CN115297073B - E1 service transmission method and device - Google Patents
E1 service transmission method and device Download PDFInfo
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- CN115297073B CN115297073B CN202210873409.9A CN202210873409A CN115297073B CN 115297073 B CN115297073 B CN 115297073B CN 202210873409 A CN202210873409 A CN 202210873409A CN 115297073 B CN115297073 B CN 115297073B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005538 encapsulation Methods 0.000 claims abstract description 12
- 230000008521 reorganization Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/90—Buffering arrangements
- H04L49/9057—Arrangements for supporting packet reassembly or resequencing
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention provides an E1 service transmission method and device. The E1 service transmission method comprises the following steps: slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice; reorganizing each data frame slice according to a preset format; and carrying out Ethernet encapsulation on the recombined data frame slices with the preset number. The invention cuts the data frame of the E1 service by selecting the specific byte number and encapsulates each obtained data frame slice in a specific format, thereby realizing the beneficial effects of reducing the transmission delay of the E1 service and improving the bandwidth utilization rate.
Description
Technical Field
The present invention relates to the field of data processing, and in particular, to a method and apparatus for transmitting an E1 service.
Background
With the rapid development of data traffic, 5G networks gradually move to mainstream, but conventional E1 traffic still needs to be transmitted in the network.
In general, when the E1 service accesses the packet switched network, a circuit emulation technique is adopted. The bandwidth of E1 service is about 2Mbps after circuit simulation, and the 5G network introduces the technology of hard slicing, and the minimum granularity is 10Mbps. Therefore, when E1 service enters a small particle slicing network, there is a problem of transmission efficiency, and the bandwidth utilization rate is only about 20%; meanwhile, the simulation processing time delay of the E1 service is not in accordance with the time delay requirement in the 5G network, and a method for improving the E1 service time delay and optimizing the transmission efficiency is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides an E1 service transmission method and device.
In a first aspect, the present invention provides an E1 service transmission method, where the E1 service transmission method includes:
slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice;
reorganizing each data frame slice according to a preset format;
and carrying out Ethernet encapsulation on the recombined data frame slices with the preset number.
Optionally, the preset number of bytes is 22 bytes.
Optionally, the step of reorganizing each data frame slice according to a preset format includes:
adding 6 bits of overhead to each data frame slice.
Optionally, the overhead of the 6 bits includes:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
Optionally, the preset number is 4.
In a second aspect, the present invention further provides an E1 service transmission apparatus, where the E1 service transmission apparatus includes:
the slicing module is used for slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice;
the reorganization module is used for reorganizing each data frame slice according to a preset format;
and the packaging module is used for carrying out Ethernet packaging on the recombined data frame slices with the preset number.
Optionally, the preset number of bytes is 22 bytes.
Optionally, the recombination module is configured to:
adding 6 bits of overhead to each data frame slice.
Optionally, the overhead of the 6 bits includes:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
Optionally, the preset number is 4.
In the invention, a data frame of E1 service is sliced according to the preset byte number to obtain a data frame slice; reorganizing each data frame slice according to a preset format; and carrying out Ethernet encapsulation on the recombined data frame slices with the preset number. The invention cuts the data frame of the E1 service by selecting the specific byte number and encapsulates each obtained data frame slice in a specific format, thereby realizing the beneficial effects of reducing the transmission delay of the E1 service and improving the bandwidth utilization rate.
Drawings
Fig. 1 is a flow chart of an embodiment of a method for E1 service transmission according to the present invention;
fig. 2 is a schematic diagram of a format of a reassembled data frame slice according to an embodiment of the E1 service transmission method of the present invention;
fig. 3 is a schematic diagram illustrating ethernet encapsulation performed in an embodiment of the E1 service transmission method of the present invention;
fig. 4 is a schematic functional block diagram of an embodiment of the E1 service transmission device of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In a first aspect, an embodiment of the present invention provides an E1 service transmission method.
