1、Standard ECMA-261June 1997Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chBroadband Private Integrated ServicesNetwork (B-PISN) -Service Description - BroadbandConnection Oriented Bearer Services.S
2、tandard ECMA-261June 1997Standardizing Information and Communication SystemsPhone: +41 22 849.60.00 - Fax: +41 22 849.60.01 - URL: http:/www.ecma.ch - Internet: helpdeskecma.chIW Ecma-261.doc 14-07-97 09,14Broadband Private Integrated ServicesNetwork (B-PISN) -Service Description - BroadbandConnecti
3、on Oriented Bearer Services(B-BCSD).Brief HistoryThis Standard is one of a series of ECMA Standards defining services and signalling protocols applicable to BroadbandPrivate Integrated Services Networks (B-PISNs). The series uses B-ISDN concepts as developed by ITU -T and conforms tothe framework of
4、 International Standards for Open Systems Interconnection as defined by ISO/IEC. It has been producedunder ETSI work item DE/ECMA-00132.This particular Standard specifies the broadband connection oriented bearer services.This Standard is based upon the practical experience of ECMA member companies a
5、nd the results of their active andcontinuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI and other international and national standardizationbodies. It represents a pragmatic and widely based consensus.The services specified in this Standard are compatible with the equivalent services spe
6、cified by the ATM Forum for privateATM networks and by ITU-T or ETSI for public B-ISDN.This ECMA Standard is contributed to ISO/IEC JTC1 under the terms of the fast-track procedure, for adoption as anISO/IEC International Standard.This ECMA Standard has been adopted by the General Assembly of June 1
7、997.- i -Table of contents1 Scope 12 Conformance 13 References (normative) 14 Definitions 14.1 External definitions 14.2 Call 24.3 Call/connection 25 List of acronyms 26 Broadband connection oriented bearer services 26.1 Description 26.2 Static Description: Service Attributes 36.2.1 Bearer service u
8、sing a constant bit rate 36.2.2 Bearer service with real time requirements using a variable bit rate 46.2.3 Bearer service without real time requirements using a variable bit rate 46.2.4 Bearer service using the available bit rate 56.2.5 Bearer service using the unspecified bit rate 66.3 Procedures
9、76.3.1 Provision 76.3.2 Normal procedures 76.3.3 Exceptional procedures 86.4 Interworking considerations 86.4.1 Interworking with a public B-ISDN 86.4.2 Interworking with a narrowband private integrated services network (N-PISN) 8Annex A - Glossary of terms 9- ii -.1 ScopeThis Standard specifies ser
10、vice description and control aspects of the broadband connection oriented bearer serviceswhich may be provided by Broadband Private Integrated Services Networks (B-PISNs).One of the purposes of the service specification for broadband connection oriented bearer services is to guide andconstrain the w
11、ork on signalling protocols. Therefore, this Standard is concerned mainly with the control aspects ofservices.Change of traffic characteristics during a call is outside the scope of this Standard.Charging considerations are outside the scope of this Standard.2 ConformanceIn order to conform to this
12、Standard, a protocol standard shall specify signalling protocols and equipment behaviourthat are capable of being used in a B-PISN which supports the bearer service specified in this Standard. This meansthat, to claim conformance, a protocol standard is required to be adequate for the support of tho
13、se aspects of clause 6which are relevant to the interface or equipment to which the protocol standard applies.3 References (normative)ISO/IEC 11574 Information technology - Private Integrat ed Services Network - Circuit mode 64kbit/s bearerservices - Service description, functional capabilities and
14、information flows (1994)ISO/IEC 11579-1 Information technology - Telecommunications and information exchange between systems -Private Integrated Services Network - Part 1: Reference configuration for PISN Exchanges(PINX) (1994)ITU-T Rec. I.112 Vocabulary of terms for ISDNs (1993)ITU-T Rec. I.113 Voc
15、abulary of terms for broadband aspects of ISDN (1993)ITU-T Rec. I.210 Principles of telecommunication services supported by an ISDN and the means to describe them(1993)ITU-T Rec. I.361 B-ISDN ATM layer specificationITU-T Rec. I.363 B-ISDN ATM adaptation layer (AAL) specificationATM Forum User Networ
16、k Interface Specification, Version 4.0 (UNI 4.0)ATM Forum Traffic Management Specification, Version 4.0 (TM 4.0)4 DefinitionsFor the purposes of this Standard, the following definitions apply.4.1 External definitionsThis Standard uses the following terms defined in other documents: Basic service (IT
17、U-T Rec. I.210) Connection (ITU-T Rec. I.113) Private Integrated Services Network (PISN) (ISO/IEC 11579-1) Private Integrated Services Network Exchange (PINX) (ISO/IEC 11579-1) Service (ITU-T Rec. I.112) Signalling (ITU-T Rec. I.112) Supplementary Service (ITU-T Rec. I.210)- 2 - Traffic contract (IT
