Beacon Channel Switching for Multi-Frequency Synchronization
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Solution Overview
Problem
In wireless communication systems using multiple frequency channels, the transmission of Beacon frames increases power consumption and processing load, leading to some devices failing to receive the frames and losing synchronization, especially when power-saving functions are used.
Innovation Solution
A communication apparatus transmits Beacon frames including information on both primary and secondary frequency channels, allowing devices to switch to the appropriate channel for synchronization and reducing power consumption by transmitting through a single representative channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AP transmits Beacon frames through multiple frequency channels, then all communication apparatuses can receive the Beacon frame, but power consumption and processing load increase
Solution Approach 1:
The patent segments the Beacon frame transmission by including frequency channel information that indicates multiple frequency channels within a single Beacon frame. This allows the Beacon frame to be transmitted through one frequency channel while containing information about other frequency channels, thereby reducing power consumption while maintaining the ability to reach communication apparatuses on multiple channels.
2Reliability
If the AP transmits Beacon frames through multiple frequency channels, then all communication apparatuses can receive the Beacon frame, but processing load increases
Solution Approach 1:
The patent segments the Beacon frame transmission by including frequency channel information that indicates multiple frequency channels within a single Beacon frame. This allows the Beacon frame to be transmitted through one frequency channel while containing information about other frequency channels, thereby reducing processing load while maintaining the ability to reach communication apparatuses on multiple channels.
3Use of energy by moving object
If the AP transmits Beacon frames only through a representative frequency channel, then power consumption and processing load are reduced, but communication apparatuses on other frequency channels cannot receive the Beacon frame
Solution Approach 1:
The patent uses frequency channel information as an intermediary element within the Beacon frame. This information acts as a mediator that allows communication apparatuses on non-representative frequency channels to identify and switch to the appropriate frequency channel to receive the Beacon frame, thereby maintaining reception reliability while transmitting through a single channel.
4Use of energy by moving object
If communication apparatuses use power saving function, then power consumption is reduced, but they cannot acquire basic information for synchronization
Solution Approach 1:
The patent implements preliminary action by including frequency channel information in the Beacon frame that enables communication apparatuses to acquire basic synchronization information even when in power-saving mode. The frequency channel information allows devices to determine which frequency channel to monitor for Beacon frames, ensuring they can maintain synchronization without continuous active reception.
Data Source
AI summary
In a case where a Beacon frame is transmitted through a first frequency channel, and a communication apparatus and one of a multi-link communication non-supporting apparatus and a communication apparatus supporting multi-link communication establish connection through a second frequency channel while a multi-link communication supporting apparatus and the communication apparatus establish connection through a first frequency channel, a frequency channel to transmit the Beacon frame is switched from the first frequency channel to the second frequency channel.