The LTE-Broadcast Alliance was formed 18 months ago to try to inject much-needed momentum into the technology, but progress has been disappointingly slow, according to Matt Stagg, head of mobile video and content at EE, a founder member (with Telstra, KT and Verizon). “I’d expected us to have it commercially live by now,” he told Mobile Europe. The technology allows a single piece of content or data to be distributed to multiple users simultaneously by broadcast or multicast, in the same piece of spectrum, which can improve the spectral efficiency and user experience in applications like mobile TV, over-the-air updates, interactive advertising and others. The killer app was seen as the streaming of live video to huge numbers of users,…