WO2019128462A1 - 一种数据传输方法、发送装置及接收装置 - Google Patents
一种数据传输方法、发送装置及接收装置 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 45
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0073—Services, e.g. multimedia, GOS, QOS
- H04J2203/0082—Interaction of SDH with non-ATM protocols
- H04J2203/0085—Support of Ethernet
Definitions
- the present application relates to the field of communications, and in particular, to a data transmission method, a transmitting device, and a receiving device.
- the 802.3 Ethernet-related standards defined by the IEEE Association are widely cited in the industry. However, with the development of technology, the deviation between standard Ethernet interfaces and actual application requirements is also increasing. For example, if 50Gb/s services use 100 gigabits. The Ethernet (gigabit ethernet, GE) port will waste bandwidth resources, and the 200Gb/s service does not have a corresponding Ethernet standard. For this reason, a flexible Ethernet (FelxE) standard is proposed.
- a 100GE physical layer (physical, PHY) interface time slots are divided according to time division multiplexing, and one cycle includes 20 time slots. Each time slot carries a 64B/66B code block, and each time slot has a bandwidth of 5 Gbps.
- the scheme requires that one idle code block must be replaced with an indicator code block for indicating all the replaced code blocks in the period in one cycle, but if the indicator code block has an error during transmission, the receiving device receives the data.
- the code block after the replacement in the period cannot be identified. It can be seen that the replacement mode of the idle code block has a high dependence on the indicator code block, and the transmission error of the indication code block will affect the other transmissions of the receiving device to the same period.
- the identification and extraction of the replaced code blocks, the overall stability of the network transmission is poor.
- the embodiment of the present application provides a data transmission method for improving overall stability of network transmission.
- the first aspect of the embodiments of the present application provides a data transmission method, including:
- the transmitting device acquires a code block set
- the transmitting device determines whether an idle code block is included in the code block set
- the sending device If yes, the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, the data domain is used to carry a service, and the indication domain carries indication information, where the indication information is used to indicate the The dedicated code block and the data domain carry the service;
- the transmitting device transmits the target code block set.
- the processing of the code block set by the transmitting apparatus may be implemented in the PHY layer.
- the code block set in the embodiment of the present application may be a continuous code block on the communication interface, or may be a FlexE frame applied in FlexE.
- the dedicated code block in the embodiment of the present application is different from the OH code block set and other data code blocks in the FlexE frame, and the indication field of the dedicated code block can uniquely distinguish the dedicated code block and indicate that the data field of the dedicated code block carries the service.
- the service includes a BE service or an OH service.
- the service is the BE service
- the generating, by the sending device, the dedicated code block includes:
- the transmitting device determines 0 to 7 bit bits and/or 32 to 35 bits of the dedicated code block as the indication field;
- the transmitting device determines that 8 to 31 bits and/or 36 to 63 bits of the dedicated code block are the data fields
- the transmitting device encapsulates the BE service into the data domain.
- the service is the OH service
- the generating, by the sending device, the dedicated code block includes:
- the transmitting device determines 0 to 7 bit bits and/or 32 to 35 bits of the dedicated code block as the indication field;
- the transmitting device determines that 8 to 31 bits and/or 36 to 63 bits of the dedicated code block are the data fields
- the transmitting device encapsulates the OH service into the data domain.
- the OH service encapsulated in the dedicated code block is a part of the OH service in the OH service that the sending device determines to carry.
- the method before the sending device generates the dedicated code block, the method further includes:
- the transmitting device determines the service that needs to be added to the dedicated code block.
- the sending device uses the dedicated code block Before replacing the idle code block to obtain a target code block set, the method further includes:
- the transmitting device encapsulates the OH service into a management channel, and the code block set includes the management channel.
- the management channel is reserved for carrying the management information, and the OH service encapsulated in the management channel is another part of the OH service except the OH service encapsulated in the dedicated code block. .
- the sending device acquires a code block set.
- the code block set includes an idle code block
- the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, and the data domain is used to carry the service.
- indicating the bearer indication information where the indication information is used to indicate that the dedicated code block and the data domain carry the service
- further sending by using the dedicated code block, replace the idle code block to obtain a target code block set and send
- each dedicated code block in the code block set in this embodiment not only has an identification function but also carries data information, even if a dedicated code block in which a transmission error occurs in the code block set does not affect.
- the receiving device identifies and extracts other normal transmitted dedicated code blocks, thereby improving the overall stability of the network transmission.
- a second aspect of the embodiments of the present application provides a data transmission method, including:
- the receiving device determines whether the code block set includes a dedicated code block, the dedicated code block includes an indication domain and a data domain, the data domain is used for carrying a service, and the indication domain bears indication information, and the indication information Used to indicate that the dedicated code block and the data domain bear the service;
- the receiving device extracts the service
- the receiving device replaces the dedicated code block with an idle code block to obtain a target code block set.
