SIP over client initiated connections

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Volume Title

Helsinki University of Technology | Diplomityö
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Date

2007

Department

Tietotekniikan osasto

Major/Subject

Tietokoneverkot

Mcode

T-110

Degree programme

Language

en

Pages

x + 44 s. + liitt. 3 s.

Series

Abstract

SIP outbound as an extension of SIP enables the client initiated connections in SIP signaling system. This feature is desirable in the case of NAT or firewall present between the public and the private side. In such situation, connections are only allowed from the private side to the public side. SIP outbound proposes a mechanism which keeps the client initiated connections between a UA and proxies and later reuses the same connections to push data to the UA from the proxy sides. This mechanism ensures the successful traversal of NAT/firewall. In this thesis we implemented SIP outbound protocol as an extension of SIP and integrated to the WeSAHMI experimental infrastructure and then evaluated the performance of the system as a whole.

Description

Supervisor

Ylä-Jääski, Antti

Thesis advisor

Tarkoma, Sasu

Keywords

SIP, SIP outbound, STUN keepalive, backoff mechanism, flow token, NAT

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Citation

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-2020120554022

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[dipl] Teknillinen korkeakoulu / TKK