CN101577843A - Method, device and system for processing multiframe - Google Patents
Method, device and system for processing multiframe Download PDFInfo
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- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
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- H—ELECTRICITY
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- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
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Abstract
The embodiment of the invention discloses a method for processing multiframes, which comprises the steps: L ascending subframes are received by an optical network unit ONU, wherein the L is an integer and is larger than 1; the received L subframes are configured into multiframes according to a bandwidth map carried by the subframes; and the multiframes are transmitted according to a transmission start point and a transmission end point carried in the bandwidth map. The invention also discloses a device and a system for processing multiframes correspondingly. The prescript of the prior technical standard does not need to be changed by using the embodiment of the invention, thereby the difficulty of the sudden transmission and the sudden reception is reduced, and the system cost is reduced. The embodiment of the invention has low implementation cost, conforms to market demands and has a wide application area.
Description
Technical field
The present invention relates to the optical communication technique field, particularly the methods, devices and systems of multi-frame processing.
Background technology
(the Passive Optical Network of PON system, EPON) generally includes optical line terminal (OLT, Optical Line Terminals, optical line terminal), optical network unit (ONU, OpticalNetwork Unit, optical network unit), passive optical splitter and ODN parts such as (Optical DistributionNetwork, optical distribution networks).Connect by trunk optical fiber between OLT and the passive optical splitter.Optical branching device is realized the luminous power distribution of point-to-multipoint, is connected to a plurality of ONU by a plurality of branch optical fibers.Trunk optical fiber between OLT and the ONU, optical branching device and branch optical fiber are referred to as optical distribution network (ODN), and the optical branch point among the ODN does not need active node device, only need a passive optical branching device to get final product.Therefore PON has bandwidth resources and shares, saves fast, the comprehensive networking low cost and other advantages of machine room investment, device security height, networking speed.Direction from OLT to ONU is called down direction, and the direction from ONU to OLT is called up direction.
GPON (Gigabit-capable Passive Optical Network, Gigabit Passive Optical Network) is a kind of PON system, and GPON has following characteristics on function and performance: 1) multiple symmetry and asymmetric up-downgoing speed can be provided neatly; 2) system be along separate routes than can being 1: 16,1: 32, and 1: 64 and even 1: 128; 3) transmission range is greater than 20KM; 4) can be fit to the adaptive of any data service; 5) transmission of the GPON fine support TDM of energy (Time Division Multiplexing, time division multiplexing) business and the timing performance of assurance; 6) GPON has perfect OAM﹠amp; P (Operation, Administration, Maintenance and Provision, Operation, Administration, Maintenance and Provision) ability.
According to the regulation of G984 series standard system, the downlink frame structure of GPON is 125 microsecond frame structures, comprises physics controll block (PCB) overhead area and payload section.Comprise physics synchronization field upstream bandwidth mapping territory US BWmap among the PCB.Wherein bandwidth map (US BWmap) is used to refer to ascending time slot starting position and the end position of each ONU, and T-CONT (transmission container) is each ONU institute distributed time slot size, and each ONU sends data by institute distributed time slot position to OLT.
The up frame length of GPON is the same with descending frame length all to be 125 microseconds; Each ONU sends the burst packet of oneself separately in the T-CONT that distributes, these burst packet comprise overhead area and payload section.
The transmission control of existing GPON comprises the steps:
OLT is to each ONU broadcast downstream frame, and frame length is 125 microseconds, comprises overhead area and payload section; Overhead area comprises the expense that is used to indicate each ONU upstream bandwidth and time slot position again;
Each ONU receives the downlink frame of OLT, and the upstream bandwidth position of distributing by downlink frame sends the uplink burst data bag.
The characteristics of above-mentioned transmission course are:
1) no matter be downlink frame or uplink frame, and no matter uply be which kind of speed, the frame period all is 125 microseconds;
2) all ONU must finish to receive in 125 microseconds and handle;
3) all ONU must finish the burst transmission at the T-CONT time location that is distributed in 125 microseconds;
4) required time expense during all ONU uplink bursts send and must satisfy G.984.2; For example enabling time and shutoff, to enable the time very short, is calculated as 32 bits with up 2.5G speed, about 13ns;
5) expense of described indication upstream bandwidth has only 16 bits; The expense SStart and the SStop of indication time slot position have only 16 bit widths in US BW MAP, and the maximum number of timeslots that can indicate is 65536.
Prior art is improved for above-mentioned transmission control mode, and its specific practice is:
At first, the multi-frame indication need be set in downlink frame.For example, be to be 125 microseconds in per frame period now, the length that a multi-frame can be set is 4 subframes, just 500 microsecond cycles; That is to say that be the L double-length of descending single frames described multiframe period, L is an integer.
