CN101754061B - Multi-business unified crossing method and device - Google Patents
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Abstract
The embodiment of the invention provides a multi-business unified crossing method and a device. The method comprises the steps of obtaining and reporting a bandwidth request message of a local branch interface to a network host, wherein the bandwidth allocation information comprises a bandwidth map and multicast/broadcast control information; filtering T-CONT frames according to the instruction of the bandwidth map; carrying out crossing treatment on the T-CONT frames which need to be processed by a local node after filtration according to the multicast/broadcast control information, and caching the T-CONT frames after the crossing treatment; reconstructing the cached T-CONT frames to TC frames according to time slot positions of all the T-CONT frames in the TC frames instructed in the bandwidth map, then sending the TC frames to a circuit unit through a circuit interface, and sending the T-CONT frames which need the local downlink to a branch unit through a branch interface. The method can realize a time slot-based multi-business unified crossing plane, be simple to realize and meet dynamic bandwidth adjustment and service quality demands when carrying data business.
Description
Technical field
The present invention relates to data communication field, be specifically related to a kind of method and apparatus of multi-business unified crossing.
Background technology
The present network carrying multiple business, as voice, video, online game, network browsing etc.Over the past two years, very great telecommunications operator's project has all been selected with gigabit passive optical network (GPON, Gigabit-Passive Optical Network) solution that inserts as following big band optical fiber, require MAN to possess the ability of docking with GPON on the one hand, support following optical fiber to insert the development of (FTTx), on the other hand the bandwidth of MAN is also had higher requirement.The employing of high-capacity optical fiber digital-communications transmission system, and the introducing of various novel business make communication network be tending towards complicated, and capacity is also increasing.In order to protect effectively and the supervisory communications network; be convenient to control and distribution network bandwidth resources; in time provide highly reliable, low-cost and flexile service for various user; must make communication network possess the ability that fast and effeciently to redistribute circuit according to demand, manage effectively, control and distribution network bandwidth resources.
A good metropolitan area transport network should be a general transmission platform, high-efficiency reliable transmission miscellaneous service.This just needs metropolitan area network equipment when guaranteeing TDM (Time Division Multiple, time division multiplexing) business support, to support the several data interface at the variation of data service type and the probabilistic characteristics of service traffics.In this case, how to realize TDM professional and the unified carrying of data service and unified scheduling, and the guaranteed qos requirement, a urgent problem become.
Present MAN, SDH (Synchronous Digital Hierarchy is arranged, SDH (Synchronous Digital Hierarchy)), MSTP, (Multi-Service Transport Platform, multi-service transport platform), PTN (PacketTransport Network, Packet Transport Network), 2 layers of various ways such as Ethernet.Multiple load mode is also deposited, and the complicated network structure, service transparency is poor, the bearing technology kind is many, maintenance management is difficult.In these numerous tranmission techniques, the cross scheduling form also is varied, as: (1) is in the SDH system, adopt the high-order intersection of VC-4 particle and the low order interlace algorithm of VC-12 particle, because VC-4 and VC-12 have fixing separately position in frame structure, can arrange a VC-4 or 63 VC-12 as a STM-1 frame, bandwidth can not be adjusted, inconvenient bearing data service; (2) a plurality of crossing plane of TDM and data service: in order to realize multiple services carrying and scheduling, a kind of simple way is exactly to design the TDM intersection (VC-4 and VC-12 as SDH intersect) and the L2 layer of data service that have based on sequential to exchange two crossing plane in the cross system that transmits net equipment.
In the research practice process to prior art, the inventor finds to exist at least in the prior art following defective: these modes all do not have really to realize the multi-business unified crossing plane, there is not strict QoS to guarantee, there is not real-time dynamic bandwidth to adjust mechanism yet, be inconvenient to carry the multiple business form, the paroxysmal demand of network when being difficult to satisfy bearing data service.In a word, press in the prior art a kind of simple relatively, support the unified carrying of multi-service and unified scheduling, support the interconnection technology of dynamic bandwidth adjustment, guaranteed qos requirement, and corresponding product form and framework.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of multi-business unified crossing, the paroxysmal demand of network in the time of can supporting the unified carrying of multi-service and unified scheduling, support dynamic bandwidth adjustment, guaranteed qos requirement and satisfy bearing data service.
