WO2013040970A1 - Procédé et dispositif de sélection de nœud de relais - Google Patents

Procédé et dispositif de sélection de nœud de relais Download PDF

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Publication number
WO2013040970A1
WO2013040970A1 PCT/CN2012/080373 CN2012080373W WO2013040970A1 WO 2013040970 A1 WO2013040970 A1 WO 2013040970A1 CN 2012080373 W CN2012080373 W CN 2012080373W WO 2013040970 A1 WO2013040970 A1 WO 2013040970A1
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WO
WIPO (PCT)
Prior art keywords
node
relay
relay node
information
access mode
Prior art date
Application number
PCT/CN2012/080373
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English (en)
Chinese (zh)
Inventor
王炜
胡永生
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
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Publication of WO2013040970A1 publication Critical patent/WO2013040970A1/fr

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/66Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for selecting a relay node.
  • multimedia services including Voice over Internet Protocol (VoIP) services, video on demand/live broadcast, software downloads, etc.
  • VoIP Voice over Internet Protocol
  • each node serves as a client to obtain services from other nodes, and also serves as a server to other nodes.
  • NAT Network Address Translation
  • the relay technology refers to a technique of performing packet forwarding by a relay node by adding one or more relay nodes to a packet packet delivery path. Compared with traditional IP routing technologies, the advantages of overlay network-based relay technology are:
  • - - Relay technology can implement NAT/firewall traversal. Provides data transfer function when the two parties cannot establish a connection directly.
  • Protocol conversion and data transfer functions are performed when both parties use different IP protocols.
  • the quality of service includes transmission delay, packet loss rate, transmission bandwidth, and delay jitter.
  • the relay technology can provide multiple optional transmission paths. When the default path is unreliable and the transmission fails, the service continuity can be guaranteed by quickly switching the transmission path.
  • the relay technology has been widely used in packet data networks.
  • the selection of the relay node is mainly implemented based on the addresses of the communication source node and the destination node, and the specific process is as shown in FIG. 1 , including step S102 to step S108 : Step S102 , relay
  • the service requester first obtains information (such as IP address or location information, etc.) of the communication source node and the destination node, and sends a relay service request message to the relay management entity to request the relay service.
  • the relay service requester may be a source or destination node participating in the communication, or may be another session management node.
  • Step S104 The relay management entity selects an appropriate relay node (referred to as a relay node A in this example) according to the information of the source node and the destination node, and the state information of the network that is stored or acquired, for the communication. service.
  • Step S106 the relay management entity communicates with the relay node A to reserve a relay resource.
  • Step S108 The relay management entity returns the selected relay node A and its reserved resource information to the relay service requester. According to the related information, the relay service requester assists the source node and the destination node to communicate through the relay node A.
  • the relay service requester assists the source node and the destination node to communicate through the relay node A.
  • the relay service requester needs to send multiple pairs of source node and destination node information each time to obtain multiple The relay node compares each path, and the required signaling interaction is complicated, and the relay selection time is long.
  • the relay service requester needs to send a pair of source node and destination node information each time through multiple requests. Obtaining multiple relay nodes, comparing each path, the required signaling interaction is complicated, and the relay selection time is long.
  • no effective solution has been proposed.
  • a primary object of the present invention is to provide a method and apparatus for selecting a relay node to solve at least the problem that the signaling interaction is complicated and the relay selection time is long.
  • a relay node selection method including: acquiring multiple access mode information of a source node and/or a destination node; and selecting at least one relay according to the multiple access mode information.
  • the foregoing access mode information includes at least one of the following: an IP address, an access network type, an access network status, and location information.
  • the method further includes: sending path information of the selected relay node and the source node and/or the destination node to the current relay service.
  • the requester wherein the path information includes: an access mode of the source node and/or the destination node, and relay node information corresponding to each access mode.
  • the plurality of pieces of path information constitute a path information list, and the path information list is transmitted to the requester.
  • the path information list further includes a priority order of each path information.
  • the above requester includes any one of the following: the source node, the destination node, and a third party proxy node.
  • the method further includes: the source node and the destination node establish communication by using the selected relay node.
  • the method further includes: selecting, in the selected relay node, the data according to the current network state of the core network and the state of the selected relay node.
  • the current network state of the core network includes at least one of the following: an interconnection situation of the core network; a network congestion condition of the core network; a delay of the core network; a network connection cost of the core network; The actual service quality test results of the core network; the carrier network optimization strategy.
  • the state of the selected relay node includes at least one of: a busy degree of the selected relay node; whether the selected relay node is overloaded; and whether the selected relay node is available.
  • a relay node selection apparatus including: an obtaining module, configured to acquire multiple access mode information of a source node and/or a destination node; and a selecting module, configured to The plurality of access mode information selects at least one relay node, wherein the selected relay node is configured to transmit data from the source node to the destination node.
