CN101369936B - Method for self negotiation adopting broad pulse - Google Patents
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Abstract
The invention discloses an auto-negotiation method using a wide pulse. The method uses the wide pulse (WLP) as a negotiation pulse for auto-negotiation between the devices in the ethernet, wherein the width of the wide pulse is from 200ns to 2000ns. The adoption of the invention can effectively conduct auto-negotiation under the condition of the distance between the devices longer than 100 meter, thereby the effective transmission distance of the ethernet is effectively expanded.
Description
Technical field
The present invention relates to the ethernet communication field, and especially, relate to a kind of method that adopts broad pulse to carry out auto-negotiation.
Background technology
In Ethernet, can support and high efficiency as far as possible link for apparatus for establishing between the equipment that communicates, need to carry out auto-negotiation between the equipment, with the ability to work of understanding miscellaneous equipment, the attribute informations such as speed of support.
With the 100Base-Tx among the IEEE802.3 is example, as shown in Figure 1, device A and equipment B all outwards send link pulse (FLP) fast, after every equipment is received the quick link pulse (FLP) of opposite equip., from quick link pulse (FLP), obtain the information of opposite equip., then every equipment all oneself speed and duplex be set to the optimization model that both sides support, and begin to send Fast Ethernet idle signal (FAST ETHERNET IDLE), just set up link then.
In the agreement of present IEEE802.3, the transmission range of regulation 10M and 100M Ethernet is 100 meters.
Therefore, at this distance, the negotiation pulse of IEEE regulation is 100ns, and this width also is realistic requirement.The waveform of the auto-negotiation pulse NLP/FLP of regulation among the IEEE 802.3 has been shown among Fig. 2.As shown in the figure, the width T4 of the pulse signal of this standard N LP/FLP is about 100ns.But, when the distance between the equipment that carries out auto-negotiation during greater than 100 meters, owing to decay, crosstalk, influence of various factors such as interference, the pulse of this regulation can't be carried out the equipment of auto-negotiation and discern, so can't carry out auto-negotiation between the equipment and foundation links.
Yet, do not propose as yet about how to carry out the technical scheme of auto-negotiation at the Ethernet of 100 meters long distances more than the distance at present.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is to provide a kind of scheme that adopts broad pulse to carry out auto-negotiation.
To achieve these goals, according to one embodiment of present invention, provide a kind of method that adopts broad pulse to carry out auto-negotiation.
In the method, broad pulse is used as the negotiation pulse of carrying out auto-negotiation in the network between the equipment, wherein, the width 200ns to 2000ns of broad pulse.
Wherein, Network Transmission distance is as required determined the width of broad pulse.When the Network Transmission distance was 500 meters, the width of broad pulse was 400ns; When the Network Transmission distance was 1000 meters, the width of broad pulse was 400ns to 1000ns.
And auto-negotiation can comprise following processing: the equipment that carries out auto-negotiation in the Ethernet is notified the attribute information of itself mutually by broad pulse; Equipment is provided with himself according to the attribute information from miscellaneous equipment, makes the equipment that carries out auto-negotiation support mutually; And after equipment is finished the configuration of himself, set up link.
Wherein, the attribute information of the mode of operation of equipment can comprise: half-duplex/full duplex, speed, ability to work and required information under supporting greater than the situation of 100 meters long distance.
By technique scheme of the present invention, can in the distance between the equipment under the situation more than 100 meters, carry out auto-negotiation effectively, thereby effectively expand the effective propagation path of Ethernet.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that carries out auto-negotiation between two equipment according to correlation technique;
Fig. 2 is the oscillogram according to employed pulse in the auto-negotiation process of correlation technique;
Fig. 3 is the schematic diagram that compares according to the broad pulse of the embodiment of the invention and pulse according to correlation technique; And
Fig. 4 is the schematic diagram that the broad pulse according to the embodiment of the invention is used for the example of equipment room auto-negotiation.
Embodiment
In the present embodiment, provide a kind of employing broad pulse to carry out the method for auto-negotiation (Autonegotiation), to solve the problem that the auto-negotiation pulse information quality that occurs when transmission range is higher than 100 meters in the Ethernet descends and maybe can't discern.
Carrying out in the method for auto-negotiation according to the employing broad pulse of the embodiment of the invention, broad pulse is being used as the negotiation pulse of carrying out auto-negotiation in the network (that is, Ethernet) between the equipment, wherein, the width 200ns to 2000ns of broad pulse.
Particularly, the size of the distance that the width of broad pulse can transmit according to concrete needs is decided, preferably, when the distance that transmits 500 meters (about) time, width that can broad pulse is set to about 400ns, when Network Transmission distance is 1000 meters, pulse duration can be defined as 400ns (about) to 1000ns (about) in value.
As shown in Figure 3, have pulse width T 4 according to the wide negotiation pulse signal (WLP) of present embodiment, this width promptly, greater than 100ns, therefore can be supported the negotiation of farther distance greater than the width of consulting pulse in the correlation technique.
