Multicast Frequency Prioritization for RedCap Cell Reselection
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Solution Overview
Problem
RedCap terminal devices, due to their bandwidth limitations, face challenges in receiving multicast broadcast services as existing frequency selection guidance is not suitable for both RedCap and non-RedCap devices, leading to inconsistent service availability.
Innovation Solution
A new mechanism is introduced to guide RedCap and non-RedCap terminal devices differently during cell reselection by using separate frequency selection indications in service announcements, allowing RedCap devices to prioritize frequencies compatible with their bandwidth limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate frequency selection guidance is introduced for RedCap and non-RedCap terminal devices, then service availability for RedCap devices is improved, but device complexity and network configuration complexity increase
Solution Approach 1:
The frequency selection guidance is segmented into separate mechanisms for RedCap and non-RedCap terminal devices. The network configures different frequency selection indications (FSIs) specifically tailored to each device type's capabilities, allowing RedCap devices to receive service on frequencies compatible with their bandwidth limitations while non-RedCap devices use the standard frequency selection process.
Solution Approach 2:
The frequency selection indication is customized locally for each terminal device type based on their specific capabilities. RedCap devices receive FSI configurations that account for their maximum bandwidth constraints, while non-RedCap devices receive standard FSI configurations, ensuring each device type operates optimally within its capability boundaries.
2Adaptability or versatility
If RedCap-specific common frequency resources are introduced, then RedCap terminal devices can receive multicast broadcast service, but network configuration and management become more complex
Solution Approach 1:
Common frequency resources are segmented into RedCap-specific CFRs and standard CFRs. The network configures separate RedCap CFRs that are specifically adapted to RedCap terminal devices' bandwidth capabilities, while maintaining standard CFRs for non-RedCap devices. This segmentation allows simultaneous support for both device types without requiring complete reconfiguration of the network.
Solution Approach 2:
The frequency selection indication mechanism is designed to be universal, serving both RedCap and non-RedCap terminal devices through a common signaling framework. The same FSI configuration process is used for both device types, but with different parameter values tailored to each type's capabilities, reducing the need for entirely separate configuration systems.
Data Source
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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 service announcement comprises either at least one frequency selection area identity, FSAI, and at least one indication indicating that the at least one FSAI is defined for reduced capability terminal devices or at least one frequency and at least one indication indicating that the at least one frequency is defined for reduced capability terminal devices. The apparatus performs a cell reselection process based on cell measurements and the service announcement.