WO2022016831A1 - 一种FlexE低速业务处理方法和装置 - Google Patents

一种FlexE低速业务处理方法和装置 Download PDF

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WO2022016831A1
WO2022016831A1 PCT/CN2021/070735 CN2021070735W WO2022016831A1 WO 2022016831 A1 WO2022016831 A1 WO 2022016831A1 CN 2021070735 W CN2021070735 W CN 2021070735W WO 2022016831 A1 WO2022016831 A1 WO 2022016831A1
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flexe
frame
divided
time slots
overhead
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PCT/CN2021/070735
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English (en)
French (fr)
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刘飞
张睿
海增强
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烽火通信科技股份有限公司
武汉飞思灵微电子技术有限公司
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Priority to BR112022025975A priority Critical patent/BR112022025975A2/pt
Publication of WO2022016831A1 publication Critical patent/WO2022016831A1/zh

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    • 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
    • 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
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers

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  • the invention relates to the field of transmission networks, in particular to a FlexE low-speed service processing method and device.
  • Ethernet technology has further developed.
  • network slicing provides an application basis for network slicing and ultra-low-latency forwarding for different services.
  • FlexE is widely recognized by operators. FlexE adds Shim layer time slot crossing to the original Ethernet frame structure, which greatly reduces the node delay of the bearer network; at the same time, the FlexE bandwidth is flexible and adjustable, which can realize the bundling function of large ports, effectively solving the previous network bandwidth upgrade. problem.
  • the time slot division of the FlexE protocol takes 5G as the smallest particle, and does not take into account the operator's demand for low-speed services.
  • a large number of IDLE code blocks can only be inserted into the 66b code stream, and there is a large amount of bandwidth. wasteful situation.
  • the present invention provides a FlexE low-speed service processing method, which can meet the operator's requirements for low-speed services and avoid a large amount of bandwidth waste.
  • a FlexE low-speed service processing method comprising the following steps:
  • the size of the minimum granular service to be carried determine the number of time slots to be divided into the FlexE frame, and divide multiple consecutive FlexE frames as a whole for time slot division, so that each divided time slot can carry one of the minimum granularity services.
  • granular services, and the total number of payload code blocks of multiple FlexE frames can be equally divided according to the number of time slots;
  • the customer service is mapped into the time slot of the FlexE frame and sent out through at least one physical channel.
  • the number of timeslots to be divided into the FlexE frame is determined according to the size of the minimum granular service to be carried, and multiple consecutive FlexE frames are divided into timeslots as a whole, so that each divided timeslot can be divided into multiple timeslots. Bearing one of the minimum granularity services, and making the total number of payload code blocks of multiple FlexE frames equally divided according to the number of time slots, specifically including:
  • n a/b, where n is a positive integer
  • M consecutive FlexE frames are divided into time slots as a group, and the value of m is the smallest positive integer that makes m*20460/n an integer.
  • the FlexE frame includes 20460 payload code blocks and 1 overhead code block, and 8 of the FlexE frames form a FlexE overhead frame, and the FlexE overhead frame can describe the Client Calendar of z time slots.
  • a and Client Calendar B, and FlexE overhead frames or 2 t FlexE overhead frames form a FlexE extended multiframe, where z is a positive integer, Indicates rounding up, and the value of t is such that 2 t is greater than and closest positive integer of .
  • the method further includes:
  • the FlexE Extend MFAS overhead is set by using the reserved field of the FlexE overhead frame, and the value of the FlexE Extend MFAS overhead is
  • Client Calendar A and Client Calendar B are used to describe the channel numbers of client services carried by time slots zk+1 ⁇ z(k+1), where
  • the method further includes:
  • Bundle c/b time slots with a/c interval for service interworking.
  • the size of the smallest particle service includes 2.5G, 1.25G, 1G, 500M, 100M, 10M or other particles based on demand.
  • the present invention provides a FlexE low-speed service processing device, which can meet the operator's requirements for low-speed services, and can avoid a situation of wasting a large amount of bandwidth.
  • a FlexE low-speed service processing device comprising:
  • the time slot division module is used to determine the number of time slots to be divided into the FlexE frame according to the size of the minimum granular service to be carried, and divide multiple consecutive FlexE frames as a whole for time slot division, so that each divided A time slot can carry one of the minimum granular services, and the total number of payload code blocks of a plurality of the FlexE frames can be equally divided according to the number of time slots;
  • a mapping module which is used for mapping client services into time slots of the FlexE frame and sending them out through at least one physical channel.
