WO2025146038A1 - Time slot adjustment method - Google Patents

Abstract

Provided in the present application is a time slot adjustment method. The method comprises: after a time slot adjustment policy is determined by means of negotiation with a downstream node and a sink node, using the time slot adjustment policy at a time slot adjustment moment to complete time slot adjustment; and by means of the downstream node, sending a plurality of pieces of time slot adjustment indication information to the sink node, such that the downstream node and the sink node determine the time slot adjustment moment on the basis of the plurality of pieces of time slot adjustment indication information, and use the time slot adjustment policy at the time slot adjustment moment to complete time slot adjustment.

Description

A time slot adjustment method

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number 202410011738.1 and application date January 2, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference.

Technical Field

The embodiments of the present application relate to but are not limited to the field of communication technology, and in particular, to a time slot adjustment method.

Background Art

At present, in communication networks, customer services are usually carried in a time slot manner. Many time slots are divided in the bearer frame of the physical channel, or many time slots are divided in many bearer frames. Customer services can be carried in each time slot, and the time slots are strictly physically isolated from each other without affecting each other. As shown in Figure 1, the bearer frame is divided into multiple time slots. Customer services are carried in time slots 1 and 2, and other time slots do not carry customer services. In the application, each customer service can be carried and transmitted in some time slots, so that the speed of customer services can be flexibly changed. When the customer service bandwidth is large, it is selected to be carried in multiple time slots; when the customer service bandwidth is small, it is carried in a small number of time slots. The customer service bandwidth and the number of time slots carried correspond to meet customer services of various bandwidth sizes. In actual applications, the bandwidth demand of customer services is variable. When customers are in the start-up stage, the service bandwidth demand is relatively small, and a small number of time slots are purchased to carry services. Over time, the customer's market may expand and grow, requiring larger service bandwidth and more time slots to carry customer services. For services in a declining market, the customer service bandwidth may decrease after a period of time, and the number of time slots carried may need to be reduced. Therefore, the number of time slots for customer services needs to be adjusted dynamically and losslessly to meet the needs of changing customer service bandwidth.

Compared with the traditional hop-by-hop negotiation and hop-by-hop adjustment mechanism, after the end-to-end time slot adjustment negotiation is successful, the time slot adjustment activity is started by carrying the time slot adjustment indication signal through the customer service, which reduces the negotiation time, avoids the serious consequences of unsuccessful adjustment negotiation during hop-by-hop adjustment, avoids the need for fallback when the adjustment is unsuccessful, saves adjustment negotiation time, and increases the probability of successful adjustment. However, when the service bandwidth change time and the time slot number change time are different, due to the speed difference between the two, a buffer is needed to temporarily store the customer service to adapt to the speed difference between the two. The longer the difference between the service bandwidth change time and the time slot number change time lasts, the larger the amount of service that needs to be cached, and the higher the cost.

Summary of the invention

An embodiment of the present application provides a time slot adjustment method.

On the one hand, an embodiment of the present application provides a time slot adjustment method, including: after the time slot adjustment strategy is determined through negotiation with the downstream node and the host node, the time slot adjustment strategy is adopted at the time slot adjustment moment to complete the time slot adjustment; multiple time slot adjustment indication information is sent to the host node through the downstream node, so that the downstream node and the host node determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and the time slot adjustment strategy is adopted at the time slot adjustment moment to complete the time slot adjustment.

On the other hand, an embodiment of the present application also provides a time slot adjustment method, including: after determining the time slot adjustment strategy through negotiation with the upstream node and the downstream node, when receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment moment according to the multiple time slot adjustment indication information, and using the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment; sending the multiple time slot adjustment indication information to the downstream node, so that the downstream node determines the time slot adjustment moment according to the multiple time slot adjustment indication information, and uses the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment.

On the other hand, an embodiment of the present application also provides a time slot adjustment method, including: after negotiating and determining the time slot adjustment strategy with the upstream node, when receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment time according to the multiple time slot adjustment indication information; and using the time slot adjustment strategy at the time slot adjustment time to complete the time slot adjustment.

On the other hand, an embodiment of the present application further provides a communication device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the time slot adjustment method as described above when executing the computer program.

On the other hand, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the time slot adjustment method as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a structure in which a bearer frame is divided into multiple time slots in the related art;

FIG2 is a schematic diagram of a frame structure developed by China Mobile in the related art;

FIG3 is a schematic diagram of an adjustment process for reducing time slot requirements in the related art;

FIG4 is a schematic diagram of an adjustment process for increasing time slot requirements in the related art;

FIG5 is a schematic diagram of a time slot adjustment process in the related art;

FIG6 is a schematic diagram of a time slot negotiation handshake in the related art;

FIG7 is a flow chart of a time slot adjustment method provided in an embodiment of the present application;

8 is a schematic diagram of inserting time slot adjustment information in a service flow according to an embodiment of the present application;

FIG9 is a schematic diagram of the structure of an o-code block provided in an embodiment of the present application;

10 is a schematic diagram of a structure in which a time slot adjustment indication code block appears at a certain time in the middle of a bearer frame according to an embodiment of the present application;

11 is a schematic diagram of a structure in which the effective time slot position is used as a reference time point and a new adjustment time slot is switched at the effective time slot position according to an embodiment of the present application;

FIG12 is a schematic diagram of confirming a reference time point provided in an embodiment of the present application;

FIG13 is another schematic diagram of confirming a reference time point provided in an embodiment of the present application;

FIG14 is a schematic diagram of a fixed number of client code blocks spaced between specially defined code blocks provided by an embodiment of the present application;

15 is a schematic diagram of a case where the interval between the time slot switching time code block and the time slot adjustment indication code block is a T2 value provided by an embodiment of the present application;

16 is a schematic diagram of an embodiment of the present application providing a time slot adjustment indication code block where the desired insertion position is located in the middle of the message;

17 is a schematic diagram of an embodiment of the present application providing an OAM code block that is sent at equal intervals and in a fixed order according to a period T;

FIG18 is a schematic diagram of an OAM code block expansion function provided in an embodiment of the present application;

FIG19 is a schematic diagram of the structure of a new OAM sequence provided in an embodiment of the present application;

20 is a schematic diagram of the structure of an OAM sequence for sending a pseudo-L code block provided in an embodiment of the present application;

21 is a schematic diagram of the structure of an APS code block sequence extending the APS code block sequence carrying time slot adjustment indication information provided in an embodiment of the present application;

FIG22 is a schematic diagram of inserting a time slot adjustment indication code block into an APS code block sequence provided by an embodiment of the present application;

23 is a schematic diagram of sending a specially defined pseudo L code block at the L code block position in the 32nd to 64th small cycle period of the OAM sequence provided by an embodiment of the present application;

24 is a schematic diagram of time slot adjustment indication information carrying a check function on B1 and B2 code blocks provided in an embodiment of the present application;

FIG25 is a schematic diagram of a process for selecting time slots for adjustment between devices provided in an embodiment of the present application;

26 is a schematic diagram of the cancellation process of the time slot application provided in an embodiment of the present application;

27 is a flowchart of a process of first nodes negotiating and determining a time slot adjustment strategy according to an embodiment of the present application;

FIG28 is a flowchart of a time slot adjustment method provided by another embodiment of the present application;

29 is a flowchart of a process in which intermediate nodes negotiate and determine a time slot adjustment strategy according to an embodiment of the present application;

FIG30 is a flowchart of a time slot adjustment method provided by another embodiment of the present application;

FIG. 31 is a flowchart of a process for tail node negotiation and determination of a time slot adjustment strategy provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the purpose, technical methods and advantages of this application more clear, the following is a detailed description of this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that in the flowchart. In the description of the specification, claims and the above-mentioned drawings, the meaning of multiple (or multiple) is more than two, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, within, etc. are understood to include the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

It is worth noting that the communication network usually adopts a frame structure to carry customer services and divides time slots in the bearer frame. The equipment generally supports carrying customer services in a time slot manner, such as equipment that supports the international standard MTN protocol and various types of bearer equipment that supports the SPN equipment defined by China Mobile. The bearer frame consists of a frame header, a container, and a frame tail. Time slots can be divided in the container. The position of the time slot is fixed and is transmitted on the network with the bearer frame. Each customer service can be selected to be transmitted in a fixed time slot, and different customers can choose different time slot positions to carry. When the customer bandwidth is large, multiple time slot positions can be selected for carrying, and when the customer bandwidth is small, a small number of time slot positions can be selected for carrying. When carrying customer services, the customer service can be first mapped to the corresponding time slot of the bearer frame on the source device and sent out, and then the intermediate device forwards the bearer frame, and finally the host device extracts the customer service from the corresponding time slot in the bearer frame to restore the original customer service.

The bearer frame generally has a fixed frame structure, similar to the result of Ethernet message encoding. Ethernet services can be 64/66 encoded when transmitting. In the 64/66 encoding rules of the Ethernet 802.3 protocol, each code block consists of 66 bytes. The first two bits are the synchronization header of the code block. The synchronization header bit is "01" to indicate that it is a D code block (data code block), and the following 8 bytes (64 bits) are 8 bytes of data content; the synchronization header bit is "10" to indicate that it is a control code block. The first byte content immediately following indicates the type of control block, and the following 7 bytes are the content of the control block. The 7-byte content is determined by the type of control block. S code blocks, T code blocks, o code blocks, and idle code blocks are all control code blocks. S code blocks, T code blocks, IDLE code blocks, and o code blocks are all control code blocks. The first byte content in the S code block is 0x78, indicating that the control code block is an S code block. The S code block represents the first code block in a data message code block stream. The T code block indicates the last code block in a data message code block stream and is the end block of the message. In addition to indicating the end block, the T code block can also carry customer byte content (located in the last 7 bytes of the code block). In the Ethernet standard, there are 8 types of T code blocks: T0, T1, T2, T3, T4, T5, T6, and T7. The T0 code block (the first byte content is 0x87) does not carry customer information, the T1 code block (the first byte content is 0x99) carries 1 byte of customer information, the T2 code block (the first byte content is 0x99) carries 2 bytes of customer information, and so on. The T7 code block (the first byte content is 0xFF) carries 7 bytes of customer information. The IDLE code block (also referred to as the I code block) is an idle code block or an error indication code block, and the control word content is 0x1E. The o code block is a maintenance management code block, and the control word content is 0x4B.

At present, different standards at home and abroad have formulated different bearer frame formats, see Figure 2, Figure 2 is the frame structure formulated by China Mobile. As shown in Figure 2, the bearer frame consists of 1 S code block, 195 D code blocks, and 1 T code block. Overhead byte information and 24 time slots are divided on the D code block in the frame. Every 20 frames organize a multiframe, and there are 480 time slots in a multiframe cycle. The lower figure in Figure 2 is the frame structure in the standard document being formulated by the International Telecommunication Union (ITU). The bearer frame consists of 1 S code block, 990 D code blocks, and 1 T code block. Overhead byte information and 480 time slots are divided on the D code block in the frame. At the same time, 480 frames organize a multiframe. Each frame in the multiframe transmits the relevant overhead information of a time slot, and the relevant overhead information of 480 time slots is transmitted through 480 frames in a multiframe. Regardless of the standard, the overhead bytes in the bearer frame generally include the following information:

MFI: Multi-frame indicator;

GCC: General Communication Channel;

Slot num: slot number;

client num: client number;

CR: Configuration request;

CA: Configuration Acknowledge;

C: Configuration come into force;

S: Send notice of time slot increase adjustment.

