Duplex-Aware Power Headroom Reporting Under Self-Interference Limits
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Solution Overview
Problem
Existing wireless communication systems lack efficient methods for determining power headroom reports (PHR) that account for full duplex (FD) and half-duplex (HD) operating modes, leading to suboptimal transmit power control and potential interference issues.
Innovation Solution
A UE calculates separate PHRs for HD and FD modes, considering self-interference constraints, and reports these PHRs to the network, allowing for more optimal power control and mode switching when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single PHR is reported without distinguishing between FD and HD modes, then the reporting mechanism remains simple, but transmit power control becomes suboptimal and interference issues arise
Solution Approach 1:
The patent segments the PHR reporting mechanism by introducing separate PHR fields for FD mode and HD mode. The UE now reports multiple PHR values corresponding to different duplexing modes, allowing the network to select the appropriate PHR based on the current operating mode. This segmentation resolves the contradiction by improving power control accuracy while maintaining a structured reporting framework.
Solution Approach 2:
The patent introduces dynamic mode indication mechanisms where the UE can indicate its current duplexing mode (FD or HD) along with the corresponding PHR. The network dynamically selects which PHR to use based on the indicated mode, enabling adaptive power control that responds to changing operational conditions while maintaining reporting efficiency.
2Adaptability or versatility
If separate PHRs are calculated for FD and HD modes, then transmit power management is enhanced, but the calculation and reporting complexity increases
Solution Approach 1:
The patent creates a universal PHR reporting framework that handles both FD and HD modes through a unified mechanism. The same PHR calculation logic and reporting structure are used for both modes, with the only difference being the mode indication. This multi-functionality approach enables adaptive operation across different duplexing modes while avoiding the need for entirely separate calculation mechanisms.
Solution Approach 2:
The patent introduces mode-specific parameters (such as mode indication bits or flags) that change based on the operating duplexing mode. These parameter changes allow the UE to adapt its PHR reporting content according to the current mode without fundamentally changing the underlying calculation framework, thereby enabling versatility while controlling complexity.
3Object-affected harmful factors
If PHR reporting does not account for self-interference constraints in FD mode, then reporting is simpler, but interference management deteriorates
Solution Approach 1:
The patent applies local quality by introducing mode-specific PHR calculations where the FD mode PHR incorporates self-interference constraints while the HD mode PHR uses conventional calculations. This localized adaptation ensures that interference management is enhanced specifically where needed (in FD mode) without unnecessarily complicating the HD mode reporting, thereby addressing interference issues while controlling overall complexity.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques for wireless communications. An example method generally includes calculating a first power headroom report (PHR) for a half duplex (HD) operating mode, calculating a second PHR for a full duplex (FD) operating mode during which maximum uplink transmit power is subject to one or more self-interference constraints, determining whether to report the first PHR, the second PHR, or both, and reporting at least one of the first PHR or the second PHR to a network entity, in accordance with the determination.