UWB Session Establishment via Narrow Band Acquisition Packets
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Solution Overview
Problem
Existing UWB communication systems face challenges in collision avoidance and efficient resource utilization, particularly in establishing UWB sessions between devices.
Innovation Solution
A method involving the use of narrow band (NB) acquisition packets (APs) for UWB devices to establish sessions, utilizing both UWB and NB channels for communication, including advertising, device discovery, and connection setup, thereby enabling collision avoidance and efficient use of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UWB devices establish sessions using only UWB channels, then session establishment is direct, but collision and congestion occur in the UWB network
Solution Approach 1:
The patent introduces NB channels as an intermediary for session establishment. Devices first exchange acquisition packets and establish sessions through NB channels, which act as a mediator to avoid direct collisions on UWB channels. This two-channel approach separates the session establishment phase (using NB) from the data transmission phase (using UWB), thereby reducing congestion and collisions in the UWB network while maintaining reliable session establishment.
2Object-affected harmful factors
If UWB devices use NB channels for session establishment, then collision is avoided, but device complexity increases due to dual-channel operation
Solution Approach 1:
The patent segments the communication process into two distinct phases: session establishment phase using NB channels and data transmission phase using UWB channels. This segmentation allows each channel to be optimized for its specific function, with NB handling control-plane operations and UWB handling data-plane operations, thereby reducing overall system complexity despite using dual channels.
Solution Approach 2:
The patent implements dynamic channel selection where devices adaptively switch between NB and UWB channels based on the communication phase. During session establishment, devices dynamically use NB channels to avoid collisions, and after session establishment, they switch to UWB channels for data transmission. This dynamic behavior allows the system to maintain low complexity by only activating the necessary channel for each phase.
3Productivity
If UWB devices broadcast acquisition packets frequently, then session establishment speed is improved, but network congestion increases
Solution Approach 1:
The patent implements periodic acquisition packet broadcasting on NB channels with controlled intervals. Instead of continuous broadcasting, devices transmit acquisition packets at predetermined periodic intervals, which maintains session establishment capability while significantly reducing network congestion and energy consumption compared to frequent or continuous broadcasting.
Solution Approach 2:
The patent performs preliminary session establishment actions through NB channel communication before utilizing UWB channels for data transmission. By completing the session establishment phase in advance using NB channels, devices avoid the need for frequent re-broadcasting on UWB channels, thereby reducing overall network congestion and energy waste while maintaining fast session establishment.
Data Source
Figure 1A
Figure 1B
Figure 2~3A
AI summary
Disclosed is a method for operating a UWB channel together with an NB channel. A method performed by a first UWB device disclosed herein comprises the steps of: generating an NB AP for providing information about a first UWB session used by a first UWB device; and broadcasting the NB AP through the NB channel. The NB AP may be used by a second UWB device to configure a second UWB session.