WO2021174958A1 - 报文转发方法、设备、系统、网络设备和存储介质 - Google Patents

报文转发方法、设备、系统、网络设备和存储介质 Download PDF

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WO2021174958A1
WO2021174958A1 PCT/CN2020/136929 CN2020136929W WO2021174958A1 WO 2021174958 A1 WO2021174958 A1 WO 2021174958A1 CN 2020136929 W CN2020136929 W CN 2020136929W WO 2021174958 A1 WO2021174958 A1 WO 2021174958A1
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message
bier
multicast
configuration information
deterministic service
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PCT/CN2020/136929
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English (en)
French (fr)
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熊泉
陈然
喻敬海
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中兴通讯股份有限公司
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Priority to EP20923609.0A priority Critical patent/EP4117234A4/en
Priority to US17/909,472 priority patent/US11882021B2/en
Publication of WO2021174958A1 publication Critical patent/WO2021174958A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/16Multipoint routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1886Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40Bus networks
    • H04L12/407Bus networks with decentralised control
    • H04L12/413Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD)
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/50Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/56Routing software
    • H04L45/566Routing instructions carried by the data packet, e.g. active networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/74Address processing for routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22Parsing or analysis of headers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00Encapsulation of packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/38Flow based routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/50Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H04L45/507Label distribution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0289Congestion control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution
    • H04W28/084Load balancing or load distribution among network function virtualisation [NFV] entities; among edge computing entities, e.g. multi-access edge computing

Definitions

  • the embodiments of the present disclosure relate to the field of communication technologies, and in particular to a method, device, system, network device, and storage medium for message forwarding.
  • Bit Index Explicit Replication is a multicast data forwarding technology that defines a new network multicast architecture, which has the advantages of simple deployment, rapid convergence, and support for ultra-large-capacity services.
  • BIER technology can be combined with virtual private network (Virtual Private Network, VPN) technology to achieve perfect VPN multicast, so that under the new network architecture, it can provide various types of big video services such as Internet live broadcast and Internet Protocol Television (Internet Protocol Television) under the new network architecture.
  • IPTV Internet Protocol Television
  • 5G 5th Generation Wireless Systems
  • 3GPP 3rd Generation Partnership Project
  • different 5G services have differentiated requirements for the network. Big video Other multicast services have high requirements on bandwidth, delay and reliability. Therefore, it is necessary to provide deterministic delay and reliability services for multicast based on BIER technology to meet the requirements of low delay and low packet loss rate in 5G networks.
  • the embodiments of the present disclosure provide a message forwarding method, device, system, network device, and storage medium, which can provide deterministic business services for multicast messages based on the BIER technology.
  • the embodiments of the present disclosure provide a message forwarding method, which is applied to the first device, and includes: according to the deterministic service requirements for the multicast message that displays the copy of the BIER based on the bit index, the BIER of the multicast message
  • the header information carries the corresponding deterministic service configuration information; the multicast message carrying the BIER header information is sent.
  • an embodiment of the present disclosure provides a message forwarding method, which includes: the first device displays the deterministic service requirements for the multicast message of the BIER copy based on the bit index in the BIER header information of the multicast message Carrying the corresponding deterministic service configuration information, sending the multicast message carrying the BIER header information; the second device obtains the deterministic service configuration information carried in the BIER header information from the received multicast message carrying the BIER header information, and according to Deterministic service configuration information for message processing.
  • an embodiment of the present disclosure provides a first device, including: a message encapsulation module, configured to display the BIER of the multicast message according to the deterministic service requirements for the multicast message of the BIER copy based on the bit index
  • the header information carries the corresponding deterministic service configuration information; the message sending module is set to send the multicast message carrying the BIER header information.
  • the embodiments of the present disclosure provide a message forwarding node device, including: a first device configured to display the deterministic service requirements for multicast messages that replicate BIER based on a bit index, in the multicast message
  • the BIER header information carries the corresponding deterministic service configuration information, and the multicast message carrying the BIER header information is sent; the second device is set to obtain the confirmation carried in the BIER header information from the received multicast message carrying the BIER header information Service configuration information, and perform message processing based on the deterministic service configuration information.
  • an embodiment of the present disclosure provides a message forwarding system, including: a memory and a processor; the memory is configured to store a program; the processor is configured to read the executable program code stored in the memory to execute any one of the foregoing The message forwarding method of the aspect.
  • the first device can carry the deterministic service configuration information in the BIER header information according to the BIER multicast deterministic service requirements, and send the deterministic service configuration information.
  • the BIER multicast message of the service configuration information provides deterministic delay and reliability services for multicast based on BIER technology to meet the requirements of low delay and low packet loss rate in the 5G network.
  • Figure 1 shows a schematic diagram of the message format of the BIER header in a multi-protocol label switching MPLS network.
  • Figure 5 shows a schematic diagram of the message format of the flow identifier in the BIER header.
  • Figure 6 shows a schematic diagram of the message format of the serial number in the BIER header.
  • FIG. 7 shows a schematic flowchart of a message forwarding method according to an embodiment of the present disclosure.
  • FIG. 8 shows a schematic flowchart of a message forwarding method according to another embodiment of the present disclosure.
  • FIG. 10 shows a schematic diagram of a message processing flow of a head node device according to an embodiment of the present disclosure.
  • Figure 14 shows a flow chart of the method for implementing the BIER deterministic service on the MPLS data plane.
  • Fig. 17 shows a schematic structural diagram of a first device of an embodiment of the present disclosure.
  • FIG. 18 shows a schematic structural diagram of a second device of an embodiment of the present disclosure.
  • FIG. 19 is a structural diagram showing an exemplary hardware architecture of a computing device capable of implementing the method and device for forwarding a message according to an embodiment of the present disclosure.
  • the Internet Engineering Task Force (IETF) Request For Comments (RFC) document 8279 defines the BIER technology, which can divide the multicast network into the BIER domain, including the first node device ( Bit-Forwarding Ingress Router, BFIR), intermediate node equipment (Bit-Forwarding Forwarding Router, BFR), and tail node equipment (Bit-Forwarding Egress Routers, BFER).
  • BFIR Bit-Forwarding Ingress Router
  • BFR Bit-Forwarding Forwarding Router
  • BFER Bit-Forwarding Egress Routers
  • the BIER header is encapsulated for the multicast message.
  • the BIER header contains the bit identification information indicating each egress node of the multicast message.
  • the multicast message is in the BIER domain.
  • the BIER forwarding table is searched through the bit index in the BIER header, and the multicast packet is copied and forwarded to the corresponding egress node of each bit index.
  • the BIER data plane may include multiple different types according to different transmission protocols. For example, Multi-Protocol Label Switching (MPLS) data plane, IPv6 data plane, and other non-MPLS data planes such as Ethernet data plane.
  • MPLS Multi-Protocol Label Switching
  • IPv6 IPv6
  • Ethernet Ethernet data plane.
  • MPLS Multi-Protocol Label Switching
  • the following uses the MPLS data plane as an example to briefly describe the BIER header message format based on the MPLS data plane specified by IETF RFC8296.
  • FIG. 1 shows a schematic diagram of the message format of the BIER header in the MPLS network.
  • the BIFT-id field in the BIER header is a bit index that shows the copy message forwarding table (Bit Index Forwarding Table, BIFT) identifier, and the bitstring field indicates the specific forwarding path of the multicast stream.
  • Each forwarding node (Bit-Index Forwarding Table, BIFT) Forwarding Forwarding Router (BFR) can look up the forwarding table according to the bits (BitPosition, BP) in the bitstring and perform copying and forwarding operations.
  • DetNet Deterministic Networking
  • QoS Quality of Service
  • the draft-ietf-detnet-mpls-04 of the IETF DetNet working group specifies the message format of the MPLS data plane.
  • the following describes the message format of the MPLS data plane with reference to Figures 2 and 3.
  • Fig. 2 shows a schematic diagram of the message format of the deterministic service on the MPLS forwarding plane;
  • Fig. 3 shows a schematic diagram of the message format of the deterministic service control word in Fig. 2.
  • the MPLS message format extends 3 fields in the original MPLS, namely DetNet Control Word, S-Label, and F-Labels.
  • the deterministic service control word field contains the sequence number field (Sequence Number) of the message.
  • Sequence Number is used to implement replication, elimination, and ordering functions (Packet Replication, Elimination, Ordering) in DetNet technology
  • S-Label is used to identify DetNet streams.
  • F-Labels is used to realize the deterministic path function in DetNet technology and realize display routing.
  • the message format of DetNet does not consider the BIER multicast service, so the forwarding of the BIER multicast deterministic service cannot be realized.
  • the present disclosure proposes a message forwarding method to realize the forwarding of the BIER multicast deterministic service.
  • Fig. 4 shows a schematic diagram of the message format of the expanded BIER header in an embodiment of the present disclosure
  • Fig. 5 shows a schematic diagram of the message format of the stream identifier in the BIER header
  • Fig. 6 shows a schematic diagram of the message format of the sequence number in the BIER header.
  • an extension flag and a deterministic service extension field (DetNet Sub tag-length-value, DetNet Sub-TLV) are added.
  • the extended identification bit D can be carried in the Reserve field in the BIER header, and the deterministic service extended field can be carried after the BIER header, or in the middle of the BIER header, such as before the BitString.
  • the extended identification bit D has a fixed number of bits, such as 1 bit.
  • the identification BIER header carries the deterministic service extension field.
  • the extended flag D when the extended flag D is set to 1, it indicates that the DetNet Sub-TLV field is extended in the BIER header, which can be used to implement the BIER multicast deterministic service.
  • the deterministic service extension field includes DetNet related information, for example, including parameter information such as DetNet Flow ID and Sequence Number.
  • FIG. 5 shows a schematic diagram of a specific message structure of a flow identifier in the deterministic service extension field
  • FIG. 6 shows a schematic diagram of a message structure of a sequence number in the deterministic service extension field.
  • the Flow ID can be used to uniquely identify a BIER deterministic multicast flow.
  • the Flow ID can be defined as 20 bits, 24 bits, or 28 bits, and the number of bits of the Flow ID can be customized as needed, which is not specifically limited in the embodiment of the present disclosure.
  • the deterministic service extension field can carry the serial number identification bit N, which is located in the reserved field (Reserved) of the deterministic service extension field.
