PDCCH Repetition Resource Configuration for Multi-TRP Reliability
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Solution Overview
Problem
The challenge in telecommunications is to enhance the reliability and robustness of Physical Downlink Control Channel (PDCCH) transmissions, particularly in multi-Transmission and Reception Point (TRP) deployments, where details on PDCCH repetitions are lacking, and configuring time/frequency resources for repeated PDCCHs with multiple Transmission Configuration Indicator (TCI) states remains an issue.
Innovation Solution
The method involves determining a resource configuration associated with multiple TCI states for PDCCH repetitions, allowing for detection of control information repetitions within a search space using frequency, time, or spatial division multiplexing, and configuring CORESETs and search spaces to improve reliability and robustness by transmitting control information multiple times based on these configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetitions are transmitted multiple times to improve reliability, then the reliability and robustness of control information transmission is improved, but the device complexity and resource configuration complexity increase due to multiple TCI states
Solution Approach 1:
The patent segments the PDCCH transmission by associating different repetitions with different TCI states. Each repetition is independently configured with specific TCI state parameters, allowing the terminal to detect repetitions from multiple transmission points using distinct beam configurations. This segmentation enables reliable detection through diversity while maintaining manageable configuration complexity through structured resource allocation.
Solution Approach 2:
The patent introduces spatial dimensionality by utilizing multiple TCI states corresponding to different transmission points and beam directions. Instead of repeating transmissions in the same spatial dimension, the system distributes repetitions across multiple spatial dimensions (different TCI states), enabling the terminal to detect control information through spatial diversity without proportionally increasing temporal or frequency resource overhead.
2Reliability
If multiple TCI states are configured for PDCCH repetitions to enhance robustness in multi-TRP environments, then the communication reliability is improved, but the difficulty of detecting and measuring control information increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal with multiple TCI states and their associated resource configurations before PDCCH transmission. The network device provides the terminal with a set of configured TCI states and indicates which states to use for repetition detection. This preliminary configuration enables the terminal to efficiently detect repetitions without real-time complexity, as the detection parameters are prepared in advance.
Solution Approach 2:
The patent uses the TCI state configuration as an intermediary mechanism that bridges the network device and terminal device. The TCI states serve as pre-defined templates that encapsulate all necessary detection parameters (beam directions, transmission points, resource allocations). This intermediary structure simplifies the detection process by providing the terminal with ready-to-use configuration templates rather than requiring real-time parameter negotiation or complex signal processing.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises determining, at a terminal device, a resource configuration for control information on a channel between the terminal device and a network device, the resource configuration being associated with a plurality of Transmission Configuration Indicator (TCI) states for the channel; and detecting a plurality of repetitions of the control information on the channel from the network device based on the resource configuration, a TCI state of the plurality of TCI states corresponding to at least one of the plurality of repetitions. Embodiments of the present disclosure can improve reliability and robustness for Physical Downlink Control Channel (PDCCH).