WO2023284337A1 - 光业务单元的映射方法及装置、存储介质、电子装置 - Google Patents

光业务单元的映射方法及装置、存储介质、电子装置 Download PDF

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Publication number
WO2023284337A1
WO2023284337A1 PCT/CN2022/085438 CN2022085438W WO2023284337A1 WO 2023284337 A1 WO2023284337 A1 WO 2023284337A1 CN 2022085438 W CN2022085438 W CN 2022085438W WO 2023284337 A1 WO2023284337 A1 WO 2023284337A1
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Prior art keywords
service unit
optical service
optical
sending
unit
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PCT/CN2022/085438
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English (en)
French (fr)
Inventor
王东
张源斌
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中兴通讯股份有限公司
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Publication of WO2023284337A1 publication Critical patent/WO2023284337A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • the present disclosure relates to the communication field, and in particular, to a method and device for mapping an optical service unit, a storage medium, and an electronic device.
  • an optical service unit (OSU for short) is used to implement flexible aggregation and bearing of multiple services. Multiple services are respectively mapped to different optical service units OSU, and fixed bandwidths are configured respectively.
  • the data streams of multiple optical service units are aggregated and mapped to the Payload Block (PB) of the Optical Payload Unit (OPU) of the Optical Transport Network (OTN) middle.
  • PB Payload Block
  • OPU Optical Payload Unit
  • OTN Optical Transport Network
  • the following method is used to calculate the mapping opportunities from OSU frames corresponding to different OSU services to PB in the OPU:
  • C is the reference rate multiple corresponding to the OSU service bandwidth
  • j is the payload block counter of the OSU service, which takes the value #1...#P, and cycles between 1 and P in sequence.
  • One round of counting is equal to a transmission period window
  • P is the transmission period.
  • the payload bandwidth rate is divided by the base rate value and rounded down to represent the line transmission capacity value.
  • the C value of all OSU services does not exceed the P value to ensure that the bandwidth is sufficient.
  • the flexible optical data unit Fexible Optical Data Unit for GFP-F mapped client signals, referred to as ODUFlex (GFP-F)
  • ODUFlex GFP-F
  • the ODU rate will change continuously. If the OSU sub-service is included, during the adjustment process, the P value corresponding to the ODU rate changes continuously, making it difficult to calculate and process the mapping opportunities.
  • Embodiments of the present disclosure provide a mapping method and device, a storage medium, and an electronic device for an optical service unit, so as to at least solve the problem in related technologies that, when the rate of an optical payload unit changes, the mapping process is complicated and the mapping opportunity cannot be calculated normally. And other issues.
  • An embodiment of the present disclosure provides a method for mapping an optical service unit, including: mapping an optical service unit to a payload block of an optical payload unit according to a predetermined sending order according to a first preset time, wherein the first preset Let the time be the time required to transmit one payload block in the optical payload unit.
  • An embodiment of the present disclosure also provides an optical service unit mapping device, including: a mapping module configured to map the optical service unit to the payload block of the optical payload unit according to the first preset time according to the predetermined sending order, wherein , the first preset time is the time required to transmit one payload block in the optical payload unit.
  • a computer-readable storage medium where a computer program is stored in the storage medium, wherein the computer program is set to execute any one of the above method embodiments when running in the steps.
  • an electronic device including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to perform any of the above Steps in the method examples.
  • the optical service unit is mapped to the payload block of the optical payload unit according to the predetermined sending order according to the first preset time, wherein the first preset time is when one of the optical payload units is transmitted
  • the time required for the payload block that is, only by determining the first preset time, the optical service unit is mapped to the payload block of the optical payload unit according to the first preset time, does not need to consider the rate factor of the optical service unit itself, simplifying processing requirements.
  • the rate of the optical service unit is determined according to the multiple of the reference rate of the optical service unit, and then the mapping process is performed according to the multiple of the reference rate and the transmission period.
  • the rate of the optical service unit is no longer limited by the multiple of the reference rate.
  • the bandwidth utilization rate is improved, and the mapping process of the optical service unit is simplified.
  • FIG. 1 is a flowchart (1) of a mapping method for an optical service unit according to an embodiment of the present disclosure
  • FIG. 2 is a system composition diagram of a mapping method of an optical service unit according to an embodiment of the present disclosure
  • FIG. 3 is a flow chart (2) of a mapping method for an optical service unit according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart (1) for constructing a timer according to a mapping method of an optical service unit according to an embodiment of the present disclosure
  • FIG. 5 is a flow chart (3) of a mapping method for an optical service unit according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart (2) for constructing a timer according to a mapping method of an optical service unit according to an embodiment of the present disclosure
  • FIG. 7 is a flow chart (4) of a mapping method of an optical service unit according to an embodiment of the present disclosure
  • FIG. 8 is a flow chart (3) for constructing a timer according to an optical service unit mapping method according to an embodiment of the present disclosure
  • FIG. 9 is a flowchart (5) of a mapping method of an optical service unit according to an embodiment of the present disclosure.
  • FIG. 10 is a processing diagram of a mapping method of an optical service unit according to an embodiment of the present disclosure.
  • FIG. 11 is a flowchart (6) of a mapping method of an optical service unit according to an embodiment of the present disclosure
  • FIG. 12 is a flowchart (7) of a mapping method for an optical service unit according to an embodiment of the present disclosure
  • FIG. 13 is a structural block diagram (1) of a mapping device for an optical service unit according to an embodiment of the present disclosure
  • Fig. 14 is a structural block diagram (2) of a mapping device for an optical service unit according to an embodiment of the present disclosure.
  • FIG. 1 is a flowchart (1) of a method for mapping an optical service unit according to an embodiment of the present disclosure, as shown in FIG. 1 display, including:
  • Step S202 Map the optical service unit to the payload block of the optical payload unit according to the predetermined sending order according to the first preset time, wherein the first preset time is when one payload is transmitted in the optical payload unit The time required for the block.
  • the optical service unit is mapped to the payload block of the optical payload unit according to the predetermined sending order according to the first preset time, wherein the first preset time is when a payload is transmitted in the optical payload unit
  • the time required for the load block that is, only by determining the first preset time, the optical service unit is mapped to the payload block of the optical payload unit according to the first preset time, does not need to consider the rate factor of the optical service unit itself, simplifying processing requirements.
  • the rate of the optical service unit is determined according to the multiple of the reference rate of the optical service unit, and then the mapping process is performed according to the multiple of the reference rate and the transmission period.
  • the rate of the optical service unit is no longer limited by the multiple of the reference rate.
  • the bandwidth utilization rate is improved, and the mapping process of the optical service unit is simplified.
  • the sending opportunity of the optical service unit is determined according to the second preset time and the number of received optical service unit bits, wherein the second preset time is calculated according to the theoretical rate of the optical service unit. The minimum time required for one frame of data in an optical service unit.
  • the theoretical rate of the optical service unit is determined by at least one of the following methods: determine the theoretical rate of the optical service unit according to the reference rate of the optical service unit and the multiple of the reference rate of the optical service unit; The theoretical rate and the mapping scale factor determine the theoretical rate of the optical service unit, where the mapping scale factor is used to indicate the ratio of the frame length to the payload length of the optical service unit.
  • the theoretical rate of the optical service unit corresponding to the second preset time can be determined by the product of the preset optical service unit reference rate and a multiple of the reference rate; the optical service unit corresponding to the second preset time
  • the theoretical rate can also be directly calculated according to the theoretical rate of the customer service multiplied by the ratio of the frame length of the optical service unit to the payload length of the optical service unit.
  • the service frequency offset coefficient of the optical service unit (1+service frequency offset tolerance).
  • the frame length of the optical service unit is 192 bytes
  • the payload length of the optical service unit is 185 bytes.
  • the mapping ratio coefficient is 192/185, It should be noted that different mapping methods have different mapping scale coefficients, which are not limited in this embodiment of the present disclosure.
  • the optical service unit corresponds to the first A frame of data in the buffer is written to the second buffer, wherein the first buffer is used to store the received optical service unit data, and the second buffer is used to store the optical service unit data in a predetermined sending sequence, and the The second cache is one or multiple caches with different priorities.
  • the data of the optical service unit when the data of the optical service unit is received, the data of the optical service unit is stored in the first cache, and at a specific timing, a frame of data corresponding to the optical service unit in the first cache is written into the second cache; To judge whether to write a frame of data in the first buffer corresponding to the optical service unit into the second buffer, it is necessary to determine whether the optical service unit has a sending opportunity. If the optical service unit has a sending opportunity, write the optical service unit corresponding to the first A frame of data in the first buffer is written into the second buffer; when the optical service unit does not have a sending opportunity, it is forbidden to write the corresponding frame of data in the first buffer of the optical service unit into the second buffer.
  • a periodic timer is set for the optical service unit, and when the counting time of the timer is equal to or greater than a second preset time, it is determined that the first sending moment has been reached or exceeded, and the The permission identification corresponding to the sending opportunity is updated to permission, and the timer is reset to automatically start the next cycle of timing; determine whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame; When the number of unit bits is greater than or equal to the length of an optical service unit frame, determine the permission identifier corresponding to the sending opportunity, wherein, in the case that the permission identifier corresponding to the sending opportunity is permission, assign the optical service unit Send opportunity, and clear the permission ID corresponding to the send opportunity.
