9 UMTS Core Network

22.1003GPPTSUMTS Phase 1

NOTE 1: The term performance refers in this clause to the resource level usage and reliability of the UMTS core network.

NOTE 2: It is not required for phase 1 UMTS core networks to support calls with multiple connections. Multiple connections for a single mobile could be realised through several calls.

In the first phase of UMTS, the UMTS core network capabilities are a superset of the phase 2+ Release ‘99 GSM core network capabilities. The additional requirements for the phase 1 UMTS core network are the following:

1) The phase 1 UMTS core network shall support circuit switched data service capability of at least 64 kbit/s per user. This shall not limit the user from choosing lower data rates.

2) The phase 1 UMTS core network shall support packet switched data service capabilities of at least 2 Mbit/s peak bit rate per user. This shall not limit the user from choosing lower data rates.

3) The phase 1 UMTS core network shall enable set-up, re-negotiation and clearing of connections (i.e. CS calls or PS sessions) with a range of traffic and performance characteristics. The re-negotiation of QoS attributes/bearer may be caused by an application or the user via an application (see UTRAN capability section). It shall be possible to apply traffic policing (e.g. connection admission control, flow control, usage parameter control…) on a connection during its set-up and lifetime.

4) The phase 1 UMTS core network shall support a range of traffic and performance characteristics for connectionless (e.g. unicast, broadcast, and multicast) traffic.

5) The range of traffic and performance characteristics that shall be supported by the phase 1 UMTS core network shall be at least those of GPRS phase 2+ Release ‘99. This means that the support of the full set of bearer services defined in TS 22.105 is not required for the phase 1 UMTS core network.

6) Established bearers shall not prevent the set-up of a new bearer. These new bearers can be of any type (e.g. PS, CS). It is nevertheless expected that the terminal and network capabilities will put some limitations on the number of bearer services that can be handled simultaneously. It shall be possible for each bearer to have independent traffic and performance characteristics.

7) In order to facilitate the development of new applications, it shall be possible to address applications to/from a phase 1 UMTS mobile termination (e.g. the notion of Internet port).

8) Operator specific services based on the VHE concept shall be supported by the phase 1 UMTS core network. This functionality could be provided through available toolkits (such as CAMEL, MExE, WAP and SIM Toolkit).

9) If UMTS authentication is invoked while a user has services active, the authentication shall not degrade the user services.

10) The phase 1 UMTS core network shall support the generation of standardised charging records based upon parameters such as the dialled number, call duration, traffic (volume, bit rate) and perceived Quality of Service provided to the user.

11) The phase 1 UMTS core network shall support on-line billing. Billing of 3rd party value added services with the concept of one-stop-billing shall be supported by the phase 1 UMTS core network through standardised procedures.

12) The phase 1 UMTS core network shall support both bilateral and (possibly via 3rd party) automatic roaming procedures to UMTS networks with improved security as defined by SMG10.

13) The phase 1 UMTS core network shall support interworking with PSTN, N-ISDN, GSM, X.25 and IP networks with their respective numbering schemes.

14) It shall be possible for the standardised classes of phase 1 UMTS mobile terminals supporting the GSM BSS and UTRAN radio interfaces to roam in GSM networks and receive GSM services.

15) Standardised protocols shall be defined for the operation, administration and maintenance of the UMTS phase 1 core network in cooperation with ETSI TMN.

16) The USIM requirements defined for later releases of UMTS should be taken into account in the design of the phase 1 UMTS core network.

17) Phase 1 UMTS core network shall provide an effective solution of inter-network traffic and signalling in case of global roaming.

18) Phase 1 UMTS core network shall support facilities for monitoring and measurement of traffic flows and characteristics within the network eg for congestion control.

19) Phase 1 UMTS core network shall support single and multiple numbering schemes described in 22.101

20) The phase 1 UMTS core network shall, as an option, support IP mobility between different environments such as fixed and mobile, public and private and between different public systems