The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper investigates and compares the performance of the popular VoIP codecs G.711, G.723.1 and G.729A over an IP network based on SIP architecture, using RTP as a transport protocol. This is based on different simulations in order to evaluate the performance of each codec and to find the optimal codec. For this objective this paper analyzes Quality of service (QoS) parameters, principally delay,...
The goal of this work is to characterize scientific data transfers and to determine the suitability of dynamic virtual circuit service for these transfers instead of the currently used IP-routed service. Specifically, logs collected by servers executing a commonly used scientific data transfer application, GridFTP, are obtained from three US super-computing/scientific research centers, NERSC, SLAC,...
In this paper, we propose a distributed fault localization protocol for localizing multi-link failures in EPC global networks. the protocol is based on a parallel limited-perimeter vector matching (P-LVM) mechanism, which restricts fault localization within a smaller perimeter area and can thus significantly reduce fault localization time. by performing a fault localization process sequentially in...
The Internet has now become such an important infrastructure that is capable of sending information within a very short time and easy to access. It is considered as public networks that provide affordable WAN services to most customers. Applications such as video conferencing, file transfer protocol and VoIP are the example of typical network applications supported by the Internet Protocol. Various...
Due to the US Government's cancellation of the Transformational Satellite Communications (TSAT) program, Internet Protocol (IP) networking using Military Satellite Communications (MILSATCOM) is not currently planned. In order to support military IP based communications over MILSATCOM systems; affordable, effective and efficient solutions must be developed. An alternate near-term MILSATCOM networking...
Resolution from identifiers to locators serves as a key component of mapping-based mobility solutions. In this paper we address the weakness of current resolution methods in supporting diverse mobility scenarios and propose a Global Resolution Service offered by Resolution Service Providers. We present a preliminary design and simulation, and results show that our approach is able to provide better...
With the explosion in traffic consumption, the limitations of centralized mobility protocols became a concern. As a result, the concept of distributed mobility management (DMM) emerged. Basically, DMM brings the mobility anchors closer to the users, avoiding issues as single point of failure and non-optimal routing. On the other hand, IP multicast, being designed for efficiency, is a key method for...
Increasing demand for ubiquitous high speed data access has resulted in widespread deployment of heterogeneous wireless networking domains. Integration of heterogeneous networks presents some considerable challenges which include the demand for seamless handoff, continuity of data traffic & multimedia sessions and central authentication system, billing & security. In this paper the...
In this paper we discuss the architecture of MStack, a data-centric communications stack specifically designed for mobile intermittent networking environments. MStack contains native support for delay tolerant connections, it is resilient to disconnections, and solves other problems associated with mobile devices. The architecture and its main protocols are discussed, together with some examples of...
Most user terminals or Internet hosts are equipped with two or more interfaces that can simultaneously be attached to different access networks. These multihomed hosts can offer ubiquitous and cost-effective connectivity, while improving resiliency and bandwidth. Each interface would get an address (or locator) from the edge network to which it attaches. Thus the multihomed host has multiple locators...
A drastic increase in traffic of mobile broadband is seen in the past few years, which is further accelerated by the increased usage of smart phones and its applications. The availability of good smart phones and better data connectivity are encouraging mobile users to use video services. This huge increase in usage will pose a lot of challenges to the wireless networks. The existing wireless networks...
Internet Protocol (IP) suite and Ethernet physical layer are the current trend in home and industrial systems communication protocols. Unfortunately, in the field of power line automation protocols that are in wide use in home automation applications, the lack of IP convergence leads to difficulties, because of the variety and high costs of systems and solutions that need to be integrated. This paper...
With the media-independent pre-authentication (MPA), a mobile node (MN) performs the pre-authentication and pre-configuration to get the new care-of-address (nCoA) as the layer 3 handover before the layer 2 handover, in order to lessen handover delay. However, in reality, the MN may perform the layer 2 handover due to the link going down before completing the layer 3 handover. It will cause the packet...
In recent years, IEEE 802.11 Wireless Local Area Networks (WLANs) have emerged as one of the prevailing technologies for the broadband wireless access. Although IEEE802.16 wireless network has become a newer generation of wireless network, it will be used as wireless metropolitan area network in the beginning because of its price. IEEE 802.11 network will continue to be the most important wireless...
We propose an architecture of FL-net over Ethernet for a networked control system. FL-net over Ethernet is ease of broadcast which makes nodes exchange information easily and precisely. The proposed timed token passes among control units and determines which control unit has the data transmission right. Due to the token is unique in FL-net, only one control unit can send packets at time. This makes...
Multi-homing is a new feature of SCTP not existed in UDP or TCP. It allows multiple IP addresses to be attached to a single connection to improve stability of data transfer. It significantly enhances reliability and redundancy of transport layer in several levels - from multiple physical network interface cards to complete different logical end-to-end paths. Recently, SCTP protocol was officially...
Mobile and multimedia applications are more and more used in the current Internet. For these applications, a set of Transport protocols are proposed aimed at aiding the end-to-end communication. However, to face the challenge of providing a sufficient Quality of Service (QoS) to the final users, a new generation of Transport protocols that takes into account dynamically and autonomously the evolvement...
The current use of IP address in network application session identification cannot preserve the session when the IP address changes. Host Identity Protocol (HIP), which is an identity-location separation protocol, provides a better framework to build solutions for mobility, multihoming, and security by adding a host identity layer on top of the IP layer. Yet modifying the IP protocol stack and adding...
The use of multi-interface devices has grown at the same time as the demands for efficient mobility services in heterogeneous networks. In this scenario, service continuity has become a crucial requirement. In order to achieve these demands, efficient handover schemes should be deployed, aiming the Seamless Handover. However, handover delay and packet loss are still issues to be solved. The main purpose...
The 3GPP Long Term Evolution (LTE) is considered as a dominant future cellular wireless technology in terms of performance and user experience. With technological advancement of wireless networks, dependencies and business impact of mobile network services have also been increased phenomenally. It is, therefore, crucial to address issues regarding network infrastructure or service failure. In this...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.