UWB Messaging Schedules for Interference-Resilient Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining device positions and performing positioning procedures due to interference from other radio access technologies, particularly in ultra-wideband (UWB) systems, leading to inefficiencies and reduced accuracy.
Innovation Solution
Implementing a retransmission scheme for message handling based on a first messaging schedule that determines availability for single-sided or double-sided two-way ranging procedures, allowing for reduced overhead and improved accuracy in positioning procedures by distinguishing signals in the time domain using pulse-based UWB signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UWB ranging messages are transmitted based on a messaging schedule, then positioning procedures can be performed, but interference from other radio access technologies causes message loss and reduced accuracy
Solution Approach 1:
The patent detects message loss caused by interference and converts this harmful factor into a beneficial retransmission opportunity. When the initiator device detects that a ranging message was not successfully received (indicating interference occurred), it triggers a retransmission of the affected message, transforming the interference-induced failure into a corrected successful transmission.
Solution Approach 2:
The patent implements a feedback mechanism where the initiator device receives feedback information from responder devices about message reception status. This feedback loop allows the initiator to identify which messages were lost due to interference and selectively retransmit only those affected messages, improving reliability without requiring complete retransmission of all messages.
2Reliability
If retransmission of ranging messages is performed, then message loss from interference is corrected, but system overhead increases
Solution Approach 1:
Instead of retransmitting all ranging messages regardless of their status, the patent applies partial action by identifying and retransmitting only the specific messages that were lost due to interference. This selective retransmission approach corrects message loss while avoiding the unnecessary overhead of retransmitting messages that were already successfully delivered.
Solution Approach 2:
The patent segments the ranging message transmission process into individual message units, allowing the initiator device to track and manage each message's delivery status independently. This segmentation enables precise identification of failed messages for retransmission while leaving successful messages unchanged, thereby reducing overall system overhead.
3Measurement precision
If all responder devices are contacted for positioning, then positioning accuracy improves, but time required for positioning procedures increases
Solution Approach 1:
The patent performs preliminary actions by establishing a messaging schedule that outlines the timing and sequence of message transmissions to multiple responder devices. This scheduled approach allows the initiator to efficiently coordinate communications with multiple responders without unnecessary delays, maintaining positioning precision while optimizing the time required through structured message exchange.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, an initiator device may transmit, based on a first messaging schedule, a ranging initiation message to a plurality of responder devices based on a first radio access technology (RAT). The initiator device may receive one or more ranging response messages from a first subset of the plurality of responder devices based on the first RAT, the one or more ranging response messages acknowledging reception of the ranging initiation message. The initiator device may transmit a first measurement report message to the plurality of responder devices based on a second RAT. The first measurement report message indicates the first subset of the plurality of responder devices as available for single-sided two-way ranging, a second subset of the plurality of responder devices as unavailable for two-way ranging, or both.