  • start a timer and when the timer expires, update the permission identifier corresponding to the sending opportunity to permission, and if it is determined that the received optical service unit bit number is greater than or equal to the length of an optical service unit frame , and the permission identifier corresponding to the sending opportunity is permission, assign the sending opportunity to the optical service unit, and clear the permission identifier of the sending opportunity;
  • After allocating sending opportunities for the optical service unit determine whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, and determine whether the received optical service unit bit number is greater than or equal to one optical service unit In the case of the length of the frame, and if the permission identifier corresponding to the sending opportunity is permission, assign a sending opportunity to the optical service unit, and clear the permission identifier of the sending opportunity until there is no optical service unit data in the first buffer.
  • a periodic timer is set for the optical service unit, and when the counting time of the timer is equal to or greater than the second preset time, it is determined that the first sending moment has been reached or exceeded, and the sending opportunity Update the corresponding permission ID to permission, reset the timer, and automatically start the next period of timing; when it is determined that the permission ID corresponding to the sending opportunity is permission, clear the permission ID corresponding to the sending opportunity, and determine the whether the number of optical service unit bits received in the first buffer is greater than or equal to the length of an optical service unit frame; In this case, the optical service unit is assigned a sending opportunity.
  • the timing time of the timer is equal to or greater than the second preset time to determine whether the first sending moment has been reached or exceeded, and if it is determined that the first sending moment has been reached or exceeded, then Determine whether the number of bits of the optical service unit received in the first buffer is greater than or equal to the length of the optical service unit frame; determine whether the optical service unit data received in the first buffer is greater than or equal to the length of an optical service unit frame Next, assign a sending opportunity to the optical service unit.
  • the timer is reset after the second preset time passes each time, and after the sending opportunity is assigned to the optical service unit, it is determined again that the first Sending time, and when the number of bits of the second optical service unit received in the first buffer is greater than or equal to the length of the optical service unit frame, allocate a sending opportunity for the second optical service unit until there is no optical service unit in the first buffer business unit data.
  • the scheduling order of the plurality of optical service units is determined according to a preset first priority policy, and the plurality of optical service units are arranged according to the scheduling order
  • the data in is written into the second cache, wherein the first priority strategy includes: fixed order polling, service type priority sorting, cache depth sorting, and service number sorting.
  • the embodiment of the present disclosure provides two implementation methods of writing a frame of data corresponding to the optical service unit in the first cache to the second cache when the optical service unit has a sending opportunity, specifically as follows:
  • the second priority strategy includes at least one of the following: service type priority, cache depth, service number; according to the sorted target optical service unit sequence, the data of the target optical service unit is sequentially written into the target The second cache corresponding to the optical service unit.
  • the second priority policy sorts the optical service units, and writes the data of multiple optical service units with sending opportunities into the second cache one by one according to the sorted order.
  • different second caches corresponding to the plurality of optical service units are determined according to a preset scheduling strategy, and the preset scheduling strategy include at least one of the following: service type priority, cache depth, manually specified priority, and service number.
  • the multiple optical service units with transmission opportunities are sorted according to the second preset priority policy, and the sorted multiple optical service units with transmission opportunities are sorted.
  • Opportunistic optical service units are written into the second cache of the corresponding priority.
  • mapping the optical service unit to the payload block of the optical payload unit according to the predetermined sending order according to the first preset time includes: when the second buffer is a buffer, each Write a frame of data of the optical service unit into the payload block of the optical payload unit from the second buffer according to the first-in-first-out rule at intervals of the first preset time; in the second buffer In the case of a plurality of caches with different priorities, at each first preset time interval, the target second cache is determined from the multiple second caches according to the priority, and the target second cache is selected according to the first-in-first-out write a frame of data of the optical service unit into the payload block of the optical payload unit.
  • mapping the optical service unit to the payload block of the optical payload unit according to the first preset time includes: determining the target first transferred to the second buffer optical service unit; the target optical service unit is mapped into the payload block of the optical payload unit; in the case that the second cache is a plurality of caches with different priorities, the second cache with the highest priority is first determined, and the priority The highest second cache is used as the target second cache, and a frame of data of the optical service unit in the target second cache is mapped to the payload block.
  • the current rate and frame in the optical payload unit are determined according to the frame structure definition of the optical payload unit, the frame start time point, the number of payload blocks that have been transmitted, and the first preset time
  • the head position determines the position mapping time point of the current payload block in the optical payload unit; when the mapping time point of the current payload block is reached, and there is optical service unit data in the second cache, the second cache One frame of data in the optical service unit is mapped to the current payload block.
  • the optical payload unit in the line is divided into multiple payload blocks according to a fixed length, which are used to carry the data of the optical service unit.
  • Time point at the time point of mapping, according to the priority strategy from high to low, one frame of data of the unmapped optical service unit is obtained from the second cache and mapped into the payload block, wherein the time of two adjacent mappings
  • the time difference between the points is the first preset time; if there is no frame of data corresponding to the optical service unit in the second cache, the OAM frame or IDLE frame can be mapped into the payload block according to requirements.
  • the changed service rate is obtained; according to the changed service rate, a third preset time is calculated, and the The first preset time is adjusted to the third preset time.
  • the service rate of the optical payload unit is changed, for example: ODUFlex lossless bandwidth adjustment is performed, the service rate of the optical payload unit is changed, the transmission rate of the optical payload unit frame is changed, the third preset time is calculated, and the The first preset time is adjusted to the third preset time.
  • FIG. 2 is a system composition diagram of a mapping method for an optical service unit according to an embodiment of the present disclosure. As shown in FIG. 2 , it includes:
  • First cache After receiving the optical service unit, the backplane determines the optical service unit service corresponding to the optical service unit, and puts the optical service unit into the first buffer corresponding to the optical service unit service. It should be noted that the service of each optical service unit Corresponding to a first cache.
  • Second cache Write one frame of data of the optical service unit into the second cache from the first cache at a theoretical rate not exceeding the optical service unit, and wait for the data of the optical service unit to be mapped to the payload block of the optical payload unit .
  • the second cache may be one, or multiple caches with different priorities, and the multiple second caches may be sorted according to priorities.
  • the line mapping unit maps the optical service unit in the second buffer to the payload block of the optical payload unit according to the first preset time.
  • Fig. 3 is a flow chart (2) of the mapping method of an optical service unit according to an embodiment of the present disclosure, as shown in Fig. 3 , the specific steps are as follows:
  • Step S401 Determine the optical service unit service corresponding to the received optical service unit, and put the optical service unit into the first cache corresponding to the optical service unit service;
  • Step S402 According to the theoretical service rate of the OSU, calculate the second preset time required to transmit a frame of data of the optical service unit, provide a sending opportunity every time the second preset time passes, and read the optical service from the first buffer One frame of data of the unit, and one frame of data of the optical service unit is written to the second cache;
  • Step S403 Obtain the starting position of the payload block according to the position of the optical payload unit in the line, and map the data of the second buffered optical service unit into the transmitted payload block in a specific order.
  • calculating the second preset time required to transmit one frame of data of the optical service unit includes:
  • the second preset time for transmitting a frame of data of the optical service unit can be calculated according to the service rate of the optical service unit, and the timer can use a local clock, or a higher precision obtained from a service or an external clock source clock.
  • the second preset time OSU frame length*8/(OSU reference rate*reference rate multiple C); the typical value of the OSU frame length is 192 bytes, and after *8, it is 1536 bits.
  • the typical value of the OSU reference rate is 2.6 Mbps, and the value of OSU reference rate * reference rate multiple C corresponds to the service rate of the optical service unit.
  • the interval period is directly calculated according to the theoretical rate of the optical service unit, it is possible to adapt to any rate of optical service unit without considering the limit of the base rate.
  • OSU rate OSU theoretical rate*(1+OSU frequency deviation upper limit).
  • FIG. 4 is a diagram of a mapping method of an optical service unit according to an embodiment of the present disclosure.
  • Step S501 Calculate the timer interval T according to the theoretical service rate of the optical service unit
  • Step S502 start the timer
  • Step S503 After the timing T is up, update the permission identifier corresponding to the transmission opportunity of the optical service unit to permission, restart the timer, and execute step S502.
  • Step S504 Determine whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, and if it is determined that the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, perform step S505, If it is determined that the number of bits of the received optical service unit is less than the length of an optical service unit frame, perform step S504;
  • Step S505 Determine whether the permission identifier corresponding to the transmission opportunity of the optical service unit is updated to permission. If the permission identifier corresponding to the transmission opportunity of the optical service unit is updated to permission, perform step S506. If the transmission opportunity of the optical service unit corresponds to If the license ID is not updated to be licensed, execute step S504;
  • Step S506 Clear the license identifier corresponding to the sending opportunity of the optical service unit
  • Step S507 Allocate a sending opportunity for the optical service unit, and continue to execute steps S504-S507.
  • FIG. 6 is a mapping of an optical service unit according to an embodiment of the present disclosure
  • Method construction timer flowchart (2) the specific steps are as follows:
  • Step S601 Calculate the timer interval T according to the theoretical service rate of the optical service unit
  • Step S602 start the timer
  • Step S603 After the timer T is up, update the permission identifier corresponding to the transmission opportunity of the optical service unit to permission, restart the timer, and execute step S602.
  • Step S604 Determine whether the permission identifier corresponding to the transmission opportunity of the optical service unit is updated to permission. If the permission identifier corresponding to the transmission opportunity of the optical service unit is updated to permission, perform step S605. If the transmission opportunity of the optical service unit corresponds to If the license ID is not updated to be licensed, execute step S604;
  • Step S605 Clear the license identifier corresponding to the transmission opportunity of the optical service unit
  • Step S606 judging whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, and if it is determined that the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, perform step S607, If it is determined that the received optical service unit bit number is less than the length of an optical service unit frame, perform step S604;
  • Step S607 Allocate a sending opportunity for the optical service unit, and continue to execute steps S604-S607.
