Sidelink UE Scheduling Spatial Division Multiplexing Multiple TRPs
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Solution Overview
Problem
Wireless communication systems face inefficiencies in sidelink communications due to poor resource utilization, leading to degraded efficiency and increased latency, particularly in scenarios like vehicle-to-everything (V2X) communications where multiple unicast connections overburden resources.
Innovation Solution
A receiving user equipment (UE) with multiple transmission-reception points (TRPs) schedules spatial division multiplexing (SDM) communications by measuring signal quality across TRPs and coordinating transmitting UEs to use a shared set of resources, optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple unicast connections are established in sidelink communications, then communication coverage and connectivity are improved, but resource utilization deteriorates and latency increases
Solution Approach 1:
The patent combines multiple unicast connections into a single multicast connection. The receiving UE identifies multiple transmitting UEs and establishes one multicast connection that carries data from all identified transmitters, merging what would otherwise be separate unicast resources into a shared multicast resource pool, thereby improving resource utilization while maintaining connectivity to multiple sources
Solution Approach 2:
The multicast connection serves multiple functions simultaneously: it provides communication with multiple transmitting UEs, enables spatial division multiplexing reception, and optimizes resource usage across the group. This multi-functional approach allows a single connection type to replace multiple specialized unicast connections
2Reliability
If multiple unicast connections are established in sidelink communications, then communication coverage is improved, but communication efficiency deteriorates
Solution Approach 1:
Multiple unicast connections are merged into a single multicast connection, reducing the overhead of maintaining separate connection protocols and resource allocations. The receiving UE identifies multiple transmitting UEs and establishes one multicast connection that carries data from all identified transmitters, improving communication efficiency while preserving coverage
Solution Approach 2:
The receiving UE autonomously performs measurements on multiple transmitting UEs, identifies candidates for spatial division multiplexing, and establishes the multicast connection without requiring network coordination. This self-service approach reduces signaling overhead and improves communication efficiency by enabling autonomous optimization at the UE level
3Productivity
If spatial division multiplexing is implemented with multiple TRPs, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The receiving UE autonomously performs measurements on multiple transmitting UEs using its multiple TRPs, identifies candidates for spatial division multiplexing based on measurement criteria, and establishes the multicast connection without requiring network coordination. This self-service approach reduces signaling overhead and manages complexity by enabling autonomous optimization at the UE level
Solution Approach 2:
The system changes the operational parameters of the receiving UE by enabling it to perform measurements and identify transmitting UEs based on specific measurement criteria. The receiving UE determines whether to establish a multicast connection based on whether identified transmitting UEs meet the measurement criteria, dynamically adjusting system behavior based on measured conditions
Data Source
AI summary
Methods and devices for wireless communications are described. A first user equipment (UE) may establish a first sidelink connection with a second UE and a second sidelink connection with a third CE. The first UE may receive an indication of a first set of transmission resources for the second UE to use to transmit to the first UE. The first UE may transmit an indication of a second set of transmission resources for the second UE to use to transmit to the first UE, the second set of transmission resources identified by the first UE based at least in part on comparing signals received using the first transmission reception point with signals received using the second transmission reception point. The first UE may receive a data message from the second UE on the second set of transmission resources.