WO2016161836A1 - Procédé de transmission de données, dispositif de plan de commande et dispositif de plan de réacheminement - Google Patents

Procédé de transmission de données, dispositif de plan de commande et dispositif de plan de réacheminement Download PDF

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Publication number
WO2016161836A1
WO2016161836A1 PCT/CN2016/071314 CN2016071314W WO2016161836A1 WO 2016161836 A1 WO2016161836 A1 WO 2016161836A1 CN 2016071314 W CN2016071314 W CN 2016071314W WO 2016161836 A1 WO2016161836 A1 WO 2016161836A1
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Prior art keywords
paths
data packets
network access
terminal device
plane device
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PCT/CN2016/071314
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English (en)
Chinese (zh)
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胡汉强
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胡汉强
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Publication of WO2016161836A1 publication Critical patent/WO2016161836A1/fr

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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
    • H04L45/02—Topology update or discovery
    • 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
    • H04L45/72—Routing based on the source address
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering

Definitions

  • the present invention relates to the field of communication transmission technologies, and in particular, to a data transmission method, a control plane device, and a forwarding plane device.
  • the Internet is connected by tens of thousands of switches and routers, and the data transmitted between the terminal devices is routed by the switch and the router to implement interconnection and intercommunication between the terminal devices;
  • the switch and the router When the switch and the router perform routing, they will be routed according to the stored routing table. Since the switch and the router have both routing and data forwarding functions, which are limited by the processing capacity and space storage capacity of the switches and routers, the routing table only The routing information of some switches and routers in the domain is saved. Therefore, it is difficult for the switch and the router to select an optimal path to transmit data packets from the Internet. It is easy to cause the data packets to be transmitted through some switches and routers, causing congestion on the Internet. happening.
  • the technical problem to be solved by the present invention is to provide a data transmission method, a control plane device, and a forwarding plane device, which can implement load balancing of the network and improve network transmission efficiency.
  • a technical solution adopted by the present invention is to provide a data transmission method, including receiving a plurality of IP data packets uploaded from a forwarding plane device; when the destination addresses of the multiple IP data packets are the same, Selecting, in the routing table, the plurality of IP data packets are routed to multiple paths of the destination terminal device corresponding to the destination address; and sending the multiple paths to the forwarding plane device, so that the forwarding plane device
  • the plurality of IP data packets are offloaded to the plurality of paths, wherein one IP data packet corresponds to one path, and the IP data packet is accompanied by related information of its corresponding path.
  • the method further includes: acquiring access information of the destination terminal device when the destination terminal device is currently accessing the network by using multiple network access devices, where the access information includes an address and a location of the terminal device Addressing the addresses of the plurality of network access devices; establishing a routing relationship between the address of the destination terminal device and the addresses of the plurality of network access devices, and saving the information to the routing table; the multiple paths include the destination A network access device that is accessed by the terminal device, where at least two paths exist in the plurality of paths, and the network access devices that pass through are different.
  • the network access device includes a wired base station, a wireless base station, or a WIFI hotspot.
  • another technical solution adopted by the present invention is to provide a data transmission method, including transmitting a plurality of IP data packets to a control plane device, wherein the plurality of IP data packets have the same destination address; After the control plane device selects, in the routing table, the multiple IP data packets are routed to multiple paths of the destination terminal device corresponding to the destination address, multiple paths are returned, where the one IP data packet corresponds to one a path; the IP data packet is accompanied by related information of its corresponding path, and the plurality of data packets are offloaded to the plurality of paths.
  • the multiple paths include nodes of the network access device accessed by the destination terminal device, and the multiple paths are in the path. There are at least two paths through which the network access devices are different.
  • a technical solution adopted by the present invention is to provide a control plane device, including a receiving module, configured to receive a plurality of IP data packets uploaded from a forwarding plane device, and a selection module, configured to When the destination addresses of the IP data packets are the same, the multiple IP data packets are selected in the routing table and routed to multiple paths of the destination terminal device corresponding to the destination address; and the sending module is configured to send the forwarding plane device Transmitting the multiple paths, so that the forwarding plane device offloads the multiple IP data packets to the multiple paths, where one IP data packet corresponds to one path, and the IP data packet is accompanied by its corresponding Information about the path.