  • FIG. 8 is a mapping of an optical service unit according to an embodiment of the present disclosure
  • Method construction timer flowchart (3) the specific steps are as follows:
  • Step S701 Calculate the timer interval time T according to the theoretical service rate of the optical service unit
  • Step S702 start the timer
  • Step S703 After the timing T is up, update the permission identifier corresponding to the transmission opportunity of the optical service unit to permission;
  • Step S704 judging whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, and if it is determined that the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, perform step S705, If it is determined that the received optical service unit bit number is less than the length of an optical service unit frame, perform step S704;
  • Step S705 Determine whether the timer has expired, if the timer has expired, execute step S704, if the timer has not expired, execute step S704;
  • Step S706 Allocate a sending opportunity for the optical service unit
  • Step S707 restart the timer, and continue to execute steps S704-S707.
  • writing one frame of data of the optical service unit in the first buffer into the second buffer at least includes one of the following:
  • FIG. 10 is a processing diagram of a mapping method of an optical service unit according to an embodiment of the present disclosure.
  • Each optical service unit is processed independently, and it is determined whether each optical service unit meets the interval processing requirements, and multiple optical service units are determined. If the data of multiple optical service units is transferred to the second cache, multiple optical service units The data of the unit transfers the data of multiple optical service units to the second cache according to the second priority strategy, for example, the service data with a small serial number is preferentially transferred.
  • At least one of the following is included:
  • the second buffer processing adopts the FIFO first-in-first-out mechanism, and a frame of data of the optical service unit that first enters the second buffer is first mapped into the payload block;
  • FIG. 11 is a flowchart (6) of a mapping method for an optical service unit according to an embodiment of the present disclosure.
  • Step S901 Determine the mapping position of the PB block;
  • Step S902 Determine whether there is a frame of data of the optical service unit in the second cache, and if the second cache has a frame of data of the optical service unit, perform step S903, and if the second cache does not have a frame of data of the optical service unit In case, execute step S901;
  • Step S903 Map a frame of data of the rate-limited optical service unit cached by the second buffer to the payload block, and execute step S901.
  • the preset scheduling rules assign different priorities to multiple second buffers, and transfer them to the second buffers with corresponding priorities according to the service type of the optical service unit.
  • the frame data of the rate-limited optical service unit is mapped to the line payload block.
  • the CBR service type is transferred to the high-priority second cache
  • the PKT service type is transferred to the low-priority second cache.
  • the second cache with higher priority is mapped first, and then the second cache with lower priority is mapped when it is empty.
  • FIG. 12 is a flowchart (7) of a mapping method of an optical service unit according to an embodiment of the present disclosure, step S1001: determine the mapping position of the payload block;
  • Step S1002 Determine whether the second cache (1) has a frame of data of the optical service unit, and if there is a frame of data of the optical service unit in the second cache, execute step S1004, and there is no frame of data of the optical service unit in the second cache In the case of frame data, execute step S1003;
  • Step S1003 Determine whether the second cache (2) has a frame of data for the optical service unit, and if the second cache (2) has a frame of data for the optical service unit, perform step S1004, and store the data in the second cache (2) In the case that there is no one frame of data of the optical service unit, execute step S1001;
  • Step S1004 Map one frame of data of the buffered optical service unit whose rate has been limited to the payload block, and execute step S1001.
  • the second buffer before the second buffer caches a frame of data of the optical service unit whose rate has been limited is mapped to the payload block, at least one of the following is included:
  • the payload area of the optical payload unit of the line is divided into multiple payload blocks according to a fixed length, and the payload block is used to carry the data of the optical service unit.
  • the embodiment of the present disclosure proposes a mapping method for optical service units.
  • the optical service units to be mapped received by the backplane are stored in the first buffer, and the interval time is calculated according to the theoretical service rate of the optical service units.
  • From the first buffer Read one frame of data of the optical service unit in the middle, write the one frame of data of the obtained optical service unit into the second cache, obtain the one frame of data of the optical service unit to be mapped from the second cache according to the position of the payload block and perform map.
  • the method according to the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is Better implementation.
  • the technical solution of the present disclosure can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to enable a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present disclosure.
  • an optical service unit mapping device is also provided, and the device is used to implement the above embodiments and preferred implementation modes, and those that have been described will not be repeated.
  • the term "module” may be a combination of software and/or hardware that realizes a predetermined function.
  • the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
  • FIG. 13 is a structural block diagram (1) of a mapping device for an optical service unit according to an embodiment of the present disclosure. As shown in FIG. 13 , the device includes:
  • the mapping module 1102 is configured to map the optical service unit to the payload block of the optical payload unit according to a first preset time, wherein the first preset time is when one payload block is transmitted in the optical payload unit the time required.
  • the optical service unit is mapped to the payload block of the optical payload unit according to the predetermined sending order according to the first preset time, wherein the first preset time is when a payload is transmitted in the optical payload unit
  • the time required for the load block that is, only by determining the first preset time, the optical service unit is mapped to the payload block of the optical payload unit according to the first preset time, does not need to consider the rate factor of the optical service unit itself, which simplifies Process requests.
  • FIG. 14 is a structural block diagram (2) of an optical service unit mapping device according to an embodiment of the present disclosure.
  • the device further includes: a determining module 1104 configured to The preset time and the number of bits of the received optical service unit determine the sending opportunity of the optical service unit, wherein the second preset time is the shortest time required to calculate one frame of data of the received optical service unit according to the theoretical rate of the optical service unit .
  • the determination module 1104 is configured to determine the theoretical rate of the optical service unit at least by one of the following methods: determine the theoretical rate of the optical service unit according to the reference rate of the optical service unit and the multiple of the reference rate of the optical service unit; The theoretical rate of the client service of the optical service unit and the mapping scale factor determine the theoretical rate of the optical service unit, wherein the mapping scale factor is used to indicate the ratio of the frame length to the payload length of the optical service unit.
  • the theoretical rate of the optical service unit corresponding to the second preset time can be determined by the product of the preset optical service unit reference rate and a multiple of the reference rate; the optical service unit corresponding to the second preset time
  • the theoretical rate can also be directly calculated according to the theoretical rate of the customer service multiplied by the ratio of the frame length of the optical service unit to the payload length of the optical service unit.
  • the service frequency offset coefficient of the optical service unit (1+service frequency offset tolerance).
  • the frame length of the optical service unit is 192 bytes
  • the payload length of the optical service unit is 185 bytes.
  • the mapping ratio coefficient is 192/185, It should be noted that different mapping methods have different mapping scale coefficients, which are not limited in this embodiment of the present disclosure.
  • FIG. 14 is a structural block diagram (2) of a mapping device for an optical service unit according to an embodiment of the present disclosure.
  • the device further includes: a writing module 1106 configured to When the service unit has a sending opportunity, write a frame of data corresponding to the first cache of the optical service unit into the second cache, wherein the first cache is used to store the received data of the optical service unit, and the first cache
  • the second buffer is used to store the optical service unit data in a predetermined sending order, and the second buffer is one or multiple buffers with different priorities.
  • the data of the optical service unit when the data of the optical service unit is received, the data of the optical service unit is stored in the first cache, and at a specific timing, a frame of data corresponding to the optical service unit in the first cache is written into the second cache; To judge whether to write a frame of data in the first buffer corresponding to the optical service unit into the second buffer, it is necessary to determine whether the optical service unit has a sending opportunity. If the optical service unit has a sending opportunity, write the optical service unit corresponding to the first A frame of data in the first buffer is written into the second buffer; when the optical service unit does not have a sending opportunity, it is forbidden to write the corresponding frame of data in the first buffer of the optical service unit into the second buffer.
  • the determination module 1104 is further configured to determine whether the current time reaches or exceeds the first sending moment when it is determined that the number of received optical service unit bits is greater than or equal to the length of one optical service unit frame; When it is determined that the first sending moment is reached or exceeded, a sending opportunity is allocated to the optical service unit, wherein the time interval between two adjacent first sending moments is a second preset time.
  • a periodic timer is set for the optical service unit, and when the counting time of the timer is equal to or greater than a second preset time, it is determined that the first sending moment has been reached or exceeded, and the The permission identification corresponding to the sending opportunity is updated to permission, and the timer is reset to automatically start the next cycle of timing; determine whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame; When the number of unit bits is greater than or equal to the length of an optical service unit frame, determine the permission identifier corresponding to the sending opportunity, wherein, in the case that the permission identifier corresponding to the sending opportunity is permission, assign the optical service unit Send opportunity, and clear the permission ID corresponding to the send opportunity.
  • start a timer and when the timer expires, update the permission identifier corresponding to the sending opportunity to permission, and if it is determined that the received optical service unit bit number is greater than or equal to the length of an optical service unit frame , and if the permission identifier corresponding to the transmission opportunity is permission, assign the transmission opportunity to the optical service unit, and clear the permission identifier of the transmission opportunity;
  • the timing is reset after the second preset time After allocating sending opportunities for the optical service unit, determine whether the received optical service unit bit number is greater than or equal to the length of an optical service unit frame, and determine whether the received optical service unit bit number is greater than or equal to one optical service unit In the case of the length of the frame, and if the permission identifier corresponding to the sending opportunity is permission, assign a sending opportunity to the optical service unit, and clear the permission identifier of the sending opportunity until there is no optical service unit data in the first buffer.
