CN103986629B - Network terminal equipment and control method thereof - Google Patents
Network terminal equipment and control method thereof Download PDFInfo
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- CN103986629B CN103986629B CN201410250112.2A CN201410250112A CN103986629B CN 103986629 B CN103986629 B CN 103986629B CN 201410250112 A CN201410250112 A CN 201410250112A CN 103986629 B CN103986629 B CN 103986629B
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Abstract
The invention provides network terminal equipment and a control method thereof. The network terminal equipment comprises at least two network cable connecting holes, a switching circuit, a control circuit and a processing circuit, wherein the switching circuit is coupled to the network cable connecting holes; the switching circuit is used for outputting a first signal to the control circuit; when two of the network cable connecting holes are connected to an identical network cable, the first signal is in a rectangular wave state; the control circuit is coupled to the switching circuit; after the control circuit receives the first signal, time delay is shielded so as to generate a second signal; if the first signal is in a rectangular wave state, and the level of the second signal is located in a predetermined section due to the control circuit; the processing circuit is coupled to the control circuit and the switching circuit; if the level of the second signal is located in the predetermined level section, the processing circuit automatically disconnects the communication between the switching circuit and the processing circuit.
Description
Technical field
The present invention relates to a kind of network-termination device and its control method, and possess multiple grid lines in particular to one kind
The network-termination device and its control method of connecting hole.
Background technology
With the development of the network technology, network has been popularized in family, school, company's line number and mechanism.Setting up network system
During system, various electronic installations can be linked to world-wide web or Local Area Network by network-termination device.
Network-termination device possesses multiple grid line connecting holes, for being linked to electronic installation after grid line grafting.In frame
If during numerous and diverse network system, same grid line may be connected to two grid line connecting holes by user accidentally, and be formed
Loopback (loop).Once there is loopback, the signal for being exported cannot obtain corresponding reply, and produce the loss of a large amount of packages.
Thus, it will waste ample resources, and other grid line connecting holes can also be affected.
The content of the invention
It is an object of the invention to provide a kind of network-termination device and its control method, which utilizes the side of hardware controls
Formula so that loopback can be detected, and then effectively exclude.
According to an aspect of the invention, it is proposed that a kind of network-termination device.Network-termination device includes at least two grid lines
Connecting hole, a switched circuit, a control circuit and a process circuit.Switched circuit couples this little network connection hole.Switched circuit
One first signal is exported to control circuit.When wherein the two of this little grid line connecting hole are connected to same grid line, the
One signal forms a square wave state.Control circuit couples switched circuit.Control circuit receive the first signal after, shielding time delay with
Produce a secondary signal.If the first signal is square wave state, control circuit makes the level of secondary signal be located at a predetermined level
It is interval.Process circuit couples control circuit and switched circuit.If it is interval that the level of secondary signal is located at predetermined level, process circuit
Automatically cut off the communication of switched circuit and process circuit.
According to an aspect of the invention, it is proposed that a kind of control method of network-termination device.Network-termination device include to
Few two grid line connecting holes, a switched circuit, a control circuit and a process circuit.Switched circuit exports one first signal to control
Circuit processed.One secondary signal of control circuit output is to process circuit.The control method of network-termination device is comprised the following steps.When
When wherein the two of this little grid line connecting hole are connected to same grid line, the first signal forms a square wave state.Shielding
The first signal of time delay is producing secondary signal so that if the first signal is square wave state, and the level of secondary signal is pre- positioned at one
Determine level interval.If it is interval that the level of secondary signal is located at predetermined level, process circuit automatically cuts off switched circuit and processes electricity
The communication on road.
Describe the present invention below in conjunction with the drawings and specific embodiments, but it is not as a limitation of the invention.
Description of the drawings
Fig. 1 illustrates the schematic diagram of network-termination device；
Fig. 2 illustrates the schematic diagram of the control circuit of the present embodiment；
Fig. 3 A illustrate signal graph of the network-termination device in start；
Fig. 3 B illustrate network-termination device in the nonevent signal graph of loopback；
Fig. 3 C illustrate signal graph of the network-termination device when loopback occurs；
Fig. 3 D illustrate signal graph of the network-termination device when loopback is excluded；
Fig. 4 illustrates control method flow chart of the network-termination device when loopback occurs；
Fig. 5 illustrates control method flow chart of the network-termination device when loopback is excluded.
