CN111245577B - Data transmission method, system and related equipment - Google Patents
Data transmission method, system and related equipment Download PDFInfo
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- CN111245577B CN111245577B CN201811440979.9A CN201811440979A CN111245577B CN 111245577 B CN111245577 B CN 111245577B CN 201811440979 A CN201811440979 A CN 201811440979A CN 111245577 B CN111245577 B CN 111245577B
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0893—Assignment of logical groups to network elements
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Abstract
The invention discloses a data transmission method, a data transmission system and related equipment, and relates to the technical field of communication. The data transmission method comprises the following steps: the sending equipment carries out fragmentation processing on the management information to obtain one or more management information fragments; the sending equipment acquires a standard Ethernet message, wherein the standard Ethernet message comprises one or more frame interval IFG data; the sending equipment replaces IFG data in a standard Ethernet message with one or more management information fragments to generate a processed Ethernet message, wherein each management information fragment replaces one IFG data; and the sending equipment sends the processed Ethernet message to receiving equipment of the communication opposite end so that the receiving equipment can acquire management information from the processed Ethernet message. The embodiment of the invention provides a management information channel establishing scheme with low modification cost on the premise of not influencing the transmission quality of the data message, saves the deployment cost and reduces the deployment difficulty.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a data transmission system, and a related device.
Background
Mobile communication is gradually entering the 5G era. As the base stations of 5G are more densely located, more small base stations are required for coverage of the 5G signal. In the traditional wireless forward transmission scheme, for example, the technologies such as point-to-point optical fiber and the like, under the new construction scene and requirement, the problems of high deployment cost, complex network topology, high engineering construction difficulty and the like exist, and the new forward transmission scheme needs to be adopted to meet the service bearing requirement under the 5G scene.
A WDM PON (Wavelength Division Multiplexing-Passive Optical Network) adopts a Wavelength Division Multiplexing technology, and a PON port of each local-side equipment OLT (Optical Line Terminal) and each user-side Terminal ONU (Optical Network Unit) are in a point-to-point correspondence relationship, and monopolizes a pair of uplink and downlink wavelengths. Each transmission channel is independent and does not interfere, and the time delay and jitter of data transmission are effectively optimized due to the fact that a time division multiplexing scheme of a traditional optical access network is not adopted, and the performance requirement of 5G forward transmission can be met in technical performance.
The WDM PON system is adopted to carry the 5G forward transmission, so that the problems of the existing 5G forward transmission solution can be effectively solved, and the method has the advantages of saving trunk optical fiber resources, low deployment and management difficulty and the like.
Disclosure of Invention
After analysis, the inventor finds that in the WDM PON system for 5G forwarding, the high bandwidth requirement and the delay sensitivity of the 5G forwarding signal impose many limitations on the selection of the management information channel scheme of the WDM PON system. The current mainstream technical solution is as follows.
The radio frequency pilot-based solution provided by AMCC (Applied Micro Circuits Corporation) may degrade the quality of the data message to some extent, and at the same time, an additional low-frequency signal processing circuit and chip need to be introduced, thereby causing additional problems of volume and power consumption.
A transcoding scheme based on a Forward Error Correction (FEC) frame format is a scheme for inserting management information using FEC frames. However, this solution requires the development of a new MAC (Media Access Control) layer chip, and the development cost and the chip power consumption volume have certain problems.
The independent third wavelength scheme separately carries the management channel information by introducing an independent third wavelength. The scheme needs to modify ODN (Optical Distribution Network), and the compatibility has a great problem; meanwhile, an additional pair of transceiver modules needs to be introduced, and the transformation difficulty and cost are unacceptable.
Therefore, the establishment scheme of the management information channel in the related art has the problem of higher modification cost.
The embodiment of the invention aims to solve the technical problem that: the management information channel establishing scheme with low modification cost is provided.
