For the purposes of the present document, the following terms and definitions below apply. Terms and definitions not defined below can be found in TR 21.905
Cell Load-Based Inter-System Handover:
This mechanism, which is contained within a UTRAN RNC, consists of three primary functions:
The RNC has the capability to generate and send Cell Load Information towards the target/source system.
The RNC has the capability to receive Cell Load Information from the target/source system, and is able to interpret this information.
The ability of the RNC to make a handover decision by comparing the Cell Load Information that it has received from the target system with the Cell Load Information it has about its own cells.
defines both the Ciphering Status (started/not started) together with the Ciphering Algorithm considered altogether.
Core Network operator:
RNC-ID corresponding to an eNB ID, which enables a source RNC to address a target eNB for handover purposes via CN elements that cannot interprete an eNB ID (see TS 23.401
a UTRAN cell broadcasting a CSG Indicator and a CSG identity. This cell operates in Closed Access Mode as defined in TS 22.220
DCN identity identifies a specific decicated core network (DCN).
Default CN node:
An RNC with an inactive or not implemented NAS Node Selection Function TS 23.236
has one single permanent default CN node per CN domain. It always initiates the Initial UE Message procedure towards its default CN node. If the NAS Node Selection Function is active, then no Default CN node exists.
Directed retry is the process of assigning a User Equipment to a radio resource that does not belong to the serving RNC e.g. in situations of congestion. It is triggered by the RAB Assignment procedure and employs relocation procedures.
RANAP protocol consists of Elementary Procedures (EPs). An Elementary Procedure is a unit of interaction between the RNS and the CN. These Elementary Procedures are defined separately and are intended to be used to build up complete sequences in a flexible manner. If the independence between some EPs is restricted, it is described under the relevant EP description. Unless otherwise stated by the restrictions, the EPs may be invoked independently of each other as stand alone procedures, which can be active in parallel. Examples on using several RANAP EPs together with each other and EPs from other interfaces can be found in reference TR 25.931
An EP consists of an initiating message and possibly a response message. Three kinds of EPs are used:
Class 1: Elementary Procedures with response (success and/or failure).
Class 2: Elementary Procedures without response.
Class 3: Elementary Procedures with possibility of multiple responses.
For Class 1 EPs, the types of responses can be as follows:
A signalling message explicitly indicates that the elementary procedure successfully completed with the receipt of the response.
A signalling message explicitly indicates that the EP failed.
On time supervision expiry (i.e. absence of expected response).
Successful and Unsuccessful:
One signalling message reports both successful and unsuccessful outcome for the different included requests. The response message used is the one defined for successful outcome.
Class 2 EPs are considered always successful.
Class 3 EPs have one or several response messages reporting both successful, unsuccessful outcome of the requests and temporary status information about the requests. This type of EP only terminates through response(s) or EP timer expiry.
denotes a method where the relocation of the SRNS functionality is prepared via RNSAP means. The CN is not informed until the preparation and execution of the relocation has taken place.
Gateway Core Network:
GERAN BSC in Iu mode:
In the context of this specification no distinction between an UTRAN RNC and a GERAN BSC in Iu mode is made. The GERAN BSC in Iu mode will behave as a RNC unless explicitely stated (see TS 43.051
Integrity Protection Alternative:
a UTRAN cell broadcasting a CSG Identity and operating in Hybrid Access Mode as defined in TS 22.220
defines both the Integrity Protection Status (started/not started) together with the Integrity Protection Algorithm considered altogether.
Local Home Network:
Management Based Activation:
MBMS Bearer Service:
MBMS Iu signalling connection:
MBMS Service Area:
MBMS Service Context:
MBMS session start:
MBMS session stop:
Multi-Operator Core Network:
Network sharing non-supporting UE:
Network sharing supporting UE:
Packet System Information:
Relocation of SRNS:
RAN Information Management:
Trace Recording Session:
Trace Recording Session Reference:
relocation of SRNS is a UMTS functionality used to relocate the serving RNS role from one RNS to another RNS. This UMTS functionality is realised by several elementary procedures executed in several interfaces and by several protocols and it may involve a change in the radio resources used between UTRAN and UE
It is also possible to relocate the serving RNS role from:
one RNS within UMTS to another relocation target external to UMTS;
functionality equivalent to the serving RNS role from another relocation source external to UMTS to another RNS.
SRNC is the RNC belonging to SRNS
role an RNS can take with respect to a specific connection between an UE and UTRAN. There is one serving RNS for each UE that has a connection to UTRAN. The serving RNS is in charge of the radio connection between a UE and the UTRAN. The serving RNS terminates the Iu for this UE
Signalling Based Activation:
source RNC is the RNC belonging to source RNS
role, with respect to a specific connection between UTRAN and CN, that RNS takes when it decides to initiate a relocation of SRNS
System Information in GERAN:
target RNC is the RNC belonging to target RNS
role an RNS gets with respect to a specific connection between UTRAN and CN when it is being a subject of a relocation of SRNS which is being made towards that RNS
UE Specific Behaviour Information - Iu:
Applicable abbreviations can be found in TR 21.905
. For the purposes of the present document, the following abbreviations apply:
ATM Adaptation Layer type 2
Access Link Control Application Part
Access Point Name
Abstract Syntax Notation One
Asynchronous Transfer Mode
BeiDou Navigation Satellite System
Base Station Controller
Closed Subscriber Group
Dedicated Core Network
Downlink Shared Channel
Galileo and Additional Navigation Satellite Systems
GSM/EDGE Radio Access Network
General Packet Radio System
Global System for Mobile communications
GPRS Tunnelling Protocol
GateWay Core Network
Home Node B
International Mobile Equipment Identity
International Mobile Subscriber Identity
Internet Protocol (version 4)
Internet Protocol (version 6)
Local IP Access
Local Home Network
Local Home Network ID
Multimedia Broadcast Multicast Service
Metropolitan Beacon System
Minimization of Drive Tests
Multi Operator Core Network
Mobile services Switching Center
MS International PSTN/ISDN Number
Multimedia Telephony Service for IMS
Network Assisted Cell Change
Non Access Stratum
NAS Node Selection Function
Network - Protocol Data Unit
Octet Stream Protocol: Internet-Hosted Octet Stream Service
Packet Data Convergence Protocol
Packet Data Protocol
Protocol Data Unit
Public Land Mobile Network
Packet System Information
Point To Point
Provision of UE Specific Behaviour Information to Network Entities
Quality of Experience
Quality of Service
Radio Access Bearer
Radio Access Network Application Part
Radio Access Technology
RAN Information Management
Radio Network Controller
Radio Network Subsystem
Radio Resource Control
reverse Single Radio Voice Call Continuity
Service Area Identifier
Service Access Point
Service Data Unit
Serving GPRS Support Node
System Information in GERAN
Selected IP Traffic Offload
Selected IP Traffic Offload at the Local Network
Shared Network Area
Shared Network Area Code
Single Radio Voice Call Continuity
Tunnel Endpoint Identifier
Temporary Mobile Group Identity
Temporary Mobile Subscriber Identity
UMTS Encryption Algorithm
UE Specific Behaviour Information - Iu
UMTS Integrity Algorithm
Universal Mobile Telecommunications System
Uplink Shared Channel
UMTS Terrestrial Radio Access
UMTS Terrestrial Radio Access Network