  • the serial number identification bit N bit is this One of the reserved fields. When N is set to 1, it indicates that the Sequence Number field is included after the sequence number identification bit N.
  • the Sequence Number field is used to carry the sequence number of the multicast message, and the sequence number can be used for duplication, elimination and sorting of the multicast message.
  • the serial number can be defined as 16 bits or 28 bits, and the number of bits of the serial number can be customized as needed, which is not specifically limited in the embodiment of the present disclosure.
  • Fig. 7 shows a schematic diagram of a message forwarding method according to an embodiment of the present disclosure.
  • the first device is the head node device
  • the second node device is the intermediate node device or the tail node device.
  • the message forwarding method includes the following steps.
  • the first device According to the deterministic service requirement of the multicast message for displaying the copied BIER based on the bit index, the first device carries the corresponding deterministic service configuration information in the BIER header information of the multicast message, and sends the group carrying the BIER header information. Broadcast messages.
  • the second device obtains the deterministic service configuration information from the received multicast packet carrying the BIER header information, and performs packet processing according to the deterministic service configuration information.
  • the first device sends the message to the second device after carrying the deterministic service configuration information in the BIER header information according to the BIER multicast deterministic service requirement; the second device receives the message After the document, the deterministic service configuration information carried in the packet is obtained from the BIER header information, and the packet is processed according to the deterministic service configuration information, thereby providing deterministic delay and reliability for multicast based on the BIER technology Services, to achieve deterministic services provided by BIER multicast.
  • the message processing method further includes: S11, the first device carries an extended identification bit in the BIER header information, and when the extended identification bit is set, it is used to indicate that there is deterministic service configuration information in the BIER header information .
  • the extended identification bit in the BIER header is used to identify the field corresponding to the extended deterministic service configuration information, so as to realize the flexible setting of the BIER header under the premise of being compatible with the existing BIER header.
  • the first device carries a flow identifier in the deterministic service configuration information, and wherein the flow identifier uniquely identifies a BIER multicast stream.
  • the flow identification defines corresponding identification information according to the message type, and the message type includes: Internet Protocol IPv6 message, Multi-Protocol Label Switching Protocol MPLS message and Ethernet message.
  • the flow identifier is the MPLS label or the mapping value of the MPLS label;
  • the BIER-based multicast message is an Internet Protocol IPv6 message or In the case of Ethernet packets, the stream identifier is the unique stream identifier assigned by the BIER multicast stream.
  • a BIER multicast stream can be uniquely identified through the stream identifier.
  • Different types of multicast messages have different requirements for deterministic services. When processing messages according to the deterministic service configuration information, it is necessary to first identify the multicast streams in the messages.
  • the deterministic service requirements include message duplication and elimination
  • it before sending the multicast message carrying the BIER header information, it further includes: S12, the first device copies the multicast message carrying the BIER header information, And carry the message sequence number in the deterministic service configuration information.
  • the sequence number of the multicast message can be set in the deterministic service configuration information.
  • the message forwarding method further includes: S13, the first device carries a serial number identification bit in the deterministic service configuration information, and when the serial number identification bit is set, it is used to indicate the deterministic service configuration information There is a message sequence number.
  • being set means that the value is set to 1.
  • the serial number of the message in the deterministic service configuration information can be identified by the serial number identification bit.
  • serial number identification position 1
  • the serial number identification position is 0, it can indicate the deterministic service configuration information If the packet sequence number is not included, there is no need to copy and eliminate the multicast, so as to realize the flexible setting of the BIER header.
  • the first device when the BIER-based multicast message is an MPLS message or an Ethernet message, the first device generates the BIER header information according to the request annotation RFC8296 format.
  • the second device is an intermediate node device
  • the step of processing the message according to the deterministic service configuration information in step S21 may include: S51, the second device according to the flow identifier carried in the deterministic service configuration information, Identify the multicast stream from the received multicast message carrying the BIER header information, and configure reserved resources for the identified multicast stream.
  • the BIER header information is carried in the Next Header field of the IPv6 message.
  • the IPv6 message can be encapsulated according to the expanded BIER header in the embodiment of the present disclosure.
  • the BIER header information carries the MPLS label.
  • the MPLS packet can be encapsulated according to the expanded BIER header in the embodiment of the present disclosure.
  • the BIER-based multicast message may include an MPLS message or a message based on other transport protocols other than the MPLS message.
  • the BIER header information can be generated according to the request annotation RFC8296 format.
  • the head node device encapsulates the message according to the extended BIER header shown in FIG. 4 in the embodiment of the present disclosure according to the BIER multicast deterministic service requirements, and carries it in the extended BIER header.
  • the deterministic service extension field realizes that the deterministic service configuration information is carried in the BIER header, and the BIER deterministic multicast message carrying the deterministic service configuration information is sent, so that the BIER multicast service forwarding realizes the deterministic service provision.
  • FIG. 9 shows a schematic flowchart of a message forwarding method according to still another embodiment of the present disclosure. As shown in Figure 9, the message forwarding method can be applied to the second device.
  • the message forwarding method may include the following steps.
  • S210 Obtain the deterministic service configuration information carried in the BIER header information of the multicast message from the received multicast message based on the bit index display and copy BIER.
  • S220 Perform message processing according to the deterministic service configuration information.
  • the second device may be an intermediate node device or a tail node device.
  • the second device can process the multicast message according to the deterministic service configuration information carried in the message, thereby realizing the provision of deterministic service for BIER multicast service forwarding. service.
  • an extended flag bit is set in the BIER header information of the received multicast message.
  • the message forwarding method before obtaining the deterministic service configuration information carried in the multicast message in step S210, the message forwarding method further includes: S201, reading the extended flag carried in the BIER header information, and judging the extended flag Whether it is set; S202, if the extended flag is set, it is determined that the received multicast packet carries deterministic service configuration information.
  • the intermediate node device forwards the received multicast packet based on BIER.
  • multicast messages of different protocols have different requirements for reserved resources. Therefore, it is necessary to identify the BIER multicast stream according to the stream identifier, and configure reserved resources such as broadband and cache for the identified multicast stream. , To meet the requirements of the corresponding multicast message for reserved resources, so as to realize the congestion control of the deterministic service on the forwarding path node.
  • the deterministic service configuration information also carries a serial number identification bit.
  • it before acquiring the message serial number carried in the deterministic service configuration information, it further includes: judging whether the serial number identification bit is set; if the serial number identification bit is set, judging the deterministic service configuration information There is a message sequence number in.
  • serial number identification position when the serial number identification position is 1, it can be determined that there is a message serial number in the deterministic service configuration information; when the serial number identification position is 0, it can be determined that there is no message serial number in the deterministic service configuration information.
  • the second device is an intermediate node device.
  • the message forwarding method further includes: S230.
  • the intermediate node device processes the multicast message according to the deterministic service configuration information. , Carry out BIER-based message forwarding.
  • the intermediate node device after receiving the BIER-based multicast message, processes and forwards the message according to the deterministic service configuration information carried in the BIER header information; while the tail node device is receiving After arriving at the BIER-based multicast message, it is processed according to the deterministic service configuration information carried in the BIER header information, and the multicast service is forwarded after the message is decapsulated, thereby realizing the deterministic service provision of the BIER multicast message.
  • FIG. 10 shows a schematic diagram of a message processing flow of a head node device according to an embodiment of the present disclosure.
  • the message processing flow of the head node device may include: S410, the head node device obtains the deterministic service requirements of the BIER-based multicast packet; S420, encapsulates the multicast packet with the extended BIER header , Carry the deterministic service extension field in the BIER header.
  • the deterministic service extension field is used to carry deterministic service configuration information.
  • the message processing flow of the head node device in FIG. 10 reference may be made to the corresponding process in the embodiment of the message forwarding method described in the foregoing embodiment, and details are not described herein again.
  • S520 Determine whether the extended identification bit D carried in the BIER header information is set to 1, if the extended identification bit D is not set to 1, it is determined that the BIER header information does not carry deterministic service configuration information, then execute S530; if the extended identification bit D is set to 1, it is determined The BIER header information carries deterministic service configuration information, and S540 is executed.
  • S570 Forward the multicast message processed by the deterministic service information based on the BIER.
  • the message processing flow of the intermediate node device described in conjunction with FIG. 11 may refer to the corresponding process in the embodiment of the message forwarding method applied to the intermediate node device in the second device described in the foregoing embodiment, which will not be omitted here. Go into details.
  • the tail node device after receiving the multicast message, can perform processing such as duplication and elimination according to the deterministic service configuration, and then forward the multicast service carried by the message after decapsulating the message , So that the multicast service meets the deterministic service requirements.
  • the message processing flow of the tail node device described in conjunction with FIG. 12 may refer to the corresponding process in the embodiment of the packet forwarding method applied to the tail node device in the second device described in the foregoing embodiment, which will not be omitted here. Go into details.
  • Figure 13 shows a flow chart of the method for implementing the BIER deterministic service on the IPv6 data plane.
  • the method for implementing the BIER deterministic service on the IPv6 data plane may include the following steps.
  • the head node device encapsulates the IPv6 multicast packet according to the expanded BIER header in the embodiment of the present disclosure, and sends the encapsulated multicast packet.
  • the field DetNet Sub-TLV can include the BIER deterministic flow identification field Flow ID; if you also need to configure the message copy elimination function, you need to copy the message, and the field DetNet Sub-TLV also needs to carry the message sequence number ( Sequence Number) field.
  • extension flag D of the BIER header is set to 1, if it is set to 1, it means that the BIER header carries the deterministic service extension field DetNet Sub-TLV, and the multicast packet is stream-identified, and the multicast packet is determined according to the deterministic multicast Configure reserved resources and forward packets.
  • the tail node device receives the IPv6 multicast message, obtains the deterministic service configuration information in the message, processes the message according to the deterministic service configuration information, decapsulates and forwards the multicast service.
  • the tail node device after receiving the multicast message, performs flow identification according to the deterministic service configuration information, and determines whether the DetNet field carries a sequence number field, and if it does, it obtains the sequence number of the message, and copies it according to the DetNet configuration. Eliminate the processing, decapsulate the packet and forward the multicast service.
  • Figure 14 shows a flow chart of the method for implementing the BIER deterministic service on the MPLS data plane.
