CN1728719B - Adaptation method in use for convergence of PDH and SDH or synchronous optical network - Google Patents

Adaptation method in use for convergence of PDH and SDH or synchronous optical network Download PDF

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CN1728719B
CN1728719B CN 200410060646 CN200410060646A CN1728719B CN 1728719 B CN1728719 B CN 1728719B CN 200410060646 CN200410060646 CN 200410060646 CN 200410060646 A CN200410060646 A CN 200410060646A CN 1728719 B CN1728719 B CN 1728719B
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邓里文
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Abstract

New layer of data link layer protocol - data link procedure (DLP) is introduced in the invention to realize syncretizing adaptation between PDH and SDH / SONET in order to overcome shortage of current adaptation technique including too many process layers, not matched interface speed, not supporting dynamic bandwidth allocation based on packets, and not compatible to IP and packet voice service etc. The method realizes interconnection of interfaces between PDH interfaces in low speed and SDH / SONET interfaces in high speed directly, and dynamic bandwidth allocation, and realizes compatibilities as described above. Using safety mechanism, network control management mechanism, flow management mechanism provided by DLP realizes security management, control management and flow management, and realizes united transmission and exchange. The method makes current communication network transits to united telecom public network in next generation smoothly.

Description

A kind of adaptation method that is used for PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network fusion
Invention field
The invention belongs to the PDH (Pseudo-synchronous Digital Hierarchy) data and transmit the field, it is a kind of adaptation method that PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge that is used for, be specially a kind of method that how on SDH (Synchronous Digital Hierarchy) (english abbreviation is SDH) or Synchronous Optical Network (english abbreviation is SONET), to transmit PDH (Pseudo-synchronous Digital Hierarchy) (english abbreviation is PDH), be mainly used in and contain PDH, any communication equipment of SDH/SONET interface such as various router (core or high-end switch router, edge or converge switch router, insert switch router), various high/medium/low end Ethernet switch based on grouping (bag) exchange, multi-service transport platform (english abbreviation is MSTP), the SDH/SONET transmission equipment, wavelength-division multiplex system (english abbreviation is WDM), the user side integrated access equipment, voice exchange and various the interconnect equipment relevant with communication.
Background technology
Since the 1980s, Fibre Optical Communication Technology has obtained large-scale application at telecommunications network, what initial this Fibre Optical Communication Technology adopted is the technology of a kind of PDH (Pseudo-synchronous Digital Hierarchy) by name (english abbreviation is PDH), but extensive application along with PDH, some intrinsic weakness that PDH exists show day by day as the whole world three kinds of zonal data signal rates and frame structure system standard, there is not global unified standard optical interface standard, cause the devices interconnect difficulty of each manufacturer etc., therefore need a kind of new tranmission techniques to replace PDH, this new tranmission techniques is exactly a SDH (Synchronous Digital Hierarchy), corresponding with SDH (Synchronous Digital Hierarchy) in the North America is Synchronous Optical Network, and what the most telecommunications backbone nets in the whole world adopted at present is the SDH/SONET technology.But, be that PDH or SDH/SONET are a kind of time-multiplexed technology, initial purpose all is to transmit a kind of tranmission techniques that adopts time division multiplexing and Circuit-switched connection-oriented traditional voice transmission to design for solving, along with the exponential volatile growth of internet service in recent years, the internet will become the main business of future communications operator and new profit growth point on the one hand, be that the internet is different with traditional voice transmission to the requirement that communication transmits network technology on the other hand, because what the internet adopted is packet switching, generally believe that now following unified public network will be a kind of network that adopts packet switching, the communication network that human 100 years development are got up is among the deep historical change, is promptly developed into by present time division multiplex network and adopts the next generation of packet switching to unify the carrier class public network.
Owing to SDH/SONET is a kind of novel tranmission techniques that designs for some defectives that solve the PDH existence, when design SDH/SONET technology, considered how on SDH/SONET, to transmit the problem of PDH signal, the compatibling problem of SDH/SONET and PDH just, ITU-T G.707 standard has worked out the standard that how can transmit the PDH signal on the SDH network, according to up-to-date ITU-T standard G.707, the current SDH standard realizes the transmission of PDH signal by defining a series of virtual container.But, because existing P DH and SDH/SONET belong to time-division multiplex technology, when design mainly is to consider that the method how to interleave by time slot makes SDH can transmit the PDH signal, because following network is a kind of network of packet switching, therefore the adaptation method of existing P DH and SDH fusion comes with some shortcomings, and is in particular in:
(1) this encapsulation technology realizes handling very complicated, current SDH encapsulates the PDH signal by defining a series of virtual container, according to up-to-date ITU-T standard G.707, the PDH signal is at first the PDH signal to be encapsulated in a kind of thing that calls container to the adaptation procedure of SDH, these containers are divided into 4 kinds, be called C-11, C-12, C-2, C-3, and then these four kinds of containers are encapsulated into the VC-11 that is referred to as virtual container respectively, VC-12, VC-2, in four kinds of virtual containers such as MC-3, and then above four kinds of virtual containers are arranged (English be Aligning) respectively to four kinds of TU-11 that are referred to as tributary unit, TU-12, TU-2, in four kinds of tributary units such as TU-3, by multiplexing these tributary signals are multiplexed in the tributary unit group (english abbreviation is TUG) then, its multiplexing method is that 4 TU-11 are multiplexed into 1 TUG2,3 TU-12 are multiplexed into 1 TUG2,1 TU-2 is multiplexed among the TUG2,1 TU3 is multiplexed into 1 TUG3, then by multiplexing among 7 multiplexing 1 TUG3 of TUG2 or the VC-3, handle by pointer again VC-3 is aligned among pointer unit (english abbreviation the is AU) AU-3, AU is multiplexed into higher pointer unit or synchronous transfer mode 0 (english abbreviation is STM-0) then, if be multiplexed into more higher leveled SDH speed grade, every rising first-rate grade just need be carried out first-order multiplexes and be handled, can realize extracting the PDH signal from SDH according to top opposite processing procedure, the entire process process is very complicated as can be seen from above processing procedure.
(2) the plurality of devices level is arranged: regenerator section, multiplex section, higher order virtual container, Lower Order Virtual Container, multiplexing level is many, the PDH signal of various low rates can not map directly to SDH signal at a high speed, can not directly from high-speed SDH/sonet signal, extract low speed PDH signal, the PDH signal processing of introducing from above as can be seen, the processing level of entire process process is many, the PDH signal of low speed can not map directly in the SDH signal frame at a high speed, can not directly extract the PDH signal from the SDH high-speed interface.
(3) speed does not match, and whole SDH link has only defined the interface rate signal of several high speeds, and can only just can reach the purpose of signal adaptation by the digital multiplex hierarchy of strictness, and the speed of various PDH interfaces and SDH interface is unmatched mutually.
(4) can not realize flexible insertion and the extraction of PDH signal in the SDH network, in existing P DH and the SDH adaptation method, insertion and the extraction of PDH signal in the SDH network realizes by network management system assignment in advance, promptly the bandwidth of each node is pre-configured in the SDH network, how many times group of insertion interface from which node, from which node isolate one several times group interface all be pre-configured, the dynamic assignment of bandwidth can not be realized, of dynamic insertion and the extraction of PDH interface signal can not be realized at the SDH network.
(5) require the network clocking precise synchronization, otherwise will reduce systematic function or thrashing.
(6) can not be compatible with internet (english abbreviation is IP) that adopts packet switching and packet voice network, adopt in the network of existing adaptation method, traditional voice service is what to be separated with the IP network business, and generally believe that now following unified public network will adopt packet-switch technology, how these adaptation methods for realizing the voice service packetizing, and how aspect such as compatible packetized voice network and IP network is without any help.
It is similar that the method for the last transmission of SONET PDH signal and SDH go up the method that transmits the PDH signal, and the last transmission of SONET PDH signal also exists SDH to go up the identical defective that transmits the PDH signal.
Summary of the invention
The objective of the invention is the deficiency of the adaptation method that merges at existing PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network and defective and design the adaptation method of a kind of novel PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network fusion; can solve defective and deficiency in existing PDH (Pseudo-synchronous Digital Hierarchy) and the SDH/SONET adaptation method on the one hand; realize the directly adaptive of PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or synchronous optical network (SDH/SONET); make the SDH/SONET network can directly transmit PDH; in addition on the one hand again can with the IP network and the packet voice Web-compatible that adopt packet-switch technology; make existing communication network be smoothly transitted into public network of future generation unified, provide powerful traffic management function for the network of PDH and SDH/SONET fusion simultaneously and comprise that 2 layers of protection switch; Topology Discovery; fault management; configuration management; performance managements etc. are in interior network control management function.
The objective of the invention is to reach: by defining a novel data link layer protocol by following measure--data link rules (english abbreviation is DLP); utilize this novel data link layer protocol to realize Internet Protocol (english abbreviation is IP) on the one hand; packet voice business and packet video business (Digital Television) are directly adaptive with various physical layer facilities; thereby realization telephone network; the integration of three networks of internet and TV network; in the unified whole communication network of data link layer; make existing communication network be smoothly transitted into unified carrier class public network of future generation; thereby comprise the fusion and adaptive the interconnected of different physical networks of realizing of the heterogeneous networks of PDH and SDH/SONET on the other hand with this novel data link layer protocol realization; the packetizing by circuit simulation realization PDH circuit signal at first when realizing the fusion of PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) (SDH) or Synchronous Optical Network (SONET) with this novel data link layer protocol; the PDH circuit simulate signal is handled as the client signal layer of this novel data link layer protocol; thereby utilize this novel data link layer protocol to realize the direct transmission of PDH (Pseudo-synchronous Digital Hierarchy) on SDH/SONET as client signal layer and the adapting protocol of the SDH/SONET that is positioned at physical layer; data link layer (DLP) and client signal interlayer communicate by letter and physical layer and data link layer (DLP layer) between communicate by letter and all realize by primitive; utilize the classification of this novel data link layer protocol frame definition; destination address and source address that the destination address sign indicating number of compatible existing telephone number system and source address sign indicating number are represented client signal; utilize the Layer 2 data link layer address to realize the two layers of forwarding and the exchange of client signal (PDH signal); the security mechanism of utilizing this new types of data link layer protocol to provide guarantees that the safety that client signal (PDH circuit simulate signal) is grouped in the network transport process transmits; send miscellaneous service data with the Frame that defines in the described new types of data link layer protocol from the upper strata; the control frame of definition is realized the Topology Discovery that comprises of network; 2 layers of protection are switched; fault management; configuration management and performance management etc. are in interior network control management, and the traffic management frame of definition is realized the traffic engineering management of network.
According to method provided by the invention; it is characterized in that; by defining a novel data link layer protocol--data link rules (english abbreviation is DLP); utilize this novel data link layer protocol to realize Internet Protocol (IP) on the one hand; packet voice business and packet video business (Digital Television) are directly adaptive with various physical layer facilities; realize speech; the integration of three networks of data (IP) and video network; in the unified whole communication network of data link layer; make existing communication network be smoothly transitted into unified carrier class public network of future generation; comprise the fusion of the heterogeneous networks of PDH and SDH/SONET on the other hand with this novel data link layer protocol realization; thereby realize the interconnected of different physical networks; it is to rely on its specific phase mutual correlation relation that begins the bit information formation in the certain-length most (constituting certain specific coding relation) to realize that the frame of described new types of data link layer protocol frame (DLP frame) is delimited; (English is Frame Length to frame length of definition in described new types of data link layer protocol frame; FL) field is used for identifying with the byte form total length of described new types of data link layer protocol frame; (English is Frame Length Check to define a frame length verification; FLC) field is used for frame length field is carried out verification and carried out single-bit error or this particular verified encoding relation that 2 bit mistake correction process utilize these two field bit to constitute simultaneously realizes that the frame of described new types of data link layer protocol frame delimits; (English is Service Type to define a type of service; ST) field is used for identifying the type of service of payload field encapsulation; thereby realize multiple services encapsulation; the type of service that regulation is different has different priority simultaneously; (English is NetworksTopology to define a topological field; NT) come the topological classification of marked network node; whether define a secure fields (English for Security) is used for identifying and the payload of encapsulation is encrypted; authentication processing; (English is Destination Address Code to the destination address sign indicating number of a classification of definition; DAC) and the source address sign indicating number (English is Source Address Code; SAC) identify the two layers of destination address and the source address of encapsulation business data packet; (English is Extension Header to define an extension header; EH) field identifies and whether payload is carried out extension process; defining a filling length field is used for representing to fill processing as payload is authenticated with the byte form; the length of filling during encryption; (English is Frame Sequence Number to define a number of frames; FSN) field is used for identifying the transmission sequence of described new types of data link layer protocol frame; (English is Security Parameter Index to define a Security Parameter Index; SPI) identify data are carried out the authenticated encryption security association that the communication two ends are set up when handling; define a payload (the English Payload of being) field and encapsulate miscellaneous service from the upper strata; define an optional padding data field and be used for encapsulating the data that to fill when encrypting and authenticating is handled; define an optional authentication data field and encapsulate the verify data that generates when payload carried out authentication processing; (English is Frame Check Sequence to define a Frame Check Sequence; FCS) field comes described new types of data link layer protocol frame is carried out verification; definition one class Frame sends the miscellaneous service data from the upper strata in described new types of data link layer protocol frame; definition traffic management frame is realized the traffic engineering management of network; the definition control frame is realized the Topology Discovery that comprises of network; 2 layers of protection are switched; fault management; configuration management and performance management etc. are in interior network control management; these three kinds of dissimilar frames are identified by the type field in the described new types of data link layer protocol frame; specific as follows: definition frame length (english abbreviation is FL) field length is 16 bits; definition frame length check field (english abbreviation is FLC) length is 15 bits; make FL and FLC field bit constitute BCH (31; 16) sign indicating number (BCH is the english abbreviation of BCH Bose-Chadhuri-Hocquengham's sign indicating number); this relation of utilizing the DLP frame realizes the frame demarcation of DLP frame and single-bit or 2 bit mistakes that FL occurs is carried out correction process; the generator polynomial of BCH (31,16) sign indicating number is G (x)=x 15+ x 11+ x 10+ x 9+ x 8+ x 7+ x 5+ x 3+ x 2+ x+1, initialization value are 0, here x 15Corresponding highest significant position (english abbreviation is MSB), x 0Corresponding least significant bit (english abbreviation is LSB), the frame that the DLP frame utilizes the specific coding of front 31 bits in the DLP frame (FL field and FLC field) to concern and realizes the DLP frame is delimited, the DLP frame is delimited process and is realized according to finite state machine, finite state machine comprises three states: search (English is HUNT) attitude, presynchronization (English is PRESYNC) attitude, (English is SYNC) attitude synchronously, the finite state machine workflow diagram is as follows: (1) is in the search attitude, DLP handles 31 bits that receive is pursued FL and the FLC relation that correct format is sought in the bit search, in this state, BCH code does not have the single-bit error of FL field and FLC field or 2 bit mistake error corrections, in case in 31 bits that receive, find correct candidate FL and FLC matching relationship value, can suppose and determine a correct DLP frame, receive presynchronization (the English PRESYNC of the being) state that enters of handling, (2) in the PRESYNC attitude, DLP handles by searching for frame by frame to handle and realizes the demarcation of DLP frame, pursue FL and the correct matching value of FLC that the bit search is found according to previous step, can suppose and search a correct DLP frame, can determine the FL and the FLC field value of next frame then according to each field relation of this frame, and determine according to their relation whether they mate, and then next frame, in case determine that continuously (DELTA is a parameter to DELTA, it be one greater than 0 positive integer) individual correct DLP frame, DLP receives to handle and enters synchronous state, otherwise, if the FL of a frame and FLC field value do not match subsequently, enter the search attitude, at this moment, BCH code does not have the single-bit error of FL field and FLC field or 2 bit mistake error corrections, enter synchronous state from the search attitude and need search DELTA+1 correct DLP frame continuously, (3) at synchronous state, DLP handles the beginning that can determine next DLP frame by the FL of a frame and FLC field relation, can realize the parsing of a frame one frame then, FLC has single-bit error or 2 bit mistake error corrections in this state, if a plurality of bits (surpassing 2 bit mistakes) mistake takes place, then frame is delimited and was lost efficacy, framing is handled and is entered the search attitude, and send client server Signal Fail (english abbreviation is SSF) indication for client's adaptation processing, (4) the empty frame of DLP participates in frame and delimits processing, and abandon the sky frame subsequently, it is relevant with the DELTA value that the DLP frame is delimited the robustness of handling, the present invention advises that the DELTA value is 1, the reserved field that length of definition is 1 bit behind FLC gives over to and uses (R field in the future, be set to 0) always, definition business type field length is 8 bits, can discern 2 altogether 8=256 kinds of types of service, wherein highest significant position is that what represented in 0 o'clock to encapsulate is the general data business (as common IP data service) of low priority, highest significant position is that the business of representing the encapsulation of DLP payload field at 1 o'clock is that the real time business of high priority is (as phone, real-time video traffic), the priority of DLP Business Processing order from high to low is followed successively by: control frame＞traffic management frame＞real time business (real-time speech, video or other real time business)＞data service (IPv4/IP v6), the business of high priority is at first handled in the formation of DLP network processes, the usage of business type field is as shown in table 1
The usage of table 1. business type field
The binary value of business type field Usage
00000000～00000011 Keep
00000100 IP v4 data
00000101 Mobile IP v4 data
00000110 IP v6 data
00000111 Mobile IP v6 data
00001000～00111111 Keep and give other data, services
01000000 The 10Mbps Ethernet
01000001 The 100Mbps Ethernet
01000010 The 10/100Mbps Ethernet
01000011 Gigabit Ethernet
01000100～01111111 Keep
10000001 Control frame
10000010 The traffic management frame
10000011 Real-time fixedly local call (local telephone) business
10000100 Real-time fixedly National calls business
10000101 Real-time fixedly international long-distance telephone business
10000110 In real time fixing local video telephone (local telephone) business
10000111 Real-time fixedly national distance visual telephone service
10001000 Real-time fixedly international long-distance visual telephone service
10001001 Landline telephone is called out local (local telephone) business that moves in real time
10001010 Landline telephone is called out mobile National calls business in real time
10001011 Landline telephone is called out international mobile long-distance telecommunications service in real time
10001100 Landline telephone is called out local mobile video telephone business in real time
10001101 Landline telephone is called out mobile national distance visual telephone service in real time
10001110 Landline telephone is called out the international long-distance visual telephone service that moves in real time