According to a first aspect of some embodiments of the present invention, there is provided a data transmission method, including: the sending equipment carries out fragmentation processing on the management information to obtain one or more management information fragments; the sending equipment acquires a standard Ethernet message, wherein the standard Ethernet message comprises one or more frame interval IFG data; the sending equipment replaces IFG data in a standard Ethernet message with one or more management information fragments to generate a processed Ethernet message, wherein each management information fragment replaces one IFG data; and the sending equipment sends the processed Ethernet message to receiving equipment of the communication opposite end so that the receiving equipment can acquire management information from the processed Ethernet message.
In some embodiments, the transmitting device and the receiving device are located in a wavelength division multiplexing type passive optical network WDM PON system for 5G fronthaul; the sending device is an optical line terminal OLT, the receiving device is an optical network unit ONU, or the sending device is the ONU and the receiving device is the OLT.
In some embodiments, the standard ethernet message includes an eccri data message.
In some embodiments, the sending device performs fragmentation processing on the management information, and obtaining one or more management information fragments includes: the sending equipment divides the management information into a plurality of messages according to the bearing space of each management information fragment; the sending equipment generates corresponding management information fragments according to each message and the fragment serial number; the transmitting device generates a fragment of a length including the management information as a first management information fragment.
In some embodiments, in a case where the data amount of one management information fragment is smaller than the data amount of one IFG data, the data amount in the IFG data replaced by each management information fragment is equal to the data amount of one management information fragment.
In some embodiments, the data transmission method further comprises: the receiving equipment acquires management information from the processed Ethernet message; the receiving equipment replaces management information distribution in the processed Ethernet message with one or more IFG data to generate a standard Ethernet message, wherein each IFG data replaces one management information fragment; and the receiving equipment sends the generated standard Ethernet message to the next network node of the receiving equipment.
In some embodiments, the data transmission method further comprises: in response to the loss or error of at least one management information fragment in the obtained processed Ethernet message, the receiving equipment generates a retransmission request; the receiving equipment carries out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; the method comprises the steps that a receiving device obtains a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data; the receiving equipment replaces IFG data in a standard Ethernet message to be sent to the sending equipment by adopting one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data; the receiving device sends the processed Ethernet message to be sent to the sending device, so that the sending device can obtain a retransmission request from the received processed Ethernet message and retransmit the management information.
According to a second aspect of some embodiments of the present invention, there is provided a transmitting apparatus comprising: the fragment processing module is configured to perform fragment processing on the management information to obtain one or more management information fragments; the Ethernet message acquisition module is configured to acquire a standard Ethernet message, and the standard Ethernet message comprises one or more frame interval IFG data; the fragment replacement module is configured to replace the IFG data in the standard Ethernet message with one or more management information fragments to generate a processed Ethernet message, wherein each management information fragment replaces one IFG data; and the Ethernet message sending module is configured to send the processed Ethernet message to receiving equipment of the communication opposite end so that the receiving equipment can acquire the management information from the processed Ethernet message.
In some embodiments, the transmitting device and the receiving device are located in a wavelength division multiplexing type passive optical network WDM PON system for 5G fronthaul; the sending device is an optical line terminal OLT, the receiving device is an optical network unit ONU, or the sending device is the ONU and the receiving device is the OLT.
In some embodiments, the standard ethernet message includes an eccri data message.
In some embodiments, the fragment processing module is further configured to divide the management information into a plurality of messages according to the bearer space of each management information fragment; generating corresponding management information fragments according to each message and the fragment sequence number; a fragment including the length of the management information is generated as the first management information fragment.
In some embodiments, in a case where the data amount of one management information fragment is smaller than the data amount of one IFG data, the data amount in the IFG data replaced by each management information fragment is equal to the data amount of one management information fragment.
According to a third aspect of some embodiments of the present invention, there is provided a data transmission system comprising: any one of the foregoing sending devices, and the receiving device, are configured to obtain the management information from the processed ethernet packet.
In some embodiments, the receiving device is further configured to obtain management information from the processed ethernet packet; replacing management information distribution in the processed Ethernet message by one or more IFG data to generate a standard Ethernet message, wherein each IFG data replaces one management information fragment; and sending the generated standard Ethernet message to the next network node of the receiving equipment.
