This TS defines the stage one description of the General Packet Radio Service (GPRS). Stage one is an overall service description, primarily from the service subscriber's and user's points of view, but does not deal with the details of the human interface itself. This TS includes information applicable to network operators, service providers and terminal, switch and data base manufacturers.
This TS contains the core requirements for the packet switched networks specified by 3GPP which are sufficient to provide a complete service. It defines a set of bearer services that provide packet mode transmission within the PLMN and interwork with external networks.
The term GPRS shall be used in this document to refer the GPRS service offered via GERAN and UTRAN and the PS Domain of the 3G PLMN.
The GPRS shall not prevent the user's operation of other 3GPP services.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
For the purposes of this 3GPP TS the following definitions apply:
The value of elapsed time between an access request and a successful access (source: ITU-T X.140).
A performance criterion that describes the degree of correctness with which a function is performed. (The function may or may not be performed with the desired speed.) (source: ITU-T I.350).
A type of telecommunication service that provides the capability for the transmission of signals between user-network interfaces (source: ITU-T I.112).
An interactive service which provides for bi-directional communication by means of real-time (no store-and-forward) end-to-end information transfer from user to user (source: ITU-T I.113).
Entity to which calls to the General Packet Radio Service (GPRS) are directed.
A service which provides the means for bi-directional exchange of information between users. Interactive services are divided into three classes of services: conversational services, messaging services and retrieval services (source: ITU-T I.113).
The common boundary between two associated systems (source: ITU-T I.112).
mean bit rate:
A measure of throughput. The average (mean) bit rate available to the user for the given period of time (source: ITU-T I.210).
An interactive service which offers user-to-user communication between individual users via storage units with store-and-forward, mailbox and/or message handling, (e.g., information editing, processing and conversion) functions (source: ITU-T I.113).
The part of the UE which terminates the radio transmission to and from the network and adapts terminal equipment capabilities to those of the radio transmission multicast service: A unidirectional PTM service in which a message is transmitted from a single source entity to multiple destinations.
A value of the service attribute "communication configuration", which denotes that the communication involves more than two network terminations (source: ITU-T I.113).
Entity which provides the network operating elements and resources for the execution of the General Packet Radio Service (GPRS).
network service data unit (NSDU):
A unit of data passed between the user and the GPRS network across a Network Service Access Point (NSAP).
A functional group on the network side of a user-network interface (source: ITU-T I.112).
An information unit identified by a label at layer 3 of the OSI reference model (source: ITU-T I.113). A network protocol data unit (NPDU).
packet data protocol (PDP):
Any protocol which transmits data as discrete units known as packets, e.g., IP.
packet transfer mode:
Also known as packet mode. A transfer mode in which the transmission and switching functions are achieved by packet oriented techniques, so as to dynamically share network transmission and switching resources between a multiplicity of connections (source: ITU-T I.113).
Public Land Mobile Network operator. The entity which offers a GPRS.
point-to-multipoint (PTM) service:
A service type in which data is sent to "all service subscribers or a pre-defined subset of all subscribers" within an area defined by the Service Requester.
A value of the service attribute "communication configuration", which denotes that the communication involves only two network terminations.
point-to-point (PTP) service:
A service type in which data is sent from a single network termination to another network termination.
A formal set of procedures that are adopted to ensure communication between two or more functions within the within the same layer of a hierarchy of functions (source: ITU-T I.112).
protocol data unit (PDU):
In the reference model for OSI, a unit of data specified in an (N)-protocol layer and consisting of (N)-protocol control information and possibly (N)-user data (source: ITU-T X.200 / ISO-IEC 7498-1).
service type which delivers information (data/multimedia) initiated from a network (which may be external to the PLMN) to the UE. The service will cause a PDP context to be activated if needed.
quality of service:
The collective effect of service performances which determine the degree of satisfaction of a user of the service (ITU-T E.800). The set of performance parameters that can be directly observed and measured at the point at which the service is accessed by the user. There are three criteria by which performance is measured: speed, accuracy and dependability (source: ITU-T I.350).
A combination of functional groups and reference points that shows possible network arrangements (source: ITU-T I.112).
A conceptual point at the conjunction of two non-overlapping functional groups (source: ITU-T I.112).