Then, uplink frame is divided time slot by multi-frame length, distribute to T-CONT bandwidth and the time location of each ONU simultaneously by whole multi-frame length.That is to say that the uplink frame cycle equated with descending indicated multiframe period.Up map bandwidth indication utilizes multi-frame to expand; In the multi-frame (descending) comprise a plurality of up map bandwidth overhead area, the indication scope more indicated than single frames expense that combine of these expenses is a lot of greatly.
There are the following problems at least in the prior art:
1) changed transmission control mode and the frame structure that existing G.984 series standard system is stipulated.
2) owing to transmit the change of control mode and frame structure, just correspondingly need the Service Processing Module of existing OLT and ONU is done bigger change the technical scheme complexity.
Summary of the invention
In view of this, the methods, devices and systems that the one or more embodiment of the present invention provide multi-frame to handle under the situation that is implemented in the processing mode that has kept existing subframe, are merged into the multi-frame transmission that happens suddenly with subframe.Thereby the system with minimum changes, and has both reduced the difficulty that burst sends, and has also saved equipment cost.
For addressing the above problem, the embodiment of the invention provides a kind of multi-frame processing method, comprising:
Optical network unit ONU receives L subframe, and wherein L is the integer greater than 1;
Optical network unit ONU is configured to multi-frame with L the subframe that receives;
Optical network unit ONU reads bandwidth map, calculates according to transmission starting point in the described bandwidth map and transmission end point, obtains the transmission starting point of multi-frame and sends end point, sends described multi-frame to up direction.
A kind of optical line terminal OLT also is provided, has comprised:
First preset unit is used for: the bandwidth map that presets each optical network unit ONU;
Reduction unit is used to receive multi-frame, and the described multi-frame that will receive according to described bandwidth map is reduced to L subframe, and wherein, described L is the positive integer greater than 1.
A kind of optical network unit ONU also is provided, has comprised:
Dispensing unit, L the subframe that is used for receiving is configured to multi-frame, and wherein L is the integer greater than 1;
The first multi-frame transmitting element is used for: read bandwidth map, according to transmission starting point of carrying in the bandwidth map and transmission end point, calculate the transmission starting point that obtains multi-frame and send end point, send described multi-frame to up direction.
A kind of multi-frame treatment system comprises: optical line terminal OLT and optical network unit ONU,
Described optical line terminal OLT is the described device of any light terminal embodiment of the present invention;
Described optical network unit ONU is the described device of any optical network unit embodiment of the present invention.
Compared with prior art, the embodiment of the invention has the following advantages:
At first, keep the processing mode of existing subframe, do not needed to change the regulation of existing technical standard; To subframe processing module G.984 is transparent, does not also violate existing standard.This scheme can be generalized in the burst transmission of all TDM PON and the technical field that receives that happens suddenly and uses.
Secondly, utilize the merging subframe to become multi-frame, when burst sends and happen suddenly reception, the mode of employing multi-frame has increased the idle periods between frame and the frame, thereby reduced the difficulty that burst sends and burst receives, greatly relaxed performance requirement, reduced system cost ONU sudden transmitter and OLT burst receiver.
Once more, method that the present invention proposes and equipment thereof are simple and easy to realization, and is with low cost, agreed with the market demand, and application surface is wide.
Description of drawings
Shown in Figure 1, be the flow chart of the embodiment one of method of the present invention;
Shown in Figure 2, be the flow chart of the embodiment two of method of the present invention;
Shown in Figure 3, be the resume module schematic diagram of the enforcement two of method of the present invention;
Shown in Figure 4, be the downlink data structure chart of the embodiment three of method of the present invention;
Shown in Figure 5, be the upstream data structure chart of the embodiment three of method of the present invention;
Shown in Figure 6, be the schematic diagram of each data handling procedure in the handling process of upward signal;
Shown in Figure 7, be the flow chart of the embodiment three of method of the present invention;
Shown in Figure 8, be the block diagram of the embodiment one of device of the present invention;
Shown in Figure 9, be the block diagram of the embodiment one of another kind of device of the present invention;
Shown in Figure 10, be the block diagram of the embodiment one of system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is done further and to be elaborated.
At first, embodiments of the invention are formed a multi-frame (L is the positive integer greater than 1) with L uplink frame, and original 125 μ s uplink frame become a subframe in the multi-frame.Original 125 μ s downlink frame can transparent transmission.The L that becomes original frame period multiframe period doubly, the L that the multi-frame frame length becomes original frame length is doubly.Idle periods between the multi-frame also becomes L times of idle periods between original subframe.
