WO2015135163A1

WO2015135163A1 - Signal processing device

Info

Publication number: WO2015135163A1
Application number: PCT/CN2014/073310
Authority: WO
Inventors: 李胜平; 叶志成; 余长亮; 张红广; 徐成植; 陶明慧
Original assignee: 华为技术有限公司
Priority date: 2014-03-12
Filing date: 2014-03-12
Publication date: 2015-09-17
Also published as: CN105103446A; CN105103446B

Abstract

The present invention relates to the field of communications. Disclosed is a signal processing device capable of solving the problem of high power consumption when a media access control (MAC) layer processes data in a multistage amplitude modulated communication system. The specific solution is: acquiring initial signals; dividing the initial signals into N-1 signal paths; acquiring a selection control signal; and according to the selection control signal, selecting one or more of M signal paths for logic decoding, so that the MAC layer only needs to process the decoding signals of some of the initial signals, thus saving bandwidth resources, and reducing power consumption during data processing of the MAC layer.

Description

Signal processing device

Technical field

The present invention relates to the field of communications, and in particular, to a signal processing apparatus.

Background technique

With the development of communication networks, in order to make the network bandwidth meet the needs of most users, most of the processing of signals uses multi-order or high-order modulation and coding, in order to increase the rate of data transmission.

Generally, for a communication system with multi-level amplitude modulation coding, the receiver will decode and receive all data, which requires the MAC (Media Access Control) layer of the receiving end to support a higher transmission rate, but not every user. Both require a higher transmission rate. Therefore, the existing technical solutions cause waste of bandwidth resources, and the power consumption of the data processed by the medium access control layer at the receiving end is too high.

Summary of the invention

Embodiments of the present invention provide a signal processing apparatus capable of solving the problem of excessive power consumption of a medium access control layer processing data in a multi-level amplitude modulation communication system.

In order to achieve the above object, embodiments of the present invention use the following technical solutions:

In a first aspect, a signal processing apparatus includes:

a receiver, configured to acquire an initial signal, and transmit the initial signal to a shunt circuit, where the initial signal is an electrical signal encoded by an N-th order amplitude modulation, and N is an integer greater than 2; the shunt circuit, For receiving the initial signal, separating the initial signal into an M-channel signal, wherein M=N-1, and outputting the M-channel signal to a processor;

The selector is configured to select one or more of the M channels according to the obtained selection control signal and send the signal to the decoder for logic decoding.

In conjunction with the first aspect, in a first possible implementation, the selection control signal is sent by the optical line terminal OLT to the signal processing device.

In conjunction with the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the selection control signal may be sent through physical layer operation management and maintenance PLOAM messages.

Combining the first aspect to any one of the second possible implementations of the first aspect In a third possible implementation manner, the shunt circuit includes a comparator or a digital to analog converter.

With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation, the multiplex unit is specifically configured to: obtain M thresholds, where The M thresholds include a first threshold, a second threshold, an ...th M threshold;

According to the M thresholds, the initial signals are compared with the M thresholds to obtain an M-channel signal output.

With reference to any implementation of the first aspect to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the control signal is generated by an optical line terminal OLT according to a bandwidth plan selected by a user. a control signal for selecting one or several of the M signals.

In a second aspect, a signal processing apparatus includes:

a processor, configured to determine, according to the determined N-th order amplitude modulation coding format, a set bandwidth of the first network node, and a bandwidth of the signal processing apparatus, a coding mode corresponding to the first network node; and according to the determined coding mode Generating a selection control signal of the first network node to indicate, by the first network node, which one or which of the amplitude-separated N-1 way signals are correctly decoded;

An encoder, configured to perform N-th order amplitude modulation coding on the data sent to the first network node by using the determined coding mode;

a transmitter, configured to send the generated selection control signal and the encoded data.

In combination with the second aspect, in a first possible implementation manner,

The first network node is a component of the optical network terminal ONT or a component of the optical network unit ONU.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner,

The device is a component of an optical line termination OLT.

