MBS Frequency Prioritization for RedCap Cell Reselection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Reduced Capability (RedCap) terminal devices face challenges in cell reselection due to their bandwidth limitations, as they can only receive services in cells supporting RedCap-specific common frequency resources, while non-RedCap devices can receive in a broader range, necessitating a new mechanism for guiding both types of devices differently in cell reselection decisions.
Innovation Solution
Introduce a new mechanism for guiding RedCap and non-RedCap terminal devices by including specific frequency selection guidance in service announcements, where RedCap devices prioritize frequencies indicated for their capabilities, and non-RedCap devices avoid or ignore frequencies indicated for RedCap devices, ensuring appropriate cell reselection based on bandwidth limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If same frequency selection guidance is used for both RedCap and non-RedCap terminal devices, then the guidance mechanism remains simple and universal, but RedCap terminal devices cannot reliably receive services in all cells of the service area due to bandwidth limitations
Solution Approach 1:
The frequency selection guidance is segmented into separate mechanisms for RedCap and non-RedCap terminal devices. The network provides distinct frequency selection information tailored to each device type, ensuring RedCap devices receive guidance compatible with their bandwidth limitations while non-RedCap devices use alternative guidance, thereby resolving the contradiction between reliability and complexity
Solution Approach 2:
Different frequency selection guidance is provided locally for different device types within the same service area. RedCap terminal devices receive frequency selection information optimized for their capabilities, while non-RedCap devices receive different guidance, allowing each device type to operate reliably without requiring a complex unified mechanism for all devices
2Adaptability or versatility
If RedCap-specific common frequency resources are introduced for MBS reception, then RedCap terminal devices can receive services in cells supporting their bandwidth limitations, but the cell reselection mechanism becomes more complex requiring separate guidance for different device types
Solution Approach 1:
The network acts as an intermediary by providing device-type-specific frequency selection guidance through the cell reselection mechanism. This intermediary guidance layer translates the complex reality of mixed RedCap and non-RedCap device support into simple, device-appropriate instructions, enabling broad service area coverage without requiring each device to independently handle the complexity of compatibility decisions
Data Source
AI summary
According to an aspect, there is provided an apparatus configured to perform the following. The apparatus receives a service announcement of a multicast broadcast service. The apparatus receives, in the service announcement and/or in at least one message following the service announcement, at least one indication indicating support for all or at least some reduced capability terminal devices for the multicast broadcast service. The apparatus performs a cell reselection process based on cell measurements and the at least one indication.