OLT distributes bandwidth for each ONU by the subframe frame length, and OLT preserves the bandwidth map that all ONU distribute.The bandwidth map of described each ONU is used for when receiving the up multi-frame of each ONU, recovers the subframe that each ONU sent from multi-frame.
For the situation that need not change bandwidth map, only need each ONU to preserve within the L frame bandwidth summation (being used for determining the up multi-frame transmitting time point of this ONU) respectively less than all ONU of this ONU-ID every some frames.And for the situation that need change a bandwidth map every some frames, then can be referring to the concrete processing mode among the embodiment three.Between " original ONU Service Processing Module " and " original OLT Service Processing Module ", place " multi-frame processing module ".Lay the multi-frame processing module like this, thereby the benefit that realizes the multi-frame transmission has:
1, up increase in overhead reduces opening time and turn-off time to ONU burst sending module, thereby the TDM-PON system cost is reduced;
2, can continue to use existing series standard, the existence of multi-frame processing module is for original OLT Service Processing Module and conventional ONU Service Processing Module, these two module perception just can realize the multi-frame scheme less than the existence of the multi-frame processing module that increases newly so only need increase " multi-frame processing module " of the present invention on original GPON equipment;
3, do not need the GPON frame structure is done any change, only need be on the up outlet of ONU and OLT line entry increase an independence, optional module respectively, bandwidth map and packet by the buffer memory subframe, in multiframe period, again the difficulty that burst receives is reduced in the position of each ONU packet of layout.Even in multi-frame, the bandwidth of subframe changes, and still can realize.
On the basis of above-mentioned principle, represent various implementation procedure of the present invention with each embodiment of the present invention.With reference to shown in Figure 1, be the flow chart of the embodiment one of method of the present invention, comprise step:
Step 101, optical network unit ONU receive L subframe, and wherein L is the integer greater than 1, in specific implementation, can select according to actual conditions;
Step 102, optical network unit ONU are configured to multi-frame with L the subframe that receives;
Step 103, optical network unit ONU read bandwidth map, calculate according to transmission starting point in the described bandwidth map and transmission end point, obtain the transmission starting point of multi-frame and send end point; Described bandwidth map comprises the transmission starting point of all ONU sub-frame of uplink that current OLT connects and sends end point.The bandwidth map that receives each ONU can adopt various implementation of the prior art.
Step 104, optical network unit ONU send described multi-frame to up direction.
Utilize the embodiment of method of the present invention, after optical network unit ONU received L subframe, optical network unit ONU was configured to multi-frame with L the subframe that receives, and wherein L is the integer greater than 1; Optical network unit ONU reads bandwidth map, calculates according to transmission starting point in the described bandwidth map and transmission end point, obtains the transmission starting point of multi-frame and sends end point, and optical network unit ONU sends described multi-frame to up direction.Thereby realized:
At first, keep the processing mode of existing subframe, do not needed to change the regulation of existing technical standard; To subframe processing module G.984 is transparent, does not also violate existing standard.This scheme can be generalized in the burst transmission technology field of all TDM PON and uses.
Secondly, utilization merges subframe and becomes multi-frame, when burst transmission and burst reception, adopts multi-frame, thereby has reduced the difficulty of burst transmission and burst reception, has greatly relaxed the performance requirement to the ONU sudden transmitter, has reduced system cost.
Once more, method that the present invention proposes and equipment thereof are simple and easy to realization, and is with low cost, agreed with the market demand, and application surface is wide.
Wherein, in the foregoing description, can also comprise step:
According to described bandwidth map, the described multi-frame that receives is reduced to a described L subframe.
Wherein, in the foregoing description, described configuration can be specially: the payload section of a described L subframe is merged into the multi-frame payload section, the overhead area of a described L subframe is merged into the multi-frame overhead area;
Then described reduction is specially:
Described multi-frame payload section is reduced to the payload section of L subframe, described multi-frame overhead area is reduced to the overhead area of L subframe;
Again the payload section and the overhead area of described each subframe are merged into subframe.
Wherein, in the foregoing description, described configuration can also be specially: the payload section of a described L subframe is merged into the multi-frame payload section, the overhead area of a described L subframe is merged into the multi-frame overhead area;
Then described reduction is specially:
Described multi-frame payload section is reduced to the payload section of L subframe, described multi-frame overhead area is reduced to the overhead area of L subframe;
According to the transmission starting point and the transmission end point of all ONU sub-frame of uplink described in the described bandwidth map, the payload section and the described overhead area of described each subframe are merged into subframe.
Wherein, in the foregoing description, before described configuration, also comprise:
Receive a described L subframe.