In some embodiments, the receiving device is further configured to generate a retransmission request in response to the obtained loss or error of the at least one management information fragment in the processed ethernet packet; carrying out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; acquiring a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data; replacing IFG data in a standard Ethernet message to be sent to sending equipment by adopting one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data; and sending the processed Ethernet message to be sent to the sending equipment so that the sending equipment can acquire a retransmission request from the received processed Ethernet message and retransmit the management information.
According to a fourth aspect of some embodiments of the present invention, there is provided a data transmission apparatus comprising: a memory; and a processor coupled to the memory, the processor configured to perform any of the foregoing data transfer methods based on instructions stored in the memory.
According to a fifth aspect of some embodiments of the present invention, there is provided a computer readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements any of the data transmission methods described above.
Some embodiments of the above invention have the following advantages or benefits: embodiments of the present invention may redefine and utilize IFGs in standard ethernet protocols to carry management information. Therefore, on the premise of not influencing the transmission quality of the data message, the management information channel establishing scheme with low modification cost is provided, the deployment cost is saved, and the deployment difficulty is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a frame structure diagram of a standard ethernet.
Fig. 2 is a flow diagram of a data transmission method according to some embodiments of the invention.
Fig. 3 is a flowchart illustrating a standard ethernet packet recovery method according to some embodiments of the present invention.
Fig. 4 is a flow diagram illustrating a method for retransmission request transmission according to some embodiments of the present invention.
Fig. 5 is a flow diagram of a fragmentation processing method according to some embodiments of the invention.
Fig. 6 is a schematic view of a WDM PON system for 5G forwarding.
Fig. 7 is a flowchart illustrating a data transmission method according to another embodiment of the invention.
Fig. 8 is a block diagram of a transmitting device according to some embodiments of the invention.
Fig. 9 is a block diagram of a data transmission system according to some embodiments of the invention.
Fig. 10 is a schematic diagram of a data transmission apparatus according to some embodiments of the invention.
Fig. 11 is a schematic structural diagram of a data transmission apparatus according to other embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
After analysis, the inventor finds that, in the standard ethernet protocol, there is a certain amount of Inter Frame Gap (IFG) between two adjacent ethernet packets, as shown in fig. 1. The ethernet device can determine and identify the data packet by using the IFG.
However, in the WDM PON system, since the WDM PON network device does not perform any sensing and processing on the transmitted ethernet packets, it is not necessary to determine the inter-frame distance data between two ethernet packets. Therefore, at the level of the WDM PON system, the inter-frame distance data has no special function.
Thus, the inventors have recognized that the inter-frame spacing in standard Ethernet protocols can be redefined and utilized to carry management information. Therefore, the management information channel is established on the premise of low transformation cost and easy deployment. An embodiment of the data transmission method of the present invention is described below with reference to fig. 2.
Fig. 2 is a flow diagram of a data transmission method according to some embodiments of the invention. As shown in fig. 2, the data transmission method of this embodiment includes steps S202 to S210.
In step S202, the transmitting device performs fragmentation processing on the management information to obtain one or more management information fragments.
The sending device and the receiving device of the opposite communication terminal are devices which do not sense data packets and IFGs in the standard ethernet protocol, and may be WDM PON network devices, for example. The management information is used by the sending device and the receiving device, for example, for function configuration, status alarm, message reporting, and the like between the sending device and the receiving device.
In step S204, the sending device obtains a standard ethernet packet, where the standard ethernet packet includes one or more inter-frame gap IFG data.
In step S206, the sending device replaces IFG data in the standard ethernet packet with one or more management information fragments to generate a processed ethernet packet, where each management information fragment replaces one IFG data.
In step S208, the sending device sends the processed ethernet packet to the receiving device of the correspondent node.
In step S210, the receiving device obtains management information from the processed ethernet packet.
