CN106303766A

CN106303766A - The method and device of Bandwidth adjustment

Info

Publication number: CN106303766A
Application number: CN201510297302.4A
Authority: CN
Inventors: 苏伟; 马腾·维塞斯; 肖新
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-06-03
Filing date: 2015-06-03
Publication date: 2017-01-04
Anticipated expiration: 2035-06-03
Also published as: CN106303766B; WO2016192480A1

Abstract

The invention discloses a kind of bandwidth adjusting method, relate to technical field of photo communication, described method is applied in optical transport network, and described method includes: obtain the bandwidth of current business to be transmitted；If the described bandwidth of current business to be transmitted and the current bandwidth of described transmission unit exist bandwidth difference, then determine quantity n of logic tributary signal to be adjusted according to described bandwidth difference；According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine quantity m of light tributary signal to be adjusted；Quantity n and quantity m of described light tributary signal to be adjusted according to the logic tributary signal described to be adjusted determined adjust current light subcarrier, current light tributary signal and the quantity of logic tributary signal.

Description

The method and device of Bandwidth adjustment

Technical field

The present invention relates to technical field of photo communication, particularly relate to the method and device of a kind of Bandwidth adjustment.

Background technology

Optical transport network (English: Optical transport network, it is called for short: OTN) as next In generation, transmits the core technology of net, is based on wavelength-division multiplex technique, at the transmission net of light layer tissue network. OTN includes the technical specification of electric layer and photosphere, uses optical fiber as transmission medium, it is possible to realize Large Copacity The transmission of business, thus be widely used in Metropolitan Area Network (MAN) (English: Metropolitan Area Network, It is called for short: in MAN).OTN in Metropolitan Area Network (MAN), as it is shown in figure 1, include multiple network equipment (English: Network equipment, is called for short NE) and switch, between heterogeneous networks equipment, the network equipment And the transmission of signal is carried out between switch by optical fiber.

Wherein, signal, is specifically included to the transmitting procedure of receiving device by sending ending equipment: send End equipment is (English: Optical by packing bearing to optical channel transmission unit by business to be transmitted Transport Unit-k order, is called for short: OTUk), then transmit to photonic integrated circuits (English: Photonics Integeration Circuit, is called for short PIC) carry out opto-electronic conversion after form multiple light and prop up Road signal, multiple smooth tributary signals form light tributary signal group, then light tributary signal group is included Each light tributary signal by after photon carriers carry by fiber-optic transfer to receiving device.With transmitting terminal Relatively, first by PIC, light tributary signal is carried out photoelectricity inverse conversion after receiving terminal receives light tributary signal After carried by OTU and parse business to be transmitted.Wherein, in OTUk, the value of k can be 1,2, 3,4, corresponding transmission bandwidth be respectively 2.5Gbits/s, 10Gbits/s, 40Gbits/s and 100Gbits/s.The optical channel transmission unit choosing which kind of bandwidth is determined by the bandwidth of Ethernet interface, The total bandwidth of the light subcarrier chosen to match with the bandwidth of Ethernet interface.As Fig. 2-a gives When the signal of telecommunication that Ethernet interface is n road 40Gbit/s, corresponding optical channel transmission unit is n The OTU3 of 40Gbit/s, and transmit light tributary signal by the light subcarrier of 4n 10Gbit/s；Such as figure 2-b gives as Ethernet interface band a width of n road 100Gbit/s, and corresponding optical channel transmission unit is n The OTU4 of individual 100Gbit/s, and transmit light tributary signal by the light subcarrier of 4n 25Gbit/s.

The existing this bandwidth according to Ethernet interface determines the method for the optical channel transmission unit of employing, Once the bandwidth of Ethernet interface determines, then the bandwidth of the optical channel transmission unit used is the most true Fixed.So, when the bandwidth of data to be transmitted is less than the bandwidth of Ethernet interface, optical channel is easily caused Transmission unit bandwidth and the waste of light subcarrier, when the band of actual data to be transmitted is wider than Ethernet interface Transmission bandwidth time, existing this optical channel transmission unit and light subcarrier cannot carry data to be transmitted.

Summary of the invention

The present invention provides the method and device of a kind of Bandwidth adjustment, in order to solve of the prior art due to The bandwidth of optical channel transmission unit is determined by the bandwidth of Ethernet interface, and the bandwidth waste brought or nothing The problem that method effectively carries data to be transmitted.

For reaching above-mentioned purpose, the present invention adopts the following technical scheme that

First aspect, the invention provides a kind of bandwidth adjusting method, and described method is applied to light transmission In network, the transmission unit in described optical transport network includes at least one tunnel logic tributary signal, described The quantity of logic tributary signal is adjustable, and the bandwidth of logic tributary signal described in every road is equal and be default Value, the bandwidth of described transmission unit is equal to the bandwidth sum of all described logic tributary signals, described light The light tributary signal group transmitted in network includes at least one road light tributary signal, described smooth tributary signal Quantity is adjustable, and described method includes:

Obtain the bandwidth of current business to be transmitted；

If there is band with the current bandwidth of described transmission unit in the bandwidth of described current business to be transmitted Wide poor, then quantity n of logic tributary signal to be adjusted is determined according to described bandwidth difference；

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be adjusted Quantity m of light tributary signal；

Quantity n and described light to be adjusted according to the logic tributary signal described to be adjusted determined prop up Quantity m of road signal adjusts current light subcarrier, current light tributary signal and the number of logic tributary signal Amount.

In conjunction with first aspect, in the first implementation of first aspect, if described currently Bandwidth difference is there is, then according to described band in the bandwidth of business to be transmitted with the current bandwidth of described transmission unit Wide difference determines quantity n of logic tributary signal to be adjusted, specifically includes:

If the band of described current business to be transmitted is wider than the current bandwidth of described transmission unit, then root Quantity n of logic tributary signal to be increased is determined according to described bandwidth difference；

Then, according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine and wait to adjust Quantity m of whole light tributary signal, specifically includes:

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be increased Quantity m of light tributary signal；

Then, according to quantity n of the logic tributary signal described to be adjusted determined and described to be adjusted Quantity m of light tributary signal adjusts current light subcarrier, current light tributary signal and logic tributary signal Quantity, specifically include:

Activate m light subcarrier and generate m the light branch road letter corresponding with described m light subcarrier Number；

Described m light tributary signal is increased in described smooth tributary signal group and change described light and props up The expense of road signal group；

Activate n road logic tributary signal and described n road logic tributary signal is increased to described transmission list In unit.

