Archive for March, 2010

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OpenEPC – Open Evolved Packet Core

March 25, 2010

OpenEPC is a prototype implementation of the 3GPP Release 8 Evolved Packet Core (EPC) that will allow academic and industrial researchers and engineers around the world to obtain a practical look and feel of the capabilities of the Evolved Packet Core.

The software is not yet available. It was demonstrated during the 5th International FOKUS IMS Workshop on November 11-12, 2009, Berlin, Germany. The actual roadmap is available here.

OpenEPC can be integrated with various access network technologies and different application domains and thus provides an excellent foundation for own research activities and/or the establishment of Next Generation Mobile Network testbeds like the Fraunhofer FOKUS FUSECO Playground for FUture SEamless COmmunication.

The goal of the FUSECO Playground is to cover the entire technology spectrum of a Next Generation Mobile Network – from end devices across various access & core networks up to an open set of application platforms, supporting data, multimedia streaming and even mobile cloud applications.

Note that although this testbed is initially provided in the vibrant city of Berlin, the FUSECO Playground concept is “portable” and we envisage also to integrate other access networks and applications platforms from around the world. In particular, the OpenEPC toolkit is designed to enable local and highly customized FUSECO Playground instantiations around the globe at various organizations.

An Open Technology and Applications Testbed for Future Seamless Communication (FUSECO)

Paving the way for early prototyping of Future Internet technologies and applications

The Future Seamless Communication (FUSECO) Playground – located in Berlin – is a pioneering reference testbed, integrating various state of the art wireless broadband networks into a 3GPP Evolved Packet Core (EPC) reference platform, allowing the rapid validation of new networking paradigms, and prototyping of innovative Future Internet and smart city applications.

The current focus of standardization within the Third Generation Partnership Project (3GPP) is on building the foundation for future Telco networks to support coming wireless broadband access network types like Long Term Evolution (LTE) or WiMAX and concepts such as ABC (Always Best Connected), inter-technology handovers or (mobile) cloud computing. With the initial launch of Next Generation Mobile Networks of the NGMN Alliance based on the LTE/SAE (System Architecture Evolution) standard which was announced by many operators for 2010, the mobile industry demonstrates its efforts to move a true mobile broadband user experience from promise to reality. With this introduction, technology challenges have to be overcome and the focus of the industry is shifting to the key milestones such as testing and prototyping for deployment and operations, and to the availability of new services and devices.

Just like Next Generation Networks, also a Next Generation Mobile Network is quite complex in its setup and requires profound expertise. In order to enable end-to-end testing in many cases also massive investments for hard- and software and end devices and for gaining access to access networks and applications are required.

Thus inspired by the global success of the Open IMS Playground, the (Berlin) FUSECO Playground, which is coordinated by the Fraunhofer Institute FOKUS in close cooperation with the Chair for Next Generation Networks (AV) of Technische Universität (TU) Berlin, represents a pioneering testbed infrastructure, integrating in one single place different state of the art Next Generation Mobile Network technologies from different local research institutions, such as the

OpenEPC_access_HHI_BOWL
The FUSECO Playground concept
  • OpenEPC, a prototype implementation of the 3GPP Release 8 Evolved Packet Core  from Fraunhofer FOKUS and TU Berlin AV, that will allow academic and industrial researchers and engineers around the world to obtain a practical look and feel of the powerful control capabilities of the Evolved Packet Core.
  • Berlin LTE-Advanced Testbed of the Fraunhofer Heinrich Hertz Institute which serves for the early evaluation of LTE-advanced concepts in a realistic cellular environment and for the demonstration of key technology features to increase spectral efficiency, range, throughput and quality-of-service. The testbed is operated from three sites located at Fraunhofer Heinrich Hertz Institute (HHI), Deutsche Telekom Laboratories and TU Berlin.
  • Berlin Open Wireless Lab (BOWL) of the Deutsche Telekom Laboratories at TU Berlin which provides an open research platform for the wireless networking community. The BOWL project maintains a reconfigurable wireless outdoor testbed with 50 nodes. The network can be configured to serve as both an infrastructure or a mesh network.

The goal of the FUSECO Playground is to cover the entire technology spectrum of a Next Generation Mobile Network – from end devices across various access & core networks up to an open set of application platforms, supporting data, multimedia streaming and even mobile cloud applications.

Note that although this testbed offer is initially provided in the vibrant city of Berlin, the FUSECO Playground concept is “portable” and we envisage also to integrate other access networks and applications platforms from around the world. In particular, the OpenEPC toolkit is designed to enable local and highly customized FUSECO Playground instantiations around the globe at various organizations.

