1、 TECHNICAL REPORT ATIS-1000057 SERVICE REQUIREMENTS FOR EMERGENCY TELECOMMUNICATIONS SERVICE (ETS) IN NEXT GENERATION NETWORK (NGN) As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industrys most-pressing business priori
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11、nd allocation of network resources (including bearer resources) in origination, termination, and transit networks, including wireless handoffs; 3. Transport of signaling and media packets; 4. Priority processing within FEs; and 5. Processing of the Service Users release of an NS/EP NGN-PS service se
12、ssion. Network Interconnection and Protocol Interworking: A Service Users NS/EP NGN-PS invocation and session establishment involves transport and processing, and the end-to-end signaling and media path may traverse multiple Service Provider networks. A Service User may select either or both of two
13、service enrollment mechanisms: 1) NGN-PS Credentials (e.g., PIN); or 2) Service Provider subscription. These approaches differ in their accounting, as well as in the calling privileges provided to the Service User. The NGN-PS Credentials (e.g., PIN) approach assigns the user a unique 12 digit number
14、 intended to be kept secure by the user. The Service Provider subscription approach authorizes the user to subscribe to NS/EP NGN-PS as offered by a government-approved Service Provider. In this approach, the user is assumed to have an existing (or to enter into a) service arrangement with the Servi
15、ce Provider for non-NS/EP NGN-PS service as part of meeting other needs independent of NS/EP NGN-PS. The Service Provider offers NS/EP NGN-PS subscription as a feature addition to the users basic service arrangement. When invoked on a call/session, NS/EP NGN-PS service provides an NS/EP NGN-PS call/
16、session priority treatment as specified in this TR. However, the basic call/session privileges and features available to the user are determined by the users non-NS/EP NGN-PS service arrangement with the Service Provider. Some NS/EP NGN-PS invocation scenarios may involve initial NS/EP NGN-PS call/s
17、ession authorization by subscription, and then subsequent authorization by Credentials. In such cases, calling privileges after Credentials authorization are determined by the authorized NGN-PS Credentials database calling privileges (versus the subscription calling privileges) in progressing the NS
18、/EP NGN-PS call/session. In addition, the NGN-PS Credentials database calling privileges include some unique NS/EP NGN-PS capabilities/features that are not present in conventional subscription services. ATIS-1000057 7 6 NS/EP NGN-PS Overview The NS/EP NGN-PS services addressed in this TR are: NS/EP
19、 NGN-PS Voice; NS/EP NGN-PS Video; NS/EP NGN-PS Guaranteed Bit Rate (GBR) Data; and NS/EP NGN-PS Data Transport (non-GBR). These services are for Voice-Band Service (NS/EP NGN-PS Voice) and Broadband Service (NS/EP NGN-PS Video, NS/EP NGN-PS GBR Data, and NS/EP NGN-PS Data Transport). A Service User
20、 may subscribe with a Service Provider for any combination of one or more services from the NS/EP NGN-PS services set, provided the Service User has a subscription with the Service Provider for the corresponding public service(s). Similarly, a Service User may access any NS/EP NGN-PS service for whi
21、ch he is authorized by the government from any normal public user device that is associated with a normal user subscription for the corresponding public service, even if the UE has no associated NS/EP NGN-PS subscription with the Service Provider, provided the Service User uses the proper government
22、-assigned credentials when invoking the service. The Service Users priority level assigned by the government applies for all NS/EP NGN-PS services authorized for the Service User. The NS/EP NGN-PS Voice service provides continuity to the Legacy GETS and WPS services through the industry NGN transiti
23、on. NS/EP NGN-PS Video and NS/EP NGN-PS GBR Data services are specified based on the same session-oriented IMS-based Core Network reference architecture used for NS/EP NGN-PS Voice, including similar signaling. However, NS/EP NGN-PS Video includes audio and video components that may involve very dif
24、ferent network bandwidth and performance requirements from NS/EP NGN-PS Voice, and may be used in different modes from those generally thought of for voice e.g., two-way audio conversations with two-way video, or two-way audio conversations with one-way video. NS/EP NGN-PS Video service can become p
25、art of a priority video conferencing service offered by a Service Provider. NS/EP NGN-PS Data Transport and NS/EP NGN-PS GBR Data are first within a broader family of NS/EP NGN-PS data services. Other possible NS/EP NGN-PS data services include: NS/EP NGN-PS Web Service, NS/EP NGN-PS File Transfer,
26、NS/EP NGN-PS Email, NS/EP NGN-PS Short Message Service (SMS) over IP, and NS/EP NGN-PS Instant Messaging (IM). The scope of this TR is limited to support for the NS/EP NGN-PS Voice, NS/EP NGN-PS Video, NS/EP NGN-PS GBR Data, and NS/EP NGN-PS Data Transport services. NS/EP NGN-PS Data Transport and N
27、S/EP NGN-PS GBR Data services differ from the other NS/EP NGN-PS data services above in that they provide priority treatment for data transport of the users UE data within one or more Service Provider networks. The other NS/EP NGN-PS data services provide priority treatment for the corresponding dat
28、a application processing, as well as priority treatment for the transport of the corresponding data packets. NS/EP NGN-PS Data Transport service may provide priority transport to all the packets of all non-GBR data applications used by the Service User, or it may be limited in some way (e.g., suppor
29、ts only particular applications or transport to particular destinations). Note that NS/EP NGN-PS Data Transport and NS/EP NGN-PS GBR Data service are the same as all the other NS/EP NGN-PS services in their need for call/session establishment to be given priority treatment in signaling and processin
