CN101562488A - Method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet - Google Patents
Method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet Download PDFInfo
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- CN101562488A CN101562488A CNA2009100503353A CN200910050335A CN101562488A CN 101562488 A CN101562488 A CN 101562488A CN A2009100503353 A CNA2009100503353 A CN A2009100503353A CN 200910050335 A CN200910050335 A CN 200910050335A CN 101562488 A CN101562488 A CN 101562488A
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Abstract
The invention relates to a method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet. The method comprises the following steps: firstly obtaining distance-measuring information, namely distance between a sending end and a receiving end; utilizing frame gap to transmit high-frequency clock counting between the sending end and the receiving end, thus obtaining distance-measuring information. The sending end clock phase of an equipment sending end is transmitted to an equipment receiving end; and the equipment receiving end can restore the clock phase of the sending end on the receiving end by utilizing the distance-measuring information stored locally. The method utilizes frame gap for transmission, thus improving bandwidth utilization rate; the information transmission is not affected by delay change of packet flow and packet switching in the Ethernet; and the transmission method is simple and easy to operate.
Description
Technical field
The present invention relates to gigabit Ethernet utilizes frame gap transfer clock information to obtain the method for ranging information and in-phase clock information.
Background technology
Gigabit Ethernet technology has become the mainstream technology of high-speed local area network.Under the ever-increasing background of network bandwidth requirements, the bandwidth availability ratio that improves gigabit Ethernet has very important practical sense.
Gigabit Ethernet is supported full-duplex mode.Under full duplex mode, can insert some additional frame gaps (IPG, Inter-Packet Gap) between the ethernet frame of gigabit Ethernet media access control sublayer.Under the gigabit transmission speed, the shared bandwidth of frame gap is also very big.If can utilize frame gap transmission useful information, can effectively improve bandwidth availability ratio.Consult interrelated data, the method for utilizing frame gap transmission in-phase clock information in gigabit Ethernet is not also arranged at present.
In communication information field, transmitting apparatus and accepting device often need in-phase clock information.IEEE802.3ah has made regulation to the range finding of EPON equipment, can realize the in-phase clock transmission of Information according to this regulation this method.
Summary of the invention
The objective of the invention is to, provide a kind of method of in gigabit Ethernet, utilizing frame gap transmission in-phase clock information, to improve bandwidth availability ratio.
Technical scheme of the present invention is achieved in that
A kind of method of utilizing interframe gap transmission in-phase clock information in gigabit Ethernet is characterized in that performing step is: (1) utilizes frame gap to send the high frequency clock counting between transmitting terminal and receiving terminal, obtains ranging information; (2) with the phase place of receiving terminal canned data compensation source clock,, realize the in-phase clock transmission of Information in receiving terminal recovered clock phase place.
The method that obtains ranging information in the above-mentioned steps (1) is: count with high frequency clock at the equipment transmitting terminal, when frame gap arrives this counting is transferred to the equipment receiving terminal via frame gap; Receiving terminal receives after this information local clock and the clock synchronization that receives, and counts with this benchmark, when treating that frame gap arrives this counting is returned to transmitting terminal via frame gap; After transmitting terminal is received the passback counting, this locality counting is subtracted each other with receiving counting, the gained result is exactly a ranging information divided by 2.Receiving terminal was given in passback after transmitting terminal obtained this information, and receiving terminal is stored this ranging information.
The method that realizes the in-phase clock message transmission in the above-mentioned steps (2) is: the low frequency source clock is counted with high frequency clock at transmitting terminal, after the low-frequency clock rising edge carries out zero clearing to this counting, count again, when treating frame gap arrival the counting N after the zero clearing is transferred to receiving terminal via frame gap; High frequency clock can obtain the cycle count N of low frequency source clock to the low frequency source clock count
TAccording to N, N
TCan obtain the phase place of source clock.Ranging information with the receiving terminal storage compensates, and the phase place of clock is recovered at receiving terminal, just can realize the transmission of in-phase clock.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art:
1. utilize frame gap transfer clock information, improved bandwidth availability ratio;
2. transmission of Information is not subjected to the influence that the delay of packet traffic and packet switching in the Ethernet changes;
3. transmission method is simple.
Description of drawings
It is the system configuration general diagram of embodiment that Fig. 1 is one of the present invention;
Fig. 2 is Fig. 1 example system job information transmission schematic diagram;
Fig. 3 is the transmission course figure of the ranging information of Fig. 1 example;
Fig. 4 is the in-phase clock transmission of Information procedure chart of Fig. 1 example.
Embodiment
A preferred embodiment of the present invention accompanying drawings is as follows: present embodiment has proposed to utilize frame gap method of transmitting information between equipment transmitting terminal and equipment receiving terminal, referring to Fig. 1 according to the characteristics of gigabit Ethernet full duplex transmission mode.