In conjunction with first aspect, in the second implementation of first aspect, if described currently Bandwidth difference is there is, then according to described band in the bandwidth of business to be transmitted with the current bandwidth of described transmission unit Wide difference determines the quantity of logic tributary signal to be adjusted, specifically includes:

If described current service bandwidth to be transmitted is less than the current bandwidth of described transmission unit and described Bandwidth difference more than the bandwidth of single channel logic tributary signal, then determines to be deleted patrolling according to described bandwidth difference Collect quantity n of tributary signal；

Then, according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine and wait to adjust The quantity of whole light tributary signal, specifically includes:

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be deleted Quantity m of light tributary signal；

Described n road logic tributary signal is deleted from described transmission unit；

By m light tributary signal corresponding to the logic tributary signal of described n road from light tributary signal group Middle deletion also updates the expense of described smooth tributary signal group；

Close m light subcarrier corresponding to described m light tributary signal.

In conjunction with in the first implementation of first aspect or first aspect, the second implementation Any one implementation, in the third implementation of first aspect,

The frame structure of described transmission unit includes that overhead area and payload section, described overhead area include every road institute State the overhead area of logic tributary signal；Described payload section includes the payload of logic tributary signal described in every road District；

The time slot division methods of the payload section of described transmission unit specifically includes:

Bandwidth according to single channel logic tributary signal and the pre-set bandwidths of single time slot, determine single channel logic The number of time slot included in tributary signal；

Number according to logic tributary signal included in described transmission unit determines that described transmission is single Total number of time slot included in unit；

Time slot division is carried out according to default byte, and by different described logic tributary signals according to described Default byte interleaver successively.

In conjunction with first aspect, in the 4th kind of implementation of first aspect,

Described current business to be transmitted is for including described optical channel data transmission unit business and flexible light The mixed service of at least two-way of tunnel data transport unit business；Or

Described current business to be transmitted is the flexible optical channel data of the ether business of carrying 25Gbit/s Unit business.

In conjunction with first aspect, in the 5th kind of implementation of first aspect, described transmission unit includes At least one in optical channel Payload Unit, Optical Channel Data Unit-k and optical channel transmission unit.

Second aspect, present invention also offers a kind of Bandwidth adjustment device, and described device is applied to light and passes In SCN Space Cable Network, the transmission unit in described optical transport network includes at least one tunnel logic tributary signal, institute The quantity stating logic tributary signal is adjustable, and the bandwidth of logic tributary signal described in every road is equal and be default Value, the bandwidth of described transmission unit is equal to the bandwidth sum of all described logic tributary signals, described light The light tributary signal group transmitted in network includes at least one road light tributary signal, described smooth tributary signal Quantity is adjustable, and described device includes:

Acquisition module, for obtaining the bandwidth of current business to be transmitted；

Processing module, for the bandwidth of described current business to be transmitted that obtains when described acquisition module with When the current bandwidth of described transmission unit exists bandwidth difference, determine to be adjusted patrolling according to described bandwidth difference Collect quantity n of tributary signal；

Adjusting module, for the logic tributary signal described to be adjusted determined according to described processing module Quantity n and quantity m of described light tributary signal to be adjusted adjust current light subcarrier, current Light tributary signal and the quantity of logic tributary signal.

In conjunction with second aspect, in the first implementation of second aspect, described processing module, tool Body is used for:

When the band of described current business to be transmitted is wider than the current bandwidth of described transmission unit, according to Described bandwidth difference determines quantity n of logic tributary signal to be increased；

Described adjusting module, specifically for:

In conjunction with second aspect, in the second implementation of second aspect, described processing module, tool Body is additionally operable to:

When described current service bandwidth to be transmitted is less than the current bandwidth of described transmission unit and described band When wide difference is more than the bandwidth of single channel logic tributary signal, determine logic to be deleted according to described bandwidth difference Quantity n of tributary signal；

Described adjusting module, is specifically additionally operable to:

Close m light subcarrier corresponding to described m light tributary signal.

In conjunction with appointing in second aspect, the first implementation of second aspect, the second implementation A kind of implementation of meaning, in the third implementation of second aspect,

The frame structure of described transmission unit includes overhead area and payload section, and described overhead area is by described in every road The overhead area of logic tributary signal is formed according to default byte successively interleaver；Described payload section is by often The payload section of logic tributary signal described in road is formed according to described default byte interleaver successively；

Described device also includes that time slot divides module, is used for:

Time slot division is carried out according to described default byte.

In conjunction with second aspect, in the 4th kind of implementation of second aspect,

The described current business to be transmitted that described acquisition module obtains is for including that described optical channel data pass The mixed service of at least two-way of defeated unit business and flexible optical channel data transmission unit business；Or

The method and apparatus of the Bandwidth adjustment that the present invention provides, changes corresponding according to the bandwidth of current business Adjustment logic tributary signal, light tributary signal and the quantity of light subcarrier so that adjust optical transport network Bandwidth to provide suitable bandwidth for transmission current business, with the band in optical transport network in prior art Wide determination by the bandwidth of Ethernet interface and non-adjustable compare, the bandwidth of the optical transport network in the present invention For adjustable, it is thus possible to avoid because business to be transmitted is not mated with the current bandwidth of optical transport network And the bandwidth waste brought or the problem that cannot effectively transmit, it is achieved effective transmission of data.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, Accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art From the point of view of, on the premise of not paying creative work, it is also possible to obtain the attached of other according to these accompanying drawings Figure.

Fig. 1 is the structural representation of OTN network；

Fig. 2-a and Fig. 2-b is the transmitting terminal network equipment and reception in OTN network of the prior art The structural representation that the end network equipment carries out data transmission；

The schematic flow sheet of the method for a kind of Bandwidth adjustment that Fig. 3 provides for the embodiment of the present invention；

The flow process signal of the method for Bandwidth adjustment when Fig. 4 increases for the bandwidth that the embodiment of the present invention provides Figure；

The bandwidth that Fig. 5 provides for the embodiment of the present invention increases a kind of specific implementation that Time Bandwidth adjusts Schematic flow sheet；

The flow process signal of the method for Bandwidth adjustment when Fig. 6 reduces for the bandwidth that the embodiment of the present invention provides Figure；

The one side of implementing of Bandwidth adjustment when Fig. 7 reduces for the bandwidth that the embodiment of the present invention provides The schematic flow sheet of formula；

The stream of the method that the time slot of the payload section of the transmission unit that Fig. 8 provides for the embodiment of the present invention divides Journey schematic diagram；

The frame structure schematic diagram of the OTU comprising FEC that Fig. 9 provides for the embodiment of the present invention；

The schematic diagram of the frame structure of the OTU not comprising FEC that Figure 10 provides for the embodiment of the present invention；

