5G MBS Control Channel Segmentation for Latency Optimization
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in providing efficient multicast broadcast services with enhanced service quality and reliability compared to LTE, particularly in managing diverse service quality requirements and minimizing latency.
Innovation Solution
The implementation of a communication control method in a 5G mobile communication system that configures multiple MBS control channels with different service quality requirements, allowing for optimized channel management and on-demand transmission, including unicast signaling for delay-sensitive services, to enhance service quality and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single MBS control channel is used for all services, then device complexity is reduced, but service quality requirements cannot be differentiated and latency cannot be optimized for delay-sensitive services
Solution Approach 1:
The patent divides the MBS control channel into multiple separate channels, each dedicated to specific service types (e.g., delay-sensitive services, delay-tolerant services). This segmentation allows each channel to be optimized for its specific service requirements, improving reliability while managing complexity through functional separation.
Solution Approach 2:
The patent implements dynamic channel selection where the base station and user equipment can adaptively choose appropriate MBS control channels based on service quality requirements and current network conditions. This dynamic approach enables optimization for different service types without requiring all channels to be always active, balancing reliability with complexity.
2Reliability
If broadcast control channel is used for MBS system information, then coverage is extended, but latency increases for delay-sensitive services requiring immediate information delivery
Solution Approach 1:
The patent segments information delivery into two paths: broadcast control channel for general MBS system information (extending coverage) and unicast control channel for delay-sensitive service information (reducing latency). This segmentation allows each transmission method to be used for its most appropriate application.
Solution Approach 2:
The patent introduces unicast control channels as an intermediary mechanism for delay-sensitive services, bypassing the slower broadcast mechanism when immediate information delivery is required. This intermediary path enables direct, low-latency communication between base station and specific user equipment.
3Reliability
If multiple MBS control channels with different service quality requirements are transmitted, then service quality and latency are optimized, but device complexity and resource consumption increase
Solution Approach 1:
The patent implements dynamic channel management where user equipment and base stations adaptively select and activate only the MBS control channels necessary for their specific service requirements. This dynamic approach reduces the effective complexity for each device while maintaining multiple channels in the system for different service types.
Solution Approach 2:
The patent applies local quality by configuring different MBS control channels with specific properties optimized for local service requirements (e.g., delay-sensitive vs. delay-tolerant). Each channel has tailored characteristics matching its intended service, reducing the need for complex universal configuration while improving service quality.
4Loss of time
If unicast transmission is used for MBS control information, then latency is reduced for delay-sensitive services, but resource consumption increases compared to broadcast
Solution Approach 1:
The patent segments information transmission into broadcast (for general information) and unicast (for delay-sensitive information), allocating resources appropriately to each. This segmentation ensures that unicast resources are used only when necessary for low-latency requirements, minimizing overall resource consumption while achieving latency reduction where needed.
Solution Approach 2:
The patent applies partial unicast action only to the extent necessary for delay-sensitive services, rather than using unicast for all MBS control information. This partial application of unicast transmission reduces latency for critical services while avoiding the excessive resource consumption that would result from universal unicast deployment.
Data Source
AI summary
A first aspect provides a communication control method used in a mobile communication system including a base station for providing a multicast broadcast service (MBS) to a user equipment, the communication control method including transmitting, by the base station configured to manage a cell, in the cell, a plurality of MBS control channels associated with respective different service quality requirements, and receiving, by the user equipment, an MBS control channel of the plurality of MBS control channels corresponding to a service quality requirement of the different service quality requirements requested by the user equipment.