GPRS –Mobile Internet
GPRS -General Packet Radio Service is the world's most ubiquitous wireless data service. GPRS is available with almost every GSM network. It is a connectivity solution based on Internet Protocols that supports a wide range of enterprise and consumer applications with throughput speed of up to 40kbit/s which is similar speed to a dial-up modem. With it you are able to connect from anywhere. Customers can enjoy advanced & feature-rich data services such as fully functional Internet browsing & e-mail.
EDGE –Fast Technology
A fast data speed than GSM network is provided by EDGE -Enhanced Data rates for GSM Evolution (EDGE) technology. EDGE gives up to three times more data capacity of GPRS. With EDGE mobile operators can handle three times more subscribers than GPRS & triple data rate per subscriber or add extra capacity to their voice communications. EDGE technology uses the same TDMA -Time Division Multiple Access frame structure, logic channel and 200 kHz carrier bandwidth as today's GSM networks which allows it to be used directly onto an existing GSM network.
For many existing SM/GPRS networks, EDGE is a simple software-upgrade. EDGE allows the more advanced mobile services such as the downloading of video and music clips, fully multimedia message, high-speed Internet and e-mail and powerful visual communications such as video streaming.
It has a very small incremental cost of including EDGE capability in GSM network. All new GSM operators are EDGE capable and all new mid- to high-level GSM devices also include EDGE technology. According to GSA -Global mobile Suppliers Association states that there were 223 commercial GSM/EDGE networks in 113 countries, from a total of 287 mobile network operator commitments in 142 countries as of May 2007.
All of Mobile Terms & Acronyms:
1G
The first generation of analogue mobile phone technologies including AMPS, TACS and NMT
2G
The second generation of digital mobile phone technologies including GSM, CDMA IS-95 and D-AMPS IS-136
The enhancement of GSM which includes technologies such as GPRS
3G
The third generation of mobile phone technologies covered by the ITU IMT-2000 family
3GPP
The 3rd Generation Partnership Project, a grouping of international standards bodies, operators and vendors with the responsibility of standardizing the WCDMA based members of the IMT-2000 family
3GPP2
The counterpart of 3GPP with responsibility for standardizing & CDMA2000 based members of the IMT-2000 family. 3GPP2 is spearheaded by ANSI
8PSK
Octant Phase Shift Keying
A5/1/2/3/8X
Encryption algorithms for GSM networks
AAL
ATM Adaptation Layer
ABR
Available Bit Rate
A-bis
Interface between the BSC and BTS in a GSM network
AB
Access Burst, used for random access and characterized by a longer guard period to allow for burst transmission from a MS that does not know the correct timing advance when first contacting a network
ACTE
Approvals Committee for Terminal Equipment
ACTS
Advanced Communications Technologies and Services – a European technology initiative
ACU
Antenna Combining Unit
ADPCM
Adaptive Differential Pulse Code Modulation, a form of voice compression that typically uses 32kbit/s
AFC
Automatic Frequency Control
AGCH
Access Grant Channel, downlink only, BTS allocates a TCH or SDCCH to the MS, allowing it access to the network
Air interface
In a mobile phone network, the radio transmission path between the base station and the mobile terminal
A-interface
Interface between the MSC and BSS in a GSM network
AM
Amplitude Modulation
AMPS
Advanced Mobile Phone System, the analogue mobile phone technology used in North and South America and in around 35 other countries. Operates in the 800MHz band using FDMA technology
AMR
Adaptive Multi-Rate codec Developed in 1999 for use in GSM networks, the AMR
Has been adopted by 3GPP for 3G
Analogue
The representation of information by a continuously variable physical quantity such as voltage
ANSI
American National Standards Institute. An non-profit making US organization which does not carry out standardization work but reviews the work of standards bodies and assigns them category codes and numbers
ANSI-136
See D-AMPS
API
Application Program Interface
AoC
Advice of Charge
ARIB
Association of Radio Industries & Businesses is an organization established by Japan’s Ministry of Posts and Communications to act as the standardization authority for radio communication and broadcasting
ARPU
Average Revenue per User
ASCII
American Standard Code for Information Interchange
ASIC
Application Specific Integrated Circuit
ASP
Application Service Provider
Asymmetric Transmission
Data transmissions where the traffic from the network to the subscriber is at a higher rate than the traffic from the subscriber to the network
A-TDMA
Advanced Time Division Multiple Access
ATM
Asynchronous Transfer Mode, a multiplexed information transfer and switching method in which the data is organized into fixed length 53-octet cells and transmitted according to each application’s instantaneous need
AUC
Authentication Centre, the element within a GSM network which generates the parameters for subscriber authentication
Bandwidth
A term meaning both the width of a transmission channel in terms of Hertz and the maximum transmission speed in bits per second that it will support
BCH
Broadcast Channels, carry only downlink information and are mainly responsible for synchronization and frequency correction (BCCH, FCCH and SCH)
BCCH
Broadcast Control Channel, the logical channel used in cellular networks to broadcast signaling and control information to all mobile phones within the network
B-CDMA
Broadband Code Division Multiple Access
B-ISDN
Broadband ISDN
BER
Bit Error Rate, the percentage of received bits in error compared to the total number of bits received
BERT
Bit Error Rate Test
Bit
A bit is the smallest unit of information technology. As bits are made up using the binary number system, all multiples of bits must be powers of two i.e. a kilobit is actually 1024 bits and a megabit 1048576 bits. Transmission speeds are given in bits per second (bit/s)
Bluetooth
A low power, short range wireless technology designed to provide a replacement for the serial cable. Operating in the 2.4GHz ISM band, Bluetooth can connect a wide range of personal, professional and domestic devices such a laptop computer and mobile phones together wirelessly.