  • the determining module 1104 is further configured to determine whether the received optical service unit bit number is greater than or equal to the length of one optical service unit frame when it is determined that the first sending moment is reached or exceeded; When the number of bits of the received optical service unit is greater than or equal to the length of an optical service unit frame, assign a sending opportunity to the optical service unit, wherein the time interval between two adjacent first sending moments is the second preset time; when When it is determined that the number of optical service unit bits received in the first buffer is less than the length of one optical service unit frame, wait for the next first sending moment.
  • a periodic timer is set for the optical service unit, and when the counting time of the timer is equal to or greater than the second preset time, it is determined that the first sending moment has been reached or exceeded, and the sending opportunity Update the corresponding permission ID to permission, reset the timer, and automatically start the next period of timing; when it is determined that the permission ID corresponding to the sending opportunity is permission, clear the permission ID corresponding to the sending opportunity, and determine the whether the number of optical service unit bits received in the first buffer is greater than or equal to the length of an optical service unit frame; In this case, the optical service unit is assigned a sending opportunity.
  • the timing time of the timer is equal to or greater than the second preset time to determine whether the first sending moment has been reached or exceeded, and if it is determined that the first sending moment has been reached or exceeded, then Determine whether the number of bits of the optical service unit received in the first buffer is greater than or equal to the length of the optical service unit frame; determine whether the optical service unit data received in the first buffer is greater than or equal to the length of an optical service unit frame Next, assign a sending opportunity to the optical service unit.
  • the timer is reset after the second preset time passes each time, and after the sending opportunity is assigned to the optical service unit, it is determined again that the first Sending time, and when the number of bits of the second optical service unit received in the first buffer is greater than or equal to the length of the optical service unit frame, assign a sending opportunity for the second optical service unit until there is no more bits in the first buffer Optical business unit data.
  • the writing module 1106 is also configured to query all optical service units in sequence to determine whether the current optical service unit has the sending opportunity; if it is determined that the current optical service unit has the sending opportunity, Then write a frame of data of the current optical service unit from the first buffer into the second buffer corresponding to the optical service unit; if it is determined that the current optical service unit does not have the sending opportunity, query The next optical business unit.
  • the writing module 1106 is further configured to determine the scheduling order of multiple optical service units according to the preset first priority policy when multiple optical service units have transmission opportunities, and Writing data in the plurality of optical service units to the second cache, wherein the first priority strategy includes: fixed order polling, service type priority sorting, buffer depth sorting, and service number sorting.
  • the writing module 1106 is also configured to independently determine a target optical service unit with a transmission opportunity among multiple optical service units; The units are sorted to obtain the sorted target optical service unit sequence, wherein the second priority policy includes at least one of the following: service type priority, buffer depth, and service number; according to the sorted target optical service unit sequence, the The data of the target optical service unit is sequentially written into the second cache corresponding to the target optical service unit.
  • each optical service unit determines whether each optical service unit has a sending opportunity;
  • the optical service units are sorted according to the second priority policy, and the data of multiple optical service units with sending opportunities are written into the second cache one by one according to the sorted order.
  • the mapping module 1102 is further configured to determine different second caches corresponding to the multiple optical service units according to a preset scheduling strategy when the second caches are multiple caches with different priorities , the preset scheduling strategy includes at least one of the following: service type priority, cache depth, manually specified priority, and service number.
  • the multiple optical service units with transmission opportunities are sorted according to the second preset priority policy, and the sorted multiple optical service units with transmission opportunities are sorted.
  • Opportunistic optical service units are written into the second cache of the corresponding priority.
  • the mapping module 1102 is further configured to, in the case that the second cache is a cache, at intervals of the first preset time, from the second cache according to the first-in-first-out rule, Write a frame of data of the optical service unit into the payload block of the optical payload unit; in the case that the second cache is a plurality of caches with different priorities, every interval of the first preset time, according to The priority is to determine the target second cache from multiple second caches, and write one frame of data of the optical service unit into the optical payload from the target second cache according to the first-in-first-out rule in the payload block of the unit.
  • mapping the optical service unit to the payload block of the optical payload unit according to the first preset time includes: determining that it is first transferred to the second cache The target optical service unit; the target optical service unit is mapped to the payload block of the optical payload unit; in the case that the second cache is a plurality of caches with different priorities, first determine the second cache with the highest priority , taking the second cache with the highest priority as the target second cache, mapping a frame of data of the optical service unit in the target second cache to the payload block, and there is no optical service in the second cache with the highest priority