Wherein, in the foregoing description, send described multi-frame according to the transmission starting point of carrying in the described bandwidth map with the transmission end point and be specially:
The subframe of carrying in described bandwidth map sends L times of time point of starting point, begins to send described multi-frame;
The subframe of carrying in described bandwidth map sends L times of time point of end point, finishes to send described multi-frame.
Wherein, in the foregoing description, send described multi-frame according to the transmission starting point of carrying in the described bandwidth map with the transmission end point and be specially:
Each ONU basis sends described multi-frame less than the bandwidth summation of all ONU of this ONU-ID after determining the multi-frame transmission starting point of this ONU and sending end point.
Wherein, in the foregoing description, 6 merge the SStart territory that forms 19bits and the SStop territory of 19bits with former SStop territory and former SStart territory respectively in the Reserved territory of described subframe is kept 7.
With reference to shown in Figure 2; it is the flow chart of the embodiment two of method of the present invention; embodiment two has provided a kind of overall process of each functional module so that multi-frame is handled that comprise; concrete functional module is seen shown in Figure 3; certainly, for the those skilled in the art, other functional module dividing mode also is feasible; also should be within protection scope of the present invention, embodiment two comprises step:
Step 201, from SNI (Service Network Interface, service network interface) downstream signal is through original OLT Service Processing Module, original OLT Service Processing Module carries out protocol processes to descending GTC (GPON Transmission Convergence, the GPON Transmission Convergence) frame (this paper is called descending sub frame) of existing standard definition;
Step 202, OLT side multi-frame processing module transparent transmission descending sub frame are preserved the bandwidth map of each subframe;
Step 203, ONU side multi-frame processing module transparent transmission descending sub frame calculate and preserve within the L subframe all the ONU bandwidth sums (Ttotal) less than this ONU-ID, and this ONU bandwidth sum (T) of being distributed within the L subframe;
Suppose in the present embodiment that 3 ONU are arranged, be respectively ONU0, ONU1, ONU2, then ONU-ID is 0,1,2; And L=4.Giving the ONU0 bandwidth that preceding L frame (promptly preceding 4 frames) distributes is 50 microseconds, and giving the ONU1 bandwidth that preceding L frame (promptly preceding 4 frames) distributes is 40 microseconds, and the bandwidth of distributing to L frame (promptly preceding 4 frames) before the ONU2 is 60 microseconds.If determine that this ONU in the present embodiment is ONU2, then Ttotal=50+40=90 microsecond, and T=60 microsecond.For the those skilled in the art, can be according to the computational methods in the present embodiment, under the ONU quantity that obtains without difficulty at other and the situation of allocated bandwidth, obtain Ttotal and the T value of this ONU.
Step 204, original ONU Service Processing Module carry out protocol processes to the descending GTC frame (this paper is called descending sub frame) of existing standard definition;
Step 205, arrive SNI through original ONT Service Processing Module, ONU side multi-frame processing module, OLT side multi-frame processing module, original OLT Service Processing Module successively from the upward signal of UNI (User Network Interface, User Network Interface).At first, original ONT Service Processing Module carries out protocol processes to the up GTC frame (this paper is called sub-frame of uplink) of existing standard definition;
Step 206, ONU side multi-frame processing module according to the Ttotal value of preserving in the step 203 add certain free time determine this ONU multi-frame send some start-up time (Sstart-at this moment between the some transmission be the payload Payload of this ONU uplink frame), determine that according to the T value this ONU multi-frame sends concluding time point (Sstop) then, the bandwidth sum that this ONU is distributed in L subframe has just obtained the T value; Carrying out data between transmission point start-up time and transmission concluding time point sends;
Same content according to embodiment cited in the step 203 is because each sub-frame of uplink all is made up of PLOu (Physical Layer Overhead upstream, upstream physical layer expense territory) and Payload two parts.So except also having certain free time value (t between each subframe before the Payload transmitting time section of bandwidth (Sstop-Sstart) indication
Free) be used to send PLOu, for example 4 subframes in the ONU0 just have 4 free time value t
Free, suppose that each value equals 5 microseconds free time, then when 4 subframes among the ONU0 were formed a multi-frame, its free time was 4*5 microsecond=20 microseconds.In like manner, the free time that ONU1 forms behind the multi-frame also is 20 microseconds, also there are 20 microseconds the free time that ONU2 forms behind the multi-frame, then start-up time is put Sstart=Ttotal+3*20 microsecond=150 microseconds in the transmission of ONU2 multi-frame, and the transmission concluding time of ONU2 multi-frame point Sstop=Sstart+T=210 microsecond.So the multi-frame of ONU2 carries out transfer of data-transmission payload Payload between 150 microseconds～210 microseconds; And send the PLOu of multi-frame at one's leisure in 20 microseconds.Find out that thus each subframe sent the time that PLOu has only 5 microseconds in the past, and after forming multi-frame, the time that sends the PLOu of multi-frame will rise to 20 microseconds.Reduced the difficulty that burst sends like this.
