Multi-TRP Semi-Persistent Scheduling Configuration Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-transmission/reception point (TRP) wireless communication systems, dynamic radio conditions, spectrum utilization, and traffic loading pose challenges for optimizing downlink (DL) communications, particularly in transitioning between different TRP clusters to ensure reliable and efficient data transmission.
Innovation Solution
The system implements semi-persistent scheduling (SPS) mechanisms, where user equipment (UE) receives DL SPS configuration information and downlink control information (DCI) to activate and manage DL communications across multiple TRPs, allowing for dynamic clustering and scheduling adjustments to optimize resource allocation and minimize overlap or alignment of transmission times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling is configured for multiple TRPs with overlapping transmissions, then resource utilization and throughput are improved, but interference management and scheduling complexity increase
Solution Approach 1:
The patent segments the SPS configuration into separate configurations for each TRP (first SPS configuration for first TRP, second SPS configuration for second TRP). Each configuration can be independently activated and managed, allowing the system to handle multiple TRPs without increasing overall scheduling complexity. This segmentation enables selective activation of TRPs based on channel conditions while maintaining manageable configuration overhead.
Solution Approach 2:
The patent implements dynamic TRP selection where the UE can be configured with multiple SPS configurations but only activates one at a time based on channel conditions. The network can dynamically switch between different TRP configurations by activating different SPS configurations, allowing adaptive response to changing radio conditions without requiring complex simultaneous scheduling of multiple TRPs.
2Reliability
If SPS configurations are activated for multiple TRPs simultaneously, then link reliability is improved through diversity, but resource coordination and transmission timing alignment become more difficult
Solution Approach 1:
The patent applies local quality by configuring each TRP with its own specific SPS parameters (different time resources, frequency resources, or modulation schemes). Each TRP's SPS configuration is optimized for its local channel conditions rather than using a unified configuration. This allows the system to exploit spatial diversity for improved reliability while keeping each TRP's resource allocation simple and independent.
Solution Approach 2:
The patent uses periodic SPS transmissions from multiple TRPs where each TRP transmits periodically according to its own SPS configuration. The periodic nature allows the UE to predict transmission patterns from different TRPs and process them systematically, improving reliability through repeated transmissions while maintaining simple resource coordination through regular periodic intervals.
3Reliability
If dynamic TRP clustering is implemented to adapt to radio conditions, then communication reliability is improved, but configuration overhead and signaling complexity increase
Solution Approach 1:
The patent prepares multiple SPS configurations in advance (first SPS configuration, second SPS configuration) corresponding to different TRPs and channel conditions. These configurations are pre-configured with appropriate parameters for various scenarios. When channel conditions change, the network simply activates the pre-prepared configuration that matches the current conditions, avoiding the need for extensive real-time signaling and reducing overhead.
Solution Approach 2:
The patent changes SPS parameters (such as time resources, frequency resources, or spatial parameters) based on detected channel conditions. The UE monitors radio conditions and triggers activation of different SPS configurations when threshold conditions are met. This parameter-based adaptation allows the system to respond dynamically to changing conditions using simple threshold comparisons rather than complex continuous signaling.
Data Source
AI summary
Wireless communications systems and methods related to serving user equipment devices (UEs) using downlink (DL) semi-persistent scheduling (SPS) in a multi-transmission/reception point (multi-TRP) environment.