ngn 2005

Document Sample
ngn 2005 Powered By Docstoc
					International Telecommunication Union




   NGN Focus Group
Resource and Admission
       Control
            Keith Mainwaring
          kmainwar@cisco.com
      Co-Chair of FG NGN WG3 (QoS)


         NGN Technical Workshop 13 ~ 14 March Jeju, Korea
                TR-RACF - Functional Requirements and Architecture for
                  Resource and Admission Control in Next Generation
                                      Networks


             o Covers procedures for the control of QoS (including
               resource reservation, admission control and gate control) ,
               control of NAPT and Firewall traversal.
             o Admission control involves checking authorisation based on
               user profiles, SLAs, operator specific policy rules, and
               resource availability within access and core transport.
             o Within the NGN architecture, the RACF acts as the
               arbitrator for resource negotiation and allocation between
               Application Functions and Transport Functions.
             o Similar to ETSI but wider scope than TISPAN Release 1 (e.g.
               including core network control and inter-domain PDF-PDF
               communication).


                            ITU-T WORKSHOP On Next Generation Networks
                           in Collaboration with IETF (Geneva, 1-2 May 2005)   2
29.04.2005
                                       Generic Resource and Admission Control Functional
                                                         Architecture


                                                                                        Service Control Functions

                                                                            SCPF                      SCF                     IBCF
  Service Stratum
                                                                                G q’                                   Gq’
  Transport Stratum




                                                                                                                                           Other NGNs
                                                                                       Resource and Admission Control Functions
                                                                                                                                      Rq
                     Network Access                                         PDF
                       Attachment            Ub                                                                   Rq
                                                                  Rq
                        Functions                                                      Rq      Rp
                                                                                                                                      X
                                                                                                                   I-TRCF
                                                  A- TRCF                                        C-TRCF




                                            Re    Rc          Re          Go’                    Rc         Go’          Rc




             R-BGF                    ANF                   ENF            A-BGF                                              I-BGF

         CPN                           Access Transport                                     Core Transport




                                                        ITU-T WORKSHOP On Next Generation Networks
                                                       in Collaboration with IETF (Geneva, 1-2 May 2005)                                                3
29.04.2005
             R-BGF - Residential Border Gateway Functional entity
             CPN - Customer Premises Network
             ANF - Access Node Functional entity
             ENF - Edge Node Functional entity
             SCPF - Session Control Proxy Functional entity
             SCF - Session Control Functional entity
             IBCF   - Interconnection Border Control Functional entity
             PDF - Policy Decision Functional entity
             A-TRCF - Access Transport Resource Control Functional entity
             C-TRCF - Core Transport Resource Control Functional entity
             I-TRCF - Interconnection Transport Resource Control Functional entity
             A-BGF - Access Border Gateway Functional entity
             I-BGF  - Interconnection Border Gateway Functional entity




                                      ITU-T WORKSHOP On Next Generation Networks
                                     in Collaboration with IETF (Geneva, 1-2 May 2005)   4
29.04.2005
                  Network Access Attachment
                      Functions (NAAF)

             o Dynamic provision of IP address and other user
                 equipment configuration parameters.
             o   Authentication of user access network, prior or
                 during the IP address allocation procedure.
             o   Authorisation of user access network, based on
                 user profiles.
             o   Access network configuration, based on user
                 profiles.
             o   Location management.

                         ITU-T WORKSHOP On Next Generation Networks
                        in Collaboration with IETF (Geneva, 1-2 May 2005)   5
29.04.2005
             Resource and Admission Control Functions
                       Function                                          Description                              Location

                 QoS Mapping - Technology            Maps the service QoS parameters received from the SCF          PDF
                       Independent                     to network QoS parameters (transport technology
                         (QMTI)                                          independent)

                     Final Decision Point               Performs the policy decisions in terms of network           PDF
                            (FDP)                       resources and admission control, based on request
                                                                    information from the SCF

                  IP Packet Marking Control           Decides on the packet marking and remarking of flows          PDF
                           (IPMC)
                       NAPT Control                   Controls network address translation for both near end        PDF
                        (NAPTC)                                   NA(P)T and far end NA(P)T

                       IP Gate Control                 Controls the opening and closing of a gate. A gate is        PDF,
                           (IPGC)                            defined by, for example, an IP 5-tuple.               A-TRCF

                 QoS Mapping - Technology           Maps the network QoS parameters to transport technology         TRCF
                       Dependent                       dependent QoS parameters (transport technology
                        (QMTD)                                           dependent).
               Technology Dependent Decision             Performs technology-dependent policy decision.             TRCF
                           Point
                          (TDP)

              Technology-Dependent Gate Control        Controls the opening and closing of a gate. A gate is        TRCF
                          (TDGC)                    defined by, for example, an IP 5-tuple and additional link-
                                                                         layer attributes

               Network Topology Maintenance           Collects and maintains the network topology, e.g., from       TRCF
                          (NTM)                                               routing
               Network Resource Management            Collects and maintains the resource status information        TRCF
                          (NRM)

                  Element Resource Control        Controls resources at the element level (such as control of       TRCF
                           (ERC)                                   policing and shaping)
                              ITU-T WORKSHOP On Next Generation Networks
                             in Collaboration with IETF (Geneva, 1-2 May 2005)                                               6
29.04.2005
                                              Issues


             o Inter-operator domain boundaries
             o Addition of PDF to access network
             o Inclusion of core network selection




                      ITU-T WORKSHOP On Next Generation Networks
                     in Collaboration with IETF (Geneva, 1-2 May 2005)   7
29.04.2005

				
DOCUMENT INFO
Shared By:
Tags: 2005
Stats:
views:95
posted:1/9/2009
language:Swedish
pages:7