Group Common Downlink Control for Partial-Frequency SRS Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G New Radio (NR), efficient configuration of sounding reference signal (SRS) resources for multiple UEs in beam-based communication scenarios is challenging, especially when UEs are multiplexed using the same frequency resources, leading to interference and inefficient resource utilization.
Innovation Solution
Implementing partial frequency sounding configurations using group common downlink control information (GC-DCI) to identify specific frequency resources for each UE, allowing UEs to transmit SRS in designated resources while refraining from others, thereby optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs use the same frequency resources for SRS transmission, then resource utilization is improved, but interference between UEs increases
Solution Approach 1:
The frequency resources are segmented into different sets, with each UE assigned a specific set of frequency resources for SRS transmission. This segmentation allows multiple UEs to transmit simultaneously without mutual interference while efficiently utilizing the available frequency spectrum.
Solution Approach 2:
Different frequency resources are allocated to different UEs based on their specific requirements and interference characteristics. Each UE receives tailored frequency allocation that optimizes its performance while minimizing interference with other UEs, implementing local optimization within the overall system.
2Measurement precision
If full frequency sounding is performed for all UEs, then measurement accuracy is improved, but system complexity and overhead increase
Solution Approach 1:
Instead of requiring all UEs to perform full frequency sounding across the entire bandwidth, the system enables partial frequency sounding where each UE is configured with a specific subset of frequency resources. This partial action approach maintains sufficient measurement accuracy for beam management while significantly reducing system complexity and configuration overhead.
3Reliability
If beamforming is used to compensate for high path loss, then communication reliability is improved, but the need for frequent beam management increases system overhead
Solution Approach 1:
The system performs beam management and SRS configuration in advance through preliminary actions. UEs are pre-configured with their frequency resources and beam parameters, allowing the system to leverage beamforming reliability without requiring frequent real-time beam management adjustments, thus reducing overhead.
Data Source
AI summary
Aspects of the disclosure relate to the use of enhanced downlink control information to communicate partial frequency sounding configuration to user equipment (UE). A UE may receive a partial frequency sounding configuration generated for the UE the downlink control information, transmit a sounding reference signal (SRS) in one or more resources configured for SRS transmission in a bandwidth used by the UE, the one or more resources being identified by the partial frequency sounding configuration, and refrain from transmitting in a portion of a set of resources configured for SRS transmission in the bandwidth used by the UE. A format for the enhanced downlink control information may be based on standards defined the downlink control information formats.