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Service management which includes the analysis of service profit chain, service interaction and quality interaction, informative technology in service quality management and contract product marketing in service industry with which in manufacturing, aims to study how to manage enterprises successfully in service competition. This paper discusses the formation of service management background, and...
Mobile WiMAX's scheduling service is a key factor in Radio Resource Management (RRM) in realizing Quality of Service (QoS). The choice in scheduling algorithm for Mobile WiMAX base stations, albeit outside of the scope of the standard, critically impacts the performance and robustness of Mobile WiMAX networks. This paper provides an in-depth study of four major scheduling algorithms: Round Robin (RR),...
In this paper, we address the problem of maximizing sensor networks lifetime as well as maintain sufficient sensing coverage. The problem of computing redundant sensing areas among neighboring heterogeneous sensors is analyzed. We present a mathematical model to compute the redundancy degree of each sensor without the knowledge of location information for heterogeneous wireless sensor networks. Based...
In wireless communications, packet size is one of the most significant parameters that have an impact on the quality of service (QoS). The optimal packet size depends on wireless channel condition and reception performance. However, it is difficult to determine the optimal packet size under time-varying channel in advance. Besides, performance characteristic of wireless devices is virtually unpredictable...
In this paper, we analyze the performance of mobile real time services in a large-scale IEEE 802.11 multi-hop network. We present our field measurements with discussion of performance bottlenecks for VoIP services under mobile scenarios. We utilized our test bed which is located in Nebraska and supported by the University of Nebraska-Lincoln (UNL), US Federal Railroads Administrations (FRA), and major...
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