Wherein, reference
1000：Network-termination device
110：Grid line connecting hole
120：Switched circuit
130：Control circuit
140：Process circuit
700：Bipolar junction transistors
800：GMII
900：Grid line
E0：ERR pins
L0：Predetermined value
L1：LOOPLED pins
M1、M11、M12、M13：MR pins
R3：RESET pins
S11：First signal
S12、S13：M signal
S2：Secondary signal
S401、S402、S403、S501、S502、S503：Process step
T1、T2、T3：Time point
Specific embodiment
Below in conjunction with the accompanying drawings the structural principle and operation principle of the present invention are described in detail：
Fig. 1 is refer to, which illustrates the schematic diagram of Network Termination Type 1 000.Network Termination Type 1 000 is, for example, an ether
Data coaxial cable transmits (Ethernet over Coax, EOC) equipment.Network Termination Type 1 000 includes at least two grid lines
Connecting hole 110,120, one control circuit (controlling circuit) 130 of a switched circuit (switching circuit)
And a process circuit (processing circuit) 140.Each grid line connecting hole 110 can couple a grid line.Grid line connects
It is, for example, Registered Jack 45 (RJ45) connecting hole to connect hole 110.Switched circuit 120 couples this little network connection hole 110,
With from outer received signal or to outside transmission signal.Switched circuit 120 is coupled to control circuit 130.Switched circuit 120 is exported
One first signal S11 is to control circuit 130.Control circuit 130 is connected to process circuit 140.The transmission of control circuit 130 one second
Signal S2 is to process circuit 140.Process circuit 140 is to control the media independence between switched circuit 120 and process circuit 140
Interface (Media Independent Interface, MII) 800.Switched circuit 120, control circuit 130 and process circuit 140
For example it is a chip or a circuit board respectively.
Numerous and diverse network system is being set up, same grid line 900 may be connected to two grid lines by user accidentally
Connecting hole 110, and form loopback (loop).Once there is loopback, the signal for being exported cannot obtain corresponding reply, and produce
The loss of a large amount of packages.Thus, it will waste ample resources, and other grid line connecting holes 110 and the network terminal
The running of 1000 entirety of equipment can also be affected.
Running of the present embodiment by hardware such as switched circuit 120, control circuit 130 and process circuits 140 so that network
Terminal unit 1000 is able to the generation for detecting loopback, to exclude the situation of loopback as quickly as possible.
In the present embodiment, the first signal S11 is transmitted to control electricity by a LOOPLED pin L1 of switched circuit 120
The one MR pin M1 on road 130.Secondary signal S2 is transmitted to process circuit 140 by a RESET pin R3 of control circuit 130
One ERR pin E0.
Fig. 2 is refer to, which illustrates the schematic diagram of the present embodiment control circuit 130.In the present embodiment, control circuit 130
Including three control units 131,132,133.This little control unit 131,132,133 is for example a chip respectively.
In the present embodiment, 131,132,133 tandem of control unit connection.One bipolar junction transistors (bipolar
Junction transistor, BJT) 700 base stage B is directly or indirectly coupled to the LOOPLED pins of switched circuit 120
L1, collector C of bipolar junction transistors 700 are directly or indirectly coupled to the MR pin M11 of control unit 131, two-carrier
One emitter-base bandgap grading E of junction transistor 700 then directly or indirectly couples an earth terminal.Control unit 131 is coupled to control unit 132
MR pin M12, control unit 132 are coupled to the MR pin M13 of control unit 133.In control circuit 130, control unit 131
Receive the first signal S11 and after bipolar junction transistors 700, transmit to control unit 131.Control unit 131 is shielded
Time delay is producing M signal S12.After control unit 132 receives M signal S12, shield time delay to produce M signal S13.
After control unit 133 receives M signal S13, shield time delay to produce secondary signal S2.That is, control circuit 130 connects
The first signal S11 is received, and after shielding three times of time delay of control unit 131,132,133, to produce secondary signal S2 simultaneously
Export to ERR pin E1.According to the characteristic of shielding time delay, secondary signal S2 does not correspond to the state of the first signal S11, but
Corresponding to the first signal S11 through shielding the state after time delay.Therefore, when the first signal S11 is square wave state, the first letter
State after number S11 shielding time delay is stable low level state, and corresponding secondary signal S2 will be high level state.
