Source: t-mobil Title: Clarification on the relationship of Teleservices and cs/ps domain Document for



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TSG-SA1 Ad Hoc on Release 2000 S1-IP-00053

Helsinki 29th Feb.– 2nd Mar. 2000




Source: T-Mobil

Title: Clarification on the relationship of Teleservices and CS/PS


Domain

Document for: Discussion

In the SA WG2 Report TR23.922 two option for the implementation of the CS-like Teleservices/realtime services are proposed. Only option 2 will provide the backward compatibility to the existing cs-based voice services and terminals.

Furthermore the definition of the CS and PS domain in TR22.976 is not in line with the understanding of SA WG2 where a teleservice based on a MSC server in an IP network is defined as a CS domain based teleservice.

In order make a clear distinction between these two options and the CS/PS domain, following additions are proposed for TR22.976

3 Definitions and abbreviations

3.1 Definitions


For the purposes of this TR the following definitions apply:

All IP network: an integrated telecommunications network that uses IP for the transport of all user data and signaling data

Editor's note: may need this to elaborate from an IP services point of view (i.e. support of IP addresses and IP clients in the terminal)



Circuit switched (CS) domain: the CS domain comprises all network functionality for provision of bearer and teleservices in a circuit orientated manner, meaning the control protocols (e.g. call handling) are based on circuit switched control protocols (e.g. ISDN/H.324).

Circuit services: the services based on enabled by the circuit switched control protocols domain

Editor's note: CS domain and PS domain may require further elaboration



Emergency call: a mobile originated basic call that terminates at a national or local emergency center. Provision of location information to the emergency center is a mandatory feature in some countries

IP telephony: a voice call that uses IP based protocols (e.g. SIP) and IP for transport of all user data and signalling data.

Multimedia service: a service that handle one or more media simultaneously such as speech (e.g. IP telephony), audio, video and data in a synchronised way from the user's point of view. A multimedia service may involve multiple parties, multiple connections, and the addition or deletion of resources within a single communication session

    Operator specific service: any service offered to a mobile user that is not standardised by the 3GPP specifications

Packet switched domain: the PS domain comprises all network functionality for provision of bearers in a packet orientated manner, meaning the control protocols (e.g. call handling) are based on packet switched control protocols (e.g. SIP/H.323).

Release 99: 3GPP specified release of complete technical specifications for the definition and development of telecommunication services (including both CS and PS services) scheduled for completion in year 1999

Release 2000: 3GPP specified release of complete technical specifications for the definition and development of telecommunication services (including both CS and PS services) and also IP-based multimedia services (as defined in this TR) scheduled to be completed by the end of year 2000

Subscriber: a subscriber is an entity that has a subscription with an operator/service provider for the provisioning of specific services. The subscriber is also responsible for paying the bill for the services utilized

Supplementary service: a supplementary service modifies or supplements a basic telecommunication service (cf. 22.004 [7]

Teleservice: the services identified in 22.003 [6].

User: a user is an entity associated with a subscriber that is capable of using the subscribed services

VoIP: a voice call established over an IP based transport network and IP based on ciruits switched control protocol

4.4 Teleservices and multimedia services


A Release 2000 network may have a circuit domain, a packet domain, or a hybrid network consisting of a circuit domain and packet domain network infrastructure. In addition to teleservices available from Release 99 new services, termed multimedia services, shall be available as part of Release 2000. Multimedia services may also enable enhanced usage and management of teleservices. The relationship between these tele/multimedia services, and the circuit/packet transport domains may be logically depicted as shown in Figure 5.

Figure 5: Teleservices and multimedia services

The logical relationship between the teleservices and multimedia services to the circuit and packet domains is subsequently described.

The “A” relationship refers to the existing relationship between the teleservices and the circuit switched based call handling, circuit switched switching and circuit switched transport (such as existing ISDN telephony).

domains.

The “B” relationship refers to the support of teleservices based on circuit switched control protocol and in a packet switched routing and transportdomain. The same set of end user services may be provided across both the “A” and the “B” relationships. The existence of “B” relationship would be transparent to the end user from both a service capability and a user interface perspective. The “B” relationship could be a path for the evolution of GSM to packet based (IP) networks whereas a backward compatibility to exiting CS-based voice terminals is provided.

Editors note: The definition of circuit and packed domain from S2 is based on the transport/Switching/routing not on the call handling protocols. He “B” relation is therefor identical to the MSC server concept from S2.

Editor's note: to verify from S2 that circuit services may be provided by the PS domain (e.g. offered by MSC servers)

The “C” relationship refers to the relationship between the multimedia services and packet domain. The “C” relationship is not merely the evolution of the 2G services and mobile terminals to the 3G environment, but also represents a new category of services, mobile terminals, services capabilities, and user expectations. Service Providers are not required to provide the existing supplementary services of the “A” and “B” relationships across the “C” relationship, although some comparable services (e.g. emergency services) may be required. Any new multimedia service which may have a similar name or functionality to a comparable standardised service, does not necessarily have to have the same look and feel from the user's perspective of the standardised service. However, the “C” relationship shall provide sufficient capabilities to allow a Service Provider to develop and implement Release 2000 versions of these services that would have the same user inteface and quality of service to the end user. Voice communications is one, but not the only, real-time multimedia service that would be provided across the “C” relationship.

The “D” relationship refers to the relationship between the multimedia services and circuit domain (e.g. H.324 supported in Release 99).



The “E” relationship refers to the relationship of the existing teleservices (incl. existing supplementary services) based on new packed switched control protocols, routing and transport (e.g. the re-implementation of 22.002, 22.003 and 22.04 based on IP protocols). This is not envisaged within R’00.
Каталог: tsg sa -> WG1 Serv
tsg sa -> 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Telecommunication management; Inventory Management (IM) Network Resource Model
tsg sa -> 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Telecommunication management; Performance Management (PM)
tsg sa -> Release: Rel-5 Work Item: Source
tsg sa -> Source: Vodafone [sa 2] To: ct 1, ct 4, sa 3 Contact Person
tsg sa -> 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Telecommunication management; Configuration Management (CM); Transport Network (TN) interface Network Resource Model (nrm) Integration Reference Point
tsg sa -> Sophia Antipolis, 25 may-1999
tsg sa -> SA3#50 Proposed Doc order for gaa 1 tr 33. 919 Gaa 2 ts 33. 220 Gba
WG1 Serv -> Disclaimer: This tr is an ad-hoc draft, and subject to modification. The Tr has yet to be presented to, or be accepted by, tsg-s1
tsg sa -> Participants list meeting : 3gppsa4-Video Codec Lund, 28 30 October 2 003


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