  • the time slot division module determines the number of time slots to be divided into the FlexE frame according to the size of the minimum granular service to be carried, and divides multiple consecutive FlexE frames as a whole for time slot division, so that the divided Each time slot of the FlexE frame can carry one of the minimum granular services, and the total number of payload blocks of the multiple FlexE frames can be equally divided according to the number of time slots, specifically including:
  • n a/b, where n is a positive integer
  • M consecutive FlexE frames are divided into time slots as a group, and the value of m is the smallest positive integer that makes m*20460/n an integer.
  • the FlexE frame includes 20460 payload code blocks and 1 overhead code block, and 8 of the FlexE frames form a FlexE overhead frame, and the FlexE overhead frame can describe the Client Calendar of z time slots.
  • a and Client Calendar B, and FlexE overhead frames or 2 t FlexE overhead frames form a FlexE extended multiframe, where z is a positive integer, Indicates rounding up, and the value of t is such that 2 t is greater than and closest positive integer of .
  • the time slot division module is further configured to:
  • the FlexE Extend MFAS overhead is set by using the reserved field of the FlexE overhead frame, and the value of the FlexE Extend MFAS overhead is
  • Client Calendar A and Client Calendar B are used to describe the channel numbers of client services carried by time slots zk+1 ⁇ z(k+1), where
  • mapping module is also used to:
  • Bundle c/b time slots with a/c interval for service interworking.
  • the size of the smallest particle service includes 2.5G, 1.25G, 1G, 500M, 100M, 10M or other particles based on demand.
  • the FlexE low-speed service processing method of the present invention determines the time slot rate of the FlexE frame to be divided according to the size of the minimum granular service to be carried, so as to divide the time slot of the FlexE frame, so that there is no bandwidth waste when the low-speed service is carried. .
  • Each FlexE instance supports some or all of the bG rate time slots to be bundled into one cG rate time slot, which realizes the compatibility of time slots.
  • FIG. 1 is a flowchart of a FlexE low-speed service processing method in an embodiment of the present invention
  • Fig. 2 is the flow chart of step S1 in the embodiment of the present invention.
  • FIG. 3 is a structural diagram of a 1G time slot in an embodiment of the present invention.
  • FIG. 4 is a structural diagram of a 1.25G time slot in an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a FlexE overhead frame in an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of crossover of time slots of different rates in an embodiment of the present invention.
  • an embodiment of the present invention provides a FlexE low-speed service processing method, and the method includes the following steps:
  • the existing FlexE protocol uses 5G as the smallest particle for the division of time slots, and does not take into account the operator's demand for low-speed services. For example, the problem of carrying 10M services or low-rate services such as GE is not considered, but carrying 10M services in one 5G time slot, or carrying 1.25G GE signals in one 5G time slot, will result in very low bandwidth utilization.
  • the time slot rate of the FlexE frame is determined based on the size of the smallest granular service to be carried. For example, for a 10M service, the FlexE frame in this embodiment will be divided at a time slot rate of 10M. For the GE service, the FlexE frame in this embodiment will be divided at a time slot rate of 1.25G, so as to solve the problem of bandwidth utilization.
  • the size of the minimum granular service in this embodiment may be 2.5G, 1.25G, 1G, 500M, 100M or 10M, or may be other sizes based on operator requirements.
  • the FlexE frame since the FlexE frame includes 20460 payload code blocks and 1 overhead code block, when the FlexE frame is divided into time slots according to the minimum granular services that need to be carried, each position of the time slot of the FlexE instance cannot be Divide the 20460 position questions equally. For example, as shown in Figure 3, when the divided timeslots are 1G, taking 100G FlexE instance as an example, the 20460 positions cannot be equally divided into 100 1G timeslots, and finally 60 additional 66b blocks cannot be transmitted. However, in order to ensure the fixed positions of these time slots, the traditional method is to not divide the time slots for these 60 code blocks, which will also result in a large amount of bandwidth waste.
  • the method adopted in this embodiment is:
  • the time slot division is performed as a group.
  • the time slot corresponding to the boundary of the first FlexE frame is 60.
  • the second FlexE frame in this embodiment starts from the time slot. 61, that is, the number of the last time slot immediately following the previous FlexE frame.
  • 5 FlexE frames can just determine the 1G time slot boundary, so the 1G time slot is divided by a group of 5 FlexE frames, so that all code blocks can be divided into time slots, that is, in the FlexE frame There are no padding blocks that the device cannot parse, avoiding a lot of wasted bandwidth.
  • the FlexE frame includes 20460 payload code blocks and 1 overhead code block, and 8 FlexE frames form a FlexE overhead frame, and the FlexE overhead frame can describe Client Calendar A and Client Calendar B of z time slots ,and FlexE overhead frames or 2 t FlexE overhead frames form a FlexE extended multiframe, where z is a positive integer, Indicates rounding up, and the value of t is such that 2 t is greater than and closest positive integer of .
