Validation of H-P2PSIP, a scalable solution for interoperability among different overlay networks

Abstract

This paper reports the results of experiments from an implementation of H-P2PSIP, a hierarchical overlay architecture based on the ongoing work in the IETF P2PSIP Working Group. This architecture allows the exchange of information among different independent overlay networks through the use of a two-layer architecture based on super-peers and hier-archical identifiers. The validation of this proposal is based on a Linux based real implementation where we have used four different scenarios with 1,000 peers in order to perform different experiments. We have obtained results for different parameters such as rout-ing performance (number of hops), delay, routing state (number of overlay routing entries) and bandwidth consumption.

Networking of multi‐domain unified communications systems: Structure design and performance evaluation

“…In the three‐level P2P‐SIP of Ferng et al, the mean lookup hop count is about 6 in case of 16 million users with the Chord DHT algorithm. The two‐level H‐P2PSIP in the work of Martinez‐Yelmo et al is able to save more than 20% of the hops needed to reach a destination with respect to a flat structure. Both these two papers quantitatively analyzed the signaling traffic bandwidth; however, Ferng et al and Martinez‐Yelmo et al did not analyze the media traffic bandwidths between domains.…”

“…The two‐level H‐P2PSIP in the work of Martinez‐Yelmo et al is able to save more than 20% of the hops needed to reach a destination with respect to a flat structure. Both these two papers quantitatively analyzed the signaling traffic bandwidth; however, Ferng et al and Martinez‐Yelmo et al did not analyze the media traffic bandwidths between domains. Li et al designed a locality‐aware P2P‐SIP system with O(logN) query hops, but the multi‐domain SIP system implied in it was only with a two‐tier structure, and more tiers were not considered .…”

“…When a crossing domain call arrives, information query among multiple DNS servers happens, and the response delay may be large. To reduce the query delay and improve efficiency, the P2P technology has been proposed to be used in the SIP system –…”

“…To reduce the query delay and improve efficiency, the P2P technology has been proposed to be used in the SIP system. [11][12][13][14][15][16][17] Furthermore, the transmission reliability of multi-domain UC systems can also be enhanced by P2P overlay. Media streams can be dynamically routed in WAN based on the average delays of paths between UC nodes.…”