General features of the private 5G SA bubble
The solution in question is of the “tactical” type, that is contained within a box with military-type robustness characteristics, capable of being used at any point within the concession areas. The main components have an IP (International Protecion) 65 protection level, so that they can also be used in operational scenarios.
The 5G Core Network component is aligned with the 3GPP specifications contained in Release 15, the first 3GPP release containing the 5G specifications, with Stand Alone architecture, i.e. all network functions are provided independently by the structure, without any use of the previous network infrastructures. generation, 4G / LTE, for the management of the control plane. This characteristic was typical of the “transition” structures, creating the so-called “5G NSA” (Non Stand-Alone “) version.
The use of a 5G SA bubble brings with it some advantages, such as:
No use of a second radio structure for the realization of the control plane functions
Lack of need to use a license for the second radio frequency on which the control and authentication functions are carried out
Less electromagnetic impact resulting from the use of fewer radiant elements (on different frequencies)
Full network functionality in accordance with the software release used
The Core Network is equipped with the components:
SMF
AMF
UDM
PCF
UPF
For adequate use in scenarios with multiple actors, the system is preconfigured with 100 users and sized for 50 simultaneous connections. Furthermore, the ability to use the PTT (Push-To-Talk) service, widely used by emergency teams during operations, is guaranteed, as well as the IMS (IP Multimedia Subsystem) service for the transmission of voice calls, including group calls, between different groups of operators with different priorities.
As for the radio component, the gNB operates in the N78 band, with a channel width of 20 Mhz and allows the creation of up to 2 sectors and TDD operating mode, i.e. the same frequency will be used for both the downlink and the uplink.
Some details of the 5G radio solution employed are:
Creation of a 4X4 MIMO sector
20W of transmission power
Operating band N78
NCS Xeon D-1539 server with 48GB of RAM
Nokia AMIA – Airscale Subrack 473098A
Nokia ASIB – Airscale common 473764A
Nokia AZQJ – RRH 8T8R N78 320W
AlphaWireless AW3265 omnidirectional antenna
BTI Wireless directive antenna
In support of the bill, the following are available:
- 4 rugged doogee V10 smartphones operating in the N78 band
- 4 Bodycam T8 Telo Systems wearable devices, which connect to smartphones to stream images
- 1 CPE BTI Wireless Chateau 5G-SN
- 1 CPE Microtik CPX80P
- 1 HikVision IP Camera