In an embodiment, referring to fig. 1, fig. 1 is a flowchart of an embodiment of a method for E1 service transmission according to the present invention. As shown in fig. 1, the E1 service transmission method includes:
step S10, slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice;
in this embodiment, the total of 32 bytes in 1E 1 service data frame, and slices with different byte numbers will affect the delay, and selecting a proper slice word can balance the delay reduction and reasonable packet length setting.
Specifically, when the preset byte number is 24 bytes, each code rate is adjusted to 2.12m,2.12m is 125 us=265 bits, that is, 256 bits are adjusted to 265 bits, each 199 bits is a frame, each frame needs to have a padding bit number=199 (265-256)/265=6.75 bits, the total number of 24 bytes of the payload is 192 bits, the frame frequency is 93.75us, and the required bandwidth is:
(8+2+2+100+4＝116)×8×10666＝9.89Mbps
9.89Mbps is less than 10.101Mbps (FGU rate).
Specifically, when the preset number of bytes is 23 bytes, each code rate is adjusted to 2.12m,2.12m is adjusted to 265 bits by 125us=265 bits, that is, 256 bits are adjusted to 265 bits, each 191 bits is adjusted to one frame, each frame needs to have padding bit number=191 (265-256)/265=6.48 bits, (note: 191=23 bytes is 8 bits, and the like), and the total number of 23 bytes of the payload is 184 bits, the frame rate is 89.84us, and the required bandwidth is:
(8+2+2+96+4＝112)×8×11130＝9.97Mbps
9.97Mbps less than 10.101Mbps (FGU Rate)
(note: 96= (23+1) bytes 8 bits, similar to the following
Specifically, when the preset byte number is 22 bytes, each code rate is adjusted to 2.12m,2.12m is 125 us=265 bits, that is, 256 bits are adjusted to 265 bits, each frame is 183 bits, each frame needs to be filled with a number of bits=183 is (265-256)/265=6.2 bits, the total number of 22 bytes of the payload is 176 bits, the frame frequency is 85.93us, and the required bandwidth is:
(8+2+2+92+4＝108)×8×11637＝10.05Mbps
10.05Mbps is less than 10.101Mbps (FGU rate).
Specifically, when the preset byte number is 21 bytes, each path of code speed is adjusted to 2.12m,2.12m is adjusted to 265 bits by 125us=265 bits, that is, 256 bits are adjusted to 265 bits, each 174 bits is a frame, each frame needs to be filled with a bit number=174 is (265-256)/265=5.9 bits, the total of 21 bytes of the payload is 168 bits, the frame frequency is 82.03us, and the required bandwidth is:
(8+2+2+88+4＝104)×8×12190＝10.142Mbps
10.142Mbps is greater than 10.101Mbps (FGU Rate)
It can be seen that slicing the data frame of the E1 service according to 22 bytes is the optimal way.
Further, in an embodiment, the preset number of bytes is 22 bytes.
In this embodiment, the data frame of the E1 service is sliced according to 22 bytes.
The existing packet is cut according to 32 bytes, and the transmission delay of E1 service is 125us; in this embodiment, the packets are cut according to 22 bytes, and the transmission delay of the E1 service is 86us. Therefore, the transmission delay of the E1 service can be effectively reduced through the embodiment.
Step S20, reorganizing each data frame slice according to a preset format;
in this embodiment, a frame reassembly format is preset, and after a data frame slice is obtained, each data frame slice can be reassembled according to the preset format.
Further, in an embodiment, step S20 includes:
adding 6 bits of overhead to each data frame slice.
In this embodiment, 6 bits of overhead is added for each data frame slice, which is specifically determined according to the actual needs.
Further, in an embodiment, the overhead of the 6 bits includes:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
In this embodiment, referring to fig. 2, fig. 2 is a schematic diagram of a format of a reassembled data frame slice in an embodiment of the E1 service transmission method of the present invention. As shown in fig. 2, the reassembled data frame slice includes:
2bit sync code overhead;
2bit E1 indicates overhead, and the specific value of E1 indicates overhead is 0-3;
the 1bit adjustment indicates overhead, E1 indicates a specific value of 0 or 1 of the overhead;
and 1bit of reserved overhead, by adjusting the specific value of reserved overhead, the method can be used for buffering rate deviation of each E1 service caused by own frequency offset (within an allowable range); or the reserved overhead is not used, and the corresponding value is displayed in the adjustment indication overhead to buffer the rate deviation of each E1 service due to the frequency offset (within the allowed range).