With reference to the second aspect or any one of the possible implementation manners of the second aspect, in a third possible implementation manner,

The selection control signal manages and maintains PLOAM messaging through physical layer operations. In a third aspect, a signal processing method includes:

Obtaining an initial signal, where the initial signal is an electrical signal encoded by an N-th order amplitude modulation, and N is an integer greater than 2;

The initial signal is separated into M signals by amplitude, wherein M is an integer greater than 2; a control signal is acquired, and one or more of the M signals are selected for logical decoding according to the control signal.

In conjunction with the third aspect, in a first possible implementation of the third aspect, the selection control signal is transmitted by an optical line terminal OLT.

With reference to the third aspect and the first possible implementation manner of the second aspect, in the first possible implementation manner of the third aspect, the selection control signal may be sent by physical layer operation management and maintenance PLOAM message.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the separating the initial signal into an M-channel signal by using the amplitude includes:

Obtaining M thresholds, where the M thresholds include a first threshold, a second threshold, and an Mth threshold;

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the control signal is a control signal generated by an optical line terminal OLT according to a bandwidth plan selected by a user, and used to select one of the M road signals Or a few signals.

A fourth aspect, an optical network communication system, where the network system includes a transmitting device and a receiving device, including:

The transmitting device is configured to send an initial optical signal to the receiving device, where the initial optical signal passes through an N-th order amplitude modulated encoded optical signal, and N is an integer greater than 2; according to a bandwidth of the receiving device Generating a relationship between the bandwidth of the transmitting device, generating a selection control signal, transmitting the selection control signal to the receiving device, determining an encoding format, encoding and transmitting data to be sent to the receiving device according to the encoding format;

The receiving device is the signal processing device of the first aspect or any one of the possible implementation manners of the first aspect; Alternatively, the receiving device is the signal processing device according to any one of the possible implementations of the second aspect or the second aspect.

The signal processing apparatus provided by the embodiment of the present invention obtains an initial signal, divides the initial signal into M-path signals, acquires a control signal, and selects one or more of the M-channel signals for logic decoding according to the control signal. The media access control layer only needs to process the decoded signal of part of the signal in the initial signal, which saves bandwidth resources and reduces the power consumption of the data processing of the medium access control layer.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

1 is a schematic flowchart of a signal processing method according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a PAM4 shunt circuit according to an embodiment of the present invention;

3 is a schematic structural diagram of a receiving end device of a P A M 4 encoding format according to an embodiment of the present invention;

4 is a schematic diagram of a partial path and a selection process in a receiving end of a PAM4 encoding format according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a signal processing apparatus according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a network system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

An embodiment of the present invention provides a signal processing method, which is applied to a multi-level amplitude modulation communication system. Referring to FIG. 1, the method includes the following steps: Step 101: Acquire an initial signal.

The initial signal is an electrical signal encoded by an N-th order amplitude modulation, and N is an integer greater than 2.

Optionally, before acquiring the initial signal in step 101, the method further includes:

Determine the encoding method.

Further, the determining the encoding mode may be completed by a handshake process between the transmitting end and the receiving end. The handshake, that is, the communication parties use a dedicated control signal for status indication. This control signal is sent from both the transmitting end to the receiving end and the receiving end to the transmitting end. The handshake protocol is used to process data transmission across clock domains. Only the handshake signals (REQ (Request, Request Signal) and ACK (Acknowledge)) of the two parties need to be synchronized using the pulse detection method. In the specific implementation, it is assumed that REQ, ACK, and the data bus are in an invalid state at the time of initialization, and the transmitting end first puts data, such as the encoding mode used by both parties, into the bus, and then sends a valid REQ signal to the receiving end. The receiving end latches the data bus after detecting a valid REQ signal, and then sends back a valid ACK signal to indicate a read completion response. The transmitting device cancels the current REQ signal after detecting the valid ACK signal, and the receiving device also outputs the ACK signal after detecting the REQ t pin, and a normal handshake communication is completed. Thereafter, the sender can continue to start the next handshake communication, and so on.

In this way, the communication parties determine the coding mode through the handshake process.

For example, the communication parties can use the double binary (DB) coding method and the fourth-order pulse amplitude modulation coding (Pulse Amplitude) through the negotiation of the handshake process.

Modulation, PAM4), N-stage Pulse Amplitude Modulation (PAMN) and other coding methods. Where N is an integer greater than 2.