- the processing of the code block set by the receiving apparatus may be implemented in the PHY layer.
- the receiving device may receive a set of code blocks sent by another sending device, which may be a continuous code block on the communication interface, or may be a FlexE frame applied in the FlexE, and the receiving device replaces the dedicated code block with the idle code block. After obtaining the target code block set, the receiving device transmits the target code block set through the communication interface.
- the receiving device can distinguish the dedicated code block by the indication field in the code block and the indication information in the indication field.
- the service includes a BE service or an OH service.
- the service is the BE service
- the receiving device extracting the service includes:
- the receiving device determines that 8 to 31 bits and/or 36 to 63 bits of the dedicated code block are the data fields
- the receiving device extracts the BE service from the data domain.
- the service is the OH service
- the receiving device extracting the service includes:
- the receiving device determines that 8 to 31 bits and/or 36 to 63 bits of the dedicated code block are the data fields
- the receiving device extracts the OH service from the data domain.
- the receiving device in addition to extracting the OH service from the data domain of the dedicated code block, may also extract another part of the OH service from the management channel.
- the receiving device receives the code block set sent by the sending device, and then the receiving device determines whether the code block set includes a dedicated code block, where the dedicated code block includes an indication domain and a data domain, where the data domain is used.
- the bearer service, the indication domain bears indication information, where the indication information is used to indicate that the dedicated code block and the data domain carry the service, and when the code block set includes a dedicated code block, the receiving device extracts the service. And replacing the dedicated code block with the idle code block to obtain the target code block set.
- the dedicated code block in the code block set in this embodiment not only has the identification function but also carries the data information, and for the receiving device, even the code block
- the special code block in which the transmission error occurs in the set does not affect the identification and service extraction of other normal transmission dedicated code blocks, and improves the overall stability of the network transmission.
- a third aspect of the embodiments of the present application provides a sending apparatus, including:
- An obtaining unit configured to acquire a code block set
- a determining unit configured to determine whether an idle code block is included in the code block set
- a generating unit configured to generate a dedicated code block when the code block set includes an idle code block, where the dedicated code block includes an indication domain and a data domain, where the data domain is used for carrying a service, and the indication domain bearer indication Information, the indication information is used to indicate that the dedicated code block and the data domain bear the service;
- a replacing unit configured to replace the idle code block with the dedicated code block to obtain a target code block set
- a sending unit configured to send the target code block set.
- the services include best effort BE services or overhead OH services.
- the service is a BE service
- the service is an OH service
- the sending device further includes:
- a determining unit for determining the service that needs to be added to the dedicated code block a determining unit for determining the service that needs to be added to the dedicated code block.
- the sending device further includes:
- the encapsulating unit is configured to encapsulate the OH service into the management channel, where the OH service in the management channel removes another part of the OH service except the OH service encapsulated in the dedicated code block for the OH service to be added.
- a fourth aspect of the embodiments of the present application provides a receiving apparatus, including:
- a receiving unit configured to receive a code block set sent by the sending device
- a determining unit configured to determine whether the code block set includes a dedicated code block, where the dedicated code block includes an indication domain and a data domain, the data domain is used for carrying a service, and the indication domain carries indication information, where the indication The information is used to indicate that the dedicated code block and the data domain bear the service;
- An extracting unit configured to extract the service when the code block set includes a dedicated code block
- a replacement unit configured to replace the dedicated code block to obtain a target code block set.
- the service includes a best effort BE service or an overhead OH service.
- the service is the BE service
- the extracting unit is specifically used for
- the service is the OH service
- the extracting unit is specifically used for
- a fifth aspect of the embodiments of the present application provides a sending apparatus, including:
- a processor a memory, a bus, and an input and output interface
- Program code is stored in the memory
- the processor performs the following operations when calling the program code in the memory:
- the dedicated code block includes an indication domain and a data domain, the data domain is used for carrying a service, the indication domain carries indication information, and the indication information is used to indicate the dedicated code block and The data domain carries the service;
- a sixth aspect of the embodiments of the present application provides a receiving apparatus, including:
- a processor a memory, a bus, and an input and output interface
- Program code is stored in the memory
- the processor performs the following operations when calling the program code in the memory:
- the code block includes a dedicated code block
- the dedicated code block includes an indication domain and a data domain
- the data domain is used to carry a service
- the indication domain carries indication information, where the indication information is used to indicate Dedicating the code block and the data domain carrying the service
- the dedicated code block is replaced with an idle code block to obtain a target code block set.
- a seventh aspect of the present application provides a computer readable storage medium comprising instructions for causing a computer to execute the flow in the data transmission method of the first aspect or the second aspect when the instruction is run on a computer.
- An eighth aspect of the embodiments of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to execute the flow in the data transmission method of the first aspect or the second aspect.
- the embodiments of the present application have the following advantages:
- the sending device acquires a code block set.
- the code block set includes an idle code block
- the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, and the data domain is used to carry the service.
