mTRP Cell Switch Command with Beam Indications
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Solution Overview
Problem
Current wireless mobility technologies face challenges in enabling multiple transmit and receive point (mTRP) operations immediately after a cell switch, resulting in delayed configuration and reduced transmission efficiency and reliability during fast cell switching processes.
Innovation Solution
The method involves configuring a user equipment (UE) with a target cell to enable mTRP operation immediately after a cell switch by receiving a bandwidth part configuration and channel state information resource configuration for group-based beam reporting, allowing the source distributed unit to select and share an appropriate mTRP configuration with the target distributed unit, and sending a cell switch command with bandwidth part and beam indications to the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional cell switch procedure is used, then the cell switch command is sent after basic configuration, but mTRP operation is delayed until separate configuration is received
Solution Approach 1:
The source distributed unit sends the cell switch command with mTRP configuration information (bandwidth part identifier and multiple transmit and receive points beam indications) before the UE actually switches cells. This preliminary action ensures that the target cell's mTRP configuration is already in place, allowing the UE to immediately enter mTRP operation mode upon cell switch without waiting for separate configuration messages, thereby reducing handover interruption time and enabling faster cell switching.
2Productivity
If mTRP configuration is sent separately after cell switch, then configuration accuracy can be ensured, but transmission efficiency is reduced due to delayed configuration
Solution Approach 1:
The source distributed unit prepares and includes the complete mTRP configuration (bandwidth part identifier and multiple transmit and receive points beam indications) in the cell switch command before the UE switches cells. This preliminary configuration action ensures that the target cell's mTRP settings are established in advance, allowing immediate high-efficiency mTRP operation upon cell switch while maintaining configuration reliability through source unit verification before transmission.
Solution Approach 2:
The cell switch command acts as an intermediary message that carries both the cell switch instruction and the mTRP configuration information together. This intermediary approach allows the configuration to be transmitted reliably through the standardized cell switch command interface while still achieving the effect of preliminary configuration, thus maintaining configuration reliability while improving transmission efficiency.
Data Source
AI summary
In some embodiments, there is provided a method that includes receiving, by a source distributed unit, a configuration for a target distributed unit, wherein the configuration comprises at least one bandwidth part configuration for at least one transmit and receive point at the targeted distributed unit and a channel state information resource configuration of multiple transmit and receive points; in response to receiving a layer 1 measurement report for the target distributed unit, deciding, by the source distributed unit, to switch to the target distributed unit with a multiple transmit and receive points operation; and sending, by the source distributed unit, a cell switch command to a user equipment to change to the target distributed using a multiple transmit and receive points operation, the cell switch command including a bandwidth part identifier and multiple transmit and receive points beam indications. Related systems, methods, and articles of manufacture are also disclosed.