Take the PAM4 encoding method as an example. For example, if the binary sequence before encoding is "0101 10110010", then the data encoded by PAM4 is "1 12302", because PAM4 encoding is two of the binary sequences. The bit is used as one, for example, 00 corresponds to 0, 01 corresponds to 1, 10 corresponds to 2, and 11 corresponds to 3. Wherein, in the hardware circuit, the binary 0, 1 is represented by a pulse amplitude, a voltage value, etc., the low pulse or low voltage represents 0, and the high pulse or high voltage represents 1. Similarly, the PAM4 encoded 0123 also corresponds to different pulses or voltages, and the difference between the high and low of the pulse or the voltage is used to distinguish different values. The transmitting end sends the PAM4 encoded signal to the receiving end, and the receiving end receives the PAM4 encoded signal as the initial signal;

Optionally, in an optical network communication system, after the encoding end encodes the binary sequence, the transmitting end converts the encoded signal into an optical signal, and transmits the encoded signal to the receiving end, and after receiving the optical signal, the receiving end converts to An electrical signal that is the initial signal.

Step 102: Divide the initial signal into an M-channel signal.

Where M is an integer, M=N-1, and N is the order of the pulse amplitude modulation code used for the initial signal. For example, for the PAM4 signal, N is 4 and M is 3; for the PAM8 signal, N is 8 and M is

7.

Specifically, the M thresholds are received, where the M thresholds include a first threshold and a second threshold, an Mth threshold;

Further, according to step 101, the transmitting end and the receiving end establish the encoding mode of the PAM4 during the handshake process, and the receiving end has a PAM4 decoding circuit for the initial signal, uses a 3-way comparator, or a 3-bit analog-to-digital conversion. ADC. Taking a 3-way comparator as an example, the three comparators pass three thresholds, and at this time, M=3, the initial signal can be divided into three signals.

That is, when the PAM4 decoding circuit is used, the initial signal can be divided into three signals by three thresholds, as shown in Fig. 2. For example, the data sent by the transmitting end is 20G, and the data received by the receiving side is 10G. The implementation manner may be that only the output result of the second threshold in FIG. 2 is selected, and 10G data can be obtained. The reason is as follows: The result that is greater than the third threshold is 11, the result that is less than the first threshold is 00, the greater than the first threshold is less than the second threshold is 01, and the result that is greater than the second threshold is less than the third threshold is 10, when the second is used When the threshold is compared, the data can distinguish 11, 10 from 00, 01, that is, the result larger than the second threshold is 10 or 11, and the result smaller than the second threshold is 01 or 00. It can be seen that the first digit greater than the second threshold is 1 and the first digit less than the second threshold is 0, that is, the previous digit of the two bits of data can be obtained by a second threshold, each transmission The data is two bits, and getting the previous bit is equivalent to getting half of the data. That is, only the output of the comparator 2 shown in Fig. 3 is selected, that is, the first signal shown in Fig. 4.

Referring to FIG. 3 and FIG. 4, if the data sent by the transmitting end is 20G, one receiving terminal is connected. Receiving 10G, the second signal shown in FIG. 4 can also be selected, that is, the output result of the comparator 1 in FIG. 3 and the output result of the comparator 2 are XORed in the first logic gate, and then the result of the exclusive OR is used. The result of the comparator 3 is then XORed with the second logic gate.

For another example, if the data sent by the transmitting end is 20G and the receiving end receives 5G of data, there are multiple practices. In practice, 10G data can be obtained through the second threshold, and the following logic processing part introduces a D flip-flop, and the clock is selected as The 5G clock is like this. The result is that in 10G data, one data is separated by one data, and half of the 10G data is obtained, that is, 5G data. Another approach, which has a precondition, is that in our transmission system, after the data is encoded, it is required to ensure that the distribution of 0 and 1 is average, that is, 50% each. Similarly, after turning it into PAM4, the two two codes together, the probability of occurrence of 00, 01, 10, 11 is the same, each is 25%. As shown in Fig. 3, if the OLT (Optical Line Terminal) only receives the result of comparing the third threshold, the result represents that 11 and 10, 01, 00 are separated. As long as the OLT encodes 11 combinations to represent one data and non-11 combinations to represent another data, the received data is equivalent to distinguishing the combination, that is, 25% of the information is acquired, in this case, the receiving end. Receive 5G data.