BHCA
Busy Hour Call Attempts, the number of call attempts made during a network’s busiest hour of the day
BSC
Base Station Controller, the network entity controlling a number of Base Transceiver Stations
BSS
Base Station System/Subsystem
BTS
Base Transceiver Station, the network entity which communicates with the mobile station
CAI
Common Air Interface, a standard developed for the UK’s public CT2 networks which enabled the same handset to be used on different networks
CAMEL
Customized Application for Mobile network Enhanced Logic, an IN feature in GSM networks that enables users to carry personal services with them when roaming into other networks that support CAMEL
CSE
CAMEL Service Environment
Capacity
A measure of a cellular network’s ability to support simultaneous calls
CB
Cell Broadcast
CC
Call Control, manages call connections
CCB
Customer Care and Billing
CCCH
Common Control Channels, a group of uplink and downlink channels between the MS and the BTS (see PCH, AGCH and RACH)
CCS7
Common Channel Signaling No. 7
CDMA
Code Division Multiple Access, also known as spread spectrum, CDMA cellular systems utilize a single frequency band for all traffic, differentiating the individual transmissions by assigning them unique codes before transmission. There are a number of variants of CDMA (see W-CDMA, B-CDMA, TD-SCDMA et al)
CDMA one
The first commercial CDMA cellular system, deployed in North America and Korea, also known as IS-95
CDMA2000
A member of the IMT-2000 3G family, backwardly compatible with CDMA One
CDMA 1X
The first generation of CDMA 2000, the standardization process indicated that there would be CDMA 2X and CDMA 3X but this no longer appears likely
CDMA 1X EV-DO
A variant of CDMA 1X which delivers data only
CDPD
Cellular Digital Packet Data, a packet switched data service largely deployed in the USA. The service uses idle analogue channels to carry the packets information.
CDPSK
Coherent Differential Phase Shift Keying
CDR
Call Detail Records, the record made within the cellular network of all details of both incoming and outgoing calls made by subscribers, The CDR is passed to the billing system for action
Cell
The area covered by a cellular base station. A cell site may rectories its antennas to service several cells from one location Cell site
The facility housing the transmitters/receivers, the antennas and associated equipment
Cell splitting
The process of converting a single cell to multiple cells by sector the antennas in the cell site or constructing additional cells within a cell site
CELP
Code Excited Linear Prediction, an analogue to digital voice coding scheme, there are a number of variants used in cellular systems
CEPT
Conference of European Posts & Telecommunications is an organization of national posts, telegraphs and telephone administrations. Until 1988, when this work was taking over by ETSI, the main European body for telecommunications standardization. CEPT established the original GSM standardization group
CF
Call Forwarding
CI
Carrier to Interference ratio
CIBER
Cellular Inter carrier Billing Exchange Roamer Record
CID
Caller Identification
Circuit switching
A method used in telecommunications where a temporary dedicated circuit of constant bandwidth is established between two distant endpoints in a network. Mainly used for voice traffic, the opposite of packet switching
CLID
Calling Line Identification
CLIP
Calling Line Identification Presentation
CLIR
Calling Line Identification Restriction
CM
Connection Management, is used to set up, maintain and take down call connections
CMOS
Complementary Metal Oxide Substrate
Codec
A word formed by combining coder and decoder the codec is a device which encodes and decodes signals. The voice codec in a cellular network converts voice signals into and back from bit strings. In GSM networks, in addition to the standard voice codec, it is possible to implement Half Rate (HR) codec and Enhanced Full Rate (EFR) codec.
