Japanese operator NTT DoCoMo is demanding help from Google to help reign in what it's calling a signaling storm specifically exacerbated by an Android VoIP application that caused a major outage in its network.

The operator said the app and the way Android constantly polls the network generate massive signaling traffic.

Verizon Wireless suffered outages in its LTE network last year and cited similar factors.

Operators are increasingly concerned with the booming traffic demands that also are likely to accompany cloud-based services and applications like videoconferencing.

DoCoMo's outage earlier this month was the fifth outage in the past six months. It affected 2.5 million subscribers.