Wireless Ranging Frames with Quasi-Simultaneous Transmission
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Solution Overview
Problem
Devices with multiple transmitters, such as vehicles, face challenges in reliable communication due to increased power requirements at remote devices like keyfobs, which have limited battery capacity, especially when receiving multiple transmissions for ranging or remote control functions.
Innovation Solution
A communication scheme using quasi-simultaneous frames with pseudo-randomized pulses and secure training sequences, where multiple transmitters send frames with slight time offsets and aligned cipher sequences, allowing the receiver to decode one frame efficiently while maintaining security and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmitters send transmissions to improve reliability, then communication reliability is improved, but power consumption at the remote device increases
Solution Approach 1:
The patent implements periodic action by having multiple transmitters send frames in a time-multiplexed manner rather than simultaneously. Each transmitter is assigned a specific time slot to transmit its frame, creating a periodic transmission pattern. This allows the remote device to receive reliable communications from multiple transmitters while consuming power only during designated reception periods, significantly reducing overall power consumption compared to continuous monitoring of multiple simultaneous transmitters.
2Reliability
If multiple transmitters send simultaneous frames, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the communication frame into distinct segments with specific structures. Each frame contains a SYNC portion with a preamble sequence, an SFD portion for frame identification, and a payload portion for data transmission. This segmented structure allows the remote device to efficiently process each segment independently, reducing the complexity of handling multiple simultaneous frames while maintaining communication reliability through the coordinated transmission of these structured segments.
Data Source
AI summary
Embodiments of a device for wireless communication are disclosed. In some embodiments, the device includes: a transceiver configured to receive a message from a second device and at least one processor. The processor is communicatively coupled to the transceiver and is configured to: generate a response message includes a SYNC portion, a start frame delimiter (SFD) portion, and a cipher portion. The SYNC portion includes a sequence of symbols forming a preamble. The cipher portion includes a ciphered sequence of pseudo-randomized pulses. The transceiver is further configured to transmit the response message.