WO2018000894A1 - 一种发送和接收业务的方法、装置和网络系统 - Google Patents

一种发送和接收业务的方法、装置和网络系统 Download PDF

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Publication number
WO2018000894A1
WO2018000894A1 PCT/CN2017/080316 CN2017080316W WO2018000894A1 WO 2018000894 A1 WO2018000894 A1 WO 2018000894A1 CN 2017080316 W CN2017080316 W CN 2017080316W WO 2018000894 A1 WO2018000894 A1 WO 2018000894A1
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data stream
block
information block
information
free
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PCT/CN2017/080316
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English (en)
French (fr)
Inventor
钟其文
徐小飞
张小俊
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华为技术有限公司
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Priority to KR1020197002264A priority Critical patent/KR102226021B1/ko
Priority to EP17818891.8A priority patent/EP3468075B1/en
Priority to JP2018568914A priority patent/JP6736701B2/ja
Publication of WO2018000894A1 publication Critical patent/WO2018000894A1/zh
Priority to US16/236,845 priority patent/US10848344B2/en

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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
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • H04J3/1658—Optical Transport Network [OTN] carrying packets or ATM cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements
    • 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
    • H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0073—Services, e.g. multimedia, GOS, QOS
    • H04J2203/0082—Interaction of SDH with non-ATM protocols
    • H04J2203/0085—Support of Ethernet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
    • H04J2203/0091—Time slot assignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/07—Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates or bit rates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

Definitions

  • the present application relates to the field of communications, and in particular, to a method, an apparatus, and a network system for transmitting and receiving services.
  • Flexible Ethernet combines the technical features of Ethernet and transport networks (eg, Optical Transport Network (OTN), Synchronous Digital Hierarchy (SDH), etc.) An important milestone.
  • OTN Optical Transport Network
  • SDH Synchronous Digital Hierarchy
  • the Ethernet interface presents the characteristics of virtualization.
  • Multiple Ethernet physical interfaces are cascaded to support several virtual logical ports.
  • 100 Gigabit Ethernet (100 Gigabit Ethernet) physical interfaces are cascaded into a 400 Gigabit (400 Gigabit, 400 G) flexible Ethernet physical interface group that can support several logical ports.
  • the bandwidth of each logical port can be adjusted arbitrarily. All logical ports share the total bandwidth of four 100G physical interfaces. In this way, services of different bandwidths can be flexibly transmitted.
  • TDM Time Division Multiplex
  • a logical port can consist of several time slots.
  • the 400G flexible Ethernet physical interface group formed by cascading four 100GE physical interfaces as described above can be divided into 80 time slots of 5G granularity. Each service is individually allocated a number of time slots, wherein the allocated time slots are exclusive to a certain service.
  • three services C1, C2, and C3 are transmitted between the network devices Pa and Pb, and each service occupies a certain time slot bandwidth.
  • service C1 occupies two time slots, which cannot be shared by services C2, C3 or other services, as do services C2 and C3.
  • these services are lower-traffic packet services, such as lower-traffic Ethernet services, a large number of inter-packet gaps (IPGs) are transmitted between network devices in the time slots occupied by these services.
  • IPGs inter-packet gaps
  • Idle idle information
  • the idle information (Idle) does not actually carry the data information of the service, resulting in waste of time slot bandwidth resources.
  • the embodiments of the present invention provide a method, an apparatus, and a network system for transmitting and receiving services, which can solve the problem that the flexible Ethernet has a waste of time slot resources in the process of service transmission.
  • an embodiment of the present invention provides a method for sending a service, including: acquiring, by a network device, at least two data streams, where the at least two data streams include a first data stream and a second data stream; Inserting a data stream into the second data stream to generate a third data stream; the third data stream includes a first information block and a second information block, where the first information block and the second information block are Generating the second data stream; the first information block is configured to carry the first data stream; the second information block is configured to carry a first data stream distribution indication map, and the first data stream distribution indicates a map And configured to indicate a location of the first information block, where the second information block is identified by a preset map block type; and the third data stream is sent.
  • the first data stream is carried by the second data stream, thereby improving the utilization of the bandwidth.
  • the second data stream may be formed by a bandwidth exclusive service, and the first data stream may be BE (Best Effort, best effort).
  • BE Best Effort, best effort
  • the idle time slot resource of the second data stream can be used to implement statistical multiplexing of services in the flexible Ethernet.
  • the method further includes: acquiring the second data stream, identifying at least two free blocks of the second data stream, and generating the location at locations of the at least two free blocks The first information block and the second information block.
  • the free block in the second data stream is identified for carrying the first data stream and the first data stream distribution indication map, and fully utilizing the idle time slot resource.
  • other redundant information blocks such as ERROR blocks, may also be identified, further utilizing redundant time slot resources.
  • the generating the first information block and the second information block at the location of the at least two free blocks including: inserting the first data stream into the first information block; Generating the first data stream distribution indication map according to the location of the first information block, and inserting the first data stream distribution indication map into the second information block.
  • the first data stream may be first inserted into the first information block, and then the first data stream distribution indication map may be generated, or the first data stream distribution indication map may be formed, and then the first data stream is inserted into the first Information block.
  • the location of the first information block may be indicated by the first data flow distribution indication map, so that the receiving end device extracts the first data stream from the third data stream.
  • the identifying the at least two free blocks in the second data stream includes: acquiring a first segment data stream from the second data stream, and identifying the first region A free block in the segment data stream results in at least two free blocks, the free block carrying a free block type.
  • Performing segmentation processing on the second data stream can implement segmentation of the first data stream and reduce processing delay.
  • the method further includes: generating a free block distribution indication map, where the free block distribution indication map is used to indicate the at least two a location of the free block and/or the non-free block; generating the first data stream distribution indication map according to the free block distribution indication map.
  • the method further includes: acquiring a second segment data stream from the second data stream, and identifying at least two free blocks in the second segment data stream. Decoding the location of the at least two free blocks to generate the first information block and the second information block; indicating a location of the second segment data stream by using preset participation information.
  • the flexible insertion of the first data stream can be achieved by masking or the like indicating a location that can be used to insert the first data stream, or indicating that the location of the first data stream cannot be inserted.
  • the method further includes: adjusting a location where the second information block is located to a first location in the first segment data stream or the second segment data stream.
  • an embodiment of the present invention provides a method for receiving a service, including: receiving, by a network device, a third data stream; extracting a first data stream from the third data stream, and restoring the third data stream to a second data stream; the third data stream includes a first information block and a second information block, wherein the second data stream is restored by the first information block and the second information block; the first information The block is configured to carry the first data stream, the second information block is configured to carry a first data stream distribution indication map, and the first data stream distribution indication map is used to indicate a location of the first information block, where The second information block is identified by a preset map block type.
  • the first data stream is extracted from the third data stream, and the third data stream is restored to the second data stream, thereby improving bandwidth utilization.
  • the second data stream can be exclusive to the bandwidth If the service is formed, the first data stream may be formed by the BE service, and the idle time slot resource of the second data stream may be used to implement statistical multiplexing of services in the flexible Ethernet.
  • the extracting the first data stream from the third data stream includes: acquiring a first segment data stream or a second segment data stream from the third data stream; Identifying a second information block in the first segment data stream or the second segment data stream, acquiring the first data stream distribution indication map from the second information block; and distributing according to the first data stream Instructing a map to obtain the first data stream from the first information block.
  • the method further includes: acquiring preset participation information, and acquiring a second segment data stream from the third data stream according to the preset participation information, where the preset The participation information indicates the location of the second segment data stream, and the first data stream is obtained from the second segment data stream.
  • the location of the first data stream may be indicated by a mask or the like, or the location of the first data stream may not be extracted, and the flexible extraction of the first data stream is implemented.
  • the extracting the first data stream from the third data stream includes: starting from a first location in the first segment data stream or the second segment data stream Obtaining the first data stream distribution indication map.
  • the first data flow distribution indicates that the map identifies a location of the first information block by using a first bit.
  • the second data stream is restored by using the first information block and the second information block, including: where the first information block and the second information block are located The location generates at least two free blocks that carry the free block type.
  • an embodiment of the present invention provides an apparatus for sending a service, including: an acquiring module, configured to acquire at least two data streams, where the at least two data streams include a first data stream and a second data stream; a module, configured to insert the first data stream into the second data stream to generate a third data stream; the third data stream includes a first information block and a second information block, where the first information block And the second information block is generated by the second data stream; the first information block is used to carry the first data stream; and the second information block is used to carry a first data stream distribution indication map, where The first data stream distribution indication map is used to indicate the location of the first information block, the second information block is identified by a preset map block type, and the sending module is configured to send the third data stream.
  • the first data stream is carried by the second data stream, thereby improving the utilization of the bandwidth.
  • the second data stream may be formed by a bandwidth exclusive service, where the first data stream may be formed by using a BE service, and the idle time slot resource of the second data stream may be used to implement statistical multiplexing of services in the flexible Ethernet. .
  • the device embodiment of the third aspect may implement the method embodiment of the first aspect.
  • the processing module is further configured to: acquire the second data stream, and identify at least two free blocks of the second data stream, where the at least two free blocks are located. Generating the first information block and the second information block.
  • the processing module is configured to: insert the first data stream into the first information block; and generate the first data stream distribution according to a location of the first information block Instructing a map to insert the first data stream distribution indication map into the second information block.
  • the processing module is configured to: obtain a first segment data stream from the second data stream, identify a free block in the first segment data stream, and obtain at least two A free block carrying a free block type.
  • the processing module is further configured to: generate a free block distribution indication map, where the free block distribution indication map is used to indicate locations of the at least two free blocks and/or non-free blocks Generating the first data stream distribution indication map according to the free block distribution indication map.
  • the processing module is further configured to: obtain a second segment data stream from the second data stream, and identify at least two free blocks in the second segment data stream. Generating the first information block and the second information block at positions of the at least two free blocks; indicating a location of the second segment data stream by preset participation information.
  • the processing module is further configured to: adjust a location where the second information block is located to be the first segment data stream or the second segment data stream a location.
  • an embodiment of the present invention provides an apparatus for receiving a service, including: a receiving module, configured to receive a third data stream; and a processing module, configured to extract a first data stream from the third data stream, where The third data stream is restored to a second data stream; the third data stream includes a first information block and a second information block, and the second data stream passes the first information block and the second information block Resuming generation; the first information block is used to carry the first data stream; the second information block is used to carry a first data flow distribution indication map, and the first data flow distribution indication map is used to indicate the The location of the first information block, the second information block being identified by a preset map block type.
  • the first data stream is extracted from the third data stream, and the third data stream is restored to the second data stream, thereby improving bandwidth utilization.
  • the second data stream may be formed by a bandwidth exclusive service, where the first data stream may be formed by using a BE service, and the idle time slot resource of the second data stream may be used to implement statistical multiplexing of services in the flexible Ethernet. .
  • the device embodiment of the fourth aspect may implement the method embodiment of the second aspect.
  • the processing module is configured to: acquire a first segment data stream or a second segment data stream from the third data stream; identify the first segment data stream or a second information block in the second segment data stream, obtaining the first data stream distribution indication map from the second information block; and indicating a map according to the first data flow distribution, from the first information block Obtaining the first data stream.
  • the processing module is further configured to: acquire preset participation information, and obtain a second segment data stream from the third data stream according to the preset participation information, where The preset participation information indicates the location of the second segment data stream.
  • the processing module is further configured to: obtain the first data flow distribution indication from a first location in the first segment data stream or the second segment data stream map.
  • the first data flow distribution indicates that the map identifies a location of the first information block by using a first bit.
  • the processing module is configured to: generate at least two free blocks at a location where the first information block and the second information block are located, where the free block carries a free block type.
  • the fifth aspect provides a network system, including the apparatus according to any one of the third aspect and the third aspect, and any one of the fourth aspect and the fourth aspect. Possible implementations of the device described.
  • an embodiment of the present invention provides a network device, including: a processor, a memory, and at least one network interface; the memory is configured to store a computer execution instruction, and when the network device is running, the processor executes a memory execution computer execution instruction. To cause the network device to perform the method as described in the first aspect and any one of the possible implementations of the first aspect.
  • an embodiment of the present invention provides a network device, including: a processor, a memory, and at least one network interface; the memory is configured to store a computer execution instruction, and when the network device is running, the processor executes a memory execution computer execution instruction. To cause the network device to perform the method as described in any one of the second aspect and the second aspect.
  • FIG. 1 is a schematic diagram of service transmission of a flexible Ethernet in the prior art
  • FIG. 2 is a schematic diagram of service transmission of a flexible Ethernet according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of service transmission of a flexible Ethernet according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a flexible Ethernet data frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an overhead block format of a flexible Ethernet data frame according to an embodiment of the present invention.
  • FIG. 5b is a schematic diagram of a control block format of a flexible Ethernet data frame according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a process for multiplexing a flexible Ethernet service according to an embodiment of the present invention.
  • FIG. 7 is an exemplary flowchart of a method for sending a service according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a free block distribution according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a BE service distribution according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a format of a map block according to an embodiment of the present invention.
  • FIG. 10b is a schematic diagram of a format of another map block according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of another BE service distribution according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a format of a mask bit according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of an overhead block format of a flexible Ethernet data frame according to an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of distribution of data flow rearrangement according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram of another data flow rearrangement according to an embodiment of the present invention.
