Maryam SamanAzari - Department of Computer Engineering and Information Technology Azarbaijan Shahid Madani University Tabriz, Iran
AsgarAli Bouyer - Department of Computer Engineering and Information Technology Azarbaijan Shahid Madani University Tabriz, Iran
Naser Faraj Zadeh - Department of Computer Engineering and Information Technology Azarbaijan Shahid Madani University Tabriz, Iran

With the advent of cloud computing and the increasing of web service providers, a large number of nonfunctional services with the same or different properties such astime, availability, reliability and delay have been published on the web. When a service is not able to answer the applicatoralone, the service composition to respond the user requests can beuseful. The purpose is finding the best combination of services with awareness of quality, so that the high quality of combinationand low response time to customer are achieved. Evaluation of all combinations of these services is very time consuming and is apart of NP-HARD Problem. In this paper, a new method for service composition using the cuckoo optimization algorithm(COA) and artificial bee colony (ABC) algorithm is proposed. With important aspects for a cloud computing based on qualitative parameters (QOS) in real environment, the simulationis performed in this paper. The simulation results of the proposed approach are showed the effective combination with highperformance. Moreover, in this paper, the dynamic cloud environment and appropriate objective function are a majorconsideration.

Cloud computing; service composition; cuckoo optimization algorithm (COA); artificial bee colony (ABC) algorithm