The embodiment of the invention is achieved through the following technical solutions:
One embodiment of the invention provides a kind of method of multi-business unified crossing, comprising:
Main control unit is used for obtaining and reports the bandwidth request information of local node tributary interface to give network host, and receives the bandwidth allocation information that issues from network host; Described bandwidth allocation information comprises bandwidth map and multicast/broadcast control information;
Filter element is used for the indication based on described bandwidth map, obtains the time slot position of each T-CONT frame in the TC frame that receives by line interface, and the T-CONT frame of each time slot position correspondence is filtered;
The T-CONT cross unit is used for carrying out cross processing according to described multicast and broadcast control information at the T-CONT frame of this node processing after filtering through described filter element; To sending to tributary unit by tributary interface at the T-CONT frame on this underground road;
The T-CONT buffer unit is for the T-CONT frame after the cross processing of the described T-CONT cross unit of buffer memory process;
TC frame recomposition unit is used for the time slot position according to each T-CONT frame of TC frame of described bandwidth map indication, and the T-CONT frame of buffer memory in the described T-CONT buffer unit is reassembled as the TC frame, then the TC frame is sent to line unit by line interface.
Another embodiment of the present invention provides a kind of method of multi-business unified crossing, comprising:
Obtain and report the bandwidth request information of local tributary interface to give network host;
Receive the bandwidth allocation information that described network host issues; Described bandwidth allocation information comprises bandwidth map and multicast/broadcast control information;
Based on the indication of described bandwidth map, obtain each T-CONT frame slot position in the TC frame that receives by line interface, the T-CONT frame of each time slot position correspondence is filtered;
To carrying out cross processing according to described multicast and broadcast control information at the T-CONT frame of this node processing after filtering, the T-CONT after the cross processing is carried out buffer memory;
Time slot position according to each T-CONT frame in the TC frame of described bandwidth map indication, the T-CONT frame of buffer memory is reassembled as the TC frame, then the TC frame is sent to line unit by line interface, to after filtering need this underground road the T-CONT frame send to tributary unit by tributary interface.
Above technical scheme as can be seen, by report the bandwidth request information of each service port to network host, obtain the bandwidth allocation information of each business interface from network host, obtain each professional shared time slot position, can realize based on time slot multi-business unified crossing plane, bandwidth is adjusted fine size, and dynamic bandwidth is adjusted and the QoS demand in the time of can satisfying bearing data service.
Description of drawings
Fig. 1 is the frame structure schematic diagram of the E-GEM frame that provides of the embodiment of the invention;
Fig. 2 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention one;
Fig. 3 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention two;
Fig. 4 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention three;
Fig. 5 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention four;
Fig. 6 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention five;
Fig. 7 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention six;
Fig. 8 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention seven;
Fig. 9 is the device schematic diagram of the multi-business unified crossing that provides of the embodiment of the invention eight;
Figure 10 is the method flow diagram of the multi-business unified crossing that provides of the embodiment of the invention nine.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.With reference to the accompanying drawings the embodiment of the invention is described in detail:
Can encapsulate advantage with adaptive multiple business based on GEM frame in the GPON system, and can at more than the Access Layer, metropolitan area or wider application, in the GEM frame, increase purpose and source sign, constitute GEM (E-GEM) frame that strengthens.The frame structure of this E-GEM frame as shown in Figure 1, frame head comprises payload length, service identification, frame type, four fields of a verification.The data field comprises professional purpose sign and source sign, and payload user data.Wherein, " payload length " refers to the length of payload user data, and unit is byte, and purpose sign and source sign are made as fixed word joint number length, then can be used for determining the postamble of E-GEM by payload length; " service identification " is to sign professional in the network node, such as corresponding to concrete type of service, physical port; " frame type " is the packet for some data length overlength, when needing a plurality of E-GEM bursts to encapsulate, is used to refer to intermediate frame or tail frame; " verification " then is that the data of each field of frame head are carried out cyclic redundancy check (CRC), can be used for locating the original position of E-GEM.
Embodiment one,
Referring to Fig. 2, this embodiment provides a kind of device schematic diagram of multi-service Unified Form E-GEM exchange, and the device of described multi-service Unified Form E-GEM exchange comprises: T-CONT buffer unit 101, up processing unit 102, downlink processing unit 103 and tributary interface 104.
T-CONT buffer unit 101 is used for pending T-CONT frames such as storage.
