Sounding Reference Signal Resource Segmentation for Eight-Port UEs
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in supporting a higher number of transmit chains, leading to failed or incomplete sounding reference signal (SRS) procedures, increased latency, and inefficient resource use due to limitations in SRS resource configuration for UEs with up to eight SRS ports.
Innovation Solution
A network entity configures multiple SRS resources in a set, with some resources supporting a subset of the total number of SRS ports and an indication mechanism to utilize these resources effectively for PUSCH transmission, allowing UEs to transmit using a subset or all SRS ports across multiple resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS resource configuration is limited to support fewer transmit chains, then device complexity is reduced, but the number of supported SRS ports is insufficient for UEs with up to eight SRS ports
Solution Approach 1:
The patent segments the SRS resource set into multiple individual SRS resources, where each resource can be independently configured to support a subset of the total SRS ports. This allows the system to handle up to eight SRS ports by dividing them across multiple manageable resources, resolving the contradiction between supporting more ports and maintaining configuration simplicity.
Solution Approach 2:
The patent introduces a new dimension of resource indication through DCI messages, which provide dynamic indicators specifying which SRS resources and how many ports to use for PUSCH transmission. This additional signaling dimension enables flexible port allocation without increasing the fundamental configuration complexity.
2Productivity
If multiple SRS resources are configured to support more ports, then throughput is improved, but resource configuration complexity increases
Solution Approach 1:
The patent creates a universal SRS resource set structure that can adaptively support different numbers of ports (up to eight) through standardized resource configurations. Each SRS resource in the set follows the same configuration template, allowing the system to scale throughput by simply activating more resources rather than designing complex unique configurations for each port scenario.
3Reliability
If SRS procedures are restricted due to configuration limitations, then device complexity is reduced, but latency increases due to failed or incomplete procedures
Solution Approach 1:
The patent performs preliminary configuration of multiple SRS resources with all necessary parameters before actual transmission occurs. The network entity pre-establishes the resource set and provides indication mechanisms in advance, ensuring that when PUSCH transmission is needed, the UE can immediately select appropriate pre-configured resources without procedural delays or failures.
4Productivity
If PUSCH transmission uses subset of SRS ports, then resource use efficiency is improved, but adaptability to different UE capabilities is reduced
Solution Approach 1:
The patent implements dynamic port allocation where the number of SRS ports used for PUSCH transmission is determined by real-time channel conditions and UE capabilities rather than being fixed. The network entity dynamically indicates through DCI messages how many ports to activate from the pre-configured resource set, enabling the system to optimize resource efficiency for each transmission while maintaining full adaptability to different UE capabilities up to eight ports.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment may receive signaling from a network entity configuring a sounding reference signal resource set comprising a first sounding reference signal resource associated with a first subset of a total number of sounding reference signal ports and a second sounding reference signal resource associated with a second subset of the total number of sounding reference signal ports supported by the UE. The UE may transmit sounding reference signals via at least one sounding reference signal resource of the plurality of sounding reference signal resources based on the signaling configuring a sounding reference signal resource set. The UE may receive a downlink control information message comprising an indication of a physical uplink shared channel transmission based on at least a subset of the total number of sounding reference signal ports. The UE may transmit the physical uplink shared channel transmission.