Channel State Prediction for High Latency Satellite Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high latency communication systems, such as satellite communications, receiver channel state information (CSI) becomes stale over time, compromising its utility and affecting the performance of both the transmitter and receiver.
Innovation Solution
A channel state prediction capability is implemented, which determines a measured channel quality and total round trip latency to predict the channel quality at a future time, allowing for optimized transmission parameters to be selected based on predicted channel state factors like path loss, shadow fading, and fast fading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If receiver channel state information is used for transmission optimization in high latency communication systems, then transmission performance can be improved, but the channel state information becomes stale over time due to high latency, compromising its utility
Solution Approach 1:
The patent applies preliminary action by predicting future channel state information before actual transmission occurs. The system uses measured channel quality and total round trip latency to determine predicted channel quality, allowing the transmitter to prepare optimized transmission parameters in advance based on anticipated channel conditions rather than relying on stale historical data
Solution Approach 2:
The patent implements feedback by using measured channel quality information from the receiver and combining it with known latency parameters to generate predicted channel state information. This creates a closed-loop system where past measurements inform future predictions, allowing the system to adapt to changing channel conditions despite high latency
2Loss of information
If channel state information is updated frequently to maintain accuracy, then channel state freshness is improved, but the latency and time delay in high latency systems prevent timely updates
Solution Approach 1:
The system performs preliminary prediction of channel state information using the relationship between measured channel quality and total round trip latency. By calculating predicted channel quality in advance based on historical measurements and latency characteristics, the system eliminates the need for frequent real-time updates that would be constrained by high latency
Solution Approach 2:
The system uses its own measured channel quality data and known latency parameters to self-generate predicted channel state information without requiring external real-time updates. The transmitter independently determines predicted channel quality by combining its measurements with latency information, making the system self-sufficient despite communication delays
Data Source
AI summary
The present disclosure generally discloses a channel state prediction capability. In a communication system including a transmitter and a receiver communicating via a communication channel, the channel state prediction capability may enable the transmitter to transmit to the receiver via the communication channel based on a predicted channel state of the communication channel. The predicted channel state may be a prediction of the channel state at a future time at which data transmitted by the transmitter is expected to be received by the receiver, which may be based on a total round trip latency of the communication channel. The predicted channel state may include one or more parameters (e.g., a predicted channel quality indicator, a predicted rank indicator, or the like). The predicted channel state may be predicted based on predictions of channel state factors which may impact the channel state of the communication channel (e.g., path loss, shadow fading, fast fading, or the like).