Power Headroom Reporting for Shared Amplifiers
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Solution Overview
Problem
In LTE-Advanced wireless communication systems, the network struggles to effectively control transmission power for multiple uplink component carriers due to shared power amplifiers, leading to potential over-allocation of resources and exceeding power headroom limitations.
Innovation Solution
A method where user equipment (UE) reports power headroom information for each uplink component carrier and power amplifier when triggered, allowing the network to allocate resources based on the power headroom of each component carrier without exceeding the shared power amplifier's limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE reports PH information for each uplink component carrier separately, then the network can allocate resources for each carrier independently, but the sum of allocated power resources may exceed the power headroom of the shared power amplifier
Solution Approach 1:
The patent merges the PH information reporting for multiple uplink component carriers into a unified power headroom report that reflects the total power consumption across all carriers sharing the same power amplifier. This allows the network to perform joint resource allocation that respects the overall power constraints of the shared PA, preventing the sum of individual carrier allocations from exceeding the amplifier's headroom.
2Productivity
If the network allocates power resources for each component carrier based on individual PH information, then resource allocation is optimized per carrier, but the total allocated power may exceed the power amplifier's power headroom
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports aggregated power headroom information that reflects the actual power consumption and available headroom of the shared power amplifier. The network uses this feedback to adjust resource allocation decisions, ensuring that the total allocated power across all component carriers does not exceed the power amplifier's capabilities, thus avoiding power over-allocation.
Data Source
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AI summary
A method of performing power headroom reporting, hereafter called PHR, for a communication device configured with a plurality of uplink component carriers or parallel PUCCH and PUSCH transmission in a wireless communication system is disclosed. The method comprises reporting power headroom information of at least one of the communication device, at least an uplink component carrier, and at least a power amplifier configured to the communication device, to a network of the wireless communication system when the PHR is triggered.