CN108965435A - It is a kind of apart from enhanced Ethernet transmission method - Google Patents
It is a kind of apart from enhanced Ethernet transmission method Download PDFInfo
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- CN108965435A CN108965435A CN201810794667.1A CN201810794667A CN108965435A CN 108965435 A CN108965435 A CN 108965435A CN 201810794667 A CN201810794667 A CN 201810794667A CN 108965435 A CN108965435 A CN 108965435A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
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Abstract
The present invention relates to information technology field more particularly to a kind of apart from enhanced Ethernet transmission method, applied to the transmitted in both directions process for passing through single channel between one first physical layer of one first communication terminal and one second physical layer of one second communication terminal and carrying out；Single channel connects the first physical layer and the second physical layer using a transmission medium；Whether Ethernet transmission method includes: the transmission range of real-time judge transmission medium less than a preset threshold；If so, setting a Preset Transfer rate for the transmission rate between the first physical layer and the second physical layer, range is in 90~110Mbit/s；If it is not, then setting the 1/10 of Preset Transfer rate for the transmission rate between the first physical layer and the second physical layer, range is in 9~11Mbit/s；Above-mentioned technical proposal makes the transmission of the signal between the first communication terminal and the second communication terminal take into account the stabilization under efficiency and long range under short distance, thus the problem of improving the limitation of Ethernet transmission range to a certain extent, and cost is relatively low.
Description
Technical field
The present invention relates to information technology fields more particularly to a kind of apart from enhanced Ethernet transmission method.
Background technique
Ethernet physical layer is located at OSI (Open System Interconnection open system interconnection, abbreviation
OSI) the bottom of reference model realizes the physical interface between equipment, as shown in Figure 1.Ethernet generally use twisted pair or
Coaxial cable etc. is used as physical medium, transmits data with 10Mbit/s or 100Mbit/s or 1000Mbit/s or higher rate.
Ethernet physical layer needs to define from the MII with MAC (Media Access Control medium access control, abbreviation MAC) layer
(Media Independent Interface medium-specific interface, abbreviation MII), until the MDI between physical medium
Implementation between (Media Dependent Interface Media Dependent Interface, abbreviation MDI).
The distance that can be transmitted between ethernet physical layer is point-to-point, related with the data frequency of transmission, frequency is higher, letter
Road decaying is bigger, and intersymbol interference is more serious, and the distance of transmission is shorter.Fig. 2 show declining for the Category-5 twisted pair of 100 meters of length
Subtract figure, with the increase of frequency, the decaying of signal is also sharply increased.By taking the 802.3bw ethernet standard that IEEE is formulated as an example,
When transmitting the data of 100Mbits/s on (a to) Category-5 twisted pair, limit connection length is at 250 meters or so.
But in the practical application of Ethernet, it is often necessary to more connection at a distance.Such as in video monitoring system, monitoring
The distance between probe and storage system may be more than 500 meters.In current solution, relay system is generallyd use, such as
Connection is divided into several sections, increases system complexity, improve overall cost by interchanger etc..
Summary of the invention
In view of the above-mentioned problems, the invention proposes a kind of apart from enhanced Ethernet transmission method, which is characterized in that answer
For passing through single channel between one first physical layer of one first communication terminal and one second physical layer of one second communication terminal
The transmitted in both directions process of progress；
The single channel connects first physical layer and second physical layer using a transmission medium；
The Ethernet transmission method includes:
Whether the transmission range of transmission medium described in real-time judge is less than a preset threshold；
If so, setting a Preset Transfer for the transmission rate between first physical layer and second physical layer
Rate, range is in 90~110Mbit/s；
If it is not, then the transmission rate between the first medium special purpose interface and the second medium special purpose interface is arranged
It is the 1/10 of the Preset Transfer rate, range is in 9~11Mbit/s.
Above-mentioned Ethernet transmission method, wherein first physical layer, which includes that the first medium that is connected is dedicated, to be connect
Mouth and a first medium relevant interface；
Second physical layer includes the second medium special purpose interface and a second medium relevant interface being connected；
The single channel is related to the second medium using the transmission medium connection first medium relevant interface
Interface.
Above-mentioned Ethernet transmission method, wherein the first medium special purpose interface and the second medium special purpose interface
Transmitted under the control of a clock signal；
The method being adjusted by the frequency to the clock signal change the first medium special purpose interface with it is described
Transmission rate between second medium special purpose interface.
