Wireless Path Loss Estimation for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications, existing systems face challenges in accurately estimating path loss between geographic zones, leading to inefficient use of spectrum resources and increased interference due to unknown signal attenuating effects, particularly in multicast or broadcast scenarios where transmitting at full power is necessary to ensure message receipt by intended receivers.
Innovation Solution
A method and apparatus for estimating path loss between geographic zones by receiving wireless devices, which receive signals from transmitting devices in other zones, determine configured transmit power information, and calculate path loss based on received power measurements, allowing for adjusted transmission power settings to reduce interference and enhance spatial reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices transmit at full or high power to ensure communication reaches target geographic region, then communication reliability is improved, but interference increases and spatial reuse is reduced
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmit power parameter based on estimated path loss. Instead of using fixed full power transmission, the system estimates path loss between geographic zones and configures transmit power accordingly, changing the power parameter from maximum to an optimized value that maintains reliability while reducing interference.
Solution Approach 2:
The patent implements feedback mechanisms where wireless devices measure received power, estimate path loss, and use this information to adjust future transmit power settings. The system continuously monitors communication conditions and feeds this information back to power configuration decisions, enabling adaptive power control that balances reliability and interference reduction.
2Reliability
If wireless devices transmit at full or high power to ensure message receipt, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The system changes the transmit power parameter from fixed maximum power to dynamically adjusted power levels based on path loss estimation. By calculating the minimum necessary power to achieve reliable communication across the estimated path loss, the system reduces unnecessary power consumption while maintaining message receipt reliability.
3Device complexity
If path loss estimation is not performed, then device complexity is reduced, but transmission efficiency decreases due to unknown signal attenuating effects
Solution Approach 1:
The patent enables wireless devices to perform self-service path loss estimation using their own receive and transmit power capabilities. Each device independently measures received power, calculates path loss based on known transmit power and measured received power, and uses this self-generated information to optimize its transmissions, eliminating the need for complex external path loss measurement infrastructure.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
Methods, systems, and devices for wireless communications are described. Examples may include a receiving wireless device located in a first geographic zone receiving multiple signals from one or more transmitting wireless devices. The receiving wireless device may determine based on the received signals that the one or more transmitting devices are located in a second geographic zone. The receiving wireless device may determine configured transmit power information for each of the signals received from the transmitting wireless devices located in the second geographic zone. The receiving wireless device may estimate a path loss of wireless communications between the first geographic zone and the second geographic zone based on the configured transmit powers received in the signals. The receiving wireless device may communicate within the second geographic location based on the estimated path loss between the first geographic region and the second geographic region.