  • the control plane device further includes: an obtaining module, configured to acquire access information of the destination terminal device when the destination terminal device accesses the network through multiple network access devices, where the The incoming information includes an address of the terminal device and an address of the multiple network access devices; saving a module, configured to save an address of the destination terminal device and an address of the multiple network access devices to the routing table; and multiple paths selected by the selecting module are connected by the destination terminal device The incoming network access device, and the network access devices through which at least two of the plurality of paths pass are different.
  • the network access device includes a wired base station, a wireless base station, or a WIFI hotspot.
  • a technical solution adopted by the present invention is to provide a forwarding plane device, including: a sending module, configured to send multiple IP data packets to a control plane device, where the multiple IP data packet destination addresses
  • the receiving module is configured to receive, after the control plane device selects, in the routing table, the multiple IP data packets are routed to multiple paths of the destination terminal device corresponding to the destination address, and return multiple paths, where And the one IP data packet corresponds to one path;
  • the forwarding module is configured to attach related information of the corresponding path to the IP data packet, and offload the multiple data packets to the multiple paths.
  • the multiple paths include the network access device accessed by the destination terminal device, and at least the multiple paths are There are two paths through which the network access devices are different.
  • the beneficial effects of the present invention are: different from the prior art, in the embodiment of the present invention, when the forwarding plane device sends multiple data packets to the same destination address, the control plane device selects multiple paths for the forwarding plane device.
  • the forwarding plane device offloads multiple IP data packets to multiple paths for transmission, so that the entire network load is more balanced, avoiding the situation that some nodes of the network are busy and some nodes are idle; in addition, the terminal devices at the destination address are connected through multiple networks.
  • the inbound device accesses the network, the network access devices included in each path are different.
  • the terminal device transmits data between the network and the network through multiple channels, improving data transmission efficiency between the two, and implementing data multi-stream aggregation. And the network access device is load balanced.
  • FIG. 1 is a schematic structural diagram of an implementation manner of an SND network according to the present invention.
  • FIG. 2 is a flow chart of a first embodiment of a data transmission method of the present invention
  • FIG. 3 is a flow chart of a second embodiment of a data transmission method of the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a control surface device of the present invention.
  • FIG. 5 is a schematic structural diagram of an embodiment of a forwarding plane device according to the present invention.
  • an SDN (Software Defined Network) network 20 includes a control plane device 21 and a forwarding plane device 22.
  • the control plane device 21 stores a routing table, which is responsible for performing route calculation and optimal forwarding path calculation according to the routing table.
  • the forwarding plane device 22 is responsible for data forwarding based on the path calculated by the control plane device 21.
  • the SDN network may further include a network access device 23, the network access device 23 is connected to the forwarding plane device 22, the network access device 23 serves as an edge node of the SDN network, and the terminal device 24 accesses the SDN network through the network access device 23, of course,
  • the network access device 23 is considered to be a special forwarding plane device 22 that is responsible for the terminal device 24 being in communication with the SDN network.
  • the terminal device 24 can access the SDN network 20 through multiple network access devices 23 at the same time, and the terminal device 24 can perform data transmission through multiple network access devices 23, which is equivalent to the terminal device 24 passing through multiple channels. Transmitting data with the SDN network, improving data transmission efficiency between the two, and implementing data multi-stream aggregation.
  • the terminal device 24 routes to the terminal device 25 to have two paths, namely path 1 and path 2, respectively.
  • the network access device of the path 1 and the path 2 is different.
  • the network access device 23 may be a wired receiving device, a wireless base station, a WIFI hotspot, etc., wherein the wired receiving device may be FTTH (Fiber To The Home), DISLAM equipment, and more.
  • FIG. 2 is a flowchart of a first embodiment of a method for data transmission according to the present invention, where the method includes:
  • Step S301 Receive multiple IP data packets uploaded from the forwarding plane device.
  • the forwarding plane device When the IP data packet enters the SDN network for transmission, the forwarding plane device first sends the IP data packet to The control plane device is routed by the control plane device, and the forwarding plane device forwards according to the routing path selected by the control plane device.
  • Step S302 When the destination addresses of the plurality of IP data packets are the same, the routing table selects multiple IP data packets to be routed to multiple paths of the destination terminal device corresponding to the destination address;
  • the load information of each forwarding plane device in the control plane device management domain is reported to the control plane device.
  • the control plane device can monitor the load status of each forwarding plane device in real time. Therefore, when the control plane device selects a path, according to its domain
  • the load situation of each forwarding plane device is combined with a preset load balancing algorithm to select a path, so that load balancing of each forwarding plane device is performed, and network transmission efficiency is higher.
