Conference Program

The final program for presentation of IPTComm technical papers will be published at the IIT Real-Time Communications Conference website here. Here is the list of papers accepted for presentation at IPTComm 2013. The conference proceedings are available here from the ACM Digital Library

An IMS testbed for SIP applications

The paper presents the design and implementation of an emulation platform for the IP Multimedia Subsystem. The SIP Servlet API v1.1 has been used to implement the final system. The purpose of the emulation is to offer to IMS service developers an environment where they can deploy and test their SIP applications. The emulation platform offers the possibility of configuring network triggers (e.g. initial Filter Criteria and Service Point Triggers) through a web interface, and executing complex test scenarios according to the configuration.

Authors: Cosmin Caba (Technical University of Denmark, Denmark); Jose Soler (Technical University of Denmark, Denmark)

Classification of Log Files with Limited Labeled Data

We address the problem of anomaly detection in log files that consist of a huge number of records. In order to achieve this task, we demonstrate label propagation as a semi-supervised learning technique. The strength of this approach lies in the small amount of labelled data that is further used to label the remaining data. This is an advantage since labelled data needs human expertise which comes at hight costs and becomes infeasible for big datasets. Even though our approach is general applicable, we focus on the detection of anomalous records in firewall log files. This requires a separation of records into windows which are compared with different distance functions to determine the similarity. Afterwards, we apply label propagation in order to label a complete dataset with only a limited number of iterations. We demonstrate our approach on a realistic dataset from an ISP.

Authors: Stefan Hommes (University of Luxembourg, Luxemburg); Radu State (University of Luxembourg, Luxemburg); Thomas Engel (University of Luxemburg, Luxemburg)

Unified Heterogeneous Networking Design

The Internet was designed under the assumption that end-hosts are considered stationary. Current mobile devices have multiple network interfaces, such as, Wi-Fi, LTE, WiMAX, and possibly Ethernet. Such diverse network connectivity can be used to increase both reliability and performance by running applications over multiple links sequentially, for a seamless user experience, or in parallel, for bandwidth and performance enhancements. Users are also consuming Internet services from multiple locations and devices, such as, smartphones, tablets, laptops, game consoles, and IP-enabled TVs. The existing networking stack, however, offers almost no support for intelligently exploiting such network, location and device diversity. A unified networking architecture is proposed, which makes optimal use of a heterogeneous dynamic environment, both in terms of networks and user devices. The system core functionalities include multi-homing, mobility, multipath, and disruption tolerance. The system enables mobile nodes to make decisions about how and when to use each or a combination of networks, in a secure manner. With this new architecture, we envision a shift from current applications supporting a single network, location, and device at a time, to applications that can support multiple networks, multiple locations, and multiple devices.

Authors: Amandeep Singh (Columbia University, USA); Yan Zou (Columbia University, USA); Peter Thermos (Columbia University, USA); Sateesh Addepalli (Cisco Systems, USA); Gaston Ormazabal (Columbia University, USA); Henning Schulzrinne (Columbia University, USA)

Bringing VoIP Signatures to Mobile Devices

With the advent of LTE another technology is gaining momentum in mobile communication, viz. Voice-over-IP (VoIP). While LTE provides state-of-the-art security features such as confidentiality, integrity, and authenticity, non-repudiation of voice communication over LTE is not addressed. At the same time the utilization of mobile phone devices for business communication is already common practice. However, applications supporting specific business requirements, such as the confirmability of statements made in a phone call, are missing. VoIP Signatures is a recognized concept to achieve non-repudiation for VoIP calls as well as integrity protection against the manipulation of recorded conversations. We present the integration of this concept with a VoIP client running on a mobile device. The implementation concept has been optimized for applicability on standard smartphones with regard to given characteristics such as processing power limitations. The implementation concept is introduced and the performance has been evaluated, resulting in a promising statement regarding the applicability of our approach on future mobile devices providing Voice-over-LTE functionality.

Authors: Ronald Marx (Fraunhofer SIT, Germany); Nicolai Kuntze (Fraunhofer SIT, Germany); Hagen Lauer (Technische Hochschule Mittelhessen, Germany)

Identifying abnormal pattern in cellular communication flows

Analysing communication flows on the network can help improving the overall quality provided by it to its users and allows the operators to detect abnormal pattern and react accordingly. In this paper we consider the analysis of large scale volumes of cellular communications. We propose a method that detects abnormal communications events over call data records volumes, comprising a country level data set. We detect patterns by calculating a weighted average using a sliding window with a fixed period and correlate the results with actual events happening at that instance of time. We are able to successfully detect several events using a data set provided by a mobile phone operator and present some future usage of the outcome such as real time pattern detection and possible visualisation for mobile phone operators.

Authors: David Goergen (University of Luxembourg, Luxemburg); Veena B. Mendiratta (Bell Labs, Alcatel-Lucent, USA); Radu State (University of Luxembourg, Luxemburg); Thomas Engel (University of Luxemburg, Luxemburg)

An open-source platform for converged services

Following a telecommunications industry-wide move to provide converged services that integrate solutions from both the Web and the telephony domains, we look in to the challenges in providing adequate environments that foster the creation of these types of services. The challenge in aligning these different service paradigms is that they differ in the way they deal with composition, state management, flow control, and more. Attempts at integrating these different paradigms must do so in a way that encourages the production of high quality code that does not get lost in managing the heterogeneous nature of the underlying resources. We present our experience with the Moteli engine, an open source project that directly addresses these issues.

Authors: Jonathan Michaux (LTCI Laboratory, Télécom ParisTech, France)

IPTComm 2013

Principles, Systems and Applications of IP Telecommunications