Control signal
A signal sent to a cellular phone from a base station or vice versa which carries information essential to the call but not including the audio portion of a conversation
CPE
Customer Premises Equipment, all the equipment on the end user’s side of the network interface
CPU
Central Processing Unit
CRC
Cyclic Redundancy Check
CRM
Customer Relationship Management
CSS
Customer Support System
CT
Cordless Telephony
CT0
Zero generation cordless telephony, the earliest domestic cordless phones which used analogue technology and which had severe limitations in terms of range and security
CT1
First generation cordless telephony, improved analogue phones with greater range and security, a number of European nations produced CT1 standards
CT2
Second generation cordless telephony, Using digital technology CT2 phones offered greater range, improved security and a wide range of new functionalities. Used in both domestic and cordless PABX deployments, CT2 was standardized as an interim ETS but was overwhelmed by DECT
CT2-CAI
Second generation cordless telephony-common air interface
CTA
Cordless Terminal Adaptor, a DECT term
CTM
Cordless Terminal Mobility
CTR
Common Technical Regulation, part of the ETSI standardization process
CUG
Closed User Group
D/A
Digital to Analogue conversion
DAC
Digital to Analogue Converter
DAMA
Demand Assigned Multiple Access
D-AMPS
Digital AMPS, a US wireless standard also known as IS-136
DAN
DECT Access Node
DCA
Dynamic Channel Assignment
DCCH
Dedicated Control Channels, responsible for roaming, handovers, encryption etc. (See SDCCH, SACCH and FACCH)
DCE
Data Communications Equipment
DCH
Data Clearing House
DCPSK
Differentially Coherent Phase Shift Keying
DCS1800
Digital Cellular System at 1800MHz, now known as GSM1800
DECT
Digitally Enhanced Cordless Telecommunications system, a second generation digital cordless technology standardized by ETSI
DEPSK
Differential Encoded Phase Shift Keying
DES
Digital Encryption Standard
DFSK
Double Frequency Shift Keying
Digital
A method of representing information as numbers with discrete values, usually expressed as a sequence of bits
DPCM
Differential Pulse Code Modulation
DPSK
Digital Phase Shift Keying
DQPSK
Digital Quadrate Phase Shift Keying
DS-CDMA
Direct Sequence CDMA
DSP
Digital Signal Processing
DSRR
Digital Short Range Radio, a UK standard for a low power, short range radio system designed for small voice and data networks
DTE
Data Terminal Equipment
DTMF
Dual Tone Multi Frequency, better know as Touch Tone is a tones generated by touching the keys on the phone are used for a variety of purposes including voice mail systems and voice messaging
DTX
Discontinuous Transmission
Dual Band
It is the capability of GSM infrastructure elements and handsets to work across both the 900MHz and 1800MHz bands. The capability to seamlessly handover between the two bands offers operators major capacity gains
DB
Dummy Burst, transmitted as filler in unused timeslots of the carrier
Duplex
The wireless technique where one frequency band is used for traffic from the network to the subscriber (the downlink) and another, widely separated, band is used for traffic from the subscriber to the network (the uplink)
EDGE
Enhanced Data rates for GSM Evolution is an effectively the final stage in the evolution of the GSM standard, EDGE uses a new modulation schema to enable theoretical data speeds of up to 384kbit/s within the existing GSM spectrum. An alternative upgrade path towards 3G services for operators, such as those in the USA, without access to new spectrum. Also known as Enhanced GPRS (E-GPRS)
EEPROM
Electrically Erasable Programmable Read Only Memory
EFR
Enhanced Full Rate, an alternative voice codec that provides improved voice quality in a GSM network (see codec)
EFT
Electronic Funds Transfer
EGSM
Extended (frequency range) GSM
EIR
Equipment Identity Register, a database that contains a list of all valid mobile stations within a network based on their IMEI
EIRP
Effective Isotropic Radiated Power
EPOC
The mobile phone operating system developed by Symbian. Derived from epoch-the beginning of an era-EPOC is a 32-bit operating environment which comprises a suite of applications, customizable user interfaces, connectivity options and a range of development tools
EPROM
Erasable Programmable Read Only Memory
Erlang
A dimensionless unit of average traffic density in a telecommunications network
ERMES
Enhanced Radio Messaging System, a paging technology developed by ETSI which was intended to allow users to roam throughout Europe. Adopted by a number of European and Middle Eastern countries, ERMES, like paging in general, was overtaken by the ubiquity of GSM
ERO
European Radio communications Office
ERP
Effective Radiated Power
ESMR
Enhanced Special Mobile Radio, a US PMR variant (see SMR)
ESN
Electronic Serial Number, a 32-bit number that uniquely identifies a mobile phone
ESPRIT
European Strategic Programmed for Research and Development in Information Technology
ETACS
Extended TACS, the extension of TACS by the addition of new frequencies
ETSI
European Telecommunications Standards Institute: The European group responsible for defining telecommunications standards
FACCH
Fast Associated Control Channel, similar to the SDCCH but used in parallel for operation of the TCH. If the data rate of the SACCH is insufficient borrowing mode is used
FB
Frequency Correction burst, used for frequency synchronization of the mobile
FCC
Federal Communications Commission, the US regulatory body for telecommunications
FCCH
Frequency Correction Channel, downlink only, correction of MS frequencies, transmission of frequency standard to MS etc.
