Aperiodic CSI and SRS Transmissions for SCell Dormancy
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Solution Overview
Problem
Aperiodic Channel State Information (CSI) measurement and Sounding Reference Signal (SRS) transmissions on dormant Secondary Cells (SCells) in cellular communications systems increase UE power consumption, leading to latency in transition from dormant bandwidth parts to data scheduling, which existing solutions often preclude by not supporting these operations.
Innovation Solution
The method involves UE capability signaling to indicate support for A-CSI measurement and SRS transmission on dormant bandwidth parts, allowing flexible operation and preferred configuration settings to manage power consumption and latency, such as A-CSI triggering offsets, which complements the UE assistance framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If A-CSI measurement and SRS transmission are enabled on dormant SCells, then measurement precision and uplink channel estimation are improved, but UE power consumption increases
Solution Approach 1:
The patent implements dynamic configuration of A-CSI measurement and SRS transmission on dormant SCells through capability signaling and network configuration. The UE indicates its support for these operations via capability information, and the network configures triggering offsets and parameters based on actual needs, allowing the system to adapt between power-saving and performance-optimized modes
Solution Approach 2:
The patent changes key parameters including enabling/disabling A-CSI measurement on dormant SCells, configuring SRS transmission parameters, and adjusting triggering offsets. These parameter changes allow flexible control over when and how measurements are performed, balancing power consumption against measurement precision requirements
2Measurement precision
If A-CSI measurement and SRS transmission are enabled on dormant SCells, then channel state information quality is improved, but transition latency increases
Solution Approach 1:
The patent performs A-CSI measurements and SRS transmissions during the dormant state before data scheduling is activated. By conducting measurements in advance while the cell is dormant, the system prepares channel state information that can be quickly utilized when activation occurs, reducing the transition latency without sacrificing measurement quality
3Adaptability or versatility
If capability signaling for A-CSI and SRS on dormant BWP is added, then system flexibility and adaptability are improved, but device complexity increases
Solution Approach 1:
The patent extends existing capability signaling mechanisms to cover multiple functions including A-CSI measurement support, SRS transmission support, and dormant BWP operation. By designing the capability information structure to handle multiple related functions in a unified manner, the patent achieves high system flexibility while managing signaling complexity through efficient encoding and organization
Data Source
AI summary
Systems and methods are disclosed herein that relate to enabling Sounding Reference Signal (SRS) transmissions and Aperiodic Channel State Information (A-CSI) for Secondary Cell (SCell) dormancy. In one embodiment, a method performed by a wireless communication device comprises transmitting, to a network node, first capability information that indicates that the wireless communication device supports SCell dormancy operation using a dormant bandwidth part (BWP) for one or more SCells. The method further comprises transmitting, to the network node, second capability information that indicates whether the wireless communication device supports sounding reference signal, SRS, transmission on a dormant BWP of one or more SCells. In this manner, efficient and flexible operation of SCell dormancy is provided.