TSG-T2
Yokohama, JP, 19-21 April 1999	TSGT2#3(99)438

Agenda Item:	SWG6 (General Features)

Source:	NTT DoCoMo, Sharp

Title:	Proposed LS on service capabilities

Document for:	Discussion / Decision

Proposed Liaison Statement to TSG-SA and TSG-S1

Source:	TSG-T2 (Services & Capabilities)

Liaison To:	TSG-S1

CC:	TSG-SA

Title:	Identification of services capabilities

1.	 Introduction

TSG-T2 requested TSG-S1 to identify the service capabilities. But T2 are still waiting the LS answer from S1. During this meeting, T2 was noticed that the service capabilities could be proposed from the terminal perspective by the answer from the chairman of S1(Tdoc T2-99398). But it is clear that S1 is responsible for this work. S1 is asked to investigate the proposed identification of service capabilities and send back the final identification for Release 99.

Proposed identification of service capabilities

The identification of service capabilities from the terminal perspectives is proposed in the y-axis of Annex A. According to the identification, service implementation capabilities for each technical domain should be considered.

The primary intention of this identification for service capabilities is to clarify the service capability related with the service implementation capabilities that have an impact on the completion of specifications and the test conformances, and the implementation of terminals. As a result, this identification is more dependent on or closer to the radio interfaces such as the type of bearers and its speed which affect on especially hardware implementation. In other words, it is proposed that services from the application like higher layers than IP should be out of its scope. If we would consider application layers over IP, there would be too many possibilities to be listed up and investigated within 3GPP. But it is proposed that the speed of data should be specified in this work, as it has an impact on RF parameters in particular.

There may be differences of viewpoints for service capabilities between TSG-S1 and TSG-T2. TSG-S1 has considered and investigated services from the application perspective if anything. On the other hand, it is required that service capabilities should be overviewed from the layers close to radio which has an impact on the implementation, especially hardware of terminals, for the identification of terminal capabilities. But there is no contradiction in these two approaches, as the same service capabilities are identified from the top of them by S1 and from the bottom by T2. So it has no effect on the outputs which has been or will be delivered from S1.

3.	The requested consideration on service capabilities

TSG-S1 are asked to consider the service requirements that should permit the free combination of service capabilities for terminal implementation. The primary principle of UMTS is to deliver a wide variety of services and a wide range of terminals. From the terminal perspective, all services should be optional at least for terminals. It is requested that certain service capability or combinations of them should be implemented on terminals without any restriction by their selection of manufactures, operators and requests from users.

Annex A.  Correspondence of service implementation capabilities to each technical domain 
                                                  according to the identification of service capabilities

Technical domain
Capability	RF parameter	Radio Layer 1 	Radio Layer 2	Radio Layer 3	Codec	
	Mandate	Option	Mandate	Option	Mandate	Option	Mandate	Option	Mandate	Option	
Services Capabilities	Service implementation capabilities	
Circuit switched data	Speech											
	Audio Video											
	Non-transparent 	14.4K FAX											
		14.4K Modem											
		28.8K Modem											
		33.6K Modem											
		64K											
	UD 64K											
Packet switched data	Point-to-point 
Uplink	64K											
		128K											
		384K											
	Point-to-point Downlink	64K											
		128K											
		384K											
SMS	Point-to-point											
	Cell broadcast											
Supplementary services												

•	Note
-	S1 is asked to investigate and identify service capabilities in the y-axis of the above table.
-	Each technical domain, i.e. RF parameter, Layer 1-3 and Codec, are listed on the x-axis as examples to clarify the correspondence between service capabilities and service implementation capabilities which will be identified by other appropriate WGs. 
-	For non-transparent circuit switched data, “modem” means data communication interworked with PSTN, and 64.4k is needed to interwork with ISDN.
-	The above-mentioned speed of data is correspondent to general capabilities of PSTN and ISDN. Further studied will be required.
-	For packet switched data, the speed of uplink and downlink is proposed to combine independently.