Step 103: Acquire a selection control signal, and select one or more of the M channels to perform logic decoding according to the selection control signal to generate a decoding signal.

Wherein, the selection control signal is sent by the transmitting end to the receiving end.

The selection control signal is related to the bandwidth selected by the user (serving as the receiving end).

For example, suppose the carrier (sender) data transmission bandwidth is 100M, the user acts as the receiving end, and the operator (also can be regarded as the transmitting end) selects the 50M home bandwidth package, then according to the user's 50M bandwidth setting, the transmitting end The data required by the user is encoded into one-half of the code stream in advance, and the coding format is determined by the sender and the receiver. For example, the PAM4 code is used, and the receiving end transmits 100M data from the line according to the selection of the sender. Signal, select its own 50M data for decoding, that is, select the second threshold output result in the shunt circuit as shown in FIG. 2, or XOR the first threshold output result and the third threshold output result, and then The processing result is XORed with the second threshold output result.

The control signal may be sent through a handshake protocol packet sent by the sender and the receiver, and may also be managed by a physical layer operation management (Physical Layer Operation And Management, PLOAM) The message packet is carried in the extended field or reserved field in the packet.

The signal processing method provided by this embodiment divides the initial signal by acquiring an initial signal.

The M-channel signal selects one or more of the M-channel signals for logical decoding, so that the medium access control layer only needs to process the decoded signal of the partial signals in the initial signal, thereby saving bandwidth resources and reducing medium access control layer data. Processing power consumption.

Embodiment 2

Based on the embodiment corresponding to FIG. 1 above, an embodiment of the present invention provides a signal processing apparatus for performing the signal processing method described in the foregoing embodiment corresponding to FIG. 1. Referring to FIG. 5, the signal processing apparatus 501 is shown. A shunt circuit 5011 and a selector 5012 are included.

The shunt circuit 501 1 is configured to receive an initial signal, separate the initial signal into an M-channel signal, and output the M-channel signal to the selector. The initial signal is an electrical signal encoded by an N-th order amplitude modulation, and N is an integer greater than 2, M=N-1.

Specifically, the branching circuit 5011 is configured to acquire M thresholds, where the M thresholds include a first threshold, a second threshold, and an Mth threshold;

According to the M thresholds, the initial signals are compared with the M thresholds to obtain the M-channel signal output.

The selector 5012 is configured to receive the selection control signal, and select one or more of the M channel signals for logic decoding according to the selection control signal.

The signal processing device 501 can also include a receiver 5013 for acquiring an initial signal and transmitting the initial signal to the shunt circuit 5011. The signal processing device 501 can also include logic decoding circuitry (not shown in the figures) for logically decoding the signal selected by the selector 5012 to recover the original data, typically in the form of a media access control MAC chip. Other decoding modules or devices are also possible.

Alternatively, the selection control signal is transmitted from the optical line terminal OLT to the signal processing device 501. The selection control signal can be sent through the physical layer operation management and maintenance PLOAM message, and carried in the extended field or reserved field of the PLOAM message.

Optionally, the shunt circuit 5011 includes a comparator or a digital to analog converter.

Optionally, the signal processing device 501 further includes a processor, and the processor is configured to determine an encoding mode. Further, determining the encoding mode can be completed by the handshake process between the transmitting end and the receiving end. to make. The handshake, that is, the communication parties use a dedicated control signal for status indication. This control signal has both the transmitting end to the receiving end and the receiving end to the transmitting end. The handshake protocol is used to process data transmission across clock domains. It is only necessary to synchronize the handshake signals (REQ (Request, Request Signal) and ACK (Acknowledge)) of the two parties using the pulse detection method. In the specific implementation, it is assumed that REQ, ACK, and the data bus are in an invalid state at the time of initialization, and the transmitting end first puts data, such as the encoding mode used by both parties, into the bus, and then sends a valid REQ signal to the receiving end. The receiving end latches the data bus after detecting a valid REQ signal, and then sends back a valid ACK signal to indicate a read completion response. The transmitting device cancels the current REQ signal after detecting the valid ACK signal, and the receiving device also outputs the ACK signal after detecting the REQ revocation, and completes a normal handshake communication. Thereafter, the sender can continue to start the next handshake communication, and so on.