  • unit data the second cache with the second highest priority is used as the target second cache, and one frame of data of the optical service unit in the target second cache is mapped to the payload block, or the highest priority
  • the second cache with data the second cache with the highest priority and with data is used as the target second cache, and one frame of data of the optical service unit in the target second cache is mapped to the
  • the current rate and frame in the optical payload unit are determined according to the frame structure definition of the optical payload unit, the frame start time point, the number of payload blocks that have been transmitted, and the first preset time
  • the head position determines the position mapping time point of the current payload block in the optical payload unit; when the mapping time point of the current payload block is reached, and there is optical service unit data in the second cache, the second cache One frame of data in the optical service unit is mapped to the current payload block.
  • the mapping module 1102 is further configured to obtain a changed service rate when the service rate of the optical payload unit is changed; and calculate a third predicted service rate according to the changed service rate. Set time, and adjust the first preset time to the third preset time.
  • the service rate of the optical payload unit is changed, for example: ODUFlex lossless bandwidth adjustment is performed, the service rate of the optical payload unit is changed, the transmission rate of the optical payload unit frame is changed, the third preset time is calculated, and the The first preset time is adjusted to the third preset time.
  • the above-mentioned modules can be realized by software or hardware. For the latter, it can be realized by the following methods, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned modules can be combined in any combination The forms of are located in different processors.
  • Embodiments of the present disclosure also provide a storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps in any one of the above method embodiments when running.
  • the above-mentioned storage medium may be configured to store a computer program for performing the following steps:
  • the above-mentioned storage medium may include but not limited to: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), Various media that can store computer programs, such as removable hard disks, magnetic disks, or optical disks.
  • ROM read-only memory
  • RAM random access memory
  • Various media that can store computer programs such as removable hard disks, magnetic disks, or optical disks.
  • Embodiments of the present disclosure also provide an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.
  • the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.
  • the above-mentioned processor may be configured to execute the following steps through a computer program:
  • the above-mentioned storage medium may include but not limited to: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), Various media that can store program codes such as removable hard disks, magnetic disks, or optical disks.
  • ROM read-only memory
  • RAM random access memory
  • Various media that can store program codes such as removable hard disks, magnetic disks, or optical disks.
  • each module or each step of the above-mentioned disclosure can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here
  • the steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation.
  • the present disclosure is not limited to any specific combination of hardware and software.

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Abstract

本公开提供了一种光业务单元的映射方法及装置、存储介质、电子装置，上述光业务单元的映射方法包括：根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间，即仅通过确定第一预设时间，根据第一预设时间将光业务单元映射到光净荷单元的净荷块，通过上述技术方案，解决了相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会等问题。

Description

光业务单元的映射方法及装置、存储介质、电子装置
本公开要求于2021年7月14日提交中国专利局、申请号为202110796443.6、发明名称“光业务单元的映射方法及装置、存储介质、电子装置”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及通信领域，具体而言，涉及一种光业务单元的映射方法及装置、存储介质、电子装置。
背景技术
当前相关技术中，采用光业务单元(Optical Service Unit，简称为OSU)的方式来实现对多业务的灵活汇聚承载。多路业务分别映射到不同的光业务单元OSU，分别配置固定带宽。多路光业务单元的数据流汇聚后映射到光传送网(Optical Transport Network，简称为OTN)的光净荷单元(Optocal Payload Unit，简称为OPU)的净荷块(Payload Block，简称为PB)中。
通常按下述方法来计算不同OSU业务对应OSU帧到OPU中PB的映射机会：在j*C Mod P<C的情况下，获取映射机会，其中，C为OSU业务带宽对应的基准速率倍数，j为OSU业务的净荷块计数器，取值#1…#P，在1到P之间依次循环，计数一轮等于一个传送周期窗口，P为传送周期，在考虑频偏因素后，OPU净荷带宽速率除以基准速率值向下取整，代表线路传输能力数值，所有OSU业务的C值不超过P值来计算保证带宽足够。
可以得到，在基准速率固定情况下，上述方案中的P值和OPU带宽直接相关，C值和OSU业务带宽直接对应，在上述参数都固定不变情况下，可以实现映射机会的计算。目前现有技术中，基于GFP-F客户信号映射定义的灵活光通路数据单元(Flexible Optical Data Unit for GFP-F mapped client signals，简称为ODUFlex(GFP-F))，可以实现ODUFlex无损带宽调整，调整过程中ODU速率会连续改变。如果包含了OSU子业务，则调整过程中，ODU速率对应的P值由于连续变化，难于进行映射机会的计算处理。
针对相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会等问题，尚未提出有效的技术方案。
发明内容
本公开实施例提供了一种光业务单元的映射方法及装置、存储介质、电子装置，以至少解决相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会等问题。
本公开实施例提供了一种光业务单元的映射方法，包括：根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
本公开实施例还提供了一种光业务单元的映射装置，包括：映射模块，设置为根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
根据本公开的又一个实施例，还提供了一种计算机可读的存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
根据本公开的又一个实施例，还提供了一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行上述任一项方法实施例中的步骤。
通过上述技术方案，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间，即仅通过确定第一预设时间，根据第一预设时间将光业务单元映射到光净荷单元的净荷块，不需要考虑光业务单元本身速率因素，简化了处理要求。通过上述技术方案，解决了相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会的问题，进而可以更灵活地配置光业务单元的速率，相关技术中，通常根据光业务单元的基准速率倍数确定光业务单元的速率，进而根据基准速率倍数和传送周期进行映射处理，而通过本公开的技术方案，光业务单元的速率不再受基准速率倍数的限制，提高了带宽利用率，简化了光业务单元的映射过程。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1是根据本公开实施例的光业务单元的映射方法的流程图(一)；
图2是根据本公开实施例的光业务单元的映射方法的系统组成图；
图3是根据本公开实施例的光业务单元的映射方法的流程图(二)；
图4是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(一)；
图5是根据本公开实施例的光业务单元的映射方法的流程图(三)；
图6是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(二)；
图7是根据本公开实施例的光业务单元的映射方法的流程图(四)；
图8是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(三)；
图9是根据本公开实施例的光业务单元的映射方法的流程图(五)；
图10是根据本公开实施例的光业务单元的映射方法的处理图；
图11是根据本公开实施例的光业务单元的映射方法的流程图(六)；
图12是根据本公开实施例的光业务单元的映射方法的流程图(七)；
