Adaptive SRS Port Configuration for Wireless Signaling Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing sounding reference signals (SRS) due to the need for all configured SRS ports to be used for transmission, which increases signaling overhead and resource consumption.
Innovation Solution
The method allows user equipment (UE) to determine and use a reduced number of SRS ports based on configuration, enabling adaptive SRS port configuration, which reduces signaling overhead and allows repurposing of unused SRS ports for other transmissions, thereby improving network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all configured SRS ports are used for transmission, then channel state feedback coverage is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent applies partial action by allowing the UE to transmit SRS using only a subset of configured SRS ports rather than all ports. The UE determines an actual number of SRS ports to use, which can be less than the maximum configured ports, thereby reducing signaling overhead while maintaining adequate channel state feedback through the actively used ports.
Solution Approach 2:
The patent implements dynamic adaptability by enabling the UE to flexibly adjust the actual number of SRS ports used for transmission based on current system conditions, UE capabilities, and configuration parameters. This dynamic adjustment allows optimization between feedback coverage and resource consumption rather than using a fixed all-ports approach.
2Measurement precision
If all configured SRS ports are used for transmission, then channel state feedback quality is improved, but resource consumption increases
Solution Approach 1:
The patent applies partial action by transmitting SRS on only the necessary number of ports rather than all configured ports. The UE determines an actual number of SRS ports to use for transmission, which can be less than the maximum configured ports, thereby reducing resource consumption while maintaining adequate channel state feedback quality through the actively used ports.
3Quantity of substance
If UE determines actual number of SRS ports different from maximum, then signaling overhead is reduced, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine the actual number of SRS ports to use for transmission based on configuration parameters and system conditions. The UE independently makes this determination without requiring complex base station control or coordination, thereby reducing signaling overhead while the added determination logic resides in the UE rather than increasing overall system complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a sounding reference signal (SRS) configuration that indicates a maximum number of SRS ports and whether the UE is permitted to determine an actual number of SRS ports to be used for SRS transmission that is different from the maximum number of SRS ports. The UE may determine the actual number of SRS ports to be used for SRS transmission based at least in part on the SRS configuration. The UE may transmit one or more SRSs using the actual number of SRS ports. Numerous other aspects are provided.