By the method of the above embodiment, the IFG in the standard ethernet protocol can be redefined and utilized to carry management information. Therefore, on the premise of not influencing the transmission quality of the data message, the management information channel establishing scheme with low modification cost is provided, the deployment cost is saved, and the deployment difficulty is reduced.
In some embodiments, the data in the standard ethernet packet also needs to be transmitted by the receiving device to the next network node. At this time, the receiving device may restore the processed ethernet packet. An embodiment of the standard ethernet packet recovery method according to the present invention is described below with reference to fig. 3.
Fig. 3 is a flowchart illustrating a standard ethernet packet recovery method according to some embodiments of the present invention. As shown in fig. 3, the standard ethernet packet recovery method of this embodiment includes steps S302 to S306.
In step S302, the receiving device obtains management information from the processed ethernet packet. For example, the receiving device may extract the management information fragments in the processed ethernet message, and reassemble the management information fragments to obtain the management information.
In step S304, the receiving device replaces the management information fragment in the processed ethernet message with one or more IFG data to generate a standard ethernet message, where each IFG data replaces one management information fragment.
In step S306, the receiving device sends the generated standard ethernet packet to the next network node of the receiving device.
By the method of the embodiment, the network outside the system where the sending device and the receiving device are located does not sense the transmission of the management information, so that the influence on the outside of the system can be reduced to the maximum extent.
In some embodiments, the receiving device may further reassemble and verify the management information fragment. If a transmission error or packet loss or other problems are found in the verification process, the receiving device may send a retransmission request to the sending device. The transmission method of the retransmission request may refer to the transmission method of the management information. An embodiment of a retransmission request transmission method of the present invention is described below with reference to fig. 4.
Fig. 4 is a flow diagram illustrating a method for retransmission request transmission according to some embodiments of the present invention. As shown in fig. 4, the retransmission request transmission method of this embodiment includes steps S402 to S412.
In step S402, in response to the loss or error of at least one piece of management information in the obtained processed ethernet packet, the receiving device generates a retransmission request.
In step S404, the receiving device performs fragmentation processing on the retransmission request to obtain one or more retransmission request fragments.
In step S406, the receiving device obtains a standard ethernet packet to be sent to the sending device, where the standard ethernet packet to be sent to the sending device includes one or more inter-frame gap IFG data.
When the retransmission request is smaller than the amount of data that can be carried by one IFG data, one IFG data may be directly replaced with the retransmission request without performing fragmentation processing on the retransmission request.
In step S408, the receiving device replaces IFG data in the standard ethernet message to be sent to the sending device with one or more retransmission request fragments to generate a processed ethernet message to be sent to the sending device, where each retransmission request fragment replaces one IFG data.
In step S410, the receiving device sends the processed ethernet packet to be sent to the sending device.
In step S412, the sending device obtains a retransmission request from the received processed ethernet packet and retransmits the management information.
By the method of the embodiment, retransmission can be requested when an error occurs in the transmission process of the management information, and the management information channel in the embodiment is also utilized in the retransmission process, so that the deployment cost is saved, and the deployment difficulty is reduced.
In some embodiments, in order to facilitate the receiving device to reassemble the management information fragments into the management information, an identifier may be added to each management information fragment, and a description of the length of the management information may be added. An embodiment of the slicing processing method of the present invention is described below with reference to fig. 5.
Fig. 5 is a flow diagram of a fragmentation processing method according to some embodiments of the invention. As shown in fig. 5, the slicing processing method of this embodiment includes steps S502 to S506.
In step S502, the sending device divides the management information into a plurality of messages according to the bearer space of each management information fragment.
In step S504, the sending device generates a corresponding management information fragment according to each packet and the fragment sequence number.
For example, the minimum frame spacing specified by the existing standards is 96 bits. Thus, some embodiments may redefine the 96 bits for carrying management information. When the reusable inter-frame space size is 96 bits, for example, 16 bits of the reusable inter-frame space size may be used as a fragment sequence number, and the remaining 80 bits may be used as a bearer space of a packet generated by the dividing operation. The maximum size of management information that can be carried by the above embodiments is 10 × 2 16 And 655 kbytes, the use requirement can be met.