- indicating the bearer indication information where the indication information is used to indicate that the dedicated code block and the data domain carry the service
- further sending by using the dedicated code block, replace the idle code block to obtain a target code block set and send
- each dedicated code block in the code block set in this embodiment not only has an identification function but also carries data information, even if a dedicated code block in which a transmission error occurs in the code block set does not affect.
- the receiving device identifies and extracts other normal transmitted dedicated code blocks, thereby improving the overall stability of the network transmission.
- Figure 1 is a general architectural diagram of FlexE
- FIG. 2 is a frame format diagram of a FlexE frame
- FIG. 3 is a code block format diagram of a dedicated indicator code block in the prior art
- FIG. 4 is a schematic diagram of an embodiment of a data transmission method according to the present application.
- FIG. 5 is a schematic diagram of another embodiment of a data transmission method according to the present application.
- FIG. 6 is a code block format diagram of a dedicated code block in the present application.
- FIG. 7 is a frame format diagram of a PPP frame
- FIG. 8 is a schematic diagram of another embodiment of a data transmission method according to the present application.
- FIG. 9 is a schematic diagram of a dedicated code block and a management channel jointly carrying an OH service according to the present application.
- FIG. 10 is a schematic diagram of another embodiment of a data transmission method according to the present application.
- FIG. 11 is a schematic diagram of an embodiment of a transmitting apparatus of the present application.
- FIG. 12 is a schematic diagram of an embodiment of a receiving apparatus of the present application.
- FIG. 13 is a schematic diagram of an embodiment of a network device according to the present application.
- the embodiment of the present application provides a data transmission method for improving overall stability of network transmission.
- the embodiments of the present application can be applied to FlexE.
- the FlexE supports binding multiple Ethernet interfaces into one link group to support media access control (MAC) services with a rate greater than a single Ethernet interface, and
- the service allocation time slot supports MAC services whose rate is smaller than the link group bandwidth or smaller than the bandwidth of a single Ethernet interface.
- multiple MAC services can be simultaneously transmitted in the link group by allocating time slots for the service.
- the overall architecture of FlexE is shown in Figure 1.
- the flexible Ethernet group (FlexE Group) is bound by 1 to n Ethernet physical layers (PHYs), and the flexible Ethernet clients (FlexE Clients) are MAC-based.
- Ethernet data stream flexible Ethernet layer (FlexE Shim) in the transmission direction to reuse, the FlexE Clients data mapping to FlexE Group, the opposite in the receiving direction to demultiplex, the data from FlexE Group demapping.
- FlexE constructs a fixed frame format for physical interface transmission and divides the time slot based on time division multiplexing.
- the frame format in FlexE is shown in Figure 2.
- the data code block stream is composed of 64B/66B code blocks. Each 20 64B/66B code blocks are in one cycle, and the 20 64B/66B code blocks respectively correspond to different time slots, and the data on each PHY in the FlexE is implemented by periodically inserting overhead (OH) code blocks.
- OH overhead
- Alignment in particular, inserts a 66B OH code block every 1023x20 64B/66B code blocks, and 8 OH code blocks plus 1023x20 64B/66B code blocks together form a FlexE frame, wherein 8 of each FlexE frame A number of OH code blocks are also extracted in the OH code block to define a management channel.
- 64B/66B encoding encodes 64-bit data or control information into 66-bit block transmission.
- the first two bits of the 66-bit block represent the synchronization header, which is mainly used for data alignment and synchronization.
- the synchronization header has "01” and “10", “01 "The following 64 bits are all data, and "10" indicates that the latter 64 bits are a mixture of data and control information.
- Each of the 20 64B/66B code blocks in each period may include an idle code block that does not carry a service.
- the first idle code block in the period is replaced with the indicator code block of 0x4B+0xA, corresponding to the first bit in FIG. 3, and the remaining idle code blocks are replaced by the BE service code block, corresponding to the 10th bit and the 12th bit in FIG.
- the 17th bit indicating that the first 20 bits of the three bytes of the code block D1-D3 are used to indicate the replacement of the code block in the period, corresponding to the case shown in FIG. 3, the first 20 bits of D1-D3 should be (1000 0000 0101 0000 1000), where 1 indicates the code block after replacement in the period, and 0 indicates that the code block in the period is the original code block (not replaced).
- the solution can only work in a scenario that includes at least two idle code blocks in the same period, and indicates that the transmission error of the code block will affect the identification and extraction of the replaced code blocks that are normally replaced by the receiving device in the same period.
- the overall stability of the transmission is poor.
- the data transmission method described in the embodiment of the present application may be applied to a network device, such as a switch, a router, etc., and it may be understood that the device for implementing the data transmission method in the embodiment of the present application is a device for transmitting and receiving. Both the data transmission function and the data reception function can be regarded as a transmitting device when transmitting data, and can be regarded as a receiving device when receiving data.
- an embodiment of a data transmission method in an embodiment of the present application includes:
- the sending device acquires a code block set.