For example, the communication parties can use the Binary Binary (DB, ) coding method, the 4th order Pulse Amplitude Modulation (PAM4), and the nth order pulse amplitude modulation code (Pulse Amplitude Modulation, PAM). n) Equal encoding format. In addition, it is also necessary to determine which part of the encoded data transmitted by the transmitting end is occupied by the receiving end data.

Take the PAM4 encoding method as an example. For example, if the binary sequence before encoding is "0101 10110010", then the data encoded by PAM4 is "1 12302", because PAM4 encoding is two of the binary sequences. The bit is used as one, for example, 00 corresponds to 0, 01 corresponds to 1, 10 corresponds to 2, and 11 corresponds to 3. Among them, in the hardware circuit, binary 0, 1 is represented by pulse amplitude, voltage value, etc., low pulse or low voltage represents 0, high pulse or high voltage represents 1. Similarly, PAM4 encoded 0123 also corresponds to different pulses or voltages, and the difference between the high and low of the pulse or the voltage is used to distinguish different values.

Optionally, the transmitting end sends the PAM4 encoded signal to the receiving end, and the receiving end receives the PAM4 encoded signal as an initial signal;

Optionally, in an optical network communication system, after the transmitting end encodes the binary sequence, the transmitting end converts the encoded signal into an optical signal, and transmits the optical signal to the receiving end, and after receiving the optical signal, the receiving end receives the optical signal. The signal is converted into an electrical signal, which is the initial signal. Specifically, the shunt circuit 501 1 can be implemented by using a comparator, and can also be implemented by using an analog-to-digital converter. Taking a 3-way comparator as an example, the 3-way comparator can divide the initial signal into 4 signals by passing 3 thresholds.

That is, when the PAM4 decoding circuit is used, the initial signal can be divided into three signals by three thresholds, as shown in Fig. 2. For example, the data sent by the transmitting end is 50G, and the data received by the receiving side is 10G. The implementation manner may be that only the output result of the second threshold in FIG. 2 is selected, and 10G data can be obtained. The reason is as follows: The result greater than the third threshold is 1 1 , the result smaller than the first threshold is 00, the greater than the first threshold is less than the second threshold is 01, and the result greater than the second threshold is less than the third threshold is 10, when the first When the comparison results of the two thresholds, the data can distinguish 1 1 , 10 from 00, 01, that is, the result larger than the second threshold is 10 or 1 1 , and the result smaller than the second threshold is 01 or 00. It can be seen that the first digit greater than the second threshold is 1 and the first digit less than the second threshold is 0, that is, the previous digit of the two bits of data can be obtained by a second threshold, each transmission The data is two bits, and getting the previous bit is equivalent to getting half of the data.

For another example, if the data sent by the transmitting end is 50G, the receiving end receives 5G data, the 10th data can be obtained through the second threshold, and the following logic processing department introduces a D flip-flop, and the clock is selected as a 5G clock. The result is that in 10G data, one data is separated by one data, and half of the 10G data is obtained, that is, 5G data.

Specifically, selecting one or more of the M-channel signals for logical decoding is determined according to a bandwidth plan selected by the user.

For example, suppose the carrier (sender) data transmission bandwidth is 100M, the user acts as the receiving end, and the operator (also can be regarded as the transmitting end) selects the 50M home bandwidth package, then according to the user's 50M bandwidth setting, the transmitting end The data required by the user is encoded into one-half of the code stream in advance, and the coding format is determined by the sender and the receiver. For example, the PAM4 code is used, and the receiving end transmits 100M data from the line according to the selection of the sender. The signal, select its own 50M data for decoding, that is, select the second threshold output result in the shunt circuit as shown in FIG. 2. The 50M data may also be encoded into another signal, and XORed by the first threshold output result and the third threshold output result, and the XOR processing result and the second threshold output result are XORed.

