WO2017219847A1

WO2017219847A1 - Message sending method and device

Info

Publication number: WO2017219847A1
Application number: PCT/CN2017/087095
Authority: WO
Inventors: 毕杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-06-24
Filing date: 2017-06-02
Publication date: 2017-12-28
Also published as: CN107547414A

Abstract

The present invention relates to the technical field of communications and provides a message sending method and device. The method comprises: acquiring first traffic information of a message issued by a line card; performing first-stage traffic control on the message according to the first traffic information, and obtaining second traffic information of the message received after the first-stage traffic control; performing second-stage traffic control on the message according to the second traffic information, and obtaining third traffic information of the message received after the second-stage traffic control; sending the message subjected to the second-stage traffic control to a channelized queue corresponding to the message, and performing third-stage traffic control on the message in the channelized queue according to the third traffic information; and sending the message subjected to the third-stage traffic control to a sending port corresponding to the message for sending. The solution of the present invention can achieve different stages of traffic control during message forwarding.

Description

Message sending method and device

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a message sending method and apparatus.

Background technique

SONET (Synchronous Optical Network) is an ANSI-defined synchronous transmission system. It is a global standard transmission protocol that uses optical transmission.

SDH (Synchronous Digital Hierarchy) is defined by CCITT (now ITU-T). It uses synchronous multiplexing and flexible mapping structure to directly insert and insert low-speed tributary signals from SDH signals without A large number of multiplex/tap devices are required to reduce signal loss and equipment investment.

When the SDH signal is considered to be multiplexed by low-speed signals, these low-speed tributary signals are called channels. CPOS (Channelized POS, the channelized POS interface, the POS interface is the packet transmitted in SONET/SDH, ie Packet Over SONET/SDH), which makes full use of the characteristics of the SDH system and has the ability to finely divide the bandwidth. It can reduce the number of low-speed physical ports on the network, enhance the low-speed port aggregation capability of the device, and improve the dedicated line access capability of the device. The CPOS interface is mainly used to improve the aggregation capability of devices for low-speed access. The interface rates of mainstream applications include STM-1 (155.52 Mbit/s), STM-4 (622 M bit/s), and STM-16 (2.5 Gbit/s). Wait.

On the current mobile bearer network PTN, IPRAN access side, and a large number of enterprise network access sides, the POS/CPOS interface module is still widely used as the interface of the UNI side (user unit interface) and part of the NNI side (network element interface). And a large number of new commercial needs.

Currently, most access/aggregation routers support POS/CPOS interfaces. For the front-plug-in POS/CPOS interface modules, most of the routers are implemented as shown in Figure 1. The packet processing chip of the network access traffic in FIG. 1 is on the line card of the router, and the front plug-in POS/CPOS interface module generally includes a link mapper module, a framer module and a physical interface. The packet is encapsulated in the VC (virtual container) container of the corresponding rate class by the link map module in the downlink direction, and then sent through the STM port according to the SDH transmission frame structure layer encapsulation by the subsequent production module.

In the downstream direction of the traffic, the forwarding speed of the packet processing chip of the line card is high (currently, the packet forwarding capability of the mainstream packet processing chip is above 40 Gbit/s), while the outgoing port rate of the POS and CPOS interface modules is low (the STM-1 port has only 155M). The STM-4 port is 622M), which often requires flow control on the packet processing chip or interface module of the online card.

The flow control of the line card is often implemented by a packet processing chip built-in TM module (Traffic Management, Traffic Management Module) or a dedicated TM chip for port or channel-level speed limit (ie, GTS function at the port or channel level). On the other hand, the link rate of the POS/CPOS interface module is only 2 Mbit/s. The channel-level rate limit function of the line card module is generally large. It cannot be accurately limited according to the low rate of 2 Mbit/s. The channel-level speed limit has higher cost requirements for the TM module or the TM chip. When multiple CPOS/POS interface modules are configured, the hardware cost of the router is greatly increased.

