CN109391370B

CN109391370B - Transmission rate adjusting method in optical transmission network and network equipment

Info

Publication number: CN109391370B
Application number: CN201811458331.4A
Authority: CN
Inventors: 王宇辰; 孙国新
Original assignee: Raisecom Technology Co Ltd
Current assignee: Raisecom Technology Co Ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2021-06-22
Anticipated expiration: 2038-11-30
Also published as: CN109391370A

Abstract

The application discloses a transmission rate adjusting method and network equipment in an optical transmission network, comprising the following steps: the network equipment receives a transmission rate adjustment instruction, wherein the transmission rate adjustment instruction is an instruction for adjusting the target time slot information of a high-order optical data unit occupied by a target optical data unit, and the target optical data unit is an optical data unit with a configurable rate; the network equipment determines target time slot occupation information according to the transmission rate adjustment instruction, and adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information; the network equipment sends the rate adjustment information of the optical channel corresponding to the target optical data unit to downstream equipment connected with the network equipment, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is used for instructing the downstream equipment to adjust the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information; therefore, the transmission rate of the whole optical channel in the optical transmission network is adjusted.

Description

Transmission rate adjusting method in optical transmission network and network equipment

Technical Field

The present invention relates to the field of optical communications technologies, and in particular, to a method for adjusting a transmission rate in an optical transport network and a network device.

Background

An Optical Transport Network (OTN) is a core technology of a next generation Transport Network, has an ultra-large Transport capacity, and is an infrastructure of an Optical interconnection Network.

Fig. 1 is a schematic diagram of a layered structure of an optical transport network. As shown, the Optical transport network includes an Optical Channel layer (OCh), an Optical Multiplex Section layer (OMS), and an Optical transport layer (OTS). Wherein, the optical channel layer is divided into three electric domain sublayers and an optical domain (namely, the optical channel) again, and three electric domain sublayers are respectively: an Optical Channel Payload Unit k (Optical Channel Payload Unit-k, OPUk), an Optical Data Unit k (Optical Data Unit-k, ODUk), and an Optical Transport Unit k (Optical Transport Unit-k, OTUk). Various service signals are mapped to the ODUk through the adaptation of the OPUk, the overhead corresponding to the ODUk is added into the ODUk, then the overhead corresponding to the OTUk is added into the OTUk, and finally the overhead is mapped to an optical channel and then the optical channel can be processed for transmission.

Wherein, the coefficient k in OTUk, ODUk and OPUk indicates that the supported transmission rates are different. Specifically, k 1 indicates that the transmission rate is 2.5Gbit/s, k 2 indicates that the transmission rate is 10Gbit/s, k 3 indicates that the transmission rate is 40Gbit/s, k 4 indicates that the transmission rate is 100Gbit/s, and k flex indicates that the transmission rate is of an arbitrary size. For example, the types of the optical data units include an ODU1, an ODU2, an ODU3, an ODU4, and an ODUflex, where the ODUflex represents an ODU with a configurable rate. Except for the ODUflex, other optical data units in the optical data unit have fixed transmission rates. Thus, for the diversified service types, especially for the packet service with variable traffic, there is a lot of resource waste in the optical data unit with fixed transmission rate, for example, the bandwidth span from ODU1(2.5Gbit/s) to ODU2(10Gbit/s) is large, and even if only 3Gbit/s traffic is transmitted, only ODU2 can be selected.

In the prior art, an ODUflex with a variable rate is usually adopted in packet services with a variable transmission flow, and the transmission rate of an all-optical channel is unified by increasing or decreasing the number of optical data units or manually adjusting the rate of the ODUflex on the channel one by one, or the rate of the ODUflex is adjusted by using a complex communication protocol. In addition, when the ODUflex is in use, the number of timeslots to be used needs to be configured in advance, and secondary configuration cannot be performed in the normal operation process. If the transmission rate needs to be increased or decreased, the service path of the whole optical channel needs to be manually removed, and service adaptation is performed again. If there are multiple devices in the optical channel, such as multiple relay devices, the transmission rate needs to be adjusted one by one. The above-described transmission rate adjustment method for the ODUflex is time-consuming and labor-consuming, and requires a worker to have a considerable knowledge reserve of equipment and an optical transport network. In the present line resource utilization, such transmission rate adjustment operation becomes more and more frequent and indispensable due to the active resource reallocation by the operator or the bandwidth change demand by the customer.

Therefore, in the face of services with variable transmission flow, a transmission rate adjustment scheme with convenient operation and economy is urgently needed.

Disclosure of Invention

The embodiment of the application provides a transmission rate adjusting method and network equipment in an optical transmission network, which are used for adjusting the transmission rate of an optical channel.

In a first aspect, a method for adjusting a transmission rate in an optical transport network is provided, including:

the network equipment receives a transmission rate adjustment instruction, wherein the transmission rate adjustment instruction is an instruction for adjusting target time slot information of a high-order optical data unit occupied by a target optical data unit, and the target optical data unit is an optical data unit with a configurable rate;

the network equipment determines target time slot occupation information according to the transmission rate adjustment instruction, and adjusts the transmission rate of an optical channel corresponding to the target optical data unit according to the target time slot occupation information;

and the network equipment sends the rate adjustment information of the optical channel corresponding to the target optical data unit to downstream equipment connected with the network equipment, wherein the rate adjustment information comprises a rate adjustment instruction and the target time slot occupation information, and the rate adjustment instruction is used for instructing the downstream equipment to adjust the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information.

Optionally, the sending, by the network device, rate adjustment information of an optical channel corresponding to the target optical data unit to the downstream device includes:

and the network equipment loads the rate adjustment indication in reserved bytes in an optical transport network standard frame and sends the reserved bytes to the downstream equipment through the optical transport network standard frame.