Alternatively, the receiver 5013 may be a ROSA, and the shunt circuit 5011 may be a comparator. It can also be an analog to digital converter or a digital to analog converter. For example, for PAM4 encoding, the comparator can be three or a 3-bit analog to digital converter ADC. The logic decoding circuit can be an exclusive OR gate circuit or other hardware circuit. The processor can use a Field-Programmable Gate Array (FPGA), and can use an Application Specific Integrated Circuit (ASIC). Using a Central Processor Unit (CPU), you can also use a Digital Signal Processor (DSP), you can also use a Micro Controller Unit (MCU), or you can use a programmable Controller (Programmable Logic Device, PLD) or other integrated chip.

In the signal processing apparatus provided in this embodiment, the initial signal is obtained by the receiver, the branching circuit divides the initial signal into M-channel signals, and the selector selects one or more of the M-channel signals for logic decoding, so that the medium access control The layer only needs to process the decoded signal of part of the signal in the initial signal, which saves bandwidth resources and reduces the power consumption of the data processing of the medium access control layer.

The embodiment of the invention provides a signal processing device, which may be a module or a component of an optical line terminal OLT. The signal processing apparatus may include a processor, configured to determine, according to the determined N-th order amplitude modulation coding format, a set bandwidth of the first network node, and a bandwidth of the signal processing apparatus, an encoding mode corresponding to the first network node; The N-th order amplitude modulation coding format may be determined by negotiation with the receiving end, or may be set when the signal processing device is shipped from the factory, or may be manually set or remotely configured. The coding mode corresponding to the first network node includes an encoding format and which path or signals of the data of the first network node are encoded, for example, as mentioned in the previous example, the data processing device acts as a transmitting end, and the data transmission thereof The bandwidth is 100M, the user acts as the receiving end, and the operator (also can be regarded as the transmitting end) selects the 50M home bandwidth package. Then, according to the user's 50M bandwidth setting, the (sending end) signal processing device encodes the data required by the user. In one-half of the code stream, the encoding format is determined by the sender and the receiver, such as PAM4. This determines the encoding format. According to the determined coding format, the transmitting end generates a selection control signal, which is to inform the receiving end which data or signals are carried in the receiving end, and the receiving end can correctly decode the path or signals. Restore your own data. That is, the receiving end can correctly recover the data without decoding all the received signals. Specifically, taking a PAM4 system as an example, suppose an OLT is connected to four ONUs (Optical Network Units), and the OLT bandwidth is 50G. The ONU1 is connected. The 50G signal is received, the ONU2 receives the 10G signal, the ONU3 receives the other half of the 10G signal, and the ONU4 receives the 5G signal. Then ONU1 selects the results of the three thresholds and performs logical processing, which is fully decoded. The ONU2 can directly select the result of a single intermediate threshold, that is, the 10G signal, and the ONU3 receives the other half of the 10G signal. The result of the three thresholds needs to be selected and logically processed. For detailed processing of ONU2, ONU3 and ONU4, refer to the foregoing embodiment.

The signal processing device (transmitting end) further includes an encoder and a transmitter, wherein the encoder is configured to perform N-th order amplitude modulation encoding on the data transmitted to the transmitting end by using the determined encoding mode. Continuing the example of the previous paragraph, the OLT encoding can be such that an or bn is 0 or 1 data. Specifically, the encoded data for Onul is: a2, a3, a4, b3, b2, c3, b4, d3, c2, e3, c4, f3, d2, g3, d4, h3; the data of ONU2 is: a2, a4 , b2 , b4, c2, c4, d2, d4; Onu3 data: a3, b3, c3, d3, e3, f3, g3, h3; Onu4 data: a4, b4, c4, d4.

The transmitter is further configured to send the generated selection control signal and the encoded data. The signal processing device (transmitting end) may further include an electro-optical converter that converts the encoded data and the selection control signal into an optical signal for transmission through the transmitter. Since the OLT and the ONU/ONT form a PON network, in the downlink direction, the OLT acts as the transmitting end and the ONT/ONU acts as the receiving end. Therefore, the selection control signal can be carried in the PLOAM message transmitted between the two, or can be sent through the handshake protocol message of the sender and the receiver, or sent together with the data signal.