Above-mentioned Ethernet transmission method, wherein the first medium special purpose interface and the second medium special purpose interface
Each clock cycle in transmit data be 4bit；
When transmission range is less than the preset threshold, by the first medium special purpose interface and the second medium is dedicated connects
The set of frequency of the clock signal of mouth is 22.5~27.5MHz；
When transmission range is greater than the preset threshold, by the first medium special purpose interface and the second medium is dedicated connects
The set of frequency of the clock signal of mouth is 2.25~2.75MHz.
Above-mentioned Ethernet transmission method, wherein when the transmission range of the transmission medium is less than the preset threshold,
Also a predetermined symbol rate, range are set by the symbol rate of the first medium relevant interface and the second medium relevant interface
In 61.7~71.7MBaud/s；
When the transmission range of the transmission medium is greater than the preset threshold, also by the first medium relevant interface and
The symbol rate of the second medium relevant interface is set as the 1/10 of the predetermined symbol rate, and range is in 6.17~7.17MBaud/
s。
Above-mentioned Ethernet transmission method, wherein the first medium relevant interface and/or the second medium correlation connect
Mouth carries out echo cancelltion when as recipient, to received signal.
Above-mentioned Ethernet transmission method, wherein the preset threshold is 250~350m.
Above-mentioned Ethernet transmission method, wherein the first medium relevant interface has one first to send voltage；It is described
Second medium relevant interface has one second to send voltage；
When transmission range is less than the preset threshold, electricity also is sent by described the first of the first medium relevant interface
Pressure is set as one first voltage rating, and the transmission voltage of the second medium relevant interface is set as one second voltage rating；
When transmission range is greater than the preset threshold, also set the transmission voltage of the first medium relevant interface to
Greater than a third voltage rating of first voltage rating, the transmission voltage of the second medium relevant interface is set greater than
One the 4th voltage rating of second voltage rating.
Above-mentioned Ethernet transmission method, wherein the third voltage rating be first voltage rating 110%~
140%；And
4th voltage rating is the 110%~140% of second voltage rating.
The utility model has the advantages that it is proposed by the present invention a kind of apart from enhanced Ethernet transmission method, so that the first communication terminal
Signal transmission between the second communication terminal takes into account the stabilization under efficiency and long range under short distance, thus to a certain degree
On the problem of improving the limitation of Ethernet transmission range, and cost is relatively low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of physical layer in existing OSI Reference Model；
Curve graph of the decaying for the Category-5 twisted pair that Fig. 2 is 100 meters about the mean change of frequency；
Fig. 3 is the step flow chart for the Ethernet transmission method that distance is enhanced in one embodiment of the invention；
Fig. 4 is first medium special purpose interface and/or second medium special purpose interface under one embodiment of the invention short-distance and medium-distance
The waveform diagram of clock signal, enable signal and data symbol；
Fig. 5 is first medium special purpose interface and/or second medium special purpose interface under one embodiment of the invention middle and long distance
The waveform diagram of clock signal, enable signal and data symbol；
Fig. 6 is first medium relevant interface and/or the signal of second medium relevant interface output in one embodiment of the invention
Waveform diagram.
Specific embodiment
Invention is further explained with reference to the accompanying drawings and examples.
In a preferred embodiment, as shown in figure 3, propose it is a kind of apart from enhanced Ethernet transmission method,
Wherein it is possible to be applied between one first physical layer of one first communication terminal and one second physical layer of one second communication terminal
The transmitted in both directions process carried out by single channel；
Single channel connects the first physical layer and the second physical layer using a transmission medium；
The Ethernet transmission method may include:
Whether the transmission range of real-time judge transmission medium is less than a preset threshold；
If so, setting a Preset Transfer rate, model for the transmission rate between the first physical layer and the second physical layer
It is trapped among 90~110Mbit/s (mbit), for example, it can be 92.5Mbit/s or 97.5Mbit/s, or
100Mbit/s or 102.5Mbit/s etc.；
If it is not, then setting the 1/ of Preset Transfer rate for the transmission rate between the first physical layer and the second physical layer
10, range is in 9~11Mbit/s, for example, it can be 9.25Mbit/s or 9.75Mbit/s or 10Mbit/s, or
10.25Mbit/s etc..
In above-mentioned technical proposal, due to being transmitted in both directions, the first communication terminal and the second communication terminal can be used as letter
Number transmitting terminal and receiving end, namely can consider the first communication terminal be integrated with transmission unit with the second communication terminal and connect
Receive unit, the transmission unit and receiving unit, which can also be combined, to be formed a transmitting-receiving mixing module and formed；Real-time judge transmission
Transmission range can also be acquired before distance, specific acquisition mode can be by reading the table prestored from a memory module
Show the parameter etc. of transmission range；The transmission medium that single channel uses can be through the physical mediums shape such as twisted pair or coaxial cable
At.
