ETSI TR 182 026-2009 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) Impact of mobility for access-technology independent networks.pdf

1、 ETSI TR 182 026 V3.1.1 (2009-09)Technical Report Telecommunications and Internet converged Services andProtocols for Advanced Networking (TISPAN);Impact of mobility for access-technology independentnetworks in the TISPAN NGN architectureETSI ETSI TR 182 026 V3.1.1 (2009-09) 2Reference DTR/TISPAN-02

2、069-NGN-R3 Keywords mobility ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies

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6、 authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered f

7、or the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Tra

8、de Marks registered and owned by the GSM Association. ETSI ETSI TR 182 026 V3.1.1 (2009-09) 3Contents Intellectual Property Rights 4g3Foreword . 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbre

9、viations . 6g34 Overview of Mobility in NGN . 7g34.1 SIP-based mobility and MIP-based mobility 7g35 Mobility Scenarios in NGN 7g35.1 Intra-AN Mobility Scenarios 8g35.2 Inter-AN Mobility Scenarios 9g35.2.1 Inter-AN Mobility Scenarios between same type of access networks 10g35.2.2 Inter-AN Mobility Sc

10、enarios between different types of access networks . 10g35.3 Inter-CN Mobility Scenarios 11g35.3.1 Scenario G: Mobility between WiMax Core Networks owned by different NGN Operators . 11g36 Mobility control and management considerations for NGN 11g36.1 Moving Object 11g36.2 Moving Qualities 12g36.3 M

11、oving Level . 13g37 Mobility Impacts on TISPAN NGN . 13g37.1 Mobility Impacts on NGN Requirements (Stage 1) . 14g37.2 Mobility Impacts on NGN Architecture (Stage 2) . 14g37.2.1 Mobility Impacts on NASS . 14g37.2.2 Mobility Impacts on RACS 15g37.2.3 Mobility Impacts on other Subsystems . 16g37.3 Mobi

12、lity Impacts on NGN Protocols (Stage 3) 16g37.4 Mobility Impacts on NGN Security 16g37.5 Mobility Impacts on NGN Management 16g37.6 Mobility Impacts on NGN NNA 16g37.7 Mobility Impacts on NGN CPN . 16g38 General Conclusions. 16g3History 17g3ETSI ETSI TR 182 026 V3.1.1 (2009-09) 4Intellectual Propert

13、y Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Esse

14、ntial, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has

15、 been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Techn

16、ical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). ETSI ETSI TR 182 026 V3.1.1 (2009-09) 51 Scope The present document identifies TISPAN NGN mobility scenarios and the impact of mobility between access-technology independent networks. Th

17、e main impact of these scenarios is expected to be on the NASS and RACS architectures, but does not preclude other impacts within the TISPAN NGN architecture. The present document may also recommend a way forward to support these scenarios; however, it may also conclude that no further work in TISPA

18、N is required. The present document is expected to be access-technology independent and as such will require coordination of the TISPAN work with external SDOs and Fora such as 3GPP, ITU-T, ECMA, and the WiMAX Forum. 2 References References are either specific (identified by date of publication and/

19、or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes

20、of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were v

21、alid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edi

22、tion of the referenced document (including any amendments) applies. Not applicable. 2.2 Informative references i.1 ETSI ES 282 001: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Functional Architecture“. i.2 ITU-T Recommendation Q.1706/Y.2801

23、: “Mobility management requirements for NGN“. i.3 ETSI ES 282 004: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Functional Architecture; Network Attachment Sub-System (NASS)“. i.4 ETSI ES 282 003: “Telecommunications and Internet converged S

24、ervices and Protocols for Advanced Networking (TISPAN); Resource and Admission Control Sub-System (RACS): Functional Architecture“. ETSI ETSI TR 182 026 V3.1.1 (2009-09) 63 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions app

25、ly: access network: collection of network entities and interfaces that provide the underlying IP transport connectivity between end user devices and NGN entities NOTE: See ES 282 001 i.1. core network: portion of the delivery system composed of networks, systems equipment and infrastructures, connec

26、ting the service providers to the access network NOTE: See ES 282 001 i.1. handover: ability to provide service with some impact on their service level agreements to a moving object during and after movement NOTE: This may include a session break and resume, or a certain degree of service interrupti

27、on or loss of data while changing to the new access point. See ITU-T Recommendation Q.1706/Y.2801 i.2. MIP-based mobility: approach for service continuity in NGN which is implemented in network layer using MIP nomadism: ability of the user to change his network access point on moving; when changing

28、the network access point, the users service session is completely stopped and then started again, i.e. there is no session continuity or handover possible NOTE: It is assumed that normal usage pattern is that users shutdown their service session before moving to another access point. See ITU-T Recom

29、mendation Q.1706/Y.2801 i.2. service continuity: ability for a moving object to maintain ongoing service over including current states, such as users network environment and session for a service NOTE: This category includes Seamless Handover and Handover. See ITU-T Recommendation Q.1706/Y.2801 i.2.

