UE PDSCH Reception Control Without CORESET #0
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Solution Overview
Problem
In future radio communication systems, if the control resource set (CORESET #0) is not configured based on the MIB, user terminals (UEs) may not appropriately control the receiving process of the downlink shared channel due to uncertainty in the frequency domain allocation of the PDSCH scheduled by given DCI.
Innovation Solution
The user terminal controls RB numbering and the maximum number of RBs for PDSCH scheduled by given DCI based on whether CORESET #0 is configured, using either a common CORESET or an initial downlink bandwidth part (BWP) when CORESET #0 is not available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CORESET #0 is not configured based on MIB, then system flexibility is improved, but the terminal cannot appropriately control the receiving process of downlink shared channel
Solution Approach 1:
The patent introduces an intermediary mechanism where the terminal uses fallback assumptions and default configurations to bridge the gap between CORESET #0 unconfiguration and the need for reliable PDSCH reception control. When CORESET #0 is not configured, the terminal applies intermediary rules to determine frequency domain resources and reception parameters.
Solution Approach 2:
The patent applies parameter changes by modifying the terminal's operational parameters based on the configuration status of CORESET #0. When CORESET #0 is absent, the terminal changes its behavior regarding frequency domain resource determination and reception process control to maintain reliability under this alternative condition.
2Device complexity
If CORESET #0 is not configured, then configuration simplicity is improved, but frequency domain specification for PDSCH becomes uncertain
Solution Approach 1:
The patent applies preliminary action by pre-establishing fallback assumptions and default frequency domain specifications before the terminal needs to receive PDSCH. These pre-configured rules enable the terminal to immediately determine frequency domain resources even when CORESET #0 is not configured, avoiding uncertainty.
Solution Approach 2:
The terminal performs self-service by autonomously determining frequency domain specifications using its own internal rules and assumptions when CORESET #0 is unavailable. The terminal independently resolves the frequency domain uncertainty without requiring external configuration or CORESET #0 information.
3Adaptability or versatility
If CORESET #0 is not configured, then implementation flexibility is improved, but reception process control becomes insufficient
Solution Approach 1:
The patent incorporates feedback mechanisms where the terminal continuously monitors its reception capability and adjusts its operations based on whether CORESET #0 is configured. This feedback loop ensures that the terminal maintains appropriate reception process control by adapting its behavior to the actual configuration status.
Data Source
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AI summary
The present invention is designated to appropriately control a receiving process of a downlink shared channel. A terminal according to one aspect of the present disclosure includes a receiving section that monitors a common search space and receives a downlink control information used for scheduling a downlink shared channel, and a control section that controls resource blocks assignable by the downlink control information based on whether a control resource set is configured by a parameter that is in a master information block (MIB).