CN113037651B - Method, device, equipment and storage medium for improving QoS (quality of service) of traffic forwarding - Google Patents
Method, device, equipment and storage medium for improving QoS (quality of service) of traffic forwarding Download PDFInfo
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- CN113037651B CN113037651B CN202011608043.XA CN202011608043A CN113037651B CN 113037651 B CN113037651 B CN 113037651B CN 202011608043 A CN202011608043 A CN 202011608043A CN 113037651 B CN113037651 B CN 113037651B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/34—Source routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/6275—Queue scheduling characterised by scheduling criteria for service slots or service orders based on priority
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The embodiment of the invention discloses a method, a device, equipment and a storage medium for improving QoS (quality of service) of flow forwarding, wherein the method for improving QoS of flow forwarding comprises the following steps: by adding TLV records serving as QoS information in the routing extension header SRH inserted in the IPv6 message in SRv, identifying the message type in SRv source nodes, recording the information in the SRH, and delivering the IPv6 message to different priority queues of a forwarding interface of the End SID node in the End SID node for forwarding the IPv6 message according to the TLV records serving as QoS information in the routing extension header SRH inserted in the IPv6 message, so that the IPv6 message of the uRLLC type is forwarded preferentially to ensure the forwarding delay of the IPv6 message.
Description
Technical Field
The invention relates to the technical field of QoS (quality of service) improvement, also belongs to the technical field of IP (Internet protocol) networks, and mainly relates to a method, a device, equipment and a storage medium for improving QoS of traffic forwarding, in particular to a method, a device, equipment and a storage medium for improving QoS in the traffic forwarding process under SRv.
Background
The SR architecture is based on source routing. Nodes (routers, hosts, or devices) select paths and direct packets along the paths through the network by inserting a list of segments in the data header in order to instruct the nodes that received the packets how to forward and process the packets, i.e., SR (Segment Routing) is a source routing protocol that supports inserting forwarding operation instructions into the packets at the beginning of the paths to direct the forwarding of the packets in the network, thereby supporting network programmability, and SR based on the IPv6 data plane is referred to as SRv.
In SRv, the End SID acts as a processing node, and when the processing node receives a message, it executes an End instruction to process the message. When the message is processed, the message is processed only according to the instruction corresponding to the End SID, the function of identifying the specific message service carried by SRv is not realized, and when the message is sent out from the processing node, the same processing is carried out, and the messages are not treated differently. When the network flow is burst, the messages sent by the processing nodes are increased, the time delay of some messages may be increased due to the fact that the messages cannot be identified, when the burst messages are overlarge, the messages are discarded when the forwarded instant messages exceed the processing capacity of the messages. In the networking structure of fig. 1, if the flow sent from the a node to the D node is an ultra-reliable low-delay communication ul lc type data flow, when the B node to the D node or the C node to the D node generates a burst during forwarding of the End4 node, the delay and packet loss of the flow from the a node to the D node may be adversely affected.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for improving QoS (quality of service) of flow forwarding, which are characterized in that a TLV record serving as QoS information is added in a routing extension head SRH inserted in an IPv6 message in SRv, a message type is identified in SRv source nodes, the information is recorded in the SRH, the IPv6 message is respectively delivered to different priority queues of a forwarding interface of the End SID node according to the TLV record serving as the QoS information in the routing extension head SRH inserted in the IPv6 message in the End SID node for forwarding the IPv6 message, so that the IPv6 message of uRLLC type is forwarded preferentially, and the forwarding delay of the IPv6 message is ensured.
The embodiment of the invention provides a method for improving QoS (quality of service) of flow forwarding, which comprises the following steps:
adding a TLV record serving as QoS information in a routing extension header SRH, wherein the TLV record is used for recording the QoS attribute of the IPv6 message, and the QoS attribute comprises the priority of the IPv6 message;
the source node in SRv identifies the priority of the IPv6 message and stores the priority in the TLV record;
the source node in SRv sends IPv6 message to End SID node;
the output interface of the End SID node performs queue scheduling on the IPv6 message;
and the End SID node sends the IPv6 message in the priority queue to a destination node.
Further, the priority of the IPv6 message is divided into a plurality of priorities.
Further, the priority of the IPv6 message is divided into 8 priorities, which are respectively 0 number priority, 1 number priority, 2 number priority, 3 number priority, 4 number priority, 5 number priority, 6 number priority to 7 number priority, and the priority order of forwarding the IPv6 message from the IPv6 message of 0 number priority, the IPv6 message of 1 number priority, the IPv6 message of 2 number priority, the IPv6 message of 3 number priority, the IPv6 message of 4 number priority, the IPv6 message of 5 number priority, and the IPv6 message of 6 number priority to the IPv6 message of 7 number priority is sequentially decreased.
