CN101841513B - Encapsulation and de-encapsulation method for frame of physical layer in EOC (Ethernet Over Coax) network - Google Patents
Encapsulation and de-encapsulation method for frame of physical layer in EOC (Ethernet Over Coax) network Download PDFInfo
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Abstract
The invention discloses an encapsulation method for a frame of physical layer in an EOC (Ethernet Over Coax) network. The encapsulation method comprises the following steps of: encapsulating all Ethernet frames of the EOC network in a period of time into one frame of physical layer; using all Ethernet frames in a period of time as the data part of the frame of physical layer; adding a frame header of the frame of physical layer before the data part, and/or adding the frame tail of the frame of physical layer after the data part. The frame header and/or the frame tail comprise physical layer channel information; all Ethernet frames in a period of time share the physical layer channel information. The invention further comprises a de-encapsulation method for frame of physical layer in EOC (Ethernet Over Coax) network, comprising the following steps of: extracting the data part of the frame of physical layer and recovering one or a plurality of Ethernet frames. In the invention, all Ethernet frames in the same frame of physical frame share the same physical layer channel information, so that the transmission efficiency is improved.
Description
Technical field
The present invention relates to a kind of method of physical layer process data of terminal equipment of EOC network.
Background technology
CHINA RFTCOM Co Ltd is used for the cable TV signal of transfer of unidirectional originally.In order to take full advantage of the CHINA RFTCOM Co Ltd resource, Broadcast and TV system carries out bidirectional rebuilding to unidirectional cable TV network gradually, makes the cable TV signal that it can transfer of unidirectional, can transmit two-way data-signal again.
Current, the backbone network of Broadcast and TV system has been realized fiberize, only in the nearest kilometer range of user or wired coaxial cable.At Fiber to the home cost still in the too high situation, in order to save cost, need to be at existing wired transmission over coaxial cable network signal.
EOC (Ethernet over COAX, Ethernet transmits based on coaxial cable) network is a kind of method at wired transmission over coaxial cable ethernet frame.Ethernet frame is mainly used in transmitting at twisted-pair feeder, and is not suitable for direct wired transmission over coaxial cable at the EOC network.
See also Fig. 1, the method of the physical layer process ethernet frame of EOC network is at present: the physical layer of the terminal equipment of EOC network (comprising local side apparatus and ustomer premises access equipment) is a physical layer frame (or being called physical layer transmission stream) with each ethernet frame Reseal, each ethernet frame is as the data division of each physical layer frame, before this data division, add in addition the frame head of physical layer frame, and/or after this data division, add the postamble of physical layer frame.
There is a drawback in said method, owing to be a physical layer frame with each ethernet frame Reseal, and the physical layer channel information that the frame head of each physical layer frame and/or postamble comprise is repetition, this has just caused the waste of transmitting data in physical layer.
Summary of the invention
Technical problem to be solved by this invention provides encapsulation and the de-encapsulation method of physical layer frame in a kind of EOC network, and the method can improve the efficiency of transmission of physical layer.
For solving the problems of the technologies described above, the method for packing of physical layer frame is in the EOC network of the present invention, all ethernet frames in the period of EOC network are encapsulated as a physical layer frame, with the data division of all ethernet frames in the described period as physical layer frame, before this data division, add the frame head of physical layer frame, and/or after this data division, add the postamble of physical layer frame.
Described frame head and/or postamble comprise physical layer channel information, and all ethernet frames in the described period are shared these physical layer channel information.
The de-encapsulation method of physical layer frame is in the EOC network of the present invention, extracts the data division of described physical layer frame, recovers one or more ethernet frames.
The present invention can make all ethernet frames in the Same Physical layer frame share identical physical layer channel information, has improved efficiency of transmission.
