Various big names not so familiar in the cellular industry are starting to make their presence felt as 5G gets rolling, determined to seize a major stake in what they see as a field now well suited to their products and technology. They even threaten the incumbent players, or at least would like to, as Oracle made clear recently in stating it planned to challenge the dominance of the mobile core by the big three – Ericsson, Huawei and Nokia – which account for around 80% of that sector between them. Some also want to go beyond the core and deliver operators their whole 5G infrastructures via cloud-based SaaS (software-as-a-service) models. This comes at time of major disruption anyway in…