A novel multipath-transmission supported software defined wireless network architecture

The inflexible management and operation of today\u27s wireless access networks cannot meet the increasingly growing specific requirements, such as high mobility and throughput, service differentiation, and high-level programmability. In this paper, we put forward a novel multipath-transmission supported software-defined wireless network architecture (MP-SDWN), with the aim of achieving seamless handover, throughput enhancement, and flow-level wireless transmission control as well as programmable interfaces. In particular, this research addresses the following issues: 1) for high mobility and throughput, multi-connection virtual access point is proposed to enable multiple transmission paths simultaneously over a set of access points for users and 2) wireless flow transmission rules and programmable interfaces are implemented into mac80211 subsystem to enable service differentiation and flow-level wireless transmission control. Moreover, the efficiency and flexibility of MP-SDWN are demonstrated in the performance evaluations conducted on a 802.11 based-testbed, and the experimental results show that compared to regular WiFi, our proposed MP-SDWN architecture achieves seamless handover and multifold throughput improvement, and supports flow-level wireless transmission control for different applications

Raising the Datagram API to Support Transport Protocol Evolution

Some application developers can wield huge resources to build new transport protocols, for these developers the present UDP Socket API is perfectly fine. They have access to large test beds and sophisticated tools. Many developers do not have these resources. This paper presents a new high-level Datagram API that is for everyone else, this has an advantage of offering a clear evolutionary path to support new requirements. This new API is needed to move forward the base of the system, allowing developers with limited resources to evolve their applications while accessing new network services

Using Dedicated and Opportunistic Networks in Synergy for a Cost-effective Distributed Stream Processing Platform

This paper presents a case for exploiting the synergy of dedicated and opportunistic network resources in a distributed hosting platform for data stream processing applications. Our previous studies have demonstrated the benefits of combining dedicated reliable resources with opportunistic resources in case of high-throughput computing applications, where timely allocation of the processing units is the primary concern. Since distributed stream processing applications demand large volume of data transmission between the processing sites at a consistent rate, adequate control over the network resources is important here to assure a steady flow of processing. In this paper, we propose a system model for the hybrid hosting platform where stream processing servers installed at distributed sites are interconnected with a combination of dedicated links and public Internet. Decentralized algorithms have been developed for allocation of the two classes of network resources among the competing tasks with an objective towards higher task throughput and better utilization of expensive dedicated resources. Results from extensive simulation study show that with proper management, systems exploiting the synergy of dedicated and opportunistic resources yield considerably higher task throughput and thus, higher return on investment over the systems solely using expensive dedicated resources.Comment: 9 page

APPLICATION-DRIVEN OPTIMIZED SLA-AWARE PATH SELECTION FOR COLLABORATION APPLICATIONS

Currently, applications are at the mercy of a network’s infrastructure for the selection of a path within a network environment where more than one path exists between a source and a destination. Too often, the network infrastructure elements are unaware of an application’s requirements, or are aware of them in only a very rudimentary way. This situation is particularly dire for collaboration applications, which often have the most stringent requirements for path characteristics including delay, jitter, and packet loss. Techniques are presented herein that move the point of control for path selection to a collaboration application through a lightweight, in-band signaling mechanism that is exposed by the application to a network’s infrastructure for appropriated and differentiated traffic routing. Aspects of the presented techniques support the use of a per-application tunneled path for traffic flows, combined with a measurement methodology for those multiple paths and a mechanism for the application-level designation of specific and differentiated traffic pathing via an upstream router, allowing an application to measure performance across multiple paths and then signal to a network which path to choose based on per-application preference and service-level agreement (SLA) criteria