FDD
Frequency Division Duplex, a radio technique which uses paired spectrum, UMTS has an FDD element
FDMA
Frequency Division Multiple Access-a transmission technique where the assigned frequency band for a network is divided into sub-bands which are allocated to a subscriber for the duration of their calls
FEC
Forward Error Correction
FH
Frequency Hopping
FH-CDMA
Frequency Hopping CDMA
FMC
Fixed Mobile Convergence
FMI
Fixed Mobile Integration
FPLMTS
Future Public Land Mobile Telecommunications System, the original title of the ITU’s third generation concept now known as IMT-2000
FRA
Fixed Radio Access, see WLL
FSDPSK
Filtered Symmetric Differential Phase Shift Keying
FSK
Frequency Shift Keying, a method of using frequency modulation to send digital information
FSOQ
Frequency Shift Offset Quadrate Modulation
FSS
Fixed Satellite Service
The interface between the PCU and the SGSN in a GSM/GPRS network
Gc
The interface between the GGSN and the HLR in a GSM/GPRS network
Gd
The interface between the SGSN and the SMSC in a GSM/GPRS network
Gf
The interface between the SGSN and the EIR in a GSM/GPRS network
Gi
The interface between the GGSN and the Internet in a GPRS network
Gn
The interface between the GGSN and the SGSN in a GPRS network
Gp
The interfaces between the GGSN/SGSN and the Border Gateway in a GPRS network
Gr
The interface between the SGSN and the HLR in a GPRS network
Gs
The interface between the SGSN and the MSC in a GSM/GPRS network
GAIT
GSM/ANSI 136 Interoperability Committee
GAP
Generic Access Profile, a DECT term
Gbit/s
A unit of data transmission rate equal to one billion bits per second
GMSC
Gateway Mobile Services Switching Centre, the gateway between two networks
GCF
Global Certification Forum
Geostationary
Refers to a satellite in equatorial orbit above the earth which appears from the surface to be stationary
GERAN
GSM-EDGE Radio Access Network, the name for the evolution of GSM towards 3G based on EDGE
GGRF
GSM Global Roaming Forum
GGSN
Gateway GPRS Support Node is the gateway between a cellular network and an IP network.
GHz
A unit of frequency equal to one billion Hertz per second
GMPCS
Global Mobile Personal Communications by Satellite
GMSK
Gaussian filtered Minimum Shift Keying, a refinement of FSK which minimizes adjacent channel interference
GPRS
General Packet Radio Service, standardized as part of GSM Phase 2+, GPRS represents the first implementation of packet switching within GSM, which is a circuit switched technology. GPRS offers theoretical data speeds of up to 115kbit/s using multislot techniques. GPRS is an essential precursor for 3G as it introduces the packet switched core required for UMTS
GPS
It is a Global Positioning System, a location system based on a constellation of US Department of Defense satellites. Depending on the number of satellites visible to the user can provide accuracies down to tens of meters. Now being incorporated as a key feature in an increasing number of handsets
GRX
GPRS Roaming Exchange
GSM
Global System for Mobile communications, the second generation digital technology originally developed for Europe but which now has in excess of 71 per cent of the world market. Initially developed for operation in the 900MHz band and subsequently modified for the 850, 1800 and 1900MHz bands. GSM originally stood for Grouped Special Mobile, the CEPT committee which began the GSM standardization process
GSM MoU
The GSM Memorandum of Understanding, an agreement signed between all the major European operators to work together to promote GSM. The precursor of the GSM Association
GSM-R
GSM-Railway, A variant of GSM designed to meet the special communications needs of international train operators
Handoff
The transfer of control of a cellular phone call in progress from one cell to another, without any discontinuity
Hands-free
The operation of a cellular phone without using the handset, usually installed in vehicles.