  • the existing FlexE overhead multiframe includes 32 overhead frames.
  • the FlexE frame is divided based on the size of the smallest granular service to be carried, the FlexE overhead multiframe needs to be divided into time slots.
  • the extended FlexE extended multiframe will be or 2 t FlexE overhead frames.
  • Client Calendar (client calendar) A and Client Calendar B are mainly used to describe the correspondence between FlexE clients and time slots.
  • the FlexE Extend MFAS overhead is set by using the reserved field of the value
  • Client Calendar A and Client Calendar B are used to describe the channel numbers of client services carried by time slots zk+1 ⁇ z(k+1), where
  • the FlexE overhead frame can describe Client Calendar A and Client Calendar B of z time slots, at least FlexE overhead frames, the FlexE Extend MFAS must have value, that is After each overhead frame is transmitted, the FlexE Extend MFAS is incremented by 1.
  • each FlexE overhead frame can describe Client Calendar A and Client Calendar B of one time slot, at least FlexE overhead frames form a FlexE extended multiframe. It can be understood that 100 is the required number in this case, and more than 100 is acceptable.
  • each FlexE overhead frame can describe Client Calendar A and Client Calendar B of 3 time slots, then at least The FlexE overhead frames form a FlexE extended multiframe, and other cases can be deduced by analogy, which is not repeated here.
  • the reserved field bit17:30 of the second 66b block of the FlexE overhead frame is used to define the FlexE Extend MFAS overhead.
  • the FlexE frame can be satisfied.
  • the time slot division is performed at a rate of 10Mbit/s.
  • the current timeslot service is mainly The bundling is realized by interworking with the time slot rate supported by the peer device.
  • Timeslot rate c/b Calculate the number of timeslots c/b to be bundled according to the current timeslot rate b and the timeslot rate c to be communicated. It can be understood that the timeslot rate c to be communicated here can be 5Gbit/s or other rates.
  • Bundle c/b time slots with a/c interval for service interworking.
  • 1G time slot i is exactly in the first 5G time slot i in the FlexE frame
  • the position of 1G time slot i+10 in the FlexE frame is exactly in the second 5G time slot.
  • 1G time slot i+20 is located in the 3rd 5G time slot i in the FlexE frame
  • 1G time slot i+30 is located in the 4th 5G time slot i in the FlexE frame
  • 1G time slot i+40 The position is exactly in the fifth 5G time slot i in the FlexE frame.
  • the FlexE network device on the sending side uses the bound 1G time slots i, i+10, i+20, i+30, i+40, time slots j, j+10, j+ 20, j+30, j+40, time slots p, p+10, p+20, p+30, p+40, time slots q, q+10, q+20, q+30, q+40 transmission
  • configure FlexE network equipment on the receiving side to demap services from 5G time slots i, j, p, and q.
  • the FlexE network device A After the FlexE network device A completes the time slot division, it extracts the bG time slot FlexE instance from the physical layer interfaces #1-m1, and the Shim layer receiving circuit completes the demapping of the customer service from the bG time slot FlexE instance.
  • the Shim layer receiving circuit of FlexE network device A crosses the client service on the receiving side to the client service on the sending side, and adapts to the rate of the client service on the sending side.
  • the Shim layer sending circuit of FlexE network device A bundles bG time slots into cG time slots, and then FlexE network device A maps customer services to the bundled cG time slots, and then maps the FlexE instance to physical layer interfaces #1 ⁇ Sending side of m2, and output to physical layer interfaces #1 to m2 of FlexE network device B.
  • FlexE network device B sends FlexE data to physical layer interfaces #1 to m3 of FlexE network device C through physical layer interfaces #1 to m3. After FlexE network device C completes the time slot division, it bundles bG time slots into cG time slots. Then FlexE network device C extracts the cG time slot FlexE instance from the physical layer interface #1 ⁇ m3, and the receiving circuit of the Shim layer completes the demapping of the customer service from the cG time slot FlexE instance.
  • the Shim layer circuit of the FlexE network device C crosses the FlexE client on the receiving side to the FlexE client on the sending side, and adapts to the rate of the FlexE client on the sending side;
  • FlexE network device C The Shim layer sending circuit maps customer services to bG time slots, and then FlexE network device C maps the FlexE instance to the sending side of physical layer interfaces #1 to m4.
  • the cG time slot in the above may be a 5G time slot.
  • the embodiment of the present invention also provides a FlexE low-speed service processing device, which includes a time slot division module and a mapping module.
