Group-Specific SRS Resource Indications for Uplink Beam Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink beams for multiple panels, leading to high DCI overhead, limited simultaneous transmission capabilities, and inefficient beam refinement, especially in scenarios involving UE mobility and multi-beam operations.
Innovation Solution
The implementation of group-specific resource indications and configurations for sounding reference signals (SRS) allows for efficient UL beam management by associating SRS resources with UE panels, enabling simultaneous transmission of multiple beams and reducing DCI overhead through quasi-co-spatial relations and flexible beam indication mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional uplink beam management methods are used, then system simplicity is maintained, but DCI overhead increases and simultaneous transmission capabilities are limited
Solution Approach 1:
The patent segments uplink beam management by introducing group-specific resource indications that divide SRS resources into multiple groups, each associated with different UE panels. This segmentation enables independent indication and simultaneous transmission of multiple beams across different groups, thereby increasing productivity while managing DCI overhead through structured organization of beam resources.
Solution Approach 2:
The patent introduces a new dimension of group-specific resource indication alongside traditional beam indication. By adding this dimensional layer of organization where SRS resources are grouped and associated with specific UE panels, the system can indicate multiple beams simultaneously without proportionally increasing DCI overhead, as the group structure provides an additional organizational dimension for efficient resource management.
2Productivity
If group-specific resource indications are implemented, then UL beam management efficiency improves, but system complexity increases
Solution Approach 1:
The group-specific resource indication mechanism serves multiple functions simultaneously: it enables UL beam management efficiency by allowing group-based SRS resource indication, supports multi-beam operations across different UE panels, and provides a structured framework for beam refinement. This multi-functionality improves productivity without requiring separate mechanisms for each function, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent implements preliminary action by pre-configuring SRS resources into groups and establishing associations between groups and UE panels before actual transmission. This preliminary organization of resources into manageable groups with defined relationships reduces the complexity of real-time beam management, as the system only needs to indicate which pre-configured groups to use rather than managing individual beam parameters dynamically.
3Measurement precision
If multiple beams are transmitted simultaneously, then beam refinement capability improves, but signaling overhead increases
Solution Approach 1:
The patent merges multiple beam indications into a unified group-specific resource indication framework. By combining multiple SRS resources into groups and associating them with UE panels, the system can indicate multiple beams simultaneously through a consolidated signaling mechanism rather than separate indications for each beam, thereby improving measurement precision for beam refinement while limiting the increase in signaling overhead through the merging of indication processes.
Data Source
AI summary
Methods, systems, and devices for group-specific resource indications in mobile communication systems are described. An exemplary method for wireless communication includes determining, by a network node, an association among one set of one or more reference signals (RSs) and one or more groups, where each of the one or more RSs is associated with a usage or a time-domain behavior, and transmitting, to the terminal, a signaling message comprising the association. Another exemplary method for wireless communication includes determining, by the network node, a reference signal (RS) configuration, wherein the RS configuration comprises an association between one or more target RSs and a spatial granularity, and transmitting, to a terminal, a message comprising the RS configuration.