In some embodiments, in a case where the data amount of one management information fragment is smaller than the data amount of one IFG data, the data amount in the IFG data replaced by each management information fragment is equal to the data amount of one management information fragment. For example, table 1 shows the original structure of inter-frame spacing and the redefined structure of some embodiments of the present invention. As shown in table 1, when the inter-frame distance is greater than 96 bits, for example, 16 bits of the inter-frame distance may be used as a fragment sequence number, 80 bits may be used as a carrying space of a packet generated by the dividing operation, and the part greater than 96 bits is not modified or replaced.
TABLE 1
In step S506, the transmitting device generates a slice of a length including the management information as the first management information slice.
Therefore, the receiving device can recombine according to the length of the management information in the first management information fragment and the identification of each management information fragment, and the data processing efficiency is improved. In the data transmission process, when part of the management information fragments have errors, the management information fragments needing to be retransmitted can be fed back accurately, and the transmission efficiency is improved.
In some embodiments, the transmitting device and the receiving device are located in a WDM PON system for 5G forwarding. Fig. 6 is a schematic view of a WDM PON system for 5G forwarding. As shown in fig. 6, a Unit CU/DU (Central Unit/Distributed Unit) 61 on the base station side is connected to an OLT62, and the OLT62 is connected to an AWG (Arrayed Waveguide Grating) 63. AWG63 is connected to AWG64 at the opposite end by optical fiber. The ONUs 65 are connected to the AWG64, and each ONU65 is connected to one AAU (Active Antenna Unit) 66 on the Antenna side. The sending device may be the OLT62 and the receiving device may be the ONU65, or the sending device may be the ONU65 and the receiving device may be the OLT62. The following describes an embodiment of the data transmission method according to the present invention, taking the transmitting device as an OLT and the receiving device as an ONU as examples.
Fig. 7 is a flowchart illustrating a data transmission method according to another embodiment of the present invention. As shown in fig. 7, the data transmission method of this embodiment includes steps S702 to S720.
In step S702, the OLT performs fragmentation processing on the WDM PON management information that needs to be sent to the ONU, to obtain one or more management information fragments. For example, the management information may be divided into one or more 80-bit packets, and each packet header carries 16-bit fragment sequence number information, so as to generate the management information fragment. If the message part of the last management information fragment is smaller than 80 bits, for example, 0 may be used for padding in the part without data.
In step S704, the OLT generates a slice including the length of the management information.
In step S706, the OLT takes the segment including the length of the management information as the first management information segment, and adds the management information segment to the transmission queue.
In step S708, the OLT acquires a standard ethernet message, which includes one or more inter-frame gap IFG data.
In some embodiments, the standard ethernet messages include Enhanced Common Radio Interface (eCPRI) data messages. Compared with the forwarding of the conventional 4G network, the forwarding of 5G has higher forwarding rate and more severe delay jitter performance requirements. eCPRI, as a novel forwarding protocol, can achieve a single-channel transmission rate of 25Gbps, and is a mainstream candidate for 5G forwarding. The encapsulation of eCPRI data adopts a standard Ethernet scheme, and transmission equipment does not need to sense eCPRI data message content and can directly adopt a mature Ethernet transmission standard and an equipment solution.
In step S710, the OLT replaces IFG data in the standard ethernet packet with one or more management information fragments in the transmission queue to generate a processed ethernet packet, where each management information fragment replaces one IFG data;
in step S712, the OLT sends the processed ethernet packet to the ONU at the opposite communication end.
In step S714, the ONU extracts the management information fragment from the processed ethernet packet.
In step S716, the ONU reassembles the extracted management information segments to generate management information.
In step S718, the ONU replaces the management information distribution in the processed ethernet packet with one or more IFG data to generate a standard ethernet packet, where each IFG data replaces one management information fragment.
In step S720, the ONU transmits the generated standard ethernet packet to the next network node of the receiving device.
