Multi-PDSCH Reception via QCL Beam Configuration
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Solution Overview
Problem
In wireless communication systems, particularly in next-generation mobile communication systems, there is a challenge in efficiently managing and receiving multiple physical downlink shared channels (PDSCHs) with varying quasi co-location (QCL) sources and beam change requirements, leading to ambiguity in reception beam configuration and potential communication reliability issues.
Innovation Solution
A method and device for receiving multiple PDSCHs by transmitting UE capability information related to supported reception beams, configuring resources based on quasi co-location information for spatial parameters, and scheduling PDSCHs after a required time, allowing for simultaneous reception and overlap of PDSCHs even when TCI information differs across beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCHs are scheduled with different QCL sources to increase data throughput, then productivity is improved, but reliability deteriorates due to beam configuration ambiguity and reception failures
Solution Approach 1:
The patent applies preliminary action by requiring the network to pre-configure QCL source information and beam change timing parameters before scheduling multiple PDSCHs. The UE uses these pre-configured parameters to determine reception beams in advance, eliminating configuration ambiguity during actual reception and ensuring reliable multi-beam operation
2Reliability
If beam change time is extended to ensure proper QCL information application, then reliability is improved, but loss of time increases due to delayed PDSCH scheduling
Solution Approach 1:
The patent applies parameter changes by introducing configurable beam change timing parameters that define the minimum time interval between PDCCH reception and corresponding PDSCH reception. This parameter allows the system to optimize the balance between reliable beam switching and scheduling efficiency, with the network configuring appropriate timing based on UE capabilities and channel conditions
3Productivity
If multiple reception beams are supported simultaneously to receive PDSCHs from multiple base stations, then productivity is improved, but device complexity increases due to multiple beam management requirements
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine its reception beam configuration based on pre-configured QCL source information and beam change timing parameters. The UE independently manages multiple beam switching operations without requiring complex network coordination for each beam change, reducing overall system complexity while maintaining multi-beam capability
Data Source
AI summary
Presented in the present specification are a method for transmitting and receiving a plurality of PDSCHs in a wireless communication system, and a device therefor. Particularly, a method performed by a user equipment (UE) comprises the steps of: transmitting UE capability information related to the number of reception beams that can be supported simultaneously; receiving a plurality of physical downlink control channels (PDCCHs) including information for scheduling a PDSCH; and receiving a plurality of PDSCHs on the basis of the plurality of PDCCHs, wherein each of the plurality of PDSCHs can be received, on the basis of the UE capability information related to supporting one receiving beam, in resources set on the basis of a requirement time for applying quasi co-location (QCL) information about a spatial parameter.