Dutch telco KPN has revealed results from VoLTE (Voice over LTE) and ViLTE (Video over LTE) trials, suggesting high growth in signalling traffic when VoLTE is rolled out.
The news comes via Telecoms.com, which quoted KPN voice and mobile signalling architect Wendy Ooms stating: “On various interfaces you’ll be seeing at least a two-fold growth in signalling traffic, because of VoLTE, and its need to have multiple bearers of voice and video per call. All of this traffic will be doubled again on the Diameter Routing Agent.”
Ooms continued: “We ran a pilot with 100 participants, both international and external customers, who received a VoLTE-ready phone, to trial VoLTE on our live network, which covers 98.2% of population.”
Telecoms.com quoted Ooms warning that: “SIP signalling can have a massive effect of the load on the mobile network if you’re not doing it right.
“During our trial, someone changed the IMS registration time from 50 minutes to 5 minutes, and the load generated absolutely exploded. SIP registration storms can occur on mobile when users lose their connection, and multiple users come flooding back when the service becomes available again. Wifi could be a solution to integrate with VoLTE if one user is somewhere 4G doesn’t reach.”
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Telecoms.com also quoted LTE World Summit 2015 speakers advising simplification of LTE networks by operators, and listed Pieter Veenstra of NetNumber stating: “Complexity is your enemy. We’re looking at a paradigm shift towards a centralised signalling and routing model, where applications can be added on request.
“Operators need to radically simplify the network core, and that’s what we’re working on. It’s not just in the network itself, it’s also in the OSS and BSS. When different functions are in different parts of the network and data centres; and when they’re combined into one platform, the OSS and BSS needs to be simplified because of the orchestration process.
“We’re looking at all of this, NFV included, to help manage VoLTE as well as the Internet of Things and M2M. Additional authentication elements are required to expand services to non-LTE accesses to support VoWi, M2M and IoT.”