  • the time slot division module is used to determine the number of time slots to be divided into the FlexE frame according to the size of the minimum granular service to be carried, and divide the time slots of multiple consecutive FlexE frames as a whole, so that each divided FlexE frame is divided into time slots.
  • a time slot can carry a minimum granularity service, and the total number of payload code blocks of multiple FlexE frames can be equally divided according to the number of time slots.
  • the mapping module is used to map the customer service into the time slot of the FlexE frame, and send it out through at least one physical channel.
  • the time slot division module determines the number of time slots to be divided into the FlexE frame according to the size of the minimum granular service to be carried, and divides the time slots of multiple consecutive FlexE frames as a whole, so that each time slot after division is A slot can carry a minimum granularity service, and the total number of payload blocks of multiple FlexE frames can be equally divided according to the number of time slots, including:
  • n a/b, where n is a positive integer
  • M consecutive FlexE frames are divided into time slots as a group, and the value of m is the smallest positive integer that makes m*20460/n an integer.
  • the FlexE frame includes 20460 payload code blocks and 1 overhead code block, and 8 FlexE frames form a FlexE overhead frame, and the FlexE overhead frame can describe Client Calendar A and Client Calendar B of z time slots, and FlexE overhead frames or 2 t FlexE overhead frames form a FlexE extended multiframe, where z is a positive integer, Indicates rounding up, and the value of t is such that 2 t is greater than and closest positive integer of .
  • time slot division module is also used for:
  • Client Calendar A and Client Calendar B are used to describe the channel numbers of client services carried by time slots zk+1 ⁇ z(k+1), where
  • mapping module is also used to:
  • Bundle c/b time slots with a/c interval for service interworking.
  • the size of the smallest particle service includes 2.5G, 1.25G, 1G, 500M, 100M, 10M or other particles based on demand.

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Abstract

本发明公开了一种FlexE低速业务处理方法和装置，涉及传输网络领域，该方法包括：根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分。将客户业务映射到FlexE帧的时隙中，并通过至少一条物理通道发送出去。本发明中的FlexE低速业务处理方法能满足运营商对于低速业务的需求，且能避免大量带宽浪费的情况。

Description

一种FlexE低速业务处理方法和装置 技术领域
本发明涉及传输网络领域，具体涉及一种FlexE低速业务处理方法和装置。
背景技术
随着5G时代到来，以太网技术进一步发展。网络切片作为5G承载方案的关键技术之一，为不同业务实现网络分片和超低时延转发提供了应用基础。FlexE作为以太网切片的核心技术，受到运营商广泛认可。FlexE在原有的以太网帧结构中增加了Shim层时隙交叉，大幅降低了承载网络的节点时延；同时FlexE带宽灵活可调，能够实现大端口的捆绑功能，有效解决之前网络带宽升级面临的问题。
FlexE协议对于时隙的划分以5G为最小颗粒，没有考虑到运营商对于低速业务的需求，为了在5G时隙中承载低速业务，只能在66b码流中插入大量IDLE码块，存在大量带宽浪费的情况。
发明内容
针对现有技术中存在的缺陷，第一方面，本发明的提供一种FlexE低速业务处理方法，其能满足运营商对于低速业务的需求，且能避免大量带宽浪费的情况。
