UWB Session Broadcast Signaling for Ranging Block Interference Avoidance
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Solution Overview
Problem
Existing UWB channel usage coordination mechanisms fail to fully address interference between densely deployed UWB networks, as they cannot determine all resources occupied by a session, leading to ongoing network interference.
Innovation Solution
An information transmission method that includes receiving and determining ranging blocks occupied by a session through first and second information in data packets, allowing devices to avoid these blocks during ranging to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a ranging initiator broadcasts a data packet carrying session information (ranging block duration, ranging round duration, UWB channel, preamble code), then other networks can determine occupied ranging rounds and avoid interference, but the mechanism cannot determine all resources occupied by the session, so interference still exists
Solution Approach 1:
The patent segments the session information into multiple components: first information indicating at least one occupied ranging block, and second information indicating that the first information is associated with a plurality of ranging blocks. This segmentation allows the data packet to convey complete resource occupation information across multiple ranging blocks, enabling receiving devices to accurately determine all occupied resources and avoid interference.
Solution Approach 2:
The patent extends the information structure from a single ranging block to multiple ranging blocks by introducing the second information dimension. This dimensional expansion allows the data packet to indicate occupation status across the entire plurality of ranging blocks, providing complete resource occupation information that was previously unavailable.
2Adaptability or versatility
If UWB networks are densely deployed, then more networks can coexist in the same area, but interference between networks increases
Solution Approach 1:
The patent implements a feedback mechanism where ranging initiators broadcast data packets containing session information about occupied ranging blocks. Receiving devices scan these data packets and use the feedback information to determine which ranging blocks are occupied by other sessions, allowing them to select available resources and avoid interference in densely deployed networks.
Solution Approach 2:
The patent applies preliminary action by having ranging initiators broadcast session information before the ranging session actually occurs. This advance notification allows other networks to scan the data packets, determine occupied resources in advance, and select non-interfering ranging blocks before the interference would occur, enabling coexistence in dense deployments.
3Object-affected harmful factors
If devices scan data packets continuously to find available ranging blocks, then they can avoid interference, but power consumption increases
Solution Approach 1:
The patent applies periodic action by having ranging initiators broadcast data packets at specific intervals rather than continuously. Receiving devices can scan for data packets periodically at these broadcast intervals, reducing the total scanning time and power consumption while still obtaining the necessary session information to avoid interference.
Data Source
AI summary
An information transmission method includes receiving, by a first apparatus, a first data packet, where the first data packet includes first information and third information. The first information indicates at least one ranging block is occupied by a session corresponding to the first information. The third information indicates one or more of: an indication of whether the first data packet is periodically broadcast, or a time interval between a sending or receiving moment of the first data packet and a sending or receiving moment of a second data packet. The sending moment of the second data packet is later than the sending moment of the first data packet. The first apparatus determines from among the at least one ranging block, a ranging block that is occupied by the session, based on the first information.