1、- c PLEASE NOTE This document is normally accompanied by a disk/dish wnen purchased in hardcopy. The dislddisks contain information which would be of no value as a hardcopy document. If you require a copy of the diskldisb, please use the contact information below for your request. When submitting yo
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3、-0600 Technic3 Tz!: (O Fax: (O United Kingdom Indexes Ltd 344) 404409, Custoinet Support 34.1) 40442 I, Ccistoiner Suppori In formation Handing Senices and Teclinicai Indexer - Cortitiziad to Service Excellence ETSI ES 201 803-2-1 1.1.1 (2002-10) ETSI Standard Dynamic synchronous Transfer Mode (DTM)
4、; Part 2: System characteristics; Sub-part 1: Data link aspects 2 ETSI ES 201 803-2-1 VI .I .I (2002-10) Reference DES/SPAN-130005-1 Keywords addressing, DTM ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017
5、- NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .arq The present document may be made available in more than one electronic version or in print. In any ca
6、se of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the pr
7、esent document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at ha p:/pa rta I. etsi I a rgltbistat uslstatus .as p If you find errors in the present document, send your comment to: Co
8、ri vriaht Notifica tion No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of
9、ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI 3 ETSI ES 201 803-2-1
10、 VI . 1 . 1 (2002-10) Contents Intellectual Property Rights 7 Foreword . 7 Introduction 7 1 2 3 3.1 3.2 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.1.1 5.1.2 5.2 5.3 5.4 5.5 6 6.1 6.1.1 6.1.2 6.1.3 6.2 6.2.1 6.2.2 6.3 6.3.1 6.3.1.1 6.3.1.2 6.3.1.3 6.3.1.4 6.3.1.5 6.3.1.6 6.3.2 6.3.2.1 6.3.2.2 6.3.2.3 6.3.2.4 6.3.
11、3 6.3.3.1 6.3.3.2 6.4 6.4.1 6.4.2 6.4.3 6.4.4 6.4.5 Scope 8 References 8 Definitions and abbreviations . 8 Definitions Abbreviations Data link management system overview 10 Physical interfaces and physical links 11 Bypass chains . 11 Control Services . 13 Topology Management . 13 Resource Management
12、 . 13 Slot-O Service . 13 Functionality . 13 The Slot-O data transport . 13 Control traffic over Slot-O . 13 Characteristics 14 Addressing 14 Client Selection 14 Slot-O message and header formats 14 Bypass chain topology management 14 Bypass chain topology management overview 14 14 14 Bypass chain m
13、onitoring 15 Service interfaces 15 15 16 Detailed protocol description . 16 Establishing connections . 16 Probing phase 17 Return physical interface . 17 Detection phase . 18 Confirmation phase . 18 Distribution phase . 19 Messages distribution 19 Information Distribution Phase . 19 Information prop
14、agation 21 Ending the distribution 21 Detecting rings 21 Sending out node lists . 22 Topology calculation 22 Informing DLSPs clients 22 Informing the RXprocesses about valid return physical interfaces . 22 Messages 23 Physical interface identifiers field 23 General message format 23 DLSP-PROBE 23 DL
15、SP-PROBE-ACK . 24 DLSP-DETECTED 24 . . . . ETSI 4 ETSI ES 201 803-2-1 VI . 1 . 1 (2002-10) 6.4.6 6.4.7 6.4.8 6.4.9 6.4.9.1 6.4.10 6.4.11 6.5 6.5.1 6.5.1.1 6.5.1.2 6.5.1.3 6.5.1.3.1 6.5.1.3.2 6.5.1.3.3 6.5.1.3.4 6.5.1.4 6.5.1.4.1 6.5.1.4.2 6.5.1.4.3 6.5.1.4.4 6.5.1.5 6.5.1.6 6.5.1.6.1 6.5.1.6.2 6.5.1
16、.6.3 6.5.1.6.4 6.5.1.7 6.5.1.7.1 6.5.1.7.2 6.5.1.7.3 6.5.1.7.4 6.5.1.8 6.5.1.8.1 6.5.1.8.2 6.5.1.8.3 6.5.2 6.5.3 6.5.3.1 6.5.3.2 6.5.4 6.5.4.1 6.5.4.2 6.5.4.3 6.5.4.4 6.5.4.5 6.5.4.6 6.5.4.7 6.5.4.8 6.5.4.9 6.5.4.10 6.5.4.1 1 DLSP-DETECTEDACK 24 DLSP-CONFIRM 25 DLSP-CONFIRMACK 25 DLSP-DISTRIBUTE . 2
17、5 DLSP-DISTRIBUTE List Entries 26 DLSP-DISTRIBUTEACK . 26 DLSP-LINK-ERROR 27 SDL Descriptions . 27 Processes . 27 Relationships between processes in a node . 28 Relationships between processes in neighbouring nodes 29 29 29 29 29 30 30 30 30 31 31 31 31 Purpose 31 Operation . 31 Provided services .