HCS
Hierarchical Cell Structure, the architecture of a multi-layered cellular network where subscribers are handed over from the macro to the micro to the pico layer depending on the current network capacity and the needs of the subscriber
HDLC
High level Data Link Control
HIPERLAN
High Performance Radio Local Access Network, a wireless local area network being standardized by ETSI (Also HIPERLAN2)
HLR
It is a Home Location Register, the database within a GSM network which stores all the subscriber data. An important element in the roaming process
HSCSD
High Speed Circuit Switched Data, a special mode in GSM networks which provides higher data throughput By concatenating a number of timeslots, each delivering 14.4kbit/s, much higher data speeds can be achieved
HSPSD
High Speed Packet Switched Data
The interface between the Node B and the RNC in a UMTS network
Iur
The interface between RNCs in a UMTS network
Iups
The connection between the RNC and the packet switched network in a GSM/GPRS/UMTS network
Iucs
The connection between the RNC and the circuit switched network in a GSM/GPRS/
UMTS network
I-ETS
Interim European Telecommunications Standard
I-mode
A service developed by Japanese operator NTT DoCoMo delivers a huge range of services to subscribers and has proved enormously popular with some 30 million regular users. The revenue sharing model used for I-mode is being adopted by other operators as the basis for the new services enabled by GPRS and 3G
IMEI
International Mobile Equipment Identity
IMSI
International Mobile Subscriber Identity, an internal subscriber identity used only by the network
IMT-2000
It is a family of third generation technologies approved by the ITU. There are five members of the family: IMT-DS, a direct sequence WCDMA FDD solution IMT-TC, a WCDMA TDD solution IMT-MC, a multi carrier solution developed from cdma2000 IMT-SC, a single carrier solution developed from IS-136/UWC-136 IMT-FT, a TDMA/TDD solution derived from DECT
IN
Intelligent Network
INAP
Intelligent Network Application Part
Internet
It is a loose confederation of autonomous databases and networks. Originally developed for academic use the Internet is now a global structure of millions of sites accessible by anyone
Intranet
A private network which utilizes the same techniques as the Internet but is accessible only by authorized users
IP
Internet Protocol
IPR
Intellectual Property Rights
IPv6
The next generation of IP addressing designed to replace the current system IPv4 which uses a 32 bit address code which limits the number of possible addresses. IPv6 uses a 128 bit code ensuring that the possible number of IP addresses will be virtually limitless
IrDA
Infra red Data Association
Iridium
It is a low earth orbit satellite communications system developed initially by Motorola.
IS-54
It is a first evolution in the USA from analogue to digital technology. Used a hybrid of analogue and digital technology, superseded by IS-136
IS-95
Cellular standard know also as cdma One
IS-136
Cellular standard also known as TDMA or D-AMPS
ISDN
Integrated Services Digital Network
ISO
International Standards Organization
ISP
Internet Service Provider
ITU
International Telecommunications Union
ITU-R
ITU Telecommunications Radio Sector
ITU-T
ITU Telecommunications Standardization Sector
IWF
Inter working Function
Java
A programming language developed by Sun Microsystems Java is characterized by the fact that programs written in Java do not rely on an operating system
JPEG
Joint Photographic Experts Group
LAN
Local Area Network
LANS
Local Area Network Services
LAP
Link Access Protocol
LEO
Low Earth Orbit, refers to satellites which orbit the Earth at around 1,000 kilometers
LMSS
Land Mobile Satellite Service
LOS
Line of Sight
MAC
Media Access Control, the lower sub layer of the OSI system
MAN
Metropolitan Area Network
MAP
Mobile Application Part
Mbit/s
Megabit: a unit of data transmission speed equal to one million bits per second
MHz
Megahertz, a unit of frequency equal to one million Hertz
MCPA
Multi Carrier Power Amplifier
MeXe
Mobile Execution Environment, likely to be based on Java, MeXe enables WAP-enabled devices to offer a wider range of features with greater security and flexibility, as well as greater control of telephony features
MFSK
Multiple Frequency Shift Keying
MMI
Man Machine Interface
MMS
Multimedia Messaging Service, an evolution of SMS, MMS goes beyond text messaging offering various kinds of multimedia content including images, audio and video clips
MMSK
Modified Minimum Shift Keying
MNO
Mobile Network Operator
Modulation
It is a process of imposing an information signal on a carrier. This can be done by changing the amplitude (AM), the frequency (FM) or the phase, or any combination of these
MoU
Memorandum of Understanding-
See GSM MoU
MPEG
Motion Picture Experts Group, MPEG4 is a technology for compressing voice and video so that the information can be transmitted over normally difficult links such as mobile radio
MS
Mobile Station
MSC
Mobile Switching Centre, the switching centre of a mobile phone network, the MSC has interfaces to the BSCs, HLR, VLR and other MSCs
MSISDN
Mobile Station International ISDN Number
MSK
Minimum Shift Keying, Another term for FFSK
Multiplexing
It is a telecommunications technique where several channels can be combined to share the same transmission medium. The most common forms are Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM)
MVPN
Mobile Virtual Private Network
N-AMPS
Narrowband AMPS
NB
Normal Burst, used to carry traffic and control channels except RACH
NET
Norme Europeenne de Telecommunications
NMT