In actual business applications, initially, the customer service volume is small, the purchased network bandwidth is small, and only a small number of time slots are needed. After a period of time, the customer service volume increases, and more time slots are needed to carry customer services. The time slot increase operation needs to be completed, and the number of time slots needs to be increased without affecting or interrupting customer services. For corporate services in a declining market, customer services decrease after a period of time, and the number of time slots carried needs to be reduced. In this way, the number of time slots carrying customer services needs to be dynamically reduced without affecting customer services. The traditional solution adopts a hop-by-hop negotiation and hop-by-hop adjustment mechanism. The adjustment process first starts the handshake negotiation process of time slot adjustment: one end device sends a time slot adjustment request signal, and the other end device receives the time slot adjustment request signal and sends back a time slot adjustment response and confirmation signal. When the device that sends the time slot adjustment request signal receives the response signal, the negotiation between the two devices is completed, and the time slot number adjustment can be started. Referring to FIG3, FIG3 is an adjustment process for reducing time slot requirements. When the time slot needs to be reduced, the source device (device 1) sends a time slot adjustment reduction request signal CR (Configuration request) to the downstream device 2. When sending the CR signal, the time slot number to be reduced is sent, prompting the downstream device 2 that the time slot number needs to be reduced. After receiving the CR signal, device 2 sends a time slot adjustment response signal CA (Configuration Acknowledge) to device 1 after completing the preparation work. After device 1 receives the time slot adjustment response signal CA from device 2, the negotiation work of time slot reduction adjustment between device 1 and device 2 is completed. Device 1 sends an adjustment indication signal C (Configuration come into force). Device 1 and device 2 then carry customer services according to the time slot position after the reduction adjustment. When device 2 receives the adjustment indication signal C from device 1, it starts to send a time slot reduction adjustment application signal CR to the downstream device 3 from device 2. When sending the CR signal, it also sends the time slot number to be reduced and adjusted. After receiving the CR signal, device 3 will send a response CA to device 2 after completing the preparation work. After device 2 receives the response CA signal from device 3, the negotiation of time slot reduction adjustment between device 2 and device 3 is completed. After device 2 receives the response CA signal from device 3, it sends an adjustment indication signal C. Devices 2 and 3 then carry customer services at the reduced and adjusted time slot positions. By analogy, device 3 and device 4 complete the negotiation and adjustment of time slot reduction adjustment, thus completing all time slot adjustment work. The above adjustment process is negotiated and adjusted section by section. During the adjustment process, some devices have completed the adjustment and carry services according to the adjusted number of time slots; some devices have not completed the adjustment and carry services according to the number of time slots before the adjustment. During the reduction adjustment process, the number of time slots between upstream adjacent devices is reduced first. After the number of time slots of upstream adjacent nodes is reduced, the time slot reduction operation of downstream devices is started, and the number of time slots between upstream nodes is always kept less than the number of time slots between downstream nodes, that is, the service bandwidth between upstream nodes is less than the service bandwidth between downstream nodes, to avoid the upstream service bandwidth in the pipeline being greater than the downstream service bandwidth, resulting in service overflow at some node locations because the upstream bandwidth is greater than the downstream bandwidth. During the adjustment process, the end-to-end bandwidth reduction adjustment of the service is completed only after the devices of the last two nodes complete the time slot reduction adjustment.

When adding time slots, in order to ensure that the service bandwidth between upstream nodes is less than the service bandwidth between downstream nodes, China Mobile's corporate standard stipulates that when time slots are added and adjusted, the time slots are added and adjusted starting from the sink device. Refer to Figure 4, which is the adjustment process of increasing the time slot demand. When time slots need to be added, the sink device (device 4) sends a bandwidth increase adjustment notification information S (send notice) signal to the upstream device 3. After the upstream device 3 receives the S signal, the device 3 starts the increase adjustment and sends a CR signal to the device 4, and sends the time slot number to be increased and adjusted at the same time. After receiving the CR signal, the device 4 returns the time slot increase adjustment response signal CA to the device 3 after completing the preparation work. After receiving the response CA signal from the device 4, the negotiation work of the time slot increase adjustment between the device 3 and the device 4 is completed, and the device 3 sends the adjustment indication signal C to the device 4. Then the device 3 and the device 4 carry the customer service according to the time slot after the increase and adjustment of the time slot. At the same time, device 3 sends a time slot increase adjustment notification information S signal to upstream device 2. After upstream device 2 receives the S signal, device 2 starts the time slot increase adjustment negotiation work, sends a CR signal to device 3, and sends the increased and adjusted time slot number at the same time. After receiving the CR signal, device 3 returns a response CA signal to device 2 after completing the preparation work. After device 2 receives the response CA signal from device 3, the negotiation work of time slot increase adjustment between device 2 and device 3 is completed. Device 2 sends an adjustment indication signal C to device 3. Device 2 and device 3 then carry customer services according to the time slot after the increased time slot adjustment. At the same time, device 2 sends a bandwidth increase adjustment notification information S to upstream device 1. By analogy, device 1 and device 2 complete the negotiation and time slot increase adjustment work of time slot increase adjustment, thus completing all time slot increase adjustment processes. The adjustment process is negotiated and completed segment by segment. In the process of adding time slots, the number of time slots is always increased between downstream devices first, and the number of time slots is increased between upstream devices later. The number of time slots between upstream nodes is always kept less than that between downstream nodes, that is, the service bandwidth between upstream nodes is less than that between downstream nodes, to avoid the upstream service bandwidth in the pipeline being greater than the downstream service bandwidth, resulting in service overflow. In the process of adding time slots, the end-to-end bandwidth increase adjustment of the service is completed only after the devices of the last two nodes complete the time slot increase adjustment.

The traditional bandwidth adjustment process is negotiated and completed segment by segment. After one segment is adjusted, the adjustment of the next segment is started. The adjustment process is very time-consuming. At the same time, the negotiation and completion of each segment bring a major disadvantage, that is, some segments have been adjusted, and some segments encounter unexpected situations during the adjustment process (for example, CR and CA encounter interference during the adjustment between some nodes, resulting in signal loss, or a certain device encounters difficulties and cannot send back the response CA signal, and the negotiation between upstream and downstream devices fails). When the time slot adjustment negotiation between some devices fails, the subsequent time slot adjustment work cannot be carried out. In this way, some devices that have successfully adjusted on the network work according to the new number of time slots, and some devices work according to the old number of time slots, and the end-to-end bearer bandwidth of the service is inconsistent. In the case of negotiation failure between some devices and the inability to continue the time slot adjustment of subsequent devices, the fallback mechanism is generally started, and the successfully adjusted devices are returned to the original, unadjusted time slot state according to the time slot adjustment process and with the opposite number. For example, if during the time slot increase adjustment, some devices are successfully adjusted while others fail to adjust, then for the successfully adjusted devices, the time slot reduction adjustment activity is initiated, and the increased time slots are deleted again according to the time slot reduction mechanism, and the time slot rollback work is completed. Similarly, if during the time slot reduction adjustment, some devices are successfully adjusted while others fail to adjust, then for the successfully adjusted devices, the time slot increase adjustment activity is initiated, and the reduced time slots are added back according to the time slot increase mechanism, and the time slot rollback work is completed. The time slot rollback process is also very cumbersome. For example, sometimes during the rollback, the rollback adjustment may fail again, and the rollback cannot be continued, which puts the device in a dilemma of being unable to complete the end-to-end time slot adjustment but unable to complete the end-to-end time slot rollback. In the networking of different manufacturers, due to the different internal processing mechanisms of different manufacturers, failures are prone to occur in the time slot adjustment negotiation, which makes the traditional time slot adjustment application difficult.

In order to solve the problems of slow adjustment speed and poor adjustment reliability in the current time slot adjustment scheme, FIG5 provides an end-to-end time slot negotiation adjustment scheme, as shown in FIG5, which is a schematic diagram of the time slot adjustment process. The time slot adjustment process is as follows: the network management system sends the time slot configuration content and adjustment command to the source device to determine the source device and the sink device. Whether increasing or reducing the adjustment time slot, the time slot adjustment is initiated by the source device. The source device 1 sends a bandwidth adjustment application signal CR to the downstream device 2, and sends the adjusted time slot number at the same time when sending the CR signal, prompting the downstream device 2 to adjust the time slot number. After receiving the CR signal, the intermediate device 2 starts the preparation work, but does not immediately send the response signal CA back to the device 1. The device 2 continues to send the time slot adjustment application signal CR to the downstream device 3, and sends the adjusted time slot number at the same time. Similarly, after receiving the CR signal, the intermediate device 3 starts the preparation work, and does not immediately send the response signal CA back to the device 2, but sends the bandwidth adjustment application signal CR to the downstream device 4, and sends the adjusted time slot number at the same time. Device 4 is a sink device. After receiving the CR signal from the upstream device 3, the sink device completes the preparation work and sends back the time slot adjustment response signal CA and the adjusted time slot number to the upstream device 3. After the intermediate device 3 receives the response signal CA from the downstream device 4, the intermediate device 3 sends back the time slot adjustment response signal CA and the adjusted time slot number to the upstream device 2. Similarly, after the intermediate device 2 receives the time slot adjustment response signal CA from the downstream device 3, the intermediate device 2 sends back the response signal CA and the adjusted time slot number to the upstream device 1. Device 1 is a source device. After the source receives the time slot adjustment response signal CA and the adjusted time slot number from the downstream, it determines that the sent back time slot number is consistent with the applied time slot number, and determines that the negotiation work between the source device and the sink device and all the intermediate devices has been completed, and the time slot adjustment negotiation between all devices is successful. In this case, the source device 1 starts to send the adjustment indication signal C to the downstream device. If the adjustment negotiation between some devices in the network is unsuccessful, the source device 1 will not receive the response signal CA, and the source device 1 will not send the adjustment indication signal C. The devices will not carry customer services according to the new number of time slots, and the devices will still carry customer services according to the original number of time slots, avoiding the problem of end-to-end bandwidth inconsistency caused by successful negotiation between some devices and unsuccessful negotiation between some devices in traditional time slot adjustment, as well as the fallback problem of time slot adjustment. If the negotiation of some devices in the network fails, and the source device cannot receive the time slot adjustment response signal, the source device can repeatedly or continuously send the time slot adjustment application signal CR until it receives the time slot adjustment response signal CA. If the source device still cannot receive the adjustment response signal CA within a certain period of time, the source device considers that the end-to-end link has failed, stops sending the time slot adjustment application signal CR, and terminates the time slot adjustment activity.

When the source device 1 receives the time slot adjustment response confirmation signal CA and the adjusted time slot number sent back by the downstream device, and determines that the sent back time slot number is consistent with the applied time slot number, the source device sends the adjustment indication signal C to the downstream device 2. At the same time, device 1 carries the customer service according to the new time slot plan. The downstream device 2 receives the adjustment indication signal C and also forwards the customer service according to the new time slot plan, completing the time slot adjustment between device 1 and device 2. When the intermediate device 2 receives the adjustment indication signal C from the upstream device 1, device 2 sends the adjustment indication signal C to the downstream device 3 at the same time. At the same time, device 2 carries the customer service according to the new time slot plan. The downstream device 3 receives the adjustment indication signal C and also forwards the customer service according to the new time slot plan, completing the time slot adjustment between device 2 and device 3. Similarly, when the intermediate device 3 receives the adjustment indication signal C from the upstream device 2, device 3 also sends the adjustment indication signal C to the downstream device 4. At the same time, device 3 carries the customer service according to the new time slot plan. The downstream device 4 receives the adjustment indication signal C and also extracts the customer service according to the new time slot plan, completing the time slot adjustment between device 3 and device 4. After the sink device completes the time slot adjustment, the end-to-end time slot adjustment work is completed. After completing the time slot adjustment, the sink device notifies the source device that the time slot adjustment is successful. If the source device does not receive the adjustment success indication signal from the sink device within a period of time, the source device can resend the adjustment indication signal C; the source device can also continuously send the adjustment indication signal C until it receives the adjustment success indication signal from the sink device and stops sending the adjustment indication signal C.

