Wireless Device Output Power Adjustment for Network Criticality
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Solution Overview
Problem
Wireless devices with higher output power classes face limitations in operating effectively in cellular networks due to fixed maximum output power settings, leading to suboptimal performance and mobility issues between public safety and mobile communication networks, while also experiencing power back-off due to RF components, which affects coverage and performance.
Innovation Solution
A method and device that adjust the maximum output power level based on the current level of criticality in the network, allowing for higher power usage in critical situations and optimizing power settings to meet specific network requirements, thereby enhancing user experience and system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the maximum output power level is increased to improve coverage and connectivity, then the coverage area and signal strength are improved, but the out of band emissions and interference to surrounding systems increase
Solution Approach 1:
The patent implements dynamic adjustment of the maximum output power level based on real-time detection of operating conditions and criticality levels. The wireless device transitions from a static power setting to a dynamic one, where the power level is continuously adapted according to network criticality indicators received from the network node, thereby optimizing coverage while minimizing harmful emissions under different operating conditions.
Solution Approach 2:
The patent changes the power level parameter based on detected criticality conditions. When the network node detects a critical situation (such as public safety operations or emergency scenarios), it signals the wireless device to increase its maximum output power level from a first power level to a second, higher power level. This parameter change allows the system to overcome coverage limitations during critical events while maintaining normal emission levels during standard operations.
2Object-generated harmful factors
If the maximum output power level is fixed to meet regulatory emission requirements, then out of band emissions are controlled, but the performance and mobility between public safety and cellular networks deteriorate
Solution Approach 1:
The patent introduces dynamic power level adjustment that allows the wireless device to adapt between different network types. The device can switch between a first maximum output power level for public safety networks and a second, lower power level for commercial cellular networks, based on which network type it is currently operating in. This dynamic adaptation resolves the contradiction by making the power level flexible rather than fixed.
Solution Approach 2:
The patent implements parameter changes in the maximum output power level based on the detected network type and criticality level. The wireless device receives indications from the network node about the current criticality level and adjusts its power parameter accordingly, enabling it to meet regulatory requirements in commercial networks while maintaining enhanced performance capabilities in public safety networks during critical situations.
3Object-generated harmful factors
If power back-off is applied due to RF components to reduce out of band emissions, then emission requirements are met, but the coverage and transmission performance are reduced
Solution Approach 1:
The patent implements dynamic power adjustment that compensates for the coverage loss caused by power back-off. During normal operations, the device operates at a reduced power level to meet emission requirements. However, when criticality conditions are detected, the device dynamically increases its power level above the back-off limit, thereby recovering coverage while still maintaining emission compliance during non-critical periods.
Solution Approach 2:
The patent prepares for potential coverage loss by having the capability to increase power levels above normal operating levels. The wireless device is pre-configured with multiple power levels and the ability to switch between them based on detected conditions. This beforehand preparation allows the system to compensate for coverage reduction when critical situations arise, effectively cushioning against the negative impact of power back-off.
Data Source
Figure 1a~1b
Figure 2
Figure 3a~3b
AI summary
The present invention relates to a method implemented by a wireless device in a wireless communication system, for adjusting a maximum output power level of the wireless device. The method comprises obtaining (310) an indication indicating a current level of criticality in the system in which a network node serving the wireless device is operating, and adjusting (320) the maximum output power level based on the current level of criticality indicated by the obtained indication.