The payload section of single channel OTULL that Figure 11-1 provides for the embodiment of the present invention is made with M=16 byte Interleave granularity for its time slot, divide using 20 frames as the time slot of an OPU payload section dividing the cycle Schematic diagram；

The n road OTULL that Figure 11-2 provides for the embodiment of the present invention is according to M=16 byte intertexture division multiplexing The schematic diagram of the OPU payload section of the frame structure of the OTU formed；

The frame structure of the transmission unit of the employing embodiment of the present invention that Figure 12 provides for the embodiment of the present invention The schematic flow sheet of the method for carrying mixed service；

The frame structure of the transmission unit of the employing embodiment of the present invention that Figure 13 provides for the embodiment of the present invention The schematic flow sheet of the method for the special business of carrying；

The structural representation of the device of a kind of Bandwidth adjustment that Figure 14 provides for the embodiment of the present invention；

The structural representation of the device of the another kind of Bandwidth adjustment that Figure 15 provides for the embodiment of the present invention；

The structural representation of the device of another Bandwidth adjustment that Figure 16 provides for the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the present embodiment, the technical scheme in the present embodiment is carried out clear, Be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making The every other embodiment obtained under creative work premise, broadly falls into the scope of protection of the invention.

Embodiments providing a kind of bandwidth adjusting method, described method is applied to optical transport network In.Wherein, the network architecture of this optical transport network is as shown in Figure 1.

The transmission unit in described optical transport network in the embodiment of the present invention includes at least one tunnel logic Tributary signal, the quantity of described logic tributary signal is adjustable, the bandwidth of logic tributary signal described in every road Equal and be preset value, the bandwidth of described transmission unit is equal to the bandwidth of all described logic tributary signals Sum, the light tributary signal group in described optical transport network includes at least one road light tributary signal, described The quantity of light tributary signal is adjustable.

Wherein, logic branch road, as a part for described transmission unit, is used for carrying low order/high-order ODU Business or encapsulate the ODUflex special project business of ether business for carrying；Transmission unit can afterwards It is split as n road logic tributary signal；Light branch road is for carrying the logic tributary signal of correspondence and carrying phase Answer photosphere monitoring management expense；Form optical signal by opto-electronic conversion afterwards and modulate corresponding photon load Ripple, is transmitted by optical fiber.

Wherein, the bandwidth of single channel logic tributary signal can be 40Gbit/s, 10Gbit/s, 12.5Gbit/s, 25Gbit/s, 50Gbit/s, 100Gbit/s etc..

It should be noted that the bandwidth value that the embodiment of the present invention provides is a general bandwidth class value, Do not represent concrete exact value.

The bandwidth of single channel logic tributary signal can set according to the following aspects:

First aspect, owing in the embodiment of the present invention being the number by adjusting single channel logic tributary signal Adjust the bandwidth of transmission unit, thus the bandwidth variable quantity every time adjusted is single channel logic tributary signal The integral multiple of bandwidth.Then the bandwidth of single channel logic tributary signal is the least, and the scope of BREATHABLE BANDWIDTH amount is more Greatly.

Second aspect, due to bandwidth and all smooth tributary signal groups of the transmission unit in optical transport network The total bandwidth of light tributary signal group become to keep consistent, and transmission unit and the band of light tributary signal group Width is all the product of the number of the bandwidth of the single channel tributary signal included inside it and tributary signal, thus The integral multiple of the general bandwidth that the bandwidth of single channel logic tributary signal is set as single channel light tributary signal, So the quantity of logic tributary signal in adjusting transmission unit, adjusts the light of the certain multiple of this quantity Tributary signal.Certainly, this integral multiple can be 1, such as: the bandwidth one of light tributary signal As be set as 10Gbit/s or 25Gbit/s, then the bandwidth of corresponding logic tributary signal is also set to 10Gbit/s or 25Gbit/s, so needs logic tributary signal and the quantity of light tributary signal adjusted Identical.

The third aspect, it is contemplated that the feasibility of current 25Gbit/s technology and low cost, IEEE802.3 is stepping up to formulate 25Gbit/s interface.Along with the marketization of 25Gbit/s business is general And, follow-up 25Gbit/s, 50Gbit/s bandwidth may be evolved to MAN primary interface form, Thus a kind of implementation of the bandwidth of single channel logic tributary signal is 25Gbit/s.

When the bandwidth of actual set single channel logic tributary signal, the above can be considered, it is possible to The most only to consider one of them or several aspect or other aspects.

The number of the logic tributary signal comprised in transmission unit can be according to transmission when initial setting up The maximum of estimating of business sets.

Additionally, in the embodiment of the present invention transmission unit of indication include optical channel Payload Unit (English: Optical Channel Payload Unit, is called for short OPU), Optical Channel Data Unit-k (English: Optical Channel Data Unit, be called for short: ODU) and optical channel transmission unit (English: Optical Channel Transport Unit, be called for short OTU) at least one, these three transmission unit is equal For the necessary transmission unit in OTN, broadly, OPU, ODU, OTU have certain level Relation, is first business to be transmitted to be mapped into OPU payload section and adds mapping cost, forms OPU Frame；OPU frame adds ODU expense (wherein, ODU expense monitors for end-to-end path), Form ODU frame；ODU frame adds OTU expense and forward error correction is (English: Forward Error Correction, is called for short: FEC) (wherein, OTU expense is used for point-to-point to check information Link monitoring), form OTU frame, then send described business to be transmitted, thus OPU, ODU It is relation one to one with OTU three.Accordingly, corresponding for OPU logic branch road can be referred to as Optical channel payload logic branch road (it is English: Optical Channel Payload Unit Logic Lane, It is called for short: OPULL), logic branch road corresponding for ODU can be referred to as optical channel mathematical logic branch road (English Literary composition: Optical Channel Data Unit Logic Lane, is called for short: ODULL), OTU pair It is (English: Optical Channel that the logic branch road answered can be referred to as optical channel transmission logic branch road Transport Unit Logic Lane, is called for short: OTULL).

