UWB Ranging Initialization Using ADV-RESP and SOR Frames
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Solution Overview
Problem
Existing UWB technologies face challenges in accurately determining the number of responders participating in multi-millisecond (MMS) ranging, leading to potential frame collisions and inefficiencies during the initialization and setup phase.
Innovation Solution
The initiator receives an advertising-response (ADV-RESP) frame from responders indicating the number of participants, allowing it to transmit a start of ranging (SOR) frame accordingly, using various explicit or implicit indications to manage frame collisions and optimize the ranging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the initiator transmits SOR frame immediately after receiving ADV-RESP frame, then the ranging process starts quickly, but frame collisions occur between SOR frame and subsequent ADV-RESP frames
Solution Approach 1:
The initiator performs preliminary action by transmitting the SOR frame in advance before all ADV-RESP frames are received. This resolves the contradiction by starting the ranging process early (improving speed) while the SOR frame is designed to accommodate multiple responders, preventing frame collisions (maintaining reliability).
Solution Approach 2:
The ranging process is segmented into initialization/setup phase and measurement phase. The SOR frame transmission occurs at the boundary between these phases, allowing the initiator to prepare the ranging structure in advance while responders continue to join sequentially without causing collisions.
2Reliability
If the initiator waits for all ADV-RESP frames before transmitting SOR frame, then frame collisions are avoided, but the ranging process starts later
Solution Approach 1:
The initiator transmits the SOR frame as a preliminary action before the measurement phase begins, rather than waiting for all responders to join. This reduces the setup time while the frame structure ensures reliability by accommodating subsequent responder joins without collisions.
Solution Approach 2:
The SOR frame structure is designed to be dynamic, allowing responders to join the ranging process after the frame is transmitted. This resolves the contradiction by enabling early SOR transmission (reducing time loss) while maintaining frame reliability through dynamic responder accommodation.
3Measurement precision
If multiple ADV-RESP frames are transmitted to indicate multiple responders, then accurate participant counting is achieved, but signaling overhead increases
Solution Approach 1:
Multiple responder indications are merged into a single SOR frame that can accommodate multiple responders. This resolves the contradiction by maintaining accurate participant counting (measurement precision) while reducing signaling overhead by consolidating multiple potential frames into one.
Solution Approach 2:
The SOR frame is designed with universal functionality to handle multiple responders simultaneously, rather than requiring separate frames for each responder. This achieves accurate participant counting while minimizing signaling overhead through multi-functional frame design.
Data Source
AI summary
The present disclosure provides a communication method and apparatus, an electronic device, and related products. The communication method includes: receiving, by an initiator, an advertising-response frame from a responder, where the ADV-RESP frame indicates a number N of the responder to participate in multi-millisecond ranging, N≥1; and transmitting, by the initiator, a start of ranging frame to the responder according to the ADV-RESP frame, where the SOR frame is used to provide a time offset at which a first range-measurement cycle to start. Through the above solution, the initiator acquires the number of the responder to participate in MMS ranging through the ADV-RESP frame transmitted by the responder, and then transmits the SOR frame according to the number of the responder to participate in MMS ranging, thus, the initiator acquires the number of the responder to participate in MMS ranging once a responder transmits the ADV-RESP frame to the initiator.