Optimization of Communication Protocols by stochastic Delay Mechanisms

The paper is concerned with developing stochastic delay mechanisms for efficient multicast protocols and for smooth mobile handover processes which are capable of preserving a given Quality of Service (QoS). In both applications the participating entities (receiver nodes or subscribers) sample a stochastic timer and generate load after a random delay. In this way, the load on the networking resources is evenly distributed which helps to maintain QoS communication. The optimal timer distributions have been sought in different p.d.f. families (e.g. exponential, power law and radial basis function) and the optimal parameter have been found in a recursive manner. Detailed simulations have demonstrated the improvement in performance both in the case of multicast and mobile handover applications.

• J. Levendovszky
• I. Koncz
• P. Boros

• Multicast communication
• stochactic delay mechanisms.

[1] L. Kleinrock, "Queueing Systems Vol. I.: Theory"
[2] D. Johnson, C. Perkins, J. Arkko, "Mobility Support in IPv6", draft-ietfmobileip-
ipv6-24.txt
[3] H. Soliman, C. Castelluccia, K. El-Malki, L. Bellier, "Hierarchical Mobile
IPv6 mobility management (HMIPv6)", draft-ietf-mobileip-hmipv6-
08.txt
[4] IST-1999-10050 BRAIN project, "BRAIN architecture specifications and
models, BRAIN functionality and protocol specification D2.2", www.istbrain.
org
[5] J. Nonmacher, E.W. Biersack, Scalable Feedback for Large Groups,
IEEE/ACM Trans. Networking, vol. 7., pp 375-386, June 1999.
[6] P. Sharma, D. Estrin, S. Floyd, and V. Jacobson, Scalable timers for soft
state protocols , presented at INFOCOM , Kobe, Japan.
[7] Levendovszky J., David, T., van der Meulen, E.C., Stochastic feedback
mechanisms in multicast communications, 23th Symposium on Information
and Communication Theory in the Benelux, Lovain-la-Neuve, the
Netherlands, May, 2002.