- the sending device receives the code block set through the communication interface.
- the code block set may be a continuous code block on the communication interface, or may be a FlexE frame.
- the FlexE frame is configured by the frame structure.
- a column of the illustrated OH code block is constructed in conjunction with the remaining data code blocks, wherein one or more OH code blocks in the OH code block set are used as management channels reserved for carrying management information, such as OH.
- each OH code block uses "01" as the synchronization header and contains 8 available bytes for a total of 64 bits.
- the transmitting device determines whether an idle code block is included in the code block set. If yes, step 403 is performed.
- the sending device After receiving the code block set, the sending device needs to determine whether the code block includes the idle code block. It can be understood that the idle code block is a code block that does not carry the data information.
- the transmitting device generates a dedicated code block.
- the sending device when the code block set includes an idle code block, the sending device generates a dedicated code block.
- the dedicated code block includes a synchronization header, an indication field, and a data field, and removes the synchronization header of the first 2 bits occupying the dedicated code block.
- the indication field and the data field occupy 64 bits behind the dedicated code block, and the data field is used to carry the service, and the indication domain carries the indication information, where the indication information is used to indicate the dedicated code block and indicates that the data field of the dedicated code block carries the service.
- the dedicated code block in the embodiment of the present application is different from the OH code block set and other data code blocks in the FlexE frame, and the indication field of the dedicated code block can uniquely distinguish the dedicated code block and indicate that the data field of the dedicated code block carries the service.
- the receiving device can identify the dedicated code block as a code block that replaces the idle code block and carries the service according to the indication field of the dedicated code block.
- the transmitting device replaces the idle code block with a dedicated code block to obtain a target code block set.
- the transmitting device replaces the idle code block with the dedicated code block to obtain the target code block set. It can be understood that if the code block set includes multiple idle code blocks, the sending is performed. The device sequentially replaces the idle code block according to the order in which the code blocks in the code block set are transmitted.
- the transmitting device sends the target code block set.
- the transmitting device completes the replacement of the idle code block by the dedicated code block
- the obtained target code block set is sent out from the interface.
- the sending device acquires a code block set.
- the code block set includes an idle code block
- the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, and the data domain is used to carry the service.
- the indication field indicates the domain bearer indication information, where the indication information is used to indicate that the dedicated code block and the data domain bear the service, and the sending device replaces the idle code block with the dedicated code block to obtain the target code block set.
- each dedicated code block in the code block set in this embodiment not only has an identification function but also carries data information, even if a special code block with a transmission error occurs in the code block set. It will affect the identification and extraction of other normal transmission specific code blocks by the receiving device, and improve the overall stability of the network transmission.
- Solution 1 A special code block is defined, the dedicated code block includes an indication field and a data field, the indication field is used to indicate a dedicated code block, the data field is used to carry a BE service, and the sending device uses the dedicated code carrying the BE service.
- the block replaces the idle code block.
- an embodiment of a data transmission method in an embodiment of the present application includes:
- the sending device acquires a code block set.
- the sending device receives the code block set through the communication interface.
- the code block set may be a continuous code block on the communication interface, or may be a FlexE frame.
- the FlexE frame is configured by the frame structure.
- a column of the illustrated OH code block is constructed in conjunction with the remaining data code blocks, wherein one or more OH code blocks in the OH code block set are used as management channels reserved for carrying management information, such as OH.
- each OH code block uses "01" as the synchronization header and contains 8 available bytes for a total of 64 bits.
- the transmitting device determines whether an idle code block is included in the code block set. If yes, step 503 is performed.
- the sending device After receiving the code block set, the sending device needs to determine whether the code block set of the code block set includes an idle code block. It can be understood that the idle code block is a code block that does not carry data information.
- the sending apparatus determines a data domain and an indication domain of the dedicated code block.
- the sending device determines the data field and the indication field of the dedicated code block.
- the dedicated code block may be as shown in FIG. 6, and the dedicated code block includes the synchronization header.
- the indication field and the data field are removed from the synchronization header occupying the first 2 bits of the dedicated code block, and the indication field and the data field occupy 64 bits behind the dedicated code block.
- the indication field may have multiple definition manners, for example, the dedicated code block is 0.
- Up to 7bit is defined as an indication field
- 32 to 35 bits of the dedicated code block may be defined as an indication field, or 0 to 7 bits and 32 to 35 bits of the dedicated code block may be jointly defined as an indication domain, that is, 0x4B in the figure 6
- the indicated area or the area indicated by 0xF, or the area indicated by 0x4B+0xF, the data field of the dedicated code block can also be defined in various ways, for example, 8 to 31 bits of the dedicated code block are defined as data fields,
- the 36 to 63 bits of the dedicated code block may be defined as a data field, or 8 to 31 bits and 36 to 63 bits of the dedicated code block may be jointly defined as a data field, that is, an area indicated by D1 - D3 in FIG. 6 or D4 -D7 shows the area, or D1-D7 Area.