Additionally, the embodiment of the present invention gives patrolling of a kind of different bandwidth for single channel logic branch road Collect the naming method of branch road, as a width of 10Gbit/s of band of single channel logic branch road, single channel logic branch road OPUX, ODUX, OTUX can be respectively designated as, accordingly by the single channel of n road 10Gbit/s The transmission unit of logic branch road composition can be respectively designated as OPUXn, ODUXn, OTUXn；When During a width of 25Gbit/s of band of single channel logic branch road, single channel logic branch road can be respectively designated as OPUXXV, ODUXXV, OTUXXV, propped up by the single channel logic of n road 25Gbit/s accordingly The transmission unit of road composition can be respectively designated as OPUXXVn, ODUXXVn, OTUXXVn； As a width of 40Gbit/s of band of single channel logic branch road, single channel logic branch road can be respectively designated as OPUXL, ODUXL, OTUXL, accordingly by the single channel logic branch road group of n road 40Gbit/s The transmission unit become can be respectively designated as OPUXLn, ODUXLn, OTUXLn；When single channel is patrolled During a width of 50Gbit/s of band of volume branch road, single channel logic branch road can be respectively designated as OPUL, ODUL, OTUL, the transmission unit being made up of the single channel logic branch road of n road 50Gbit/s accordingly OPULn, ODULn, OTULn can be respectively designated as；When the band of single channel logic branch road is a width of During 100Gbit/s, single channel logic branch road can be respectively designated as OPUC, ODUC, OTUC, The corresponding transmission unit being made up of the single channel logic branch road of n road 100Gbit/s can be respectively designated as OPUCn、ODUCn、OTUCn；Wherein, X, XXV, XL, L, C are Roman character, Represent the meaning of 10,25,40,50,100 respectively.

On the basis of the above-mentioned transmission unit that the embodiment of the present invention provides, as it is shown on figure 3, described side Method includes:

101: obtain the bandwidth of current business to be transmitted.

102: if the described bandwidth of current business to be transmitted is deposited with the current bandwidth of described transmission unit In bandwidth difference, then determine quantity n of logic tributary signal to be adjusted according to described bandwidth difference.

The bandwidth of the transmission unit after being adjusted by this step is needed more than or equal to current industry to be transmitted The bandwidth of business is to ensure effective carrying of business to be transmitted.

Such as: transmission unit is currently included the logic tributary signal of 10 road 25Gbit/s, Ye Jichuan The current total bandwidth of defeated unit is 250Gbit/s, if when the band of business to be transmitted is a width of 100Gbit/s, then bandwidth decrement is 150Gbit/s, the number of logic tributary signal the most to be deleted Amount is 6；If a width of 120Gbit/s of the band of business to be transmitted, then bandwidth decrement is 130Gbit/s, The quantity of logic tributary signal the most to be deleted is 5 tunnels；If the band a width of 320 when business to be transmitted Gbit/s, then bandwidth increment is 70Gbit/s, and the quantity of logic tributary signal the most to be increased is 3 Road.

103: according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine and treat Quantity m of the light tributary signal adjusted.

Owing to the total bandwidth of transmission unit needs to keep consistent with the total bandwidth of light tributary signal group, thus After determining the amount of bandwidth that transmission unit needs adjust, in addition it is also necessary to determine smooth tributary signal to be adjusted Quantity.

Can right according between the bandwidth of the bandwidth of single channel logic tributary signal and single channel light tributary signal Should be related to, obtain quantity corresponding relation therebetween, such as: the bandwidth of single channel logic tributary signal For 40Gbit/s, during a width of 10Gbit/s of band of single channel light tributary signal, adjust 1 tunnel logic branch road letter Number needs adjust 4 road light tributary signals accordingly.

Certainly, in a kind of implementation of this step, the bandwidth of single channel logic tributary signal and single channel The bandwidth of light tributary signal is equal, then the quantitative relation of the two is 1:1, and this implementation is adjusting Shi Shixian is simpler.

104: according to quantity n of the logic tributary signal described to be adjusted determined and described to be adjusted Light tributary signal quantity m adjust current light subcarrier, current light tributary signal and logic branch road letter Number quantity.

Wherein, each smooth subcarrier is for carrying one road light tributary signal, thus photon to be adjusted carries The quantity of ripple is identical with the quantity of light tributary signal to be adjusted, is m.By closing or can activate Light subcarrier adjusts the quantity of light subcarrier, is adjusted light propped up by generation or deletion light tributary signal The quantity of road signal, adjusts logic tributary signal by the quantity generating or deleting logic tributary signal Quantity.

The method of the Bandwidth adjustment that the embodiment of the present invention provides, changes corresponding according to the bandwidth of current business Adjustment logic tributary signal, light tributary signal and the quantity of light subcarrier so that adjust optical transport network Bandwidth to provide suitable bandwidth for transmission current business, with the band in optical transport network in prior art Wide determination by the bandwidth of Ethernet interface and non-adjustable compare, the bandwidth of the optical transport network in the present invention For adjustable, it is thus possible to avoid because business to be transmitted is not mated with the current bandwidth of optical transport network And the bandwidth waste brought or the problem that cannot effectively transmit, it is achieved effective transmission of business.

As a kind of specific implementation of method shown in Fig. 3, the band of current business to be transmitted is wider than During current bandwidth, the most as shown in Figure 4, if the bandwidth of described current business to be transmitted is with described There is bandwidth difference in the current bandwidth of transmission unit, then determines that logic to be adjusted is propped up according to described bandwidth difference Quantity n of road signal, specifically includes:

201: if the band of described current business to be transmitted is wider than the current bandwidth of described transmission unit, Quantity n of logic tributary signal to be increased is then determined according to described bandwidth difference.

202: according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine and treat Quantity m of the light tributary signal increased.

203: activate m light subcarrier and generate m the light corresponding with described m light subcarrier Tributary signal.

204: described m light tributary signal increased in described smooth tributary signal group and change described The expense of light tributary signal group.

Wherein, the expense of light tributary signal group is (English: Optical Tributary Signal Group Overhead, is called for short OTSiGO) for indicating total of OTS included by current OTSiG Number, and the mid frequency of each OTSi, spectrum width, modulation format equiwavelength's information.Additionally, This OTSiG-O can pass through out-of-band delivery, such as by special expense wavelength transmission.

205: activate n road logic tributary signal and described n road logic tributary signal increased to described In transmission unit.

Due to the one-to-one relationship of ODU, OPU and OTU, so that synchronization generation n road, OPULL, ODULL and OTULL also increase in current OPU, ODU or OTU.

As it was previously stated, the method for the Bandwidth adjustment of embodiment of the present invention offer is mainly used in OTN net During in network, any two network equipment communicates, thus for current business to be transmitted, send out Sending end equipment and receiving device are required to carry out Bandwidth adjustment.In order to above-mentioned steps 203 to step 205 carry out clearer explanation, using the network equipment 1 and the network equipment 2 as needing Bandwidth adjustment Two network equipments, the embodiment of the present invention additionally provides adjustment light subcarrier, light tributary signal and logic Tributary signal implement process, as it is shown in figure 5, include:

301: activate m light subcarrier and generate m the light corresponding with described m light subcarrier Tributary signal, joins m light tributary signal of generation in light tributary signal group.

302: synchronize to activate n road OPULL, ODULL and OTULL.

