Bluetooth Low-Energy Scanning and Ranging Proxy Offload
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Small electronic wireless communication devices with limited power reserves face rapid battery depletion when keeping wireless interfaces active for extended periods, making it difficult to use them for extended periods without recharging.
Innovation Solution
Offloading wireless scanning functionality to proxy devices with larger power reserves, allowing the smaller devices to conserve energy by leveraging the scanning results from the proxy devices, which can establish and maintain connections using lower power interfaces like BLE for proximity detection and higher power interfaces for ranging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless scanning is performed continuously to detect nearby devices and networks, then device connectivity and functionality are improved, but power consumption increases and battery life decreases
Solution Approach 1:
A proxy device acts as an intermediary between the low-power wearable device and the wireless network environment. The proxy device performs energy-intensive wireless scanning and network discovery operations, then transmits condensed results back to the wearable device via low-power Bluetooth LE connections. This mediator approach allows the wearable device to maintain connectivity awareness without performing its own continuous scanning, directly resolving the contradiction between connectivity productivity and power consumption.
Solution Approach 2:
The wireless scanning functionality is segmented and distributed across multiple devices with different power characteristics. The proxy device handles the energy-intensive scanning operations, while the wearable device only processes and acts on relevant scan results. This segmentation allows each device to operate within its power constraints while achieving the overall system goal of continuous connectivity awareness.
2Ease of operation
If wireless interface is kept active for extended periods to maintain connectivity, then device functionality is improved, but battery depletion accelerates
Solution Approach 1:
Instead of continuous operation, the system uses periodic action through event-driven architecture. The wearable device maintains a low-power Bluetooth LE connection that activates only when needed - such as when new devices or networks are detected by the proxy, or when the wearable needs to perform pairing or connection operations. This periodic activation pattern maintains device functionality while dramatically extending battery life compared to continuous interface operation.
Solution Approach 2:
The energy-intensive wireless scanning functionality is extracted from the wearable device and relocated to the proxy device. The wearable device retains only the essential low-power Bluetooth LE interface for communication with the proxy and for executing actual pairing operations. By taking out the scanning function, the wearable device can maintain functionality through periodic low-power operations while extending its operational duration without recharging.
3Speed
If scanning operations are performed by the small device itself, then response time is improved, but power consumption increases
Solution Approach 1:
The proxy device serves as an intermediary that performs scanning operations and then efficiently communicates results back to the wearable device. The proxy is positioned strategically (such as being connected to the same network as the target device or located in a central position) to minimize the communication distance and data transmission time. This intermediary approach balances response time requirements with power consumption constraints by using the proxy's faster processing and strategic location to compensate for the additional communication hop.
Solution Approach 2:
The proxy device performs scanning operations in advance and pre-processes the results to identify and prioritize relevant targets before the wearable device needs to act. The proxy maintains a database of scanned devices and networks, pre-filtering and organizing information so that when the wearable device needs to connect, the relevant information is already ready for immediate use. This preliminary action reduces the overall response time while keeping the wearable device in a low-power state during the scanning process.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A first device may communicate via a first wireless interface (WI) and a second WI, with the second WI operating at a relatively higher power level than the first WI. The first device may receive a scan notification corresponding to wireless scanning performed by a second device. The first device may subsequently perform wireless scanning using the second WI in response to the scan notification indicating that the first device is within effective communication range of a third device. The first device may receive the scan notification over a wireless connection established between the first device and the second device using the first WI. The first device may transmit filter information to the second device, the filter information indicating when, and for which scans the first device is to receive scan notifications. The first device may also activate the second WI and use the second WI to perform ranging and/or control operations associated with the third device.