ElTaweel, H., ElZonfoly, R., ElMoghazy, A., ElMekaty, H. (1999). IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS. test, 2(2nd International Conference on Electrical Engineering ICEENG 1999), 44-51. doi: 10.21608/iceeng.1999.62274
Hamdy ElTaweel; Refat ElZonfoly; Ali ElMoghazy; Hamdy ElMekaty. "IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS". test, 2, 2nd International Conference on Electrical Engineering ICEENG 1999, 1999, 44-51. doi: 10.21608/iceeng.1999.62274
ElTaweel, H., ElZonfoly, R., ElMoghazy, A., ElMekaty, H. (1999). 'IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS', test, 2(2nd International Conference on Electrical Engineering ICEENG 1999), pp. 44-51. doi: 10.21608/iceeng.1999.62274
ElTaweel, H., ElZonfoly, R., ElMoghazy, A., ElMekaty, H. IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS. test, 1999; 2(2nd International Conference on Electrical Engineering ICEENG 1999): 44-51. doi: 10.21608/iceeng.1999.62274

IMPROVEMENTS IN ERROR IMMUNITY OF SYNCHRONOUS DIGITAL HIERARCHY (SDH) POINTERS

The International Conference on Electrical Engineering
Article 6, Volume 2, 2nd International Conference on Electrical Engineering ICEENG 1999, November 1999, Pages 44-51    PDF (1.74 M)
Document Type: Original Article
DOI: 10.21608/iceeng.1999.62274
Authors
Hamdy ElTaweel1; Refat ElZonfoly2; Ali ElMoghazy3; Hamdy ElMekaty4
1Eng. Hamdy ElTaweel, Egyptian Army.
2Ass. Prof. Dr. Refat ElZonfoly, Telecommunications National Institute, Cairo, Egypt.
3Ass. Prof. Dr. Ali ElMoghazy, Egyptian Army.
4Prof. Dr. Hamdy ElMekaty, Faculty of Engineering, ElMansoura University.
Abstract
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.
Keywords
SDH; SONET; Improvements; immunity; Pointers
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