1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.611TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2003) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSBroadband and triple-play multimedia services Broadband multimedia services over VDSL Full-Service VDSL Operations, Administration Maintenance users
2、 of this Recommendation 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 Recommenda
3、tion does not give it, as a stand-alone document, the status of a Recommendation. 2.1 Normative references ITU-T Recommendation G.993.1 (2001), Very high speed digital subscriber line foundation. ITU-T Recommendation G.997.1 (1999), Physical layer management for digital subscriber line (DSL) transce
4、ivers. ITU-T Recommendation H.610 (2003), Full-Service VDSL System architecture and customer premises equipment. ITU-T Recommendation I.610 (1999), B-ISDN operation and maintenance principles and functions. ANSI T1.424 Part-1-2000, Very high-bit-rate Digital Subscriber Line (VDSL) Metallic Interface
5、, Part 1: Functional Requirements and Common Specification. ETSI TS101 270-1 (2003), Transmission and multiplexing (TM); Access Transmission systems on metallic access cables; Very high speed Digital Subscriber line (VDSL); Part 1: Functional requirements. ETSI TS101 270-2 (2003), Transmission and m
6、ultiplexing (TM); Access Transmission systems on metallic access cables; Very high speed Digital Subscriber line (VDSL); Part 2: Transceiver specification. IETF RFC 1157 (1999), A Simple Network Management Protocol (SNMP). IETF RFC 1213 (1991), Management Information Base for Network Management of T
7、CP/IP-based internets: MIB-II. 2.2 Non-normative references IETF draft-ietf-adslmib-vdsl-03.txt, Definition of Managed Objects for VDSL Lines, June 2002. 2 ITU-T Rec. H.611 (07/2003) DSL Forum TR-057, VDSL Element Management, February 2003. 3 Definitions This Recommendation defines the following ter
8、ms: 3.1 access network domain: The Access Network Domain encompasses the domain between the U-R and V interface of the system reference model (Figure 1). H.611_F1AppVTU-CPSPSVTP/DU-RU-R2POTS/ISDNRTCNR OLTVOTU-RR/S S/RODNQAppAppAppFPDFPDFPDFPDOTU-CService nodesEMSMIWCNManagementnetworkU-CU-C2ONUPOTS/
9、ISDNPOTS/ISDNDigitalcustomer premises distributionnetworkLoopplantPOTS/ISDNCOTU-COTU-COTU-COTU-CDigital broadcast networkInteractive AV networkInternet networkVoicenetworkVTU-CVTU-CVTU-CVTU-CFigure 1/H.611 FS-VDSL reference model 3.2 core network domain: The Core Network Domain is beyond the V inter
10、face and the OLT physical interface. 3.3 the platform: The platform is the hardware and software that comprises the Access Network and its Element Manager. 3.4 network operation domain: The Network Operation Domain comprises the entities that manage the end-to-end network, including the Operations S
11、ystems Functions of the Network Management Layer, the technicians who install and repair network elements and the back office people who deal with network issues. 3.5 service operation domain: The Service Operation Domain includes the physical equipment of multiple or single service nodes that inter
12、face the Core/AN and provide users access to various services including data connection, broadcast video, VoD, and voice, and the Operations Systems Functions of the Service Management Layer used to manage the services and service nodes. 3.6 Functional Processing (FP): A point of signal transformati
13、on or processing. 3.7 Functional Processing and Decoding (FPD): Typically terminals performing the application layer processing of video, audio and data, e.g., Set top box (STB). 3.8 VDSL Termination Processing (VTP): Refers to the unit that operates the VDSL modem termination and protocol processin
14、g functions. A device that implements the VTP functions includes Ethernet based layer-2 interface to the in-home Network. ITU-T Rec. H.611 (07/2003) 3 3.9 VTP and Decoding (VTPD): Refers to a unit that operates the video decoding function as well as the VTP functions and interfaces. 3.10 VTP/D: When
15、 mentioned in this Recommendation, refers to both the VTP and the VTPD. 3.11 auto-discovery: the process of the platform detecting when new hardware or software entity has been added to it, identifying the entity and extracting any relevant parameters from it. 3.12 EMS-NMS interface: The interface b
16、etween the FS-VDSL platform element manager and the full service broadband network management system as shown in Figure 2. H.611_F2Existing OSS Existing OSS New OSSBroadbandNMSSubnetworkEMSSubnetworkEMSATMNEATMNEATMNESDHNESDHNESDHNEFS-VDSL-EMSFS-VDSLNEFS-VDSLNEFS-VDSLNEFigure 2/H.611 Management arch
17、itecture 4 Abbreviations This Recommendation uses the following abbreviations: AAL2 ATM Adaptation Layer 2 ADSL Asymmetric Digital Subscriber Line ANSI American National Standards Institute ATM Asynchronous Transfer Mode AWG American Wire Gauge 4 ITU-T Rec. H.611 (07/2003) B-ISDN Broadband Integrate