Up processing unit 102, for in the centralized processing unit of up direction at all tributary units of intranodal, be used for by the E-GEM frame of tributary interface 104 receptions from the different branch unit, the E-GEM frame that receives is carried out node label to be filtered, as identifying according to " purpose sign " in the node label whether the E-GEM frame that receives is the E-GEM frame of this node, the E-GEM frame that " purpose sign " is belonged to this node is categorized in together, and the E-GEM frame that " purpose sign " is not belonged to this node is categorized in together.E-GEM frame after filtering through node label is done following processing: be not the E-GEM frame of this node for " purpose sign ", mean other node that need send to except this node, then the E-GEM frame is carried out buffer memory, with in the up processing unit 102 other etc. pending E-GEM frame together, according to principles such as type of service, priority and destination addresses, form the T-CONT frame, send to high-order cross unit 108 through T-CONT buffer unit 101; Be the E-GEM frame of this node for " purpose sign ", mean it is operation exchange between the inner different branch interface of local node, then send to downlink processing unit 103.For example, provided two tributary units among Fig. 2: tributary unit 105 and tributary unit 106, the dotted line among the figure are illustrated in the service route that carries out local exchange between tributary unit 105 and the tributary unit 106.
Optionally, in up processing unit 102, also comprise an allocated bandwidth unit 107, be used at the E-GEM frame that is packaged with different kinds of business, concentrate and carry out allocated bandwidth one time.Concrete, different E-GEM frames are packaged with different types of service, as be packaged with TDM, SDH/SONET (Synchronous Optical Network, synchronous optical network), the E-GEM frame of private line service is FB (FixedBandwidth, fixed-bandwidth) class, be packaged with video, VOIP (Voice over Internet Protocol, voice based on the IP agreement), the E-GEM frame of business such as special line is AB (Assured Bandwidth, guarantee bandwidth) class, the E-GEM frame that is packaged with network browsing class business is BE (Best Effort, send as possible) class, according to their type, in this node inside, in up total bandwidth, according to the type of service of E-GEM frame, the transmission bandwidth of all kinds of E-GEM frames is calculated and distributed to priority etc.This allocated bandwidth unit 107 also can be positioned at tributary unit.Different is, is positioned at different tributary units, is a kind of distributed treatment; Being positioned at unified up processing unit 102, then is that processing method is identical towards the focusing on of all tributary units of intranodal.
In the present embodiment, local service is fitted to the E-GEM frame, and a plurality of E-GEM frames are formed the T-CONT frame, send to the direction that the place network gets on then, are called " up direction (or Add direction) "; Otherwise, receiving the T-CONT frame and deblocking is dressed up a plurality of E-GEM frames from network, the direction on road is called " down direction (or Drop direction) " under the local node.
This embodiment has described for the device that carries out " E-GEM exchange " between the intra-node different branch unit.The professional scheduling entity of " E-GEM exchange " is the E-GEM frame.But for the scheduling of the business between each node in the network, as professional break-through, broadcast, set out on a journey or following road etc., consider that exchange efficiency can not be too low, the scheduling particle can not be too little, and professional QoS realizes and will make things convenient for, therefore the intersection that needs higher level, as between channel layer T-CONT, intersecting, i.e. " T-CONT intersection ".At this, " E-GEM exchange " and " T-CONT intersection " can be called " low order interlace algorithm " and " high-order intersection ".Below the high-order skewing mechanism is described.
Embodiment two,
Referring to Fig. 3, the professional skewing mechanism schematic diagram that this embodiment provides a kind of T-CONT to intersect and dispatch, described professional skewing mechanism comprises: main control unit 201, tributary interface 202, filter element 203, cross unit 204, line interface 205.
Be example with group monocycle application scenarios, be used for that T-CONT intersects and the skewing mechanism of scheduling is divided into east, west to line interface and three directions of tributary interface.Line interface 205 is used for the butt joint line unit, sends on the physical fiber of place network for physical layer TC frame, and line interface 205 can be the empty frame (being that physical layer overhead is imperfect) of TC frame or TC.Tributary interface 202 is used for and the tributary unit butt joint, and for the local service He Xialu that sets out on a journey, tributary interface 202 can be E-GEM frame interface or T-CONT frame interface or TC frame interface (the empty frame interface of TC).If the T-CONT frame interface does not then need buffer unit and TC frame recomposition unit.
Wherein, the TC frame is to the form after a plurality of T-CONT frame encapsulation, comprise as TC: T-CONT-1, T-CONT-2, for T-CONT-1 distributed time slot position is 200～300 bytes, is that T-CONT-2 distributed time slot position is 400～520 bytes, add the time slot of expense, total time slot is formed a TC frame.Described expense comprises frame synchronization administration overhead, bandwidth map indication etc.