  • the method for implementing the BIER deterministic service on the MPLS data plane may include the following steps.
  • the head node device encapsulates the MPLS multicast packet according to the expanded BIER header in the embodiment of the present disclosure, and sends the encapsulated multicast packet.
  • data encapsulation can be performed in accordance with RFC8296, and the BIER-MPLS label is carried in the BIER header, so as to be compatible with the MPLS data plane message format.
  • the deterministic service extension field DetNet Sub-TLV is carried in the BIER header, and the deterministic service extension field may include the BIER deterministic flow identifier Flow ID.
  • the flow identifier may be an MPLS label value, or identification information corresponding to the MPLS label value obtained by mapping the label value, so as to uniquely identify a BIER deterministic multicast flow.
  • the flow ID is configured to identify the deterministic processing of the BIER flow passing through each node device, including resource reservation, etc. If the copy elimination function is configured, the message needs to be copied, and the sequence number field is sent to DetNet Sub- TLV.
  • the intermediate node device After receiving the multicast message, the intermediate node device obtains the BIER header information according to BIER-MPLS, and performs deterministic processing and forwarding on the message according to the deterministic service information carried in the BIER header information.
  • the extension flag D of the BIER header is set to 1, if it is set to 1, it means that the BIER header carries the deterministic service extension field DetNet Sub-TLV, and the multicast packet is based on the Flow ID in the DetNet Sub-TLV field Perform flow identification, reserve resources and forward packets according to deterministic multicast configuration.
  • the intermediate node device After receiving the multicast message, the intermediate node device obtains the BIER header information, and performs deterministic processing and forwarding on the message according to the deterministic service information carried in the BIER header information.
  • the BIER information can be searched according to the BIFT-id, and it can be judged whether the extension flag D of the BIER header is set to 1. If it is set to 1, it means that the BIER header carries the deterministic service extension field DetNet Sub-TLV, according to the DetNet Sub-TLV field
  • the FlowID in the flow ID identifies the multicast packet, and reserves resources and forwards the packet according to the deterministic multicast configuration.
  • the tail node device receives the multicast message, obtains the deterministic service configuration information in the message, processes the message according to the deterministic service configuration information, decapsulates and forwards the multicast service.
  • the tail node device After receiving the message, the tail node device performs flow identification according to the deterministic service configuration information, and judges whether the DetNet field carries a serial number field, and if it does, it obtains the serial number of the message, and performs processing such as duplication and elimination according to the DetNet configuration , Decapsulate the packet and forward the multicast service.
  • Fig. 16 shows a message forwarding node device according to an embodiment of the present disclosure.
  • the packet forwarding node device includes a first device and a second device.
  • the first device 1010 is configured to carry the corresponding deterministic service configuration information in the BIER header information of the multicast message according to the deterministic service requirements of the multicast message for displaying and copying the BIER based on the bit index, and send the information carrying the BIER header. Multicast packets.
  • the first device 1010 is further configured to carry an extended identification bit in the BIER header information.
  • the extended identification bit is set, it is used to indicate that there is deterministic service configuration information in the BIER header information.
  • the first device 1010 is further configured to carry a stream identifier in the deterministic service configuration information, and wherein the stream identifier can uniquely identify a BIER multicast stream.
  • the flow identification defines corresponding identification information according to the message type, and the message type includes: Internet Protocol IPv6 message, Multi-Protocol Label Switching Protocol MPLS message and Ethernet message.
  • the flow identifier is the MPLS label or the mapping value of the MPLS label;
  • the BIER-based multicast message is an Internet Protocol IPv6 message or In the case of Ethernet packets, the stream identifier is the unique stream identifier assigned by the BIER multicast stream.
  • the second device 1020 is set to process the message according to the deterministic service configuration information.
  • the specific setting is: obtain the message sequence number carried in the deterministic service configuration information, and compare the received group based on the sequence number. Broadcast messages for copying and elimination processing.
  • the deterministic service configuration information also carries the serial number identification bit
  • the second device 2020 is further configured to: before acquiring the message serial number carried in the deterministic service configuration information, determine whether the serial number identification bit is Is set; if the serial number identification bit is set, it is determined that there is a message serial number in the deterministic service configuration information.
  • the second device 1020 is an intermediate node device, and the intermediate node device is further configured to: after performing packet processing according to the deterministic service configuration information, perform packet processing based on the deterministic service configuration information. Broadcast messages and forward BIER-based messages.
  • the message encapsulation module 1100 is configured to carry the corresponding deterministic service configuration information in the BIER header information of the multicast message according to the deterministic service requirements of the multicast message for displaying and copying the BIER based on the bit index; the message sending module 1130: Set to send a multicast packet carrying BIER header information.
  • the first device is further specifically configured to: before sending the multicast message carrying the BIER header information, carry the flow identifier in the deterministic service configuration information, and wherein a BIER can be uniquely identified by the flow identifier. Multicast streaming.
  • the message is encapsulated according to the extended BIER header in the embodiment of the present disclosure, and the deterministic service extension is carried in the extended BIER header.
  • the configuration acquisition module 1210 is configured to obtain the deterministic service configuration information carried in the BIER header information from the received multicast message carrying the BIER header information; the message processing module 1220 is configured to process the message according to the deterministic service configuration information .
  • the BIER header information of the multicast message is provided with an extended identification bit
  • the second device may further include: an extended identification judgment module, which is configured to, before obtaining the deterministic service configuration information carried in the multicast message, Read the extended identification bit carried in the BIER header information to determine whether the extended identification bit is set; the information determining module is set to determine that the received multicast packet carries deterministic service configuration information if the extended identification bit is set.
  • the second device is an intermediate node device.
  • the intermediate node device may further include: a message forwarding module, configured to perform a message forwarding module on the received multicast message if the extended flag bit is not set. Packet forwarding based on BIER.
  • the message processing module 1200 may specifically include: a duplication elimination unit, configured to obtain the message sequence number carried in the deterministic service configuration information, and perform processing on the received multicast message based on the message sequence number. Copy and delete processing.
  • the deterministic service configuration information carries a serial number identification bit
  • the second device may further include: a serial number identification determination module configured to determine before obtaining the message serial number carried in the deterministic service configuration information Whether the serial number identification bit is set, if the serial number identification bit is set, it is determined that there is a message serial number in the deterministic service configuration information.
  • the second device is an intermediate node device
  • the message forwarding module of the intermediate node device is further configured to perform BIER-based message processing on multicast messages after message processing according to deterministic service configuration information. Text forwarding.
  • the second device is a tail node device
  • the tail node device may further include: a service forwarding module configured to obtain and forward the multicast service carried by the processed multicast packet.
  • the second device when the second device is an intermediate node device, after receiving a BIER-based multicast message, it can process and forward the message according to the deterministic service configuration information carried in the BIER header information, thereby Realize the deterministic service provision of multicast packets; when the second device is a tail node device, after receiving a BIER-based multicast packet, it can identify the BIER multicast stream and perform duplication and elimination according to the deterministic service configuration Wait for processing, decapsulate the message and forward the multicast service to realize the deterministic service function in the BIER multicast technology.
  • the first node device in order to meet business requirements such as deterministic services, can use the extended BIER header information to send data in BIER according to the deterministic service requirements.
  • the multicast message carries the deterministic service information corresponding to the deterministic service requirement; after receiving the deterministic multicast stream, the intermediate node device performs flow identification on the message, so as to reserve resources and forward the message according to the deterministic multicast configuration ; After receiving the deterministic multicast stream, the tail node obtains the extended deterministic service configuration information, processes the message according to the configuration, and decapsulates the message before forwarding the multicast service, so that the BIER multicast service can be forwarded Realize deterministic business functions, so as to provide deterministic delay and reliability services for multicast, and meet the requirements of low delay and low packet loss rate in 5G networks.
  • FIG. 19 is a structural diagram showing an exemplary hardware architecture of a computing device capable of implementing the method and device for forwarding a message according to an embodiment of the present disclosure.
  • the computing device 1400 includes an input device 1401, an input interface 1402, a central processing unit 1403, a memory 1404, an output interface 1405, and an output device 1406.
  • the input interface 1402, the central processing unit 1403, the memory 1404, and the output interface 1405 are connected to each other through the bus 1410, and the input device 1401 and the output device 1406 are connected to the bus 1410 through the input interface 1402 and the output interface 1405, respectively, and then to the computing device 1400 The other components are connected.
  • the input device 1401 receives input information from the outside, and transmits the input information to the central processing unit 1403 through the input interface 1402; the central processing unit 1403 processes the input information based on the computer executable instructions stored in the memory 1404 to generate output Information, the output information is temporarily or permanently stored in the memory 1404, and then the output information is transmitted to the output device 1406 through the output interface 1405; the output device 1406 outputs the output information to the outside of the computing device 1400 for use by the user.
  • the computing device 1400 shown in FIG. 19 may be implemented as a message forwarding system.
  • the message forwarding system may include: a memory configured to store a program; a processor configured to run in the memory The stored program is used to execute the message forwarding method described in any one of the foregoing embodiments of the present disclosure described in the foregoing embodiment.
  • an embodiment of the present disclosure includes a computer program product, which includes a computer program tangibly embodied on a machine-readable medium, and the computer program includes program code for executing the method shown in the flowchart.
  • the computer program may be downloaded and installed from the network, and/or installed from a removable storage medium.
  • Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • the term computer storage medium includes volatile and non-volatile data implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or Any other medium used to store desired information and that can be accessed by a computer.
  • communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media. .