303: described n road, OPULL, ODULL and OTULL that lossless increase activates arrive respectively OPU, ODU and OTU.During implementing, this step also comprises the steps 3031 To step 3034.

3031: the network equipment 1 and the network equipment 2 initiate to increase the increase of n road logic branch road respectively Request.

Wherein, this increase request carries the number of the logic branch road of request type and request increase, Such as, when request increases n OPULL, this request carries [Req_Add, OPULLn] Indicate.

3032: when receive opposite end accordingly increase request after, send to opposite end this increase request should Answer response.

Such as: this response carries [ACK, OPULLn] and indicates.

3033: when, after the response that this increase receiving opposite end is asked, initiation is increased and implements by local terminal Instruction, for representing that this end will send after instruction is implemented in this increase in the corresponding n road logic increased Branch road carries business.

Such as: [do_Add, OPULLn] is carried in this enforcement instruction request and indicates.

3034: when receive opposite end accordingly increase enforcement instruction after, local terminal from increase corresponding n Road logic branch road extracts business；Send this increase simultaneously to opposite end and implement the response of instruction.

Such as: this response carries [ACK, OPULLn] and indicates.

When after the response increasing enforcement instruction receiving opposite end, represent that the n road logic of this increase is propped up The most lossless increasing enters in transmission unit on road, realizes the lossless carrying of business simultaneously.

It should be noted that after generating n road OPULL, ODULL and OTULL, increase to The order of corresponding transmission unit is for first to increase in OTU by n road OTULL, then the n by correspondence Road ODULL increases in ODU, is increased in OPU by the most corresponding n road OPULL.

As a kind of specific implementation of method shown in Fig. 3, the bandwidth of current business to be transmitted is less than During current bandwidth, the most as shown in Figure 6, if the bandwidth of described current business to be transmitted is with described There is bandwidth difference in the current bandwidth of transmission unit, then determines that logic to be adjusted is propped up according to described bandwidth difference The quantity of road signal, specifically includes:

401: if described current service bandwidth to be transmitted less than described transmission unit current bandwidth and Described bandwidth difference more than the bandwidth of single channel logic tributary signal, then determines to be deleted according to described bandwidth difference Quantity n of logic tributary signal.

402: according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine and treat Quantity m of the light tributary signal deleted.

403: from described transmission unit, delete described n road logic tributary signal.

404: m light tributary signal corresponding to the logic tributary signal of described n road is believed from light branch road Number group deletes and updates the expense of described smooth tributary signal group.

405: close m light subcarrier corresponding to described m light tributary signal.

In order to above-mentioned steps 403 to step 405 is carried out clearer explanation, still with the network equipment 1 and the network equipment 2 as needing two network equipments of Bandwidth adjustment, the embodiment of the present invention also provides for Adjust light subcarrier, light tributary signal and logic tributary signal implements process, such as Fig. 7 institute Show, including:

501: from described transmission unit, delete described n road logic tributary signal.

During the implementing of step 501, this step comprises the steps 5011 to step 5014。

5011: the network equipment 1 and the network equipment 2 initiate to delete n road logic tributary signal respectively Removal request.

Such as:, when deleting n road OPULL, this removal request is carried [Req_Remove, OPULLn] mark with the type and the number of OPULL to be deleted that represent this request.

5012: when, after the removal request receiving opposite end, sending the response of this removal request to opposite end.

Such as: this response carries the mark of [ACK, OPULLn].

5013: after receiving the response of this removal request of opposite end, initiate to delete and implement instruction, Sending during this deletion is implemented after instruction no longer by said n routes logic tributary signal carrying industry to represent Business.

Such as: this deletion is implemented instruction and carried the mark of [do_Remove, OPULLn],

5014: after instruction is implemented in the deletion receiving opposite end, local terminal is believed at said n routes logic branch road Business is no longer extracted in number；Send this deletion simultaneously to opposite end and implement the response of instruction.

Such as: this response can carry the sign of [ACK, OPULLn].

502: when after the response deleting enforcement instruction receiving opposite end, delete described n road logic Tributary signal.

503: m light tributary signal corresponding to the logic tributary signal of described n road is believed from light branch road Number group deletes and updates the expense of described smooth tributary signal group.

504: close m light subcarrier corresponding to described m light tributary signal.

It should be noted that after determining n logic tributary signal to be deleted, it deletes process is first Delete n OPULL and delete n ODULL of correspondence again, finally delete n OTULL of correspondence.

Additionally, why the bandwidth of the described transmission unit in the present invention can be adjusted, this and biography The frame structure of defeated unit is correlated with, and the frame structure of the transmission unit provided in the embodiment of the present invention is can root A kind of frame structure being adjusted according to the number of logic tributary signal.The frame structure bag of described transmission unit Include overhead area and payload section, described overhead area by the overhead area of logic tributary signal described in every road according in advance If byte interleaver successively is formed；Described payload section is by the payload section of logic tributary signal described in every road Formed according to described default byte interleaver successively.The time slot of the payload section of described transmission unit divides Method, as shown in Figure 8, specifically includes:

601: according to bandwidth and the pre-set bandwidths of single time slot of single channel logic tributary signal, determine list The number of time slot included in the logic tributary signal of road.

Wherein, the pre-set bandwidths of this single time slot can be 1.25Gbit/s.

As a width of 25Gbit/s of band of single channel logic tributary signal, the pre-set bandwidths of single time slot is During 1.25Gbit/s, the number that can obtain the time slot included in single channel logic calabash signal is 20 Individual.

602: determine described biography according to the number of logic tributary signal included in described transmission unit Total number of time slot included in defeated unit.

When transmission unit includes n logic tributary signal, the time slot that this transmission unit includes Total number is 20n.

603: carry out time slot division according to default byte.

Wherein, this default byte can be single byte namely 1 byte, it is also possible to for M byte, Wherein M is the positive integer more than 1.In a kind of implementation of default byte, M is single for transmission Metalogic realizes processing of circuit highway width, such as 16 bytes, 64 bytes, 128 bytes, 256 Byte etc..

In order to the frame structure of the transmission unit that the embodiment of the present invention provides clearly being introduced, hereafter Illustrate as a example by OTU frame structure.When by n logic tributary signal according to single byte successively between When inserting multiplexing, transmission unit is the OTU comprising n road OTULL, and the frame structure of this OTU is summarized In fact, including the frame structure of n OTULL, each OTULL includes overhead area and payload section, The payload section of each OTULL can be divided into 20 time slots, and each OTULL can include FEC Check field can not also include FEC check field, and the overhead area of all OTULL constitutes opening of OTU Area in which the goods are in great demand, the payload section of all OTULL constitutes the payload section of OTU, the FEC of all OTULL District constitutes the FEC district of OTU.