18、U-T Rec. I.113) User (ISO/IEC 11574) Virtual channel (ITU-T Rec. I.113)4.2 CallAn association between two or more users using a telecommunication service to communicate through one ormore networks.4.3 Call/conne ctionA call combined with a single connection in the user plane for the transfer of user
19、 information.5 List of acronymsAAL ATM Adaptation LayerABR Available Bit RateATM Asynchronous Transfer ModeB-PISN Broadband Private Integrated Services NetworkBCOB Broadband Connection Oriented BearerCBR Constant Bit RateCDV Cell Delay VariationCLP Cell Loss PriorityCLR Cell Loss RatioISDN Integrate
20、d Services Digital NetworkMBS Maximum Burst SizeMCR Minimum Cell RateOAM Operation And MaintenancePCR Peak Cell RatePINX Private Integrated Services Network ExchangePISN Private Integrated Services NetworkQoS Quality of ServiceSCR Sustainable Cell RateUBR Unspecified Bit RateVBR Variable Bit Rate6 B
21、roadband connection oriented bearer services6.1 DescriptionThese bearer services allow PISN users to request on a demand basis unrestricted digital information transfer withconstant or variable bit rate between PISN users and to negotiate a suitable traffic contract with the PISN.On the basis of the
22、 negotiated traffic contract, PISN users can communicate in point to point or point to multipointconfigurations via the PISN using ATM virtual channel connections. Once a virtual channel connection has beenestablished according to the procedures described in clause 6.3, it is available for the trans
23、mission of digitalsignals either in one direction or in both directions simultaneously, within the limits of the traffic contract, for theduration of the call/connection. The PISN shall place no restrictions on the content of the digital signals but mayapply traffic and congestion control in order t
24、o prevent violation of the negotiated traffic contract.- 3 -6.2 Static Description: Service AttributesThe valid combinations of service attributes for all bearer services specified here are those defined in annex 9 ofthe ATM Forum specification UNI 4.0. The ATM service categories are defined in the
25、ATM Forum specificationTM 4.0.6.2.1 Bearer service using a constant bit rate6.2.1.1 Dominant information transfer attributesThe dominant information transfer attribute values for this service shall be:1) Information transfer mode: ATM1.1) Connection mode: Connection oriented1.2) ATM service category
26、: Constant Bit Rate (CBR)1.3) Allowable bearer classes: BCOB-A, BCOB-X2) Information transfer rate: Specified individually for each direction of transmission2.1) Peak cell rate: PCR(CLP=0+1) declared by the user on a per connection basisPCR(CLP=0) optionally declared separatelyPCR(OAM) optionally de
27、clared separately2.2) Sustainable cell rate / maximum burst size: not applicable2.3) Tagging: Not allowed, or optionally allowed if PCR(CLP=0) is given2.4) Frame discard: Either allowed or not allowed3) Information transfer capability: Unrestricted4) Structure: Cell sequence integrity.6.2.1.2 Second
28、ary information transfer attributesThe secondary information transfer attribute values for this service category shall be:5) Establishment of communication: Demand; reserved and permanent outside the scope of thisStandard6) Symmetry: Bidirectional symmetric, bidirectional asymmetric, unidirectional7
29、) Communication configuration: Point-to-point; point to multi-point6.2.1.3 Access attributesThe access attribute values for this service category shall be:8) Access channel: ATM virtual channel9) Access protocol: ATM layer: I.361ATM Adaptation Layer (AAL): I.363Higher layers: Application specific6.2
30、.1.4 General attributes10) Supplementary services provided: Outside the scope of this Standard11) Quality of service: QoS class 0; other classes network specific11.1) Maximum end-to-end transit delay: Optionally specified (for forward direction).11.2) Cell loss ratio: Optionally either CLR(CLP=0+1)
31、or CLR(CLP=0) specified11.3) Cell delay variation: Optionally peak-to-peak CDV specified12) Interworking possibilities: 64 kbit/s and n x 64 kbit/s circuit mode basic services- 4 -6.2.2 Bearer service with real time requirements using a variable bit rate6.2.2.1 Dominant information transfer attribut
32、esThe dominant information transfer attribute values for this service shall be:1) Information transfer mode: ATM1.1) Connection mode: Connection oriented1.2) ATM service category: Real Time Variable Bit Rate (rt-VBR)1.3) Allowable bearer classes: BCOB-C, BCOB-X2) Information transfer rate: Specified
33、 individually for each direction of transmission2.1) Peak cell rate: PCR(CLP=0+1) declared by the user on a per connection basis2.2) Sustainable cell rate: Either SCR(CLP=0+1) or SCR(CLP=0) declared by the user on a perconnection basis2.3) Maximum burst size: Either MBS(CLP=0+1) or MBS(CLP=0) declar
