WO2022140891A1 - Bandwidth adjustment method and apparatus, and transmission device - Google Patents

Abstract

Embodiments of the present application relate to the field of communications, and disclose a bandwidth adjustment method and apparatus, and a transmission device. The present application mitigates the problems in the prior art of waste of transmission capacity and high bit cost of a transmission device due to the bandwidth of the transmission device being fixed. The specific solution is that: a first transmission device acquires a bandwidth margin corresponding to a first service; in the case that the bandwidth margin corresponding to the first service is greater than or equal to a first preset threshold, the first transmission device acquires first bandwidth configuration information corresponding to the first service; the first transmission device acquires, on the basis of the first bandwidth configuration information, second bandwidth configuration information corresponding to a second service, the bandwidth of the second service being greater than that of the first service; the first transmission device adjusts the bandwidth of the second service on the basis of the second bandwidth configuration information.

Description

A kind of bandwidth adjustment method, device and transmission equipment technical field

The embodiments of the present application relate to the field of communications, and in particular, to a bandwidth adjustment method, apparatus, and transmission device.

Background technique

With the development of virtual reality (VR), augmented reality (AR), and fifth-generation mobile communication technology (5th generation, 5G), the transmission bandwidth in hotspot areas is increasing exponentially, and the network is busy. There is a big difference between the bandwidth of the time period and the idle time period.

When the current transmission network is constructed, the transmission bandwidth is fixedly configured for a given link. In order to deal with the possible damage of the network during the perennial use (for example, aging of optical fibers, aging of transmission equipment and used devices, nonlinearity, etc.), a large engineering margin is generally reserved in actual deployment. However, these engineering margins are not exhausted during the life cycle of the equipment, thus causing waste of transmission capacity and high bit cost of the transmission equipment.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a bandwidth adjustment method, apparatus, and transmission device, which can dynamically adjust the service bandwidth and reduce the bit cost of the transmission device.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

A first aspect of the embodiments of the present application provides a bandwidth adjustment method, the method includes: a first transmission device obtains a bandwidth margin corresponding to a first service; when the bandwidth margin corresponding to the first service is greater than or equal to the first preset In the case of setting a threshold, the first transmission device obtains the first bandwidth configuration information corresponding to the first service; the first transmission device obtains the second bandwidth configuration information corresponding to the second service based on the first bandwidth configuration information; the The bandwidth of the second service is greater than the bandwidth of the first service; the first transmission device adjusts the bandwidth of the second service based on the second bandwidth configuration information. Based on this solution, when the bandwidth margin of the first service is large, the current bandwidth configuration information (the first bandwidth configuration information) can be obtained, and the new bandwidth configuration information (the second bandwidth configuration information) can be obtained based on the current bandwidth configuration information, And based on the new bandwidth configuration information, the service bandwidth is adjusted, so as to realize the dynamic adjustment of the service bandwidth and reduce the bit cost of the transmission equipment.

With reference to the first aspect, in a possible implementation manner, before the above-mentioned first transmission device adjusts the bandwidth of the second service based on the above-mentioned second bandwidth configuration information, the above-mentioned method further includes: the above-mentioned first transmission device transmits to the second transmission device Send the above-mentioned second bandwidth configuration information; the second bandwidth configuration information includes a bandwidth switching identifier. Based on this solution, the transmitting-side transmission device (first transmission device) can send new bandwidth configuration information (second bandwidth configuration information) to the receiving-side transmission device (second transmission device), so that the receiving-side transmission device can The bandwidth configuration information of the device correctly parses the services sent by the sender after the bandwidth is adjusted. Moreover, in this solution, the bandwidth switching identifier is carried in the second bandwidth configuration information, so that the receiving side can know when the transmitting side starts to adjust the service bandwidth, so that the receiving side can analyze the service after the bandwidth adjustment based on the second bandwidth configuration information. By analyzing, the service bandwidth can be adjusted without loss.

Combining the first aspect and the above possible implementation manner, in another possible implementation manner, after the above-mentioned first transmission device sends the second bandwidth configuration information to the above-mentioned second transmission device, there is a preset gap, and the first transmission device again Start to adjust the bandwidth of the second service. Based on this solution, after the sending side sends the second bandwidth configuration information carrying the bandwidth switching identifier to the receiving side, it can start to adjust the service bandwidth after a preset interval, so that the receiving side has enough processing time for the second bandwidth configuration information Perform parsing processing, and perform correct parsing processing on the bandwidth-adjusted service based on the second bandwidth configuration information to ensure that the service on the receiving side is lossless.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the foregoing bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format. Based on this solution, the second bandwidth configuration information may include the bandwidth of the second service, the FEC coding scheme corresponding to the second service, and the constellation modulation format corresponding to the second service, so that the transmission device on the sending side and the transmission device on the receiving side can be based on The second bandwidth configuration information adjusts the service bandwidth. It can be understood that when the first transmission device adjusts the service bandwidth based on the second bandwidth configuration information, the service bandwidth can be adjusted through the first-level bandwidth adaptation, or the service bandwidth can be adjusted through the two-level bandwidth adaptation.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the first transmission device includes a first bandwidth adjustment device, and the first transmission device adjusts the second bandwidth configuration information based on the second bandwidth configuration information. The bandwidth of the service includes: based on the second bandwidth configuration information, the first bandwidth adjustment device adjusts the bandwidth of the second service at the handover boundary of the data frame transmitting the second service. Based on this solution, the first bandwidth adjustment device adjusts the service bandwidth at the switching boundary of the data frame transmitting the second service, so that the service before the bandwidth change is not affected by the bandwidth change during the bandwidth adjustment process. The service is lossless, which improves the user experience.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the first bandwidth adjustment device includes a first controller and a first bandwidth adjustment circuit; the first bandwidth adjustment device is based on the second bandwidth configuration information, and adjusting the bandwidth of the second service includes: the first controller obtains the second bandwidth configuration information, and sends the second bandwidth configuration information to the first bandwidth adjustment circuit; the first bandwidth adjustment circuit is based on the second bandwidth configuration information, adjust the bandwidth of the second service at the switching boundary of the data frame for transmitting the second service. Based on this solution, the first controller obtains new bandwidth configuration information (second bandwidth configuration information), and the first bandwidth adjustment circuit can adjust the service bandwidth based on the second bandwidth configuration information, so as to realize dynamic adjustment of the service bandwidth and reduce transmission costs. The bit cost of the device. Moreover, in this solution, the service bandwidth adjustment is performed at the switching boundary of the data frame transmitting the second service, so that the service before the bandwidth change is not affected by the bandwidth change during the bandwidth adjustment process. user experience.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment circuit includes a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit; the above-mentioned first Based on the second bandwidth configuration information, the bandwidth adjustment device adjusts the bandwidth of the second service at the switching boundary of the data frame for transmitting the second service, including: a payload framing circuit receives the second service, and generates a payload frame based on the second service. ; The FEC coding circuit is based on the FEC coding scheme corresponding to the second service, and adjusts the overhead ratio in the FEC frame at the switching boundary of the FEC frame for transmitting the second service; The switching boundary of the FEC frame corresponds to the switching boundary of the payload frame; Constellation diagram The mapping circuit performs constellation mapping on the FEC frame after adjusting the overhead ratio at the switching boundary of the FEC frame based on the constellation modulation format corresponding to the second service. Based on this solution, the first bandwidth adjustment device can limit the switching boundary of the payload frame of the second service through the payload framing circuit, so that when the service bandwidth is adjusted by changing the overhead ratio in the FEC coding circuit, the payload The switching boundary of the FEC frame corresponding to the frame adjusts the service bandwidth to ensure that the service is lossless during the bandwidth adjustment process. It can be understood that, when the first bandwidth adjustment device in the embodiment of the present application adjusts the service bandwidth, the first-level service bandwidth adaptation can be performed by changing the overhead ratio, so as to realize the dynamic adjustment of the service bandwidth. Two-level service bandwidth adaptation can also be performed by changing the overhead ratio and the constellation modulation format to realize dynamic adjustment of service bandwidth. It can be understood that, when the first bandwidth adjustment device realizes the dynamic adjustment of the service bandwidth through the first-level service bandwidth adaptation, the modulation format of the constellation diagram before and after the adjustment of the service bandwidth is the same. When the first bandwidth adjustment device realizes the dynamic adjustment of the service bandwidth through two-level service bandwidth adaptation, the modulation formats of the constellation diagram before and after the adjustment of the service bandwidth are different.

Combining the first aspect and the above possible implementation manner, in another possible implementation manner, the constellation modulation format corresponding to the second service is different from the constellation modulation format corresponding to the first service. Based on this solution, the first bandwidth adjustment device realizes the dynamic adjustment of the service bandwidth by changing the overhead ratio and the constellation diagram modulation format.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment circuit further includes a coupled channel interleaving circuit and a first digital signal processor DSP; the above-mentioned first bandwidth adjustment device Based on the second bandwidth configuration information, at the switching boundary of the data frame for transmitting the second service, adjusting the bandwidth of the second service, further comprising: the channel interleaving circuit converting the symbols of different constellation modulation formats output by the constellation mapping circuit Overlap is performed; the first DSP processes the signal of the DSP frame at the switching boundary of the DSP frame transmitting the second service, and the switching boundary of the DSP frame corresponds to the switching boundary of the FEC frame. Based on this solution, the symbols of different constellation modulation formats can be overlapped by the channel interleaving circuit, which can break up the error codes and improve the reliability of data transmission; The signal is processed, which can realize the best adaptation of the modulation method and the optical fiber link.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the above method further includes: when the first bandwidth adjustment circuit starts to adjust the bandwidth of the second service, the first controller adjusts the bandwidth of the first bandwidth. The state of the adjustment device is set to a locked state; when the first bandwidth adjustment circuit finishes adjusting the bandwidth of the second service, the state of the first bandwidth adjustment device is set to an unlocked state. Based on this solution, each time the service bandwidth is adjusted, the first controller sets the state of the first bandwidth adjustment device to the locked state, and after the bandwidth adjustment is completed, the first controller sets the state of the first bandwidth adjustment device to the unlocked state , so that there is no conflict between multiple bandwidth adjustments, and only one bandwidth adjustment is performed each time.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the obtaining of the first bandwidth configuration information by the first transmission device includes: when the state of the first bandwidth adjustment device is an unlocked state, the above The first transmission device obtains the first bandwidth configuration information. Based on this solution, when the first transmission device determines that the bandwidth margin is large, it can further obtain the state of the first bandwidth adjustment device, and in the case that the state of the first bandwidth adjustment device is the unlocked state, obtain the current bandwidth configuration information, And obtain new bandwidth configuration information based on the current bandwidth configuration information, and adjust the service bandwidth based on the new bandwidth configuration information. When the state of the first bandwidth adjustment device is the locked state, the first transmission device determines that the last bandwidth adjustment has not been completed, and does not acquire the current bandwidth configuration information until the last bandwidth adjustment is completed, and the state of the bandwidth adjustment device is: Unlock state, then obtain the current bandwidth configuration information, and perform the next bandwidth adjustment.