图13是根据本公开实施例的光业务单元的映射装置的结构框图(一)；
图14是根据本公开实施例的光业务单元的映射装置的结构框图(二)。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
根据本公开的一个实施例，提供了一种光业务单元的映射方法，应用于通信设备，图1是根据本公开实施例的光业务单元的映射方法的流程图(一)，如图1所示，包括：
步骤S202，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
通过上述步骤，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间，即仅通过确定第一预设时间，根据第一预设时间将光业务单元映射到光净荷单元的净荷块，不需要考虑光业务单元的本身速率因素，简化了处理要求。通过上述技术方案，解决了相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会的问题，进而可以更灵活地配置光业务单元的速率，相关技术中，通常根据光业务单元的基准速率倍数确定光业务单元的速率，进而根据基准速率倍数和传送周期进行映射处理，而通过本公开的技术方案，光业务单元的速率不再受基准速率倍数的限制，提高了带宽利用率，简化了光业务单元的映射过程。
在一个示例性实施例中，根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会，其中，所述第二预设时间为根据光业务单元的理论速率计算接收光业务单元一帧数据所需要的最短时间。
也就是说，确定光业务单元的理论速率接收光业务单元的一帧数据所需要的时间，将所述光业务单元的理论速率接收光业务单元一帧数据所需要的时间作为第二预设时间，在确定所述第一缓存中接收到的光业务单元数据大于等于一个光业务单元帧的长度，且当前时间点和发送上一个光业务单元的第一发送时刻的差值大于或等于第二预设时间的情况下，为所述光业务单元分配一次映射机会。
具体的，至少通过以下之一方法确定所述光业务单元的理论速率：根据光业务单元的基准速率和光业务单元的基准速率倍数确定所述光业务单元的理论速率；根据光业务单元的客户业务理论速率和映射比例系数确定所述光业务单元的理论速率，其中，所述映射比例系数用于指示所述光业务单元的帧长与净荷长度的比值。
也就是说，所述第二预设时间对应的光业务单元的理论速率可以由预设的光业务单元基准速率与基准速率倍数的乘积确定；所述第二预设时间对应的光业务单元的理论速率也可以根据客户业务理论速率乘以所述光业务单元的帧长与光业务单元的净荷长度的比值直接计算，需要说明的是，计算接收光业务单元一帧数据所需要的最短时间需要考虑频偏的影响，也就是说，光业务单元速率＝光业务单元的理论速率*光业务单元的业务频偏系数。光业务单元的业务频偏系数＝(1+业务频偏容限)。举例来讲，光业务单元的帧长为192字节，光业务 单元的净荷长度为185字节，在光业务单元的数据将净荷填满的情况下，映射比例系数为192/185，需要说明的是，不同的映射方法映射比例系数不同，本公开实施例对此不做限定。
在一个示例性实施例中，根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会之后，当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存，其中，所述第一缓存用于存储接收到的光业务单元数据，所述第二缓存用于存储预定发送顺序的光业务单元数据，所述第二缓存为一个或不同优先级的多个缓存。
也就是说，在接收到光业务单元数据的情况下，将光业务单元数据存储至第一缓存，在特定时机，将光业务单元对应第一缓存中的一帧数据写入到第二缓存；判断是否将光业务单元对应第一缓存中的一帧数据写入到第二缓存，需要确定光业务单元的是否具有发送机会，在光业务单元具有发送机会的情况下，将光业务单元对应第一缓存中的一帧数据写入到第二缓存；在光业务单元不具有发送机会的情况下，禁止将光业务单元对应第一缓存中的一帧数据写入到第二缓存。
为光业务单元分配发送机会的方式有很多种，本公开实施例给出了两种实现方式，具体如下：
1)在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定当前时间是否到达或超过第一发送时刻；在确定到达或超过所述第一发送时刻时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间。
具体的，为所述光业务单元设置周期性的定时器，当所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过所述第一发送时刻，将所述发送机会对应的许可标识更新为许可，并重置定时器，自动启动下一周期计时；确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定所述发送机会对应的许可标识，其中，在所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会对应的许可标识。
换言之，启动一个定时器，在定时器超时的情况下，将所述发送机会对应的许可标识更新为许可，在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，且所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会许可标识；需要说明的是，每次经过第二预设时间后重置定时器，为所述光业务单元分配发送机会之后，再次确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度，在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，且所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会许可标识，直至第一缓存中没有光业务单元数据。
2)在确定到达或超过第一发送时刻的情况下，确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；当确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间；当确定所述第一缓存中接收到的光业务单元比特数小于一个光业务单元帧的长度时，等待下一个第一发送时刻。
具体的，为所述光业务单元设置周期性的定时器，在所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过第一发送时刻，将所述发送机会对应的许可标识更 新为许可，并重置定时器，自动启动下一周期计时；在确定所述发送机会对应的许可标识为许可的情况下，清除所述发送机会对应的许可标识，并确定所述第一缓存中接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；在确定所述第一缓存中接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，为所述光业务单元分配发送机会。
也就是说，在此方式中，通过所述定时器的计时时间等于或大于第二预设时间，确定是否到达或超过第一发送时刻，在确定到达或超过第一发送时刻的情况下，再确定所述第一缓存中接收到的光业务单元比特数是否大于或等于光业务单元帧的长度；确定第一缓存中接收到的光业务单元数据大于或等于一个光业务单元帧的长度的情况下，为所述光业务单元分配发送机会，需要说明的是，每次经过第二预设时间后重置定时器，在为所述光业务单元分配发送机会之后，再次确定到达或超过第一发送时刻，且第一缓存中接收到的第二光业务单元比特数大于或等于光业务单元帧的长度的情况下，为所述第二光业务单元分配发送机会，直至第一缓存中没有光业务单元数据。
在一个示例性实施例中，当多个光业务单元具有发送机会时，根据预设的第一优先级策略确定多个光业务单元的调度顺序，并按调度顺序将所述多个光业务单元中的数据写入到所述第二缓存，其中，所述第一优先级策略包括：固定顺序轮询、业务类型优先级排序、缓存深度排序、业务编号排序。
本公开实施例给出了两种当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存的实现方式，具体如下：
1)依次查询所有光业务单元，确定当前光业务单元是否具有所述发送机会；在确定当前光业务单元具有所述发送机会的情况下，则将所述当前光业务单元的一帧数据从所述第一缓存中写入所述光业务单元对应的第二缓存；在确定当前光业务单元不具有所述发送机会的情况下，则查询下一个光业务单元。
也就是说，逐一轮询判定第一缓存中是否具有发送机会的光业务单元，如果具有发送机会的光业务单元，将光业务单元的一帧数据写入到第二缓存，在确定光业务单元不具有所述发送机会的情况下，则查询下一个光业务单元。
2)独立确定多个光业务单元中具有发送机会的目标光业务单元；将所述目标光业务单元根据第二优先级策略对目标光业务单元进行排序，得到排序后的目标光业务单元序列，其中，所述第二优先级策略至少包括以下之一：业务类型优先级、缓存深度、业务编号；根据排序后的目标光业务单元序列将所述目标光业务单元的数据依次写入所述目标光业务单元对应的第二缓存。
换言之，各个光业务单元独立处理的情况下，确定各个光业务单元是否具有发送机会，如果存在多个具有发送机会的光业务单元的情况下，则按业务类型优先级、缓存深度、业务编号等第二优先级策略对光业务单元进行排序，根据排序后的顺序将多个具有发送机会的光业务单元的数据一一写入第二缓存。
在一个示例性实施例中，在第二缓存为不同优先级的多个缓存的情况下，根据预设调度策略确定所述多个光业务单元对应的不同第二缓存，所述预设调度策略至少包括以下之一：业务类型优先级、缓存深度、人工指定优先级、业务编号。
上述实施例中，在多个第二缓存的优先级不同的情况下，将所述多个具有发送机会的光 业务单元按照第二预设优先级策略进行排序，将排序后的多个具有发送机会的光业务单元写入对应的优先级的第二缓存中。
在一个示例性实施例中，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，包括：在所述第二缓存为一个缓存的情况下，每间隔第一预设时间，从所述第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中；在第二缓存为不同优先级的多个缓存的情况下，每间隔第一预设时间，根据优先级从多个所述第二缓存中确定目标第二缓存，从所述目标第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中。
也就是说，在第二缓存为一个缓存的情况下，根据第一预设时间将光业务单元映射到光净荷单元的净荷块中，包括：确定最先转移到第二缓存中的目标光业务单元；将目标光业务单元映射到光净荷单元的净荷块中；在第二缓存为不同优先级的多个缓存的情况下，首先确定优先级最高的第二缓存，将优先级最高的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，在优先级最高的第二缓存中没有光业务单元的数据的情况下，将优先级第二最高的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，或者确定优先级最高的且具有数据的第二缓存，将优先级最高的且具有数据的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，在优先级最高且有数据的第二缓存中没有光业务单元数据的情况下，确定优先级第二最高且有数据的第二缓存，将在优先级第二最高且有数据的第二缓存中的光业务单元的一帧数据映射到净荷块中。
在另一示例性实施例中，根据光净荷单元帧结构定义、帧起始时间点、已经传输的净荷块个数和第一预设时间，确定光净荷单元中当前的速率和帧头位置确定光净荷单元中当前净荷块的位置映射时间点；在到达当前净荷块的映射时间点，且在所述第二缓存中存在光业务单元数据的情况下，将第二缓存中的光业务单元一帧数据映射到当前净荷块中。
需要说明的是，线路中的光净荷单元按固定长度划分为多个净荷块，用于承载光业务单元的数据，根据光净荷单元的业务速率确定每一个净荷块映射的周期和时间点，在映射的时间点，按优先级策略从高到低，从第二缓存中获取未映射的光业务单元的一帧数据映射到净荷块中，其中，相邻两个映射的时间点的时间差为第一预设时间；如果第二缓存中没有光业务单元对应的一帧数据的情况下，可以根据要求将OAM帧或IDLE帧映射到净荷块中。
在一个示例性实施例中，在所述光净荷单元的业务速率变更的情况下，获取变更后的业务速率；根据所述变更后的业务速率，计算第三预设时间，并将所述第一预设时间调整至所述第三预设时间。
当执行光净荷单元的业务速率变更时，例如：执行ODUFlex无损带宽调整，光净荷单元的业务速率发送变更，光净荷单元帧的发送速率变更，计算第三预设时间，并将所述第一预设时间调整至所述第三预设时间。
为了更好的理解上述本公开，以下结合几个可选实施例对上述光业务单元的映射方法的流程进行解释说明，但不用于限定本公开实施例的技术方案。
根据本公开的一个实施例，提供了一种光业务单元的映射方法的系统，图2是根据本公开实施例的光业务单元的映射方法的系统组成图，如图2所示，包括：
第一缓存、第二缓存和光业务单元到净荷块的线路映射单元。
第一缓存：背板接收到光业务单元后，确定光业务单元对应的光业务单元业务，将光业务单元放入光业务单元业务对应的第一缓存，需要说明的是每个光业务单元业务对应一个第一缓存。
第二缓存：从第一缓存按不超过光业务单元的理论速率将光业务单元的一帧数据写入第二缓存中，并等待将光业务单元的数据映射到光净荷单元的净荷块。第二缓存可以是一个，也可以是不同优先级的多个缓存，多个第二缓存之间可以根据优先级排序。
线路映射单元：根据第一预设时间将第二缓存中的光业务单元映射到光净荷单元的净荷块中。
图3是根据本公开实施例的光业务单元的映射方法的流程图(二)，如图3所示，具体步骤如下：
步骤S401：将接收到的光业务单元，确定光业务单元对应的光业务单元业务，将光业务单元放入光业务单元业务对应的第一缓存；
步骤S402：根据OSU的业务理论速率，计算传递光业务单元的一帧数据所需要的第二预设时间，每经过第二预设时间，提供一次发送机会，从第一缓存中读取光业务单元的一帧数据，并将光业务单元的一帧数据写入到第二缓存；
步骤S403：根据线路中的光净荷单元的位置，获取净荷块的起始位置，将第二缓存的光业务单元的数据按照特定顺序映射到发送的净荷块中。
在一个示例性实施例中，根据OSU的业务理论速率，计算传递光业务单元的一帧数据所需要的第二预设时间，包括：
计算传递光业务单元的一帧数据的第二预设时间，每经过第二预设时间，提供一次发送机会，将第一缓存中的光业务单元的一帧数据写入第二缓存；需要说明的是，可以根据光业务单元的业务速率来进行计算传递光业务单元的一帧数据的第二预设时间，定时器可以使用本地时钟，也可以使用从业务或外部时钟源获取的更高精度的时钟。
