Channel Bonding Power Save Control for Wireless LAN Terminals
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Solution Overview
Problem
Current wireless LAN systems face challenges in achieving significant power saving due to increased complexity and power consumption, particularly with channel bonding technologies, and existing methods either fail to deliver sufficient power efficiency or cause coexistence issues with existing devices.
Innovation Solution
The proposed solution involves an apparatus and method for controlling bandwidth using a channel bonding power save (CBPS) scheme, which includes defining a CBPS action frame and dynamic/pseudo-dynamic modes to manage bandwidth efficiently, allowing terminals to switch between different bandwidths based on data transmission needs, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bonding technology is used to improve PHY rate, then throughput performance is improved, but terminal power consumption increases dramatically
Solution Approach 1:
The patent implements dynamic bandwidth switching where the terminal operates in different bandwidth modes (20MHz, 40MHz, 80MHz) based on real-time data transmission requirements. The terminal switches to wider bandwidth only when data needs to be transmitted, and returns to narrower bandwidth for power saving during idle periods, making the bandwidth configuration dynamic rather than static
Solution Approach 2:
The patent changes the operational parameters of the terminal by adjusting the bandwidth configuration (20MHz vs 40MHz vs 80MHz) and transmission power levels based on traffic conditions. The access point controls the terminal to use appropriate bandwidth and power settings, transforming the fixed parameter system into a variable parameter system that adapts to traffic demands
2Use of energy by moving object
If spatial multiplexing power save (SMPS) operation is implemented, then power consumption is reduced, but power saving effect is insufficient
Solution Approach 1:
The patent segments the power saving approach into multiple hierarchical levels: (1) bandwidth-level segmentation (20MHz/40MHz/80MHz modes), (2) transmission-level segmentation (data transmission vs. idle states), and (3) antenna-level segmentation (SMPS operation). This multi-level segmentation allows the system to achieve comprehensive power saving by applying appropriate strategies at each level rather than relying on a single insufficient method
3Speed
If bandwidth is continuously maintained at high level, then data transmission speed is improved, but unnecessary power consumption increases
Solution Approach 1:
The patent implements periodic bandwidth adjustment where the terminal alternates between high bandwidth (for data transmission) and low bandwidth (for power saving) based on periodic traffic patterns. The access point monitors traffic conditions and instructs the terminal to switch bandwidth levels periodically, ensuring high speed only when necessary and power saving during idle periods
Solution Approach 2:
The patent extracts the essential function of wide bandwidth (high-speed data transmission) and separates it from continuous operation. The terminal uses wide bandwidth only when data transmission function is required, and switches to narrow bandwidth when this function is not needed, thereby eliminating unnecessary energy consumption associated with maintaining high bandwidth continuously
Data Source
AI summary
The present invention relates to an apparatus and method for power saving of a terminal in a wireless communication system and, particularly, to an apparatus and method for power saving of a terminal in a wireless LAN system. A method according to an embodiment of the present invention, which is a data transmission and reception method for power saving of a terminal in a wireless LAN system access point, may comprise the steps of: transmitting a control frame including information for channel bonding power saving control; when there is data to be transmitted from a specific terminal, determining whether the corresponding terminal is in a state where a channel bonding power saving control function is activated; when the terminal is in a state where the channel bonding power saving control function is activated, checking whether the terminal is in a dynamic mode; and when the terminal is in the dynamic mode, configuring the data to be transmitted as a data frame for transmitting the data in a channel bonding scheme, and transmitting the data frame.