219 research outputs found
User-space Multipath UDP in Mosh
In many network topologies, hosts have multiple IP addresses, and may choose
among multiple network paths by selecting the source and destination addresses
of the packets that they send. This can happen with multihomed hosts (hosts
connected to multiple networks), or in multihomed networks using
source-specific routing. A number of efforts have been made to dynamically
choose between multiple addresses in order to improve the reliability or the
performance of network applications, at the network layer, as in Shim6, or at
the transport layer, as in MPTCP. In this paper, we describe our experience of
implementing dynamic address selection at the application layer within the
Mobile Shell. While our work is specific to Mosh, we hope that it is generic
enough to serve as a basis for designing UDP-based multipath applications or
even more general APIs
IPv6 Multihoming Support in the Mobile Internet
Fourth-generation mobile devices incorporate multiple interfaces with diverse access technologies. The current Mobile IPv6 protocol fails to support the enhanced fault tolerance capabilities that are enabled by the availability of multiple interfaces. In particular, established MIPv6 communications cannot be preserved through outages affecting the home address. In this article,
we describe an architecture for IPv6 mobile host multihoming that enables transport layer survivability through multiple failure modes. The proposed approach relies on the cooperation between the MIPv6 and the SHIM6 protocols.Publicad
Multihomed mobile network architecture
IP mobility ensures network reachability and session continuity while IPv6 networks are on the move. In the Network Mobility (NEMO) model, the potential for NEMO Mobile Routers (MRs) to interconnect and extend Internet connectivity allows the formation Nested NEMO networks. With MANEMO, nested MRs can be efficiently interconnected in a tree-based structure with Internet access being maintained via a designated Gateway. However, this only supports single-homed Internet connectivity. With the span of wireless access technologies and the popularity of multi-interfaced devices, multihoming support in this scenario becomes critical. A Nested Mobile Network with heterogeneous available Internet access options would allow better overall network performance and optimal utilisation of available resources. In this paper, we present the Multihomed Mobile Network Architecture (MMNA), a comprehensive multihomed mobility solution. It provides a multihoming management mechanism for Gateway Discovery and Selection on top of a multihomed mobility model integrating different mobility and multihoming protocols. It enables a complex nested multihomed topology to be established with multiple gateways supporting heterogeneous Internet access. The results demonstrate that the proposed solution achieves better overall throughput, load sharing, and link failure recovery
A QoS-Driven ISP Selection Mechanism for IPv6 Multi-homed Sites
A global solution for the provision of QoS in IPng sites must include ISP selection based on per-application requirements. In this article we present a new site-local architecture for QoS-driven ISP selection in multi-homed domains, performed in a per application basis. This architecture proposes the novel use of existent network services, a new type of routing header, and the modification of address selection mechanisms to take into account QoS requirements. This proposal is an evolution of current technology, and therefore precludes the addition of new protocols, enabling fast deployment. The sitelocal scope of the proposed solution results in ISP transparency and thus in ISP independency.This research was supported by the LONG (Laboratories Over the Next Generation Networks) project IST-1999-20393.Publicad
Enhanced Mobility Solution In Mobile Ipv6 Network
The performance of Network Mobility (NEMO) used to manage network mobility does
not provide satisfactory result in terms of delay, throughput and session continuity when
dealing with multihomed mobile network. Enhanced Mobility Solution in Mobile IPv6
Network is extremely complex; the study addressed the multihoming issues of MIPV6
Networks on the basis of NEMO Basic Support, analyzes the benefits of multihoming
and discusses implementation issues of all classes of multihoming possibilities.
Additionally, Policy-based routing, as one of the multihoming benefits, is studied in
particular.
A framework based on policy based routing protocol was proposed for handling both the
inbound and the outbound traffic on a mobile network, under specified policies which
consider packet characteristics, current network situation and user preferences. The
interface selection algorithm was based on NEMO implementation structure using a
technique of mutihoming which was extended to MIPv6 concepts The outcome of this research work are: a designed policy protocol for policy messages
communication between the Mobile Router and the Home Agent, the framework is
simulated using Network Simulator (NS2) with an extension of mobiwan, the result
shows the end to end delay, average end to end delay, overhead, optimal routing path,
average inter-packet latency and throughput of the developed system. The information
from the analysis of the result shows that the enhanced solution has drastically reduced
average packet delay to minimum with 72.5 %( 0.040s to 0.011s), and end-end delay with
75 %( 0.020s to 0.005s) compared with NEMO solution. Overhead in the mobile network
was maintained by 10bytes per nested level by keeping the session.
