Portable and temporary mobile cells are being deployed in ever greater numbers and scenarios, to provide connectivity on demand. Referred to by two acronyms, CoW (Cells On Wheels) and NoW (Network on Wheels), the field has roots dating back to 2G, but only became a significant sector for the major equipment makers such as Huawei, Ericsson, and Nokia under 4G/LTE. Growth has accelerated further in the 5G era, as demand expands beyond the traditional sectors of venues, music events and construction sites to include emergency response to disasters such as earthquakes and wildfires, as well as playing a role in private networks where flexible connectivity is needed. CoWs are also being considered for roles in 5G densification in urban areas…