Wireless Network IC Integer Data Bits Per Symbol
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Solution Overview
Problem
Existing wireless personal area networks (WPANs) face inefficiencies due to non-integer numbers of data bits per OFDM symbol, which can disrupt communication efficiency in smart utility networks, particularly in utility metering applications where reliable and low-power communication is crucial.
Innovation Solution
The implementation of an integrated circuit and machine-readable storage medium that support smart-utility-network communication using an integer number of data bits per symbol across various IFFT sizes, ensuring efficient data transfer by adjusting modulation coding schemes, pilot subcarriers, and oversampling to maintain reliable and low-power communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-integer numbers of data bits per OFDM symbol are used, then communication flexibility is improved, but communication reliability deteriorates
Solution Approach 1:
The patent changes the parameter of data bits per OFDM symbol from non-integer to integer values. This is achieved by adjusting modulation coding schemes (MCS), pilot subcarriers, and oversampling factors to ensure that the total number of data bits per symbol is always an integer, thereby resolving the contradiction between flexibility and reliability.
2Adaptability or versatility
If various IFFT sizes are supported, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic support for multiple IFFT sizes (128, 64, 32, 16, and 8) by making the system configurable to adapt to different communication scenarios. The integrated circuit is designed to dynamically adjust between different IFFT sizes based on channel conditions and communication requirements, balancing adaptability with manageable complexity through efficient resource allocation.
3Reliability
If oversampling is applied, then signal quality is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the oversampling factor as a configurable parameter that can be adjusted based on channel conditions. By dynamically changing the oversampling parameter, the system achieves improved signal quality when needed while minimizing energy consumption during normal operation, thus resolving the contradiction between signal quality and energy efficiency.
Data Source
AI summary
A integrated circuit includes logic configured to support smart-utility-network communication using an integer number of data bits per symbol for 96, 48, 24, 12, and 4 data subcarriers across IFFT sizes of 128, 64, 32, 16, and 8.