MBSFN Zone Sub-Zoning for Wireless Data Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in providing efficient multicast broadcast services, particularly in maintaining quality and resource allocation when transmitting both multicast and unicast data simultaneously, which can lead to standardized performance degradation in multicast broadcast single frequency network (MBSFN) zones.
Innovation Solution
The method involves dividing the MBSFN zone into sub-zones, allowing cells to transmit superposed multicast and unicast data using different code sets and pilot structures, enabling adaptive modulation and coding schemes to improve performance, especially for edge cells and cells across adjacent zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed modulation and coding scheme is applied throughout the MBSFN zone, then service continuity and macro-diversity gain are maintained, but overall performance is standardized downward especially at cell edges
Solution Approach 1:
The patent divides the MBSFN zone into sub-zones and applies different modulation and coding schemes to different sub-zones based on local channel conditions. Edge cells use more robust modulation while central cells use higher throughput modulation, allowing each region to optimize its performance independently while maintaining overall service continuity.
Solution Approach 2:
The patent segments the MBSFN zone into multiple sub-zones with different transmission characteristics. This segmentation allows the system to treat edge cells and central cells differently, applying adaptive modulation and coding schemes to each segment rather than using a uniform approach across the entire zone.
2Productivity
If multiple cells transmit MBS data simultaneously in an MBSFN zone, then resource efficiency is improved, but interference between cells increases especially at cell edges
Solution Approach 1:
The patent applies different transmission parameters to different sub-zones based on their specific interference conditions. Edge cells that experience higher interference use more robust modulation and coding schemes, while central cells with lower interference use higher throughput modes, optimizing the trade-off between resource efficiency and interference management for each local region.
Solution Approach 2:
The patent dynamically adjusts transmission parameters such as modulation order and coding rate for different sub-zones based on their channel conditions and interference levels. This parameter adaptation allows the system to maintain high resource efficiency while managing interference through localized optimization rather than uniform transmission across the entire MBSFN zone.
3Device complexity
If the MBSFN zone is treated as a single homogeneous region, then system complexity is reduced, but performance optimization for different cell types is limited
Solution Approach 1:
The patent segments the MBSFN zone into sub-zones with different transmission characteristics while maintaining a relatively simple overall system architecture. This segmentation approach enables performance optimization for different cell types without requiring complete redesign of the system, balancing complexity and optimization needs.
Solution Approach 2:
The patent introduces dynamic adaptation capabilities within the segmented sub-zones, allowing the system to adjust modulation and coding schemes based on real-time channel conditions. This dynamic approach enables performance optimization without requiring complex static configuration for every possible scenario, maintaining system flexibility while improving productivity.
Data Source
AI summary
A data transmission method and apparatus in a wireless communication system is provided. The data transmission method include dividing a multicast broadcast single frequency network (MBSFN) zone including a plurality of cells into at least one sub-zone including at least one cell, enabling a plurality of cells belonging to the MBSFN zone to transmit first multicast broadcast service (MBS) data, and enabling the cell belonging to the at least one sub-zone to transmit sub-zone data superposed with the first MBS data, wherein the sub-zone data is second MBS data.