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In this paper a two level resource allocation scheme is proposed to enhance the Quality of Service (QoS) for multimedia services in LTE downlink system. It corresponds to a solution that combines cooperative game theory, a virtual token mechanism, and the EXP-RULE algorithm. By using cooperative game theory such as bankruptcy game and Shapley value, the(More)
Wireless sensors networks (WSNs) are traditionally composed of large number of low-cost and tiny homogenous sensors nodes connected through a wireless network that gather data to be treated locally or relayed to the sink node through multi-hop wireless transmission. Moreover, such issues are very critical due servers resources constraints like efficient(More)
Localization of mobile nodes has been a fundamental issue for wireless sensor networks. The existing localization algorithms can be classified into two categories: range-based and range-free. Range-free scheme is more cost-effective than range-based scheme. This paper proposes a two-level range-free localization algorithm (2RaLA), which consists of two(More)
For most of the applications in wireless sensor networks, localization is fundamental and essential. The localization systems can be categorized into two types: range-based and rangefree. In this paper, we propose a new range-free localization algorithm. The basic principle of this algorithm is to define two classes of nodes according to the number of(More)
Optical grid systems have been viewed as a promising virtual computing environment to support distributed real-time directed acyclic graph (DAG) applications. For such a system involving many heterogeneous computing and network resources, faults seem to be inevitable. Therefore, a fault-tolerant DAG scheduling scheme is necessary to improve the performance(More)