34、ed by the user on a perconnection basis2.4) Tagging: If SCR(CLP=0) is given, either allowed or not allowed2.5) Frame discard: Either allowed or not allowed3) Information transfer capability: Unrestricted4) Structure: Cell sequence integrity.6.2.2.2 Secondary information transfer attributesThe second
35、ary information transfer attribute values for this service category shall be:5) Establishment of communication: Demand; reserved and permanent outside the scope of thisStandard6) Symmetry: Bidirectional symmetric, bidirectional asymmetric, unidirectional7) Communication configuration: Point-to-point
36、; point to multi-point6.2.2.3 Access attributesThe access attribute values for this service category shall be:8) Access channel: ATM virtual channel9) Access protocol: ATM layer: I.361ATM Adaptation Layer (AAL): I.363Higher layers: Application specific6.2.2.4 General attributes10) Supplementary serv
37、ices provided: Outside the scope of this Standard11) Quality of service: QoS class 0; other classes network specific11.1) Maximum end-to-end transit delay: Optionally specified (for forward direction).11.2) Cell loss ratio: Optionally either CLR(CLP=0+1) or CLR(CLP=0) specified11.3) Cell delay varia
38、tion: Optionally peak-to-peak CDV specified12) Interworking possibilities: Application specific6.2.3 Bearer service without real time requirements using a variable bit rate6.2.3.1 Dominant information transfer attributesThe dominant information transfer attribute values for this service shall be:1)
39、Information transfer mode: ATM- 5 -1.1) Connection mode: Connection oriented1.2) ATM service category: Non-real Time Variable Bit Rate (nrt-VBR)1.3) Allowable bearer classes: BCOB-C, BCOB-X2) Information transfer rate: Specified individually for each direction of transmission2.1) Peak cell rate: PCR
40、(CLP=0+1) declared by the user on a per connection basis2.2) Sustainable cell rate: Either SCR(CLP=0+1) or SCR(CLP=0) declared by the user on a perconnection basis2.3) Maximum burst size: Either MBS(CLP=0+1) or MBS(CLP=0) declared by the user on a perconnection basis2.4) Tagging: If SCR(CLP=0) is gi
41、ven, either allowed or not allowed2.5) Frame discard: Either allowed or not allowed3) Information transfer capability: Unrestricted4) Structure: Cell sequence integrity.6.2.3.2 Secondary information transfer attributesThe secondary information transfer attribute values for this service category shal
42、l be:5) Establishment of communication: Demand; reserved and permanent outside the scope of thisStandard6) Symmetry: Bidirectional symmetric, bidirectional asymmetric, unidirectional7) Communication configuration: Point-to-point; point to multi-point6.2.3.3 Access attributesThe access attribute valu
43、es for this service category shall be:8) Access channel: ATM virtual channel9) Access protocol: ATM layer: I.361ATM Adaptation Layer (AAL): I.363Higher layers: Application specific6.2.3.4 General attributes10) Supplementary services provided: Outside the scope of this Standard11) Quality of service:
44、 QoS class 0; other classes network specific11.1) Cell loss ratio: Optionally either CLR(CLP=0+1) or CLR(CLP=0) specified11.2) Cell delay variation: Unspecified12) Interworking possibilities: Application specific6.2.4 Bearer service using the available bit rate6.2.4.1 Dominant information transfer a
45、ttributesThe dominant information transfer attribute values for this service shall be:1) Information transfer mode: ATM1.1) Connection mode: Connection oriented1.2) ATM service category: Available Bit Rate (ABR)1.3) Allowable bearer classes: BCOB-C, BCOB-X2) Information transfer rate: Specified indi
46、vidually for each direction of transmission- 6 -2.1) Peak cell rate: PCR(CLP=0+1) declared by the user on a per connection basis2.2) Sustainable cell rate / Maximum burst size:not applicable2.3) ABR minimum cell rate: ABR MCR declared on a per connection basis2.4) Tagging: Not allowed2.5) Frame disc
47、ard: Either allowed or not allowed3) Information transfer capability: Unrestricted4) Structure: Cell sequence integrity.6.2.4.2 Secondary information transfer attributesThe secondary information transfer attribute values for this service category shall be:5) Establishment of communication: Demand; r
48、eserved and permanent outside the scope of thisStandard6) Symmetry: Bidirectional symmetric, bidirectional asymmetric, unidirectional7) Communication configuration: Point-to-point; point to multi-point6.2.4.3 Access attributesThe access attribute values for this service category shall be:8) Access c
49、hannel: ATM virtual channel9) Access protocol: ATM layer: I.361ATM Adaptation Layer (AAL): I.363Higher layers: Application specific6.2.4.4 General attributes10) Supplementary services provided: Outside the scope of this Standard11) Quality of service: QoS class 012) Interworking possibilities: Application specific6.2.5 Bearer service using the unspecified bit rate6.2.5.1 Dominant information transfer attributesThe dominant information transfer attribute values for this service shall be:1) Information transfer mode: ATM1.1) Connection mode: Connection oriented1.2) ATM service
