1、 International Telecommunication Union ITU-T Q.1706/Y.2801 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2006) SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for IMT-2000 SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWOR
2、KS Next Generation Networks Generalized mobility Mobility management requirements for NGN ITU-T Recommendation Q.1706/Y.2801 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTI
3、ONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No
4、. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS
5、 OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR THE NGN Q.3000Q.3999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.1706/Y.2801 (11/2006) i ITU-T Recommendation Q
6、.1706/Y.2801 Mobility management requirements for NGN Summary This Recommendation describes the requirements for mobility management (MM) for Next Generation Networks (NGN). For this purpose, this Recommendation describes the considerations for mobility management in the NGN, classifies the types of
7、 mobility management for NGN environment, and identifies a set of the MM requirements for NGN. Source ITU-T Recommendation Q.1706/Y.2801 was approved on 6 November 2006 by ITU-T Study Group 19 (2005-2008) under the ITU-T Recommendation A.8 procedure. Keywords Mobility management requirements, NGN, S
8、ystems beyond IMT-2000. ii ITU-T Rec. Q.1706/Y.2801 (11/2006) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsib
9、le for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T
10、 study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative b
11、asis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandato
12、ry provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The us
13、e of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no
14、 position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
15、protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2007 All rights reserved. No p
16、art of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.1706/Y.2801 (11/2006) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 4 Abbreviations 2 5 Introduction 3 6 Considerations for mobility management in NGN. 3 6.1 Ne
17、twork environments. 3 6.2 General mobility management features 4 6.3 Considerations on user part 6 6.4 Mobility management functionalities. 8 7 Classification of mobility management 9 7.1 Intra-CN MM 10 7.2 Intra-Network MM (Inter-CN MM). 10 8 Requirements for mobility management 10 8.1 General requ
18、irements 10 8.2 Requirements for Inter-CNs MM . 12 8.3 Requirements for Inter-ANs MM. 13 8.4 Requirements for Intra-AN MM 13 Appendix I Classification of mobility based on network topology 15 BIBLIOGRAPHY 17 ITU-T Rec. Q.1706/Y.2801 (11/2006) 1 ITU-T Recommendation Q.1706/Y.2801 Mobility management
19、requirements for NGN 1 Scope The scope of this Recommendation is to identify the requirements for Mobility Management (MM) for NGN. Note that the scope of this Recommendation is not limited to a specific level of mobility and covers full mobility. To that end, this Recommendation describes the follo
20、wing: Considerations of MM for NGN; Classification of MM types for NGN; Requirements for MM for NGN. Administrations may require operators and service providers to take into account national regulatory and national policy requirements in implementing this Recommendation. 2 References The following I
21、TU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendat
22、ion are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give i
23、t, as a stand-alone document, the status of a Recommendation. G.992.3 ITU-T Recommendation G.992.3 (2005), Asymmetric digital subscriber line transceivers 2 (ADSL2). Q.1741.1 ITU-T Recommendation Q.1741.1 (2002), IMT-2000 references to release 1999 of GSM evolved UMTS core network with UTRAN access
24、network. ITU-R M.1645 ITU-R Recommendation M.1645 (2003), Framework and overall objectives of the future development of IMT-2000 and systems beyond IMT-2000. 3 Definitions This Recommendation uses the definitions and terms that have been defined in the relevant ITU-T Recommendations such as Q.Sup52.
25、 In addition, this Recommendation defines the following terms: 3.1 home network: The network to which a mobile user is normally connected, or the service provider with which the mobile user is associated, and where the users subscription information is managed. 3.2 mobility: The ability for the user
26、 or other mobile entities to communicate and access services irrespective of changes of the location or technical environment. 3.3 mobility management: The set of functions used to provide mobility. These functions include authentication, authorization, location updating, paging, download of user in
27、formation and more. 3.4 open interface: An interface that uses open standards. 2 ITU-T Rec. Q.1706/Y.2801 (11/2006) 3.5 open standard: Open Standards are standards made available to the general public and are developed (or approved) and maintained via a collaborative and consensus-driven process. 3.