18、32 Timers 32 RXprocess . 33 Purpose 33 Provided services . 34 Timers 34 BCManager . 34 Purpose 34 Timers 35 Data types . 35 Functions 35 IsBypassOk . 35 RecalcTopology 35 Constants 35 DLSPMAXHOPCOUNT 35 DLSPMAX-CONFIRM-TRIES 36 DLSPMIN-PROBE 36 DLSP-TIMEOUT-DISTRIBUTE 36 DLSP-TIMEOUT-CONFIRM-IN . 36
19、 DLSP-TIMEOUT-CONFIRM-OUT 36 DLSP-TIMEOUT-FIRSTCONFIRM-IN 36 DLSP-TIMEOUT-DETECTED 36 DLSP-PERIOD-PROBE 36 DLSP-PERIOD-CONFIRM-OUT 36 Timer values 36 Operation . 33 Operation . 34 7 Control channel management . 37 7.1 Overview 37 7.2 Void 38 7.3 DTM Control Forwarding Essential, orpotentially Essent
20、ial, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the
21、 existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This ETSI Standard (ES) has been produced by ETSI Technical Committee Services and Protocols for Advanced Networks (SPA
22、N). The present document is part 2, sub-part 1 of a multi-part deliverable covering Dynamic synchronous Transfer Mode (DTM), as identified below: Part 1: “System description“; Part 2: “System characteristics“; Sub-part 1: “Data link aspects“; Sub-part 2: “Network aspects“; Sub-part 3 : “Transport ne
23、twork and channel adaptation aspects“; Part 3: “Physical protocol“; Part 4: Part 5: Part 6: Part 7: Part 8: Part 9: Part 10: Part 11 : Part 12: Part 13: Part 14 : “Mapping of DTM frames into SDH containers“; “Mapping of PDH over DTM“; “Mapping of SDH over DTM“; “Ethernet over DTM Mapping“; “Mapping
24、of Frame relay over DTM“; “Mapping of ATM over DTM“; “Routeing and switching of IP flows over DTM“; “Mapping of video streams over DTM“; “Mapping of MPLS over DTM“; “System description of sub-rate DTM“; “Network management l. I n t rod uct ion The present document describes the architecture and prot
25、ocols of signalling and maintenance on the data link layer of the DTM system. ETSI 8 ETSI ES 201 803-2-1 VI .I .I (2002-10) 1 Scope The present document: establishes a system for bypass chain management; specifies the characteristics of bypass chain management; establishes a system for control signa
26、lling; specifies the characteristics of control signalling; establishes a system for bypass chain resource management; specifies the characteristics of bypass chain resource management. 2 Re fe re nces The following documents contain provisions which, through reference in this text, constitute provi
27、sions of the present document. References are either specific (identified by date of publication andor edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. il ETSI TR 101 287: “Servic
28、es and Protocols for Advanced Networks (SPAN); Terms and Definitions“. 3 3.1 Definitions and abbreviations De fi nit ions For the purposes of the present document, the following terms and definitions apply: access token: right to use a slot for transmitting data on a physical interface for a certain
29、 number of bypass hops address, DTM address: 64 bit numerical value that uniquely identifies a node in a DTM network NOTE: See further anycast address and multicast address. allocation domain: same as a bypass chain where, if the topology is point-to-point or bus, the last node is not counted as mem
30、ber of the AD Bypass Chain (BC): series of concatenated physical links, where data can be transported end-to-end using bypass switching bypass switching: space switching of slots from a receiver to a transmitter on the same physical interface on a per slot basis channel: set of slots allocated from
31、one source Access node to one or more destination Access nodes in a network NOTE: The source and destination Access nodes can be the same, i.e. the channel is internal to the node. channel adaptation: channel path termination function that provides an adaptation between the DTM slot based service an
32、d some other traffic service (such as word stream, bit stream or asynchronous packets) ETSI 9 ETSI ES 201 803-2-1 VI .I .I (2002-10) Channel Multiplexing Identifier (CMI): identifier by DCAP- 1 used for multiplexing packets of different protocols on a single channel control channel: channel used for
33、 DTM control signalling data channel: channel used for transport data between intenvorking functions DTM network address, DTM address: See definition of “address, DTM address“. DTM Service Type (DST): identiSling the type of intenvorking function to be associated with the channel DTM Service Type In
34、stance (DSTI): identiSling which interworking function of a specific type to be addressed by the channel physical interface address: globally unique identifier of a physical interface that is represented as a 48-bit MAC address master physical interface: physical interface in the allocation domain h
