Short-header MAC Frames for Power-Constrained IoT Devices
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Solution Overview
Problem
Power-constrained devices, such as battery-operated sensors, face challenges in extending battery life due to high power consumption during transmission and reception of full-length Media Access Control (MAC) frames, where significant power is used for control information that may not be relevant to their operations.
Innovation Solution
Configuring and transmitting shortened MAC frames with fewer fields than full-length frames, specifically including a frame control field, two MAC address fields, a sequence control field, and a frame check sequence field, while excluding other fields, to reduce power consumption and processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full-length IEEE 802.11 MAC frames are used for communication, then complete control information is transmitted, but power consumption increases and battery life decreases
Solution Approach 1:
The patent extracts only the essential fields from the full-length MAC frame to create a shortened version. Specifically, it retains the frame control field, two MAC address fields, sequence control field, and FCS field, while excluding other non-essential fields. This extraction principle reduces the frame size and power consumption while maintaining the minimum necessary control information for reliable communication.
Solution Approach 2:
The patent applies local quality by making different parts of the communication system have different characteristics. Power-constrained devices use shortened MAC frames with minimal fields, while other devices can continue using full-length frames. This allows each device to operate with the appropriate level of complexity and power consumption for its specific constraints.
2Reliability
If full-length MAC frames with all fields are transmitted, then complete control information is provided, but communications overhead increases
Solution Approach 1:
The patent removes non-essential fields from the MAC frame structure, keeping only the critical components needed for basic communication functionality. This extraction reduces the quantity of data transmitted (communications overhead) while preserving the essential control information required for reliable operation.
3Reliability
If full-length MAC frames are processed, then complete control information is handled, but device complexity increases
Solution Approach 1:
By extracting only the essential fields from the MAC frame, the patent reduces the amount of data that power-constrained devices need to process. This simplifies the device architecture and processing requirements while maintaining the necessary control information for reliable communication.
Solution Approach 2:
The patent enables different devices to have different processing capabilities and frame formats. Power-constrained devices use simplified shortened frames with minimal processing requirements, while other devices can handle full-length frames. This local differentiation reduces device complexity for power-constrained applications.
Data Source
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AI summary
A method for communicating information from a power-constrained device includes configuring, by the power-constrained device, a short media access control (MAC) frame having fewer fields than a full-length MAC frame. The method also includes transmitting, by the power- constrained device, the short MAC frame.