Dynamic MBMS Resource Allocation in Single-Cell Multi-Transmission
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Solution Overview
Problem
Current mobile communication networks face inefficiencies in transmitting and receiving multi-transmission data to multiple UEs within a single cell, particularly due to static MBMS areas that occupy entire system bandwidth and cannot be dynamically adjusted, leading to inefficient resource use and service interruptions when UEs move between cells.
Innovation Solution
A method and apparatus for dynamic transmission and reception of multi-transmission data through PDSCH, involving UE and eNB systems that transmit and receive MBMS interest information messages upon RRC connection or changes in group communication service information, allowing for efficient use of radio resources and minimizing service interruptions during cell movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MBMS occupies entire system bandwidth with static predetermined nonadjustable area, then group communication service is provided, but transmission efficiency deteriorates due to inability to dynamically adjust according to user distribution and traffic load
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms for MBMS transmission parameters including transport block size, resource allocation, and modulation and coding scheme based on channel conditions and traffic load. The eNB dynamically selects transmission parameters from predefined tables and adjusts them according to feedback from UEs, transforming the static MBMS system into a dynamic one that adapts to changing conditions while maintaining group communication service
Solution Approach 2:
The patent changes multiple transmission parameters including transport block size (TB size), resource block allocation, modulation order, and coding rate to optimize MBMS transmission efficiency. These parameters are adjusted based on channel quality indicators, traffic load, and UE distribution, allowing the system to adapt without changing the fundamental MBMS architecture
2Loss of energy
If MBMS uses static predetermined nonadjustable area, then service coverage is maintained, but resource utilization deteriorates when not all radio resources are used
Solution Approach 1:
The patent implements partial resource allocation where only the necessary portion of system bandwidth is allocated to MBMS transmission based on actual traffic load and UE distribution. Instead of occupying the entire system bandwidth, the eNB dynamically determines the optimal resource allocation, using partial resources when sufficient and expanding when needed, thereby improving resource utilization efficiency while maintaining adequate service coverage
3Adaptability or versatility
If unicast and multiplexing are not allowed in the same subframe for MBMS, then transmission simplicity is maintained, but system flexibility deteriorates
Solution Approach 1:
The patent segments the transmission framework into distinct layers: physical layer resources, transport block structure, and logical channel multiplexing. This segmentation allows unicast and MBMS multiplexing to coexist in the same subframe by allocating different resource blocks and using appropriate multiplexing schemes, increasing system flexibility without creating unmanageable complexity through structured resource division
4Productivity
If MBMS occupies entire system bandwidth, then service availability is ensured, but transmission efficiency deteriorates due to static resource allocation
Solution Approach 1:
The patent implements dynamic resource allocation where the quantity of radio resources allocated to MBMS varies based on traffic load, channel conditions, and UE distribution. The eNB continuously adjusts the allocated bandwidth and resource blocks, ensuring sufficient resources for service availability while optimizing transmission efficiency by avoiding static over-allocation
Data Source
AI summary
Provided are a method and an apparatus for providing point-to-multipoint transmission in a single cell in E-UTRAN. The method may include receiving system information for single-cell multi-transmission in a primary cell (PCell); determining whether to transmit a multimedia broadcast multicast service (MBMS) interest information message; and transmitting the MBMS interest information message, wherein the MBMS interest information message is determined to be transmitted when the terminal sets an RRC connection or when interest group communication service information of the previous interest information message, which the terminal transmitted last, has been changed.