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What is LTE direct and is there any functional difference between LTE and LTE direct?

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What is LTE direct and is there any functional difference between LTE and LTE direct?
posted Oct 3, 2014 by Ankur Athari

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LTE Direct is a new and innovative device-to-device technology being standardized in 3GPP-R12. By using this feature, one user can broadcast its information in 128-bit long expression and another user can read this information based on his/her interest.

It enables "always-on" discovery of thousands of devices and their services in a proximity of 500m, in a privacy sensitive and battery efficient way.

LTE Direct relies on the LTE physical layer to provide a scalable and universal framework for discovery and connection. It works seamlessly with LTE: Subframes are set aside for discovery; resources are time synced with geography.

Read more: https://ltedirect.qualcomm.com/

answer Oct 3, 2014 by Akriti
LTE Direct is also a distributed networking protocol: No cell tower is needed for communication between adjacent & peer-connected devices. It allows multi-hop communication with very little battery use as compared to WiFi Direct. LTE Direct is a mesh network & is sometimes referred to as D2D (Device-2-device). It is designed with spectral efficiency in mind & aims to reduce congestion, dead zones & battery use on compliant 4G LTE-A devices.
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