Do not belong to the T-CONT frame of this node for " node identification ", then be left intact, break-through gets final product to another direction.
Optionally, when tributary interface 202 is the TC frame interface, also comprise in the present embodiment: T-CONT buffer unit 206, for all T-CONT frames that are buffered in this underground road.
TC frame recomposition unit 207 is used for the time slot position according to each T-CONT frame of TC frame of bandwidth map indication, and the T-CONT frame of buffer memory in the T-CONT buffer unit 206 is reassembled as the TC frame, then the TC frame is sent to tributary interface 202.
Come from east, west to some directions no matter be, the T-CONT frame that process filter element 203 and cross unit 204 obtain, it still is the T-CONT frame of setting out on a journey from tributary unit, all to carry out buffer memory through T-CONT buffer unit 206, then 207 li of TC frame recomposition unit, each T-CONT time slot position according to bandwidth map indication reassembles into the TC frame with the T-CONT frame, by optical fiber eastwards, the west sends to another direction of correspondence.
In the present embodiment, depending on time slot that bandwidth map divides intersects and dispatches, scheduling entity is the T-CONT frame, it can be according to the demand of business, under the guidance of DBA algorithm, for unit carries out the bandwidth adjustment, make things convenient for the adjustment of dynamic bandwidth according to 1byte (corresponding bandwidth is 64Kbps under the 8k frame frequency).
Embodiment three,
Referring to Fig. 4, it is a kind of based on the multi-business unified crossing device schematic diagram that high-order intersects and centralized low order interlace algorithm designs that this embodiment provides, and described multi-business unified crossing device comprises: low order interlace algorithm unit 301, high-order cross unit 302, tributary unit 303, line unit 304;
Low order interlace algorithm unit 301, low order cross unit 301 is an E-GEM crosspoint, is connected with tributary unit by tributary interface, docks with high-order cross unit 302 by intermediary interface.Low order interlace algorithm unit 301 is used for receiving the E-GEM frame from tributary unit, according to " node identification " in the E-GEM frame and " service identification ", to focusing in the business of this locality exchange, concrete processing procedure can be referring to embodiment one, repeat no more herein, in the remaining business in exchange back, this locality, send to high-order cross unit 302 by intermediary interface.Wherein, tributary interface interface shape the simplest, most convenient is exactly the E-GEM frame interface; Intermediary interface can have a variety of forms, and as adopting the empty frame interface of physical layer TC, because the intermediary interface of this moment is consistent with line interface, then the capacity of high-order cross unit 302 can dispose arbitrarily between line interface and low order interlace algorithm unit 301, and is unrestricted.If intermediary interface and line interface are inconsistent, as adopting the T-CONT frame interface, then the bus that connects between high-order cross unit 302 and the low order interlace algorithm unit 301 will take a part of cross-capacity, and causing can not the flexible configuration circuit and the cross-capacity of branch road.
High-order cross unit 302 is connected with line unit 304 by line interface, is connected with low order interlace algorithm unit 301 by intermediary interface.High-order cross unit 302 is used for 301 receiving the T-CONT frames by intermediary interface from the low order interlace algorithm unit, perhaps from east, the west receives the T-CONT frames to the line unit 304 of some directions, " node identification " belonged to the T-CONT filtering frames that this node handles get off, through sending to east, west after the cross processing to the line unit 304 of another direction of correspondence; To need then sending to tributary unit 303 in the business on this underground road; Do not belong to the T-CONT frame of this node for " node identification ", then be left intact, break-through is to another direction.
Wherein, line interface can be the empty frame interface of TC frame interface or TC, the TC frame interface has complete TC frame overhead, be fit to line unit and cross unit are integrated, the empty frame interface of TC has the data structure of TC frame, but do not have complete TC frame overhead, be suitable for the separately design of line unit and cross unit.
Embodiment four,
Referring to Fig. 5, this embodiment provides the multi-business unified crossing device schematic diagram based on high-order intersection and the design of centralized low order interlace algorithm of another kind of form, and described multi-business unified crossing device comprises: low order interlace algorithm unit 401, high-order cross unit 402, tributary unit 403, line unit 404;
Low order interlace algorithm unit 401, low order cross unit 401 is the 2nd E-GEM crosspoint, link to each other with high-order cross unit 402 by intermediary interface, as required, the T-CONT frame that " node identification " that receive from high-order cross unit 402 by intermediary interface is belonged to this node, further be descapsulated into the E-GEM frame, according to " service identification " in the E-GEM frame, carrying out cross processing in the business of this locality exchange, focus on E-GEM frame after finishing and reassemble into the T-CONT frame and turn back to high-order cross unit 402.