  • FIG. 16 is a schematic diagram of a format of a map block according to an embodiment of the present invention.
  • 16b is a schematic diagram of a format of another map block according to an embodiment of the present invention.
  • FIG. 17 is an exemplary flowchart of a method for receiving a service according to an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of an apparatus for transmitting a service according to an embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of an apparatus for receiving a service according to an embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the technical solution provided by the embodiment of the present invention can be applied to a flexible Ethernet, and can also be applied to other types of networks, such as an Ethernet, an Optical Transport Network (OTN) network, and a Synchronous Digital Hierarchy (Synchronous Digital Hierarchy, SDH) network, etc.
  • the embodiment of the present invention mainly uses flexible Ethernet as an example for description.
  • FIG. 2 is a schematic diagram of service transmission of a flexible Ethernet according to an embodiment of the present invention.
  • the network devices Pa, Pb transmit three services C1, C2, and C3.
  • the physical interface for transmitting the three services in the network devices Pa and Pb is a 100G flexible Ethernet physical interface, and the physical interface is divided into 20 5G granularity slots.
  • the service C1 bandwidth is 10G, occupying 2 time slots, time slot 1 and time slot 2; service C2 bandwidth is 25G, occupying 5 time slots, time slot 3 to time slot 7; service C3 bandwidth is 25G, It takes up 5 slots, slot 8 to slot 12.
  • services C1, C2 are packet services, such as Ethernet services, then services C1, C2 may contain idle information.
  • the idle information does not contain the data information of the service, and the occupied time slot is an idle time slot, which causes waste of time slot resources. Therefore, in the embodiment of the present invention, the idle time slot occupied by the idle information of the service can be shared with other services, for example, Best Effort (BE) service.
  • BE service can be transmitted using the idle time slots in service C1 and service C2, that is, BE service (BE service 1) and service C1 share time slot 1 and time slot 2, BE service (BE service 2) and service C2 shares slot 3 to slot 7.
  • the BE service may also use a separately occupied time slot (BE service 3), for example, slot 13 to time slot 20 that is not allocated to other services, and part (BE service 1, BE service) 2) Use the idle slots of services C1, C2.
  • the BE service in the embodiment of the present invention may be a flexible Ethernet service, a packet service (for example, an Ethernet service), an Internet Protocol (IP) service, a Fibre Channel (FC) service, and an infinite bandwidth. (InfiniBand) business, etc.
  • IP Internet Protocol
  • FC Fibre Channel
  • the BE service usually has a lower priority. When there is a higher priority service in the network, the transmission bandwidth of the BE service cannot be guaranteed, but the transmission bandwidth can be satisfied as much as possible. Therefore, the BE service can be carried and transmitted using idle time slots or idle bandwidths of other higher priority services to improve the utilization of network resources.
  • a block stream with a flexible Ethernet data frame format is formed.
  • a 100G flexible Ethernet physical interface can be divided into 20 5G granular time slots.
  • the structure of the flexible Ethernet data frame formed on the 100G flexible Ethernet physical interface includes 8 lines of code blocks per line (1+20*1023).
  • the data frame structure acts as a sub-frame, 8 acts as a basic frame, and 32 acts as a superframe.
  • the code block here can be a 64B/66B code block.
  • the first code block of each line is an overhead block, and the other 20*1023 code blocks are payload blocks.
  • the payload block of each row can be divided into 1023 segments in units of 20 code blocks, and 20 code blocks of each segment respectively correspond to 20 time slots.
  • the code block identified as 1 in each segment corresponds to time slot 1
  • the code block identified as 2 corresponds to time slot 2, ...
  • the code block identified as 20 corresponds to time slot 20.
  • each column of code blocks identified by 1 corresponds to slot 1
  • the column code block corresponds to time slot 20.
  • the time slot is a TDM transmission time slice, which may correspond to a position of a multi-column code block of one flexible Ethernet data frame, or may correspond to a position of a multi-column code block in a plurality of consecutive flexible Ethernet data frames. .
  • the first code block of the first line that is, the first cost block of the entire data frame.
  • the overhead block includes a control block type "0x4B" plus "05" for indicating that the location is the first overhead block of the flexible Ethernet data frame.
  • the block type of the payload block includes the control block and the data block, which can be identified by the block type.
  • the block type may include a 2-bit sync header, "01b" indicates that the following 8 bytes are data characters, the block type is a data block, and "10b" indicates that the control character and/or data character are followed.
  • the block type is a control block.
  • the control block type may be identified in the control block by a control block type field, and there are 15 control block types in the prior art.
  • the identification and processing of the free block is involved, and the free block belongs to one of the control blocks.
  • the free block carries idle information, which is actually redundant information.
  • a free block is a bandwidth filling of a logical port when a service is in a private physical interface when the traffic is low.
  • a logical port can be considered to be composed of a number of time slots.
  • the time slot corresponding to the free block is a free time slot. It can be identified by a specific control block type.
  • a schematic diagram of a code block format shown in FIG. 5b the first and second bits are a synchronization header "01", indicating that the code block is a control block.
  • the control block types that the control block type "0x1E” can identify include an error indication block and a free block. In the error indication block, the control block type is followed by "0x1E" compressed to 7 bits; in the free block, the control block type is followed by "0x00" compressed to 7 bits.
  • a service with a flexible Ethernet data frame format is transmitted by using a flexible Ethernet physical interface as an example.
  • the implementation process of service multiplexing through a flexible Ethernet physical interface is introduced.
  • the 400G flexible Ethernet physical interface group formed by cascading the two-way services C1 and C2 on four 100GE physical interfaces is multiplexed.
  • the 400G flexible Ethernet physical interface group can be divided into 80 5G granular time slots.
  • Each 100GE physical interface can be divided into 20 5G granular time slots.
  • the service C1 bandwidth is 10G, occupying 2 time slots
  • the service C2 bandwidth is 25G, occupying 5 time slots.
  • the two services C1 and C2 are distributed to the corresponding time slots in the 80 time slot streams, and then the 80 time slot streams are respectively sent to the corresponding physical interfaces in the 400G flexible Ethernet interface group.
  • the service C1 is distributed to the two time slots it occupies, it is sent to the flexible Ethernet physical interface A; after the service C2 is distributed to the five time slots it occupies, it is sent to the flexible Ethernet physical interfaces B and C. That is, the service C1 is transmitted to the physical link through the physical interface A, and the service C2 is transmitted to the physical link through the physical interfaces B and C.
  • the method performed by the network device at the transmitting end may be performed in the process of multiplexing the foregoing service, or may be performed before or after the multiplexing of the foregoing services.
  • the embodiment of the present invention may not be related to the process of multiplexing the foregoing services.
  • the process of multiplexing the service and the embodiment of the present invention are described below, and are only described as an example.
  • FIG. 7 is an exemplary flowchart of a method for sending a service according to an embodiment of the present invention.
  • the method can be performed by a network device such as a flexible Ethernet device or an Ethernet device, and the network device can be a network device at the transmitting end. Including the following steps:
  • the network device receives at least one service, where the at least one service includes a best effort BE service.
  • At least one of the services may include a BE service, and may also include a bandwidth exclusive service (for example, services C1, C2, and C3 in FIG. 2).
  • a bandwidth-exclusive service usually has a higher priority than a BE service. Therefore, the network device allocates bandwidth resources sufficient to carry the service according to the bandwidth requirement of the service, and ensures that the bandwidth is satisfied.
  • the bandwidth exclusive service is an Ethernet service, which may include null The idle information, because the idle information does not contain the data information of the service, but also needs to occupy the time slot, will generate idle time slot resources. At this time, the BE service can be carried and transmitted by using the idle time slot resource of the bandwidth exclusive service.
  • the idle time slot resources of the bandwidth exclusive service are uncertain, it is not necessarily ensured that these idle time slot resources can meet the bandwidth requirement of the BE service, but the bandwidth of the BE service can be provided as much as possible.
  • the BE service can also be transmitted using the bandwidth released by the bandwidth exclusive service. After receiving the BE service, the network device may temporarily perform buffering, and then wait until the bandwidth exclusive service is received, and then perform S12-S14 on the BE service.
  • the raw data stream can be transformed from a bandwidth-exclusive business.
  • the network device receives at least one bandwidth exclusive service, and converts the at least one bandwidth exclusive service into the original data stream.
  • the bandwidth exclusive service can be received simultaneously with the BE service, or can be received separately from the BE service at different times.
  • this step can be performed during the process of service multiplexing as shown in FIG.
  • At least one service in S11 includes a BE service and a bandwidth exclusive service.
  • BE services and bandwidth exclusive services are received at the same time, or received at different times.
  • the BE service can be multiplexed with the bandwidth exclusive service, that is, the technical solution of the embodiment of the present invention is performed while the service is multiplexed.
  • this step can be performed after the service multiplexing as shown in FIG.
  • the network device Before performing S12, the network device can receive the exclusive service of at least one bandwidth, and multiplex the services exclusive to at least one bandwidth to form an original data stream.
  • the process of multiplexing reference may be made to the embodiment shown in FIG. 6, and details are not described herein again.
  • At least one bandwidth exclusive service may be received together with the BE service, or may be separately received.
  • S13 Generate a service distribution indication map, insert the service distribution indication map into a location where the second idle block is located, where the service distribution indication map is used to indicate a location of the first free block, and the second idle The location of the block is identified by the preset map block type.
  • An embodiment of identifying the first free block and the second free block of the original data stream may be: identifying at least two free blocks of the original data stream, the at least two free blocks including a first free block and a second Free block.
  • the second free block may be one or more free blocks of the at least two free blocks for carrying the free block distribution indication map and/or the service distribution indication map; the first free block may be other than the second free block.
  • the remaining free blocks are used to carry BE services. That is, the first free block is replaced with a code block carrying a BE service (referred to as a "BE service block"), and the second free block is replaced with a code block carrying a free block distribution indication map and/or a service distribution indication map. As a "map block").
  • the first free block and the second free block may also be code blocks containing redundant information, such as an ERROR block, etc., in the original data stream (for example, a data stream formed by bandwidth exclusive services).
  • the identifying the at least two free blocks in the original data stream may be: acquiring the first segment data stream in the original data stream, identifying the free block in the first segment data stream, and obtaining at least two A free block that carries a free block type. After identifying at least two free blocks of the original data stream, The method further includes generating a free block distribution indication map, the free block distribution indication map being used to indicate locations of the at least two free blocks and/or non-free blocks.
  • the original data stream includes a free block "/I/" and a non-free block "D/C".
  • the original data stream can be an encoded data stream or an unencoded data stream.
  • the encoded data stream may be 64B/66B coded, or may be 8B/10B code, 512B/514B code, or the like.
  • the free block of the data stream can be identified for a specific data stream format.
  • the data stream is 64B/66B code as an example for description.
  • the free block "/I/" in the data stream can be identified by a free block type, such as a sync header (10), a control block type (0x1E), and at least one 0x00 followed by a control block type.
  • the data stream after service multiplexing can be detected.
  • the original data stream sent for each physical interface of the 400G flexible Ethernet physical interface refers to the flexible Ethernet.
  • the format of the data frame starts from the first code block after the first overhead block, and sequentially takes 20 code blocks as a segment data stream to form a free block distribution map as shown in FIG. 8.
  • the first segment data stream may be a segment data stream formed by consecutive 20 code blocks in the original data stream. Since the data frame format of the flexible Ethernet can be divided into 20 time slots, 20 code blocks can correspond to 20 time slots. As shown in FIG.
  • each row has 20 code blocks, wherein 20 code blocks may all be non-free block "D/C”, or all are free blocks “/I/”, and may also be free blocks and A combination of non-free blocks.
  • 20 code blocks may all be non-free block "D/C”, or all are free blocks “/I/”, and may also be free blocks and A combination of non-free blocks.
  • the free block distribution indication map may use 20 bits to indicate the position distribution of the free block and the non-free block among the corresponding 20 code blocks.
  • the free block distribution indication map may indicate the location distribution and number of free blocks, and may also indicate the location distribution and number of non-free blocks.
  • the free block distribution indication map includes a first bit indicating a free block and a second bit indicating a non-free block. For example, in FIG. 8, a free block is indicated by a bit "0", and a bit "1" indicates a non-free block.
  • the free block distribution indication map may also indicate one code block using two bits or more. For example, a free block is indicated by "00" and a non-free block is indicated by "01".
  • 20 code blocks are taken as one sector data stream in the original data stream, and some of the segment data streams do not include free blocks, some contain one free block, or some contain more than two. Free block.
  • a free block distribution indication map and/or a traffic distribution indication map may be inserted at a position of one of the free blocks (second free block) to form a map block; The location of the free block (the first free block) is inserted into the BE service to form a BE traffic block.
  • a segment data stream that contains only one free block or no free block it may not be used to carry BE traffic, nor does it need to carry a free block distribution indication map and/or a service distribution indication map, such as not used in FIG.
  • the traffic distribution indication map may indicate the location of the first free block, ie the location of the BE traffic block; the free block distribution indication map may indicate the location of the free block, including the first free block and the second free location.
  • the traffic distribution indication map may be generated by the free block distribution indication map.
  • the traffic distribution indication map and the free block distribution indication map may contain the same number of bits and bit values. The generation of the service distribution indication map may be performed after the insertion of the BE service, or may be performed after the insertion of the BE service, which is not limited by the present invention.
