Electronic Device Doppler Mode Control
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Solution Overview
Problem
The Wi-Fi protocol specifications, such as 802.11ac and 802.11ax, face performance degradation due to changes in channel information during data frame reception, especially in mobile environments, as the wireless router may not receive sufficient traffic to accurately estimate channel changes in real time for optimal Doppler mode settings.
Innovation Solution
An electronic device equipped with a processor and sensor is able to determine the use or non-use of the Doppler mode and its insertion periodicity based on network environment changes and mobility information, and communicates this to the wireless router, allowing for adaptive communication mode adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless router controls the Doppler mode setting, then the router can manage communication mode, but the router cannot independently set the Doppler mode for each electronic device and may not receive sufficient traffic to accurately estimate channel changes
Solution Approach 1:
The patent inverts the control relationship by allowing the electronic device (receiver) to determine Doppler mode settings and communicate them to the wireless router (transmitter). This enables each device to independently assess its own mobility conditions and request appropriate communication modes, solving both the accuracy and adaptability problems.
Solution Approach 2:
Each electronic device independently determines its own Doppler mode needs based on its mobility characteristics and communication requirements. The device performs self-assessment of channel conditions and autonomously configures communication parameters, eliminating the need for the router to centrally control settings for all devices.
2Measurement precision
If the 802.11ax protocol with Doppler mode is used, then channel information estimation can be improved, but the transmission time increases and performance degradation worsens due to longer data frame duration
Solution Approach 1:
The patent implements dynamic switching between first mode (without Doppler mode, shorter transmission) and second mode (with Doppler mode, longer transmission but better channel estimation). The system adapts the communication mode in real-time based on detected mobility conditions, using the longer transmission mode only when channel changes are detected, thereby minimizing overall time loss.
Solution Approach 2:
The patent changes the communication parameter (Doppler mode activation) based on detected mobility conditions. When mobility is detected, the system transitions to using mid-ambles with longer transmission duration; when stationary, it uses the shorter transmission mode, optimizing the balance between channel estimation accuracy and transmission time.
3Adaptability or versatility
If the electronic device moves at walking speed, then mobility is detected, but channel information changes in the middle of receiving data frame causing MPDU errors and performance degradation
Solution Approach 1:
The patent performs preliminary detection of mobility conditions before data transmission begins. Based on this pre-detection, the system proactively configures the appropriate communication mode (first or second mode) and notifies the transmitter in advance, ensuring that channel estimation parameters are properly set before channel changes occur during reception.
Solution Approach 2:
The electronic device detects its own mobility status and feeds back this information to the wireless router, which then adjusts transmission parameters accordingly. This feedback loop ensures that the transmitter uses appropriate channel estimation methods (with or without mid-ambles) based on the receiver's actual mobility conditions, maintaining reliable data reception.
Data Source
AI summary
An electronic device includes: a memory; a communication circuit configured to wirelessly communicate with an external electronic device through a wireless communication channel by using a short-range wireless communication protocol; and a processor operatively connected with the memory and the wireless communication circuit and configured to cause determining whether a data frame for transmission includes a mid-amble based on a ratio between a number of data frames from the external electronic device and a number of data frames to the external device and transmitting to the external device, a data frame based on such comparison with or without a mid-amble.