10001111 Move domestic voice service in real time
10010000 Move international voice service in real time
10010001 Move domestic visual voice service in real time
10010010 Move international visual voice service in real time
10010011 Real-time video traffic (broadcast type TV)
10010100 Real-time video traffic (unicast type TV)
10010101 Real time business based on IP v4
10010110 Real time business based on IPv6
10010111 Real time business based on mobile IPv 4
10011000 Real time business based on mobile IP v 6
10011001 G.702 PDH circuit artificial service: asynchronous circuit 1544 kilobits/second
10011010 G.702 PDH circuit artificial service: asynchronous circuit 2048 kilobits/second
10011011 G.702 PDH circuit artificial service: asynchronous circuit 6312 kilobits/second
10011100 G.702 PDH circuit artificial service: asynchronous circuit 8448 kilobits/second
10011101 G.702 PDH circuit artificial service: asynchronous circuit 34368 kilobits/second
10011110 G.702 PDH circuit artificial service: asynchronous circuit 44736 kilobits/second
10011111 G.702 PDH circuit artificial service: synchronous circuit 1544 kilobits/second
10100000 G.702 PDH circuit artificial service: synchronous circuit 2048 kilobits/second
10100001 G.702 PDH circuit artificial service: synchronous circuit 6312 kilobits/second
10100010 G.702 PDH circuit artificial service: synchronous circuit 8448 kilobits/second
10100011 G.702 PDH circuit artificial service: synchronous circuit 34368 kilobits/second
10100100 G.702 PDH circuit artificial service: synchronous circuit 44736 kilobits/second
10100101 G.702 PDH circuit artificial service: 139264 kilobits/second
10100111 G.707 SDH circuit emulation service: C-11,1648 kilobits/second
10101000 G.707 SDH circuit emulation service: C-12,2224 kilobits/second
10101001 G.707 SDH circuit emulation service: C-2,6832 kilobits/second
10101010 G.707 SDH circuit emulation service: C-3,48384 kilobits per seconds
10101011 G.707 SDH circuit emulation service: C-4,149760 kilobits per seconds
10101100 G.707 SDH circuit emulation service: VC-11,1664 kilobits per seconds
10101101 G.707 SDH circuit emulation service: VC-12,2240 kilobits/second
10101110 G.707 SDH circuit emulation service: VC-2,6848 kilobits/second
10101111 G.707 SDH circuit emulation service: VC-3,48960 kilobits/second
10110000 G.707 SDH circuit emulation service: VC-4,150336 kilobits/second
10110001 G.707 SDH circuit emulation service: TU-11,1728 kilobits per seconds
10110010 G.707 SDH circuit emulation service: TU-12,2304 kilobits per seconds
10110011 G.707 SDH circuit emulation service: TU-2,6912 kilobits per seconds
10110100 G.707 SDH circuit emulation service: TU-3,49152 kilobits per seconds
10110101 G.707 SDH circuit emulation service: AU-3,50304 kilobits per seconds
10110110 G.707 SDH circuit emulation service: AU-4,150912 kilobits per seconds
10110111 G.707 SDH circuit emulation service: STM-0,51480 kilobits/second
10111001 G.707 SDH circuit emulation service: STM-1/OC-3c, 155520 kilobits/second
10111010 G.707 SDH circuit emulation service: STM-4 OC-12c, 600080 kilobits/second
10111011 G.707 SDH circuit emulation service: STM-16 ,/OC-48c 2488320 kilobits/second
10111100 DVB, MPEG-1 transmits bit stream
10111101 DVB, MPEG-2 transmits bit stream
10111110 DVB, MPEG-4 transmits bit stream
10111111～11111111 Keep and give other real time business
Defining topological field length is 4 bits; wherein binary value " 0001 " is represented bus structures; binary value " 0010 " expression star structure; binary value " 0011 " expression tree topology; binary value " 0100 " expression ring topology; binary value " 0101 " expression grid (Mesh) topological structure; other values keep to give in the future to be used; for ring topology and network topology; the invention provides 50 milliseconds of protection switch functions; definition secure fields length is 4 bits; wherein binary value " 0000 " expression is not carried out any encryption to upper-layer service; authentication processing; binary value is represented carry out encryption from the business datum on upper strata for " 0001 "; binary value " 0010 " expression is carried out authentication processing to the business datum from the upper strata; binary value " 0100 " expression is to encrypting and authentication processing from the business datum on upper strata; other values keep in the future to be used; definition destination address code length is 64 bits; definition source address code field length is 64 bits; the destination address sign indicating number adopts identical hierarchy with the source address sign indicating number; all (English is Country Code by national code; CC); (English is National Region Code to domestic area code; NRC); (English is Node Area Code to station code; NAC) and personal code work (English is User Code; UC) 4 fields are formed; each field length is 16 bits; wherein national code is represented the first order forwarding label of upper-layer service; domestic area code is represented the second level forwarding label of upper-layer service; station code is represented the third level forwarding label of upper-layer service; personal code work is represented the fourth stage forwarding label of upper-layer service; definition header field length is 8 bits; wherein binary value does not have extension header for " 00000000 " expression; other values keep in the future to be used; it is 8 bits that length field length is filled in definition; be used for filling the length that the DLP payload field is filled when handling with byte form sign; definition frame sequence-number field length is 16 bits; be used for the described new types of data link layer protocol frame that sends is carried out sequence mark; this field value carries out sequence mark since 0 to the described new types of data link layer protocol frame that sends; up to maximum,, send the value that processor is removed register if FSN reaches maximum; and count again since 0; send to guarantee that described new types of data link layer protocol frame can be transmitted according to correct order; receive and handle, FSN also provides anti-playback simultaneously, and definition Security Parameter Index field length is 16 bits; this field is optional; its value is arbitrarily, is used in combination the security association that identifies uniquely under this DLP frame with DLP destination address sign indicating number and (Englishly is Security Association, SA); wherein the SPI value is that 0 reservation is given local; specific implementation is used; metric 1～255 is kept to using in the future by IANA (IANA is the english abbreviation of Internet Assigned Numbers Authority), and other values are determined according to the encrypting and authenticating algorithm that adopts that by communicating pair defining payload field length is 0～65535 byte; be used for encapsulating whole client signal grouping from client layer; definition padding data (this field is optional) field length is 0～255 byte, and occurrence is relevant with the encrypting and authenticating algorithm of employing, and its value is determined by the encrypting and authenticating algorithm; define the verify data that an authentication data field (this field is optional) generates when depositing authentication processing; the authentication data field value is relevant with the identifying algorithm of employing, and its value is determined (generation), definition frame verification sequence (Frame Check Sequence by concrete identifying algorithm; FCS) field length is 32 bits; be used for the payload of part header fields content in the data link layer protocol frame (DLP frame) and encapsulation is carried out verification, FCS verification scope comprises: first bit of business type field begins from the DLP frame, until the ending of DLP frame; specifically comprise business type field; the topology field; secure fields; the destination address sign indicating number; the source address sign indicating number; extension header; fill length field; number of frames; the Security Parameter Index (if there is); payload; the padding data (if there is); field bit streams such as verify data (if there is) carry out checking treatment, and checking algorithm adopts the CRC-32 of 802.3 2002 editions definition of IEEE: generator polynomial is G (x)=x 32+ x 26+ x 26+ x 23+ x 22+ x 16+ x 12+ x 11+ x 10+ x 8+ x 7+ x 5+ x 4+ x 2+ x 1+ 1, here, x 32Corresponding MSB position, and x 0Corresponding LSB position is if DLP frame generation fcs error abandons the DLP frame that makes a mistake, if some field value can not be discerned, fcs error perhaps occurs, then think invalid data link layer protocol frame, invalid frame will be dropped, do not notify transmit leg, also do not produce any action, invalid frame comprises:
(1) the DLP frame of received frame generation fcs error (FCS does not match)
(2) received frame length is less than the frame of 30 bytes
(3) frame that can not discern of business type field
(4) frame that can not discern of other fields of header
If client layer does not have signal demand to send, need fill processing at the DLP frame gap, promptly send empty frame, the purpose that sends empty frame is in order to regulate two internodal speed, empty frame sends to its adjacent nearest node from a node, neighbor node is not forwarded to any other place to it after receiving the sky frame, directly it is abandoned, do not notify transmit leg yet, the content of the empty frame of filling that sends at frame gap comprises frame length field, the frame length check field, length is the reserved field (always being set to 0) and the source address sign indicating number (station code and the personal code work field that include only in the source address sign indicating number amount to 4 bytes) of 1 bit, at transmitting terminal, must carry out scrambler to the synchronous payload encapsulation (SPE) that the DLP frame that has encapsulated client signal is encapsulated among the SDH/SONET before, before any processing of receiving terminal, at first carry out descrambling code to data link layer protocol frame (DLP frame), could be for further processing to the DLP frame behind the descrambling code, scrambler and descrambling code adopt motor synchronizing scrambler/descrambler, and its generator polynomial is G (X)=X 43+ 1.
According to method provided by the invention, it is characterized in that, with a novel data link layer protocol--data link rules (DLP) realize the fusion of PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network, thereby realize the transmission of PDH (Pseudo-synchronous Digital Hierarchy) on SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network, PDH (Pseudo-synchronous Digital Hierarchy) is handled as the client layer of DLP, at first realize the packetizing of PDH (Pseudo-synchronous Digital Hierarchy) signal by circuit simulation, the packetizing PDH signal of the output certain-length of gap periods at regular intervals, the output cycle and the block length of PDH signal are relevant with the PDH interface rate, table 2 is a kind of possible classification, should require total speed of SDH interface greater than the PDH interface rate this moment as far as possible
The length of table 2.PDH signal packets
The client signal type The block length of PDH signal (byte)
G.702 PDH 1544 kilobits/second 579
G.702 PDH 2048 kilobits/second 512
G.702 PDH 6312 kilobits/second 789
G.702 PDH 8448 kilobits/second 132
G.702 PDH 34368 kilobits/second 537
G.702 PDH 44736 kilobits/second 595
G.702 PDH 139264 kilobits/second 544
Be encapsulated into the PDH circuit simulate signal of packetizing in the payload field of described new types of data link layer protocol frame as client layer signal then; simultaneously the business type field value is set according to the PDH interface rate; source address sign indicating number and destination address sign indicating number according to the described new types of data link layer protocol of the address setting of port frame; according to the node topology type described new types of data link layer protocol frame topology field value is set; according to whether the PDH circuit simulate signal being carried out encrypting and authenticating handles the security word segment value is set; simultaneously each the described new types of data link layer protocol frame that sends is carried out sequence mark; then described new types of data link layer protocol frame is encapsulated in the SDH/SONET payload field; at first described new types of data link layer protocol frame being carried out scrambler before described new types of data link layer protocol frame is mapped to the SDH/SONET payload field handles; in network, can realize the forwarding and the exchange of PDH signal according to the destination address of described new types of data link layer protocol frame; handle the PDH circuit simulate signal that extracts packetizing at receiving terminal according to the reverse order of transmitting terminal; be reassembled as complete PDH signal according to number of frames; this moment, physical layer was SDH/SONET physical interfaces existing and whole speed ranges that may develop future; data link layer is described new types of data link layer protocol--data link rules (DLP); the service that data link layer (data link rules DLP) provides for client layer (PDH circuit simulate signal layer) is adopted and is not confirmed formula information transfer service pattern; the data that send are not done any affirmation formula operation; described new types of data link layer protocol layer passes through " data link-data-request (the English DL_DATA.request of being) " for the service that client layer provides; " data link-data-indication (English is DL_DATA.indication) "; " data link-control-request (English is DL_CONTROL.request) "; 4 primitive such as " data link-control-indication (English are DL_CONTROL.indication) " are realized; physical layer is that two primitive are passed through in the service that data link layer (DLP) provides: " physical link-data-request (the English PL_DATA.request of being) "; " physical link-data-indication (English is PL_DATA.indication) " realizes; at transmitting terminal; when the PDH circuit simulate signal need send; call DL_DATA.request (data link-data-request) primitive; this primitive comprises series of parameters; these parameters are used for determining the value of described new types of data link layer protocol frame each field of header and payload field; at receiving terminal; when described new types of data link layer protocol client entity will receive data; described new types of data link layer protocol entity activates DL_DATA.indication primitive; the accepting state of this primitive indication incoming frame and the value of each field of incoming frame; if client layer needs described new types of data link layer protocol that network control function is provided; call data link-control primitive: " data link-control-request (DL_CONTROL.request) " and " data link-control-indication (DL_CONTROL.indication) " primitive; these two primitive comprise a series of command code and parameter; can provide network control function by these two primitive; as discovering network topology; 2 layers of protection are switched; configuration management; fault management; performance management etc.; at transmitting terminal; need be when data link layer sends to physical entity as data; described new types of data link layer protocol entity activates PL_DATA.request primitive; will be when physical entity sends described new types of data link layer protocol entity at receiving terminal as data; activate PL_DATA.indication primitive, each primitive semantic as follows:
(1)DL_DATA.request(
DestinationAddressCode，
SourceAddressCode，
DLPServiceData，
FrameLength，
ServiceType，
NetworkTopology，
Security，
FrameSequeneeNumber，
SPI)
DL_DATA.request primitive contains 9 parameters, the implication of each parameter is respectively: DestinationAddressCode represents the destination address sign indicating number, with the destination address code word segment value that generates in the described new types of data link layer protocol frame header, SourceAddressCode represents the source address sign indicating number, with the source address code word segment value that generates in the described new types of data link layer protocol frame header, the client signal that DLPServiceData indicates to send is whole PDH circuit simulate signal grouping, with generating payload word segment value in the described new types of data link layer protocol frame, the FrameLength parameter determines to want the total length of described new types of data link layer protocol frame, the type of service that the ServiceType parameter indicates described new types of data link layer protocol client layer to send, it is with generating business type field value in the described new types of data link layer protocol frame header, the Security parameter indicates whether described new types of data link layer protocol client signal is encrypted, authentication processing, described new types of data link layer protocol entity is determined security word segment value in the described new types of data link layer protocol frame header with it, the number of frames (FSN) of transmit frame is wanted in the indication of FrameSequenceNumber parameter, described new types of data link layer protocol entity is determined FSN field value in the described new types of data link layer protocol frame header with it, the described new types of data link layer protocol of the network topology entity of NetworkTopology parameter indication network node is determined topological field value in the described new types of data link layer protocol frame header with it, SPI (SPI is the english abbreviation of Security Parameter Index) parameter is an option, determine client signal is encrypted if be used for, the security association of setting up at the communication two ends during authentication processing, be used for determining Security Parameter Index (SPI) field value in the described new types of data link layer protocol frame
(2)DL_DATA.indication(
DestinationAddressCode，
SourceAddressCode，
DLPServiceData，
ServiceType，
FrameLength，
ReceptionStatus，
NetworkTopology，
Security，
FrameSequenceNumber，
SPI)
DL_DATDA.indication primitive parameter semantic as follows: DestinationAddressCode represents the destination address sign indicating number, this parameter is determined the destination address code word segment value in the described new types of data link layer protocol frame header of input, SourceAddressCode represents the source address sign indicating number, this parameter is determined the source address code word segment value in the described new types of data link layer protocol frame header of input, DLPServiceData determines the described new types of data link layer protocol frame payload word segment value of input, the accepting state of ReceptionStatus indication incoming frame, if the FCS of incoming frame (Frame Check Sequence) field does not make a mistake, the value of ReceptionStatus is FCS_ERROR_FREE, otherwise, if incoming frame makes a mistake, then the ReceptionStatus value is FCS_ERROR, the business type field value of the described new types of data link layer protocol frame of ServiceType parameter indication input, the FrameLength parameter is determined the total length of the described new types of data link layer protocol frame of input, whether the described new types of data link layer protocol frame of Security parameter indication input is encrypted, authentication processing, the Security field value of the described new types of data link layer protocol frame of its indication input, the FrameSequenceNumber parameter is indicated the number of frames (FSN) of described incoming frame, topological field value in the described new types of data link layer protocol frame of NetworkTopology parameter indication input, the SPI parameter is used to refer to the Security Parameter Index field value of described incoming frame
(3) data link-control-request (DL_CONTROL.request) primitive
The form of data link-control-request (DL_CONTROL.request) primitive is a DL_CONTROL.request (command code; solicit operation ordered series of numbers table); wherein command code comprises Topology Discovery request (the English TOPOLOGY_DISCOVERY_REQ of being); 2 layers of protection switching request (English is L2PS_REQ); configuring request (English is CONFIGURATION_REQ); fault inquiry request (English is FAULT_INQUIRY_REQ); performance queries request (English is PERFORMANCE_INQUIRY_REQ) etc.; the concrete operations ordered series of numbers table of each command code is as follows: the request of Topology Discovery request operation code (TOPOLOGY_DISCOVERY_REQ) operand comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of Topology Discovery claim frame payload datas etc.; the solicit operation number of 2 layers of protection switching request (L2PS_REQ) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of 2 layers of protection switching request frame payload datas etc.; the solicit operation number of configuring request (CONFIGURATION_REQ) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of configuring request frame payload datas etc.; the solicit operation number of fault inquiry request (FAULT_INQUIRY_REQ) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of fault inquiry claim frame payload datas etc.; the solicit operation number of performance queries request (PERFORMANCE_INQUIRY_REQ) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of performance queries claim frame payload datas etc.; destination address sign indicating number in each operand; the source address sign indicating number; type of service; the isoparametric implication of number of frames is the same with data link-data-request primitive corresponding parameters implication
(4) data link-control-indication (DL_CONTROL.indication)
The form of data link-control-indication (DL_CONTROL.indication) primitive is a DL_CONTROL.indication (command code; the tabulation of indication operand); wherein command code comprises Topology Discovery response indication (the English TOPOLOGY_DISCOVERY_RESPONSE_IND of being); response indication (the English L2PS_RESPONSE_IND of being) is switched in 2 layers of protection; configuration response indication (English is CONFIGURATION_RESPONSE_IND); fault inquiry response indication (English is FAULT_INQUIRY_RESPONSE_IND); performance queries response indication (English is PERFORMANCE_INQUIRY_RESPONSE_IND) etc.; the concrete operations ordered series of numbers table of each command code is as follows: the indication operand of Topology Discovery response indication (TOPOLOGY_DISCOVERY_RESPONSE_IND) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of Topology Discovery response frame payload datas etc.; 2 layers of protection are switched response and are indicated the indication operand of (L2PS_RESPONSE_IND) command code to comprise the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of response frame payload datas etc. are switched in 2 layers of protection; the indication operand of configuration response indication (CONFIGURATION_RESPONSE_IND) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of configuration response frame payload datas etc.; the indication operand of fault inquiry response indication (FAULT_INQUIRY_RESPONSE_IND) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of fault inquiry response frame payload datas etc.; the indication operand of performance queries response indication (PERFORMANCE_INQUIRY_RESPONSE_IND) command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 5 of performance queries response frame payload datas etc.; destination address sign indicating number in each operand; the source address sign indicating number; type of service; the isoparametric implication of number of frames is the same with data link-data-indication corresponding parameters implication
(5) physical link-request of data (PL_DATA.request)
PL_DATA.request (Userdata), this primitive have only a parameter, and this parameter is a user data, and English is Userdata,
(6) physical link-data indications (PL_DATA.indication)
Q) PL_DATA.indication (Userdata), this primitive has only a parameter, and this parameter is a user data, and English is Userdata.