The bandwidth map of each subframe that step 207, OLT side multi-frame processing module have been preserved in 202 is set by step decomposed multi-frame, finally forms the subframe that original OLT Service Processing Module can be handled;
Step 208, original OLT Service Processing Module: the up GTC frame (this paper is called sub-frame of uplink) to the existing standard definition carries out protocol processes.
With reference to figure 4 and shown in Figure 5, be respectively the downlink frame among the embodiment three of method of the present invention and the structure of uplink frame, present embodiment has been described the implementation procedure in the 10G-GPON system.English lexical or textual analysis among Fig. 4 is as follows:
PCBd (Physical Control Block downstream, downlink physical controll block), Payload (payload), PSync (Physical Synchronization, the physics synchronous code), Ident (indication), PLOAMd (Physical Layer OAM Operations, Administration and Maintenance--down physical layer operation management maintain word), BIP (Bit Interleaved Parity, Bit-Interleaved Parity), Plend (Physical Length downstream, downlink physical length), US BW Map (UpstreamBandWidth Map upstream bandwidth map), FEC Ind (Forward Error Correction Indication, the forward error correction indication), Super-frame Counter (superframe counter), AllocID (distribution id field), Send PLS (Send Power Levelling sequence, the indication of transmission power level sequence), SendPLOAMu (sending up PLOAM indication), Use FEC (using the FEC indication), Send DBRu (SendDynamic Bandwidth Report upstream, up transmission dynamic bandwidth report indication), SStart (StartTime field time started field), SStop (StopTime field, the concluding time field), CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC)).
Because up frame length is 155,520bytes (when speed is 10Gb/s), as shown in Figure 4, can utilize in 7 of the reservations in Reserved territory of downlink frame 6 to merge the SStart territory that forms 19bits and the SStop territory (19bit is maximum to support 524288) of 19bits with SStop, SStart territory respectively.Thereby realized utilizing the reservation bit in Flag territory in the descending GPON frame format to expand SStart territory and SStop territory, existing time slot position indication problem when having solved GPON and being upgraded to 10G.
Adopt the multi-frame method to handle, still getting L=4 in the present embodiment describes, for downstream signal from SNI, the time started and the concluding time of the uplink data sending that the SStart of the BWMAP of OLT by descending GTC (being bandwidth map: the time started and the concluding time that comprise the uplink data sending of all ONU that this OLT hangs) and SStop specify ONU;
Minimum two bit in Super-frame Counter territory are 0 o'clock entirely in the downlink frame if original OLT Service Processing Module detects, and upgrade bandwidth map again one time, realize that per 4 subframes once change (promptly by multiframe period) words of bandwidth map.So, any one has distributed the ONU of bandwidth four subframes identical SStart time point and identical SStop time point to be arranged all in multi-frame in the corresponding upward signal, is used for multi-frame being decomposed when up; For ONU side multi-frame processing module, then only need to preserve SStart and the SStop value of this ONU-ID, so just further reduced the realization difficulty of this multi-frame processing module.
Upward signal from UNI, as shown in Figure 5, because the bandwidth map of downlink frame has guaranteed to change once by multiframe period (i.e. four subframes), so any one has distributed the ONU of bandwidth four subframes identical SStart time point and identical SStop time point to be arranged all in multi-frame in the upward signal, like this, first has guaranteed all to form a multi-frame by four subframes at every turn, and second has guaranteed t
1, t
2, t
3, t
4Time is identical.English lexical or textual analysis among Fig. 5 is as follows:
PLOu (upstream physical layer expense territory), Preamble (lead code territory), Delimiter (delimiter territory), ONU-ID (ONU ID, the ID territory of ONU), Ind (indication territory).
In the up multi-frame, ONU sends the multi-frame data of this ONU reorganization at multi-frame transmitting time point tstart (values in=4 gall nut frame SStart territories), and (Payload that is about to four subframes forms the Payload of a multi-frame, the PLOu of corresponding four subframes has formed the PLOu of a multi-frame), from the up multi-frame structure of Fig. 5 as can be seen leading (Preamble) and demarcation (Delimiter) expense the PLOu increased 4 times.
With reference to shown in Figure 6, be the schematic diagram of each data handling procedure in the handling process of upward signal; Wherein, t
i(i=0,1,2) expression ONU-ID is the transmission start-up time point (be the value in descending sub frame bandwidth map SStart territory) of ONU in subframe of i; Gap represents the interval of two ONU transmitting times; SStart represents that up multi-frame sends some start-up time.