The solution is important by enterprises in making decision to acquire internet
connectivity for the purpose of connectivity redundancy and traffic load distribution
optimization. This result is very important for time sensitive application that requires
stable network condition
Towards an architecture to support complex multihomed mobility scenarios
In this paper, we present the Multihomed Mobile Network Architecture (MMNA), a comprehensive multihomed mobility solution for complex nested mobility scenarios. It provides a multihoming management mechanism for gateway discovery and selection, on top of an efficient multihomed mobility model integrating different mobility and multihoming protocols. We describe how the MMNA was experimentally implemented and evaluated in a testbed setup. We first validated the capabilities of the solution in terms of different multihoming features, namely load sharing, link failure recovery, and preference setting. We then examined the effectiveness and feasibility of the MMNA solution considering a use case example of a search and rescue scenario. The results highlight the practicality and advantages of deploying the MMNA solution into realistic scenarios
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Multimedia delivery in the future internet
The term “Networked Media” implies that all kinds of media including text, image, 3D graphics, audio
and video are produced, distributed, shared, managed and consumed on-line through various networks,
like the Internet, Fiber, WiFi, WiMAX, GPRS, 3G and so on, in a convergent manner [1]. This white
paper is the contribution of the Media Delivery Platform (MDP) cluster and aims to cover the Networked
challenges of the Networked Media in the transition to the Future of the Internet.
Internet has evolved and changed the way we work and live. End users of the Internet have been confronted
with a bewildering range of media, services and applications and of technological innovations concerning
media formats, wireless networks, terminal types and capabilities. And there is little evidence that the pace
of this innovation is slowing. Today, over one billion of users access the Internet on regular basis, more
than 100 million users have downloaded at least one (multi)media file and over 47 millions of them do so
regularly, searching in more than 160 Exabytes1 of content. In the near future these numbers are expected
to exponentially rise. It is expected that the Internet content will be increased by at least a factor of 6, rising
to more than 990 Exabytes before 2012, fuelled mainly by the users themselves. Moreover, it is envisaged
that in a near- to mid-term future, the Internet will provide the means to share and distribute (new)
multimedia content and services with superior quality and striking flexibility, in a trusted and personalized
way, improving citizens’ quality of life, working conditions, edutainment and safety.
In this evolving environment, new transport protocols, new multimedia encoding schemes, cross-layer inthe
network adaptation, machine-to-machine communication (including RFIDs), rich 3D content as well as
community networks and the use of peer-to-peer (P2P) overlays are expected to generate new models of
interaction and cooperation, and be able to support enhanced perceived quality-of-experience (PQoE) and
innovative applications “on the move”, like virtual collaboration environments, personalised services/
media, virtual sport groups, on-line gaming, edutainment. In this context, the interaction with content
combined with interactive/multimedia search capabilities across distributed repositories, opportunistic P2P
networks and the dynamic adaptation to the characteristics of diverse mobile terminals are expected to
contribute towards such a vision.
Based on work that has taken place in a number of EC co-funded projects, in Framework Program 6 (FP6)
and Framework Program 7 (FP7), a group of experts and technology visionaries have voluntarily
contributed in this white paper aiming to describe the status, the state-of-the art, the challenges and the way
ahead in the area of Content Aware media delivery platforms
Selection and publication of network interface cards in multihomed pervasive computing devices
Proceedings of the 8th IEEE International Workshop on Middleware and system support for pervasive computing, march 21-25, 2011, Seattle, USAMany modern devices come with several, heterogeneous,
network interface cards (NICs). However, simple
operations like transferring data flows to the cheapest NIC or to
one with enough Quality of Service (QoS) are awkward tasks on
most Operating Systems. In this paper, we discuss the criteria
to select the proper NIC for a given data flow. We also present
a new Operating System service, called netqos, to publish data
and figures of merit for these criteria. The main objective of
netqos is providing relevant information to applications and
middleware about NIC selection criteria, isolating them from
the idiosyncrasies of the many QoS gathering tools and allowing
to choose the proper NIC to fit their needs. We have built this
new service as a synthetic file system for the Linux kernel. We
describe our experiences in using it in a real-world scenario
and the practical and inherent limitations of this approachProyecto CCG10-UC3M/TIC-4992 de la Comunidad Autónoma de Madrid y la Universidad Carlos III de Madri
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