According to method provided by the invention, it is characterized in that, it is adaptive to realize that with described new types of data link layer protocol PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge, physical layer is SDH/SONET physical interfaces existing and whole speed ranges that may develop future, support (comprises cascade) from the Lower Order Virtual Container to the higher order virtual container whole speed ranges, can realize based on all kinds of virtual containers, the direct exchange of the circuit of the particle of all kinds of Synchronous Transfer Modes and the direct exchange of optical-fiber network light wave, wherein all kinds of virtual containers and bandwidth thereof, the payload parameter is as shown in table 3:
All kinds of virtual containers of table 3.SDH and bandwidth thereof, payload parameter
The virtual container type The virtual container bandwidth The virtual container payload
Virtual container-11 Its bandwidth is 1664 kilobits/second Payload 1600 kilobits/second
Virtual container-12 Its bandwidth is 2240 kilobits/second Payload 2176 kilobits/second
Virtual container-2 Its bandwidth is 6848 kilobits/second Payload 6784 kilobits/second
Virtual container-3 Its bandwidth is 48960 kilobits/second Payload 48384 kilobits/second
Virtual container-4 Its bandwidth is 150336 kilobits/second Payload 149760 kilobits/second
Virtual container-4-4c Its bandwidth is 601344 kilobits/second Payload 599040 kilobits/second
Virtual container-4-16c Its bandwidth is 2405376 kilobits/second Payload 2396160 kilobits/second
Virtual container-4-64c Its bandwidth is 9621504 kilobits/second Payload 9584640 kilobits/second
Virtual container-4-256c Its bandwidth is 38486016 kilobits/second Payload 38338560 kilobits/second
The interface rate of all kinds of Synchronous Transfer Modes is as shown in table 4:
The interface rate of all kinds of Synchronous Transfer Modes of table 4.SDH
The Synchronous Transfer Mode type Bit rate
sSTM-11 2880 kilobits/second
sSTM-12 5184 kilobits/second
sSTM-14 9792 kilobits/second
sSTM-18 19792 kilobits/second
sSTM-116 37444 kilobits/second
sSTM-21 7488 kilobits/second
sSTM-22 14400 kilobits/second
sSTM-24 28224 kilobits/second
STM-0 51840 kilobits/second
STM-1 155052 kilobits/second
STM-4 622080 kilobits/second
STM-16 2488320 kilobits/second
STM-64 9953280 kilobits/second
STM-256 39813120 kilobits/second
When physical layer adopted Synchronous Optical Network (SONET), all kinds of virtual containers and bandwidth thereof, payload parameter were as shown in table 5:
All kinds of virtual containers of table 5.SONET and bandwidth thereof, payload parameter
The virtual container type The virtual container bandwidth The virtual container payload
Virtual container-11 Its bandwidth is 1664 kilobits/second Payload 1600 kilobits/second
Virtual container-12 Its bandwidth is 2240 kilobits/second Payload 2176 kilobits/second
Virtual container-2 Its bandwidth is 6848 kilobits/second Payload 6784 kilobits/second
Virtual container-3 Its bandwidth is 48960 kilobits/second Payload 48384 kilobits/second
Virtual container-4 Its bandwidth is 150336 kilobits/second Payload 149760 kilobits/second
Virtual container-4-4c Its bandwidth is 601344 kilobits/second Payload 599040 kilobits/second
Virtual container-4-16c Its bandwidth is 2405376 kilobits/second Payload 2396160 kilobits/second
Virtual container-4-64c Its bandwidth is 9621504 kilobits/second Payload 9584640 kilobits/second
Virtual container-4-256c Its bandwidth is 38486016 kilobits/second Payload 38338560 kilobits/second
The interface rate of all kinds of Synchronous Transfer Modes of Synchronous Optical Network is as shown in table 6:
The interface rate of all kinds of Synchronous Transfer Modes of table 6. Synchronous Optical Network
The Synchronous Transfer Mode type Bit rate
STS-1 51840 kilobits/second
STS-3 155520 kilobits/second
STS-9 466560 kilobits/second
STS-12 622080 kilobits/second
STS-18 933120 kilobits/second
STS-24 1422160 kilobits/second
STS-36 1866240 kilobits/second
STS-48 2488320 kilobits/second
STS-192 9953280 kilobits/second
STS-768 39813120 kilobits/second
According to method provided by the invention, it is characterized in that, comprise a destination address sign indicating number (the English Destination Address Code of being in the described new types of data link layer protocol frame header, DAC) and the source address sign indicating number (English is Source Address Code, SAC), for IP operation, destination address sign indicating number and source address sign indicating number are represented the purpose IP address in the IP packet head and the forwarding equivalence class of source IP address respectively, the telephone number of representing both call sides for packet voice business purpose address code and source address sign indicating number respectively, network for the fusion of PDH and SDH/SONET, destination address sign indicating number and source address sign indicating number are represented the address of client signal (PDH circuit signal simulation) transmitting terminal and receiving terminal respectively, realize that with two layers data-link layer address two layers of client signal (PDH circuit simulate signal) are transmitted and exchange, the destination address sign indicating number adopts identical hierarchy with the source address sign indicating number, all (English is Country Code by national code, CC), (English is National Region Code to domestic area code, NRC), (English is Node Area Code to station code, NAC) and personal code work (English is User Code, UC) four parts are formed, the present invention defines the destination address sign indicating number and source address code field length is 64 bits (8 eight hytes), wherein the national code field length is 16 bits (2 eight hytes), be used for identifying certain service code of some countries or specific geographical area, CC is the first order forwarding label of upper-layer service, can there be one or more service code country or geographic area, as the voice service code, the video traffic code, IP operation code (IPv4 service code or IPv6 service code), the concrete national code value of related service is specified by relevant international standard mechanism such as ITU, domestic area code field length is 16 bits, certain regional service code in the expression a state, NRC is the second level forwarding label of upper-layer service, concrete NRC value is distributed by the communication highest administration mechanism of this state, the station code field is 16 bits, identify the service code of certain network node, this code is the third level forwarding label of upper-layer service, occurrence is specified by Virtual network operator or Internet service provider, the personal code work field length is 16 bits, the service code of representing certain user, this yard is the fourth stage forwarding label of upper-layer service, concrete UC value is specified by Virtual network operator or Internet service provider, when adopting described new types of data link layer protocol to realize the fusion of PDH and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network, the PDH circuit simulate signal is encapsulated in the described new types of data link layer protocol frame, needs according to the network integration are provided with destination address sign indicating number and source address sign indicating number, the PDH circuit simulate signal transmits processing complete the destination address sign indicating number and the source address sign indicating number according to described new types of data link layer protocol frame of network at physics subsequently, in order to reduce header overhead, can be by the type of service of the setting of the business type field in described new types of data link layer protocol frame header, destination address sign indicating number and source address sign indicating number with the new types of data link layer protocol frame described in the network of described new types of data link layer protocol realization PDH and SDH/SONET fusion can include only domestic area code, three fields of station code and personal code work or include only station code and two fields of personal code work, the transmission of PDH circuit simulate signal in network subsequently handled and can be wrapped the same processing by similar forwarding IP, during the described new types of data link layer protocol of forwarded frame, at first search the business type field in the described new types of data link layer protocol frame, determine professional priority by concrete type of service, be the national code in the destination address sign indicating number of searching in the described new types of data link layer protocol frame then, next is domestic area code, be station code once more, be personal code work at last, in case a certain item code of finding described new types of data link layer protocol frame is different with local node, network node is no longer handled destination address sign indicating number back field in the described new types of data link layer protocol frame, directly be forwarded to next node, the principle that described new types of data link layer protocol frame is transmitted is to adopt longest match principle, described can be to utilize IP routing protocol such as OSPF (the English Open Shortest Path First of being according to destination address sign indicating number decision route, OSPF) or Border Gateway Protocol (English is Border Gateway Protocol, BGP) dynamic routing table of Chan Shenging also can be that the traffic engineering of utilizing described new types of data link layer protocol to provide is come explicit configuration route.
According to method provided by the invention, it is characterized in that, described new types of data link layer protocol comprises that a cover security mechanism guarantees that the safety of upper-layer service in the network transport process transmits, concrete grammar is to realize that by upper-layer service (PDH circuit simulate signal) being encrypted with authentication processing the safety of upper layer signal transmits, if desired the PDH signal being carried out encrypting and authenticating handles, at first a series of negotiation of two ends process by communicating by letter at needs, determine the cryptographic algorithm of employing, identifying algorithm, be provided with or exchange initialization password etc., consulting operations such as encrypting and authenticating algorithm and exchange initialization password can adopt the internet security internet key exchange (english abbreviation is IKE) related and IKMP (english abbreviation is ISAKMP) and RFC2409 definition of RFC2408 definition to realize, set up two security associations (English Security Association of being then at the two ends of communication, SA), and according to purpose IP address, the algorithms that adopt etc. are determined a Security Parameter Index (english abbreviation is SPI), this index value is added in the Security Parameter Index field in the described new types of data link layer protocol frame header, SPI is used for identifying the IP bag is encrypted, security association during authentication processing, the encrypting and authenticating algorithm that Security Parameter Index identifies security association uniquely and adopted with the destination address sign indicating number, simultaneously relevant parameter such as destination address sign indicating number, the cryptographic algorithm that adopts, identifying algorithm, the initialization password, Security Parameter Indexs etc. add in the security association database, security association database has write down and security-related various data, it is 32 bits that the present invention defines the SPI field length, wherein decimal value " 0 " is used for node this locality, specific implementation is used, decimal value 1～255 is kept to using in the future by IANA, other values are used to identify security association, owing to encrypt, the different needs of identifying algorithm carries out some data and fills processing, the data of filling are positioned at after the payload field, and a length value of filling adds in the filling length field value, the verify data that authentication processing generates is positioned at after the padding data field, before the frame check field, utilize the number of frames value in the DLP frame header that anti-reproducing function is provided, when carrying out encryption, the scope of encrypting comprises the whole client signal grouping from client layer, field contents such as padding data, the scope that authenticates when carrying out authentication processing comprises the filling length field, the number of frames field, the Security Parameter Index field, payload data, field contents such as padding data.
According to method provided by the invention; it is characterized in that; described new types of data link layer protocol comprises that the perfect network control administrative mechanism of a cover realizes the Topology Discovery that comprises of network; 2 layers of protection are switched; the Link State indication; fault management; performance management; configuration managements etc. are in interior control and management; described network control management realizes by control frame; the present invention's definition represents that when the binary value of the business type field of described new types of data link layer protocol frame is " 10000001 " content that the encapsulation of data link layer protocol frame (DLP frame) payload field is carried is a network control management information; corresponding data link layer protocol frame is a control frame; described new types of data link layer protocol control frame is realized Topology Discovery; the Link State indication; fault management; performance management; network control and management functions such as configuration management; for annular and network topology; described new types of data link layer protocol control frame also provides a kind of mechanism that realizes 50 milliseconds of protection switch functions; control frame adopts TLV (Type-Length-Value; type-length-value) structure; type field length is 8 bits; be used for identifying the type of control frame; length field length is 8 bits; be used for representing the length of TLV structure intermediate value (Value) field with the byte form; what value (Value) field comprised control frame has particular contents such as related parameter; it is as shown in table 7 that the present invention defines in the control frame in the TLV structure usage of type field; wherein; what represent when type field value is binary " 00010001 " that control frame carries is OSPF (OSPF is the english abbreviation of OSPF) Routing Protocol information; control frame carries the type field binary value is BGP (BGP is the english abbreviation of Border Gateway Protocol) Routing Protocol information for " 00010010 " expression; control frame carries the type field binary value is Signaling System 7(SS-7) (english abbreviation is SS7) information for " 00010011 " expression; what the type field binary value carried for " 00010100 " expression control frame is signaling information H.323; control frame carries the type field binary value is conversation initialized protocol (english abbreviation is SIP) signaling information for " 00010101 " expression; control frame carries the type field binary value is Media Gateway Control Protocol (english abbreviation is MGCP) signaling information for " 00010110 " expression; when being binary " 11111111 ", type field represents that control frame is the self-defining management control frame of manufacturer; the self-defining management function of manufacturer comprises that equipment manufacturers are the self-defining network management control function of network management control function and operator that home built relevant devices is added; its management data content is self-defined by manufacturer; but need to adopt the TLV structure; the number of frames value of described new types of data link layer protocol control frame is used for identifying the sequencing that control frame sends; realize that the described new types of data link layer protocol control information of sign sends the function of sequence successively; the payload information field of described new types of data link layer protocol control frame can comprise a plurality of control TLV information; the realization of chip of the present invention for convenience (is generally adopted 32 as present chip; requiring the control frame total length like this is the integral multiple of 32 bits); requiring the length of The whole control frame is the integral multiple of 32 bits; if originally described new types of data link layer protocol control frame length is not the integral multiple of 32 bits; then fill processing with the byte that is 0 entirely behind control TLV, the length of filling identifies with the byte form with the filling length field of described new types of data link layer protocol control frame.
The usage of type field value in table 7. control frame (binary value)
The binary value of type field Usage
00000000 Keep
00000001 The Topology Discovery claim frame
00000010 The Topology Discovery response frame
00000011 Topology report frame
00000100 2 layers of protection switching request frame
00000101 Response frame is switched in 2 layers of protection
00000110 2 layers of protection switch status report frame
00000111 The configuring request frame
00001000 The configuration response frame
00001001 The configuration report frame
00001010 The fault inquiry claim frame
00001011 The fault inquiry response frame
00001100 The Trouble Report frame
00001101 The performance queries claim frame
00001110 The performance queries response frame
00001111 The performance report frame
00010000 WTR_Request (Wait-to-Restore claim frame)
00010001 Routing Protocol--OSPF
00010010 Routing Protocol--BGP
00010011 Signaling--Signaling System 7(SS-7) (english abbreviation is SS7)
00010100 Signaling--H.323
00010101 Signaling--conversation initialized protocol (SIP)
00010110 Signaling--Media Gateway Control Protocol (MGCP)
00010111～11111110 Keep
11111111 Manufacturer's self-defining dedicated network control and management frame
According to method provided by the invention; it is characterized in that; the network control administrative mechanism that described new types of data link layer protocol provides comprises Topology Discovery mechanism; whom Topology Discovery is used for finding out is the neighbor node of certain network node and the state of neighbor node; can find have what nodes to work on the ring with it for annular and network topology network node; the realization of topology discovery function mainly is to rely on Topology Discovery claim frame (Topology_Discovery_Request frame); Topology Discovery response frame (Topology_Discovery_Response frame) and topological Status Report Frame (Topology_State_Report frame) are realized; during installation of project stage or engineering operation; network node (as node A) with the L2 address sign indicating number of this node as destination address periodically broadcast topology find that claim frame (Topology_Discovery_Requestframe) is to other nodes (claiming that one of them is a Node B); the transmission cycle is by Topology Discovery timer (Timer_Topology_Discovery; it is programmable sending timing; default to 2 seconds) determine; all nodes (as Node B) that receive the Topology Discovery claim frame respond for node A by the Topology Discovery response frame; give node A the existence of Node B and state feedback thereof; node A adds contents such as other address of node sign indicating numbers that receive and corresponding work state in the topological address database of node A to; for annular and network topology; station code (NAC) the field value content that has artis to go up in each address of node sign indicating number according to ring is determined to encircle upward or the node sequence in the grid; if continuous 3 times (its value is programmable to node A; the default value of the present invention's definition is 3) receive the identical operations content from Node B; then think the Topology Discovery frame efficient in operation of node; relevant topological state content is write the topological database of network node; network node is reported the state of this node to other nodes (especially network management entity) with topology report frame; particularly for bus topology; star and tree-like this three class are not protected its topological state of node report of the topological structure of switch function owing to the topological structure reason; the present invention defines and represents when type field value is binary value " 00000001 " among the control frame TLV that control frame is the Topology Discovery claim frame; be the Topology Discovery response frame during binary value " 00000010 "; represent during binary value " 00000011 " that control frame is a topology report frame; the Topology Discovery claim frame; the value (Value field value) of Topology Discovery response frame and topology report frame all is two parameters; first is a node address; length is 8 bytes; second is the node operating state; length is 1 byte, and the node operating conditions is as shown in table 8.
Second parameter of table 8. Topology Discovery frame
The binary value of second parameter of Topology Discovery frame State
00000111～11111111 Keep
00000110 Forced Switch (Forced Switch, FS)
00000101 The physical signalling inefficacy (Physical Signal Fail, PSF)
00000100 The physical signalling degeneration (Physical Signal Degrade, PSD)
00000011 Manual Switch (Manual Switch, MS)
00000010 Wait-to-Restore (Wait to Restore, WTR)
00000001 Operate as normal (Operation normally) or idle (Idle)
00000000 Initialization (Initiation state)
Attention: 1. Forced Switch and Manual Switch state only are used for annular and network topology ?
According to method provided by the invention; it is characterized in that; the network control administrative mechanism that described new types of data link layer protocol provides comprises 2 layers of wrap protection; 2 layers of protection switched to refer to when the network physical link and broken down (as fibercuts) or the permission of the node device KI/K2 protocol that similar SDH ring adopts when breaking down realizes the power of self-healing recovery in 50 milliseconds; 50 milliseconds of protection switch functions provided by the invention are mainly used in annular or network topology etc. and can realize protecting on the link of switching; with two fine rings is example; (its value is programmable 20 milliseconds of times if certain network node on the ring (being assumed to node 2) is gone up in certain direction (be assumed to from node 1 to node 2 direction); the default value of the present invention definition is 20 milliseconds) in do not receive any data message and (comprise Frame; control frame; traffic management frame or empty frame etc.) or physical link breaks down (as the fracture of optical fiber facility) or node breaks down (losing efficacy or the physical signalling degeneration as physical signalling); this node enters 2 layers of protection switch status; sending 2 layers of guard mode claim frame (L2PS_Request frame) goes up coupled node (as node 1) for network (ring or network topology); node 1 also enters 2 layers of protection switch status (english abbreviation is L2PS) after receiving these 2 layers of guard mode claim frames; and send 2 layers of protection switch status report frame (L2PS_State_Report frame) and give the node that connects network management entity or be broadcast to all nodes that are in normal state on the ring; in the L2PS attitude; all packets of 2 are switched on the standby path from node 1 to node; if the fault clearance on the node 2; node 2 enters normal state; start WTR (Wait-to-Restore) timer (Timer_WTR; its value is programmable; scope is 0～1800 second; default value is 10 seconds); in case the WTR timer stops; node 2 sends WTR claim frame (WTR_Request frame) along the path before and after switching and gives node 1; node 1 returns normal state from the L2PS attitude after receiving this frame; when being binary " 00000100 ", the type field value that the present invention defines control frame represents that control frame is 2 layers of protection switching request frame; when being binary " 00000101 ", the type field value of control frame represents that control frame is that response frame is switched in 2 layers of protection; when being binary " 00000110 ", the type field value of control frame represents that control frame is that the report frame is switched in 2 layers of protection; 2 layers of protection switching request frame TLV structure intermediate value (Value; V) parameter of field has 2; first is this address of node sign indicating number; length is 8 bytes; second operating state (Forced Switch FS that parameter is this node; physical signalling inefficacy PSF; physical signalling degeneration PSD and Manual Switch); length is 1 byte; the binary value of each state is as shown in table 9; other values of this byte keep to be done to use in the future; the parameter that value field in the response frame TLV structure is switched in 2 layers of protection has two; first is this address of node sign indicating number; length is 8 bytes; second parameter length is 1 byte; wherein binary value is successfully realized switching for " 00000000 " is represented; binary value is switched unsuccessful for " 11111111 " expression; other binary values keep to using in the future; 2 layers of protection are switched and are reported that value field has three parameters in the frame TLV structure; first parameter is the address of node sign indicating number; length is 8 bytes; second parameter is the reason of switching of node; length is 1 byte; the binary value of each attitude is as shown in table 9; whether the 3rd parametric representation node is in 2 layers of guard mode; wherein binary value is in 2 layers of protection switch status for " 11111111 " expression; binary value is in normal state for " 00000000 " expression; other are worth reservation; when control frame TLV type field value is binary " 00010000 "; the expression control frame is the WTR_Request frame; the WTR_Request frame has only a parameter; length is 8 bits; value is represented successful Wait-to-Restore for binary " 11111111 ", and other are worth reservation.
