Various layer techniques to improve video transmission on 20 GHz radio link in a rainy environment

摘要

The transmission rate via radio increases to transmitting frequency increment.The higher frequency the higher transmission rate.Video traffics require radio with large bandwidth.This requirement may be fulfilled by the use of millimetre radio transmission on 20 GHz.However,radio signal on millimetre band decreases significantly in presence of rain mainly caused by link attenuation.This paper evaluates the performance of video transmission on 20 GHz in presence of rain on tropical environment.As various layers techniques are available,some techniques such as APA,Java Servlet Alias(JSPA),Digital Subtraction Angiography(DSA)and mac-application layer scheduling are implemented to help radio dealing with rain attenuation.The evaluation results through designed simulations proves that the video quality degrades significantly to rain.The combined technique is able to increase video quality,namely;physical technique up to 0.395 dB,MAC scheduler up to 6.5dB and upper layer technique achieves 1.17 dB.