Dynamic A-MPR Selection Based on Resource Block Distribution
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Solution Overview
Problem
Wireless communication devices apply excessive power reduction to meet additional spectrum emission requirements, leading to reduced uplink link budget and increased instances of call drops and service losses, as they rely on worst-case scenarios rather than actual transmission conditions.
Innovation Solution
A wireless communication device dynamically selects an Additional Maximum Power Reduction (A-MPR) value based on the distribution characteristics of allocated Resource Blocks (RBs) in addition to the RB allocation ratio, allowing for a more tailored power adjustment that accounts for actual transmission scenarios and reduces unnecessary power backoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a wireless communication device applies a fixed A-MPR back off value based on worst-case scenario to satisfy additional spectrum emission requirements, then spectrum emission requirements are met, but uplink link budget is reduced and effective coverage area is diminished
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed A-MPR back off value to a dynamic selection mechanism that adapts to actual transmission conditions. The device now selects A-MPR values based on real-time RB allocation patterns and distribution characteristics rather than applying a static worst-case value, allowing the system to optimize between spectrum compliance and link budget preservation according to actual operating conditions
Solution Approach 2:
The invention changes the parameter selection approach by introducing multiple A-MPR back off values corresponding to different RB allocation scenarios. Instead of using a single fixed parameter value, the system now selects from multiple parameter values based on the actual RB allocation ratio and distribution pattern, thereby adjusting the power reduction parameter to match actual transmission conditions rather than worst-case assumptions
2Object-affected harmful factors
If a wireless communication device applies excessive power reduction to satisfy additional spectrum emission requirements, then spectrum emission requirements are met, but uplink transmission power is reduced leading to call drops and service losses
Solution Approach 1:
The system dynamically adjusts the A-MPR back off value based on actual RB allocation patterns rather than applying excessive fixed power reduction. By monitoring real-time allocation conditions and selecting appropriate back off values from multiple options, the system maintains spectrum compliance while avoiding unnecessary power reduction that would cause call drops and service interruptions
Solution Approach 2:
The patent applies partial action by using only the necessary amount of power reduction required for actual transmission conditions rather than applying excessive reduction based on worst-case scenarios. The system selects A-MPR values that are sufficient for the actual RB allocation pattern without over-reducing power, thereby maintaining reliable uplink transmission while still meeting spectrum emission requirements
3Device complexity
If a wireless communication device considers only RB allocation ratio when selecting A-MPR value, then selection process is simple, but it assumes worst-case scenario resulting in higher than necessary power back off
Solution Approach 1:
The invention extends the parameter selection criteria from considering only RB allocation ratio to including RB distribution characteristics as well. By incorporating additional parameters such as the position and spread of allocated RBs within the bandwidth, the system achieves more accurate A-MPR value selection that reflects actual transmission conditions, reducing unnecessary power back off while maintaining spectrum compliance
Data Source
AI summary
A method for dynamically selecting an A-MPR value to apply for an uplink transmission is provided. The method can include a wireless communication device receiving an indication from a network that A-MPR should be applied for uplink transmissions within a frequency band used for communication between the wireless communication device and the network. The method can further include the wireless communication device receiving an RB allocation for a subset of RB's within the frequency band from the network. The method can additionally include the wireless communication device determining an allocation ratio and a distribution characteristic of the allocated subset of RB's within the frequency band. The method can also include the wireless communication device selecting an A-MPR value to apply based at least in part on the allocation ratio and the distribution characteristic. The method can further include the wireless communication device applying the selected A-MPR.