在一个示例性实施例中，第二预设时间＝OSU帧长*8/(OSU基准速率*基准速率倍数C)；OSU帧长典型值192字节，*8后为1536bit。OSU基准速率典型值2.6Mbps，OSU基准速率*基准速率倍数C的值和光业务单元业务速率对应。
在一个示例性实施例中，还可以根据以下公式确定第二预设数据：第二预设时间＝OSU帧长*8/(OSU速率)。
需要说明的是，若直接根据光业务单元的理论速率计算间隔周期的情况下，可以不考虑基准速率限制，适应任何速率的光业务单元。另外，为了保证任何情况下可以正常传输光业务单元的数据，相邻两个光业务单元的转移的间隔周期需要考虑最大频偏的极限情况，OSU速率＝OSU理论速率*(1+OSU频偏上限)。另外，需要确保分配光业务单元的业务速率的带宽总和，不超过线路速率。可以根据光业务单元速率和光净荷单元速率，再考虑频偏和预留1000ppm带宽因素进行计算，如下：
ΣOSU速率i*(1+OSU频偏上限)<OPU净荷速率(1-OPU频偏上限)/(1+0.001)
需要说明的是，如果需要预留更多的带宽，直接修改预留带宽的参数，在配置业务时进行限制。
在一个示例性实施例中，将第一缓存中的光业务单元的一帧数据写入第二缓存之前，如图4所示，图4是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(一)， 具体步骤如下：
步骤S501：根据光业务单元的业务理论速率计算定时器间隔时间T；
步骤S502：启动定时器；
步骤S503：定时T到后，将光业务单元的发送机会对应的许可标识更新为许可，重启定时器，执行步骤S502。
构建定时器之后，还包括：如图5所示，具体的：
步骤S504：确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度，若确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，执行步骤S505，若确定接收到的光业务单元比特数小于一个光业务单元帧的长度的情况下，执行步骤S504；
步骤S505：判断光业务单元的发送机会对应的许可标识是否更新为许可，若光业务单元的发送机会对应的许可标识更新为许可的情况下，执行步骤S506，若光业务单元的发送机会对应的许可标识没有更新为许可的情况下，执行步骤S504；
步骤S506：清除光业务单元的发送机会对应的许可标识；
步骤S507：为所述光业务单元分配发送机会，继续执行步骤S504-S507。
在一个示例性实施例中，将第一缓存中的光业务单元的一帧数据写入第二缓存之前，包括：如图6所示，图6是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(二)，具体步骤如下：
步骤S601：根据光业务单元的业务理论速率计算定时器间隔时间T；
步骤S602：启动定时器；
步骤S603：定时T到后，将光业务单元的发送机会对应的许可标识更新为许可，重启定时器，执行步骤S602。
构建定时器之后，还包括：如图7所示，具体的：
步骤S604：判断光业务单元的发送机会对应的许可标识是否更新为许可，若光业务单元的发送机会对应的许可标识更新为许可的情况下，执行步骤S605，若光业务单元的发送机会对应的许可标识没有更新为许可的情况下，执行步骤S604；
步骤S605：清除光业务单元的发送机会对应的许可标识；
步骤S606：判断接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度，若确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，执行步骤S607，若确定接收到的光业务单元比特数小于一个光业务单元帧的长度的情况下，执行步骤S604；
步骤S607：为所述光业务单元分配发送机会，继续执行步骤S604-S607。
在一个示例性实施例中，将第一缓存中的光业务单元的一帧数据写入第二缓存之前，包括：如图8所示，图8是根据本公开实施例的光业务单元的映射方法的构建定时器流程图(三)，具体步骤如下：
步骤S701：根据光业务单元的业务理论速率计算定时器间隔时间T；
步骤S702：启动定时器；
步骤S703：定时T到后，将光业务单元的发送机会对应的许可标识更新为许可；
构建定时器之后，还包括：如图9所示，具体的：
步骤S704：判断接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度，若确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，执行步骤S705， 若确定接收到的光业务单元比特数小于一个光业务单元帧的长度的情况下，执行步骤S704；
步骤S705：判断定时器是否已超时，若定时器已超时的情况下，执行步骤S704，若定时器未超时的情况下，执行步骤S704；
步骤S706：为所述光业务单元分配发送机会；
步骤S707：重新启动定时器，继续执行步骤S704-S707。
在一个示例性实施例中，将第一缓存中的光业务单元的一帧数据写入第二缓存，至少包括以下之一：
按特定顺序，逐一轮询判定每个业务是否满足间隔时间要求，如果有满足间隔时间要求的光业务单元的一帧数据，则将光业务单元的一帧数据写入到第二缓存；如图10所示，图10是根据本公开实施例的光业务单元的映射方法的处理图；
各个光业务单元独立处理，判定各个光业务单元是否满足间隔时间处理要求，并确定多个光业务单元，如果将多个光业务单元的数据转移到第二缓存的情况下，即将多个光业务单元的数据按第二优先级策略将多个光业务单元的数据转移到第二缓存中，例如优先转移编号小的业务数据。
在一个示例性实施例中，将第二缓存中缓存的已经限制好速率的多个光业务单元的数据映射到净荷块之前，至少包括以下至少之一：
第二缓存处理采用FIFO先入先出机制，最先进入第二缓存的光业务单元的一帧数据，最先被映射到净荷块中；
具体的，如图11所示，图11是根据本公开实施例的光业务单元的映射方法的流程图(六)，步骤S901：确定PB块的映射位置；
步骤S902：确定第二缓存是否有光业务单元的一帧数据，在第二缓存有光业务单元的一帧数据的情况下，执行步骤S903，在第二缓存没有光业务单元的一帧数据的情况下，执行步骤S901；
步骤S903：将第二缓存将缓存的已经限制好速率的光业务单元的一帧数据映射到净荷块，执行步骤S901。
根据预设调度规则为多个第二缓存分配不同的优先级，根据光业务单元的业务类型转移到对应优先级的第二缓存中，根据第二缓存的优先级，依次将第二缓存的已经限制好速率的光业务单元的帧数据映射到到线路净荷块中，例如CBR业务类型转移到高优先级第二缓存，PKT业务类型转移到低优先级第二缓存。优先级高的第二缓存优先映射，为空后再映射低优先级第二缓存。
具体的，如图12所示，图12是根据本公开实施例的光业务单元的映射方法的流程图(七)，步骤S1001：确定净荷块的映射位置；
步骤S1002：确定第二缓存(1)是否有光业务单元的一帧数据，在第二缓存有光业务单元的一帧数据的情况下，执行步骤S1004，在第二缓存没有光业务单元的一帧数据的情况下，执行步骤S1003；
步骤S1003：确定第二缓存(2)是否有光业务单元的一帧数据，在第二缓存(2)有光业务单元的一帧数据的情况下，执行步骤S1004，在第二缓存(2)没有光业务单元的一帧数据的情况下，执行步骤S1001；
步骤S1004：将缓存的已经限制好速率的光业务单元的一帧数据映射到到净荷块，执行 步骤S1001。
在一个示例性实施例中，将第二缓存将缓存的已经限制好速率的光业务单元的一帧数据映射到到净荷块之前，至少包括以下至少之一：
根据光净荷单元的业务速率确定每一个净荷块映射的周期和时间点，在映射的时间点，按优先级策略从高到低，从第二缓存中获取未映射的光业务单元的一帧数据映射到净荷块中，如果第二缓存中没有光业务单元的一帧数据的情况下，可以根据要求将OAM帧或IDLE帧映射到净荷块中。
需要说明的是，线路的光净荷单元的净荷区，按固定长度划分为多个净荷块，净荷块用于承载光业务单元的数据。
本公开实施例，提出了一种光业务单元的映射方法，针对背板接收到的待映射的光业务单元存入第一缓存，根据光业务单元的业务理论速率计算间隔时间，从第一缓存中读取光业务单元的一帧数据，将得到的光业务单元的一帧数据写入第二缓存，根据净荷块的位置从第二缓存中获取需要映射的光业务单元的一帧数据进行映射。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本公开各个实施例所述的方法。
在本实施例中还提供了一种光业务单元的映射装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图13是根据本公开实施例的光业务单元的映射装置的结构框图(一)，如图13所示，该装置包括：
映射模块1102，设置为根据第一预设时间将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
通过上述装置，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间，即仅通过确定第一预设时间，根据第一预设时间将光业务单元映射到光净荷单元的净荷块，不需要考虑光业务单元本身速率因素，简化了处理要求。通过上述技术方案，解决了相关技术中，在光净荷单元速率变更的情况下，映射处理复杂，无法正常计算映射机会的问题。
在一个示例性实施例中，图14是根据本公开实施例的光业务单元的映射装置的结构框图(二)，如图14所示，该装置还包括：确定模块1104，设置为根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会，其中，所述第二预设时间为根据光业务单元的理论速率计算接收光业务单元一帧数据所需要的最短时间。
也就是说，确定光业务单元的理论速率接收光业务单元的一帧数据所需要的时间，将所述光业务单元的理论速率接收光业务单元一帧数据所需要的时间作为第二预设时间，在确定所述第一缓存中接收到的光业务单元数据大于等于一个光业务单元帧的长度，且当前时间点 和发送上一个光业务单元的第一发送时刻的差值大于或等于第二预设时间的情况下，为所述光业务单元分配一次映射机会。
具体的，确定模块1104，设置为至少通过以下之一方法确定所述光业务单元的理论速率：根据光业务单元的基准速率和光业务单元的基准速率倍数确定所述光业务单元的理论速率；根据光业务单元的客户业务理论速率和映射比例系数确定所述光业务单元的理论速率，其中，所述映射比例系数用于指示所述光业务单元的帧长与净荷长度的比值。
也就是说，所述第二预设时间对应的光业务单元的理论速率可以由预设的光业务单元基准速率与基准速率倍数的乘积确定；所述第二预设时间对应的光业务单元的理论速率也可以根据客户业务理论速率乘以所述光业务单元的帧长与光业务单元的净荷长度的比值直接计算，需要说明的是，计算接收光业务单元一帧数据所需要的最短时间需要考虑频偏的影响，也就是说，光业务单元速率＝光业务单元的理论速率*光业务单元的业务频偏系数。光业务单元的业务频偏系数＝(1+业务频偏容限)。举例来讲，光业务单元的帧长为192字节，光业务单元的净荷长度为185字节，在光业务单元的数据将净荷填满的情况下，映射比例系数为192/185，需要说明的是，不同的映射方法映射比例系数不同，本公开实施例对此不做限定。
在一个示例性实施例中，图14是根据本公开实施例的光业务单元的映射装置的结构框图(二)，如图14所示，该装置还包括：写入模块1106，设置为当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存，其中，所述第一缓存用于存储接收到的光业务单元数据，所述第二缓存用于存储预定发送顺序的光业务单元数据，所述第二缓存为一个或不同优先级的多个缓存。
也就是说，在接收到光业务单元数据的情况下，将光业务单元数据存储至第一缓存，在特定时机，将光业务单元对应第一缓存中的一帧数据写入到第二缓存；判断是否将光业务单元对应第一缓存中的一帧数据写入到第二缓存，需要确定光业务单元的是否具有发送机会，在光业务单元具有发送机会的情况下，将光业务单元对应第一缓存中的一帧数据写入到第二缓存；在光业务单元不具有发送机会的情况下，禁止将光业务单元对应第一缓存中的一帧数据写入到第二缓存。
在一个示例性实施例中，确定模块1104，还设置为在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定当前时间是否到达或超过第一发送时刻；在确定到达或超过所述第一发送时刻时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间。
具体的，为所述光业务单元设置周期性的定时器，当所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过所述第一发送时刻，将所述发送机会对应的许可标识更新为许可，并重置定时器，自动启动下一周期计时；确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定所述发送机会对应的许可标识，其中，在所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会对应的许可标识。
换言之，启动一个定时器，在定时器超时的情况下，将所述发送机会对应的许可标识更新为许可，在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下， 且所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会许可标识；需要说明的是，每次经过第二预设时间后重置定时器，为所述光业务单元分配发送机会之后，再次确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度，在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，且所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会许可标识，直至第一缓存中没有光业务单元数据。
在一个示例性实施例中，确定模块1104，还设置为在确定到达或超过第一发送时刻的情况下，确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；当确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间；当确定所述第一缓存中接收到的光业务单元比特数小于一个光业务单元帧的长度时，等待下一个第一发送时刻。
具体的，为所述光业务单元设置周期性的定时器，在所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过第一发送时刻，将所述发送机会对应的许可标识更新为许可，并重置定时器，自动启动下一周期计时；在确定所述发送机会对应的许可标识为许可的情况下，清除所述发送机会对应的许可标识，并确定所述第一缓存中接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；在确定所述第一缓存中接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，为所述光业务单元分配发送机会。