For the traditional flow control scheme on the interface module, the line card and POS/CPOS interface module are generally used as shown in Figure 1. Shows SPI4.2 or interlaken interfaces that support channelization. Although the SPI4.2 interface supports channelization level flow control, it cannot support the total bandwidth flow control of the entire port between the line card and the interface module, and there are many SPI4.2 buses, which is not conducive to hardware implementation and cost control. The Interlaken interface also does not support port-level traffic control, and since the baud rate of the single channel of the interface has reached 12.5 Gbps, for POS/CPOS 2 Mbit/s low-rate channelized applications, the flow control is very sensitive and not stable. control.

Summary of the invention

The purpose of the disclosure is to provide a message sending method and device, which can implement different levels of flow control.

To achieve the above objective, an embodiment of the present disclosure provides a method for sending a message, including:

Obtaining the first traffic information of the packet delivered by the line card;

Performing, according to the first traffic information, performing first-level flow control on the packet, and obtaining second traffic information of the packet received after performing the first-level flow control;

And performing second-level flow control on the packet according to the second flow information, and obtaining third traffic information of the received packet after performing the second-level flow control;

Transmitting the packet with the second-level flow control to the channelized queue corresponding to the packet, and performing third-level flow control on the packet in the channelized queue according to the third traffic information;

The packet with the third-level flow control is sent to the sending port corresponding to the packet for transmission.

The step of obtaining the first traffic information of the packet delivered by the line card includes:

Receiving and buffering the message delivered by the line card;

Obtaining the first traffic information of the packet.

The step of performing the first-level flow control on the packet according to the first traffic information, and obtaining the second traffic information of the packet received after the first-level flow control is performed includes:

And sending, by the line card, the first back pressure message to the line card, if the traffic indicated by the first traffic information is greater than the first threshold, where the first backpressure message is used by the line card to perform the first Primary flow control;

The second traffic information of the packet after the first-level flow control is obtained.

After performing the first-level flow control on the packet, the method further includes:

The packet is classified to obtain an output port corresponding to the channel corresponding to the packet, where the packet has a custom label carrying a channel number.

The step of performing the second-level flow control on the packet according to the second traffic information, and obtaining the third traffic information of the packet after the second-level flow control is performed includes:

If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, outputting the second backpressure packet through the backpressure channel to perform second-level flow control on the packet;

The third traffic information of the received message after the second-level flow control is obtained.

The step of performing third-level flow control on the packets in the channelized queue according to the third traffic information includes:

If the flow rate indicated by the third flow information is greater than the second threshold, outputting a third back pressure message through the back pressure channel The message performs third-level flow control.

The step of sending the packet with the second-level flow control to the channelized queue corresponding to the packet includes:

And performing the shaping processing on the packet after the second-level flow control is performed to obtain the processed packet;

According to the channel number of the processed packet, the processed packet is smoothly sent to the channelized queue corresponding to the channel number.

The step of sending the packet after the third-level flow control is sent to the sending port corresponding to the packet includes:

Packets that are subjected to the third-level flow control are encapsulated according to their respective channel numbers, and are cross-mapped into the corresponding sending port and sent out at the rate of the sending port.

An embodiment of the present disclosure further provides a message sending apparatus, including:

The obtaining module is configured to obtain the first traffic information of the packet delivered by the line card;

The first control module is configured to perform first-level flow control on the packet according to the first traffic information, and obtain second traffic information of the received packet after performing the first-level flow control;

The second control module is configured to perform second-level flow control on the packet according to the second traffic information, and obtain third traffic information of the packet received after performing the second-level flow control;

The forwarding module is configured to send the packet with the second-level flow control to the channelized queue corresponding to the packet;

The third control module is configured to perform third-level flow control on the packets in the channelized queue according to the third traffic information;

The sending module is configured to send the packet with the third-level flow control to the sending port corresponding to the packet for sending.

The obtaining module includes:

a receiving unit, configured to receive a message sent by the line card;

a cache unit, configured to cache the message;

Obtaining a subunit, configured to obtain the first traffic information of the packet.

The first control module is configured to: if the traffic indicated by the first traffic information is greater than the first threshold, send a first backpressure packet to the line card, where the first backpressure packet is used The line card performs the first-level flow control on the packet, and obtains the second traffic information of the packet after the first-level flow control is performed.