By the method of the embodiment, the problem that management information is difficult to transmit due to the fact that the forwarding signals of the 5G occupy high bandwidth in the 5G forwarding network is solved, and compared with solutions in the related art, modification of MAC sublayer functions is not involved, a MAC chip does not need to be researched and developed again, deployment cost is saved, and deployment difficulty is reduced.
An embodiment of the transmitting device of the present invention is described below with reference to fig. 8.
Fig. 8 is a schematic diagram of a transmitting device according to some embodiments of the present invention. As shown in fig. 8, the transmission apparatus 800 of this embodiment includes: the fragment processing module 8100 is configured to perform fragment processing on the management information to obtain one or more management information fragments; an ethernet packet obtaining module 8200 configured to obtain a standard ethernet packet, where the standard ethernet packet includes one or more inter-frame gap IFG data; a fragment replacement module 8300 configured to replace IFG data in a standard ethernet packet with one or more management information fragments to generate a processed ethernet packet, wherein each management information fragment replaces one IFG data; the ethernet packet sending module 8400 is configured to send the processed ethernet packet to a receiving device of the opposite communication terminal, so that the receiving device obtains the management information from the processed ethernet packet.
In some embodiments, the transmitting device and the receiving device are located in a wavelength division multiplexing type passive optical network WDM PON system for 5G fronthaul; the sending device is an optical line terminal OLT, the receiving device is an optical network unit ONU, or the sending device is an ONU and the receiving device is an OLT.
In some embodiments, the standard ethernet message includes an eccri data message.
In some embodiments, the fragment processing module 8100 is further configured to divide the management information into a plurality of messages according to the bearer space of each management information fragment; generating corresponding management information fragments according to each message and the fragment serial number; a fragment including the length of the management information is generated as the first management information fragment.
In some embodiments, in a case where the data amount of one management information fragment is smaller than the data amount of one IFG data, the data amount in the IFG data replaced by each management information fragment is equal to the data amount of one management information fragment.
An embodiment of the data transmission system of the present invention is described below with reference to fig. 9.
Fig. 9 is a block diagram of a data transmission system according to some embodiments of the invention. As shown in fig. 9, the data transmission system 90 of this embodiment includes: a transmitting device 910 and a receiving device 920. The receiving device 920 is configured to obtain management information from the processed ethernet packet.
In some embodiments, the receiving device 920 is further configured to obtain management information from the processed ethernet packet; replacing management information distribution in the processed Ethernet message by one or more IFG data to generate a standard Ethernet message, wherein each IFG data replaces one management information fragment; and sending the generated standard Ethernet message to the next network node of the receiving equipment.
In some embodiments, the receiving device 920 is further configured to generate a retransmission request in response to the obtained loss or error of at least one management information fragment in the processed ethernet packet; carrying out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; acquiring a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data; replacing IFG data in a standard Ethernet message to be sent to sending equipment by adopting one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data; and sending the processed Ethernet message to be sent to the sending equipment so that the sending equipment can acquire a retransmission request from the received processed Ethernet message and retransmit the management information.
Fig. 10 is a schematic structural diagram of a data transmission apparatus according to some embodiments of the present invention, where the data transmission apparatus may be a sending device or a receiving device. As shown in fig. 10, the data transmission device 100 of this embodiment includes: a memory 1010 and a processor 1020 coupled to the memory 1010, the processor 1020 configured to execute the data transmission method of any of the foregoing embodiments based on instructions stored in the memory 1010.
The memory 1010 may include, for example, a system memory, a fixed non-volatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
Fig. 11 is a schematic structural diagram of a data transmission apparatus according to another embodiment of the present invention, where the data transmission apparatus may be a sending device or a receiving device. As shown in fig. 11, the data transmission device 110 of this embodiment includes: the memory 1110 and the processor 1120 may further include an input/output interface 1130, a network interface 1140, a storage interface 1150, and the like. These interfaces 1130, 1140, 1150 and the memory 1110 and the processor 1120 may be connected by a bus 1160, for example. The input/output interface 1130 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 1140 provides a connection interface for various networking devices. The storage interface 1150 provides a connection interface for external storage devices such as an SD card and a usb disk.
