Multi-TRP CORESET and PUCCH Grouping for RRC-Delayed TCI Switching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing transmission configuration indicator (TCI) state switching due to the need for a processing delay in radio resource control (RRC) activation, leading to inefficiencies in downlink and uplink channel transmissions.
Innovation Solution
Implementing a method where a user equipment (UE) receives a RRC activation command in a first slot, waits for an RRC processing delay, and then switches to a target TCI state in a second slot, allowing for the UE to transmit a TCI switch complete indication to expedite the switching process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RRC activation command is applied immediately without processing delay, then TCI state switching speed is improved, but system reliability deteriorates due to insufficient processing time
Solution Approach 1:
The patent applies preliminary action by introducing a processing delay period between receiving the RRC activation command and actually switching to the target TCI state. This allows the UE to prepare and verify the switching parameters in advance, ensuring reliable execution while maintaining a defined switching timeline.
Solution Approach 2:
The patent changes the parameter of processing time by introducing a configurable processing delay parameter. This parameter can be adjusted to balance between switching speed and processing requirements, allowing the system to adapt to different operational scenarios while maintaining reliability.
2Reliability
If processing delay is increased to ensure reliable TCI state switching, then system reliability is improved, but channel transmission efficiency deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the UE signals completion of TCI state switching to the gNodeB. This feedback allows the network to confirm reliable switching while optimizing the processing delay duration, ensuring that channels can be transmitted efficiently once switching is confirmed complete.
Solution Approach 2:
The patent makes the processing delay dynamic by allowing it to be configured based on actual switching conditions and network requirements. The delay can be extended or reduced dynamically to balance reliability and efficiency in different operational contexts.
3Productivity
If TCI state switching is expedited without proper processing time, then channel transmission efficiency is improved, but switching accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by requiring the UE to complete processing and verification of TCI switching parameters before actually executing the channel transmission. This ensures accuracy is maintained while still enabling efficient switching through optimized processing delay parameters.
Data Source
AI summary
Systems, devices, and techniques for wireless communications based on one or more transmission configuration indicator (TCI) states are described. A described technique performed by a user equipment (UE) includes receiving a first downlink channel based on a current TCI state; receiving a physical downlink shared channel (PDSCH) in a first slot, the PDSCH carrying a radio resource control (RRC) activation command in the first slot, the RRC activation command indicating a switch to a target TCI state; waiting until an end of a switching period triggered by the RRC activation command to use the target TCI state, the switching period being based on a RRC processing delay; and receiving, based on the end of the switching period, a second downlink channel based on the target TCI state in a second slot.