The 2nd parameter type of table 9.L2PS claim frame and L2PS report frame
Binary value State
10000000 Forced Switch (Forced Switch, FS)
00100000 The physical signalling inefficacy (Physical Signal Fail, PSF)
00001000 The physical signalling degeneration (Physical Signal Degrade, PSD)
00000010 Manual Switch (Manual Switch, MS)
Other Keep
According to method provided by the invention, it is characterized in that, the network control administrative mechanism that described new types of data link layer protocol provides comprises deployment management mechanism, deployment management mechanism is used for realizing to the relevant configuring ports management of network node (DLP node) equipment, the port address of network node (DLP node) equipment must dispose one two layers address as the source address sign indicating number (SAC) of this port in the installation of project stage, the configuration management frame comprises three kinds: configuring request frame (Configuration_Request frame), configuration response frame (Configuration_Response Frame), configuration report frame (Configuration_Report frame), during installation of project stage or engineering operation, network management entity is sent the configuring request frame by network management interface to each link (port) of network node (DLP node) equipment and is configured, network node (DLP node) responds to network management entity by configuration response frame or configuration report frame, the present invention defines when type field value is binary system " 00000111 " value among the control frame TLV and represents that control frame is the configuring request frame, be the configuration response frame during binary system " 00001000 ", represent during binary system " 00001001 " that control frame is the configuration report frame, the configuring request frame comprises two parameters, first is origin node address (length is 8 bytes), second is new node address sign indicating number (length is 8 bytes), the value of configuration response frame (Value field value) comprises three parameters: first is origin node address (length is 8 bytes), second parameter is new node address sign indicating number (length is 8 bytes), the 3rd parameter length is 1 byte, wherein binary value is " 00000000 " expression configuration successful, binary value " 11111111 " expression configuration is unsuccessful, other values keep to give in the future to be used, the configuration report frame comprises two parameters: first is a node address (length is 8 bytes), second parameter length is 8 bytes, represents the configuration address of this node.
According to method provided by the invention, it is characterized in that, the network control administrative mechanism that described new types of data link layer protocol provides comprises fault management mechanism, fault management mechanism is used for realizing the fault management to network node (DLP node), fault management capability is realized by the fault management frame, the fault management frame comprises three: fault inquiry claim frame (Fault_Inquiry_Request frame), fault inquiry response frame (Fault_Inquiry_Response frame) and Trouble Report frame (Fault_Report frame), the present invention defines and represents when type field value is binary value " 00001010 " among the control frame TLV that control frame is the fault inquiry claim frame, be the fault inquiry response frame during binary value " 00001011 ", represent during binary value " 00001100 " that control frame is the Trouble Report frame, the fault inquiry claim frame comprises 1 parameter, this parameter is node address (length is 8 bytes), the value of fault inquiry response frame (Value field value) comprises two parameters: first is a node address (length is 8 bytes), second parameter length is that 1 byte is used for representing fault type, wherein binary value is physical signalling inefficacy (PSF) for " 00000000 " expression fault, binary value " 11111111 " expression fault is physical signalling degeneration (PSD), binary value is the normal fault-free of " 00001111 " expression node, other values keep to give in the future to be used, the value field of Trouble Report frame comprises two parameters: first is a node address (length is 8 bytes), second parameter length is that 1 byte is used for representing fault type, wherein binary value is physical signalling inefficacy (PSF) for " 00000000 " expression fault, binary value " 11111111 " expression fault is that physical signalling is degenerated (PSD), and other values keep to give in the future to be used.
According to method provided by the invention, it is characterized in that, the network control administrative mechanism that described new types of data link layer protocol provides comprises performance management mechanism, performance management mechanism is used for realizing the performance management to the DLP node, performance management function through performance management frames realizes, the performance management frame comprises three kinds of frames: performance queries claim frame (Performance_Inquiry_Request frame), performance queries response frame (Performance_Inquiry_Response frame) and performance report frame (Performance_Report frame), when the control frame type field value is binary " 00001101 ", the expression control frame is the performance queries claim frame, the performance queries claim frame is used for asking to inquire about certain performance index of certain DLP node, when the control frame type field value is binary " 00001110 ", the expression control frame is the performance queries response frame, the performance queries response frame is used for certain performance index of certain node that response performance query requests frame proposes, when the control frame type field value is binary " 00001111 ", the expression control frame is the performance report frame, the performance report frame is used for reporting to network management entity every performance index of certain node, the value of performance queries claim frame (Value) field comprises three parameters, first parameter is wanted the node address sign indicating number of query performance for request, length is 8 bytes, second parameter is the time measurement unit that is used for identifying calculation of performance indicators, length is 4 bits, wherein binary " 0001 " expression unit of measurement is second, binary " 0010 " expression unit of measurement is minute, binary " 0011 " expression unit of measurement is hour, binary " 0100 " expression unit of measurement is the sky, other field values keep to using in the future, the 3rd parameter is the performance index type, length is 4 bits, wherein binary " 0001 " expression performance index are Frame Check Sequence mistake number, binary " 0010 " expression number of dropped packets, binary " 0011 " expression packet loss, the time delay (time delay) of binary " 0100 " expression bag, other values keep to give in the future to be used, the value of performance queries response frame (Value) field comprises 4 parameters, first parameter length is 8 bytes, be used for representing node address that the performance queries claim frame is responded, second parameter length is 4 bits, be used for identifying the time measurement unit of calculation of performance indicators, the 3rd parameter length is that 4 bits are used for identifying the performance index type, the 4th parameter length is 3 bytes, be used for representing the performance index value that specifically will inquire about, the value of performance queries response frame (Value) field second the same with the usage of second and the 3rd parameter of value (Value) field of performance queries claim frame with the usage of the 3rd parameter (time measurement unit and performance index type), the value of performance report frame (Value) field comprises 4 parameters, first parameter length is 8 bytes, be used for representing to send the node address of performance report frame to network management entity, second parameter length is 4 bits, be used for identifying the time measurement unit of calculation of performance indicators, the 3rd parameter length is that 4 bits are used for identifying the performance index type, the 4th parameter length is 3 bytes, be used for representing the performance index value that specifically will report, the value of performance report frame (Value) field second the same with the usage of second and the 3rd parameter of value (Value) field of performance queries claim frame with the usage of the 3rd parameter (time measurement unit and performance index type).
According to method provided by the invention, it is characterized in that described new types of data link layer protocol provides powerful traffic management mechanism to realize the traffic engineering of network, method is that at first convection current is classified through all business of network, promptly to the miscellaneous service (speech from the upper strata, the IP data, Digital Television, the ethernet mac frame, TDM circuit simulation signals etc.) carrying out priority classification is divided into the business of high priority and the business of low priority, with classification be positioned at two layers data-link layer address (source address sign indicating number and destination address sign indicating number) expression upper-layer service address (destination address and source address) simultaneously to business according to belonging to which country or geographic area, which area of certain country or geographic area, certain node in certain area, certain user of certain node carries out the classification of countries, thereby represents that with the L2 address of classification physical link port L2 address carries out the classification of countries to physical resource, distributes different band width in physical links to be used to transmit dissimilar business simultaneously, the miscellaneous service of the whole network of flowing through is mapped on the actual physical link according to different priority type and region classification, realize the flow and the band width in physical resource of whole network are unified dispatching management and monitoring by the traffic management frame, specific as follows: at first to from data link layer--all business of the above level of DLP layer are classified, and are divided into the business of high priority and the business of low priority, the business packet includes network managing control information (control frame) of high priority, traffic management information (traffic management frame), various real-time voice services (comprising fixing or mobile voice or video telephone), various real-time videos (Digital Television), real time business based on IP (IPv4/IPv6), PDH and SDH/SONET circuit simulation signal, the business of low priority is general IP data service, and concrete various types of traffic identifies with the business type field value in the described new types of data link layer protocol frame, has defined the destination address sign indicating number and the source address sign indicating number of a classification in described new types of data link layer protocol frame, the destination address sign indicating number adopts identical structure with the source address sign indicating number, all by national code, domestic area code, station code and personal code work four parts are formed, and are used for identification service respectively to belong to which country or geographic area, which area in certain country or the geographic area, which node in certain area, which user of which intranodal, for IP operation, destination address sign indicating number and source address sign indicating number are represented the purpose IP address in the IP packet head and the forwarding equivalence class of source IP address respectively, represent the telephone number of both call sides respectively for voice service destination address sign indicating number and source address sign indicating number, the address of representing digital television signal transmitting terminal and receiving terminal for Digital Television (digital video) business purpose address code and source address sign indicating number respectively, for the application of Ethernet and SDH/SONET or Ethernet and PDH fusion, ethernet mac frame, adopt the circuit such as the PDH of Time Division Multiplexing technology, business purpose address code such as the circuit simulation signal of SDH/SONET and source address sign indicating number are represented the address of signal sending end and receiving terminal respectively, the application of merging for PDH and SDH/SONET, destination address sign indicating number and source address sign indicating number are represented the address of the transmitting terminal and the receiving terminal of PDH circuit simulate signal respectively, like this by data-link layer address to miscellaneous service (speech from the upper strata, data, video, Ethernet and TDM circuit simulation signal) carried out the classification of region, miscellaneous service according to different countries or geographic area, certain area in particular country or the geographic area, certain node in the area, certain user of certain node classifies, and simultaneously each node port (each light wave that comprises wavelength-division multiplex system) of whole physics transmission network is identified one two layers data-link layer address, and the different link of regulation is used to transmit business dissimilar and that lead to different regions, like this bandwidth resources of whole physics transmission network are classified, some bandwidth is used to transmit important real time business such as speech and real-time video, and some is used to transmit general IP data service, some bandwidth link is used to transmit international business, some bandwidth link is used to transmit business transprovincially, and some bandwidth link is used to transmit local service, and if network break down allow to transmit the IP data link by the service occupation of high priority, traffic management frame by the present invention's definition is monitored processing to the flow and the network bandwidth resources of whole network, network management system comprises a traffic engineering database, this data-base recording the link circuit resource distribution situation of whole network, flow through the type of service of network, the overall budget number, total flow, physical link speed, allow parameters such as maximum transfer rate, the present invention's definition is when the business type field value is set to binary value " 10000010 " in the described new types of data link layer protocol frame header, what represent described new types of data link layer protocol frame encapsulation is traffic management information, and corresponding data link layer protocol frame is the traffic management frame, and the traffic management information of traffic management frame adopts type-length-value, and (English is Type-Length-Value, TLV) structure, wherein, type field length is 8 bits, is used to refer to the type of traffic management frame, length field length is 8 bits, be used for length with byte form indicated value (Value) field, value (Value) field comprises concrete traffic management content frame, and the usage of network management frame type field is as shown in table 10, what represent when wherein type field value is binary " 00000001 " among the traffic management frame TLV that traffic management frame payload carries is link traffic flow attribution information, its value (Value) field contents comprises four parameters, and first parameter is a node address, and length is 8 bytes, second parameter is type of service, be used for expression through the type of service under certain node flow bag (grouping), and length is 1 byte, and the service class offset of dissimilar business is determined by table 1, the 3rd parameter length is that 1 byte is used for identifying the measuring parameter type that flows through certain node link flow, wherein binary value is peak rate (unit is a bits per second) for " 00000001 " expression flow measurement parameter type, and binary value is Mean Speed (unit is a bits per second) for " 00000010 " expression flow measurement parameter type, and binary value is that " 00000011 " expression flow measurement parameter type is maximum bag (grouping) number (unit is the bag per second), binary value is average packet (grouping) number (unit is the bag per second) for " 00000100 " expression flow measurement parameter type, binary value is peak value burst length (unit is a byte) for " 00000101 " expression flow measurement parameter type, and binary value is agreement burst length (unit is a byte) for " 00000110 " expression flow measurement parameter type, and binary value is burst excess length (unit is a byte) for " 00000111 " expression flow measurement parameter type, other values keep to give in the future to be used, the 4th parameter length is the value that 4 bytes are used for identifying concrete various flows, represents the Resource Properties of various physical links when type field value is binary system " 00000100～00100111 " among the traffic management frame TLV, and the types value of various concrete links is as shown in table 10, the source attribute values of various physical links includes four parameters, first parameter is a node address, and length is 8 bytes, and second parameter is type of service, be used for expression through the type of service under certain node flow bag (grouping), length is 1 byte, and the service class offset of dissimilar business determines that by table 1 the 3rd parameter length is that 1 byte is used for identifying the measuring parameter type that flows through certain node link flow, wherein binary value is peak rate (unit is a bits per second) for " 00000001 " expression flow measurement parameter type, binary value is Mean Speed (unit is a bits per second) for " 00000010 " expression flow measurement parameter type, and binary value is that " 00000011 " expression flow measurement parameter type is maximum bag (grouping) number (unit is the bag per second), and binary value is average packet (grouping) number (unit is the bag per second) for " 00000100 " expression flow measurement parameter type, binary value is peak value burst length (unit is a byte) for " 00000101 " expression flow measurement parameter type, binary value is agreement burst length (unit is a byte) for " 00000110 " expression flow measurement parameter type, and binary value is burst excess length (unit is a byte) for " 00000111 " expression flow measurement parameter type, and other values keep to give in the future to be used, the 4th parameter length is the value that 4 bytes are used for identifying concrete various flows, the number of frames value of described new types of data link layer protocol traffic management frame is used for identifying the sequencing that the traffic management frame sends, and realizes that the described new types of data link layer protocol flow control management information of sign sends the function of sequencing, and the payload information field of described new types of data link layer protocol traffic management frame can comprise a plurality of traffic management TLV information, the realization of chip of the present invention for convenience (is generally adopted 32 as present chip, requiring traffic management frame total length like this is the integral multiple of 32 bits), the length that requires whole traffic management frame is the integral multiple of 32 bits, if original described new types of data link layer protocol traffic management frame length is not the integral multiple of 32 bits, then fill processing with the byte that is 0 entirely behind traffic management TLV, the length of filling identifies with the byte form with the filling length field of described new types of data link layer protocol traffic management frame.
The usage of table 10. traffic management frame type field
The binary value of type field Usage
00000000 Keep
00000001 The link flow attribute
00000010 10Mbps ethernet link attribute
00000011 100Mbps ethernet link attribute
00000100 10/100Mbps ethernet link attribute
00000101 The gigabit ethernet link attribute
00000110 10Gb/s ethernet link attribute
00000111 STM-0 SDH link attribute
00001000 STM-1/OC-3c SDH link attribute
00001001 STM-4/OC-12c SDH link attribute
00001010 STM-16/OC-48c SDH link attribute
00001011 STM-64/OC-192c SDH link attribute
00001100 STM-256/OC-768c SDH link attribute
00001101 64 kilobits/second physical link attributes
00001110 1544 kilobits/second PDH link attributes
00001111 2048 kilobits/second PDH link attributes
00010000 6312 kilobits/second PDH link attributes
00010001 8448 kilobits/second PDH link attributes
00010010 34368 kilobits/second PDH link attributes
00010011 44736 kilobits/second PDH link attributes
00010100 139264 kilobits/second PDH link attributes
00010101 IEEE 802.11a link attribute
00010110 IEEE 802.11b link attribute
00010111 IEEE 802.11g link attribute
00011000 IEEE 802.11h link attribute
00011001 The GSM link attribute
00011010 IEEE 802.16a (2-11GHz) link attribute
00011011 IEEE 802.16c (10-66GHz) link attribute
00011100 The WCDMA link attribute
00011101 The TD-SCDMA link attribute
00011110 The CDMA2000 link attribute
00011111 The DVB link attribute
00100000 The MPEG-1 link attribute
00100001 The MPEG-2 link attribute
00100010 The MPEG-3 link attribute
00100011 The isdn link attribute
00100100 The adsl link attribute
00100101 The VDSL link attribute
00100110 Other xDSL link attributes
00100111～11111111 Keep
With respect to the adaptation method of existing PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network fusion, the present invention has following innovation:
(1) handles simply.The method that existing P DH and SDH/SONET merge implements very complicated, current SDH encapsulates the PDH signal by defining a series of virtual container, according to up-to-date ITU-T standard G.707, the PDH signal is at first the PDH signal to be encapsulated in a kind of thing that calls container to the adaptation procedure of SDH, these containers are divided into 4 kinds, be called C-11, C-12, C-2, C-3, and then these four kinds of containers are encapsulated into the VC-11 that is referred to as virtual container respectively, VC-12, VC-2, in four kinds of virtual containers such as VC-3, and then above four kinds of virtual containers are arranged (English be Aligning) respectively to four kinds of TU-11 that are referred to as tributary unit, TU-12, TU-2, in four kinds of tributary units such as TU-3, by multiplexing these tributary signals are multiplexed in the tributary unit group then, its multiplexing method is that 4 TU-11 are multiplexed into 1 TUG2,3 TU-12 are multiplexed into 1 TUG2,1 TU-2 is multiplexed among the TUG2,1 TU3 is multiplexed into 1 TUG3, then by multiplexing among 7 multiplexing 1 TUG3 of TUG2 or the VC-3, handle by pointer again VC-3 is aligned among the pointer unit AU-3, AU is multiplexed into higher pointer unit or synchronous transfer mode 0 (english abbreviation is STM-0) then, if be multiplexed into more higher leveled SDH/SONET speed grade, every rising first-rate grade just need be carried out first-order multiplexes and be handled, can from the SDH/SONET frame, extract the PDH signal at receiving terminal according to above-mentioned opposite step, the entire process process is very complicated as can be seen from above processing procedure, realize packetizing and adopt method provided by the invention only to need that the PDH signal is carried out circuit simulation, be mapped to the DLP frame then, the DLP frame being mapped to only needs in the SDH/SONET payload field DLP grouping (frame) is handled subsequently again, obtains having simplified the processing level.
(2) the processing level is few, can realize direct insertion and the extraction of various PDH signals to SDH/SONET speed grade at different levels.The plurality of devices level is arranged: regenerator section, multiplex section, higher order virtual container, Lower Order Virtual Container in the method that existing P DH and SDH/SONET merge, multiplexing level is many, the PDH signal of various low rates can not map directly to signal at a high speed, the processing procedure that PDH from above is multiplexed into SDH as can be seen, the processing level of entire process process is many, the PDH signal of low speed can not map directly in the SDH signal frame at a high speed, can not directly extract the PDH signal from the SDH/SONET high-speed interface.And adopt method provided by the invention, and realize packetizing by the PDH signal being carried out circuit simulation, can realize of insertion and the extraction of various PDH signals to SDH/SONET speed grade at different levels.
(3) realize packet-based Dynamic Bandwidth Allocation, realize the coupling of PDH and SDH/SONET interface rate.Method PDH and SDH/SONET interface rate that existing P DH and SDH/SONET merge do not match, whole SDH link has only defined the interface rate signal of several high speeds, and can only just can reach the purpose of signal adaptation by the digital multiplex hierarchy of strictness, the speed of various PDH interfaces and SDH/SONET interface is unmatched mutually.And adopt method provided by the invention, and realizing packetizing by the PDH signal being carried out circuit simulation, can realize the coupling of PDH and SDH/SONET interface rate realizing packet-based Dynamic Bandwidth Allocation.
(4) realize flexible insertion and the extraction of PDH signal in the SDH/SONET network.In existing P DH and the SDH/SONET adaptation method, insertion and the extraction of PDH signal in the SDH/SONET network realizes by network management system assignment in advance, promptly the bandwidth of each node is pre-configured in the SDH/SONET network, how many times group of insertion interface from which node, from which node isolate one several times group interface all be pre-configured, the dynamic assignment of bandwidth can not be realized, of dynamic insertion and the extraction of PDH interface signal can not be realized at the SDH/SONET network.And adopt method provided by the invention, by the packetizing of PDH circuit The Realization of Simulation PDH signal,, can realize flexible insertion and the extraction of PDH signal in the SDH/SONET network by the dynamic management of network traffics.
(5) it is synchronous to need not network clocking.The method that existing P DH and SDH/SONET merge requires the network clocking precise synchronization, otherwise will reduce systematic function or thrashing.And adopt method provided by the invention, employing be packet-switch technology but not time-division multiplex technology, it is synchronous to need not network clocking.
