CN107493521B

CN107493521B - Signal sending method and device, signal receiving method and device, and signal transmission circuit

Info

Publication number: CN107493521B
Application number: CN201610410015.4A
Authority: CN
Inventors: 陆建鑫
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-06-12
Filing date: 2016-06-12
Publication date: 2022-08-02
Anticipated expiration: 2036-06-12
Also published as: CN107493521A

Abstract

The invention provides a signal sending method and device, a signal receiving method and device and a signal transmission circuit. The sending method comprises the following steps: acquiring a designated signal pair of the optical component, wherein the designated signal pair has three level combination states; the signal to be transmitted is transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair. The invention solves the technical problem of less pin resources of the local side equipment of the optical distribution network in the related technology, thereby achieving the effect of improving the utilization rate of the pin resources of the local side equipment.

Description

Signal sending method and device, signal receiving method and device, and signal transmission circuit

Technical Field

The present invention relates to the field of signal processing, and in particular, to a signal sending method and apparatus, a signal receiving method and apparatus, and a signal transmission circuit.

Background

The optical access network is an important component of the next generation network and is also a main direction for the development of future optical communication technology. With the continuous growth of broadband services, the optical access network has a huge application market prospect as a 'nerve ending' of a network architecture.

In recent years, the construction of optical access networks has been rapidly developed in various countries around the world, and Passive Optical Networks (PONs) have been deployed on a large scale with the implementation of the strategy of 'optical access to copper and optical egress'. With the increasing demand of user bandwidth and the maturity of 10G PON technology, a PON system with a bandwidth of 1G starts to upgrade to a 10G PON, so that long-term coexistence of 1G and 10G user terminals will occur in the same Optical Distribution Network (ODN), and at this time, the central office device must support both types of terminals. One feasible method is to directly support two types in one optical module in the local side equipment, but the local side equipment requires to keep the port high density, which provides a great challenge for the optical module, the module needs to realize two service functions, the service and control signals between the motherboard and the optical module are doubled, and the number of PINs (PINs) for connecting the optical module and the motherboard is insufficient.

Aiming at the technical problem that the pin resources of the local side equipment of the optical distribution network in the related technology are few, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a signal sending method and device, a signal receiving method and device, and a signal transmission circuit, which are used for at least solving the technical problem that pin resources of local side equipment of an optical distribution network in the related art are less.

According to an aspect of the embodiments of the present invention, there is provided a signal transmission method, including: acquiring a designated signal pair of the optical component, wherein the designated signal pair has three level combination states; the signal to be transmitted is transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair.

Further, the three-level signal has three level states, and the level state of each three-level signal corresponds to a level combination state of a specific signal pair.

Further, transmitting the signal requiring transmission by a three-level signal corresponding to a level combination state of the signal requiring transmission of the designated signal pair includes: acquiring a target level combination state corresponding to a signal to be sent in three level combination states of an appointed signal; determining a target level state corresponding to a target level combination state in three level states of the three-level signal; a three-level signal having a target level state is transmitted.

Further, the designation signal includes a first control signal and a second control signal, wherein the three level combination states of the designation signal pair include any three of the following four: the first control signal is at a high level and the second control signal is at a high level, the first control signal is at a low level and the second control signal is at a high level, the first control signal is at a high level and the second control signal is at a low level, the first control signal is at a low level and the second control signal is at a low level.

According to another aspect of the embodiments of the present invention, there is provided a signal receiving method, including: receiving a three-level signal; the level combination state of a given signal pair of the optical component is determined by the level state of the three-level signal.

Further, the designation signal pair has three level combination states, and the three-level signal has three level states, each of which corresponds to one of the level combination states of the designation signal pair.

According to another aspect of an embodiment of the present invention, there is provided a signal transmission apparatus including: an acquisition unit configured to acquire a pair of designation signals of the optical component, wherein the pair of designation signals has three level combination states; a transmission unit for transmitting the signal to be transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair.

Further, the transmission unit includes: the acquisition module is used for acquiring a target level combination state corresponding to a signal to be sent in the three level combination states of the designated signal; the determining module is used for determining a target level state corresponding to a target level combination state in three level states of the three-level signal; and the sending module is used for sending the three-level signal with the target level state.

According to another aspect of an embodiment of the present invention, there is provided a signal receiving apparatus including: a receiving unit for receiving a three-level signal; and a determination unit for determining a level combination state of the designated signal pair of the optical component by a level state of the three-level signal.

