Bundled Radar Reference Signal Collision Avoidance in Wireless Systems
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing collisions between uplink/downlink wireless communication signals and bundled radar reference signals, which can disrupt phase coherence and affect sensing accuracy.
Innovation Solution
Implementing collision avoidance techniques by detecting collisions between wireless communication signals and bundled radar reference signals, and either refraining from transmitting the communication signal or maintaining phase coherence by synchronizing transmit power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless communication signals are transmitted during gaps between bundled radar reference signals, then communication productivity is improved, but phase coherence is disrupted and sensing accuracy deteriorates
Solution Approach 1:
The system performs preliminary detection of potential collisions between communication signals and radar reference signals before transmission occurs. By identifying time gaps between radar signals in advance, the system can pre-plan communication transmissions to avoid phase coherence disruption, thereby maintaining both productivity and sensing accuracy.
Solution Approach 2:
The system implements feedback mechanisms where the UE and network node continuously monitor the transmission timeline of radar reference signals. Based on this feedback information about signal scheduling and timing, the system dynamically adjusts communication transmission decisions to avoid collisions, ensuring phase coherence is maintained while maximizing communication efficiency.
2Measurement precision
If collision avoidance operations are implemented by refraining from transmission, then phase coherence is maintained and sensing accuracy is improved, but communication productivity decreases
Solution Approach 1:
The system dynamically adjusts transmission behavior based on real-time detection of radar signal scheduling. Rather than statically avoiding all potential collisions, the system flexibly identifies safe transmission windows where communication signals can be sent without disrupting radar phase coherence, optimizing the balance between productivity and sensing accuracy through adaptive decision-making.
3Reliability
If collision detection and avoidance operations are implemented, then phase coherence is maintained, but device complexity increases
Solution Approach 1:
The collision detection and avoidance mechanisms leverage existing multi-functional capabilities already present in the UE and network node infrastructure. By utilizing existing signal processing, scheduling, and coordination functions for dual purposes (both communication and radar operations), the system avoids adding separate dedicated complexity while still achieving reliable phase coherence maintenance.
Data Source
AI summary
Disclosed are techniques for wireless sensing. In an aspect, a network node detects a collision between at least one wireless communication signal scheduled to be transmitted by the network node and two or more bundled radar reference signals scheduled to be transmitted by the network node, wherein the at least one wireless communication signal is scheduled to be transmitted during a gap between a first radar reference signal and a second radar reference signal of the two or more bundled radar reference signals; performs a collision avoidance operation based on detection of the collision, and transmits the two or more bundled radar reference signals.