Dynamic SRS Parameter Configuration for Uplink Beam Refinement
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Solution Overview
Problem
Current wireless communication systems face limitations in beam management due to semi-static SRS parameter configurations, which can lead to inflexible beam refinement procedures and inefficient use of network resources, particularly when the bandwidth of SRS transmissions does not align with the bandwidth of upcoming UL or DL transmissions.
Innovation Solution
Dynamic configuration of SRS parameters based on the parameters of triggering DL or UL transmissions, allowing for flexible adjustment of SRS bandwidth, timing, and QCL relationships to align with the specific requirements of upcoming communications, thereby enhancing beam refinement and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static SRS parameter configurations are used, then beam management procedures are simplified, but flexibility and resource efficiency deteriorate
Solution Approach 1:
The patent applies dynamics by transitioning from semi-static SRS parameter configurations to dynamic configurations where SRS bandwidth, timing, and QCL relationships are adjusted based on upcoming UL/DL transmission requirements. This allows the beam management procedure to adapt flexibly to changing communication needs while maintaining manageable complexity through automated parameter adjustment.
Solution Approach 2:
The patent implements parameter changes by modifying SRS transmission parameters (bandwidth, timing, QCL relationships) dynamically based on the characteristics of upcoming communications. This enables optimal beam refinement for each specific transmission scenario rather than using fixed configurations, thereby improving adaptability without significantly increasing procedural complexity.
2Device complexity
If SRS bandwidth is fixed, then configuration is simplified, but alignment with upcoming transmission bandwidth deteriorates
Solution Approach 1:
The patent applies dynamics by making SRS bandwidth a variable parameter that adapts to the bandwidth requirements of upcoming UL or DL transmissions. This dynamic adjustment ensures precise bandwidth alignment between SRS measurements and actual transmission characteristics, eliminating the mismatch problem inherent in fixed bandwidth configurations.
Solution Approach 2:
The patent implements parameter changes by adjusting the SRS bandwidth parameter based on the specific transmission scenario. This allows the SRS to be configured with the appropriate bandwidth to match upcoming transmissions, ensuring accurate channel sounding and beam refinement for the intended communication bandwidth.
3Device complexity
If semi-static SRS timing is used, then procedure simplicity is maintained, but timing alignment with upcoming transmissions deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from semi-static SRS timing to dynamic timing that is adjusted based on upcoming transmission schedules. This ensures optimal timing alignment between SRS measurements and subsequent UL/DL transmissions, reducing timing misalignment losses while maintaining manageable configuration complexity through automated timing adjustment.
Solution Approach 2:
The patent implements preliminary action by configuring SRS timing in advance based on knowledge of upcoming transmission schedules. This allows the SRS to be transmitted at the optimal time before the actual communication begins, enabling the system to prepare beam refinement measurements ahead of time rather than reacting after misalignment occurs.
Data Source
AI summary
Wireless communications systems and methods related to dynamically configuring sounding reference signal (SRS) resources are provided. In some aspects, a base station may measure a SRS transmission transmitted by a user equipment (UE) and receive, using a receive beam selected based on the measuring, a transmission from the UE. In some aspects, a UE may transmit a SRS transmission; and receive, from the BS, a downlink control information (DCI) message including a SRS resource indicator (SRI) for use by the UE in selecting a beam to transmit to the BS. The SRS transmission may be transmitted using a SRS resource and may have a SRS parameter that is indicated in or related to a triggering message, or related to a transmission parameter of a communication between the BS and the UE.