Fast SCell Activation via Reference Signal Triggering
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in secondary cell activation processes, particularly in triggering and signaling mechanisms, which hinder rapid and reliable activation of secondary cells in mobile communications systems.
Innovation Solution
The enhancement of signaling processes for secondary cell activation by utilizing reference signals, such as Triggering Reference Signals (TRS), CSI-RS, and SRS, integrated with MAC and DCI commands to facilitate faster and more efficient activation, independent of bandwidth part activation states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional SCell activation processes are used, then the activation process is simpler, but the activation latency is longer and efficiency is lower
Solution Approach 1:
The patent applies preliminary action by pre-configuring reference signals (TRS, CSI-RS, SRS) and activation conditions before SCell activation is needed. The UE prepares measurement configurations, reference signal resources, and activation criteria in advance, so that when activation is triggered, the process can proceed immediately without setup delays, thus reducing activation latency while improving efficiency
Solution Approach 2:
The patent introduces reference signals (TRS, CSI-RS, SRS) as intermediaries to facilitate SCell activation. These reference signals serve as mediators between the network configuration and the activation decision, enabling faster and more accurate channel quality assessment, which accelerates the activation process and improves overall efficiency without complicating the core activation mechanism
2Speed
If reference signal triggering mechanisms are added to SCell activation, then activation speed and efficiency improve, but signaling complexity increases
Solution Approach 1:
The patent applies universality by designing reference signal resources that serve multiple functions: they are used for channel quality measurement, activation triggering, and performance monitoring. This multi-functionality allows the system to improve activation speed without adding separate dedicated signaling mechanisms, as the same reference signals fulfill multiple roles, thereby limiting the increase in signaling complexity
3Reliability
If multiple reference signals (TRS, CSI-RS, SRS) are integrated for SCell activation, then activation reliability improves, but the signaling and processing overhead increases
Solution Approach 1:
The patent merges multiple reference signal types (TRS, CSI-RS, SRS) into a unified activation framework where they work together synergistically. Instead of treating them as separate independent mechanisms, the patent combines their functions into a coordinated activation process, which improves reliability through multiple measurement opportunities while reducing total signaling overhead by sharing configuration and triggering mechanisms across all reference signal types
Data Source
AI summary
A base station may receive, from a wireless device, a capability message comprising one or more capability Information Elements indicating that the wireless device supports fast SCell activation. The base station may transmit a command indicating activation of a first SCell and activation of a reference signal for fast activation of the first SCell.