Optionally, the rate adjustment indication includes part or all of the following information:

a transmission rate adjustment direction indicator for indicating to increase or decrease the transmission rate;

a protection channel transmission rate adjustment identifier for indicating whether to adjust the transmission rate of the protection channel;

a transmission rate adjustment status flag for indicating whether to perform transmission rate adjustment;

and the head position identifier of the multiplexing structure identifier of the high-order optical channel payload unit is used for indicating the time slot position of the low-order optical data unit mapped to the high-order optical data unit.

Optionally, the target timeslot occupation information is used to indicate the number and the timeslot position of timeslots occupied by the target optical data unit in the adjusted high-order optical data unit.

Optionally, the adjusting, by the network device, the transmission rate of the optical channel corresponding to the target optical data unit according to the transmission rate adjustment instruction includes:

and the network equipment removes the optical channel corresponding to the target optical data unit according to the transmission rate adjusting instruction and reconstructs the optical channel corresponding to the target optical data unit according to the target time slot occupation information.

Optionally, after the network device sends the rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream device, the method further includes:

and the network equipment receives transmission rate adjustment result information sent by the downstream equipment, wherein the transmission rate adjustment result information is used for indicating whether the downstream equipment completes the adjustment of the transmission rate of the optical channel.

Optionally, the optical channel is a working channel;

after the network device receives the transmission rate adjustment result information sent by the downstream device and used for indicating that the optical channel transmission rate adjustment is completed, the method further includes:

the network equipment adjusts the transmission rate of the protection channel corresponding to the target optical data unit according to the transmission rate adjusting instruction;

and the network equipment sends the rate adjustment information of the protection channel corresponding to the target optical data unit to the downstream equipment, wherein the rate adjustment information of the protection channel comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is used for instructing the downstream equipment to perform transmission rate adjustment on the protection channel corresponding to the target optical data unit according to the target time slot occupation information.

Optionally, the transmission rate adjustment instruction carries the following or all information:

indication information of a target optical data unit, the indication information of the target optical data unit comprising a type and/or a port number of the target optical data unit;

a transmission rate adjustment parameter, wherein the transmission rate adjustment parameter comprises transmission rate adjustment direction indication information and/or transmission rate variation;

and transmitting rate adjustment mode indication information, where the transmission rate adjustment mode indication information is used to indicate a specific adjustment mode in which the target optical data unit occupies the timeslot information of the high-order optical data unit.

In a second aspect, comprising:

the method comprises the steps that network equipment receives rate adjustment information of an optical channel corresponding to a target optical data unit sent by upstream equipment connected with the network equipment, wherein the rate adjustment information comprises rate adjustment instructions and target time slot occupation information, and the rate adjustment instructions are used for instructing the network equipment to adjust the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information;

and the network equipment adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information.

Optionally, if the network device is further connected to a downstream device, the method further includes:

and the network equipment sends the rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream equipment, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information.

Optionally, after the network device adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information, the method further includes:

and the network equipment sends transmission rate adjustment result information to the upstream equipment, wherein the transmission rate adjustment result information is used for indicating whether the network equipment completes the adjustment of the transmission rate of the optical channel.

Optionally, the receiving, by the network device, rate adjustment information of an optical channel corresponding to the target optical data unit sent by the upstream device includes:

and the network equipment receives an optical transmission network standard frame sent by the upstream equipment, wherein the reserved bytes in the optical transmission network standard frame carry the rate adjustment indication.

Optionally, the target timeslot occupation information is used to indicate a timeslot number and timeslot position occupied by the target optical data unit in the adjusted high-order optical data unit.

Optionally, the adjusting, by the network device, the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information includes:

and the network equipment removes the optical channel corresponding to the target optical data unit according to the rate adjustment indication, and reconstructs the optical channel corresponding to the target optical data unit according to the target time slot occupation information carried by the rate adjustment information.

In a third aspect, comprising:

a receiving unit, configured to receive a transmission rate adjustment instruction, where the transmission rate adjustment instruction is an instruction for adjusting target time slot information of a high-order optical data unit occupied by a target optical data unit, and the target optical data unit is an optical data unit with a configurable rate;

an adjusting unit, configured to determine target time slot occupation information according to the transmission rate adjustment instruction, and adjust a transmission rate of an optical channel corresponding to the target optical data unit according to the target time slot occupation information;

a sending unit, configured to send rate adjustment information of an optical channel corresponding to the target optical data unit to a downstream device connected to a network device, where the rate adjustment information includes a rate adjustment instruction and the target timeslot occupation information, and the rate adjustment instruction is used to instruct the downstream device to perform transmission rate adjustment on the optical channel corresponding to the target optical data unit according to the target timeslot occupation information.

Optionally, the sending unit is specifically configured to:

and carrying the rate adjustment indication in reserved bytes in an optical transport network standard frame, and sending the optical transport network standard frame to the downstream equipment.

Optionally, the rate adjustment information includes part or all of the following information:

Optionally, the optical channel is a working channel;

the adjusting unit is further configured to:

adjusting the transmission rate of the protection channel corresponding to the target optical data unit according to the transmission rate adjustment instruction;

the sending unit is further configured to:

and sending rate adjustment information of the protection channel corresponding to the target optical data unit to the downstream device, where the rate adjustment information of the protection channel includes a rate adjustment instruction and target time slot occupation information, and the target rate adjustment instruction is used to instruct the downstream device to perform transmission rate adjustment on the protection channel corresponding to the target optical data unit according to the target time slot occupation information.

In a fourth aspect, comprising:

a receiving unit, configured to receive rate adjustment information of an optical channel corresponding to a target optical data unit, where the rate adjustment information includes a rate adjustment instruction and target timeslot occupation information, and the rate adjustment instruction is used to instruct the network device to perform transmission rate adjustment on the optical channel corresponding to the target optical data unit according to the target timeslot occupation information;

and the adjusting unit is used for adjusting the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjusting information.

Optionally, the network device further includes a sending unit;

the sending unit is specifically configured to:

and sending rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream device, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information.

