PDCCH Reliability via Multi-Beam DCI Reception
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Solution Overview
Problem
In 5G New Radio (NR) systems, especially at frequencies above 6 GHz, the rapid attenuation of high-frequency channels necessitates beam-based transmission and reception to ensure coverage. However, the reliability of the physical downlink control channel (PDCCH) is compromised due to the limited use of transmission configuration indication (TCI) states and the reliance on a single optimal received beam.
Innovation Solution
Configuring at least two time domain parameters or received beams for a user equipment (UE) to receive the same downlink control information (DCI) via a physical downlink control channel (PDCCH), allowing the UE to receive the same DCI using different received beams based on different time domain parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beam-based transmission and reception is used to ensure coverage in high-frequency channels, then coverage range is improved, but PDCCH reliability deteriorates due to limited TCI states and reliance on single optimal received beam
Solution Approach 1:
The patent segments the PDCCH reception process by dividing the control information into multiple parts transmitted through different TCI states and beams. The UE receives multiple PDCCH messages corresponding to different beams, each associated with a specific TCI state, allowing distributed reception across multiple spatial paths rather than relying on a single beam.
Solution Approach 2:
The patent introduces a new dimension to beam selection by configuring multiple TCI states with different beam directions simultaneously. Instead of selecting one optimal beam, the system enables the UE to monitor multiple beams in different spatial dimensions, effectively adding a multi-dimensional reception capability that improves reliability without sacrificing coverage.
2Device complexity
If only one TCI state is activated for each CORESET, then device complexity is reduced, but PDCCH reliability deteriorates when multiple TRPs or panels are involved
Solution Approach 1:
The patent makes the TCI state configuration universal by allowing a single CORESET to be associated with multiple TCI states simultaneously. This multi-functional configuration enables the same control resource set to support multiple beams and TRPs, eliminating the need for separate CORESET configurations for each beam while maintaining enhanced reliability.
Solution Approach 2:
The patent changes the parameter of TCI state activation from a single-state per CORESET limitation to a multi-state configuration. By modifying the activation mechanism to allow multiple TCI states to be enabled simultaneously for the same CORESET, the system achieves both reduced configuration complexity and improved reliability through unified multi-beam support.
3Reliability
If multiple TCI states are configured for the same CORESET, then PDCCH reliability is improved through multi-beam reception, but device complexity increases due to additional configuration and processing requirements
Solution Approach 1:
The patent merges multiple TCI state configurations into a single unified CORESET structure. Instead of creating separate CORESETs for each beam, the system combines multiple TCI states within one CORESET, allowing the UE to process and receive multiple beams through a single control resource set. This merging approach improves reliability while minimizing the increase in device complexity by consolidating rather than multiplying the configuration structure.
Data Source
AI summary
A method for communication processing performed by a network device may include: configuring at least one of at least two time domain parameters or at least two received beams for a user equipment (UE) to receive the same downlink control information (DCI), where each of the at least two time domain parameters includes a time domain position; and sending the DCI to the UE via a physical downlink control channel (PDCCH) on the basis of the at least two time domain parameters.