Description of drawings
Fig. 1 is the schematic diagram of the method for packing of physical layer frame in the existing EOC network;
Fig. 2 a is the descending period of half-duplex EOC network and the schematic diagram of up period;
Fig. 2 b is the downstream cycle of full duplex EOC network and the schematic diagram of upper line period;
Fig. 3 is the schematic diagram of the method for packing of physical layer frame in the EOC network of the present invention;
Fig. 4 is the schematic diagram of the de-encapsulation method of physical layer frame in the EOC network of the present invention;
Fig. 5 is the schematic diagram of a specific embodiment of the method for packing of physical layer frame in the EOC network of the present invention;
Fig. 6 is the schematic diagram of specific embodiment of the frame structure of a physical layer frame forming in the EOC network of the present invention;
Fig. 7 is the schematic diagram of slice in the frame structure of a physical layer frame forming in the EOC network of the present invention.
Embodiment
The EOC network comprises half-duplex and two kinds of patterns of full duplex, sees also Fig. 2 a, and downlink communication and uplink communication can not carry out simultaneously in the half-duplex EOC network.Descending period of local side apparatus alternate allocation and up period.See also Fig. 2 b, downlink communication and uplink communication can carry out simultaneously in the full duplex EOC network, so downlink communication and uplink communication all are continuous.Local side apparatus defines respectively separately independently downstream cycle and upper line period.The present invention is encapsulated as a physical layer frame with all ethernet frames in the period of EOC network, described " period " refers to a descending period or a up period to half-duplex EOC network, and full duplex EOC network is referred to a downstream cycle or a upper line period.
See also Fig. 3, the method for packing of physical layer frame comprises the steps: in the EOC network of the present invention
The 1st step added the ethernet frame header information before each ethernet frame, the ethernet frame header information is abbreviated as h and represents;
In the 2nd step, the ethernet frame that in the period all has been added h is divided into a plurality of data blocks with regular length, and last data block can less than regular length or fill to reach regular length;
The 3rd step added physical layer segmentation header information before each data block after cutting apart, the physical layer segmentation header information is abbreviated as H and represents;
The 4th step, each data block that has added H to be encoded with a kind of forward error correction (FEC, foward errorcorrect) method, the check information of generation is abbreviated as F and represents, F is joined after each data block;
Add H before, add each data block of F as a physical layer segmentation afterwards;
The 5th step connected all physical layer segmentation successively, formed the data division of a physical layer frame, added frame head before this data division, and/or add postamble after this data division, formed a physical layer frame; Described frame head and/or postamble comprise physical layer channel information.
Above-mentioned h is used for receiving terminal and recovers ethernet frame, also is used for the situation that a physical layer segmentation comprises two or more ethernet frames, comprises positional information and indication information two parts.The position of next h in the positional information indication current physical layer segmentation wherein, if there is not next h in the current physical layer segmentation, then positional information is invalid.Whether indication information indicating positions information wherein is effective, and whether the data of ethernet frame are effective, the initial or end mark of ethernet frame etc.
Above-mentioned H is used for the transmission reliability of physical layer segmentation, also is used for the situation that an ethernet frame is crossed over two or more physical layer segmentation, comprises positional information and indication information two parts.The position of first h in the positional information indication current physical layer segmentation wherein, if there is not h in the current physical layer segmentation, then positional information is invalid.Whether indication information indicating positions information wherein is effective, and whether the data of physical layer segmentation are effective, the initial or end mark of physical layer segmentation etc.
See also Fig. 4, the de-encapsulation method of physical layer frame comprises the steps: in the EOC network of the present invention
In the 1st step, frame head and/or the postamble of removal physical layer frame only keep data division, and data division is decomposed into a plurality of physical layer segmentation;
The 2nd step, each physical layer segmentation is carried out the forward error correction verification, when the mistake that occurs correcting, give up this physical layer segmentation;
In the 3rd step, after the forward error correction verification, give up the F of all physical layer segmentation;
The 4th goes on foot, and reads successively the H of each physical layer segmentation, and the h in each physical layer segmentation;
When an ethernet frame is fully in a physical layer segmentation, recover this ethernet frame;
When a physical layer segmentation comprises an above ethernet frame, recover a described above ethernet frame;
When an ethernet frame is crossed over two or more physical layer segmentation, read described two or more physical layer segmentation header information, recover this ethernet frame;
Repeated for the 4th step until recover all ethernet frames.