Ubiquitous Internet in an integrated satellite-terrestrial environment: The SUITED solution

yesThe current Internet architecture appears to not be particularly suited to addressing the emerging needs of new classes of users who wish to gain access to multimedia services made available by ISPs, regardless of their location, while in motion and with a guaranteed level of quality. One of the main objectives of so-called nextgeneration systems is to overcome the limitations of today¿s available Internet by adopting an approach based on the integration of different mobile and fixed networks. The SUITED project moves in this direction since it aims at contributing to the design and deployment of the global mobile broadband system (GMBS), a unique satellite/terrestrial infrastructure ensuring nomadic users access to Internet services with a negotiated QoS. A description of the main features of the GMBS architecture, characterized by the integration of a multisegment access network with a federated ISP network is given in this article. The GMBS multimode terminal is schematically described, and an overview of the so-called QoS-aware mobility management scheme, devised for such a heterogeneous scenario,is provided

WI-FI ALLIANCE HOTSPOT 2.0 SPECIFICATION BASED NETWORK DISCOVERY, SELECTION, AUTHENTICATION, DEPLOYMENT AND FUNCTIONALITY TESTS.

The demand for high mobile data transmission has been dramatically enlarged since there is a significant increase at the number of mobile communication devices that capable of providing high data rates. It is clearly observed that even the next generation cellular networks are not able to respond to this demand to provide the required level of mobile data transmission capacity. Although, WLAN responses to this demand by providing upwards of 600 Mbps data rates it is not convenient in terms of cellular like mobility and requires user intervention anytime of reconnection to a hotspot. Therefore, the need for a new technology took place and IEEE has introduced a new amendment to IEEE 802.11 standards family which is called as IEEE 802.11u. Based on IEEE 802.11u amendment, WFA developed WFA Hotspot 2.0 Specification and started to certify the Wi-Fi devices under Passpoint certification program. This new technology developed to provide Wi-Fi capable devices simply identify, select and associate to a Hotspot without any user intervention in a highly secure manner. As Hotspot 2.0 Specification is quite new in the market it has been a challenging work to reach some academic papers; however, IEEE 802.11u standard, Internet sources, white papers published by different companies/organizations and discussions with telecommunication experts have made this master thesis to achieve its goals. This thesis work provides a great resource for the network operators to have a great understanding of the Hotspot 2.0 Specification in terms of theory, network element requirements and deployment by providing a good understanding of the system functionality. In this paper, a comprehensive theoretical background that addresses to WLAN technology, Passpoint elements, and IEEE 802.11u based network discovery, selection and authentication is provided. Besides, Hotspot 2.0 network deployment scenarios with network core element requirements are designed and Passpoint functionality tests are performed under different scenarios by describing a comprehensive setup for the testing.fi=Opinnäytetyö kokotekstinä PDF-muodossa.|en=Thesis fulltext in PDF format.|sv=Lärdomsprov tillgängligt som fulltext i PDF-format

BGRP: A Tree-Based Aggregation Protocol for Inter-domain Reservations

Resource reservation needs to accommodate the rapidly growing size and increasing service diversity of the Internet. Recently, hierarchical architectures have been proposed that provide domain-level reservation.However, it is not clear that these proposals can set up and maintain reservations in an efficient and scalable fashion. In this paper, we describe a distributed architecture and protocol,called the Border Gateway Reservation Protocol (BGRP), for inter-domain resource reservation that can scale in terms of message processing load. state storage and bandwidth. Each stub or transit domain may use its own intra-domain resource reservation protocol. BGRP builds a sink tree for each of the stub domains. Each sink tree aggregates bandwidth reservations from all data sources in the network.Since backbone routers only maintain the sink tree information, the total number of reservation states at each router scales, in the worst case, linearly with the number of domains in the Internet. BGRP relies on differentiated services for data forwarding. As a result, the number of packet classifier entries is small, not the number of micro-flows.To reduce the protocol message traffic, routers may reserve domain bandwidth beyond the current load so that sources can join or leave the tree or change their reservation without having to send messages all the way to the root for every such change. We use``soft state'' to maintain reservations. In contrast to RSVP, refresh messages are delivered reliably, allowing us to reduce the refresh frequency

Reducing Internet Latency : A Survey of Techniques and their Merit

Bob Briscoe, Anna Brunstrom, Andreas Petlund, David Hayes, David Ros, Ing-Jyh Tsang, Stein Gjessing, Gorry Fairhurst, Carsten Griwodz, Michael WelzlPeer reviewedPreprin