In the above scheme, the time slot adjustment negotiation is conducted end-to-end from the source device to the sink device, the intermediate devices participate in the negotiation, and the intermediate devices use a relay race to sequentially transmit the time slot adjustment negotiation signal, so as to realize the handshake negotiation mechanism between the source device and the sink device regarding the time slot adjustment. When the negotiation between the source device and the sink device is successful, it means that the negotiation between the source device and the sink device, including all the intermediate devices in the network, regarding the time slot adjustment is successful. Only after the handshake negotiation between all devices regarding the time slot adjustment is successful, the time slot adjustment work is performed sequentially starting from the source device. Regardless of whether the time slot is increased or decreased, the end-to-end time slot adjustment method in the above scheme can be used, and the time slot adjustment negotiation and execution work can be performed from the source device to the sink device. For the adjustment demand of time slot increase, before the end-to-end time slot increase adjustment is completed, the customer service bandwidth will not be increased, and the customer service bandwidth will remain the original bandwidth. In this way, even if the bandwidth between upstream devices is large and the bandwidth between downstream devices is small during the end-to-end time slot increase adjustment process, the customer service bandwidth will still maintain the original bandwidth size, and the customer service bandwidth and the bandwidth between downstream devices will be the same. Therefore, even if the upstream pipeline bandwidth is large, the effective customer service bandwidth will not increase, so there will be no customer overflow. As shown in Figure 5, only one time slot is configured to transmit customer services between device 1 and device 2, device 2 and device 3, and device 3 and device 4 at the beginning, and the customer service bandwidth that can be transmitted in one time slot is only 10M. When the bandwidth needs to be adjusted to 20M, the customer service bandwidth will still remain at 10M at the beginning. During the adjustment process, the time slots of device 1 and device 2 are initially adjusted from 1 time slot to 2 time slots, and the bearer bandwidth becomes 20M. There is still one time slot between device 2 and device 3, and device 3 and device 4, transmitting customer services at a rate of 10M. At device 1, when the 10M customer service is carried in 2 time slots, since the customer service speed is lower than the time slot speed, a large amount of idle information, such as idle code blocks, needs to be inserted between customers. After adding a large amount of idle information, the total speed is increased to 20M, and then carried in 2 time slots. At device 2, the customer flow from device 1 is received, and the large amount of idle information inserted between the messages is deleted. The remaining customer service speed can be carried in 1 time slot. Device 2 carries the customer service after deleting the idle information in one time slot and gives it to device 3. When the time slot between device 2 and device 3 is adjusted from 1 time slot to 2 time slots, device 2 does not delete the idle information when receiving the service flow of device 1, and device 3 carries it in one time slot after deleting the idle information. When the time slot between device 3 and device 4 is adjusted from 1 time slot to 2, the number of time slots of the end-to-end bearer pipe between device 1 and device 4 is adjusted to 2 time slots, carrying 20M customer services. The customer service speed is adjusted to 20M only after the end-to-end time slot number is successfully adjusted. For the adjustment of increasing the number of time slots, the time slot adjustment of the end-to-end device is completed first, and then the customer service speed is increased and adjusted. Similarly, for the adjustment of reducing the number of time slots, the customer service speed is reduced and adjusted first, and then the time slot adjustment between the end-to-end devices is performed, and the customer service speed is always kept lower than the carrying speed of any device in the carrying pipeline of the end-to-end device. For any device, when the upstream time slot bandwidth is larger than the downstream time slot bandwidth, a large amount of idle information in the upstream customer service is deleted, and then the customer service is sent to the downstream time slot; when the upstream time slot bandwidth is smaller than the downstream time slot bandwidth, a large amount of idle information is inserted into the upstream customer service, and then sent to the downstream time slot. In addition, if the intermediate node receives the adjustment indication C signal, it immediately sends an adjustment indication to the downstream, and the downstream time slot increase adjustment is also started immediately. In this way, the time slot increase adjustment starts from the source device, from the upstream device to the downstream device, and then all the devices upstream use a relay method to increase the time slot adjustment. The adjustments between the upstream and downstream devices are carried out in sequence. The phenomenon of inconsistent time slot numbers and inconsistent bandwidths between the upstream and downstream devices only exists for a moment, and then the number of time slots between the upstream and downstream devices will soon be consistent, and there will be no bandwidth inconsistency problem.

In the time slot adjustment, the source device and the sink device conduct handshake negotiation through the adjustment application signal CR and the adjustment response signal CA. The time slot negotiation handshake method can adopt the full time slot adjustment method, periodically send the adjustment application status information of all time slots, and then periodically send back the response information of all time slots. After receiving the response information of all time slots, start the adjustment and send the time slot adjustment indication signal C. Figure 6 is a schematic diagram of the time slot negotiation handshake. In Figure 6, device 1 can periodically send the time slot adjustment application status information of all time slots to device 2. After receiving, device 2 periodically forwards it to device 3. After receiving, device 3 periodically forwards it to device 4. After receiving the time slot adjustment application status information, device 4 periodically sends back the time slot adjustment response signal of all time slots to device 3. After receiving, device 3 periodically sends back the adjustment status information of all time slots to device 2. After receiving, device 2 periodically sends back the adjustment status information of all time slots to device 1. After receiving the adjustment response signal of all time slots, device 1 sends a notification start adjustment indication signal C signal to officially enable the adjusted time slot. In the full time slot adjustment mode, regardless of whether a time slot participates in the adjustment, the adjustment application status information and response information of all time slot information are periodically transmitted. Among all the time slot adjustment information, some time slots may really need to be adjusted, and some time slots do not need to participate in the adjustment. If there are 480 time slots in total, every 480 frames are used as a multiframe, and each frame in the multiframe transmits the adjustment status information of a time slot. The 0th frame transmits the adjustment status information of time slot 0, the 1st frame transmits the adjustment status information of time slot 1, and the 2nd frame transmits the adjustment status information of time slot 2. And so on, the 479th frame transmits the adjustment status information of time slot 479. After the adjustment status information of all time slots is transmitted through a multiframe cycle, in FIG6, time slots 2 and time slot 4 really participate in the time slot adjustment. The CR value of time slots 2 and time slot 4 is 1, indicating that the time slot adjustment is applied. The CR value of other time slots is 0, and they do not participate in the time slot adjustment. Since the customer numbers of time slots 2 and time slots 4 have changed from invalid numbers to valid numbers, it means that the time slot adjustment is increased. Device 1 transmits the adjustment status information of all time slots to device 2 within a multiframe period. After receiving the information, device 2 transmits the adjustment status information of all time slots to device 3 within a multiframe period. After receiving the information, device 3 transmits the adjustment status information of all time slots to device 4 within a multiframe period. After receiving the adjustment status information of all time slots, device 4 sends back the response information of all time slots to device 3. After receiving the information, device 3 sends back the response information of all time slots to device 2 within a multiframe period. After receiving the information, device 2 sends back the response information of all time slots to device 1 within a multiframe period. Device 1 receives the response information of all time slots within a multiframe period. Since only time slots 2 and time slots 4 apply to participate in the adjustment, in the response information sent back by all devices, only time slots 2 and time slots 4 respond that the CA information is valid (CA=1), and the response information of other time slots is invalid (CA=0).

After receiving all the response CA information sent back, device 1 continuously sends multiple adjustment indication C signals. In order to increase reliability, multiple adjustment indication C messages can be sent, for example, three adjustment indication C messages are sent, and the receiving end adopts the majority judgment principle (when a valid adjustment indication C signal appears two or more times, the adjustment indication C signal is judged to be valid; when an invalid adjustment indication C signal appears two or more times, the adjustment indication C signal is judged to be invalid), and then the initiating device and the receiving device adjust the number of time slots based on the agreed time reference, as shown in Figure 6, the newly added time slots 2 and 4 are officially enabled at the agreed time, and the initiating device and the receiving device both use the dotted line time as the time to enable the adjusted new time slots. In order to facilitate the activation of new time slots to carry customer services, new time slots are generally activated at the starting position of the bearer frame. If the time for activating the new time slot is in the middle of a frame, the current bearer frame will continue to carry customer services according to the original old time slot, and the new time slot will be activated to carry customer services at the beginning of the next frame. The dotted line in Figure 6 is the agreed reference time for activating new time slots between the sending device and the receiving device, but the new time slot is actually activated at the starting position of the next adjacent bearer frame. The starting position of the bearer frame (i.e., the first time slot) is used as the starting position, i.e., the bold solid line position in Figure 6. Both the sending device and the receiving device enable the new time slot to carry customer services at the bold solid line position, the starting time of the next bearer frame.

When adjusting the time slot, in order to achieve the synchronous change of the bandwidth of the customer service and the corresponding number of time slots carrying the customer service, when the bandwidth of the customer service needs to change, a time slot adjustment indication signal is inserted into the customer service flow, and the time slot adjustment indication signal is transmitted together with the service flow. The time slot adjustment indication signal has two functions, indicating the change time of the service bandwidth and indicating the time of the adjustment of the time slot carrying the customer service. The bandwidth of the customer service is changed according to the adjustment indication signal, and the number of time slots carrying the customer service is also changed according to the adjustment indication signal. The number of time slots carrying the customer service adapts to the change of the bandwidth of the customer service. The adjustment indication signal is carried in the customer service flow, and the adjustment indication signal represents the adjustment time of the service flow bandwidth. The adjustment indication signal is transmitted in the network with the service flow. When the adjustment indication signal passes through each device in the network, the device passing through adjusts the number of time slots carrying the device synchronously according to the adjustment indication carried in the customer service flow, and carries the customer service according to the new number of time slots. When the customer service bandwidth changes, the corresponding device also adjusts the number of time slots at the same time, so that the service bandwidth change and the number of time slots are basically synchronized, and the total duration due to the difference between the time of the service bandwidth change and the time slot number change is reduced.

Compared with the traditional hop-by-hop negotiation and hop-by-hop adjustment mechanism, after the end-to-end time slot adjustment negotiation is successful, the time slot adjustment activity is started by carrying the time slot adjustment indication signal through the customer service, which reduces the negotiation time, avoids the serious consequences of unsuccessful adjustment negotiation during hop-by-hop adjustment, avoids the need for fallback when the adjustment is unsuccessful, saves adjustment negotiation time, and increases the probability of successful adjustment. However, when the service bandwidth change time and the time slot number change time are different, due to the speed difference between the two, a buffer is needed to temporarily store the customer service to adapt to the speed difference between the two. The longer the difference between the service bandwidth change time and the time slot number change time lasts, the larger the amount of service that needs to be cached, and the higher the cost.

In order to reduce the duration of the asynchrony between the service bandwidth change moment and the time slot number change moment, thereby effectively reducing the number of cached services, reducing costs and customer delays, the embodiments of the present application provide a time slot adjustment method, a communication device and a computer-readable storage medium, wherein, after determining the time slot adjustment strategy with the downstream node and the host node, the first node can adopt the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, and send multiple time slot adjustment indication information to the host node through the downstream node, so that the downstream node and the host node can determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopt the corresponding time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, thereby reducing the different durations of the service bandwidth change moment and the time slot number change moment, thereby reducing the number of cached services, reducing costs and customer delays.

Based on the above analysis, the embodiments of the present application are described below in conjunction with the accompanying drawings.

Referring to FIG. 7 , FIG. 7 is a flowchart of a time slot adjustment method provided by an embodiment of the present application. The time slot adjustment method may be executed by the head node, and the steps of the time slot adjustment method may include but are not limited to steps S710 to S720.

Step S710: After the time slot adjustment strategy is determined through negotiation with the downstream node and the sink node, the time slot adjustment strategy is adopted at the time of time slot adjustment to complete the time slot adjustment.

Step S720: Send multiple time slot adjustment indication information to the sink node through the downstream node, so that the downstream node and the sink node determine the time slot adjustment time according to the multiple time slot adjustment indication information, and use the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment time.

In a feasible implementation, when the customer service is in a transmission state and time slot adjustment information needs to be inserted into the service flow, the first node can initiate an application for bandwidth increase adjustment. After the first node, the downstream node and the host node determine the time slot adjustment strategy, the time slot adjustment indication information can be sent to the host node through the downstream node, so that in the process of service flow transmission, each node can adopt the time slot adjustment strategy at the determined time slot adjustment time to complete the time slot adjustment, reduce the different durations of the service bandwidth change time and the time slot number change time, thereby reducing the number of cached services, reducing costs and customer delays.

It can be understood that the service flow can be ordinary Ethernet service information or high service quality service information. For example, the high service quality service information can be CBR service, high service quality Ethernet service information (such as eCPRI (ethernet Common Public Radio Interface) service information), voice service information, video service information, game service information, etc., which is not specifically limited here. Among them, the high service quality service information can be encapsulated in various formats, such as eCPRI protocol message format or Ethernet message format, etc.; ordinary Ethernet service information can be download service information, etc., which is not specifically limited here.

In a feasible implementation manner, the head node may also send time slot switching time information to the sink node through the downstream node, wherein the time slot switching time information is used to indicate the time slot adjustment time.

In a feasible implementation, the time slot switching time information can be carried in the time slot switching time code block in the service flow, wherein the time slot adjustment time may include one of the following three situations: the time slot adjustment time is the next time slot of the time slot where the time slot switching time code block is located; the time slot adjustment time is the starting position of the next bearer frame of the bearer frame where the time slot switching time code block is located or the first time slot; the time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching time code block is located or the first time slot of the first bearer frame in the next multiframe.

In a feasible implementation manner, the time slot adjustment indication information may be used to indicate that the time slot adjustment strategy is effective. In addition, multiple time slot adjustment indication information may also be carried in multiple time slot adjustment indication code blocks in the service flow.

In a feasible implementation, when the slot switching time information is carried in the time slot switching time code block in the service flow, there may be equal or unequal numbers of first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent.

In a feasible implementation, when the slot switching time information is carried in the slot switching time code block in the service flow, there are a first number of first code blocks between two adjacent time slot adjustment indication code blocks, and there are a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent. It should be noted that the second number is not equal to the first number.

In a feasible implementation manner, the time slot switching time code block can be determined according to the first quantity and the position of any time slot adjustment indication code block.

In a feasible implementation, the time slot switching code block corresponds to an expected position in the service flow, and the expected position can be determined based on the first quantity and the position of any time slot adjustment indication code block. When the code block corresponding to the expected position is a code block in the data message, the time slot switching code block is the first code block after the end code block in the data message.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block have the same code block type, and both the time slot adjustment indication code block and the time slot switching moment code block include a time slot adjustment function field. The time slot adjustment function field in the time slot adjustment indication code block is used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching moment code block is used to carry the time slot switching moment information.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block also include a synchronization header bit, a control word and a type sequence value, and the combination of the synchronization header bit, the control word and the type sequence value serves as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block.