Abstract

本公开实施例公开了一种报文转发方法、设备、系统、网络设备和存储介质。该方法包括:根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息;发送携带BIER头信息的组播报文。

Description

报文转发方法、设备、系统、网络设备和存储介质 技术领域
本公开实施例涉及通信技术领域,具体地涉及一种报文转发方法、设备、系统、网络设备和存储介质。
背景技术
位索引显式复制(Bit Index Explicit Replication,BIER)是一种组播数据转发技术,其通过对网络新型组播架构进行定义,具有部署简单,收敛迅速,支持超大容量业务的优点。BIER技术可与虚拟专用网络(Virtual Private Network,VPN)技术结合,实现完善的VPN组播,从而在新的网络架构下,为各类大视频业务如互联网直播、互联网协议电视(Internet Protocol Television,IPTV)等提供高效的组播解决方案,从而提升网络效率。
按照第三代合作伙伴项目(The 3rd Generation Partnership Project,3GPP)标准对第五代移动通信技术(The 5th Generation Wireless Systems,5G)技术的定义,不同的5G业务对网络存在差异化要求,大视频等组播业务对带宽,时延及可靠性都有较高要求。因此,需要为基于BIER技术的组播提供确定性时延及可靠性服务,以达到5G网络中低时延,低丢包率的要求。
发明内容
本公开实施例提供一种报文转发方法、设备、系统、网络设备和存储介质,可以为基于BIER技术的组播报文提供确定性业务服务。
第一方面,本公开实施例提供一种报文转发方法,应用于第一设备,包括:根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息;发送携带 BIER头信息的组播报文。
第二方面,本公开实施例提供一种报文转发方法,应用于第二设备,包括:从接收的携带BIER头信息的组播报文中,获取基于位索引显示复制BIER头信息中携带的确定性业务配置信息;根据BIER头信息携带的确定性业务配置信息进行报文处理。
第三方面,本公开实施例提供一种报文转发方法,包括:第一设备根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带BIER头信息的组播报文;第二设备从接收的携带BIER头信息的组播报文中,获取BIER头信息中携带的确定性业务配置信息,并根据确定性业务配置信息进行报文处理。
第四方面,本公开实施例提供一种第一设备,包括:报文封装模块,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息;报文发送模块,设置为发送携带BIER头信息的组播报文。
第五方面,本公开实施例提供一种第二设备,包括:配置获取模块,设置为从接收的携带BIER头信息的组播报文中,获取BIER头信息中携带的确定性业务配置信息;报文处理模块,设置为根据确定性业务配置信息进行报文处理。
第六方面,本公开实施例提供一种报文转发节点设备,包括:第一设备,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带BIER头信息的组播报文;第二设备,设置为从接收的携带BIER头信息的组播报文中,获取BIER头信息中携带的确定性业务配置信息,并根据确定性业务配置信息进行报文处理。
第七方面,本公开实施例提供一种报文转发系统,包括:存储器和处理器;该存储器设置为存储程序;该处理器设置为读取存储器中存储的可 执行程序代码以执行上述任一方面的报文转发方法。
第八方面,本公开实施例提供一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当指令在计算机上运行时,使得计算机执行上述任一方面的报文转发方法。
根据本公开实施例的报文转发方法、设备、系统、网络设备和存储介质,第一设备可以根据BIER组播确定性业务需求,在BIER头信息中携带确定性业务配置信息,并发送携带确定性业务配置信息的BIER组播报文,为基于BIER技术的组播提供确定性时延及可靠性服务,以达到5G网络中低时延,低丢包率的要求。
附图说明
附图是用来提供对本公开的进一步理解,并且构成说明书的一部分,与下面的具体实施方式一起用于解释本公开,但并不构成对本公开的限制。
图1示出多协议标签交换MPLS网络中BIER头的报文格式示意图。
图2示出确定性业务在MPLS转发面的报文格式示意图。
图3示出图2中确定性业务控制字的报文格式示意图。
图4示出了本公开实施例中经扩展的BIER头的报文格式示意图;
图5示出BIER头中流标识的报文格式示意图。
图6示出BIER头中序列号的报文格式示意图。
图7示出本公开一实施例的报文转发方法的流程示意图。
图8示出本公开另一实施例的报文转发方法的流程示意图。
图9示出本公开再一实施例的报文转发方法的流程示意图。
图10示出本公开实施例的首节点设备的报文处理流程示意图。
图11示出本公开实施例的中间节点设备的报文处理流程示意图。
图12示出本公开实施例的尾节点设备的报文处理流程示意图。
图13示出互联网协议IPv6数据面BIER确定性业务的实现方法流程图。
图14示出MPLS数据面BIER确定性业务的实现方法流程图。
图15示出以太网数据面的BIER确定性业务的实现方法流程图。
图16示出本公开实施例的报文转发节点设备的结构示意图。
图17示出本公开实施例的第一设备的结构示意图。
图18示出本公开实施例的第二设备的结构示意图。
图19是示出能够实现根据本公开实施例的报文转发方法和设备的计算设备的示例性硬件架构的结构图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是,此处所描述的具体实施方式仅用于说明和解释本公开,并不用于限制本公开。对于本领域技术人员来说,本公开可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本公开的示例来提供对本公开更好的理解。
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
为了更好地理解本公开,下面将结合附图,详细描述根据本公开实施例的报文转发方法、设备、系统、网络设备和存储介质,应注意,这些实施例并不是用来限制本公开公开的范围。
在本公开实施例中,互联网工程任务组(Internet Engineering Task  Force,IETF)请求注解(Request For Comments,RFC)文档8279定义的BIER技术,可以将组播网络划分为BIER域,包括首节点设备(Bit-Forwarding Ingress Router,BFIR)、中间节点设备(Bit-Forwarding Forwarding Router,BFR)以及尾节点节点设备(Bit-Forwarding Egress Routers,BFER)。
在控制面(Control Plane),BIER为网络域内的每个节点分配唯一的bit位标识,相对比传统基于组播路由协议构建分发树的转发模式,BIER采用位索引转发路由表(Bit-indexed Forward Routing Table,BFRT)进行转发。
在数据面(Data Plane),组播报文进入BIER域时为组播报文封装BIER头,BIER头包含表示该组播报文每个出口节点的bit位标识信息,组播报文在BIER域内转发时,通过BIER头中的bit位索引查找BIER转发表将组播报文向每个bit位索引相应的出口节点复制转发。
在一些实施例中,按照传输协议不同,BIER数据面可以包括多种不同类型。例如多协议标签交换(Multi Protocol Label Switching,MPLS)数据面、IPv6数据面和其他非MPLS数据面例如以太网数据面等。下面以MPLS数据面为例,简要描述IETF RFC8296规定的基于MPLS数据面的BIER头报文格式。
图1示出MPLS网络中BIER头的报文格式示意图。如图1所示,BIER报头中的BIFT-id字段为位索引显示复制报文转发表(Bit Index Forwarding Table,BIFT)标识,bitstring字段表示组播流的具体转发路径,各转发节点(Bit-Forwarding Forwarding Router,BFR)可以根据bitstring中比特位(BitPosition,BP)查找转发表并执行复制、转发操作。
为了满足确定性服务等的业务需求,IETF RFC8655提出确定性业务(Deterministic Networking,DetNet)的相关技术架构,为二层桥和三层路由网络提供确定性服务,服务等级(Quality of Service,QoS)要求包括确定性时延上限,低丢包率,降低抖动和高可靠性等。
IETF DetNet工作组草案draft-ietf-detnet-mpls-04,规定MPLS数据面的报文格式。下面结合图2和图3,描述MPLS数据面的报文格式。图2示出确定性业务在MPLS转发面的报文格式示意图;图3示出图2中确定性业务控制字的报文格式示意图。
如图2所示,该MPLS报文格式在原有MPLS中扩展了3个字段,分别为确定性业务控制字(DetNet Control Word)、S标签(S-Label)及F标签(F-Labels)。如图3所示,确定性业务控制字字段中包含报文的序列号字段(Sequence Number)。
其中,Sequence Number用于实现DetNet技术中的复制、消除及排序功能(Packet Replication,Elimination,Ordering),以及S-Label用于识别DetNet流。F-Labels用于实现DetNet技术中的确定性路径功能,实现显示路由。
目前,DetNet的报文格式未考虑到BIER组播业务,因此无法实现BIER组播确定性业务的转发。为了实现对BIER组播业务的确定性业务提供,本公开提出一种报文转发方法,以实现对BIER组播确定性业务的转发。
在本公开实施例中,可以对组播流的BIER头进行扩展,通过扩展的BIER头加入DetNet确定性技术相关功能。下面通过图4-图6,描述扩展的BIER头的报文格式。
图4示出了本公开实施例中经扩展的BIER头的报文格式示意图;图5示出BIER头中流标识的报文格式示意图;图6示出BIER头中序列号的报文格式示意图。
如图4所示,在BIER头的报头信息中,增加扩展标识位和确定性业务扩展字段(DetNet Sub tag-length-value,DetNet Sub-TLV)。其中,扩展标识位D可以携带于BIER头中的保留(Reserve)字段中,确定性业务扩展字段可以携带于BIER头后,也可以在携带于BIER头中间,例如BitString前。
