Here I write short notes on how to test open loop and close loop testing in lte and what idea behind it. In open loop no any data send back and in closed loop all relevant data available to both side lets check in some detail.
Open and close loop testing in LTE:
Open loop test where no test receiver sends feedback information source is sufficient to prove the fundamental characteristics of the individual components in the receiver and is also a first step in validating algorithms baseband demodulation section. However, complete verification.
Overall performance testing in real conditions receiver require closed loop through a channel off. Closed-loop test packets lost packets are re transmitted using incremental redundancy based on real-time information from the receiving confirmation.
Modulation and coding used for transmission also based on real-time information from the receiver. This feedback can be optimized for sub bands overall bandwidth channel to enable frequency selective scheduling.
This is very basic funda behind Open loop and close loop testing in LTE for more details check my old article on open loop testing in lte and close loop testing in lte individual.
Open Loop and Closed Loop Testing in LTE
In LTE, open-loop and closed-loop testing are techniques used to assess the system’s performance under different conditions. These methods help verify that the network can maintain high-quality communication by testing its response to signal variations, interference, and other factors. Here’s a brief overview of both types of testing:
- Open Loop Testing:
- Open-loop testing evaluates the system without feedback adjustments from the receiver or transmitter.
- The network operates without real-time adjustments to the signal or channel conditions.
- This test is often used for baseline measurements, such as checking signal strength or basic coverage.
- Closed Loop Testing:
- Closed-loop testing involves real-time feedback from the receiver to the transmitter, allowing dynamic adjustments based on channel conditions.
- It is used for more accurate performance tests, including power control, interference management, and adaptive modulation schemes.
- Closed-loop testing ensures the system can respond to real-world conditions like mobility and varying signal quality.
In summary, open-loop testing helps assess basic system performance, while closed-loop testing provides insights into how well the network adapts to changing conditions for optimal service delivery.