也就是说，在此方式中，通过所述定时器的计时时间等于或大于第二预设时间，确定是否到达或超过第一发送时刻，在确定到达或超过第一发送时刻的情况下，再确定所述第一缓存中接收到的光业务单元比特数是否大于或等于光业务单元帧的长度；确定第一缓存中接收到的光业务单元数据大于或等于一个光业务单元帧的长度的情况下，为所述光业务单元分配发送机会，需要说明的是，每次经过第二预设时间后重置定时器，在为所述光业务单元分配发送机会之后，再次确定到达或超过第一发送时刻，且第一缓存中接收到的第二光业务单元比特数大于或等于光业务单元帧的长度的情况下，为所述第二光业务单元分配发送机会，直至直至第一缓存中没有光业务单元数据。
在一个示例性实施例中，写入模块1106，还设置为依次查询所有光业务单元，确定当前光业务单元是否具有所述发送机会；在确定当前光业务单元具有所述发送机会的情况下，则将所述当前光业务单元的一帧数据从所述第一缓存中写入所述光业务单元对应的第二缓存；在确定当前光业务单元不具有所述发送机会的情况下，则查询下一个光业务单元。
也就是说，逐一轮询判定第一缓存中是否具有发送机会的光业务单元，如果具有发送机会的光业务单元的帧数据，将光业务单元的一帧数据写入到第二缓存，再确定光业务单元不具有所述发送机会的情况下，则查询下一个光业务单元。
在一个示例性实施例中，写入模块1106，还设置为当多个光业务单元具有发送机会时，根据预设的第一优先级策略确定多个光业务单元的调度顺序，并按调度顺序将所述多个光业务单元中的数据写入到所述第二缓存，其中，所述第一优先级策略包括：固定顺序轮询、业务类型优先级排序、缓存深度排序、业务编号排序。
在一个示例性实施例中，写入模块1106，还设置为独立确定多个光业务单元中具有发送机会的目标光业务单元；将所述目标光业务单元根据第二优先级策略对目标光业务单元进行排序，得到排序后的目标光业务单元序列，其中，所述第二优先级策略至少包括以下之一： 业务类型优先级、缓存深度、业务编号；根据排序后的目标光业务单元序列将所述目标光业务单元的数据依次写入所述目标光业务单元对应的第二缓存。
具体的，各个光业务单元独立处理的情况下，确定各个光业务单元是否具有发送机会，如果存在多个具有发送机会的光业务单元的情况下，则按业务类型优先级、缓存深度、业务编号等第二优先级策略对光业务单元进行排序，根据排序后的顺序将多个具有发送机会的光业务单元的数据一一写入第二缓存。
在一个示例性实施例中，映射模块1102，还设置为在第二缓存为不同优先级的多个缓存的情况下，根据预设调度策略确定所述多个光业务单元对应的不同第二缓存，所述预设调度策略至少包括以下之一：业务类型优先级、缓存深度、人工指定优先级、业务编号。
上述实施例中，在多个第二缓存的优先级不同的情况下，将所述多个具有发送机会的光业务单元按照第二预设优先级策略进行排序，将排序后的多个具有发送机会的光业务单元写入对应的优先级的第二缓存中。
在一个示例性实施例中，映射模块1102，还设置为在所述第二缓存为一个缓存的情况下，每间隔第一预设时间，从所述第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中；在第二缓存为不同优先级的多个缓存的情况下，每间隔第一预设时间，根据优先级从多个所述第二缓存中确定目标第二缓存，从所述目标第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中。
也就是说，在所述第二缓存为一个缓存的情况下，根据第一预设时间将光业务单元映射到光净荷单元的净荷块中，包括：确定最先转移到第二缓存中的目标光业务单元；将所述目标光业务单元映射到光净荷单元的净荷块中；在第二缓存为不同优先级的多个缓存的情况下，首先确定优先级最高的第二缓存，将优先级最高的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，在所述优先级最高的第二缓存中没有光业务单元的数据的情况下，将优先级第二最高的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，或者确定优先级最高的且具有数据的第二缓存，将优先级最高的且具有数据的第二缓存作为目标第二缓存，将目标第二缓存中的光业务单元的一帧数据映射到净荷块中，在优先级最高且有数据的第二缓存中没有光业务单元数据的情况下，确定优先级第二最高且有数据的第二缓存，将在优先级第二最高且有数据的第二缓存中的光业务单元的一帧数据映射到净荷块中。
在另一示例性实施例中，根据光净荷单元帧结构定义、帧起始时间点、已经传输的净荷块个数和第一预设时间，确定光净荷单元中当前的速率和帧头位置确定光净荷单元中当前净荷块的位置映射时间点；在到达当前净荷块的映射时间点，且在所述第二缓存中存在光业务单元数据的情况下，将第二缓存中的光业务单元一帧数据映射到当前净荷块中。
在一个示例性实施例中，映射模块1102，还设置为在所述光净荷单元的业务速率变更的情况下，获取变更后的业务速率；根据所述变更后的业务速率，计算第三预设时间，并将所述第一预设时间调整至所述第三预设时间。
当执行光净荷单元的业务速率变更时，例如：执行ODUFlex无损带宽调整，光净荷单元的业务速率发送变更，光净荷单元帧的发送速率变更，计算第三预设时间，并将所述第一预设时间调整至所述第三预设时间。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以 下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
本公开的实施例还提供了一种存储介质，该存储介质中存储有计算机程序，其中，该计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的计算机程序：
S12，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。
本公开的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
可选地，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。
可选地，在本实施例中，上述处理器可以被设置为通过计算机程序执行以下步骤：
S22，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。
以上所述仅为本公开的优选实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (17)

  1. 一种光业务单元的映射方法，包括：
    根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
  2. 根据权利要求1所述的方法，其中，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中之前，所述方法还包括：
    根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会，其中，所述第二预设时间为根据光业务单元的理论速率计算接收光业务单元一帧数据所需要的最短时间。
  3. 根据权利要求2所述的方法，其中，根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会，所述方法还包括：
    当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存，其中，所述第一缓存用于存储接收到的光业务单元数据，所述第二缓存用于存储预定发送顺序的光业务单元数据，所述第二缓存为一个或不同优先级的多个缓存。
  4. 根据权利要求2所述的方法，其中，所述第二预设时间为根据光业务单元的理论速率计算接收光业务单元一帧数据所需要的最短时间，包括：
    至少通过以下之一方法确定所述光业务单元的理论速率：
    根据光业务单元的基准速率和光业务单元的基准速率倍数确定所述光业务单元的理论速率；
    根据光业务单元的客户业务理论速率和映射比例系数确定所述光业务单元的理论速率，其中，所述映射比例系数用于指示所述光业务单元的帧长与光业务单元中固定的净荷长度的比值。
  5. 根据权利要求2所述的方法，其中，根据第二预设时间和接收到的光业务单元比特数确定光业务单元的发送机会，包括：
    在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定当前时间是否到达或超过第一发送时刻；
    在确定到达或超过所述第一发送时刻时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间。
  6. 根据权利要求5所述的方法，其中，在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定当前时间是否到达或超过第一发送时刻，包括：
    为所述光业务单元设置周期性的定时器，当所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过所述第一发送时刻，将所述发送机会对应的许可标识更新为 许可，并重置定时器，自动启动下一周期计时；
    确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；
    在确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，确定所述发送机会对应的许可标识，其中，在所述发送机会对应的许可标识为许可的情况下，为所述光业务单元分配发送机会，并清除发送机会对应的许可标识。
  7. 根据权利要求2所述的方法，其中，根据第二预设时间和接收到的光业务单元比特数确定光业务单元的映射机会，包括：
    在确定到达或超过第一发送时刻的情况下，确定接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；
    当确定接收到的光业务单元比特数大于等于一个光业务单元帧的长度时，为所述光业务单元分配发送机会，其中，相邻两个第一发送时刻的时间间隔为第二预设时间；
    当确定所述第一缓存中接收到的光业务单元比特数小于一个光业务单元帧的长度时，等待下一个第一发送时刻。
  8. 根据权利要求7所述的方法，其中，在确定到达或超过第一发送时刻的情况下，确定所述第一缓存中接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度之前，所述方法还包括：
    为所述光业务单元设置周期性的定时器，在所述定时器的计时时间等于或大于第二预设时间的情况下，确定到达或超过第一发送时刻，将所述发送机会对应的许可标识更新为许可，并重置定时器，自动启动下一周期计时；
    在确定所述发送机会对应的许可标识为许可的情况下，清除所述发送机会对应的许可标识，并确定所述第一缓存中接收到的光业务单元比特数是否大于等于一个光业务单元帧的长度；
    在确定所述第一缓存中接收到的光业务单元比特数大于等于一个光业务单元帧的长度的情况下，为所述光业务单元分配发送机会。
  9. 根据权利要求3所述的方法，其中，当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存，包括：
    当多个光业务单元具有发送机会时，根据预设的第一优先级策略确定多个光业务单元的调度顺序，并按调度顺序将所述多个光业务单元中的数据写入到所述第二缓存，其中，所述第一优先级策略包括：固定顺序轮询、业务类型优先级排序、缓存深度排序、业务编号排序。
  10. 根据权利要求9所述的方法，其中，按调度顺序将所述多个光业务单元中的数据写入到所述第二缓存，包括：
    依次查询所有光业务单元，确定当前光业务单元是否具有所述发送机会；
    在确定当前光业务单元具有所述发送机会的情况下，则将所述当前光业务单元的一帧数据从所述第一缓存中写入所述光业务单元对应的第二缓存；
    在确定当前光业务单元不具有所述发送机会的情况下，则查询下一个光业务单元。
  11. 根据权利要求9所述的方法，其中，按调度顺序将所述多个光业务单元中的数据写入到所述第二缓存，包括：
    独立确定多个光业务单元中具有发送机会的目标光业务单元；
    将所述目标光业务单元根据第二优先级策略对目标光业务单元进行排序，得到排序后的目标光业务单元序列，其中，所述第二优先级策略至少包括以下之一：业务类型优先级、缓存深度、业务编号；
    根据排序后的目标光业务单元序列将所述目标光业务单元的数据依次写入所述目标光业务单元对应的第二缓存。
  12. 根据权利要求3所述的方法，其中，当光业务单元有发送机会时，将所述光业务单元对应第一缓存中的一帧数据写入到第二缓存，包括：
    在第二缓存为不同优先级的多个缓存的情况下，根据预设调度策略确定所述多个光业务单元对应的不同第二缓存，所述预设调度策略至少包括以下之一：业务类型优先级、缓存深度、人工指定优先级、业务编号。
  13. 根据权利要求1所述的方法，其中，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，包括：
    在所述第二缓存为一个缓存的情况下，每间隔第一预设时间，从所述第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中；
    在第二缓存为不同优先级的多个缓存的情况下，每间隔第一预设时间，根据优先级从多个所述第二缓存中确定目标第二缓存，从所述目标第二缓存中按照先入先出的规则，将所述光业务单元的一帧数据写入到所述光净荷单元的净荷块中。
  14. 根据权利要求1所述的方法，其中，根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，包括：
    在所述光净荷单元的业务速率变更的情况下，获取变更后的业务速率；
    根据所述变更后的业务速率，计算第三预设时间，并将所述第一预设时间调整至所述第三预设时间。
  15. 一种光业务单元的映射装置，包括：
    映射模块，设置为根据第一预设时间按照预定发送顺序将光业务单元映射到光净荷单元的净荷块中，其中，所述第一预设时间为所述光净荷单元中传输一个净荷块所需要的时间。
  16. 一种计算机可读的存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被设置为运行时执行所述权利要求1至14任一项中所述的方法。
  17. 一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为通过所述计算机程序执行所述权利要求1至14任一项中所述的方法。
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