  • Porition refers to a relative position.
  • the relative position between two blocks may be constant.
  • the first free block and The second free block is separated by eight non-free blocks.
  • the relative positions between the two free blocks can be unchanged.
  • the location of the second free block is identified by a preset map block type. As shown in FIG. 10a, the map tile type may include a sync header "10", a control block type "4B", and "0xA".
  • a total of 24 bits can be arbitrarily taken, and 20 of them can carry a service distribution indication map and/or a free block distribution indication map.
  • the map block type can adopt other identification methods, as long as it is different from the 15 control block types of the 64B/66B encoding in the prior art, and meets the constraint requirements of the code block type definition of the physical interface. For example, as shown in FIG. 10b, an embodiment of the present invention defines a new control block type "0x00".
  • the traffic distribution indication map and/or the free block distribution indication map may be carried by a total of 56 bits of seven bytes of D0 to D6.
  • the identifying the first free block and the second free block in the original data stream may further include: acquiring a second segment data stream from the original data stream, and identifying the second segment data stream At least two free blocks, the at least two free blocks including the first free block and the second free block; indicating a location of the second segment data stream by preset participation information.
  • a partial time slot may be pre-designated as a time slot that is not recognized by the free block (including the first free block and the second free block) (hereinafter referred to as "non-participating time slot").
  • slot 3 and slot 4 are designated non-participating slots, and it is not necessary to identify whether the code blocks corresponding to the two slots are free blocks.
  • the free block "/I/" included in the two column code blocks corresponding to the two time slots is an unused free block, that is, a free block that does not participate in the time slot, and does not carry the free block distribution indication map and/or service. The distribution indicates the map and does not carry the BE service.
  • the preset participation information can be represented in the service distribution indication map.
  • the first free block is indicated by “00”
  • the non-free block is indicated by “01”
  • the free block corresponding to the slot is not indicated by "10”.
  • the preset participation information may also be carried in the free block distribution indication map, for example, the first free block and the second free block are indicated by "00”, the non-free block is indicated by "01”, and the non-participation is indicated by "10".
  • the free block corresponding to the slot is indicated by "00”
  • the non-free block is indicated by "01”
  • the non-participation is indicated by "10”.
  • the preset participation information may also be represented by a free block distribution indication map after the mask operation.
  • the service distribution indication map may also be masked, and the principle is similar.
  • the transmitting end device carries the free block distribution indication map by the location where the second free block is located, and the receiving end device performs a masking operation on the free block distribution indication map by using the mask bits as shown in FIG. 12 .
  • FIG. 12 is a 20-bit mask bit.
  • the third and fourth bits are all "1", indicating that the time slot is not involved; the other bits are all "0", indicating that the time slot is involved.
  • a free block distribution indication map (1 identifies a non-free block, 0 identifies a free block) using the 20 mask bits and a block data stream of 20 code blocks to perform a "phase" mask operation, which may cause the free block distribution
  • the third and fourth bits of the indication map are set to 1 in the case of non-zero, that is, the positions of the code blocks corresponding to the two bits cannot be inserted into the BE service, nor can the service distribution indication map or the free block distribution indication map be inserted.
  • the mask bit can also be directly transmitted as the preset participation information.
  • the non-participating time slot can be indicated by the bit “0", and the participating time slot is indicated by the bit "1".
  • the non-participating time slot is indicated by the bit "1"
  • the participating time slot is indicated by the bit "0".
  • the frequency of not participating in slot transmission may be different in different application scenarios:
  • the preset participation information may not be transmitted in real time.
  • the preset participation information may be directly configured on the network device of the transmitting end and the network device of the receiving end, for example, through the network management; or the preset participation information may be carried through the overhead block of the flexible Ethernet data frame before the service transmission starts. Wait.
  • the preset participation information is preferably carried in the data stream for real-time transmission. It can be carried by a map block, for example, it can be masked in the service distribution indication map, or the mask bit can be directly transmitted.
  • the preset participation information may also be periodically transmitted.
  • the time slot 3 4 becomes the time slot 5, 6, and the preset participation information can be carried in the overhead block of the flexible Ethernet data frame.
  • an overhead block appears every 1023 20 code blocks.
  • the second overhead of the flexible Ethernet data frame and/or the reserved field of the third overhead block may be utilized to carry preset participation information such as mask bits.
  • the preset participation information may be a mask bit, or may be represented by a mask or a service distribution indication map representation by a mask operation.
  • a mask bit for example, in Figure 10a, in addition to D1, D2, D3, there are 28 reserved bits available. Distribution of free blocks indicates a map or business segment The cloth indicates that the free block corresponding to the time slot is not indicated by the "10" or mask operation in the map; or the reserved bit is used to carry the mask bit or the like.
  • the time slot (referred to as “participating time slot”) that participates in the identification of the free block may be specified in advance.
  • other time slots except the time slots 3 and 4 are specified in FIG. 11 , and the implementation principle is similar, and details are not described herein again. .
  • part or all of the non-participating time slots may be allocated to the BE service as a separately occupied time slot, and the separately occupied time slot is a basic guaranteed bandwidth of the BE service.
  • the actual bandwidth of the BE service may exceed the basic guaranteed bandwidth, that is, it may also occupy idle time slot resources of other services.
  • the segment data stream after the BE service is inserted may also be rearranged.
  • the segment data stream may also be rearranged before the BE service is inserted.
  • the second free block (or map block) is placed in the first location, and then the non-free block and the first free block (or BE traffic block) are placed in sequence.
  • the first free block (or BE service block) may be placed first, and then the non-free block may be placed.
  • the segment data streams of the third row and the fourth row may not be rearranged.
  • the positions of the first code block and the second free block may be exchanged such that the second free block (or map block) is fixed at the first position.
  • the second free block (or map block) may also be placed at other fixed locations.
  • the first code block after the first overhead block of the flexible Ethernet data frame may also be used on each physical interface of the 400G flexible Ethernet physical interface group. At the beginning, 40 code blocks are successively taken as one segment data stream.
  • the first code block after the first overhead block is sequentially taken as 50 code blocks as a segment data stream.
  • 5 code blocks, 10 code blocks, and the like may be continuously taken as one segment data stream. The invention is not limited.
  • a total of 24 bits of D1, D2, and D3, plus a total of 52 bits of reserved 28 bits can carry a 40-bit traffic distribution indication map and/or a free block distribution indication map.
  • the number of code blocks of the segment data stream exceeds 52, at least two code blocks may be used to carry the traffic distribution indication map and/or the free block distribution indication map.
  • a 56 bit traffic distribution indication map and/or a free block distribution indication map may be carried.
  • the service distribution indication map and/or the free block distribution indication map may also be carried by a data code block whose synchronization header is “01”.
  • the location of one or more map tiles may be indicated by a pointer field.
  • a MapEx field is added to the first of the at least two map blocks to identify the location of the map block other than the first map block.
  • the first map block is identified using a map tile type including control block types "4B" and "0xA".
  • MapEx can be a pointer to indicate the location of the remaining map blocks; also
  • the location of the second map block may be indicated by the MapEx of the first map block, the location of the third map block by the MapEx of the second map block, and so on.
  • map block type may be used to identify the first map block, for example, the control block type “0x00”, and a section length indication field may be added, and the L Indicator is used to identify the length L of the section data stream. , for example 80.
  • the length of the segment data stream is L
  • L the boundary of the segment data stream is relative to the subframe of 20*1023 code block length, the basic frame of 20*1023*8 code block length, and the superframe of 20*1023*8*32 code block length.
  • a 6-bit boundary pointer field (0 to 63) is defined in the overhead of the flexible Ethernet data frame to indicate the start position and the like of the first sector data stream in the current frame.
  • the segment data stream can be acquired in parallel on multiple physical interfaces.
  • the sector data stream can refer to the boundary of the flexible Ethernet data frame, ie the first overhead block of the flexible Ethernet data frame determines the sector boundary.
  • the network device acquires at least two data streams, where the at least two data streams include a first data stream and a second data stream; and inserting the first data stream into the second data stream, Generating a third data stream; the third data stream includes a first information block and a second information block, the first information block and the second information block being generated by the second data stream; the first information The block is configured to carry the first data stream, the second information block is configured to carry a first data stream distribution indication map, and the first data stream distribution indication map is used to indicate a location of the first information block, where The second information block is identified by a preset map block type; the third data stream is sent.
  • the technical solution of the embodiment of the present invention can be implemented by the method flow shown in FIG. 7.
  • the first data stream may be a data stream formed by the BE service
  • the second data stream may be a raw data stream formed by the bandwidth exclusive service
  • the first information block may be a BE service block
  • the second information block may be a map block.
  • the first data stream distribution indication map may be a free block distribution indication map and/or a traffic distribution indication map.
  • the implementation manner of the embodiment of the present invention is not limited to the method flow shown in FIG. 7. For example, in S12, it is not necessary to identify the free block, but in the process of forming the original data stream by the bandwidth exclusive service, determine the location where the free block needs to be generated, and insert the BE service and the position where the free block needs to be generated.
  • Business distribution indicator map is not necessary to identify the free block, but in the process of forming the original data stream by the bandwidth exclusive service, determine the location where the free block needs to be generated, and insert the BE service and the position where the free block needs to be generated.
  • the BE service is carried by the free block or the redundant information block of the bandwidth exclusive service, and the idle time slot of the bandwidth exclusive service is fully utilized, thereby improving the bandwidth utilization and realizing in the flexible Ethernet.
  • Statistical multiplexing of services are described below.
  • FIG. 17 is an exemplary flowchart of a method for receiving a service according to an embodiment of the present invention.
  • the method can It is executed by a network device such as a flexible Ethernet device or an Ethernet device, and the network device may be a receiving network device.
  • the method performed by the network device at the receiving end may be performed in the process of service demultiplexing, or may be performed before or after the service demultiplexing.
  • the process of service demultiplexing and the multiplexing process shown in FIG. 6 are mutually reverse processes, and are not described here.
  • the embodiment of the present invention may not be related to the process of service demultiplexing.
  • the following describes the process of service demultiplexing in combination with the embodiment of the present invention, and is merely described as an example.
  • the method comprises the following steps:
  • the network device receives the data flow that carries the BE service and the service distribution indication map.
  • the data stream carrying the BE service and the service distribution indication map may also carry the bandwidth exclusive service, and the BE service may be carried by the idle time slot of the bandwidth exclusive service. How the BE service is carried through the idle time slot of the bandwidth exclusive service can be seen in the embodiment shown in FIG.
  • this step can be performed during the process of service demultiplexing. That is, while the received data stream is demultiplexed, the technical solution of the present invention is executed.
  • this step can be performed prior to service demultiplexing. That is, the BE service is first extracted from the received data stream, and then the bandwidth exclusive service is demultiplexed.
  • the first information block may be a BE service block carrying a BE service
  • the second information block may be a map block carrying a service distribution indication map.
  • the implementation of the service distribution indication map in the second information block may include: acquiring a first segment data stream from the data stream carrying the BE service and the service distribution indication map; and identifying the first segment data A map block type in the stream, where the service distribution indication map is obtained in a second information block in which the map block type is located.
  • first segment data stream may be the same length as the sender network device, or may be different.
  • map block and the map of the service distribution indication in the map block refer to the embodiment shown in FIG. 10a and FIG. 10b, and details are not described herein again.
  • the network device may further acquire the preset participation information, and obtain, according to the preset participation information, the second segment data stream from the data stream that carries the BE service and the service distribution indication map, where the preset The participation information indicates the location of the second segment data stream.
  • the sending network device specifies a time slot in the first segment data stream that does not participate in the free block identification (not participating in the time slot)
  • the receiving network device needs to obtain the preset participation information according to the specified rule of the sending network device.
  • the rules of the network device that the sender does not participate in the time slot refer to the embodiment shown in FIG. 11, 12, and 13 for details.
  • the acquiring the service distribution indication map in the second information block includes: acquiring the service distribution indication map from a first location in the first segment data stream or the second segment data stream. If the sender network device rearranges the segment data stream (see the embodiment shown in FIGS. 14 and 15), the receiving network device may follow the sender rearrangement rule from the first segment data stream or the second. A service distribution indication map is obtained in a preset first location in the segment data stream.
  • the service distribution indication map identifies a location of the first information block by a first bit. For example, as shown in FIG. 9, the location of the first information block for inserting the BE service is identified by bit "0".
  • the traffic distribution indication map can indicate the location of the BE traffic, for example indicated by the bit "0". If the service distribution indication map indicates that the location where the first information block is located and the location where the second information block is located by using the same bit (for example, “0”), the second information block is first identified according to the map block type, and in the second The service distribution indication map is obtained in the information block, and the location of the second information block is excluded in the service distribution indication map to obtain the location of the first information block.
  • the free block carries a free block type.
  • the free block may be generated at the location of the second information block and the first information block, respectively. Since the BE service occupies the idle time slot (the location of the free block) of the bandwidth exclusive service for transmission, the BE service block and the map block are restored to the original free block, that is, the original data stream carrying only the bandwidth exclusive service is restored. .
  • the field format of the free block can be seen in the embodiment shown in Figure 5b.
  • the network device receives the third data stream, extracts the first data stream from the third data stream, and restores the third data stream to the second data stream, where the third data stream includes An information block and a second information block, the second data stream being restored by the first information block and the second information block; the first information block being used to carry the first data stream;
  • the second information block is configured to carry a first data flow distribution indication map, where the first data flow distribution indication map is used to indicate a location of the first information block, and the second information information block is identified by a preset map block type. .