  • Step S303 Send multiple paths to the forwarding plane device, so that the forwarding plane device offloads multiple IP data packets to multiple paths, where one IP data packet corresponds to one path, and the IP data packet is accompanied by related information of its corresponding path. ;
  • the correspondence between the IP data packet and the path may be allocated by the control plane device, and the control plane device attaches the path information to the corresponding IP data packet, and then delivers the IP data packet to the forwarding plane device, or IP.
  • the correspondence between the data packet and the path is allocated by the forwarding plane device, and the forwarding plane device attaches the path information to the corresponding IP data packet, and then forwards the IP data packet to the next forwarding plane device, and the next forwarding plane device according to The path information attached to the IP packet is forwarded until the IP packet is sent to the corresponding destination address.
  • the control plane device uses the network access device as a node of the path when the path is selected.
  • the method further includes:
  • Step S304 Acquire access information of the destination terminal device when the destination terminal device accesses the network through multiple network access devices, where the access information includes an address of the terminal device and an address of multiple network access devices.
  • the network access device When the destination terminal device accesses the network through the network access device, the network access device reports the access information to the control plane device, so that the controller device knows that the network access device can be routed to the destination terminal device.
  • Step S305 Establish a path between the address of the destination terminal device and the addresses of the plurality of network access devices By relationship and save to the routing table;
  • the network access device functions as an edge node of the SDN network.
  • the routing table of the control plane device stores routing information that is routed to the network access device.
  • the controller device learns that the network access device can be routed to the destination terminal device, and the destination terminal device is in communication with the SDN network.
  • the control plane device Since the terminal device accesses the network through multiple network access devices, the control plane device uses the network access device as a node of the path when selecting the path. Therefore, the multiple paths selected by the control plane device include the destination terminal device.
  • the access network access device has at least two paths in the plurality of paths, and the network access devices accessed by the destination terminal device are different, and the load of the network access device of the destination terminal device is balanced.
  • the control plane device updates its routing table to ensure that the routing relationship between the terminal device and the network access device stored in the routing table is the latest and effective. .
  • the control plane device selects multiple paths for the forwarding plane device, and the forwarding plane device offloads multiple IP data packets to multiple paths.
  • the transmission makes the entire network load more balanced, avoiding the situation that some nodes of the network are busy and some nodes are idle; in addition, when the terminal device of the destination address accesses the network through multiple network access devices, the network access of each path is included.
  • the device is also different, and the terminal device transmits data between the network and the network through multiple channels, improves data transmission efficiency between the two, implements data multi-stream aggregation, and makes the network access device load balanced.
  • FIG. 2 is a flowchart of a second embodiment of a data transmission method according to the present invention, where the method includes:
  • Step S401 Send a plurality of IP data packets to the control plane device, where the destination addresses of the multiple IP data packets are the same;
  • the control plane device is responsible for routing, and the forwarding plane device is responsible for forwarding IP data packets.
  • the forwarding plane device detects that there is no path information or forwarding information in the IP data packet, the IP data packet is sent to the control plane device for routing by the control plane device.
  • Step S402 After the control plane device selects multiple IP data packets in the routing table and routes to multiple paths of the destination terminal device corresponding to the destination address, multiple paths are returned, where the one IP data packet corresponds to one path. ;
  • Step S403 The IP data packet is accompanied by related information of its corresponding path, and the multiple data packets are offloaded to multiple paths;
  • the other forwarding plane devices in the network can forward the information according to the path information until the IP data packet arrives at the destination address, wherein the path related information includes the forwarding plane that passes in order.
  • the node ID and port of the device is included in the IP data packet.
  • control plane device selects multiple paths to the destination address, and offloads multiple IP data packets to multiple paths, so that the SDN network is load balanced and improves network transmission efficiency.
  • the multiple paths include the network access device accessed by the destination terminal device, and at least two paths exist in the multiple paths.
  • the network access devices that pass through are different, so that the load of the network access devices of the destination terminal is balanced.
  • the control plane device selects and forwards multiple paths of the multiple IP data packets, and the forwarding plane device offloads multiple IP data packets.
  • the transmission of the path is more balanced, so that the network load is more balanced, and some nodes are busy and some nodes are idle; in addition, when the terminal device of the destination address accesses the network through multiple network access devices, each path The network access devices are different, and the terminal device transmits data between the network and the network through multiple channels, improves data transmission efficiency between the two, implements data multi-stream aggregation, and makes the network access device load balanced.
