(Archived) - Wireless

Extending SDN to End Nodes Towards Heterogeneous Wireless Mobility

flaviomeneses — Thu, 22 Oct 2015 11:13:28 +0000

The connectivity capabilities of mobile wireless devices have been forever changing how networks operate, increasingly demanding resources from the network. This places a need for novel mobile network architectures and mechanisms, targeting tomorrows challenges, as envisaged by 5G networks research efforts. This paper sheds a light on an important 5G aspect, namely the interaction of the mobile node with the network for the optimization of mobility processes, defining a concept framework where Software Defined Networking (SDN) reaches the end device. In this way, SDN protocols such as OpenFlow are extended with mobility management capabilities, where the mobile terminal can provide details about perceived connectivity targets and conditions, and the controller is able to enforce necessary changes to data flows all the way to the terminal node. This framework was experimentally evaluated in a physical wireless testbed, with results showcasing its feasibility in a mobile offloading scenario.

Multiple Flow in Extended SDN Wireless Mobility

dcorujo — Mon, 17 Aug 2015 10:06:02 +0000

5G, as the next generation telecommunications architecture that aims to tackle the explosion of connected devices, services and access technologies, will heavily rely on Software Defined Mechanisms (SDN) to compose its underlying mechanisms. Notwithstanding, despite the need for novel control procedures to support and optimize increasingly challenging wireless mobile scenarios, SDN has been being deployed at the core and backhaul sections of the network and is not actively considering its impact directly over the wireless mobile terminals themselves. The challenges associated with the extension of SDN protocols, such as OpenFlow, all the way to the terminal requires the design and evaluation of frameworks that not only provide such mechanisms, but actually evaluate them and their benefits. This paper explores a framework where SDN mechanisms are extended all the way to the mobile node, in heterogeneous wireless environments featuring different mobile nodes with multiple data flows, which act both as consumers and producers of information. In this way, flow-based mobility management becomes available to the network controller entity, through the OpenFlow protocol, allowing as well the assistance of the mobile nodes in the execution of the mobility procedure. The concept framework was implemented over a physical wireless testbed, validating its contribution in a mobile source-mobility use case, with results highlighting the promising benefits of extending SDN approaches for end-to-end flow control in wireless environments.

Characterization of Unplanned Metropolitan Wireless Networks

jpbarraca — Tue, 11 Jan 2011 11:22:44 +0000

Mobile Internet penetration has grown steadily over the last few years. Although most of today’s users have access through their 3G Mobile Operators, there are still regions that are under-covered for various reasons. Wireless Mesh Networks (WMN) can play an important role by providing the means to fully cover those underserved regions.

Due to their intrinsic nature, WMN require a critical mass of nodes belonging to the mesh in order to be effective. In this paper we present a study conducted in Aveiro, Portugal which intends to draw some conclusions on the feasibility of deploying a WMN in small to medium cities based on the cooperation of its inhabitants and on off-the-shelf wireless equipment.

Managing Community Aware Wireless Mesh Networks

jpbarraca — Mon, 21 Jun 2010 15:04:48 +0000

Wireless mesh networks, due to their typical architecture and deployment, are able to respond to user expectations as no other technology allows. Its typical multi-level approach facilitates local interactions by nearby wireless nodes from multiple users. Also, adaptation to user expectations on a dynamic manner is able to of further enhancing the capacity of these networks, while increasing its ubiquity. Nevertheless, these networks have no management model. In the paper we present the foundations for a management model for community aware networking. Design challenges for community management are identified and a management framework supporting the relevant concepts, linking social aspects and technology, is described.

Role Based Cross-Layer Communities in WMN

jpbarraca — Mon, 21 Jun 2010 14:47:41 +0000

The community notion can be exploited as a rational concept leading users to cooperate in sharing resources on Wireless Mesh Networks. We propose a novel concept for self-organizing networks, where multiple entities (network elements or users) collaborate to achieve common goals, and in particular, to establish the basic connectivity and service delivery infrastructures. The resulting architecture is based on wireless mesh communications, with different entities taking different roles in the communities in a cross-layer approach. These communities can collaborate, leading to increasingly complex and geographically extended scenarios.

AMazING - Advanced Mobile wIreless Network playGround

dgomes — Fri, 18 Jun 2010 22:24:46 +0000

We describe a wireless testbed composed of 24 wireless nodes that can be used to perform a broad range of studies in the area of next generation networks. This paper addresses the difficulties and constrains faced by the authors throughout the deployment process of such testbed. Flexibility and controllability were key concerns driving the testbed design. The testbed can be remotely managed through a series of remotely accessible web services performing low level management. Validation results are presented, showing the interference levels of the testbed as well as its maximum throughput capabilities.

Community Building over Neighborhood Wireless Mesh Networks

jpbarraca — Wed, 28 Oct 2009 14:15:28 +0000

The fourth generation (4G) network paradigm has long been sought. A user-centric vision for such “always best connected” next-generation 4G networks is neighborhood Wireless Mesh Networks (WMNs). The vision for WMNs reflects the trade- off between the immediate self- interest of the user, and the user’s need for social contacts: Users would pool their resources in order to support the creation and operation of the underlying communication network (participating at all physical, access, and network layers), but also for service provision on top of it. We argue that the design of communities suitable for this environment will encourage users to participate, enable trustworthy network creation, and provide a social layer, which can be exploited in order to design cross-layer incentive mechanisms that will further encourage users to share their resources and cooperate at lower layers.

Privacy through Virtual Hording

dgomes — Sun, 24 May 2009 21:23:44 +0000

The wireless digital lifestyle comes to the expense of less privacy and security. This environment is prone to be monitored by rogue users, eager to learn from our lifestyle habits and use them for their own profit. The IP protocol provides very few mechanisms, in order to safeguard user privacy and impair efficient data-mining of user habits. This paper will address an identity architecture that makes use of both data (L2) and network (L3) layer identifiers in order to provide a pseudonimization function, based on virtual hoarding concepts. Our proposal is especially interesting when able to exploit the broadcast and promiscuous nature of wireless communications that usually is regarded as a security concern. A prototype implementation has been developed and tested.

Quasi-omniscient Networks - Scenarios on Context Capturing and New Services through Wireless Sensor Networks

dgomes — Mon, 18 May 2009 23:30:36 +0000

This paper addresses future scenarios for the telecommunications field, addressing the impact of three important research trends in computer networks: Context, Sensors and Wireless Networks. The proposed scenarios clearly highlight the possible synergies between the defined areas, and describe the role of Users and Network Operators in order to achieve the described goals. The potential danger of an over-encompassing network is identified, with a brief discussion on the challenges associated to the implementation of such a knowledge-aware communications network. The paper finalizes presenting a classification on the typical scenarios to be expected, and highlighting the associated challenges. It also presents a proposal on a scalable network infrastructure for Context processing.

IP Multicast Dynamic Mapping in Heterogeneous Environments

dgomes — Mon, 18 May 2009 17:41:13 +0000