In order to how clear explanation the present embodiment realizes loopback detection by way of hardware controls, below more with signal graph
And flow chart detailed description is as follows.Fig. 3 A～Fig. 3 D are refer to, Fig. 3 A illustrate signal of the Network Termination Type 1 000 in start
Figure, Fig. 3 B illustrate signal graph of the Network Termination Type 1 000 when loopback does not occur, and Fig. 3 C illustrate Network Termination Type 1 000 and exist
Signal graph when loopback occurs, Fig. 3 D illustrate signal graph of the Network Termination Type 1 000 when loopback is excluded.
With the comparison of Fig. 3 B and Fig. 3 C, following elder generation illustrates that loopback does not occur the signal difference occurred with loopback.Such as Fig. 3 B
Shown, when loopback does not occur, the first signal S11 is that positioned at horizontality, now the level of secondary signal S2 is located at one first
Predetermined level is interval, e.g. less than predetermined value L0, and is located at low level state.As shown in Figure 3 C, when at time point T2
During raw loopback, the first signal S11 is converted to square wave state by horizontality, and now the level of secondary signal S2 is located at one second
Predetermined level is interval, and (level is higher than predetermined to be e.g. changed into high level state from low level state (level is less than predetermined value L0)
Value L0).
After secondary signal S2 is sent to process circuit 140, if secondary signal S2 is located at low level state, process circuit 140
Can learn that loopback does not occur；If secondary signal S2 is located at high level state, process circuit 140 can learn that loopback occurs.
The following is the order according to Fig. 3 A～Fig. 3 D, sequentially illustrate Network Termination Type 1 000 " start ", " loopback is not sent out
Life ", " loopback generation ", four kinds of situations of " loopback exclusion ".Fig. 3 A are refer to, when Network Termination Type 1 000 is opened in time point T1
During machine, the level of the first signal S11 and secondary signal S2 is all driven high, and maintains horizontality and the first letter positioned at high level
, after shielding time delay three times (e.g. three sections 200 milliseconds of shielding time delays), secondary signal S2 is accordingly back to low for number S11
Level state.That is, in start process, after secondary signal S2 is briefly driven high level for a period of time, can still be back to
Low level state.Consequently, it is possible to process circuit 140 will not judge the generation of loopback by accident.
Fig. 3 B are refer to, when Network Termination Type 1 000 does not occur loopback, the first signal S11 maintains horizontal
State, secondary signal S2 then maintain low level state.Consequently, it is possible to process circuit 140 judges that loopback does not occur.
Fig. 3 C are refer to, Network Termination Type 1 000 there occurs loopback in time point T2.Please further and with reference to Fig. 4, which is painted
Show control method flow chart of the Network Termination Type 1 000 when loopback occurs.In step S401, in time point T2, grid line
Wherein the two of connecting hole 110 when being connected to same grid line and loopback occurring, and the first signal S11 is converted into by horizontality
Square wave state.The half period of the first signal S11 is, for example, 420 milliseconds.
In step S402, shielding time delay the first signal S11 of control circuit 130, so that secondary signal S2 is located at high level
State.Specifically, the present embodiment passes through three control units 131,132,133 so that the first signal S11 is through shielding time delay
For a period of time after (e.g. 200 milliseconds), M signal S12 is exported.M signal S12 is again through shielding time delay for a period of time
After (e.g. 200 milliseconds), M signal S13 is exported.M signal S13 is again through shielding time delay for a period of time (e.g. 200
Millisecond) after, export secondary signal S2.That is, the first signal S11 (e.g. amounts to 600 through three times of shielding time delay
Millisecond) after, export secondary signal S2.As the half period (e.g. 420 milliseconds) of the first signal S11 is less than control circuit 130
Shielding delay length (e.g. 600 milliseconds) so that secondary signal S2 is maintained at high level state.
In another embodiment, the shielding delay length of control circuit 130 can be 400～800 milliseconds, as long as the first letter
The half period of number S11 can be less than the shielding delay length of control circuit 130, you can make secondary signal S2 be maintained at high electricity
Level state.
In step S403, as secondary signal S2 is high level state, process circuit 140 automatically cuts off switched circuit
120 with the communication of the GMII 800 of process circuit 140.User can find network-termination device at this moment immediately
1000 exception, and set about pulling out the grid line of two grid line connecting hole 110 of grafting, exclude the situation of loopback.
