PHY Frame Symbol Count Calculation for IEEE 802.11ah Aggregation
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Solution Overview
Problem
Existing wireless communication technologies face challenges in determining the number of symbols in a data field of a frame, particularly in the context of IEEE 802.11ah, where aggregation is used, leading to inefficiencies in data transmission and reception.
Innovation Solution
The method involves calculating the number of data symbols in a frame based on parameters such as APEP_LENGTH, PSDU_LENGTH, and coding schemes like BCC and LDPC, using equations specific to aggregation and non-aggregation scenarios, to accurately determine the number of symbols in the data field for both transmitting and receiving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aggregation is used in IEEE 802.11ah frames, then data transmission efficiency is improved, but determining the number of symbols in the data field becomes complex and error-prone
Solution Approach 1:
The patent applies preliminary action by pre-defining the relationship between aggregation parameters (APEP_LENGTH, PSDU_LENGTH) and symbol count through standardized equations. The system pre-establishes the mapping between aggregation configuration and resulting symbol numbers, eliminating the need for complex runtime calculations and reducing determination errors.
Solution Approach 2:
The patent utilizes parameter changes by introducing specific parameters (APEP_LENGTH, PSDU_LENGTH, coding scheme indicators) that directly determine symbol count through defined equations. By changing these parameters based on aggregation configuration, the system dynamically adjusts symbol determination without increasing overall complexity.
2Adaptability or versatility
If different coding schemes (BCC, LDPC) are supported, then adaptability is improved, but measurement precision of symbol count deteriorates
Solution Approach 1:
The patent applies local quality by providing different specialized equations for different coding schemes (BCC-specific equations, LDPC-specific equations). Each coding scheme has its own tailored calculation method that accounts for its specific characteristics, ensuring precise symbol count determination for each scheme while maintaining overall system adaptability.
3Adaptability or versatility
If aggregation parameters (APEP_LENGTH, PSDU_LENGTH) are used, then data transmission flexibility is improved, but calculation complexity for symbol determination increases
Solution Approach 1:
The patent applies parameter changes by establishing direct mathematical relationships between aggregation parameters (APEP_LENGTH, PSDU_LENGTH) and symbol count through defined equations. This allows the system to flexibly adjust transmission parameters while maintaining relatively simple calculations based on pre-defined formulas rather than complex algorithms.
Data Source
AI summary
A method for determining a number of symbols in a data field of a physical layer (PHY) protocol data unit (PPDU) is described. The method includes determining, by a wireless transmitting device, whether an aggregation subfield of a signal field of the PPDU is to be set to 1 and responsive to determining that the aggregation subfield of the signal field of the PPDU is not to be set to 1, calculating, by the wireless transmitting device, the number of symbols in the data field of the PPDU based on a PHY service data unit (PSDU) length value, wherein the PSDU length value is provided in a transmission vector (TXVECTOR) and the TXVECTOR also includes an aggregated media access control (MAC) protocol data unit pre-end-of-frame padding (APEP) length value of the PPDU.