On the basis of the disclosed content of Fig. 4-6, with reference to shown in Figure 7, be the flow chart of the enforcement three of method of the present invention, comprise step:
Step 701, ONU Service Processing Module send subframe GTC to ONU side multi-frame processing module;
Step 703, ONU side send data by the indication of the bandwidth map of preserving.Here specify descending OLT to change a bandwidth map BWMAP every four frames, then the time started SStart of the uplink data sending of 4 subframes is identical with concluding time SStop, like this, the time point that in multi-frame, sends be exactly 4*SStart and the time point that send to finish be exactly 4*SStop; For example, the time started SStart of subframe is 20 microseconds, and concluding time SStop is 40 microseconds; Then the beginning transmitting time point of the multi-frame of 4 subframe compositions is the 4*20=80 microsecond, sends the concluding time point and is the 4*40=160 microsecond.And correspondingly, the gap value between the multi-frame also is in the past 4 times.So just the time period that can in multi-frame sends each ONU be sent comes to branch.Described sub-frame of uplink sends start-up time point by four times of the SStart value of this ONU bandwidth map of preserving as up multi-frame by described multi-frame processing module by ONU side multi-frame processing module, by four times of the SStop value of this ONU bandwidth information of preserving as up multi-frame transmission concluding time point;
The multi-frame data that step 704, ONU send out through optical branching device, arrive OLT;
Step 705, OLT side multi-frame processing module are pressed the bandwidth map of ONU and are resolved multi-frame, recover to pass to the OLT Service Processing Module again after the subframe and handle according to existing standard agreement.OLT side multi-frame processing module receives the multi-frame that ONU side multi-frame processing module sends over, the data of then decomposing multi-frame become four one's share of expenses for a joint undertaking frame data, and from multi-frame PLOu, extract subframe PLOu, and form subframe by the PLOu that the SStart of the bandwidth map of the subframe of preserving and SStop add subframe with four one's share of expenses for a joint undertaking frame data and send to the former Service Processing Module of OLT.
In each embodiment of the present invention, system's conventional ONU Service Processing Module and OLT Service Processing Module all do not need to carry out any modification, still handle by original mode.
Adapting with the embodiment of aforesaid each method, with reference to shown in Figure 8, is the embodiment one of device of the present invention, and present embodiment uses mainly as OLT, comprising:
First preset unit 801 is used for: the bandwidth map that presets each optical network unit ONU;
Device embodiment of the present invention:
At first, keep the processing mode of existing subframe, do not needed to change the regulation of existing technical standard; To subframe processing module G.984 is transparent, does not also violate existing standard.This scheme can be generalized in the burst transmission of all TDM PON and the technical field that receives that happens suddenly and uses.
Secondly, utilize the merging subframe to become multi-frame, when burst receives, adopt multi-frame, thereby reduced the difficulty of burst reception, greatly relaxed performance requirement, reduced system cost the OLT burst receiver.
Once more, method that the present invention proposes and equipment thereof are simple and easy to realization, and is with low cost, agreed with the market demand, and application surface is wide.
Wherein, in the foregoing description, can also comprise: the subframe transmitting element is used for: according to described bandwidth map, send descending sub frame to optical network unit ONU, described descending sub frame carries the bandwidth map that presets.
Wherein, in the foregoing description, described reduction unit comprises:
First recovery module is used for described multi-frame payload section is reduced to the payload section of L subframe,
Second recovery module is used for described multi-frame overhead area is reduced to the overhead area of L subframe;
The merging module, the transmission starting point of each optical network unit ONU sub-frame of uplink that is used for carrying according to described bandwidth map and transmission end point are reduced to L subframe with the payload section of former each subframe and corresponding overhead area merging.
Wherein, in the foregoing description, also comprise:
Merge cells, 76 of being used for the Reserved territory of described subframe is kept merge the SStart territory that forms 19bits and the SStop territory of 19bits with former SStop territory and former SStart territory respectively.
Adapt with aforesaid each method embodiment and device embodiment, the present invention also provides the device that is mainly used in the ONU side, with reference to shown in Figure 9, is the embodiment one of multi-frame processing unit of the present invention, comprising:
The first multi-frame transmitting element 902 is used for: read bandwidth map, according to transmission starting point of carrying in the bandwidth map and transmission end point, calculate the transmission starting point that obtains multi-frame and send end point, send described multi-frame to up direction.
Device embodiment of the present invention has the following advantages:
At first, keep the processing mode of existing subframe, do not needed to change the regulation of existing technical standard; To subframe processing module G.984 is transparent, does not also violate existing standard.This scheme can be generalized in the burst transmission of all TDM PON and the technical field that receives that happens suddenly and uses.
