DCI-Triggered SRS Transmission for Flexible CSI Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing SRS transmission due to limited UE transmission power, resource allocation, and collisions, leading to poor CSI measurements and reduced flexibility in scheduling.
Innovation Solution
Enhancing SRS transmission by using DCI via PDCCH to trigger SRS transmission with specific parameters, including cyclic shift, transmission power control, and spatial relation information, thereby improving flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS transmission is triggered using existing methods, then CSI measurements can be obtained, but transmission flexibility and scheduling efficiency are limited
Solution Approach 1:
The patent implements dynamic SRS transmission triggering through DCI formats that can be configured to trigger SRS transmissions adaptively based on current network conditions and scheduling requirements. The DCI configuration allows the system to dynamically adjust SRS transmission timing, frequency resources, and other parameters to optimize both flexibility and scheduling efficiency simultaneously.
Solution Approach 2:
The patent employs parameter changes by configuring multiple SRS transmission parameters through DCI, including cyclic shift values, transmission power control adjustments, frequency domain resources, and time domain resources. These parameter configurations enable the system to adapt SRS transmissions to different scheduling scenarios while maintaining efficient resource utilization.
2Measurement precision
If UE transmission power is increased to improve SRS transmission quality, then CSI measurement accuracy improves, but UE power consumption increases and resource allocation becomes less efficient
Solution Approach 1:
The patent implements transmission power control through DCI configurations that adjust SRS transmission power parameters dynamically. The network can configure power control parameters such as power offsets, maximum power limits, and power adjustment steps, enabling the UE to transmit SRS at optimal power levels that ensure sufficient measurement accuracy while minimizing unnecessary power consumption.
Solution Approach 2:
The patent applies partial action by triggering SRS transmissions selectively based on scheduling needs rather than continuous transmission. The DCI-based triggering mechanism allows the network to request SRS transmissions only when CSI measurements are currently needed, reducing overall UE power consumption while maintaining measurement accuracy when required.
3Measurement precision
If SRS transmission resources are allocated more frequently, then CSI measurement quality improves, but resource collision probability increases and system efficiency decreases
Solution Approach 1:
The patent implements preliminary action through RRC configuration of multiple SRS resource sets and parameter configurations before actual transmissions occur. The network pre-configures alternative SRS resources, frequency domain parameters, time domain parameters, and other settings that can be quickly activated via DCI triggering. This preparation allows the system to allocate SRS resources efficiently on-demand without frequent collisions, as resources are pre-organized and can be selectively activated based on current needs.
Data Source
AI summary
The present disclosure describes methods, systems and devices for enhancing sounding reference signal (SRS) transmission for a user equipment (UE). One method includes receiving, by the UE, downlink control information (DCI) via a physical downlink control channel (PDCCH) from a network base station, the DCI configured to trigger the SRS transmission according to at least one parameter of the SRS transmission. Another method includes sending, by a network base station to the UE, downlink control information (DCI) via a physical downlink control channel (PDCCH), the DCI configured to trigger the SRS transmission according to at least one parameter of the SRS transmission.