Telecommunication Systems

, Volume 18, Issue 1–3, pp 227–242 | Cite as

Quality of Service in Mobile and Wireless Networks: The Need for Proactive and Adaptive Applications

  • Marc Bechler
  • Hartmut Ritter
  • Jochen H. Schiller


Although there are already many fixed networked computers around the world, we will see several orders of magnitude more wireless and mobile devices connected to the Internet. Each car, truck, aircraft, but also many people will carry a plethora of different devices for communication. However, all mobile and wireless systems have in common that the quality of their connectivity may change rapidly over time. Still, users want to get the best quality possible or the quality they pay for respectively. In this paper we describe the implementation of adaptive and proactive applications that are supported by our architecture. The user can express his or her preference by simply clicking on a Q(uality)-button; the process of adaptation is performed without any user interaction. Feedback loops connecting applications, operating system, and network system realize the adaptation. We show how our architecture supports traditional adaptive applications and demonstrate the benefits of proactive applications in wireless and mobile environments.

mobile computing wireless networks quality of service adaptive end systems operating system 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    A. Bakre and B. Badrinath, I-TCP, Indirect TCP for mobile hosts, in: Proc. of the 15th Internat. Conf. on Distributed Computing Systems (ICDCS), Vancouver, 1995.Google Scholar
  2. [2]
    M. Bechler, H. Ritter and J. Schiller, Integration of a traffic conditioner for differentiated services in end-systems via feedback-loops, in: Broadband Communications '99 (BC'99), Hong Kong, China, 1999.Google Scholar
  3. [3]
    S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang and W. Weiss, An architecture for differentiated services, RFC 2475 (December 1998).Google Scholar
  4. [4]
    Bluetooth Consortium (1999); Scholar
  5. [5]
    E.A. Brewer, R.H. Katz, Y. Chawathe, S.D. Gribble, T. Hodes, G. Nguyen, M. Stemm, T. Henderson, E. Amit, H. Balakrishnan, A. Fox, V. Padmanabhan and S. Seshan, A network architecture for heterogeneous mobile computing, IEEE Personal Communications 5(5) (1998).Google Scholar
  6. [6]
    K. Brown and S. Singh, M-TCP, TCP for mobile cellular networks, Computer Communications Review 27(5) (1997).Google Scholar
  7. [7]
    ETSI, Standards for DAB, DECT, GSM, and UTMS, European Telecommunications Standards Institute (1999); Scholar
  8. [8]
    Infrared Data Association (1999); Scholar
  9. [9]
    Lakshman, AQUA: An adaptive quality of service architecture for distributed multimedia applications, Dissertation, University of Kentucky (1997).Google Scholar
  10. [10]
    B. Li, Adaptive behaviour of quality of service in distributed multimedia systems, Dissertation, University of Illinois (1997).Google Scholar
  11. [11]
    Lucent, WaveLAN II, Lucent Corporation (1999); Scholar
  12. [12]
    K. Nichols, S. Blake, F. Baker and D. Black, Definition of the differentiated services field (DS field) in the IPv4 and IPv6 Headers, RFC 2474 (December 1998).Google Scholar
  13. [13]
    C. Perkins, IP mobility support, RFC 2002 (October 1996).Google Scholar
  14. [14]
    A. Richards, G. Rogers, M. Antoniades and V. Witana, Mapping user level QoS from a single parameter, in: Proc. of the 2nd Internat. Conf. on Multimedia Networks and Services (MMNS'98) (November 1998).Google Scholar
  15. [15]
    T. Roscoe, The structure of a multi-service operating system, Dissertation, Queen's College, University of Cambridge (April 1995).Google Scholar
  16. [16]
    J. Schiller, Feedback controlled scheduling for QoS in communication systems, in: IFIP Conf. on High Performance Networking (HPN'98), Vienna, Austria, 1998.Google Scholar
  17. [17]
    J. Schiller and P. Gunningberg, Feasibility of a software-based ATM cell-level scheduler with advanced shaping, in: Broadband Communications '98 (BC'98), Stuttgart, Germany, 1998.Google Scholar
  18. [18]
    UNIQuE, Universal Network Infrastructure with Quality of service Enhancements (1999); Scholar
  19. [19]
    Wireless Application Protocol Forum (1999); Scholar
  20. [20]
    X. Zhao, C. Castelluccia and M. Baker, Flexible network support for mobility, in: Proc. ACM/IEEE MobiCom'98, 1998.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Marc Bechler
    • 1
  • Hartmut Ritter
    • 1
  • Jochen H. Schiller
    • 1
  1. 1.Institute of Telematics, University of Karlsruhe

Personalised recommendations