(6) realize and the IP network that adopts packet switching and the compatibility of packet voice network.The adaptation method that existing P DH and SDH/SONET merge can not be compatible with IP network that adopts packet switching and packet voice network, adopt in the network of existing adaptation method, traditional voice service is what to be separated with the IP network business, and generally believe that now following unified public network will adopt packet-switch technology, how these adaptation methods for realizing the voice service packetizing, how compatible packetized voice professional with aspect such as IP network without any help.And adopt method provided by the invention, can realize and adopt the IP network of packet switching and the compatibility of packet voice network, method is that the business type field in the DLP frame has identified different types of service, and destination address sign indicating number in the DLP frame and source address sign indicating number are represented the purpose IP address in the IP packet head and the forwarding equivalence class of source IP address respectively for this destination address sign indicating number of IP operation and source address sign indicating number, for the packet voice business, destination address sign indicating number in the DLP frame and source address sign indicating number are represented the telephone number of both call sides respectively, and the network that merges for PDH and SDH/SONET, destination address sign indicating number in the DLP frame and source address sign indicating number are represented the L2 address of PDH or SDH/SONET port respectively.
Description of drawings
Further specify characteristics of the present invention below in conjunction with accompanying drawing and example.
Fig. 1 is adopted service model (conception schematic diagram) by the present invention
Fig. 2 is used for the protocol stack structure schematic diagram that Synchronous Transfer Mode transmits PDH for the present invention
Fig. 3 is used for the protocol stack structure schematic diagram that the subclass Synchronous Transfer Mode transmits PDH for the present invention
Fig. 4 is the protocol stack arrangement example schematic of networking of the present invention
The DLP data frame structure that is used to transmit the PDH circuit simulate signal that Fig. 5 adopts for the present invention
The DLP control frame structure that Fig. 6 adopts for the present invention
The DLP traffic management frame structure that Fig. 7 adopts for the present invention
Fig. 8 delimits the finite state machine figure that mode adopted for the frame of DLP frame of the present invention
Destination address sign indicating number and source address code structure that Fig. 9 adopts for the present invention
The empty frame structure of DLP that Figure 10 adopts for the present invention
Figure 11 is usefulness (X proposed by the invention 43+ 1) schematic diagram of multinomial scrambler and descrambling code
The PDH circuit simulate signal grouping conveying network figure that Figure 12 proposes for the present invention
Figure 13 shows that traffic engineering schematic diagram of the present invention
The applicating example that the PDH that Figure 14 proposes for the present invention moves on circuit simulation signal SDH/SONET
The order of communication is earlier from left to right in all DLP frame block diagrams of the present invention's definition, then from top to bottom, at first transmit highest significant position in each byte, leftmost bit is highest significant position (MSB) in all block diagrams, rightmost bit is least significant bit (LSB), and the reserved word segment value is 0 in all block diagrams.
Figure 1 shows that service model that the present invention adopts (conception schematic diagram), in this framework, Physical layer is SDH (SDH) or Synchronous Optical Network (SONET), mainly comprise all kinds of high-orders and Lower Order Virtual Container, data link layer is data link rules (english abbreviation is DLP), the PDH circuit simulate signal is positioned at the client layer of DLP, data link layer (DLP) is passed through four primitive to the service that its client layer (PDH circuit simulate signal) provides: data link-data-request (the English DL_DATA.request of being), data link-data-indication (English is DL_DATA.indication), data link-control-request (English is DL_CONTROL.request), data link-control-indication (English is DL_CONTROL.indication) realizes, wherein data link-data primitive provides the network control service for client layer provides data delivery service data link-control primitive, at transmitting terminal, if client layer has the PDH circuit simulate signal to need to send, then call DL_DATA.request primitive, this primitive comprises a series of parameter, determined the value of the relevant field of DLP frame by the parameter of this primitive, at receiving terminal, as packet (grouping of PDH circuit simulate signal) in the time of need to being sent to the upper strata, the DLP entity calls DL_DATA.indication primitive, utilize the parametric solution of this primitive to separate out each field value of DLP frame, if client layer needs data link layer that the control service is provided, call DL_CONTROL.request and DL_CONTROL.indication primitive, communicating by letter by two primitive between data link layer and Physical layer: physical link-request of data (PL_DATA.request) and physical link-data-indication (PL_DATA.indication) realize.
Figure 2 shows that the present invention is used for the protocol stack structure schematic diagram that Synchronous Transfer Mode transmits the grouping of PDH circuit simulate signal, wherein below DLP, two kinds of methods of putting into virtual container are arranged, a kind of is that the DLP frame is put into Lower Order Virtual Container, the mode that again Lower Order Virtual Container is interleave with byte is advanced higher order virtual container by the multiplexing structure of SDH is multiplexing, according to multiplex section, the order of regenerator section and photoelectricity transmission section transmits, and then extracts the DLP frame by opposite order at receiving terminal again; Another kind is that the synchronous payload that higher order virtual container is advanced in the direct mapping of DLP frame is sealed (english abbreviation SPE), and again according to multiplex section, the order of regenerator section and photoelectricity transmission section transmits, and then extracts the DLP frame by opposite order at receiving terminal.
Fig. 3 is that the present invention is used for the protocol stack structure schematic diagram that the subclass Synchronous Transfer Mode transmits the grouping of PDH circuit simulate signal, in this mode, only the DLP frame is put into Lower Order Virtual Container (VC11, VC12, VC2,) mode that again Lower Order Virtual Container interleave with byte advances the subclass multiplex section by the subclass multiplexing structure of SDH is multiplexing, order through regenerator section and photoelectricity transmission section transmits, and then extracts the DLP frame by opposite order at receiving terminal.
Fig. 4 is the protocol stack arrangement example schematic of networking of the present invention, situation shown in Figure 4 is that the PDH interface inserts the inlet side of another one PDH interface and the protocol stack arrangement that goes out to hold by SDH/SONET, dispose two kinds of physical interfaces of PDH and SDH/SONET in the inlet side, realize the packetizing of PDH signal by circuit simulation, the PDH signal assemble after the packetizing to the DLP frame, then the DLP frame is encapsulated in the SDH/SONET payload, the subsequently transmission of PDH signal in network processed and realized according to the DLP frame, be reduced to original PDH signal, the fusion of " PDHover SDH/SONET " expression PDH and SDH or Synchronous Optical Network going out end.
Figure 5 shows that the DLP data frame structure that is used for transmitting the grouping of PDH circuit simulate signal that the present invention adopts, the DLP Frame is by frame length (FL), frame length verification (FLC), R field (reserved field of 1 bit), business type field, the topology field, secure fields, the destination address code, the source address code, extension header, fill length field, the number of frames field, Security Parameter Index, payload field, the padding data field, the field such as authentication data field and Frame Check Sequence forms, Security Parameter Index wherein, padding data field and authentication data field are options, by the authentication of adopting, AES is determined, the order of communication is earlier from left to right in all block diagrams, then from top to bottom, at first transmit highest significant position (MSB) in each byte, leftmost bit in all illustration block diagrams is highest significant position, rightmost one is least significant bit (LSB), and the reserved word segment value in all block diagrams is 0.
The DLP Control signal frame that Fig. 6 adopts for the present invention, the DLP control frame is by frame length, the frame length verification, R field (1 bit reserved field, be set to 0), type of service, the topology field, secure fields, the destination address code, the source address code, extension header, fill length field, number of frames, the fields such as payload information field and Frame Check Sequence field form, frame length wherein, the frame length verification, R field (1 bit reserved field), type of service, the topology field, secure fields, the destination address code, the source address code, the field lengths such as number of frames are the same with the DLP Frame, the extension header value is 0 (binary value is 00000000), the business type field value be the encapsulation of binary system " 10000001 " expression DLP payload field be control information, type-length-value (TLV) structure is adopted in control information.
The DLP traffic management frame structure that Fig. 7 adopts for the present invention, DLP traffic management frame is by frame length, the frame length verification, R field (1 bit reserved field, be set to 0), type of service, the topology field, secure fields, the destination address code, the source address code, extension header, fill length, number of frames, the fields such as payload information field and Frame Check Sequence field form, frame length wherein, the frame length verification, R field (reserved field), type of service, the topology field, secure fields, the destination address code, the source address code, the field lengths such as number of frames are the same with the DLP Frame, the header field value is 0 (binary value is 00000000), the business type field value is that binary system " 10000010 " expression DLP payload is traffic management information, and traffic management information adopts type-length-value (TLV) structure.
The finite state digraph that the frame key-machine of the DLP frame that Fig. 8 adopts for invention adopts, the DLP frame of the present invention's definition adopts the frame based on header error verification (english abbreviation is HEC) that adopts among the ATM of definition in the similar ITU-TI.432.1.1 suggestion to delimit describing method, the 31 initial bits that utilization receives are that FL and FLC field bit consist of BCH (31,16) encoding relation of code is realized the frame demarcation of DLP frame, the DLP frame is delimited the description algorithm and is determined by finite state machine figure, the finite state machine workflow diagram is as follows: (1) is in the search attitude, DLP processes 31 bits that receive is pursued FL and the FLC relation that correct format is sought in the bit search, in this state, BCH code does not have the single-bit error of FL field and FLC field or 2 bit error correction functions, in case in 31 bits that receive, find correct candidate FL and FLC matching relationship value, can suppose and determine a correct DLP frame, reception ﹠ disposal enters presynchronization (the English PRESYNC of being) state, (2) in the PRESYNC attitude, DLP processes by searching for frame by frame to process and realizes the demarcation of DLP frame, pursue FL and the correct matching value of FLC that the bit search is found according to previous step, can suppose and search a correct DLP frame, can determine then FL and the FLC field value of next frame according to each field relation of this frame, and determine according to their relation whether they mate, and then next frame, in case determine that continuously (DELTA is a parameter to DELTA, it be one greater than 0 positive integer) individual correct DLP frame, the DLP reception ﹠ disposal enters synchronous state, otherwise, if the FL of a frame and FLC field value do not mate subsequently, enter the search attitude, at this moment, BCH code does not have single-bit error or the 2 bit error correction functions to FL field and FLC field. Enter synchronous state from the search attitude and need to search continuously DELTA+1 correct DLP frame, (3) at synchronous state, DLP processes the beginning that can determine next DLP frame by the FL of a frame and FLC field relation, can realize then parsing one by one, FLC has single-bit error or 2 bit mistake error corrections in this state, if a plurality of bits (surpassing 2 bit mistakes) mistake takes place, then frame is delimited and was lost efficacy, framing processing enters the search attitude, and send client server Signal Fail (english abbreviation is SSF) indication for client's adaptation processing, (4) empty DLP frame participates in frame and delimits processing, and abandon subsequently the sky frame, it is relevant with the DELTA value that the DLP frame is delimited the robustness of processing, and the present invention advises that the DELTA value is 1.
Destination address code and source address code structure that Fig. 9 adopts for the present invention, destination address code and source address code are used for respectively representing destination address and the source address of DLP client signal, the coding structure of source address code is identical with the destination address code, the length of destination address code (english abbreviation is DAC) is 64 bits (8 eight hytes), be used for identifying the purpose forwarding address of DLP frame in the network that adopts DLP, the DAC field is made up of following 4 parts: national code field, domestic area code, station code, personal code work. Wherein: the national code field length is 16 bits (2 eight hytes), this yard is the first order forwarding label of DLP frame, domestic area code field length is 16 bits, this yard is the second level forwarding label of DLP frame, the station code field is 16 bits, identify the service code of certain network node, this yard is the third level forwarding label of DLP frame, occurrence is specified by Virtual network operator or Internet service provider, the personal code work field length is 16 bits, indicate certain user's service code, this yard is the fourth stage forwarding label of DLP frame, and concrete UC value is specified by Virtual network operator or Internet service provider.
The empty frame structure of DLP that Figure 10 adopts for the present invention, the purpose that sends empty frame is in order to regulate two internodal speed, the adjacent node that it sends to from a node that it links to each other, neighbor node is not forwarded to any other place to it after receiving the sky frame, directly it is abandoned, the empty frame of DLP is by frame length field (16 bit), frame length check field (15 bit), reserved field (the R field that length is 1 bit, be set to 0), including only station code and personal code work field length is the source address code composition of 4 bytes.
Figure 11 shows that usefulness (X proposed by the invention43+ 1) schematic diagram of multinomial scramble and discramble code, D1 represents the 1st to 43 of register among the figure to D43, the part that empty frame fences up represents 43 bit shift registers, garden circle part represents an XOR circuit, according to the logical relation among the figure, at transmitting terminal, can finish the scrambler function to the DLP frame from " the data flow input before the scrambler " to " the data flow output behind the scrambler "; At receiving terminal, can finish the descrambling code function from " input of scrambler data flow " to " the data flow output behind the descrambling code "; The shift register that also can from D1 to D43, be shifted, but corresponding logical relation also should adjust.
Figure 12 transmits schematic diagram for the PDH circuit simulate signal that the present invention proposes at the network of the PDH that realizes with DLP and SDH/SONET fusion, dark round spot represents fringe node among the figure, white circle represents core node, behind the network edge node access user, according to the country under the interface IP address that arranges, which area, the processing of classifying of which node, and destination address code and source address code value be filled in destination address code and the source address code field, simultaneously whole PDH circuit simulate signal packet map in the payload field of DLP frame, subsequently, whole network only need utilize the forwarding of the destination address code realization PDH circuit simulate signal grouping (being encapsulated in the DLP frame) in the DLP frame header; During forward process, search at first in regular turn the national code in the DLP frame destination address code, domestic area code, station code, personal code work, the present invention adopts longest match principle that the DLP frame is carried out forward process, in case find that a certain field value of destination address code of DLP frame is different from local node corresponding field value, then stop search, directly transmit this packet.
Figure 13 shows that traffic engineering schematic diagram of the present invention, there are many transfer paths in Guangzhou among the figure to Beijing, in normal circumstances, Guangzhou is through Guangzhou-Wuhan-path, Pekinese to Pekinese's flow, shown in solid arrow line among the figure, if but Guangzhou-Wuhan-circuit appearance in Beijing is congested, and Guangzhou-Shanghai-Pekinese's line idle, can transfer to service traffics on Guangzhou-Shanghai-Beijing circuit this moment, shown in the dotted arrow line among the figure.
Embodiment
Method provided by the invention is mainly used in and contains PDH, any communication equipment of SDH/SONET interface such as various router (core or high-end switch router, edge or converge switch router, insert switch router), various high/medium/low end Ethernet switch based on grouping (bag) exchange, multi-service transport platform (english abbreviation is MSTP), the SDH/SONET transmission equipment, wavelength-division multiplex system (english abbreviation is WDM), the user side integrated access equipment, voice exchange and various the interconnect equipment relevant with communication.The applicating example that the PDH circuit simulate signal that Figure 14 proposes for the present invention moves on SDH/SONET, wherein adapter represents to adopt the adapter that PDH that the present invention defines and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge, ADM represents the add-drop multiplexer of SDH transmission equipment, utilize this SDH/SONET passage in the SDH ring, can couple together the PDH interface of two different regions, the PDH interface can be any rate interface in the existing P DH interface standard, in actual use, the adapter that PDH that the present invention proposes and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge has three kinds of operational versions: a kind of is to be used for PDH equipment, make PDH equipment that SDH/SONET interface can directly be connected with SDH/SONET equipment thereby (interconnected) can be provided, situation shown in A point among the figure, this moment PDH equipment with SDH interface that the SDH equipment room is connected in what transmit is the PDH signal of packetizing; A kind of is to be used for SDH/SONET transmission equipment or multiservice transport platform, making directly provides the PDH of various speed interface in these equipment, situation shown in B point among the figure, what the PDH interface of SDH equipment and PDH equipment room adopted at this moment still is common TDM mode, and the packetization process of PDH circuit is finished by the PDH of SDH equipment end and the adapter of SDH fusion; The third is to be directly used in PDH and the interconnected equipment of SDH/SONET, realize the interconnected of PDH network and SDH/SONET network, situation shown in C point among the figure and D point, this moment, the interface (C point) of adapter and SDH equipment room was the SDH interface that has encapsulated the PDH signal of packetizing, and the interface of adapter and PDH equipment room is common PDH interface, PDH in this master drawing and the adapter of SDH/SONET can be to be arranged in the SDH add-drop multiplexer in the network of PDH and SDH/SONET fusion, can be to be arranged in PDH equipment also can exist with independent adapter form.

Claims (13)

1. one kind is used for the adaptation method that PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge; it is characterized in that; by defining the data link layer protocol of data link rules by name; the english abbreviation of data link rules is DLP; thereby the data link layer protocol realization that utilizes described definition on the one hand comprises the fusion and adaptive the interconnected of different physical networks of realizing of the different physical networks of PDH and SDH/SONET; realize Internet Protocol with the data link layer protocol of described definition on the other hand; packet voice business and packet video business are directly adaptive with various physical layer facilities; thereby realization telephone network; the integration of three networks of internet and TV network; in the unified whole communication network of data link layer; make existing communication network be smoothly transitted into unified carrier class public network of future generation; the packetizing by circuit simulation realization PDH circuit signal at first when realizing the fusion of PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) SDH or Synchronous Optical Network SONET with the data link layer protocol of described definition; the PDH circuit simulate signal is handled as the client signal layer of the data link layer protocol of described definition; thereby utilize the data link layer protocol of described definition to realize the direct transmission of PDH (Pseudo-synchronous Digital Hierarchy) on SDH/SONET as client signal layer and the adapting protocol of the SDH/SONET that is positioned at physical layer; data link layer and client signal interlayer communicate by letter and physical layer all realizes by primitive with communicating by letter of data link interlayer; utilize the classification of the data link layer protocol frame definition of described definition; destination address and source address that the destination address sign indicating number of compatible existing telephone number system and source address sign indicating number are represented client signal; utilize the Layer 2 data link layer address to realize the two layers of forwarding and the exchange of client signal; the security mechanism of utilizing described definition of data link layer protocol to provide guarantees that the safety that client signal is grouped in the network transport process transmits; the Frame that defines in the data link layer protocol with described definition sends the miscellaneous service data from the upper strata; the control frame of definition is realized the Topology Discovery that comprises of network; 2 layers of protection are switched; fault management; configuration management and performance management are in interior network control management, and the traffic management frame of definition is realized the traffic engineering management of network.
