Uplink Power Control for Single Uplink Carrier Deployment
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Solution Overview
Problem
When the Single Uplink (SUL) band and New Radio (NR) normal band are deployed in different station sites, the path loss of the SUL band cannot be estimated through the downlink signal of the NR normal band, preventing the User Equipment (UE) from performing uplink power control.
Innovation Solution
The UE receives SUL carrier information from the NR normal base station, which indicates the deployment status of the SUL and NR normal bands, including whether a target band is co-located with the SUL band, and uses this information to obtain power control data to adjust its uplink transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the SUL band and NR normal band are deployed in different station sites, then the network coverage can be expanded, but the path loss of the SUL band cannot be estimated through the downlink signal of the NR normal band
Solution Approach 1:
The patent introduces a target band as an intermediary element that is deployed in co-station with the SUL band. This target band serves as a mediator to enable path loss estimation for the SUL band by providing a downlink signal that can be measured by the UE, even when the SUL and NR normal bands are at different station sites.
Solution Approach 2:
The target band performs multiple functions: it provides downlink signal for path loss estimation of the SUL band, and its spectrum characteristics (being close to or overlapping with SUL band spectrum) enable it to serve as a universal reference for power control across different deployment scenarios.
2Area of stationary object
If the SUL band is used to compensate for insufficient uplink coverage, then uplink coverage is improved, but the UE cannot perform uplink power control when SUL and NR normal bands are at different sites
Solution Approach 1:
The target band acts as an intermediary that enables the UE to perform uplink power control for the SUL band by providing a measurable downlink signal. The UE measures the downlink signal of the target band and uses this measurement to calculate path loss, which is then applied to determine uplink transmission power for the SUL band.
Solution Approach 2:
The patent creates a functional copy of the path loss estimation mechanism by using the target band's downlink signal in place of the SUL band's downlink signal (which doesn't exist). This copying approach allows the UE to replicate the path loss measurement process that would normally be done directly on the SUL band.
3Adaptability or versatility
If the SUL band operates independently without co-station with NR normal band, then deployment flexibility is improved, but path loss estimation becomes impossible
Solution Approach 1:
The target band serves as a mediator that bridges the gap between independent SUL band operation and path loss estimation capability. By introducing this intermediary element that is co-located with SUL, the system maintains deployment flexibility while restoring the ability to estimate path loss through the target band's downlink signal.
Data Source
AI summary
A power control method and apparatus, a computer device, and a storage medium are provided. A UE receives SUL carrier information sent by an NR normal base station. Power control information is obtained according to the SUL carrier information. An uplink transmission power of the UE is adjusted according to the power control information. The SUL carrier information is used to indicate that an SUL band and an NR normal band are deployed in different station sites and whether there is a target band deployed in a co-station with the SUL band. A spectrum interval between the target band and the SUL band is less than or equal to a preset threshold value. When the SUL band and the NR normal band are deployed in different station sites, the UE may determine the power control information through the SUL carrier information, thereby adjusting an uplink power control of the UE.