Combining the first aspect and the above possible implementation manner, in another possible implementation manner, the above method further includes: the first transmission device obtains the bandwidth margin corresponding to the second service; When the information is less than or equal to the second preset threshold, the first transmission device obtains the second bandwidth configuration information; the first transmission device obtains the third bandwidth configuration information corresponding to the third service based on the second bandwidth configuration information; The bandwidth is smaller than the bandwidth of the second service; the first transmission device adjusts the bandwidth of the third service based on the third bandwidth configuration information. Based on this solution, if the bandwidth margin after adjusting the service bandwidth is low, the overhead of increasing the service bandwidth can be reduced, so that the bandwidth margin can be increased and the service can be transmitted normally. It can be understood that the bandwidth adjustment method provided by the present application can increase the service bandwidth when the bandwidth margin is large, maximize the transmission bandwidth, and reduce the bit cost of the transmission device. When the bandwidth margin is small, the service bandwidth can also be reduced to ensure that the service can be transmitted normally.

In a second aspect of the embodiments of the present application, a first transmission device is provided, and the first transmission device includes: a processor, a memory, and a first bandwidth adjustment device; the memory is used for storing one or more bandwidth configuration information; the processor, used to obtain the bandwidth margin corresponding to the first service; when the processor determines that the bandwidth margin corresponding to the first service is greater than or equal to the first preset threshold, the processor obtains the first bandwidth corresponding to the first service from the memory configuration information; the processor is further configured to obtain second bandwidth configuration information corresponding to the second service based on the first bandwidth configuration information; the bandwidth of the second service is greater than the bandwidth of the first service; the first bandwidth adjustment device is used for Based on the second bandwidth configuration information, the bandwidth of the second service is adjusted.

With reference to the second aspect, in a possible implementation manner, the first transmission device further includes: a transceiver; the transceiver is configured to send the second bandwidth configuration information obtained by the processor to the second transmission device; the above-mentioned The second bandwidth configuration information includes a bandwidth switching identifier.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, after the transceiver sends the second bandwidth configuration information to the second transmission device, the processor starts to adjust at a preset gap. The bandwidth of the second service.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the foregoing bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment device is specifically configured to, based on the above-mentioned second bandwidth configuration information, at the switching boundary of the data frame for transmitting the above-mentioned second service. , and adjust the bandwidth of the second service.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment device includes a first controller and a first bandwidth adjustment circuit; the first controller is used to obtain the above-mentioned first bandwidth adjustment circuit. 2 bandwidth configuration information, and send the second bandwidth configuration information to the first bandwidth adjustment circuit; the first bandwidth adjustment circuit is configured to transmit the data frame of the second service based on the second bandwidth configuration information at the switching boundary of the data frame of the second service , and adjust the bandwidth of the second service.

With reference to the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment circuit includes a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit; the payload The framing circuit is used to receive the second service and generate a payload frame based on the second service; the FEC coding circuit is used to transmit the FEC frame of the second service based on the FEC coding scheme corresponding to the second service. The switching boundary of the FEC frame is adjusted to adjust the overhead ratio in the FEC frame; the switching boundary of the FEC frame corresponds to the switching boundary of the payload frame; the constellation map mapping circuit is used based on the constellation map modulation format corresponding to the above-mentioned second service, in the FEC frame , and perform constellation mapping on the FEC frame after adjusting the overhead ratio.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the constellation modulation format corresponding to the second service is different from the constellation modulation format corresponding to the first service.

In combination with the second aspect and the above possible implementation, in another possible implementation, the first bandwidth adjustment circuit further includes a coupled channel interleaving circuit and a first digital signal processor DSP; the channel interleaving circuit is used for Overlapping symbols of different constellation modulation formats output by the above-mentioned constellation mapping circuit; the first DSP is used for processing the signal of the DSP frame at the switching boundary of the DSP frame for transmitting the above-mentioned second service, and the signal of the DSP frame is processed. The switching boundary corresponds to the switching boundary of the FEC frame described above.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first controller is further configured to: when the above-mentioned first bandwidth adjustment circuit starts to adjust the bandwidth of the above-mentioned second service, adjust the above-mentioned The state of the first bandwidth adjustment device is set to a locked state; when the first bandwidth adjustment circuit finishes adjusting the bandwidth of the second service, the state of the first bandwidth adjustment device is set to an unlocked state.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned processor is specifically configured to: when the state of the above-mentioned first bandwidth adjustment device is an unlocked state, the above-mentioned first transmission device Acquire the foregoing first bandwidth configuration information.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned processor is further configured to obtain the bandwidth margin corresponding to the above-mentioned second service; in the bandwidth margin information corresponding to the above-mentioned second service In the case of being less than or equal to the second preset threshold, obtain the second bandwidth configuration information from the memory; obtain third bandwidth configuration information corresponding to the third service based on the second bandwidth configuration information; the bandwidth of the third service is less than the bandwidth of the second service; the first bandwidth adjustment device is further configured to adjust the bandwidth of the third service based on the third bandwidth configuration information.

In a third aspect of the embodiments of the present application, a first bandwidth adjustment device is provided, the device includes: a first controller and a first bandwidth adjustment circuit, and the first controller and the first bandwidth adjustment circuit are coupled and connected; wherein , the first controller is configured to obtain the second bandwidth configuration information corresponding to the second service, and send the second bandwidth configuration information to the first bandwidth adjustment circuit; the first bandwidth adjustment circuit is configured to, based on the second bandwidth configuration information, The bandwidth of the second service is adjusted at the handover boundary for transmitting the data frame of the second service.

With reference to the third aspect, in a possible implementation manner, the foregoing bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.

With reference to the third aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first bandwidth adjustment circuit includes a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit; The frame circuit is used to receive the second service and generate a payload frame based on the second service; the FEC coding circuit is used to adjust the switching boundary of the FEC frame for transmitting the second service based on the FEC coding scheme corresponding to the second service. The overhead ratio of the FEC frame; the switching boundary of the FEC frame corresponds to the switching boundary of the payload frame; the constellation map mapping circuit is used to adjust the overhead based on the constellation map modulation format corresponding to the second service at the switching boundary of the FEC frame. Constellation mapping is performed on the scaled FEC frame.

In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the first bandwidth adjustment circuit further includes a coupled channel interleaving circuit and a first digital signal processor DSP; the channel interleaving circuit is used to The symbols of different constellation modulation formats output by the constellation mapping circuit are overlapped; the first DSP is used to process the signal of the DSP frame at the switching boundary of the DSP frame transmitting the second service, and the switching boundary of the DSP frame and the FEC The switching boundary of the frame corresponds.

In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned first controller is further configured to: when the above-mentioned first bandwidth adjustment circuit starts to adjust the bandwidth of the above-mentioned second service, the above-mentioned The state of the first bandwidth adjustment device is set to a locked state; when the first bandwidth adjustment circuit finishes adjusting the bandwidth of the second service, the state of the first bandwidth adjustment device is set to an unlocked state.

It can be understood that, for the description of the effects of the second aspect and the third aspect, reference may be made to various implementation manners in the first aspect, and details are not described herein again.

A fourth aspect of the embodiments of the present application provides a second bandwidth adjustment device, the device includes: a second controller and a second bandwidth adjustment circuit, and the second controller and the second bandwidth adjustment circuit are coupled and connected; wherein, The second controller is configured to acquire second bandwidth configuration information corresponding to the second service, generate first control information based on the second bandwidth configuration information, and send the first control information to the second bandwidth adjustment circuit; the second bandwidth adjustment The circuit is configured to parse the second service from the first transmission device based on the first control information. Based on this solution, the second controller parses the new bandwidth configuration information (second bandwidth configuration information), and generates corresponding first control information based on the new bandwidth configuration information, and the second bandwidth adjustment circuit is based on the first control information The service after bandwidth adjustment can be analyzed, and the service after bandwidth adjustment can be received without loss.

With reference to the fourth aspect, in a possible implementation manner, the foregoing bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format. Based on this solution, the bandwidth adjustment device on the receiving side can acquire the bandwidth of the second service after the bandwidth adjustment, the FEC coding scheme of the second service, and the constellation modulation format of the second service, and generate corresponding control information based on the second bandwidth configuration information , and analyzes the service after bandwidth adjustment to ensure that the service on the receiving side is lossless.

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned control information includes the bandwidth of the above-mentioned second service, the FEC decoding scheme corresponding to the above-mentioned second service, or the corresponding FEC decoding scheme of the above-mentioned second service. At least one of the constellation diagram modulation formats. Based on this solution, the bandwidth adjustment apparatus at the receiving side may obtain the bandwidth of the second service, the FEC decoding scheme corresponding to the second service, and the corresponding bandwidth of the second service based on the new bandwidth configuration information (second bandwidth configuration information) after adjusting the bandwidth. The constellation diagram modulation format and other control information, and based on the control information, the bandwidth-adjusted second service sent by the sending side is parsed.

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, the second bandwidth configuration information includes a bandwidth switching identifier; the second controller is further configured to switch based on the bandwidth identifier and the preset gap. , to generate a switching control signal. Based on this solution, the second service parsed by the receiving side can be aligned with the second service sent by the sending side, so that the receiving side can correctly parse and process the bandwidth-adjusted service sent by the sending side, ensuring that the service is lossless during bandwidth adjustment. .

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned second bandwidth adjustment circuit is specifically configured to, based on the above-mentioned switching control signal, at the switching boundary of the data frame for transmitting the above-mentioned second service, Analyze the above second service. Based on this solution, the bandwidth adjustment circuit on the sending side can start based on the switching control signal, and then start to adjust the service bandwidth after a preset interval, so that the receiving side has enough processing time to parse the second bandwidth configuration information sent by the sending side processing, and based on the second bandwidth configuration information, correct analysis processing is performed on the service after the bandwidth adjustment, so as to ensure that the service is lossless when the bandwidth adjustment is realized.