High-order cross unit 402 is connected with line unit 404 with tributary unit 403 by line interface, is connected with low order interlace algorithm unit 401 by intermediary interface.Be used for the T-CONT between line unit and the line unit, between line unit and the tributary unit is intersected; Perhaps as required, the T-CONT frame is further separated frame obtain the E-GEM frame, by intermediary interface the E-GEM frame is sent to low order interlace algorithm unit 401, finish the low order exchange between the E-GEM frame;
In the present embodiment, tributary unit has the interface the same with line unit, adopts this interleaved mode, can guarantee that the motherboard interface is unified in equipment.
Embodiment five,
Referring to Fig. 6, this embodiment provides a kind of and has intersected and centralized low order interlace algorithm integrates the multi-business unified crossing device schematic diagram of design based on high-order, and described multi-business unified crossing device comprises: low order interlace algorithm unit 501, high-order cross unit 502, tributary unit 503, line unit 504.The function of each unit is the same with embodiment three, does not repeat them here.Different with embodiment three is that among this embodiment, low order interlace algorithm unit 501 and 502 designs of high-order cross unit are in same chip, connect by internal interface, saved the physical port between low order interlace algorithm unit 501 and the high-order cross unit 502, the monolithic design, low in energy consumption, the reliability height.
Embodiment six,
Referring to Fig. 7, this embodiment provides intersecting and centralized low order interlace algorithm integrates the multi-business unified crossing device schematic diagram of design based on high-order of another kind of form, and described multi-business unified crossing device comprises: low order interlace algorithm unit 601, high-order cross unit 602, tributary unit 603, line unit 604.The function of each unit is the same with embodiment four, do not repeat them here, different with embodiment four is, among this embodiment, low order interlace algorithm unit 601 and 602 designs of high-order cross unit connect by internal interface in same chip, saved the physical port between low order interlace algorithm unit 601 and the high-order cross unit 602, the monolithic design, low in energy consumption, the reliability height.
Embodiment seven,
Referring to Fig. 8, this embodiment provides a kind of multi-business unified crossing device schematic diagram based on high-order intersection and distributed low-order cross-over design, and described multi-business unified crossing device comprises: low order interlace algorithm unit 701, high-order cross unit 702, tributary unit 703, line unit 704, framing/solution frame unit 705, branch service processing unit 706;
Branch service processing unit 706 is used for receiving from least one tributary interface professional, and the business that receives is sent to into frame unit 705, sends to low order interlace algorithm unit 701 after becoming frame unit 705 business to be encapsulated into the E-GEM frame of Unified Form.
Different with low order interlace algorithm centralized among the several embodiment in front, in this embodiment, low order interlace algorithm unit 701 distributedly is positioned at a plurality of tributary units 703.Business in each tributary unit is according to " node identification " in the E-GEM frame and " service identification ", sending to high-order cross unit 702 to remaining business by intermediary interface after the business of this locality exchange is carried out this locality exchange processing.
High-order cross unit 702 is connected with line unit 704 by line interface, is connected with tributary unit 703 by intermediary interface, is used for the T-CONT between line unit and the line unit, between line unit and the tributary unit is carried out cross processing; Do not belong to the T-CONT frame of this node for " node identification ", then be left intact, break-through is to another direction.
Wherein, line interface can be the empty frame interface of TC frame interface or TC.
Embodiment eight,
Referring to Fig. 9, this embodiment provides a kind of multi-business unified crossing device schematic diagram based on the high-order cross-over design, and described multi-business unified crossing device comprises: high-order cross unit 801, tributary unit 802, line unit 803.Different with the embodiment of front, there is not the low order interlace algorithm unit among this embodiment, have only T-CONT high-order cross unit.For the business that need between each tributary unit of local node, exchange, need send to and carry out cross processing in the high-order cross unit to the professional group separately of each bar T-CONT frame in the end tributary unit of source, turn back to the purpose tributary unit then.
High-order cross unit 801 is connected with line unit 803 by line interface, is connected with tributary unit 802 by tributary interface, is used between line unit and the line unit, the T-CONT between line unit and the tributary unit intersects.
Wherein, line interface can be the empty frame interface of TC frame interface or TC, and tributary interface can be selected consistent with line interface.