Step S30, carrying out Ethernet encapsulation on the recombined data frame slices with the preset number.
In this embodiment, the preset number is set according to time requirements, so that the finally obtained ethernet frame can be transmitted in the switching network, and the overall packet length can be reasonably controlled, thereby realizing the maximum bandwidth utilization rate. Referring to fig. 3, fig. 3 is a schematic diagram illustrating ethernet encapsulation performed in an embodiment of a method for E1 traffic transmission according to the present invention. As shown in fig. 3, an ethernet synchronization header field, an ethernet type field, and a PW label field (a physical link (optical fiber) may create a plurality of tunnels, and a PW label may be created in a tunnel, where PW labels are used to distinguish each PW in the same tunnel) are added before slicing a preset number of reassembled data frames, and a PCS field is added after slicing a preset number of reassembled data frames, to identify specific values of the preset number.
Further, in an embodiment, the preset number is 4.
In this embodiment, the 4 reassembled data frame slices are ethernet encapsulated, that is, each 4 reassembled data frame slices are encapsulated into one ethernet frame, so that the bandwidth utilization can be improved to about 80%.
In this embodiment, slicing a data frame of an E1 service according to a preset byte number to obtain a data frame slice; reorganizing each data frame slice according to a preset format; and carrying out Ethernet encapsulation on the recombined data frame slices with the preset number. According to the embodiment, the data frames of the E1 service are sliced by selecting the specific byte number, and each obtained data frame slice is packaged in a specific format, so that the beneficial effects of reducing the transmission delay of the E1 service and improving the bandwidth utilization rate are realized.
In a second aspect, the embodiment of the invention further provides an E1 service transmission device.
In an embodiment, referring to fig. 4, fig. 4 is a schematic functional block diagram of an embodiment of an E1 service transmission device according to the present invention. As shown in fig. 4, the E1 service transmission apparatus includes:
the slicing module 10 is configured to slice the data frame of the E1 service according to a preset byte number, so as to obtain a data frame slice;
a reorganizing module 20, configured to reorganize each data frame slice according to a preset format;
and the encapsulation module 30 is configured to perform ethernet encapsulation on a preset number of reassembled data frame slices.
Further, in an embodiment, the preset number of bytes is 22 bytes.
Further, in an embodiment, the reorganization module 20 is configured to:
adding 6 bits of overhead to each data frame slice.
Further, in an embodiment, the overhead of the 6 bits includes:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
Further, in an embodiment, the preset number is 4.
The function implementation of each module in the E1 service transmission device corresponds to each step in the embodiment of the E1 service transmission method, and the function and implementation process thereof are not described in detail herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (6)
1. The E1 service transmission method is characterized by comprising the following steps:
slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice;
reorganizing each data frame slice according to a preset format;
carrying out Ethernet encapsulation on a preset number of recombined data frame slices;
the step of reorganizing each data frame slice according to a preset format includes:
adding 6 bits of overhead to each data frame slice, wherein the 6 bits of overhead comprises:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
2. The E1 service transmission method of claim 1, wherein the preset number of bytes is 22 bytes.
3. The E1 service transmission method of claim 1, wherein the preset number is 4.
4. An E1 service transmission apparatus, wherein the E1 service transmission apparatus includes:
the slicing module is used for slicing the data frame of the E1 service according to the preset byte number to obtain a data frame slice;
the reorganization module is used for reorganizing each data frame slice according to a preset format;
the encapsulation module is used for carrying out Ethernet encapsulation on the recombined data frame slices with the preset number;
a reorganization module for:
adding 6 bits of overhead to each data frame slice, wherein the 6 bits of overhead comprises:
2bit sync code overhead, 2bit E1 indication overhead, 1bit adjustment indication overhead, and 1bit reserved overhead.
5. The E1 traffic transmission device according to claim 4, wherein the preset number of bytes is 22 bytes.
6. The E1 service transmission apparatus of claim 4, wherein the preset number is 4.
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