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned second bandwidth adjustment circuit includes a coupled constellation diagram mapping circuit, a forward error correction (FEC) decoding circuit, and a payload de-framing circuit. circuit; a constellation diagram mapping circuit for performing constellation diagram mapping on the DSP frame based on the constellation diagram modulation format corresponding to the above-mentioned second service, at the switching boundary of the digital signal processing DSP frame for transmitting the above-mentioned second service; the FEC decoding The circuit is used to decode the FEC frame at the switching boundary of the FEC frame for transmitting the second service based on the FEC decoding scheme corresponding to the second service, and remove the overhead in the FEC frame; the payload deframing circuit, It is used to analyze the payload frame at the switching boundary of the payload frame for transmitting the second service, and eliminate the overhead in the payload frame; the switching boundary of the payload frame corresponds to the switching boundary of the FEC frame and the switching boundary of the DSP frame. Based on this solution, the second bandwidth adjustment apparatus can analyze the bandwidth-adjusted service sent by the sending side through the FEC decoding circuit and the payload deframing circuit. It can be understood that if the first bandwidth adjustment device on the sending side adjusts the service bandwidth, only changing the overhead ratio is used to perform the first-level service bandwidth adaptation to realize dynamic adjustment of the service bandwidth, then the second bandwidth adjustment device on the receiving side is parsing. In the case of the second service, the first-level bandwidth adaptation is also used to parse the second service. If the first bandwidth adjustment device on the sending side adjusts the service bandwidth and uses two-level service bandwidth adaptation to dynamically adjust the service bandwidth, the second bandwidth adjustment device on the receiving side also uses the two-level bandwidth when parsing the second service. Adapt and parse the second service.

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, the above-mentioned second bandwidth adjustment circuit further includes a second DSP and a channel deinterleaving circuit that are coupled and connected, and the second DSP is used for transmitting the second bandwidth adjustment circuit. The DSP frames of the second service are processed; the channel deinterleaving circuit is used to deinterleave symbols of different constellation modulation formats. Based on this solution, the signal of the DSP frame can be processed by the second DSP at the switching boundary of the DSP frame, so that the algorithm function of the receiving side can be completed, and the symbols of different constellation modulation formats can be deinterleaved through the channel deinterleaving circuit.

A fifth aspect of the embodiments of the present application provides a transmission device, where the transmission device includes the first bandwidth adjustment device described in the third aspect, and the second bandwidth adjustment device described in the fourth aspect.

A sixth aspect of the embodiments of the present application provides a chip including an interface circuit, the first bandwidth adjustment device according to the third aspect, and the second bandwidth adjustment device according to the fourth aspect. to communicate with other devices.

A seventh aspect of the embodiments of the present application provides a first transmission device, where the first transmission device includes a memory for storing a computer program; and a processor for executing the computer program, so that the first transmission device realizes The bandwidth adjustment method according to any one of the above first aspects. Optionally, the first transmission device may further include a transceiver, and the transceiver is used for sending and receiving information, or for communicating with other network elements.

Description of drawings

FIG. 1 is a schematic flowchart of a bandwidth adjustment method provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a first bandwidth adjustment apparatus provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another first bandwidth adjustment apparatus provided by an embodiment of the present application;

4 is a schematic diagram corresponding to a switching boundary of an FEC frame and a switching boundary of a payload frame according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a bandwidth adjustment method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of another bandwidth adjustment manner provided by an embodiment of the present application;

7 is a schematic diagram corresponding to a switching boundary of a DSP frame, a switching boundary of an FEC frame, and a switching boundary of a payload frame provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of another bandwidth adjustment method provided by an embodiment of the present application;

FIG. 9 is an application schematic diagram of a bandwidth adjustment method provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a second bandwidth adjustment apparatus provided by an embodiment of the present application;

11 is a schematic structural diagram of another second bandwidth adjustment apparatus provided by an embodiment of the present application;

12 is a schematic flowchart of another bandwidth adjustment method provided by an embodiment of the present application;

FIG. 13 is a schematic flowchart of another bandwidth adjustment method provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b and c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items that have basically the same function and effect, Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order. For example, "first" in the first bandwidth configuration information and "second" in the second bandwidth configuration information in this embodiment of the present application are only used to distinguish different fault recovery requests. The descriptions of the first, second, etc. appearing in the embodiments of the present application are only used for illustration and distinguishing the description objects, and have no order. any limitations of the examples.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

With the rapid development of the network, the transmission bandwidth of hotspot areas has increased exponentially, and the bandwidth of the network in the busy time period and the idle time period is quite different. While continuously expanding capacity, operators require the network to have a certain degree of flexibility, so that the bandwidth requirements can be met to the greatest extent during the busy time period of the network, and long enough distance can be transmitted during the network idle time period.

However, when the current transmission network is constructed, the transmission bandwidth is generally fixedly configured for a given link. In order to deal with the possible damage of the network during the perennial use (for example, aging of optical fibers, aging of transmission equipment and used devices, nonlinearity, etc.), a large engineering margin is generally reserved in actual deployment. However, these engineering margins are not exhausted during the life cycle of equipment use, so these unused engineering margins cause waste of transmission capacity, resulting in higher bit cost of transmission equipment.

In order to improve the problem of waste of transmission capacity and high bit cost of transmission equipment due to the fixed bandwidth of transmission equipment in the prior art, the embodiment of the present application provides a bandwidth adjustment method, which can dynamically adjust the transmission bandwidth of a service , reducing the bit cost of transmission equipment.

FIG. 1 provides a bandwidth adjustment method according to an embodiment of the present application. As shown in FIG. 1 , the bandwidth adjustment method may include the following steps:

S101. The first transmission device acquires the bandwidth margin corresponding to the first service.

Optionally, the first transmission device may include a processor. The above step S101 may be performed by a processor in the first transmission device.

Exemplarily, the first service may be a service transmitted before bandwidth adjustment.

Optionally, obtaining the bandwidth margin corresponding to the first service by the first transmission device may include: the first transmission device receiving the bandwidth margin corresponding to the first service sent from the second transmission device. The first transmission device sends the first service to the second transmission device. After receiving the first service, the second transmission device can detect the bandwidth margin corresponding to the first service, and send the first service to the first transmission device. Bandwidth headroom. For example, the second transmission device may determine the bandwidth margin corresponding to the first service according to the actual error correction code rate, channel capacity, signal noise ratio (signal noise ratio, SNR) margin and other parameters.

S102. In the case that the bandwidth margin corresponding to the first service is greater than or equal to a first preset threshold, the first transmission device acquires first bandwidth configuration information corresponding to the first service.

It can be understood that the above step S102 may be performed by a processor in the first transmission device.

Optionally, the bandwidth configuration information may include at least one of a service bandwidth, a forward error correction (forward error correction, FEC) coding scheme, or a constellation modulation format. For example, the first bandwidth configuration information may include the bandwidth of the first service, the FEC coding scheme corresponding to the first service, and the constellation modulation format corresponding to the first service.

Optionally, the overhead ratios of the FEC frames corresponding to different FEC coding schemes may be different, that is, the service bandwidths transmitted in the FEC frames corresponding to different FEC coding schemes may be different.

Optionally, different constellation modulation formats have different compression ratios from the data domain (bit rate) to the symbol domain (baud rate). For example, 16 quadrature amplitude modulation (quadrature amplitude modulation, QAM) modulation format can combine 4 data bits into 1 symbol. For another example, the 8QAM modulation format can combine 3 data bits into 1 symbol. For another example, the Quadrature Phase Shift Keying (Quadrature Phase Shift Keying, QPSK) modulation format can combine 2 data bits into 1 symbol. The embodiments of the present application do not limit the types of constellation modulation formats corresponding to different services, and the constellation modulation formats corresponding to services of different bandwidths may be the same or different.

Optionally, when the bandwidth margin corresponding to the first service is relatively large, the first transmission device determines that the service bandwidth can be adjusted, and the first transmission device obtains the current bandwidth configuration information, which is the first bandwidth configuration information. Bandwidth configuration information.

S103. The first transmission device acquires second bandwidth configuration information corresponding to the second service based on the first bandwidth configuration information.

It can be understood that the above step S103 may be performed by a processor in the first transmission device.

The second bandwidth configuration information is bandwidth configuration information corresponding to a service after bandwidth adjustment (for example, a second service). The bandwidth of the second service is greater than the bandwidth of the first service, and the bandwidth of the second service is the adjusted bandwidth. Optionally, the second bandwidth configuration information may include a bandwidth switching identifier.

Optionally, when the service bandwidth is adjusted from the bandwidth of the first service to the bandwidth of the second service, the adjustment step precision may be preset. For example, taking the preset bandwidth adjustment step accuracy of 50 Gbps and the service bandwidth before bandwidth adjustment (for example, the bandwidth of the first service) as 100 Gbps, the service bandwidth (for example, the bandwidth of the second service) after the bandwidth adjustment can be is 150Gbps. This embodiment of the present application does not limit the step accuracy (or adjustment range) of the bandwidth for a single adjustment, and is only described here by taking the step accuracy of the bandwidth adjustment for a single time as 50 Gbps as an example. In practical applications, the magnitude of bandwidth adjustment can also be a higher or lower value.

Optionally, the first transmission device may obtain new bandwidth configuration information (ie, second bandwidth configuration information) by looking up a table or reconfiguring based on the first bandwidth configuration information. For example, the preset table stores bandwidth configuration information corresponding to different service bandwidths, and the first transmission device can obtain the second bandwidth configuration information by looking up the table. For another example, the first transmission device may also configure the second bandwidth configuration information corresponding to the second service based on the first bandwidth configuration information.

Optionally, the foregoing second bandwidth configuration information may include the bandwidth of the second service, the FEC coding scheme corresponding to the second service, and the constellation modulation format corresponding to the second service.