Optionally, the sending unit is further configured to:

and sending transmission rate adjustment result information to the upstream device, wherein the transmission rate adjustment result information is used for indicating whether the network device completes the adjustment of the transmission rate of the optical channel.

Optionally, the receiving unit is specifically configured to:

and receiving an optical transport network standard frame sent by the upstream equipment, wherein reserved bytes in the optical transport network standard frame carry the rate adjustment indication.

A fifth aspect, comprising: a processor, a memory, and a communication interface;

the memory to store computer instructions;

the processor configured to execute the computer instructions to implement the method according to any one of the first aspect.

In a sixth aspect, comprising: a processor, a memory, and a communication interface;

the memory to store computer instructions;

the processor configured to execute the computer instructions to implement the method according to any one of the second aspect.

Seventh aspect, the storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1 to 9.

In an eighth aspect, the storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 10 to 18.

In the above example of the present application, the first device adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the received transmission rate adjustment instruction, and after the rate adjustment is completed, sends the rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream second device; wherein the rate adjustment in the rate adjustment information indicates reserved bytes carried in the otn standard frame. And after the rate adjustment information is received, the second equipment adjusts the transmission rate of the optical channel corresponding to the target optical data unit, and after the rate adjustment is finished, the second equipment sends transmission rate adjustment result information to the first equipment, so that the rate adjustment of the optical channel in the whole optical transport network is realized.

Drawings

Fig. 1 is a schematic diagram of a layered structure of an optical transport network;

fig. 2 is a schematic structural diagram of an optical transport network standard frame in an embodiment of the present application;

FIG. 3 is a schematic representation of the MSI structure of OPU2 in an embodiment of the present application;

fig. 4 is a flowchart of a method for adjusting a transmission rate in an optical transport network according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a bit distribution corresponding to a rate adjustment indicator according to an embodiment of the present application;

fig. 6 is a flowchart illustrating transmission rate adjustment in an optical transport network according to an embodiment of the present application;

fig. 7 and fig. 8 are schematic structural diagrams of network devices according to an embodiment of the present application;

fig. 9 and 10 are schematic structural diagrams of a communication device according to an embodiment of the present application.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) The terms "low order" and "high order" in the embodiments of the present application refer to the multiplexing relationship between optical data units; for example, 4 ODUs 1 can be multiplexed to one ODU2, the ODU2 is a high-order ODU2 and the ODU1 is a low-order ODU 1; for another example, 4 ODUs 2 can be multiplexed to one ODU3, so that the ODU3 is higher-order and the ODU2 is lower-order compared with the ODU 2.

(2) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

(3) "network device" refers to a terminal device (e.g., a first device, a second device described below) in an optical transport network or a relay device in the optical transport network, and the network device locally knows an adaptation situation of a service to its lower-order optical data unit and an adaptation situation of its lower-order optical data unit to a higher-order optical data unit.

The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present application, are given by way of illustration and explanation only, and are not intended to limit the present application.

Referring to fig. 2, a schematic diagram of a structure of an optical transport network standard frame applicable to the embodiment of the present application is shown, in which a partial frame structure related to the embodiment of the present application is exemplarily listed. As shown in the figure, the standard frame of the Optical Transport network includes a frame alignment Overhead, an Optical Transport Unit k Overhead (OTUk OH), an Optical Data Unit k Overhead (ODUk OH), and an Optical Channel Payload Unit k Overhead (OPUk OH). OTUk OH provides network management functions at the optical channel transport unit level, ODUk OH provides maintenance and operation functions for the optical channel, and OPUk OH provides functions for the adaptation of the customer signal.

Taking the relationship among the optical data unit, the optical channel payload unit, and the optical transmission unit, as an example, an optical data unit ODUflex and a packet service, the packet service is encapsulated by a Frame-Mapped Generic Framing Procedure (GFP-F) based on Frame mapping, and then Mapped to the ODUflex, and then the ODUflex is Mapped to a higher order oduk.m by a Generic Framing Procedure (GMP), the higher order oduk.m is multiplexed to a higher order OPUk, the OPUk adds a corresponding overhead and encapsulates the higher order ODUk into the higher order ODUk, and finally, the optical data unit ODUflex and the packet service are carried and transmitted by the higher order OTUk.

The coefficient k represents ODU, OPU and OTU with different transmission rates, and k is more than or equal to 2 and less than or equal to 4. M represents that the ODUflex occupies M Time Slots (TS) in the high-order ODUk, each Time Slot is 1.25Gbit/s, for example, if the transmission rate of OPU2 is 10Gbit/s, M is more than or equal to 1 and less than or equal to 8, and if the transmission rate of OPU4 is 100Gbit/s, M is more than or equal to 1 and less than or equal to 80; for example, the ODUflex occupies 3 timeslots in the ODU2, and at this time, may carry a packet service of 3.75Gbit/s, and if the ODUflex occupies 5 timeslots in the ODU2 through transmission rate adjustment, may carry a packet service of 6.25Gbit/s at this time, that is, adjustment of the optical channel transmission rate is equivalent to adjustment of the number of timeslots occupied by the ODUflex in the higher-order ODUk.

As shown in table 1, the rate tunable range of the ODUflex and the corresponding high-order ODUk are that, when the ODUflex is multiplexed to the high-order ODU2, 1-8 timeslots are tunable, where the ODU2 may be multiplexed to the ODU3, or multiplexed to the ODU3 and then multiplexed to the ODU 4; when the ODUflex is multiplexed to a high-order ODU3, 1-32 time slots are adjustable, wherein an ODU3 can be multiplexed to an ODU 4; when the ODUflex is multiplexed to a high-order ODU4, 1-80 time slots are adjustable.

