Transmitting Apparatus Switching Localized and Distributed Frequency Blocks
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Solution Overview
Problem
Current transmission systems are inadequate in supporting both localized and distributed type transmissions across varying movement speeds and data sizes, failing to efficiently manage large and small data packets effectively.
Innovation Solution
A transmission apparatus that switches between localized and distributed type transmissions in a time division manner, using a frequency scheduling unit, distributed pattern assignment unit, and control unit to assign frequency blocks and subcarriers, allowing for flexible data mapping and switching between transmission types within subframes or frequency blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transmission system supports both localized and distributed type transmissions, then adaptability to different movement speeds and data sizes is improved, but device complexity increases
Solution Approach 1:
The system dynamically switches between localized and distributed type transmissions based on movement speed and data size conditions. The transmission type is not fixed but adapts in real-time to channel conditions and traffic requirements, allowing the system to optimize performance for different scenarios without requiring separate dedicated systems for each transmission type.
Solution Approach 2:
A single transmission system is designed to perform multiple functions by supporting both localized and distributed transmission types. The system can function as a localized transmission system when frequency scheduling is beneficial, and as a distributed transmission system when frequency diversity is needed, thereby eliminating the need for separate specialized systems.
2Productivity
If localized type transmission is used for large data sizes, then frequency scheduling effect is improved, but flexibility for high-speed movement is worsened
Solution Approach 1:
The system dynamically adjusts the transmission type based on movement speed conditions. For stationary or low-speed users, localized transmission with frequency scheduling is used to maximize spectral efficiency. For high-speed moving users, the system switches to distributed transmission that provides frequency diversity without relying on precise frequency scheduling, thus adapting to the changing channel conditions caused by movement.
3Reliability
If distributed type transmission is used for small data sizes, then frequency diversity effect is improved, but efficiency for large data transmissions is worsened
Solution Approach 1:
The system dynamically selects the appropriate transmission type based on data size requirements. For small data transmissions such as VoIP, distributed transmission is used to provide robust frequency diversity and ensure reliable delivery. For large data transmissions, the system switches to localized transmission that enables efficient frequency scheduling and maximizes throughput, thus optimizing performance for different data size scenarios.
Data Source
AI summary
The object is achieved by providing a transmission apparatus with: assignment means configured to assign, to each user, one of a frequency block that is obtained by dividing a system bandwidth into each block of continuous frequency subcarriers and a distributed type frequency block that include a frequency subcarrier that is discretely distributed in the system bandwidth; and mapping means configured to assign transmission data to one of the frequency block and the distributed type frequency block according to the assignment.