The message sending device further includes:

The identification module is configured to classify the packet to obtain an output port corresponding to the channel corresponding to the packet, where the packet has a custom label carrying a channel number.

The second control module is configured to:

If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, outputting the second backpressure packet through the backpressure channel to perform second-level flow control on the packet; The third traffic information of the packet after the second-level flow control is obtained.

The third control module is configured to:

And if the traffic indicated by the third traffic information is greater than the second threshold, the third backflow packet is output through the backpressure channel to perform third-level flow control on the packet.

The forwarding module is configured to: perform shaping processing on the packet that is controlled by the second-level flow control, and obtain a processed packet; and smoothly process the processed packet according to the channel number of the processed packet. The packet is sent to the channelized queue corresponding to the channel number.

The sending module is configured to: encapsulate the packets after the third-level flow control, encapsulate the packets according to the channel numbers, and cross-map them into the corresponding sending ports, and send them according to the rate of the sending port.

The method for sending a packet in the embodiment of the present disclosure obtains the first traffic information of the packet delivered by the line card, and performs the first-level flow control on the packet according to the first traffic information, and obtains the first The second traffic information of the received packet after the traffic control is performed; the second traffic control is performed on the packet according to the second traffic information, and the packet received after the second-level traffic control is obtained. The traffic information is sent to the channelized queue corresponding to the packet, and the third-level packet is sent to the channelized queue according to the third traffic information. The flow control is performed. The packets sent by the third-level flow control are sent to the corresponding sending port of the packet for transmission. Thus, different levels of flow control, including cache size, number of flow control channels, and flow control granularity, are greatly simplified, and the interface module of the conventional fixed POS or CPOS greatly simplifies the hardware interface module type and reduces the implementation cost.

DRAWINGS

Figure 1 shows the implementation of a traditional POS/CPOS interface module.

2 is a flow chart of a method of transmitting a message of the present disclosure.

3 is a block diagram of a transmitting apparatus of a message of the present disclosure.

4 is a block diagram of a specific implementation module of a transmitting apparatus of a message according to the present disclosure.

5 is a block diagram of a flow control implementation of a POS interface module of the present disclosure.

6 is a flow chart of the flow control implementation of the rear POS interface module of the present disclosure.

7 is a block diagram of a flow control implementation of the CPOS interface module of the present disclosure.

8 is a flow chart of a flow control implementation of the CPOS interface module of the present disclosure.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 2, an embodiment of the present disclosure provides a packet sending method, including:

Step 21: Obtain first traffic information of the packet delivered by the line card.

Step 22: Perform first-level flow control on the packet according to the first traffic information, and obtain second traffic information of the received packet after performing the first-level flow control.

Step 23: Perform second-level flow control on the packet according to the second traffic information, and obtain third traffic information of the received packet after performing the second-level flow control.

Step 24: Send the packet with the second-level flow control to the channelized queue corresponding to the packet.

Step 25: Perform third-level flow control on the packets in the channelized queue according to the third traffic information.

Step 26: The third-level flow control packet is sent to the sending port corresponding to the packet for transmission.

The packet sending method of the embodiment of the present disclosure obtains the first traffic information of the packet delivered by the line card, performs the first-level flow control on the packet according to the first traffic information, and obtains the first-level flow control. The second traffic information of the received packet is controlled by the second traffic control according to the second traffic information, and the third traffic information of the received packet after the second-level traffic control is obtained; The traffic control packet is sent to the channelized queue corresponding to the packet, and the third-level traffic control is performed on the packet in the channelized queue according to the third traffic information. The sending port corresponding to the packet is sent for transmission. Thus, different levels of flow control, including cache size, number of flow control channels, and flow control granularity, are greatly simplified, and the interface module of the conventional fixed POS or CPOS greatly simplifies the hardware interface module type and reduces the implementation cost.

As shown in FIG. 3, an embodiment of the present disclosure further provides a packet sending apparatus 30, including:

The obtaining module 31 is configured to obtain first traffic information of the packet delivered by the line card.