18、d Services Digital Network ITU-T BLES Broadband Loop Emulated Service BOOTP Bootstrap Protocol IETF CBR Constant Bit Rate CMISE Common Management Information Service Element ISO CO Central Office CORBA Common Object Request Brokerage Architecture CPE Customers Premises Equipment CPU Central Processi
19、ng Unit CRC Cyclic Redundancy Check dBm Decibels in milliwatts DCT Digital Communications Tester DRP Disaster Recovery Plan DS0 Digital Signal level 0 DSL Digital Subscriber Line DSLAM Digital Subscriber Line Access Multiplexer DSM-CC Digital Storage Media Command and Control EMS Element Management
20、System ETSI European Telecommunications Standards Institute F4 Flow 4 ATM F5 Flow 5 ATM FP Functional Processing FPD Functional Processing and Decoding FRU Field Replaceable Unit FS-VDSL Full Service Access Network Very high speed Digital Subscriber Line FTTC Fibre To The Cabinet FTTEx Fibre To The
21、Exchange FTTK Fibre To The Kerb GUI Graphical User Interface HAM Amateur Radio Operator HTML HyperText Mark-up Language HTTP HyperText Transfer Protocol IETF Internet Engineering Task Force IGMP Internet Group Management Protocol IETF ILMI Integrated Local Management Interface IP Internet Protocol I
22、ETF ISDN Integrated Services Digital Network ITU-T Rec. H.611 (07/2003) 5 LAN Local Area Network LED Light-Emitting Diode MAC Media Access Control MDU Multi-Dwelling Unit MIB Management Information Base MPEG Moving Picture Experts Group NE Network Element NML Network Management Layer NMS Network Man
23、agement System NO Network Operator OAM “should“ indicates a suggested but optional course of action; “may“ indicates an optional course of action rather than a recommendation that something take place. 6 Functional diagram The linkage between the processes and the functions that relate to the FS-VDS
24、L platform are shown in Figure 3. The diagram is divided by a continuous line, below the line are four functional areas, Network Provision, Network Data Management, Service Quality Management and FS-VDSL Maintain and Restore that are specific to the platform. Above the line are the functions that ar
25、e required, but are not FS-VDSL specific, and would be implemented in the Network Operation domain or Service Operation Domain. It also identifies the interfaces between these specific and non-specific functions. 7 ITU-T Rec. H.611 (07/2003) H.611_F3Start billingQoS paramsQoS paramsQoS paramsIncreas
26、e capacityCapacity used/unusedQoS paramsOSSTest requestProvision test resultReferService IDNetwork reconfigurationNetwork domainSales Order handlingService config.Future market infoFix*Network data management*Service operation domainMISThe functionality outside the FS-VDSL platformNetworkinventory m
27、anagementNetworkplanning these parameters are definable on a per line basis and the MIB present at the ONU for each line shall be configured when the VDSL linecard is installed. Configuration of the VDSL line will then take place when the VTP/D is installed and the VDSL modems train up. ITU-T Rec. H
28、.611 (07/2003) 9 7.1.3 ONU control authorization of PPV programming; restore VTP/D to known default configuration, e.g., to clear parental lock. ITU-T Rec. H.611 (07/2003) 11 If only the VTP_ID is specified the bitmap will apply to all flow_ids containing that VTP_ID. H.611_F5NMLOLTTransportONUVTPFP
29、DFS-VDSL platformEMSAccess controlFlow_Id (can be just VTP_ID)Entitlement (Bitmap)Access controlFlow_Id (can bejust VTP_ID)Entitlement(Bitmap)Serviceoperation domainVideo servicemgmtServiceoperation domainVideo servicemgmtVideohead-endVideohead-endFigure 5/H.611 Access control channels 8 Network dat
30、a management 8.1 Usage data It is expected that most usage information will come from outside the VDSL platform, e.g., the Service Operation Domain. For this reason, only limited usage information is specified as being logged and stored within the VDSL platform. ATM switching event logging and ATM c
31、ell count logging shall be activated on a per flow_id basis if required by the Service Operation Domain. Service usage events shall be stored within the platform so that they can be extracted by Domain specific OSS. The platform will be capable of storing service usage data for a period as specified
32、 by the domain. This functionality allows charging: by bits transferred; by elapsed time; by time of day (implies date stamping); by access to content Metasignalling data; by access to content for a limited time Metasignalling data; according to QoS. 12 ITU-T Rec. H.611 (07/2003) 8.2 Ensuring accura
33、cy of usage information VTP/D MAC IDs, Serial Numbers and IP addresses shall match individual customer service subscriptions and service requests. Most of these relationships are held outside the FS-VDSL platform, however it is essential that 100% accuracy is maintained within the platform between V