Fig. 2 is a present embodiment system works message transmission schematic diagram.The equipment transmitting terminal is transferred to the equipment receiving terminal to the transmitting terminal clock phase, and the ranging information of the local storage of equipment receiving terminal utilization can recover the clock phase of transmitting terminal at receiving terminal.Fig. 3 is the transmission course figure of ranging information in the present embodiment.Count with high frequency clock at the equipment transmitting terminal, when frame gap arrives, this is counted N
0Be transferred to the equipment receiving terminal via frame gap; The clock count of distance is N between equipment transmitting terminal and the equipment receiving terminal
LReceiving terminal receives after this information local clock and the clock synchronization that receives, and with from N
0Begin to count, when treating that frame gap arrives with this counting (N
0+ N
X) return to transmitting terminal via frame gap; Transmitting terminal is counted (N to this locality after receiving the passback counting
0+ N
L+ N
X+ N
L) and receive counting (N
0+ N
X) subtract each other, be 2N
LN
LBe ranging information.Receiving terminal was given in passback after transmitting terminal obtained this information, and receiving terminal is stored this ranging information N
L
Fig. 4 is an in-phase clock transmission of Information procedure chart in the present embodiment.Obtain to carry out the recovery of in-phase clock after the ranging information.The low frequency source clock is counted with high frequency clock at the equipment transmitting terminal, after the low-frequency clock rising edge carries out zero clearing to this counting, counted again, when treating frame gap arrival the counting N after the zero clearing is transferred to receiving terminal via frame gap; High frequency clock can obtain the cycle count N of low frequency source clock to the low frequency source clock count
TAccording to N, N
TCan obtain the phase place of source clock.Ranging information N with the receiving terminal storage
LCompensate, the phase place of clock is recovered at receiving terminal, just can realize the transmission of in-phase clock.The above is a better embodiment of the present invention, is not limited to present embodiment, all any modifications of being made within the present invention spirit and principle, is equal to replacement and improvement etc., all is contained within protection scope of the present invention.
Claims (3)
1. method of utilizing interframe gap transmission in-phase clock information in gigabit Ethernet is characterized in that performing step is:
(1) utilizes frame gap between transmitting terminal and receiving terminal, to send the high frequency clock counting, obtain ranging information;
(2) with the phase place of receiving terminal canned data compensation source clock,, realize the in-phase clock transmission of Information in receiving terminal recovered clock phase place.
2. the method for in gigabit Ethernet, utilizing interframe gap transmission in-phase clock information according to claim 1, it is characterized in that the method that obtains ranging information in the described step (1) is: transmitting terminal is counted with high frequency clock, when treating frame gap arrival this counting is transferred to receiving terminal via frame gap; Receiving terminal is receive clock synchronously with local clock after receiving this information, and counts with this benchmark, when treating frame gap arrival this counting is returned to transmitting terminal via frame gap; After transmitting terminal is received the passback counting, this locality counting is subtracted each other with receiving counting, the gained result is ranging information divided by 2.Receiving terminal was given in passback after transmitting terminal obtained ranging information, and receiving terminal is stored this information.
3. the method for in gigabit Ethernet, utilizing interframe gap transmission in-phase clock information according to claim 1, it is characterized in that the method that realizes the in-phase clock message transmission in the described step (2) is: with high frequency clock the low frequency source clock is counted at transmitting terminal, after the low-frequency clock rising edge carries out zero clearing to this counting, count again, treat that when frame gap arrives this being counted N is transferred to receiving terminal via frame gap; High frequency clock can obtain the cycle count N of source clock to the low frequency source clock count
TAccording to N, N
TCan obtain the phase place of clock, compensate, can clock phase be recovered, realize the in-phase clock message transmission at transmitting terminal with described ranging information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100503353A CN101562488B (en) | 2009-04-30 | 2009-04-30 | Method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100503353A CN101562488B (en) | 2009-04-30 | 2009-04-30 | Method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101562488A true CN101562488A (en) | 2009-10-21 |
| CN101562488B CN101562488B (en) | 2011-12-21 |
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| CN2009100503353A Expired - Fee Related CN101562488B (en) | 2009-04-30 | 2009-04-30 | Method for utilizing frame gap to transmit in-phase clock information in gigabit Ethernet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457416A (en) * | 2010-10-16 | 2012-05-16 | 许勇 | Method for utilizing Ethernet frame clearance to realize sensing detection and overlying communication |
| CN104348607A (en) * | 2013-07-29 | 2015-02-11 | 深圳光启创新技术有限公司 | Method and device for automatically adjusting clock in visible light communication system |
| CN109541617A (en) * | 2018-12-11 | 2019-03-29 | 湖南迈克森伟电子科技有限公司 | A kind of high speed noncoherent communication range unit and method |
| CN111934820A (en) * | 2020-07-29 | 2020-11-13 | 烽火通信科技股份有限公司 | Management information transmission method, system and readable storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388817B (en) * | 2008-10-30 | 2011-03-30 | 上海大学 | Hundred megabyte Ethernet extra information transmission method and transmission implementing system |
-
2009
- 2009-04-30 CN CN2009100503353A patent/CN101562488B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457416A (en) * | 2010-10-16 | 2012-05-16 | 许勇 | Method for utilizing Ethernet frame clearance to realize sensing detection and overlying communication |
| CN104348607A (en) * | 2013-07-29 | 2015-02-11 | 深圳光启创新技术有限公司 | Method and device for automatically adjusting clock in visible light communication system |
| CN104348607B (en) * | 2013-07-29 | 2017-11-07 | 深圳光启智能光子技术有限公司 | Method and apparatus for clock adjust automatically in visible light communication system |
| CN109541617A (en) * | 2018-12-11 | 2019-03-29 | 湖南迈克森伟电子科技有限公司 | A kind of high speed noncoherent communication range unit and method |
| CN109541617B (en) * | 2018-12-11 | 2022-03-22 | 湖南迈克森伟电子科技有限公司 | High-speed incoherent communication ranging device and method |
| CN111934820A (en) * | 2020-07-29 | 2020-11-13 | 烽火通信科技股份有限公司 | Management information transmission method, system and readable storage medium |
| CN111934820B (en) * | 2020-07-29 | 2022-08-05 | 烽火通信科技股份有限公司 | Management information transmission method, system and readable storage medium |
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|---|---|
| CN101562488B (en) | 2011-12-21 |
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Granted publication date: 20111221 Termination date: 20140430 |