The mode that present embodiment adopts single-stage to intersect, the cross unit simplicity of design.
More than described device embodiment of the present invention, below method of the present invention has been described in detail.
Embodiment nine,
The method flow diagram that this embodiment provides can be realized by the device that embodiment two provides as shown in figure 10, comprise the steps:
S901: the local node main control unit obtains (as monitoring, statistics) and reports the bandwidth request information of local tributary interface to give network host.Network host is used for according to existing bandwidth resources, type of service, priority etc., judges and calculates, and bandwidth allocation information is issued to each node main control unit.
S902: the local node main control unit receives the bandwidth allocation information that network host issues, and obtains bandwidth map and control informations such as multicast or broadcasting.
S903: local node high-order cross unit receives data (as the T-CONT frame) by line interface, and the bandwidth map indication based on S901 obtains is retrieved as each T-CONT frame institute distributed time slot position, and the T-CONT frame of each time slot position correspondence is filtered.
S904: local node high-order cross unit carries out buffer memory to carrying out cross processing according to the multicast and broadcast control information at the T-CONT frame of this node processing after filtering to the T-CONT after the cross processing.
S905: local node high-order cross unit is according to the time slot position of each T-CONT frame in the TC frame of earth bag map indication, and the T-CONT frame of buffer memory is reassembled as the TC frame, then the TC frame sent to line unit by line interface.
S906: local node high-order cross unit is to sending to tributary unit by tributary interface at the T-CONT frame on this underground road after filtering through S903.
In the present embodiment, described method also comprises: in the S903 step, for need then not being left intact at the T-CONT frame of this node processing, break-through gets final product to another direction.
In the present embodiment, if tributary interface has been selected the TC frame interface, so for need carrying out buffer memory at the T-CONT frame on this underground road, and be reassembled as the TC frame according to the time slot position of each T-CONT frame in the TC frame of bandwidth map indication, send to tributary unit by the TC frame interface.
Embodiment ten,
This embodiment provides a kind of method flow of multi-business unified crossing, and among this embodiment, local node low order interlace algorithm unit and tributary unit butt joint are docked with local high-order cross unit by intermediary interface.This embodiment can realize that embodiment nine also comprises the steps: relatively by the device that embodiment three provides
Local node low order interlace algorithm unit receives the E-GEM frame from tributary unit, according to " node identification " in the E-GEM frame and " service identification ", handle carrying out low order interlace algorithm in the business of this locality exchange, become the T-CONT frame exchange remaining business reorganization in this locality, send to the high-order cross unit by intermediary interface and carry out the high-order cross processing.
Local node high-order cross unit receives the T-CONT frame by intermediary interface from local node low order interlace algorithm unit, through sending to east, west after the cross processing to the line unit of some directions.
This embodiment provides a kind of method flow of multi-business unified crossing, in the present embodiment, local node high-order cross unit is connected with line unit with tributary unit by line interface, be connected with the low order interlace algorithm unit by intermediary interface, this embodiment can realize by the device that embodiment four provides, embodiment nine also comprises the steps: relatively
The high-order cross unit receives the T-CONT frame by line interface from tributary unit, as required the T-CONT frame that receives is further separated frame and obtains the E-GEM frame, by intermediary interface the E-GEM frame is sent to local node low order interlace algorithm unit and carries out the low order interlace algorithm processing;
Local node low order interlace algorithm unit receives the E-GEM frame by intermediary interface from local node high-order cross unit, according to " service identification " in the E-GEM frame, to need carrying out cross processing in the business of this locality exchange, and the E-GEM frame after cross processing finished reassembles into the T-CONT frame and turns back to the high-order cross unit and carry out the high-order cross processing.
Embodiment 12,
This embodiment provides a kind of method flow of multi-business unified crossing, this embodiment can realize by the device that embodiment six provides, different with embodiment 11 is, local high-order cross unit and local low order interlace algorithm unit are integrated in the same chip, accordingly, the intermediary interface that is used for transfer of data in embodiment 11 each step is replaced with internal interface.
Embodiment 13,
This embodiment provides a kind of method flow of multi-business unified crossing, and local node low order interlace algorithm distributed unit is positioned at a plurality of tributary units, and this embodiment can realize that embodiment nine also comprises the steps: relatively by the device that embodiment seven provides
Local node low order interlace algorithm unit is to the business in each tributary unit, according to " node identification " in the E-GEM frame and " service identification ", need after the business of this locality exchange is carried out this locality exchange processing, sending to local node high-order cross unit to remaining business by intermediary interface;
Local node high-order cross unit is connected with line unit by line interface, is connected with tributary unit by intermediary interface, and the T-CONT between line unit and the line unit, between line unit and the tributary unit is carried out cross processing; Do not belong to the T-CONT frame of this node for " node identification ", then be left intact, break-through is to another direction.