In a preferred embodiment, the first physical layer includes the first medium special purpose interface and one first being connected
Media Dependent Interface；
Second physical layer includes the second medium special purpose interface and a second medium relevant interface being connected；
Single channel is using transmission medium connection first medium relevant interface and second medium relevant interface.
In above-described embodiment, it is preferable that first medium special purpose interface and second medium special purpose interface can be in a clocks
It is transmitted under the control of signal；
Change first medium special purpose interface by the method that the frequency to clock signal is adjusted and second medium is dedicated
Transmission rate between interface.
In above-described embodiment, it is preferable that each clock cycle of first medium special purpose interface and second medium special purpose interface
The data of interior transmission can be 4bit；
When transmission range is less than preset threshold, by the clock signal of first medium special purpose interface and second medium special purpose interface
Frequency all can be 22.5~27.5MHz (megahertz), for example, can be 24MHz or 25MHz or 26MHz etc.；
When transmission range is greater than preset threshold, sender is used as in first medium special purpose interface and second medium special purpose interface
The frequency of clock signal all can be 2.25~2.75MHz, for example, can be 2.4MHz or 2.5MHz or 2.6MHz
Deng.
In above-mentioned technical proposal, as shown in figure 4, first medium special purpose interface and/or second medium special purpose interface are in short distance
A data cell in each clock cycle of clock signal TX_CLK under corresponding 4 data TX_D, and enabled letter
The high level of number TX_EN defines the data TX_D for needing to transmit；When enable signal TX_EN is low level, data TX_D is invalid；
After adjusting from 40ns (nanosecond) to the 400ns of Fig. 5 each pulse period, the data volume of transmission drops to 1/10, can be suitable for
Long distance transmission；Fig. 6 reflection be signal period on first medium relevant interface and/or second medium relevant interface it is corresponding from
15ns adjusts the signal waveform situation to 150ns, and the jump of signal is slow at this time, and the decaying by channel greatly reduces, because
This can transmit farther distance.
In above-described embodiment, it is preferable that when the transmission range of transmission medium is less than preset threshold, also by first medium phase
The symbol rate for closing interface and second medium relevant interface is set as a predetermined symbol rate, and range is in 61.7~71.7MBaud/s (million
Baud/second), for example, it can be 65MBaud/s or 66.7MBaud/s or 67MBaud/s etc.；
It is also that first medium relevant interface is related to second medium when the transmission range of transmission medium is greater than preset threshold
The symbol rate of interface is set as the 1/10 of predetermined symbol rate, and range is in 6.17~7.17MBaud/s, for example, can be
6.5MBaud/s or 6.67MBaud/s or 6.7MBaud/s etc..
In above-mentioned technical proposal, the symbol rate of first medium relevant interface and second medium relevant interface can with itself
Sending voltage, there are preset associations.
In above-described embodiment, it is preferable that first medium relevant interface and/or second medium relevant interface are as recipient
When, echo cancelltion can be carried out to received signal.
In above-described embodiment, it is preferable that first medium relevant interface has one first to send voltage；Second medium correlation connects
Mouth has one second to send voltage；
When transmission range is less than preset threshold, one the also is set by the first of first medium relevant interface the transmission voltage
One voltage rating, the transmission voltage of second medium relevant interface are set as one second voltage rating；
When transmission range is greater than preset threshold, the transmission voltage of first medium relevant interface is also set greater than first
The transmission voltage of one third voltage rating of voltage rating, second medium relevant interface is set greater than the one of the second voltage rating
4th voltage rating.
In above-described embodiment, it is preferable that third voltage rating is the 110%~140% of the first voltage rating；And
4th voltage rating is the 110%~140% of the second voltage rating, for example, the ratio can be 122%,
Or 124% or 125% or 126% or 128% etc..
In above-mentioned technical proposal, for example, the first voltage rating can be 1.0V (volt)；Second voltage rating can be
1.0V；Third voltage rating can be 1.2V；4th voltage rating can be 1.2V.
In a preferred embodiment, preset threshold is 250~350m (rice), for example, it can be 260m, or
270m or 280m or 290m or 300m or 310m or 320m etc..