Further, the format of the TLV record as QoS information includes a type field, a length field, a priority field, and a reserved field, which are sequentially arranged;
the reserved field value is filled with 0 when sending IPv6 messages and ignored when receiving IPv6 messages.
Further, the method for queue scheduling of the IPv6 message by the output interface of the End SID node includes:
firstly, a plurality of priority queues are preset, the priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority.
Further, the method for the End SID node to send the IPv6 message in the priority queue to the destination node includes:
and the End SID node sends the IPv6 messages in each priority queue to a destination node according to the order of priority from high to low.
The embodiment of the invention also provides a device for improving QoS of the flow forwarding, which comprises the following steps:
an adding module, configured to add a TLV record as QoS information in the routing extension header SRH, where the TLV record is used to record a QoS attribute of the IPv6 packet, and the QoS attribute includes a priority of the IPv6 packet;
the identification module is used for identifying the priority of the IPv6 message and storing the priority into the TLV record;
the sending module is used for sending the IPv6 message to the End SID node;
an output interface for queue scheduling the IPv6 message; the End SID node is also used for presetting a plurality of priority queues, the priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority;
the transmission module is used for transmitting the IPv6 message in the priority queue to a destination node; and the IPv6 messages in the priority queues are sent to the destination node in the order of priority from high to low.
The embodiment of the invention also provides a device for improving the QoS of the flow forwarding, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the method for improving the QoS of the flow forwarding is realized when the processor executes the program.
The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions for executing the method for improving QoS of the traffic forwarding.
The method of the embodiment of the invention comprises the following steps: adding a TLV record serving as QoS information in a routing extension header SRH, wherein the TLV record is used for recording the QoS attribute of the IPv6 message, and the QoS attribute comprises the priority of the IPv6 message; by adding the TLV record serving as the QoS information in the routing extension header SRH inserted in the IPv6 message, when the End SID node forwards the IPv6 message, according to the priority information carried in the QoS TLV, the End SID node for forwarding the IPv6 message performs message scheduling according to the priority in the forwarding process, so that the IPv6 message with low delay and high reliability is forwarded preferentially, and the time delay and the packet loss probability of the IPv6 message are reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a networking architecture diagram based on the SRv6 protocol;
FIG. 2 is a schematic diagram of a partial format of an IPv6 message within SRv 6;
fig. 3 is a schematic diagram of a format of the TLV record as QoS information according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an implementation scenario of an embodiment of the present invention;
fig. 5 is a partial flow chart of a method of improving QoS for traffic forwarding according to an embodiment of the present invention;
fig. 6 is a block diagram of a device for improving QoS for traffic forwarding according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.
The embodiment of the invention provides a method for improving QoS (quality of service) of flow forwarding, which specifically comprises the following steps:
as shown in fig. 2, a TLV record as QoS information is added to the routing extension header SRH, where the TLV record is used to record a QoS attribute of the IPv6 packet, and the QoS attribute includes a priority of the IPv6 packet. The length and meaning of the fields in the routing extension header SRH are shown in table 2:
TABLE 2
The method comprises the steps that a TLV record serving as QoS information is added in a routing extension header SRH inserted in an IPv6 message in SRv, wherein the TLV record is used for recording QoS attributes of the IPv6 message, the QoS attributes comprise priorities of the IPv6 message, and the priorities of the IPv6 message are multiple priorities. In one embodiment, the priority of the IPv6 message is divided into 8 priorities, which are respectively 0 # priority, 1 # priority, 2 # priority, 3 # priority, 4 # priority, 5 # priority, 6 # priority to 7 # priority, and the priority order of forwarding the 0 # priority IPv6 message, 1 # priority IPv6 message, 2 # priority IPv6 message, 3 # priority IPv6 message, 4 # priority IPv6 message, 5 # priority IPv6 message, 6 # priority IPv6 message to 7 # priority IPv6 message is sequentially decreased. As shown in fig. 3, in one embodiment, the format of the TLV record as QoS information includes a type field, a length field, a priority field, and a reserved field sequentially arranged in sequence;
the Type field Type is provided with 8 bits, and the value of the Type field Type is the Type of data;
the length field length has 8 bits, and the value of the length field length is the length of the data;
the priority field PRE has 3 bits, and has a value of 0, 1, 2, 3, 4, 5, 6, or 7, where 0, 1, 2, 3, 4, 5, 6, or 7 is the priority No. 0, priority No. 1, priority No. 2, priority No. 3, priority No. 4, priority No. 5, priority No. 6, or priority No. 7, respectively;
the reserved field has 13 bits, the value of which is filled with 0 when sending IPv6 messages and ignored when receiving IPv6 messages. As shown in table 1:
TABLE 1
As shown in fig. 5, in one embodiment, the method for improving QoS for traffic forwarding further includes:
and step 101, the source node in the SRv6 identifies the priority of the IPv6 message and stores the priority in the TLV record.