Exemplarily, the bandwidth adjustment method provided by the embodiment of the present application may adjust the service bandwidth through one-level bandwidth adaptation, and may also adjust the service bandwidth through two-level bandwidth adaptation. For example, the overhead ratio can be adjusted only by changing the FEC coding scheme, so as to realize the first-level adaptation of the service bandwidth. For another example, the overhead ratio can also be adjusted by changing the FEC coding scheme, and the compression ratio from the data domain to the symbol domain can be adjusted by changing the constellation modulation format, so as to jointly realize the two-level adaptation of the service bandwidth. It should be noted that, when adjusting the service bandwidth, the bandwidth of the symbol domain (or referred to as the air interface bandwidth) remains unchanged before and after the bandwidth adjustment, whether through one-level bandwidth adaptation or two-level bandwidth adaptation. That is to say, the baud rate of the transmission service is constant before and after the bandwidth adjustment.

Optionally, when the first-level bandwidth adaptation is used to adjust the service bandwidth, the FEC coding scheme corresponding to the second service is different from the FEC coding scheme corresponding to the first service, and the constellation modulation format corresponding to the second service is different from that corresponding to the first service. The constellation modulation format is the same. When two-level bandwidth adaptation is used to adjust the service bandwidth, the FEC coding scheme corresponding to the second service is different from the FEC coding scheme corresponding to the first service, and the constellation modulation format corresponding to the second service is different from the constellation modulation format corresponding to the first service. Also different.

S104. The first transmission device adjusts the bandwidth of the second service based on the second bandwidth configuration information.

Optionally, the first transmission device may further include a first bandwidth adjustment device, the above step S104 may be performed by the first bandwidth adjustment device, and the above step S104 may include: the first bandwidth adjustment device based on the second bandwidth configuration information, in The switching boundary of the data frame of the second service is transmitted, and the bandwidth of the second service is adjusted.

Exemplarily, the first bandwidth adjustment device may be a chip in a first transmission device, and the first transmission device may be a transmission device on the sending side. That is, the first bandwidth adjustment device may be a chip used to adjust the bandwidth in the transmission device on the sending side. As shown in FIG. 2 , the first bandwidth adjustment device 20 includes a first controller 21 and a first bandwidth adjustment circuit 22 , and the first controller 21 and the first bandwidth adjustment circuit 22 are coupled and connected.

The first controller 21 is configured to acquire the second bandwidth configuration information, and send the second bandwidth configuration information to the first bandwidth adjustment circuit 22 .

Optionally, the first controller 21 may receive the second bandwidth configuration information sent from the processor in the first transmission device.

The first bandwidth adjustment circuit 22 is configured to adjust the bandwidth of the second service at the switching boundary of the data frame transmitting the second service based on the second bandwidth configuration information.

Optionally, the foregoing second bandwidth configuration information may further include a table of actual service ports used by the new bandwidth. The above-mentioned first controller 21 may, based on the second bandwidth configuration information, instruct each functional module in the first bandwidth adjustment circuit 22 to sequentially complete the bandwidth switching operation according to the data processing sequence.

Optionally, the foregoing second bandwidth configuration information includes a bandwidth switching identifier. After acquiring the second bandwidth configuration information, the first controller 21 may generate a switching control signal after a preset gap based on the bandwidth switching identifier in the second bandwidth configuration information. After the first bandwidth adjustment circuit 22 receives the switching control signal from the first controller 21, it starts to adjust the bandwidth, so that the receiving side (the second transmission device) can have enough time to send the signal sent by the transmitting side (the first transmission device). The second bandwidth configuration information is parsed to ensure that the receiving side can correctly parse the second service after bandwidth adjustment sent by the transmitting side based on the new bandwidth configuration information (second bandwidth configuration information).

Optionally, as shown in FIG. 3 , the foregoing first bandwidth adjustment circuit 22 includes a payload framing circuit 221 , an FEC encoding circuit 222 , and a constellation map mapping circuit 223 . The payload framing circuit 221 , the FEC encoding circuit 222 , and the constellation map mapping circuit 223 are coupled and connected.

The payload framing circuit 221 is configured to receive the second service and generate a payload frame based on the second service.

Exemplarily, the payload framing circuit 221 may receive services from one or more service ports, and the multiple service ports are independent of each other, and the change in bandwidth may correspond to the change in the number of service ports. For example, as shown in FIG. 3, before the bandwidth adjustment, the payload framing circuit may receive the first service from the 1st service port to the y-1th service port. After the bandwidth is adjusted, the payload framing circuit can receive the second service from the first service port to the yth service port.

Optionally, the payload framing circuit takes the switching boundary of the payload frame as a unit, collects data of all service ports of each boundary, and inserts the payload overhead to complete the payload framing function. For example, taking the service bandwidth in the second bandwidth configuration information as 150Gbps as an example, the payload framing circuit receives the second service from the first service port to the yth service port, and inserts the second service in the 150Gbps second service. Payload overhead, generate payload frames. The boundary of the payload frame for transmitting the second service of 150 Gbps is the switching boundary in the process of bandwidth adjustment, and each subsequent module will be at the position corresponding to the boundary of the payload frame to transmit the bandwidth of the second service of 150 Gbps. The adjustment is performed to ensure that the services after the bandwidth adjustment and the services before the bandwidth adjustment are not mixed together, and the services are lossless during the bandwidth adjustment process.

The FEC encoding circuit 222 is configured to adjust the overhead ratio of the FEC frame at the switching boundary of the FEC frame for transmitting the second service based on the FEC encoding scheme corresponding to the second service.

The switching boundary of the FEC frame described above corresponds to the switching boundary of the payload frame. For example, as shown in Figure 4, the switching boundary of the payload frame can be composed of n payload frames, each payload frame is composed of the original payload and overhead (overhead, OH), and the switching boundary of the FEC frame can be composed of k number of It consists of FEC frames, and each FEC frame consists of FEC payload and FEC overhead. As shown in Figure 3, the data of n payload frames is evenly divided into k slices, and the length of each slice is the length of the FEC payload in the FEC frame, so k FEC frames correspond to the boundaries of n payload frames . That is, the switching boundary of the FEC frame corresponds to the switching boundary of the payload frame, so that when the service bandwidth is adjusted, the position where the bandwidth is adjusted by the FEC encoding circuit corresponds to the boundary of the payload frame generated by the payload framing circuit 221, so it can be ensured that The service after bandwidth adjustment and the service before bandwidth adjustment will not be mixed together, and the service is lossless in the process of bandwidth adjustment.

Optionally, as shown in FIG. 3 , the FEC encoding circuit 222 may include multiple FEC encoding units, and each FEC encoding unit corresponds to a certain processing bandwidth. The number of the FEC coding units is related to the maximum bandwidth of the service and the bandwidth processed by each FEC coding unit. For example, the number of FEC coding units = the maximum bandwidth of the service/the processing bandwidth of each FEC coding unit. The maximum bandwidth of this service is the total bandwidth of the actual service ports in the working state.

Exemplarily, the FEC encoding circuit 222 may perform the first-stage bandwidth adaptation by changing the overhead ratio at the switching boundary of the FEC frame. For example, when the service bandwidth increases, the overhead of the actual service bandwidth increase can be reduced by reducing the overhead ratio in the FEC frame. For another example, when the service bandwidth is reduced, the overhead of the actual service bandwidth reduction can be increased by increasing the overhead ratio in the FEC frame.

The constellation map mapping circuit 223 is configured to perform constellation map mapping on the FEC frame after adjusting the overhead ratio at the switching boundary of the FEC frame based on the constellation map modulation format corresponding to the second service.

Optionally, when adjusting the bandwidth of the second service, the first bandwidth adjustment circuit 22 in the embodiment of the present application may adjust the service bandwidth through one-stage bandwidth adaptation, or may adjust the service bandwidth through two-stage bandwidth adaptation. For example, the first bandwidth adjustment circuit 22 can adjust the overhead ratio only by changing the FEC encoding scheme through the FEC encoding circuit 222, and keep the constellation modulation format unchanged, so as to realize the first-level adaptation of the service bandwidth. For another example, the first bandwidth adjustment circuit 22 can also adjust the overhead ratio by changing the FEC coding scheme, and adjust the compression ratio from the data domain to the symbol domain by changing the constellation modulation format, so as to jointly realize the two-level adaptation of the service bandwidth.

Optionally, the first bandwidth adjustment circuit 22 may adjust the service bandwidth only by changing the overhead ratio through the FEC encoding circuit 222, so as to realize the first-level adaptation of the service bandwidth. The bandwidth of the symbol domain (or called air interface bandwidth) remains unchanged before and after the bandwidth adjustment.

For example, as shown in Figure 5, before bandwidth adjustment, the bandwidth of the first service is 100 Gbps, the FEC overhead 1 is 100 Gbps, and the constellation modulation format is QPSK modulation format. If the bandwidth margin for transmitting the first service is large, then By reducing the FEC overhead ratio, the service bandwidth can be increased by 50 Gbps, and the overhead can be reduced by 50 Gbps. As shown in FIG. 5 , after the bandwidth adjustment, the bandwidth of the second service is 150 Gbps, and the FEC overhead 2 is 50 Gbps. Before and after the bandwidth adjustment, the constellation modulation format of the first service and the constellation modulation format of the second service are both QPSK modulation formats, and the bandwidth of the symbol domain before and after the bandwidth adjustment remains unchanged, both being 100 Gbps. It can be understood that when the first-level bandwidth adaptation is used to adjust the service bandwidth, the modulation format of the constellation diagram is the same before and after the bandwidth adjustment. That is, when the first-level bandwidth adaptation adjusts the service bandwidth, only the overhead ratio of the FEC frame is changed, and the constellation modulation format is not changed.

Optionally, the first bandwidth adjustment circuit 22 can also change the FEC overhead ratio through the FEC coding circuit 222, and change the constellation modulation format through the constellation map mapping circuit 223, and adjust the compression ratio from the data domain to the symbol domain, so as to jointly realize the service bandwidth. Two-level adaptation. It should be noted that, during the two-stage bandwidth adaptation, the bandwidth of the symbol domain (or referred to as the air interface bandwidth) remains unchanged before and after the bandwidth adjustment.

