1、 International Telecommunication Union ITU-T Y.2252TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2012)SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Service aspects: Interoperability of services and networks in NGN I
2、dentification and configuration of resources for multi-connection Recommendation ITU-T Y.2252 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middl
3、eware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100
4、Y.1199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV ov
5、er NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250
6、Y.2299Numbering, naming and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.
7、3499 CLOUD COMPUTING Y.3500Y.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.2252 (07/2012) i Recommendation ITU-T Y.2252 Identification and configuration of resources for multi-connection Summary Recommendation ITU-T Y.2252 describes the identification of r
8、esources given by different types of simultaneous connections at the user equipment (UE) side. The resource identifiers are required to be configured in order to achieve utilization and harmonization through interaction between the multi-connection UE and the multi-connection network. History Editio
9、n Recommendation Approval Study Group 1.0 ITU-T Y.2252 2012-07-29 13 Keywords Configuration, identification, multi-connection UE, resources. ii Rec. ITU-T Y.2252 (07/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunicat
10、ions, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunicatio
11、ns on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure la
12、id 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 basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunic
13、ation administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these man
14、datory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws
15、 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 position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or
16、others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent
17、 the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2252 (07/2012)
18、iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Identification of resources and attributes for multi-connection 3 6.1 Identification of resources 4 6.2 Res
19、ource identifiers 6 7 Configuration of resource identifiers 7 7.1 Relations between resource identifiers within each layer 7 7.2 Relationship between resource identifiers and multi-connection functional entities . 9 8 Resource identifiers in multi-connection network 11 8.1 Introduction of resource I
20、Ds according to multi-connection scenarios 11 8.2 Introduction of resource IDs according to multi-connection use cases 11 9 Security considerations . 13 Bibliography. 14 iv Rec. ITU-T Y.2252 (07/2012) Rec. ITU-T Y.2252 (07/2012) 1 Recommendation ITU-T Y.2252 Identification and configuration of resou
21、rces for multi-connection 1 Scope In the multi-connection environment, a user equipment (UE) can have various capabilities through the available resources (e.g., access network information, network prefixes, IP addresses, etc.) by maintaining simultaneous connections. To achieve these advantages at
22、a multi-connection UE (MUE), these resources are required to be identified and handled at the UE side. This Recommendation relies on the multi-connection architecture ITU-T Y.2027 to describe the relationship between resource identifiers at the MUE and the multi-connection functional architecture. T
23、his Recommendation describes the identification of the available resources given by different types of simultaneous connections at the UE side. Resource identifiers are required to be configured in order to achieve efficient utilization and harmonization through interaction between the MUE and the m
24、ulti-connection functional entities within the network. This Recommendation provides a way to relate these resources with the multi-connection framework in NGN. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute
25、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 Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommen
26、dations 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 it, as a stand-alone document, the status of a Recommendation. ITU-T Q.1742.1 Recommendation ITU-T Q.1742.1 (200
27、2), IMT-2000 references to ANSI-41 evolved core network with cdma2000 access network. ITU-T X.200 Recommendation ITU-T X.200 (1994), Information technology Open Systems Interconnection Basic Reference Model: The basic model. ITU-T Y.1221 Recommendation ITU-T Y.1221 (2010), Traffic control and conges
28、tion control in IP-based networks. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks. ITU-T Y.2027 Recommendation ITU-T Y.2027 (2012), Functional architecture of multi-connection. ITU-T Y.2091 Recommendation ITU-T Y.2091 (2011), Ter
29、ms and definitions for next generation networks. ITU-T Y.2201 Recommendation ITU-T Y.2201 (2009), Requirements and capabilities for ITU-T NGN. ITU-T Y.2251 Recommendation ITU-T Y.2251 (2011), Multi-connection Requirements. 2 Rec. ITU-T Y.2252 (07/2012) 3 Definitions 3.1 Terms defined elsewhere This
30、Recommendation uses the following terms defined elsewhere: 3.1.1 connection ITU-T X.200: A connection is an association established for the transfer of data between two or more peer-(N)-entities. This association binds the peer-(N)-entities together with the (N1)-entities in the next lower layer. 3.
