Multi-TRP Uplink Reporting for Non-Ideal Backhaul Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink reporting techniques for user equipment (UE) when connected to multiple transmission-reception points (TRPs), particularly when backhaul connections between TRPs are non-ideal, leading to limited capacity and reliability.
Innovation Solution
The UE identifies a reporting configuration to transmit separate reports to different TRPs for non-ideal backhaul connections and a single report for ideal backhaul connections, using channel access priority classes (CAPCs) for contention-based channel access and coordinating traffic splits based on latency thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate reports are transmitted to each TRP for non-ideal backhaul connections, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the reporting configuration into multiple independent configurations, each associated with a specific TRP. The UE maintains separate reporting configurations for different TRPs, allowing independent optimization of reporting parameters for each connection. This segmentation enables reliable communication over non-ideal backhaul by ensuring each TRP receives appropriate reporting information without being constrained by a single unified configuration.
Solution Approach 2:
The patent introduces dynamic selection of reporting configurations based on backhaul link conditions. The UE can switch between unified reporting configuration (for ideal backhaul) and separate reporting configurations (for non-ideal backhaul). This dynamic adaptation allows the system to optimize between reliability and complexity based on current network conditions, maintaining reliability when needed while avoiding unnecessary complexity when backhaul conditions permit.
2Device complexity
If a single report is transmitted to one TRP for ideal backhaul connections, then device complexity is reduced, but reliability may deteriorate
Solution Approach 1:
The patent designs the reporting configuration mechanism to serve multiple functions: it can operate as a unified configuration when backhaul conditions are ideal, and as separate configurations when backhaul conditions are non-ideal. This multi-functionality allows the same UE and TRP infrastructure to handle both scenarios appropriately, maintaining reliability across different network conditions without requiring fundamentally different system architectures.
3Productivity
If multiple concurrent wireless connections are established with multiple TRPs, then system capacity is improved, but coordination difficulty increases
Solution Approach 1:
The patent segments the coordination function by associating separate reporting configurations with each TRP connection. This segmentation allows independent management of each wireless connection's reporting parameters, reducing the coordination burden compared to managing a single unified configuration across multiple TRPs. Each TRP can be coordinated independently based on its specific backhaul conditions and requirements.
Solution Approach 2:
The patent enables dynamic changes in reporting configuration parameters based on the number and state of concurrent TRP connections. When multiple connections are established, the system can adjust parameters such as reporting periodicity, resource allocation, and configuration type (unified vs. separate) to optimize system capacity while managing coordination complexity through parameter adaptation rather than structural complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that support uplink reporting techniques for multi transmission-reception point (TRP) transmissions. Various reporting configurations may be provided that allow for user equipment (UE) communications via multiple concurrent wireless connections with multiple TRPs. A UE may identify a reporting configuration and transmit a report (e.g., a buffer status report (BSR) or a power headroom report (PHR)) to one or more of the TRPs based on the identified reporting configuration. The multiple TRPs may have non-ideal backhaul connections and the reporting configuration may allow the UE to transmit separate reports to different TRPs. The different TRPs may then use the separate reports for corresponding communications with the UE. In cases where shared radio frequency spectrum is used for communications, a single channel access priority class (CAPC) for multiple TRPs may be determined for a contention-based channel access procedure.