Direct SCell Activation via RRC-Configured TRS Bursts
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Solution Overview
Problem
Conventional methods for direct secondary cell (SCell) activation in wireless communication networks suffer from significant activation latency due to the use of MAC-CE and periodic SSB or TRS transmissions.
Innovation Solution
The method involves generating an RRC command by an access node to configure a UE to detect TRS transmission bursts, eliminating the need for MAC-CE and periodic transmissions, thereby reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MAC-CE is used for SCell activation, then the activation process can be initiated, but significant activation latency is incurred
Solution Approach 1:
The patent extracts and eliminates the MAC-CE signaling element from the SCell activation process. By removing this intermediate step, the patent achieves direct SCell activation through RRC signaling alone, thereby eliminating the latency associated with MAC-CE transmission and processing while maintaining the functionality of SCell activation.
Solution Approach 2:
The patent implements preliminary configuration of TRS transmission parameters directly within the RRC command before activation is needed. This allows the UE to be pre-configured with the necessary TRS transmission details, enabling immediate activation without waiting for subsequent periodic transmissions or additional signaling steps.
2Device complexity
If periodic SSB transmissions are used for direct activation, then MAC-CE can be eliminated, but latency up to 160 ms is incurred due to periodicity
Solution Approach 1:
The patent uses preliminary action by configuring the UE directly in the RRC command with the TRS transmission parameters and timing information. This allows the UE to immediately activate the SCell without waiting for periodic SSB transmissions, eliminating the 160 ms latency associated with periodic transmission schedules.
Solution Approach 2:
The patent extracts the periodic transmission requirement from the activation process by using aperiodic TRS transmissions triggered directly through RRC signaling. This removes the latency constraint imposed by periodic transmission schedules while maintaining a relatively simple signaling structure.
3Ease of operation
If MAC-CE is used to configure TRS transmissions, then direct activation can be achieved, but additional latency is introduced due to MAC-CE transmission delay
Solution Approach 1:
The patent extracts and removes the MAC-CE transmission step from the activation process. By implementing direct TRS configuration through RRC signaling alone, the patent eliminates the additional latency introduced by MAC-CE transmission, processing, and retransmission while maintaining direct activation capability.
Solution Approach 2:
The patent merges the TRS configuration and activation functions into a single RRC command, eliminating the need for separate MAC-CE signaling. This consolidation reduces the number of transmission steps and associated delays while achieving direct SCell activation.
Data Source
AI summary
Systems, apparatus, methods, and computer programs for fast, direct SCell activation are disclosed. In one aspect, a method can include receiving, by a UE, an RRC command that causes the UE to be configured to detect a TRS transmission of a plurality of TRS transmission bursts broadcast by an access node, disregarding, by the UE, one or more TRS transmission of the plurality of TRS transmission bursts that are received, by the UE, during processing of the received RRC command, and after processing, by the UE, of the received RRC command, decoding a TRS transmission of the plurality of TRS bursts that is received subsequent to completion of processing of the received RRC command for automatic gain control (AGC).