As everyone knows, a EN-DC configuration is defined as a 5G Non-standalone (5G NSA) architecture. An EN-DC configuration relies on the 4G Evolved Packet Core (EPC) and an anchor 4G eNB base station that acts as the master node. https://www.rcrwireless.com/20190908/analyst-angle/road-to-standalone-5g-analyst-angle …
"All of today's 5G networks are based on the NSA version of 5G because the 'standalone' version of 5G hasn't yet been finalized by the 3GPP. Standalone 5G is expected to be approved in March 2020, when the 3GPP finishes work on 'Release 16.'" https://www.lightreading.com/mobile/5g/nokia-ericsson-cisco-pull-us-operators-toward-standalone-5g-/d/d-id/753414 …
AT&T's sub-6GHz deployments sets the stage for migration to standalone 5G (a 5G core network, rather than the existing 4G core network) through the use of a technology called 'dynamic spectrum sharing', which allows radios to host both 4G and 5G traffic. https://www.google.com/amp/s/www.mobileworldlive.com/featured-content/home-banner/att-defends-5g-rollout-pace-as-it-preps-for-sa/amp/ …
"Dynamic spectrum sharing (DSS), which will allow mobile operators to deploy LTE and 5G NR in the same band at the same time through a software update." https://www.rcrwireless.com/20190819/5g/dss-spectrum-5g-ericsson … The technology behind 5G is extraordinary in many ways. Making everything work together isn't simple.
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