Pilot Signal Transmit Power Adaptation for Cellular Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pilot signal transmission in cellular networks faces a tradeoff between increased interference and inaccuracies in channel sensing due to varying transmit power levels.
Innovation Solution
Dynamic adaptation of pilot signal transmit power, including boosting to higher levels temporarily and occasionally, combined with orthogonal communication techniques like TDMA, CDMA, and FDMA to mitigate interference and enhance channel sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pilot signal transmit power is increased, then channel sensing accuracy is improved, but interference to other devices increases
Solution Approach 1:
The patent applies dynamics by making the pilot signal transmit power adjustable rather than fixed. The network device can dynamically adapt the transmit power of pilot signals based on channel conditions, device locations, and interference levels, allowing the system to optimize between accuracy and interference in real-time
Solution Approach 2:
The patent changes the transmit power parameter of pilot signals from a static value to a variable that can be adapted based on network conditions. By adjusting this parameter, the system can improve channel sensing accuracy when needed while reducing interference in other scenarios
2Object-generated harmful factors
If pilot signal transmit power is decreased, then interference is reduced, but channel sensing accuracy deteriorates
Solution Approach 1:
The system dynamically adjusts pilot signal transmit power based on real-time network conditions, allowing it to reduce interference when channel conditions are good while maintaining sufficient power when sensing accuracy is critical
Solution Approach 2:
The transmit power parameter is made adaptable, enabling the system to decrease power to reduce interference while maintaining adequate sensing performance through intelligent parameter selection based on network state
3Reliability
If pilot signals are transmitted frequently, then time-dependencies of channel condition are captured, but resource consumption increases
Solution Approach 1:
The patent implements periodic transmission of pilot signals at configured intervals rather than continuous transmission. This periodic action allows the system to capture time-varying channel conditions while consuming energy only when pilot signals are transmitted, balancing reliability and energy efficiency
Solution Approach 2:
The transmission timing of pilot signals is made dynamic and configurable, allowing the network to adjust the frequency of pilot signal transmissions based on channel variability and quality requirements, optimizing the balance between capturing channel changes and energy consumption
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A first terminal (130-1) receives, on a radio link of a cellular network, at least one uplink pilot signal (901) transmitted by at least one second terminal (130-2). The first terminal (130-1) transmits, on the radio link and to an access node (112) of the cellular network, an uplink report message (902) indicative of at least one property of the received at least one uplink pilot signal (901).