为达到以上目的，本发明采取的技术方案是：
一种FlexE低速业务处理方法，该方法包括以下步骤：
根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划 分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分；
将客户业务映射到FlexE帧的时隙中，并通过至少一条物理通道发送出去。
一些实施例中，根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分，具体包括：
根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
一些实施例中，所述FlexE帧包括20460个净荷码块和1个开销码块，且8个所述FlexE帧组成一个FlexE开销帧，所述FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B，且
Figure PCTCN2021070735-appb-000001
个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
Figure PCTCN2021070735-appb-000002
表示向上取整，t的取值为使2 t大于
Figure PCTCN2021070735-appb-000003
且最靠近
Figure PCTCN2021070735-appb-000004
的正整数。
一些实施例中，所述方法还包括：
利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，所述FlexE Extend MFAS开销的取值为
Figure PCTCN2021070735-appb-000005
当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar  B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
Figure PCTCN2021070735-appb-000006
Figure PCTCN2021070735-appb-000007
一些实施例中，所述方法还包括：
当需要进行业务互通时，根据当前的时隙速率b和待互通的时隙速率c，计算需要捆绑的时隙个数c/b；
根据FlexE instance的传输速率a和待互通的时隙速率c，计算需要捆绑的相邻两个时隙的间距a/c；
将c/b个间距为a/c的时隙进行捆绑以进行业务互通。
一些实施例中，所述最小颗粒业务的大小包括2.5G、1.25G、1G、500M、100M、10M或基于需求的其他颗粒。
第二方面，本发明的提供一种FlexE低速业务处理装置，其能满足运营商对于低速业务的需求，且能避免大量带宽浪费的情况。
为达到以上目的，本发明采取的技术方案是：
一种FlexE低速业务处理装置，包括：
时隙划分模块，其用于根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分；
映射模块，其用于将客户业务映射到FlexE帧的时隙中，并通过至少一条物理通道发送出去。
一些实施例中，所述时隙划分模块根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数 量进行均分，具体包括：
根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
一些实施例中，所述FlexE帧包括20460个净荷码块和1个开销码块，且8个所述FlexE帧组成一个FlexE开销帧，所述FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B，且
Figure PCTCN2021070735-appb-000008
个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
Figure PCTCN2021070735-appb-000009
表示向上取整，t的取值为使2 t大于
Figure PCTCN2021070735-appb-000010
且最靠近
Figure PCTCN2021070735-appb-000011
的正整数。
一些实施例中，所述时隙划分模块还用于：
利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，所述FlexE Extend MFAS开销的取值为
Figure PCTCN2021070735-appb-000012
当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
Figure PCTCN2021070735-appb-000013
Figure PCTCN2021070735-appb-000014
一些实施例中，所述映射模块还用于：
当需要进行业务互通时，根据当前的时隙速率b和待互通的时隙速率c，计算需要捆绑的时隙个数c/b；
根据FlexE instance的传输速率a和待互通的时隙速率c，计算需要捆绑的相邻两个时隙的间距a/c；
将c/b个间距为a/c的时隙进行捆绑以进行业务互通。
一些实施例中，所述最小颗粒业务的大小包括2.5G、1.25G、1G、500M、100M、10M或基于需求的其他颗粒。
与现有技术相比，本发明的优点在于：
本发明的FlexE低速业务处理方法，其根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率以对FlexE帧进行时隙划分，从而在承载低速业务时不存在带宽浪费情况。每个FlexE instance支持部分或全部b G速率时隙捆绑成1个cG速率时隙使用，即实现了时隙的兼容。
附图说明
图1为本发明实施例中FlexE低速业务处理方法的流程图；
图2为本发明实施例中步骤S1的的流程图；
图3为本发明实施例中1G时隙结构图；
图4为本发明实施例中1.25G时隙结构图；
图5为本发明实施例中FlexE开销帧的结构示意图；
图6本发明实施例中不同速率时隙交叉示意图。
具体实施方式
以下结合附图及实施例对本发明作进一步详细说明。
参见图1所示，本发明实施例提供一种FlexE低速业务处理方法，该方法包括以下步骤：
S1.根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个最小颗粒业务，并使多个FlexE帧的净荷码块总数可按时隙数量进行均分。
S2.将客户业务映射到FlexE帧的时隙中，并通过至少一条物理 通道发送出去。
