OFDMA Channel Standby Control for Lower MU-MC Power Use
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Solution Overview
Problem
In multi-user multi-channel (MU-MC) communication, the standby operation of terminals in unused channels increases power consumption, and it is desirable to minimize the time spent in such standby modes to reduce power consumption.
Innovation Solution
A wireless communication device that includes a receiver configured to receive a start notification frame for resource unit-based OFDMA communication, controlling the standby operation in a second channel different from the first channel, with resource units comprising one or more subcarriers in the second channel, thereby optimizing power usage during MU-MC communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals perform standby operation in a large number of channels for MU-MC communication, then communication capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the channel monitoring task by dividing channels into two categories: primary channel and secondary channels. The terminal performs continuous standby operation only on the primary channel, while secondary channels are monitored selectively based on received notifications. This segmentation reduces the number of channels requiring constant power consumption while maintaining the ability to communicate across multiple channels.
Solution Approach 2:
The base station performs preliminary action by notifying terminals in advance about which secondary channels will be used for MU-MC communication. This notification mechanism allows terminals to prepare selectively for specific channels rather than maintaining continuous standby on all possible channels, thereby reducing power consumption while preserving communication capability.
2Adaptability or versatility
If terminals perform standby operation in multiple channels, then MU-MC communication is enabled, but standby time increases
Solution Approach 1:
The base station sends advance notifications to terminals about upcoming MU-MC communication sessions and the specific secondary channels to be used. This preliminary information allows terminals to switch to the required channels only when needed, rather than maintaining continuous standby operation across multiple channels, thus reducing the total standby time while enabling MU-MC communication.
Solution Approach 2:
The terminal dynamically adjusts its channel monitoring behavior based on received notifications. Instead of static multi-channel standby, the terminal transitions between different channel states (monitoring primary channel continuously, switching to secondary channels temporarily when notified), optimizing the balance between communication capability and time efficiency.
Data Source
AI summary
According to one embodiment, a wireless communication device includes: a receiver configured to receive a first frame notifying a start of resource unit-based OFDMA (Orthogonal Frequency Division Multiple Access) communication via a first channel; and controlling circuitry configured to control, when the first frame is received, the receiver to perform standby operation at least in a first resource unit in a second channel different from the first channel, wherein the first resource unit includes one or more subcarriers among a plurality of subcarriers disposed in the second channel.