Аналитическая модель передачи QoS-данных с помощью периодических резервирований и Stop-and-Wait ARQ
Network coding is a paradigm in data transport that allows a network node to code information flows before forwarding them. While it has been theoretically proven that network coding saves bandwidth and increases throughput of multicast communication, it does not directly consider the quality of service (QoS) requirements of multicast routing. In this paper, we study the problem of establishing minimum-cost, multiple multicast sessions over coded packet networks to meet the statistical QoS target considering boundedend-to-end statistical delay and jitter from source to each destination. For this purpose, we first propose a path-based formulation for the problem and prove that this problem is NP-hard. Then, in order to obtain an exact solution, we present an effective and efficient decomposition approach in which the problem is decomposed in to master problem and subproblems, and the solution is built up successively by feasible path generation.Computational results on random networks show that the proposed method provides an efficient way for solving the problem, even for relatively large networks.
We describe a new recommender system for the Russian interactive radio network FMhost. The new recommender model combines collaborative and user-based approaches. The system extracts information from tags of listened tracks for matching user and radio station profiles and follows an adaptive online learning strategy based on user history. We also provide some basic examples and describe the quality of service evaluation methodology.
In this article we review a class of Wireless Sensor Networks (WSNs), which are engaged in the reception, transmission and processing of audio data. Unlike audio sensor networks, where the network is used to collect and analyze audio data, in streaming audio sensor networks we have a problem with energy efficiency and quality of services (QoS). The main area of such WSNs is rescue operations. The article is highlighted factors affecting the energy of sensors, discussed approaches to reduce energy consumption and introduced requirements for QoS. A review of studies showed the absence of a common approach to the energy efficiency transmission of audio data, because it is difficult to estimate appropriate methods.
In this article comparative analysis of two methodologies of client satisfaction evaluation - CSI and NPS - is given. Based on this analysis it is proved that in case of tuning of NPS up to Russian specifics it better fits authors criteria for services industry. Necessity for testing of western NPS methodology before its mass use in practice of companies on Russian market is justified. Main results of adaptation of present methodology in Russia (with example of insurance industry) are given.
Proceedings of 16th International Conference on Next Generation Wired/Wireless Advanced Networking
We describe a new recommender system for the Russian interactive radio network FMhost. The underlying model combines collaborative and user-based approaches. The system extracts information from tags of listened tracks for matching user and radio station profiles and follows an adaptive online learning strategy based on user history. We also provide some basic examples and describe the quality of service evaluation methodology.