Sounding Reference Signal Resource Mapping for Multi-Use Signaling
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Solution Overview
Problem
Conventional techniques for indicating sounding reference signal (SRS) resources are deficient in efficiently managing multiple use cases, leading to increased configuration overhead and resource utilization in wireless communications systems.
Innovation Solution
The described techniques support merged SRS resource sets that can be used for multiple SRS use cases such as antenna switching, codebook-based, and beam management, with configurations based on the specific number of ports and antennas for each use case, utilizing a mapping between SRS resource groups and bit sequences to optimize SRS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate SRS resource sets are configured for each use case (antenna switching, codebook-based, beam management), then each use case can be independently optimized, but configuration overhead and resource utilization increase
Solution Approach 1:
The patent merges multiple separate SRS resource sets into a single unified SRS resource set that contains SRS resources for different use cases (antenna switching, codebook-based, beam management). This is achieved by configuring a single resource set with multiple SRS resources, each associated with different use case indicators, thereby reducing configuration overhead while maintaining independent optimization capabilities for each use case through resource grouping and indication mechanisms.
2Adaptability or versatility
If multiple SRS resource sets are configured for different use cases, then each use case can be independently managed, but the number of resources and configuration complexity increase
Solution Approach 1:
The patent implements a universal SRS resource set that serves multiple use cases simultaneously. Each SRS resource within the unified set is associated with use case indicators that enable the base station to identify and manage different use cases (antenna switching, codebook-based, beam management) within a single resource set. This multi-functional approach allows one resource set to replace multiple separate sets while maintaining the ability to independently manage each use case through indication fields in control information.
3Ease of operation
If conventional SRS resource indication techniques are used, then simple indication is possible, but efficiency in managing multiple use cases deteriorates
Solution Approach 1:
The patent applies local quality by associating specific indicators or tags with individual SRS resources within the unified resource set. Each SRS resource is marked with use case indicators that provide localized identification information. This allows the base station to efficiently manage multiple use cases by examining the local indicators of specific resources rather than processing the entire resource set uniformly, thereby maintaining indication simplicity while significantly improving resource management efficiency through targeted processing.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability message indicating a first number of one or more transmit antennas supported by the UE for antenna switching and a second number of ports supported for uplink transmission that exceeds the first number of one or more transmit antennas. The UE may receive, based on the capability message, a sounding reference signal (SRS) configuration indicating a mapping between each SRS resource or SRS resource group and a respective bit sequence of a set of bit sequences. The UE may receive a control message comprising one or more bit sequences of the set of bit sequences indicating one or more SRS resources or an SRS resource group based on the mapping. The UE may transmit one or more SRS signals based on the control message.