In conclusion it is proposed by the present invention a kind of apart from enhanced Ethernet transmission method, it is applied to one first communication
The transmitted in both directions carried out between one first physical layer of terminal and one second physical layer of one second communication terminal by single channel
Process；Single channel connects the first physical layer and the second physical layer using a transmission medium；Ethernet transmission method includes: to sentence in real time
Whether the transmission range of disconnected transmission medium is less than a preset threshold；If so, by between the first physical layer and the second physical layer
Transmission rate is set as a Preset Transfer rate, and range is in 90~110Mbit/s；If it is not, then by the first physical layer and the second object
Transmission rate between reason layer is set as the 1/10 of the Preset Transfer rate, and range is in 9~11Mbit/s；Above-mentioned technical proposal
So that the signal transmission between first medium special purpose interface and second medium special purpose interface take into account efficiency under short distance and grow away from
Stabilization under, thus the problem of improving the limitation of Ethernet transmission range to a certain extent, and cost is relatively low.
By description and accompanying drawings, the exemplary embodiments of the specific structure of specific embodiment are given, based on present invention essence
Mind can also make other conversions.Although foregoing invention proposes existing preferred embodiment, however, these contents are not intended as
Limitation.
For a person skilled in the art, after reading above description, various changes and modifications undoubtedly be will be evident.
Therefore, appended claims should regard the whole variations and modifications for covering true intention and range of the invention as.It is weighing
The range and content of any and all equivalences, are all considered as still belonging to the intent and scope of the invention within the scope of sharp claim.
Claims (9)
1. a kind of apart from enhanced Ethernet transmission method, which is characterized in that one first applied to one first communication terminal
The transmitted in both directions process carried out between physical layer and one second physical layer of one second communication terminal by single channel；
The single channel connects first physical layer and second physical layer using a transmission medium；
The Ethernet transmission method includes:
Whether the transmission range of transmission medium described in real-time judge is less than a preset threshold；
If so, setting Preset Transfer speed for the transmission rate between first physical layer and second physical layer
Rate, range is in 90~110Mbit/s；
If it is not, then setting the Preset Transfer speed for the transmission rate between first physical layer and second physical layer
The 1/10 of rate, range is in 9~11Mbit/s.
2. Ethernet transmission method according to claim 1, which is characterized in that first physical layer includes being connected
One first medium special purpose interface and a first medium relevant interface；
Second physical layer includes the second medium special purpose interface and a second medium relevant interface being connected；
The single channel connects the first medium relevant interface and the second medium relevant interface using the transmission medium.
3. Ethernet transmission method according to claim 2, which is characterized in that the first medium special purpose interface and described
Second medium special purpose interface is transmitted under the control of a clock signal；
Change the first medium special purpose interface and described second by the method that the frequency to the clock signal is adjusted
Transmission rate between medium-specific interface.
4. Ethernet transmission method according to claim 3, which is characterized in that the first medium special purpose interface and described
The data transmitted in each clock cycle of second medium special purpose interface are 4bit；
When transmission range is less than the preset threshold, by the first medium special purpose interface and the second medium special purpose interface
The set of frequency of the clock signal is 22.5~27.5MHz；
When transmission range is greater than the preset threshold, by the first medium special purpose interface and the second medium special purpose interface
The set of frequency of the clock signal is 2.25~2.75MHz.
5. Ethernet transmission method according to claim 2, which is characterized in that small in the transmission range of the transmission medium
When the preset threshold, also set the symbol rate of the first medium relevant interface and the second medium relevant interface to
One predetermined symbol rate, range is in 61.7~71.7MBaud/s；
When the transmission range of the transmission medium is greater than the preset threshold, also by the first medium relevant interface and described
The symbol rate of second medium relevant interface is set as the 1/10 of the predetermined symbol rate, and range is in 6.17~7.17MBaud/s.
6. Ethernet transmission method according to claim 2, which is characterized in that the first medium relevant interface and/or
The second medium relevant interface carries out echo cancelltion when as recipient, to received signal.
7. Ethernet transmission method according to claim 1, which is characterized in that the preset threshold is 250~350m.
8. Ethernet transmission method according to claim 2, which is characterized in that the first medium relevant interface has one
First sends voltage；The second medium relevant interface has one second to send voltage；
When transmission range is less than the preset threshold, also the first transmission voltage of the first medium relevant interface is set
It is set to one first voltage rating, the transmission voltage of the second medium relevant interface is set as one second voltage rating；
When transmission range is greater than the preset threshold, also the transmission voltage of the first medium relevant interface is set greater than
One third voltage rating of first voltage rating, the transmission voltage of the second medium relevant interface are set greater than described
One the 4th voltage rating of the second voltage rating.
9. Ethernet transmission method according to claim 8, which is characterized in that the third voltage rating is described first
The 110~140% of voltage rating；And
4th voltage rating is the 110~140% of second voltage rating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110855399A (en) * | 2019-11-26 | 2020-02-28 | 苏州裕太车通电子科技有限公司 | Method for increasing transmission distance of Ethernet |
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