An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, wherein the program is configured to implement any one of the aforementioned data transmission methods when executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (16)
1. A method of data transmission, comprising:
the sending equipment carries out fragmentation processing on the management information to obtain one or more management information fragments;
the method comprises the steps that a sending device obtains a standard Ethernet message, wherein the standard Ethernet message comprises one or more frame interval IFG data;
the sending device replaces the IFG data in the standard Ethernet message with the one or more management information fragments to generate a processed Ethernet message, wherein each management information fragment replaces one IFG data;
the sending equipment sends the processed Ethernet message to receiving equipment of a communication opposite end so that the receiving equipment can obtain management information from the processed Ethernet message;
the sending device receives the ethernet message to be sent to the sending device after being processed by the receiving device, wherein the ethernet message received by the sending device is processed by the receiving device in the following way: generating a retransmission request in response to the loss or error of at least one management information fragment in the obtained processed Ethernet message; carrying out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; acquiring a standard Ethernet message to be sent to sending equipment, wherein the standard Ethernet message to be sent to the sending equipment comprises one or more frame interval IFG data; replacing the IFG data in the standard Ethernet message to be sent to the sending equipment by adopting the one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data;
the sending equipment acquires the retransmission request from the received processed Ethernet message and retransmits the management information.
2. The data transmission method according to claim 1, wherein the transmission apparatus and the reception apparatus are located in a wavelength division multiplexing-type passive optical network (WDM PON) system for 5G fronthaul;
the sending device is an Optical Line Terminal (OLT), and the receiving device is an Optical Network Unit (ONU), or the sending device is the ONU and the receiving device is the OLT.
3. The data transmission method according to claim 1 or 2, wherein the standard ethernet packet comprises an enhanced common public radio interface, eCPRI, packet.
4. The data transmission method according to claim 1, wherein the sending device performs fragmentation processing on the management information, and obtaining one or more management information fragments comprises:
the sending equipment divides the management information into a plurality of messages according to the bearing space of each management information fragment;
the sending equipment generates corresponding management information fragments according to each message and the fragment sequence number;
the transmitting device generates a fragment including the length of the management information as a first management information fragment.
5. The data transmission method according to claim 1, wherein in a case where the data amount of one management information fragment is smaller than the data amount of one IFG data, the data amount in the IFG data replaced by each management information fragment is equal to the data amount of one management information fragment.
6. The data transmission method of claim 1, further comprising:
the receiving equipment acquires management information from the processed Ethernet message;
the receiving equipment replaces management information distribution in the processed Ethernet message with one or more IFG data to generate a standard Ethernet message, wherein each IFG data replaces one management information fragment;
and the receiving equipment sends the generated standard Ethernet message to the next network node of the receiving equipment.
7. The data transmission method of claim 1, further comprising:
in response to the loss or error of at least one management information fragment in the obtained processed Ethernet message, the receiving equipment generates a retransmission request;
the receiving equipment carries out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments;
the method comprises the steps that a receiving device obtains a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data;
the receiving device replaces the IFG data in the standard Ethernet message to be sent to the sending device with the one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending device, wherein each retransmission request fragment replaces one IFG data;
the receiving device sends the processed Ethernet message to be sent to the sending device, so that the sending device can obtain a retransmission request from the received processed Ethernet message and resend the management information.