Embodiment 14,
This embodiment provides a kind of method flow of multi-business unified crossing, among this embodiment, does not have the low order interlace algorithm unit, has only T-CONT high-order cross unit, this embodiment can realize that embodiment nine also comprises the steps: relatively by the device that embodiment eight provides
Source end tributary unit sends to local node high-order cross unit to the professional group separately of each bar T-CONT frame;
Local node high-order cross unit carries out cross processing to the T-CONT frame that receives, and turns back to the purpose tributary unit then.
Above embodiment as can be seen, intersect and low order interlace algorithm and high-order intersection two-stage intersection by high-order, professional unified carrying and unified crossing plane have been realized, and intersecting particle can be very little, convenient dynamic bandwidth adjustment, the paroxysmal demand of network in the time of can satisfying QoS demand and carrying multiple business of realizing.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to instruct relevant hardware to finish by program, program can be stored in a kind of computer-readable recording medium.
The above-mentioned storage medium of mentioning can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than the method and apparatus of a kind of multi-business unified crossing that the embodiment of the invention is provided be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. the device of a multi-business unified crossing is characterized in that, comprising:
Main control unit is used for obtaining and reports the bandwidth request information of local node tributary interface to give network host, and receives the bandwidth allocation information that issues from network host; Described bandwidth allocation information comprises bandwidth map and multicast/broadcast control information;
Filter element is used for the indication based on described bandwidth map, obtains the time slot position of each T-CONT frame in the TC frame that receives by line interface, and the T-CONT frame of each time slot position correspondence is filtered;
The T-CONT cross unit is used for carrying out cross processing according to described multicast/broadcast control information at the T-CONT frame of this node processing after filtering through described filter element; To sending to tributary unit by tributary interface at the T-CONT frame on this underground road;
The T-CONT buffer unit is for the T-CONT frame after the cross processing of the described T-CONT cross unit of buffer memory process;
TC frame recomposition unit is used for the time slot position according to each T-CONT frame of TC frame of described bandwidth map indication, and the T-CONT frame of buffer memory in the described T-CONT buffer unit is reassembled as the TC frame, then the TC frame is sent to line unit by line interface.
2. device according to claim 1 is characterized in that, when described tributary interface was the TC frame interface, described T-CONT buffer unit also was used for being buffered in all T-CONT frames on this underground road;
Described TC frame recomposition unit also is used for the time slot position according to each T-CONT frame of TC frame of described bandwidth allocation information indication, and the T-CONT frame of buffer memory in the described T-CONT buffer unit is reassembled as the TC frame, then the TC frame is sent to described tributary interface.
3. according to claim 1 or 2 described devices, it is characterized in that described device also comprises:
The one E-GEM crosspoint, be used for receiving the E-GEM frame from tributary unit, according to the node identification in the E-GEM frame and service identification, for exchanging processing in the business of this locality exchange, for need after the E-GEM frame of this locality exchange is formed the T-CONT frame, not sending to described T-CONT cross unit.
4. device according to claim 3 is characterized in that, described E-GEM crosspoint comprises up processing unit, downlink processing unit and tributary interface;
Described up processing unit is used for that the E-GEM frame that the tributary interface by described E-GEM crosspoint receives is carried out node label and filters, and is not the E-GEM frame of this node to purpose sign after filtering through node label, sends to described T-CONT cross unit; Identifying for purpose is the E-GEM frame of this node, then sends to described downlink processing unit;
Described downlink processing unit, carry out cross processing for the E-GEM frame that to the purpose sign is this node, carrying out the tributary interface label then filters, judge whether to meet local the transmission, if meet, according to " service identification " in the E-GEM frame, the E-GEM frame is sent to the tributary interface of corresponding type of service.
5. device according to claim 3 is characterized in that, described device also comprises: branch service processing unit, E-GEM become frame unit;
Described branch service processing unit is used for receiving business from least one tributary interface, the business that receives is sent to described E-GEM become frame unit;
Described E-GEM becomes frame unit, for sending to a described E-GEM crosspoint behind the E-GEM frame that business is encapsulated into Unified Form.
