3 Definitions, symbols and abbreviations
25.4133GPPRelease 17TSUTRAN Iu interface Radio Access Network Application Part (RANAP) signalling
3.1 Definitions
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 [35].
Cell Load-Based Inter-System Handover: This mechanism, which is contained within a UTRAN RNC, consists of three primary functions:
1. The RNC has the capability to generate and send Cell Load Information towards the target/source system.
2. The RNC has the capability to receive Cell Load Information from the target/source system, and is able to interpret this information.
3. 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.
Ciphering Alternative: defines both the Ciphering Status (started/not started) together with the Ciphering Algorithm considered altogether.
Core Network operator: as defined in TS 23.251 [39].
Corresponding RNC-ID: 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 [48]).
CSG Cell: a UTRAN cell broadcasting a CSG Indicator and a CSG identity. This cell operates in Closed Access Mode as defined in TS 22.220 [56].
DCN-ID: 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 [26] 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: 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.
Elementary Procedure: 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 [4].
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:
Successful:
– A signalling message explicitly indicates that the elementary procedure successfully completed with the receipt of the response.
Unsuccessful:
– 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.
Enhanced relocation: 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: as defined in TS 23.251 [39].
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 [27]).
Hybrid Cell: a UTRAN cell broadcasting a CSG Identity and operating in Hybrid Access Mode as defined in TS 22.220 [56].
Integrity Protection Alternative: defines both the Integrity Protection Status (started/not started) together with the Integrity Protection Algorithm considered altogether.
Local Home Network: as defined in TS 23.060 [21].
Management Based Activation: as defined in TS 32.421 [37].
MBMS Bearer Service: as defined in TS 23.246 [41].
MBMS Iu signalling connection: as defined in TS 25.346 [42].
MBMS RAB: as defined in TS 25.346 [42].
MBMS Service Area: as defined in TS 23.246 [41].
MBMS Service Context: as defined in TS 25.346 [42].
MBMS Session: as defined in TS 25.346 [42].
MBMS session start: as defined in TS 25.346 [42].
MBMS session stop: as defined in TS 25.346 [42].
Multicast Service: as defined in TS 22.146 [40].
Multi-Operator Core Network: as defined in TS 23.251 [39].
Network sharing non-supporting UE: as defined in TS 23.251 [39].
Network sharing supporting UE: as defined in TS 23.251 [39].
Packet System Information: as defined in TS 44.060 [46].
PUESBINE feature: as defined in TS 23.195 [33].
Relocation of SRNS: 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.
RAN Information Management: as defined in TS 48.018 [36].
RNSAP Relocation: see definition in TS 25.467 [55].
Trace Recording Session: as defined in TS 32.421 [37].
Trace Recording Session Reference: as defined in TS 32.421 [37].
Trace Reference: as defined in TS 32.421 [37].
Trace Session: as defined in TS 32.421 [37].
Serving RNC: SRNC is the RNC belonging to SRNS
Serving RNS: 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: as defined in TS 32.421 [37].
Source RNC: source RNC is the RNC belonging to source RNS
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: as defined in TS 44.018 [45].
Target RNC: target RNC is the RNC belonging to target RNS
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: as defined in TS 23.195 [33].
3.2 Symbols
Void.
3.3 Abbreviations
Applicable abbreviations can be found in TR 21.905 [35]. For the purposes of the present document, the following abbreviations apply:
AAL2 ATM Adaptation Layer type 2
ALCAP Access Link Control Application Part
APN Access Point Name
AS Access Stratum
ASN.1 Abstract Syntax Notation One
ATM Asynchronous Transfer Mode
BDS BeiDou Navigation Satellite System
BBF Broadband Forum
BSC Base Station Controller
CC Call Control
CN Core Network
CRNC Controlling RNC
CS Circuit Switched
CSG Closed Subscriber Group
DCH Dedicated Channel
DCN Dedicated Core Network
DL Downlink
DRNC Drift RNC
DRNS Drift RNS
DSCH Downlink Shared Channel
eNB E-UTRA NodeB
EP Elementary Procedure
E-UTRA Evolved UTRA
E-UTRAN Evolved UTRAN
GANSS Galileo and Additional Navigation Satellite Systems
GERAN GSM/EDGE Radio Access Network
GPRS General Packet Radio System
GSM Global System for Mobile communications
GTP GPRS Tunnelling Protocol
GWCN GateWay Core Network
HNB Home Node B
IE Information Element
IMEI International Mobile Equipment Identity
IMSI International Mobile Subscriber Identity
IPv4 Internet Protocol (version 4)
IPv6 Internet Protocol (version 6)
IRAT Inter-RAT
L-GW Local GateWay
LIPA Local IP Access
LHN Local Home Network
LHN ID Local Home Network ID
MBMS Multimedia Broadcast Multicast Service
MBS Metropolitan Beacon System
MDT Minimization of Drive Tests
MM Mobility Management
MOCN Multi Operator Core Network
MSC Mobile services Switching Center
MSISDN MS International PSTN/ISDN Number
MTSI Multimedia Telephony Service for IMS
NACC Network Assisted Cell Change
NAS Non Access Stratum
NNSF NAS Node Selection Function
NRT Non-Real Time
N-PDU Network – Protocol Data Unit
OSP:IHOSS Octet Stream Protocol: Internet-Hosted Octet Stream Service
P-TMSI Packet TMSI
PDCP Packet Data Convergence Protocol
PDP Packet Data Protocol
PDU Protocol Data Unit
PLMN Public Land Mobile Network
PPP Point-to-Point Protocol
PS Packet Switched
PSI Packet System Information
PTP Point To Point
PUESBINE Provision of UE Specific Behaviour Information to Network Entities
QoE Quality of Experience
QoS Quality of Service
RAB Radio Access Bearer
RANAP Radio Access Network Application Part
RAT Radio Access Technology
RIM RAN Information Management
RNC Radio Network Controller
RNS Radio Network Subsystem
RRC Radio Resource Control
rSRVCC reverse Single Radio Voice Call Continuity
RT Real Time
SAI Service Area Identifier
SAP Service Access Point
SDU Service Data Unit
SGSN Serving GPRS Support Node
S-GW Serving GateWay
SI System Information in GERAN
SIPTO Selected IP Traffic Offload
SIPTO@LN Selected IP Traffic Offload at the Local Network
SNA Shared Network Area
SNAC Shared Network Area Code
SRNC Serving RNC
SRNS Serving RNS
SRVCC Single Radio Voice Call Continuity
TEID Tunnel Endpoint Identifier
TMGI Temporary Mobile Group Identity
TMSI Temporary Mobile Subscriber Identity
UE User Equipment
UEA UMTS Encryption Algorithm
UESBI-Iu UE Specific Behaviour Information – Iu
UIA UMTS Integrity Algorithm
UL Uplink
UMTS Universal Mobile Telecommunications System
USCH Uplink Shared Channel
UTRA UMTS Terrestrial Radio Access
UTRAN UMTS Terrestrial Radio Access Network