2. method according to claim 1; it is characterized in that; it is to rely on it to begin specific phase mutual correlation relation that the bit information in the certain-length constitutes most promptly to constitute certain specific coding and concern and realize that the frame of the data link layer protocol frame of described definition is delimited; frame length of definition in the data link layer protocol frame of described definition; English is Frame Length; the field of being abbreviated as FL is used for identifying with the byte form total length of the data link layer protocol frame of described definition; define a frame length verification; English is Frame Length Check; the field of being abbreviated as FLC is used for frame length field is carried out verification and carried out single-bit error or this particular verified encoding relation that 2 bit mistake correction process utilize these two field bit to constitute simultaneously realizes that the frame of the data link layer protocol frame of described definition delimits; define a type of service; English is Service Type; the field of being abbreviated as ST is used for identifying the type of service of payload field encapsulation; thereby realize multiple services encapsulation; the type of service that regulation is different has different priority simultaneously; define a topological field; English is Networks Topology; the field of being abbreviated as NT is come the topological classification of marked network node; define a secure fields; whether English is encrypted the payload of encapsulation for Security identifies; authentication processing; the destination address sign indicating number of a classification of definition; English is Destination Address Code; be abbreviated as DAC and source address sign indicating number; English is Source Address Code; the field of being abbreviated as SAC identifies the two layers of destination address and the source address of encapsulation business data packet; define an extension header; English is ExtensionHeader; whether the field of being abbreviated as EH identifies carries out extension process to payload; defining a filling length field is used for representing to fill the length of filling when handling with the byte form; define a number of frames; English is Frame Sequence Number; the field of being abbreviated as FSN is used for identifying the transmission sequence of the data link layer protocol frame of described definition; define a Security Parameter Index; English is Security ParameterIndex; the field of being abbreviated as SPI identifies carries out the authenticated encryption security association that the communication two ends are set up when handling to data; define a payload; English encapsulate miscellaneous service for the field of Payload from the upper strata; define an optional padding data field and be used for encapsulating the data that to fill when encrypting and authenticating is handled; define an optional authentication data field and encapsulate the verify data that generates when payload carried out authentication processing; define a Frame Check Sequence; English is Frame Check Sequence; being abbreviated as the field of FCS comes the data link layer protocol frame of described definition is carried out verification; definition one class Frame sends the miscellaneous service data from the upper strata in the data link layer protocol frame of described definition; define a class traffic management frame and realize the traffic engineering management of network; define a class control frame and realize the Topology Discovery that comprises of network; 2 layers of protection are switched; fault management; configuration management and performance management are in interior network control management; these three kinds of dissimilar frames are identified by the business type field in the data link layer protocol frame of described definition; specific as follows: definition frame length FL field length is 16 bits; definition frame length check field FLC length is 15 bits; make FL and FLC field bit constitute BCH (31; 16) sign indicating number; BCH is the english abbreviation of BCH Bose-Chadhuri-Hocquengham's sign indicating number; this relation of utilizing the DLP frame realizes the frame demarcation of DLP frame and single-bit or 2 bit mistakes that FL occurs is carried out correction process; the generator polynomial of BCH (31,16) sign indicating number is G (x)=x 15+ x 11+ x 10+ x 9+ x 8+ x 7+ x 5+ x 3+ x 2+ x+1, initialization value are 0, here x 15Corresponding highest significant position, english abbreviation is MSB, x 0Corresponding least significant bit, english abbreviation is LSB, it is that the specific coding of FL field and FLC field concerns that the frame of realizing the DLP frame delimits that the DLP frame utilizes front 31 bits in the DLP frame, the DLP frame is delimited process and is realized according to finite state machine, finite state machine comprises three states: the search attitude, English is HUNT, the presynchronization attitude, english abbreviation is PRESYNC, synchronous state, english abbreviation is SYNC, the finite state machine workflow is as follows: (1) is in the search attitude, DLP handles 31 bits that receive is pursued FL and the FLC relation that correct format is sought in the bit search, in this state, BCH code does not have the single-bit error of FL field and FLC field or 2 bit mistake error corrections, in case in 31 bits that receive, find correct candidate FL and FLC matching relationship value, can suppose and determine a correct DLP frame, receive to handle and enter the presynchronization presync state, (2) in the PRESYNC attitude, DLP handles by searching for frame by frame to handle and realizes the demarcation of DLP frame, pursue FL and the correct matching value of FLC that the bit search is found according to previous step, can suppose and search a correct DLP frame, determine the FL and the FLC field value of next frame then according to each field relation of this frame, and determine according to their relation whether they mate, and then next frame, in case determine DELTA correct DLP frame continuously, DELTA is a parameter, it be one greater than 0 positive integer, DLP receives to handle and enters synchronous state, otherwise, if the FL of a frame and FLC field value do not match subsequently, enter the search attitude, at this moment, BCH code does not have the single-bit error of FL field and FLC field or 2 bit mistake error corrections, enter synchronous state from the search attitude and need search DELTA+1 correct DLP frame continuously, (3) at synchronous state, DLP handles the beginning of determining next DLP frame by the FL of a frame and FLC field relation, realize the parsing of a frame one frame then, FLC has single-bit error or 2 bit mistake error corrections in this state, if the mistake that a plurality of bits promptly surpass 2 bit mistakes takes place, then frame is delimited and was lost efficacy, framing is handled and is entered the search attitude, and send the indication of client server Signal Fail for client's adaptation processing, english abbreviation is SSF, (4) the empty frame of DLP participates in frame and delimits processing, and abandon the sky frame subsequently, it is relevant with the DELTA value that the DLP frame is delimited the robustness of handling, the DELTA value is 1, the reserved field that length of definition is 1 bit behind FLC gives over to the R field that uses in the future, R field is set to 0 always, definition business type field length is 8 bits, can discern 2 altogether 8=256 kinds of types of service; Wherein highest significant position is that what represented in 0 o'clock to encapsulate is that the general data business of low priority is common IP data service; Highest significant position is that the business that represented the encapsulation of DLP payload field at 1 o'clock is that the real time business of high priority is phone, real-time video traffic; The priority of DLP Business Processing order from high to low is followed successively by: control frame＞traffic management frame＞real time business＞IP v4/IP v6 data service; The business of high priority is at first processed in the formation of DLP network processes; The usage of business type field is as shown in table 1
The usage of table 1. business type field
The binary value of business type field Usage 00000000～00000011 Keep 00000100 The IPv4 data 00000101 The mobile IPv 4 data 00000110 The IPv6 data 00000111 Moving IPv 6 data
00001000～00111111 Keep and give other data, services 01000000 The 10Mbps Ethernet 01000001 The 100Mbps Ethernet 01000010 The 10/100Mbps Ethernet 01000011 Gigabit Ethernet 01000100～01111111 Keep 10000001 Control frame 10000010 The traffic management frame 10000011 Fixedly local telephony service in real time, local telephone 10000100 Real-time fixedly National calls business 10000101 Real-time fixedly international long-distance telephone business 10000110 In real time fixing local visual telephone service, the city video telephone 10000111 Real-time fixedly national distance visual telephone service 10001000 Real-time fixedly international long-distance visual telephone service 10001001 Landline telephone is called out local mobile service in real time 10001010 Landline telephone is called out mobile National calls business in real time 10001011 Landline telephone is called out international mobile long-distance telecommunications service in real time 10001100 Landline telephone is called out local mobile video telephone business in real time 10001101 Landline telephone is called out mobile national distance visual telephone service in real time 10001110 Landline telephone is called out the international long-distance visual telephone service that moves in real time 10001111 Move domestic voice service in real time 10010000 Move international voice service in real time
10010001 Move domestic visual voice service in real time 10010010 Move international visual voice service in real time 10010011 Real-time video traffic, the broadcast type television services 10010100 Real-time video traffic, the unicast type television services 10010101 Real time business based on IPv4 10010110 Real time business based on IPv6 10010111 Real time business based on mobile IPv 4 10011000 Real time business based on mobile IP v 6 10011001 G.702PDH circuit emulation service: asynchronous circuit 1544 kilobits/second 10011010 G.702PDH circuit emulation service: asynchronous circuit 2048 kilobits/second 10011011 G.702PDH circuit emulation service: asynchronous circuit 6312 kilobits/second 10011100 G.702PDH circuit emulation service: asynchronous circuit 8448 kilobits/second 10011101 G.702PDH circuit emulation service: asynchronous circuit 34368 kilobits/second 10011110 G.702PDH circuit emulation service: asynchronous circuit 44736 kilobits/second 10011111 G.702PDH circuit emulation service: synchronous circuit 1544 kilobits/second 10100000 G.702PDH circuit emulation service: synchronous circuit 2048 kilobits/second 10100001 G.702PDH circuit emulation service: synchronous circuit 6312 kilobits/second 10100010 G.702PDH circuit emulation service: synchronous circuit 8448 kilobits/second 10100011 G.702PDH circuit emulation service: synchronous circuit 34368 kilobits/second 10100100 G.702PDH circuit emulation service: synchronous circuit 44736 kilobits/second 10100101 G.702PDH circuit emulation service: 139264 kilobits/second 10100111 G.707SDH circuit emulation service: C-11,1648 kilobits/second 10101000 G.707SDH circuit emulation service: C-12,2224 kilobits/second 10101001 G.707SDH circuit emulation service: C-2,6832 kilobits/second 10101010 G.707SDH circuit emulation service: C-3,48384 kilobits per seconds 10101011 G.707SDH circuit emulation service: C-4,149760 kilobits per seconds 10101100 G.707SDH circuit emulation service: VC-11,1664 kilobits per seconds 10101101 G.707SDH circuit emulation service: VC-12,2240 kilobits/second 10101110 G.707SDH circuit emulation service: VC-2,6848 kilobits/second
10101111 G.707SDH circuit emulation service: VC-3,48960 kilobits/second 10110000 G.707SDH circuit emulation service: VC-4,150336 kilobits/second 10110001 G.707SDH circuit emulation service: TU-11,1728 kilobits per seconds 10110010 G.707SDH circuit emulation service: TU-12,2304 kilobits per seconds 10110011 G.707SDH circuit emulation service: TU-2,6912 kilobits per seconds 10110100 G.707SDH circuit emulation service: TU-3,49152 kilobits per seconds 10110101 G.707SDH circuit emulation service: AU-3,50304 kilobits per seconds 10110110 G.707SDH circuit emulation service: AU-4,150912 kilobits per seconds 10110111 G.707SDH circuit emulation service: STM-0,51480 kilobits/second 10111001 G.707SDH circuit emulation service: STM-1/OC-3c, 155520 kilobits/second 10111010 G.707SDH circuit emulation service: STM-4OC-12c, 600080 kilobits/second 10111011 G.707SDH circuit emulation service: STM-16 ,/OC-48c 2488320 kilobits/second 10111100 DVB, MPEG-1 transmits bit stream 10111101 DVB, MPEG-2 transmits bit stream 10111110 DVB, MPEG-4 transmits bit stream 10111111～11111111 Keep and give other real time business
Defining topological field length is 4 bits; wherein binary value " 0001 " is represented bus structures; binary value " 0010 " expression star structure; binary value " 0011 " expression tree topology; binary value " 0100 " expression ring topology; binary value " 0101 " expression mesh topology; other values keep to give in the future to be used; for ring topology and network topology; DLP provides 50 milliseconds of protection switch functions; definition secure fields length is 4 bits; wherein binary value " 0000 " expression is not carried out any encryption to upper-layer service; authentication processing; binary value is represented carry out encryption from the business datum on upper strata for " 0001 "; binary value " 0010 " expression is carried out authentication processing to the business datum from the upper strata; binary value " 0100 " expression is to encrypting and authentication processing from the business datum on upper strata; other values keep in the future to be used; definition destination address code length is 64 bits; definition source address code field length is 64 bits; the destination address sign indicating number adopts identical hierarchy with the source address sign indicating number; all by national code; English is Country Code; be abbreviated as CC; domestic area code; English is National Region Code; be abbreviated as NRC; station code; English is Node Area Code; be abbreviated as NAC and personal code work; English is User Code; being abbreviated as UC4 field forms; each field length is 16 bits; wherein national code is represented the first order forwarding label of upper-layer service; domestic area code is represented the second level forwarding label of upper-layer service; station code is represented the third level forwarding label of upper-layer service; personal code work is represented the fourth stage forwarding label of upper-layer service, and definition header field length is 8 bits, and wherein binary value does not have extension header for " 00000000 " expression; other values keep in the future to be used; it is 8 bits that length field length is filled in definition, is used for filling the length that the DLP payload field is filled when handling with byte form sign, and definition frame sequence-number field length is 16 bits; be used for the data link layer protocol frame of the described definition that sends is carried out sequence mark; this field value carries out sequence mark since the 0 data link layer protocol frame to the described definition that sends, up to maximum, if FSN reaches maximum; send processor and remove the value of register; and count again since 0, can transmit transmission according to correct order with the data link layer protocol frame that guarantees described definition; receive and handle, FSN also provides anti-playback simultaneously; definition Security Parameter Index field length is 16 bits; this field is optionally, and its value is arbitrarily, is used in combination the security association that identifies uniquely under this DLP frame with DLP destination address sign indicating number; English is Security Association; be abbreviated as SA, wherein the SPI value is that 0 reservation is given local; specific implementation is used, and metric 1～255 is kept to using in the future by IANA; IANA is the english abbreviation of Internet Assigned Numbers Authority; other values are determined according to the encrypting and authenticating algorithm that adopts that by communicating pair definition payload field length is 0～65535 byte, are used for encapsulating the whole client signal grouping from client layer; defining optional padding data field length is 0～255 byte; occurrence is relevant with the encrypting and authenticating algorithm of employing, and its value is determined by the encrypting and authenticating algorithm, defines the verify data that generates when an authentication data field is deposited authentication processing; the authentication data field value is relevant with the identifying algorithm of employing; its value determine to be generated by concrete identifying algorithm, and definition frame verification sequence FCS field length is 32 bits, and being used for to data link layer protocol frame is that the payload of part header fields content and encapsulation carries out verification in the DLP frame; FCS verification scope comprises: first bit of business type field begins from the DLP frame; until the ending of DLP frame specifically comprises business type field; the topology field; secure fields; the destination address sign indicating number; the source address sign indicating number; extension header; fill length field; number of frames; Security Parameter Index; payload; padding data; the authentication data field bit stream carries out checking treatment, and checking algorithm adopts the CRC-32 of 802.32002 editions definition of IEEE: generator polynomial is G (x) x 32+ x 26+ x 26+ x 23+ x 22+ x 16+ x 12+ x 11+ x 10+ x 8+ x 7+ x 5+ x 4+ x 2+ x 1+ 1, here, x 32Corresponding MSB position, and x 0Corresponding LSB position is if DLP frame generation fcs error abandons the DLP frame that makes a mistake, if some field value can not be discerned, fcs error perhaps occurs, then think invalid data link layer protocol frame, invalid frame will be dropped, do not notify transmit leg, also do not produce any action, invalid frame comprises:
(1) the DLP frame of received frame generation fcs error, FCS does not match
(2) received frame length is less than the frame of 30 bytes
(3) frame that can not discern of business type field
(4) frame that can not discern of other fields of header
If client layer does not have signal demand to send, need fill processing at the DLP frame gap, promptly send empty frame, the purpose that sends empty frame is in order to regulate two internodal speed, empty frame sends to its adjacent nearest node from a node, neighbor node is not forwarded to any other place to it after receiving the sky frame, directly it is abandoned, do not notify transmit leg yet, the content of the empty frame of filling that sends at frame gap comprises frame length field, the frame length check field, be set to 0 length always and be the reserved field of 1 bit and include only station code in the source address sign indicating number and source address sign indicating number that the personal code work field amounts to 4 bytes, at transmitting terminal, the synchronous payload encapsulation SPE that the DLP frame that has encapsulated client signal is encapsulated among the SDH/SONET must carry out scrambler before, be at first to carry out descrambling code before any processing of DLP frame at receiving terminal to data link layer protocol frame, could be for further processing to the DLP frame behind the descrambling code, scrambler and descrambling code adopt motor synchronizing scrambler/descrambler, and its generator polynomial is G (X)=X 43+ 1.
3. method according to claim 1, it is characterized in that, realize the fusion of PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network with the data link layer protocol of data link rules by name, thereby realize the transmission of PDH (Pseudo-synchronous Digital Hierarchy) on SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network, PDH (Pseudo-synchronous Digital Hierarchy) is handled as the client layer of DLP, at first realize the packetizing of PDH (Pseudo-synchronous Digital Hierarchy) signal by circuit simulation, the packetizing PDH signal of the output certain-length of gap periods at regular intervals, the output cycle and the block length of PDH signal are relevant with the PDH interface rate, table 2 is a kind of possible classification, require total speed of SDH interface greater than the PDH interface rate this moment
The length of table 2.PDH signal packets
The client signal type The block length of PDH signal, unit is a byte G.702PDH 1544 kilobits/second ?579 G.702PDH 2048 kilobits/second ?512 G.702PDH 6312 kilobits/second ?789 G.702PDH 8448 kilobits/second ?132 G.702PDH 34368 kilobits/second ?537 G.702PDH 44736 kilobits/second ?595 G.702PDH 139264 kilobits/second ?544
Then the PDH circuit simulate signal of packetizing is encapsulated into as client layer signal in the payload field of data link layer protocol frame of described definition; simultaneously the business type field value is set according to the PDH interface rate; source address sign indicating number and destination address sign indicating number according to the data link layer protocol frame of the described definition of address setting of port; the data link layer protocol frame topology field value of described definition is set according to the node topology type; according to whether the PDH circuit simulate signal being carried out encrypting and authenticating handles the security word segment value is set; data link layer protocol frame to each described definition of sending carries out sequence mark simultaneously; then the data link layer protocol frame of described definition is encapsulated in the SDH/SONET payload field; at first the data link layer protocol frame to described definition carries out the scrambler processing before the data link layer protocol frame of described definition is mapped to the SDH/SONET payload field; the destination address of the data link layer protocol frame of the described definition of foundation can be realized the forwarding and the exchange of PDH signal in network; handle the PDH circuit simulate signal that extracts packetizing at receiving terminal according to the reverse order of transmitting terminal; be reassembled as complete PDH signal according to number of frames; this moment, physical layer was the SDH/SONET physical interface of existing whole speed ranges; data link layer is the data link layer protocol DLP of described definition; the DLP data link layer is that formula information transfer service pattern is not confirmed in the service employing that PDH circuit simulate signal layer provides for client layer; the data that send are not done any affirmation formula operation; the data link layer protocol layer of described definition passes through " data link-data-request; English is DL_DATA.request " for the service that client layer provides; " data link-data-indication; English is DL_DATA.indication "; " data link-control-request; English is DL_CONTROL.request "; " data link-control-indication; English is DL_CONTROL.indication " 4 primitive are realized; physical layer is passed through two primitive for the service that the DLP data link layer provides: " physical link-data-request; English is PL_DATA.request "; " physical link-data-indication; English is PL_DATA.indication " realize; at transmitting terminal; when the PDH circuit simulate signal need send; call data link-data-request DL_DATA.request primitive; this primitive comprises series of parameters; these parameters are used for determining each field of data link layer protocol frame header of described definition and the value of payload field; at receiving terminal; when the data link layer protocol client entity of described definition will receive data; the data link layer protocol entity of described definition activates DL_DATA.indication primitive; the accepting state of this primitive indication incoming frame and the value of each field of incoming frame; if client layer needs the data link layer protocol of described definition that network control function is provided; call data link-control primitive: " data link-control-request; English is DL_CONTROL.request " and " data link-control-indication; English is DL_CONTROL.indication " primitive; these two primitive comprise a series of command code and parameter; can provide by these two primitive and to comprise discovering network topology; 2 layers of protection are switched; configuration management; fault management; performance management is at interior network control function; at transmitting terminal; need be when data link layer sends to physical entity as data; the data link layer protocol entity of described definition activates PL_DATA.request primitive; will be when physical entity sends the data link layer protocol entity of described definition at receiving terminal as data; activate PL_DATA.indication primitive, each primitive semantic as follows:
(1) data link-data-request DL_DATA.request
DL_DATA.request primitive contains 9 parameters, the implication of each parameter is respectively: DestinationAddressCode represents the destination address sign indicating number, with the destination address code word segment value in the data link layer protocol frame header that generates described definition, SourceAddressCode represents the source address sign indicating number, with the source address code word segment value in the data link layer protocol frame header that generates described definition, the client signal that DLPServiceData indicates to send is whole PDH circuit simulate signal grouping, with payload word segment value in the data link layer protocol frame that generates described definition, the definite total length of wanting the data link layer protocol frame of described definition of FrameLength parameter, the type of service that the ServiceType parameter indicates the data link layer protocol client layer of described definition to send, it uses business type field value in the data link layer protocol frame header that generates described definition, the Security parameter indicates whether the data link layer protocol client signal of described definition is encrypted, authentication processing, the data link layer protocol entity of described definition is determined security word segment value in the data link layer protocol frame header of described definition with it, the number of frames FSN of transmit frame is wanted in the indication of FrameSequenceNumber parameter, the data link layer protocol entity of described definition is determined FSN field value in the data link layer protocol frame header of described definition with it, the data link layer protocol entity of the described definition of network topology of NetworkTopology parameter indication network node is determined topological field value in the data link layer protocol frame header of described definition with it, the SPI parameter is an option, SPI is the english abbreviation of Security Parameter Index, determine client signal is encrypted if be used for, the security association of setting up at the communication two ends during authentication processing, be used for determining the Security Parameter Index SPI field value in the data link layer protocol frame of described definition
(2) data link-data-indication DL_DATA.indicationDL_DATDA.indication primitive parameter is semantic as follows: DestinationAddressCode represents the destination address sign indicating number, destination address code word segment value in the data link layer protocol frame header of the described definition of the definite input of this parameter, SourceAddressCode represents the source address sign indicating number, source address code word segment value in the data link layer protocol frame header of the described definition of the definite input of this parameter, DLPServiceData determines the data link layer protocol frame payload word segment value of the described definition of input, the accepting state of ReceptionStatus indication incoming frame, if the Frame Check Sequence FCS field of incoming frame does not make a mistake, the value of ReceptionStatus is FCS_ERROR_FREE, otherwise, if incoming frame makes a mistake, then the ReceptionStatus value is FCS_ERROR, the business type field value of the data link layer protocol frame of the described definition of ServiceType parameter indication input, the FrameLength parameter is determined the total length of the data link layer protocol frame of the described definition of input, whether the data link layer protocol frame of the described definition of Security parameter indication input is encrypted, authentication processing, the Security field value of the data link layer protocol frame of the described definition of its indication input, the FrameSequenceNumber parameter is indicated the number of frames FSN of described incoming frame, topological field value in the data link layer protocol frame of the described definition of NetworkTopology parameter indication input, the SPI parameter is used to refer to the Security Parameter Index field value of described incoming frame
(3) data link-control-request DL_CONTROL.request primitive data link-control-request DL_CONTROL.request primitive comprises two parameters: first parameter is a command code; second parameter is solicit operation ordered series of numbers table; wherein command code comprises the Topology Discovery request; English is TOPOLOGY_DISCOVERY_REQ; 2 layers of protection switching request; English is L2PS_REQ; configuring request; English is CONFIGURATION_REQ; the fault inquiry request; English is FAULT_INQUIRY_REQ; the performance queries request; English is PERFORMANCE_INQUIRY_REQ; the concrete operations ordered series of numbers table of each command code is as follows: the solicit operation number of Topology Discovery request TOPOLOGY_DISCOVERY_REQ command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; Topology Discovery claim frame payload data; the solicit operation number of 2 layers of protection switching request L2PS_REQ command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; 2 layers of protection switching request frame payload data; the solicit operation number of configuring request CONFIGURATION_REQ command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; configuring request frame payload data; the solicit operation number of fault inquiry request FAULT_INQUIRY_REQ command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; fault inquiry claim frame payload data; the solicit operation number of performance queries request PERFORMANCE_INQUIRY_REQ command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; performance queries claim frame payload data; destination address sign indicating number in each operand; the source address sign indicating number; type of service; the implication of number of frames parameter is the same with data link-data-request primitive corresponding parameters implication
(4) data link-control-indication DL_CONTROL.indication primitive data link-control-indication DL_CONTROL.indication primitive comprises two parameters; first parameter is a command code; second parameter is the tabulation of indication operand; wherein command code comprises Topology Discovery response indication; English is TOPOLOGY_DISCOVERY_RESPONSE_IND; the response indication is switched in 2 layers of protection; English is L2PS_RESPONSE_IND; the configuration response indication; English is CONFIGURATION_RESPONSE_IND; fault inquiry response indication; English is FAULT_INQUIRY_RESPONSE_IND; performance queries response indication; English is PERFORMANCE_INQUIRY_RESPONSE_IND; the concrete operations ordered series of numbers table of each command code is as follows: the indication operand of Topology Discovery response indication TOPOLOGY_DISCOVERY_RESPONSE_IND command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; Topology Discovery response frame payload data; 2 layers of protection are switched response and are indicated the indication operand of L2PS_RESPONSE_IND command code to comprise the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; the response frame payload data is switched in 2 layers of protection; the indication operand of configuration response indication CONFIGURATION_RESPONSE_IND command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; configuration response frame payload data; the indication operand of fault inquiry response indication FAULT_INQUIRY_RESPONSE_IND command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; fault inquiry response frame payload data; the indication operand of performance queries response indication PERFORMANCE_INQUIRY_RESPONSE_IND command code comprises the destination address sign indicating number; the source address sign indicating number; type of service; number of frames; performance queries response frame payload data; destination address sign indicating number in each operand; the source address sign indicating number; type of service; the implication of number of frames parameter is the same with data link-data-indication corresponding parameters implication
(5) physical link-request of data PL_DATA.request primitive PL_DATA.request primitive has only a parameter, and this parameter is a user data, and English is Userdata,
(6) physical link-data indication PL_DATA.indication primitive PL_DATA.indication primitive has only a parameter, and this parameter is a user data, and English is Userdata.