  • the technical solution of the embodiment of the present invention can be implemented by the method flow shown in FIG. 17.
  • the third data stream can be a data stream carrying a BE service and a service distribution indication map
  • the first data stream can be a data formed by the BE service.
  • the second data stream may be a raw data stream formed by the bandwidth exclusive service.
  • the first information block may be a BE service block
  • the second information block may be a map block
  • the first data flow distribution indication map may be a service distribution indication. map.
  • the implementation manner of the embodiment of the present invention is not limited to the method flow shown in FIG.
  • the BE traffic and traffic distribution indication maps can be received from different data streams.
  • the BE service is carried by the free block or the redundant information block of the bandwidth exclusive service, and the BE service is extracted from the bandwidth exclusive service.
  • the idle time slot of the bandwidth exclusive service is fully utilized, the bandwidth utilization is improved, and the statistical multiplexing of services is realized in the flexible Ethernet.
  • the technical solution provided by the embodiment of the present invention can be applied to other network types, such as Ethernet, OTN, SDH, etc., in addition to being applied to flexible Ethernet.
  • flexible Ethernet uses 64B/66B encoding to encode the data stream.
  • an 8-byte byte group in the uncoded data stream or the decoded data stream can correspond to a 64B/66B code.
  • the MII interface data may be uncoded or decoded characters.
  • the MII interface can be a 1 Gbps Media Independent Inteface (GMII), a 10 Gbps Media Independent Inteface (XGMII), and a 40 Gbps Media Independent Inteface (XLVGII). ), 100Gbps Media Independent Inteface (CGMII), 400Gbps Media Uncorrelated Interface (400Gbps Media) Independent Inteface, CDGMII), etc.
  • GMII Media Independent Inteface
  • XGMII 10 Gbps Media Independent Inteface
  • XLVGII 40 Gbps Media Independent Inteface
  • CGMII 100Gbps Media Independent Inteface
  • CDGMII CDGMII
  • the first two columns are MII interface data characters, including Transmit (character) Control (signals), TXC) / Receive (character) control (signal) (Received (character) Control (signals), RXC), Transmit (character Data, TXD) / Receive (character) Data (Received (character) Data, RXD).
  • Each pair ⁇ TXC, TXD> or ⁇ RXC, RXD> may correspond to one of the coding block types of the 64B/66B encoding. For example, when TXC/RXC is “0b1” and TXD/RXD is “0x07”, it corresponds to a free block.
  • TXC/RXC is “0b1”
  • TXD/RXD is “0x07”
  • the MII interface data characters ⁇ TXC, TXD> or ⁇ RXC, RXD> may be ⁇ 0b1, 0xFF>, and a mapping relationship is established with the map block having the 64B/66B encoding format. Therefore, the technical solution of the embodiment of the present invention can also be implemented based on non-coded characters such as MII interface data characters. Of course, the embodiments of the present invention are also compatible with other encoding formats, such as 8B/10B encoding, 512B/514B encoding, and the like.
  • FIG. 18 is a schematic structural diagram of an apparatus for transmitting a service according to an embodiment of the present invention.
  • the device can be a flexible Ethernet device, an Ethernet device, an OTN device, an SDH device, or the like.
  • the apparatus may include: an obtaining module 101, a processing module 102, and a transmitting module 103.
  • each functional module is logically divided, and the manner of division is not unique.
  • each module can be a separate circuit module or can be integrated into one circuit module.
  • Each module can be implemented in the form of an integrated circuit such as a chip.
  • the apparatus for transmitting a service according to an embodiment of the present invention may perform the method steps of the embodiment shown in FIG.
  • the obtaining module 101 is configured to acquire at least two data streams, where the at least two data streams include a first data stream and a second data stream.
  • the processing module 102 is configured to insert the first data stream into the second data stream to generate a third data stream.
  • the third data stream includes a first information block and a second information block, where the first information block and the second information block are generated by the second data stream;
  • the first information block is configured to carry the first data stream;
  • the second information block is configured to carry a first data stream distribution indication map, and the first data stream distribution indication map is used to indicate the first information a location of the block, the second information block being identified by a preset map block type;
  • the sending module 103 is configured to send the third data stream.
  • the BE service is carried by the free block or the redundant information block of the bandwidth exclusive service, and the idle time slot of the bandwidth exclusive service is fully utilized, thereby improving the bandwidth utilization and realizing in the flexible Ethernet.
  • Statistical multiplexing of services are described below.
  • FIG. 19 is a schematic structural diagram of an apparatus for receiving a service according to an embodiment of the present invention.
  • the device can For flexible Ethernet devices, Ethernet devices, OTN devices, SDH devices, etc.
  • the apparatus may include: a receiving module 201 and a processing module 202.
  • each functional module is logically divided, and the manner of division is not unique.
  • each module can be a separate circuit module or can be integrated into one circuit module.
  • Each module can be implemented in the form of an integrated circuit such as a chip.
  • the apparatus for transmitting a service according to an embodiment of the present invention may perform the method steps of the embodiment shown in FIG.
  • the receiving module 201 is configured to receive a third data stream.
  • the processing module 202 is configured to extract a first data stream from the third data stream, and restore the third data stream to a second data stream.
  • the third data stream includes a first information block and a second information block, where the second data stream is restored by using the first information block and the second information block;
  • the first information block is configured to carry the first data stream; the second information block is configured to carry a first data stream distribution indication map, and the first data stream distribution indication map is used to indicate the first information
  • the position of the block, the second information block is identified by a preset map block type.
  • the BE service is carried by the free block or the redundant information block of the bandwidth exclusive service, and the BE service is extracted from the bandwidth exclusive service.
  • the idle time slot of the bandwidth exclusive service is fully utilized, the bandwidth utilization is improved, and the statistical multiplexing of services is realized in the flexible Ethernet.
  • FIG. 20 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • the network system can be a flexible Ethernet, Ethernet, OTN, SDH network, and the like.
  • the network system may include at least two network devices, such as a network device 301 and a network device 302.
  • Each network device may be a sender network device or a receiver network device, and may have a structure as shown in FIG. 18 and/or FIG.
  • FIG. 21 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device can be a flexible Ethernet device, an Ethernet device, an OTN device, an SDH device, or the like.
  • the network device 400 can include a processor 401, a memory 402, at least one network interface (eg, network interface 403, network interface 404), a demultiplexing chip 405, and a multiplexing chip 406.
  • the demultiplexing chip 405 and the multiplexing chip 406 may be included; if the network device only includes the sending function, only the multiplexing chip 406 may be included; if the network device only includes the receiving function, it may only include The chip 405 is demultiplexed.
  • the processor 401 can be a general-purpose central processing unit (CPU), a microprocessor, a network processing unit (NPU), an application specific integrated circuit (ASIC), or at least one integrated system.
  • the circuit is used to execute the related program to implement the technical solution provided by the embodiment of the present invention.
  • the memory 402 can be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM).
  • the memory 402 can store an operating system and other applications.
  • the program code for implementing the technical solution provided by the embodiment of the present invention is saved in the memory 402 and executed by the processor 401.
  • Network interfaces 403, 404 enable communication between network device 400 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the network interface 403 may have a transmitting function or a receiving function, and may also have a transmitting function and a receiving function.
  • the network interface 403, 404 It can be a logical port (for example, a logical port formed by several time slots) or a physical interface (for example, a flexible Ethernet physical interface of 100G).
  • the demultiplexing chip 405 and the multiplexing chip 406 can be implemented by an ASIC, a Field-Programmable Gate Array (FPGA), or the like.
  • a dedicated chip that can implement the technical solution of the present invention can also be a general-purpose chip that includes the functions of the technical solution of the present invention.
  • the demultiplexing chip 405 is configured to demultiplex the received BE service
  • the multiplexing chip 406 is configured to multiplex and transmit the BE service.
  • network device 400 receives at least one traffic through network interface 403 or 404, the at least one service including best effort BE traffic.
  • the network device 400 executes the code stored in the memory 402 by the processor 401, or the multiplex chip 406 executes the code stored by itself, and executes on the multiplexing chip 406: the network device acquires at least two data streams, the at least two data streams Include a first data stream and a second data stream; inserting the first data stream into the second data stream to generate a third data stream; the third data stream includes a first information block and a second information block The first information block and the second information block are generated by the second data stream; the first information block is used to carry the first data stream; and the second information block is used to carry the first data block.
  • the data stream distribution indicates a map, the first data stream distribution indication map is used to indicate a location of the first information block, the second information block is identified by a preset map block type, and the third data stream is sent.
  • network device 400 receives a data stream carrying best effort BE traffic through network interface 403 or 404.
  • the network device 400 executes the code stored in the memory 402 by the processor 401, or the demultiplexing chip 405 executes the code stored by itself, executing on the demultiplexing chip 405: the network device receives the third data stream; from the third data Extracting a first data stream from the stream, and restoring the third data stream to a second data stream; the third data stream includes a first information block and a second information block, and the second data stream passes the first data stream The information block and the second information block are restored and generated; the first information block is used to carry the first data stream; the second information block is used to carry a first data stream distribution indication map, the first data The flow distribution indication map is used to indicate the location of the first information block, and the second information block is identified by a preset map tile type.
  • any one embodiment of the present invention can be implemented by using the network device 400 shown in FIG.
  • the network device 400 shown in FIG. 21 only shows the processor 401, the memory 402, the network interface 403, 404, the demultiplexing chip 405, and the multiplexing chip 406, in the specific implementation process, the field Skilled artisans will appreciate that network device 400 also includes other devices necessary to achieve proper operation.
  • the network device 400 may also include hardware devices that implement other additional functions, depending on the particular needs.
  • network device 400 also includes a power source, a fan, a clock unit, a master unit, and the like.
  • network device 400 may also only include the components necessary to implement embodiments of the present invention, and does not necessarily include all of the devices shown in FIG.
  • the BE service can be inserted in the empty time slot of the original data stream formed by the bandwidth exclusive service, thereby improving the utilization of the network bandwidth resource.

