IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS
Hamdy ElTaweel, Refat ElZonfoly, Ali ElMoghazy, Hamdy ElMekaty · The International Conference on Electrical Engineering/The International Conference on Electrical Engineering · 1999
In this paper, a modified way to improve the immunity of the SDH pointers against communication errors is proposed. The compatibility between the current systems and those utilizing the proposed way is considered. A simulation program for a communication channel utilizing the SDH technique is developed. The simulation results for both the International Telecommunication Union Tele-communication standardization section (ITU-T) recommended way and the modified one are presented. The obtained result asserts that the proposed way is superior to the ITU-T recommended one. A mathematical derivation for the improvement factor of the probability to interpret an erroneous pointer in the SDH network utilizing the ITU-T recommendations and that utilizing the proposed way is carried out in both the steady state and at the beginning of new data.