In this embodiment, by adopting the time slot adjustment method including the above-mentioned steps S710 to S720, after negotiating with the downstream node and the host node to determine the time slot adjustment strategy, the first node can adopt the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, and send multiple time slot adjustment indication information to the host node through the downstream node, so that the downstream node and the host node can determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopt the corresponding time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, thereby reducing the different durations of the service bandwidth change moment and the time slot number change moment, thereby reducing the number of cached services, reducing network overhead costs and customer service delays.

In one embodiment, multiple time slot adjustment indication information may be carried in multiple time slot adjustment indication code blocks in a service flow, and the time slot adjustment moment is determined according to the position of any time slot adjustment indication code block.

In one embodiment, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time can be determined according to the time slot adjustment reference time, and the time slot adjustment reference time can be determined according to the third number and the position of any time slot adjustment indication code block.

In one embodiment, the time slot adjustment moment includes one of the following situations: the time slot adjustment moment is the next time slot of the time slot where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference moment is located or the first time slot of the first bearer frame in the next multiframe.

In one embodiment, there are a fourth number of first code blocks between the position of the time slot adjustment reference time and the last sent time slot adjustment indication code block. It should be noted that the fourth number is less than or equal to the third number.

In one embodiment, the time slot adjustment indication code block further includes a time slot adjustment function field, wherein the time slot adjustment function field can be used to carry time slot adjustment indication information.

In one embodiment, when mapping the first code block stream to the first transmission container, a plurality of time slot adjustment indication information may be carried in an OAM code block in the service stream.

In one embodiment, when the OAM code block includes an APS code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, when the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, and multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the pseudo APS code block, and the Base2 code block. S code blocks and Base2 code blocks, the time slot adjustment moment is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, when the OAM code block includes an APS code block, a pseudo APS code block may be configured before or after the APS code block, and multiple time slot adjustment indication information may be respectively carried in the Base1 code block, the pseudo APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment may be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information.

In one embodiment, when the OAM code block includes an APS code block, the APS code block may include a first APS code block and a second APS code block. In this case, the time slot adjustment indication information may be carried in the second APS code block.

In one embodiment, when the OAM code block includes an L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, when the OAM code block does not include the L code block, the position of the L code block in the OAM code block can be configured with a pseudo L code block, and multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, when the OAM code block includes the L code block, the front or back of the L code block can be configured with a pseudo L code block, and multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information.

In one embodiment, the time slot adjustment indication code block may include check bit information, wherein the check bit information may be used to check the correctness of the time slot adjustment indication information.

Figure 27 is a flowchart of a process of determining a time slot adjustment strategy through negotiation by a first node provided in an embodiment of the present application. When the first node negotiates with a downstream node and a sink node to determine a time slot adjustment strategy, as shown in Figure 27, the process of determining the time slot adjustment strategy may include but is not limited to steps S2710-S2720.

Step S2710: Sending time slot adjustment strategy information to the sink node through the downstream node, so that the downstream node and the sink node determine the time slot adjustment strategy according to the time slot adjustment strategy information.

Step S2720: when receiving the time slot adjustment strategy response information returned by the sink node through the downstream node, it is determined that the time slot adjustment strategy is determined through negotiation with the downstream node and the sink node.

In one embodiment, the time slot adjustment strategy information may include time slot adjustment application information and information to be adjusted, wherein the time slot adjustment application information is used to request time slot adjustment, and the information to be adjusted is used to determine the policy content of the time slot adjustment strategy.

The time slot adjustment method provided in the embodiment of the present application is described in detail below with reference to a specific example.

For example, as shown in FIG8, FIG8 is a schematic diagram of inserting time slot adjustment information in a service flow provided by an embodiment of the present application. In the current related art, Ethernet messages are transmitted in a code block format encoded in a fixed length, and a 66-bit length code block is commonly used. As shown in FIG8, when the customer service is in a state of transmission, a specially defined code block can be inserted into the customer service code block stream, referring to the code block with a white background in FIG8. These specially defined code blocks include a time slot adjustment indication code block and a time slot switching time code block. These specially defined code blocks can carry corresponding time slot adjustment indication information, wherein the time slot adjustment indication information includes an indication signal for time slot adjustment and an indication signal for time slot switching. In the example of FIG8, the time slot adjustment indication code block can carry three types of time slot adjustment indication signals: C1, C2 and C3. The three data values of C1, C2 and C3 are a group. C1, C2 and C3 are indication signals with the same function. These indication signals will appear three times. The majority judgment principle is adopted to avoid the scene of a single bit error and still obtain a correct judgment. It should be noted that this example uses three indication signals, and the specific implementation process can also be other times, such as five indication signals. C1, C2 and C3 represent indication signals for time slot adjustment. The three indication signals for time slot adjustment can adopt the majority judgment principle, wherein when at least two indication signals for time slot adjustment are valid, it indicates that the final judgment result of the time slot adjustment indication signal is a valid indication signal; when at least two indication signals among the three indication signals for time slot adjustment are invalid, it indicates that the final judgment result of the time slot adjustment indication is an invalid indication signal. C1, C2 and C3 can represent indication signals for time slot adjustment, and can also be used to indicate that the service bandwidth and the data of the bearer time slot are about to change, so as to realize the notification function for a period of time in the past to prepare for the work. The time slot switching code block can carry the time slot switching indication signal CCC, as shown in Figure 8. The CCC signal indicates the actual execution time of the adjustment of the service bandwidth and the number of time slots carrying customer services. When the indication signal of the time slot adjustment is valid, the bandwidth of the customer service will change at the time position of the CCC signal. When each device detects the CCC signal, the adjusted number of time slots is also enabled synchronously, so as to realize the synchronous adjustment of the number of time slots and service bandwidth.

It is worth noting that in the Ethernet standard, the o code block is a control code block, the 2-bit synchronization header bit value is "10", the control word content is "0x4B", and the 34th to 37th bit values in the code block are the o sequence values of the o code block. Different sequence values represent different types of o code blocks, as shown in the upper figure in Figure 9. The current standard has enabled the o sequence values of 0x0, 0x1, 0x2, 0x5, and 0xF, so the o code blocks carrying other sequence values can be defined as special definition code blocks carrying time slot adjustment information. As shown in the lower figure in Figure 9, the o code block with the 0xE sequence value is used as a special definition code block for the time slot adjustment indication signal.

In one embodiment, a combination of a synchronization header bit of "10", a control word of "0x4B", and an o sequence value of "0xE" can be used as a flag value for a code block carrying a time slot adjustment indication, and a code block that meets the flag value is a code block carrying time slot adjustment indication information. The first byte in the o code block is the control word. In FIG9 , there are three bytes (D2, D3, and D4) after the control word, which are data bytes. The meaning of the data byte content is determined according to the type of the o code block sequence value. When the sequence value of the o code block is defined as a code block carrying a time slot adjustment indication, the three bytes D2, D3, and D4 can carry time slot adjustment indication information, such as C1 function information, C2 function information, C3 function information, and CCC function information. In the lower figure of FIG9 , D2 content 00 indicates a code block of time slot adjustment indication information of the C1 function, D2 content 01 indicates a code block of time slot adjustment indication information of the C2 function, D2 content 10 indicates a code block of time slot adjustment indication information of the C3 function, and D2 content 11 indicates a code block of time slot adjustment indication information of the CCC function. In a specific implementation, the D2 byte content can also use other values to represent the C1, C2, C3, and CCC function information. Of course, in addition to the D2 byte being able to carry the function information value, it can also be carried by the D3 byte or by the D4 byte.

In one embodiment, as shown in FIG5 , the source device can act as the head node, device 2 and device 3 can act as the intermediate nodes, and device 4 can act as the tail node. When the time slot needs to be increased, the source device can initiate a bandwidth increase adjustment application. Specifically, the source device carries the adjustment application signal CR and the corresponding time slot slot through a bearer frame and sends it to device 2. Device 2 is an intermediate device and can receive the application signal CR and the corresponding time slot slot. After device 2 determines and permits, device 2 can forward the application signal CR and the corresponding time slot slot to device 3. It can be understood that device 3 is also an intermediate device and can receive the application signal CR and the corresponding time slot slot. After device 3 determines and permits, device 3 can forward the application signal CR and the corresponding time slot slot to device 4. It should be noted that device 4 is a sink device, which can receive the application signal CR and the corresponding time slot. After device 4 determines and authorizes, device 4 can send back a response signal CA and the corresponding time slot to device 3. Device 3 can receive the response signal CA and the corresponding time slot sent back by device 4, and send back the response signal CA and the corresponding time slot to device 2 after determination. Device 2 can receive the response signal CA and the corresponding time slot sent back by device 3, and send back the response signal CA and the corresponding time slot to source device 1 after determination. After source device 1 receives the response information CA and the time slot sent back by device 2, it determines that all adjusted time slots have received the response CA information. The source device inserts a special definition code block carrying the time slot adjustment indication into the service flow, sends three special definition code blocks carrying the time slot adjustment indication C1, C2, and C3 values respectively, and sends the special definition code block and the service flow code block together to device 2. Thereafter, source device 1 can insert a special definition code block carrying the time slot switching time indication CCC value at the agreed time, and correspondingly increase and adjust the bandwidth of the customer service flow. After the source device 1 sends the special definition code block carrying the switching moment indication signal CCC value, the number of time slots carrying the customer service is correspondingly increased. The receiving side of the device 2 can detect the type of code block in the customer service during the process of receiving the customer service. If the special definition code block carrying the time slot adjustment indication C1, C2, C3 values is detected in the customer service code block stream, according to the majority judgment principle, it is judged that the final value of the time slot adjustment indication is a valid indication, and the time slot adjustment preparation is done. The special definition code block carrying the time slot switching moment indication CCC value in the customer service stream is continued to be detected. The receiving side of the device 2 also increases the number of time slots at the same time when the special definition code block position carrying the time slot switching moment indication CCC value is detected, and the customer service can be extracted at the new number of time slots. When the customer service code block stream is transmitted to the transmitting end of the device 2, the transmitting end of the device 2 can be ready to implement the adjustment when the special definition code block carrying the time slot adjustment indication C1, C2, C3 values is detected. When the special definition code block carrying the time slot switching moment indication CCC value is detected, the transmitting end of the device 2 can also adjust the number of time slots at the same time. When the service flow is transmitted to the receiving end of device 3, the receiving end of device 3 can adopt the same operation method as the receiving end of device 2. Similarly, the transmitting end of device 3 and the receiving end of device 4 can be operated in the same way. After the receiving end of device 4 completes the time slot adjustment work, the adjustment work of the number of bearer time slots from device 1 to device 4 can be realized. At this point, the time slot adjustment work is completed.

It is worth noting that in actual applications, the customer service flow can be in the form of a code block flow. The customer's code block can be mapped to the time slot selected in the bearer frame in Figure 1 for carrying. The customer service code block flow is only carried on the corresponding selected time slot in the bearer frame. For example, the customer originally only carried services on time slots 3 and time slots 15. After the adjustment, the selected bearer frame carries services on time slots 3, 8 and 15. The bandwidth adjustment this time is to add time slot 8. After the adjustment, the customer service is carried on time slots 3, 8 and 15. In this way, the customer service code block flow carries a time slot adjustment indication special definition code block that appears in one of the time slots 3 and 8 in the bearer frame, but it is not certain whether it appears in time slot 3 or time slot 8 this time. As shown in Figure 10, the time slot adjustment indication special definition code block can appear at a certain time in the middle of the bearer frame. For the time slot adjustment indication code blocks carrying the time slot adjustment indication C1, C2, and C3 values, the receiving side only detects these three specially defined code blocks in the service code block stream. After detecting the code blocks of these three time slot adjustment indications, the final adjustment indication validity result can be given according to the majority judgment principle. It can be understood that the different positions of these three time slot adjustment indication code blocks in the bearer frame do not affect the decision result. The time slot switching time code block carrying the time slot switching time indication CCC value may also appear in any time slot carrying customer services. In Figure 10, the time slot switching time code block carrying the time slot switching time indication CCC value may appear in time slot 3. At this time, time slot 3 becomes the reference time point for adjusting the number of time slots. With time slot 3 as the reference time point, the next time slot (i.e., time slot 4) starts to carry customer services and becomes time slot 3, time slot 8, and time slot 15 to carry customer services (previously carried by time slot 3 and time slot 15), as shown in Figure 10. In the application of this example, although the time slots carrying customer services are replaced by time slots 3, time slots 15 to time slots 3, time slots 8 and time slots 15 starting from time slot 4, time slots 4, time slots 5, time slots 6 and time slots 7 do not belong to the time slots carrying this customer. Therefore, time slots 4, time slots 5, time slots 6 and time slots 7 do not carry this customer's services. In actual applications, this is also possible. As shown in Figure 11, after time slot 3, the next valid time slot carrying this customer can be time slot 8, or time slot 8 can be used as a reference time point to switch to a new time slot number starting from time slot 8. In this frame, starting from time slot 8, the original combination of time slots 3 and time slots 15 for carrying customer services is changed to a combination of time slots 3, time slots 8 and time slots 15 for carrying customer services. In specific applications, in addition to the next time slot position after the time slot switching time code block carrying the time slot switching time indication CCC value can be used as the reference time point to start the time slot adjustment result, the starting position of the next bearer frame after the time slot switching time code block carrying the time slot switching time indication CCC value (i.e., the first time slot of the next bearer frame) can also be used as the reference time point to start the time slot adjustment, as shown in Figure 12, the bearer customer service can be replaced from the combination of time slot 3 and time slot 15 to the combination of time slot 3, time slot 8 and time slot 15. In practical applications, as shown in Figure 13, the starting position of the first bearer frame in the multiframe of the next bearer frame after the time slot switching time code block carrying the time slot switching time indication CCC value (i.e., the first time slot of the first frame in the next multiframe) can also be used as the reference time point to start the time slot adjustment, and the bearer customer service can be replaced from time slot 3 and time slot 15 to time slot 3, time slot 8 and time slot 15.

