The ability to locate network bottlenecks along end-to-end paths on the Internet is of great interest both operators and researchers. For example, knowing where bottleneck links are, can apply traffic engineering either at interdomain or intradomain level improve routing. Existing tools fail identify location bottlenecks, generate a large amount probing packets. In addition, they often require access end points. this paper we present Pathneck, tool that allows users efficiently accurately...

Recent advances in high speed rails (HSRs) are propelling the need for acceptable network service mobility environments. However, previous studies show that performance of traditional single-path transmission degrades significantly during due to frequent handoff. Multi-path with multiple carriers is a promising way enhance performance, because at any time, there possibly least one path not suffering In this paper, first we measure multi-path TCP (MPTCP) two cellular on HSRs peak 310km/h. We...

TCP has been the dominant transport protocol for mobile internet since its origin. Its behaviors play an essential role in determining quality of service/experience (QoS and QoE) apps. While extensively studied a static, walking, or driving mobility, it not well explored highspeed (> 200 km/h) mobility cases. With increasing investment deployment high speed rails (HSRs), critical demand understanding performance under extremely high-speed arises. In this paper, we conduct in-depth study to...

While TCP has been extensively studied in static and low speed mobility situations, it not yet well explored high scenarios. Given the increasing deployment of transport systems (such as rails), there is an urgent need to understand performance behavior such environments. In this paper, we conduct a comprehensive study investigate environment with peak 310 km/h. Over 16-month period spanning four years, collect 500 GB data on 3/4G networks trains China, covering distance 108,490 km. We start...

The explosive growth of the Internet over last few years has made IP protocol suite most predominant networking technology. Furthermore, convergence voice and data communications a single network infrastructure is expected to happen IP-based networks. Traditional IP-networks offer little predictability service, which often unacceptable for applications such as telephony, well emerging future real-time telemedicine. One primary goals traffic engineering enable networks predictable...

Recently, the performance of mobile data networks has been evaluated from many aspects, e.g., TCP/IP protocols, comparison with WiFi or even satellite communication, under different movements within a metropolis area. Nevertheless, result is still unknown in high-speed mobility scenarios and scale that crosses geographic areas. To fill this blank, we carry out comprehensive measurement study on mobility, i.e., 300 km/h above. Such speed current de facto standard China Railway High (CRH)...

Recent advances in Internet measurement tools have made it possible to locate bottleneck links that constrain the available bandwidth of paths. In this paper, we provide a detailed study path bottlenecks. We focus on following four aspects: persistence location, sharing bottlenecks among destination clusters, packet loss and queueing delay links, relationship with router link properties, including CPU load, memory traffic capacity. find 20% - 30% source-destination pairs our persistent...

In recent years, the Social Internet of Things (SIoT) has become a research hot topic in field wireless networks, which are inseparable relationships between human and devices. As huge numbers heterogeneous devices will be connected, it needs more frequency spectrum. The Cognitive radio (CR) technology can improve spectrum utilization an opportunistic communication manner. However, dynamic availability make difficult for routing design CR-SIoT. Opportunistic (OR) mitigate drawbacks from...

Recent advances in high speed rails (HSRs), coupled with user demands for communication on the move, are propelling need acceptable quality of services mobility scenarios. This calls an evaluation how well popular voice/video call applications, such as Skype, can perform paper presents first comprehensive measurement study Skype LTE networks HSRs a peak 310 km/h China. We collected 50 GB performance data, covering total HSR distance 39,900 km. various objective metrics (such RTT, sending...

The rapid growth of high-speed transit systems, such as High Speed Rail (HSR), is putting considerable pressure on TCP-based data transmission. It well known that TCP suffering from severe throughput degradation in mobility scenarios. root cause at the transport layer however remains unclear and largely undetermined to date. In this paper, we aim pinpoint bottlenecks develop a model understand environments. Based analysis real-world HSR traces, find will introduce significant challenges...

