حيدر عبد الحسن ال كيم ( مدرس )
كلية الهندسة - الالكترون والاتصالات
[email protected]
Enhancement and Performance Analysis of VoIP Algorithms in Wireless Networks
بحث النوع:
هندسة التخصص العام:
Maghrib Abidalreda Maky Alrammahi اسم الناشر:
Haider Abdul Hassan Hadi Al Kim اسماء المساعدين:
International Journal of Computer Techniques الجهة الناشرة:
IJCT is a leading international journals for publication of new ideas, the state of the art research results and fundamental advances in all aspects of computer science and engineering. IJCT Journal will provide a quality readable and valuable addition to the knowledge. This will serve as resources for researchers along with to provide support to the scholars to enable them to undertake and disseminate their research and to help them for development of their own skills of reasoning and understanding. IJCT is a scholarly open access, peer reviewed international journal with a primary objective to provide the academic community and industry for the submission of half of original research and applications related to Computer Science and Engineering.  
2018 سنة النشر:


Voice over Internet Protocol (VoIP) is currently one of the fastest spreading telephone technologies. In recent years, VoIP has been widely used in wired and wireless networks because of its compatibility with and adoption in IEEE 802.11 devices. This technology works in the second layer of data link layer, and thus, is compatible with the carrier-sense multiple access with collision avoidance protocol (CSMA/CA), which works in IEEE 802.11 networks. The operation of this protocol depends on various algorithms, including the distributed coordination function (DCF) algorithm. This algorithm is governed by the transmission of packets at any time without considering the priorities of other stations. A collision of packets may occur when transmitting simultaneously with the rest of the stations. Another algorithm is the enhanced distributed channel access (EDCA), which sets a priority when sending packets between stations. Thus, if more than one station is transmitting simultaneously, then one of the stations will have higher priority and the remaining stations in the transmitter will have to wait depending on the order of priority. Consequently, collisions do not occur. In this regard, EDCA is better than DCF. The parameters of these algorithms are modified to produce a new algorithm, called M_EDCA. The three algorithms are applied using a simulation program, i.e. OPNET. The final results are obtained, and the results of the new algorithm are compared with those of the existing algorithms. The best results are achieved using the new algorithm, and consequently, the best voice quality in transmission and reception, and the best performance and service in VoIP applications.