OFDMA Segment Classification for Dynamic Scheme Selection
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Solution Overview
Problem
4G mobile communication systems face challenges in maximizing subscriber capacity and providing high-speed transmission due to limitations in radio resources and channel changes caused by fading, interference, and multi-path signals, despite the use of adaptive modulation and coding schemes.
Innovation Solution
A method for transmitting and receiving data using differential combinations of signal transmitting and receiving schemes in an OFDMA mobile communication system, where the frequency band is divided into sub-carrier frequency bands and segments are classified based on data characteristics, QoS, and channel quality, allowing for dynamic selection of optimal transmission and reception schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single signal transmitting and receiving scheme is used for all data, then the system is simple to operate, but transmission efficiency cannot be maximized under varying channel conditions
Solution Approach 1:
The patent implements dynamic selection of signal transmitting and receiving schemes based on real-time channel conditions and data characteristics. The system transitions from static single-scheme operation to dynamic multi-scheme selection, adapting modulation and coding parameters according to varying fading conditions, interference levels, and data requirements to maximize transmission efficiency.
Solution Approach 2:
The patent changes key transmission parameters including modulation order, coding rate, and resource allocation based on channel quality indicators and data characteristics. By dynamically adjusting these parameters, the system optimizes transmission performance for different channel conditions while maintaining manageable complexity through parameterized scheme selection.
2Reliability
If adaptive modulation and coding schemes are used to cope with channel changes, then transmission reliability is improved, but subscriber capacity and high-speed transmission are still limited by radio resources
Solution Approach 1:
The patent segments the frequency band into multiple sub-carrier frequency bands and divides data into different types (e.g., voice, data, video) with different QoS requirements. By segmenting both the spectrum and data streams, the system can apply different transmission schemes to different segments, maximizing resource utilization and subscriber capacity while maintaining reliability through appropriate scheme selection for each segment.
Solution Approach 2:
The patent applies different signal transmitting and receiving schemes to different sub-carrier bands and data types based on local channel conditions and data characteristics. Instead of uniform treatment, each segment receives optimized transmission parameters matched to its specific requirements, enabling high subscriber capacity while maintaining reliability through localized optimization.
3Productivity
If the entire frequency band is used for all data transmissions, then resource allocation is simple, but spectrum efficiency and transmission quality deteriorate under fading and interference
Solution Approach 1:
The patent divides the entire frequency band into multiple sub-carrier frequency bands and allocates different segments to different data types based on channel conditions. This segmentation enables frequency diversity and allows the system to exploit favorable channel conditions in specific frequency bands, significantly improving spectrum efficiency while managing allocation complexity through systematic segment management.
Solution Approach 2:
The patent dynamically changes resource allocation parameters including sub-carrier assignment, power distribution, and modulation order across different frequency segments. By adjusting these parameters according to channel quality and data requirements, the system maximizes spectrum efficiency while maintaining tractable resource allocation through parameterized control.
4Productivity
If differential combinations of signal transmitting and receiving schemes are implemented according to data characteristics, then transmission efficiency is enhanced, but system complexity increases
Solution Approach 1:
The patent implements dynamic scheme selection based on real-time assessment of channel conditions and data characteristics. The system automatically adapts transmission and reception parameters without manual intervention, achieving high transmission efficiency while maintaining ease of operation through automated dynamic adjustment rather than static manual configuration.
Solution Approach 2:
The system performs self-configuration by automatically selecting appropriate transmission and receiving schemes based on embedded channel quality measurements and data type identification. This self-service capability eliminates the need for complex manual operation while achieving optimized transmission efficiency through automated adaptation to varying conditions.
Data Source
AI summary
A method for transmitting data in a mobile communication system using an OFDMA scheme. The method includes dividing an entire frequency band of the mobile communication system into a plurality of sub-carrier frequency bands, generating a plurality of segments each of the plurality of segments having a preset number of sub-frequency bands and a preset number of time intervals, and each of the plurality of segments having a frequency domain and a time domain, classifying the plurality of segments into multiple types of segments in consideration of data characteristics, determining combinations of signal transmitting and receiving schemes to be applied to each of the type of segments in consideration of the data characteristics, and selecting one of the multiple types of segments for transmitting data in consideration of the data characteristics when the data is generated for transmission.