An interactive service which provides the capability of accessing information stored in data base centres. The information will be sent to the user on demand only. The information is retrieved on an individual basis, i.e., the time at which an information sequence is to start is under the control of the user (source ITU-T I.113).
A specified characteristic of a telecommunication service (source: ITU-T I.112).
service data unit (SDU):
In the reference model for OSI, an amount of information whose identity is preserved when transferred between peer (N+1)-layer entities and which is not interpreted by the supporting (N)-layer entities (source: ITU-T X.200 / ISO-IEC 7498-1).
The time elapsed from the invocation of the service request, to the corresponding service request indication at the Service Receiver, indicating the arrival of application data.
Entity which offers the General Packet Radio Service (GPRS) for subscription. The network operator may be the service provider.
The entity which receives the service request indication primitive, containing the SDU.
This is defined as being one invocation of the service through a service request primitive.
The entity which requests the initiation of a GPRS operation, through a service request.
Entity which subscribes to the General Packet Radio Service (GPRS) service.
A performance criterion that describes the time interval required to perform a function or the rate at which the function is performed. (The function may or may not be performed with the desired accuracy.) (source: ITU-T I.350).
A parameter describing service speed. The number of data bits successfully transferred in one direction between specified reference points per unit time (source: ITU-T I.113).
A parameter describing service speed. The time difference between the instant at which the first bit of a protocol data unit (PDU) crosses one designated boundary (reference point), and the instant at which the last bit of the PDU crosses a second designated boundary (source: ITU-T I.113).
variable bit rate service:
A type of telecommunication service characterised by a service bit rate specified by statistically expressed parameters which allow the bit rate to vary within defined limits (source: ITU-T I.113).
The GPRS allows the service subscriber to send and receive data in an end-to-end packet transfer mode, without utilizing network resources in circuit switched mode.
GPRS enables the cost effective and efficient use of network resources for packet mode data applications e.g. for applications that exhibit one or more of the following characteristics:
intermittent, non-periodic (i.e., bursty) data transmissions, where the time between successive transmissions greatly exceeds the average transfer delay;
frequent transmissions of small volumes of data, for example transactions consisting of less than 500 octets of data occurring at a rate of up to several transactions per minute;
infrequent transmission of larger volumes of data, for example transactions consisting of several kilobytes of data occurring at a rate of up to several transactions per hour.
Within the GPRS, two different bearer service types are defined. These are:
Based on standardized network protocols supported by the GPRS bearer services, a GPRS network administration may offer (or support) a set of additional services. This is outside the scope of this specification, however, a number of possible PTP interactive teleservices include:
retrieval services which provide the capability of accessing information stored in data base centres. The information is sent to the user on demand only. An example of one such service in the Internet's World Wide Web (WWW);
messaging services which offer user-to-user communication between individual users via storage units with store-and-forward mailbox, and/or message handling (e.g., information editing, processing and conversion) functions;
conversational services which provide bi-directional communication by means of real-time (no store-and-forward) end-to-end information transfer from user to user. An example of such a service is the Internet's Telnet application;
tele-action services which are characterized by low data-volume (short) transactions, for example credit card validations, lottery transactions, utility meter readings and electronic monitoring and surveillance systems.
Some examples of teleservices which may be supported by a PTM bearer service include:
distribution services which are characterized by the unidirectional flow of information from a given point in the network to other (multiple) locations. Examples may include news, weather and traffic reports, as well as product or service advertisements;
dispatching services which are characterized by the bi-directional flow of information from a given point in the network (dispatcher) and other (multiple) users. Examples include taxi and public utility fleet services;
conferencing services which provide multi-directional communication by means of real-time (no store-and-forward) information transfer between multiple users.
Some examples of teleservices which may be supported by either PTP or PTM bearers include:
user subscribed services where a priori agreement is made for delivery of data to a user, such as stock quotes, sports results, specific product or service advertisements, and email.
EGPRS is an enhancement of GPRS for GERAN allowing higher data rates on the radio interface. The same set of services provided by GPRS is available in EGPRS.
HSDPA is an enhancement to Packet data services for UTRAN allowing higher data rates on the radio interface downlink. The same set of services provided by GPRS is available with GPRS using HSDPA.