This OTU frame structure particularly as follows:

When comprising FEC check field in OTU, the size of this OTU is 4 row 4080*n row, Wherein, as it is shown in figure 9, the 1～7n row 7n altogether of the 1st row is classified as frame head instruction expense, the 1st row (7n+1)～14n row altogether 7n be classified as OTU overhead area, namely the overhead area of n road OTULL, The expense of every road OTULL is 7 row, and the 1～14n row 14n altogether of the 2nd～4 row is classified as ODU expense District, namely the overhead area of n road ODULL, (14n+1) of the 1st～4 row～16n row 2n row altogether For OPU overhead area, namely the overhead area of n road OPULL, (16n+1)～the 3824n of the 1st～4 row Row 3808n altogether is classified as OPU payload section, (3824n+1) of the 1st～4 row～4080n row 256n altogether It is classified as the FEC check field of OTU.

When not comprising FEC check field in OTU, the size of this OTU is 4 row 3824*n row, Wherein, as shown in Figure 10, the 1～7n row 7n altogether of the 1st row is classified as frame head instruction expense, the 1st row (7n+1)～14n row altogether 7n be classified as the overhead area of n road OTULL, every road OTULL opens Area in which the goods are in great demand is 7 row, and the 1～14n row 14n altogether of the 2nd～4 row is classified as the overhead area of n road ODULL, (14n+1) of the 1st～4 row～16n row 2n altogether is classified as the overhead area of n road OPULL, the 1st～4 (16n+1) of row～3824n row 3808n altogether are classified as OPU payload section.

It should be noted that OPU payload section includes containing filling row and without filling two kinds of situations of row, OTU frame structure shown in Fig. 9 and Figure 10 is the situation comprising and filling row, fills row and is OPU The last 8n row of payload section.

Divide mainly OPU payload additionally, build the time slot during the frame structure of transmission unit District carries out time slot division according to default byte.Wherein, this default byte can be single byte, OTU Include n road OTULL, with a width of 25Gbit/s of band of every road OTULL, presetting of each time slot Carry a width of 1.25Gbit/s, then arrange according to single byte at payload section 16n+1～3824n row 3808n altogether Interval is in turn divided into the time slot of 20n 1.25Gbit/s, and time-gap number is TS A.B；Wherein, A =1 ... n represents the logic tributary signal of different way, B=1 ... 20；Such as 1.1,2.1 ..., n.1, 1.2,2.2 ..., until n.20.

But when using frame structure as shown in Figure 9 and Figure 10, the internal related realization of logic circuit is by face Face space division and the time-division mutually changes the more cachings and selector demand brought, along with single channel logic branch road The lifting of signal bandwidth, these logical resource demands can the most non-linear lifting.Therefore the present invention implements Example additionally provides a kind of frame structure constituted by n road logic tributary signal by M byte interleaver, its Middle M is the positive integer more than 1.As Figure 11-1 show the payload section of single channel OTULL with M=16 byte (corresponding columns is 16 row) interleaves granularity as its time slot, divides the cycle using 20 frames as one The time slot of OPU payload section divides schematic diagram, and the payload section of single channel OTULL is in turn divided into 20 1.25Gbit/s time slot, time-gap number is that (wherein A=1 ... n, represents single channel OTULL to TS A.B Numbering；B=1 ... 20, the numbering of time slot in the OTULL of this road).Figure 11-2 show n road OTULL The schematic diagram of OPU payload section of the frame structure of the OTU formed according to M=16 byte intertexture division multiplexing, its bag Containing 20n 1.25Gbit/s time slot.

It should be noted that above-mentioned Figure 11-1 and Figure 11-2 illustrate only OPU payload section, wherein Shown in 15-16 row for time slot expense (English: Tributary slot overhead, to be called for short TSOH), Payload structure instruction (English: payload structure identifier, PSI) and multiple it is called for short: Frame indicates.

It should be noted that above-mentioned frame structure illustrates as a example by OTU frame structure, due to OPU, The relation encapsulated layer by layer is there is, the frame structure of OPU and the above-mentioned frame knot of OTU between ODU and OTU Structure is compared, its distinctive points without the overhead area of n road OTULL and the overhead area of n road ODULL, The frame structure of ODU is compared with the above-mentioned frame structure of OTU, and its distinctive points is without n road OTULL's Overhead area, thus the frame of OTU that the frame structure of ODU and OPU can provide according to embodiments of the present invention Structure is derived from, and the embodiment of the present invention repeats no more.

To sum up, the above-mentioned transmission unit frame constituted with multibyte interleaver that the embodiment of the present invention provides Structure has the following characteristics that compared to existing transmission unit frame structure

1) it is made up of by M byte interleaver n logic tributary signal.

2) each logic tributary signal is all to having overhead area and payload section.

3) time slot that the payload section of each logic tributary signal comprises interleaves granularity is M byte, namely Its payload section is made up of with M byte for interleaving granularity interleaver multiple time slots.

The frame structure of the above-mentioned transmission unit that the embodiment of the present invention provides is owing to patrolling it with the n road comprised Collect tributary signal and carry out one_to_one corresponding, the one of every road logic tributary signal correspondence transmission unit frame structure Part, it is possible to prop up by increasing or deleting a number of logic comprised in this transmission unit The frame structure of road signal and then the frame structure of adjustment transmission unit, thus reach to adjust the band of transmission unit Wide purpose.

Additionally, the above-mentioned frame structure that the embodiment of the present invention provides may be used for carrying mixed service and special project Business.

When carrying includes ODU business and flexible optical channel data transmission unit (ODUflex) business extremely When lacking the mixed service of two-way, wherein this ODU business can be low order ODU business, it is also possible to for height Rank ODU business, wherein, low order ODU business is to carry the client traffic of non-ODU business, high-order ODU business is the business of carrying low order ODU business, and as shown in figure 12, this process includes:

701: map multi-service (English: Optical to the light data tributary unit being made up of ts time slot Channel Data Tributary Unit, is called for short ODTU).

Wherein, in a kind of implementation of this step, GMP mapping mode can be used.

702: in the light data tributary unit being made up of ts time slot described in multiplexing to OPU and add OPU expense, in re-multiplexing OPU to ODU, in re-multiplexing ODU to OTU, and adds OTU expense.

During the implementing of this step, due to for the connection between point-to-point, thus can be by OTU regards multiplex section interface as, can omit ODU expense, and reduction processes complexity.

Certainly, during the implementing of this step, it is possible to add ODU with reference to prior art and open Pin.

703: map the n road OTULL light tributary signal to corresponding number, and add photosphere monitoring Expense, by PIC/PID light subcarrier transmission.

