Simultaneous TCI State Activation via MAC CE in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in simultaneously activating downlink control information transmission beams efficiently, particularly in network cooperative communication scenarios.
Innovation Solution
A method and apparatus for effectively providing simultaneous activation of downlink control information transmission beams by a terminal in a wireless communication system. This involves receiving information associated with the activation of transmission configuration indication (TCI) states from a base station via a medium access control (MAC) control element, and activating the TCI state IDs for the control resource set index of each serving cell included in a list for TCI relation with the MAC CE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate activation procedures are used for each serving cell, then beam activation can be performed individually, but the activation process becomes time-consuming and inefficient
Solution Approach 1:
The patent combines multiple separate beam activation procedures into a single unified MAC CE message that can simultaneously activate TCI states across multiple serving cells. This merging approach allows the terminal to receive one activation message instead of multiple separate messages, thereby improving activation efficiency and reducing the time required for beam activation across aggregated cells.
2Productivity
If multiple TCI states are activated simultaneously across multiple serving cells, then beam management efficiency is improved, but the complexity of managing TCI relations increases
Solution Approach 1:
The patent segments the TCI state activation process by introducing a list structure that divides serving cells into manageable groups. Each serving cell in the list is associated with specific TCI state IDs, creating a structured segmentation that simplifies the management of TCI relations across multiple cells while enabling simultaneous activation.
Solution Approach 2:
The patent introduces an intermediary list structure that acts as a mediator between the MAC CE message and the multiple serving cells. This list contains serving cell IDs and their corresponding TCI state IDs, serving as an intermediary mapping that simplifies the complex task of managing TCI relations across multiple cells by providing a structured reference framework.
3Reliability
If individual MAC CE messages are sent for each serving cell, then precise control is maintained, but signaling overhead increases
Solution Approach 1:
The patent merges multiple individual MAC CE messages into a single unified MAC CE message that can activate TCI states for multiple serving cells simultaneously. This unified message structure maintains precise control over each individual TCI state activation while significantly reducing the total signaling overhead by eliminating the need for separate messages for each cell.
Solution Approach 2:
The patent creates a universal MAC CE message structure that serves multiple functions: it can activate TCI states for a single serving cell or multiple serving cells simultaneously. This multi-functional message structure maintains the precision of individual cell control while reducing signaling overhead by providing a unified activation mechanism that works across different scenarios.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method may include: receiving, from a base station via MAC CE, information associated with activation of one or more TCI states, wherein the information associated with the activation of one or more TCI states indicates a first serving cell ID, a CORESET index, and one or more TCI state IDs; and in case that the first serving cell ID is included in a list of a plurality of serving cells that are configured to be simultaneously updated for a TCI relation with the MAC CE, activating the one or more TCI state IDs for the CORESET index of each of the first serving cell ID and at least one second serving cell ID included in the list.