The de-encapsulation method of physical layer frame is to recover ethernet frame according to H and h from physical layer frame in the above-mentioned EOC network.Begin again after the method does not need whole physical layer frame received to recover, only need to can recover take physical layer segmentation as unit.
The below provides the encapsulation of physical layer frame in the EOC network of the present invention and a specific embodiment of de-encapsulation method.
A kind of implementation of given first h, the length of h are two bytes, and the first byte is indicating bit (Indicator), are abbreviated as i and represent (positional information); The second byte is pointer (Pointer), is abbreviated as p and represents (indication information).Low three bits among the i include effective information, wherein the 0th bit indication back to back p valid pointer whether thereafter; Whether effectively data the 1st bit indication finishes from back to back p to next i or to the current physical layer segmentation ethernet frame data; Next i after the current h of the 2nd bit indication or the end of physical layer segmentation be the end of an ethernet frame whether.P points to the position of next i in the current physical layer segmentation, if there is not next i, then p is invalid.The scope of p is confined to the current physical layer segmentation, can not cross over a plurality of physical layer segmentation.
Then provide a kind of implementation of H, the length of H is two bytes, and the first byte is indicating bit, is abbreviated as with I to represent (positional information); The second byte is pointer, is abbreviated as P and represents (indication information).Low three bits among the I include effective information, and the 0th bit indication wherein be back to back P valid pointer whether thereafter; The indication of the 1st bit is from the next i (if i existence) of back to back P to current H after or whether effective to the data the end (if i does not exist) of current physical layer segmentation; The 2nd bit indicated the whether end of an ethernet frame of end of next i after the current H or current physical layer segmentation.P points to the position of first i in the current physical layer segmentation, if there is not i, then P is invalid.The scope of P is confined to the current physical layer segmentation, can not cross over a plurality of physical layer segmentation.
See also Fig. 5, the process of the encapsulation of physical layer frame is as follows in the EOC network of the present invention:
Use MII interface in IEEE 802.3 standards as the data passing interface of data link layer and physical layer in the EOC network.TX_EN is effective ethernet frame of high expression, and TX_EN is low expression frame period (IPG).
The 1st step, the h of adding two bytes before each ethernet frame.In addition, for enough intervals are arranged between the ethernet frame that guarantees receiving terminal, need to keep the time period of IPG, physical layer is inserted the invalid ethernet frame of same length in the time period of former IPG, and invalid ethernet frame is abbreviated as IPG-2 and represents.These IPG-2 can be dropped during reception, but the time period of reservation correspondence is out vacant.
The 2nd step took 186 bytes as a plurality of data blocks as unit with the continuous data that has added the ethernet frame of h and IPG-2, and last data block can or fill to reach 186 bytes less than 186 bytes.
The 3rd step was the H that the data block (last data block can less than 186 bytes) of 186 bytes adds two bytes before in each length, and forming length is the data block of 188 bytes.
The 4th step, be that the data block (last data block can less than 188 bytes) of 188 bytes is with RS (204 with each length, 188) (RS (204,188) be a kind of FEC coding method, also can adopt other FEC coding methods) encode, produce the F of 16 bytes, F is joined after the data block that each length is 188 bytes, forming length is the physical layer segmentation of 204 bytes.
If the length of last data block, fills first complete zero less than 188 bytes to 188 bytes, do again RS (204,188) coding, produce 16 byte F and afterwards full zero padding is abandoned.
The 5th step connected all physical layer segmentation successively, formed the data division of a physical layer frame, added frame head before this data division, and/or add postamble after this data division, formed a physical layer frame; Described frame head and/or postamble comprise physical layer channel information.
The frame structure of the physical layer frame that finally obtains as shown in Figure 6.Each h is comprised of i and p, and the next i of each p sensing current physical layer segmentation (if present; If there is no then p is invalid).Each H is comprised of I and P, and first i of each P sensing current physical layer segmentation (if present; If there is no then P is invalid).
