UE Power Control and Beam Management for Radar–Communication Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently coordinating and reducing interference between communication and radar sensing modules within a user equipment (UE), leading to increased complexity and inefficiency due to separate designs and lack of unified standards, which can result in self-interference and suboptimal resource utilization.
Innovation Solution
A unified standard is developed for joint communication and radar sensing, enabling coordinated resource allocation and interference minimization through beam management and power control, utilizing existing NR communication design principles for radar operations, and facilitating information exchange between modules to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate designs are used for communication and radar sensing modules, then each module can be optimized independently, but device complexity increases and interference between modules occurs
Solution Approach 1:
The patent merges communication and radar sensing modules into a unified system that shares common components including antenna arrays, signal processing units, and control mechanisms. This integration enables coordinated operation between the two functions, reducing overall device complexity while maintaining the ability to optimize each function through dedicated processing paths and parameter configurations.
2Adaptability or versatility
If separate designs are used for communication and radar sensing modules, then independent optimization is possible, but interference between modules increases
Solution Approach 1:
The patent introduces an intermediary coordination mechanism that manages interference between communication and radar sensing modules. This intermediary layer includes a controller that allocates time-frequency resources, adjusts transmission parameters, and coordinates beamforming operations to minimize self-interference while allowing both modules to operate independently with optimized parameters.
Solution Approach 2:
The system employs periodic time-frequency resource allocation patterns where communication and radar sensing operations are scheduled in alternating periods. This periodic coordination enables both modules to access the spectrum independently during their respective time slots while the controller manages transitions and avoids overlapping transmissions that would cause interference.
3Adaptability or versatility
If separate designs are used for communication and radar sensing, then design flexibility is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic resource allocation where the controller can flexibly adjust time-frequency resource assignments based on real-time operational requirements. This dynamic mechanism allows the system to optimize resource utilization by allocating resources to the function that needs them most at any given time, while maintaining design flexibility through configurable parameter settings and adaptable beamforming patterns.
Data Source
AI summary
Methods and apparatuses for power control and beam management to enable coexistence of radar sensing and wireless communication. A method for a UE includes determining a sensing category or characteristics for a sensing application, and selecting a spatial filter for radar sensing transmission or reception based on determined sensing category or characteristics. The method further includes identifying a radar sensing transmission power and transmitting or receiving radar sensing signals using the spatial filter and the identified radar sensing transmission power. The method further includes reporting one of communication blockage, radar sensing beam information, or CSI adapted to the radar sensing beam information to a base station or neighboring UEs.