Quasi-Co-Location Reference Signal Configuration for PDCCH-PDSCH Scheduling
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Solution Overview
Problem
In high-frequency beam communications, when the interval between the physical downlink control channel (PDCCH) and the aperiodic channel state information reference signal (AP-CSI-RS)/physical downlink shared channel (PDSCH) is less than a predetermined threshold, resource waste occurs due to the constant transmission of default quasi-co-location reference signals, and there is a lack of clear definition for selecting the determination mode of these reference signals.
Innovation Solution
A method for obtaining quasi-co-location information is proposed, where a communication node acquires the number x and/or the determination mode of quasi-co-location reference signal sets based on first information, which includes various parameters such as scheduling information, TCI state mapping table data, and CORESET group information, to determine the appropriate quasi-co-location reference signals for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple default quasi-co-location reference signal sets are used for scheduling interval less than threshold, then coverage and reliability are improved, but resource waste increases
Solution Approach 1:
The patent applies dynamics by making the number of default quasi-co-location reference signal sets configurable and adaptable. The system allows dynamic adjustment of the parameter indicating the number of reference signal sets based on scheduling intervals and channel conditions, enabling the network to optimize between coverage/reliability and resource efficiency in different scenarios rather than using a fixed number of sets
Solution Approach 2:
The patent changes parameters by introducing configurable parameters that control the number of default quasi-co-location reference signal sets and their selection criteria. The system modifies the behavior of reference signal transmission based on parameter values that reflect scheduling interval thresholds and channel state, allowing flexible adjustment of resource allocation to match actual communication needs
2Productivity
If clear definition for determination mode selection is provided, then system performance is improved, but device complexity increases
Solution Approach 1:
The patent uses parameter changes to define determination modes through configurable parameters rather than complex procedural logic. By parameterizing the selection criteria for default quasi-co-location reference signal sets, the system achieves clear definition of determination modes while maintaining implementation simplicity through parameter-based control
Data Source
AI summary
Provided are a quasi-co-location information obtaining method, communication node and storage medium. The method of obtaining quasi-co-location information, including: acquiring, by a communication node based on first information, a number x and/or a determination mode of quasi-co-location reference signal sets of a first element; where the first information includes at least one of: information indicated in a downlink control channel that schedules the first element; the number of quasi-co-location reference signal set corresponding to a predetermined codepoint in a transmission configuration indicator (TCI) state mapping table; the number of CORESET group; the maximum number of quasi-co-location reference signal sets corresponding to one codepoint in the TCI state mapping table; or a number of time domain repetition of the first element; the number of quasi-co-location reference signal sets corresponding to a second element.