Truncated Preamble and Shortened Header for BAN Power Efficiency
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Solution Overview
Problem
In wireless networks with star topology, particularly in battery-operated devices, the lengthy preambles and headers in PPDU transmission lead to increased power consumption and reduced opportunities for other devices to transmit, as they prolong transmission times and require more power.
Innovation Solution
Implementing a modified protocol that uses a truncated preamble or shortened header, allowing devices to negotiate and configure their transceivers for reduced PPDU transmission times, thereby reducing power consumption and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard preamble and header formats are used, then communication reliability is maintained, but transmission time and power consumption increase
Solution Approach 1:
The patent implements dynamic adaptation of preamble and header lengths based on communication requirements. Devices can negotiate to use truncated preambles (e.g., 72 symbols instead of 90) and shortened headers when reliability allows, enabling the system to adjust transmission parameters dynamically rather than using fixed standard formats, thus reducing power consumption while maintaining adequate communication reliability.
Solution Approach 2:
The patent changes key parameters of the physical layer format including preamble length (reducing from 90 to 72 symbols) and header spreading factor (reducing from 4 or 2 to 2 or 1). These parameter modifications enable faster transmission and lower power consumption while the patent ensures through negotiation mechanisms that communication reliability is maintained through proper configuration of these parameters.
2Reliability
If standard preamble and header formats are used, then communication reliability is maintained, but transmission opportunities for other devices are reduced
Solution Approach 1:
The system enables dynamic negotiation between devices to use truncated preambles and shortened headers for established connections. This allows the network to optimize transmission parameters based on current traffic conditions and device capabilities, increasing overall network productivity and throughput while maintaining reliable communication for active connections.
Solution Approach 2:
By modifying preamble length and header parameters, the patent reduces the time each device needs to transmit and receive frames. This parameter optimization increases the number of transmission opportunities available within a beacon period, thereby improving overall network productivity and device throughput while maintaining communication reliability through proper protocol configuration.
3Productivity
If longer transmission times are used, then data communication is completed, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of transmission parameters based on the specific communication needs and device capabilities. Devices can negotiate to use truncated preambles and shortened headers when full standard formats are not necessary, enabling the system to complete data communication efficiently while minimizing power consumption by avoiding unnecessary transmission time.
Solution Approach 2:
The patent modifies key transmission parameters including preamble length (reducing from 90 to 72 symbols) and header spreading factor to optimize the balance between data communication completion and power consumption. These parameter changes enable faster transmission of essential data while reducing the time and energy required for transmission, particularly important for battery-operated devices.
Data Source
AI summary
A first device is adapted to communicate with a second device using a protocol standard. The devices exchange security and connection setup frames using a preamble format and a header format defined in the protocol standard. The connection setup frames specify a modified protocol using a truncated preamble, a shortened header, or both. The devices configure their transceivers to transmit and receive frames formatted based on the modified protocol.