According to another aspect of an embodiment of the present invention, there is provided a signal transmission circuit including: a transmission circuit for transmitting a three-level signal corresponding to a level combination state of a signal to be transmitted of a designated signal pair of the optical module, wherein the designated signal pair has three level combination states; and a receiving circuit for determining a level combination state of the designated signal pair based on a level state of the received three-level signal.

Further, the pair of designation signals includes a first control signal and a second control signal, and the transmission circuit includes: the first input end of the OR gate circuit is used for accessing a first control signal, and the second input end of the OR gate circuit is used for accessing a second control signal; the input end of the tri-state gate circuit is connected with the second control signal, and the enabling end of the tri-state gate circuit is connected with the output end of the OR gate circuit; the signal output node is connected with the output end of the tri-state gate and is also connected with the signal transmission line; the first end of the first resistor is connected with the first power supply, and the second end of the first resistor is connected with the signal output node; and the first end of the second resistor is grounded, and the second end of the second resistor is connected with the signal output node.

Further, the receiving circuit includes: the signal receiving node is connected with the transmitting circuit through a signal transmission line; a first input end of the first comparator is connected with the second power supply, a second input end of the first comparator is connected with the signal receiving node, and an output end of the first comparator is used for outputting a first control signal; and a first input end of the second comparator is connected with the third power supply, a second input end of the second comparator is connected with the signal receiving node, and an output end of the second comparator is used for outputting a second control signal.

According to another embodiment of the present invention, there is provided a storage medium that may be configured to store program code for performing the steps of: acquiring a designated signal pair of the optical component, wherein the designated signal pair has three level combination states; the signal to be transmitted is transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair.

Further, the storage medium may be further configured to store program code for performing the steps of: receiving a three-level signal; the level combination state of a given signal pair of the optical component is determined by the level state of the three-level signal.

In the embodiment of the invention, by acquiring the specified signal pair of the optical component, the specified signal pair has three level combination states; the signal to be sent is sent through the three-level signal corresponding to the level combination state of the signal to be sent of the designated signal pair, and thus, the signal to be sent through two pins can be sent through one pin, so that the technical problem that pin resources of the local side equipment of the optical distribution network in the related art are few is solved, and the technical effect of improving the utilization rate of the pin resources of the local side equipment is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention;

fig. 2 is a flowchart of a signal receiving method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a signal receiving apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a signal transmission circuit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an alternative signal transmission circuit according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

In accordance with an embodiment of the present invention, there is provided a method embodiment of a signaling method, it being noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.

The application provides a method for multiplexing pins of an optical module or an optical assembly, and particularly 2 control signals are multiplexed onto one pin. Original control signals generally adopt TTL (Transistor-Transistor logic) high and low levels to represent 2 states, and three-level signals are adopted to transmit 2 signals in the application; however, two signals generally have 4 states, and three levels can only represent 3 states, so that it is necessary to reasonably select signals that can be combined. For example, the first signal is selected as the main function, and the second signal normally operates in the first signal disable state, so that 3 states of the three-level signal can be satisfied for practical use.

In an optical module or an optical assembly, a three-level signal receiving end can recover 2 control signals only by setting appropriate comparator circuits for 2 judgment levels, and the recovered control signals can meet the requirements of internal application of the optical module. An embodiment of the present application is described in detail below with reference to fig. 1.

Fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:

in step S101, a pair of designated signals of the optical component is obtained, and the pair of designated signals has three level combination states.

Step S102 transmits the signal to be transmitted by the three-level signal corresponding to the level combination state of the signal to be transmitted of the designated signal pair.

With the above embodiment, by acquiring the pair of designation signals of the optical component, the pair of designation signals has three level combination states; the signal to be sent is sent through the three-level signal corresponding to the level combination state of the signal to be sent of the designated signal pair, and thus, the signal to be sent through two pins can be sent through one pin, so that the technical problem that pin resources of the local side equipment of the optical distribution network in the related art are few is solved, and the technical effect of improving the utilization rate of the pin resources of the local side equipment is achieved.

Optionally, the main body of the above steps may be, but is not limited to, a central office device of the optical distribution network, and the like.

In the above-described embodiment, the three-level signal has three level states, and the level state of each of the three-level signals corresponds to a level combination state of a specific signal pair.

Specifically, transmitting the signal requiring transmission by a three-level signal corresponding to a level combination state of the signal requiring transmission of the designated signal pair includes: acquiring a target level combination state corresponding to a signal to be sent in three level combination states of an appointed signal; determining a target level state corresponding to a target level combination state in three level states of the three-level signal; a three-level signal having a target level state is transmitted.