In one embodiment, multiple special definition code blocks carrying time slot adjustment indications can be inserted into the service flow, and these special definition code blocks are transmitted together with the service flow code blocks. Multiple special definition code blocks can be sent at a fixed period (T), as shown in FIG14, and a fixed number of client code blocks are spaced between the special definition code blocks. After the special definition code blocks carrying the time slot adjustment indication are sent at a fixed period (T), the positions of other special definition code blocks can be known through any special definition code block. For example, the positions of the special definition code blocks carrying the time slot adjustment indication C1 value can be predicted through the positions of the special definition code blocks carrying the time slot adjustment indication C2, C3, and the time slot switching moment indication CCC value. The positions of the special definition code blocks carrying the CCC value can also be predicted through any of the special definition code blocks C1, C2, and C3. Since the special definition code block of the CCC value only serves as the reference time point for time slot adjustment, it is only a time point. When the specific position of the special definition code block of the CCC value can be predicted, the reference time point can be known, and the special definition code block does not need to exist in reality. The special definition code block carrying the CCC value can be omitted, and the fixed number of customer code block positions (the number of customer service code blocks in the T cycle length) after the code block position carrying the time slot adjustment indication C3 is used as the reference time point for time slot adjustment, as shown in Figure 14. The special definition code block carrying the time slot switching time indication CCC value in Figure 14 is white, indicating that the code block does not exist, and is only virtually presented in Figure 14. The agreed reference time point is set in advance, and the reference time point for time slot adjustment can be determined by carrying the special definition code blocks such as the time slot adjustment indication C1, C2, and C3. The real code block carrying the time slot switching time indication signal CCC is no longer needed, reducing the bandwidth loss caused by inserting the code block. In practical applications, the intervals between special definition code blocks carrying time slot adjustment indications C1, C2, C3, etc. can be the same T1 value, and the intervals between time slot switching time code blocks carrying time slot switching indications CCC, etc. and time slot adjustment indication code blocks carrying time slot adjustment indications C3, etc. can be another T2 value, as shown in FIG15 , T2 value can be a smaller value, so as to execute the time slot adjustment earlier. Whether it is a T1 interval value, or multiple interval values such as T1, T2, etc., these are within the protection scope of this application.

In actual applications, since the length of customer messages is random and uncertain, sometimes long messages are encountered and sometimes short messages are encountered. In the scenario where special definition code blocks are not allowed to be inserted in the middle of the message, when time slot adjustment indication code blocks carrying time slot adjustment indications C1, C2, C3, etc. are inserted at fixed intervals, the expected insertion positions of these code blocks may be located in the middle of the message. In this case, the special definition code blocks can only be inserted after the current message is transmitted. As shown in Figure 16, special definition code blocks carrying time slot adjustment indications C1, C2, C3, etc. can be inserted and sent at equal intervals, and the expected position of the special definition code block indicated by the time slot adjustment indication C3 can be located in the middle of the message, but the code block cannot be inserted immediately in time. It needs to be inserted after the message transmission is completed, otherwise the actual position of the special definition code block indicated by the time slot adjustment indication C3 will be inconsistent with the expected position. In actual applications, when a special definition code block is detected at an expected position, if the expected position is one of the three code blocks of a customer message (the message code blocks include S code blocks, D code blocks, and T code blocks), the actual position of the special definition code block is after the end code block T of the message. For the omitted special definition code block carrying the time slot switching moment indication CCC information, since no real code block is inserted, the position is always determined according to the expected position, and the reference time point of the time slot adjustment (i.e., the expected position of the special definition code block carrying the time slot adjustment indication CCC information) is determined by the expected position of the special definition code block carrying the time slot adjustment indication C1, C2, C3 and the code block interval value, see Figure 16, the adjustment reference time point is calculated according to the special definition code block carrying the time slot adjustment indication C1, C2, C3 and the like, at a D code block position, and the time slot adjustment can be performed starting from the D code block position. In practical applications, in order to facilitate the adjustment of customer service speed, generally, the speed of customer service is changed after the current message ends and at the starting position of the next message, and the customer service speed is not changed at the D code block position in the message. In specific applications, although the adjustment reference time point is calculated to be at the D code block position of the message, when the time slot adjustment is actually performed, the adjustment reference time point calculated at the D code block position (in addition to the D code block, it also includes the three types of code blocks of the customer message that may be at the S code block, T code block position, etc.) can be modified to the first code block after the T code block at the end of the message, as shown in Figure 16, and the execution time of the first code block after the T code block of the current message is used as the adjusted time point. The corrected adjustment time point is the real time slot adjustment execution time.

It is worth noting that in order to monitor the service quality of the customer service bearer pipe in the application, OAM code blocks are usually inserted into the customer service flow. The service quality of the bearer pipe can be determined by monitoring the information status in the OAM code blocks. The format and types of OAM code blocks are defined in the MTN standard released by the International Telecommunication Union (ITU). OAM code blocks are a specially defined 66-bit length o code block, and the o sequence value is 0xC, that is, the code block characteristic value is composed of: synchronization header bit "10" + control word 0x4B + o sequence value 0xC. Among them, there are many types of OAM code blocks, which are divided into three categories: Base code blocks, APS code blocks, and L code blocks. Base code blocks are basic function code blocks, single code block structures, and can be divided into two subclasses, Base1 and Base2, referred to as B1 and B2 code blocks; APS code blocks are protection code blocks, multi-code block structures, and are composed of two code blocks; L code blocks are low-priority code blocks, which are divided into several subclasses such as CV, CS, 1DM, and 2DM. Some subclasses of low-priority code blocks are single-code block structures, and some subclasses of low-priority code blocks are structures composed of multiple code blocks. OAM code blocks can be sent at equal intervals and fixed order according to period T. As shown in Figure 17, the order relationship of B1, A, B2, and L can be a small order cycle, and every 64 small cycle sequences form a large cycle sequence. In the L code block position of each small cycle in the large cycle, the L position of the 1st to 17th small cycles can be a CV code block, the L code block position of the 18th small cycle can be a CS code block, the L code block position of the 19th to 31st small cycles can be a 1DM/2DM code block, and the L code block position of the 32nd to 64th small cycles can be a reserved position. The currently defined reserved position is vacant and no L code block is sent. Referring to FIG. 18, in the application, B1, A, B2, and L code blocks can be OAM code blocks defined by existing standards. The functions of these OAM code blocks can be expanded so that they have the dual functions of carrying C1, C2, C3 and other indication information at the same time. As shown in FIG. 18, the B1 code block carries C1 indication information at the same time, the A code block carries C2 indication information at the same time, and the B2 code block carries C3 indication information at the same time, and the B1 code block of the next small cycle is used as the time slot switching reference time point position for carrying the CCC indication information function, so that the indication information of lossless bandwidth adjustment and the switching time indication function can be realized through the existing OAM code blocks.

It is understandable that, in the standard definition, the APS code block can be sent only when the customer enables the APS protection function. If the APS protocol and function are not enabled in the customer application, the corresponding position is vacant and the APS code block is not sent.

In one embodiment, the L code block is not sent at the L code block position in the 32nd to 64th B1, A, B2, L small cycles. In this case, a specially defined code block needs to be sent at the APS code block position, which is called a pseudo APS code block (or pseudo A code block, or C2 code block). In this way, the sent OAM sequence becomes the format in Figure 19. The three code blocks B1, pseudo A, and B2 can transmit C1, C2, and C3 indication adjustment indication signals, and the B1 code block position of the next small cycle is used as the agreed time slot adjustment reference time point. When the sending of APS code blocks is not enabled, it is necessary to send a pseudo APS code block, or a specially defined C2 indication code block, together with the B1 and B2 code blocks. In practical applications, in addition to transmitting C1, C2, and C3 indication signals through the three code blocks B1, A, and B2, C1, C2, and C3 indication signals can also be transmitted through the three code blocks B1, B2, and L. The L code block function is extended so that the L code block can carry C3 adjustment indication information. As shown in FIG20 , when the L code block is vacant, a pseudo L code block (also called a C3 code block) can be sent to carry C3 adjustment flag information.

It is worth noting that the OAM code block formulated by the ITU international standard is a 66-bit code block, which is an extension of the o code block in the Ethernet standard. The o code block with the o sequence value selected as 0xC is defined as the OAM code block. The specific format is shown in Table 1 below:

Table 1 Format of OAM code block with newly defined o sequence value

It can be seen that the OAM code block synchronization header bit is "10", the code block control word value is 0x4B, and the o sequence value is 0xC. The combination of the SoM bit and the EoM bit can be used to indicate the composition order of multiple code blocks and distinguish the first block, middle block and tail block in multiple code blocks. The specific definition is shown in Table 2:

Table 2 Definition of the combination relationship between SoM bit and EoM bit

Among them, the type field in the OAM code block is used to indicate the type of OAM code block, such as Base code block (B code block for short), APS code block (A code block for short), L code block (low priority code block, such as CV code block, CS code block, 1DM, etc.). The value1 and value2 fields can be used to carry the specific information content of the OAM code block. The Base code block is divided into two subcategories, B1 and B2 (i.e., Base1 code block and Base2 code block). The contents of the two B code blocks are the same, but they are divided into B1 and B2 subcategories because of their different positions in the order relationship of B1 (i.e., Base1 code block), A (i.e., APS code block), B2 (i.e., Base2 code block), and L (i.e., L code block). B1 is located in front of the adjacent position of the A code block, and B2 is located behind the adjacent position of the A code block. The specific structure of the B code block is shown in Table 3:

Table 3 Specific structure of B code block

Among them, the positions of bit 18, bit 19, and bit 20 in the B code block are represented by res, indicating that these positions have not been enabled and are reserved information. Any one of the bits can be enabled as a time slot adjustment indication C information function, see Table 5, and the 21st bit can be enabled as a time slot adjustment indication C information function. The B1 code block and the B2 code block can represent the time slot adjustment indication C1 and C3 information, or represent the time slot adjustment indication C1 and C2 information. The definition of the B code block is shown in Table 4:

Table 4 adds the B code block definition of time slot adjustment indication C information

In addition, the APS code block consists of two code block sequences (referred to as A1 code block and A2 code block), each code block can carry 2 bytes of content, and the two code blocks have a total of 4 bytes to form the APS protocol content. The APS format is shown in Table 5:

Table 5 APS format table

Among them, in the second code block of the APS code block sequence group, 4 bits are reserved and not enabled. Any bit can be enabled as a bearer time slot adjustment indication C2 information function. See Table 6. 21 bits can be enabled as a bearer time slot adjustment indication C2 information function. The APS code block structure after the new function is extended is shown in Table 6:

Table 6 APS code block structure table after extending new functions

Since only the second APS code block (A2 code block) has a reserved field to be expanded to carry the time slot adjustment indication information, as shown in FIG21, in the application, only the second APS code block (A2) and the previous B1 code block and the next B2 code block can be selected to combine and transmit the three bits of information C1, C2, and C3 of the time slot adjustment indication, that is, the small cycle of B1, A2, B2, and L is selected to transmit the time slot adjustment indication, and the A code block in the small cycle of B1, A1, B2, and L cannot transmit the time slot adjustment indication information because there is no extended bit. It should be noted that if the time slot adjustment indication needs to be transmitted in the small cycle of B1, A1, B2, and L due to time constraints, as shown in FIG22, a special definition code block, such as a C2 code block (or pseudo A code block), can be inserted after (or before) the A code block, which is dedicated to supplement the transmission of a time slot adjustment indication. The SoM and EoM values in a normal A code block are "10" or "01". The pseudo code block can use the same A code block format, but the SoM and EoM values are "11" to distinguish the A code block that transmits the APS protocol, as shown in Table 7:

Table 7 Format of pseudo code block

When it is detected that the format of the code block is the type value of the A code block, but the SoM and EoM values are "11", it can be determined that the code block is a pseudo A code block, and the pseudo A code block can be used to transmit the time slot adjustment indication C2 information. In addition to the above-mentioned use of the type value of the A code block to express the format of the pseudo A code block, other different type values can also be used to identify the function of the pseudo A code block or C2 code block. Similarly, when the B code block is not extended to carry the information of the time slot adjustment indication C1, C2, C3, the code block carrying the time slot adjustment indication C1, C2, C3 can also be sent by inserting a pseudo B code block separately. It should be noted that these are all within the scope of this application.

