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Glossary of terms and abbreviations

3GPP 3G Partnership Project

ACB Access Class Barring

ACK Acknowledgement

AICH Acquisition Indication Channel

ALCAP Access Link Control Application ProtocolAPN Access Point Number

AM Acknowledged Mode

ARQ Automatic Repeat Request

AS Access Stratum

ATM Asynchronous Transfer Mode

BCCH Broadcast Control Channel

BER Bit Error Rate

BLER Block Error Rate

BSIC Base Station Identity Code (GSM)

BSS Base Station Subsystem (GSM)

CAC Call Admission Control

CCPCH Common Control Physical Channel

CM Configuration Management / Connection ManagementCN Core Network 

CongC Congestion Control

CPICH Common Pilot Channel

CQI Channel Quality Indicator

CRC Cyclic Redundancy Checksum

CRCI CRC Indicator

CS Circuit Switched

DAHO Database Assisted HO

DBC Dynamic Bearer Control

DCCH Dedicated Control Channel

DCH Dedicated Channel

DL Downlink 

DRNC Drift RNCDRX Discontinuous Reception

EDCH Enhanced DCH

ETSI European Telecommunication Standard Institute

FACH Forward Access Channel

FDD Frequency Division Duplex

FM Fault Management

FP Framing Protocol

FSN First SN

FTP File Transfer Protocol

GGSN Gateway GPRS Support Node

GMM GPRS MM

GPRS General Packet Radio Services

GPS Global Positioning SystemGSM Global System for Mobile Communication

HCS Hierarchical Cell Structure

HLR Home Location Register

HHO Hard Handover

HO Handover

H-PLMN Home PLMN

HSDPA High Speed Downlink Packet Access

HS-DSCH High Speed Downlink Shared Channel

HSUPA High Speed Uplink Packet Access

HTTP Hyper Text Transfer Protocol

H-USDPA High Speed Downlink Packet Access

HW Hardware

IE Information Element

ICMP Internet Control Message Protocol

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IP Internet Protocol

IRAT Inter Radio Access Technology

KPI Key Performance Indicator

LA Location Area

LWS Lucent Worldwide Services

MAC Medium Access Control

MAC-hs Medium Access Control high speedMAHO Mobile Assisted HO

MIB Master Information Block 

MM Mobility Management

MMS Multi Media SMS

MO Mobile Originating

MOS Mean Opinion Score

MSC Mobile Switching Centre

MSS Maximum Segment Size

MNC Mobile Network Code

MT Mobile Terminating

NACK Negative ACK 

NAS Non access stratum

NBAP NodeB Application PartNTP Network Time Protocol

O&M Operation and Maintenance

OMC-U Operations and Maintenance Centre UMTS

PCPICH Primary CPICH

PC Power Control

PCH Paging Channel

PDCP Packet Data Convergence Protocol

PDP Packet Data Protocol

PDU Protocol Data Unit

PHY Physical Layer

PICH Paging Indication Channel

PLMN Public Land Mobile Network 

PM Performance MeasurementPPP Point to Point Protocol

PS Packet Switched

PSC Primary Scrambling Code

QE Quality Estimate

QoS Quality of Service

RA Routing Area

RAB Radio Access Bearer

RACH Random Access Channel

RAN Radio Access Network 

RANAP Radio Access Network Application Part

RB Radio Bearer

RL Radio Link 

RLC Radio Link ControlRLF Radio Link Failure

RF Radio Frequency

RFCT RF Call Trace (also called IMSI tracing)

RNC Radio Network Controller

RNSAP Radio Network Subsystem Application Part

RRC Radio Resource Control

RRM Radio Resource Management

RSSI Received Signal Strength Indicator

RSCP Received Signal Code Power

RTP Real Time Protocol

RTT Round Trip Time

RXLEV Receive Level (GSM)

SACK Selective ACKs

SC Scrambling Code

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SCCPCH Secondary CCPCH

SCH Synchronization Channel

SDU Service Data Unit

SGSN Serving GPRS Support Node

SHO Soft/softer Handover

SIB System Information Broadcast

SIM Subscriber Identity ModuleSIR Signal to Interference Ratio

SM Session Management

SMS Short Message Service

SN Sequence Number

SRB Signalling Radio Bearer

SRNC Serving RNC

TB Transport Block 

TBS Transport Block Size

TCP Transmission Control Protocol

TGPS Transmission Gap Pattern Sequence

TM Transparent Mode

TPC Transmit Power Control

TSSI Transmitted Signal Strength IndicatorTX Transmitted

UDP User Datagram Protocol

UE User Equipment (mobile station)

UL Uplink 

UM Unacknowledged Mode

UMTS Universal Mobile Telecommunication Standard

URA UTRAN Registration Area

U-SIM UMTS Subscriber Identity Module

UTRAN UMTS Terrestrial Radio Access Network 

VT Video Telephony

ANR is a functionality on eNB that helps eNB build the neighbour cell information

dynamically.An eNB supporting ANR will instruct the UEs to perform neighbour cell

measurements and send them the report on a given event(as dictated by the

eNB) , using which the eNB will build the NRT.

For each cell the eNB has, it maintains a NRT(Neighbour relation table). For each

NR, the NRT contains the Target Cell Identifier (TCI), which identifies the target

cell. For E-UTRAN, the TCI corresponds to the E-UTRAN Cell Global Identifier

(ECGI) and Physical Cell Identifier (PCI) of the target cell(it also has PLMNids and

 TAC)

 The serving cell of eNB (with ANR func), may instruct the UE to perform

neighbour measurements on Intra-LTE, inter-RAT cells. The NR can also be statically provisioned by the OSS(OA&M) infrastructure.

 The eNB will use this information for performing the UE handovers as it knows the

PCI and ECGI.

 The idea is to ensure that the relationship configuration time does not affect the

successful handover.