Table 1: rate adjustable range of ODUflex and corresponding higher-order ODUk

Rate adjustable range	Higher order ODUk	High order path
			1～8	ODU2	ODU2(->ODU3)->ODU4
1～8	ODU2	ODU2->ODU3
			1～8	ODU2	ODU2
1～32	ODU3	ODU3->ODU4
			1～32	ODU3	ODU3
1～80	ODU4	ODU4

When performing rate adjustment on the ODUflex, it is necessary to know the timeslot occupation information of the current higher-order ODUk. The timeslot occupation information of the current higher-order ODUk may be obtained by reading a Multiplexing Structure Identifier (MSI) value in a Payload Structure Identifier (PSI) of the higher-order OPUk. As shown in fig. 2, the PSI is located in the fourth row and the fifteenth column of the high-order OPUk overhead in the standard frame of the optical transport network, and has a size of 256 bytes for storing and transporting payload structure identification information. The OPUs with different transmission rates carry different MSI values, for example, OPU2, and the corresponding relationship between the MSI values and the slots is shown in fig. 3. Wherein 00 denotes an Optical Data Tributary Unit (ODTU) 12, that is, the ODU1 is mapped to the ODU2 through an asynchronous mapping procedure; 01 denotes a reservation; 10 denotes odtu2.ts, i.e. low order optical data units are mapped to ODU2 by GMP; 11 indicates Unallocated, i.e., the time slot of ODU2 is unoccupied; the last 6 bits indicate the tributary port number of the ODU2 timeslot map. For example, when 8 ODUflex respectively occupy one timeslot for multiplexing to the ODU2, the MSI value of the OPU2 is 8081828384858687, and when 1 ODUflex occupies the 1 st, 2 nd, and 4 th timeslots, and the remaining 5 ODUflex respectively occupy one timeslot for multiplexing to the ODU2, the MSI value of the OPU2 is 8080828084858687. Therefore, the number and the position of the time slots occupied by the ODUflex can be determined by the MSI value in the high-order OPUk.

Fig. 4 is a flowchart of a transmission rate adjustment method in an optical transport network according to an embodiment of the present application.

The first device is a terminal device in an optical transport network, and if the terminal device in the optical transport network is a ring-type connection, the first device is any terminal device in the ring-type network; if the terminal device in the optical transport network is a line type connection, the first device is a terminal device of an endpoint in the line type network. The "second apparatus" is an apparatus downstream of the "first apparatus". In this flow, a description will be given by taking as an example that only the "first device" and the "second device" are included in the optical channel.

As shown, the process includes:

s401: the first device receives a transmission rate adjustment instruction, where the transmission rate adjustment instruction is an instruction for adjusting target timeslot information of a higher-order ODUk occupied by a target ODUflex.

In practical applications, because an operator actively reallocates resources or a client proposes a change of a used bandwidth, and the like, it is necessary to adjust a transmission rate of an optical channel corresponding to a target optical data unit, so that a transmission rate adjustment instruction may be sent to a first device by a network management server through a simple network management protocol, or may be sent to the first device directly through another external device.

The transmission rate adjustment command includes, but is not limited to, the following: a transmission rate adjust flag (rate adjust) for indicating that the instruction is a rate adjust operation item; an optical data unit type (ODUflex) to be adjusted; an optical data unit port number (ODUflex port) to be adjusted; an add/delete direction indication (add/delete) for indicating an increase or decrease of the transmission rate; transmission rate variation (rate); indicating a transmission rate adjustment mode for occupying the timeslot information of the higher-order ODUk in which adjustment mode is used, for example, when the transmission rate adjustment mode is sequential filling according to an increased bandwidth, a transmission rate 2G is increased and sequential timeslots are filled, the increased bandwidth occupies 2 timeslots in a backward forward-backward direction on the basis of the currently occupied timeslots, and if the transmission rate adjustment mode is sequential filling according to a specified timeslot position, the specified timeslot positions are 1, 3, and 4, the increased bandwidth occupies timeslots at

positions

1, 3, and 4 of the higher-order OPUk; bandwidth reduction adjustments may of course also be made in a similar manner and are not described in detail here. The first device receives the transmission rate adjustment instruction and then analyzes the transmission rate adjustment instruction, so that target timeslot occupation information for adjusting the occupation of the target ODUflex on the high-order ODUk is obtained, and the target timeslot occupation information is used for indicating to adjust the transmission rate of the optical channel corresponding to the target optical data unit.

S402: and the first equipment determines the target time slot occupation information according to the transmission rate adjusting instruction so as to adjust the transmission rate of the optical channel corresponding to the target optical data unit.

In S402, after receiving the transmission rate adjustment instruction, the first device determines, by querying the local configuration, timeslot occupation information in the current higher-order ODUk, and determines, according to the transmission rate adjustment direction indication, the transmission rate variation, the transmission rate adjustment manner, and the timeslot occupation information in the current higher-order ODUk, target timeslot occupation information after rate adjustment, and accordingly removes the optical channel corresponding to the target optical data unit, and reconstructs the optical channel corresponding to the target optical data unit according to the target timeslot occupation information.

The target time slot occupation information is used for indicating the number and the position of the time slots occupied by the target optical data unit in the adjusted high-order optical data unit.

S403: the first device sends the rate adjustment information of the optical channel corresponding to the target optical data unit to the second device; the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information, wherein the rate adjustment instruction is used for instructing the second equipment to adjust the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information; wherein the second device is a downstream device of the first device.

In the above step, the first device loads the rate adjustment indication in the rate adjustment information into the reserved byte in the otn standard frame, and sends the otn standard frame to the second device; wherein, the rate adjustment indication comprises the following part or all information: a transmission rate adjustment direction indicator for indicating to increase or decrease the transmission rate; a protection channel transmission rate adjustment identifier for indicating whether to adjust the transmission rate of the protection channel; a transmission rate adjustment status flag for indicating whether to perform transmission rate adjustment; and the head position identifier of the multiplexing structure identifier of the high-order optical channel payload unit is used for indicating the time slot position of the low-order optical data unit mapped to the high-order optical channel payload unit.

