MBS-DCD Message Management for Multicast Service Macro Diversity
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Solution Overview
Problem
Current multicast and broadcast services in mobile networks face inefficiencies due to the need for continuous tracking of DL-MAP messages, leading to increased power consumption and unsuitable resource utilization, especially for users at the edge of cells where macro diversity is required.
Innovation Solution
The introduction of an MBS-DCD message within the MBS ZONE, managed by the MBS Server, and enhancements to the MBS-MAP message to indicate DCD message updates, allowing mobile stations to determine when to receive new DCD messages, thereby reducing the need for continuous DL-MAP message tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile stations continuously track DL-MAP messages to receive multicast service parameter updates, then service reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by introducing a discontinuous reception mechanism where mobile stations wake up at predetermined intervals to check for MBS parameter updates instead of continuously monitoring. The network sends wake-up signals periodically, and MSs only activate their receivers during these scheduled intervals, transforming continuous power-consuming monitoring into periodic low-power operation while maintaining service reception reliability.
Solution Approach 2:
The patent applies self-service by enabling mobile stations to autonomously determine whether to wake up for parameter updates based on stored configuration information and local decision-making logic. Each MS independently manages its own reception schedule, deciding when to activate based on whether updates are expected, thereby eliminating the need for continuous network-controlled monitoring and reducing overall system power consumption.
2Measurement precision
If mobile stations continuously monitor DL-MAP messages, then modulation and coding mode accuracy is improved, but resource utilization deteriorates
Solution Approach 1:
The patent implements periodic action by introducing a discontinuous reception mechanism where mobile stations wake up at predetermined intervals to check for MBS parameter updates instead of continuously monitoring. The network sends wake-up signals periodically, and MSs only activate their receivers during these scheduled intervals, transforming continuous power-consuming monitoring into periodic low-power operation while maintaining service reception reliability.
Solution Approach 2:
The patent applies self-service by enabling mobile stations to autonomously determine whether to wake up for parameter updates based on stored configuration information and local decision-making logic. Each MS independently manages its own reception schedule, deciding when to activate based on whether updates are expected, thereby eliminating the need for continuous network-controlled monitoring and reducing overall system power consumption.
3Area of stationary object
If DL-MAP messages are used for MBS parameter notification, then service coverage is improved, but system complexity increases
Solution Approach 1:
The patent applies the extraction principle by separating MBS parameter notification from the general DL-MAP messaging framework. A dedicated MBS-MAP message type is extracted and defined, with specific information elements for MBS parameters. This specialization simplifies the overall system by providing targeted notification mechanisms for MBS services, reducing the complexity of handling general-purpose DL-MAP messages for this specific function while maintaining broad service coverage.
Solution Approach 2:
The patent introduces an intermediary mechanism through the MBS-MAP message that acts as a specialized mediator between the network and mobile stations for MBS parameter communication. This intermediary structure simplifies the interaction by providing a dedicated protocol layer for MBS services, reducing the complexity of using general DL-MAP messages for MBS-specific notifications while ensuring comprehensive service coverage.
Data Source
AI summary
The invention discloses a method, a system and apparatus for providing modulation and coding mode used by multicast service macro diversity. In this method, a message containing relevant information of modulation and coding mode(s) used by an MBS zone is sent in the MBS zone at first; the MS receives the message, analyzes other messages in the MBS zone according to the relevant information of the modulation and coding mode(s) contained in this message, and receives MBS service data according to the analyzed result upon other messages in the MBS zone. The invention resolves the problem that an entity is required to uniformly manage the coding and modulation mode definition of each cell in the prior art, as well as the problem that the DCD count in the DL-MAP message has to be continuously tracked in the prior art.