L. Budzisz

Publications (2)0 Total impact

• Source

  Available from: Nemanja Vucevic

  Conference Proceeding: Evaluation of Perceived QoS with Multimedia Applications in a Heterogeneous Wireless Network

  N. Vucevic, F. Bernardo, A. Umbert, L. Budzisz
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  ABSTRACT: This paper presents a study addressed to evaluate the variation in perceived QoS experienced by a user running multimedia applications in a heterogeneous wireless network. To perform this evaluation, a real-time testbed emulating an all-IP B3G network that includes UMTS Terrestrial Radio Access Network (UTRAN), GSM/EDGE Radio Access Network (GERAN), and Wireless Local Area Network (WLAN); and the corresponding common core network (CN) based on DiffServ technology and Multiprotocol Label Switching (MPLS) has been used. Results for videostreaming and video conference applications when running under interruptions due to a vertical handover (VHO) are included in this paper, pointing out the variations in behaviour of different applications.
  Wireless Communication Systems, 2007. ISWCS 2007. 4th International Symposium on; 11/2007
• Source

  Available from: Nemanja Vucevic

  Conference Proceeding: An all-IP heterogeneous wireless testbed for RAT selection and e2e QoS evaluation

  A. Umbert, L. Budzisz, N. Vucevic, F. Bernardo
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  ABSTRACT: In this paper, we present an all-IP heterogeneous wireless testbed for radio access technologies (RAT) selection and end-to-end (e2e) quality of service (QoS) evaluation. Presented testbed includes three different radio access networks (RANs): UTRAN, GERAN, and WLAN; and the core network (CN) based on DiffServ technology and multiprotocol label switching (MPLS). As an example two RAT selection algorithms implemented in the testbed, network-controlled cell-breathing (NCCB) and fittingness factor are described and analyzed in more details. The paper provides also simple case study that validates and compares both mentioned algorithms in a basic heterogeneous environment using the presented testbed.
  Next Generation Mobile Applications, Services and Technologies, 2007. NGMAST '07. The 2007 International Conference on; 10/2007