Specifically, as shown in fig. 2, the reserved byte carrying the rate adjustment indication may be a reserved byte (EXP) located in the fourteenth column of the second row of the otn standard frame, or may be another reserved byte in the otn standard structure, which is not limited in this application. Fig. 5 is a schematic structural diagram of a bit distribution corresponding to a rate adjustment indicator according to an embodiment of the present application. It should be noted that the structure of the rate adjustment indication corresponding to the bit distribution includes, but is not limited to, the following ways. As shown in the figure, the rate adjustment indication occupies one byte overhead, the Most Significant Bit (MSB), that is, the 7 th Bit, is a master-slave identifier, and the master-slave identifier can only be written by a device that receives the transmission rate adjustment instruction from the network management server, that is, the terminal device that receives the data packet carrying the transmission rate adjustment instruction sent by the network management server is 1, and the remaining devices in the optical transmission network are 0; the 6 th bit is a transmission rate adjustment status flag, which is used to determine the transmission rate adjustment status by determining the transceiving status of the device, for example, if the receiving rate is 1 and the transmitting rate is 0, it indicates that the transmission rate adjustment operation is being performed, and if the receiving rate is 1 and the transmitting rate is 1, it indicates that the adjustment of the transmission rate is completed; bits 4-5 are transmission rate adjustment direction identifiers, 00 indicates that the transmission rate is kept unchanged, 01 indicates that the transmission rate is increased, and 10 indicates that the transmission rate is decreased; the 1 st to 3 rd bits are initial position identifiers of the MSI of the data unit to be adjusted, and are used for searching time slot occupation information of a low-order ODU in a high-order ODUk; the Least Significant Bit (LSB), i.e. the 0 th Bit, is the transmission rate adjustment flag of the protection channel, 0 indicates that the transmission rate of the protection channel is not adjusted, and 1 indicates that the transmission rate of the protection channel is adjusted.

It should be noted that the determination of the transceiving state of the device may be implemented by: after the device sends the rate adjustment information, the rate adjustment information is locally recorded as a sent state, and specifically, the hardware register learns the bit corresponding to the device according to a preset rule when the device sends or receives the message. For example, the transmitted value is set to 1, the non-transmitted value is 0, the received value is 1, and the non-received value is 0, so that the transceiving state can be judged by judging the corresponding bit of the hardware register.

S404: the second equipment receives the rate adjustment information of the optical channel corresponding to the target optical data unit sent by the first equipment; the rate adjustment information includes target slot occupancy information.

Optionally, the second device receives an optical transport network standard frame, where a reserved byte in the optical transport network standard frame carries a rate adjustment instruction, where the rate adjustment instruction is used to instruct the second device to perform transmission rate adjustment on an optical channel corresponding to the target optical data unit according to the target timeslot occupation information; wherein, the rate adjustment indication comprises the following part or all information: a transmission rate adjustment direction indicator for indicating to increase or decrease the transmission rate; a protection channel transmission rate adjustment identifier for indicating whether to adjust the transmission rate of the protection channel; a transmission rate adjustment status flag for indicating whether to perform transmission rate adjustment; and the head position identifier of the multiplexing structure identifier of the high-order optical channel payload unit is used for indicating the time slot position of the low-order optical data unit mapped to the high-order optical channel payload unit.

S405: and the second equipment adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the transmission rate adjusting instruction.

In S405, after receiving the transmission rate adjustment information, the second device removes the optical channel corresponding to the target optical data unit according to the transmission rate adjustment information, and reconstructs the optical channel corresponding to the target optical data unit according to the transmission rate adjustment information.

Optionally, after S405, the second device sends transmission rate adjustment result information to the first device, where the transmission rate adjustment result information is used to indicate whether the second device completes adjustment of the transmission rate of the optical channel.

Optionally, if the optical channel is a working channel, after receiving the transmission rate adjustment result information sent by the second device, the first device further adjusts the transmission rate of the protection channel corresponding to the target optical data unit according to the target time slot occupation information; the first device sends the rate adjustment information of the protection channel corresponding to the target optical data unit to the second device, wherein the rate adjustment information of the protection channel comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is used for instructing the second device to adjust the transmission rate of the protection channel corresponding to the target optical data unit according to the time slot occupation information; the second equipment adjusts the transmission rate of the protection channel according to the received rate adjustment information of the protection channel; further, the second device sends the transmission rate adjustment result information of the protection channel to the first device, where the transmission rate adjustment result information of the protection channel is used to indicate whether the second device completes adjustment of the transmission rate of the protection channel.

With reference to the flowchart of fig. 4, the method for adjusting a transmission rate in an optical transport network provided in the embodiment of the present application is illustrated by taking an example that a target optical data unit is an ODUflex, two devices (both a first device and a second device are terminal devices) are in the optical transport network, and the first device is an upstream device of the second device.

After receiving a transmission rate adjustment instruction sent by a network management server, a first device determines a configuration state of a current device and determines target timeslot occupation information of an ODUflex occupying a higher-order ODUk according to the transmission rate adjustment instruction. Since the first device is a terminal device, the adaptation thereof is known, and there exist adaptation from the ODUflex to the higher-order ODUk and adaptation from the service to the ODUflex; or there are adaptation from ODUflex to higher order ODUk, adaptation from service to ODUflex, and adaptation from protection ODUflex to protection higher order ODUk. The service is adapted to the ODUflex as a working channel, and the protection ODUflex is adapted to the protection higher-order ODUk as a protection channel.

After the judgment is completed, the first device removes the adaptation from the service to the ODUflex according to the sequence of the intersection, the adaptation and the multiplexing, removes the adaptation from the ODUflex to the higher-order ODUk according to the sequence of the intersection and the multiplexing, and reconstructs the adaptation from the service to the ODUflex and the adaptation from the ODUflex to the higher-order ODUk according to the sequence of the multiplexing, the adaptation and the intersection according to the transmission adjustment instruction and the target timeslot occupation information. Such as: the ODUflex corresponding to the service already occupies the 1 st, 2 nd, and 3 rd timeslots of the higher-order ODUk, and because the service needs to increase the 2G bandwidth and there is no timeslot position requirement, the 1 st, 2 nd, 3 th, 4 th, and 5 th timeslots of the higher-order ODUk can be adjusted to be the carrying rate of the service (timeslot position can be customized, such as sequential allocation or random allocation); and if the specified time slot position is the 6 th time slot and the 7 th time slot, adjusting the 1 st time slot, the 2 nd time slot, the 3 rd time slot, the 6 th time slot and the 7 th time slot of the higher-order ODUk as the bearing rate of the service.