- the dedicated code block in the embodiment of the present application is different from the OH code block set and other data code blocks in the FlexE frame, and the indication field of the dedicated code block can uniquely distinguish the dedicated code block and indicate that the data field of the dedicated code block carries the service.
- the receiving device can identify the dedicated code block as a code block that replaces the idle code block and carries the service according to the indication field of the dedicated code block.
- the indication information is carried in the indication field, such as 0x4B and 0xF, where the indication information carried in the indication domain may be other forms, for example, the indication information corresponding to 0 to 7 bits may be 0x4B or 32 to 35 bits.
- the corresponding indication information is 0xF, 0xA, 0x9, or 0x3, or the indication information corresponding to 0 to 7 bits is 0x00, which is not limited herein.
- the sending device loads the BE service into the dedicated code block.
- the sending device loads the BE service to be carried into the data field of the dedicated code block.
- the sending device encapsulates the BE service and performs byte-by-byte mapping through a point-to-point protocol (PPP). Go to the data field of the dedicated code block.
- PPP point-to-point protocol
- the PPP frame format is shown in Figure 7.
- PPP uses 0x7E as the start and end of the frame, followed by the 0x7E start byte is the address byte (0xFF) and the control byte (0x03), and the following protocol field uses two words.
- the section is filled, the information field is used to carry the BE service that needs to be transmitted, and the frame check field (FCS) is also two bytes. It is used for checking the information domain, and borrows the PPP protocol based on the byte delimiting mode.
- the start and end of the frame are identified by 0x7E and the BE service is encapsulated into the information field.
- the transmitting device may use other protocols in addition to encapsulating the BE service by using the PPP protocol, for example, a high-level data link control (HDLC) protocol and a general framing protocol (generic framing). Procedure, GFP) protocol, which is not limited here.
- a high-level data link control (HDLC) protocol and a general framing protocol (generic framing).
- GFP general framing protocol
- the transmitting device replaces the idle code block with a dedicated code block to obtain a target code block set.
- the transmitting device After the sending device loads the BE service into the dedicated code block, the transmitting device replaces the idle code block with the dedicated code block to obtain the target code block set. It can be understood that if the code block set includes multiple idle code blocks, The transmitting device sequentially replaces the idle code block in the order in which the code blocks in the code block set are transmitted.
- the transmitting device sends the target code block set.
- the transmitting device completes the replacement of the idle code block by the dedicated code block
- the obtained target code block set is sent out from the interface.
- the sending device acquires a code block set.
- the code block set includes an idle code block
- the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, and the data domain is used to carry the BE.
- the service indication field indicates the domain bearer indication information, where the indication information is used to indicate that the dedicated code block and the data domain bear the BE service, and the sending device replaces the idle code block with the dedicated code block to obtain the target code.
- the block sets and transmits the target code block set. It can be seen that each dedicated code block in the code block set in this embodiment not only has an identification function but also carries data information, even if a special code block with a transmission error occurs in the code block set. It also does not affect the identification and extraction of other normally transmitted dedicated code blocks by the receiving device, and improves the overall stability of the network transmission.
- Solution 2 A special code block is defined, the dedicated code block includes an indication field and a data field, and the indication field is used to indicate a dedicated code block, and the sending device loads the OH service into the data field and the management channel of the dedicated code block, and uses The dedicated code block replaces the idle code block, so that the dedicated code block and the management channel jointly carry the OH service.
- FIG. 8 another embodiment of a data transmission method in an embodiment of the present application includes:
- the sending device acquires a code block set.
- the transmitting device determines whether an idle code block is included in the code block set. If yes, step 803 is performed.
- the sending apparatus determines a data domain and an indication domain of the dedicated code block.
- the steps 801 to 803 are similar to the steps 501 to 503 in the embodiment shown in FIG. 5, and details are not described herein again.
- the sending device loads the first OH service into the dedicated code block.
- the sending device loads the first OH service to be carried in the data field of the dedicated code block, and the first OH service is a part of the OH service in the OH service that the sending device needs to add.
- the first OH service is encapsulated by a point to point protocol (PPP) and mapped byte by byte into the data field of the dedicated code block.
- PPP point to point protocol
- the PPP frame format is shown in Figure 6.
- PPP uses 0x7E as the start and end of the frame, followed by the 0x7E start byte is the address byte (0xFF) and the control byte (0x03), and the subsequent protocol field uses two words.
- the section is filled, the information field is used to carry the first OH service to be transmitted, and the frame check field (FCS) is also two bytes, which is used for checking the information domain, borrowing the PPP protocol based on byte-based frame delimitation.
- FCS frame check field
- the start and end of the frame are identified by 0x7E and the first OH service is encapsulated into the information field.
- the transmitting device may use other protocols, such as a high-level data link control (HDLC) protocol and a general framing procedure (GFP) protocol is not limited herein.