For example, as shown in Figure 6, before the bandwidth adjustment, the bandwidth of the first service is 100 Gbps, the FEC overhead 1 is 100 Gbps, and the constellation modulation format is QPSK modulation format. If the bandwidth margin for transmitting the first service is large, then By increasing the service bandwidth and overhead in the FEC frame, and adjusting the constellation modulation format from the QPSK modulation format to the 8QAM modulation format, it is possible to ensure that the bandwidth of the symbol domain remains unchanged. That is, through the second-level bandwidth adaptation (changing the constellation modulation format), the bandwidth increased by the first-level bandwidth adaptation (increasing the service bandwidth and overhead in the FEC frame) can be compressed back to ensure the bandwidth of the symbol domain before and after the bandwidth adjustment. constant. As shown in Figure 6, the bandwidth of the second service is adjusted to 150Gbps through the first-level bandwidth adaptation, the FEC overhead 2 is adjusted to 150Gbps, and the constellation modulation format is adjusted from the QPSK modulation format to 8QAM modulation through the second-level bandwidth adaptation. Format, so that the bandwidth of the symbol domain before and after adjusting the bandwidth remains unchanged, both are 100Gbps. That is, when the secondary bandwidth is adapted, the service bandwidth can be changed by adjusting the FEC overhead ratio and the constellation modulation format, and the symbol domain bandwidth can be kept unchanged. It can be understood that when the two-stage bandwidth adaptation is used to adjust the service bandwidth, not only the overhead ratio of the FEC frame but also the constellation modulation format is changed before and after the bandwidth adjustment.

Optionally, as shown in FIG. 3 , the above-mentioned first bandwidth adjustment circuit may further include a channel interleaving circuit 224 and a first digital signal processor (digital signal processor, DSP) 225 . The channel interleaving circuit 224 and the first DSP 225 are coupled and connected.

The channel interleaving circuit 224 is used to overlap the symbols of different modulation formats output by the constellation map mapping circuit 223 . Optionally, the constellation map mapping circuit 223 can output multiple constellation map modulation formats, and the channel interleaving circuit 224 can output different constellation map modulation formats (for example, QPSK modulation format, 8QAM modulation format, 16QAM modulation format) output by the constellation map mapping circuit 223. ) symbols are overlapped, so as to achieve the purpose of dispersing bit errors.

The first DSP 225 is used to process the signal of the DSP frame at the switching boundary of the DSP frame for transmitting the second service. The first DSP 225 can match different modulation modes, adjust the parameters of the algorithm processing unit (signal power, shaping, etc.), so as to realize the optimal adaptation of the modulation mode and the optical fiber link. Since the channel interleaving circuit 224 overlaps the symbols of different modulation formats, the parameter matching needs to be processed according to the symbols, so the control logic can be precisely generated by the first DSP 225.

Optionally, the switching boundary of the DSP frame, the switching boundary of the FEC frame and the switching boundary of the payload frame correspond to each other. For example, as shown in Figure 7, the switching boundary of a payload frame may be composed of n payload frames, each of which is composed of the original payload and overhead, and the switching boundary of an FEC frame may be composed of k FEC frames, each of which is composed of k FEC frames. Each FEC frame consists of FEC payload and FEC overhead. The switching boundary of the DSP frame is composed of m DSP frames, and each DSP frame is composed of DSP payload and DSP overhead. As shown in FIG. 7 , the data of k FEC frames is evenly divided into m slices, and the length of each slice is the payload length required by the DSP frame, so the m DSP frames correspond to the boundaries of the k FEC frames. That is, the switching boundary of the DSP frame corresponds to the switching boundary of the FEC frame, so that when the service bandwidth is adjusted, the payload framing circuit 221, the FEC encoding circuit 222, the constellation map mapping circuit 223, the channel interleaving circuit in the first bandwidth adjustment circuit 22 224 and the first DSP 225 can perform bandwidth adjustment for the same service, so as to ensure that the service after the bandwidth adjustment and the service before the bandwidth adjustment will not be mixed together, so that the service is lossless during the bandwidth adjustment process.

Optionally, the first controller 21 is further configured to set the state of the first bandwidth adjustment device 20 to a locked state when the first bandwidth adjustment circuit 22 starts to adjust the bandwidth of the second service. After the first bandwidth adjustment circuit 22 has adjusted the bandwidth of the second service, the state of the first bandwidth adjustment device 20 is set to an unlocked state. Therefore, before the last bandwidth adjustment is not completed, the first bandwidth adjustment device cannot perform the next bandwidth adjustment because the first bandwidth adjustment device is in a locked state. The next bandwidth adjustment can be performed only when the first bandwidth adjustment device is in the unlocked state after the previous bandwidth adjustment is completed, which can further ensure that the service is not lossless during the bandwidth adjustment.

Optionally, before the first transmission device acquires the first bandwidth configuration information corresponding to the first service in the foregoing step S102, the first transmission device may also determine the state of the first bandwidth adjustment apparatus. In the case that the bandwidth margin corresponding to the first service is greater than or equal to the first preset threshold, if it is determined that the state of the first bandwidth adjustment device is an unlocked state, the first transmission device obtains the first bandwidth configuration information again. It can be understood that when the state of the first bandwidth adjustment device is in the locked state, it means that the first bandwidth adjustment device has not completed the last bandwidth adjustment, and then the first transmission device does not acquire the first bandwidth configuration information first. The first transmission device may continue to determine the state of the first bandwidth adjustment device, and the first transmission device will not obtain the first bandwidth configuration information and perform this bandwidth adjustment until the state of the first bandwidth adjustment device is the unlocked state.

It should be noted that, when adjusting the service bandwidth, the above-mentioned first bandwidth adjustment apparatus may increase the service bandwidth or reduce the service bandwidth. The above-mentioned FIG. 5 and FIG. 6 only take the increase of the service bandwidth as an example for illustration.

It can be understood that, in the bandwidth adjustment method provided by the embodiment of the present application, when the bandwidth margin of the first service is large, the current bandwidth configuration information (first bandwidth configuration information) can be obtained, and a new bandwidth configuration information can be obtained based on the current bandwidth configuration information. bandwidth configuration information (second bandwidth configuration information), and adjust the service bandwidth based on the new bandwidth configuration information, realize the dynamic adjustment of the service bandwidth, and reduce the bit cost of the transmission device. Moreover, when the bandwidth adjustment method of the embodiment of the present application is used to adjust the service bandwidth, the bandwidth adjustment is performed at the switching boundary of the data frame transmitting the second service, so it can be ensured that the service after the bandwidth adjustment and the service before the bandwidth adjustment will not be mixed together , the service is lossless in the process of bandwidth adjustment, which improves the user experience.

Optionally, an embodiment of the present application further provides a bandwidth adjustment method. As shown in FIG. 8 , the bandwidth adjustment method may further include the following steps in addition to the foregoing steps S101-S104:

S105. The first transmission device sends the second bandwidth configuration information to the second transmission device.

Optionally, the time when the first transmission device sends the second bandwidth configuration information to the second transmission device is earlier than the time when the first bandwidth adjustment apparatus starts to adjust the bandwidth of the second service. Exemplarily, after the first transmission device sends the second bandwidth configuration information to the second transmission device, at a preset interval, the first transmission device starts to adjust the bandwidth of the second service again.

For example, as shown in FIG. 9 , after the first transmission device sends the second bandwidth configuration information to the second transmission device, at a preset interval, the first transmission device starts to adjust the bandwidth of the second service again. That is to say, there is a period of time between when the sending-side device sends the second bandwidth configuration information to the receiving-side device and when the sending-side device actually performs bandwidth switching. This period of time allows the receiving-side device to have sufficient processing time. The second bandwidth configuration information is parsed, so as to ensure that the receiving side can correctly parse the second service after the bandwidth is adjusted by the transmitting side.

Optionally, the first transmission device may repeatedly send the second bandwidth configuration information to the second transmission device to ensure that the second transmission device can correctly receive the second bandwidth configuration information. It should be noted that, when the first transmission device repeatedly sends the second bandwidth configuration information to the second transmission device, only one piece of the second bandwidth configuration information carries the bandwidth switching identifier. That is to say, although the first transmission device may repeatedly send the second bandwidth configuration information to the second transmission device, the second bandwidth configuration information carrying the bandwidth switching identifier is only sent once.

It can be understood that when the first transmission device sends the second bandwidth configuration information to the second transmission device, the service bandwidth has not been adjusted. Therefore, the second transmission device can parse and obtain the first bandwidth configuration information based on the current bandwidth configuration information (the first bandwidth configuration information). The new bandwidth configuration information (second bandwidth configuration information) sent by the transmission device.

S106. The second transmission device receives the second bandwidth configuration information.

S107. The second transmission device parses the second bandwidth configuration information, and generates first control information.

Optionally, since the service bandwidth has not been adjusted when the first transmission device sends the second bandwidth configuration information, the second transmission device may parse the second bandwidth configuration information sent by the first transmission device based on the first bandwidth configuration information. , and based on the information obtained by the analysis, first control information corresponding to the second bandwidth configuration information is generated.

Optionally, the first control information includes at least one of the bandwidth of the second service, the FEC decoding scheme corresponding to the second service, or the constellation demodulation format corresponding to the second service. The first control information may further include a time slot control signal and a service port list corresponding to the second service.

For example, the second transmission device may parse the second bandwidth configuration information sent by the first transmission device based on the first bandwidth configuration information, and generate a constellation demodulation format corresponding to the second bandwidth configuration information based on the information obtained by the analysis , FEC decoding mode, service port list and other first control information.

S108. The first transmission device sends the second service to the second transmission device.

Optionally, the second service is a service after bandwidth adjustment by the first transmission device.

S109. The second transmission device receives the second service.

S110. The second transmission device parses the second service based on the first control information.

Optionally, the above-mentioned second transmission device may include a second bandwidth adjustment device, and the second bandwidth adjustment device may be a chip in the transmission device on the receiving side. As shown in FIG. 10 , the second bandwidth adjustment device 30 includes a second controller 31 and a second bandwidth adjustment circuit 32 , and the second controller 31 and the second bandwidth adjustment circuit 32 are coupled and connected.

The second controller 31 is configured to acquire second bandwidth configuration information, generate first control information based on the second bandwidth configuration information, and send the first control information to the second bandwidth adjustment circuit 32 .

The second bandwidth adjustment circuit 32 is configured to analyze the data frame for transmitting the second service based on the first control information, and obtain the second service.

Optionally, the obtaining of the second bandwidth configuration information by the second controller 31 may include that the second controller 31 receives the second bandwidth configuration information parsed from the second bandwidth adjustment circuit 32 . It can be understood that, for the specific process of parsing the second bandwidth configuration information by the second bandwidth adjustment circuit 32, reference may be made to the process of parsing the second service by the second bandwidth adjustment circuit 32 below. It should be noted that after the second bandwidth adjustment circuit 32 parses the second bandwidth configuration information based on the first bandwidth adjustment information, the second bandwidth adjustment circuit 32 may send the second bandwidth configuration information to the second controller 31, and the second controller 31 then generates first control information based on the second bandwidth configuration information, and sends the first control information to the second bandwidth adjustment circuit 32, so that the second bandwidth adjustment circuit 32 can analyze the second service based on the first control information.