And after the transmission rate of the working channel of the first device is adjusted, sending rate adjustment information to the second device, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is carried in reserved bytes in an optical transport network standard frame. Referring to the schematic diagram of the structure of the rate Adjustment indication corresponding to the bit distribution shown in fig. 5, in the default state, the timeslot Adjustment (TSAJ) of the reserved byte is TSAJ — 00000000. If the first device performs adjustment of increasing the transmission rate and the timeslot position that can occupy the higher-order ODUk is the 1 st timeslot, the TSAJ sent by the first device to the second device is 11010000.

After receiving the rate adjustment information, the second device performs rate adjustment according to the transmission rate adjustment method of the first device, which is not described again. And after the second device finishes the adjustment of the transmission rate, transmitting transmission rate adjustment result information to the first device, wherein the transmitted TSAJ overhead byte is 01010000.

After receiving the transmission rate adjustment result information, the first device determines whether the configuration state of the current device has adaptation from the protection ODUflex to the protection higher-order ODUk, that is, whether a protection channel exists. If not, the transmission rate adjustment of the whole optical channel of the optical transmission network is completed.

If the channel exists, the first device prohibits the enabling of the protection channel, removes the adaptation from the protection ODUflex to the protection higher-order ODUk according to the sequence of crossing and multiplexing, and reconstructs the adaptation from the protection ODUflex to the protection higher-order ODUk according to the sequence of multiplexing and crossing according to the transmission adjustment instruction and the target timeslot occupation information, thereby recovering the enabling of the protection channel. The normal transmission of the service is not influenced by the removal and the reconstruction of the protection channel.

After finishing the rate adjustment of the protection channel, the first device sends the rate adjustment information of the protection channel to the second device, where the rate adjustment indication in the rate adjustment information is carried in a reserved byte of the otn standard frame, and a value TSAJ of the reserved byte is 11000001.

And after receiving the rate adjustment of the protection channel, the second device adjusts the rate of the protection channel according to the rate adjustment method for the protection channel of the first device, and the process is not repeated. And after the second device finishes the rate adjustment of the protection channel, transmitting the transmission rate adjustment result information of the protection channel to the first device, wherein the transmitted TSAJ is 01000001.

After receiving the transmission rate adjustment result information of the protection channel, the first device sets the TSAJ to 00000000, and thus the transmission rate adjustment of the optical channel of the optical transport network is completed.

Based on the above embodiments, in one case, a relay device is further configured between the first device and the second device, and a transmission rate adjustment flowchart thereof is as shown in fig. 6.

After completing the rate adjustment of the working channel, the first device sends rate adjustment information to the relay device, taking the first device to perform adjustment of increasing the transmission rate and occupy the high-order 1 st timeslot as an example, in which case TSAJ is 11010000. Since the relay device only has the adaptation from the ODUflex to the higher-order ODUk, the relay device removes the adaptation from the ODUflex to the higher-order ODUk in the order of crossing and multiplexing according to the received rate adjustment information, and reconstructs the adaptation from the ODUflex to the higher-order ODUk in the order of multiplexing and crossing. After completing rate adjustment, the relay device sends rate adjustment information to the second device downstream, where TSAJ is 01010000. After receiving the rate adjustment information, the second device performs rate adjustment in the manner described in the above embodiment, and after the rate adjustment is completed, sends transmission rate adjustment result information, where TSAJ is 01010000, to the relay device. The relay device transmits the received transmission rate adjustment result information to the first device, and TSAJ is 01010000.

And after receiving the transmission rate adjustment result information sent by the relay equipment, the first equipment judges whether a protection channel exists or not. If not, the transmission rate adjustment of the whole optical channel of the optical transmission network is completed.

If so, the first device adjusts the transmission rate of the protection channel in the manner described in the above embodiment. After the rate adjustment of the protection channel is completed, the first device sends the rate adjustment information of the protection channel to the relay device, and TSAJ is 11000001. After receiving the rate adjustment information of the protection channel, the relay device performs rate adjustment of the protection channel in the manner described in the above embodiment, and after the rate adjustment of the protection channel is completed, sends the rate adjustment information of the protection channel to the second device, where TSAJ is 01000001. After receiving the rate adjustment information of the protection channel, the second device performs rate adjustment of the protection channel in the manner described in the above embodiment, and after the rate adjustment of the protection channel is completed, sends transmission rate adjustment result information of the protection channel to the relay device, where TSAJ is 01000001. The relay device sends the received transmission rate adjustment result information of the protection channel to the first device, and TSAJ is 01000001.

It should be noted that the rate adjustment method in the foregoing embodiment may be extended to an optical transmission network formed by a plurality of terminal devices and a plurality of relay devices, and the rate adjustment method is the same as the foregoing method, and is not described herein again.

It should be noted that, in the foregoing embodiment, specific implementation methods of intersection, adaptation, and multiplexing in judgment of a current device state, judgment of a protection channel, and removal and reconstruction are all the prior art, and this is not limited in this application.

Based on the same technical concept, the embodiment of the present application further provides a transmission rate adjustment apparatus, which can implement the process executed in fig. 4 in the foregoing embodiment.

Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application. The apparatus comprises: receiving section 701, adjustment sheet 702, and transmitting section 703.

A receiving unit 701, configured to receive a transmission rate adjustment instruction, where the transmission rate adjustment instruction is an instruction for adjusting target timeslot information that a target optical data unit occupies a high-order optical data unit, and the target optical data unit is an optical data unit with a configurable rate.