8. A transmitting device, comprising:
the fragment processing module is configured to perform fragment processing on the management information to obtain one or more management information fragments;
an ethernet message acquisition module configured to acquire a standard ethernet message, where the standard ethernet message includes one or more inter-frame gap IFG data;
the fragment replacement module is configured to replace the IFG data in the standard ethernet packet with the one or more management information fragments to generate a processed ethernet packet, wherein each management information fragment replaces one IFG data;
the Ethernet message sending module is configured to send the processed Ethernet message to receiving equipment of a communication opposite terminal so that the receiving equipment can acquire management information from the processed Ethernet message;
and, the transmitting device is further configured to:
receiving an ethernet message to be sent to a sending device after the ethernet message is processed by the receiving device, wherein the ethernet message received by the sending device is processed by the receiving device in the following manner: generating a retransmission request in response to the loss or the error of at least one management information fragment in the obtained processed Ethernet message; carrying out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; acquiring a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data; replacing the IFG data in the standard Ethernet message to be sent to the sending equipment by adopting the one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data;
and acquiring a retransmission request from the received processed Ethernet message and retransmitting the management information.
9. The transmission apparatus according to claim 8, wherein the transmission apparatus and the reception apparatus are located in a wavelength division multiplexing-type passive optical network (WDM PON) system for 5G fronthaul;
the sending device is an Optical Line Terminal (OLT), and the receiving device is an Optical Network Unit (ONU), or the sending device is the ONU and the receiving device is the OLT.
10. The transmitting device according to claim 8 or 9, wherein the standard ethernet packet comprises an enhanced common public radio interface, eCPRI, packet.
11. The transmission device according to claim 8, wherein the fragment processing module is further configured to divide the management information into a plurality of packets according to a bearer space of each management information fragment; generating corresponding management information fragments according to each message and the fragment serial number; and generating a fragment with the length including the management information as a first management information fragment.
12. The transmission apparatus according to claim 8, wherein in a case where a data amount of one management information fragment is smaller than a data amount of one IFG data, a data amount in the IFG data replaced by each management information fragment is equal to a data amount of one management information fragment.
13. A data transmission system comprising:
the transmission apparatus of any one of claims 8 to 12, and
the receiving equipment is configured to acquire management information from the processed Ethernet message; and generating a retransmission request in response to the loss or error of at least one management information fragment in the obtained processed Ethernet message; carrying out fragmentation processing on the retransmission request to obtain one or more retransmission request fragments; acquiring a standard Ethernet message to be sent to a sending device, wherein the standard Ethernet message to be sent to the sending device comprises one or more frame interval IFG data; replacing the IFG data in the standard Ethernet message to be sent to the sending equipment by adopting the one or more retransmission request fragments to generate a processed Ethernet message to be sent to the sending equipment, wherein each retransmission request fragment replaces one IFG data; and sending the processed Ethernet message to be sent to the sending equipment so that the sending equipment can acquire a retransmission request from the received processed Ethernet message and retransmit the management information.
14. The data transmission system of claim 13, wherein the receiving device is further configured to obtain management information from the processed ethernet packet; replacing management information distribution in the processed Ethernet message by one or more IFG data to generate a standard Ethernet message, wherein each IFG data replaces one management information fragment; and sending the generated standard Ethernet message to the next network node of the receiving equipment.
15. A data transmission apparatus comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the data transfer method of any of claims 1-7 based on instructions stored in the memory.
16. A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, implements the data transmission method of any one of claims 1 to 7.
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| US7505458B2 (en) * | 2001-11-27 | 2009-03-17 | Tellabs San Jose, Inc. | Apparatus and method for a fault-tolerant scalable switch fabric with quality-of-service (QOS) support |
| JP4774391B2 (en) * | 2007-08-24 | 2011-09-14 | 株式会社日立製作所 | Optical transmission system and signal speed converter |
| US20090300692A1 (en) * | 2008-06-02 | 2009-12-03 | Mavlankar Aditya A | Systems and methods for video streaming and display |
| CN104734998B (en) * | 2013-12-20 | 2018-11-06 | 华为技术有限公司 | A kind of network equipment and information transferring method |
| WO2016049964A1 (en) * | 2014-09-29 | 2016-04-07 | 华为技术有限公司 | Communication method, device, and system for wavelength division multiplexing passive optical network |
| WO2016187785A1 (en) * | 2015-05-25 | 2016-12-01 | 华为技术有限公司 | Message transmission method, device and system |
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