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Abstract

本发明实施例公开了一种发送和接收业务的方法、装置和网络系统。其中，发送业务的方法包括：网络设备获取第一数据流和第二数据流；将所述第一数据流插入到所述第二数据流中，生成第三数据流；所述第三数据流包含第一信息块和第二信息块；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。提高了网络带宽资源的利用率，在灵活以太网中实现了业务的统计复用。

Description

一种发送和接收业务的方法、装置和网络系统 技术领域
本申请涉及通信领域，尤其涉及一种发送和接收业务的方法、装置和网络系统。
背景技术
灵活以太网(FlexE)结合了以太网和传送网(例如，光传送网(Optical Transport Network，OTN)、同步数字体系(Synchronous Digital Hierarchy，SDH)等)的一些技术特性，是对以太网技术演进的一个重要里程碑。灵活以太网技术的出现，以太网接口呈现了虚拟化的特性。对多个以太网物理接口进行级联，以支持若干个虚拟的逻辑端口。例如，4个100吉比特以太网(100Gigabit Ethernet，100GE)的物理接口级联成的一个400吉比特(400Gigabit，400G)灵活以太网物理接口组，可以支持若干个逻辑端口。每个逻辑端口的带宽都可以任意调整，所有的逻辑端口共同划分4个100G物理接口的总带宽。通过这种方式，可以灵活传输不同带宽的业务。
当前，灵活以太网采用时分复用(Time Division Multiplex，TDM)的传输方式，即对灵活以太网物理接口的带宽进行时隙划分。逻辑端口可以由若干个时隙组成。如上文所述的4个100GE物理接口级联而成的400G灵活以太网物理接口组，可以划分为80个5G粒度的时隙。每个业务单独分配若干个时隙，其中，被分配的时隙为某个业务独享。
如图1所示，网络设备Pa、Pb之间传输了三个业务C1、C2、C3，每个业务占用一定的时隙带宽。例如，业务C1占用了两个时隙，这两个时隙并不能被业务C2、C3或者其他的业务共享，业务C2、C3亦如此。如果这些业务为较低流量的分组业务时，例如较低流量的以太网业务时，在这些业务所占用的时隙上，在网络设备之间会传输大量的分组间隙(Interpacket Gap，IPG)，例如空闲信息(Idle)。空闲信息(Idle)实际上没有承载业务的数据信息，导致时隙带宽资源的浪费。
发明内容
有鉴于此，本发明实施例提供一种发送和接收业务的方法、装置和网络系统，可以解决灵活以太网在业务传输的过程中存在时隙资源浪费的问题。
第一方面，本发明实施例提供了一种发送业务的方法，包括：网络设备获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；将所述第一数据流插入到所述第二数据流中，生成第三数据流；所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；发送所述第三数据流。本发明实施例中，通过第二数据流承载第一数据流，提高了带宽的利用率。其中，第二数据流可以是带宽独享的业务形成的，第一数据流可以是BE(Best Effort，尽力 而为)业务形成的，利用第二数据流的空闲时隙资源，可以在灵活以太网中实现业务的统计复用。
在一种可能的实现方式中，所述方法还包括：获取所述第二数据流，识别所述第二数据流的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块。将第二数据流中的空闲块识别出来，用于承载第一数据流以及第一数据流分布指示地图，充分利用了空闲时隙资源。可选地，还可以将其他冗余信息块识别出来，例如ERROR块，进一步利用了冗余时隙资源。
在一种可能的实现方式中，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块，包括：将所述第一数据流插入到所述第一信息块；根据所述第一信息块的位置生成所述第一数据流分布指示地图，将所述第一数据流分布指示地图插入到所述第二信息块。可选地，可以先将第一数据流插入到第一信息块，再生成第一数据流分布指示地图，还可以先生成第一数据流分布指示地图，再将第一数据流插入到第一信息块。通过第一数据流分布指示地图，可以指示第一信息块的位置，便于接收端设备从第三数据流中提取第一数据流。
在一种可能的实现方式中，所述识别所述第二数据流中的至少两个空闲块，包括：从所述第二数据流中获取第一区段数据流，识别所述第一区段数据流中的空闲块，得到至少两个空闲块，所述空闲块携带空闲块类型。对第二数据流进行分区段处理，可以实现第一数据流的分区段插入，降低处理延时。
在一种可能的实现方式中，所述识别所述第二数据流的至少两个空闲块之后，还包括：生成空闲块分布指示地图，所述空闲块分布指示地图用于指示所述至少两个空闲块和/或非空闲块的位置；根据所述空闲块分布指示地图生成所述第一数据流分布指示地图。
在一种可能的实现方式中，所述方法还包括：从所述第二数据流中获取第二区段数据流，识别所述第二区段数据流中的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和所述第二信息块；通过预设的参与信息指示所述第二区段数据流的位置。可以通过掩码等方式指示可以用于插入第一数据流的位置，或者指示不能插入第一数据流的位置，实现了第一数据流的灵活插入。
在一种可能的实现方式中，所述方法还包括：将所述第二信息块所在的位置调整为所述第一区段数据流或所述第二区段数据流中的第一位置。通过对第二信息块，或者第一区段数据流，或者第二区段数据流的位置进行重排，可以提高接收端设备的数据恢复效率。
第二方面，本发明实施例提供了一种接收业务的方法，包括：网络设备接收第三数据流；从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。本发明实施例中，从第三数据流中提取第一数据流，将第三数据流恢复为第二数据流，提高了带宽的利用率。其中，第二数据流可以是带宽独享的 业务形成的，第一数据流可以是BE业务形成的，利用第二数据流的空闲时隙资源，可以在灵活以太网中实现业务的统计复用。
在一种可能的实现方式中，所述从所述第三数据流中提取第一数据流，包括：从所述第三数据流中获取第一区段数据流或第二区段数据流；识别所述第一区段数据流或第二区段数据流中的第二信息块，从所述第二信息块中获取所述第一数据流分布指示地图；根据所述第一数据流分布指示地图，从所述第一信息块中获取所述第一数据流。对第三数据流进行分区段处理，可以实现第一数据流的分区段提取，降低处理延时。通过第一数据流分布指示地图，可以指示第一信息块的位置，便于接收端设备从第三数据流中提取第一数据流。
在一种可能的实现方式中，所述方法还包括：获取预设的参与信息，根据所述预设的参与信息从所述第三数据流中获取第二区段数据流，所述预设的参与信息指示所述第二区段数据流的位置，从第二区段数据流中获取第一数据流。可以通过掩码等方式指示可以用于提取第一数据流的位置，或者指示不能提取第一数据流的位置，实现了第一数据流的灵活提取。
在一种可能的实现方式中，所述从所述第三数据流中提取第一数据流，包括：从所述第一区段数据流或所述第二区段数据流中的第一位置获取所述第一数据流分布指示地图。通过对第二信息块，或者第一区段数据流，或者第二区段数据流的位置进行重排，可以提高接收端设备的数据恢复效率。
在一种可能的实现方式中，所述第一数据流分布指示地图通过第一比特标识所述第一信息块的位置。
在一种可能的实现方式中，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成，包括：在所述第一信息块和所述第二信息块所在的位置生成至少两个空闲块，所述空闲块携带空闲块类型。
第三方面，本发明实施例提供了一种发送业务的装置，包括：获取模块，用于获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；处理模块，用于将所述第一数据流插入到所述第二数据流中，生成第三数据流；所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；发送模块，用于发送所述第三数据流。本发明实施例中，通过第二数据流承载第一数据流，提高了带宽的利用率。其中，第二数据流可以是带宽独享的业务形成的，第一数据流可以是BE业务形成的，利用第二数据流的空闲时隙资源，可以在灵活以太网中实现业务的统计复用。
第三方面的装置实施例可以实现第一方面方法实施例。
在一种可能的实现方式中，所述处理模块，还用于：获取所述第二数据流，识别所述第二数据流的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块。
在一种可能的实现方式中，所述处理模块，用于：将所述第一数据流插入到所述第一信息块；根据所述第一信息块的位置生成所述第一数据流分布指示地图，将所述第一数据流分布指示地图插入到所述第二信息块。
在一种可能的实现方式中，所述处理模块，用于：从所述第二数据流中获取第一区段数据流，识别所述第一区段数据流中的空闲块，得到至少两个空闲块，所述空闲块携带空闲块类型。
在一种可能的实现方式中，所述处理模块，还用于：生成空闲块分布指示地图，所述空闲块分布指示地图用于指示所述至少两个空闲块和/或非空闲块的位置；根据所述空闲块分布指示地图生成所述第一数据流分布指示地图。
在一种可能的实现方式中，所述处理模块，还用于：从所述第二数据流中获取第二区段数据流，识别所述第二区段数据流中的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和所述第二信息块；通过预设的参与信息指示所述第二区段数据流的位置。
在一种可能的实现方式中，所述处理模块，还用于：将所述第二信息块所在的位置调整为所述第一区段数据流或所述第二区段数据流中的第一位置。
第四方面，本发明实施例提供了一种接收业务的装置，包括：接收模块，用于接收第三数据流；处理模块，用于从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。本发明实施例中，从第三数据流中提取第一数据流，将第三数据流恢复为第二数据流，提高了带宽的利用率。其中，第二数据流可以是带宽独享的业务形成的，第一数据流可以是BE业务形成的，利用第二数据流的空闲时隙资源，可以在灵活以太网中实现业务的统计复用。
第四方面的装置实施例可以实现第二方面方法实施例。
在一种可能的实现方式中，所述处理模块，用于：从所述第三数据流中获取第一区段数据流或第二区段数据流；识别所述第一区段数据流或第二区段数据流中的第二信息块，从所述第二信息块中获取所述第一数据流分布指示地图；根据所述第一数据流分布指示地图，从所述第一信息块中获取所述第一数据流。
在一种可能的实现方式中，所述处理模块，还用于：获取预设的参与信息，根据所述预设的参与信息从所述第三数据流中获取第二区段数据流，所述预设的参与信息指示所述第二区段数据流的位置。
在一种可能的实现方式中，所述处理模块，还用于：从所述第一区段数据流或所述第二区段数据流中的第一位置获取所述第一数据流分布指示地图。
在一种可能的实现方式中，所述第一数据流分布指示地图通过第一比特标识所述第一信息块的位置。
在一种可能的实现方式中，所述处理模块，用于：在所述第一信息块和所述第二信息块所在的位置生成至少两个空闲块，所述空闲块携带空闲块类型。
第五方面，本发明实施例提供了一种网络系统，包括如第三方面及第三方面的任意一种可能的实现方式所述的装置，以及如第四方面及第四方面的任意一种可能的实现方式所述的装置。
第六方面，本发明实施例提供了一种网络设备，包括：处理器、存储器和至少一个网络接口；存储器用于存储计算机执行指令，当网络设备运行时，处理器执行存储器存储的计算机执行指令，以使网络设备执行如第一方面及第一方面的任意一种可能的实现方式所述的方法。
第七方面，本发明实施例提供了一种网络设备，包括：处理器、存储器和至少一个网络接口；存储器用于存储计算机执行指令，当网络设备运行时，处理器执行存储器存储的计算机执行指令，以使网络设备执行如第二方面及第二方面的任意一种可能的实现方式所述的方法。
附图说明
为了更清楚地说明本发明的实施例或现有技术中的技术方案，下面将对描述背景技术和实施例时所使用的附图作简单的介绍。
图1是现有技术中的灵活以太网的业务传输示意图；
图2是本发明实施例提供的一种灵活以太网的业务传输示意图；
图3是本发明实施例提供的一种灵活以太网的业务传输示意图；
图4是本发明实施例提供的一种灵活以太网数据帧的结构示意图
图5a是本发明实施例提供的一种灵活以太网数据帧的开销块格式示意图；
图5b是本发明实施例提供的一种灵活以太网数据帧的控制块格式示意图；
图6是本发明实施例提供的一种灵活以太网业务复用的过程示意图；
图7是本发明实施例提供的一种发送业务的方法的示范性流程图；
图8是本发明实施例提供的一种空闲块分布示意图；
图9是本发明实施例提供的一种BE业务分布示意图；
图10a是本发明实施例提供的一种地图块的格式示意图；
图10b是本发明实施例提供的另一种地图块的格式示意图；
图11是本发明实施例提供的另一种BE业务分布的示意图；
图12是本发明实施例提供的一种掩码比特的格式示意图；
图13是本发明实施例提供的一种灵活以太网数据帧的开销块格式示意；
图14是本发明实施例提供的一种数据流重排的分布示意图；
图15是本发明实施例提供的另一种数据流重排的分布示意图；
图16a是本发明实施例提供的一种地图块的格式示意图；
图16b是本发明实施例提供的另一种地图块的格式示意图；
图17是本发明实施例提供的一种接收业务的方法的示范性流程图；
图18是本发明实施例提供的一种发送业务的装置结构示意图；
图19是本发明实施例提供的一种接收业务的装置结构示意图；
图20是本发明实施例提供的一种网络系统的结构示意图；
图21是本发明实施例提供的一种网络设备的结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。
本发明实施例提供的技术方案可以应用于灵活以太网中，还可以应用于其他类型的网络中，例如以太网、光传送网(Optical Transport Network，OTN)网络、同步数字体系(Synchronous Digital Hierarchy，SDH)网络等。本发明实施例主要以灵活以太网为例进行说明。