- HDMI high-level data link control
- GFP general framing procedure
- the sending device loads the second OH service into the management channel.
- the sending device loads the second OH service to be carried in the management channel. It can be understood that the sending device can jointly carry the OH service in combination with the dedicated code block and the management channel, where the second OH service is required. Another part of the OH service except the first OH service is removed from the added OH service.
- the first column of the code block set is an OH code block, where the 4th and 5th OH code blocks are defined as management channels, and the second OH service is loaded into the management channel, and the management channel includes 132bit
- the management channel defined in this embodiment is only an example, and the management channel may have other definition manners.
- the management channel may also be defined by the third to eighth OH code blocks. This is not limited here.
- the sending device encapsulates the second OH service through the PPP protocol and maps it to the management channel byte by byte.
- the sending device may use other protocols, for example, HDLC. Protocol and GFP protocol, which are not limited here.
- step 804 may be performed first, or step 805 may be performed first, or step 804 and step 805 may be performed at the same time, which is not limited herein.
- the transmitting device replaces the idle code block with a dedicated code block to obtain a target code block set.
- the sending device sends the target code block set.
- the steps 806 to 807 are similar to the steps 505 to 506 in the embodiment shown in FIG. 5, and details are not described herein again.
- the sending device acquires a code block set.
- the code block set includes an idle code block
- the sending device generates a dedicated code block, where the dedicated code block includes an indication domain and a data domain, and the data domain is used to carry the first An OH service, indicating domain bearer indication information, where the indication information is used to indicate that the dedicated code block and the data domain bear the service, and the sending device further loads the second OH service into the management channel. That is to say, the OH service is carried by the dedicated code block and the management channel.
- a part of the OH service can be carried by the dedicated code block to provide additional bandwidth for the OH service.
- another embodiment of a data transmission method in an embodiment of the present application includes:
- the receiving device receives a code block set.
- the receiving device receives the code block set sent by the other device.
- the code block set may be a continuous code block on the communication interface, or may be a FlexE frame, and the description and diagram of the FlexE frame. Step 4 of the embodiment shown in FIG. 4 is similar to the description of the FlexE frame, and details are not described herein again.
- the receiving device determines whether a dedicated code block is included in the code block set. If yes, step 1003 is performed.
- the receiving device After receiving the code block set, the receiving device needs to determine whether the code block set includes a dedicated code block.
- the description of the code block is similar to the step 503 in the embodiment shown in FIG. 5, and details are not described herein again.
- the receiving device can identify the dedicated code block according to the indication field in the dedicated code block and the indication information in the indication domain.
- the receiving device sequentially replaces the dedicated code blocks according to the order of transmission of the code blocks in the code block set.
- the receiving device extracts a service.
- the receiving device when the code block set includes the dedicated code block, the receiving device extracts the corresponding service from the dedicated code block. Specifically, if the dedicated code block carries the BE service, the receiving device uses the dedicated service. The BE service is extracted from the data field of the code block. If the dedicated code block carries a part of the OH service, the receiving device extracts the OH service from the data field of the dedicated code block, and further needs to extract another part from the management channel. OH business.
- the receiving device replaces the dedicated code block with an idle code block to obtain a target code block set.
- the receiving device after the receiving device extracts the service from the dedicated code block, the receiving device replaces the dedicated code block with the idle code block to obtain the target code block set, that is, restores the dedicated code block to the previous idle code block, and then The receiving device sends the target code block set through the communication interface.
- the receiving device receives the code block set sent by the sending device, and then the receiving device determines whether the code block set includes a dedicated code block, where the dedicated code block includes an indication domain and a data domain, where the data domain is used.
- the bearer service, the indication domain bears indication information, where the indication information is used to indicate that the dedicated code block and the data domain carry the service, and when the code block set includes a dedicated code block, the receiving device extracts the service. And replacing the dedicated code block with the idle code block to obtain the target code block set.
- the dedicated code block in the code block set in this embodiment not only has the identification function but also carries the data information, and for the receiving device, even the code block
- the special code block in which the transmission error occurs in the set does not affect the identification and service extraction of other normal transmission dedicated code blocks, and improves the overall stability of the network transmission.
- an embodiment of a sending apparatus in this embodiment of the present application includes:
- the obtaining unit 1101 is configured to acquire a code block set.
- the determining unit 1102 is configured to determine whether an idle code block is included in the code block set.
- the generating unit 1103 is configured to generate, when the code block set includes an idle code block, a dedicated code block, where the dedicated code block includes an indication domain and a data domain, where the data domain is used for carrying a service, and the indication domain bearer Instructing information, the indication information is used to indicate that the dedicated code block and the data domain bear the service;
- the replacing unit 1104 is configured to replace the idle code block with the dedicated code block to obtain a target code block set.
- the sending unit 1105 is configured to send the target code block set.
- the sending apparatus further includes:
- a determining unit 1106 is configured to determine the service that needs to be added to the dedicated code block.