34、TP_ID, flow_id and ATM level usage information. This may be more challenging when the VTP/D is not provided or managed by the Network Operation Domain. The platform should provide a facility to allow only the known VTP/D to be recognized unless the Network Operation Domain intervenes. 8.3 Topology (
35、relationship between equipment and services) It shall be possible to generate a list of physical hardware and software components, using terminology defined in ITU-T Rec. H.610, that are used to deliver a particular instance of a particular service. This would, for example, enable the Network Operat
36、ion Domain to look for relevant alarms in response to a trouble report. There should be minimum manual inventory and configuration recording. The Network Operation Domain shall be able to request, on demand, the EMS to provide the view of the sub-network of the EMS for all physical hardware and soft
37、ware components. This should include associated facility link information and link terminations for the network elements. It should be possible for the Network Operation Domain to be able to construct an updated physical network map/topology view from such information. If the EMS automatically and a
38、utonomously performs network discovery and has updated information in its database, then it should provide such information to the Network Operation Domain, upon request. 8.4 Utilization/capacity management It shall be possible to generate a list of all components in the platform, using standard FS-
39、VDSL terminology, showing the total capacity and the current utilization of each component. This will enable capacity planning rules to be set in the Network Operation Domain. It should be possible to mark unused capacity as reserved. There shall be a facility to hold configuration information inclu
40、ding that of pre-provisioning and capacity reservation during maintenance activities. 8.5 Equipment information It shall be possible to obtain the following information for all FS-VDSL inventory where applicable: software version, hardware version, serial number, MAC address, IP address, ATM address
41、, vendor and model number. In addition for any inventory item, it shall be possible for a User Defined Label to be provided by the Network Operation Domain and associated with that item. This label shall have a minimum available character length of 256 bytes. 9 Service quality management For a speci
42、fic customer flow_id there shall be: Auto-reporting of QoS exceptions based on downloaded thresholds. The requirement from the Network Operation Domain is real time, the vendor should be able to advise the maximum delay between the exception occurring and the report being generated; the ability to r
43、eport QoS parameters on demand; ITU-T Rec. H.611 (07/2003) 13 the ability to report QoS parameters against predefined schedule (i.e., timescales); the ability to feed in QoS thresholds. Any QoS exception report shall have an associated location statement and suggested course of action to clear the p
44、roblem that indicates the root cause and, if desired, only the root cause. Figure 1/H.610 defines the minimum set of locations. The suggested course of action statements shall be human readable text no greater than 1024 characters: location statements should define a FRU (Field Replaceable Unit) or
45、bearer if appropriate; distance to fault along bearer may be provided. NOTE A valid corrective action could be to increase capacity at a given network node or link between nodes. 10 Network maintenance and restoration 10.1 General requirements a) There should be no prevention of the testing of telep
46、hone apparatus, baseband telephony service or ISDN service. b) There is no requirement to gain information about the FPDs. c) The OLT, ONU and VTP/D shall include a local access port for craft terminal access to system information including alarms and MIBs. d) Test functions if required by the Netwo
47、rk Operation Domain shall manage subscriber drop testing and channel testing. e) The OAM functionality of the interface between the FS-VDSL platform and legacy PSTN platform needs to be defined if VoDSL services are to be supported. This is currently not part of this Recommendation. f) The facility
48、to extend alarms to physical contact monitoring systems within the CO is optional. Alarm unit and alarm test unit options can include: contact closure alarm inputs; loop closure output alarms; alarm severity and location indicators; bay lamp control; alarm cut-off switch with alarm cut-off LED; chan
49、nel test; serial interface driver; digital by-pass support. g) Each compliant FRU (e.g., linecard, VTP/D) shall have a visible indication of status: as a minimum active /non-active/ error. These indications shall be consistent with alarms as indicated on the EMS, in addition the VTP/D should indicate the VDSL link status. h) It is assumed that correlation between the FS-VDSL platform alarms and alarms from other network elements will take place in Network Operation Domain OSS and is