28、6 roaming: Q.1741.1 The ability for a user to function in a serving network different from the home network. NOTE This is the ability of the users to access services according to their user profile while moving outside of their subscribed home network, i.e., by using an access point of a visited net
29、work. This requires the ability of the user to get access to the visited network, the existence of an interface between home network and visited network, as well as a roaming agreement between the respective network operators. 3.7 seamless service: A service that is implemented such that it will ens
30、ure that users will not experience any service disruptions while changing the point of attachment. 3.8 visited network: The network outside a home network that provides service to a mobile user. This term is more business significant than geographically significant. 3.9 xDSL: G.992.3 Any of the vari
31、ous types of digital subscriber lines technologies. 4 Abbreviations This Recommendation uses the following abbreviations: 2G Second Generation 3G Third Generation AAA Authentication, Authorization and Accounting AN Access Network CN Core Network IP Internet Protocol IPv4 Internet Protocol Version 4
32、IPv6 Internet Protocol Version 6 MM Mobility Management MMR Mobility Management Requirements MT Mobile Terminal NAP Network Access Point NGN Next Generation Network NNI Network-to-Network Interface NT Network Termination QoS Quality of Service SAP Service Access Point SDO Standards Development Organ
33、ization SIP Session Initiation Protocol SLA Service Level Agreement SP Service Platform SPI Service Platform Interface TCP/IP Transmission Control Protocol/Internet Protocol ITU-T Rec. Q.1706/Y.2801 (11/2006) 3 URL Uniform Resource Locator VoIP Voice over IP WLAN Wireless Local Area Network xDSL x D
34、igital Subscriber Line 5 Introduction This Recommendation describes the requirements for mobility management (MMR) in NGN. This work has been motivated from the observation that the NGN continues to evolve toward the convergence of fixed networks and wireless mobile networks, and thus there is a cru
35、cial need to identify the requirements for mobility management to provide mobility for the users and services in the NGN environment. The rationale behind NGN is the convergence of fixed and wireless networks and ultimately migration to interoperable and harmonized network architectures. This trend
36、has caused an industry need to provide seamless services transparently to the users across different access network (AN) arrangements. This Recommendation therefore asks: “What requirements for mobility management should be considered to support the seamless services in NGN networks?“ This Recommend
37、ation identifies the considerations and requirements for mobility management for NGN. Mobility management is an essential requirement for NGN users to communicate anytime and from anywhere. This could be facilitated through the use of various wireline or wireless access technologies to enable users
38、to communicate over heterogeneous network environments. In particular, with the massive growth in the number of users and the continuing deployment of heterogeneous systems, the demand to provide seamless services to the NGN users gets stronger with time, and such pursuits present new challenges and
39、 requirements for new types of MM that could provide seamless services across heterogeneous networks. A promising solution for the new type of MM in NGN should take into account the long-term trends for future networks, the need for a smooth evolution of the infrastructure, and also the issue of bac
40、kward compatibility with existing networks. In this respect, this Recommendation will identify a set of requirements for mobility management in the emerging NGN. Clause 6 describes the considerations for mobility management for NGN, together with the general features and functionalities associated w
41、ith MM for NGN. Clause 7 classifies the types of mobility management to be addressed and for which seamless services must be provided in the NGN environment. Finally, a set of NGN MM requirements are identified and characterized in Clause 8. 6 Considerations for mobility management in NGN This claus
42、e describes the generic features and considerations associated with mobility management so as to facilitate the identification of MM requirements and protocols for NGN. 6.1 Network environments In the NGN, it is expected that a variety of the existing and new wired/wireless access network technologi
43、es are supported, such as WLAN, xDSL and 2G/3G mobile networks etc., as shown in Figure 6-1. Each of the access networks is connected to the NGN core network (CN), to provide the same set of services for users, preferably independently of the access network type. 4 ITU-T Rec. Q.1706/Y.2801 (11/2006)
44、 Figure 6-1/Q.1706/Y.2801 Envisioned network environment of NGN 6.2 General mobility management features Mobility has been used a little differently according to its application areas. However, the general feature of the mobility could be described as follows: 6.2.1 Moving object Mobility management
45、 can be classified as follows according to what moves: Terminal mobility This is the mobility for those scenarios where the same terminal equipment is moving or is used at different locations. The ability of a terminal to access telecommunication services from different locations and while in motion
46、, and the capability of the network to identify and locate that terminal. Network mobility The ability of a network, where a set of fixed or mobile nodes are networked to each other, to change, as a unit, its point of attachment to the corresponding network upon the networks movement itself. Persona
47、l mobility This is the mobility for those scenarios where the user changes the terminal used for network access at different locations. The ability of a user to access telecommunication services at any terminal on the basis of a personal identifier, and the capability of the network to provide those
48、 services delineated in the users service profile. Service mobility This is the mobility, applied for a specific service, i.e., the ability of a moving object to use the particular (subscribed) service irrespective of the location of the user and the terminal that is used for that purpose. Note that
49、 this service mobility is different from the service level mobility which is defined in ITU-T Rec. Y.2012, Functional requirements and architecture of the NGN, and related Recommendations. ITU-T Rec. Q.1706/Y.2801 (11/2006) 5 6.2.2 Features by service continuity Mobility also could be classified as shown in Figure 6-2 according to service continuity. Figure 6-2/Q.1706/Y.2801 Mobility classifications according to service quality Service continuity The ability for a moving object to maintain ongoing service over including current stat