Additionally, when the bandwidth of the single channel logic tributary signal in the present embodiment is set to 25Gbit/s, The frame structure of the transmission unit that the embodiment of the present invention provides can also transmit the ether of carrying 25Gbit/s This special business of the flexible Optical Channel Data Unit-k business of business, and single due to transmission in prior art A width of 40Gbit/s or 100Gbit/s of band of unit, does not mates with the bandwidth of this special project business, thus nothing Method realizes the carrying of this type of special business.The process that implements of this special project service bearer is multinomial with carrying Mixed service is similar to, and is intended to through business mapping, multiplexing and adds administration overhead process, with it not Same is to need individual event business bit synchronous respectively is mapped into the flexible optical channel in n road before business maps Data transmission unit (flexible optical channel data transmission unit).Such as: when special business is n road During the Ethernet service of 25Gbit/s, it is necessary first to by the Ethernet service of n road 25Gbit/s respectively Bit synchronous is mapped into n road ODUflex, forms n road ODUflex (25G) business, then uses Step 701 realizes service bearer to the step of step 703.As shown in figure 13 for carrying n road The special business of ODUflex (25G) realize process schematic.

As the realization of above-mentioned each method, the embodiment of the present invention additionally provides a kind of Bandwidth adjustment device, Described device is applied in optical transport network, and the transmission unit in described optical transport network includes at least one Road logic tributary signal, the quantity of described logic tributary signal is adjustable, logic tributary signal described in every road Bandwidth equal and be preset value, the bandwidth of described transmission unit is equal to all described logic tributary signals Bandwidth sum, the light tributary signal group in described optical transport network includes at least one road light branch road letter Number, the quantity of described smooth tributary signal is adjustable, and as shown in figure 14, described device includes:

Acquisition module 801, for obtaining the bandwidth of current business to be transmitted.

Processing module 802, for the described current business to be transmitted obtained when described acquisition module 801 The current bandwidth of bandwidth and described transmission unit when there is bandwidth difference, determine according to described bandwidth difference and treat Quantity n of the logic tributary signal adjusted；

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be adjusted Quantity m of light tributary signal.

Adjusting module 803, for the logic described to be adjusted determined according to described processing module 802 Quantity n of tributary signal and quantity m of described light tributary signal to be adjusted adjust current photon and carry Ripple, current light tributary signal and the quantity of logic tributary signal.

Further, described processing module 802, specifically for:

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be increased Quantity m of light tributary signal.

Described adjusting module 803, specifically for:

Further, described processing module 802, specifically it is additionally operable to:

Described adjusting module 803, is specifically additionally operable to:

Close m light subcarrier corresponding to described m light tributary signal.

Further, the frame structure of described transmission unit includes overhead area and payload section, described overhead area Including the overhead area of logic tributary signal described in every road；Described payload section includes logic branch road described in every road The payload section of signal；

As shown in figure 15, described device also includes that time slot divides module 901, is used for:

Further, the described current business to be transmitted that described acquisition module 801 obtains is described for including At least two-way of optical channel data transmission unit business and flexible optical channel data transmission unit business Mixed service；Or

The device of the Bandwidth adjustment that the embodiment of the present invention provides, changes corresponding according to the bandwidth of current business Adjustment logic tributary signal, light tributary signal and the quantity of light subcarrier so that adjust optical transport network Bandwidth to provide suitable bandwidth for transmission current business, with the band in optical transport network in prior art Wide determination by the bandwidth of Ethernet interface and non-adjustable compare, the bandwidth of the optical transport network in the present invention For adjustable, it is thus possible to avoid because business to be transmitted is not mated with the current bandwidth of optical transport network And the bandwidth waste brought or the problem that cannot effectively transmit, it is achieved effective transmission of data.

As the realization of above-mentioned each method, the embodiment of the present invention additionally provides a kind of Bandwidth adjustment device, Described device is applied in optical transport network, and the transmission unit in described optical transport network includes at least one Road logic tributary signal, the quantity of described logic tributary signal is adjustable, logic tributary signal described in every road Bandwidth equal and be preset value, the bandwidth of described transmission unit is equal to all described logic tributary signals Bandwidth sum, the light tributary signal group in described optical transport network includes at least one road light branch road letter Number, the quantity of described smooth tributary signal is adjustable.

As shown in figure 16, described device includes processor 1001, memorizer 1002 and bus 1003, Processor 1001 is connected, wherein by bus 1003 with memorizer 1002:

Processor 1001, for obtaining the bandwidth of current business to be transmitted；

When the bandwidth of described current business to be transmitted obtained is deposited with the current bandwidth of described transmission unit When bandwidth difference, determine quantity n of logic tributary signal to be adjusted according to described bandwidth difference；

Further, described processor 1001, specifically for:

Close m light subcarrier corresponding to described m light tributary signal.

Described processor 1001, is additionally operable to:

Further, the described current business to be transmitted that described processor 1001 obtains is described for including At least two-way of optical channel data transmission unit business and flexible optical channel data transmission unit business Mixed service；Or

It should be noted that the processor 1001 described in the embodiment of the present invention can be a processor, It can also be the general designation of multiple treatment element.Such as, this processor 1001 can be central processing unit (Central Processing Unit is called for short CPU), it is also possible to be specific integrated circuit (Application Specific Integrated Circuit is called for short ASIC), or be configured to Implement one or more integrated circuits of the embodiment of the present invention, such as: one or more microprocessors (digital signal processor is called for short DSP), or, one or more field-programmable Gate array (Field Programmable Gate Array is called for short FPGA).

Memorizer 1002 can be a storage device, it is also possible to be the general designation of multiple memory element, And be used for storing executable program code etc..And memorizer 1002 can include random access memory (RAM), it is also possible to include nonvolatile memory (non-volatile memory), such as magnetic Disk storage, flash memory (Flash) etc..

Bus 1003 can be industry standard architecture (Industry Standard Architecture, ISA) bus, external equipment interconnection (Peripheral Component, PCI) Bus or extended industry-standard architecture (Extended Industry Standard Architecture, EISA) bus etc..This bus 1003 can be divided into address bus, data total Line, control bus etc..For ease of representing, Figure 16 only represents with a thick line, it is not intended that Only have a bus or a type of bus.

Through the above description of the embodiments, those skilled in the art is it can be understood that arrive The present invention can add the mode of required common hardware by software and realize, naturally it is also possible to by firmly Part, but a lot of in the case of the former is more preferably embodiment.Based on such understanding, the skill of the present invention The part that prior art is contributed by art scheme the most in other words can be with the form of software product Embodying, this computer software product is stored in the storage medium that can read, soft such as computer Dish, hard disk or CD etc., including some instructions with so that a computer equipment (can be individual Computer, server, or the network equipment etc.) perform the method described in each embodiment of the present invention.