31、1.2 IP flow ITU-T Y.2251: An IP flow at a given interface is defined as the occurrence at that interface of the set of IP packets, which match a given classification. An IP flow may consist of packets from a single application session, or it may be an aggregation comprising the combined traffic from
32、 a number of application sessions. When a classification may be subdivided into different sub-classifications (separate or overlapping), different IP sub flows may be recognized in the corresponding IP flow. NOTE 1 In this Recommendation, a session is identified by a session identifier (SEID). NOTE
33、2 In this Recommendation, an IP flow is identified by an Internet protocol flow identifier (FLID). When a classification may be subdivided into different sub-classifications, these separate sub-classifications are identified by different FLIDs. 3.1.3 multi-connection user equipment (MUE) ITU-T Y.202
34、7: A user equipment which can support two or more network connections simultaneously under the control of a network enhanced for multi-connection capability. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 lower abstraction point (LAP): A conceptual pl
35、ace that exists in the lower part between two adjacent layers where various relations are established between layers. 3.2.2 multi-connection: The collection of several connections between two or more peer-(N)-entities simultaneously. At least one of the connections is associated with a physical laye
36、r connectivity different from the rest of the connections. All connections are coordinated with each other to provide service to higher layer entities. NOTE In ITU-T Y.2251, multi-connection is defined as the functionality which provides capability to the user equipment and network to maintain more
37、than one access network connection simultaneously. 3.2.3 upper abstraction point (UAP): A conceptual place that exists in the upper part between two adjacent layers where various relations are established between layers. 4 Abbreviations and acronyms This Recommendation uses the following abbreviatio
38、ns and acronyms: 3G Third Generation AC-FE Access Control FE ANID Access Network Identifier APN Access Point Name FE Functional Entity FLID Internet protocol Flow Identifier ID Identifier IFID Interface Identifier Rec. ITU-T Y.2252 (07/2012) 3 IMPI IP Multimedia Private Identity IMPU IP Multimedia P
39、ublic identity IP Internet Protocol ISM Industrial, Scientific and Medical LAN Local Area Network LAP Lower Abstraction Point MAC Media Access Control MAS-F Multi-connection Application Support Function MC Multi-Connection MC-FE Multi-connection Coordination Functional Entity MMF Multi-connection Me
40、dia Function MPC-FE Multi-connection Policy Control Functional Entity MR-FE Multi-connection Registration Functional Entity MTC-FE Multi-connection Terminal Control Functional Entity MUE Multi-connection User Equipment MUP-FE Multi-connection User Profile Functional Entity NGN Next Generation Networ
41、k PHY Physical layer RAT Radio Access Technologies SCF Service Control Functions SEID Session Identifier SVID Service Identifier TCP Transmission Control Protocol UAP Upper Abstraction Point UE User Equipment URL Uniform Resource Locator Wi-Fi Wireless Fidelity WLAN Wireless Local Area Network WPAN
42、Wireless Personal Area Network WWAN Wireless Wide Area Network WWW World Wide Web 5 Conventions None. 6 Identification of resources and attributes for multi-connection An MUE has multiple network interfaces to each of its attached access networks such as wired Ethernet LANs, 802.11 LANs, 3G cellular
43、 networks, etc. In order to use these multiple interfaces, 4 Rec. ITU-T Y.2252 (07/2012) the MUE needs first to receive from the network side information on the available resources, such as access network information, network prefixes, IP addresses, etc., and is required to identify these resources
44、and attributes. These resources could be received from the multi-connection architecture on the NGN network side as well as from its own system. This clause addresses resources and attributes used in the multi-connection environment at the UE side. Also, resource identifiers are again defined, from
45、the MUE perspective, in order to manage these resources so as to achieve certain capabilities at the MUE, such as efficient utilization of the network and reliability of the connection. 6.1 Identification of resources Figure 6-1 shows the association of the multi-connection architecture functional e
46、ntities relative to the general TCP/IP stack. Y.2252(12)_F6-1Access networkAccess control FE(AC-FE)Multi-connection media function(MMF)Service control function(SCF)Multi-connection application support function (MAS-F)ApplicationsMulti-connectioncontrol functionMulti-connectionuser profile FEMulti-co
47、nnectionregistration FEMulti-connection coordination FEMulti-connectionpolicy control FEMUEMulti-connection terminal controlfunctionApplication layerTransport layerNetwork layerPHY/MAC layer Access networkAccess control FE(AC-FE)Figure 6-1 Association of the multi-connection architecture functional
48、entities relative to the general TCP/IP stack The MUE is required to identify the information on the available resources received from the multi-connection functional entities in order to utilize this information corresponding to multi-connection. The following clauses describe the available resourc
49、es and their attributes from the MUE perspective. 6.1.1 Resources related to multi-connection This clause describes the available multi-connection resources with reference to the TCP/IP stack as follows: a) PHY/MAC layer: It is directly related to multi-connection since the primary feature of multi-connection is to federate all means of access technologies. The available resources are defined as follows: i) Access network: There are many available access networks in the multi-connection environmen
