PDSCH Resource Scheduling for RADAR Interference Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy scheduling mechanisms in wireless communication systems lead to inefficient use of resources due to RADAR interference, causing time/frequency resources to go unused, thereby reducing downlink capacity.
Innovation Solution
A method involving a base station that receives RADAR information and sends scheduling information to avoid interference, using a set of time and frequency resources determined based on RADAR characteristics, such as AOA, frequency, bandwidth, and timing drift, to ensure robust physical downlink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If legacy scheduling mechanisms allocate contiguous time resources for physical downlink transmission, then the transmission structure is simple and easy to implement, but time/frequency resources go unused during RADAR interference periods, reducing downlink capacity
Solution Approach 1:
The patent implements dynamic resource allocation where the base station adjusts time and frequency resources for physical downlink transmission based on received RADAR information. The scheduling mechanism transitions from static contiguous allocation to dynamic non-contiguous allocation, selecting resources that avoid RADAR interference periods while maintaining transmission efficiency. This resolves the contradiction by making the scheduling adaptable to interference conditions rather than fixed.
Solution Approach 2:
The patent changes the parameters of resource allocation by using RADAR information (such as interference patterns, frequency bands, and time periods) to determine which time/frequency resources to allocate or avoid. Instead of always using contiguous resources, the system modifies resource selection parameters based on RADAR characteristics, thereby increasing downlink capacity during non-interference periods while avoiding harmful interference periods.
2Reliability
If resources are shortened to fit before or after RADAR interference, then RADAR interference is avoided, but some time/frequency resources go unused even when not interfering with RADAR, reducing overall efficiency
Solution Approach 1:
The patent segments the time-frequency resource grid into multiple independent allocable units rather than treating the entire slot as a single contiguous block. This allows the base station to select specific non-contiguous resource blocks that avoid RADAR interference while utilizing all available non-interfering resources. The segmentation enables fine-grained resource allocation, improving both interference avoidance and overall resource utilization efficiency.
3Adaptability or versatility
If contiguous time resources are allocated, then scheduling is simple and resource allocation is straightforward, but the system cannot adapt to periodic RADAR interference patterns, leading to wasted resources
Solution Approach 1:
The patent implements a feedback mechanism where the base station receives RADAR information about interference patterns, frequency bands, and time periods. This feedback enables the scheduling mechanism to adapt resource allocation decisions to match actual RADAR behavior. The system continuously adjusts resource selection based on received interference information, achieving adaptability while managing complexity through structured processing of RADAR data.
Data Source
AI summary
A method performed by a base station may comprise: receiving RADAR information; sending scheduling information, wherein the scheduling information includes a set of time and frequency resources associated with a physical downlink transmission that avoid RADAR interference, and wherein the set of time and frequency resources is determined based on the RADAR information; and sending the physical downlink transmission using resources based on the set of time and frequency resources.