PPDU Frequency Band Stitching With Inactive Gaps for UWB Switching
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Solution Overview
Problem
Current frequency band stitching solutions for UWB devices with low costs and low power consumption are inadequate in meeting frequency switching requirements, limiting their sensing performance due to the limitations of analog-to-digital converters.
Innovation Solution
Introduce an inactive segment between frequency bands in the PPDU transmission to allow for sufficient time gaps for frequency switching, enabling frequency band adjustment or switching, and utilize control messages to manage frequency band stitching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple frequency bands are stitched together to form a wider bandwidth for improved sensing performance, then sensing precision is improved, but frequency switching cannot be completed due to insufficient time gap
Solution Approach 1:
The patent segments the frequency band stitching process by introducing an inactive segment between active segments. This segmentation allows the system to divide the transmission into manageable portions with transition periods, enabling frequency switching to occur during the inactive segment without compromising the overall sensing performance achieved through multi-band stitching.
Solution Approach 2:
The patent applies preliminary action by pre-planning and pre-scheduling the inactive segments at specific positions within the packet structure. This allows the system to prepare for frequency switching in advance, ensuring that sufficient time gaps are allocated before frequency band transitions are required, thereby resolving the time constraint issue.
2Adaptability or versatility
If an inactive segment is introduced between frequency bands to enable frequency switching, then frequency switching requirement is met, but packet duration increases
Solution Approach 1:
The patent implements dynamics by making the inactive segment configuration flexible and adaptive. The system can dynamically adjust the presence, position, and duration of inactive segments based on the specific frequency switching requirements of different transmission scenarios. This allows the packet structure to adapt to varying frequency band stitching needs while minimizing unnecessary duration extensions.
Data Source
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AI summary
This application relates to a PPDU transmission method based on frequency band stitching and a related apparatus. The method includes: A communication apparatus generates and sends a PPDU, where the PPDU includes a first segment and a second segment, transmission frequency bands of the two segments are different, and an inactive segment exists between the two segments; and the communication apparatus does not transmit a UWB pulse within duration of the inactive segment. According to this application, a frequency switching requirement can be met. This application is applied to a UWB-based WPAN system, a sensing system, or the like, including 802.15 series protocols, for example, 802.15.4ab or a next-generation standard of 802.15.4ab. This application may be further applied to a WLAN system supporting 802.11 series protocols such as a next-generation protocol of 802.11ax like 802.11be, Wi-Fi 7, or EHT, a next-generation protocol of 802.11be like Wi-Fi 8 or UHR, or Wi-Fi AI.