The source node in SRv is a SRv source node, and when the source node in SRv receives an IPv6 message sent by an external node, the priority of the IPv6 message is identified, and the priority of the IPv6 message is stored in a priority field of a TLV record of QoS information added in a routing extension header SRH of the IPv6 message. The method for identifying the priority of the IPv6 message by the source node in SRv comprises the following steps: and formulating a priority by using a flow classification strategy issued by the control module, and matching the flow classification strategy to obtain the priority when the message passes through the source node. The control module can be a router or switch communicatively coupled to the source node within SRv. The external node refers to a node outside the SR path, and may be a router or a switch. Other fields in the routing extension header SRH are filled together when the routing extension header SRH is encapsulated.
In step 102, the source node in SRv sends an IPv6 message to the End SID node.
Wherein, the source node in SRv sends the IPv6 message with the priority to the End SID node.
And step 103, the output interface of the End SID node performs queue scheduling on the IPv6 message.
After receiving an IPv6 message with a priority of the End SID node, the output interface of the End SID node performs queue scheduling on the IPv6 message, and in one embodiment, the method for performing queue scheduling on the IPv6 message by using the output interface of the End SID node includes:
firstly, a plurality of priority queues such as 8 priority queues are preset, the priority queues such as 8 priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority.
And 104, the End SID node sends the IPv6 message in the priority queue to a destination node.
In one embodiment, the method for the End SID node to send the IPv6 message in the priority queue to the destination node includes:
and the End SID node sends the IPv6 messages in each priority queue to a destination node according to the order of priority from high to low.
Therefore, when in priority scheduling, the IPv6 message is delivered to the corresponding queue according to the priority corresponding to the priority in the priority field of the TLV record, so that the scheduling priority of the IPv6 message is ensured.
In the scene diagram of an example of the method of the embodiment of the present invention shown in fig. 4, a SRv architecture exists between a- > D, B- > D and C- > D, three IPv6 message flows (1), (2), (3) respectively enter an a node, a B node, and a C node to reach a destination node D device, where the IPv6 message flow (1) is a low-latency and high-reliability IPv6 message flow, the IPv6 message flow (2) is a high-reliability IPv6 message flow, and the IPv6 message flow (3) is a common internet surfing IPv6 message flow.
1. The source node one in SRv, SRv source1, recognizes the IPv6 packet flow (1), carries a TLV record as QoS information when encapsulating the SRH, where the priority is 0, the source node two in SRv, SRv source2, recognizes the IPv6 packet flow (2), encapsulates the SRH, where the priority is 1, recognizes the TLV record (3) as QoS information in SRv6 source3, and encapsulates the SRH, where the priority is 2.
2. The queue scheduling for QoS information exists on the outbound interface of the End4 node serving as the End SID node, when the IPv6 message flow (1) is received, the message is dropped into the highest priority queue preset by the corresponding outbound interface according to the priority carried by the TLV record serving as the QoS information in the SRH, when the IPv6 message flow (2) is received, the message is dropped into the next highest priority queue preset by the corresponding outbound interface according to the priority carried by the TLV record serving as the QoS information in the SRH, when the IPv6 message flow (3) is received, the message is dropped into the middle priority queue preset by the corresponding outbound interface according to the priority carried by the TLV record serving as the QoS information in the SRH.
3. When the End4 node goes out of the interface to send the message, firstly, the message of the highest priority queue is sent, when the message is not in the highest priority queue, the message of the next highest priority queue is sent, and when the messages are not in the highest priority queue and the next highest priority queue, the message in the middle priority queue is sent, so that the IPv6 message flow (1) is guaranteed to be sent forever, and the time delay of the IPv6 message is smaller. When the interface is congested, the message of the IPv6 message flow (3) is discarded first, so that the other two IPv6 message flows can be forwarded normally.
As shown in fig. 6, an embodiment of the present invention further provides a device for improving QoS for forwarding traffic, including:
an adding module 71, configured to add a TLV record as QoS information in the routing extension header SRH, where the TLV record is used to record a QoS attribute of the IPv6 packet, and the QoS attribute includes a priority of the IPv6 packet.
