10
The mmWave coverage can also be extended with the use of high-power CPE. The higher transmit power of the UE (CPE) will extend the UL coverage, thus helping reduce or eliminate the DL-UL imbalance to certain extend. OEMs are also making use of random-access preamble format which is favorable for long distance scenario as defined in 3GPP R15 and by developing the necessary algorithm in the radio system.
IAB and Smart Repeater Solutions
There are some techniques and features which are in development phase to ease the mmWave network deployment and extending the coverage. IAB and smart repeaters come as techniques and will be offered as unique proposition for mmWave solutions for variety of deployments. Both solutions currently, are not part of our planning exercise but as we go further, both solutions need to be considered while network planning. Integrated Access backhaul (IAB) – 3GPP has defined new topology for IAB where a RAN node integrates wireless backhaul connection as well as providing connectivity to UEs. This topology will helps extending mmWave deployments in indoor and outdoor locations with reducing capital cost of infrastructure, speeding up the deployment and lower the requirement of fiber at every gNodeB location. Smart Repeaters – 3GPP is defining network-controlled RF repeater with adaptive beamforming, which could greatly extend the coverage. This technology can be used to amplify a 5G mmWave signal and then transmit the boosted signal in the required direction. Smart repeaters can be installed easily on streetlights, lampposts, walls, and windows, reducing the high cost of a truck roll, complex zoning and trenching that are typically required for fiber connections.
Figure 9: IAB & Smart repeaters
Powered by FlippingBook