图2是本发明实施例提供的一种灵活以太网的业务传输示意图。如图2所示，网络设备Pa、Pb传输了三个业务C1、C2、C3。假设网络设备Pa、Pb中用于传输这三个业务的物理接口为一个100G的灵活以太网物理接口，该物理接口被划分为20个5G粒度的时隙。其中，业务C1带宽为10G，占用了2个时隙，时隙1和时隙2；业务C2带宽为25G，占用了5个时隙，时隙3～时隙7；业务C3带宽为25G，占用了5个时隙，时隙8～时隙12。如果业务C1、C2为分组业务，例如以太网业务，那么业务C1、C2可能包含空闲信息。空闲信息并不包含业务的数据信息，占用的时隙为空闲时隙，造成了时隙资源的浪费。因此，本发明实施例中，可以将业务的空闲信息占用的空闲时隙共享给其他的业务使用，例如尽力而为(Best Effort，BE)业务。图2中，BE业务可以使用业务C1和业务C2中的空闲时隙进行传输，即BE业务(BE业务1)和业务C1共享时隙1和时隙2，BE业务(BE业务2)和业务C2共享时隙3～时隙7。可选地，如图3所示，BE业务还可以部分(BE业务3)使用单独占用的时隙，例如未分配给其他业务的时隙13～时隙20，部分(BE业务1、BE业务2)使用业务C1、C2的空闲时隙。本发明实施例中的BE业务，可以为灵活以太网业务、分组业务(例如，以太网业务)、网际互连协议(Internet Protocol，IP)业务、光纤通道(Fibre Channel，FC)业务、无限带宽(InfiniBand)业务等。BE业务通常优先级比较低，在网络中存在优先级更高的业务时，不能一定保证满足BE业务的传输带宽，但是可以尽力而为地满足其传输带宽。因此，BE业务可以使用其他优先级更高的业务的空闲时隙或者空闲带宽来承载并传输，以提高网络资源的利用率。
当业务在灵活以太网物理接口上传输时，会形成具有灵活以太网数据帧格式的码块流。例如，一个100G的灵活以太网物理接口，可以划分为20个5G粒度的时隙。如图4所示，100G灵活以太网物理接口上形成的灵活以太网数据帧的结构包括8行，每行(1+20*1023)个码块。该数据帧结构一行为一个子帧，8行为一个基本帧，32行为一个超帧。这里的码块可以为64B/66B码块。其中，每行的第一个码块为开销块，其他20*1023个码块为净荷块。每行的净荷块可以以20个码块为单位，划分为1023个区段，每个区段的20个码块分别对应20个时隙。比如，每个区段中标识为1的码块对应时隙1，标识为2的码块对应时隙2，……，标识为20的码块对应时隙20。在整个灵活以太网数据帧中，包括8行净荷块，标识为1的各列码块对应时隙1，标识为2的各列码块对应时隙2，……，标识为20的各列码块对应时隙20。本发明实施例中，时隙为TDM传输时间片，可以对应一个灵活以太网数据帧的多列码块的位置，也可以对应连续的多个灵活以太网数据帧中的多列码块的位置。
其中，第一行的第一个码块，即整个数据帧的第一个开销块。如图5a所示，该开销块包含控制块类型“0x4B”加上“05”，用于指示该位置为灵活以太网数据帧的第一个开销块。
净荷块的块类型包括控制块和数据块，可以通过块类型标识。块类型可以包括2比特的同步头(Sync Header)，“01b”指示后面跟随的8个字节为数据字符，块类型为数据块；“10b”指示后面跟随的是控制字符和/或数据字符，块类型为控制块。进一步地，控制块中可以通过控制块类型字段标识控制块类型，现有技术中共有15种控制块类型。本发明实施例中，涉及到对空闲块的识别和处理，空闲块属于控制块中的一种。空闲块承载空闲信息，空闲信息实际上是冗余信息。空闲块是业务在独享物理接口时，当业务流量较低时对所在逻辑端口的带宽填充。逻辑端口可以看作是由若干时隙组成的，当逻辑端口中填充了空闲块时，空闲块对应的时隙为空闲时隙。可以通过特定的控制块类型来识别。如图5b所示的一种码块格式示意图，第一、二比特为同步头“01”，指示该码块为控制块。控制块类型“0x1E”可以标识的控制块类型包括错误指示块和空闲块。错误指示块中，控制块类型后面跟随的都是压缩为7个比特的“0x1E”；空闲块中，控制块类型后面跟随的都是压缩为7个比特的“0x00”。
本发明实施例中，以灵活以太网物理接口传输具有灵活以太网数据帧格式的业务为例进行说明。首先介绍下通过灵活以太网物理接口进行业务复用的实现过程。如图6所示，对两路业务C1、C2在4路100GE物理接口级联而成的400G灵活以太网物理接口组进行复用。400G的灵活以太网物理接口组可以划分为80个5G粒度的时隙，每个100GE物理接口可以划分为20个5G粒度的时隙。假设业务C1带宽为10G，占用2个时隙，业务C2带宽为25G，占用5个时隙。把两路业务C1、C2分发到80个时隙流中对应各自占用的时隙，然后把80个时隙流分别发送到400G灵活以太网接口组中对应的物理接口。例如，业务C1分发到其占用的两个时隙之后，发送到灵活以太网物理接口A中；业务C2分发到其占用的五个时隙后，发送到灵活以太网物理接口B和C。即，业务C1通过物理接口A传输到物理链路中，业务C2通过物理接口B、C传输到物理链路中。本发明实施例中，发送端网络设备执行的方法可以在上述业务复用的过程中执行，还可以在上述业务复用之前或之后执行。当然，本发明实施例可以和上述业务复用的过程不产生任何联系，下面把业务复用的过程和本发明实施例结合进行描述，仅是作为一个例子进行说明。
图7为本发明实施例提供的一种发送业务的方法的示范性流程图。该方法可以由灵活以太网设备、以太网设备等网络设备执行，该网络设备可以为发送端网络设备。包括如下步骤：
S11，网络设备接收至少一路业务，所述至少一路业务包括尽力而为BE业务。
至少一路业务中可以包括BE业务，还可以包括带宽独享的业务(例如，图2中的业务C1、C2、C3)。带宽独享的业务通常来说优先级比BE业务的优先级高，因此网络设备会根据业务的带宽需求分配足以承载该业务的带宽资源，能够确保满足其带宽的需求。例如，带宽独享的业务为以太网业务，该业务中可能包含空 闲信息，由于空闲信息不包含业务的数据信息，但同样需要占用时隙，则会产生空闲时隙资源。此时，BE业务可以利用带宽独享的业务的空闲时隙资源进行承载并传输。但是，由于带宽独享的业务的空闲时隙资源具有不确定性，因此不一定能确保这些空闲时隙资源能够满足BE业务的带宽的需求，但可以尽力而为地为BE业务提供带宽。可选地，BE业务还可以使用带宽独享的业务释放的带宽进行传输。网络设备接收到BE业务后，可以暂时进行缓存，等到接收到带宽独享的业务之后，然后对BE业务执行S12-S14。
S12，获取原始数据流，识别所述原始数据流中的第一空闲块和第二空闲块，将所述BE业务插入到所述第一空闲块所在的位置。
原始数据流可以是由带宽独享的业务转化而成的。例如，网络设备接收至少一路带宽独享的业务，将所述至少一路带宽独享的业务转化为所述原始数据流。其中，带宽独享的业务可以和BE业务同时接收，也可以和BE业务在不同的时刻分别接收。
在一个例子中，该步骤可以在如图6所示的业务复用的过程中执行。S11中的至少一路业务包括BE业务和带宽独享的业务。BE业务和带宽独享的业务是在同一时刻接收的，或者是不同的时刻接收的。BE业务可以和带宽独享的业务一起进行复用，即在业务进行复用的同时执行本发明实施例的技术方案。复用的过程可以参考如图6所示的实施例，此处不再赘述。
在另外一个例子中，该步骤可以在如图6所示的业务复用之后执行。在执行S12之前，网络设备可以接收至少一路带宽的独享业务，并对至少一路带宽独享的业务进行复用，形成原始数据流。复用的过程可以参考如图6所示的实施例，此处不再赘述。其中，至少一路带宽独享的业务可以和BE业务一起接收的，也可以是单独接收的。
S13，生成业务分布指示地图，将所述业务分布指示地图插入到所述第二空闲块所在的位置，所述业务分布指示地图用于指示所述第一空闲块的位置，所述第二空闲块所在的位置通过预设的地图块类型标识。
识别所述原始数据流的第一空闲块和第二空闲块的实施方式可以为：识别所述原始数据流的至少两个空闲块，所述至少两个空闲块包括第一空闲块和第二空闲块。其中，第二空闲块可以为至少两个空闲块的其中一个或多个空闲块，用于承载空闲块分布指示地图和/或业务分布指示地图；第一空闲块可以为除了第二空闲块之外的其余空闲块，用于承载BE业务。即，将第一空闲块替换为携带BE业务的码块(称为“BE业务块”)，将第二空闲块替换为携带空闲块分布指示地图和/或业务分布指示地图的码块(称为“地图块”)。其中，第一空闲块、第二空闲块还可以为原始数据流中(例如，带宽独享的业务形成的数据流)包含冗余信息的码块，例如ERROR块等。
其中，识别所述原始数据流中的至少两个空闲块可以为：所述原始数据流中获取第一区段数据流，识别所述第一区段数据流中的空闲块，得到至少两个空闲块，所述空闲块携带空闲块类型。识别所述原始数据流的至少两个空闲块之后， 还包括：生成空闲块分布指示地图，所述空闲块分布指示地图用于指示所述至少两个空闲块和/或非空闲块的位置。
原始数据流中包括空闲块“/I/”和非空闲块“D/C”。原始数据流可以是经过编码后的数据流，还可以是未编码的数据流。编码后的数据流可以是64B/66B编码，还可以是8B/10B编码、512B/514B编码等。可以针对具体的数据流格式，识别数据流的空闲块，本发明实施例中以数据流是64B/66B编码为例进行说明。例如参见图5b，可以通过空闲块类型，例如同步头(10)、控制块类型(0x1E)，以及控制块类型后面跟随的至少一个0x00，识别出数据流中的空闲块“/I/”。
下面结合具体的例子进行说明，例如，可以对业务复用后的数据流进行检测：在图6中，针对400G灵活以太网物理接口中的每一个物理接口发送的原始数据流，参照灵活以太网数据帧的格式，从第一个开销块后的第一个码块开始，依次连续取20个码块作为一个区段数据流，形成如图8所示的空闲块分布图。上述第一区段数据流可以是原始数据流中连续20个码块形成的区段数据流。由于灵活以太网的数据帧格式可以划分为20个时隙，取20个码块刚好可以对应20个时隙。如图8所示，每一行均具有20个码块，其中，20个码块可以全部为非空闲块“D/C”，或者全部为空闲块“/I/”，还可以为空闲块和非空闲块的组合。图8中示出了一些空闲块分布的例子，实际中还可以包含更多的分布情况。
图8中，空闲块分布指示地图可以采用20个比特表示对应的20个码块中空闲块和非空闲块的位置分布情况。空闲块分布指示地图可以指示空闲块的位置分布和数量，也可以指示非空闲块的位置分布和数量。所述空闲块分布指示地图包括第一比特和第二比特，所述第一比特指示空闲块，所述第二比特指示非空闲块。例如，图8中，通过比特“0”指示空闲块，比特“1”指示非空闲块。可选地，空闲块分布指示地图还可以使用两个比特或以上指示一个码块。例如，通过“00”指示空闲块，通过“01”指示非空闲块。
如图9所示，在原始数据流中取20个码块为一个区段数据流，各个区段数据流中有的不包含空闲块，有的包含一个空闲块，或者有的包含两个以上空闲块。当区段数据流中的空闲块包含至少两个时，可以在其中的一个空闲块(第二空闲块)的位置插入空闲块分布指示地图和/或业务分布指示地图，形成地图块；在其余的空闲块(第一空闲块)的位置插入BE业务，形成BE业务块。对于只包含一个空闲块或者不包含空闲块的区段数据流，可以不使用其进行承载BE业务，也不需要承载空闲块分布指示地图和/或业务分布指示地图，例如图9中未被使用的空闲块“/I/”。业务分布指示地图可以指示第一空闲块的位置，即BE业务块的位置；空闲块分布指示地图可以指示空闲块的位置，包括第一空闲块和第二空闲的位置。业务分布指示地图可以由空闲块分布指示地图生成的。业务分布指示地图和空闲块分布指示地图包含的比特数量和比特取值可以是相同的。业务分布指示地图的生成可以在插入BE业务执行，也可以在插入BE业务之后执行，本发明不作限定。
本发明实施例所述的“位置”指的是相对位置。两个块(例如两个空闲块)之间的相对位置可以是不变的。例如，第一行的区段数据流中，第一个空闲块和 第二个空闲块之间相隔了八个非空闲块，在数据传输的过程中，这两个空闲块之间的相对位置可以是不变的。所述第二空闲块所在的位置通过预设的地图块类型标识。如图10a所示，地图块类型可以包括同步头“10”、控制块类型“4B”以及“0xA”。通过D1、D2、D3三个字节共24个比特，可以任意取其中20个比特携带业务分布指示地图和/或空闲块分布指示地图。值得说明的是，地图块类型可以采用其他的标识方式，只要和现有技术中64B/66B编码的15种控制块类型形成区别，并满足物理接口的码块类型定义的约束要求即可。例如，如图10b所示，本发明实施例定义了一种新的控制块类型“0x00”。可以通过D0～D6七个字节共56个比特来携带业务分布指示地图和/或空闲块分布指示地图。
所述识别所述原始数据流中的第一空闲块和第二空闲块，还可以包括：从所述原始数据流中获取第二区段数据流，识别所述第二区段数据流中的至少两个空闲块，所述至少两个空闲块包括所述第一空闲块和所述第二空闲块；通过预设的参与信息指示所述第二区段数据流的位置。
可选地，可以对部分时隙预先指定为不参与空闲块(包括第一空闲块和第二空闲块)识别的时隙(下文简称“不参与时隙”)。如图11所示，时隙3和时隙4为指定不参与时隙，可以不必识别这两个时隙对应的码块是否为空闲块。其中，这两个时隙对应的两列码块包含的空闲块“/I/”为未被使用的空闲块，即不参与时隙对应的空闲块，不携带空闲块分布指示地图和/业务分布指示地图，也不携带BE业务。
一个例子中，预设的参与信息可以在业务分布指示地图中表示。例如，通过“00”指示第一空闲块，通过“01”指示非空闲块，通过“10”指示不参与时隙对应的空闲块。预设的参与信息也可以携带在空闲块分布指示地图中，例如，通过“00”指示第一空闲块和第二空闲块，通过“01”指示非空闲块，通过“10”指示不参与时隙对应的空闲块。
另一个例子中，预设的参与信息也可以通过掩码操作后的空闲块分布指示地图表示。可选地，还可以对业务分布指示地图进行掩码操作，原理类似。例如，发送端设备通过第二空闲块所在的位置承载空闲块分布指示地图，接收端设备使用如图12所示的掩码比特对空闲块分布指示地图进行掩码操作。例如，图12为一段20比特的掩码比特，第三、四比特均为“1”，表示不参与时隙；其他比特均为“0”，表示参与时隙。使用该20个掩码比特和一个20个码块的区段数据流的空闲块分布指示地图(1标识非空闲块，0标识空闲块)进行“相或”掩码操作，可以使空闲块分布指示地图的第三、四个比特在非0的情况下设置为1，即这两个比特对应的码块的位置不能插入BE业务，也不能插入业务分布指示地图或空闲块分布指示地图。
可选地，还可以直接传输掩码比特作为预设的参与信息。如表1所示，不参与时隙可以通过比特“0”指示，参与时隙通过比特“1”指示。或者，不参与时隙通过比特“1”指示，参与时隙通过比特“0”指示。
表1
时隙编 是否不参与时隙 比特0指示不 比特1指示不
号   参与时隙 参与时隙
1 否 1 0
2 否 1 0
3 是 0 1
4 是 0 1
5 否 1 0
6 否 1 0
7 否 1 0
8 否 1 0
9 否 1 0
10 否 1 0
11 否 1 0
12 否 1 0
13 否 1 0
14 否 1 0
15 否 1 0
16 否 1 0
17 否 1 0
18 否 1 0
19 否 1 0
20 否 1 0
不参与时隙传输的频率在不同的应用场景中可以不相同：
如果不参与时隙为静态配置的，即不参与时隙是固定不变的，预设的参与信息可以不必实时传输。预设的参与信息可以直接配置在发送端网络设备和接收端网络设备上，例如通过网管配置；或者也可以在业务传输开始之前，预设的参与信息通过灵活以太网数据帧的开销块进行携带等。
