into separate configurations for normal NR terminals and Redcap terminals. The network device transmits different RMSI configurations to different terminal types, allowing each to access according to its specific capabilities rather than using a unified configuration that fails for Redcap terminals.
Solution Approach 2:
The patent applies local quality by tailoring the RMSI configuration parameters (such as subcarrier spacing, cyclic prefix length, resource block allocation) to match the specific processing and coverage capabilities of each terminal type. Normal NR terminals receive configurations optimized for their capabilities, while Redcap terminals receive configurations adapted to their reduced capabilities.
2Adaptability or versatility
If distinct RMSI configurations are transmitted for different terminal types, then both normal and Redcap terminals can access successfully, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by having the network device pre-configure and store multiple RMSI configurations corresponding to different terminal types before actual access occurs. When a terminal attempts to access, the network device can quickly identify the terminal type and retrieve the appropriate pre-configured RMSI configuration, avoiding complex real-time calculations and reducing access delay.
3Temperature
If RMSI is transmitted with higher aggregation degree for Redcap terminals, then coverage capability is improved, but processing capability requirements increase
Solution Approach 1:
The patent applies parameter changes by adjusting key RMSI transmission parameters such as aggregation degree, subcarrier spacing, and resource block allocation based on the terminal type. For Redcap terminals with reduced processing capability, the network device transmits RMSI with higher aggregation degree and more robust modulation to ensure reliable reception in coverage-limited scenarios, while normal NR terminals receive configurations with lower aggregation degree to conserve their processing energy.
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The present disclosure relates to an RMSI configuration method and apparatus, a user equipment (UE), a network device, and a storage medium. The RMSI configuration method comprises: a UE receives first configuration information, the first configuration information comprising configuration information of a first RMSI and configuration information of a second RMSI, wherein the configuration information of the first RMSI is configuration information of an RMSI for a first type of UE, and the configuration information of the second RMSI is configuration information of an RMSI for a second type of UE; the UE performs initial access on the basis of the configuration information of the first RMSI or the configuration information of the second RMSI. The present disclosure sets two types of RMSIs, and respectively configures bearing modes, transmission modes, etc., of the two types of RMSIs, so that the two types of RMSIs are respectively applicable to different UEs. The UE listens to a corresponding RMSI and performs random access according to its own type or the current channel transmission quality, etc. According to embodiments of the present disclosure, corresponding RMSIs are broadcast for different terminal access characteristics, thus improving the system access capacity and the UE access efficiency.