Communication Apparatus Channel Selection for Power-Saving States
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Solution Overview
Problem
In multi-link wireless communication systems, transmitting frames via multiple frequency channels can lead to inefficiencies due to power-saving states and congestion issues, resulting in wasted resources and packet loss.
Innovation Solution
A communication apparatus that determines the optimal frequency channel for frame transmission based on whether connected devices are in a power-saving state or experiencing congestion, ensuring frames are sent only through channels where transmission and reception can be performed effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frames are transmitted via all frequency channels where connection is established, then communication coverage is improved, but energy waste occurs when devices are in power-saving state
Solution Approach 1:
The patent applies local quality by making the frame transmission behavior channel-specific rather than uniform across all channels. The AP determines the power-saving state for each individual frequency channel and selectively transmits frames only on channels where devices are in active state, thereby adapting the transmission strategy to local conditions of each channel.
2Reliability
If frames are transmitted via all frequency channels, then communication reliability is improved, but packet loss occurs due to bad communication situations
Solution Approach 1:
The patent employs feedback mechanisms where the AP receives power-saving state information from STAs for each frequency channel and uses this feedback to make intelligent transmission decisions. By continuously monitoring channel conditions and STA states, the system adapts its transmission behavior to avoid sending frames on channels with poor communication situations, thereby reducing packet loss.
3Productivity
If frames are transmitted via multiple frequency channels, then throughput is improved, but transmission interference occurs between close frequency channels
Solution Approach 1:
The patent changes the transmission parameter by selectively enabling or disabling frame transmission on specific frequency channels based on their operational state. When a channel is in power-saving state or experiencing interference, the system changes the transmission parameter to zero frames on that channel, thereby avoiding interference while maintaining throughput on healthy channels.
4Reliability
If frames are transmitted via all frequency channels, then communication completeness is improved, but transmission time is wasted due to power-saving states
Solution Approach 1:
The patent applies preliminary action by having STAs notify the AP in advance about their power-saving states on each frequency channel before frame transmission occurs. This advance information allows the AP to pre-determine which channels are suitable for transmission and avoid wasting time attempting to transmit to devices that are in power-saving state.
Data Source
AI summary
When a communication apparatus transmits a frame by multicast communication or broadcast communication in a state in which connection with one or more other communication apparatuses has been established via a plurality of frequency channels, the communication apparatus determine a frequency channel for use in transmitting the frame based on whether the one or more other communication apparatuses is being operated in a power-saving state in the plurality of frequency channels, and transmits the frame via the determined frequency channel.