The first control module 32 is configured to perform first-level flow control on the packet according to the first traffic information, and obtain second traffic information of the received packet after performing the first-level flow control;

The second control module 33 is configured to perform second-level flow control on the packet according to the second traffic information, and obtain third traffic information of the received packet after performing the second-level flow control;

The forwarding module 34 is configured to send the packet with the second-level flow control to the channelized queue corresponding to the packet;

The third control module 35 is configured to perform third-level flow control on the packets in the channelized queue according to the third traffic information;

The sending module 36 is configured to send the packet with the third-level flow control to the sending port corresponding to the packet for transmission.

The specific implementation of the device is shown in Figure 4: The flow control device for the downstream traffic direction of the POS/CPOS interface module mainly includes the following modules:

An input module, a traffic management module (corresponding to a first control module, a second control module, a third control module, and a forwarding module in the transmitting device of the foregoing message), a cache module, and an output module (corresponding to a transmitting device of the above message) In the sending module);

The port between the input module and the line card is connected, and the downlink packet of the line card is received and cached in the downlink direction. The specific port can be selected according to the type of the access side interface of the line card processing chip. The module includes: an Ethernet interface (GE/10G MAC) and a first cache; the Ethernet interface receives the packet sent by the line card, and the packet is sent to the first cache for buffering.

The traffic management module mainly implements the downlink input port level (the first-level flow control) of the packet sent by the line card, the output SDH port (the second-level flow control described above), and the channelization level (the third-level flow control described above). Flow control function.

After the traffic management module identifies and classifies the packets in the first buffer of the input module, it sends the packets to the corresponding channelized queue according to the channel number of each packet. The three-level flow control function is managed and triggered by the module.

The cache module stores the downlink packets in the corresponding channelized queues according to the classification result of the traffic management module. The channelized queues are configured according to different POS/CPOS services, and can be reconstituted into a link channel, a bundle group, and a link channel+channel combination.

The output module encapsulates and maps the packets of each channel in the cache module to each output SDH port.

The specific implementation process of the method shown in Figure 2 above includes:

Step 211: Receive and cache a message delivered by the line card.

Step 212: Acquire first traffic information of the packet.

Optionally, step 22 can include:

Step 213: If the traffic indicated by the first traffic information is greater than the first threshold, send a first backpressure packet to the line card, and the line card performs first-level flow control on the packet according to the first backpressure; for example, the first The back pressure packet carries a switch (ie, a back pressure flag) for continuing to send a message. After receiving the first back pressure message, the line card determines whether to continue sending the message according to the switch in the first back pressure message. If it is on, it will continue to send. If it is off, it can wait for a time interval and then send it again, so as to control the flow of the message sent by the line card;

Step 214: Obtain second traffic information of the packet after the first-level flow control is performed.

Optionally, the method further comprises:

Step 215: The packet is classified to obtain an output port corresponding to the channel corresponding to the packet, where the packet has a custom label carrying a channel number.

Optionally, the above step 23 includes:

Step 216: If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, outputting the second backpressure packet through the backpressure channel to perform second-level flow control on the packet; The third traffic information of the packet after the second-level flow control is carried; the second backpressure packet carries the channel number corresponding to the packet that needs to be controlled by the flow control, to indicate that the line card matches the designated channel in the backpressure packet. Packets are subjected to flow control, so that the total bandwidth of all channel packets destined for the same output STM port does not exceed the standard bandwidth requirement of the STM port; optionally, the channel number in the second backpressure packet can be used. Traffic control on the packets of the channel, such as the traffic control of the packets of the specified channel in the backpressure packet, ensures that the total bandwidth of all tunnel packets destined for the same output STM port does not exceed the standard bandwidth requirement of the STM port.

Step 217: The packet that is subjected to the second-level flow control is sent to the channelized queue corresponding to the packet. Specifically, the packet that is subjected to the second-level flow control is shaped and processed to obtain the processed packet. According to the channel number of the processed packet, the processed packet is smoothly sent to the channelized queue corresponding to the channel number.

