D2D Cluster Power Control for Low-Interference Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In D2D communication, especially in out-of-network coverage scenarios, existing power control methods result in excessive power consumption and interference due to maximum power transmission, lacking effective power control mechanisms.
Innovation Solution
A power control method and wireless device design that adjusts data channel transmission power based on the power levels and positions of other devices in the cluster, using equations to determine optimal transmission powers for each device to ensure all devices in the cluster are reached without exceeding necessary limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maximum power transmission is used in D2D communication, then all wireless devices in the cluster can be reached, but power consumption increases and interference to non-targeted UEs increases
Solution Approach 1:
The patent changes the transmission power parameter from a fixed maximum value to a dynamically adjusted value. The transmitting UE determines its transmission power based on the received power control information (Pc) from the receiving UE, allowing the power level to adapt to actual channel conditions and distance, thereby reducing unnecessary power consumption while maintaining reliable communication
Solution Approach 2:
The patent implements a feedback mechanism where the receiving UE measures the channel quality and sends power control information (Pc) back to the transmitting UE. This feedback loop enables the transmitting UE to adjust its transmission power based on real-time channel conditions, ensuring reliable delivery while optimizing power usage
2Reliability
If maximum power transmission is used in D2D communication, then all wireless devices in the cluster can be reached, but interference to non-targeted UEs increases
Solution Approach 1:
The patent adjusts the transmission power parameter dynamically based on the received power control information, changing it from a fixed maximum value to an optimized value. This reduces the transmission power to the minimum necessary level, thereby maintaining reliable communication coverage while minimizing harmful interference to non-targeted UEs in the vicinity
Solution Approach 2:
The patent applies local quality optimization by tailoring the transmission power specifically to the needs of the intended receiving UE based on channel conditions and distance. Each transmitting UE adjusts its power locally according to the specific receiving UE's requirements, rather than using a uniform maximum power level, thus reducing interference to other UEs while maintaining reliable communication with the target
3Use of energy by moving object
If power control information is exchanged between wireless devices, then transmission power can be optimized, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements self-service power control where each wireless device autonomously determines its own transmission power based on received power control information. The transmitting UE independently calculates the appropriate power level using the formula P = min(Pmax, Pc + PathLoss), without requiring complex centralized control, thus optimizing power consumption while keeping the mechanism relatively simple
Solution Approach 2:
The patent segments the power control function into independent components: the receiving UE measures channel quality and determines power control information, while the transmitting UE independently calculates and applies the transmission power. This segmentation allows each device to handle power control locally without requiring complex centralized coordination, reducing overall system complexity
Data Source
AI summary
The present disclosure provides a power control method and a wireless device, in a cluster comprised of wireless devices including a first wireless device and a second wireless device, comprising: receiving power control information including a second data channel transmission power, from the second wireless device; determining a first data channel transmission power based on the second data channel transmission power; and controlling data channel transmission power of the first wireless device according to the first data channel transmission power; wherein, the first data channel transmission power is a power allowing the first wireless device to reach all wireless devices in the cluster, and the second data channel transmission power is a power allowing the second wireless device to reach all wireless devices in the cluster.