In the present embodiment, the process of auto-negotiation can comprise following processing: the equipment that carries out auto-negotiation in the Ethernet is notified the attribute information of itself mutually by broad pulse; Equipment is provided with himself according to the attribute information of the miscellaneous equipment that obtains from broad pulse, makes the equipment that carries out auto-negotiation support mutually, and allocation optimum, that is, reach the negotiation both sides and all support and most effective configuration; And after equipment is finished the configuration of himself, set up link.
Here, attribute information can comprise: half-duplex/full duplex, speed, ability to work and required information etc. under situation about supporting greater than 100 meters long distance.
The characteristics of the auto-negotiation of IEEE802.3 standard (Autonegotiation) are: the handshake mechanism that adopts the negotiation speed of standard, automatically (for example be configured to most probable connection, 100M full duplex etc.), thus can make equipment and the apparatus interconnection old or that do not support auto-negotiation of supporting auto-negotiation.
Support the ethernet node of the auto-negotiation (Autonegotiation) of IEEE802.3 to link together, before communicating, must on link rate and full-duplex/half-duplex pattern, reach an agreement by twisted-pair feeder.It is realized by link pulse.When finding new main frame in the network, send link pulse to connect.Two types link pulse is arranged, and a kind of is Normal Link Pulse (NLP), and a kind of is fast link pulse (FLP).The link pulse of 10base-T (NLP) is made up of simple half-wave pulse, when from+1 to-1 volt data-signal sends when idle, send line to (TX) on, send link pulse.After Fast Ethernet occurred, International Standards Organization had kept the back compatible problem very modestly, was adaptively selected simple and effective physical signalling negotiation mechanism.Fast link pulse (FLP) is carrying the information of representing link rate and duplexing situation by Normal Link Pulse (NLP).
To illustrate the process that adopts the broad pulse Negotiation Technology below.
As shown in Figure 4, distance between device A and the equipment B is greater than 100 meters, device A outwards sends the WLP according to the embodiment of the invention, and equipment B also sends WLP, device A " parallel detection " is behind the WLP of opposite end, therefrom extract the information such as speed, half-or full-duplex, ability to work of equipment B, and for supporting information that long-range network needs etc.; After same equipment B detects the WLP of opposite end, therefrom extract the information such as speed, half-or full-duplex, ability to work of device A and for supporting information that long-range network needs etc.; After exchanging attribute information, device A and B will oneself be configured to the optimization model that both sides can both support.
In sum, by means of technical scheme of the present invention, can in the distance between the equipment under the situation more than 100 meters, carry out auto-negotiation effectively, thereby effectively expand the effective propagation path of Ethernet.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method that adopts broad pulse to carry out auto-negotiation is characterized in that, broad pulse is used as the negotiation pulse of carrying out described auto-negotiation in the Ethernet between the equipment, wherein, and the width 200ns to 2000ns of described broad pulse.
2. employing broad pulse according to claim 1 is carried out the method for auto-negotiation, it is characterized in that, Network Transmission distance is as required determined the width of described broad pulse.
3. employing broad pulse according to claim 2 is carried out the method for auto-negotiation, it is characterized in that, when the Network Transmission distance was 500 meters, the width of described broad pulse was 400ns.
4. employing broad pulse according to claim 2 is carried out the method for auto-negotiation, it is characterized in that, when the Network Transmission distance was 1000 meters, the width of described broad pulse was 400ns to 1000ns.
5. carry out the method for auto-negotiation according to each described employing broad pulse in the claim 1 to 4, it is characterized in that described auto-negotiation comprises following processing:
The described equipment that carries out described auto-negotiation in the Ethernet is notified the attribute information of itself mutually by described broad pulse;
Described equipment is provided with himself according to the described attribute information from other described equipment, makes the described equipment that carries out described auto-negotiation support mutually;
After described equipment is finished the configuration of himself, set up link.
6. employing broad pulse according to claim 5 is carried out the method for auto-negotiation, it is characterized in that the described attribute information of described equipment comprises: half-duplex/full duplex, speed, ability to work and required information under supporting greater than the situation of 100 meters long distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101202138A CN101369936B (en) | 2007-08-13 | 2007-08-13 | Method for self negotiation adopting broad pulse |
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| CN2007101202138A CN101369936B (en) | 2007-08-13 | 2007-08-13 | Method for self negotiation adopting broad pulse |
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| CN101369936B true CN101369936B (en) | 2011-04-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656711A2 (en) * | 1993-12-03 | 1995-06-07 | Advanced Micro Devices, Inc. | Negotiation systems for communication networks |
| CN1881979A (en) * | 2005-05-31 | 2006-12-20 | 杭州华为三康技术有限公司 | Ethernet physical layer low-speed transmission realizing method and its applied network apparatus |
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- 2007-08-13 CN CN2007101202138A patent/CN101369936B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656711A2 (en) * | 1993-12-03 | 1995-06-07 | Advanced Micro Devices, Inc. | Negotiation systems for communication networks |
| CN1881979A (en) * | 2005-05-31 | 2006-12-20 | 杭州华为三康技术有限公司 | Ethernet physical layer low-speed transmission realizing method and its applied network apparatus |
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