The identifying module 72 is configured to identify the priority of the IPv6 packet, and store the priority in the TLV record.
A sending module 73, configured to send an IPv6 packet to an End SID node;
an outbound interface 74 for queue scheduling the IPv6 message; the End SID node is also used for presetting a plurality of priority queues, the priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority;
a transmission module 75, configured to send the IPv6 packet in the priority queue to a destination node; and the IPv6 messages in the priority queues are sent to the destination node in the order of priority from high to low.
The technical effects of the device of the embodiment of the invention are as follows:
when the TLV record as QoS information is added in SRH, the End SID node needs to transmit the IPv6 message according to the priority of the TLV record as QoS information in SRH head as the transmitting priority of the message in the device, and the message scheduling is carried out according to the priority.
The embodiment of the invention also provides a device for improving the QoS of the flow forwarding, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the method for improving the QoS of the flow forwarding is realized when the processor executes the program.
In general, the traffic forwarding device for improving QoS according to the embodiment of the present invention mainly includes a plurality of branched transmission links, where the transmission links have another node, a source node and an End SID node in SRv, which are sequentially connected, and all the End SID nodes in the transmission links are connected to another End SID node connected to the destination node.
The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions for executing the method for improving QoS of the traffic forwarding.
In the present embodiment, the storage medium may include, but is not limited to: a usb disk, a read-only memory (ROM, readOnlyMemory), a random access memory (RAM, randomAccessMemory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or modulated data signals such as a carrier wave or other transport mechanism.
Claims (7)
1. A method for improving QoS for traffic forwarding, comprising:
adding a TLV record serving as QoS information in a routing extension header SRH, wherein the TLV record is used for recording the QoS attribute of the IPv6 message, and the QoS attribute comprises the priority of the IPv6 message;
the source node in SRv identifies the priority of the IPv6 message and stores the priority in the TLV record;
the source node in SRv sends IPv6 message to End SID node;
the output interface of the End SID node performs queue scheduling on the IPv6 message; comprising the following steps: firstly, presetting a plurality of priority queues, wherein the priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority of the End SID node;
the End SID node sends the IPv6 message in the priority queue to a destination node, and the method comprises the following steps: and the End SID node sends the IPv6 messages in each priority queue to a destination node according to the order of priority from high to low.
2. The method for improving QoS for traffic forwarding according to claim 1, wherein the priority of the IPv6 message is a plurality of priorities.
3. The method for improving QoS for traffic forwarding according to claim 2, wherein,
the priority of the IPv6 message is divided into 8 priorities, namely, a 0-priority, a 1-priority, a 2-priority, a 3-priority, a 4-priority, a 5-priority and a 6-priority to a 7-priority, and the priority order of forwarding the 0-priority IPv6 message, the 1-priority IPv6 message, the 2-priority IPv6 message, the 3-priority IPv6 message, the 4-priority IPv6 message, the 5-priority IPv6 message and the 6-priority IPv6 message to the 7-priority IPv6 message is sequentially decreased.
4. The method for improving QoS according to claim 1, wherein the format of the TLV record as QoS information includes a type field, a length field, a priority field, and a reserved field sequentially arranged in order;
the reserved field value is filled with 0 when sending IPv6 messages and ignored when receiving IPv6 messages.
5. An apparatus for improving QoS for traffic forwarding, comprising:
an adding module, configured to add a TLV record as QoS information in the routing extension header SRH, where the TLV record is used to record a QoS attribute of the IPv6 packet, and the QoS attribute includes a priority of the IPv6 packet;
the identification module is used for identifying the priority of the IPv6 message and storing the priority into the TLV record;
the sending module is used for sending the IPv6 message to the End SID node;
an output interface for queue scheduling the IPv6 message; the End SID node is also used for presetting a plurality of priority queues, the priority queues are in one-to-one correspondence with the priority of the IPv6 message, and the End SID node sends the received IPv6 message into the priority queue corresponding to the priority according to the priority;
the transmission module is used for transmitting the IPv6 message in the priority queue to a destination node; and the IPv6 messages in the priority queues are sent to the destination node in the order of priority from high to low.
6. A traffic forwarding QoS enhancing device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the traffic forwarding QoS enhancing method according to any of claims 1-4 when executing the program.
7. A computer readable storage medium storing computer executable instructions which when executed by a processor are adapted to perform the method of improving QoS for traffic forwarding according to any of claims 1-4.
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