Network layer based redundancy for time-critical VoIP applications

Author

Sevcik, B. ; Zeilinger, H. ; Turek, T. ; Zucker, G.

Author_Institution

Inst. of Comput. Technol., Univ. of Technol., Vienna, Austria

fYear

2009

fDate

23-25 Sept. 2009

Firstpage

1

Lastpage

5

Abstract

Voice over Internet protocol (VoIP) applications are making their way into safety-critical environments. If voice data has to be transmitted in such environments, the connection must not fail and the network has to recover quickly. Additionally, the use of specialized systems that are tailored to a certain application is not a preferred solution. Instead, the use of commercial-off-the-shelf (COTS) hard- and software is required. This paper discusses the use of standardized hard- and software as well as network protocols to allow failover times within the range of milliseconds. A redundant end-system and its network coupling are presented. The Layer 3 protocol OSPF and the combination of OSPF with the protocol-independent Hello protocol BFD are investigated to fulfill the requirements. The tests and the achieved results show a significant reduction of the convergence time.

Keywords

Internet telephony; transport protocols; layer 3 protocol OSPF; network layer based redundancy; protocol-independent Hello protocol; safety-critical environment; time-critical VoIP application; voice over Internet protocol; Application software; Bandwidth; Communication switching; Hardware; IP networks; Internet telephony; Routing protocols; Switches; Telecommunication network reliability; Time factors; COTS; Communication Systems; High Availability; Network Protocols; Reliability; VoIP;

fLanguage

English

Publisher

ieee

Conference_Titel

AFRICON, 2009. AFRICON '09.

Conference_Location

Nairobi

Print_ISBN

978-1-4244-3918-8

Electronic_ISBN

978-1-4244-3919-5

Type

conf

DOI

10.1109/AFRCON.2009.5308236

Filename

5308236