Posted on Apr 7, 2019
Mobile Edge Computing (MEC) refers to co-location of cloud computing at the edge of mobile access network. The candidate access networks are WiFi access via Access Point (AP) and public or private 4G LTE access via eNodeB. The benefits of MEC include, ultra low latency, high bandwidth, rich user context and access to relevant network information. For example, group communications application, such as Push To Talk (PTT) can benefit from MEC. A typical PTT application is hosted on a server deep in the Cloud, which is several hops away from the mobile PTT clients running on mobile hand sets. The latency of call set up between all parties involved in group communications is aggravated by multiple hops between the clients and the server. On top of that, if the client uses standard Internet connection instead of dedicated connectivity with QoS implemented; the latency is even higher, making it a highly unreliable solution for group communications during medical emergencies, disaster situations and other mission critical field situations. Now consider that instead of deep inside the Cloud, a lite version of PTT server application is co-located with the WiFi Access Point or LTE eNodeB, at the edge of the cloud. In this case, the PTT server is only a single hop away from PTT clients, that are mobile in the area or region. This helps to reduce latency to a sub-second level, and also delivers the benefits of high bandwidth.