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In cellular mobile wireless networks, nonlinear channel fading is always a critical factor which will scientifically deteriorate the Quality of Service (QoS) for the users. However, it is difficult to describe the nonlinear channel fading by precise mathematical model because of its complexity. So, the control of wireless networks becomes an especial tough work. In this paper, a power and rate control...
Existing power and rate control methods for wireless communication networks aim to maximize the system capacity and the network throughput, and attempt to increase the quality-of-service (QoS), but cannot guarantee the QoS. This paper presents a new power and rate control method for wireless communication networks, which is based on the priority of QoS, so the QoS can be guaranteed. A dual closed-loop...
Soft resource allocation is an important factor of system configuration which plays a critical role in guaranteeing the performance of multi-tier web service systems. There is a tradeoff between real-time performance and resource consumption, and thus the real-time adjustment of soft resource allocation in response to dynamic workload is quite challenging. In this paper, we propose a real-time soft...
Software Defined Networking (SDN) is emerging as a new paradigm in which the control plane is decoupled from the data plane. SDN architectures enable the abstraction of network elements from the chaos of infrastructures to be service resources. The deployment of applications and network services can be largely simplified by taking advantage of the standardized open Application Program Interface (API)...
In this paper, we investigate the energy-efficient transmission problem by resource allocation in SCMA networks. We formulate it as an optimization problem to maximize the network energy efficiency (EE) subject to quality-of-service (QoS) requirements, codebook assignment, power allocation, and subcarrier reuse constraints. Due to its mixed combinatory, we separate codebook assignment and power allocation...
A novel scheme capable of dynamic wavelength assignment and burst contention mitigation is proposed to achieve efficient optical burst flow grooming in the OpenFlow controlled LOBS-over-WSON network. Simulation and experiment verified its feasibility.
In service-oriented environments (e.g. Cloud Computing or Utility Computing), automated service discovery is crucial to enable self-organizing technical components that are able to discover and consume services autonomously. To this end, precise and robust service discovery algorithms are desirable. In this paper, we propose an approach combining both syntactic and semantic search to increase accuracy...
Survivability is a key issue in optical grids. In this paper, a resilient Optical Burst Switching (OBS) / Generalized Multi-Protocol Label Switching (GMPLS) network scenario, in which both the protection/restoration in the OBS layer and GMPLS layer and the resilient resource discovery and management scheme are experimentally demonstrated and theoretically analyzed. The results show that the proposed...
The provisioning of fairness among various networking and communication applications is an important quality-of-service (QoS) demand and becomes a challenging research topic. Deficit Round Robin (DRR) is a promising fair scheduling mechanism owing to its low complexity and excellent ability of achieving a good degree of fairness in terms of throughput. Although self-similar traffic has been found...
Contemporary communication networks are expected to support multimedia services which require differentiated quality-of-services (QoS). To this end, many traffic scheduling schemes have been proposed and extensively studied. Recently, a hybrid scheduling discipline which integrates priority queueing and generalized processor sharing (GPS) has been emerging as a promising scheme for QoS differentiation...
A testbed of OBS/GMPLS interworking network is established with the supporting of the BUPT-KDDI cooperation project. A dedicated GMPLS border controller with necessary GMPLS extensions and some OBS extensions are introduced in this network to achieve a dynamic, efficient and transparent inter-domain burst header packet (BHP) and data burst (DB) transmissions over the GMPLS-controlled optical circuit...
Various survivability schemes for the end-to-end transparent optical connectivity in OBS/GMPLS networks are experimentally demonstrated by using streaming media transmission. The results validate the applicability of such reliable connectivity to the high quality services.
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