OFDM Data Fragmentation Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially those using Multi-band Orthogonal Frequency Division Multiplexing (MBOFDM), the transmission of incomplete data packets requires padding with useless 'filler' data, reducing efficiency and throughput due to the need for full packet lengths aligned with OFDM symbol boundaries.
Innovation Solution
A system that optimizes data fragmentation by calculating the minimum number of pad bits required for transmission, using a fragmentation construct that determines optimal packet lengths based on system parameters, minimizing overhead and maximizing throughput, adaptable to various design requirements and components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data packets are padded to align with OFDM symbol boundaries, then transmission reliability is improved, but transmission efficiency deteriorates due to unnecessary pad bits
Solution Approach 1:
The data stream is segmented into multiple packets, each carefully sized to align with OFDM symbol boundaries. The system divides the original data into optimal segments that fit exactly into transmission frames without requiring padding, thus maintaining reliability while improving efficiency.
Solution Approach 2:
The packetization scheme dynamically adjusts packet sizes based on the available data and transmission parameters. Rather than using fixed packet sizes that may require padding, the system dynamically determines optimal packet boundaries to eliminate pad bits while ensuring complete data transmission.
2Device complexity
If fixed packet lengths aligned with OFDM symbols are used, then system complexity is reduced, but data transmission efficiency deteriorates due to pad bits
Solution Approach 1:
The system performs preliminary calculations to determine optimal packet sizes before actual transmission. By pre-calculating the exact packet boundaries that align with OFDM symbols and fit the available data, the system eliminates the need for padding while maintaining straightforward transmission protocols.
Solution Approach 2:
The system changes the packet length parameter dynamically based on the data size and transmission requirements. Instead of using a fixed packet length that may require padding, the packet length parameter is adjusted to perfectly match the available data while maintaining alignment with OFDM symbol boundaries.
3Stability of the object's composition
If complete OFDM symbol packets are transmitted, then transmission stability is improved, but power consumption increases due to transmitting filler data
Solution Approach 1:
The system extracts and transmits only the essential data portions that fit into complete OFDM symbol packets. By removing the unnecessary pad bits (filler data) through careful packet boundary calculation, the system maintains transmission stability while reducing power consumption associated with transmitting useless data.
Data Source
AI summary
The present invention provides a versatile system for optimizing data fragmentation in a digital communications—particularly OFDM communications—system. A digital transmission system (100) is provided, having a PHY-level constraint. An array (104, 112) of data transmission parameters (106-110, 114-116), relating to the digital transmission system, is provided. A fragmentation construct (102) is provided, and adapted to determine a number of symbols required to transmit a given data transmission payload. The fragmentation construct calculates (118), based on the number symbols required, and on certain parameter information from the array, a number of bytes of data that must be transmitted in the given data transmission payload in order to minimize pad bits added to the data transmission payload.