Managing of incoming stream applications in online charging system Globa Larysa Prof, Dr., Skulysh Mariia, PhD, Podgurskaj Tatiana National Technical University of Ukraine “Kiev Polytechnic Institute” Kiev, Ukraine mb_s@ukr.net, lgloba@its.kpi.ua Andrii Reverchuk NVision Czech Republic, Prague, CZ Abstract— Qualitative online billing system performance is essential for cost-effective service providers. This paper presents the method of technical resources’ distribution of the bil ling server based on the resource requirements of different types of service that takes into account the daily load statistics of the different types of services and increases the revenue by providing an individual approach to services with different costs. The method of incoming billing requests’ flow management is proposed according to the requirements for technical resources. The developed method can reduce the loss of tariff requirements caused by the exceedence of maintenance time. The results of incoming billing requests’ flow management simulation have been obtained that prove the effectiveness of the proposed method. Keywords—3G mobile communication, multimedia communication, packet switching, quality of service, core function, online charging system, operators billing, packet switched networks, rating module I. INTRODUCTION The 3rd Generation Partnership Project (3GPP) Release 8 determines the specifications with low latency, high data speed of all-IP core network (CN) enabling the real-time packet service support for several access technologies, including novel Long-Term Evolution (LTE) access network. The industry of mobile communication is being developing. In order to stay competitive many mobile operators are being focused on the decrease in both capital and operating expenditures (CAPEX and OPEX) as well as concentrate on the outsourcing of several activities and/or by exchange of some network infrastructures. The objective of this article is to provide an overview of potential evolution of 3GPP in terms of Policy and Charging Control (PCC) as well as quality of service (QoS) of architecture in order to ensure more effective support of Fixed- mobile convergence (FMC) and more flexible interchange of CN decisions. For this purpose more definite business role distribution (for example, access and network providers) is proposed as well as the Network Policy function’s (NPF) introduction in order to control CN. II. DESCRIPTION OF THE RESEARCH The existing trend of service provisioning on IP-protocol gives rise to the wireless straightforward high bitrate Internet access for 3G/4G mobile customers, where mobile terminals serve as internet-connected IP-hosts [1, 10, 11]. Simplifying of the mobile terminals-to-Internet interfaces provides the steadily increasing range of services for the subscribers. Services fees’ evaluation require progressively more computation to determine their value, that consequently leads to the load increase on a tariff system, namely:  low efficiency of call service;  deterioration of both flexibility and efficiency of tariff approaches;  inability of QoS guaranteeing; The created 3G Partnership Project (3GPP) and ETSI TISPAN were intented to solve above mentioned problems. Within the framework of the project the Working Parties have been organized for developing IP Multimedia Subsystem (IMS) and dealing with:  support of real-time personal multimedia information exchange between different terminals, i.e.: voice, video-conference, games etc.  calls’ differentiation in terms of services and Subscriber Data;  service and application support in a single session connection;  deterioration of both flexibility and efficiency of tariff approaches;  flexibility of tariff approaches’ enhancement;  service monitoring on a network, session, application layers. A significant amount of studies and approaches are dedicated to the subscriber service quality surveillance. Methods of QoS provision during the data transmission are