Optionally, the foregoing second bandwidth configuration information includes a bandwidth switching identifier. After acquiring the second bandwidth configuration information, the second controller 31 may generate a switching control signal after a preset gap based on the bandwidth switching identifier in the second bandwidth configuration information, and send the switching control signal to the second bandwidth adjustment circuit 32 control signal. The second bandwidth adjustment circuit 32 may adjust the bandwidth of the second service at the switching boundary of the data frame transmitting the second service based on the switching control signal. Therefore, it is ensured that the bandwidth adjustment on the sending side and the bandwidth adjustment on the receiving side can be aligned, and the receiving side can parse and process the second bandwidth configuration information sent by the sending side during the preset interval, so that the receiving side can be based on the new bandwidth configuration information (No. (2) Bandwidth configuration information) to correctly parse the second service after the bandwidth adjustment on the sending side, to ensure that the service on the receiving side is lossless.

Optionally, if the second controller 31 detects that the second bandwidth configuration information is abnormal, or the second bandwidth configuration information violates a preset rule, it may generate alarm indication information and report it to the upper management unit through a software interface.

Optionally, as shown in FIG. 11 , the second bandwidth adjustment circuit 32 includes a payload deframing circuit 321 , an FEC decoding circuit 322 , a constellation graph mapping circuit 323 , a channel deinterleaving circuit 324 and a second DSP 325 .

The second DSP 325 is configured to process the DSP frame for transmitting the second service based on the first control information. The second DSP 325 can select algorithm parameters corresponding to the constellation modulation format based on the time slot control signal, and complete the algorithm function on the receiving side. The algorithm functions on the receiving side include: chromatic dispersion (CD) compensation, polarization mode dispersion (PMD) compensation, polarization state (state of polarization, SOP) tracking, carrier recovery, and the like. Optionally, because the channel interleaving circuit 224 on the transmitting side will overlap symbols of different modulation formats, which will cause different constellation modulation formats to appear in a DSP frame within a period of time, the time slot control signal can realize the symbol Class positioning to ensure optimal performance during bandwidth switching.

The channel deinterleaving circuit 324 is used for deinterleaving symbols of different modulation formats in the DSP frame. It can be understood that the channel deinterleaving circuit 324 is an inverse process of the channel interleaving circuit 224 in the first bandwidth adjustment device 20 on the transmitting side.

The constellation diagram mapping circuit 323 is configured to perform constellation diagram mapping on the DSP frame for transmitting the second service at the switching boundary of the DSP frame for transmitting the second service based on the constellation diagram modulation format corresponding to the second service. For example, the constellation diagram mapping circuit 323 can demodulate the signal according to the constellation diagram modulation format in the first control information sent by the second controller 31, recover the bit soft information from the symbol, and group the bit soft information, The number of packets is the same as the FEC decoding unit.

The FEC decoding circuit 322 is configured to, based on the FEC decoding scheme corresponding to the second service, decode the FEC frame at the switching boundary of the FEC frame for transmitting the second service, and eliminate the overhead in the FEC frame.

The FEC decoding circuit 322 may include a plurality of FEC decoding units. The configuration principle and quantity of the FEC decoding units in the FEC decoding circuit 322 are the same as the FEC encoding in the FEC encoding circuit 222 in the first bandwidth adjustment apparatus shown in FIG. 3 above. The configuration principle and quantity of units are the same. The FEC decoding circuit 322 can complete the decoding function according to the FEC decoding scheme in the first control information sent by the second controller 31, remove the FEC overhead, and output the payload bit information.

The payload deframing circuit 321 is configured to analyze the payload frame at the switching boundary of the payload frame for transmitting the second service based on the first control information sent by the second controller 31, and eliminate the overhead in the payload frame. The payload deframing circuit 321 can, at the switching boundary of the payload frame, distribute the second service information stripped of the overhead of the payload frame to the mapping relationship defined by the actual service port number list provided by the second controller 31, and distribute the service to the each service port.

Optionally, the switching boundary of the payload frame, the switching boundary of the FEC frame and the switching boundary of the DSP frame correspond to each other. For details, reference may be made to the schematic diagram shown in FIG. 7 . It can be understood that when the first bandwidth adjustment device adjusts the bandwidth, it adjusts the service bandwidth at the switching boundary of the data frame (for example, the payload frame, the FEC frame, and the DSP frame) for transmitting the second service, so the second When analyzing the second service, the bandwidth adjustment device can analyze the second service layer by layer at the switching boundary of the DSP frame, FEC frame and payload frame for transmitting the second service, so that the payload of the second service can be obtained by correct analysis. , to achieve lossless reception of services.

Optionally, in the foregoing step S107 , the second transmission device may analyze the second bandwidth configuration information sent by the first transmission device through the second bandwidth adjustment circuit 32 , and generate the first control information through the second controller 31 . For example, as shown in FIG. 10 , the second DSP 325 in the second bandwidth adjustment circuit 32 processes the DSP frame that transmits the second bandwidth configuration information, and the channel deinterleaving circuit 324 processes symbols of different modulation formats in the DSP frame. After deinterleaving, the constellation diagram mapping circuit 323 demodulates the signal to recover the bit soft information, and then decodes the FEC frame through the FEC decoding circuit 322 to remove the overhead in the FEC frame, and the payload deframing circuit 321 decodes the FEC frame. The payload frame is parsed, the overhead in the payload frame is eliminated, and finally the second bandwidth configuration information is obtained. The payload deframing circuit 321 may send the second bandwidth configuration information to the second controller 31, so that the second controller 31 may generate the first control information based on the second bandwidth configuration information. Further, the second controller 31 may send the first control information to the second bandwidth adjustment circuit 32, and the second bandwidth adjustment circuit 32 may adjust the bandwidth of the service (for example, the second bandwidth adjustment circuit 32) on the sending side based on the first control information. business) for analysis.

Optionally, the obtaining of the second bandwidth configuration information by the second controller 31 may include that the second controller 31 receives the second bandwidth configuration information from the payload deframing circuit 321 in the second bandwidth adjustment circuit 32 . That is to say, the payload deframing circuit 321 can parse the second bandwidth configuration information sent by the sending side.

It can be understood that, in the bandwidth adjustment method provided by the present application, there is a preset gap between the moment when the first transmission device sends the second bandwidth configuration information to the second transmission device and the actual bandwidth adjustment by the first transmission device. The second transmission device can parse the second bandwidth configuration information in the preset interval and generate corresponding first control information, so that the second transmission device can, based on the first control information, send the bandwidth-adjusted second bandwidth sent by the sending side to the second transmission device. The service is parsed to ensure that the service on the receiving side is not damaged. Moreover, in this solution, the service bandwidth is adjusted at the handover boundary, thereby ensuring that the service after the bandwidth adjustment and the service before the bandwidth adjustment will not be mixed together, and the service is lossless during the bandwidth adjustment process. The bandwidth adjustment method provided by the embodiment of the present application can maximize the transmission bandwidth, reduce the bit cost of the transmission device, and improve the user experience under the premise of ensuring that existing services are not interrupted.

The bandwidth adjustment method provided by the embodiment of the present application can obtain new bandwidth configuration information ( second bandwidth configuration information), and send the new bandwidth configuration information to the second transmission device, so that the receiving-side device can analyze the service bandwidth based on the new bandwidth configuration information, realize dynamic adjustment of service bandwidth, and reduce transmission equipment. bit cost.

Optionally, as shown in FIG. 12 , an embodiment of the present application further provides a bandwidth adjustment method. After the above steps S101-S110 (S101-S110 are not shown in FIG. 12 ), the method may further include the following steps:

S111. The first transmission device acquires the bandwidth margin corresponding to the second service.

S112: In the case that the bandwidth margin corresponding to the second service is less than or equal to the second preset threshold, the first transmission apparatus acquires the second bandwidth configuration information corresponding to the second service.

Optionally, when the bandwidth margin corresponding to the second service is small, service transmission may be affected, the first transmission device determines that the service bandwidth can be reduced, and the first transmission device obtains the second bandwidth configuration information. For example, due to reasons such as the aging of the optical fiber link, the bandwidth margin may be too small. To ensure reliable service transmission, the service bandwidth can be reduced.

Optionally, the second preset threshold may be smaller than the first preset threshold.

Optionally, before the first transmission device acquires the second bandwidth configuration information corresponding to the second service in the above step S112, it may further include that the first transmission device determines the state of the first bandwidth adjustment device, and the bandwidth margin corresponding to the second service is determined by the first transmission device. In the case of being less than or equal to the second preset threshold, if it is determined that the state of the first bandwidth adjustment device is an unlocked state, the first transmission device obtains the second bandwidth configuration information again. It can be understood that each time the first transmission device determines to perform bandwidth adjustment, it can first determine the state of the first bandwidth adjustment device. If the state of the first bandwidth adjustment device is the locked state, it means that the first bandwidth adjustment device has not completed the connection Once the bandwidth is adjusted, the first transmission device does not acquire the second bandwidth configuration information first. The first transmission device may continue to determine the state of the first bandwidth adjustment device, and the first transmission device will not obtain the second bandwidth configuration information to perform this bandwidth adjustment until the state of the first bandwidth adjustment device is the unlocked state.

S113. The first transmission device acquires third bandwidth configuration information corresponding to the third service based on the second bandwidth configuration information.

Wherein, the bandwidth of the third service is smaller than the bandwidth of the second service. Optionally, the third bandwidth configuration information includes a bandwidth switching identifier.

Optionally, when the service bandwidth is adjusted from the bandwidth of the second service to the bandwidth of the third service, the adjustment step precision may be preset.

Exemplarily, the bandwidth adjustment method provided in this embodiment may adjust the service bandwidth through one-stage bandwidth adaptation, or may adjust the service bandwidth through two-stage bandwidth adaptation. For example, the overhead ratio can be adjusted only by changing the FEC coding scheme, so as to realize the first-level adaptation of the service bandwidth. For another example, the overhead ratio can also be adjusted by changing the FEC coding scheme, and the compression ratio from the data domain to the symbol domain can be adjusted by changing the constellation modulation format, so as to jointly realize the two-level adaptation of the service bandwidth. It should be noted that, when adjusting the service bandwidth, the bandwidth of the symbol domain (or referred to as the air interface bandwidth) remains unchanged before and after the bandwidth adjustment, whether through one-level bandwidth adaptation or two-level bandwidth adaptation. That is to say, the baud rate of the transmission service is constant before and after the bandwidth adjustment.