The process of the decapsulation of physical layer frame shown in Figure 6 is as follows:
In the 1st step, frame head and/or the postamble of removal physical layer frame only keep data division, and data division is decomposed into a plurality of physical layer segmentation;
The 2nd step, each physical layer segmentation is carried out the forward error correction verification, when the mistake that occurs correcting, give up this physical layer segmentation;
In the 3rd step, after the forward error correction verification, give up the F of all physical layer segmentation;
The 4th step, read I and P that the 1st physical layer segmentation starts two bytes,
Open up the ethernet frame of a sky as present frame when initial.
When the 0th bit of I indication P effectively and the 1st bit of I when indicating the next i of position the 2nd bit effective and I of the data of (not comprising this two positions itself) between the position (being next i) that P points to of current P after indicating current H to be exactly the end mark of ethernet frame, current ethernet frame is finished simultaneously to the data of (not comprising this two positions itself) between the position that P the points to data as current ethernet frame in the position of extracting current P.Then again open up the ethernet frame of a sky as present frame.
When the 0th bit of I indication P effectively and the 1st bit of I when indicating the next i of position the 2nd bit effective and I of the data of (not comprising this two positions itself) between the position (being next i) that P points to of current P after indicating current H not to be the end mark of ethernet frame, the position of extracting current P is to the data of (not comprising this two positions itself) between the position that P the points to data as current ethernet frame, but can not finish current ethernet frame.
When the 0th bit of I indication P effectively and the 1st bit of the I position of indicating current P during to the data invalid (the 2nd bit ignoring I at this moment) of (not comprising this two positions itself) between the position (being next i) that P points to, abandon the data of the position of current P to (not comprising this two positions itself) between the position of P sensing.
When the 0th bit indication P of I the 1st bit invalid and I indicates position the 2nd bit effective to the data between the end of current physical layer segmentation and I of current P to indicate the end of current physical layer segmentation to be exactly the end mark of ethernet frame, the position of extracting current P (does not comprise current P between the end of current physical layer segmentation, but comprise the end of segmentation) data as the data of current ethernet frame, finish simultaneously current ethernet frame.Then again open up the ethernet frame of a sky as present frame.
When the 0th bit indication P of I the 1st bit invalid and I indicates position the 2nd bit effective to the data between the end of current physical layer segmentation and I of current P to indicate the end of current physical layer segmentation not to be the end mark of ethernet frame, the position of extracting current P (does not comprise current P between the end of current physical layer segmentation, but comprise the end of segmentation) data as the data of current ethernet frame, but can not finish current ethernet frame.
Indicate the position of current P when the 0th bit indication P of I the 1st bit invalid and I and when invalid (ignoring the 2nd bit of I this moment), abandon the position of current P to the data between the end of current physical layer segmentation to the data between the end of current physical layer segmentation.
Behind the I that handles the current physical layer section switch, P, if P is effective, namely also have the 2nd i, p in this physical layer segmentation, continue by all i, p in the complete segmentation of step process identical with processing I, P.
Handle successively all physical layer segmentation by same steps as, the decapsulation of this physical layer frame namely is disposed.
The 4th step of said method has following features:
One, I, P and i, p have roughly the same form, and processing procedure is identical when decapsulation.
Its two, each physical layer segmentation is independently.
Its three, each physical layer segmentation contains I, the P of a beginning at least, zero or a plurality of i, p.We can each I, P (i, p) and heel thereof with data (no matter whether effective) as a slice (fragment).Physical layer segmentation just can be regarded as the structure that is together in series by pointer by one or more slice so.The process of decapsulation be exactly according to the I of physical layer segmentation fixed position, P as initial pointer, then find in turn all slice, and from slice, parse the process of all data.
See also Fig. 7, the oval square frame among the figure namely is slice.
Its four, each ethernet frame can be regarded as that the one or more slice that are distributed in one or more physical layer segmentation form.The process of decapsulation is exactly the process that the slice of these distributions is extracted and forms an ethernet frame.
