Jeremy is Nomad Digital's Chief Architect and has been with the company since 2014 with responsibility for the architecture of Nomad's range of innovative technological solutions for the market place.
Today’s train to ground data needs are predominantly met by cellular services, albeit with varying levels of data throughput.
Combine this with the high cost per GB of data and then the incomplete cellular coverage. Today’s LTE and LTE-A networks have predominantly been deployed and optimised by mobile operators for the distinct purpose of connecting users with smart phones. It is clear the needs of the rail environment differ from the needs of smart phone users and this is particularly evident when it comes to things such as throughput, and the direction of the link where throughput is maximised, the link being asymmetrical. Mobile networks are geared towards greater throughput on the downlink rather than on the uplink. Whilst for WiFi on-board applications that does suffice, when using cellular for uploading operational train data, such as CCTV images real time or stored, CBM data, the uplink becomes the priority.