Clustered D2D Power Control for Coverage Without Max Transmission
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Solution Overview
Problem
In device-to-device (D2D) communication, especially in out-of-network coverage scenarios, there is no effective power control mechanism, leading to excessive power consumption and interference due to maximum power transmission, which affects both transmitting and non-targeted wireless devices.
Innovation Solution
A power control method where wireless devices in a cluster exchange power control information to determine optimal data channel transmission powers, allowing each device to reach all other devices in the cluster, thereby reducing power consumption and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maximum power transmission is used in D2D communication, then the transmitting device can reach all wireless devices in the cluster, but power consumption increases and interference to non-targeted devices occurs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission power level based on the receiving device's location and channel conditions. Instead of using fixed maximum power, the transmitting device modifies the power parameter to match the actual communication needs, ensuring reliable delivery while minimizing energy waste and interference to non-targeted devices.
2Reliability
If maximum power transmission is used in D2D communication, then the transmitting device can reach all wireless devices in the cluster, but interference to non-targeted wireless devices increases
Solution Approach 1:
The patent implements local quality by directing transmission power specifically toward the intended receiving device rather than uniformly in all directions. By localizing the energy transmission to the specific spatial location and direction of the target device, the system achieves reliable communication coverage while minimizing interference to non-targeted devices in other directions.
3Use of energy by moving object
If power control information is exchanged among wireless devices, then optimal transmission power can be determined, but device complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving device sends power control information back to the transmitting device based on measured signal quality and channel conditions. This feedback loop enables automatic optimization of transmission power without requiring complex centralized control, as each device autonomously adjusts its power based on real-time conditions reported by the other device.
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.