Data deluge has not been the only challenge of modern mobile internet usage. Always-connected applications like push email and social networking create huge levels of signalling as devices constantly poll base stations, and this resulted in some high profile ‘signalling storms’ a few years ago, creating outages for operators as well-regarded as NTT Docomo and Verizon. Data deluge has not been the only challenge of modern mobile internet usage. Always-connected applications like push email and social networking create huge levels of signalling as devices constantly poll base stations, and this resulted in some high profile ‘signalling storms’ a few years ago, creating outages for operators as well-regarded as NTT Docomo and Verizon. Now, the expansion of VoLTE has created a…