Nordic Mobile Telephone system, an analogue cellular technology deployed in the Nordic countries in the late 1970’s, variations were also deployed in the Benelux countries and in Russia. NMT operated in the 450 and 900MHz bands and was the first technology to offer international roaming, albeit only in the Nordic countries
Node B
The element in a UMTS network which interfaces with the mobile station, analogous to a BTS in a GSM network
OTA
Over the air activation (of services and tariff changes)
O&M
Operations and Maintenance
OMC
Operations and Maintenance Centre
OMC-R
The radio OMC
OMC-S
The switching OMC
OSI
Open Systems Interconnection, a seven layer model for protocols defined by ISO
PACS
Personal Access Communication System, a digital cordless technology developed initially by Bell Labs in the US, PACS was designed to compete with DECT
Packet switching
It is a communication system wherein the information is transmitted in packets of a set size. These packets have address headers and find their way to their destination by the most efficient route through the network. Compared to circuit switching where a connection is occupied until the traffic exchange is completed, packet switching offers considerable efficiencies as connections can be used by a number of users simultaneously
PAMR
Public Access Mobile Radio, Commercial service using trunking techniques in which multiple groups of users can set up their own closed systems within a shared public network
PAP
Public Access Profile, a DECT term
PCH
Paging Channel, downlink only, the MS is informed of incoming calls by the BTS via the PCH
PCM
Pulse Code Modulation, the standard digital voice format at 64kbit/s
PCMCIA
Personal Computer Memory Card Interface Association the body responsible for defining the standards and formats for memory expansion cards for laptop computers and PDAs. Now extended to cover cards for mobile phones
PCN
Personal Communications Network, a designation initially used in the UK to refer to networks operating in the 1800MHz band (see also DCS1800). No longer in use
PCS 1900
Personal Communications Systems 1900MHz, the terminology used in the US to describe the new digital networks being deployed in the 1900MHz band, rarely used today
PCU
Packet Control Unit, an element in a GPRS/UMTS network
PDA
Personal Digital Assistant
PDC
Personal Digital Communications, a digital cellular technology developed and deployed uniquely in Japan. A TDMA technology, PDC is incompatible with any other digital cellular standard
PEDC
Pan European Digital Communications, A designation occasionally used in the early 1990’s to describe GSM. No longer in use
Penetration
The percentage of the total population which owns a mobile phone
PHS / PHP
Personal Handy Phone System/Phone, a digital cordless technology developed in Japan which achieved great success. Deployed by NTT DoCoMo and other Japanese operators PHS offered two-way communications, data services and Internet access and eventually won some 28 million customers. Now in decline as cellular wide area capabilities offer better service
PIN
Personal Identifier Number
PKI
Public Key Infrastructure
PLMN
Public Land Mobile Network, any cellular operator’s network
PMR
Private Mobile Radio communications is a two-way radio technology widely used for dispatch and delivery services, taxi companies and the like. See TETRA
POCSAG
Post Office Code Standardization Group, a now defunct industry grouping which standardized pager addressing systems
PoP
Points of Presence, a method of measuring the value of a cellular license, the approximate number of potential customers within a geographical area
POTS
Plain Old Telephone Service
PROM
Programmable Read Only Memory
PSK
Phase Shift Keying
PSRCP
Public Safety Radio Communications Project, an initiative by the UK Government to standardize all emergency services communications on to a single digital technology (see TETRA)
PSDN
Public Switched Data Network
PSPDN
Public Switched Packet Data Network
PSTN
Public Switched Telephone Network
PSU
Power Supply Unit
PTO
Public Telecommunication Operator
PTT
Posts, Telephone and Telegraph Administration
PTT
Push-to-Talk, a feature of PMR systems
PWT
Personal Wireless Telecommunications, a variant of DECT developed for use in the USA
QAM
Quadrate Amplitude Modulation
QAPSK
Quadrate Amplitude Phase Shift Keying
QCELP
Quadrate Code Excited Linear Prediction
QoS
Quality of Service, a broad term to describe the performance attributes of an end-to-end connection
QPSK
Quadrate Phase Shift Keying
RACE
Research in Advanced Communications in Europe
RACH
Random Access Channel, uplink only, allows the MS to request an SDCCH in response to a page or for a call
RAM
Random Access Memory
RFP
Radio Fixed Part, equivalent to a base station in a DECT system
RCC
Radio Common Carrier
RELP
Regular pulse Excitation Linear Prediction coding
Reuse
The assignment of frequencies or channels to cells so that adjoining cells do not use the same frequencies and cause interference whereas more distant cells can use the same frequencies. Reuse expands the capacity of a cellular network by enabling the use of the same channels throughout the network
RP
Radio Part
RNC
Radio Network Controller is an element which controls the Node Bs within a UMTS network. It is roughly analogous to a BSC in a GSM network
Roaming
A service unique to GSM which enables a subscriber to make and receive calls when outside the service area of his home network e.g. when traveling abroad
Router
A device which forwards information in a network on a connectionless basis
RRM
Radio Resource Management, part of the UMTS infrastructure
RT
Remote Terminal
SACCH
Slow Associated Control Channel, transmits continuous measurements in parallel with operation of TCH or SDCCH, needed for handover decisions