Its five, according to above explanation, the meaning of low three bits just can be interpreted as among the I (i):
The 0th bit of I (i): represent whether the P among the current slice is effective, effectively then show to have next slice in the current physical layer segmentation, invalidly show that then current slice has been last slice in the segmentation.
The 1st bit of I (i): represent whether the data among the current slice are effective.
The 2nd bit of I (i): represent whether last slice of the ethernet frame at its place of current slice.
The encapsulation of physical layer frame and de-encapsulation method have following beneficial effect in the EOC network of the present invention:
One, encapsulation reconciliation encapsulation operation is all finished in physical layer, is fully transparent for the data link layer on it, and can make all ethernet frames in the Same Physical layer frame share identical physical layer channel information, has improved efficiency of transmission.
Its two, the h of just two bytes that each ethernet frame increases, the just H of two bytes that each physical layer segmentation increases and the F of 16 bytes are conducive to data link layer to the scheduling of transfer of data.
They are three years old, newly-designed physical layer frame adopts list structure, form the ethernet frame (and not needing all ethernet frames that a regular length is arranged) that to process all lengths in the process of physical layer segmentation, do not need in the process of decapsulation physical layer frame to store whole physical layer frame but take physical layer segmentation as unit.
Its four, each physical layer segmentation has independently H and F, a physical layer segmentation is made mistakes and can not affected next physical layer segmentation.
Claims (8)
1. the method for packing of physical layer frame in the EOC network is characterized in that described method comprises the steps:
In the 1st step, add the ethernet frame header information before each ethernet frame in a plurality of ethernet frames;
In the 2nd step, the ethernet frame that in the period of EOC network all has been added the ethernet frame header information is divided into a plurality of data blocks with regular length, and the length of last data block is less than regular length or fill to reach regular length;
In the 3rd step, add physical layer segmentation header information before each data block after cutting apart;
The 4th step, each data block that has added the physical layer segmentation header information to be encoded with a kind of forward error correction, the check information of generation joins after each data block;
Add physical layer segmentation header information before, add each data block of check information as a physical layer segmentation afterwards;
The 5th step connected all physical layer segmentation successively, formed the data division of a physical layer frame, added frame head before this data division, and/or add postamble after this data division, formed a physical layer frame; Described frame head and/or postamble comprise physical layer channel information.
2. the method for packing of physical layer frame in the EOC network according to claim 1 is characterized in that described frame head and/or postamble comprise physical layer channel information, and all ethernet frames in the described period are shared these physical layer channel information.
3. the method for packing of physical layer frame in the EOC network according to claim 1, it is characterized in that, a described period refers to a descending period or the up period in the half-duplex EOC network, perhaps refers to a downstream cycle or a upper line period in the full duplex EOC network.
4. the method for packing of physical layer frame in the EOC network according to claim 1 is characterized in that,
Described ethernet frame header information comprises positional information and indication information, the position of next ethernet frame header information in the positional information indication current physical layer segmentation wherein, then this positional information is invalid if there is not next ethernet frame header information in the current physical layer segmentation; Whether indication information indicating positions information wherein is effective, and whether the data of ethernet frame are effective, the initial or end mark of ethernet frame;
Described physical layer segmentation header information comprises positional information and indication information, the position of first ethernet frame header information in the positional information indication current physical layer segmentation wherein, then this positional information is invalid if there is not the ethernet frame header information in the current physical layer segmentation; Whether indication information indicating positions information wherein is effective, and whether the data of ethernet frame are effective, the initial or end mark of ethernet frame.
