Uplink Antenna Panel Switching Using Multiple SRI Fields
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reliability of wireless communication is compromised when a wireless device switches from one antenna panel to another, as the SRI field of the configured uplink grant becomes invalid, leading to potential transmission failures, increased error rates, and power consumption.
Innovation Solution
Implementing enhanced uplink transmission procedures by configuring multiple SRI fields based on the activation status of antenna panels, determining the size of the SRI field based on the quantity of SRS resources, and using DCI to indicate the appropriate SRS resource set, thereby reducing misalignment and enhancing communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single SRI field is used in the configured uplink grant, then the device structure is simple, but the communication reliability deteriorates when antenna panel switching occurs
Solution Approach 1:
The patent divides the SRI field configuration into multiple separate SRI fields (first SRI field and second SRI field), each associated with different antenna panels. This segmentation allows the system to select the appropriate SRI field based on the active antenna panel, thereby maintaining communication reliability when antenna switching occurs without significantly increasing overall system complexity.
Solution Approach 2:
The patent implements dynamic selection of SRI fields based on antenna panel activation status. The wireless device and base station dynamically determine which SRI field to use based on which antenna panel is currently active, allowing the system to adapt to changing antenna configurations and maintain reliable communication throughout the antenna switching process.
2Measurement precision
If the SRI field size is determined based on the quantity of SRS resources in each antenna panel's resource set, then the configuration is precise for each panel, but the determination complexity increases when multiple panels are involved
Solution Approach 1:
The patent applies different SRI field size configurations to different antenna panels based on their specific SRS resource quantities. Each antenna panel's SRI field size is determined locally according to the number of SRS resources in that panel's associated resource set, allowing precise configuration for each panel while maintaining manageable overall complexity through localized determination.
Data Source
AI summary
An uplink grant may be configured for wireless communications between a wireless device and a base station. Sounding reference signal (SRS) resource sets may be associated with one or more respective antenna panels, of a plurality of antenna panels, of the wireless device. One of a plurality of SRS resource indicators (SRI) associated with the configured uplink grant may indicate an SRS resource of an SRS resource set for transmitting a transport block. Based on deactivation of an antenna panel associated with the SRS resource set, a second transport block may be transmitted based on a second SRI of the plurality of SRIs, thus ensuring continuous uplink transmission associated with the configured uplink grant without having to indicate via configuration parameters a new SRI field associated with the configured uplink grant.