SAR
Specific Absorption Rate
SB
Synchronization Burst, used for time synchronization of the mobile
S-CDMA
Synchronous CDMA (see CDMA)
SCH
Synchronization Channel, downlink only frame synchronization and identification of base station
SCP
Switching/Service Control Point
SDCCH
Stand-alone Dedicated Control Channel is a communications channel between the MS and the BTS. Used for signaling during call set-up before a TCH is allocated
SDLC
Synchronous Data Link Control
SDMA
Spatial Division Multiple Access
SGSN
Serving GPRS Support Node, the gateway between the RNC and the core network in a GPRS/UMTS network
SIM
Subscriber Identity Module, A smart card containing the telephone number of the subscriber, encoded network identification details, the PIN and other user data such as the phone book. A user’s SIM card can be moved from phone to phone as it contains all the key information required to activate the phone
SoHo
Small Office/Home Office
Streaming
An Internet derived expression for the one-way transmission of video and audio content
STK
SIM Toolkit: specified within the GSM standard, this allows operators to add additional functions to the phone menu in order to provide new services such as mobile banking or email
SMR
Specialized Mobile Radio, the US term for private mobile radio (See PMR)
SMS
Short Message Service is a text message service which enables users to send short messages (160 characters) to other users. A very popular service, particularly amongst young people, with 400 billion SMS messages sent worldwide in 2002
SMSC
SMS Centre-the network entity which switches SMS traffic
SMSCB
SMS Cell Broadcast
SMS-MO
SMS Mobile Originated
SMS-MT
SMS Mobile Terminated
SMS-PP
SMS Point to Point
SP
Service Provider
SQAM
Staggered Quadrate Amplitude Modulation
SQPSK
Staggered Quadrate Phase Shift Keying
SS
Supplementary Service Support, handles special services
SS7
Signaling System Number 7 (See CCS7)
SSP
Service Switching Point
STM
Synchronous Transfer Mode
Symbian
A company created by Psion, Nokia, Ericsson and Motorola in 1998 with the aim of developing and standardizing an operating system which enable mobile phones from different manufacturers to exchange information
The operating system is known as EPOC. Matsushita has subsequently joined Symbian
TACS
Total Access Communications System (an AMPS variant deployed in a number of countries principally the UK)
TAP
Transferred Account Procedure, the essential charging methodology for international GSM roaming. There have been four TAP standards, TAP1, TAP2, TAP2+ and TAP3. The latter offers variable record length and is sufficiently flexible to support all future requirements arising from the move to 3G
TBR
Technical Basis for Regulation (part of the ETSI standardization process)
TCH
Traffic Channel
TD-CDMA
Time Division CDMA
TD-SCDMA
Time Division-Synchronous CDMA, a CDMA variant developed by Chinese vendors which is claimed to offer high data rates and greater coverage
TDD
Time Division Duplex is a radio technology for use in unpaired spectrum. WCDMA/UMTS includes a band for TDD mode usage and both PHS and DECT use this technology
TDMA
Time Division Multiple Access is a technique for multiplexing multiple users onto a single channel on a single carrier by splitting the carrier into time slots and allocating these on an as-needed basis
Telematics
A wireless communications system designed for the collection and dissemination of information, particularly refers to vehicle-based electronic systems, vehicle tracking and positioning, on-line vehicle navigation and information systems and emergency assistance
TETRA
Terrestrial Trunked Radio, a European developed digital private mobile radio technology which is now being extensively deployed worldwide
Tetrapol
A competitive digital PMR technology to TETRA developed by French vendors
TFTS
Terrestrial Flight Telephone System
Timeslot
A frame within a TDMA schema, has a time interval of 576 microseconds. Physical content of a timeslot is known as a burst. Five different burst types exist, they are distinguished by different TDMA frame divisions (see NB, FB, SB, AB and DB)
TIPHON
Telecommunications and Internet Protocol Harmonization over Networks, an ETSI project designed to support the market for voice communications and voice band communications. In particular TIPHON will ensure that users on IP-based networks can communicate with those on circuit switched networks
TMN
Telecommunications Management Network
TMSI
Temporary Mobile Subscriber Identity, covers the IMSI to prevent over-the-air interception and tracing
TRAU
Transcoder Rate Adapter Unit, the transport unit for a 16kbit/s traffic channel on the A-bis interface
Tri-band
Refers to a mobile phone able to operate on the three internationally designated GSM frequencies- 900, 1800 and 1900MHz
True Sync
A technology which enables the optimal synchronization of calendars, address books, action lists and memoranda. It enables multi-point, one-step synchronization of wireless and wire line devices, desktop computers and server-based applications and services
TRX
Transmitter/receiver (transceiver)
UI
User Interface
Um
The air interface between the BTS and the MS in a GSM network
Uu
It is en air interface between the Node B and the MS in a UMTS network.
UMTS
Universal Mobile Telecommunications System is the European entrant for 3G, now subsumed into the IMT-2000 family as the WCDMA technology.
UPN
Universal Personal Number
UPT
Universal Personal Telecommunications
URL
Uniform Resource Locator, the addressing system of the Internet
USO
Universal Service Obligation
UTRA
Universal Terrestrial Radio Access is the air interface component of WCDMA.
