Metaswitch, ZTE in VoLTE interoperability test

Staff writer
07 Nov 2011

Metaswitch Networksand ZTE said in separate announcements that they successfully participated in a VoLTE interoperability event.

Hosted by the MultiService Forum, and backed by GSM Association, the MSF VoLTE Interoperability Test Event 2011 event was jointly hosted by Vodafone at their Düsseldorf Test and Innovation Centre, and by China Mobile at their Research Institute Laboratory in Beijing.

The test event centered on validating key network interfaces to ensure multi-vendor deployment strategies for LTE/EPC/IMS technologies, including GSMA’s technical recommendations for IMS-based VoLTE. Test scenarios included VoLTE basic interoperability, global roaming and interconnection as specified by the GSMA.

Metaswitch’s Perimeta session border controller (SBC) was included in the test event. The Perimeta SBC functioned as a P-CSCF in both local and roaming scenarios, involving a number of vendors’ PCRF, I-CSCF, S-CSCF, diameter routing agent and User Equipment implementations.

Exposing Gm, Mw, Izi and Ici interfaces, Perimeta enabled calls between the Düsseldorf and Beijing testing sites during the IOT event. The Perimeta SBC also operated simultaneously as a P-CSCF and combined IBCF/TrGW for international roaming calls, thereby meeting a critical interop objective.

Meanwhile, ZTE said it provided its end-to-end system and terminals for the test, including: IMS Core (P/I/S-CSCF), eNodeB, MME, S-GW, P-GW, PCRF, HSS, DRA, IMS MMTel AS, IMS soft client and LTE UEs.

During the test, VoLTE calls were successfully completed at and between two host sites (including MMTel services). LTE roaming between host sites also was demonstrated successfully through the use of dynamic policy control between home and visited networks that employed Diameter Routing Agents (DRA).

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