现有的FlexE协议对于时隙的划分以5G为最小颗粒，没有考虑到运营商对于低速业务的需求。比如未考虑承载10M业务或GE等低速率业务的问题，而在一个5G时隙中承载10M的业务，或在一个5G时隙中承载1.25G的GE信号，将会导致带宽利用率非常低。
而在本实施例中，FlexE帧的时隙速率是基于需要承载的最小颗粒业务的大小来确定的，比如针对10M业务，本实施例的FlexE帧将会以10M的时隙速率来进行划分。针对GE业务，本实施例的FlexE帧将会以1.25G的时隙速率来进行划分，从而来解决带宽利用率的问题。
可以理解的是，本实施例中的最小颗粒业务的大小可以是2.5G、1.25G、1G、500M、100M或10M，也可以是基于运营商需求的其他大小。
此外，由于FlexE帧包括20460个净荷码块和1个开销码块，，当根据需要承载的最小颗粒业务来对FlexE帧进行时隙划分时，会出现FlexE instance的时隙的每个位置不能均分这20460个位置的问题。比如，参见图3所示，当划分的时隙为1G时，以100G FlexE instance为例，这20460个位置不能为100个1G的时隙均分，最后会多出60个66b块不能传输，而为了保证这些时隙的固定位置，传统的方式是将这60个码块不进行时隙的划分，这样也会存在大量带宽浪费的情况。
参见图2所示，为了解决上述问题，作为一个较好的实施方式，在本实施例中采用的方式为：
S11.根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
S12.根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
S13.将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
具体而言，如果需要承载的最小颗粒业务的大小为1G，则此时需要划分的FlexE帧的时隙速率b为1Gbit/s，若FlexE instance的传输速率a为100Gbit/s，则需要划分的时隙数量n＝a/b＝100，此时若需要使m*20460/n为整数，可以知道m的最小值为5，也就是说，本实施例中将会以5个连续的FlexE帧作为一组进行时隙划分。
为便于理解，参见图3所示，可知第一个FlexE帧的边界对应的时隙是60，为了能够让所有码块进行时隙的划分，本实施例中的第二个FlexE帧从时隙61开始，即紧接上一个FlexE帧的最后一个时隙编号。从图3可以知道5个FlexE帧恰好可以帧确定1G时隙边界，故对于1G的时隙采用5个FlexE帧一组进行划分，从而可以让所有码块进行时隙的划分，即FlexE帧中不存在设备无法解析的填充码块，避免了大量带宽浪费的情况。
同理参见图4所示，可以理解的是，如果需要承载的最小颗粒业务的大小为1.25G，则此时需要划分的FlexE帧的时隙速率b为1.25Gbit/s，若FlexE instance的传输速率a为100Gbit/s，则需要划分的时隙数量n＝a/b＝80，此时若需要使m*20460/n为整数，可以知道m的最小值为4，也就是说，此时将会以4个连续的FlexE帧作为一组进行时隙划分。对于其它情况下的时隙速率和FlexE instance的传输速率，可以根据上述方式对应确定，在此不再赘述。
在本实施例中，FlexE帧包括20460个净荷码块和1个开销码块，且8个FlexE帧组成一个FlexE开销帧，FlexE开销帧可描述z个时 隙的Client Calendar A与Client Calendar B，且
Figure PCTCN2021070735-appb-000015
个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
Figure PCTCN2021070735-appb-000016
表示向上取整，t的取值为使2 t大于
Figure PCTCN2021070735-appb-000017
且最靠近
Figure PCTCN2021070735-appb-000018
的正整数。
值得一提的是，现有的FlexE开销复帧包括32个开销帧，本实施例中由于是基于需要承载的最小颗粒业务的大小来对FlexE帧进行时隙划分，需要对FlexE开销复帧进行扩展，扩展后的FlexE扩展复帧将会由
Figure PCTCN2021070735-appb-000019
个或者2 t个FlexE开销帧组成。
Client Calendar(客户日程表)A与Client Calendar B主要是用于描述FlexE客户和时隙的对应关系，在本实施例中，利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，FlexE Extend MFAS开销的取值为
Figure PCTCN2021070735-appb-000020
当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
Figure PCTCN2021070735-appb-000021
Figure PCTCN2021070735-appb-000022
也就是说，当需要定义n个时隙，且FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B时，此时需要至少
Figure PCTCN2021070735-appb-000023
个FlexE开销帧，则FlexE Extend MFAS必须有
Figure PCTCN2021070735-appb-000024
个取值，即
Figure PCTCN2021070735-appb-000025
Figure PCTCN2021070735-appb-000026
每传输完一个开销帧，FlexE Extend MFAS加1。
具体而言，当n＝100时，此时需要定义100个时隙，若每个FlexE开销帧可描述1个时隙的Client Calendar A与Client Calendar B，那么至少需要
Figure PCTCN2021070735-appb-000027
个FlexE开销帧组成一个FlexE扩展复帧，可以理解的是该种情形下100是必须需要的数量，大于100也是可以的，对于机器语言来说，一个FlexE扩展复帧包括的FlexE开销帧为2的幂次方更佳，比如可以是2 7＝128个FlexE开销帧来组成一个FlexE 扩展复帧。
同理，当n＝100时，若每个FlexE开销帧可描述3个时隙的Client Calendar A与Client Calendar B，那么至少需要
Figure PCTCN2021070735-appb-000028