4. method according to claim 1, it is characterized in that, it is adaptive to realize that with the data link layer protocol of described definition PDH (Pseudo-synchronous Digital Hierarchy) and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network merge, physical layer is the SDH/SONET physical interface of existing whole speed ranges, support is from the Lower Order Virtual Container to the higher order virtual container, comprise that level is associated in interior whole speed ranges, can realize based on all kinds of virtual containers, the direct exchange of the circuit of the particle of all kinds of Synchronous Transfer Modes and the direct exchange of optical-fiber network light wave, wherein all kinds of virtual containers and bandwidth thereof, the payload parameter is as shown in table 3:
All kinds of virtual containers of table 3.SDH and bandwidth thereof, payload parameter
The virtual container type The virtual container bandwidth The virtual container payload Virtual container-11 Its bandwidth is 1664 kilobits/second Payload 1600 kilobits/second Virtual container-12 Its bandwidth is 2240 kilobits/second Payload 2176 kilobits/second Virtual container-2 Its bandwidth is 6848 kilobits/second Payload 6784 kilobits/second Virtual container-3 Its bandwidth is 48960 kilobits/second Payload 48384 kilobits/second Virtual container-4 Its bandwidth is 150336 kilobits/second Payload 149760 kilobits/second Virtual container-4-4c Its bandwidth is 601344 kilobits/second Payload 599040 kilobits/second Virtual container-4-16c Its bandwidth is 2405376 kilobits/second Payload 2396160 kilobits/second Virtual container-4-64c Its bandwidth is 9621504 kilobits/second Payload 9584640 kilobits/second Virtual container-4-256c Its bandwidth is 38486016 kilobits/second Payload 38338560 kilobits/second
The interface rate of all kinds of Synchronous Transfer Modes is as shown in table 4:
The interface rate of all kinds of Synchronous Transfer Modes of table 4.SDH
The Synchronous Transfer Mode type Bit rate sSTM-11 2880 kilobits/second sSTM-12 5184 kilobits/second sSTM-14 9792 kilobits/second sSTM-18 19792 kilobits/second sSTM-116 37444 kilobits/second sSTM-21 7488 kilobits/second sSTM-22 14400 kilobits/second sSTM-24 28224 kilobits/second STM-0 51840 kilobits/second STM-1 155052 kilobits/second STM-4 622080 kilobits/second STM-16 2488320 kilobits/second STM-64 9953280 kilobits/second STM-256 39813120 kilobits/second
When physical layer adopted Synchronous Optical Network SONET, all kinds of virtual containers and bandwidth thereof, payload parameter were as shown in table 5:
All kinds of virtual containers of table 5.SONET and bandwidth thereof, payload parameter
The virtual container type The virtual container bandwidth The virtual container payload Virtual container-11 Its bandwidth is 1664 kilobits/second Payload 1600 kilobits/second Virtual container-12 Its bandwidth is 2240 kilobits/second Payload 2176 kilobits/second Virtual container-2 Its bandwidth is 6848 kilobits/second Payload 6784 kilobits/second Virtual container-3 Its bandwidth is 48960 kilobits/second Payload 48384 kilobits/second Virtual container-4 Its bandwidth is 150336 kilobits/second Payload 149760 kilobits/second Virtual container-4-4c Its bandwidth is 601344 kilobits/second Payload 599040 kilobits/second Virtual container-4-16c Its bandwidth is 2405376 kilobits/second Payload 2396160 kilobits/second Virtual container-4-64c Its bandwidth is 9621504 kilobits/second Payload 9584640 kilobits/second Virtual container-4-256c Its bandwidth is 38486016 kilobits/second Payload 38338560 kilobits/second
The interface rate of all kinds of Synchronous Transfer Modes of Synchronous Optical Network is as shown in table 6.
The interface rate of all kinds of Synchronous Transfer Modes of table 6. Synchronous Optical Network
The Synchronous Transfer Mode type Bit rate STS-1 51840 kilobits/second STS-3 155520 kilobits/second STS-9 466560 kilobits/second STS-12 622080 kilobits/second STS-18 933120 kilobits/second STS-24 1422160 kilobits/second STS-36 1866240 kilobits/second STS-48 2488320 kilobits/second STS-192 9953280 kilobits/second STS-768 39813120 kilobits/second
5. method according to claim 1, it is characterized in that, comprise a destination address sign indicating number DAC and source address sign indicating number SAC in the data link layer protocol frame header of described definition, for IP operation, destination address sign indicating number and source address sign indicating number are represented the purpose IP address in the IP packet head and the forwarding equivalence class of source IP address respectively, the telephone number of representing both call sides for packet voice business purpose address code and source address sign indicating number respectively, network for the fusion of PDH and SDH/SONET, destination address sign indicating number and source address sign indicating number represent that respectively client signal is the address of the transmitting terminal and the receiving terminal of PDH circuit simulate signal, realize that with two layers data-link layer address client signal is two layers of forwarding of PDH circuit simulate signal and exchanges, the destination address sign indicating number adopts identical hierarchy with the source address sign indicating number, all by national code, English is Country Code, be abbreviated as CC, domestic area code, English is National Region Code, NRC, station code, English is NodeArea Code, be abbreviated as NAC and personal code work, English is User Code, being abbreviated as four parts of UC forms, definition destination address sign indicating number and source address code field length are i.e. 8 eight hytes of 64 bits, wherein the national code field length is i.e. 2 eight hytes of 16 bits, be used for identifying certain service code of some countries or specific geographical area, CC is the first order forwarding label of upper-layer service, can there be one or more service code country or geographic area, the voice service code, the video traffic code, the IPv4 service code, the IPv6 service code, the concrete national code value of related service is specified by relevant international standard mechanism, domestic area code field length is 16 bits, certain regional service code in the expression a state, NRC is the second level forwarding label of upper-layer service, concrete NRC value is distributed by the communication highest administration mechanism of this state, the station code field is 16 bits, identify the service code of certain network node, this code is the third level forwarding label of upper-layer service, occurrence is specified by Virtual network operator or Internet service provider, the personal code work field length is 16 bits, the service code of representing certain user, this yard is the fourth stage forwarding label of upper-layer service, concrete UC value is specified by Virtual network operator or Internet service provider, when the data link layer protocol that adopts described definition is realized the fusion of PDH and SDH (Synchronous Digital Hierarchy) or Synchronous Optical Network, the PDH circuit simulate signal is encapsulated in the data link layer protocol frame of described definition, according to the needs of the network integration destination address sign indicating number and source address sign indicating number are set, the PDH circuit simulate signal is at the destination address sign indicating number and the source address sign indicating number of the data link layer protocol frame of the described definition of the complete foundation of processing of physics transmission network subsequently, in order to reduce header overhead, the type of service that is provided with by the business type field in the data link layer protocol frame header of described definition realizes that with the data link layer protocol of described definition the destination address sign indicating number and the source address sign indicating number of the data link layer protocol frame that defines described in the network of PDH and SDH/SONET fusion can include only domestic area code, three fields of station code and personal code work or include only station code and two fields of personal code work, the transmission of PDH circuit simulate signal in network subsequently handled and divided into groups to handle by DLP, during the data link layer protocol frame of the described definition of forwarded, at first search the business type field in the data link layer protocol frame of described definition, determine professional priority by concrete type of service, be the national code in the destination address sign indicating number of searching in the data link layer protocol frame of described definition then, next is domestic area code, be station code once more, be personal code work at last, in case find a certain item code and local node different of the data link layer protocol frame of described definition, network node is no longer handled destination address sign indicating number back field in the data link layer protocol frame of described definition, directly is forwarded to next node, the principle that the data link layer protocol frame of described definition is transmitted is to adopt longest match principle, described can be to utilize IP routing protocol to comprise OSPF according to destination address sign indicating number decision route, and English is Open Shortest Path First, is abbreviated as OSPF, Border Gateway Protocol, English is Border Gateway Protocol, is abbreviated as the dynamic routing table that BGP produces, and the traffic engineering of utilizing the data link layer protocol of described definition to provide is come explicit configuration route.
6. method according to claim 1, it is characterized in that, the data link layer protocol of described definition comprises that a cover security mechanism guarantees the safety of upper-layer service in the network transport process, concrete grammar is to realize that by upper-layer service being encrypted with authentication processing the safety of upper layer signal transmits, the safety function that data link layer protocol by described definition provides realizes the encryption to the PDH circuit simulate signal, the safe handling function of authentication, if desired the PDH signal being carried out encrypting and authenticating handles, at first a series of negotiation of two ends process by communicating by letter at needs, determine the cryptographic algorithm of employing, identifying algorithm, be provided with or exchange initialization password, consult internet security association and IKMP that encrypting and authenticating algorithm and exchange initialization Password Operations can adopt the RFC2408 definition, english abbreviation is the internet key exchange of ISAKMP and RFC2409 definition, english abbreviation is that IKE realizes, set up two security associations at the two ends of communication then, English is Security Association, be abbreviated as SA, and according to purpose IP address, the algorithm that adopts is determined a Security Parameter Index, english abbreviation is SPI, the value of this Security Parameter Index is added in the Security Parameter Index field in the data link layer protocol frame header of described definition, SPI is used for identifying the IP bag is encrypted, security association during authentication processing, the encrypting and authenticating algorithm that Security Parameter Index identifies security association uniquely and adopted with the destination address sign indicating number, simultaneously comprising the destination address sign indicating number, the cryptographic algorithm that adopts, identifying algorithm, the initialization password, Security Parameter Index adds in the security association database in interior relevant parameter, security association database has write down and security-related various data, definition SPI field length is 32 bits, wherein decimal value " 0 " is used for node this locality, specific implementation is used, decimal value 1～255 is kept to using in the future by IANA, other values are used to identify security association, owing to encrypt, the different needs of identifying algorithm carries out some data and fills processing, the data of filling are positioned at after the payload field, and a length value of filling adds in the filling length field value, the verify data that authentication processing generates is positioned at after the padding data field, before the frame check field, utilize the number of frames value in the DLP frame header that anti-reproducing function is provided, when carrying out encryption, the scope of encrypting comprises the whole client signal grouping from client layer, padding data, the scope that authenticates when carrying out authentication processing comprises the filling length field, the number of frames field, the Security Parameter Index field, payload data, padding data.
7. method according to claim 1; it is characterized in that; the data link layer protocol of described definition comprises that the perfect network control administrative mechanism of a cover realizes the Topology Discovery that comprises of network; 2 layers of protection are switched; the Link State indication; fault management; performance management; configuration management is in interior control and management; described network control management realizes by control frame; when the binary value of the business type field of the data link layer protocol frame of described definition represents that the content that the encapsulation of data link layer protocol frame DLP frame payload field is carried is a network control management information during for " 10000001 "; corresponding data link layer protocol frame is a control frame; the data link layer protocol control frame of described definition realizes comprising Topology Discovery; the Link State indication; fault management; performance management; configuration management is in interior network control and management function; for annular and network topology; the data link layer protocol control frame of described definition also provides a kind of mechanism that realizes 50 milliseconds of protection switch functions; control frame adopts the TLV structure; TLV is the english abbreviation of Type-Length-Value; the Chinese meaning is type-length-value; type field length is 8 bits; be used for identifying the type of control frame; length field length is 8 bits; be used for representing that with the byte form TLV structure intermediate value is the length of Value field; value is the particular content that related parameter is arranged that the Value field comprises control frame; in the control frame in the TLV structure usage of type field as shown in table 7; wherein; what represent when type field value is binary " 00010001 " that control frame carries is OSPF Routing Protocol information; OSPF is the english abbreviation of OSPF; control frame carries the type field binary value is BGP Routing Protocol information for " 00010010 " expression; BGP is the english abbreviation of Border Gateway Protocol; control frame carries the type field binary value is Signaling System 7(SS-7) SS7 information for " 00010011 " expression; what the type field binary value carried for " 00010100 " expression control frame is signaling information H.323; control frame carries the type field binary value is the Session initiation protocol SIP signaling information for " 00010101 " expression; control frame carries the type field binary value is Media Gateway Control Protocol for " 00010110 " expression; english abbreviation is the signaling information of MGCP; when being binary " 11111111 ", type field represents that control frame is the self-defining management control frame of manufacturer; the self-defining management function of manufacturer comprises that equipment manufacturers are the self-defining network management control function of network management control function and operator that home built relevant devices is added; its management data content is self-defined by manufacturer; but need to adopt the TLV structure; the number of frames value of the data link layer protocol control frame of described definition is used for identifying the sequencing that control frame sends; the data link layer protocol control information that realizes the described definition of sign sends the function of sequence successively, and the payload information field of the data link layer protocol control frame of described definition comprises one or more control TLV information.
The usage of the binary value of type field value in table 7. control frame
The binary value of type field Usage 00000000 Keep 00000001 The Topology Discovery claim frame 00000010 The Topology Discovery response frame 00000011 Topology report frame 00000100 2 layers of protection switching request frame 00000101 Response frame is switched in 2 layers of protection 00000110 2 layers of protection switch status report frame 00000111 The configuring request frame 00001000 The configuration response frame
00001001 The configuration report frame 00001010 The fault inquiry claim frame 00001011 The fault inquiry response frame 00001100 The Trouble Report frame 00001101 The performance queries claim frame 00001110 The performance queries response frame 00001111 The performance report frame 00010000 WTR_Request Wait-to-Restore claim frame 00010001 Route association--OSPF 00010010 Route association--BGP 00010011 Signaling--Signaling System 7(SS-7), english abbreviation are SS7 00010100 Signaling--H.323 00010101 Signaling--conversation initialized protocol, english abbreviation are SIP 00010110 Signaling--Media Gateway Control Protocol, english abbreviation are MGCP 00010111～11111110 Keep 11111111 Manufacturer's self-defining dedicated network control and management frame
8. method according to claim 7; it is characterized in that; the network control administrative mechanism that the data link layer protocol of described definition provides comprises Topology Discovery mechanism; which Topology Discovery is used for finding out is that network node is the neighbor node of DLP node and the state of neighbor node; find have what nodes to work on the ring for annular and network topology network node with Topology Discovery; the realization of topology discovery function relies on the Topology Discovery claim frame; English is Topology_Discovery_Request frame; the Topology Discovery response frame; English is Topology_Discovery_Response frame; topology report frame; English is realized for Topology_State_Report frame; during installation of project stage or engineering operation; network node be DLP node A with the L2 address sign indicating number of this node as destination address periodically broadcast topology find that claim frame is to other node; claim that one of them is a Node B; the transmission cycle is determined by Topology Discovery timer Timer_Topology_Discovery; it is programmable that the Topology Discovery timer sends timing; default to 2 seconds; receive all nodes of Topology Discovery claim frame; Node B; respond for node A by the Topology Discovery response frame; give node A the existence of Node B and state feedback thereof; node A adds other address of node sign indicating number and the corresponding work state content that receive in the topological address database of node A to; for annular and network topology; the station code that has artis to go up in each address of node sign indicating number according to ring is that NAC field value content is determined to encircle upward or the node sequence in the grid; node A receives the identical operations content from Node B continuous 3 times; then think the Topology Discovery frame efficient in operation of node; relevant topological state content is write the topological database of ingress; network node is reported the state of frame to other this node of node report that comprises network management entity with topology; for bus topology; star and tree-like this three class are not protected its topological state of node report of the topological structure of switch function owing to the topological structure reason; represent when type field value is binary value " 00000001 " among the control frame TLV that control frame is the Topology Discovery claim frame; be the Topology Discovery response frame during binary value " 00000010 "; represent during binary value " 00000011 " that control frame is a topology report frame; the Topology Discovery claim frame; the value of Topology Discovery response frame and topology report frame is that the value of Value field all is two parameters; first parameter is a node address; length is 8 bytes; second parameter is the node operating state; length is 1 byte, and the node operating state is as shown in table 8.