Secondly, utilize the merging subframe to become multi-frame, when burst sends, adopt multi-frame, thereby reduced the difficulty of burst transmission, greatly relaxed performance requirement, reduced system cost the ONU sudden transmitter.
Once more, method that the present invention proposes and equipment thereof are simple and easy to realization, and is with low cost, agreed with the market demand, and application surface is wide.
The described first multi-frame transmitting element is specially:
The second multi-frame transmitting element is used for: the subframe of carrying in described bandwidth map sends L times of time point of starting point, begins to send described multi-frame; The subframe of carrying in described bandwidth map sends L times of time point of end point, finishes to send described multi-frame.
Wherein, in the foregoing description, described dispensing unit comprises:
First configuration module is used for the payload section of a described L subframe is merged into the multi-frame payload section;
Second configuration module is used for the overhead area of a described L subframe is merged into the multi-frame overhead area.
With reference to shown in Figure 10, adapt with aforesaid each method embodiment and device embodiment, the present invention also provides the embodiment one of multi-frame treatment system, comprising: OLT1001 and ONU1002,
Described OLT is any device (being embodiment illustrated in fig. 8 and preferred embodiment) that uses as OLT in the embodiment of the invention;
Described ONU is any device (being embodiment illustrated in fig. 9 and preferred embodiment) that uses as ONU in the embodiment of the invention.
System of the present invention has the technique effect that adapts with method of the present invention, no longer repeats.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1, a kind of multi-frame processing method is characterized in that, comprising:
Optical network unit ONU receives L subframe, and wherein L is the integer greater than 1;
Optical network unit ONU is configured to multi-frame with L the subframe that receives;
Optical network unit ONU reads bandwidth map, calculates according to transmission starting point in the described bandwidth map and transmission end point, obtains the transmission starting point of multi-frame and sends end point, sends described multi-frame to up direction.
2, the method for claim 1 is characterized in that, described configuration is specially:
The payload section of a described L subframe is merged into the multi-frame payload section, the overhead area of a described L subframe is merged into the multi-frame overhead area, form multi-frame.
3, method as claimed in claim 1 or 2 is characterized in that, also comprises:
Optical line terminal OLT receives described multi-frame;
Optical line terminal OLT is reduced to a described L subframe according to described bandwidth map with the described multi-frame that receives.
4, method as claimed in claim 3 is characterized in that, described reduction is specially:
Described multi-frame payload section is reduced to the payload section of L subframe, described multi-frame overhead area is reduced to the overhead area of L subframe;
The payload section of former each subframe and corresponding overhead area merging are reduced to L subframe.
5, method as claimed in claim 3 is characterized in that, described reduction is specially:
Described multi-frame payload section is reduced to the payload section of L subframe, described multi-frame overhead area is reduced to the overhead area of L subframe;
Transmission starting point and transmission end point according to the sub-frame of uplink of optical network unit ONU described in the bandwidth map merge the payload section of former each subframe and corresponding overhead area, are reduced to L subframe.
6, the method for claim 1 is characterized in that, and is described according to the transmission starting point in the described bandwidth map with send end point and calculate, and obtains the transmission starting point of multi-frame and send end point to be specially:
The subframe of carrying in described bandwidth map sends L times of time point of starting point, begins to send described multi-frame;
The subframe of carrying in described bandwidth map sends L times of time point of end point, finishes to send described multi-frame.
7, the method for claim 1 is characterized in that, and is described according to the transmission starting point in the described bandwidth map with send end point and calculate, and obtains the transmission starting point of multi-frame and send end point to be specially:
Each optical network unit ONU according within the L frame less than the bandwidth summation of all optical network unit ONU of this ONU-ID, calculate and send described multi-frame after the multi-frame that obtains this optical network unit ONU sends starting point and sends end point.
8, the method for claim 1, it is characterized in that in the reservation Reserved territory of each described subframe is kept 76 merge the time started field SStart territory that forms 19bits and the concluding time field SStop territory of 19bits with former time started field SStart territory and former concluding time field SStop territory respectively.
9, a kind of optical line terminal OLT is characterized in that, comprising:
First preset unit is used for: the bandwidth map that presets each optical network unit ONU;
Reduction unit is used to receive multi-frame, and the described multi-frame that will receive according to described bandwidth map is reduced to L subframe, and wherein, described L is the positive integer greater than 1.
10, device as claimed in claim 9 is characterized in that, also comprises: the subframe transmitting element is used for: according to described bandwidth map, send descending sub frame to optical network unit ONU, described descending sub frame carries the bandwidth map that presets.
