Adaptive probe-based congestion-aware handover procedure using SIP protocol

  • Rok Libnik Telekom Slovenije, d.d., Cigaletova 15, 1000 Ljubljana, Slovenia
  • Ales Svigelj Jozef Stefan Instituite Jamova 39 SI-1000 Ljubljana Slovenia


Wireless technologies have evolved very rapidly in recent years. In the future, operators will need to enable users to use communication services independently of access technologies, so they will have to support seamless handovers in heterogeneous networks. In this paper we present a novel adaptive congestion aware SIP based procedure for handover in heterogeneous networks. In the proposed algorithm the handover decision is based in addition to signal strength, also on target network congestion status, which is tested during the conversation. As SIP protocol was used, the proposed procedure is independent of access technologies. For performance evaluation of proposed procedure we developed a purpose‑built simulation model. The results show that the use of the proposed adaptive procedure significantly improves the QoE of VoIP users, compared to reference scenario, in which only signal strength was used as the trigger for handover decision.

Author Biographies

Rok Libnik, Telekom Slovenije, d.d., Cigaletova 15, 1000 Ljubljana, Slovenia
Product marketing department at Telekom SlovenijeHead of Managed Services
Ales Svigelj, Jozef Stefan Instituite Jamova 39 SI-1000 Ljubljana Slovenia
Department of Communication SystemsResearch fellow


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How to Cite
LIBNIK, Rok; SVIGELJ, Ales. Adaptive probe-based congestion-aware handover procedure using SIP protocol. INTERNATIONAL JOURNAL OF COMPUTERS COMMUNICATIONS & CONTROL, [S.l.], v. 10, n. 5, p. 686-701, july 2015. ISSN 1841-9844. Available at: <>. Date accessed: 22 may 2022.


Seamless handover; SIP; Heterogeneous networks;