Optionally, the above step 25 may include:

Step 218: If the traffic volume indicated by the third traffic information is greater than the second threshold, the third backpressure packet is outputted through the backpressure channel to perform third-level flow control on the packet; the third backpressure packet carries traffic required to be performed. The channel number corresponding to the control packet still needs to be controlled by the line card to control the transmission of the specified channel message. Optionally, the channel of the channel can be controlled according to the channel number in the second backpressure packet. Ensure that each channel buffer or bundle cache does not exceed the respective threshold. If the individual channel buffer exceeds the limit, the backpressure packet carries the cache channel number that exceeds the limit. If the bundle cache exceeds the limit, the backpressure packet carries all the channel numbers in the bundle group.

Optionally, step 26 can include:

Step 219: The third-level flow control packet is encapsulated according to the channel number, and is cross-mapped into the corresponding sending port, and sent according to the rate of the sending port.

As shown in FIG. 4, it is a schematic diagram of a device for transmitting a message corresponding to a specific implementation process of the foregoing method:

The flow management module implements the downstream traffic flow control process as follows:

1. The input port controller in the input module, such as the GE/10G MAC receiving line card, sends the downlink packet and buffers it by the first buffer, and reports the buffer status of the packet in the first buffer to the traffic management. Module.

The traffic management module first determines whether to trigger the input port level flow control according to the empty state of the input buffer in the input module;

When the downlink traffic burst is too large and exceeds the back pressure threshold of the input buffer (such as the first threshold mentioned above), the flow control engine module in the traffic management module triggers the Ethernet controller to generate the flow control at the input port level. Back pressure message. For the Ethernet port, the flow control at the input port level can be directly implemented using the flow control method defined in 802.3x.

2. After the first buffer, the downlink packet continues to enter the traffic management module for traffic monitoring and control at the next level. This process can implement the SDH output port and traffic policing function according to actual needs. When the traffic policing function of the module is implemented, the downlink packet needs to be added with a custom label header. That is, the downlink packet sent by the line card packet processing module needs to add a custom label header that can be recognized by the module. The format of the message with a custom tag header is as follows:

DMAC

SMAC

TPID1

User tag1

TPID2

User tag2

Payload+CRC32

The TPID1, User tag1, TPID2, and User tag2 are part of the custom tag header. The TPID is a custom tag header type. The length is 2 bytes. The value is a custom value and needs to be different from the Ethernet packet type id defined in 802.3.

The user tag is a custom tag with a length of 2 bytes, which contains the link channel number corresponding to the downlink packet.

After the packet enters the traffic management module, the traffic monitoring function is as follows:

First, the classification of the message stream is performed. Determine the output STM port corresponding to the link (link) or the bundle group corresponding to the packet according to the channel number lookup table in the custom tag.

Secondly, in the SDH port policing module (SDH port control module), the traffic metering module (the traffic monitoring module) is used to monitor the overall bandwidth of an STM port. If the total bandwidth exceeds the output port rate, the traffic control engine module triggers the report. The dedicated back pressure channel outputs a back pressure message for flow control of the STM output port level, and the back pressure message includes a channel number requiring flow control;

Then, the flow-controlled packet is sent to each link channel or bundle group queue for smoothing after traffic shaping, and is prevented from being input to the subsequent link buffer (link cache) or bundle. The burst traffic of the buffer (channel group buffer) is too large.

Finally, the traffic management module determines whether to trigger a back channel message at the link channel level or the bundle group level according to the state of each link buffer or bundle buffer, and the back pressure message has a link channel number that needs to be controlled by the flow. At this time, the third-level channelized flow control of the packet on the interface module is implemented.

3. The packets waiting to be sent in each link buffer and bundle buffer are encapsulated in the output module and cross-mapped into the corresponding SDH output port according to the result of the lookup table, and finally sent according to the STM-n standard rate.

FIG. 5 and FIG. 6 are flowcharts of the flow control implementation of the post-POS interface module of the present disclosure. When the interface module is configured as a POS interface, the packet flow control process is as follows:

Step S101: The input port receives and buffers the downlink packet, and reports the empty buffer status of the input buffer to the traffic management module;

Step S102: determining whether the input buffer of the input port exceeds the set high water line, if the entry exceeds S103, otherwise proceeds to S104;

Step S103: triggering the Ethernet controller to generate a first-level input port-level flow control backpressure message;

Step S104: The downlink packet continues to enter the traffic management module to identify the packet, identify the link channel corresponding to each packet, and check the packet to determine the STM outgoing port, and implement traffic supervision of the corresponding STM port.

