Pre-Emption Indication Mapping for Multi-TRP UE Decoding
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing resource pre-emption indications across multiple transmit receive points (TRPs) in multi-TRP transmission modes, leading to wastage of network resources due to incorrect interpretation of pre-emption indications by user equipment (UEs).
Innovation Solution
The implementation of a pre-emption indication mechanism that associates a pre-emption indication field with quasi co-location (QCL) relationships, transmission configuration indicator (TCI) states, and demodulation reference signal (DMRS) ports, allowing UEs to accurately determine pre-empted resources and adjust decoding processes accordingly, thereby conserving network and UE resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-emption indication is transmitted without association to QCL relationships, then network resources are consumed for transmission, but UE incorrectly interprets pre-emption indications leading to resource wastage
Solution Approach 1:
The patent segments the pre-emption indication mechanism by associating it with specific QCL relationship identifiers. Instead of a single unified indication, the system divides the indication space into multiple segments corresponding to different QCL relationships (e.g., different TRPs or transmission configurations). This allows UEs to precisely identify which specific transmission resources are pre-empted based on their configured QCL relationships, preventing incorrect interpretation and resource wastage while maintaining accurate resource management.
2Productivity
If pre-emption indication is transmitted for all resources, then complete resource information is provided, but decoding efficiency decreases due to processing irrelevant data
Solution Approach 1:
The patent applies local quality by making the pre-emption indication specific to particular QCL relationships rather than applying a uniform indication across all resources. Each UE can selectively process pre-emption indications only for the QCL relationships it is configured with, filtering out irrelevant data. This localized approach improves decoding efficiency by reducing the amount of data UEs must process while ensuring that all relevant pre-emption information for each specific UE configuration is retained and properly handled.
3Measurement precision
If multiple pre-emption indications are transmitted for different QCL relationships, then resource management accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent implements universality by creating a standardized pre-emption indication mechanism that works across multiple QCL relationships using a common signaling framework. The same DCI format and indication structure can be universally applied to different QCL relationships by simply varying the QCL relationship identifier field. This multi-functional approach enables precise identification of pre-empted resources across multiple TRPs and configurations while avoiding the need for separate specialized signaling mechanisms for each relationship, thereby controlling signaling overhead.
Data Source
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AI summary
In some aspects, a user equipment (UE) may receive a configuration that indicates an association between a pre-emption indication field and at least one of: a set of transmission configuration indicator (TCI) states, a set of demodulation reference signal (DMRS) ports, or a set of layers; receive downlink control information (DCI) that includes a pre-emption indication that is indicated as a set of bits in the pre-emption indication field; determine whether the UE is scheduled to receive a communication in one or more preempted resources indicated by the set of bits, via a component carrier associated with the pre-emption indication, and using at least one of: a TCI state included in the set of TCI states, a DMRS port included in the set of DMRS ports, or a layer included in the set of layers; and decode the communication based at least in part on the determination.