The above, the only detailed description of the invention of the present invention, but protection scope of the present invention not office Being limited to this, any those familiar with the art, can in the technical scope that the invention discloses Readily occur in change or replace, all should contain within protection scope of the present invention.

Claims

1. a bandwidth adjusting method, it is characterised in that described method is applied in optical transport network, Transmission unit in described optical transport network includes at least one tunnel logic tributary signal, and described logic branch road is believed Number quantity adjustable, the bandwidth of logic tributary signal described in every road is equal and be preset value, described transmission list The bandwidth of unit is equal to the bandwidth sum of all described logic tributary signals, and the light in described optical transport network props up Road signal group includes at least one road light tributary signal, and the quantity of described smooth tributary signal is adjustable, described method Including:

Obtain the bandwidth of current business to be transmitted；

If there is bandwidth in the described bandwidth of current business to be transmitted and the current bandwidth of described transmission unit Difference, then determine quantity n of logic tributary signal to be adjusted according to described bandwidth difference；

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine light to be adjusted Quantity m of tributary signal；

Bandwidth adjusting method the most according to claim 1, it is characterised in that if described There is bandwidth difference, then according to described in the bandwidth of current business to be transmitted and the current bandwidth of described transmission unit Bandwidth difference determines quantity n of logic tributary signal to be adjusted, specifically includes:

If the band of described current business to be transmitted is wider than the current bandwidth of described transmission unit, then basis Described bandwidth difference determines quantity n of logic tributary signal to be increased；

Then, according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be adjusted Quantity m of light tributary signal, specifically include:

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine light to be increased Quantity m of tributary signal；

Then, according to quantity n and the described light to be adjusted of the logic tributary signal described to be adjusted determined Quantity m of tributary signal adjusts current light subcarrier, current light tributary signal and logic tributary signal Quantity, specifically include:

Described m light tributary signal is increased in described smooth tributary signal group and changes described smooth branch road The expense of signal group；

Activate n road logic tributary signal and described n road logic tributary signal is increased to described transmission unit In.

Bandwidth adjusting method the most according to claim 1, it is characterised in that if described There is bandwidth difference, then according to described in the bandwidth of current business to be transmitted and the current bandwidth of described transmission unit Bandwidth difference determines the quantity of logic tributary signal to be adjusted, specifically includes:

If described current service bandwidth to be transmitted is less than the current bandwidth of described transmission unit and described band According to described bandwidth difference, wide difference more than the bandwidth of single channel logic tributary signal, then determines that logic to be deleted is propped up Quantity n of road signal；

Then, according to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine to be adjusted The quantity of light tributary signal, specifically include:

According to the predetermined number corresponding relation of logic tributary signal Yu light tributary signal, determine light to be deleted Quantity m of tributary signal；

Then, according to quantity n and the described light to be adjusted of the logic tributary signal described to be adjusted determined Quantity m of tributary signal adjusts current light subcarrier, current light tributary signal and logic tributary signal Quantity, specifically includes:

By m light tributary signal corresponding to the logic tributary signal of described n road from light tributary signal group Delete and update the expense of described smooth tributary signal group；

Close m light subcarrier corresponding to described m light tributary signal.

4. according to the bandwidth adjusting method described in any one of claims 1 to 3, it is characterised in that

The frame structure of described transmission unit includes that overhead area and payload section, described overhead area are patrolled described in every road The overhead area collecting tributary signal is formed according to default byte successively interleaver；Described payload section is by every road institute The payload section stating logic tributary signal is formed according to described default byte interleaver successively；

Bandwidth according to single channel logic tributary signal and the pre-set bandwidths of single time slot, determine that single channel logic is propped up The number of time slot included in the signal of road；

Number according to logic tributary signal included in described transmission unit determines described transmission unit Total number of the time slot included by；

Time slot division is carried out according to described default byte.

Bandwidth adjusting method the most according to claim 1, it is characterised in that

Described current business to be transmitted is for including that described optical channel data transmission unit business and flexible light are led to The mixed service of at least two-way of track data transmission unit business；Or

Described current business to be transmitted is the flexible optical channel data sheet of the ether business of carrying 25Gbit/s Unit's business.

6. according to the bandwidth adjusting method described in any one of claim 1, it is characterised in that described biography Defeated unit includes at least in optical channel Payload Unit, Optical Channel Data Unit-k and optical channel transmission unit Kind.

7. a Bandwidth adjustment device, it is characterised in that described device is applied in optical transport network, Transmission unit in described optical transport network includes at least one tunnel logic tributary signal, and described logic branch road is believed Number quantity adjustable, the bandwidth of logic tributary signal described in every road is equal and be preset value, described transmission list The bandwidth of unit is equal to the bandwidth sum of all described logic tributary signals, and the light in described optical transport network props up Road signal group includes at least one road light tributary signal, and the quantity of described smooth tributary signal is adjustable, described device Including:

Processing module, for the bandwidth of described current business to be transmitted obtained when described acquisition module and institute State the current bandwidth of transmission unit when there is bandwidth difference, determine that logic to be adjusted is propped up according to described bandwidth difference Quantity n of road signal；

Adjusting module, for the logic tributary signal described to be adjusted that determines according to described processing module Quantity m of quantity n and described light tributary signal to be adjusted adjusts current light subcarrier, current light props up Road signal and the quantity of logic tributary signal.

Bandwidth adjustment device the most according to claim 7, it is characterised in that described processing module, Specifically for:

When the band of described current business to be transmitted is wider than the current bandwidth of described transmission unit, according to institute State bandwidth difference and determine quantity n of logic tributary signal to be increased；

Described adjusting module, specifically for:

Bandwidth adjustment device the most according to claim 7, it is characterised in that described processing module, Specifically it is additionally operable to:

When described current service bandwidth to be transmitted is less than the current bandwidth of described transmission unit and described bandwidth When difference is more than the bandwidth of single channel logic tributary signal, determine logic branch road to be deleted according to described bandwidth difference Quantity n of signal；

Described adjusting module, is specifically additionally operable to:

Close m light subcarrier corresponding to described m light tributary signal.

10. according to the Bandwidth adjustment device described in any one of claim 7 to 9, it is characterised in that

Described device also includes that time slot divides module, is used for:

Time slot division is carried out according to described default byte.

11. Bandwidth adjustment devices according to claim 7, it is characterised in that

The described current business to be transmitted that described acquisition module obtains is for including that described optical channel data are transmitted The mixed service of at least two-way of unit business and flexible optical channel data transmission unit business；Or