Multicast Reception Access Control in RRC Inactive State
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Solution Overview
Problem
In the RRC inactive state, terminal devices do not provide feedback on multicast reception quality, leading to poor quality issues that the base station cannot timely address, and existing methods lack efficient mechanisms for ensuring quality and avoiding unnecessary connection resumptions.
Innovation Solution
The terminal device initiates a connection resume process when necessary to return to the connected state based on predefined conditions, such as measurement thresholds and cell reselection processes, ensuring multicast service quality while minimizing unnecessary access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device is released to the RRC inactive state to receive multicast data, then network congestion is relieved and energy is saved, but the base station cannot timely sense and adjust the received quality
Solution Approach 1:
The patent introduces a feedback mechanism where the terminal device in RRC inactive state periodically reports multicast reception quality metrics (such as RSRP, RSRQ, or BLER) to the base station. This feedback enables the base station to sense and adjust the received quality in a timely manner while keeping the terminal in the energy-saving inactive state, thus resolving the contradiction between network efficiency and service quality.
Solution Approach 2:
The base station pre-configures the terminal device with quality thresholds and reporting parameters before releasing it to the inactive state. The terminal device then proactively monitors and reports when quality deteriorates, allowing the base station to take preliminary actions to maintain quality without requiring continuous connected state monitoring.
2Reliability
If the terminal device continuously monitors multicast quality in the inactive state, then received quality can be ensured, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the terminal device performs periodic quality assessments at predetermined intervals or triggered by specific events (such as quality threshold violations). This periodic action ensures quality monitoring while significantly reducing energy consumption compared to continuous monitoring in the inactive state.
Solution Approach 2:
The terminal device autonomously monitors its own reception quality and determines when reporting is necessary based on pre-configured thresholds. This self-service approach eliminates the need for continuous network-side polling, reducing both terminal energy consumption and network signaling overhead.
3Reliability
If the terminal device initiates connection resume frequently to ensure quality, then multicast received quality is improved, but network resource utilization decreases
Solution Approach 1:
The periodic feedback mechanism allows the base station to identify specific terminals experiencing quality issues and trigger connection resume only for those terminals. This targeted approach ensures quality improvement while minimizing unnecessary connection resumptions, thereby maintaining high network resource utilization.
Solution Approach 2:
The patent dynamically adjusts quality thresholds and reporting frequencies based on terminal-specific conditions and network state. By adapting parameters such as reporting intervals and quality thresholds, the system optimizes the balance between quality assurance and network resource efficiency, reducing unnecessary connection resumptions.
Data Source
AI summary
A communication method may include: entering a first state, where the first state is a radio resource control inactive state or a radio resource control idle state; receiving multicast data in the first state; and determining, based on a first condition and/or a cell reselection process, whether to initiate access.