Multicast Reception in RRC Inactive State With Quality-Triggered Resume
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Solution Overview
Problem
Existing wireless communication systems, such as 5G NR, face challenges in efficiently supporting multicast data reception in the RRC inactive state, leading to increased power consumption, signaling overhead, and potential service disruptions due to the requirement for UEs to remain in the RRC connected state, which affects network capacity and mobility.
Innovation Solution
A method and device for multicast data reception in the RRC inactive state, where a UE receives a suspend configuration indicating allowed multicast sessions, monitors reception quality, and triggers an RRC connection resume if quality falls below a threshold or if valid configurations are absent, allowing for power-efficient and seamless service continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs remain in RRC connected state to receive multicast data, then reception quality is maintained, but power consumption increases and network capacity decreases
Solution Approach 1:
The patent implements dynamic state transition for UE, allowing switching between RRC connected and RRC inactive states based on multicast reception needs. The network can configure UEs to transition to inactive state for multicast reception, reducing power consumption while maintaining service continuity through conditional resume procedures when quality thresholds are breached.
2Use of energy by moving object
If UEs transition to RRC inactive state for multicast reception, then power consumption is reduced, but reception quality may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where UEs monitor multicast reception quality in RRC inactive state and compare it against configured thresholds. When quality deteriorates below the threshold, the UE triggers an RRC connection resume procedure to restore service, ensuring quality requirements are met while minimizing power consumption during normal operation.
3Reliability
If UEs frequently resume RRC connection for quality maintenance, then reception quality is ensured, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by configuring quality thresholds and resume conditions in advance during the RRC inactive state setup. The network pre-configures UEs with thresholds and parameters needed for quality monitoring, enabling UEs to make autonomous decisions about when to resume connections, thereby reducing unnecessary signaling overhead while ensuring quality maintenance only when truly needed.
Data Source
AI summary
Methods and devices for multicast data reception are provided. A method perform by a user equipment (UE) includes receiving, from a base station (BS), a radio resource control (RRC) release message including a suspend configuration, the suspend configuration allowed to be received by the UE in an RRC inactive state; receiving first data of a first multicast session of the at least one multicast session in the RRC inactive state based on a first configuration that is associated with the first multicast session and that is included in the RRC release message; determining whether a reception quality of the first data of the first multicast session is lower than a first threshold; and triggering an RRC connection resume procedure in case that the reception quality of the first data of the first multicast session is lower than the first threshold.