个FlexE开销帧组成一个FlexE扩展复帧，对于其余情况可以以此类推，在此不在赘述。
作为一个优选地实施方式，参见图5所示，在本实施例中，利用FlexE开销帧第2个66b块的保留字段bit17:30定义了FlexE Extend MFAS开销，在这种情况下可以满足FlexE帧以10Mbit/s的速率进行时隙划分。
此外，基于兼容性方面的考虑，比如为了实现对既有FlexE协议中的5G速率时隙的兼容，实现当前时隙业务交叉至5G时隙业务，在本实施例中主要是通过对当前时隙进行捆绑以和对端设备支持的时隙速率互通来实现的。
在本实施例中，具体方式如下：
根据当前的时隙速率b和待互通的时隙速率c，计算需要捆绑的时隙个数c/b，可以理解的是这里需要互通时隙速率c可以是5Gbit/s或者是其它速率。
根据FlexE instance的传输速率a和待互通的时隙速率c，计算需要捆绑的相邻两个时隙的间距a/c。
将c/b个间距为a/c的时隙进行捆绑以进行业务互通。
以50G FlexE instance和1G时隙为例，若此时需要和5G时隙业务进行互通，可知需要捆绑5个1G时隙，然后基于FlexE instance的传输速率a和待互通的时隙速率c，可知需要捆绑的相邻两个时隙的间距为10。然后就可以将5个间距为10的1G时隙捆绑以进行业务互通。
其原因在于：以1G时隙i为例，1G时隙i在FlexE帧中位置正好位于第1个5G时隙i，1G时隙i+10在FlexE帧中位置正好位于第2个5G时隙i，1G时隙i+20在FlexE帧中位置正好位于第3个5G时隙i，1G时隙i+30在FlexE帧中位置正好位于第4个5G时隙i，1G时隙i+40在FlexE帧中位置正好位于第5个5G时隙i。
也就是说，在实际应用当中，发送侧的FlexE网络设备使用绑定的1G时隙i、i+10、i+20、i+30、i+40，时隙j、j+10、j+20、j+30、j+40，时隙p、p+10、p+20、p+30、p+40，时隙q、q+10、q+20、q+30、q+40发送业务，在接收侧配置FlexE网络设备从5G时隙i、j、p、q中解映射出业务。
值得指出的是，本实施例中支持部分或全部1G时隙绑定成5G时隙使用，即支持不同速率时隙在同一个FlexE instance共存。
下面通过一个具体的例子来做进一步描述：
参见图6所示，为了实现bG时隙承载业务交叉至cG时隙承载业务以及cG时隙承载业务交叉至bG时隙承载业务：
首先配置FlexE网络设备A接收侧物理层接口#1～m1工作在bG速率时隙模式，发送侧物理层接口#1～m2工作在bG速率时隙绑定模式(即cG时隙)。
接着配置FlexE网络设备C接收侧物理层接口#1～m3工作在bG速率时隙绑定模式，发送侧物理层接口#1～m4工作在bG速率时隙模式。
在FlexE网络设备A完成时隙划分后，从物理层接口#1～m1中提取bG时隙FlexE instance，Shim层接收电路完成从bG时隙FlexE instance中解映射出客户业务。
FlexE网络设备A的Shim层接收电路将接收侧客户业务交叉至 发送侧客户业务，并适配到发送侧客户业务的速率。
FlexE网络设备A的Shim层发送电路将bG时隙捆绑成cG时隙，再由FlexE网络设备A将客户业务映射到捆绑后的cG时隙中，再将FlexE instance映射到物理层接口#1～m2的发送侧，并输出给FlexE网络设备B的物理层接口#1～m2。
FlexE网络设备B通过物理层接口#1～m3将FlexE数据发送给FlexE网络设备C的物理层接口#1～m3，在FlexE网络设备C完成时隙划分后，再将bG时隙捆绑成cG时隙，然后FlexE网络设备C从物理层接口#1～m3中提取cG时隙FlexE instance，Shim层接收电路中完成从cG时隙FlexE instance中解映射出客户业务。
FlexE网络设备C的Shim层电路将接收侧FlexE client交叉至发送侧FlexE client，并适配到发送侧FlexE client速率；
FlexE网络设备C Shim层发送电路将客户业务映射到bG时隙中，再由FlexE网络设备C将FlexE instance映射到物理层接口#1～m4的发送侧。
可以理解的是，上述中的cG时隙可以是5G时隙。
本发明实施例还提供一种FlexE低速业务处理装置，其包括时隙划分模块和映射模块。
其中，时隙划分模块用于根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个最小颗粒业务，并使多个FlexE帧的净荷码块总数可按时隙数量进行均分。
映射模块用于将客户业务映射到FlexE帧的时隙中，并通过至少一条物理通道发送出去。
进一步地，时隙划分模块根据需要承载的最小颗粒业务的大小， 确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个最小颗粒业务，并使多个FlexE帧的净荷码块总数可按时隙数量进行均分，具体包括：
根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
进一步地，FlexE帧包括20460个净荷码块和1个开销码块，且8个FlexE帧组成一个FlexE开销帧，FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B，且
Figure PCTCN2021070735-appb-000029
个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
Figure PCTCN2021070735-appb-000030
表示向上取整，t的取值为使2 t大于
Figure PCTCN2021070735-appb-000031
且最靠近
Figure PCTCN2021070735-appb-000032
的正整数。
进一步地，时隙划分模块还用于：
利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，FlexE Extend MFAS开销的取值为
Figure PCTCN2021070735-appb-000033
当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
Figure PCTCN2021070735-appb-000034
Figure PCTCN2021070735-appb-000035
进一步地，映射模块还用于：
当需要进行业务互通时，根据当前的时隙速率b和待互通的时隙速率c，计算需要捆绑的时隙个数c/b；
根据FlexE instance的传输速率a和待互通的时隙速率c，计算需要捆绑的相邻两个时隙的间距a/c；