其中,扩展标识位D具有固定数量的比特位,例如1比特。通过对扩展标识位D设置第一预定值,标识BIER头中携带有确定性业务扩展字段。作为一个示例,当扩展标识位D置1时,表明BIER头中扩展了DetNet Sub-TLV字段,可以用于实现BIER组播确定性业务。
继续参考图4,在BIER头的报头信息中,确定性业务扩展字段包含DetNet的相关信息,例如包括DetNet流标识(Flow ID)及序列号(Sequence Number)等参数信息。
图5示出确定性业务扩展字段中流标识的具体报文结构示意图;图6示出确定性业务扩展字段中序列号的报文结构示意图。
在图5中,Flow ID可以用于唯一识别一个BIER确定性组播流。示例性地,Flow ID可以定义为20比特,24比特或者28比特,Flow ID的比特位数可以根据需要进行自定义,本公开实施例不做具体限定。
继续参考图5,确定性业务扩展字段中可以携带序列号标识位N,序列号标识位N位于确定性业务扩展字段的保留字段(Reserved)中,示例性地,序列号标识位N比特为该保留字段的其中一位,当N置1时,表明序列号标识位N之后包含Sequence Number字段。
如图6所示,Sequence Number字段用于携带组播报文的序列号,该序列号可以用于对组播报文的复制、消除及排序。示例性地,序列号可以定义为16比特或28比特,序列号的比特位数可以根据需要进行自定义,本公开实施例不做具体限定。
基于上述扩展后的组播流的BIER头信息,详细介绍本公开实施例的报文转发方法。图7示出本公开一实施例的报文转发方法示意图。在下面实施例的描述中,第一设备为首节点设备,第二节点设备为中间节点设备或尾节点设备。该报文转发方法包括如下步骤。
S10,第一设备根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带BIER头信息的组播报文。
S20,第二设备从接收的携带BIER头信息的组播报文中,获取该确定性业务配置信息,并根据确定性业务配置信息进行报文处理。
根据本公开实施例的报文转发方法,第一设备根据BIER组播确定性业务需求,在BIER头信息中携带确定性业务配置信息后,向第二设备发送该报文;第二设备接收报文后,从该BIER头信息中获取该报文携带的确定性业务配置信息,并根据该确定性业务配置信息进行报文处理,从而为基于BIER技术的组播提供确定性时延及可靠性服务,实现对BIER组播提供进行确定性业务。
在一个实施例中,该报文处理方法还包括:S11,第一设备在BIER头信息中携带扩展标识位,扩展标识位被置位时,用于指示BIER头信息中存在确定性业务配置信息。
在该实施例中,BIER头中的扩展标识位用于对扩展的确定性业务配置信息对应的字段进行标识,从而在兼容现有BIER头的前提下实现对BIER头的灵活设置。
在一个实施例中,第一设备在确定性业务配置信息中携带流标识,并且其中,通过流标识唯一识别一条BIER组播流。
具体地,流标识是根据报文类型定义相应的标识信息,报文类型包括:互联网协议IPv6报文、多协议标签交换协议MPLS报文和以太网报文。
在一个实施例中,基于BIER的组播报文为多协议标签交换协议MPLS报文时,流标识为MPLS标签或MPLS标签的映射值;基于BIER的组播报文为互联网协议IPv6报文或以太网报文时,流标识为BIER组播流分配的唯一流标识。
在本公开实施例中,通过流标识可以唯一标识一条BIER组播流。不同组播报文类型对确定性业务的需求不同,在根据确定性业务配置信息处理报文时,需要先对报文中的组播流进行识别。
需要说明的是,按照传输协议不同,BIER数据面可以包括多种不同类型。例如MPLS报文、IPv6报文和其他非MPLS报文等。本公开实施 例不再赘述。
在一个实施例中,确定性业务需求包括报文复制和消除时,在发送携带BIER头信息的组播报文之前,还包括:S12,第一设备复制携带BIER头信息的组播报文,并在确定性业务配置信息中携带报文序列号。
在该实施例中,若需要实现报文的复制消除功能,则可以在确定性业务配置信息中设置组播报文的序列号。
在一个实施例中,该报文转发方法还包括:S13,第一设备在确定性业务配置信息中携带序列号标识位,序列号标识位被置位时,用于指示确定性业务配置信息中存在报文序列号。
在本公开实施例的描述中,被置位表示被设置值为1。本公开实施例可以通过序列号标识位对确定性业务配置信息中的报文序列号进行标识。
示例性地,若序列号标识位置1,可以表示确定性业务配置信息中包含报文序列号,则需要对组播进行复制和消除处理;若序列号标识位置0,可以表示确定性业务配置信息中不包含报文序列号,则无需对组播进行复制和消除处理,从而实现对BIER头的灵活设置。
在一个实施例中,基于BIER的组播报文为互联网协议IPv6报文时,BIER头信息携带于IPv6报文的下一个头部字段Next Header中;基于BIER的组播报文为多协议标签交换协议MPLS报文时,BIER头信息中携带MPLS标签;基于BIER的组播报文为以太网报文时,BIER头信息中携带位索引显示复制报文转发表BIFT标识。
具体地,基于BIER的组播报文为MPLS报文或以太网报文时,第一设备按照请求注解RFC8296格式生成BIER头信息。
在该实施例中,可以按照本公开实施例中扩展的BIER头对不同传输协议的报文进行封装,即在不同传输协议的报文的BIER头信息中携带与确定性业务需求对应的确定性业务配置信息。
在一个实施例中,在获取确定性业务配置信息之前,该报文转发方法还包括:S31,第二设备读取BIER头信息中携带的扩展标识位,判断扩 展标识位是否被置位;S32,若扩展标识位被置位,第二设备判定接收的组播报文中携带有确定性业务配置信息。
在该实施例中,通过判断BIER头信息中设置的扩展标识位的取值,可以确定组播报文中是否携带有确定性业务配置信息,此时,第二设备可以根据确定性业务配置信息进行报文处理。
示例性地,该扩展标识位为1时,判定BIER头信息中存在确定性业务配置信息;若该扩展标识位为0时,判定BIER头信息中不存在确定性业务配置信息,从而实现报文信息的灵活读取,提高报文处理的灵活性和处理效率。
在一个实施例中,第二设备为中间节点设备,该报文转发方法还包括:S41,若扩展标识位未被置位,中间节点设备对接收的组播报文进行基于BIER的报文转发。
在该实施例中,中间节点设备若判定接收报文的BIER头信息中的扩展标识位未被置位,则可以按照BIER一般报文进行报文转发。
在一个实施例中,第二设备为中间节点设备,步骤S21中根据确定性业务配置信息进行报文处理的步骤,可以包括:S51,第二设备根据确定性业务配置信息中携带的流标识,从接收的携带BIER头信息的组播报文中识别组播流,并对识别出的组播流配置预留资源。
在该实施例中,中间节点设备对识别出的组播流配置宽带、缓存等预留资源,达到对应的组播报文对预留资源的需求,从而实现对确定性业务对转发路径节点的拥塞控制。
在一个实施例中,根据确定性业务配置信息进行报文处理的步骤,可以包括:第二设备获取确定性业务配置信息中携带的报文序列号,并基于序列号对接收的组播报文进行复制和消除处理。
在一个实施例中,确定性业务配置信息中还携带序列号标识位,在获取确定性业务配置信息中携带的报文序列号之前,该报文转发方法还包括:S61,判断序列号标识位是否被置位;S62,若序列号标识位被置位,判定 确定性业务配置信息中存在报文序列号。
在该实施例中,中间节点设备或尾节点设备读取接收报文中扩展的确定性业务配置信息,并判断确定性业务配置信息中携带的序列号标志位是否被置位。示例性地,若携带的序列号标识位被置1,则判定确定性业务配置信息中携带有序列号,对组播报文进行复制和消除处理;若携带的序列号标识位被置0,判定为不存在报文序列号,无需对组播报文进行复制和消除处理。
在一个实施例中,第二设备为中间节点设备,则在步骤S21的根据确定性业务配置信息进行报文处理之后,该报文转发方法还包括:S71,中间节点设备对根据确定性业务配置信息进行报文处理后的组播报文,进行基于BIER的报文转发。
在该实施例中,中间节点设备根据BIER头信息中携带的确定性业务配置信息处理并转发报文,从而实现对组播报文进行确定性业务提供。
在一个实施例中,第二设备为尾节点设备,则在根据确定性业务配置信息进行报文处理之后,该报文转发方法还包括:S81,尾节点设备获取并转发经处理后的组播报文所承载的组播业务。
在该实施例中,尾节点设备根据确定性业务配置进行确定性业务处理,并在解封装报文后转发组播业务,实现BIER组播技术中确定性业务功能。
在实际应用场景中,本公开实施例中的首节点设备、中间节点设备和尾节点设备可以分别执行基于BIER组播确定性业务的报文转发。为了更好地理解本公开,下面通过图8至图13,进一步描述应用于上述每个节点设备的报文转发方法。
图8示出本公开另一实施例的报文转发方法示意图。如图8所示,该报文转发方法可以应用于第一设备,并包括如下步骤。
S110,根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息。
S120,发送携带BIER头信息的组播报文。
在该实施例中,第一设备可以是首节点设备BFIR。首节点设备可以根据BIER组播确定性业务需求,按照本公开扩展的BIER头对组播报文进行封装,在组播报文的BIER头信息中携带确定性业务扩展字段,以使BIER组播业务转发实现确定性业务提供。
在一个实施例中,在步骤S120之前,该报文转发方法还可以包括:S111,在BIER头信息中携带扩展标识位,且扩展标识位被置位时,用于指示BIER头信息中存在确定性业务配置信息。
在该实施例中,首节点设备根据确定性业务需求,可以在BIER头中设置扩展标识位,对BIER头中的扩展的确定性业务配置信息对应的字段进行标识,从而在兼容现有BIER头的前提下实现对BIER头的灵活设置。
在一个实施例中,在步骤S120之前,该报文转发方法还可以包括:S112,在确定性业务配置信息中携带流标识,并且其中,通过流标识能够唯一识别一条BIER组播流。
具体地,流标识是与组播报文类型相对应的标识信息,报文类型包括:互联网协议IPv6报文、多协议标签交换协议MPLS报文和以太网报文。
在该实施例中,组播报文类型不同,该报文对应的流标识不同。组播报文的流标识可以根据不同的报文类型进行设置。
作为一个示例,基于BIER的组播报文为MPLS报文时,流标识为MPLS标签或MPLS标签的映射值;基于BIER的组播报文为互联网协议IPv6报文或以太网报文时,流标识为BIER组播流分配的唯一流标识。
在一个实施例中,若确定性业务需求包括报文复制和消除处理,则在步骤S120之前,该报文转发方法还可以包括:S113,复制携带该BIER头信息的组播报文,并在确定性业务配置信息中携带报文序列号。
在该实施例中,若需要实现报文的复制消除功能,首节点设备可以在确定性业务配置信息中设置组播报文的报文序列号。
在一个实施例中,该报文转发方法还可以包括:S114,在确定性业务配置信息中携带序列号标识位,序列号标识位被置位时,用于指示确定性 业务配置信息中存在报文序列号。