35、aving the lowest physical interface address multicast address: address used to represent all nodes belonging to a multicast group network address: an address to be used in the network layer of the IS0 OS1 model NOTE 1 : A network address may take on different forms depending on which protocol is bei
36、ng used in the network layer. NOTE 2: See also DTM network address. node: network element containing DTM functions node control channel: dynamically established control channel from one node to one or more other nodes on the same bypass chain node identity: identifier that uniquely identifies a node
37、 over a global scope ownership: responsibility to supervise an access token of a slot physical interface: interface between two equipments NOTE: AdoptedfromTR 101 287 i. physical link unidirectional connection between the transmitter of one physical interface and the receiver of another physical int
38、erface quark smallest resource unit that is one slot wide and one physical link long NOTE: Used to model dynamic resource management on a bypass chain. return physical interface: physical interface that receives reply messages from a neighbouring node switch: node that is capable of switching slots
39、from one physical interface to another slot: time slot within a frame, capable of transporting 64 bits of data or a number of special codes topology: specific physical, i.e. real, or logical, i.e. virtual, arrangement of the elements of a network NOTE: Two networks have the same topology if the conn
40、ection configuration is the same, although the networks may differ in physical interconnections, distances between nodes, transmission rates, andor signal types. ETSI 10 ETSI ES 201 803-2-1 VI .I .I (2002-10) 3.2 Abbreviations For the purposes of the present document, the following abbreviations app
41、ly: AD aTSF BC BCC CMI DCAP DCC DCFF DCP DLSP DO DPP DRP DRMP DSI DST DSTI DSYP DTM FIFO ID II QRequest QReturn SDL TDM us1 PrRPY QT Allocation Domain Trail Signal Failure action Bypass Chain Bypass Chain Change Channel Multiplexing Identifier DTM Channel Adaptation Protocol DTM Control Channel func
42、tion DTM Control Filtering and Forwarding DTM Channel Protocol DTM Link State Protocol Dynamic Ownership Detection Point Processing DTM Routing Protocol DTM Resource Management Protocol Downstream physical Interface DTM Service Type DTM Service Type Instance DTM SYnchronization Protocol Dynamic sync
43、hronous Transfer Mode First In First Out IDentity physical interface address Probe Reply Quark Request Quark Return Quark Transfer Standard Description Language Time Division Multiplex Upstream Physical interface 4 Data link management system overview A DTM network is composed of connected DTM nodes
44、. A DTM node has one instance of the DTM protocol stack, and one or several physical interfaces. The technology support TDM switching and adcUdrop/bypass switching resulting in that the physical links of the nodes can be connected forming for example rings. The nodes can then be further connected to
45、 form a meshed network consisting of for example rings, point-to-point links and buses. The present document describes the management of data links. Throughout the present document, a DTM node is drawn as in figure 1, when topologies are shown. The picture shows a DTM node named BI, with two physica
46、l interfaces, named B:l andB:2. Figure 1 : Node representation ETSI 11 ETSI ES 201 803-2-1 VI .I .I (2002-10) 4.1 Physical interfaces and physical links A physical interface has a receive side and a transmit side. One property of the physical interfaces is that time slots can be bypass switched, in
47、which data from a time slot on the receive side, is transparently copied to the same time slot on the transmit side of the physical interface. Bypass switching is default behaviour for time slots unless they are explicitly used for transmitting data on. Slot O, which is the first time slot in each D
48、TM frame, is always used for transmitting data on and is thus never bypass switched. A physical link, the smallest topological unit in a DTM network, is the direct connection from the transmit side of a physical interface to the receive side of a physical interface. In the real world, the physical l
49、ink is typically synonymous to a fibre. Since physical links are unidirectional, an arrow is used to depict the direction of data flow. Figure 2 shows DTM nodes A and B, connected with a physical link from A: 1 to B: 1. Figure 2: Physical links Some times physical interface B: 1 is said to be downstream of physical interface A: 1, and A: 1 upstream of B: 1. 4.2 Bypass chains When the physical links are connected such that data can be bypass switched in a circle, the full circle of physical links is referred to as a looped bypass chain. When
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