NR MBMS Indication for Dynamic Scheduling and Beam Management
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Solution Overview
Problem
The challenge in new radio (NR) systems is to support groupcast and broadcast services in scenarios like Internet of vehicles and industrial Internet, requiring dynamic scheduling adjustments and beam management for multimedia broadcast multicast services (MBMS), while ensuring transmission reliability and efficiency.
Innovation Solution
An information indication method and apparatus that includes receiving and sending first indication information to manage MBMS services, involving HARQ feedback, CSI reporting, and beam management, using a new SIB to configure MCCH and MTCH channels, and adjusting scheduling parameters based on CSI and beam measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MBMS services are introduced into NR system to support groupcast and broadcast scenarios, then service coverage and application scenarios are improved, but system complexity and scheduling management difficulty increase
Solution Approach 1:
The patent segments MBMS service management into distinct components: service announcement messages for broadcast services, separate indication information for groupcast services, and differentiated handling for connected-state terminal devices. This segmentation allows independent optimization of each service type, reducing overall system complexity while maintaining versatility.
Solution Approach 2:
The patent creates a universal indication mechanism that can handle multiple service types (broadcast and groupcast) and multiple terminal states (idle and connected) through a unified message structure and processing framework. This multi-functionality approach reduces the need for separate management systems for each service type, thereby reducing complexity while maintaining broad adaptability.
2Productivity
If dynamic scheduling adjustment is implemented for MBMS services, then transmission efficiency is improved, but signaling overhead and system resource consumption increase
Solution Approach 1:
The patent implements partial dynamic scheduling by applying dynamic adjustments only to specific MBMS services that require it, rather than all services uniformly. The network device sends indication information selectively for services needing scheduling changes, and terminal devices perform measurements and adjustments only when indicated. This partial action approach maintains transmission efficiency for critical services while minimizing unnecessary signaling overhead.
Solution Approach 2:
The patent establishes feedback mechanisms where terminal devices measure channel conditions (CSI) and provide feedback to the network device, which then adjusts scheduling parameters accordingly. This closed-loop feedback enables efficient dynamic scheduling adjustments based on actual channel conditions, improving transmission efficiency while optimizing signaling overhead by triggering adjustments only when performance degradation is detected.
3Reliability
If beam management is added to MBMS services in NR system, then transmission reliability is improved, but processing complexity and measurement requirements increase
Solution Approach 1:
The patent applies beam management selectively to specific MBMS services and specific terminal devices based on their requirements. The network device determines which terminal devices need beam management for which services, and configures beam parameters locally for each case. This localized approach improves transmission reliability for services requiring beamforming while avoiding unnecessary processing complexity for services that do not benefit from beam management.
Solution Approach 2:
The patent implements preliminary beam configuration where the network device pre-configures beam parameters and indication information before MBMS service transmission begins. Terminal devices receive and store these configurations in advance, preparing measurement and reporting mechanisms beforehand. This preliminary action reduces real-time processing complexity during actual service delivery while maintaining high transmission reliability through pre-optimized beam settings.
Data Source
AI summary
Embodiments of the present disclosure provide an information indication method and apparatus, a terminal device and a network device, the method includes: a terminal device receives first indication information sent by a network device, where the first indication information is used to indicate at least one of the following: a first MBMS service requiring to be received by a connected-state terminal device; a first MBMS service requiring HARQ feedback to be performed; a first MBMS service requiring CSI reporting to be performed; or a first MBMS service requiring beam management to be performed.