MBS Frequency Resource Sets for NR Idle-State Service Reception
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Solution Overview
Problem
Current 3GPP specifications restrict multicast and broadcast services to UEs in RRC connected state, limiting their availability to UEs in idle or inactive states, necessitating a solution for efficient resource allocation that allows UEs in these states to receive MBS transmissions without transitioning to RRC connected mode.
Innovation Solution
Configuring MBS resource sets, including MBS dedicated BWPs or frequency regions, allowing UEs in RRC idle or inactive states to receive MBS transmissions directly, with shared resources for multicast and broadcast services using MBS-specific CORESETs and BWPs, and updating 3GPP TSs to support these configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs require transition to RRC connected state to receive multicast/broadcast services, then service reception reliability is improved, but device complexity and service continuity are worsened due to mandatory state transitions
Solution Approach 1:
The patent segments the resource allocation mechanism by introducing separate RNTI types (MBS-RNTI, SI-RNTI, P-RNTI) for different service types and states. This allows UEs to receive multicast/broadcast services in both RRC connected and idle/inactive states using state-appropriate RNTIs, eliminating the need for mandatory state transitions while maintaining service reliability.
Solution Approach 2:
The patent implements dynamic RNTI configuration where the network can assign different RNTIs based on UE state and service requirements. UEs in RRC connected state use MBS-RNTI for multicast services, while UEs in idle/inactive states use SI-RNTI or P-RNTI, allowing flexible adaptation to different operational states without requiring state transitions.
2Adaptability or versatility
If dedicated MBS resource sets are configured for each UE state, then service accessibility is improved, but resource overhead increases
Solution Approach 1:
The patent creates a universal RNTI assignment framework where multiple RNTI types serve different purposes across different UE states. The same MBS resource set can be accessed by UEs in various states through different RNTIs, providing multi-functional access without requiring separate physical resource sets for each state, thus reducing resource overhead while maintaining accessibility.
Solution Approach 2:
The patent introduces RNTI as an intermediary layer between the UE and MBS resource sets. Instead of directly allocating resources to each UE state, the network uses RNTIs as mediators to grant access to MBS resources, simplifying resource management and reducing overhead while maintaining state-specific accessibility requirements.
3Productivity
If MBS services are transmitted on common frequency resources, then resource utilization efficiency is improved, but interference with unicast services increases
Solution Approach 1:
The patent segments frequency resources by introducing dedicated MBS frequency regions within the overall bandwidth. These MBS frequency regions are specifically allocated for multicast/broadcast services, separating them from unicast resources. This segmentation allows efficient MBS resource utilization while preventing interference with unicast services through frequency domain isolation.
Solution Approach 2:
The patent resolves the interference issue by transitioning from time-domain sharing to frequency-domain separation. Instead of multiplexing MBS and unicast services in time, the patent allocates specific frequency regions for MBS services, adding a frequency dimension to resource separation that eliminates mutual interference while maintaining high resource utilization efficiency.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for configuring and using multicast or broadcast services resource sets.