An adjusting unit 702, configured to determine target timeslot occupation information according to the transmission rate adjustment instruction, where the target timeslot occupation information adjusts a transmission rate of an optical channel corresponding to the target optical data unit.

A sending unit 703, configured to send rate adjustment information of an optical channel corresponding to the target optical data unit to a downstream device connected to a network device, where the rate adjustment information includes a rate adjustment instruction and timeslot occupation information, and the rate adjustment instruction is used to instruct the downstream device to perform transmission rate adjustment on the optical channel corresponding to the target optical data unit according to the target timeslot occupation information.

Optionally, the sending unit is specifically configured to bear the rate adjustment indication in a reserved byte in an optical transport network standard frame, and send the optical transport network standard frame to the downstream device.

Optionally, the rate adjustment indication includes some or all of the following information: a transmission rate adjustment direction indicator for indicating to increase or decrease the transmission rate; a protection channel transmission rate adjustment identifier for indicating whether to adjust the transmission rate of the protection channel; a transmission rate adjustment status flag for indicating whether to perform transmission rate adjustment; and the head position identifier of the multiplexing structure identifier of the high-order optical channel payload unit is used for indicating the time slot position of the low-order optical data unit mapped to the high-order optical data unit.

Optionally, the adjusting unit is specifically configured to remove the optical channel corresponding to the target optical data unit according to the transmission rate adjusting instruction, and reconstruct the optical channel corresponding to the target optical data unit according to the rate adjusting information carried by the transmission rate adjusting instruction.

Optionally, the receiving unit is further configured to receive transmission rate adjustment result information sent by the second device, where the transmission rate adjustment result information is used to indicate whether the second device completes adjustment of the transmission rate of the optical channel.

Optionally, the optical channel is a working channel; the adjusting unit is further configured to adjust a transmission rate of a protection channel corresponding to the target optical data unit according to the transmission rate adjusting instruction; the sending unit is further configured to send rate adjustment information of the protection channel corresponding to the target optical data unit to the downstream device, where the rate adjustment information of the protection channel includes a rate adjustment indication and target timeslot occupation information, and the rate adjustment indication is used to instruct the downstream device to perform transmission rate adjustment on the protection channel corresponding to the target optical data unit according to the target timeslot occupation information.

Based on the same technical concept, embodiments of the present application further provide a network device, which may implement the process performed in fig. 4 in the foregoing embodiments.

Fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application. The apparatus comprises: receiving section 801 and adjusting section 802.

A receiving unit 801, configured to receive rate adjustment information of an optical channel corresponding to a target optical data unit sent by an upstream device connected to the network device, where the rate adjustment information includes a rate adjustment instruction and target timeslot occupation information, and the rate adjustment instruction is used to instruct the network device to perform transmission rate adjustment on the optical channel corresponding to the target optical data unit according to the target timeslot occupation information;

an adjusting unit 802, configured to adjust a transmission rate of an optical channel corresponding to the target optical data unit according to the rate adjustment information.

Optionally, if the network device is further connected with a downstream device, the method further includes: and the network equipment sends the rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream equipment, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information.

Optionally, after the network device adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information, the method further includes: and the network equipment sends transmission rate adjustment result information to the upstream equipment, wherein the transmission rate adjustment result information is used for indicating whether the network equipment completes the adjustment of the transmission rate of the optical channel.

Optionally, the receiving, by the network device, rate adjustment information of an optical channel corresponding to the target optical data unit sent by the upstream device includes: and the network equipment receives an optical transmission network standard frame sent by the upstream equipment, wherein the reserved bytes in the optical transmission network standard frame carry the rate adjustment indication.

Optionally, the adjusting, by the network device, the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information includes: and the network equipment removes the optical channel corresponding to the target optical data unit according to the rate adjustment indication, and reconstructs the optical channel corresponding to the target optical data unit according to the target time slot occupation information carried by the rate adjustment information.

Based on the same technical concept, the embodiment of the present application further provides a communication device, which can implement the flow executed in fig. 4 in the foregoing embodiment.

Fig. 9 shows a schematic structural diagram of a communication apparatus 900 provided in an embodiment of the present application, that is, shows another schematic structural diagram of a network device 700. Referring to fig. 9, the communication device 900 includes a processor 901, a memory 902, and optionally a communication interface 903. The processor 901 may also be a controller. The processor 901 is configured to enable the terminal to perform the functions involved in the aforementioned procedures. A memory 902 is used for coupling with the processor 901 and holds the necessary program instructions and data for the terminal. The processor 901, the memory 902 and the communication interface 903 are connected, the memory 902 is used for storing instructions, and the processor 901 is used for executing the instructions stored in the memory 902 to complete the steps of the method in which the client device executes corresponding functions.

In the embodiment of the present application, for concepts, explanations, detailed descriptions, and other steps related to the network device 700 and the communication apparatus 900 and related to the technical solutions provided in the embodiments of the present disclosure, please refer to the description of the foregoing methods or the descriptions related to these contents in other embodiments, which are not described herein again.

It should be noted that the processor referred to in the embodiments of the present disclosure may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic devices, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. Wherein the memory may be integrated in the processor or may be provided separately from the processor.

Fig. 10 shows a schematic structural diagram of a communication apparatus 1000 provided in an embodiment of the present application, that is, shows another schematic structural diagram of a network device 800. Referring to fig. 10, the communication device 1000 includes a processor 1001, a memory 1002, and optionally a communication interface 1003. The processor 1001 may also be a controller. The processor 1001 is configured to enable the terminal to perform the functions involved in the aforementioned procedures. A memory 1002 is used for coupling with the processor 1001, which holds the necessary program instructions and data for the terminal. The processor 1001, the memory 1002 and the communication interface 1003 are connected, the memory 1002 is used for storing instructions, and the processor 1001 is used for executing the instructions stored in the memory 1002 to complete the steps of the client device executing the corresponding functions in the above method.

