User's Manual

Figure 36: Antenna configuration with four CHUs and TX FILTER
3.5 Redundancy options
ACCESSNET-T IP provides numerous redundancy concepts to ensure the availability of
services and features reliably even in exceptional situations. The concept of designing
system functions, function blocks, network elements and connection routes redundantly,
may be required to ensure location reliability and system reliability. Location and system
reliability refers to the capability of the network to perpetuate the operation of the overall
system, even if one location or route drops out completely or partially (due to technical
failure, natural phenomena, acts of terrorism etc.).
The system technology allows flexible network structures and scalable redundancy solu-
tions that account for the different requirements for availability and capacity within an
complete network.
If the DIB-R5 advanced should be isolated from the rest of the network, it still provides
most of its features in local fallback operation. Especially security-related features like
authentication and air interface encryption are supported. Hence, DIB-R5 advanced ena-
bles a fully functional fallback operation and full redundancy for the important compo-
nents transceiver (CHU), control unit (BSCU) and voltage supply.
The following chapters describe the available redundancy options in conjunction with
DIB-R5 advanced:
n Ä Redundant main control channel (MCCH)
n
Ä Transceiver redundancy
n Ä Controller redundancy
n
Ä Fallback operation
n Ä Stand-alone operation
n
Ä Redundant V
AC
voltage supply
n Ä Redundant connection to the transport network
n Ä Redundant synchronization (GNSS, PTP)
Product description
Redundancy options
DIB-R5 advanced
60 Operation Manual 90DIBR5advancedOM02 - 1.0