Second parameter of table 8. Topology Discovery frame
Figure FSB00000296429000101
9. method according to claim 7; it is characterized in that; the network control administrative mechanism that the data link layer protocol of described definition provides comprises 2 layers of wrap protection; 2 layers of protection are switched to refer to and allow to realize the function that network self-healing recovers when the network physical link breaks down in 50 milliseconds; 50 milliseconds of protection switch functions that DLP provides are used for can realizing protecting annular or the network topology link of switching; certain DLP node is assumed to node 2 in certain direction on ring or the grid; be assumed to from node 1 to node 2; in 20 milliseconds of times, do not receive and comprise Frame; control frame; traffic management frame or empty frame break down at interior any data message or physical link; this node enters 2 layers of protection switch status; sending 2 layers of guard mode claim frame is that L2PS_Request frame is assumed to node 1 to node coupled on the network; node 1 receives and also enters 2 layers of protection switch status behind these 2 layers of guard mode claim frames is the L2PS attitude; and send 2 layers of protection switch status and report that frames are that L2PS_State_Report frame gives the node that connects network management entity or is broadcast to all nodes that are in normal state on the ring; the time value that receives any data message in the described stipulated time is programmable; the default value of DLP definition is 20 milliseconds; in the L2PS attitude; all packets of 2 are switched on the standby path from node 1 to node; in case the fault clearance on the node 2; node 2 enters normal state; starting WTR Wait-to-Restore timer is Timer_WTR; the Timer_WTR value is programmable; scope is 0～1800 second; default value is 10 seconds; in case the WTR timer stops; it is that WTR_Request frame is to node 1 that node 2 sends the WTR claim frame along the path before and after switching; node 1 returns normal state from the L2PS attitude after receiving this frame; when being binary " 00000100 ", the type field value of DLP definition control frame represents that control frame is 2 layers of protection switching request frame; when being binary " 00000101 ", the type field value of control frame represents that control frame is that response frame is switched in 2 layers of protection; when being binary " 00000110 ", the type field value of control frame represents that control frame is that the report frame is switched in 2 layers of protection; the parameter that 2 layers of protection switching request frame TLV structure intermediate value is the Value field has 2; first parameter is this address of node sign indicating number; length is 8 bytes; second parameter is Forced Switch FS for the operating state of this node; physical signalling inefficacy PSF; a kind of in physical signalling degeneration PSD and the Manual Switch; length is 1 byte; the binary value of each state is as shown in table 9; other values of this byte keep to be done to use in the future; the parameter that value field in the response frame TLV structure is switched in 2 layers of protection has two; first parameter is this address of node sign indicating number; length is 8 bytes; second parameter length is 1 byte; wherein binary value is successfully realized switching for " 00000000 " is represented; binary value is switched unsuccessful for " 11111111 " expression; other binary values keep to using in the future; 2 layers of protection are switched and are reported that value field has three parameters in the frame TLV structure; first parameter is the address of node sign indicating number; length is 8 bytes; second parameter is the reason of switching of node; length is 1 byte; the binary value of each attitude is as shown in table 9; whether the 3rd parametric representation node is in 2 layers of guard mode; wherein binary value is in 2 layers of protection switch status for " 11111111 " expression; binary value is in normal state for " 00000000 " expression; other are worth reservation; when control frame TLV type field value is binary " 00010000 "; the expression control frame is the WTR_Request frame; the WTR_Request frame has only a parameter; length is 8 bits; value is represented successful Wait-to-Restore for binary " 11111111 ", and other are worth reservation.
The 2nd parameter type of table 9.L2PS claim frame and L2PS report frame
Binary value State 10000000 Forced Switch, English is Forced Switch, is abbreviated as FS 00100000 Physical signalling lost efficacy, and English is Physical Signal Fail, is abbreviated as PSF 00001000 Physical signalling is degenerated, and English is Physical Signal Degrade, is abbreviated as PSD 00000010 Manual Switch, English is Manual Switch, is abbreviated as MS Other Keep
10. method according to claim 7, it is characterized in that, the network control administrative mechanism that the data link layer protocol of described definition provides comprises deployment management mechanism, deployment management mechanism is used for realizing that to network node be the relevant configuring ports management of DLP node device, the port address of apparatus for network node must dispose one two layers address as the source address sign indicating number of this port in the installation of project stage, the configuration management frame comprises three kinds: the configuring request frame, English is Configuration_Request frame, the configuration response frame, English is Configuration_Response Frame, the configuration report frame, English is Configuration_Report frame, during installation of project stage or engineering operation, network management entity is that port sends the configuring request frame and is configured by network management interface to each link of apparatus for network node, the DLP node responds to network management entity by configuration response frame or configuration report frame, represent that control frame is the configuring request frame when type field value is binary system " 00000111 " value among the DLP protocol definition control frame TLV, be the configuration response frame during binary system " 00001000 ", represent during binary system " 00001001 " that control frame is the configuration report frame, the configuring request frame comprises two parameters, first parameter is the origin node address, first parameter field length is 8 bytes, second parameter is the new node address sign indicating number, second parameter field length is 8 bytes, the value of configuration response frame is that the Value field value comprises three parameters: first parameter is the origin node address, field length is 8 bytes, second parameter is new node address sign indicating number, field length is 8 bytes, the 3rd parameter length is 1 byte, its binary value is " 00000000 " expression configuration successful, binary value " 11111111 " expression configuration is unsuccessful, other value keeps to give in the future to be used, the configuration report frame comprises two parameters: first parameter is a node address, field length is 8 bytes, second parameter length is 8 bytes, represents the configuration address of this node.
11. method according to claim 7, it is characterized in that, the network control administrative mechanism that the data link layer protocol of described definition provides comprises fault management mechanism, fault management mechanism is used for realizing the fault management to network node, fault management capability is realized by the fault management frame, the fault management frame comprises three: the fault inquiry claim frame is English to be Fault_Inquiry_Request frame, fault inquiry response frame English is the English Fault_Report frame of being of Fault_Inquiry_Response frame and Trouble Report frame, represent that control frame is the fault inquiry claim frame when type field value is binary value " 00001010 " among the DLP protocol definition control frame TLV, be the fault inquiry response frame during binary value " 00001011 ", represent during binary value " 00001100 " that control frame is the Trouble Report frame, the fault inquiry claim frame comprises 1 parameter, this parameter is a node address, field length is 8 bytes, the value of fault inquiry response frame is that the Value field value comprises two parameters: first parameter is a node address, field length is 8 bytes, second parameter length is that 1 byte is used for representing fault type, its binary value is that physical signalling inefficacy english abbreviation is PSF for " 00000000 " expression fault, binary value " 11111111 " expression fault is that physical signalling degeneration english abbreviation is PSD, binary value is the normal fault-free of " 00001111 " expression node, other value keeps to give in the future to be used, the value field of Trouble Report frame comprises two parameters: first parameter is a node address, field length is 8 bytes, second parameter length is that 1 byte is used for representing fault type, its binary value is that physical signalling lost efficacy for " 00000000 " expression fault, english abbreviation is PSF, binary value " 11111111 " expression fault is that physical signalling is degenerated, english abbreviation is PSD, and other value keeps to give in the future to be used.
12. method according to claim 7, it is characterized in that, the network control administrative mechanism that the data link layer protocol of described definition provides comprises performance management mechanism, performance management mechanism is used for realizing to network node to be the performance management of DLP node, performance management function through performance management frames realizes, the performance management frame comprises three kinds of frames: the performance queries claim frame is English to be Performance_Inquiry_Request frame, performance queries response frame English is the English Performance_Report frame of being of Performance_Inquiry_Response frame and performance report frame, when the control frame type field value is binary " 00001101 ", the expression control frame is the performance queries claim frame, it is the network administration properties index of DLP node that the performance queries claim frame is used for asking the requester network node, when the control frame type field value is binary " 00001110 ", the expression control frame is the performance queries response frame, the performance queries response frame is used for the network administration properties index of the network node that response performance query requests frame proposes, when the control frame type field value is binary " 00001111 ", the expression control frame is the performance report frame, the performance report frame is used for to every performance index of network management entity reporting ent node, the value of performance queries claim frame is that the Value field comprises three parameters, first parameter is for asking the node address sign indicating number of query performance, length is 8 bytes, second parameter is the time measurement unit that is used for identifying calculation of performance indicators, length is 4 bits, wherein binary " 0001 " expression unit of measurement is second, binary " 0010 " expression unit of measurement is minute, binary " 0011 " expression unit of measurement is hour, binary " 0100 " expression unit of measurement is the sky, other field value keeps to using in the future, the 3rd parameter is the performance index type, length is 4 bits, wherein binary " 0001 " expression performance index are Frame Check Sequence mistake number, binary " 0010 " expression number of dropped packets, binary " 0011 " expression packet loss, the time delay of binary " 0100 " expression bag, it is time delay, other value keeps to give in the future to be used, the value of performance queries response frame is that the Value field comprises 4 parameters, first parameter length is 8 bytes, be used for representing node address that the performance queries claim frame is responded, second parameter length is 4 bits, be used for identifying the time measurement unit of calculation of performance indicators, the 3rd parameter length is that 4 bits are used for identifying the performance index type, the 4th parameter length is 3 bytes, be used for representing the performance index value that specifically will inquire about, the value of performance queries response frame is that second of Value field is that usage and the value of performance queries claim frame of time unit of measurement and performance index type is that the usage of second and the 3rd parameter of Value field is the same with the 3rd parameter, the value of performance report frame is that the Value field comprises 4 parameters, first parameter length is 8 bytes, be used for representing to report the node address of its performance to network management entity, second parameter length is 4 bits, be used for identifying the time measurement unit of calculation of performance indicators, the 3rd parameter length is that 4 bits are used for identifying the performance index type, the 4th parameter length is 3 bytes, be used for representing that the performance index value that specifically will report, the value of performance report frame are that second of Value field is that usage and the value of performance queries claim frame of time unit of measurement and performance index type is that the usage of second and the 3rd parameter of Value field is the same with the 3rd parameter.
13. method according to claim 1 is characterized in that, the data link layer protocol of described definition provides traffic management mechanism to realize the traffic engineering of network, method is that at first convection current is classified through all business of network, promptly to the speech that comprises from the upper strata, the IP data, Digital Television, the ethernet mac frame, TDM circuit simulation signal carries out priority classification at interior miscellaneous service and is divided into the business of high priority and the business of low priority, is that source address sign indicating number and destination address representation upper-layer service address are destination address and source address with two layers the data-link layer address of being positioned at of classification, simultaneously to business according to country or geographic area, economize, the area, county, city, villages and towns classify, thereby represent that with the L2 address of classification physical link port L2 address carries out the classification of countries to physical resource, distribute different band width in physical links to be used to transmit dissimilar business simultaneously, the miscellaneous service of the whole network of flowing through is mapped on the actual physical link according to different priority type and region classification, realizes the flow and the bandwidth resources of whole network are unified dispatching management and monitoring by the traffic management frame, specific as follows: at first to from data link layer--all business of the above level of DLP layer are classified, be divided into the business of high priority and the business of low priority, the business packet includes network managing control information of high priority is a control frame, traffic management information is the traffic management frame, the various real-time voice service that comprises fixing or mobile voice or video telephone, the various real-time videos that comprise Digital Television, IP-based real time business, PDH and SDH/SONET circuit simulation signal, the business of low priority are general IP data service, concrete various types of traffic is identified by the business type field value in the data link layer protocol frame of described definition, has defined the destination address sign indicating number and the source address sign indicating number of a classification in the data link layer protocol frame of described definition, and the destination address sign indicating number adopts identical structure with the source address sign indicating number, all by national code, domestic area code, station code and personal code work four parts are formed, and are used for concrete country or geographic area under the identification service respectively, the concrete province or the state, concrete node and concrete specific user are for IP operation, destination address sign indicating number and source address sign indicating number are represented the purpose IP address in the IP packet head and the forwarding equivalence class of source IP address respectively, represent the telephone number of both call sides respectively for voice service destination address sign indicating number and source address sign indicating number, represent the address of Digital Television transmitting terminal and receiving terminal respectively for digital television business destination address sign indicating number and source address sign indicating number, for the ethernet mac frame, PDH, SDH/SONET circuit simulation signal service destination address sign indicating number and source address sign indicating number are represented the address of signal sending end and receiving terminal respectively, like this by data-link layer address to the speech that comprises from the upper strata, data, video, Ethernet and TDM circuit simulation signal have carried out the classification of region at interior miscellaneous service, miscellaneous service according to country, province/state, the area, county, city, villages and towns, network node and particular user are classified, each node port that whole physics is transmitted network comprises that the data-link layer address of one two layers of each light-wave identifications of wavelength-division multiplex system is the source address of DLP frame simultaneously, and network bandwidth resources is classified to the bandwidth resources that whole physics transmits network according to type of service and geographic area, according to type of service and network traffics Internet resources is dispatched, part bandwidth is used to transmit important real time business, part bandwidth is used to transmit general IP data service, and a part of bandwidth link is used to transmit international business, and a part of bandwidth link is used to transmit business transprovincially, distribute certain bandwidth link to be used to transmit local service, the break down link of the service occupation low priority traffice that allows high priority of network, traffic engineering realizes that by the traffic management frame traffic management frame is monitored processing to the flow and the network bandwidth resources of whole network, network management system comprises a traffic engineering database, this data-base recording the link circuit resource distribution situation of whole network, flow through the type of service of network, the overall budget number, total flow, physical link speed, allow maximum transfer rate, when the data link layer protocol frame of described definition is when the business type field value is set to binary value " 10000010 " in the DLP frame header, represent described definition data link layer protocol frame encapsulation be traffic management information, corresponding data link layer protocol frame is the traffic management frame, and the traffic management information of traffic management frame adopts the type-length-value structure, and English is Type-Length-Value, english abbreviation is TLV, wherein, type field length is 8 bits, is used to refer to the type of traffic management frame, length field length is 8 bits, being used for byte form indicated value is the length of Value field, and value is that the Value field comprises concrete traffic management content frame, and the usage of network management frame type field is as shown in table 10, what represent when wherein type field value is binary " 00000001 " among the traffic management frame TLV that traffic management frame payload carries is link traffic flow attribution information, its value is that the Value field contents comprises four parameters, and first parameter is a node address, and length is 8 bytes, second parameter is type of service, be used for representing that length is 1 byte through the affiliated type of service of network node flow bag, the service class offset of dissimilar business is determined by table 1, the 3rd parameter length is that 1 byte is used for identifying the measuring parameter type that flows through the network node link flow, wherein binary value is a peak rate for " 00000001 " expression flow measurement parameter type, and unit is a bits per second, and binary value is a Mean Speed for " 00000010 " expression flow measurement parameter type, unit is a bits per second, binary value is that " 00000011 " expression flow measurement parameter type is maximum bag number, and unit is the bag per second, and binary value is an average number of packets for " 00000100 " expression flow measurement parameter type, unit is the bag per second, binary value is the peak value burst length for " 00000101 " expression flow measurement parameter type, and unit is a byte, and binary value is that " 00000110 " expression flow measurement parameter type is the agreement burst length, unit is a byte, binary value is a burst excess length for " 00000111 " expression flow measurement parameter type, and unit is a byte, and other value keeps to give in the future to be used, the 4th parameter length is the value that 4 bytes are used for identifying concrete various flows, represent the Resource Properties of various physical links when type field value is binary system " 00000100～00100111 " among the traffic management frame TLV, the types value of various concrete links is as shown in table 10, and the source attribute values of various physical links includes four parameters, first parameter is a node address, length is 8 bytes, and second parameter is type of service, is used for representing through the affiliated type of service of node flow bag, length is 1 byte, the service class offset of dissimilar business determines that by table 1 the 3rd parameter length is that 1 byte is used for identifying the measuring parameter type that flows through the node link flow, and wherein binary value is a peak rate for " 00000001 " expression flow measurement parameter type, unit is a bits per second, binary value is a Mean Speed for " 00000010 " expression flow measurement parameter type, and unit is a bits per second, and binary value is the largest packet number for " 00000011 " expression flow measurement parameter type, unit is the bag per second, binary value is that average packet is a packet count for " 00000100 " expression flow measurement parameter type, and unit is the bag per second, and binary value is the peak value burst length for " 00000101 " expression flow measurement parameter type, unit is a byte, binary value is that " 00000110 " expression flow measurement parameter type is the agreement burst length, and unit is a byte, and binary value is a burst excess length for " 00000111 " expression flow measurement parameter type, unit is a byte, other value keeps to give in the future to be used, and the 4th parameter length is the value that 4 bytes are used for identifying concrete various flows, and the number of frames value of the data link layer protocol traffic management frame of described definition is used for identifying the sequencing that the traffic management frame sends, realize that the data link layer protocol flow control management information of the described definition of sign sends the function of sequencing, the data link layer protocol of described definition is that the payload information field of DLP traffic management frame comprises one or more traffic management TLV information.
The usage of table 10. traffic management frame type field
The binary value of type field Usage 00000000 Keep 00000001 The link flow attribute 00000010 10Mbps ethernet link attribute 00000011 100Mbps ethernet link attribute 00000100 10/100Mbps ethernet link attribute 00000101 The gigabit ethernet link attribute 00000110 10Gb/s ethernet link attribute 00000111 STM-0 SDH link attribute 00001000 STM-1/OC-3c SDH link attribute 00001001 STM-4/OC-12c SDH link attribute 00001010 STM-16/OC-48c SDH link attribute 00001011 STM-64/OC-192c SDH link attribute 00001100 STM-256/OC-768c SDH link attribute 00001101 64 kilobits/second physical link attributes 00001110 1544 kilobits/second PDH link attributes 00001111 2048 kilobits/second PDH link attributes 00010000 6312 kilobits/second PDH link attributes 00010001 8448 kilobits/second PDH link attributes 00010010 34368 kilobits/second PDH link attributes 00010011 44736 kilobits/second PDH link attributes 00010100 139264 kilobits/second PDH link attributes 00010101 IEEE 802.11a link attribute 00010110 IEEE 802.11b link attribute 00010111 IEEE 802.11g link attribute 00011000 IEEE 802.11h link attribute 00011001 The GSM link attribute 00011010 IEEE 802.16a link attribute, frequency are 2-11GHz 00011011 IEEE 802.16c link attribute, frequency are 10-66GHz 00011100 The WCDMA link attribute 00011101 The TD-SCDMA link attribute 00011110 The CDMA2000 link attribute 00011111 The DVB link attribute 00100000 The MPEG-1 link attribute 00100001 The MPEG-2 link attribute 00100010 The MPEG-3 link attribute 00100011 The isdn link attribute 00100100 The adsl link attribute 00100101 The VDSL link attribute 00100110 Other xDSL link attributes 00100111～11111111 Keep
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