Step S105: Determine whether the SDH port traffic corresponding to the packet exceeds the SDH port bandwidth. If yes, execute S106, otherwise execute S107;

Step S106: Send a backpressure packet of the STM port level through a dedicated backpressure channel or an in-band backpressure packet;

Step S107: The smoothing of the downlink message is sent to the corresponding link buffer for buffering;

Step S108: determining the buffer buffer state, such as exceeding the high watermark of each buffer, executing S109, otherwise executing S110;

Step S109: triggering an in-band or dedicated out-of-band backpressure channel to send a link-level backpressure message.

Step S110: The packet in each link buffer is encapsulated by the output module and cross-mapped into the corresponding SDH egress port, and sent according to the STM-n standard rate.

FIG. 7 and FIG. 8 are flowcharts showing the flow control implementation of the post-CPOS interface module of the present disclosure. When the interface module is configured as a CPOS interface, the packet flow control process is as follows:

Step S201: The input port receives and buffers the downlink packet, and reports the empty buffer status of the input buffer to the traffic management module;

Step S202: determining whether the input buffer of the input port exceeds the set high water line, if it exceeds the entry S203, otherwise proceeds to S204;

Step S203: triggering the Ethernet controller to generate a first-level ingress-level flow control backpressure message;

Step S204: The downlink packet continues to enter the traffic management module to identify the packet, identify the link channel corresponding to each packet, and check the packet to determine the STM outgoing port, and implement traffic supervision of the corresponding STM port.

Step S205: determining whether the SDH port traffic corresponding to the packet exceeds the SDH port bandwidth, if yes, executing S206, otherwise executing S207;

Step S206: Send a backpressure packet of the STM port level through a dedicated backpressure channel or an in-band backpressure packet;

Step S207: The downlink packet is smoothly sent to the corresponding bundle buffer for buffering;

Step S208: determining the buffer buffer state, if the high water line set by the bundle buffer is exceeded, executing S209, otherwise executing S210;

Step S209: The triggering in-band or dedicated out-of-band backpressure channel sends a backpressure message, and the channel number in the packet includes all the link channels in the bundle buffer group.

Step S210: The packets in each bundle buffer are encapsulated by the output module according to the respective link channel numbers and cross-mapped into the corresponding SDH egress port, and sent according to the STM-n standard rate.

The POS/CPOS interface module flow control device and the implementation method provided by the disclosure can implement an input port level. Outputs SDH port level, logical channel to bundle group level and other levels of flow control, so that flow control can be accurate to different channel or port level according to actual needs, greatly reducing the line card packet processing chip TM function or dedicated TM chip downlink Flow control requirements reduce the difficulty and cost of implementing the entire line card.

In addition, the flow control modules of the various levels in the disclosure have reconfigurable features, that is, different configurations can be loaded according to specific service requirements, thereby implementing different levels of flow control, including cache size, number of flow control channels, and flow control granularity. Compared with the traditional fixed POS or CPOS interface module, the hardware interface module type is greatly simplified and its implementation cost is reduced.

As shown in FIG. 3, corresponding to the foregoing method, the embodiment of the present disclosure further provides a message sending apparatus 30, including:

The obtaining module 31 includes:

a receiving unit, configured to receive a message sent by the line card;

Cache unit, set to cache messages;

The sub-unit is obtained, and is configured to obtain the first traffic information of the packet.

The first control module 32 is configured to: if the traffic indicated by the first traffic information is greater than the first threshold, send a first backpressure packet to the line card, where the first backpressure packet is used by the line card to perform the packet The first level flow control; and obtains the second flow information of the message after the first level flow control.

The sending device of the foregoing message further includes:

The identification module is configured to classify the packet, and obtain an output port corresponding to the channel corresponding to the packet, where the packet has a custom label carrying a channel number.