It should be noted that the designation signal includes a first control signal and a second control signal, where the three level combination states of the designation signal pair include any three of the following four states: the first control signal is at a high level and the second control signal is at a high level, the first control signal is at a low level and the second control signal is at a high level, the first control signal is at a high level and the second control signal is at a low level, the first control signal is at a low level and the second control signal is at a low level.

Through the embodiment, the control signal of the optical module or component is compressed in a three-level mode, the original 2 control signals are transmitted by introducing one three-level, and the requirement on the number of pins of the module or the optical component is reduced, so that the existing packaged module or component can realize more functions. The circuit adopting the three-level mode is simpler to realize, and can meet the application requirement in function.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases.

Example 2

According to an embodiment of the present invention, an embodiment of a method for receiving a signal is provided, and fig. 2 is a flowchart of the method for receiving a signal according to the embodiment of the present invention, as shown in fig. 2, the method includes the following steps:

step S201, receiving a three-level signal.

In step S202, the level combination state of the designated signal pair of the optical component is determined by the level state of the three-level signal.

Through the embodiment, the three-level signal is received, and the level combination state of the designated signal pair of the optical component is determined through the level state of the three-level signal, so that the signal received by two pins can be received through one pin, thereby solving the technical problem of less pin resources of the local side equipment of the optical distribution network in the related art and realizing the technical effect of improving the utilization rate of the pin resources of the local side equipment.

The above method can be applied to the receiving end of the optical assembly, but is not limited thereto. The above-mentioned designation signal pair has three level combination states, and the three-level signal has three level states, and the level state of each of the three-level signals corresponds to the level combination state of one of the designation signal pair.

The above-mentioned designation signal includes a first control signal and a second control signal, wherein the three level combination states of the designation signal pair include any three of the following four: the first control signal is at a high level and the second control signal is at a high level, the first control signal is at a low level and the second control signal is at a high level, the first control signal is at a high level and the second control signal is at a low level, the first control signal is at a low level and the second control signal is at a low level.

Through the embodiment, the control signals of the optical module or the optical assembly are compressed in a three-level mode, the original 2 control signals are transmitted by introducing one three-level, and the requirement on the number of pins of the module or the optical assembly is reduced, so that the existing packaged module or assembly can realize more functions. The circuit adopting the three-level mode is simpler to realize, and can meet the application requirement in function.

Example 3

The embodiment of the invention also provides a signal sending device. The device is used for implementing the above embodiments and preferred embodiments, and the description of the device is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 3 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention. As shown in fig. 3, the apparatus may include: an acquisition unit 31 and a transmission unit 32.

An acquisition unit 31 for acquiring a pair of designation signals of the optical component, wherein the pair of designation signals has three level combination states.

A transmission unit 32 for transmitting the signal to be transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair.

With the above embodiment, the acquisition unit acquires the pair of designation signals of the optical component, the pair of designation signals having three level combination states; the sending unit sends the signal to be sent through the three-level signal corresponding to the level combination state of the signal to be sent of the designated signal pair, and thus the signal to be sent through two pins can be sent through one pin, so that the technical problem that pin resources of the local side equipment of the optical distribution network in the related technology are few is solved, and the technical effect of improving the utilization rate of the pin resources of the local side equipment is achieved.

In the above embodiments, the transmitting apparatus may be implemented by a circuit, an integrated chip, or the like, but is not limited thereto. The three-level signal has three level states, and the level state of each three-level signal corresponds to the level combination state of a specific signal pair.

Optionally, the sending unit includes: the acquisition module is used for acquiring a target level combination state corresponding to a signal to be sent in the three level combination states of the designated signal; the determining module is used for determining a target level state corresponding to a target level combination state in three level states of the three-level signal; and the sending module is used for sending the three-level signal with the target level state.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

Example 4

The embodiment of the invention also provides a signal receiving device. The device is used for implementing the above embodiments and preferred embodiments, and the description of the device is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 4 is a schematic diagram of a signal receiving apparatus according to an embodiment of the present invention. As shown in fig. 4, the apparatus may include: a receiving unit 41 and a determining unit 42.

A receiving unit 41 for receiving the three-level signal.

A determination unit 42 for determining the level combination status of the assigned signal pair of the optical component by the level status of the three-level signal.