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From NGN (Next Generation Network) towards NGMN (Next Generation Mobile Network) – Understanding the relationship between 3GPP IMS and 3GPP Evolved Packet Core (EPC).

March 16, 2010

Talk by: Professor Dr. Thomas Magedanz. (Head of Competence Center Next Generation Network Infrastructure at Frounhofer FOKUS.

Date: 11 March , 2010.

Time : 8.30 a.m  to 1.00 pm.

Venue: Auditorium 2nd Floor , MIMOS Berhad , Technology Park Malaysia.

This half-day workshop provides an overview of Next Generation Mobile Network (NGMN) as
defined by the NGMN Alliance (www.ngmn.org) and the corresponding 3GPP standards related to the Long term Evolution (LTE) and in particular the Evolved Packet Core (EPC). In addition, the workshop also address the potential EPC application domains, namely the IP Multimedia Subsystem (IMS) as well as potential open internet service architectures. The tutorial terminates with an introduction to the TU Berlin / Fraunhofer FOKUS OpenEPC (www.openepc.net) software toolkit enabling rapid NGMN prototyping for applied academic and industry research.

Speaker’s Bio:

Thomas Magedanz (PhD) is professor in the electrical engineering and computer sciences faculty at the Technische Universität Berlin, Germany. In addition, he is director of the “Next Generation Network Infrastructure” division of the Fraunhofer institute FOKUS, which provides various testbeds and tools in the context of converging networks and open service delivery platforms. For more than 20 years Prof. Magedanz has been working in the convergence field of fixed and mobile telecommunications, the Internet and information technologies. In the course of his research activities he published more than 200 technical papers/articles. In addition, Prof Magedanz is senior member of the IEEE, and editorial board member of several journals. In 2007, Prof. Magedanz joined the European FIRE (Future Internet Research and Experimental Facilities) Expert Group.

Refetrence : http://www.ngmn.org

http://www.openepc.net

http://www.fokus.fraunhofer.de/en/fokus/index.html

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An Introduction to SCTP…..

March 15, 2010

The Stream Control Transmission Protocol (SCTP) is an IP transport protocol. It resides at an equivalent level with TCP , and provides a reliable transport service , ensuring that data is transported across the network without error, and in sequence. It is designed to transport Public Switched Telephone Network (PSTN) signalling messages over IP networks, but is capable of broader applications.

SCTP employs a session-oriented mechanism (similar to TCP) for transmission of data. A relationship is established between the endpoints of SCTP associations prior to data transfer , and this relationship is maintained untill all data transmission has been successfully completed.

There are many good features in SCTP , the most important ones are:-

1. Multi-stream capability.

2. A broader concept for connecting endpoints ( similar to , and more useful than , TCP connection) known as ‘association’.

3. Multi-hoaming support.

4. Path and peer failure detection.

Multi Hoaming.

When a peer is multi-homed , one of the IP addresses is selected as the ‘primary destination address’. All data will be destined to this IP, by default. When a failure of a primary address is detected , the sender selects an alternate primary address until the link is restored or the user initiates a change in the primary address.

Assoc shutdown.

Even in shutdown procedures , SCTP has some significant advantages over TCP. For instance , SCTP implements a graceful close of an association by exchanging three messages. These messages acknowledge that both endpoints will cease in their transmissions of data. This allows no room for  ‘half open’ connections ( In TCP , a ‘half open’ connections happens when one endpoint that continues to send data though the peer endpoint is no longer transmitting data).

Reference:

http://www.sctp.org

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IPCop Firewall….firewall for SMEs….

March 1, 2010

A typical firewall consist of combination of hardware and software in the form of an appliance. Firewalls are widely used in the enterprise segments to enforce security policies and access controls. Although the SME segment values the utility of firewalls , its cost is a major detterent to implementation. This brings us to a firewall for SMEs – IPCop.

On the web , IPCop was praised as stable , easy to configure and flexible , and it was possible to install it on an old PC with a minimum of two Ethernet cards. Three add – ons of IPCop are :-

1. Advanced proxy + URL Filter for filtering unwanted websites.

2. Zerina for Open VPN support.

3. Block Outgoing Traffic ( BOT ) was installed for controlling port – wise Internet access.

In conclusion , IPCop is a stable , flexible , features-rich and very reliable firewall. Basic installation and configuration is straightforward. However , its implementation requires in-depth technical knowledge.

Reference:-

http://www.ipcop.org