  • the present invention further provides an implementation of a forwarding plane device.
  • the control plane device 50 includes a receiving module 501, a selecting module 502, and a transmitting module 503.
  • the receiving module 501 is configured to receive a plurality of IP data packets uploaded from the forwarding plane device 51.
  • the selecting module 502 is configured to select multiple IP data packets in the routing table when the destination addresses of the multiple IP data packets are the same. A plurality of paths from the destination terminal device corresponding to the destination address.
  • the sending module 503 is configured to send the multiple paths to the forwarding plane device, so that the forwarding plane device offloads multiple IP data packets to multiple paths, where one IP data packet corresponds to one path, and the IP data packet is accompanied by its corresponding Information about the path.
  • the forwarding device on the network can forward the IP data packet according to the related information of the path until the IP data packet is transmitted to the destination address.
  • control plane device selects multiple paths to the destination address, and offloads multiple IP data packets to multiple paths, so that the SDN network is load balanced and improves network transmission efficiency.
  • control plane device 50 further includes an obtaining module 503 and a saving module 504.
  • the obtaining module 503 is configured to acquire access information of the destination terminal device when the destination terminal device accesses the network through multiple network access devices, where the access information includes an address of the terminal device and an address of multiple network access devices.
  • the saving module 504 is configured to save the address of the destination terminal device and the address of the plurality of network access devices into the routing table.
  • the plurality of paths selected by the selection module 502 all include network access devices accessed by the destination terminal device, and at least two paths in the plurality of paths are different from each other.
  • the control plane device uses the network access device as a node of the path. Therefore, the multiple paths selected by the control plane device include the network accessed by the destination terminal device.
  • the access device has at least two paths in the plurality of paths, and the network access devices accessed by the destination terminal device are different, ensuring load balancing of the network access devices of the destination terminal device, and further ensuring load balancing of the network.
  • the control plane device selects multiple paths for the forwarding plane device, and the forwarding plane device offloads multiple IP data packets to multiple paths.
  • the transmission makes the entire network load more balanced, avoiding the situation that some nodes of the network are busy and some nodes are idle; in addition, when the terminal device of the destination address accesses the network through multiple network access devices, the network access of each path is included.
  • the devices are also different, and the network access device is load balanced.
  • the forwarding plane device 60 includes a sending module 601, a receiving module 602, and a forwarding module 603.
  • the sending module 601 is configured to send a plurality of IP data packets to the control plane device 61, wherein the plurality of IP data packet destination addresses are the same.
  • the receiving module 602 is configured to receive multiple paths returned by the control plane device after selecting multiple IP data packets in the routing table to be routed to the destination terminal device corresponding to the destination address, where one IP data packet corresponds to one path .
  • the forwarding module 603 is configured to attach the related information of the corresponding path to the IP data packet, and offload the multiple data packets to the multiple paths.
  • control plane device selects multiple paths to the destination address, and the forwarding plane device offloads multiple IP data packets to multiple paths, so that the SDN network is load balanced and improves network transmission efficiency.
  • the control plane device acquires the access information of the destination terminal device, and stores the access information in the routing table. Therefore, the control plane device selects
  • the path is also a network access device as a path node
  • the multiple paths include the network access device accessed by the destination terminal device, and the network access device through which at least two paths pass through the multiple paths does not exist. The same is to ensure the load balancing of the network access device of the destination terminal device, and further ensure the load balancing of the network.
  • the control plane device selects and forwards multiple paths of the multiple IP data packets, and the forwarding plane device offloads multiple IP data packets.
  • the transmission of the path is more balanced, so that the network load is more balanced, and some nodes are busy and some nodes are idle; in addition, when the terminal device of the destination address accesses the network through multiple network access devices, each path The network access devices are different, and the terminal device transmits data between the network and the network through multiple channels, improves data transmission efficiency between the two, implements data multi-stream aggregation, and makes the network access device load balanced.
  • the control plane device receives multiple IP packets with the same destination IP address from the forwarding plane device of the SDN network, and the control plane device queries the centralized routing table according to the destination IP address of the IP packet to obtain multiple different networks.
  • the network access device sends a plurality of path information corresponding to the terminal device to the destination IP address, and the control plane device returns a path information corresponding to each of the IP packets to the forwarding device of the SDN network. Therefore, the forwarding plane device of the SDN network transmits the multiple IP packets to the destination terminal device along different paths.
