Dual Uplink Transmit Chain Power Allocation for Thermal Control
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Solution Overview
Problem
Existing communication devices with multiple transmit chains face challenges in efficiently managing maximum power reduction (MPR) and additional maximum power reduction (A-MPR) during concurrent uplink transmissions, leading to high power consumption and thermal management issues, particularly when one transmit chain is less efficient due to external obstructions.
Innovation Solution
A communication device with multiple transmit chains dynamically allocates power by applying unequal MPR/A-MPR based on the efficiency levels and environmental obstructions of each chain, prioritizing more power to the more efficient chain and less power to the less efficient chain to reduce overall power consumption and thermal overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If equal MPR/A-MPR is applied to both transmit chains, then transmission simplicity is maintained, but overall power consumption increases and thermal management becomes difficult
Solution Approach 1:
The patent applies different MPR/A-MPR values to different transmit chains based on their individual efficiency levels. Specifically, when one transmit chain is blocked or less efficient, the system applies a first MPR/A-MPR value to that chain and a second, different MPR/A-MPR value to the other chain, optimizing power consumption locally for each chain rather than applying a uniform reduction globally.
2Ease of operation
If equal MPR/A-MPR is applied to both transmit chains, then operational simplicity is maintained, but thermal overload risk increases
Solution Approach 1:
The system dynamically adjusts MPR/A-MPR values per transmit chain based on real-time efficiency measurements. When a transmit chain is blocked or operating at lower efficiency, the system applies higher power reduction to that specific chain, thereby distributing thermal load more evenly and preventing thermal overload while maintaining operational simplicity through automated control.
3Reliability
If transmit power is increased to compensate for blocked antenna, then transmission quality is maintained, but power consumption and thermal load increase
Solution Approach 1:
The patent changes the power reduction parameters (MPR/A-MPR values) dynamically based on transmit chain efficiency. Instead of maintaining constant transmit power across all chains, the system adjusts the MPR/A-MPR parameters to reflect real-time conditions, applying less reduction to efficient chains and more reduction to blocked or inefficient chains, thereby optimizing the balance between transmission quality and power consumption.
4Reliability
If more transmit chains are activated for spatial diversity, then transmission reliability improves, but overall power consumption increases
Solution Approach 1:
The system dynamically evaluates the efficiency of each transmit chain and adjusts MPR/A-MPR values in real-time based on current operating conditions. This dynamic adaptation allows the system to maintain transmission reliability across multiple chains while optimizing power consumption by applying appropriate power reduction to each chain according to its actual performance and environmental conditions.
Data Source
AI summary
A communication device, method and computer program product optimized additional maximum power reduction (A-MPR) during cooperative concurrent uplink transmission. The communication device configures a communications subsystem to perform cooperative concurrent uplink transmissions mode(s). The communications subsystem has transmit chains that include a first transmit chain and a second transmit chain. In response to determining that the first transmit chain has a higher system efficiency level than the second transmit chain, the controller allocates a larger portion of transmit power to the first transmit chain and a smaller portion of the transmit power to the second transmit chain to reduce overall power consumption by the communications subsystem. In response to determining that the first and second transmit chains have an equal efficiency level, the controller allocates equal transmit power to the first and second transmit chains. The controller configures the communications subsystem to communicate an uplink using the allocated power.