Multi-TRP Scheduling Threshold Report for Beam Preparation
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Solution Overview
Problem
In multi-transmit/receive point (TRP) wireless communication networks, user equipment (UE) faces challenges in efficiently preparing multiple receive beams, which can lead to delays in data reception, especially in 5G NR systems, due to the increased complexity and time required for beam preparation compared to single TRP scenarios.
Innovation Solution
The UE provides a report to the base station with multiple threshold scheduled offsets associated with different transmission configuration indication (TCI) states, allowing the base station to adjust the scheduling of transmission and reception beams, ensuring the UE has sufficient time to prepare the necessary receive beams based on the received TCI and time-offset information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE prepares multiple receive beams for multi-TRP communication, then the communication reliability is improved, but the time required for beam preparation increases
Solution Approach 1:
The UE performs beam preparation in advance based on predicted TRP activation patterns. The network configures multiple TCI states beforehand, and the UE pre-prepares corresponding receive beams before the TRPs are actually activated, eliminating the need for time-consuming beam preparation during data reception
Solution Approach 2:
The system dynamically adapts beam preparation strategies based on traffic conditions and TRP activation patterns. The network can flexibly configure the number and type of TCI states (quasi-co-located or non-quasi-co-located) depending on whether TRPs are activated simultaneously or sequentially, optimizing beam preparation time for each scenario
2Productivity
If the base station schedules transmission with short time-offset, then the system productivity is improved, but the UE cannot prepare receive beams in time
Solution Approach 1:
The UE pre-prepares receive beams based on predicted TRP activation before the scheduled data reception time. By configuring multiple TCI states in advance and predicting which TRPs will be activated, the UE ensures beams are ready before the PDSCH reception, allowing the network to use aggressive scheduling with minimal time-offset without compromising reception reliability
Solution Approach 2:
The patent replaces the traditional mechanical timing constraint system with an intelligent prediction and preparation system. Instead of relying on fixed time-offset thresholds, the system uses TCI state configuration and beam prediction to dynamically determine adequate preparation time, allowing more flexible and efficient scheduling
3Adaptability or versatility
If the UE configures multiple TCI states for multi-TRP, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal beam management framework where a single set of TCI states can serve multiple TRPs regardless of their activation patterns. The same TCI state configuration mechanism handles both simultaneous and sequential TRP activation scenarios, simplifying UE implementation while maintaining full adaptability to different multi-TRP deployment configurations
Data Source
AI summary
A configuration is disclosed to enable a UE to determine and/or prepare Rx beams prior to downlink reception in multi-TRP operation. The apparatus sends, to a first TRP, a report indicating a plurality of threshold scheduled offsets. Each threshold scheduled offset associated with a different number of TCI states. The apparatus receives, from the first TRP, DCI including a TCI and a time-offset. The TCI comprising at least one TCI state. Each TCI state indicating a Tx beam for a TRP of a set of TRPs. The set of TRPs including the first TRP. The apparatus determines at least one Rx beam based on at least one of the received TCI, the time-offset, or one or more of the plurality of threshold scheduled offsets. The apparatus receives, based on the received time-offset, a PDSCH from each TRP of the set of TRPs through the determined at least one Rx beam.