DSS (Dynamic Spectrum Sharing) or in Ericsson term ESS (Ericsson Spectrum Sharing) is a system where 4G and 5G share the same frequency band dynamically according to the demand of each technology. This can be done since technically, in very simple terms, 5G is an advanced version of 4G. In this project, I was responsible for the Transport Design and the Transport definitions with Claro for the event. For this 5G trial, three important physical requirements needed to be defined.

• Interfaces: > 2 x 10Gbit
• Synchronization: Time and Phase
• Bandwith: > 1 Gbit/s

Since it was only one New Radio node involved, there was no problem to upgrade two existing 1Gbit/s interfaces on the router for one 10Gbit/s S1 interface and one 10Gbit/s interface for the NG interface. These two interfaces needed to be defined since the routing between 4G and 5G was at this release made in the site router. Fortunately, the site where the test was made had available GPS ports and therefore the Time and Phase synchronization requirements were easy to solve. For synchronization redundancy, it was defined two PTP 1588v2 sources in case of a GPS failure. This trial and test were very successful and are now used as a reference to implement the DSS at the Claro network during 2020 and 2021.

Futurecom is an event in Brazil where Telco Operators and Providers come together to show new technologies and solutions. In this event, Claro and Ericsson gave a demonstration of a 5G system. In this project, I was responsible for the Transport Design and de Transport definitions with Claro for the event. For this 5G test, three important physical requirements needed to be defined.

• Interfaces: > 1x 10Gbit
• Synchronization: Time and Phase
• Bandwith: > 1 Gbit/s

Since it was only one New Radio node was involved, there was no problem to implements a 10Gbit/s interface for the NG interface on the existing router. Even though it was a little bit tricky to get the GPS signal to the New Node, we succeeded to get the Time and Phase synchronization requirements were solved. For synchronization backup, it was defined two PTP 1588v2 sources in case of a GPS failure. The event was successful and a lot of people were curious the see what 5G can do as you can see in the youtube video there was even a rock band played through the 5G system.

The idea was to make a Hologram Stream of one violinist playing Led Zeppelin from another place during a show "Led Zeppelin in Concert" at the Allianz Park Stadium. In this project, I was responsible for the Transport Design and de Transport definitions with Claro for the event. For this 5G test, four important physical requirements needed to be defined and solved.

• Interfaces: > ~12 x 10Gbit
• Synchronization: Time and Phase
• Bandwith: > 1 Gbit/s
• Latency E5: > ~5ms/s

Since it was several New Radio nodes were involved, there was a challenge to have to get the amount 10Gbit interfaces for the router. Another challenge was synchronization. Unfortunately there it was not possible to get the GPS signal to the site room that was placed deep down in their stadium. Therefore the only way to get the synchronization was via a PTP 1588v2 with high reliability. We found out that the routing of these packages has to be confirmed since a PTP 1588v2 packed cannot travel with too many hops to not losing time and phase accuracy. For redundancy, it was defined two different PTP 1588v2 sources. The last requirement was to ensure that the latency for hologram transmission was achieved. This live event was very successful and as you can see in the youtube video.

The idea was to make an Elastic Radio Access Network (ERAN) which is to coordinate the 4G radio resources from different nodes in Maracanã Stadium during the "Copa das Americas" championship. In simple words, this is done by "interconnecting" radios from different new radio nodes via the E5 interface to form a unique radio cluster. In this project, I was responsible for the Transport Design and de Transport definitions with Claro for trial. For this RAN test four important physical requirements needed to be defined and solved.

• Interfaces: > 4 x 3 x 10Gbit
• Synchronization: Time and Phase
• Bandwith: > 1 Gbit/s
• Latency: > 45 μs

Since it was several New Radio nodes were involved, there was a challenge to get the amount 10Gbit interfaces for the site router. For ERAN each node required three interfaces. One 10Gbit/s interface for the S1 and two 10Gbit/s interfaces for the E5 which is the interface to interconnects the eNodeBs. Since we had 4 New Radio nodes at the stadium we needed 12 10Gbit interfaces for the router. Another challenge was synchronization. Unfortunately there it was not possible to get the GPS signal to the site room that was unreachable for a GPS installation. Therefore the only way to get the synchronization was via a PTP 1588v2 time and phase with high reliability. For redundancy, it was defined two different PTP 1588v2 sources. The last requirement was to ensure that the maximum latency of 45 μs for the E5 interface. Therefore, there it was not possible to do any routing of E5. Every E5 connection had to be made via low latency switching. The ERAN worked fine during the championship.