RRC-Inactive Multicast Reception with Configurable Access Control
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Solution Overview
Problem
Existing mobile communication systems face challenges in enabling multicast reception in a Radio Resource Control (RRC) inactive state, particularly in 5G NR networks, due to limitations in current technical specifications that only allow multicast sessions in the RRC connected state, leading to inefficient resource utilization and potential network congestion.
Innovation Solution
The proposed solution allows multicast reception in the RRC inactive state by using dedicated signaling for multicast configuration updates and enabling access control decisions based on network configuration, as well as prioritizing frequencies supporting multicast services during cell reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multicast reception is restricted to RRC connected state only, then network control and management is simplified, but resource utilization efficiency deteriorates and network congestion increases
Solution Approach 1:
The patent applies dynamics by enabling multicast reception in both RRC connected and inactive states, allowing the system to dynamically adapt to different operational scenarios. The UE can transition between states based on multicast service requirements, optimizing resource utilization while maintaining network control through configurable access control mechanisms.
Solution Approach 2:
The patent changes the state parameter from which multicast reception is permitted, expanding it from only RRC connected state to include RRC inactive state. This parameter change is controlled through network configuration parameters that determine access control behavior, allowing flexible adjustment between network control and resource efficiency.
2Manufacturing precision
If multicast configuration updates require RRC connection establishment, then configuration accuracy is ensured, but signaling load increases and access latency increases
Solution Approach 1:
The patent extracts the multicast configuration update function from the RRC connection establishment process. By allowing configuration updates to occur in the RRC inactive state, the patent separates the configuration update function from the full connection setup, reducing signaling load while maintaining configuration accuracy through dedicated signaling mechanisms.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multicast parameters and access control settings in the RRC inactive state before full connection establishment is needed. This allows the UE to be prepared for multicast reception without requiring immediate RRC connection setup, reducing access latency and signaling overhead.
3Productivity
If access control is applied for multicast configuration updates, then network congestion is reduced, but access speed decreases
Solution Approach 1:
The patent applies local quality by implementing differentiated access control based on the RRC state. In RRC inactive state, access control rules can be configured to allow or restrict multicast configuration updates locally without affecting overall network access control. This enables fine-grained control that maintains network throughput while allowing faster access for specific multicast-related operations.
Data Source
AI summary
A communication method executed by a user equipment in a mobile communication system for providing a Multicast/Broadcast Service (MBS) includes the steps of: performing multicast reception in a Radio Resource Control (RRC) inactive state based on a multicast configuration received from a network through dedicated signaling; determining to access the network for update of the multicast configuration in response to determination that the update is necessary; and determining whether to apply or skip access control for restricting the access, based on configuration information from the network.