  • the SDN network is composed of a forwarding plane device, a control plane device, and a network access device, and the forwarding plane device includes a core switch cluster and a collection backhaul layer switch.
  • the aggregation backhaul switch is mainly used to aggregate wired network access devices and wireless network access devices.
  • the control plane device is responsible for the centralized route calculation of the IP packet and the optimal forwarding path calculation; each switch of the cluster is peer-to-peer load balanced, they are connected to each other, each switch has a channel to the control plane device, when an IP
  • the IP packet is first transmitted to the control plane device, and the control plane device queries the centralized routing table according to the destination IP address of the IP packet to obtain the address and port of the destination core switch, and according to the global ( The n-switch and the mutual path) traffic load balancing calculation obtains the best path to the destination switch/port.
  • the source switch forwards the IP packet to the destination switch according to the optimal path and then forwards it through the destination port.
  • the routing operator SDN network initiated by the terminal device can assign a fixed IPv6 address to the terminal device.
  • the IPv6 addresses of the terminal devices belonging to the SDN network of different domains are on different network segments, for example, belonging to different operators or the same carrier. Local and off-site SDN networks, etc.
  • the routing table records the specific location of the local area SDN network in the local area or the terminal equipment roaming to the local area in the local area. When a terminal equipment accesses a certain wireless base station of the local area SDN network, the wireless base station uses the terminal equipment IPv6.
  • the radio base station information corresponding to the address is saved by the routing table reported by the radio access layer/aggregation backhaul layer/core switching layer to the control plane device, when the terminal device enters the cell covered by another radio base station from the cell covered by one radio base station.
  • the routing table corresponding entry deletes the corresponding information of the terminal device Ipv6 address and the old base station, and increases the corresponding information of the terminal device IPv6 address and the new base station.
  • IP packet is uplinked and unified from the wireless base station to the aggregation backhaul switch to the source core switch, and then to the core layer control plane device for centralized route calculation and optimal forwarding path selection, and then returned to the source core switch at this time IP packet.
  • Attach all destination forwarding paths (including transit core switches/ports) None, the destination core switch/port, the aggregation backhaul switch/port, the destination radio base station, etc., are forwarded by the devices along the downlink to the destination terminal device according to the attached information of the IP packet.
  • the user terminal accesses the network from multiple network access devices at the same time, such as LTE/WIFI or multiple WIFI hotspots.
  • the plurality of network access devices such as the wireless base station and the WIFI router, report the wireless base station or the WIFI hotspot information currently corresponding to the IPV6 address of the user terminal to the centralized control plane device, and the control plane device saves the plurality of path related information in the centralized device. In the routing table.
  • the control plane device receives multiple IP packets with the same destination IP address from the forwarding plane device of the SDN network.
  • the SDN obtains multiple path information of the terminal corresponding to the destination IP address along multiple different network access devices according to the routing table of the destination IP address of the IP packet.
  • the control plane device returns the path information to a forwarding plane device of the SDN network by respectively mapping each of the IP packets to a different path information.
  • the control plane device returns a different path information of the IP packet to the forwarding plane device; or directly returns different path information to the forwarding plane device, and the forwarding plane device attaches a different path information to each IP packet. .
  • the forwarding plane device of the SDN network transmits the multiple IP packets to the target terminal along the different paths.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données, un dispositif de plan de commande et un dispositif de plan de réacheminement. Le procédé comporte les étapes consistant à: recevoir une pluralité de paquets de données IP téléchargés à partir d'un dispositif de plan de réacheminement; lorsque des adresses de destination de la pluralité de paquets de données IP sont identiques, sélectionner une pluralité de trajets pour acheminer la pluralité de paquets de données IP vers des dispositifs de terminaux de destination correspondant aux adresses de destination issues d'une table de routage; et envoyer la pluralité de trajets au dispositif de plan de réacheminement, de telle façon que le dispositif de plan de réacheminement distribue la pluralité de paquets de données IP à la pluralité de trajets, les paquets de données IP étant en correspondance biunivoque avec les trajets, et les paquets de données IP étant de plus munis d'informations pertinentes concernant les trajets correspondants. Au moyen du mode en question, la présente invention peut réaliser un équilibrage de la charge du réseau et améliorer le rendement de transmission du réseau.
PCT/CN2016/071314 2015-04-07 2016-01-19 Procédé de transmission de données, dispositif de plan de commande et dispositif de plan de réacheminement WO2016161836A1 (fr)

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