如果不参与时隙为动态配置的，即不参与时隙是实时变化的，预设的参与信息最好携带在数据流中实时传输。可以通过地图块进行携带，例如，可以在业务分布指示地图中进行掩码，或者直接传输掩码比特等。
如果不参与时隙为半动态配置的，即不参与时隙在一段时间内不变，预设的参与信息还可以周期性地传输。例如，当不参与时隙在灵活以太网的帧边界发生变化时，由时隙3、4变为时隙5、6，可以在灵活以太网的数据帧的开销块中携带预设的参与信息。从图4中可以看出，每1023个20码块就会出现一个开销块。如图13所示，可以利用灵活以太网数据帧的第二个开销和/或第三个开销块的保留字段(Reserved)来携带掩码比特等预设的参与信息。
上述应用场景中，预设的参与信息可以为掩码比特，也可以通过掩码操作后的空闲块分布指示地图或业务分布指示地图表示。例如，图10a中，除了D1、D2、D3之外，还有28个保留比特可以使用。在空闲块分布指示地图或业务分 布指示地图中通过“10”或掩码操作指示不参与时隙对应的空闲块；或者采用保留比特来携带掩码比特等。
可选地，还可以预先指定参与空闲块识别的时隙(简称“参与时隙”)，例如，图11中指定除了时隙3、4之外的其他时隙，实现原理类似，不再赘述。
可选地，可以将不参与时隙部分或者全部分配给BE业务作为单独占用的时隙，该单独占用的时隙为BE业务的基本保证带宽。BE业务的实际带宽可能超过基本保证带宽，即还可以占用其他业务的空闲时隙资源。BE业务插入到第一空闲块所在的位置和/或基本保证带宽对应的码块位置时，可以在区段数据流中按照从左往右的顺序进行插入。
将所述第二空闲块(或地图块)所在的位置调整为所述第一区段数据流或所述第二区段数据流中的第一位置。为了使接收端网络设备快速地获取到BE业务，还可以对插入BE业务后的区段数据流进行重排。可选地，也可以先对区段数据流进行重排，然后再插入BE业务。一个例子中，如图14所示，将第二空闲块(或地图块)放置于第一个位置，然后依次放置非空闲块和第一空闲块(或BE业务块)。或者，也可以先放置第一空闲块(或BE业务块)，再放置非空闲块。对于不用于承载BE业务的区段数据流，例如第三行、第四行的区段数据流，可以不进行重排。另一个例子中，如图15所示，可以交换第一个码块和第二空闲块的位置，使得第二空闲块(或地图块)固定在第一个位置出现。可选地，第二空闲块(或地图块)还可以设置于其他固定的位置上。
S14，发送携带所述BE业务和所述业务分布指示地图的数据流。
本发明实施例中，可选地，在S12中，还可以在400G的灵活以太网物理接口组中各个物理接口上，从灵活以太网数据帧的第一个开销块之后的第一个码块开始，依次连续取40个码块作为一个区段数据流。可选地，还可以在一个100G的灵活以太网物理接口中自第一个开销块后的第一个码块，依次连续取50个码块作为一个区段数据流。可选地，还可以连续取5个码块、10个码块等作为一个区段数据流。本发明不作限定。
参见图10a，D1、D2、D3共24个比特，加上保留的28个比特共52个比特，可以承载40个比特的业务分布指示地图和/或空闲块分布指示地图。当区段数据流的码块数量超过52时，可以使用至少两个码块来承载业务分布指示地图和/或空闲块分布指示地图。如图10b中的地图块，可以承载56个比特业务分布指示地图和/或空闲块分布指示地图。当区段数据流的码块数量超过56时，可以使用至少两个码块来承载业务分布指示地图和/或空闲块分布指示地图。可选地，还可以通过同步头为“01”的数据码块来承载业务分布指示地图和/或空闲块分布指示地图。
当使用至少两个码块来承载业务分布指示地图和/或空闲块分布指示地图时，可以通过指针字段指示一个或多个地图块的位置。例如，图16a中，在至少两个地图块中的第一个地图块上增加了MapEx字段，用于标识除了第一个地图块之外的其他地图块的位置。使用包括控制块类型“4B”以及“0xA”的地图块类型标识第一个地图块。MapEx可以为一个指针，用于指示其余地图块的位置；也 可以通过第一个地图块的MapEx指示第二个地图块的位置，通过第二个地图块的MapEx指示第三个地图块的位置，依次类推。可选地，还可以使用其他的地图块类型标识第一个地图块，例如控制块类型“0x00”，还可以增加一个区段长度指示字段，L Indicator，用于标识区段数据流的长度L，例如80。可选地，还可以不使用MapEx指针，直接对所有地图块使用地图块类型标识。
如果区段数据流的长度为L，则区段数据流的边界位置相对于灵活以太网数据帧的边界位置可能存在不确定性。例如，L为50时，区段数据流的边界相对于20*1023码块长度的子帧、20*1023*8码块长度的基本帧、20*1023*8*32码块长度的超帧都存在边界位置对齐问题。即一个灵活以太网帧内第一个区段数据流的第一个码块的位置可能在该灵活以太网帧的第pi个码块上，L≥pi≥1。因此，可能需要在灵活以太网的开销中增加一个区段边界指针pi。例如在灵活以太网数据帧的开销中定义6比特的边界指针字段(0～63)来指示当前帧中的第一个区段数据流的开始位置等。
可选地，在灵活以太网中，存在多个物理接口级联成一个物理接口组的情况，区段数据流可以在多个物理接口上并行获取。例如，由n路物理接口级联而成的一个灵活以太网物理接口组中，在每个物理接口中取k个码块，区段数据流长度为L＝n*k个码块。例如，4路100G的物理接口，每路取20个码块，n＝4,k＝20，n*k＝80。值得说明的是，n*k越大，其中出现两个以上空闲块的概率越高，即可以插入BE业务的概率越大。在多个物理接口上并行获取区段数据流，有利于提升带宽利用效率，并且降低处理延迟。区段数据流可以参照灵活以太网数据帧的边界，即灵活以太网数据帧的第一个开销块确定区段边界。
本发明实施例中，网络设备获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；将所述第一数据流插入到所述第二数据流中，生成第三数据流；所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；发送所述第三数据流。本发明实施例的技术方案可以通过如图7所示的方法流程实现。例如，第一数据流可以为BE业务形成的数据流，第二数据流可以为带宽独享的业务形成的原始数据流，第一信息块可以为BE业务块，第二信息块可以为地图块，第一数据流分布指示地图可以为空闲块分布指示地图和/或业务分布指示地图。但本发明实施例的实现方式不限于图7所示的方法流程。例如，在S12中，可以不需要对空闲块进行识别，而是在带宽独享的业务形成原始数据流的过程中，确定需要生成空闲块的位置，在需要生成空闲块的位置插入BE业务和业务分布指示地图。
本发明实施例中，通过带宽独享的业务的空闲块或冗余信息块承载BE业务，充分利用了带宽独享的业务的空闲时隙，提高了带宽利用率，在灵活以太网中实现了业务的统计复用。
图17为本发明实施例提供的一种接收业务的方法的示范性流程图。该方法可 以由灵活以太网设备、以太网设备等网络设备执行，该网络设备可以为接收端网络设备。本发明实施例中，接收端网络设备执行的方法可以在业务解复用的过程中执行，也可以在业务解复用之前或之后执行。业务解复用的过程和图6所示的复用过程互为逆向过程，此处不再赘述。当然，本发明实施例的案可以和业务解复用的过程不产生任何联系，下面把业务解复用的过程和本发明实施例结合进行描述，仅是作为一个例子进行说明。该方法包括如下步骤：
S21，网络设备接收携带BE业务和业务分布指示地图的数据流。
携带BE业务和业务分布指示地图的数据流中还可以携带带宽独享的业务，BE业务可以是通过带宽独享的业务的空闲时隙进行携带的。BE业务如何通过带宽独享的业务的空闲时隙进行携带可以参见图7所示的实施例。
S22，在第二信息块中获取所述业务分布指示地图，所述业务分布指示地图用于指示第一信息块的位置，所述第二信息块通过预设的地图块类型标识。
在一个例子中，该步骤可以是在业务解复用的过程中执行。即对接收的数据流进行解复用的同时，执行本发明的技术方案。
在另一个例子中，该步骤可以在业务解复用之前执行。即先将BE业务从接收到的数据流中提取出来，再对带宽独享的业务进行解复用。
第一信息块可以为携带BE业务的BE业务块，第二信息块可以为携带业务分布指示地图的地图块。在第二信息块中获取所述业务分布指示地图的实施方式可以包括：从所述携带BE业务和业务分布指示地图的数据流中获取第一区段数据流；识别所述第一区段数据流中的地图块类型，在所述地图块类型所在的第二信息块中获取所述业务分布指示地图。
需要说明的是，第一区段数据流可以和发送端网络设备选取的长度相同，也可以不同。地图块类型、在地图块中获取业务分布指示地图可以参见图10a、图10b所示的实施例，此处不再赘述。
可选地，网络设备还可以获取预设的参与信息，根据所述预设的参与信息从所述携带BE业务和业务分布指示地图的数据流中获取第二区段数据流，所述预设的参与信息指示所述第二区段数据流的位置。如果发送端网络设备在第一区段数据流中指定了部分不参与空闲块识别的时隙(不参与时隙)，接收端网络设备需要根据发送端网络设备的指定规则获取预设的参与信息，根据预设的参与信息从第二区段数据流(参与时隙)中获取业务分布指示地图和BE业务。发送端网络设备指定不参与时隙的规则可以参见图11、12、13所示的实施例，此处不再赘述。
所述在第二信息块中获取所述业务分布指示地图，包括：从所述第一区段数据流或所述第二区段数据流中的第一位置获取所述业务分布指示地图。如果发送端网络设备对区段数据流进行了重排(参见图14、15所示的实施例)，接收端网络设备可以根据发送端重排的规则，从第一区段数据流或第二区段数据流中预设的第一位置中获取业务分布指示地图。
所述业务分布指示地图通过第一比特标识所述第一信息块的位置。例如，如图9所示，通过比特“0”标识用于插入BE业务的第一信息块的位置。
S23，根据所述业务分布指示地图，在所述第一信息块中获取所述BE业务。
业务分布指示地图能够指示BE业务所在的位置，例如通过比特“0”指示。如果业务分布指示地图对第一信息块所在的位置和第二信息块所在的位置采用相同的比特(例如“0”)进行指示，则先根据地图块类型识别出第二信息块，在第二信息块中获取业务分布指示地图，在业务分布指示地图中将第二信息块的位置排除后得到第一信息块的位置。
S24，将所述携带BE业务和业务分布指示地图的数据流恢复为原始数据流。
本发明实施例中，在所述第一信息块和所述第二信息块所在的位置生成至少两个空闲块，所述空闲块携带空闲块类型。在第二信息块中提取出业务分布指示地图之后，以及将在第一信息块中提取出BE业务之后，可以分别在第二信息块、第一信息块的位置生成空闲块。由于BE业务占用了带宽独享的业务的空闲时隙(空闲块的位置)进行传输，将BE业务块和地图块恢复为原来的空闲块，即恢复了只携带带宽独享业务的原始数据流。空闲块的字段格式可以参见图5b所示的实施例。
本发明实施例中，网络设备接收第三数据流；从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。本发明实施例的技术方案可以通过如图17所示的方法流程实现，例如，第三数据流可以为携带BE业务和业务分布指示地图的数据流，第一数据流可以为BE业务形成的数据流，第二数据流可以为带宽独享的业务形成的原始数据流，第一信息块可以为BE业务块，第二信息块可以为地图块，第一数据流分布指示地图可以为业务分布指示地图。但本发明实施例的实现方式不限于图17所示的方法流程。例如，在S21中，BE业务和业务分布指示地图可以从不同的数据流中接收。
本发明实施例中，通过带宽独享的业务的空闲块或冗余信息块承载BE业务，从带宽独享的业务中提取BE业务。充分利用了带宽独享的业务的空闲时隙，提高了带宽利用率，在灵活以太网中实现了业务的统计复用。
本发明实施例提供的技术方案，除了应用于灵活以太网中，还可以应用于其他的网络类型中，例如，以太网、OTN、SDH等。当前，灵活以太网采用64B/66B编码对数据流进行编码，实际上，未编码的数据流或者解码后的数据流中的一个8字节的字节组可以与一个64B/66B编码相对应。例如，在以太网的MII(Media Independent Inteface，媒质不相关接口)接口中，MII接口数据可以为未编码或解码后的字符。按照不同的接口速率，MII接口可以为1Gbps媒质不相关接口(1000Mbps Media Independent Inteface，GMII)、10Gbps媒质不相关接口(10Gbps Media Independent Inteface，XGMII)、40Gbps媒质不相关接口(40Gbps Media Independent Inteface，XLGMII)、100Gbps媒质不相关接口(100Gbps Media Independent Inteface，CGMII)、400Gbps媒质不相关接口(400Gbps Media  Independent Inteface，CDGMII)等。如表2所示，前两列为MII接口数据字符，包括发送(字符)控制(信号)(Transmit(character)Control(signals)，TXC)/接收(字符)控制(信号)(Received(character)Control(signals)，RXC)、发送(字符)数据(Transmit(character)Data，TXD)/接收(字符)数据(Received(character)Data，RXD)。每一对<TXC，TXD>或<RXC，RXD>可以和64B/66B编码的一种编码块类型相对应。例如，TXC/RXC为“0b1”，TXD/RXD为“0x07”时，对应的是空闲块。在进行64B/66B编码时，TXD/RXD的“0x07”被压缩为7个比特的“0x00”。
表2
Figure PCTCN2017080316-appb-000001
表2中存在多种保留字符(灰色部分)，可以取任意一种保留字符来承载业务分布指示地图和/或空闲块分布指示地图。例如，如表3所示，可以取MII接口数据字符<TXC,TXD>或者<RXC,RXD>为<0b1,0xFF>，与具有64B/66B编码格式的地图块建立映射关系。因此，还可以基于MII接口数据字符等非编码字符实现本发明实施例的技术方案。当然，本发明实施例还可以兼容其他的编码格式，例如8B/10B编码、512B/514B编码等。
表3
Figure PCTCN2017080316-appb-000002
图18为本发明实施例提供的一种发送业务的装置的结构示意图。该装置可以为灵活以太网设备、以太网设备、OTN设备、SDH设备等。如图18所示，该装置可以包括：获取模块101、处理模块102和发送模块103。本发明实施例中，对各个功能模块进行逻辑上的划分，划分的方式不唯一。例如，各个模块可以为独立的电路模块，还可以为集成到一个电路模块中。各个模块可以通过芯片等集成电路的形式实现。本发明实施例的发送业务的装置可以执行如图7所示实施例的方法步骤。