Through the embodiment, the receiving unit receives the three-level signal, and the determining unit determines the level combination state of the designated signal pair of the optical component according to the level state of the three-level signal, so that the signal received by two pins can be received through one pin, thereby solving the technical problem of less pin resources of the local side equipment of the optical distribution network in the related art, and realizing the technical effect of improving the utilization rate of the pin resources of the local side equipment.

The receiving device may be implemented by, but not limited to, a circuit, an integrated chip, and the like. The above-mentioned designation signal pair has three level combination states, and the three-level signal has three level states, and the level state of each of the three-level signals corresponds to the level combination state of one of the designation signal pair.

Example 5

In the existing optical module, each control signal occupies one optical module pin, especially the optical module in the PON system needs more control signals, reducing the pin requirement is one way to achieve higher integration of the module, an embodiment of the present invention further provides a signal transmission circuit, which adopts a manner of reducing the pin requirement, and fig. 5 is a schematic diagram of the signal transmission circuit according to the embodiment of the present invention. As shown in fig. 5, the circuit may include: a transmission circuit 501 and a reception circuit 502.

The transmission circuit 501 transmits a three-level signal corresponding to a level combination state of a signal to be transmitted of a pair of designation signals of an optical module, the pair of designation signals having three level combination states.

A receiving circuit 502 for determining a level combination state of the designated signal pair based on a level state of the received three-level signal.

Through the embodiment, the transmitting circuit transmits the three-level signal corresponding to the level combination state of the signal to be transmitted of the designated signal pair of the optical component, the receiving circuit determines the level combination state of the designated signal pair based on the level state of the received three-level signal, the transmitting circuit can be connected with the transmitting pin of the transmitting end, and the receiving circuit can be connected with the receiving pin of the receiving end, so that the signal to be transmitted or received by using two pins can be realized through one pin, the technical problem that the pin resources of the local side equipment of the optical distribution network in the related art are less is solved, and the technical effect of improving the utilization rate of the pin resources of the local side equipment is realized.

The transmitting circuit may be implemented as a circuit composed of a plurality of devices, or may be implemented as an integrated chip, where the transmitting circuit may be used to execute logic steps in the signal transmitting method of the present application, or to execute functions of a signal transmitting apparatus; the receiving circuit can be implemented by a circuit formed by a plurality of devices, and can also be implemented in an integrated chip manner, and the receiving circuit can be used for executing logic steps in the signal receiving method of the application, or executing functions of a signal receiving device.

Specifically, as shown in fig. 6, the pair of designated signals includes a first control signal SIG1 and a second control signal SIG2, and the transmission circuit includes: an OR gate circuit OR (which can be an OR gate electronic device OR a combined circuit), wherein a first input end of the OR gate circuit is used for connecting a first control signal, and a second input end of the OR gate circuit is used for connecting a second control signal; the input end of the TRI-state gate circuit is connected with the second control signal, and the enabling end of the TRI-state gate circuit is connected with the output end of the OR gate circuit; the signal output node J1 is connected with the output end of the tri-state gate, and is also connected with the signal transmission line; a first resistor R1, a first end of which is connected to a first power supply VCC1, and a second end of which is connected to a signal output node J1; and a second resistor R2, a first end of which is connected to ground (i.e., GND), and a second end of which is connected to the signal output node.

The receiving circuit described above includes: a signal receiving node J2 connected to the transmission circuit via a signal transmission line; a first comparator COMP1, a first input terminal of which is connected to the second power supply VCC2, a second input terminal of which is connected to the signal receiving node, and an output terminal of which is configured to output a first control signal SIG 1; and a second comparator COMP2, a first input terminal of which is connected to the third power supply VCC3, a second input terminal of which is connected to the signal receiving node, and an output terminal of which is configured to output a second control signal SIG 2.

The three levels can only represent 3 states, and it is very important to reasonably select signals that can be combined, for example, a burst uplink luminous power detection signal (Trigger) in an optical module at a PON central Office (OLT), which has a high real-time requirement and is mainly used for detecting the optical power of the burst uplink signal, and a downlink transmission prohibition signal (TxDisable) is applied in system protection switching, which also needs a high real-time property. Considering that the PON system uplink signal is controlled by the downlink signal, when the optical module prohibits transmission, the uplink does not emit light any more, and at this time, there is no need to detect the uplink optical power, so that actually two signals having 4 states can be represented by three states. The system side iTxDisable (i.e., SIG1) and iTrigger (i.e., SIG2) signals may output truth tables as shown in table 1 through or gate and tri-state gate circuits.

