Dynamic Beacon Interval Control for Wi-Fi Latency
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Solution Overview
Problem
In communication systems using the IEEE 802.11 series, data transmission delays occur due to the base station's fixed beacon transmission interval, leading to quality deterioration of real-time data like audio and video, and potential time-outs in response communications.
Innovation Solution
A communication apparatus that recognizes the transmission interval of beacons transmitted by the base station and adjusts it dynamically to minimize delays, by either changing the base station's settings or altering the communication mode to active mode when delays are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the base station transmits beacons according to a fixed transmission interval, then the base station can maintain stable power saving mode operation and reduce energy consumption, but data transmission delays occur leading to deterioration of real-time audio/video quality and communication time-outs
Solution Approach 1:
The patent makes the beacon transmission interval dynamic by allowing the communication apparatus to change its own beacon reception interval based on the type of data being transmitted. For real-time data (audio/video), the apparatus receives beacons more frequently, while for non-real-time data, it uses longer intervals to save power. This resolves the contradiction by adapting the interval to the specific data requirements rather than using a fixed interval for all scenarios.
Solution Approach 2:
The patent changes the parameter of beacon transmission interval based on data type. The base station transmits different types of data (real-time vs. non-real-time) with different beacon interval settings. For real-time data transmission, the beacon interval is shortened to reduce delay, while for non-real-time data, the interval is extended to save energy. This parameter adaptation resolves the contradiction between energy efficiency and transmission delay.
2Use of energy by stationary object
If the base station uses a long beacon transmission interval to save energy, then power consumption is reduced, but real-time audio and video data quality deteriorates due to transmission delays
Solution Approach 1:
The system dynamically adjusts the beacon reception interval at the communication apparatus based on the real-time requirements of the data being transmitted. When audio or video data is being received, the apparatus switches to a shorter beacon interval to ensure timely data transmission and maintain quality. When no real-time data is present, it uses a longer interval to conserve power, thus resolving the contradiction between power saving and data quality.
Solution Approach 2:
The beacon interval parameter is changed according to the data type being transmitted. For real-time audio/video data, the interval is set to a shorter value to ensure quality of service. For non-real-time data or when in idle state, the interval is extended to reduce power consumption. This conditional parameter adjustment resolves the contradiction between energy efficiency and reliability of real-time transmission.
3Loss of time
If the base station transmits data immediately upon receipt to ensure real-time transmission, then data transmission delay is reduced, but the base station cannot maintain power saving mode effectively
Solution Approach 1:
The patent segments data transmission into different categories: real-time data (audio/video) and non-real-time data. For real-time data, the base station transmits immediately upon receipt with shorter beacon intervals, ensuring low delay. For non-real-time data, it uses extended beacon intervals to save power. This segmentation allows the system to optimize for both low delay and power saving depending on the data type, resolving the contradiction.
Solution Approach 2:
The system changes the beacon transmission interval parameter based on the urgency and type of data. For immediate real-time data transmission requirements, the interval is shortened. For less urgent data, the interval is extended to enable power saving mode. This dynamic parameter adjustment resolves the contradiction between transmission speed and energy consumption.
4Use of energy by stationary object
If the base station extends the beacon transmission interval to reduce data transmission frequency, then energy consumption is reduced, but communication time-outs occur when response requests are sent
Solution Approach 1:
The communication apparatus dynamically adjusts its beacon reception interval based on communication state and data type. When in power saving mode with extended intervals, the system ensures that response requests and their acknowledgments are handled within the available time windows, preventing time-outs. The interval extension is applied selectively rather than universally, maintaining reliability while reducing overall energy consumption.
Solution Approach 2:
The beacon interval parameter is adjusted based on communication requirements. For scenarios requiring reliable response communication, the system ensures that the interval settings accommodate round-trip communication timing. For pure data transmission scenarios, longer intervals can be used. This conditional parameter adjustment resolves the contradiction between energy saving and communication reliability.
Data Source
AI summary
A communication apparatus includes a recognition unit configured to recognize a transmission interval of a predetermined beacon transmitted by a base station configured to transmit data addressed to a plurality of apparatuses when the predetermined beacon is transmitted, and a control unit configured to perform control to change the transmission interval based on the recognized transmission interval.