Optionally, when the first-level bandwidth adaptation is used to adjust the service bandwidth, the FEC coding scheme corresponding to the third service is different from the FEC coding scheme corresponding to the second service, and the constellation modulation format corresponding to the third service is different from that corresponding to the second service. The constellation modulation format is the same. When two-level bandwidth adaptation is used to adjust the service bandwidth, the FEC coding scheme corresponding to the third service is different from the FEC coding scheme corresponding to the second service, and the constellation modulation format corresponding to the third service is different from the constellation modulation format corresponding to the second service. Also different.

It can be understood that, because the bandwidth of the third service is smaller than that of the second service, the FEC coding scheme corresponding to the third service can increase the overhead ratio in the FEC frame compared to the FEC coding scheme corresponding to the second service.

S114. The first transmission device adjusts the bandwidth of the third service based on the third bandwidth configuration information.

Optionally, the first bandwidth adjustment device in the first transmission device may adjust the bandwidth of the third service based on the third bandwidth configuration information. The first bandwidth adjustment device may be the first bandwidth adjustment device shown in FIG. 3 .

It can be understood that, for the specific implementation manner of the foregoing steps S111-S114, reference may be made to the foregoing steps S101-S104, which will not be repeated here.

The bandwidth adjustment method provided by the embodiment of the present application can maximize the transmission bandwidth and reduce the bit cost of the transmission device by increasing the service bandwidth when the service bandwidth margin is large. When the service bandwidth margin is small, the reliability of service transmission is ensured by reducing the service bandwidth. That is, the solutions of the embodiments of the present application can dynamically adjust the service bandwidth, make full use of the bit cost of the transmission equipment, and in the process of adjusting the service bandwidth, the service is lossless, which improves the user experience.

The embodiment of the present application further provides a bandwidth adjustment method. As shown in FIG. 13 , in addition to the above steps S111-S114, the following steps may also be included:

S115. The first transmission device sends third bandwidth configuration information to the second transmission device.

Optionally, the time when the first transmission device sends the third bandwidth configuration information to the second transmission device is earlier than the time when the first transmission device starts to adjust the bandwidth of the third service. Exemplarily, after the first transmission device sends the third bandwidth configuration information to the second transmission device, at a preset interval, the first transmission device starts to adjust the bandwidth of the third service again.

S116. The second transmission device receives the third bandwidth configuration information.

S117. The second transmission device parses the third bandwidth configuration information, and generates second control information.

S118. The first transmission device sends the third service to the second transmission device.

S119. The second transmission device receives the third service.

S120. The second transmission device parses the third service based on the second control information.

It can be understood that, for the specific implementation manner of the foregoing steps S115-S120, reference may be made to the foregoing steps S105-110, which will not be repeated here.

It should be noted that the difference between the bandwidth adjustment method shown in FIG. 13 and the bandwidth adjustment method shown in FIG. 8 is that the bandwidth adjustment method shown in FIG. Maximize transmission bandwidth and reduce the bit cost of transmission equipment. The bandwidth adjustment method shown in FIG. 13 is to reduce the service bandwidth when the service bandwidth margin is small, so as to ensure the reliability of service transmission. It can be understood that the method for increasing the service bandwidth by the above-mentioned first bandwidth adjustment apparatus corresponds to the method for reducing the service bandwidth. For example, the first bandwidth adjustment device may reduce the service bandwidth by increasing the overhead ratio in the FEC frame. For another example, the first bandwidth adjustment apparatus may reduce the service bandwidth by increasing the overhead ratio in the FEC frame and changing the constellation modulation format.

The bandwidth adjustment method provided by the embodiment of the present application can maximize the transmission bandwidth and reduce the bit cost of the transmission device by increasing the service bandwidth when the service bandwidth margin is large. When the service bandwidth margin is small, the reliability of service transmission is ensured by reducing the service bandwidth. That is, the solutions of the embodiments of the present application can dynamically adjust the service bandwidth, make full use of the bit cost of the transmission equipment, and in the process of adjusting the service bandwidth, the service is lossless, which improves the user experience.

The embodiment of the present application further provides a bandwidth adjustment apparatus, and the bandwidth adjustment apparatus may be the first bandwidth adjustment apparatus 20 shown in FIG. 2 or FIG. 3 .

An embodiment of the present application further provides a bandwidth adjustment apparatus, and the bandwidth adjustment apparatus may be the second bandwidth adjustment apparatus 30 shown in FIG. 10 or FIG. 11 .

An embodiment of the present application further provides a transmission device, which may include the first bandwidth adjustment apparatus 20 shown in FIG. 2 or FIG. 3 , and the second bandwidth adjustment apparatus 30 shown in FIG. 10 or FIG. 11 . Optionally, the transmission device can be used as both the transmission device on the sending side and the transmission device on the receiving side. When the transmission device is used as the transmission device on the sending side, the service bandwidth can be adjusted by the first bandwidth adjustment device 20 . When the transmission device is used as the transmission device on the receiving side, the second bandwidth adjustment device 30 can parse the bandwidth-adjusted service. Optionally, the transmission device may further include a processor.

An embodiment of the present application further provides a chip, which includes an interface circuit, a first bandwidth adjustment device 20 as shown in FIG. 2 or FIG. 3 , and a second bandwidth adjustment device 30 as shown in FIG. 10 or FIG. 11 . Interface circuits are used to communicate with other devices.

Embodiments of the present application further provide a transmission device, which may exist in the form of a chip, and the structure of the device includes a processor and an interface circuit, where the processor is used to communicate with other devices through the interface circuit, so that the device executes The bandwidth adjustment method in any of the above embodiments in FIG. 1 , FIG. 8 , FIG. 12 or FIG. 13 .

The steps of the methods or algorithms described in conjunction with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, Erasable Programmable Read-Only Memory (Erasable Programmable ROM, EPROM), electrically erasable programmable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Alternatively, the ASIC may be located in the core network interface device. Of course, the processor and the storage medium may also exist in the core network interface device as discrete components.

Those skilled in the art should appreciate that, in one or more of the above examples, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of the present invention shall be included within the protection scope of the present invention.

Claims (38)

1. A bandwidth adjustment method, characterized in that the method comprises:

   The first transmission device obtains the bandwidth margin corresponding to the first service;

   When the bandwidth margin corresponding to the first service is greater than or equal to a first preset threshold, the first transmission device acquires first bandwidth configuration information corresponding to the first service;

   The first transmission device obtains, based on the first bandwidth configuration information, second bandwidth configuration information corresponding to the second service; the bandwidth of the second service is greater than the bandwidth of the first service;

   The first transmission device adjusts the bandwidth of the second service based on the second bandwidth configuration information.
2. The bandwidth adjustment method according to claim 1, wherein before the first transmission device adjusts the bandwidth of the second service based on the second bandwidth configuration information, the method further comprises:

   The first transmission device sends the second bandwidth configuration information to the second transmission device; the second bandwidth configuration information includes a bandwidth switching identifier.
3. The bandwidth adjustment method according to claim 2, wherein after the first transmission device sends the second bandwidth configuration information to the second transmission device, there is a preset gap, and the first transmission device re-configures Start to adjust the bandwidth of the second service.
4. The bandwidth adjustment method according to any one of claims 1-3, wherein the bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.
5. The bandwidth adjustment method according to claim 4, wherein the first transmission device comprises a first bandwidth adjustment device, and the first transmission device adjusts the bandwidth of the second service based on the second bandwidth configuration information Bandwidth, including:

   The first bandwidth adjustment device adjusts the bandwidth of the second service at the handover boundary of the data frame transmitting the second service based on the second bandwidth configuration information.
6. The bandwidth adjustment method according to claim 5, wherein the first bandwidth adjustment device comprises a first controller and a first bandwidth adjustment circuit; and the first bandwidth adjustment device is based on the second bandwidth configuration information, Adjusting the bandwidth of the second service includes:

   The first controller acquires the second bandwidth configuration information, and sends the second bandwidth configuration information to the first bandwidth adjustment circuit;

   The first bandwidth adjustment circuit adjusts the bandwidth of the second service at the switching boundary of the data frame transmitting the second service based on the second bandwidth configuration information.
7. The bandwidth adjustment method according to claim 6, wherein the first bandwidth adjustment circuit comprises a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit; the first bandwidth adjustment device is based on The second bandwidth configuration information, adjusting the bandwidth of the second service at the handover boundary of the data frame for transmitting the second service, includes:

   the payload framing circuit receives the second traffic and generates a payload frame based on the second traffic;

   The FEC encoding circuit, based on the FEC encoding scheme corresponding to the second service, adjusts the overhead ratio in the FEC frame at the switching boundary of the FEC frame for transmitting the second service; the switching boundary of the FEC frame is the same as the switching boundary of the FEC frame. corresponding to the handover boundary of the payload frame;

   The constellation map mapping circuit performs constellation map mapping on the FEC frame after adjusting the overhead ratio at the switching boundary of the FEC frame based on the constellation map modulation format corresponding to the second service.
8. The bandwidth adjustment method according to claim 7, wherein the constellation modulation format corresponding to the second service is different from the constellation modulation format corresponding to the first service.
9. The bandwidth adjustment method according to claim 7 or 8, wherein the first bandwidth adjustment circuit further comprises a coupled channel interleaving circuit and a first digital signal processor DSP; the first bandwidth adjustment device is based on the The second bandwidth configuration information, adjusting the bandwidth of the second service at the handover boundary of the data frame for transmitting the second service, further comprising:

   The channel interleaving circuit overlaps symbols of different constellation modulation formats output by the constellation mapping circuit;

   The first DSP processes the signal of the DSP frame at the switching boundary of the DSP frame for transmitting the second service, and the switching boundary of the DSP frame corresponds to the switching boundary of the FEC frame.
10. The bandwidth adjustment method according to any one of claims 6-9, wherein the method further comprises:

    The first controller sets the state of the first bandwidth adjustment device to a locked state when the first bandwidth adjustment circuit starts to adjust the bandwidth of the second service; after the first bandwidth adjustment circuit completes the adjustment When the bandwidth of the second service is determined, the state of the first bandwidth adjustment device is set to an unlocked state.
11. The bandwidth adjustment method according to any one of claims 6-10, wherein the obtaining, by the first transmission device, the first bandwidth configuration information comprises:

    When the state of the first bandwidth adjustment apparatus is an unlocked state, the first transmission device acquires the first bandwidth configuration information.
12. The bandwidth adjustment method according to any one of claims 1-11, wherein the method further comprises:

    obtaining, by the first transmission device, a bandwidth margin corresponding to the second service;

    In the case that the bandwidth headroom information corresponding to the second service is less than or equal to a second preset threshold, the first transmission device acquires the second bandwidth configuration information;

    obtaining, by the first transmission device, third bandwidth configuration information corresponding to the third service based on the second bandwidth configuration information; the bandwidth of the third service is smaller than the bandwidth of the second service;

    The first transmission device adjusts the bandwidth of the third service based on the third bandwidth configuration information.
13. A first transmission device, characterized in that the first transmission device comprises: a processor, a memory, and a first bandwidth adjustment device; the memory is used to store one or more bandwidth configuration information;

    the processor, configured to obtain the bandwidth margin corresponding to the first service;

    If the processor determines that the bandwidth margin corresponding to the first service is greater than or equal to a first preset threshold, the processor acquires the first bandwidth configuration information corresponding to the first service from the memory ;

    The processor is further configured to acquire, based on the first bandwidth configuration information, second bandwidth configuration information corresponding to a second service; the bandwidth of the second service is greater than the bandwidth of the first service;

    The first bandwidth adjustment device is configured to adjust the bandwidth of the second service based on the second bandwidth configuration information.
14. The first transmission device according to claim 13, wherein the first transmission device further comprises: a transceiver;

    The transceiver is configured to send the second bandwidth configuration information acquired by the processor to a second transmission device; the second bandwidth configuration information includes a bandwidth switching identifier.
15. The first transmission device according to claim 14, wherein after the transceiver sends the second bandwidth configuration information to the second transmission device, at a preset interval, the processor starts to adjust the the bandwidth of the second service.
16. The first transmission device according to any one of claims 13-15, wherein the bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.
17. The first transmission device according to claim 16, wherein the first bandwidth adjustment means is specifically configured to, based on the second bandwidth configuration information, adjust at the switching boundary of the data frame for transmitting the second service. the bandwidth of the second service.
18. The first transmission device according to claim 17, wherein the first bandwidth adjustment device comprises a first controller and a first bandwidth adjustment circuit;

    the first controller, configured to acquire the second bandwidth configuration information, and send the second bandwidth configuration information to the first bandwidth adjustment circuit;

    The first bandwidth adjustment circuit is configured to, based on the second bandwidth configuration information, adjust the bandwidth of the second service at the switching boundary of the data frame transmitting the second service.
19. The first transmission device according to claim 18, wherein the first bandwidth adjustment circuit comprises a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit;

    the payload framing circuit, configured to receive the second service and generate a payload frame based on the second service;

    The FEC encoding circuit is configured to, based on the FEC encoding scheme corresponding to the second service, adjust the overhead ratio in the FEC frame at the switching boundary of the FEC frame for transmitting the second service; the switching of the FEC frame the boundary corresponds to the handover boundary of the payload frame;

    The constellation map mapping circuit is configured to perform constellation map mapping on the FEC frame after adjusting the overhead ratio at the switching boundary of the FEC frame based on the constellation map modulation format corresponding to the second service.
20. The first transmission device according to claim 19, wherein the constellation modulation format corresponding to the second service is different from the constellation modulation format corresponding to the first service.
21. The first transmission device according to claim 19 or 20, wherein the first bandwidth adjustment circuit further comprises a coupled channel interleaving circuit and a first digital signal processor DSP;

    the channel interleaving circuit, configured to overlap symbols of different constellation modulation formats output by the constellation mapping circuit;

    The first DSP is configured to process the signal of the DSP frame at the switching boundary of the DSP frame for transmitting the second service, where the switching boundary of the DSP frame corresponds to the switching boundary of the FEC frame.
22. The first transmission device according to any one of claims 18-21, wherein the first controller is further configured to:

    When the first bandwidth adjustment circuit starts to adjust the bandwidth of the second service, the state of the first bandwidth adjustment device is set to a locked state; after the first bandwidth adjustment circuit finishes adjusting the bandwidth of the second service When the bandwidth is limited, the state of the first bandwidth adjustment device is set to an unlocked state.
23. The first transmission device according to any one of claims 18-22, wherein the processor is specifically configured to:

    When the state of the first bandwidth adjustment apparatus is an unlocked state, the first transmission device acquires the first bandwidth configuration information.
24. The first transmission device according to any one of claims 13-23, characterized in that,

    The processor is further configured to acquire the bandwidth margin corresponding to the second service; in the case that the bandwidth margin information corresponding to the second service is less than or equal to a second preset threshold, acquire from the memory the second bandwidth configuration information; obtain third bandwidth configuration information corresponding to the third service based on the second bandwidth configuration information; the bandwidth of the third service is smaller than the bandwidth of the second service;

    The first bandwidth adjustment device is further configured to adjust the bandwidth of the third service based on the third bandwidth configuration information.
25. A first bandwidth adjustment device, characterized in that the device comprises: a first controller and a first bandwidth adjustment circuit, wherein the first controller and the first bandwidth adjustment circuit are coupled and connected; wherein,

    the first controller, configured to acquire second bandwidth configuration information corresponding to the second service, and send the second bandwidth configuration information to the first bandwidth adjustment circuit;

    The first bandwidth adjustment circuit is configured to, based on the second bandwidth configuration information, adjust the bandwidth of the second service at the switching boundary of the data frame transmitting the second service.
26. The first bandwidth adjustment apparatus according to claim 25, wherein the bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.
27. The first bandwidth adjustment device according to claim 26, wherein the first bandwidth adjustment circuit comprises a coupled payload framing circuit, an FEC encoding circuit, and a constellation map mapping circuit;

    the payload framing circuit, configured to receive the second service and generate a payload frame based on the second service;

    The FEC coding circuit is configured to, based on the FEC coding scheme corresponding to the second service, adjust the overhead ratio of the FEC frame at the switching boundary of the FEC frame for transmitting the second service; the switching boundary of the FEC frame corresponding to the handover boundary of the payload frame;

    The constellation map mapping circuit is configured to perform constellation map mapping on the FEC frame after adjusting the overhead ratio at the switching boundary of the FEC frame based on the constellation map modulation format corresponding to the second service.
28. The first bandwidth adjustment device according to claim 27, wherein the first bandwidth adjustment circuit further comprises a coupled channel interleaving circuit and a first digital signal processor DSP;

    the channel interleaving circuit, configured to overlap symbols of different constellation modulation formats output by the constellation mapping circuit;

    The first DSP is configured to process the signal of the DSP frame at the switching boundary of the DSP frame for transmitting the second service, where the switching boundary of the DSP frame corresponds to the switching boundary of the FEC frame.
29. The first bandwidth adjustment device according to any one of claims 25-28, wherein the first controller is further configured to:

    When the first bandwidth adjustment circuit starts to adjust the bandwidth of the second service, the state of the first bandwidth adjustment device is set to a locked state; after the first bandwidth adjustment circuit finishes adjusting the bandwidth of the second service When the bandwidth is limited, the state of the first bandwidth adjustment device is set to an unlocked state.
30. A second bandwidth adjustment device, characterized in that the device comprises: a second controller and a second bandwidth adjustment circuit, and the second controller and the second bandwidth adjustment circuit are coupled and connected; wherein,

    The second controller is configured to acquire second bandwidth configuration information corresponding to the second service, generate first control information based on the second bandwidth configuration information, and send the first control information to the second bandwidth adjustment circuit information;

    The second bandwidth adjustment circuit is configured to analyze the second service from the first transmission device based on the first control information.
31. The second bandwidth adjustment apparatus according to claim 30, wherein the bandwidth configuration information includes at least one of a service bandwidth, a forward error correction (FEC) coding scheme, or a constellation modulation format.
32. The apparatus for adjusting the second bandwidth according to claim 31, wherein the control information includes a bandwidth of the second service, an FEC decoding scheme corresponding to the second service, or an FEC decoding scheme corresponding to the second service. At least one of the constellation diagram modulation formats.
33. The second bandwidth adjustment apparatus according to any one of claims 30-32, wherein the second bandwidth configuration information includes a bandwidth switching identifier; and the second controller is further configured to switch based on the bandwidth The identification and the preset gap are used to generate the switching control signal.
34. The second bandwidth adjustment device according to claim 33, wherein the second bandwidth adjustment circuit is specifically configured to, based on the switching control signal, analyze the switching boundary of the data frame for transmitting the second service. the second service.
35. The second bandwidth adjustment device according to claim 32, wherein the second bandwidth adjustment circuit comprises a coupled constellation graph mapping circuit, an FEC decoding circuit, and a payload deframing circuit;

    The constellation diagram mapping circuit is configured to, based on the constellation diagram modulation format corresponding to the second service, perform constellation diagram mapping on the DSP frame at the switching boundary of the digital signal processing DSP frame for transmitting the second service;

    The FEC decoding circuit is configured to decode the FEC frame at the switching boundary of the FEC frame for transmitting the second service based on the FEC decoding scheme corresponding to the second service, and remove the FEC frame expenses in;

    The payload deframing circuit is configured to parse the payload frame at the switching boundary of the payload frame for transmitting the second service, and remove the overhead in the payload frame; The switching boundary corresponds to the switching boundary of the FEC frame and the switching boundary of the DSP frame.
36. The second bandwidth adjustment device according to claim 32, wherein the second bandwidth adjustment circuit further comprises a second DSP and a channel deinterleaving circuit that are coupled and connected,

    the second DSP, configured to process the DSP frame for transmitting the second service;

    The channel deinterleaving circuit is used for deinterleaving symbols of different constellation modulation formats.
37. A transmission device, characterized in that the transmission device comprises the first bandwidth adjustment device according to any one of claims 25-29, and the second bandwidth according to any one of claims 30-36 Adjust the device.
38. A chip, characterized in that the chip comprises an interface circuit, the first bandwidth adjustment device according to any one of claims 25-29, and the second bandwidth adjustment device according to any one of claims 30-36 A bandwidth adjustment device, the interface circuit is used to communicate with other devices.

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