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There has been an increasingly popular trend that content caching becomes an inherent underlay capability in network routers. This poses new challenges, and we believe that if not well provisioned, such capability may even degrade network performance. Among the challenges, we are interested in how the in-network caching capability should be best provisioned to improve the overall network performance...
P2P applications impose an enormous traffic load on the Internet. Actually, however, topological difference between P2P network and underlying physical network (Internet network) is creating inefficient use of the physical network resources. To this problem, we propose P2P download control methods using router network parameters (e.g., number of router-hops, TCP window size and RTT) that can achieve...
Take a research in depth on the modeling problem of service path selection based on SON. Firstly, the optimal model is built with the optimal goal of balanced loading and with the functional constraints of users for composed service and multi-QoS constraints. Then the layered method and improved Ant algorithm are adopted to solve this problem. Finally, a simulated emulation is made to the algorithm,...
Most operations of Content Distribution Network (CDN) have measured to evaluate the ability to serve users with content or services they want. Activity measurement process provides the ability to predict, monitor and ensure activities throughout the CDN. Five parameters or regular measurement units are often used by content providers to evaluate the operation of CDN including Cache hit ratio, reserved...
Network virtualization can diversify the future Internet architecture into separate virtual networks according to different applications and requirements. Telecom operators adopt network virtualization technologies to design virtual networks to meet users' requirements and achieve high efficiency, low cost, controllability, etc. Previous researches focus on virtual networks construction based on restriction...
MapReduce has emerged as a model of choice for supporting modern data-intensive applications. The model is easy-to-use and promising in reducing time-to-solution. It is also a key enabler for cloud computing, which provides transparent and flexible access to a large number of compute, storage and networking resources. Setting up and operating a large MapReduce cluster entails careful evaluation of...
The existing load balancing technology in the content distribution network (CDN) only emphasizes even load distribution among servers, and it does not make the best of network topological information and the historical information of file accessed, so user request can not get timely response. To solve the above problem, this paper presents a load balancing a algorithm based on the Distributed binning...
The Scalable Adaptive Multicast Research Group (SAM RG) within the Internet Research Task Force (IRTF) is chartered to define a hybrid multicast protocol that opportunistically combines overlay multicast protocols and native multicast protocols to create and maintain hybrid multicast trees. A design for SAM hybrid multicast trees has been proposed that leverages the AMT multicast tunneling protocol...
Internet is a complex network with the characteristic of self-organized criticality. The cascading dynamics of Internet are presented and two reasons are pointed out, which may cause cascading failures. Different from betweenness centrality, a congestion function to represent the extent of congestion is proposed. By introducing the concept of "delay time", the correlation between permanent...
'Robust yet fragile (RYF)' is a major feature of Internet survivability. The cascading failure, which is caused by attacks or configuration mistakes, is one of the most serious incidents impact on the network survivability. Taking aim at this incident, this paper proposes a simple 'load-capacity' model based on the 'self-organized criticality' and the 'highly optimized tolerance' theories in complex...
This paper discusses and evaluates the behaviour o fa DS-TE algorithm (DiffSev aware MPLS traffic Engineering) called PEMS, and a dynamic multipath routing algorithm for load balancing (LBWDP), applied on a huge topology that correspond to real network. To clarify network topologies and routing algorithms that are suitable for MPLS traffic engineering, we evaluate them from the viewpoint of network...
Internet is a complex network with the characteristic of self-organization criticality, and the evolvement of network will inevitably lead to a critical state, which makes the probability of system happening cascading failures increase significantly. This paper introduces the characteristics of dynamics and topology of Internet, analyzes the reasons of cascading failures occurred in details, discusses...
In complex networked systems, such as the Internet, power grids, and communication networks, the loadings of the network nodes may cause a network collapse. To prevent the ensuing economic and quality of service related losses, we need to understand the mechanisms of how local and global loadings cause network wide effects in complex networked systems. In this paper we will study this issue by MCMC...
Most network operators have considered reducing Label Switched Routers (LSR) label spaces (i.e. the number of labels that can be used) as a means of simplifying management of underlaying Virtual Private Networks (VPNs) and, hence, reducing operational expenditure (OPEX). This letter discusses the problem of reducing the label spaces in Multiprotocol Label Switched (MPLS) networks using label merging...
In this paper, we propose an adaptive pacing scheme at the link layer for IEEE 802.11 based multihop wireless networks. Our objective is to improve the performance of higher layer protocols without any modifications to them. Our adaptive pacing scheme estimates the four-hop transmission delay in the network path without incurring any additional overheads, and accordingly paces the packets to reduce...
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