Fig. 3 D are refer to, user is eliminating the sn wrap-around issue of Network Termination Type 1 000 in time point T3.Please be another
And with reference to Fig. 5, which illustrates control method flow chart of the Network Termination Type 1 000 when loopback is excluded.In step S501,
Time point T3, when one end of the grid line 900 of two grid line connecting holes 110 of connection is removed, the first signal S11 is wavy by rectangle
State is converted into horizontality.
In step S502, shielding time delay the first signal S11 of control circuit 130, so that secondary signal S2 is located at low level
State.Specifically, maintain the first signal S11 of horizontality through shielding time delay three times (e.g. three sections 200 milliseconds
Shielding time delay) after, secondary signal S2 is accordingly back to low level state.
In step S503, as secondary signal S2 is that for low level state, process circuit 140 automatically replies switched circuit
120 with the communication of the GMII 800 of process circuit 140.
In sum, the Network Termination Type 1 000 of the present embodiment can realize the inspection of loopback by way of hardware designs
Survey, and automatically cut off the communication of switched circuit 120 and process circuit 140, enable the user to carry out the exclusion of loopback immediately.
When loopback is excluded, Network Termination Type 1 000 can also automatically reply the communication of switched circuit 120 and process circuit 140, with
Normally use for user.
In above-described embodiment, control circuit 130 is explaining with three control units 131,132,133.In other realities
Apply in example, control circuit 130 can also be that one chip is constituted or be made up of the chip of two, more than four.Each
Plant in embodiment, as long as the total length of the shielding time delay of control circuit 130 can be more than the half period of the first signal S11, i.e.,
It is capable of achieving above-mentioned control method.
Certainly, the present invention can also have other various embodiments, in the case of without departing substantially from spirit of the invention and its essence, ripe
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (16)
1. a kind of network-termination device, it is characterised in that include：
At least two grid line connecting holes；
One switched circuit, couples those grid line connecting holes, and the switched circuit exports one first signal to a control circuit, when this
When wherein the two of a little grid line connecting holes are connected to same grid line, first signal forms a square wave state；
The control circuit, couples the switched circuit, and the control circuit includes multiple control units, and respectively the control unit is to receive
One input signal simultaneously exports an output signal, if the input signal is higher than a predetermined value, the output signal is less than the predetermined value；
If the input signal is less than the predetermined value, the output signal is higher than the predetermined value；After the control circuit receives first signal,
Shield time delay to produce a secondary signal；If first signal is the square wave state, the control circuit makes the secondary signal
It is interval that level is located at a predetermined level；And
One process circuit, couples the control circuit and the switched circuit, if the level of the secondary signal is located at the predetermined level area
Between, the process circuit automatically cuts off the communication between the switched circuit and the process circuit.
2. network-termination device according to claim 1, it is characterised in that positioned at first signal of the square wave state
Half period less than the control circuit shielding delay length.
3. network-termination device according to claim 1, it is characterised in that those control unit tandems connect, to shield
Cover time delay for several times, and make the level of the secondary signal be located at predetermined level interval.
4. network-termination device according to claim 1, it is characterised in that first signal is by the one of the switched circuit
LOOPLED pins are transmitted to a MR pins of the control circuit.
5. network-termination device according to claim 1, it is characterised in that the secondary signal by the control circuit
RESET pins are transmitted to an ERR pins of the process circuit.
6. network-termination device according to claim 1, it is characterised in that the shielding delay length of the control circuit is
400～800 milliseconds.
7. network-termination device according to claim 1, it is characterised in that a base stage coupling of a bipolar junction transistors
A LOOPLED pins of the switched circuit are connected to, a collector of the bipolar junction transistors is coupled to the one of the control circuit
MR pins.
8. network-termination device according to claim 1, it is characterised in that when one end removal of the grid line, this
One signal is a horizontality by the square wave State Transferring；If first signal is the level by the square wave State Transferring
State, the control circuit change the secondary signal, so that the level of the secondary signal is not located at predetermined level interval；If this
The level of binary signal is not located at predetermined level interval and the communication between the switched circuit and the process circuit has been turned off, at this
Reason circuit recovers the communication having been turned off between the switched circuit and the process circuit automatically.
