Ying Yan

Ying Yan
Technical University of Denmark | DTU

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24
Publications
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1,596
Citations

Publications

Publications (24)
Article
Full-text available
Cloud Radio Access Network (C-RAN) is a novel mobile network architecture which can address a number of challenges the operators face while trying to support growing end-user's needs. The main idea behind C-RAN is to pool the Baseband Units (BBUs) from multiple base stations into centralized BBU Pool for statistical multiplexing gain, while shiftin...
Article
TThe growing energy consumption has posed new challenges for the future development of networks. Some earlier work has proposed solutions to improve energy consumption based on the existing control plane, for example, node/links sleeping. This study presents a new possibility to reduce network energy consumption by proposing a new integrated contro...
Conference Paper
Mobile networks are constantly evolving: new Radio Access Technologies (RATs) are being introduced, and backhaul architectures like Cloud-RAN (C-RAN) and distributed base stations are being proposed. Furthermore, small cells are being deployed to enhance network capacity. The end-users wish to be always connected to a high-quality service (high bit...
Conference Paper
This paper presents a Software Defined Networking (SDN) control plane based on an overlay GMPLS control model. The SDN control platform manages optical core networks (WDM/DWDM networks) and the associated access networks (GPON networks), which makes it possible to gather global information and enable wider areas' energy efficiency networking. The e...
Conference Paper
The LTE standards is leading standard in the wireless broadband market. In order to accommodate the increased demand for mobile data services the radio interface in the LTE standard is enhanced with advanced technologies such as OFDMA (Orthogonal Frequency Division Multiple Access) and MIMO (multiple antenna) techniques. The Radio Resource Manageme...
Article
Energy management strategy has been considered as an important component in the future Ethernet Passive Optical Networks (EPONs). In this paper, a sleeping mode operation is studied, and a downlink packet scheduling scheme is analyzed to preserve energy consumption and maintain the required QoS. This paper proposes a novel sleep-mode downlink packe...
Article
As concerns about energy consumption grow, the power consumption of the EPON becomes a matter of increasing importance. In respect of energy efficiency, the current standard has no management protocols aiming to reduce power consumption in EPONs. In this paper, we propose an Energy Management Mechanism (EMM) for downlink EPON systems. The proposed...
Article
This paper introduces sleep mode operations for EPON. New MAC control functions are proposed to schedule sleep periods. Traffic profiles are considered to optimize energy efficiency and network performances. Simulation results are analyzed in OPNET modeler.
Conference Paper
As concerns about energy consumption grow, the power consumption of the EPON becomes a matter of increasing importance in the heterogeneous networks. In respect of energy efficiency, the current standard has no management protocols aiming to reduce power consumption in EPONs. To increase energy efficiency while satisfying diverse QoS requirements,...
Conference Paper
In the past few years, Ethernet Passive Optical Networks (EPONs) have rapidly gained large popularity in broadband access networks. However the current standard has no management protocols aiming at reducing power consumption. In this paper, we propose an Energy Management Mechanism (EMM) within the IEEE 802.3ah control scheme. The main idea is to...
Conference Paper
In this paper, we tackle the load balancing problem in Integrated Optical Wireless Networks, where cell breathing technique is used to solve congestion by changing the coverage area of a fully loaded cell tower. Our objective is to design a load balancing mechanism which works closely with the integrated control scheme so as to maximize overall net...
Conference Paper
In this paper we cover the problem of load balancing in terms of optimum cell selection and wireless channel condition in the hybrid optical wireless network. For a given set of multimedia users with minimum quality of service requirements and a set of best effort users we find the optimum resource allocation that guarantees services for the users...
Conference Paper
A new aspect in the design of future network is the energy efficiency. An energy management mechanism is proposed and evaluated for the Ethernet Passive Optical Network (EPON). With regard to power saving, a sleep mode operation is developed at the Optical Network Unit (ONU). Therefore, power is conserved by switch off some operating functions. The...
Conference Paper
This paper proposes a topology-based hierarchical scheduling scheme using deficit round robin (DRR). The main idea of the topology-based hierarchical scheduling is to map the topology of the connected network into the logical structure of the scheduler, and combine several token schedulers according to the topology. The mapping process could be com...
Conference Paper
Efficient utilization of available bandwidth over hybrid optical wireless networks is a critical issue, especially for multimedia applications with high data rates and stringent Quality of Service (QoS) requirements. In this paper, we propose an integrated resource management including an enhanced resource sharing scheme and an integrated admission...
Conference Paper
Carrier Ethernet is becoming a favorable access technology for next generation network (NGN). The features of cost-efficiency, operation flexibility and high bandwidth have a great attraction to service providers. However, to achieve these characteristics, Carrier Ethernet needs to have quality of service (QoS) provisioning abilities, which guarant...
Conference Paper
The hybrid optical wireless (HOW) network has been viewed as a promising solution to meet the increasing user bandwidth and mobility demands. Due to the basic differences in the optical and wireless technologies, a challenging problem lies in the Media Access Control (MAC) protocol design so that it can support stringent Quality of Service (QoS) re...
Article
The hybrid optical wireless network has gained interest for future access networks. In order to guarantee quality of service (QoS), especially for the multi-media services, resource management and scheduling mechanism become critical design issues in the hybrid optical wireless network. Various scheduling algorithms have been proposed in either opt...
Conference Paper
Recent research activities about hybrid optical wireless networks become attractive. In this paper, we provide an overview on integration of an Ethernet passive optical network (EPON) and a worldwide interoperability for microwave access (WiMAX) network. Gateway node that integrates both optical scheduling and wireless scheduling functions gains mo...
Article
Real time multimedia applications such as video streaming have been greatly introduced in networks and require Quality of Service (QoS). In MPLS based networks, OSPF with traffic engineering is widely used. It is responsible for finding feasible routes within networks, which have link state constraints such as bandwidth or delay. To serve dynamical...