It is worth noting that, similar to the APS code block, the CV code block, CS code block, 1DM code block, 2DM code block, etc. in the L code block also have reserved bits, and any reserved bit can be enabled as a function of carrying time slot adjustment indication information.

In one embodiment, when there is no L code block position, a pseudo L code block (or C3 code block) may be sent separately to carry the time slot adjustment indication information. When there is no reserved bit in the L code block in the current B1, A, B2, L cycle to extend the transmission of the time slot adjustment indication, a special definition code block, such as a C3 code block, may be inserted before or after the L code block to supplement the transmission of a time slot adjustment indication.

In one embodiment, the OAM code blocks can be sent in a fixed order with equal intervals according to the period T. B1, A, B2, and L are a small sequential cycle, and every 64 small cycles form a large cycle. In the L code block position of each small cycle, the L position of the 1st to 17th small cycles is a CV code block, the 18th is a CS code block, the 19th to 31st is a 1DM/2DM code block, and the 32nd to 64th is a reserved position. The currently defined reserved position is vacant and no L code block is sent. A specially defined pseudo L code block (such as an LC code block) can be sent at the L code block position in the 32nd to 64th small cycle period to transmit the time slot adjustment indication. Referring to Figure 23, as shown in Figure 23, a specially defined pseudo L code block (called an LC code block) can be selected to transmit the time slot adjustment indication at the L code block position in the 32nd, 33rd, and 34th small cycle periods, and the B1 code block of the next small cycle period (the 35th small cycle) is used as the reference base time for the time slot adjustment execution. In practical applications, you can also select the L code block position in the 33rd, 34th, and 35th small cycle periods to send a specially defined pseudo L code block. It should be noted that these are all within the scope of this application.

In the aforementioned embodiment, the time slot adjustment indication information is transmitted multiple times, and the majority judgment result is used as the final result of the adjustment indication information. The majority judgment principle can redundancy certain transmission information errors, and will not cause wrong judgment results due to a small amount of information errors. For example, the majority judgment principle of three transmissions can tolerate any one of the transmission errors, and the majority judgment principle of five transmissions can tolerate any two of the transmission errors. The majority judgment principle requires multiple transmissions of information. There is another method to improve error tolerance in the application, such as adding a check bit to each transmitted information, which can determine whether the single transmission information is correct. There are 3 reserved bits in the B code block, and any two of them can be used to transmit the adjustment indication information. Any two bits are combined to determine whether the adjustment bit information is correct. As shown in Table 8, the C bit is the adjustment indication information, and the bip is the check bit for the C bit, which can use even parity or odd parity. When using even parity, when the value of C is 1, the value of BIP is also 1; when the value of C is 0, the value of BIP is also 0. There is a fixed relationship between the value 1 of C and the value of BIP, and the two can only be "11" or "00". In the scenario of a single bit error, when the C bit value and the BIP bit value become "10" or "01", these two values are error results, so it is known that the C bit may be wrong. The use of the time slot adjustment indication information with a check function does not require three or five transmissions, but only two transmissions. In the case of a bit error, only one information error will occur. In this way, even if there is an error, another value is correct and available. As shown in Figure 24, the time slot adjustment indication information with a check function is carried on the code blocks of B1 and B2. When the check bit BIP value and C value in any B code block are combined to determine that the corresponding C value is correct, the determined C value is the final time slot adjustment indication information. In Figure 24, the time slot adjustment indication information with a check function is carried only on the code blocks of B1 and B2, and the next B code block is used as the reference time point for the time slot adjustment.

Table 8 B code block format table

In the above embodiment, when performing end-to-end time slot adjustment, the source device starts to send a time slot adjustment application. The time slot numbers adjusted between the source device, the intermediate network device and the host device can be exactly the same. In this way, the intermediate network device only needs to forward the time slot adjustment application signal, the time slot number and the time slot adjustment response signal to realize the end-to-end time slot adjustment handshake negotiation process. In actual applications, since the time slot content configured by each node device may be different, the remaining time slot numbers between devices may be inconsistent. It is only necessary to ensure that the number of adjusted time slots is consistent between two adjacent nodes, and the time slot positions and time slot names do not need to be completely consistent. As shown in Figure 25, time slot 2 and idle time slot 3 can be selected for adjustment between the source device 1 and the downstream device 2, time slot 5 and time slot 8 can be selected for adjustment between the selected device 2 and the device 3, and time slot 1 and time slot 7 can be selected between the device 3 and the device 4. In this way, the application signal CR, the response signal CA and the corresponding adjustment time slot number between each adjacent device can be associated with each other and correspond one-to-one with the corresponding adjustment time slot. When the source node sends the adjustment indication signal C, the adjustment indication signal may also be transmitted to each device in the corresponding valid adjustment time slot.

In one embodiment, after the source device sends the CR valid information under normal circumstances, the intermediate device can parse the received CR valid information and forward it to the downstream device, and forward it to the destination device. In some special or abnormal circumstances, the intermediate or destination device may determine that the time slot adjustment requirement cannot be met based on the number of time slots applied, and the time slot adjustment application is rejected. As shown in Figure 26, when the source device applies to add 10 time slots, there are enough idle time slots between device 1 and device 2 to meet the requirements, and there are enough idle time slots between device 2 and device 3 to meet the requirements, and the adjustment application can continue to be forwarded, but there are not enough idle time slots between device 3 and device 4 to meet the increase in adjustment, and device 3 cannot continue to forward the time slot adjustment application information to device 4, and the time slot adjustment application will be rejected. At this time, device 3 can directly send back the adjustment failure response signal CA_fail signal to the upstream device, and does not allocate the application time slot planned by device 2. After receiving the feedback adjustment failure response signal CA_fail, device 2 cancels the applied time slot and continues to send it back to the upstream device 1. After receiving the feedback adjustment failure response signal CA_fail, device 1 determines that the time slot adjustment application has failed, withdraws the applied time slot adjustment application content, and cancels the applied adjustment time slot operation, thus completing the withdrawal process of the time slot application.

In the aforementioned embodiment, the customer number of the corresponding time slot can be changed from an invalid number to a valid number, indicating that the corresponding time slot is added, and the customer number of the corresponding time slot can be changed from a valid number to an invalid number, indicating that the corresponding time slot is deleted or reduced. In actual applications, in addition to the change in the customer number indicating the application for adding or deleting the time slot, it can also be expressed in other ways. For example, an overhead indication bit is set to indicate the increase indication signal and the deletion indication signal of each time slot, and the increase indication signal and the deletion indication signal are directly used to indicate whether each time slot is applying for an increase adjustment or a deletion adjustment. It should be noted that different indication methods are within the scope of this application.

Referring to Figure 28, Figure 28 is a flowchart of a time slot adjustment method provided by another embodiment of the present application. The time slot adjustment method can be executed by an intermediate node, and the time slot adjustment method can include but is not limited to steps S2810 to S2820.

Step S2810: after determining the time slot adjustment strategy through negotiation with the upstream node and the downstream node, upon receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment moment according to the multiple time slot adjustment indication information, and completing the time slot adjustment by adopting the time slot adjustment strategy at the time slot adjustment moment;

Step S2820: sending multiple time slot adjustment indication information to the downstream node, so that the downstream node determines the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopts the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment.

In a feasible implementation, when a customer service is in a transmission state and time slot adjustment information needs to be inserted into the service flow, after the intermediate node determines the time slot adjustment strategy with the upstream node and the downstream node, the intermediate node can receive the time slot adjustment indication information sent by the upstream node and send the time slot adjustment indication information to the downstream node, so that in the process of service flow transmission, each node can adopt the time slot adjustment strategy to complete the time slot adjustment at the determined time slot adjustment moment, reduce the different durations of the service bandwidth change moment and the time slot number change moment, thereby reducing the number of cached services, reducing costs and customer delays.

In a feasible implementation, after the intermediate node negotiates with the upstream node and the downstream node to determine the time slot adjustment strategy, the intermediate node can also receive the time slot switching time information sent by the upstream node, where the time slot switching time information is used to indicate the time slot adjustment time, and then send the time slot switching time information to the downstream node.

In a feasible implementation, the time slot switching time information can be carried in the time slot switching time code block in the service flow, and the time slot adjustment time can include one of the following situations: the time slot adjustment time is the next time slot of the time slot where the time slot switching time code block is located; the time slot adjustment time is the starting position of the next bearer frame of the bearer frame where the time slot switching time code block is located or the first time slot; the time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching time code block is located or the first time slot of the first bearer frame in the next multiframe.

In a feasible implementation manner, the time slot adjustment indication information may be used to indicate that the time slot adjustment strategy is effective. In addition, multiple time slot adjustment indication information may be carried in multiple time slot adjustment indication code blocks in the service flow.

In a feasible implementation, the time slot switching time information can be carried in the time slot switching time code block in the service flow, and there can be equal or unequal numbers of first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent.

In a feasible implementation, when the slot switching time information is carried in the slot switching time code block in the service flow, there are a first number of first code blocks between two adjacent time slot adjustment indication code blocks, and there are a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent. It should be noted that the second number is not equal to the first number.

In a feasible implementation manner, the time slot switching time code block can be determined according to the first quantity and the position of any time slot adjustment indication code block.

In a feasible implementation, the time slot switching code block corresponds to an expected position in the service flow, and the expected position can be determined based on the first quantity and the position of any time slot adjustment indication code block. When the code block corresponding to the expected position is a code block in a data message, the time slot switching code block is the first code block after the end code block in the data message.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block can have the same code block type, and the time slot adjustment indication code block and the time slot switching moment code block can both include a time slot adjustment function field, and the time slot adjustment function field in the time slot adjustment indication code block can be used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching moment code block can be used to carry the time slot switching moment information.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block may also include a synchronization header bit, a control word and a type sequence value, wherein the combination of the synchronization header bit, the control word and the type sequence value may be used as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block.

In this embodiment, by adopting the time slot adjustment method including the above-mentioned steps S2810 to S2820, after the intermediate node negotiates with the upstream node and the downstream node to determine the time slot adjustment strategy, when the intermediate node receives multiple time slot adjustment indication information sent by the upstream node, it can determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopt the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment. By sending multiple time slot adjustment indication information to the downstream node, the downstream node can determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopt the corresponding time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment. Therefore, the different durations of the service bandwidth change moment and the time slot number change moment can be reduced, thereby reducing the number of cached services, reducing network overhead costs and customer service delays.

In one embodiment, multiple time slot adjustment indication information may be carried in multiple time slot adjustment indication code blocks in a service flow, and the time slot adjustment moment may be determined according to the position of any time slot adjustment indication code block.

In one embodiment, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time can be determined according to the time slot adjustment reference time, and the time slot adjustment reference time can be determined according to the third number and the position of any time slot adjustment indication code block.

In one embodiment, the time slot adjustment moment may include one of the following situations: the time slot adjustment moment is the next time slot of the time slot where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference moment is located or the first time slot of the first bearer frame in the next multiframe.

In one embodiment, there are a fourth number of first code blocks between the position of the time slot adjustment reference time and the last sent time slot adjustment indication code block. It should be noted that the fourth number is less than or equal to the third number.

In one embodiment, the time slot adjustment indication code block may further include a time slot adjustment function field, wherein the time slot adjustment function field is used to carry time slot adjustment indication information.

In one embodiment, multiple time slot adjustment indication information may be carried in an OAM code block in a service flow.

In one embodiment, when the OAM code block includes an APS code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, when the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, and multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the pseudo APS code block, and the Base2 code block. For an OAM code block, an S code block and a Base2 code block, the time slot adjustment moment may be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, when the OAM code block includes an APS code block, a pseudo-APS code block is configured before or after the APS code block, and multiple time slot adjustment indication information may be respectively carried in the Base1 code block, the pseudo-APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment may be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information.

In one embodiment, when the OAM code block includes an APS code block, the APS code block includes a first APS code block and a second APS code block, and the time slot adjustment indication information may be carried in the second APS code block.