11, device as claimed in claim 9 is characterized in that, described reduction unit comprises:
First recovery module is used for described multi-frame payload section is reduced to the payload section of L subframe,
Second recovery module is used for described multi-frame overhead area is reduced to the overhead area of L subframe;
The merging module, the transmission starting point of each optical network unit ONU sub-frame of uplink that is used for carrying according to described bandwidth map and transmission end point are reduced to L subframe with the payload section of former each subframe and corresponding overhead area merging.
12, device as claimed in claim 9 is characterized in that, also comprises:
Merge cells, 6 of 7 of being used for the reservation Reserved territory of each described subframe is kept merge the time started field SStart territory that forms 19bits and the concluding time field SStop territory of 19bits with former time started field SStart territory and former concluding time field SStop territory respectively.
13, a kind of optical network unit ONU is characterized in that, comprising:
Dispensing unit, L the subframe that is used for receiving is configured to multi-frame, and wherein L is the integer greater than 1;
The first multi-frame transmitting element is used for: read bandwidth map, according to transmission starting point of carrying in the bandwidth map and transmission end point, calculate the transmission starting point that obtains multi-frame and send end point, send described multi-frame to up direction.
14, device as claimed in claim 13 is characterized in that, the described first multi-frame transmitting element is specially:
The second multi-frame transmitting element is used for: the subframe of carrying in described bandwidth map sends L times of time point of starting point, begins to send described multi-frame; The subframe of carrying in described bandwidth map sends L times of time point of end point, finishes to send described multi-frame.
15, device as claimed in claim 13 is characterized in that, described dispensing unit comprises:
First configuration module is used for the payload section of a described L subframe is merged into the multi-frame payload section;
Second configuration module is used for the overhead area of a described L subframe is merged into the multi-frame overhead area.
16 1 kinds of multi-frame treatment systems is characterized in that, comprising: optical line terminal OLT and optical network unit ONU,
Described optical line terminal OLT is each described device of claim 9-12;
Described optical network unit ONU is each described device of claim 13-15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810096790 CN101577843B (en) | 2008-05-08 | 2008-05-08 | Method, device and system for processing multiframe |
| PCT/CN2009/071436 WO2009135415A1 (en) | 2008-05-08 | 2009-04-24 | Method, equipment and system for processing multiframe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810096790 CN101577843B (en) | 2008-05-08 | 2008-05-08 | Method, device and system for processing multiframe |
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| CN101577843A true CN101577843A (en) | 2009-11-11 |
| CN101577843B CN101577843B (en) | 2012-10-03 |
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| CN 200810096790 Expired - Fee Related CN101577843B (en) | 2008-05-08 | 2008-05-08 | Method, device and system for processing multiframe |
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| WO (1) | WO2009135415A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075825A (en) * | 2011-01-27 | 2011-05-25 | 华为技术有限公司 | Uplink bandwidth management method and device in optical communication system |
| CN105792030A (en) * | 2014-12-24 | 2016-07-20 | 中兴通讯股份有限公司 | Service span-ring realization method of optical burst transport network and corresponding master nodes |
| CN108605040A (en) * | 2016-02-09 | 2018-09-28 | 三菱电机株式会社 | Communication device and frame sending method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003007518A2 (en) * | 2001-07-10 | 2003-01-23 | Salira Optical Network Systems, Inc | Allocation of upstream bandwidth in an ethernet passive optical network |
| CN100596043C (en) * | 2004-08-26 | 2010-03-24 | 华为技术有限公司 | Method and apparatus for realizing low-speed signal transparent transmission in optical transmission network |
| CN101136703B (en) * | 2006-09-01 | 2011-04-20 | 华为技术有限公司 | Data transmission method, system and device |
-
2008
- 2008-05-08 CN CN 200810096790 patent/CN101577843B/en not_active Expired - Fee Related
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2009
- 2009-04-24 WO PCT/CN2009/071436 patent/WO2009135415A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075825A (en) * | 2011-01-27 | 2011-05-25 | 华为技术有限公司 | Uplink bandwidth management method and device in optical communication system |
| CN105792030A (en) * | 2014-12-24 | 2016-07-20 | 中兴通讯股份有限公司 | Service span-ring realization method of optical burst transport network and corresponding master nodes |
| CN108605040A (en) * | 2016-02-09 | 2018-09-28 | 三菱电机株式会社 | Communication device and frame sending method |
| CN108605040B (en) * | 2016-02-09 | 2019-11-26 | 三菱电机株式会社 | Communication device and frame sending method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009135415A1 (en) | 2009-11-12 |
| CN101577843B (en) | 2012-10-03 |
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