5. the method for packing of physical layer frame in the EOC network according to claim 4 is characterized in that,
Described ethernet frame header information represents that with h the length of h is two bytes, and the first byte is indicating bit, represents with i; The second byte is pointer, represents with p; The 0th bit indication among the i is back to back p valid pointer whether thereafter; Whether effectively data the 1st bit indication finishes from back to back p to next i or to the current physical layer segmentation ethernet frame data; Next i after the current h of the 2nd bit indication or the end of physical layer segmentation be the end of an ethernet frame whether; P points to the position of next i in the current physical layer segmentation, if there is not next i, then p is invalid; The scope of p is confined to the current physical layer segmentation;
Described physical layer segmentation header information represents that with H the length of H is two bytes, and the first byte is indicating bit, represents with I; The second byte is pointer, represents with P; The 0th bit indication among the I is back to back P valid pointer whether thereafter; The indication of the 1st bit is from the next i of back to back P after current H or whether effective to the data the end of current physical layer segmentation; The 2nd bit indicated the whether end of an ethernet frame of end of next i after the current H or current physical layer segmentation; P points to the position of first i in the current physical layer segmentation, if there is not i, then P is invalid; The scope of P is confined to the current physical layer segmentation.
6. the method for packing of physical layer frame in the EOC network according to claim 4 is characterized in that described method comprises the steps:
The 1st step, the ethernet frame header information of adding two bytes before each ethernet frame;
The 2nd step took 186 bytes as a plurality of data blocks as unit with the continuous data that has added the ethernet frame of ethernet frame header information, and last data block is less than 186 bytes or fill to reach 186 bytes;
The 3rd step was the physical layer segmentation header information that adds two bytes before the data block of 186 bytes in each length, and forming length is the data block of 188 bytes;
The 4th step was that the data block of 188 bytes is encoded with RS (204,188) with each length, produces the check information of 16 bytes and it is joined after the data block that each length is 188 bytes, and forming length is the physical layer segmentation of 204 bytes;
When the length of last data block during less than 188 byte, fill first complete zero to 188 bytes, do again RS (204,188) coding, full zero padding is abandoned after producing the check information of 16 bytes;
The 5th step connected all physical layer segmentation successively, formed the data division of a physical layer frame, added frame head before this data division, and/or add postamble after this data division, formed a physical layer frame; Described frame head and/or postamble comprise physical layer channel information.
7. a data division that extracts physical layer frame in the EOC network is characterized in that to recover the de-encapsulation method of one or more ethernet frames described method comprises the steps:
In the 1st step, frame head and/or the postamble of removal physical layer frame only keep data division, and data division is decomposed into a plurality of physical layer segmentation;
The 2nd step, each physical layer segmentation is carried out the forward error correction verification, when the mistake that occurs correcting, give up this physical layer segmentation;
In the 3rd step, after the forward error correction verification, give up the check information of all physical layer segmentation;
The 4th goes on foot, and reads successively the physical layer segmentation header information of each physical layer segmentation, and the ethernet frame header information in each physical layer segmentation;
When an ethernet frame is fully in a physical layer segmentation, recover this ethernet frame;
When a physical layer segmentation comprises an above ethernet frame, recover a described above ethernet frame;
When an ethernet frame is crossed over two or more physical layer segmentation, read the header information of described two or more physical layer segmentation, recover this ethernet frame;
Repeated for the 4th step until recover all ethernet frames.
8. de-encapsulation method according to claim 7 is characterized in that, described ethernet frame header information represents that with h the length of h is two bytes, and the first byte is indicating bit, represents with i; The second byte is pointer, represents with p; The 0th bit indication among the i is back to back p valid pointer whether thereafter; Whether effectively data the 1st bit indication finishes from back to back p to next i or to the current physical layer segmentation ethernet frame data; Next i after the current h of the 2nd bit indication or the end of physical layer segmentation be the end of an ethernet frame whether; P points to the position of next i in the current physical layer segmentation, if there is not next i, then p is invalid; The scope of p is confined to the current physical layer segmentation;
