Terminal TCI State Application for Multi-CC Scheduling
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Solution Overview
Problem
In future radio communication systems, configuring an appropriate Transmission Configuration Indication (TCI) state for Physical Downlink Shared Channels (PDSCHs) transmitted on multiple Component Carriers (CCs) is challenging, which can lead to deteriorated communication quality if not properly managed.
Innovation Solution
A terminal that receives downlink control information (DCI) and applies a common TCI state to PDSCHs when DCI simultaneously schedules PDSCHs across multiple CCs, using specific rules to determine the TCI state, such as applying a default TCI state based on cross-carrier or non-cross-carrier scheduling scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one piece of DCI simultaneously schedules PDSCHs on multiple CCs, then scheduling efficiency is improved, but determining appropriate TCI states for each CC becomes complex
Solution Approach 1:
The patent merges the TCI state determination for multiple CCs by applying a common TCI state from the scheduling CC to all scheduled CCs. Instead of independently configuring TCI states for each CC, the same TCI state information is combined and applied across multiple carriers, simplifying the configuration process while maintaining scheduling efficiency.
Solution Approach 2:
The TCI state configured on the scheduling CC serves a universal function by being applied to multiple scheduled CCs. This multi-functional approach allows a single TCI state configuration to control transmission parameters across multiple component carriers, reducing overall system complexity.
2Reliability
If different TCI states are configured for each CC, then communication quality is improved, but processing complexity increases
Solution Approach 1:
The patent combines the TCI state configuration across multiple CCs by using a common TCI state from the scheduling CC. This merging approach reduces processing complexity while still ensuring appropriate TCI state application for maintaining communication quality on all scheduled carriers.
Solution Approach 2:
The scheduled CCs automatically inherit and apply the TCI state from the scheduling CC without requiring independent TCI state configuration. This self-service mechanism simplifies processing by eliminating the need for separate TCI state management on each scheduled carrier.
3Ease of operation
If a common TCI state is applied to all scheduled CCs, then processing is simplified, but adaptability to specific CC conditions is reduced
Solution Approach 1:
The common TCI state from the scheduling CC serves multiple CCs simultaneously, providing a universal solution that simplifies processing. While this reduces individual CC adaptability, it ensures consistent transmission parameters across all scheduled carriers, which is acceptable when CC conditions are similar or when the scheduling CC represents the dominant transmission characteristics.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information (DCI), and a control section that, when one piece of the DCI simultaneously schedules PDSCHs respectively transmitted on a plurality of component carriers (CCs), applies a TCI state based on a common rule to the PDSCHs. According to one aspect of the present disclosure, it is possible to apply an appropriate TCI state to a PDSCH.