5G-Xcast is proud to announce that deliverable D3.2 on Air Interface is now released and can be downloaded from this link.
This report investigates the 3GPP Release 15 (Rel’15) of 5G New Radio (NR), and extends the air interface to point-to-multipoint (PTM) communications. Two modes are proposed in order to fulfill the different 3GPP requirements needed for broadcast and multicast. The 5G-Xcast Mixed Mode enables a dynamic and seamless switching between Point-to-Point (PTP) and PTM transmissions both in the downlink and the uplink. It reuses the NR Rel’15 air interface specification. The 5G-Xcast Terrestrial Broadcast Mode enables the reception of the service to users without uplink capabilities, i.e. being a downlink-only mode. One of its design principles is the transmission over large coverage areas in order to enable High-Power High-Tower (HPHT) network configurations. This deliverable also provides an evaluation of the 5G NR Rel’15 unicast specifications. In addition, the two 5G-Xcast PTM solutions are evaluated in order to demonstrate the more efficient use of the radio resources and their advantages over PTP for the scenarios considered in 5G-Xcast.