Secure UWB PHY Payload Ranging With Lower Resource Overhead
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Solution Overview
Problem
Localization operations using ultra-wideband signals can consume excessive resources, exhibit insufficient accuracy, and lack security in wireless communications systems.
Innovation Solution
Implementing ultra-wideband signals with coding schemes, cyclic redundancy checks, and encryption to enhance accuracy and security while optimizing channel usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional UWB localization operations are performed without optimization, then basic ranging functionality is achieved, but resource consumption becomes excessive
Solution Approach 1:
The patent extracts and removes the scrambled time sequence (STS) component from the UWB ranging frame structure. By performing correlation operations directly on the PHY payload without requiring STS, the system eliminates unnecessary signal components, reducing processing complexity and improving channel usage efficiency while maintaining accurate range estimation capability
Solution Approach 2:
The patent applies parameter changes by implementing coding schemes (such as LDPC coding) and spreading factors on the PHY payload. These parameter modifications enable the payload to carry sufficient correlation information for accurate ranging while reducing the need for additional overhead signals, thereby optimizing resource consumption and channel efficiency
2Reliability
If basic UWB ranging is performed without enhanced security measures, then ranging functionality is maintained, but security levels are insufficient
Solution Approach 1:
The patent applies preliminary action by implementing encryption and integrity check mechanisms on the PHY payload before transmission. The coding scheme and spreading factors are applied in advance to the payload data, enabling secure and accurate correlation operations at the receiver without requiring complex post-processing security verification
Solution Approach 2:
The patent introduces cryptographic intermediaries including encryption algorithms and integrity check values that mediate between the transmitted signal and the correlation operation. These intermediaries ensure security and accuracy by validating the authenticity of the received payload before range estimation, preventing unauthorized or corrupted data from compromising the ranging function
3Measurement precision
If accuracy enhancement techniques are applied to UWB ranging, then range estimation precision improves, but resource consumption increases
Solution Approach 1:
The patent makes the PHY payload multi-functional by designing it to simultaneously carry data information and correlation information for ranging. Through the application of coding schemes and spreading factors, the same payload structure serves both communication and localization functions, eliminating the need for separate dedicated ranging signals and reducing overall processing resource requirements while maintaining high accuracy
Data Source
AI summary
A communications system may include first and second electronic devices. The first device may transmit an ultra-wideband (UWB) signal to the second device. The UWB signal may include pulses that represent a ranging frame. The pulses may include a series of pulses representing a physical layer (PHY) payload of the ranging frame. The second device may estimate a range to the first device and/or a location of the first device based on a correlation of the series of pulses representing the PHY payload of the ranging frame. The first device may apply a coding scheme to the PHY payload that reduces, or minimizes, a bit error rate of the correlation at the second device, may apply a cyclic redundancy check, may transmit the PHY payload using a spreading factor greater than one, and/or may apply encryption to the PHY payload for integrity check purposes.