Wi-Fi Sensing Transmission Negotiation for Low-Jitter Channel Sharing
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Solution Overview
Problem
Existing Wi-Fi sensing systems face inefficiencies due to incompatible requested and existing data transmission configurations, leading to inefficient channel bandwidth use and measurement time jitter, as they lack flexible mechanisms for soliciting remote device transmissions optimized for sensing.
Innovation Solution
Implement a method and system for Wi-Fi sensing that includes transmitting and receiving sensing measurement setup request and response messages, allowing for adjustment of transmission parameters such as frequency band, bandwidth, and steering matrix configurations to accommodate flexible sensing transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the remote device strictly accommodates every aspect of the requested sensing configuration, then sensing measurement precision is improved, but channel bandwidth utilization deteriorates due to inability to aggregate with existing data transmissions
Solution Approach 1:
The patent introduces flexibility by allowing certain transmission parameters (such as modulation and coding scheme, transmit power, antenna selection) to be adjusted or relaxed when aggregating sensing transmissions with existing data transmissions. The sensing initiator device negotiates parameter adjustments with the remote device, enabling the sensing transmission to maintain adequate measurement precision while adapting to the constraints of existing data transmission configurations, thereby improving channel bandwidth utilization.
2Measurement precision
If the remote device sends dedicated sensing transmissions according to requested configuration, then sensing measurement accuracy is improved, but measurement time jitter increases due to inability to synchronize with scheduled data transmissions
Solution Approach 1:
The patent implements dynamic parameter adjustment where the transmission configuration for sensing is made flexible rather than fixed. The sensing initiator device and remote device negotiate and agree upon parameter adjustments that allow sensing transmissions to be synchronized with scheduled data transmissions. This dynamic adaptation enables the system to maintain measurement accuracy while reducing measurement time jitter by aligning sensing transmissions with the time schedule of existing data transmissions.
3Reliability
If sensing transmissions are sent separately from existing data transmissions, then sensing configuration requirements are met, but system complexity increases due to separate transmission scheduling
Solution Approach 1:
The patent merges sensing transmissions with existing data transmissions by allowing aggregation at the MAC layer. Instead of scheduling separate dedicated sensing transmissions, the system combines sensing data with data transmissions that are already scheduled. This merging approach maintains sensing configuration requirements through parameter negotiation and adjustment, while significantly reducing system complexity by eliminating the need for separate transmission scheduling mechanisms.
Data Source
AI summary
Systems and methods for accommodating flexibility in sensing transmissions are provided. Wi-Fi sensing systems include sensing devices and remote devices configured to communicate through radio-frequency signals. Initially, a sensing device transmits a sensing configuration message to a remote device. The sensing device receives a sensing configuration response message in response to the sensing configuration message. In an example, the sensing configuration response message may include a transmission capability indication associated with the remote device. The transmission capability indication includes a flexibility indication that the remote device supports flexibility.