Uplink Power Control for Virtual MIMO Systems
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Solution Overview
Problem
Conventional power control methods for wireless communication systems are inadequate for virtual MIMO systems, leading to increased interference and resource wastage, as they do not effectively manage uplink power across multiple user equipment devices.
Innovation Solution
A method and device for controlling uplink power in virtual MIMO systems by determining and adjusting the power of paired user equipment devices based on orthogonality, approximating the channel matrix to an orthogonal matrix to minimize interference and optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional power control mode is employed in virtual MIMO system, then power control can be implemented for individual user equipment, but interference between user equipments increases and system resources are wasted
Solution Approach 1:
The patent merges the power control of multiple user equipments into a unified virtual MIMO system-level power control mechanism. By treating paired user equipments as a single virtual antenna system, the patent coordinates their transmission powers jointly, transforming individual power control into system-wide power control, thereby reducing inter-user interference while improving resource utilization.
Solution Approach 2:
The patent changes the power control parameter from individual user equipment transmission power to system-level power distribution ratios. By introducing power control parameters that define the relationship between paired user equipments' powers, the system optimizes the power distribution to achieve orthogonality and minimize interference, rather than controlling each user's power independently.
2Ease of operation
If traditional power control mode is employed in virtual MIMO system, then individual user power adjustment is possible, but data transmission quality is influenced
Solution Approach 1:
The patent combines the transmission signals of paired user equipments into a virtual MIMO system, where their combined signal quality is optimized through system-level power control. This merging approach ensures that the composite signal from multiple users maintains high quality by coordinating their power levels to achieve orthogonality and reduce mutual interference.
Solution Approach 2:
The patent implements feedback mechanisms where the network side measures the channel conditions and carrier-to-interference ratios of the virtual MIMO system, then adjusts the power control parameters accordingly. This closed-loop feedback ensures that the data transmission quality is continuously optimized by adapting the power distribution based on actual channel conditions and interference levels.
3Ease of operation
If traditional power control mode is employed in virtual MIMO system, then power control thresholds can be preset, but system resources are wasted
Solution Approach 1:
The patent creates a universal power control mechanism that serves multiple user equipments simultaneously through the virtual MIMO framework. The system-level power control parameters apply to pairs of user equipments sharing the same time-frequency resources, making the power control mechanism multi-functional and efficient, thereby reducing resource waste compared to individual power control approaches.
Solution Approach 2:
The patent transforms the power control approach by changing from fixed individual power thresholds to dynamic system-level power distribution ratios. By optimizing the power relationship parameters between paired users based on channel conditions and orthogonality requirements, the system minimizes unnecessary power consumption and reduces resource waste while maintaining effective power control.
Data Source
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AI summary
A method for controlling uplink power is provided, which is used for implementing the uplink power control of the virtual multiple input multiple output system, so as to save the system resource. The method includes: determining at least two user equipments being paired in a virtual multiple input multiple output system; and in accordance with the orthogonality of the at least two user equipments, adjusting at least the power of one of the user equipments. In addition, a device for implementing the method is provided.