在该实施例中,通过序列号标识位对确定性业务配置信息中的序列号进行标识。示例性地,若序列号标识位置1,可以表示确定性业务配置信息中包含序列号,则需要对组播进行复制和消除处理;若序列号标识位置0,可以表示确定性业务配置信息中不包含序列号,则无需对组播进行复制和消除处理,从而实现对BIER头的灵活设置。
在一个实施例中,基于BIER的组播报文为互联网协议IPv6报文时,BIER头信息携带于IPv6报文的下一个头部字段Next Header中。在该实施例中,可以按照本公开实施例中扩展的BIER头对IPv6报文进行封装。
在一个实施例中,基于BIER的组播报文为多协议标签交换协议MPLS报文时,BIER头信息中携带MPLS标签。在该实施例中,可以按照本公开实施例中扩展的BIER头对MPLS报文进行封装。
在一个实施例中,基于BIER的组播报文为以太网报文时,BIER头信息中携带位索引显示复制报文转发表BIFT标识。在该实施例中,可以按照本公开实施例中扩展的BIER头对以太网络报文进行封装。
在本公开实施例中,基于BIER的组播报文,可以包括MPLS报文或MPLS报文以外的基于其他传输协议的报文。当基于BIER的组播报文为MPLS报文或以太网报文时,可以按照请求注解RFC8296格式生成BIER头信息。
根据本公开实施例的报文转发方法,首节点设备根据BIER组播确定性业务需求,按照本公开实施例中图4所示的扩展BIER头对报文进行封装,通过在扩展BIER头中携带确定性业务扩展字段,实现在BIER头中携带确定性业务配置信息,发送携带有确定性业务配置信息的BIER确定性组播报文,以使BIER组播业务转发实现确定性业务提供。
图9示出本公开再一实施例的报文转发方法流程示意图。如图9所示,该报文转发方法可以应用于第二设备。该报文转发方法可以包括如下步骤。
S210,从接收的基于位索引显示复制BIER的组播报文中,获取该组 播报文的BIER头信息携带的确定性业务配置信息。
S220,根据确定性业务配置信息进行报文处理。
在该实施例中,第二设备可以是中间节点设备或尾节点设备。根据本公开实施例的报文转发方法,第二设备接收到报文后,可以根据报文携带的确定性业务配置信息处理组播报文,从而实现为BIER组播业务转发提供确定性业务的服务。
在一个实施例中,接收到的组播报文的BIER头信息中设置有扩展标识位。在该实施例中,在步骤S210的获取组播报文携带的确定性业务配置信息之前,该报文转发方法还包括:S201,读取BIER头信息中携带的扩展标识位,判断扩展标识位是否被置位;S202,若扩展标识位被置位,判定接收到的组播报文携带有确定性业务配置信息。
在一个实施例中,在第二设备为中间节点设备的情况下,若扩展标识位未被置位,则中间节点设备对接收到的组播报文进行基于BIER的报文转发。
在该实施例中,通过判断BIER头信息中设置的扩展标识位的取值,判定组播报文携带的确定性业务配置信息,例如该扩展标识位为1时,判定BIER头信息中存在确定性业务配置信息;若该扩展标识位为0时,判定BIER头信息中不存在确定性业务配置信息。从而实现报文信息的灵活读取,提高报文处理的灵活性和处理效率。
在一个实施例中,步骤S220可以包括:S221,根据确定性业务配置信息中携带的流标识,从接收的携带BIER头信息的组播报文中识别组播流,并对识别出的组播流配置预留资源。
在该实施例中,不同协议的组播报文对预留资源的需求不同,因此需要根据流标识对BIER组播流进行流识别,对识别出的组播流配置宽带、缓存等预留资源,达到对应的组播报文对预留资源的需求,从而实现对确定性业务对转发路径节点的拥塞控制。
在一个实施例中,步骤S220可以包括:S222,获取确定性业务配置 信息中携带的报文序列号,并基于报文序列号对接收的组播报文进行复制和消除处理。
在一个实施例中,确定性业务配置信息中还携带序列号标识位。在该实施例中,在获取确定性业务配置信息中携带的报文序列号之前,还包括:判断序列号标识位是否被置位;若序列号标识位被置位,判定确定性业务配置信息中存在报文序列号。
示例性地,序列号标识位置1时,可以判定确定性业务配置信息中存在报文序列号;序列号标识位置0时,判定确定性业务配置信息中不存在报文序列号。
在一个实施例中,第二设备为中间节点设备,则在步骤S220之后,该报文转发方法还包括:S230,中间节点设备对根据确定性业务配置信息进行报文处理后的组播报文,进行基于BIER的报文转发。
在一个实施例中,第二设备为尾节点设备,步骤S220之后,该报文转发方法还包括:S240,尾节点设备获取并转发经处理后的组播报文所承载的组播业务。
根据本公开实施例的报文转发方法,中间节点设备在接收到基于BIER的组播报文后,根据BIER头信息中携带的确定性业务配置信息处理并转发报文;而尾节点设备在接收到基于BIER的组播报文后,根据BIER头信息中携带的确定性业务配置信息处理,并在解封装报文后转发组播业务,从而实现BIER组播报文的确定性业务提供。
下面结合图10-图12,描述本公开示例性实施例的首节点设备、中间节点设备和尾节点设备的报文处理流程。
图10示出本公开实施例的首节点设备的报文处理流程示意图。如图10所示,首节点设备的报文处理流程可以包括:S410,首节点设备获取基于BIER的组播报文的确定性业务需求;S420,利用扩展的BIER头对组播报文进行封装,在BIER头中携带确定性业务扩展字段。
在该实施例中,确定性业务扩展字段用于携带确定性业务配置信息。 图10中首节点设备的报文处理流程可以参考前述实施例中描述的报文转发方法实施例中的对应过程,在此不再赘述。
图11示出本公开实施例的中间节点设备的报文处理流程示意图。如图11所示,中间节点设备的报文处理流程可以包括如下步骤。
S510,中间节点设备接收BIER组播报文。
S520,判断BIER头信息携带的扩展标识位D是否置1,若扩展标识位D未置1,判定BIER头信息未携带确定性业务配置信息,则执行S530;若扩展标识位D置1,判定BIER头信息携带确定性业务配置信息,执行S540。
S530,按照BIER一般报文进行报文转发。
S540,从确定性业务配置信息中获取组播报文流标识,对组播报文进行流识别。
S550,判断确定性业务配置信息中是否携带序列号字段,若携带序列号字段,执行步骤S560;若未携带序列号字段,执行步骤S570。
S560,获取组播报文的报文序列号,以对组播报文进行报文复制和消除。
S570,基于BIER转发经确定性业务信息处理后的组播报文。
根据本公开实施例的报文处理方法,中间节点设备在接收到基于BIER的组播报文之后,根据BIER头信息中携带的确定性业务配置信息处理并转发报文,从而对组播报文进行确定性业务提供。
应理解,结合图11描述的中间节点设备的报文处理流程,可以参考前述实施例描述的应用于第二设备中的中间节点设备的报文转发方法实施例中的对应过程,在此不再赘述。
图12示出本公开实施例的尾节点设备的报文处理流程示意图。如图12所示,尾节点设备的报文处理流程可以包括:S610,尾节点设备接收BIER组播报文;S620,获取报文中的确定性业务配置信息,根据该确定 性业务配置信息进行报文处理;S630,解封装组播报文,转发组播业务。
根据本公开实施例的报文处理方法,尾节点设备在接收到该组播报文后,可以根据确定性业务配置进行复制消除等处理,解封装报文后转发该报文承载的组播业务,从而使该组播业务满足确定性业务需求。
应理解,结合图12描述的尾节点设备的报文处理流程,可以参考前述实施例描述的应用于第二设备中的尾节点设备的报文转发方法实施例中的对应过程,在此不再赘述。
为了更好的理解本公开,下面结合图13至图15,通过具体实施例,描述不同传输协议下BIER确定性业务的实现方法。图13示出IPv6数据面BIER确定性业务的实现方法流程图。如图13所示,IPv6数据面BIER确定性业务的实现方法可以包括如下步骤。
S710,首节点设备根据BIER组播确定性业务需求,按照本公开实施例中扩展的BIER头对IPv6组播报文进行封装,并发送封装后的组播报文。
具体地,BIER头可以携带于IPv6报头的下一个头部字段(Next Header)中,其中,确定性业务扩展字段DetNet Sub-TLV可以携带于BIER头中,字段DetNet Sub-TLV用于携带确定性业务信息。
其中,字段DetNet Sub-TLV中可以包括BIER确定性流标识字段Flow ID;如果还需要配置报文的复制消除功能,则需要复制报文,字段DetNet Sub-TLV中还需要携带报文序列号(Sequence Number)字段。
S720,中间节点设备接收到该组播报文后,根据IPv6报头的Next Header字段获取BIER头信息,根据BIER头信息中携带的确定性业务信息,对报文进行确定性处理并转发。
具体地,判断BIER头的扩展标识位D是否置1,如果置1,则表示BIER头携带确定性业务扩展字段DetNet Sub-TLV,对该组播报文进行流识别,并按照确定性组播配置预留资源并转发报文。
S730,尾节点设备接收该IPv6组播报文,获取报文中的确定性业务配置信息,根据该确定性业务配置信息处理报文,解封装并转发组播业务。
具体地,尾节点设备接收该组播报文后,根据确定性业务配置信息进行流识别,以及判断DetNet字段是否携带序列号字段,如果携带,则获取报文的序列号,根据DetNet配置进行复制消除等处理,解封装报文后转发组播业务。
为了描述的方便和简洁,这里省略了对已知方法的详细描述,并且上述描述的首节点设备、中间节点设备和尾节点设备对报文处理的具体流程,可以参考前述实施例中描述的报文转发方法实施例中的对应过程,在此不再赘述。
图14示出MPLS数据面BIER确定性业务的实现方法流程图。如图14所示,MPLS数据面BIER确定性业务的实现方法可以包括如下步骤。
S810,首节点设备根据BIER组播确定性业务需求,按照本公开实施例中扩展的BIER头对MPLS组播报文进行封装,并发送封装后的组播报文。
具体地,可以按照RFC8296进行数据封装,在BIER头中携带BIER-MPLS标签,从而兼容MPLS数据面报文格式。
其中,确定性业务扩展字段DetNet Sub-TLV携带于BIER头中,其中确定性业务扩展字段可以包括BIER确定性流标识Flow ID。示例性地,该流标识可以是MPLS标签值,或者由标签值映射得到的与MPLS标签值对应的标识信息,以用于唯一识别一个BIER确定性组播流。
在BIER域内,通过配置Flow ID识别经过各节点设备的BIER流的确定性处理,包括资源预留等,如果配置了复制消除功能,则需要复制报文,携带序列号Sequence Number字段到DetNet Sub-TLV中。
S820,中间节点设备接收到该组播报文后,根据BIER-MPLS获取BIER头信息,根据BIER头信息中携带的确定性业务信息,对报文进行确定性处理并转发。
具体地,判断BIER头的扩展标识位D是否置1,如果置1,则表示BIER头携带确定性业务扩展字段DetNet Sub-TLV,根据DetNet Sub-TLV 字段中的Flow ID对该组播报文进行流识别,并按照确定性组播配置预留资源并转发报文。
