Uplink Radio Resource Allocation to Avoid High A-MPR Power Limits
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing uplink transmission power due to high Additional Maximum Power Reduction (A-MPR) values, leading to reduced data rates and increased resource consumption, particularly for UEs at the cell edge or communicating with satellites, where UEs struggle to establish and maintain connections.
Innovation Solution
Implementing a system that avoids allocating radio resources with high A-MPR values or within a predetermined threshold distance of the spectrum bandwidth edge, allowing UEs to communicate using power-restricted assignments and requesting a new allocation if necessary, thereby ensuring sufficient transmission power for effective connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If A-MPR is applied to reduce spurious emissions near band edges, then spectral compliance is improved, but transmission power is reduced leading to connection establishment failures
Solution Approach 1:
The base station performs preliminary evaluation of candidate radio resource allocations to determine if they would trigger high A-MPR values before actually allocating them to UEs. This prevents the power reduction issue before it occurs, allowing UEs to establish connections without experiencing transmission power limitations that would cause connection failures.
Solution Approach 2:
The patent extracts and removes radio resource allocations that are likely to trigger high A-MPR values from the pool of available resources. By identifying and excluding allocations near band edges that would cause spurious emission issues, the system prevents the trade-off between spectral compliance and connection reliability from occurring in the first place.
2Object-affected harmful factors
If A-MPR values are increased to ensure spectral compliance, then emission control is improved, but data rate decreases due to power constraints
Solution Approach 1:
The base station proactively identifies and excludes radio resource allocations that would trigger high A-MPR values before they are assigned to UEs. This preliminary filtering ensures that UEs receive allocations that maintain sufficient transmission power for high data rates without needing to apply aggressive power reduction.
Solution Approach 2:
The patent changes the selection criteria for radio resource allocations by introducing threshold-based filtering on A-MPR values and proximity to band edges. Instead of allowing any allocation and then applying A-MPR, the system modifies the allocation parameters themselves to exclude resources that would trigger high power reduction, thereby maintaining both spectral compliance and high data rates.
3Productivity
If radio resources near band edges are allocated, then spectrum utilization is improved, but connection reliability deteriorates due to power restrictions
Solution Approach 1:
The patent applies different quality standards to different regions of the spectrum. Radio resources near band edges are evaluated with stricter criteria (threshold A-MPR values and proximity thresholds) compared to resources in the center of the band. This local quality control ensures that only allocations maintaining sufficient transmission power are permitted, preserving connection reliability while still utilizing available spectrum.
Solution Approach 2:
The base station acts as an intermediary between the spectrum resource pool and UEs, filtering out allocations that would cause power restriction issues. By introducing this intermediate evaluation layer, the system maintains spectrum utilization while preventing allocations that would lead to connection maintenance problems due to A-MPR-triggered power reductions.
Data Source
AI summary
Embodiments of the present disclosure are directed to improving the management of user equipment (UE) uplink transmission power. If a candidate radio resource allocation meets a parameter of a standard-dictated high A-MPR or if it comprises resource blocks that are within a predetermined threshold distance of an allocated spectrum bandwidth edge, then that candidate radio resource allocation may not be assigned to the UE. Avoiding power-restricted radio allocations may be particularly effective for UEs at or near a cell edge, in challenging radio conditions, or when communicating with a satellite RAN—all of which typically require UEs to maximize their transmission power