UWB Time Resource Reuse Through Inter-Cluster Synchronization
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Solution Overview
Problem
Existing UWB communication systems face inefficiencies in utilizing time resources, leading to suboptimal utilization and potential interference and collisions in spatial reuse.
Innovation Solution
Implementing methods and devices for spatial reuse of time resources through inter-cluster synchronization and common ranging blocks, utilizing UWB devices to transmit and receive poll messages with specific timestamp and index information for efficient time resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time resources are reused across multiple clusters, then resource utilization efficiency improves, but interference and collisions between clusters increase
Solution Approach 1:
The system segments clusters into different groups and assigns specific time resources (ranging rounds) to each group. This segmentation allows time resource reuse across groups while preventing interference within groups, as each group operates in dedicated time slots. The poll message includes group identification information to enable this segmented resource allocation.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by adding group identification to the traditional time-resource mapping. Instead of simply reusing time resources across all clusters, the system creates a multi-dimensional resource space where time resources are reused across different group dimensions, enabling spatial-temporal resource reuse without collision.
2Productivity
If inter-cluster synchronization is implemented using common ranging blocks, then spatial reuse of time resources improves, but system complexity increases
Solution Approach 1:
The system performs preliminary synchronization by having initiator anchors transmit poll messages with pre-configured block index and round index information. This preliminary action establishes a common time reference before actual ranging operations, simplifying the synchronization process and enabling efficient spatial reuse without requiring complex real-time coordination.
Solution Approach 2:
The poll message serves as an intermediary carrier that conveys synchronization information (block index, round index, timestamp) from initiator anchors to other devices. This intermediary mechanism simplifies inter-cluster synchronization by encapsulating all necessary timing information in a single message structure, reducing system complexity.
3Measurement precision
If poll messages include detailed index and timestamp information, then time resource management precision improves, but message overhead increases
Solution Approach 1:
The poll message is designed as a multi-functional structure that simultaneously carries identification information (block index, round index), timing information (timestamp), and cluster/group identification. This universal message structure achieves precise time resource management without requiring separate messages for each function, thereby minimizing overall message overhead.
Data Source
AI summary
The disclosure provides a method for spatial reuse of time resources. A method performed by a UWB device includes receiving, from a first initiator anchor, a first poll message to initiate a DL-TDoA for a first cluster to which the first initiator anchor belongs, the first initiator anchor providing a time reference for an inter-cluster synchronization; performing the inter-cluster synchronization for using a common ranging block, based on the first poll message; and transmitting a second poll message to initiate a DL-TDoA for a second cluster to which the UWB device belongs. The first poll message is transmitted in a first ranging round in the common ranging block, and the first poll message is transmitted in a second ranging round in the common ranging block.