30、g. NS/EP NGN-PS Data Transport may differ from the other services in its use of an explicit Service User cancellation (i.e., NS/EP NGN-PS Data Transport revocation) action to stop priority treatment without releasing the underlying public data transport service. In contrast, release of an NS/EP NGN-
31、PS GBR Data session will release the priority treatment as well as the underlying data transport. In addition, due to the need to further clarify and specify the use cases by the NS/EP users for the priority video and data services, this TR assumes very basic point-to-point NS/EP NGN-PS Video and NS
32、/EP NGN-PS GBR Data services. Similarly, the Service Providers will also have to specify in some ATIS-1000057 8 detail their corresponding public services. In the future, these basic priority video and data services can be part of a more complex set of services offered by the Service Providers. As a
33、n example of data transport, using a web browser to access a private agency server during network congestion might be more responsive with NS/EP NGN-PS Data Transport service than without. Similarly, using a web browser to access a public server during network congestion may have some performance im
34、provement, but overall delay performance will be affected by possible congestion in the application server, which is not mitigated by the priority of NS/EP NGN-PS Data Transport service. NS/EP NGN-PS Data Transport service in this TR gives priority for data transport that does not have a GBR commitm
35、ent, while NS/EP NGN-PS GBR Data service in this TR gives priority for data transport that does have a GBR commitment. This TR focuses on the Core Network requirements for NS/EP NGN-PS. This TR supports an NS/EP NGN-PS session initiated from, or terminated to, IP-based customer equipment via the Acc
36、ess Network. This TR does support interconnection to the PSTN for priority voice services via interworking network elements supporting NS/EP NGN-PS capabilities. The scope of this TR includes priority for NS/EP NGN-PS service requests when originated from any UE, whether or not the UE is associated
37、with an NS/EP NGN-PS subscription with the Service Provider (i.e., has Subscription Credentials). The Service User may be authorized for Legacy GETS and NS/EP NGN-PS with assigned NGN-PS Credentials (e.g., a Personal Identification Number, or PIN) by the government without having an NS/EP NGN-PS sub
38、scription with a particular Service Provider or a UE equipped with Subscription Credentials. However, priority treatment of service requests originated using Subscription Credentials may be different from service requests originated using only NGN-PS Credentials. In particular, Subscription Credenti
39、als may enable pre-invocation priority signaling, whereas NGN-PS Credentials may require recognition of the invocation before applying any priority. 7 Service Descriptions This section provides a service description of NS/EP NGN-PS Voice, Video, GBR Data, and Data Transport services from a Service U
40、ser and Service Provider perspective for both normal and exception situations. 7.1 NS/EP NGN-PS Voice 7.1.1 Overview This TR specifies three methods for a Service User to invoke NS/EP NGN-PS Voice service on a Service Provider network. Two of the methods are Credentials-based using a GETS-AN or a GE
41、TS-NT. The other method is subscription-based using a GETS-FC. All three methods invoke NS/EP NGN-PS Voice on a per call/session basis. A GETS-AN or GETS-NT invoked call/session can be initiated from any UE that can make a basic voice call/session. A GETS-FC invoked call/session can be initiated fro
42、m a voice-capable UE with a user subscription for GETS-FC. In the case of a mobile UE when roaming, the registration may be through a visited Service Provider. The UE service profile is stored in the home Service Provider network and includes the subscription for NS/EP NGN-PS. For fixed wireline net
43、works, the originating Service Provider network is the home Service Provider network. When a mobile UE originates a GETS-FC invoked call/session in a visited network, end-to-end priority treatment may depend on the visited network recognizing the GETS-FC invocation and providing priority treatment,
44、and corresponding contractual agreements between the visited and home network Service Providers. When a Service User initiates an NS/EP NGN-PS Voice call/session using GETS-AN, the Service Provider network identifies the call/session request as an NS/EP NGN-PS call/session request based on the prese
45、nce of the GETS-AN in the call/session request. The calling user is prompted by the Service Provider network for entry of a PIN for user authorization for NS/EP NGN-PS Voice service. After successful authorization, the Service User is prompted for entry of a Directory Number (DN) for routing of the
46、NS/EP NGN-PS call/session to the desired destination. Subject to the Service Users calling privileges, the DN may be an NANP number, an E.164 international number, a GETS-NT, or a GETS-PDN. The GETS-NT can also be directly dialed to invoke GETS, as described in the following paragraph. However, a GE
47、TS-PDN can only be used as a DN in a GETS-AN invocation. Some or all of these functions may be provided by another Service Provider or an authorized third party. ATIS-1000057 9 When a Service User initiates an NS/EP NGN-PS Voice call/session using a GETS-NT, the Service Provider network identifies t
48、he call/session request as an NS/EP NGN-PS call/session request based on the presence of the GETS-NT in the call/session request. The calling user is prompted by the Service Provider network for entry of a PIN for user authorization for NS/EP NGN-PS Voice service. (The PIN collection/authorization c
49、an be omitted under certain circumstances.) After successful authorization and translation of the GETS-NT, the NS/EP NGN-PS call/session is routed to the desired destination. When a Service User initiates an NS/EP NGN-PS Voice call/session using GETS-FC followed by a DN, the Service Provider network identifies the call/session request as an NS/EP NGN-PS call/session request based on the presence of the GETS-FC. The home Service Provider network authorizes the call/session request as an NS/EP NGN-PS call/session request if the users service profile associated wi