S830,尾节点设备接收该组播报文,获取报文中的确定性业务配置信息,根据该确定性业务配置信息处理报文,解封装并转发组播业务。
具体地,尾节点设备接收报文后,根据确定性业务配置信息进行流识别,以及判断DetNet字段是否携带序列号字段,如果携带,则获取报文的序列号,根据DetNet配置进行复制消除等处理,解封装报文后转发组播业务。
为了描述的方便和简洁,这里省略了对已知方法的详细描述,并且上述描述的首节点设备、中间节点设备和尾节点设备对报文处理的具体流程,可以参考前述实施例中描述的报文转发方法实施例中的对应过程,在此不再赘述。
图15示出以太网数据面的BIER确定性业务的实现方法流程图。如图15所示,适用于以太网数据面的BIER确定性业务的实现方法可以包括如下步骤。
S910,首节点设备根据BIER组播确定性业务需求,按照本公开实施例中扩展的BIER头对以太网报文进行封装,并发送封装后的组播报文。
具体地,可以按照RFC8296进行数据封装,在BIER头中携带BIFT-id,用于查找BIER转发表。
其中,确定性业务扩展字段DetNet Sub-TLV携带于BIER头中,其中确定性业务扩展字段可以包括BIER确定性流标识Flow ID,以用于唯一识别一个BIER确定性组播流。
在BIER域内,通过配置Flow ID识别经过各节点设备的BIER流的确定性处理,包括资源预留等,如果配置了复制消除功能,则需要复制报文,携带报文序列号(Sequence Number)字段到DetNet Sub-TLV中。
S920,中间节点设备接收到该组播报文后,获取BIER头信息,根据BIER头信息中携带的确定性业务信息,对报文进行确定性处理并转发。
具体地,可以根据BIFT-id查找BIER信息,并判断BIER头的扩展标识位D是否置1,如果置1,则表示BIER头携带确定性业务扩展字段DetNet Sub-TLV,根据DetNet Sub-TLV字段中的Flow ID对该组播报文进行流识别,并按照确定性组播配置预留资源并转发报文。
S930,尾节点设备接收该组播报文,获取报文中的确定性业务配置信息,根据该确定性业务配置信息处理报文,解封装并转发组播业务。
具体地,尾节点设备接收报文后,根据确定性业务配置信息进行流识别,以及判断DetNet字段是否携带序列号字段,如果携带,则获取报文的序列号,根据DetNet配置进行复制消除等处理,解封装报文后转发组播业务。
为了描述的方便和简洁,这里省略了对已知方法的详细描述,并且上述描述的首节点设备、中间节点设备和尾节点设备对报文处理的具体流程,可以参考前述实施例中描述的报文转发方法实施例中的对应过程,在此不再赘述。
通过上述实施例的描述可知,本公开实施例的报文转发方法,提供一种通用的基于BIER组播确定性业务的转发方法,针对不同传输协议的组播报文,可以对组播报文的BIER报头进行扩展,在BIER报头中加入DetNet确定性技术相关功能,使BIER组播业务转发实现确定性业务提供,从而达到5G业务对网络的差异化要求,实现低时延、低丢包率的可靠性传输服务。
下面结合附图,详细介绍根据本公开实施例的报文转发节点设备。图16示出本公开一个实施例的报文转发节点设备。如图16所示,该报文转发节点设备包括第一设备和第二设备。
第一设备1010,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带BIER头信息的组播报文。
第二设备1020,设置为从接收的携带基于位索引显示复制BIER头信 息的组播报文中,获取所述BIER头信息中携带的确定性业务配置信息,并根据确定性业务配置信息进行报文处理。
在一个实施例中,第一设备为BIER网络的首节点设备,第二设备为BIER网络的中间节点设备或尾节点设备。
在一个实施例中,第一设备1010,还设置为在BIER头信息中携带扩展标识位,扩展标识位被置位时,用于指示BIER头信息中存在确定性业务配置信息。
在一个实施例中,第一设备1010,还设置为在确定性业务配置信息中携带流标识,并且其中,通过流标识能够唯一识别一条BIER组播流。
在一个实施例中,流标识是根据报文类型定义相应的标识信息,报文类型包括:互联网协议IPv6报文、多协议标签交换协议MPLS报文和以太网报文。
在一个实施例中,基于BIER的组播报文为多协议标签交换协议MPLS报文时,流标识为MPLS标签或MPLS标签的映射值;基于BIER的组播报文为互联网协议IPv6报文或以太网报文时,流标识为BIER组播流分配的唯一流标识。
在一个实施例中,确定性业务需求包括报文复制和消除时,在发送携带BIER头信息的组播报文之前,第一设备1010还设置为复制携带BIER头信息的组播报文,并在确定性业务配置信息中携带报文序列号。
在一个实施例中,第一设备1010还设置为:在确定性业务配置信息中携带序列号标识位,序列号标识位被置位时,用于指示确定性业务配置信息中存在报文序列号。
在一个实施例中,基于BIER的组播报文为互联网协议IPv6报文时,BIER头信息携带于IPv6报文的下一个头部字段Next Header中;基于BIER的组播报文为多协议标签交换协议MPLS报文时,BIER头信息中携带MPLS标签;基于BIER的组播报文为以太网报文时,BIER头信息中携带位索引显示复制报文转发表BIFT标识。
在一个实施例中,第二设备1020还设置为:在获取确定性业务配置信息之前,读取BIER头信息中携带的扩展标识位,判断扩展标识位是否被置位;若扩展标识位被置位,判定接收的组播报文中携带有确定性业务配置信息。
在一个实施例中,第二设备1020为中间节点设备,则中间节点设备还设置为:若扩展标识位未被置位,中间节点设备对接收的组播报文进行基于BIER的报文转发。
在一个实施例中,第二设备1020在设置为根据确定性业务配置信息进行报文处理时,具体设置为:根据确定性业务配置信息中携带的流标识,从接收的携带BIER头信息的组播报文中识别组播流,并对识别出的组播流配置预留资源。
在一个实施例中,第二设备1020在设置为根据确定性业务配置信息进行报文处理,具体设置为:获取确定性业务配置信息中携带的报文序列号,并基于序列号对接收的组播报文进行复制和消除处理。
在一个实施例中,确定性业务配置信息中还携带序列号标识位,则第二设备2020还设置为:在获取确定性业务配置信息中携带的报文序列号之前,判断序列号标识位是否被置位;若序列号标识位被置位,判定确定性业务配置信息中存在报文序列号。
在一个实施例中,第二设备1020为中间节点设备,则中间节点设备还设置为:在根据确定性业务配置信息进行报文处理之后,对根据确定性业务配置信息进行报文处理后的组播报文,进行基于BIER的报文转发。
在一个实施例中,第二设备1020为尾节点设备,则尾节点设备还设置为:在根据确定性业务配置信息进行报文处理之后,获取并转发经处理后的组播报文所承载的组播业务。
根据本公开实施例的报文转发节点设备,通过第一设备根据BIER组播确定性业务需求,按照本公开实施例中扩展的BIER头对组播报文进行封装,第二设备接收报文后,根据该确定性业务配置信息进行报文处理, 从而可以为基于BIER技术的组播提供确定性时延及可靠性服务,实现对BIER组播提供进行确定性业务,以达到5G网络中低时延,低丢包率的要求。
图17示出本公开实施例的第一设备的结构示意图。如图17所示,第一设备1100包括如下模块。
报文封装模块1100,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在组播报文的BIER头信息中携带对应的确定性业务配置信息;报文发送模块1130,设置为发送携带BIER头信息的组播报文。
在一个实施例中,第一设备还具体还设置为:在发送携带BIER头信息的组播报文之前,在BIER头信息中携带扩展标识位,扩展标识位被置位时,用于指示BIER头信息中存在确定性业务配置信息。
在一个实施例中,第一设备还具体还设置为:在发送携带BIER头信息的组播报文之前,在确定性业务配置信息中携带流标识,并且其中,通过流标识能够唯一识别一条BIER组播流。
具体地,流标识是根据报文类型定义相应的标识信息,报文类型包括:互联网协议IPv6报文、多协议标签交换协议MPLS报文和以太网报文。
作为示例,基于BIER的组播报文为多协议标签交换协议MPLS报文时,流标识为MPLS标签或MPLS标签的映射值;述基于BIER的组播报文为互联网协议IPv6报文或以太网报文时,流标识为BIER组播流分配的唯一流标识。
在一个实施例中,确定性业务需求包括报文复制和消除时,第一设备具体还可以包括:序列号携带模块,设置为复制携带BIER头信息的组播报文,并在确定性业务配置信息中携带报文序列号。
在一个实施例中,第一设备具体还可以包括:序列号标识位携带模块,设置为在确定性业务配置信息中携带序列号标识位,序列号标识位被置位时,用于指示确定性业务配置信息中存在报文序列号。
根据本公开实施例的第一设备例如首节点设备,根据BIER组播确定性业务需求,按照本公开实施例中的扩展BIER头对报文进行封装,通过在扩展BIER头中携带确定性业务扩展字段,实现在BIER头中携带确定性业务配置信息,以使BIER组播业务转发实现确定性业务提供。
图18示出本公开实施例的第二设备的结构示意图。如图18所示,第二设备包括如下模块。
配置获取模块1210,设置为从接收的携带BIER头信息的组播报文中,获取BIER头信息中携带的确定性业务配置信息;报文处理模块1220,设置为根据确定性业务配置信息进行报文处理。
在一个实施例中,组播报文的BIER头信息中设置有扩展标识位,第二设备还可以包括:扩展标识判断模块,设置为在获取组播报文携带的确定性业务配置信息之前,读取BIER头信息中携带的扩展标识位,判断扩展标识位是否被置位;信息确定模块,设置为若扩展标识位被置位,判定接收的组播报文中携带有确定性业务配置信息。
在一个实施例中,第二设备为中间节点设备,该中间节点设备还可以包括:报文转发模块,设置为若扩展标识位未被置位,则中间节点设备对接收的组播报文进行基于BIER的报文转发。
在一个实施例中,报文处理模块1220具体可以包括:资源预留单元,设置为根据确定性业务配置信息中携带的流标识,从接收的携带BIER头信息的组播报文中识别组播流,并对识别出的组播流配置预留资源。
在一个实施例中,报文处理模块1200,具体可以包括:复制消除单元,设置为获取确定性业务配置信息中携带的报文序列号,并基于报文序列号对接收的组播报文进行复制和消除处理。
在一个实施例中,确定性业务配置信息中携带序列号标识位,第二设备还可以包括:序列号标识判定模块,设置为在获取确定性业务配置信息中携带的报文序列号之前,判断序列号标识位是否被置位,若序列号标识位被置位,判定确定性业务配置信息中存在报文序列号。
在一个实施例中,第二设备为中间节点设备,则中间节点设备的报文转发模块,还设置为对根据确定性业务配置信息进行报文处理后的组播报文,进行基于BIER的报文转发。
在一个实施例中,第二设备为尾节点设备,则尾节点设备还可以包括:业务转发模块,设置为获取并转发经处理后的组播报文所承载的组播业务。
