UWB Signal Interference Avoidance via Frame Segmentation
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Solution Overview
Problem
Existing electronic devices using ultra-wide band (UWB) communication technology face interference issues when multiple devices transmit signals to obtain information on external objects, leading to inaccurate data and signal collisions.
Innovation Solution
An electronic device equipped with a UWB circuit operates in a first mode to transmit a first signal and a second signal with designated information, receiving corresponding reflected signals. Based on the state of the designated information identified from the second reflected signal, the device determines whether to obtain information on the external object from the first reflected signal or switch to a second mode to transmit a new frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electronic devices transmit UWB signals simultaneously to obtain information on external objects, then the capability to acquire external object information is improved, but signal interference occurs leading to inaccurate data and signal collisions
Solution Approach 1:
The patent implements periodic action by dividing UWB signal transmission into distinct frames with specific time intervals. Devices transmit signals in organized frames rather than continuously, allowing for structured communication phases including measurement fields and reserved fields, which prevents overlapping transmissions and reduces interference while maintaining information acquisition capability
Solution Approach 2:
The patent applies segmentation by dividing the UWB signal transmission into separate fields within frames. Each frame contains distinct fields (measurement field, reserved field, etc.) that are processed separately. This segmentation allows the system to identify and handle different signal components independently, preventing interference between simultaneous transmissions from multiple devices
2Area of stationary object
If multiple electronic devices transmit UWB signals simultaneously, then the coverage area for obtaining external object information is expanded, but signal collisions occur between the plurality of signals
Solution Approach 1:
The patent uses periodic action by implementing frame-based transmission where devices operate in synchronized time intervals. Each frame contains designated fields for signal transmission, and devices wait for appropriate time slots before transmitting. This periodic structure expands coverage area by allowing multiple devices to operate in the same spatial region while preventing signal collisions through time-division coordination
Solution Approach 2:
The patent introduces an intermediary mechanism through the use of reserved fields and frame structures that mediate between multiple transmitting devices. These intermediary elements act as coordination protocols that manage signal transmission timing and prevent direct collisions, allowing expanded coverage while maintaining signal integrity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively avoids interference between multiple UWB signals, enabling accurate acquisition of information on external objects by distinguishing between different signal states and adjusting the operational mode of the UWB circuit accordingly.
Implementation Method 1
An electronic device may transmit a signal to obtain information on an external object and receive a reflected signal
Data Source
AI summary
An electronic device includes an ultra-wide band (UWB) circuit, and at least one processor comprising a controller of UWB circuit. The at least one processor is configured to transmit, through UWB circuit operating in a first mode, a first signal for a first field in a first frame, transmit, through UWB circuit operating in the first mode, a second signal including designated information for a second field in the first frame, receive, through UWB circuit operating in the first mode, a first reflected signal related to the first signal and a second reflected signal related to the second signal, respectively, caused by an external object, according to a state of the designated information identified from the second reflected signal, obtain information on the external object based on the first reflected signal or transmit a second frame through UWB circuit operating in a second mode.