TABLE 1

iTxDisable	iTrigger	Tri-state gate output	TxDisable	Trigger
					1	X	1	1	0
0	1	0	0	1
					0	0	Z	0	0

In table 1:

when iTxDisable is "1", "iTrigger" is not available (represented by state "X"), "tri-state gate" outputs "1";

when iTxDisable is "0" and "iTrigger" is "1," the "tri-state gate" outputs "0";

when iTxDisable is "0" and "iTrigger" is "0," the "tri-state gate" outputs a high impedance "Z".

The voltage division is performed by two resistors after the tri-state gate, and when the "tri-state gate" outputs a high impedance, the power delivered to the subsystem is about 1/2 of VCC1 (supply voltage).

The three-level signal is recovered in the subsystem by two comparators, the decision levels of which are VCC2 (1/4 for VCC 1) and VCC3 (3/4 for VCC 1), respectively, and of course, the decision levels can be adjusted appropriately according to specific circuit conditions. As shown in the truth table of Table 1, the TxDisable can accurately recover the iTxDisable signal; when the iTxDisable is 0, the Trigger can accurately recover an iTrigger signal; when iTxDisable is "0", Trigger is always "0", that is, Trigger is in the disabled state.

Optionally, the PON central office optical module commonly uses a Reset signal (Reset) to Reset a part of the receiving circuit when or before the uplink burst signal arrives, so that the receiving circuit can quickly recover the uplink signal. In the upgrading process of the PON network, high-speed and low-speed uplink burst signals in a TDM mode exist, and a preamplifier and a limiting amplifier are indicated through a rate selection signal (Ratesel) to accurately recover signals with corresponding rates. Usually, the preamplifier and the photoelectric conversion chip are integrated in a receiving optical module (receiving TO-CAN), and the optical module is connected with a single board in an optical module. The circuit does not need to accurately obtain the rate indication during the Reset period because the burst receiving Reset process is very short, so the Reset (SIG2) and Ratesel (SIG1) can also use three levels to transfer signals. The typical implementation circuit is shown in fig. 6, and system side iRateSel (i.e., SIG1) and iReset (i.e., SIG2) signals can output truth tables as shown in table 2 through or gate and tri-state gate circuits. The multiplexing mode of the TxDisable and Trigger signals is the same, and Reset and Ratesel can work well through three-level single-line transmission. The circuit 502 (i.e., the subsystem circuit) may be present in the optical module or in the receiving optical module.

TABLE 2

iReset	iRateSel	Tri-state gate output	Reset	RateSel
					1	X	1	1	0
0	1	0	0	1
					0	0	Z	0	0

The meaning of the data in Table 2 is similar to that in Table 1 and will not be described herein.

In practical applications, the polarity of the transmitted and received signals can be achieved by adding an inverter or changing the input polarity of the comparator.

The two pairs of designated signals, the upstream burst power detection signal and the downstream transmission disable signal, the reset signal and the rate select signal, are provided for illustrative purposes only, and other pairs of signals that satisfy the conditions of the present application may be used to practice the methods of the embodiments of the present application, or to apply the apparatus and circuits of the present application.

Example 6

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s11, acquiring a designated signal pair of the optical assembly, wherein the designated signal pair has three level combination states;

s12, the signal to be transmitted is transmitted by a three-level signal corresponding to the level combination state of the signal to be transmitted of the designated signal pair.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s21, receiving a three-level signal;

s22, the level combination state of the designated signal pair of the optical component is determined by the level state of the three-level signal.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor executes, according to the program code stored in the storage medium: acquiring a designated signal pair of the optical component, wherein the designated signal pair has three level combination states; the signal to be transmitted is transmitted by a three-level signal corresponding to a level combination state of the signal to be transmitted of the designated signal pair.

Optionally, in this embodiment, the processor executes, according to the program code stored in the storage medium: receiving a three-level signal; the level combination state of a given signal pair of the optical component is determined by the level state of the three-level signal.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A signal transmission method, comprising:

acquiring a designated signal pair of an optical component, wherein the designated signal pair has three level combination states, the designated signal pair comprises two control signals needing to be sent by two pins, and the control signals comprise level signals for indicating an unavailable state, a high level state or a low level state;

and transmitting a three-level signal corresponding to a level combination state of the signals to be transmitted of the designated signal pair.

2. The transmission method according to claim 1, wherein the three-level signal has three level states, and each level state of the three-level signal corresponds to a level combination state of one of the designated signal pairs.

