Uniform Bluetooth Channel Sounding for Accurate, Low-Power Ranging
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Solution Overview
Problem
Existing Bluetooth channel sounding (BCS) configurations in wireless communication systems, particularly in Bluetooth Low Energy (BTLE) frameworks, face inefficiencies in ranging accuracy, power consumption, and over-the-air resource utilization due to non-uniform inter-channel spacing, leading to suboptimal performance in distance measurement.
Innovation Solution
Implementing a BCS configuration that utilizes uniform inter-channel spacing greater than or equal to 2 for channel sounding within a bandwidth section, optimizing channel selection to enhance ranging accuracy, reduce power consumption, and improve OTA resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If non-uniform inter-channel spacing is used in BCS configuration, then channel sounding can be performed, but ranging accuracy deteriorates and power consumption increases
Solution Approach 1:
The patent changes the inter-channel spacing parameter from non-uniform to uniform values (specifically 2, 4, or 6 channels spacing). This parameter modification optimizes the balance between ranging accuracy and power consumption by selecting uniform spacing patterns that provide sufficient measurement precision while reducing the number of active channels, thereby lowering power consumption.
2Productivity
If non-uniform inter-channel spacing is used in BCS configuration, then channel sounding can be performed, but OTA resource utilization deteriorates
Solution Approach 1:
The patent modifies the channel spacing parameter to uniform values (2, 4, or 6 channels), which optimizes OTA resource utilization. This parameter change ensures efficient use of air interface resources by avoiding redundant channel measurements while maintaining sufficient ranging accuracy through strategically selected uniform spacing intervals.
3Use of energy by moving object
If uniform inter-channel spacing with integer >= 2 is used, then power consumption is reduced and OTA resources are optimized, but device complexity increases
Solution Approach 1:
The patent standardizes the inter-channel spacing parameter to specific uniform integer values (2, 4, or 6), which simplifies the configuration space. This parameter discretization reduces device complexity by providing a limited set of pre-defined spacing options that balance power consumption and resource efficiency without requiring complex adaptive algorithms.
4Measurement precision
If uniform inter-channel spacing with integer >= 2 is used, then ranging accuracy is improved, but the number of channels to sound increases
Solution Approach 1:
The patent selects uniform inter-channel spacing values (2, 4, or 6) that optimize the trade-off between ranging accuracy and the number of channels. These parameter choices ensure sufficient measurement precision is achieved with a manageable number of sounding channels, avoiding the need to activate all available channels while maintaining accurate distance measurement.
Data Source
AI summary
Aspects of the disclosure are directed to a Bluetooth sounding channel (BCS) configuration that configures channels for sounding within bandwidth section(s) in accordance with a uniform inter-channel spacing. In an aspect, the uniform inter-channel spacing is an integer that is greater than or equal to 2. Such aspects may provide various technical advantages, such as providing reasonable ranging accuracy while also providing power savings, more efficient over-the-air (OTA) resource utilization and reduced ranging latency.