The second control module 33 is configured to:

If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, the second backpressure packet is output through the backpressure channel to perform second-level flow control on the packet, and the second flow control is performed. The third traffic information of the packet after the traffic control.

The third control module 35 is configured to:

If the traffic indicated by the third traffic information is greater than the second threshold, the third backpressure packet is output through the backpressure channel to perform third-level flow control on the packet.

The forwarding module 34 is configured to: perform processing on the packet after the second-level flow control is performed, and obtain the processing. After the packet is received, the processed packet is sent to the channelized queue corresponding to the channel number according to the channel number of the processed packet.

The sending module 36 is configured to: encapsulate the packets that are subjected to the third-level flow control, encapsulate the packets according to the respective channel numbers, and cross-map them into the corresponding sending ports, and send them according to the rate of the sending port.

The above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Those skilled in the art will appreciate that the various modules and steps described above can implement hardware reconstruction of the various modules and steps described above by loading different fpga versions using fpga. It can also be implemented using a general purpose computing device, optionally in software code that can be executed by the computing device.

In addition, it should be noted that the electronic devices described in this specification include, but are not limited to, smartphones, tablets, etc., and many of the functional components described are referred to as modules to more particularly emphasize the independence of their implementation. .

Many of the functional components described in this specification are referred to as modules to more particularly emphasize the independence of their implementation.

In an embodiment of the present disclosure, the modules may be implemented in software for execution by various types of processors. For example, an identified executable code module can comprise one or more physical or logical blocks of computer instructions, which can be constructed, for example, as an object, procedure, or function. Nonetheless, the executable code of the identified modules need not be physically located together, but may include different instructions stored in different bits that, when logically combined, constitute a module and implement the provisions of the module. purpose.

In practice, the executable code module can be a single instruction or a plurality of instructions, and can even be distributed across multiple different code segments, distributed among different programs, and distributed across multiple memory devices. As such, operational data may be identified within the modules and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations (including on different storage devices), and may at least partially exist as an electronic signal on a system or network.

When the module can be implemented by software, considering the level of the existing hardware process, the module can be implemented in software, and the technician can construct a corresponding hardware circuit to implement the corresponding function without considering the cost. The hardware circuitry includes conventional Very Large Scale Integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components. The modules can also be implemented with programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.

The above-described exemplary embodiments are described with reference to the drawings, and the various embodiments and embodiments may be practiced without departing from the spirit and scope of the disclosure. The limitations of the example. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and the scope of the disclosure will be disclosed to those skilled in the art. In these figures, component dimensions and relative dimensions may be exaggerated for clarity. The terminology used herein is for the purpose of describing the particular embodiments of the embodiments The singular forms "a", "the", and "the" It will be further understood that the terms "comprises" and/or "comprises", when used in the specification, are used to indicate the presence of features, integers, steps, operations, components and/or components, but do not exclude one or more other features, The presence or addition of integers, steps, operations, components, components, and/or their ethnic groups. Unless otherwise stated, a range of values includes the statement The upper and lower limits of the range and any subranges between them.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. These improvements and retouchings should also be considered as The scope of protection of the present disclosure.

Claims

A method for sending a message, comprising:

Obtaining the first traffic information of the packet delivered by the line card;

Performing, according to the first traffic information, performing first-level flow control on the packet, and obtaining second traffic information of the packet received after performing the first-level flow control;

And performing second-level flow control on the packet according to the second flow information, and obtaining third traffic information of the received packet after performing the second-level flow control;

Transmitting the packet with the second-level flow control to the channelized queue corresponding to the packet, and performing third-level flow control on the packet in the channelized queue according to the third traffic information;

The packet with the third-level flow control is sent to the sending port corresponding to the packet for transmission.
The method for transmitting a packet according to claim 1, wherein the step of acquiring the first traffic information of the packet delivered by the line card comprises:

Receiving and buffering the message delivered by the line card;

Obtaining the first traffic information of the packet.
The packet sending method according to claim 1, wherein the first traffic control is performed on the packet according to the first traffic information, and the second packet received after the first-level traffic control is obtained is obtained. The steps of the traffic information include:

And sending, by the line card, the first back pressure message to the line card, if the traffic indicated by the first traffic information is greater than the first threshold, where the first backpressure message is used by the line card to perform the first Primary flow control;

And classifying the packet, and obtaining an output port corresponding to the channel corresponding to the packet, where the packet has a custom label carrying a channel number;

Obtaining second traffic information of the received message after performing the first-level flow control.
The packet sending method according to claim 1, wherein the second traffic control is performed on the packet according to the second traffic information, and the third packet received after the second-level traffic control is obtained. The steps of the traffic information include:

If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, outputting the second backpressure packet through the backpressure channel to perform second-level flow control on the packet;

The third traffic information of the packet after the second-level flow control is obtained.
The packet sending method according to claim 1, wherein the step of performing third-level flow control on the packets in the channelized queue according to the third traffic information comprises:

And if the traffic indicated by the third traffic information is greater than the second threshold, the third backflow packet is output through the backpressure channel to perform third-level flow control on the packet.
The packet sending method according to claim 1, wherein the step of sending the packet with the second-level flow control to the channelized queue corresponding to the packet includes:

And performing the shaping processing on the packet after the second-level flow control is performed to obtain the processed packet;

According to the channel number of the processed packet, the processed packet is smoothly sent to the channelized queue corresponding to the channel number.
The method for transmitting a message according to claim 1, wherein the step of sending the packet with the third-level flow control to the sending port corresponding to the packet for transmission comprises:

Packets that are subjected to the third-level flow control are encapsulated according to their respective channel numbers, and are cross-mapped into the corresponding sending port and sent out at the rate of the sending port.
A message sending device, comprising:

The obtaining module is configured to obtain the first traffic information of the packet delivered by the line card;

The first control module is configured to perform first-level flow control on the packet according to the first traffic information, and obtain second traffic information of the received packet after performing the first-level flow control;

The second control module is configured to perform second-level flow control on the packet according to the second traffic information, and obtain third traffic information of the packet received after performing the second-level flow control;

The forwarding module is configured to send the packet with the second-level flow control to the channelized queue corresponding to the packet;

The third control module is configured to perform third-level flow control on the packets in the channelized queue according to the third traffic information;

The sending module is configured to send the packet with the third-level flow control to the sending port corresponding to the packet for sending.
The message transmitting apparatus according to claim 8, wherein the obtaining module comprises:

a receiving unit, configured to receive a message sent by the line card;

a cache unit, configured to cache the message;

Obtaining a subunit, configured to obtain the first traffic information of the packet.
The message transmitting apparatus according to claim 8, wherein the first control module is configured to: if the traffic indicated by the first traffic information is greater than the first threshold, send the first backpressure packet to the line card, The first backpressure packet is used by the line card to perform first-level flow control on the packet.

Obtaining second traffic information of the packet received after performing the first-level flow control; and

The packet sending device further includes an identifying module, configured to classify the packet, and obtain an output port corresponding to the channel corresponding to the packet, where the packet has a channel number carrying Define the label.
The message transmitting apparatus according to claim 8, wherein said second control module is configured to:

If the traffic indicated by the second traffic information is greater than the bandwidth of the output port corresponding to the channel corresponding to the packet, outputting the second backpressure packet through the backpressure channel to perform second-level flow control on the packet;

The third traffic information of the packet after the second-level flow control is obtained.
The message transmitting apparatus according to claim 8, wherein said third control module is configured to:

If the traffic indicated by the third traffic information is greater than the second threshold, outputting a third backpressure packet through the backpressure channel The message performs third-level flow control.
The packet sending apparatus according to claim 8, wherein the forwarding module is configured to: perform shaping processing on the packet subjected to the second-level flow control, to obtain a processed packet; and follow the processed The channel number of the packet is sent to the channelized queue corresponding to the channel number.
The message transmitting apparatus according to claim 8, wherein the sending module is configured to: encapsulate the packets subjected to the third-level flow control, encapsulate them according to respective channel numbers, and cross-map them into corresponding sending ports. Send out at the rate of the sending port.
A computer storage medium storing execution instructions, the execution instructions being executed by a processor to perform the method of any one of claims 1 to 7.