Multi-phy Synchronized Diversity Receiver Pilot Prefix Mode Detection
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Solution Overview
Problem
Current communication mode switching mechanisms in networks are inefficient due to the need for a mode switch header transmitted at a low data rate, which reduces overall transmission efficiency and requires longer times compared to payload data transmission.
Innovation Solution
A system where a transmitting node generates data packets with a pilot prefix of predetermined frequency and a preamble, allowing a receiving node to detect the communication mode by cycling through supported modes based on descending data rates, enabling efficient synchronization and mode detection within a fraction of the time required for existing mode switch headers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mode switch header is transmitted at a low data rate to indicate the communication mode, then the receiving node can identify the communication mode, but the transmission efficiency is significantly reduced
Solution Approach 1:
The patent applies preliminary action by transmitting the communication mode information in advance through the pilot prefix before the actual data transmission begins. The pilot prefix contains mode indication information that allows the receiving node to identify the communication mode ahead of time, eliminating the need to transmit mode switch headers during the data transmission phase. This resolves the contradiction by achieving accurate mode identification without sacrificing transmission efficiency.
Solution Approach 2:
The patent extracts the mode indication information from the main data transmission stream and places it in the pilot prefix portion. By separating the mode identification function from the data payload, the system can identify communication modes using the pilot prefix without requiring additional mode switch headers that would reduce overall transmission efficiency. This extraction principle resolves the contradiction between accurate mode identification and transmission efficiency.
2Ease of operation
If a mode switch header is transmitted to indicate the communication mode, then the receiving node can switch to the correct mode, but the time required for mode switching is significantly increased
Solution Approach 1:
The patent applies preliminary action by embedding mode indication information in the pilot prefix that is transmitted before the main data payload. The receiving node can identify the communication mode during the pilot prefix reception phase, which occurs before actual data transmission. This eliminates the time delay associated with transmitting and processing mode switch headers during data transmission, thereby reducing mode detection time while maintaining ease of mode switching.
Solution Approach 2:
The patent enables the receiving node to skip the time-consuming process of transmitting and decoding mode switch headers by using the pilot prefix for rapid mode identification. The mode indication information in the pilot prefix allows the receiving node to quickly determine the communication mode and switch to the correct configuration without waiting for separate mode indication transmissions, thus reducing mode detection time while maintaining operational simplicity.
3Adaptability or versatility
If nodes support multiple communication modes with different hardware configurations, then communication flexibility is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the receiving node to automatically identify and adapt to the transmitting node's communication mode through the mode indication information in the pilot prefix. The receiving node cycles through its supported communication modes to detect the correct one without requiring complex manual configuration or additional negotiation protocols. This automatic self-configuration maintains communication flexibility while reducing the operational complexity of managing multiple hardware configurations.
Solution Approach 2:
The patent uses parameter changes by encoding communication mode information in the pilot prefix, allowing the receiving node to adjust its operational parameters based on the detected mode. The mode indication information specifies parameters such as data rate, modulation scheme, and coding rate, enabling the receiving node to dynamically change its configuration to match the transmitting node's settings. This parameter-based adaptation maintains versatility while managing hardware configuration complexity through systematic parameter adjustment.
Data Source
AI summary
A system for determining a communication mode utilized by a transmitting node to transmit a data packet in a mesh network is provided. For example, a receiving node operates in a base communication mode to detect a pilot p of a data packet. The pilot prefix contains a signal with a predetermined frequency. In response to determining that the pilot prefix is detected, the receiving node detects a communication mode used to transmit the data packet based on preamble signals that are contained in a preamble of the data packet and are received after the detected pilot prefix. Once the communication mode is detected, the receiving node receives and processes the remaining portion of the data packet using the detected communication mode.