将c/b个间距为a/c的时隙进行捆绑以进行业务互通。
进一步地，最小颗粒业务的大小包括2.5G、1.25G、1G、500M、100M、10M或基于需求的其他颗粒。
本发明不局限于上述实施方式，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围之内。本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。

Claims (10)

  1. 一种FlexE低速业务处理方法，其特征在于，该方法包括以下步骤：
    根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分；
    将客户业务映射到FlexE帧的时隙中，并通过至少一条物理通道发送出去。
  2. 如权利要求1所述的FlexE低速业务处理方法，其特征在于：根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分，具体包括：
    根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
    根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
    将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
  3. 如权利要求2所述的FlexE低速业务处理方法，其特征在于：所述FlexE帧包括20460个净荷码块和1个开销码块，且8个所述FlexE帧组成一个FlexE开销帧，所述FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B，且
    Figure PCTCN2021070735-appb-100001
    个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
    Figure PCTCN2021070735-appb-100002
    表 示向上取整，t的取值为使2 t大于
    Figure PCTCN2021070735-appb-100003
    且最靠近
    Figure PCTCN2021070735-appb-100004
    的正整数。
  4. 如权利要求3所述的FlexE低速业务处理方法，其特征在于，所述方法还包括：
    利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，所述FlexE Extend MFAS开销的取值为
    Figure PCTCN2021070735-appb-100005
    当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
    Figure PCTCN2021070735-appb-100006
    Figure PCTCN2021070735-appb-100007
  5. 如权利要求2所述的FlexE低速业务处理方法，其特征在于，所述方法还包括：
    当需要进行业务互通时，根据当前的时隙速率b和待互通的时隙速率c，计算需要捆绑的时隙个数c/b；
    根据FlexE instance的传输速率a和待互通的时隙速率c，计算需要捆绑的相邻两个时隙的间距a/c；
    将c/b个间距为a/c的时隙进行捆绑以进行业务互通。
  6. 如权利要求1所述的FlexE低速业务处理方法，其特征在于，所述最小颗粒业务的大小包括2.5G、1.25G、1G、500M、100M、10M或基于需求的其他颗粒。
  7. 一种FlexE低速业务处理装置，其特征在于，包括：
    时隙划分模块，其用于根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分；
    映射模块，其用于将客户业务映射到FlexE帧的时隙中，并通过 至少一条物理通道发送出去。
  8. 如权利要求7所述的FlexE低速业务处理装置，其特征在于：所述时隙划分模块根据需要承载的最小颗粒业务的大小，确定FlexE帧需要划分的时隙数量，并把多个连续的FlexE帧作为整体进行时隙划分，以使划分后的每个时隙可承载一个所述最小颗粒业务，并使多个所述FlexE帧的净荷码块总数可按所述时隙数量进行均分，具体包括：
    根据需要承载的最小颗粒业务的大小，确定需要划分的FlexE帧的时隙速率b；
    根据FlexE instance的传输速率a和FlexE帧的时隙速率b，计算每个FlexE帧需要划分的时隙数量n＝a/b，其中n为正整数；
    将m个连续的FlexE帧作为一组进行时隙划分，m的取值为使m*20460/n为整数的最小正整数。
  9. 如权利要求8所述的FlexE低速业务处理方法，其特征在于：所述FlexE帧包括20460个净荷码块和1个开销码块，且8个所述FlexE帧组成一个FlexE开销帧，所述FlexE开销帧可描述z个时隙的Client Calendar A与Client Calendar B，且
    Figure PCTCN2021070735-appb-100008
    个FlexE开销帧或2 t个FlexE开销帧组成一个FlexE扩展复帧，其中z为正整数，
    Figure PCTCN2021070735-appb-100009
    表示向上取整，t的取值为使2 t大于
    Figure PCTCN2021070735-appb-100010
    且最靠近
    Figure PCTCN2021070735-appb-100011
    的正整数。
  10. 如权利要求9所述的FlexE低速业务处理装置，其特征在于，所述时隙划分模块还用于：
    利用FlexE开销帧保留字段的设置FlexE Extend MFAS开销，所述FlexE Extend MFAS开销的取值为
    Figure PCTCN2021070735-appb-100012
    当FlexE Extend MFAS＝k时，Client Calendar A与Client Calendar B用于描述时隙zk+1～z(k+1)承载的客户业务的通道号，其中
    Figure PCTCN2021070735-appb-100013
    Figure PCTCN2021070735-appb-100014
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