Wireless Radar Resource Allocation for Interference Mitigation
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Solution Overview
Problem
Radar operations in wireless devices operating on the same frequencies as wireless communication systems can cause interference, particularly in unlicensed frequency bands, affecting both radar and communication systems, and existing methods like SRSs in 5G NR have limitations in accuracy and interference mitigation.
Innovation Solution
Implementing a system where wireless devices receive a grant for communication resources based on a random access message, allowing radar operations to be coordinated and mitigating interference by using ZC-,m- or gold sequences and SRS signals, with controlled resource allocation and sequence selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radar operations are performed by wireless devices on the same frequency band as wireless communication systems, then radar sensing capability is enabled, but interference is caused to both radar and communication systems
Solution Approach 1:
The frequency band is segmented into different resource pools (communication resources and sensing resources) that are separately allocated and managed. The network entity divides available time-frequency resources into distinct pools for communication and radar sensing operations, allowing both functions to operate simultaneously without interference.
Solution Approach 2:
The network entity acts as an intermediary that coordinates and manages resource allocation between communication and radar sensing operations. It receives random access messages from wireless devices, determines their radar operation needs, and allocates appropriate resources from the sensing resource pool, thereby mediating between communication and radar requirements.
2Adaptability or versatility
If multiple wireless devices perform radar operations simultaneously, then radar coverage and functionality are enhanced, but mutual interference between radar operations increases
Solution Approach 1:
Resources are segmented into individual allocations for each wireless device performing radar operations. Each device receives dedicated time-frequency resources from the sensing resource pool, preventing mutual interference while enabling multiple devices to conduct radar operations simultaneously.
Solution Approach 2:
The resource allocation is dynamic and adaptive, with the network entity continuously managing the sensing resource pool based on current system conditions and device requirements. Resources can be reallocated as needed to optimize performance and minimize interference.
3Productivity
If random access messages are used for radar operation requests, then resource allocation efficiency is improved, but accuracy of radar operation coordination may be reduced
Solution Approach 1:
The system incorporates feedback mechanisms where wireless devices report their radar operation requirements and results to the network entity. The network entity uses this feedback to refine future resource allocations and improve coordination accuracy while maintaining efficient random access-based resource distribution.
Data Source
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AI summary
There is provided radar operation in a wireless communication system. A method comprises transmitting a random access message for one or more communication resources for a radar operation of a wireless device of a wireless communication system, receiving a grant for at least one communication resource for the radar operation of the wireless device, selecting a radar sequence for generating a radar signal, and transmitting the radar signal using the selected radar sequence in the communication resource.