3. The transmission method according to claim 2, wherein transmitting a three-level signal corresponding to a level combination state of a signal that needs to be transmitted of the designated signal pair includes:

acquiring a target level combination state corresponding to the signal to be sent in the three level combination states of the designated signal;

determining a target level state corresponding to the target level combination state in three level states of the three-level signal;

transmitting the three-level signal having the target level state.

4. The transmission method according to any one of claims 1 to 3, wherein the designation signal comprises a first control signal and a second control signal, and wherein the three level combination states of the designation signal pair comprise any three of the following four states: the first control signal is at a high level and the second control signal is at a high level, the first control signal is at a low level and the second control signal is at a high level, the first control signal is at a high level and the second control signal is at a low level, the first control signal is at a low level and the second control signal is at a low level.

5. A signal receiving method, comprising:

receiving a three-level signal;

and determining the level combination state of a designated signal pair of the optical component through the level states of the three-level signals, wherein the designated signal pair comprises two control signals needing to be sent by two pins, and the control signals comprise level signals for indicating an unavailable state, a high level state or a low level state.

6. The receiving method according to claim 5, wherein the prescribed signal pair has three level combination states, and the three-level signal has three level states, and each of the level states of the three-level signal corresponds to one of the level combination states of the prescribed signal pair.

7. The receiving method according to claim 5 or 6, wherein the designation signal comprises a first control signal and a second control signal, wherein the three level combination states of the designation signal pair comprise any three of the following four states: the first control signal is at a high level and the second control signal is at a high level, the first control signal is at a low level and the second control signal is at a high level, the first control signal is at a high level and the second control signal is at a low level, the first control signal is at a low level and the second control signal is at a low level.

8. A signal transmission device, comprising:

an acquisition unit configured to acquire a pair of designation signals of an optical component, wherein the pair of designation signals has three level combination states;

and the sending unit is used for sending a three-level signal corresponding to the level combination state of the signals needing to be sent of the specified signal pair, the specified signal pair comprises two control signals needing to be sent by two pins, and the control signals comprise level signals for indicating an unavailable state, a high level state or a low level state.

9. The transmitter according to claim 8, wherein said three-level signal has three level states, each of the level states of said three-level signal corresponding to a level combination state of one of said pair of designated signals.

10. The transmission apparatus according to claim 9, wherein the transmission unit includes:

the acquisition module is used for acquiring a target level combination state corresponding to the signal to be sent in the three level combination states of the designated signal;

the determining module is used for determining a target level state corresponding to the target level combination state in three level states of the three-level signal;

a transmitting module for transmitting the three-level signal having the target level state.

11. A signal receiving apparatus, comprising:

a receiving unit for receiving a three-level signal;

and the determining unit is used for determining the level combination state of a specified signal pair of the optical component through the level state of the three-level signal, wherein the specified signal pair comprises two control signals which need to be sent by two pins, and the control signals comprise level signals for indicating an unavailable state, a high level state or a low level state.

12. A signal transmission circuit, comprising:

the optical module comprises a transmitting circuit, a receiving circuit and a control circuit, wherein the transmitting circuit is used for transmitting a three-level signal corresponding to a level combination state of a signal needing to be transmitted of a designated signal pair of an optical component, the designated signal pair has three level combination states, the designated signal pair comprises two control signals needing to be transmitted by two pins, and the control signals comprise level signals for indicating an unavailable state, a high level state or a low level state;

a receiving circuit for determining a level combination state of the designated signal pair based on a level state of the received three-level signal.

13. The circuit of claim 12, wherein the designated signal pair comprises a first control signal and a second control signal, the transmit circuit comprising:

the first input end of the OR gate circuit is used for accessing the first control signal, and the second input end of the OR gate circuit is used for accessing the second control signal;

the input end of the tri-state gate circuit is connected with the second control signal, and the enabling end of the tri-state gate circuit is connected with the output end of the OR gate circuit;

the signal output node is connected with the output end of the tri-state gate, and is also connected with a signal transmission line;

a first resistor, a first end of which is connected to a first power supply, and a second end of which is connected to the signal output node;

and the first end of the second resistor is grounded, and the second end of the second resistor is connected with the signal output node.

14. The circuit of claim 12 or 13, wherein the receiving circuit comprises:

a signal receiving node connected to the transmission circuit through a signal transmission line;

a first comparator, a first input terminal of which is connected to a second power supply, a second input terminal of which is connected to the signal receiving node, and an output terminal of which is used for outputting a first control signal;

and a first input end of the second comparator is connected with a third power supply, a second input end of the second comparator is connected with the signal receiving node, and an output end of the second comparator is used for outputting a second control signal.