其中，获取模块101，用于获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；
处理模块102，用于将所述第一数据流插入到所述第二数据流中，生成第三数据流；
所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；
所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；
发送模块103，用于发送所述第三数据流。
本发明实施例中，通过带宽独享的业务的空闲块或冗余信息块承载BE业务，充分利用了带宽独享的业务的空闲时隙，提高了带宽利用率，在灵活以太网中实现了业务的统计复用。
图19为本发明实施例提供的一种接收业务的装置的结构示意图。该装置可以 为灵活以太网设备、以太网设备、OTN设备、SDH设备等。如图19所示，该装置可以包括：接收模块201和处理模块202。本发明实施例中，对各个功能模块进行逻辑上的划分，划分的方式不唯一。例如，各个模块可以为独立的电路模块，还可以为集成到一个电路模块中。各个模块可以通过芯片等集成电路的形式实现。本发明实施例的发送业务的装置可以执行如图17所示实施例的方法步骤。
其中，接收模块201，用于接收第三数据流；
处理模块202，用于从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；
所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；
所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。
本发明实施例中，通过带宽独享的业务的空闲块或冗余信息块承载BE业务，从带宽独享的业务中提取BE业务。充分利用了带宽独享的业务的空闲时隙，提高了带宽利用率，在灵活以太网中实现了业务的统计复用。
图20为本发明实施例提供的一种网络系统的结构示意图。该网络系统可以为灵活以太网、以太网、OTN、SDH网络等。如图20所示，该网络系统可以包括至少两个网络设备，例如网络设备301、网络设备302。每一个网络设备可以为发送端网络设备，也可以为接收端网络设备，可以具有如图18和/或图19所示的结构。
图21为本发明是实施例提供的一种网络设备的结构示意图。该网络设备可以为灵活以太网设备、以太网设备、OTN设备、SDH设备等。如图21示，网络设备400可以包括：处理器401、存储器402、至少一个网络接口(例如网络接口403、网络接口404)、解复用芯片405和复用芯片406。如果网络设备包含发送功能和接收功能，可以包括解复用芯片405和复用芯片406；如果网络设备只包含发送功能，可以只包括复用芯片406；如果网络设备只包含接收功能，可以只包含解复用芯片405。
处理器401可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，网络处理器(Network Processing Unit，NPU)，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者至少一个集成电路，用于执行相关程序，以实现本发明实施例所提供的技术方案。
存储器402可以是只读存储器(Read Only Memory，ROM)，静态存储设备，动态存储设备或者随机存取存储器(Random Access Memory，RAM)。存储器402可以存储操作系统和其他应用程序。在通过软件或者固件来实现本发明实施例提供的技术方案时，用于实现本发明实施例提供的技术方案的程序代码保存在存储器402中，并由处理器401来执行。
网络接口403、404使用例如但不限于收发器一类的收发装置，来实现网络设备400与其他设备或通信网络之间的通信。例如，网络接口403可以具有发送功能或接收功能，也可以同时具有发送功能和接收功能。这里，网络接口403、404 可以为逻辑端口(例如由若干时隙形成的逻辑端口)，也可以为物理接口(例如100G的灵活以太网物理接口)。
解复用芯片405和复用芯片406，可以通过ASIC、现场可编程逻辑门阵列(Field－Programmable Gate Array，FPGA)等实现。可以为实现本发明技术方案的专用芯片，还可以为包含本发明技术方案功能的通用芯片。解复用芯片405，用于对接收到的BE业务进行解复用，复用芯片406，用于对BE业务进行复用并发送。
一个例子中，网络设备400通过网络接口403或404接收至少一路业务，所述至少一路业务包括尽力而为BE业务。网络设备400通过处理器401执行保存于存储器402的代码，或者复用芯片406执行自身存储的代码，在复用芯片406上执行：网络设备获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；将所述第一数据流插入到所述第二数据流中，生成第三数据流；所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；发送所述第三数据流。
另一个例子中，网络设备400通过网络接口403或404接收携带尽力而为BE业务的数据流。网络设备400通过处理器401执行保存于存储器402的代码，或者解复用芯片405执行自身存储的代码，在解复用芯片405上执行：网络设备接收第三数据流；从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。
具体地，通过图21所示的网络设备400可以实现本发明任意一个实施例的技术方案。应注意，尽管图21所示的网络设备400仅仅示出了处理器401、存储器402、网络接口403、404、解复用芯片405、复用芯片406，但是在具体实现过程中，本领域的技术人员应当明白，网络设备400还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，网络设备400还可包含实现其他附加功能的硬件器件。例如，网络设备400还包括电源、风扇、时钟单元、主控单元等。此外，本领域的技术人员应当明白，网络设备400也可仅仅包含实现本发明实施例所必须的器件，而不必包含图21中所示的全部器件。
本发明实施例中，可以在带宽独享的业务形成的原始数据流的空时隙中插入BE业务，提高了网络带宽资源的利用率。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (27)

  1. 一种发送业务的方法，其特征在于，所述方法包括：
    网络设备获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；
    将所述第一数据流插入到所述第二数据流中，生成第三数据流；
    所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；
    所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；
    发送所述第三数据流。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    获取所述第二数据流，识别所述第二数据流的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块。
  3. 如权利要求2所述的方法，其特征在于，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块，包括：
    将所述第一数据流插入到所述第一信息块；
    根据所述第一信息块的位置生成所述第一数据流分布指示地图，将所述第一数据流分布指示地图插入到所述第二信息块。
  4. 如权利要求2所述的方法，其特征在于，所述识别所述第二数据流中的至少两个空闲块，包括：
    从所述第二数据流中获取第一区段数据流，识别所述第一区段数据流中的空闲块，得到至少两个空闲块，所述空闲块携带空闲块类型。
  5. 如权利要求2-4任一所述的方法，其特征在于，所述识别所述第二数据流的至少两个空闲块之后，还包括：
    生成空闲块分布指示地图，所述空闲块分布指示地图用于指示所述至少两个空闲块和/或非空闲块的位置；
    根据所述空闲块分布指示地图生成所述第一数据流分布指示地图。
  6. 如权利要求1-5任一所述的方法，其特征在于，所述方法还包括：
    从所述第二数据流中获取第二区段数据流，识别所述第二区段数据流中的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和所述第二信息块；
    通过预设的参与信息指示所述第二区段数据流的位置。
  7. 如权利要求5所述的方法，其特征在于，所述方法还包括：
    将所述第二信息块所在的位置调整为所述第一区段数据流或所述第二区段数据流中的第一位置。
  8. 一种接收业务的方法，其特征在于，所述方法包括：
    网络设备接收第三数据流；
    从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；
    所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；
    所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。
  9. 如权利要求8所述的方法，其特征在于，所述从所述第三数据流中提取第一数据流，包括：
    从所述第三数据流中获取第一区段数据流或第二区段数据流；
    识别所述第一区段数据流或第二区段数据流中的第二信息块，从所述第二信息块中获取所述第一数据流分布指示地图；
    根据所述第一数据流分布指示地图，从所述第一信息块中获取所述第一数据流。
  10. 如权利要求9所述的方法，其特征在于，所述方法还包括：
    获取预设的参与信息，根据所述预设的参与信息从所述第三数据流中获取所述第二区段数据流，所述预设的参与信息指示所述第二区段数据流的位置。
  11. 如权利要求9或10所述的方法，其特征在于，所述从所述第三数据流中提取第一数据流，包括：
    从所述第一区段数据流或所述第二区段数据流中的第一位置获取所述第一数据流分布指示地图。
  12. 如权利要求8-11任一所述的方法，其特征在于，所述第一数据流分布指示地图通过第一比特标识所述第一信息块的位置。
  13. 如权利要求8-12任一所述的方法，其特征在于，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成，包括：
    在所述第一信息块和所述第二信息块所在的位置生成至少两个空闲块，所述空闲块携带空闲块类型。
  14. 一种发送业务的装置，其特征在于，所述装置包括：
    获取模块，用于获取至少两路数据流，所述至少两路数据流包括第一数据流和第二数据流；
    处理模块，用于将所述第一数据流插入到所述第二数据流中，生成第三数据流；
    所述第三数据流包含第一信息块和第二信息块，所述第一信息块和所述第二信息块由所述第二数据流生成；
    所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识；
    发送模块，用于发送所述第三数据流。
  15. 如权利要求14所述的装置，其特征在于，所述处理模块，还用于：
    获取所述第二数据流，识别所述第二数据流的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和第二信息块。
  16. 如权利要求15所述的装置，其特征在于，所述处理模块，用于：
    将所述第一数据流插入到所述第一信息块；
    根据所述第一信息块的位置生成所述第一数据流分布指示地图，将所述第一数据流分布指示地图插入到所述第二信息块。
  17. 如权利要求15所述的装置，其特征在于，所述处理模块，用于：
    从所述第二数据流中获取第一区段数据流，识别所述第一区段数据流中的空闲块，得到至少两个空闲块，所述空闲块携带空闲块类型。
  18. 如权利要求15-17任一所述的装置，其特征在于，所述处理模块，还用于：
    生成空闲块分布指示地图，所述空闲块分布指示地图用于指示所述至少两个空闲块和/或非空闲块的位置；
    根据所述空闲块分布指示地图生成所述第一数据流分布指示地图。
  19. 如权利要求14-18任一所述的装置，其特征在于，所述处理模块，还用于：
    从所述第二数据流中获取第二区段数据流，识别所述第二区段数据流中的至少两个空闲块，在所述至少两个空闲块的位置生成所述第一信息块和所述第二信息块；
    通过预设的参与信息指示所述第二区段数据流的位置。
  20. 如权利要求18所述的装置，其特征在于，所述处理模块，还用于：
    将所述第二信息块所在的位置调整为所述第一区段数据流或所述第二区段数据流中的第一位置。
  21. 一种接收业务的装置，其特征在于，所述装置包括：
    接收模块，用于接收第三数据流；
    处理模块，用于从所述第三数据流中提取第一数据流，将所述第三数据流恢复为第二数据流；
    所述第三数据流包含第一信息块和第二信息块，所述第二数据流通过所述第一信息块和所述第二信息块恢复生成；
    所述第一信息块用于承载所述第一数据流；所述第二信息块用于承载第一数据流分布指示地图，所述第一数据流分布指示地图用于指示所述第一信息块的位置，所述第二信息块通过预设的地图块类型标识。
  22. 如权利要求21所述的装置，其特征在于，所述处理模块，用于：
    从所述第三数据流中获取第一区段数据流或第二区段数据流；
    识别所述第一区段数据流或第二区段数据流中的第二信息块，从所述第二信息块中获取所述第一数据流分布指示地图；
    根据所述第一数据流分布指示地图，从所述第一信息块中获取所述第一数据流。
  23. 如权利要求22所述的装置，其特征在于，所述处理模块，还用于：
    获取预设的参与信息，根据所述预设的参与信息从所述第三数据流中获取所述第二区段数据流，所述预设的参与信息指示所述第二区段数据流的位置。
  24. 如权利要求22或23所述的装置，其特征在于，所述处理模块，还用于：
    从所述第一区段数据流或所述第二区段数据流中的第一位置获取所述第一数据流分布指示地图。
  25. 如权利要求21-24任一所述的装置，其特征在于，所述第一数据流分布指示地图通过第一比特标识所述第一信息块的位置。
  26. 如权利要求21-25任一所述的装置，其特征在于，所述处理模块，用于：
    在所述第一信息块和所述第二信息块所在的位置生成至少两个空闲块，所述空闲块携带空闲块类型。
  27. 一种网络系统，其特征在于，所述系统包括如权利要求14-20任一所述的装置，以及如权利要求21-26任一所述的装置。
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