6. according to claim 1 or 2 described devices, it is characterized in that described device also comprises:
The 2nd E-GEM crosspoint, be used for belonging to from T-CONT cross unit receiving node sign the T-CONT frame of this node, and further be descapsulated into the E-GEM frame, according to the service identification in the E-GEM frame, to exchanging processing at the E-GEM frame of this locality exchange, turn back to described T-CONT cross unit after reassembling into the T-CONT frame.
7. according to any described device of claim 4 to 5, it is characterized in that described device also comprises:
The allocated bandwidth unit is used for according to described bandwidth allocation information the business that described E-GEM crosspoint receives being carried out allocated bandwidth.
8. the method for a multi-business unified crossing is characterized in that, comprising:
Obtain and report the bandwidth request information of local tributary interface to give network host;
Receive the bandwidth allocation information that described network host issues; Described bandwidth allocation information comprises bandwidth map and multicast/broadcast control information;
Based on the indication of described bandwidth map, obtain each T-CONT frame slot position in the TC frame that receives by line interface, the T-CONT frame of each time slot position correspondence is filtered;
To carrying out cross processing according to described multicast/broadcast control information at the T-CONT frame of this node processing after filtering, the T-CONT frame after the cross processing is carried out buffer memory;
Time slot position according to each T-CONT frame in the TC frame of described bandwidth map indication, the T-CONT frame of buffer memory is reassembled as the TC frame, then the TC frame is sent to line unit by line interface, to after filtering need this underground road the T-CONT frame send to tributary unit by tributary interface.
9. method according to claim 8 is characterized in that, and is described to before need sending to tributary unit by tributary interface at the T-CONT frame on this underground road after filtering when described tributary interface is the TC frame interface, also comprises:
For need carrying out buffer memory at the T-CONT frame on this underground road, and be reassembled as the TC frame according to the time slot position of each T-CONT frame in the TC frame of bandwidth map indication.
10. method according to claim 8 is characterized in that, described based on the indication of described bandwidth map be each T-CONT frame institute distributed time slot position, before the T-CONT filtering frames, also comprise:
Receive the E-GEM frame, according to the node identification in the E-GEM frame and service identification, for exchanging processing in the business of this locality exchange, for need after the E-GEM frame of this locality exchange is formed the T-CONT frame, not carrying out the T-CONT cross processing.
11. method according to claim 10 is characterized in that, before the described reception E-GEM frame, method also comprises:
Receive business, the business that receives is encapsulated into the E-GEM frame of Unified Form.
12. method according to claim 8 is characterized in that, described based on the indication of described bandwidth map be each T-CONT frame institute distributed time slot position, before the T-CONT filtering frames, also comprise:
Receiving node sign belongs to the T-CONT frame of this node, and further is descapsulated into the E-GEM frame, according to the service identification in the E-GEM frame, to exchanging processing at the E-GEM frame of this locality exchange, carries out the T-CONT cross processing after reassembling into the T-CONT frame.
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| CN 200810186519 CN101754061B (en) | 2008-12-22 | 2008-12-22 | Multi-business unified crossing method and device |
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| CN 200810186519 CN101754061B (en) | 2008-12-22 | 2008-12-22 | Multi-business unified crossing method and device |
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| CN101754061B true CN101754061B (en) | 2013-08-28 |
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Citations (3)
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|---|---|---|---|---|
| US6529502B2 (en) * | 1998-10-06 | 2003-03-04 | Vertical Networks, Inc. | Systems and methods for multiple mode voice and data communications using intelligently bridged TDM and packet buses and methods for performing telephony and data functions using the same |
| CN1832383A (en) * | 2005-03-09 | 2006-09-13 | 华为技术有限公司 | Service signal node cross dispatching method and node cross device |
| CN101145925A (en) * | 2006-09-13 | 2008-03-19 | 中兴通讯股份有限公司 | Method and system for realizing multicast service on multi-service transmission platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6529502B2 (en) * | 1998-10-06 | 2003-03-04 | Vertical Networks, Inc. | Systems and methods for multiple mode voice and data communications using intelligently bridged TDM and packet buses and methods for performing telephony and data functions using the same |
| CN1832383A (en) * | 2005-03-09 | 2006-09-13 | 华为技术有限公司 | Service signal node cross dispatching method and node cross device |
| CN101145925A (en) * | 2006-09-13 | 2008-03-19 | 中兴通讯股份有限公司 | Method and system for realizing multicast service on multi-service transmission platform |
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