Eliciting MIMO Transmissions via Higher-Layer Protocol Messages
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Solution Overview
Problem
Existing wireless motion detection systems often fail to automatically elicit Multiple-Input Multiple-Output (MIMO) transmissions from wireless communication devices in response to certain physical layer or media access control layer messages, limiting their motion detection accuracy and coverage.
Innovation Solution
The system uses messages initiated by higher-layer protocols, such as ICMP Ping, ARP Ping, or TCP Ping, to elicit MIMO transmissions from wireless communication devices, incorporating MIMO training fields with higher frequency resolution and bandwidth, enabling more accurate motion detection without requiring additional hardware or firmware on the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical layer or media access control layer messages are used to elicit MIMO transmissions, then motion detection can be performed, but automatic elicitation of MIMO transmissions fails to occur
Solution Approach 1:
The patent changes the protocol layer parameter from physical/MAC layer to higher-layer protocols (ICMP Ping, ARP Ping, TCP Ping) to elicit MIMO transmissions. This parameter change enables automatic elicitation while maintaining motion detection accuracy, as the higher-layer protocols trigger device responses that include MIMO training fields necessary for accurate motion detection.
2Adaptability or versatility
If higher-layer protocol messages are used to elicit MIMO transmissions, then broader device compatibility is achieved, but additional hardware or firmware is required
Solution Approach 1:
The patent applies universality by using standard higher-layer protocols (ICMP Ping, ARP Ping, TCP Ping) that are universally supported by wireless communication devices. These protocols enable MIMO transmission elicitation across diverse devices without requiring specialized hardware or custom firmware, as the protocols are part of standard device functionality.
3Measurement precision
If MIMO training fields with higher frequency resolution are used, then motion detection accuracy improves, but transmission bandwidth requirements increase
Solution Approach 1:
The patent uses preliminary action by incorporating MIMO training fields into the initial protocol messages (ICMP Ping, ARP Ping, TCP Ping) exchanged between devices. These training fields are transmitted beforehand to establish channel state information with high frequency resolution, enabling accurate motion detection without requiring additional bandwidth for separate training sequences.
Data Source
AI summary
In a general aspect, a rate at which MIMO transmissions are elicited from wireless communication devices is varied. A first wireless communication device may be configured to wirelessly transmit a first set of messages at a first transmission rate to a second wireless communication device. The first wireless communication device may further be configured to receive MIMO transmissions from the second wireless communication device. The first wireless communication device may additionally be configured to generate first channel information based on respective training fields in each of the first MIMO transmissions; determine a rate at which the first channel information is generated; vary the first transmission rate to a second, different transmission rate based on the rate at which the first channel information is generated; and wirelessly transmit a second set of messages at the second transmission rate to the second wireless communication device.