- the generating unit 1103 is specifically used to generate the service to be added.
- the BE service is encapsulated into the data domain.
- the generating unit 1103 is specifically used to generate the service to be added.
- the acquiring unit 1101 obtains a code block set, and the determining unit 1102 determines whether an idle code block is included in the code block set.
- the code block set includes an idle code block
- the generating unit 1103 generates a dedicated code block, and the special code is generated.
- the block includes an indication field and a data field, and the data field is used to carry the service, indicating the domain bearer indication information, where the indication information is used to indicate that the dedicated code block and the data domain bear the service, and the further replacing unit 1104 is used.
- the dedicated code block replaces the idle code block to obtain the target code block set, and the transmitting unit 1105 sends the target code block set.
- each dedicated code block in the code block set in this embodiment not only has the identification function but also Carrying data information, even if a special code block with a transmission error in the code block set does not affect the recognition and extraction of other normally transmitted dedicated code blocks by the receiving device, and the overall stability of the network transmission is improved.
- the transmitting device in the embodiment of the present application has been described above.
- the receiving device in the embodiment of the present application is described below:
- an embodiment of a receiving apparatus in this embodiment of the present application includes:
- the receiving unit 1201 is configured to receive a code block set sent by the sending device.
- the determining unit 1202 is configured to determine whether the dedicated code block is included in the code block set, where the dedicated code block includes an indication domain and a data domain, the data domain is used to carry a service, and the indication domain carries indication information, where The indication information is used to indicate that the dedicated code block and the data domain bear the service;
- the extracting unit 1203 is configured to: when the dedicated code block is included in the code block set, extract the service;
- the replacing unit 1204 is configured to replace the dedicated code block to obtain a target code block set.
- the extracting unit 1203 is specifically used to extract the service to be extracted.
- the extracting unit 1203 is specifically used to extract the service to be extracted.
- the receiving unit 1201 receives the code block set sent by the sending device, and the determining unit 1202 determines whether the dedicated code block is included in the code block set, where the dedicated code block includes an indication domain and a data domain, where the data domain is used.
- the indication domain carries indication information, where the indication information is used to indicate that the dedicated code block and the data domain carry the service, and when the code block set includes a dedicated code block, the extracting unit 1203
- the replacement unit 1204 replaces the dedicated code block with the idle code block to obtain the target code block set.
- the dedicated code block in the code block set in this embodiment not only has the identification function but also carries the data information, and the receiving device is It is said that even if a special code block with a transmission error in the code block set does not affect the identification and service extraction of other normal transmission dedicated code blocks, the overall stability of the network transmission is improved.
- the transmitting device and the receiving device in the embodiment of the present application are described above from the perspective of a modular functional entity.
- the following describes the network device having the sending and receiving functions in the embodiment of the present application from the perspective of hardware processing:
- the network device may be a provider (P) network node in the FlexE, or may be a provider edge (PE) network node, and the network device may be regarded as the embodiment in the present application when performing data transmission.
- P provider
- PE provider edge
- the transmitting device, the network device can be regarded as the receiving device in the embodiment of the present application when performing data reception.
- the network device in the present application includes one or more central processing unit 1301, a memory 1302, and a communication interface 1303.
- the central processing unit 1301, the memory 1302, and the communication interface 1303 are mutually connected by a bus.
- the memory 1302 may be short-term storage or persistent storage for storing related instructions and data, and the communication interface 1303 is for receiving and transmitting data. Still further, central processor 1301 can be configured to communicate with memory 1302 to perform a series of instruction operations in memory 1302 on the network device.
- the central processing unit 1301 reads the program code stored in the memory 1302 and performs the following operations:
- the dedicated code block includes an indication domain and a data domain, the data domain is used for carrying a service, the indication domain carries indication information, and the indication information is used to indicate the special code
- the dedicated code block includes an indication domain and a data domain, the data domain is used for carrying a service, the indication domain carries indication information, and the indication information is used to indicate the special code
- the block and the data domain bear the service;
- the target code block set is transmitted through the communication interface 1303.
- the central processing unit 1301 reads the program code stored in the memory 1302 and performs the following operations:
- the code block includes a dedicated code block
- the dedicated code block includes an indication domain and a data domain
- the data domain is used to carry a service
- the indication domain carries indication information, where the indication information is used to indicate Dedicating the code block and the data domain carrying the service
- the dedicated code block is replaced with an idle code block to obtain a target code block set.
- the specific function module in the central processing unit 1301 can be divided into functional modules of the acquiring unit, the determining unit, the generating unit, the replacing unit, the sending unit, the extracting unit, and the like described in the foregoing FIGS. 11 and 12. Similar, it will not be repeated here.
- the disclosed system, apparatus, and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .
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Abstract
Description
Claims (18)
- 一种数据传输方法,其特征在于,包括:发送装置获取码块集合;所述发送装置判断所述码块集合中是否包括空闲码块;若是,则所述发送装置生成专用码块,所述专用码块包括指示域和数据域,所述数据域用于承载业务,所述指示域承载指示信息,所述指示信息用于指示所述专用码块及所述数据域中承载有所述业务;所述发送装置用所述专用码块替换所述空闲码块得到目标码块集合;所述发送装置发送所述目标码块集合。
- 根据权利要求1所述的方法,其特征在于,所述业务包括尽力而为BE业务或开销OH业务。
- 根据权利要求2所述的方法,其特征在于,所述业务为所述BE业务;所述发送装置生成所述专用码块包括:所述发送装置确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域;所述发送装置确定所述专用码块的8至31bit和/或36至63bit为所述数据域;所述发送装置将所述BE业务封装到所述数据域。
- 根据权利要求2所述的方法,其特征在于,所述业务为所述OH业务;所述发送装置生成所述专用码块包括:所述发送装置确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域;所述发送装置确定所述专用码块的8至31bit和/或36至63bit为所述数据域;所述发送装置将所述OH业务封装到所述数据域。
- 根据权利要求1至4中任一项所述的方法,其特征在于,所述发送装置生成专用码块之前,所述方法还包括:所述发送装置确定需要添加到所述专用码块的所述业务。
- 一种数据传输方法,其特征在于,包括:接收装置接收发送装置发送的码块集合;所述接收装置判断所述码块集合中是否包括专用码块,所述专用码块包括指示域和数据域,所述数据域用于承载业务,所述指示域承载指示信息,所述指示信息用于指示所述专用码块及所述数据域中承载有所述业务;若是,则所述接收装置提取所述业务;所述接收装置用空闲码块替换所述专用码块得到目标码块集合。
- 根据权利要求6所述的方法,其特征在于,所述业务包括尽力而为BE业务或开销OH业务。
- 根据权利要求7所述的方法,其特征在于,所述业务为所述BE业务;所述接收装置提取所述业务包括:所述接收装置确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域;所述接收装置确定所述专用码块的8至31bit和/或36至63bit为所述数据域;所述接收装置从所述数据域提取所述BE业务。
- 根据权利要求7所述的方法,其特征在于,所述业务为所述OH业务;所述接收装置提取所述业务包括:所述接收装置确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域;所述接收装置确定所述专用码块的8至31bit和/或36至63bit为所述数据域;所述接收装置从所述数据域提取所述OH业务。
- 一种发送装置,其特征在于,包括:获取单元,用于获取码块集合;判断单元,用于判断所述码块集合中是否包括空闲码块;生成单元,用于当所述码块集合中包括空闲码块时,生成专用码块,所述专用码块包括指示域和数据域,所述数据域用于承载业务,所述指示域承载指示信息,所述指示信息用于指示所述专用码块及所述数据域中承载有所述业务;替换单元,用于用所述专用码块替换所述空闲码块得到目标码块集合;发送单元,用于发送所述目标码块集合。
- 根据权利要求10所述的发送装置,其特征在于,所述业务包括尽力而为BE业务或开销OH业务。
- 根据权利要求11所述的发送装置,其特征在于,所述业务为BE业务;所述生成单元具体用于确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域,并确定所述专用码块的8至31bit和/或36至63bit为所述数据域;将所述BE业务封装到所述数据域。
- 根据权利要求11所述的发送装置,其特征在于,所述业务为OH业务;所述生成单元具体用于确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域,并确定所述专用码块的8至31bit和/或36至63bit为所述数据域;将所述OH业务封装到所述数据域。
- 根据权利要求10至13中任一项所述的发送装置,其特征在于,所述发送装置还包括:确定单元,用于确定需要添加到所述专用码块的所述业务。
- 一种接收装置,其特征在于,包括:接收单元,用于接收发送装置发送的码块集合;判断单元,用于判断所述码块集合中是否包括专用码块,所述专用码块包括指示域和数据域,所述数据域用于承载业务,所述指示域承载指示信息,所述指示信息用于指示所述专用码块及所述数据域中承载有所述业务;提取单元,用于当所述码块集合中包括专用码块时,提取所述业务;替换单元,用于替换所述专用码块得到目标码块集合。
- 根据权利要求15所述的接收装置,其特征在于,所述业务包括尽力而为BE业务 或开销OH业务。
- 根据权利要求16所述的接收装置,其特征在于,所述业务为所述BE业务;所述提取单元具体用于确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域,并确定所述专用码块的8至31bit和/或36至63bit为所述数据域;从所述数据域提取所述BE业务。
- 根据权利要求16所述的接收装置,其特征在于,所述业务为所述OH业务;所述提取单元具体用于确定所述专用码块的0至7比特位bit和/或32至35bit为所述指示域,并确定所述专用码块的8至31bit和/或36至63bit为所述数据域;从所述数据域提取所述OH业务。
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CN109962762A (zh) | 2019-07-02 |
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