Wi-Fi Direct Terminal Frame Length Adaptation
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Solution Overview
Problem
Wi-Fi direct-connecting technology experiences high power consumption due to the transmitting power of radio frequency antennas, which limits its application in devices with direct current power supplies.
Innovation Solution
A terminal device that dynamically adjusts the lengths of interaction frames in the scanning, discovery, and operating phases, reducing power consumption by omitting unnecessary data fields and using a broadcast control frame to confirm dynamic frame interaction support, and optimizing MAC headers and frame body data areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Wi-Fi direct-connecting technology is used for device communication, then transmission rate and connecting range are improved, but power consumption increases due to radio frequency antenna transmitting power
Solution Approach 1:
The patent implements dynamic frame length adjustment by modifying the MAC header structure to include a variable frame control field. The frame format transitions from fixed-length traditional frames to dynamically sized frames based on actual data requirements, allowing the system to optimize transmission efficiency while reducing unnecessary power consumption from transmitting redundant data
Solution Approach 2:
The patent changes the frame structure parameters by introducing a compact MAC header with optimized field lengths. The frame control field is reduced from traditional 2 bytes to 1 byte by utilizing bit-level optimization, and the overall frame length is made variable rather than fixed, enabling parameter optimization that reduces power consumption while maintaining transmission rate
2Adaptability or versatility
If traditional fixed-length data frames are used for communication, then compatibility with existing protocols is maintained, but power consumption increases due to transmission of unnecessary data
Solution Approach 1:
The patent segments the frame into distinct functional areas with optimized lengths: a compact MAC header (1 byte frame control + 2 bytes address + 2 bytes sequence number = 5 bytes minimum) and a separate data payload area. This segmentation allows the header to be minimized for efficiency while the data area adapts to actual needs, reducing power consumption from transmitting fixed-length headers when little data is being exchanged
Solution Approach 2:
The patent introduces dynamic frame length by making the total frame size variable based on actual data requirements. The frame control field includes bits that indicate frame type and status, enabling the receiver to properly interpret variable-length frames while maintaining protocol compatibility. This dynamic structure eliminates the need to transmit fixed-length frames when minimal data is being exchanged
Data Source
AI summary
The disclosure provides a terminal device, and frame sending and receiving methods, which relate to the field of communications. The terminal device includes: a confirming component configured to send a broadcast control frame to another terminal device which supports a Wireless Fidelity (Wi-Fi) direct-connecting technology, and confirm that the another terminal device which replies a broadcast response frame supports dynamic frame interaction after receiving the broadcast response frame replied by the another terminal device; and a scanning component configured to send a scanning request frame to the another terminal device which supports the dynamic frame interaction, wherein the field indicating the address of the receiving end in the scanning request frame is null. The length of the frames are greatly reduced by dynamically and self-adaptively adjusting the lengths of interaction frames for the frames in a scanning phase, a discovery phase and an operating phase respectively, thereby effectively solving the problem of power consumption; and meanwhile, a simple physical-connecting solution can be realized, and therefore devices which support Wi-Fi direct-connecting can simply interact with one another.