根据本公开实施例的第二设备,第二设备为中间节点设备时,接收到基于BIER的组播报文后,可以根据BIER头信息中携带的确定性业务配置信息处理并转发报文,从而实现对组播报文进行确定性业务提供;第二设备为尾节点设备时,接收到基于BIER的组播报文后,可以对BIER组播流进行流识别,根据确定性业务配置进行复制消除等处理,解封装报文后转发组播业务,实现BIER组播技术中确定性业务功能。
通过上述实施例的描述可知,根据本公开实施例的上述报文转发节点设备,为了满足确定性服务等的业务需求,首节点设备可以根据确定性业务需求,通过扩展的BIER头信息,在BIER组播报文中携带确定性业务需求对应的确定性业务信息;中间节点设备收到该确定性组播流后,对该报文进行流识别,从而按照确定性组播配置预留资源并转发报文;尾节点收到该确定性组播流后,获取其中扩展的确定性业务配置信息,根据该配置处理报文,并解封装该报文后转发组播业务,使BIER组播业务的转发能够实现确定性的业务功能,从而为组播提供确定性时延及可靠性服务,达到5G网络中低时延,低丢包率的要求。
需要明确的是,本公开并不局限于上文实施例中所描述并在图中示出的特定配置和处理。为了描述的方便和简洁,这里省略了对已知方法的详细描述,并且上述描述的系统、模块和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
图19是示出能够实现根据本公开实施例的报文转发方法和设备的计算设备的示例性硬件架构的结构图。
如图19所示,计算设备1400包括输入设备1401、输入接口1402、中央处理器1403、存储器1404、输出接口1405、以及输出设备1406。其中,输入接口1402、中央处理器1403、存储器1404、以及输出接口1405通过总线1410相互连接,输入设备1401和输出设备1406分别通过输入接口1402和输出接口1405与总线1410连接,进而与计算设备1400的其他组件连接。
具体地,输入设备1401接收来自外部的输入信息,并通过输入接口1402将输入信息传送到中央处理器1403;中央处理器1403基于存储器1404中存储的计算机可执行指令对输入信息进行处理以生成输出信息,将输出信息临时或者永久地存储在存储器1404中,然后通过输出接口1405将输出信息传送到输出设备1406;输出设备1406将输出信息输出到计算设备1400的外部供用户使用。
在一个实施例中,图19所示的计算设备1400可以被实现为一种报文转发系统,该报文转发系统可以包括:存储器,被配置为存储程序;处理器,被配置为运行存储器中存储的程序,以执行上述实施例描述的应用于本公开上述实施例的任一实施例描述的报文转发方法。
根据本公开的实施例,上文参考流程图描述的过程可以被实现为计算机软件程序。例如,本公开的实施例包括一种计算机程序产品,其包括有形地包含在机器可读介质上的计算机程序,计算机程序包含用于执行流程图所示的方法的程序代码。在这样的实施例中,该计算机程序可以从网络上被下载和安装,和/或从可拆卸存储介质被安装。
本领域普通技术人员可以理解,上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中,在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分;例如,一个物理组件可以具有多个功能,或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器,如中央处理器、数字信号处理器或 微处理器执行的软件,或者被实施为硬件,或者被实施为集成电路,如专用集成电路。这样的软件可以分布在计算机可读介质上,计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的,术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外,本领域普通技术人员公知的是,通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据,并且可包括任何信息递送介质。
可以理解的是,以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式,然而本公开并不局限于此。对于本领域内的普通技术人员而言,在不脱离本公开的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本公开的保护范围。

Claims (22)

  1. 一种报文转发方法,应用于第一设备,包括:
    根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在所述组播报文的BIER头信息中携带对应的确定性业务配置信息;
    发送携带所述BIER头信息的组播报文。
  2. 根据权利要求1所述的方法,其中,在发送携带所述BIER头信息的组播报文之前,所述方法还包括:
    在所述BIER头信息中携带扩展标识位,所述扩展标识位被置位时,用于指示所述BIER头信息中存在所述确定性业务配置信息。
  3. 根据权利要求1所述的方法,其中,在发送携带所述BIER头信息的组播报文之前,所述方法还包括:
    在所述确定性业务配置信息中携带流标识,并且其中,通过所述流标识能够唯一识别一条BIER组播流。
  4. 根据权利要求3所述的方法,其中,
    所述流标识是根据报文类型定义相应的标识信息,所述报文类型包括:互联网协议IPv6报文、多协议标签交换协议MPLS报文和以太网报文。
  5. 根据权利要求4所述的方法,其中,
    所述基于BIER的组播报文为多协议标签交换协议MPLS报文时,所述流标识为MPLS标签或所述MPLS标签的映射值;
    所述基于BIER的组播报文为互联网协议IPv6报文或以太网报文时,所述流标识为BIER组播流分配的唯一流标识。
  6. 根据权利要求1所述的方法,其中,所述确定性业务需求包括报文 复制和消除时,在发送携带所述BIER头信息的组播报文之前,还包括:
    复制携带所述BIER头信息的组播报文,并在所述确定性业务配置信息中携带报文序列号。
  7. 根据权利要求6所述的方法,其中,所述方法还包括:
    在所述确定性业务配置信息中携带序列号标识位,所述序列号标识位被置位时,用于指示所述确定性业务配置信息中存在所述报文序列号。
  8. 一种报文转发方法,应用于第二设备,包括:
    从接收的携带基于位索引显示复制BIER头信息的组播报文中,获取所述BIER头信息中携带的确定性业务配置信息;
    根据所述确定性业务配置信息进行报文处理。
  9. 根据权利要求8所述的方法,其中,在所述获取所述确定性业务配置信息之前,还包括:
    读取所述BIER头信息中携带的扩展标识位,判断所述扩展标识位是否被置位;
    若所述扩展标识位被置位,判定接收的组播报文中携带有所述确定性业务配置信息。
  10. 根据权利要求9所述的方法,其中,所述第二设备为中间节点设备,所述方法还包括:
    若所述扩展标识位未被置位,所述中间节点设备对所述接收的组播报文进行基于BIER的报文转发。
  11. 根据权利要求8所述的方法,其中,所述根据确定性业务配置信息进行报文处理,包括:
    根据所述确定性业务配置信息中携带的流标识,从接收的携带所述BIER头信息的组播报文中识别组播流,并对识别出的组播流配置预留资源。
  12. 根据权利要求8所述的方法,其中,根据确定性业务配置信息进行报文处理,包括:
    获取所述确定性业务配置信息中携带的报文序列号,并基于所述报文序列号对所述接收的组播报文进行复制和消除处理。
  13. 根据权利要求12所述的方法,其中,所述确定性业务配置信息中还携带序列号标识位,在获取所述确定性业务配置信息中携带的报文序列号之前,所述方法还包括:
    判断所述序列号标识位是否被置位;
    若所述序列号标识位被置位,判定所述确定性业务配置信息中存在所述报文序列号。
  14. 根据权利要求8所述的方法,其中,所述第二设备为中间节点设备,在根据所述确定性业务配置信息进行报文处理之后,所述方法还包括:
    所述中间节点设备对根据所述确定性业务配置信息进行报文处理后的组播报文,进行基于BIER的报文转发。
  15. 根据权利要求8所述的方法,其中,所述第二设备为尾节点设备,在根据所述确定性业务配置信息进行报文处理之后,所述方法还包括:
    所述尾节点设备获取并转发经所述处理后的组播报文所承载的组播业务。
  16. 一种报文转发方法,包括:
    第一设备根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在所述组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带所述BIER头信息的组播报文;
    第二设备从接收的携带所述BIER头信息的组播报文中,获取所述确定性业务配置信息,并根据所述确定性业务配置信息进行报文处理。
  17. 根据权利要求16所述的方法,其中,
    所述第一设备为BIER网络的首节点设备,所述第二设备为BIER网络的中间节点设备或尾节点设备。
  18. 一种第一设备,包括:
    报文封装模块,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在所述组播报文的BIER头信息中携带对应的确定性业务配置信息;
    报文发送模块,设置为发送携带所述BIER头信息的组播报文。
  19. 一种第二设备,包括:
    配置获取模块,设置为从接收的携带BIER头信息的组播报文中,获取所述BIER头信息携带的确定性业务配置信息;
    报文处理模块,设置为根据所述确定性业务配置信息进行报文处理。
  20. 一种报文转发节点设备,包括:
    第一设备,设置为根据对基于位索引显示复制BIER的组播报文的确定性业务需求,在所述组播报文的BIER头信息中携带对应的确定性业务配置信息,发送携带所述BIER头信息的组播报文;
    第二设备,设置为从接收的携带所述BIER头信息的组播报文中,获 取所述确定性业务配置信息,并根据所述确定性业务配置信息进行报文处理。
  21. 一种报文转发系统,包括存储器和处理器;
    所述存储器设置为储存有可执行程序代码;
    所述处理器设置为读取所述存储器中存储的可执行程序代码以执行权利要求1至7中任一项、权利要求8至15中任一项、或权利要求16至17中任一项所述的报文转发方法。
  22. 一种计算机可读存储介质,所述计算机可读存储介质包括指令,当所述指令在计算机上运行时,使得计算机执行如权利要求1至7中任一项、权利要求8至15中任一项、或权利要求16至17中任一项所述的报文转发方法。
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