RANAP (Radio Access Network Application
Part) is the Radio Network Layer signaling protocol
for the Iu interface. It resides in the UTRAN &
the Core Network (CN).
RANAP
Stack Iu Interface
API
Primitives
RANAP handles signaling for the following:
Iu-PS - RNC and 3G SGSN
Iu-CS - RNC and 3G MSC
It also provides signaling channel to
transparently pass messages between the User Equipment
(UE) and the CN.
Over the Iu interface, RANAP is used
to:
Facilitate general UTRAN procedures
from the Core Network such as paging
Separate each User Equipment (UE) on
protocol level for mobile specific signaling management
Transfer transparently non-access signaling
Request and manage various types of
UTRAN Radio Access Bearers
Perform the Serving Radio Network Subsystem(SRNS)
Relocation
The CN RANAP Stack protocol implementation
from Aricent provides support
for all RANAP Elementary Procedures (EPs) for accomplishing
Radio Access Bearer Management, Serving RNS
Relocation, Transport of NAS Information between UE
and CN, Paging UE and Release of Iu resources.
Aricent’ CN RANAP offering includes:
Encoding/Decoding for all Iu-CS and
Iu-PS messages in RANAP
Iu connection management on top of
SCCP for all connection-less and connection-oriented
messages
Error Indication procedures for Protocol
errors detected during message validation
Timers for elementary procedures
Implementation for complete handling
of Overload, Reset and Reset Resource Elementary procedures.
