Spatial Resource Pool Configuration for Sidelink Concurrent Transmissions
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource pools for sidelink communications, particularly in supporting multiple concurrent transmissions, which affects throughput and reliability in scenarios like V2X and D2D communications.
Innovation Solution
The method involves configuring multiple resource pools with sets of frequency, time, and spatial resources, allowing UEs to autonomously select spatial resources and DMRS patterns for sidelink communications, and using co-scheduling information for rate-matching and interference mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single resource pool is used for sidelink communication, then resource management is simple, but the system cannot support multiple concurrent transmissions effectively
Solution Approach 1:
The patent divides the resource pool into multiple spatial resource pools, each associated with different antenna ports. This segmentation allows multiple UEs to simultaneously access different spatial resources, enabling concurrent transmissions while maintaining organized resource management. The base station configures multiple spatial resource pools with distinct antenna port assignments, resolving the contradiction between supporting multiple transmissions and maintaining management simplicity.
2Productivity
If multiple spatial resources are allocated for concurrent transmissions, then throughput increases, but interference management becomes more difficult
Solution Approach 1:
The patent applies local quality by assigning different antenna ports to different spatial resource pools, creating localized spatial separation for different transmissions. Each spatial resource pool is optimized for specific antenna port configurations, allowing concurrent transmissions to occur in different spatial domains with reduced mutual interference. This resolves the contradiction by providing localized spatial differentiation rather than uniform resource allocation.
3Adaptability or versatility
If autonomous spatial resource selection is enabled at UE, then scheduling flexibility increases, but resource coordination complexity increases
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously select spatial resources from the configured spatial resource pools based on their transmission requirements. The base station provides the configuration of available spatial resource pools with antenna port information, and individual UEs independently make selection decisions without requiring complex centralized coordination for each transmission. This resolves the contradiction by distributing the selection intelligence to individual UEs while maintaining overall system coordination through the pre-configured spatial resource pools.
Data Source
AI summary
Methods, systems, and devices for sidelink wireless communications are described in which multiple resource pools are available for sidelink communications. Each resource pool may include a set of frequency domain resources, a set of time domain resources, and one or more subsets of available spatial resources. A transmitting user equipment (UE) may select a first spatial resource of a first resource pool for the sidelink communication, and determine a demodulation reference signal (DMRS) pattern for the sidelink communications based on the selected first spatial resource of the first resource pool. The transmitting UE may then transmit the sidelink communication and DMRS to a receiving UE using the first spatial resource of the first resource pool. The receiving UE may identify the DMRS and use the DMRS to demodulate the sidelink communication of the transmitting UE.