In the embodiment of the present application, for concepts, explanations, detailed descriptions, and other steps related to the network device 800 and the communication apparatus 1000 and related to the technical solutions provided in the embodiments of the present disclosure, please refer to the description of the foregoing methods or the descriptions related to these contents in other embodiments, which are not described herein again.

Based on the same technical concept, the embodiment of the application also provides a computer readable storage medium. The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the process performed in fig. 4.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for adjusting a transmission rate in an optical transmission network, comprising:

the network device sends rate adjustment information of an optical channel corresponding to the target optical data unit to a downstream device connected with the network device, wherein the rate adjustment information comprises a rate adjustment instruction and the target time slot occupation information, and the rate adjustment instruction is used for instructing the downstream device to adjust the transmission rate of the optical channel corresponding to the target optical data unit according to the target time slot occupation information;

the network equipment receives transmission rate adjustment result information sent by the downstream equipment, wherein the transmission rate adjustment result information is used for indicating whether the downstream equipment completes the adjustment of the transmission rate of the optical channel;

if the optical channel is a working channel, after the network device receives transmission rate adjustment result information sent by the downstream device and used for indicating that the optical channel transmission rate adjustment is completed, the method further includes:

2. The method of claim 1, wherein the network device sending the rate adjustment information of the optical channel corresponding to the target optical data unit to the downstream device, comprises:

3. The method of claim 2, wherein the rate adjustment indication comprises some or all of the following information:

4. The method of claim 1,

the target timeslot occupation information is used to indicate the number and the location of timeslots occupied by the target optical data unit in the adjusted high-order optical data unit.

5. The method of claim 1, wherein the network device adjusting the transmission rate of the optical channel corresponding to the target optical data unit according to the transmission rate adjustment instruction comprises:

6. The method of any of claims 1 to 5, wherein the transmission rate adjustment instruction carries information comprising at least one of:

7. A method for adjusting a transmission rate in an optical transmission network, comprising:

the network equipment adjusts the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information;

the network device sends transmission rate adjustment result information to the upstream device, wherein the transmission rate adjustment result information is used for indicating whether the network device completes the adjustment of the transmission rate of the optical channel;

if the optical channel is a working channel, after the network device sends the transmission rate adjustment result information to the upstream device, the method further includes:

the network device receives rate adjustment information of a protection channel corresponding to a target optical data unit sent by an upstream device connected with the network device, wherein the rate adjustment information of the protection channel comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is used for instructing the network device to adjust the transmission rate of the protection channel corresponding to the target optical data unit according to the target time slot occupation information;

and the network equipment adjusts the transmission rate of the protection channel corresponding to the target optical data unit according to the rate adjustment information of the protection channel.

8. The method of claim 7, wherein if a downstream device is further connected to the network device, the method further comprises:

9. The method of claim 7, wherein the network device receiving the rate adjustment information of the optical channel corresponding to the target optical data unit sent by the upstream device comprises:

10. The method of claim 9, wherein the rate adjustment indication comprises some or all of the following information:

11. The method of claim 7,

the target time slot occupation information is used for indicating the time slot number and time slot position occupied by the target optical data unit in the adjusted high-order optical data unit.

12. The method of claim 7, wherein the network device adjusting the transmission rate of the optical channel corresponding to the target optical data unit according to the rate adjustment information comprises:

13. A network device, comprising:

a sending unit, configured to send rate adjustment information of an optical channel corresponding to the target optical data unit to a downstream device connected to a network device, where the rate adjustment information includes a rate adjustment instruction and the target timeslot occupation information, and the rate adjustment instruction is used to instruct the downstream device to perform transmission rate adjustment on the optical channel corresponding to the target optical data unit according to the target timeslot occupation information;

the receiving unit is further configured to receive transmission rate adjustment result information sent by the downstream device, where the transmission rate adjustment result information is used to indicate whether the downstream device completes adjustment of the optical channel transmission rate;

if the optical channel is a working channel, the adjusting unit is further configured to:

the sending unit is further configured to:

14. The network device of claim 13, wherein the sending unit is specifically configured to:

15. The network device of claim 14, wherein the rate adjustment information includes some or all of the following information:

16. A network device, comprising:

an adjusting unit, configured to adjust a transmission rate of an optical channel corresponding to the target optical data unit according to the rate adjustment information;

a sending unit, configured to send transmission rate adjustment result information to the upstream device, where the transmission rate adjustment result information is used to indicate whether the network device completes adjustment of the transmission rate of the optical channel;

if the optical channel is a working channel, the receiving unit is further configured to:

receiving rate adjustment information of a protection channel corresponding to a target optical data unit sent by an upstream device connected with the network device, wherein the rate adjustment information of the protection channel comprises a rate adjustment instruction and target time slot occupation information, and the rate adjustment instruction is used for instructing the network device to perform transmission rate adjustment on the protection channel corresponding to the target optical data unit according to the target time slot occupation information;

the adjusting unit is further configured to:

17. The network device of claim 16, wherein the sending unit is further to:

and sending rate adjustment information of the optical channel corresponding to the target optical data unit to downstream equipment, wherein the rate adjustment information comprises a rate adjustment instruction and target time slot occupation information.

18. The network device of claim 16, wherein the receiving unit is specifically configured to:

19. The network device of claim 18, wherein the rate adjustment indication includes some or all of the following information:

20. A communications apparatus, comprising: a processor, a memory, and a communication interface;

the memory to store computer instructions;

the processor for executing the computer instructions to implement the method of any one of claims 1 to 6.

21. A communications apparatus, comprising: a processor, a memory, and a communication interface;

the memory to store computer instructions;

the processor for executing the computer instructions to implement the method of any one of claims 7 to 12.

22. A computer-readable storage medium, characterized in that the storage medium stores computer instructions which, when executed by a processor, implement the method of any of claims 1 to 6.

23. A computer-readable storage medium, characterized in that the storage medium stores computer instructions which, when executed by a processor, implement the method of any of claims 7 to 12.