In a feasible implementation manner, when the OAM code block includes an L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, when the OAM code block does not include the L code block, the position of the L code block in the OAM code block is configured with a pseudo L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, when the OAM code block includes the L code block, the pseudo L code block is configured before or after the L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information.

In one embodiment, the time slot adjustment indication code block may further include check bit information, and the check bit information may be used to check the correctness of the time slot adjustment indication information.

In one embodiment, after the intermediate node receives multiple time slot adjustment indication information sent by the upstream node, it can first determine the validity of each time slot adjustment indication information. When the number of valid time slot adjustment indication information is greater than the number of invalid time slot adjustment indication information, it is determined that the time slot adjustment strategy is effective.

In one embodiment, see FIG. 29, which is a flowchart of a process of an intermediate node negotiating and determining a time slot adjustment strategy provided by an embodiment of the present application. When the intermediate node negotiates with the upstream node and the downstream node to determine the time slot adjustment strategy, as shown in FIG. 29, the process of determining the time slot adjustment strategy may include but is not limited to steps S2910-step S2940:

Step S2910: receiving the time slot adjustment strategy information sent by the upstream node, and determining the time slot adjustment strategy according to the time slot adjustment strategy information;

Step S2920: sending the time slot adjustment strategy information to the downstream node, so that the downstream node determines the time slot adjustment strategy according to the time slot adjustment strategy information;

Step S2930: upon receiving the time slot adjustment strategy response information returned by the downstream node, determining that the time slot adjustment strategy has been determined through negotiation with the downstream node;

Step S2940: forwarding the time slot adjustment strategy response information to the upstream node, so that the upstream node determines that the time slot adjustment strategy has been determined through negotiation.

In one embodiment, the time slot adjustment strategy information may further include time slot adjustment application information and information to be adjusted, wherein the time slot adjustment application information may be used to request time slot adjustment, and the information to be adjusted may be used to determine the policy content of the time slot adjustment strategy.

It should be noted that in the time slot adjustment method performed by the intermediate node provided in the embodiment of the present application, the relevant structural description of the OAM code blocks involved, as well as the description of the time slot adjustment process completed by the intermediate node interacting with the upstream node and the downstream node, can refer to the relevant description content in the previous embodiments. In order to avoid redundant content, it will not be repeated here.

Referring to Figure 30, Figure 30 is a flowchart of a time slot adjustment method provided by another embodiment of the present application. The time slot adjustment method can be executed by the tail node, and the time slot adjustment method can include but is not limited to steps S3010 to S3020.

Step S3010: after determining the time slot adjustment strategy through negotiation with the upstream node, upon receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment moment according to the multiple time slot adjustment indication information;

Step S3020: At the time of time slot adjustment, the time slot adjustment strategy is adopted to complete the time slot adjustment.

In a feasible implementation, when a customer service is in a transmission state and time slot adjustment information needs to be inserted into the service flow, after the tail node and the upstream node determine the time slot adjustment strategy, the tail node can receive the time slot adjustment indication information sent by the upstream node, so that in the process of service flow transmission, each node can adopt the time slot adjustment strategy at the determined time slot adjustment moment to complete the time slot adjustment, thereby reducing the different durations of the service bandwidth change moment and the time slot number change moment, thereby reducing the number of cached services, reducing costs and customer delays.

In a feasible implementation, after the tail node negotiates with the upstream node to determine the time slot adjustment strategy, it may also receive time slot switching time information sent by the upstream node, wherein the time slot switching time information is used to indicate the time slot adjustment time.

In a feasible implementation, the time slot switching time information can be carried in the time slot switching time code block in the service flow, and the time slot adjustment time can include one of the following situations: the time slot adjustment time is the next time slot of the time slot where the time slot switching time code block is located; the time slot adjustment time is the starting position of the next bearer frame of the bearer frame where the time slot switching time code block is located or the first time slot; the time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching time code block is located or the first time slot of the first bearer frame in the next multiframe.

In a feasible implementation manner, the time slot adjustment indication information may also be used to indicate that the time slot adjustment strategy is effective, and multiple time slot adjustment indication information may be carried in multiple time slot adjustment indication code blocks in the service flow.

In a feasible implementation, the time slot switching time information can be carried in the time slot switching time code block in the service flow, and there can be equal or unequal numbers of first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent.

In a feasible implementation, when the slot switching time information is carried in the slot switching time code block in the service flow, there are a first number of first code blocks between two adjacent time slot adjustment indication code blocks, and there are a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent. It should be noted that the second number is not equal to the first number.

In a feasible implementation manner, the time slot switching time code block can be determined according to the first quantity and the position of any time slot adjustment indication code block.

In a feasible implementation, the time slot switching code block corresponds to an expected position in the service flow, and the expected position can be determined based on the first quantity and the position of any time slot adjustment indication code block. When the code block corresponding to the expected position is a code block in a data message, the time slot switching code block is the first code block after the end code block in the data message.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block can have the same code block type, and the time slot adjustment indication code block and the time slot switching moment code block can both include a time slot adjustment function field, and the time slot adjustment function field in the time slot adjustment indication code block can be used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching moment code block can be used to carry the time slot switching moment information.

In a feasible implementation, the time slot adjustment indication code block and the time slot switching moment code block also include a synchronization header bit, a control word and a type sequence value, wherein the combination of the synchronization header bit, the control word and the type sequence value serves as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block.

In this embodiment, by adopting the time slot adjustment method including the above steps S3010 to S3020, after the tail node negotiates with the upstream node to determine the time slot adjustment strategy, when the tail node receives multiple time slot adjustment indication information sent by the upstream node, the time slot adjustment moment can be determined according to the multiple time slot adjustment indication information, and the corresponding time slot adjustment strategy can be adopted at the time slot adjustment moment to complete the time slot adjustment, so that the different durations of the service bandwidth change moment and the time slot number change moment can be reduced, thereby reducing the number of cached services, reducing network overhead costs and customer service delays.

In one embodiment, multiple time slot adjustment indication information may be carried in multiple time slot adjustment indication code blocks in a service flow, and the time slot adjustment moment may be determined according to the position of any time slot adjustment indication code block.

In one embodiment, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time can be determined according to the time slot adjustment reference time, and the time slot adjustment reference time can be determined according to the third number and the position of any time slot adjustment indication code block.

In one embodiment, the time slot adjustment moment may include one of the following situations: the time slot adjustment moment is the next time slot of the time slot where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference moment is located; the time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference moment is located or the first time slot of the first bearer frame in the next multiframe.

In one embodiment, there may be a fourth number of first code blocks between the position where the time slot adjustment reference time is located and the last time slot adjustment indication code block sent. It should be noted that the fourth number is less than or equal to the third number.

In one embodiment, the time slot adjustment indication code block may further include a time slot adjustment function field, wherein the time slot adjustment function field is used to carry time slot adjustment indication information.

In one embodiment, multiple time slot adjustment indication information may also be carried in an OAM code block in a service flow.

In one embodiment, when the OAM code block includes an APS code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, when the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, and multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the pseudo APS The time slot adjustment moment may be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information in the OAM code block; or, when the APS code block is included in the OAM code block, a pseudo APS code block may be configured before or after the APS code block, and multiple time slot adjustment indication information may be respectively carried in the Base1 code block, the pseudo APS code block and the Base2 code block in the OAM code block, and the time slot adjustment moment may be determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information.

In one embodiment, when the OAM code block includes an APS code block, the APS code block may include a first APS code block and a second APS code block, and the time slot adjustment indication information may be carried in the second APS code block.

In one embodiment, when the OAM code block includes an L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, when the OAM code block does not include the L code block, the position of the L code block in the OAM code block is configured with a pseudo L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, when the OAM code block includes the L code block, the front or back of the L code block can be configured with a pseudo L code block, multiple time slot adjustment indication information can be respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment moment can be determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information.

In one embodiment, the time slot adjustment indication code block may further include check bit information, wherein the check bit information may be used to check the correctness of the time slot adjustment indication information.

In one embodiment, after the tail node receives multiple time slot adjustment indication information sent by the upstream node, the tail node can first determine the validity of each time slot adjustment indication information, and then determine that the time slot adjustment strategy is effective when the number of valid time slot adjustment indication information is greater than the number of invalid time slot adjustment indication information.

In one embodiment, referring to Figure 31, Figure 31 is a flow chart of a process of determining a time slot adjustment strategy through negotiation by an end node provided in an embodiment of the present application. When the end node negotiates with an upstream node to determine a time slot adjustment strategy, as shown in Figure 31, the process of determining the time slot adjustment strategy may include but is not limited to steps S3110-S3120.

Step S3110: receiving the time slot adjustment strategy information sent by the upstream node, and determining the time slot adjustment strategy according to the time slot adjustment strategy information.

Step S3120: Sending time slot adjustment strategy response information to the upstream node, so that the upstream node determines that the time slot adjustment strategy has been negotiated and determined.

In a feasible implementation, the time slot adjustment strategy information may further include time slot adjustment application information and information to be adjusted, wherein the time slot adjustment application information may be used to request time slot adjustment, and the information to be adjusted may be used to determine the policy content of the time slot adjustment strategy.

It should be noted that in the method for performing time slot adjustment by the tail node provided in the embodiment of the present application, the description of the relevant structure of the OAM code block involved and the description of the time slot adjustment process completed by the tail node and the upstream node interacting can refer to the relevant description content in the previous embodiment. In order to avoid redundant content, it will not be repeated here.

In addition, an embodiment of the present application further discloses a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a time slot adjustment method as in any of the previous embodiments is implemented.

In addition, an embodiment of the present application further discloses a computer-readable storage medium, in which computer-executable instructions are stored. The computer-executable instructions are used to execute the time slot adjustment method in any of the previous embodiments.

In an embodiment of the present application, after negotiating with the downstream node and the host node to determine the time slot adjustment strategy, the first node can adopt the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, and send multiple time slot adjustment indication information to the host node through the downstream node, so that the downstream node and the host node can determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and adopt the corresponding time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment, thereby reducing the different durations of the service bandwidth change moment and the time slot number change moment, thereby reducing the number of cached services, reducing costs and customer delays.

It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims (53)

