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For IoT applications that require near real-time wireless connections, the traditional TCP protocol is not adept enough due to the size of its packet header, its conservative Additive Increase Multiplicative Decrease (AIMD) congestion control algorithm and its slow start strategy. This paper mainly evaluates three kinds of reliable UDP-based transport protocols namely, RUBDP, UDT, and PA-UDP, for...
Machine-to-Machine (M2M) communication technology is emerging as one of the major trends shaping the development of services in Smart Cities. However, there are grand challenges related to complexity in integrating existing vertical silos limiting services interoperability. Providing standard M2M platforms allows the interaction of billions of devices and services in a network independent way. In...
Linking the communication and the information technology infrastructures forms the new Machine-to-machine (M2M) communication trend. We aim to exploit available standard protocols to support smart cities applications. In this paper, we report the work of implementing and evaluating the performance of using request/response protocols for M2M communications. The paper also introduces a mechanism to...
One of the key questions for future networks is how to efficiently transfer data traffic generated by versatile applications in heterogeneous and fast changing environments. The lesson learned from the history of the Internet is that congestion control performed by TCP can be a solution. However, due to the limitations of TCP versions a novel paradigm applying fountain code based transfer seems to...
Military tactical networks require reach back connectivity, and in most cases the only viable solution is a combination of satellite and radio links. This hybrid network is characterized by long delay, transmission errors and relative low capacity. Geostationary satellites add a substantial time delay. Terrestrial wireless packet networks might introduce comparable delays and jitter. Mobility and...
Today's laptops and mobile terminals are equipped with several network interfaces belonging to different access technologies. Users can benefit from multi-homing to access network services anywhere, at any time and from any network. Multipath TCP (MPTCP) is a modified version of Transmission Control Protocol (TCP) which allows a TCP connection to simultaneously send data over multiple paths. One of...
High availability WAN connectivity can be achieved with a single service provider link built with high quality hardware, redundancy, and SLA guarantees, or by bundling a number of inexpensive connections together, similar to RAID for computer storage. In this paper, we investigate the performance of a Redundant Array of Independent Internet Connections (RAIIC). We discuss proper planning and signaling...
In the current mobile network context, a Mobile Node can change its point of attachment to different networks so frequently that basic Mobile IPv6 has many difficulties in preversing system quality in handover process. This problem has attracted the attention of many research groups and also gained certain achievements. Our paper focuses on analysing, comparing and synthesizing published Mobile IPv6...
Monitoring and measurement of wireless networks play an important role for a number of reasons. In current networking scenarios, middleboxes (NAT, firewall, PEP, PCMS, ...) are more and more common. In this paper we present preliminary results of our ongoing work on the monitoring and measurement of the performance of real operational wireless networks in the presence of middleboxes. We analyze the...
Application migration is a promising technique to enable users of computational devices to continue a task even though the executing device changes. One key challenge to realise application migrations is to maintain the network sessions in case a network based application is migrated. This article presents a solution to maintain network sessions in application migration scenarios. We develop a prototype...
Satellite communication has become important in the current global data communication due to its large coverage area. Satellite links are affected by two major concerns: long propagation delays, and relatively high error rates. Standard TCP congestion control variants were not designed to address these challenges. They generally depend on round trip times (RTTs), and hence suffer heavily if the RTTs...
This paper demonstrates a File delivery Protocol called as CCSDS File Delivery Protocol (CFDP). CFDP is a Consultative Committee for Space Data System (CCSDS) Protocol. It is applicable for use in data transfer from Onboard Space Craft to Ground Station and Vice Versa. First part of paper talks about necessity of specialized protocol like CFDP followed by futures of CFDP. Design of CFDP is explained...
TCP Noordwijk has been designed and implemented to optimize short transfers (i.e. HTTP traffic) over satellite links, while assuring good performance for long transfers (e.g., FTP) as well. It was developed in the frame of an European Space Agency (ESA) project [†]. Its target scenario is a controlled communication environment adopting DVB-RCS standard between I-PEPs. A rich test campaign to both...
Networks are at the core of global communication. The impact network changes have on network performance has been of concern to researchers. In various configurations, network performance has been evaluated using many methods. The paper presents findings of a network performance evaluation where multiple hardware routers were implemented on a test-bed and performance difference between the two versions...
The spread use of wireless sensor networks (WSNs) in a variety of fields, ranging from the military to environmental protection, has drawn the attention of researchers to this type of networks. Despite their use in interesting applications, such as healthcare and surveillance, many shortcomings derived from their small size and constrained batteries limit their use, calling for solutions to enhance...
This paper investigates the performance enhancement of IEEE 802.11 used in a radio-over-fiber architecture. It is shown that data throughput can be improved by modifying the ACK timeout value and the slottime parameter value defined in IEEE 802.11. In this study, both UDP and TCP packet transmission were taken into account.
In this paper we investigate the performance of Cellular networks, focusing on the key mail and webmail services. Specifically, the primary motivation of this research is to compare mail and webmail performance and to discuss different factors that affect performance as perceived by end users. We discuss key factors related to the network configurations, e.g., proxies, that can bias the computation...
As the Internet becomes an essential tool for our daily activities, Web service, a new form of software technology to use remote services, is emerging. Web Services receive significant research recently from both academia and industry due to its broad applications and flexible architecture. Usually they are accessible through standard internet protocols like HTTP, but within mobile communication networks...
Streaming media application has attracted more and more attention nowadays. However, how to improve the quality of service (QoS) for streaming media application is still a challenging issue. The emerging transport protocol - Mul-TCP Friendly Rate Control (MulTFRC), which gives different priorities to data flows, could be used in streaming applications or similar use cases. On our test bed, some streaming...
In this paper, we propose a new ARQ scheme, named Go-Back-i-symbol (GBi) ARQ scheme which is suitable to Meteor Burst Communications (MBC). The scheme is based on the Viterbi decoding algorithm for convolutional codes and can achieve symbol-wise retransmission, so that it has high throughput performance for packet communication systems over time varying short burst channels such as MBC channels. We...
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