The signal processing apparatus provided in this embodiment encodes the data of the receiving end into a part of the encoded signal of the transmitting end, and sends a selection control signal to instruct the receiving end to decode the partial signal including the data of the receiving end, so that the receiving end only decodes part of the signal. That is, the correct decoding can be realized, the bandwidth resource is saved, the power consumption of the data processing of the medium access control layer is reduced, the bandwidth processing capability requirement of the receiving end device is also reduced, the cost can be reduced, and the system cost performance is improved.

Embodiment 3

Embodiments of the present invention provide a communication system. Referring to Figure 6, the communication system 601 includes a transmitting device 6011 and a receiving device 6012.

The transmitting device 6011 may be an Optical Line Terminal (OLT), or may be an Optical Network Unit (ONU) or an Optical Network Terminal (Optical). Network Terminal, ONT), may also be a transmitting end in other communication systems, such as a base station, a user terminal, a communication node, etc.;

Correspondingly, the receiving device 6012 may be an optical network unit (ONU) or an optical network terminal (ONT), or may be an optical line terminal (OLT), or may be in another communication system. The receiving end, such as a user terminal device, a base station, a communication node, and the like.

The transmitting device 601 1 is configured to send an initial optical signal to the receiving device 6012, where the initial optical signal passes through the N-th order amplitude modulation encoded optical signal, and N is an integer greater than 2; according to the bandwidth of the receiving device and the bandwidth of the transmitting device Generating a selection control signal, transmitting a selection control signal to the receiving device, determining an encoding format, and encoding and transmitting the data to be sent to the receiving device according to the encoding format;

The receiving device 6012 may be the signal processing device described in the embodiment corresponding to FIG. The communication system provided in this embodiment divides the initial signal into M channels by acquiring an initial signal, and selects one or more of the M channels to perform logic decoding, so that the medium access control layer only needs to process the initial signal. The decoded signal of part of the signal saves bandwidth resources and reduces the power consumption of the data processing of the medium access control layer.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

claims

1. A signal processing device, characterized in that it includes:

A splitter circuit, used to separate the acquired initial signal into N-1 signals according to amplitude, where the initial signal is an electrical signal that has been encoded by N-order amplitude modulation, and N is an integer greater than 2; a selector, used for According to the obtained selection control signal, select from the N-1 signals; and send the selected signal to the decoder for logical decoding.

2. The device according to claim 1, characterized in that the selection control signal comes from an optical line terminal OLT coupled to the signal processing device.

3. The device according to claim 2, characterized in that the selection control signal is transmitted through a physical layer operation management and maintenance PLO AM message.

4. The device according to claim 1, characterized in that the shunt circuit is a comparator or a digital-to-analog converter.

5. The device according to any one of claims 1 to 4, characterized in that the shunt circuit is specifically used to: select one signal from the M signals according to the obtained selection control signal, and The selected signal is sent to the decoder for logical decoding.

6. The device according to any one of claims 1 to 4, characterized in that the selector is specifically used to: select at least two signals from the M signals according to the obtained selection control signal, and select The selected at least two signals are logically processed; and the logically processed signals are sent to the decoder for logical decoding.

7. The device according to claim 6, characterized in that the logical processing is exclusive OR processing.

8. The device according to any one of claims 1 to 6, characterized in that the device is a component of an optical network terminal ONT or a component of an optical network unit ONU.

9. A signal processing device, characterized in that it includes:

A processor configured to determine the coding method corresponding to the first network node based on the determined N-order amplitude modulation coding format, the set bandwidth of the first network node, and the bandwidth of the signal processing device; and based on the determined coding method Generate a selection control signal of the first network node to instruct the first network node to select which one or which ones to correctly decode from the N-1 signals after amplitude separation; An encoder, configured to perform N-order amplitude modulation coding on the data sent to the first network node using the determined coding method;

A transmitter, configured to transmit the generated selection control signal and the encoded data.

10. The device according to claim 9, wherein the first network node is a component of an optical network terminal ONT or a component of an optical network unit ONU.

11. The device according to claim 9 or 10, characterized in that the device is a component of an optical line terminal OLT.

12. The device according to any one of claims 9-11, characterized in that the selection control signal is transmitted through a physical layer operation management and maintenance PLOAM message.