Multiparty interactive network applications such as teleconferencing, gaming, and online trading are gaining popularity. In addition to end-to-end latency bounds, these require that the delay difference among multiple clients of service is minimized for a good experience. We propose Latency EQualization (LEQ) service, which equalizes perceived all participating in an application. To effectively implement proposed LEQ support essential. The architecture uses few routers hubs redirect packets...

Recently, the increase of different services makes design routing protocols more difficult in mobile ad hoc networks (MANETs), e.g., how to guarantee QoS types traffics flows MANETs with resource constrained and malicious nodes. opportunistic (OR) can make full use broadcast characteristics wireless channels improve performance MANETs. In this paper, we propose a traffic-differentiated secure from game theoretic perspective, DSOR. proposed scheme, novel method calculate trust value,...

In opportunistic networks, nodes may appear some selfishness while transmitting the message, however, most of existing research works consider individual or social respectively, and these two types coexist in networks.In this paper, we propose an Incentive Aware Routing based on Game Theory for selfish OPPNETs, named IAR-GT, which uses Rubinstein-Stahl bargaining game model to incentivize cooperation data forwarding.IAR-GT scheme not only considers resources nodes, but also a new method...

The cluster global time can change in wireless sensor networks due to leader re-elections and node disabilities between two successive synchronizations, which will affect temporal relationships. This paper analyzes continuity, using models for the dynamics. results prove that defining average (AGT) is more stable than it a single node's local (SGT). With normally distributed clock-parameter assumptions, AGT bounds are at most 70.7% of those SGT's. impacts initial phase frequency skew...

Publish/Subscribe Systems are widely used in messaging systems due to loose coupling and asynchronous. As the number of objects participating message system increases, there has also been a spurt messages, which brings great challenges traditional event matching methods. After studying status quo case large-scale Uncertain Data, we proposed simple solution named NISU(New Index Structure on Data) for efficient matching. In scheme, use P-Skyline filter unrelated events subscriptions, then...

This article introduces two prevalent approaches of encapsulation used in data transport, GFP (generic framing procedure) and LAPS (link access procedure SDH), which have been greatly improved applied EOS (Ethernet Over SDH). The also gives some basic knowledge on the parameters data-transport performance. In addition, a number experiments taken hardware platform (a part MSTP device author's laboratory). result from experiment proved conclusion theoretical analysis when applying to...

GridFTP is a secure and efficient data transfer protocol in Grid. This paper proposes test scenario for the traffic features. Firstly it gives general description of testbed from aspects packet characteristics throughput distribution; then analyses self-similarity features their decomposed flows both WAN LAN. Analysis results show that parallel increases degree throughputs.

In this era of rapid intelligent transportation system development, sensors are widely applied for detection and surveillance on the road. It is necessary to reduce cost sensor devices by using fewer cover more roads, which prerequisite its large-scale application. However, deployment a network can be proved as NP-complete problem, so optimization intractable. paper, two independent solutions proposed analyzed. The comparison shows that one relatively suitable dense road while other fit...

Recent advances in high-speed rails (HSRs), coupled with user demands for communication on the move, are propelling need acceptable quality of experience (QoE) mobility environments. However, throughput declining significantly QoE existing HSRs is still far from satisfactory. In order to improve HSRs, this paper seeks answer question regarding which better two options: selection best cellular carrier applying single-path TCP or conjunction multiple carriers Multi-path (MPTCP). To end, we...

It is very difficult to test web performance on a smart mobile, where often an issue, because of lacking such kinds tools.In this paper, we provide new method let mobile developers find the bottlenecks their and hybrid applications easily.The based concept Timed Operation Execution Chart, which allows visualize internal execution order duration hundreds HTML processing operations for each page, without having change application or server.The proposed has been applied 3 typical preliminary...

IEEE 802.11 based wireless local area network (WLAN) has been in great growth and multimedia applications such as VoIP which requires high bandwidth, low latency packet loss are use. These require a delay of less than 150 msecs 3%. However, the traditional WLAN is usually more 200 MS exceeds 10%. Thus, it required to solve handoff problem satisfy people’ demand for applications. In this paper, we have brief introduction process. We analyzed existing mechanisms compare these ways their...