A time slot adjustment method, comprising: After the time slot adjustment strategy is determined through negotiation with the downstream node and the sink node, the time slot adjustment is completed by using the time slot adjustment strategy at the time of time slot adjustment; The downstream node sends multiple time slot adjustment indication information to the destination node, so that the downstream node and the destination node determine the time slot adjustment moment according to the multiple time slot adjustment indication information, and use the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment. The time slot adjustment method according to claim 1, further comprising: The time slot switching time information is sent to the sink node through the downstream node, wherein the time slot switching time information is used to indicate the time slot adjustment time. The time slot adjustment method according to claim 2, wherein the time slot switching time information is carried in a time slot switching time code block in a service flow, and the time slot adjustment time includes one of the following situations: The time slot adjustment moment is a time slot next to the time slot where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching moment code block is located or the first time slot of the first bearer frame in the next multiframe. According to the time slot adjustment method according to claim 2, wherein the time slot adjustment indication information is used to indicate that the time slot adjustment strategy is effective, and multiple time slot adjustment indication information are carried in multiple time slot adjustment indication code blocks in the service flow. The time slot adjustment method according to claim 4, wherein: The time slot switching time information is carried in the time slot switching time code block in the service flow; there are equal or unequal first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent; or, The time slot switching time information is carried in the time slot switching time code block in the business flow; there is a first number of first code blocks between two adjacent time slot adjustment indication code blocks; there is a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent, and the second number is not equal to the first number. According to the time slot adjustment method according to claim 5, when there is a first number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot switching time code block is determined according to the first number and the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 6, wherein the time slot switching time code block corresponds to an expected position in the business flow, and the expected position is determined according to the first number and the position of any one of the time slot adjustment indication code blocks. When the code block corresponding to the expected position is a code block in a data message, the time slot switching time code block is the first code block after the end code block in the data message. The time slot adjustment method according to any one of claims 5 to 7, wherein the time slot adjustment indication code block and the time slot switching time code block have the same code block type, and both the time slot adjustment indication code block and the time slot switching time code block include a time slot adjustment function field, the time slot adjustment function field in the time slot adjustment indication code block is used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching time code block is used to carry the time slot switching time information; The time slot adjustment indication code block and the time slot switching moment code block both include a synchronization header bit, a control word and a type sequence value, and the combination of the synchronization header bit, the control word and the type sequence value serves as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block. According to the time slot adjustment method according to claim 1, wherein the multiple time slot adjustment indication information is carried in multiple time slot adjustment indication code blocks in the business flow, and the time slot adjustment time is determined according to the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 9, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time is determined according to the time slot adjustment reference time, and the time slot adjustment reference time is determined according to the third number and the position of any one of the time slot adjustment indication code blocks. The time slot adjustment method according to claim 10, wherein the time slot adjustment moment includes one of the following situations: The time slot adjustment time is a time slot next to the time slot where the time slot adjustment reference time is located; The time slot adjustment time is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference time is located; The time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference time is located or the first time slot of the first bearer frame in the next multiframe. The time slot adjustment method according to claim 10, wherein there are a fourth number of the first code blocks between the position of the time slot adjustment reference time and the last time slot adjustment indication code block sent, and the fourth number is less than or equal to the third number. According to the time slot adjustment method according to any one of claims 9 to 12, the time slot adjustment indication code block includes a synchronization header bit, a control word, a type sequence value and a time slot adjustment function field, the time slot adjustment function field is used to carry the time slot adjustment indication information, and the combination of the synchronization header bit, the control word and the type sequence value is used as a flag value for indicating the time slot adjustment indication code block. The time slot adjustment method according to claim 1, wherein the multiple time slot adjustment indication information is carried in an OAM code block in the service flow. The time slot adjustment method according to claim 14, wherein: When the OAM code block includes an APS code block, the multiple time slot adjustment indication information are respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in the Base1 code block, the pseudo APS code block and the Base2 code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an APS code block, a pseudo APS code block is configured before or after the APS code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, the pseudo APS code block and a Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, the multiple time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an L code block, a pseudo L code block is configured at the position of the L code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, a pseudo L code block is configured in front of or behind the L code block, and multiple time slot adjustment indication information are respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information. The time slot adjustment method according to claim 15, wherein, when the OAM code block includes an APS code block, the APS code block includes a first APS code block and a second APS code block, and the time slot adjustment indication information is carried in the second APS code block. According to the time slot adjustment method according to claim 4 or 9, wherein the time slot adjustment indication code block includes check bit information, and the check bit information is used to check the correctness of the time slot adjustment indication information. A time slot adjustment method, comprising: After determining the time slot adjustment strategy through negotiation with the upstream node and the downstream node, when receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment moment according to the multiple time slot adjustment indication information, and completing the time slot adjustment by adopting the time slot adjustment strategy at the time slot adjustment moment; Sending a plurality of the time slot adjustment indication information to the downstream node, so that the downstream node determines the time slot adjustment moment according to the plurality of the time slot adjustment indication information, and adopts the time slot adjustment strategy to complete the time slot adjustment at the time slot adjustment moment. The time slot adjustment method according to claim 18, further comprising: receiving time slot switching time information sent by the upstream node, wherein the time slot switching time information is used to indicate the time slot adjustment time; The time slot switching time information is sent to the downstream node. The time slot adjustment method according to claim 19, wherein the time slot switching time information is carried in a time slot switching time code block in a service flow, and the time slot adjustment time includes one of the following situations: The time slot adjustment moment is a time slot next to the time slot where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching moment code block is located or the first time slot of the first bearer frame in the next multiframe. According to the time slot adjustment method according to claim 19, wherein the time slot adjustment indication information is used to indicate that the time slot adjustment strategy is effective, and multiple time slot adjustment indication information are carried in multiple time slot adjustment indication code blocks in the service flow. The time slot adjustment method according to claim 21, wherein: The time slot switching time information is carried in the time slot switching time code block in the service flow; there are equal or unequal first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent; or, The time slot switching time information is carried in the time slot switching time code block in the business flow; there is a first number of first code blocks between two adjacent time slot adjustment indication code blocks; there is a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent, and the second number is not equal to the first number. The time slot adjustment method according to claim 22 is characterized in that when there is a first number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot switching time code block is determined according to the first number and the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 23, wherein the time slot switching time code block corresponds to an expected position in the business flow, and the expected position is determined according to the first number and the position of any one of the time slot adjustment indication code blocks. When the code block corresponding to the expected position is a code block in a data message, the time slot switching time code block is the first code block after the end code block in the data message. The time slot adjustment method according to any one of claims 22 to 24, wherein the time slot adjustment indication code block and the time slot switching time code block have the same code block type, and both the time slot adjustment indication code block and the time slot switching time code block include a time slot adjustment function field, the time slot adjustment function field in the time slot adjustment indication code block is used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching time code block is used to carry the time slot switching time information; The time slot adjustment indication code block and the time slot switching moment code block both include a synchronization header bit, a control word and a type sequence value, and the combination of the synchronization header bit, the control word and the type sequence value serves as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block. According to the time slot adjustment method according to claim 18, wherein the multiple time slot adjustment indication information is carried in multiple time slot adjustment indication code blocks in the business flow, and the time slot adjustment time is determined according to the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 26, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time is determined according to the time slot adjustment reference time, and the time slot adjustment reference time is determined according to the third number and the position of any one of the time slot adjustment indication code blocks. The time slot adjustment method according to claim 27, wherein the time slot adjustment moment includes one of the following situations: The time slot adjustment time is a time slot next to the time slot where the time slot adjustment reference time is located; The time slot adjustment time is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference time is located; The time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference time is located or the first time slot of the first bearer frame in the next multiframe. The time slot adjustment method according to claim 27, wherein there are a fourth number of the first code blocks between the position of the time slot adjustment reference time and the last time slot adjustment indication code block sent, and the fourth number is less than or equal to the third number. According to the time slot adjustment method according to any one of claims 26 to 29, the time slot adjustment indication code block includes a synchronization header bit, a control word, a type sequence value and a time slot adjustment function field, the time slot adjustment function field is used to carry the time slot adjustment indication information, and the combination of the synchronization header bit, the control word and the type sequence value is used as a flag value for indicating the time slot adjustment indication code block. The time slot adjustment method according to claim 18, wherein the multiple time slot adjustment indication information is carried in an OAM code block in the service flow. The time slot adjustment method according to claim 31, wherein: When the OAM code block includes an APS code block, the multiple time slot adjustment indication information are respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in the Base1 code block, the pseudo APS code block and the Base2 code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an APS code block, a pseudo APS code block is configured before or after the APS code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, the pseudo APS code block and a Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, the multiple time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an L code block, a pseudo L code block is configured at the position of the L code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, a pseudo L code block is configured in front of or behind the L code block, and multiple time slot adjustment indication information are respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information. The time slot adjustment method according to claim 32, wherein, when the OAM code block includes an APS code block, the APS code block includes a first APS code block and a second APS code block, and the time slot adjustment indication information is carried in the second APS code block. According to the time slot adjustment method according to claim 21 or 26, the time slot adjustment indication code block includes check bit information, and the check bit information is used to check the correctness of the time slot adjustment indication information. The time slot adjustment method according to claim 18, further comprising: Determining the validity of each of the time slot adjustment indication information; When the number of valid time slot adjustment indication information is greater than the number of invalid time slot adjustment indication information, it is determined that the time slot adjustment strategy is effective. A time slot adjustment method, comprising: After determining the time slot adjustment strategy through negotiation with the upstream node, upon receiving multiple time slot adjustment indication information sent by the upstream node, determining the time slot adjustment moment according to the multiple time slot adjustment indication information; The time slot adjustment strategy is adopted at the time of the time slot adjustment to complete the time slot adjustment. The time slot adjustment method according to claim 36, further comprising: The time slot switching time information sent by the upstream node is received, wherein the time slot switching time information is used to indicate the time slot adjustment time. The time slot adjustment method according to claim 37, wherein the time slot switching time information is carried in the time slot switching time code block in the service flow, and the time slot adjustment time includes one of the following situations: The time slot adjustment moment is a time slot next to the time slot where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position or the first time slot of the next bearer frame of the bearer frame where the code block at the time slot switching moment is located; The time slot adjustment moment is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot switching moment code block is located or the first time slot of the first bearer frame in the next multiframe. According to the time slot adjustment method according to claim 37, wherein the time slot adjustment indication information is used to indicate that the time slot adjustment strategy is effective, and multiple time slot adjustment indication information are carried in multiple time slot adjustment indication code blocks in the service flow. The time slot adjustment method according to claim 39, wherein: The time slot switching time information is carried in the time slot switching time code block in the service flow; there are equal or unequal first code blocks between two adjacent time slot adjustment indication code blocks and between the time slot switching time code block and the last time slot adjustment indication code block sent; or, The time slot switching time information is carried in the time slot switching time code block in the business flow; there is a first number of first code blocks between two adjacent time slot adjustment indication code blocks; there is a second number of first code blocks between the time slot switching time code block and the last time slot adjustment indication code block sent, and the second number is not equal to the first number. According to the time slot adjustment method according to claim 40, when there are a first number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot switching time code block is determined according to the first number and the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 41, wherein the time slot switching time code block corresponds to an expected position in the business flow, and the expected position is determined based on the first number and the position of any one of the time slot adjustment indication code blocks. When the code block corresponding to the expected position is a code block in a data message, the time slot switching time code block is the first code block after the end code block in the data message. The time slot adjustment method according to any one of claims 40 to 42, wherein the time slot adjustment indication code block and the time slot switching time code block have the same code block type, and both the time slot adjustment indication code block and the time slot switching time code block include a time slot adjustment function field, the time slot adjustment function field in the time slot adjustment indication code block is used to carry the time slot adjustment indication information, and the time slot adjustment function field in the time slot switching time code block is used to carry the time slot switching time information; The time slot adjustment indication code block and the time slot switching moment code block both include a synchronization header bit, a control word and a type sequence value, and the combination of the synchronization header bit, the control word and the type sequence value serves as a flag value for indicating the time slot adjustment indication code block or the time slot switching moment code block. According to the time slot adjustment method according to claim 36, wherein the multiple time slot adjustment indication information is carried in multiple time slot adjustment indication code blocks in the business flow, and the time slot adjustment time is determined according to the position of any one of the time slot adjustment indication code blocks. According to the time slot adjustment method according to claim 44, there is a third number of first code blocks between two adjacent time slot adjustment indication code blocks, the time slot adjustment time is determined according to the time slot adjustment reference time, and the time slot adjustment reference time is determined according to the third number and the position of any one of the time slot adjustment indication code blocks. The time slot adjustment method according to claim 45, wherein the time slot adjustment moment includes one of the following situations: The time slot adjustment time is a time slot next to the time slot where the time slot adjustment reference time is located; The time slot adjustment time is the starting position or the first time slot of the next bearer frame of the bearer frame where the time slot adjustment reference time is located; The time slot adjustment time is the starting position of the first bearer frame in the next multiframe of the multiframe where the time slot adjustment reference time is located or the first time slot of the first bearer frame in the next multiframe. The time slot adjustment method according to claim 45, wherein there are a fourth number of the first code blocks between the position of the time slot adjustment reference time and the last time slot adjustment indication code block sent, and the fourth number is less than or equal to the third number. According to any one of claims 44 to 47, the time slot adjustment method, wherein the time slot adjustment indication code block includes a synchronization header bit, a control word, a type sequence value and a time slot adjustment function field, the time slot adjustment function field is used to carry the time slot adjustment indication information, and the combination of the synchronization header bit, the control word and the type sequence value is used as a flag value for indicating the time slot adjustment indication code block. The time slot adjustment method according to claim 36, wherein the multiple time slot adjustment indication information is carried in an OAM code block in a service flow. The time slot adjustment method according to claim 49, wherein: When the OAM code block includes an APS code block, the multiple time slot adjustment indication information are respectively carried in the Base1 code block, the APS code block and the Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an APS code block, a pseudo APS code block is configured between the Base1 code block and the Base2 code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in the Base1 code block, the pseudo APS code block and the Base2 code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an APS code block, a pseudo APS code block is configured before or after the APS code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, the pseudo APS code block and a Base2 code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the Base2 code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, the multiple time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the L code block carrying the time slot adjustment indication information; or, When the OAM code block does not include an L code block, a pseudo L code block is configured at the position of the L code block in the OAM code block, a plurality of the time slot adjustment indication information are respectively carried in a Base1 code block, a Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information; or, When the OAM code block includes an L code block, a pseudo L code block is configured in front of or behind the L code block, and multiple time slot adjustment indication information are respectively carried in the Base1 code block, the Base2 code block and the pseudo L code block in the OAM code block, and the time slot adjustment time is determined according to the position of the first Base1 code block after the pseudo L code block carrying the time slot adjustment indication information. According to the time slot adjustment method according to claim 50, when the OAM code block includes an APS code block, the APS code block includes a first APS code block and a second APS code block, and the time slot adjustment indication information is carried in the second APS code block. According to the time slot adjustment method according to claim 39 or 44, the time slot adjustment indication code block includes check bit information, and the check bit information is used to check the correctness of the time slot adjustment indication information. The time slot adjustment method according to claim 36, further comprising: Determining the validity of each of the time slot adjustment indication information; When the number of valid time slot adjustment indication information is greater than the number of invalid time slot adjustment indication information, it is determined that the time slot adjustment strategy is effective.