3GPP TSG-T2 SWG5#1
Malmö, Sweden, 28-30 July 1999	TSGT2MT#1(99)007	

Agenda Item:	4

Source:	Telia AB

Title:	Terminal classes in alignment with GPRS

Document for:	Approval

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As the UTRAN most likely will be connected to GPRS backbone and UMTS-terminals combined with GSM (including GPRS) most probably will be the first type of terminal existing at the market, it might be sufficient to keep the types of multi-mode terminals, defined in our report, in alignment with what is specified in GPRS. In most places where multi-mode functionality is discussed this is how they relate today.

The definition of the GPRS mobile classes can be found in GSM 02.60 (v 6.1.1, also called EN 301 113) and in the annex to this input.

As agreed on the e-mail list the terminal types for this report should be in line with the GPRS MS classes. This is the suggestion of text to be included in the report “Multi-mode issues”. The differences from the current text are:
•	The naming of the terminal types. The most advanced type of terminal is named “I” and the least advanced type of terminal is named “III”.
•	GPRS has five states (attach, activation, monitor, invocation and traffic) and these states are valid even for multi-mode/system terminals. Two states can be discussed and those are activation, which considers activation of a subscriber profile, and monitor, which means that the present level of QoS can be shown. 
•	In all types, the wordings of modes and systems are included, according to the definition applied for multi-mode/system terminals.

4.1	Types of Terminals 
In different situations, it is feasible to study the services considering different types of terminals. From a user and operator/service provider perspective it is also important that different types of terminals exist so that customers can be offered a great variety of services through the terminals.
4.1.1	Type I
Terminals of type I can camp on cells in several modes/systems at the same time and also be in active communication in several modes/systems at the same time. No switching between modes/systems is necessary.
This implies that simultaneous attach, simultaneous activation, simultaneous monitoring, simultaneous invocation and simultaneous traffic is supported.
With this type of terminal several RF-parts must be used for the different modes/systems.
4.1.2	Type II
Type II terminals can camp on different cells in several modes/systems at the same time but active communication is only possible in on mode/system. The camping could be done either simultaneously or virtually simultaneously, by e.g. time multiplexing. When in active communication, only pagings in the active mode/system can reach the terminal. The terminal can also be registered in several modes/systems at the same time (may be applied when the systems/modes are belonging to different operators/service providers). The switching between modes/systems is done automatically.
The above description implies that simultaneous attach, simultaneous activation and simultaneous monitoring is supported. No simultaneous traffic is supported but the terminal can initiate/receive connections in different modes/systems sequentially. 
With this type of terminal it could be possible to use just one or several RF-parts for the different modes/systems.
4.1.3	Type III
This type of terminal can be described as two or more terminals merged together into one shell. The MMI for the different modes are the same but no other functions are shared between the different modes of the terminal. This also implies that the terminal can camp on one cell and be active in only one mode/system at the same time. Switching between modes/systems is done automatically. With this type of terminal it is not possible to have seamless handover between modes/systems.
No simultaneous activity is supported with this type of terminal.
With this type of terminal it could be possible to just use one RF-part to the different modes/systems.

Annex

Source: GSM 02.60 v 6.1.1

5.4.5 Capabilities of GPRS MS Classes
The purpose of the definition of the GPRS MS Classes is to enable the different needs of the various market segments to be satisfied by a number of MS types with distinct capabilities (e.g., simultaneous use and number of time-slots) . A means shall be provided to indicate the multi-slot capability and current configuration to the network when necessary.

Three GPRS MS classes are identified:

The term simultaneous (attach, traffic, etc.) is the requirement to simultaneously support GSM GPRS services and GSM circuit switched services including SMS.

Class A: 
Supports simultaneous attach, simultaneous activation, simultaneous monitor, simultaneous invocation and simultaneous traffic. The mobile user can make and/or receive calls on the two services simultaneously subject to the QoS requirements.

A minimum of one time slot shall be available for each type of service (circuit switched and GPRS)
when required.

Class B: 
Supports simultaneous attach, simultaneous activation and simultaneous monitor. Supports only
limited simultaneous invocation: GPRS virtual circuits (GPRS-activation) shall not be cleared down due to invocation or traffic of circuit switched services, the status of the GPRS virtual connection is then "busy or held". Simultaneous traffic shall not be supported. The mobile user can make and/or receive calls on either of the two services sequentially but not simultaneously. The selection of the appropriate service is performed automatically.

Class C: 
Supports only non-simultaneous attach. Alternate use only. If both services (GPRS and Circuit Switched) are supported then a Class C MS can make and/or receive calls only from the manually or default selected service, i.e., either GPRS or Circuit Switched service. The status of the service which has not been selected is detached i.e., not reachable. The capability for GPRS-attached class-C MSs to receive and transmit SMS messages is optional.

The network shall support SMS message reception and transmission for GPRS-attached class-C
MSs.

An MS may be reconfigured. E.g., a class A MS configured as 1 slot for circuit switched plus 1 slot for GPRS may be reconfigured as a class C configured as 0 slots for circuit switched plus 2 slots for GPRS.

Non-voice only MSs do not have to (but may) support emergency calls.