UTRAN
Universal Terrestrial Radio Access Network, the UMTS radio access network comprising the RNC, Node B and the air interface
USIM
Universal Subscriber Identity Module, the 3G equivalent of the GSM SIM
UWB
Ultra Wide Band
VAS
Value Added Services
VBR
Variable Bit Rate
VHE
Virtual Home Environment
VLR
Visitor Location Register
Vocoder
Voice coder
VoIP
Voice over Internet Protocol
VPN
Virtual Private Network
VSAT
Very Small Aperture Terminal
VSELP
Vector Sum Excited Linear Prediction
WAP
Wireless Application Protocol is a de facto standard for enabling mobile phones to access the Internet and advanced services. Users can access websites and pages which have been converted by the use of WML into stripped-down versions of the original more suitable for the limited display capabilities of mobile phones
WARC
World Administration Radio Conference, an ITU conference held at regular intervals to determine the allocation of spectrum for various services
WCDMA
Wideband CDMA, the technology created from a fusion of proposals to act as the European entrant for the ITU IMT-2000 family
WLL
Wireless Local Loop is a technique for providing telephony and low speed data services to fixed customers using wireless. It is regarded as having considerably potential for rapidly addressing the telecommunications gap in developing countries. A number of different WLL solutions have been marketed based on cellular and cordless technologies
WLAN
Wireless Local Area Network is a short range radio network normally deployed in traffic hotspots such as airport lounges, hotels and restaurants. WLAN enables suitably equipped users to access the fixed network wirelessly, providing high speed access (up to 11Mbit/s download) to distant servers. The key WLAN technologies are the IEEE802.11 family and ETSI HIPERLAN/2
WML
Wireless Markup Language, a markup language developed specifically for wireless applications. WML is based on XML
WQAM
Weighted Quadrate Amplitude Modulation
WWW
World Wide Web
XML
Extended Markup Language
The Consumer Mobile Glossary
Advice of charge:
A service which provides the user with information on the cost of calls from a mobile phone
Airtime:
The amount of time a subscriber spends using his/her mobile phone
Battery
Battery is a chargeable device which provides the mobile phone with power. A variety of battery technologies have been used for mobile phones including nickel cadmium (NiCad), nickel metal hydride (NiMH) and lithium ion (Li-ion)
Battery status:
An indication of the amount of battery life remaining
Call barring:
A service which enables users to bar certain incoming or outgoing calls on their mobile phones
Call timer:
A service which keeps track of the amount of airtime being used by the subscriber on a cumulative basis
Call diverts:
The capability to divert incoming calls to another phone (fixed or mobile) or to an answering service
Call hold:
The ability to put an ongoing call on hold whilst answering or making a second call
Caller ID:
Caller Identification, displays the name/number of the person calling a mobile phone. Also known as CLI
CLI:
See Caller ID
CLR:
Clear, the key on a cellular phone which is pressed to remove information from the display
Dual band:
Mobile phones which support transmission and reception of calls on the 900MHz and 1800MHz bands with seamless handover between the two frequency bands
EFR:
Enhanced Full Rate (codec), an improved version of the standard voice codec used in GSM phones, offers improved speech quality without impacting on network capacity
END Key:
The key on a cellular phone which is pressed to terminate a call
Infrared:
A facility on a mobile phone to allow information to be exchanged with other devices e.g. a PC using infra red technology
Lock:
A function on a cellular phone which, when activated, prevents use of the phone until the user enters a security code
No Service:
An indication on the display of a cellular phone that indicates that the user is in an area where cellular service is unavailable
One-touch dialing:
The ability to dial frequently called numbers using a single key stroke, see Speed Dialing
PCN:
Personal Communications Networks, an outdated term for GSM services in the 1800MHz band
PDA:
Personal Digital Assistant, a sophisticated handheld device with advanced display facilities and a range of business-oriented software programs
Phone book:
A list of personal names and numbers stored in a mobile phone’s internal memory or in the SIM card. These numbers can be called by accessing the appropriate memory and making a single key stroke
PIN:
Personal Identity Number is usually four digits that must be keyed into a mobile phone to make it work. A security measure to prevent unauthorized usage
RCL:
The function on a cellular phone which recalls a phone number from memory
Roaming:
The ability to make and receive calls on the same mobile phone when traveling outside the area of the home network operator
Smart phone:
An advanced combination of mobile phone and personal digital assistant
Speed dialing:
Similar as One-touch dialing
Standby time:
The length of time a battery can power a mobile phone when it is switched on but not making or receiving calls
Talk-time:
The length of time a battery can power a mobile phone when making or receiving calls
Voicemail:
A service offered by network operators whereby calls received when the mobile is in use, switched off or out of coverage can be diverted to an answering service which can be personalized by the user
WAP:
Wireless Application Protocol, a standard whereby mobile phones can gain access to specially tailored Internet websites
WML:
Wireless Markup Language is a specially designed markup language used for tailoring WAP content. WML enables optimum usage of the limited display capabilities of the mobile phone.
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