30、 seamless handover: special case of mobility with service continuity since it preserves the ability to provide services without any impact on their service level agreement to a moving object during and after movement NOTE: See ITU-T Recommendation Q.1706/Y.2801 i.2. SIP-based mobility: approach for

31、service continuity in NGN which is implemented in the application layer using SIP signalling 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AN Access Network CN Core Network CNG Customer Network Gateway CPN Customer Premises Network NASS Network Attach

32、ment Sub-System NOTE: See ES 282 004 i.3. AMF Access Management Function NOTE: See ES 282 004 i.3. ETSI ETSI TR 182 026 V3.1.1 (2009-09) 7UE User Equipment NOTE: See ES 282 004 i.3. RACS Resource and Admission Control sub-System NOTE: See ES 282 003 i.4. 4 Overview of Mobility in NGN Mobility is an

33、essential requirement for NGN users to communicate at anytime and from anywhere. This could be facilitated through the use of various wire and wireless access technologies over heterogeneous network. The solution of the mobility in NGN should take into account the long-term trend for future network,

34、 the need for a smooth evolution of the infrastructure, and the impact on existing network. In current NGN, the mobility for nomadism has already been supported, while the mobility for service continuity (i.e. handover and seamless handover) is not yet supported. 4.1 SIP-based mobility and MIP-based

35、 mobility There are two approaches for service continuity in NGN: 1) Implemented in network layer using MIP, which is called MIP-based mobility. 2) Implemented in the application layer using SIP signalling, which is called SIP-based mobility. For SIP-based mobility, the solution requires network to

36、support handover using SIP. It may support a make-before-break handover scheme. It is IP version and Access technologies agnostic and the service characteristics may be changed during the mobility procedure (e.g. add or remove media). For MIP-based mobility, the solution bases on the well establishe

37、d MIP protocol family. The mobility is transparent to the applications and access technologies. It may support the different IP version. Consequently, some kind of network assistance during handover is needed to provide MIP-based seamless mobility. MIP-based mobility is also chosen for inter-access

38、mobility management in heterogeneous networks involving both 3GPP and WiMAX. 5 Mobility Scenarios in NGN Various types of mobility scenarios exist in NGN environments. The present document considers the classifications illustrated in figure 5.1. In figure 5.1, the mobility scenarios in NGN are class

39、ified into four categories: intra-AN mobility scenarios, inter-AN mobility scenarios between same type of access networks, inter-AN mobility scenarios between different types of access networks, and inter-CN mobility scenarios. ETSI ETSI TR 182 026 V3.1.1 (2009-09) 8AN5 (T2)AN7 (T2) AN4 (T2)AN 6(T3)

40、AN8 (T3)AN3 (T3)AN2 (T1)AN1 (T1)AN9 (T1)CN3CN2CN1111Inter-CN MobilityInter-AN Mobility between same type of ANs2b2a2a2b2b2b3Inter-AN Mobility between different types of ANsIntra-AN MobilityAN Access NetworkCN Core NetworkTType of ANFigure 5.1: Classification of Mobility Scenarios 5.1 Intra-AN Mobili

41、ty Scenarios Intra-AN mobility scenarios address mobility within an AN. In figure 5.1, for example, mobility within AN1 of CN1 can be classified as Intra-AN mobility scenarios, marked as “3“ in the figure. Scenario A: Mobility between WiMax Access Networks owned by the same NGN Operator User Bob is

42、at the office (i.e. corporate network) and originates a voice call with User Alice via terminal supporting the WiMAX mode. When the call/session is established between Bob and Alice, Bob keeps the voice session ongoing and sets off from the office to the home. There are several WiMAX access nodes be

43、tween Bobs office and Bobs home. In this way, Bobs WiMAX terminal needs to be moved from one access node (e.g. WiMAX BS) to another between the office and the home that are owned by the same NGN Operator. In this scenario, only one service control subsystem (e.g. IMS), one RACS and one NASS are cons

44、idered in the access network. Figure 5.2: Mobility between WiMax Access Network owned by the same NGN Operator ETSI ETSI TR 182 026 V3.1.1 (2009-09) 9Scenario B: Mobility between WiFi Hotspots owned by the same NGN Operator User Bob has a WiFi enabled terminal and originates a voice call with User A

45、lice at anywhere. During the call, User Bob roams between WiFi Hotspots that are owned by the same NGN Operator whilst keeping the call/session established. Figure 5.3: Roaming between WiFi Hotspots owned by the same NGN Operator For this specific scenario, the CNG operates in bridge mode and direct

46、ly attaches to the NASS. Scenario C: Roaming between WiFi Hotspots owned by different NGN Operators This scenario is not described in the present document. Scenario D: Mobility between a WiFi Hotspot and WiMAX owned by the same NGN Operator User Bob has a dual mode phone which supports WiFi/WiMAX. B

47、ecause WiMAX mode has poor indoor coverage and potentially has a higher cost than using WiFi mode, Bob chooses the WiFi mode, whilst at home, to originate a voice call with User Alice (Alice could be anywhere). When the call/session is established between Bob and Alice, Bob leaves his home and in do

48、ing so roams from the WiFi access to the WiMax access that is owned by the same NGN Operator. The call/session remains established during the handover. Figure 5.4: Mobility between WiFi Hotspot and WiMAX Access owned by the same NGN Operator 5.2 Inter-AN Mobility Scenarios Inter-AN mobility scenario

49、s address mobility between different ANs within the CN. Inter-AN mobility scenarios can be further classified into the following two sub-types: 1) mobility scenarios between the same type of ANs (e.g. mobility between AN1 and AN2 within the CN1, marked as “2a“ in figure 5.1); and 2) mobility scenarios between different types of ANs (e.g. mobility between AN2 and AN3 within CN1, marked as “2b“ in figure 5.1). ETSI ETSI TR 182 026 V3.1.1 (2009-09) 105.2.1 Inter-AN Mobility Scenarios between same type of access networks Scenario E: Mobility