9. a kind of control method of network-termination device, the network-termination device include at least two grid line connecting holes, an exchange
Circuit, a control circuit and a process circuit, the control circuit include multiple control units, and respectively the control unit is to receive one
Input signal simultaneously exports an output signal, if the input signal is higher than a predetermined value, the output signal is less than the predetermined value；If
The input signal is less than the predetermined value, then the output signal is higher than the predetermined value；The switched circuit exports one first signal and extremely should
Control circuit, one secondary signal of control circuit output is to the process circuit, it is characterised in that the control method includes：
When wherein the two of those grid line connecting holes are connected to same grid line, it is wavy that first signal forms a rectangle
State；
Shield time delay first signal to produce the secondary signal so that if first signal is the square wave state, this second
It is interval that the level of signal is located at a predetermined level；And
If it is interval that the level of the secondary signal is located at the predetermined level, the process circuit automatically cuts off the switched circuit and the process
The communication of circuit.
10. the control method of network-termination device according to claim 9, it is characterised in that the square wave state should
Shielding delay length of the half period of the first signal less than the control circuit.
The control method of 11. network-termination devices according to claim 9, it is characterised in that those control units are connected
Formula connects, and those control unit shielding time delays for several times, and make the level of the secondary signal be located at predetermined level interval.
The control method of 12. network-termination devices according to claim 9, it is characterised in that first signal is by the friendship
The LOOPLED pins for changing circuit are transmitted to a MR pins of the control circuit.
The control method of 13. network-termination devices according to claim 9, it is characterised in that the secondary signal is by the control
One RESET pins of circuit processed are transmitted to an ERR pins of the process circuit.
The control method of 14. network-termination devices according to claim 9, it is characterised in that the shielding of the control circuit
Delay length is 400～800 milliseconds.
The control method of 15. network-termination devices according to claim 9, it is characterised in that a bipolar junction crystal
One base stage of pipe is connected to a LOOPLED pins of the switched circuit, and a collector of the bipolar junction transistors is connected to this
One MR pins of control circuit.
The control method of 16. network-termination devices according to claim 9, it is characterised in that further include：
When one end of the grid line is removed, first signal forms a horizontality；
If first signal is the horizontality by the square wave State Transferring, the control circuit changes the secondary signal, so that
It is interval that the level of the secondary signal is not located at the predetermined level；And
If the level of the secondary signal is not located at predetermined level interval and the communication between the switched circuit and the process circuit
Have been turned off, the process circuit recovers the communication having been turned off between the switched circuit and the process circuit automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250112.2A CN103986629B (en) | 2014-06-06 | 2014-06-06 | Network terminal equipment and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410250112.2A CN103986629B (en) | 2014-06-06 | 2014-06-06 | Network terminal equipment and control method thereof |
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| Publication Number | Publication Date |
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| CN103986629A CN103986629A (en) | 2014-08-13 |
| CN103986629B true CN103986629B (en) | 2017-04-12 |
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| CN201410250112.2A Active CN103986629B (en) | 2014-06-06 | 2014-06-06 | Network terminal equipment and control method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056224A (en) * | 2007-05-31 | 2007-10-17 | 杭州华三通信技术有限公司 | A loop detection method and device for the network device |
| CN201234257Y (en) * | 2008-07-16 | 2009-05-06 | 谢世锋 | Telecommunication network house entering system |
| CN101611591A (en) * | 2007-12-14 | 2009-12-23 | 索尼株式会社 | Electronic installation and being used for is judged the method in the loop of electronic installation |
| CN102970059A (en) * | 2012-12-24 | 2013-03-13 | 上海斐讯数据通信技术有限公司 | EOC (Ethernet over coax) self-loop detection system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140050099A1 (en) * | 2012-08-20 | 2014-02-20 | Chi-Feng Lin | Network Device and Method for Loop Detection |
-
2014
- 2014-06-06 CN CN201410250112.2A patent/CN103986629B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101056224A (en) * | 2007-05-31 | 2007-10-17 | 杭州华三通信技术有限公司 | A loop detection method and device for the network device |
| CN101611591A (en) * | 2007-12-14 | 2009-12-23 | 索尼株式会社 | Electronic installation and being used for is judged the method in the loop of electronic installation |
| CN201234257Y (en) * | 2008-07-16 | 2009-05-06 | 谢世锋 | Telecommunication network house entering system |
| CN102970059A (en) * | 2012-12-24 | 2013-03-13 | 上海斐讯数据通信技术有限公司 | EOC (Ethernet over coax) self-loop detection system and method |
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| CN103986629A (en) | 2014-08-13 |
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