Described physical layer segmentation header information represents that with H the length of H is two bytes, and the first byte is indicating bit, represents with I; The second byte is pointer, represents with P; The 0th bit indication among the I is back to back P valid pointer whether thereafter; The indication of the 1st bit is from the next i of back to back P after current H or whether effective to the data the end of current physical layer segmentation; The 2nd bit indicated the whether end of an ethernet frame of end of next i after the current H or current physical layer segmentation; P points to the position of first i in the current physical layer segmentation, if there is not i, then P is invalid; The scope of P is confined to the current physical layer segmentation,
The 4th step of described method specifically comprises the steps:
Read I and the P of the 1st physical layer segmentation beginning;
Open up the ethernet frame of a sky as present frame when initial;
When the 0th bit indication P of I effectively and the 1st bit of I when indicating the next i of the data of position between the position that P points to the 2nd bit effective and I of current P after indicating current H to be exactly the end mark of ethernet frame, extract the position of current P to the data of the data between the position that P points to as current ethernet frame, finish simultaneously current ethernet frame;
Then again open up the ethernet frame of a sky as present frame;
When the 0th bit of I indication P effectively and the 1st bit of I when indicating the next i of the data of position between the position that P points to the 2nd bit effective and I of current P after indicating current H not to be the end mark of ethernet frame, extract the position of current P to the data of the data between the position that P points to as current ethernet frame, but can not finish current ethernet frame;
When the 0th bit of I indication P effectively and the 1st bit of I when indicating the position of current P invalid to the data between the position that P points to, abandon the position of current P to the data between the position that P points to;
When the 0th bit indication P of I the 1st bit invalid and I indicates position the 2nd bit effective to the data between the end of current physical layer segmentation and I of current P to indicate the end of current physical layer segmentation to be exactly the end mark of ethernet frame, extract the position of current P to the data of the data between the end of current physical layer segmentation as current ethernet frame, finish simultaneously current ethernet frame, then again open up the ethernet frame of a sky as present frame;
When the 0th bit indication P of I the 1st bit invalid and I indicates position the 2nd bit effective to the data between the end of current physical layer segmentation and I of current P to indicate the end of current physical layer segmentation not to be the end mark of ethernet frame, extract the position of current P to the data of the data between the end of current physical layer segmentation as current ethernet frame, but can not finish current ethernet frame;
When the 0th bit of I indication P the 1st bit invalid and I indicates the position of current P invalid to the data between the end of current physical layer segmentation, abandon the position of current P to the data between the end of current physical layer segmentation;
Behind the I that handles the current physical layer section switch, P, if P is effective, namely also have the 2nd i, p in this physical layer segmentation, continue by all i, p in the complete segmentation of step process identical with processing I, P;
Handle successively all physical layer segmentation by same steps as, the decapsulation of this physical layer frame namely is disposed.
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| CN103856453B (en) * | 2012-11-30 | 2016-12-21 | 中国科学院沈阳自动化研究所 | A kind of data transmission method towards semiconductor production line handling system |
| CN106411471A (en) * | 2016-10-18 | 2017-02-15 | 广东高云半导体科技股份有限公司 | Ethernet data multiplexing/de-multiplexing method |
| CN114449580B (en) * | 2021-12-22 | 2024-06-11 | 西安空间无线电技术研究所 | Physical layer data segmentation and recombination method for satellite communication system |
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| WO2002035906A2 (en) * | 2000-11-01 | 2002-05-10 | Actelis Networks Ltd. | High speed access system over copper cable plant |
| CN1852265A (en) * | 2006-05-30 | 2006-10-25 | 杭州华为三康技术有限公司 | Method for synchronous frame transmitting on IP network and network apparatus for transmission |
| CN1964227A (en) * | 2005-11-11 | 2007-05-16 | 华为技术有限公司 | A method for data interaction and data transmit-receive module |
| CN101102461A (en) * | 2007-07-25 | 2008-01-09 | 梁光海 | Thee-in-one network fusion access method and device of digital TV |
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| WO2002035906A2 (en) * | 2000-11-01 | 2002-05-10 | Actelis Networks Ltd. | High speed access system over copper cable plant |
| CN1964227A (en) * | 2005-11-11 | 2007-05-16 | 华为技术有限公司 | A method for data interaction and data transmit-receive module |
| CN1852265A (en) * | 2006-05-30 | 2006-10-25 | 杭州华为三康技术有限公司 | Method for synchronous frame transmitting on IP network and network apparatus for transmission |
| CN101102461A (en) * | 2007-07-25 | 2008-01-09 | 梁光海 | Thee-in-one network fusion access method and device of digital TV |
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