  • the source node and/or the destination node have multiple access mode information, and when implementing, consider multiple access mode information to select a relay node, instead of considering one access mode at a time,
  • the relay service requester obtains multiple relay nodes through multiple requests, and does not need to compare multiple paths later, which reduces the complexity of signaling interaction and shortens the selection time of the relay node.
  • FIG. 1 is a relay node selection process according to the related art
  • FIG. 2 is a process flow diagram of a relay node selection method according to an embodiment of the present invention
  • FIG. 3 is a first embodiment of the present invention.
  • FIG. 4 is a flowchart of processing of a relay node selection method according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of processing of a relay node selection method according to Embodiment 3 of the present invention
  • 6 is a process flow diagram of a relay node selection method according to Embodiment 4 of the present invention
  • FIG. 7 is a schematic structural diagram of a relay node selection method according to an embodiment of the present invention.
  • the embodiment of the present invention provides a processing method for simultaneously selecting an optimal relay node and an access mode by considering multiple addresses of a source or destination node in a relay request process, which is also the present invention.
  • the design idea of the embodiment In order to solve the above technical problem, an embodiment of the present invention provides a method for selecting a relay node, and the processing flow thereof is as shown in FIG.
  • Step S202 Acquire multiple access mode information of a source node and/or a destination node
  • Step S204 Select at least one relay node according to multiple access mode information, where the selected relay node is used to transmit data from the source node to the destination node.
  • the source node and/or the destination node have multiple access mode information, and when implementing, consider multiple access mode information to select a relay node, instead of considering one access mode at a time, The relay service requester obtains multiple relay nodes through multiple requests, and does not need to compare multiple paths later, which reduces the complexity of signaling interaction and shortens the selection time of the relay node.
  • the access mode information mentioned in the embodiment of the present invention is information about the access mode of the terminal, and may be any one or more information that can determine the access mode of the terminal, for example, may be an IP address, an access network type, Any one of the information such as the access network status, the current location information of the terminal, and the like may also be a set of any two or more of the items, and the specific information is determined according to the actual situation.
  • Multiple access modes may be that the source node has multiple access modes, or the destination node has multiple access modes, or both have multiple access modes.
  • Multiple access modes refer to one or more differences in each access mode information. For example, the IP addresses are different, or the IP addresses are the same but the access network types are different, or the access network types are the same but the IP addresses are different.
  • the path information formed by the relay node selected in step S204 may be reported to this time.
  • the requester of the relay service that is, the relay service requester mentioned in the process shown in FIG. 1, specifically: sending the path information of the selected relay node and the source node and/or the destination node to the current relay The requester of the service; wherein the path information includes: an access mode of the source node and/or the destination node, and relay node information corresponding to each access mode.
  • the relay node information in the path information may include zero, one or more relay nodes.
  • the path information list may further include a priority order of each path information, for example, sorting from high to low according to priority, or sorting from low to high according to priority. The relay service requester does not need to compare the path optimization performance after obtaining the path information list, and only needs to select according to the priority.
  • the relay service requester may be a source node, a destination node, or a third party proxy node. After the relay node is selected, the source node and the destination node establish communication through the selected relay node, and send data from the source node to the destination node, and the data transmitted may be signaling, may be voice information, or may be other. Information, depending on the actual situation.
  • the relay node that transmits the data quality better than the preset threshold may be selected according to the current network state of the core network and the state of the selected relay node in the selected relay node.
  • the current network state of the core network can be judged according to any one or more of the following combinations: the interconnection of the core network; the network congestion of the core network; the delay of the core network; the network connection cost of the core network; Actual service quality test results; operator network optimization strategy.
  • the determination of the state of the selected relay node may be determined by any combination of one or more of the following: the degree of busyness of the selected relay node; whether the selected relay node is overloaded; whether the selected relay node is available.
  • the current network status of the core network and the status of the relay node can also be judged according to other information. Here, only a few items are listed, and the specific status in the implementation application depends on the specific situation.
  • the relay service requester will source the node And/or multiple access mode information of the destination node is sent to the relay management entity to request the relay service; the relay management entity selects one or more paths according to the access mode information of the source node and/or the destination node, and The path information is returned to the relay service requester.
  • the relay node selection method provided by the embodiment of the present invention, it will be described in the specific embodiment.
  • Embodiment 1 The network architecture involved in this embodiment is shown in FIG. 3.
  • the source node 301 needs to perform data communication with the destination node 302.
  • the data communication needs to be performed through one or more relay nodes (relay node A 303 and relay node B 304).
  • the relay management entity 305 can be used to select the relay node, and the relay node that is most suitable for the current communication is selected.
  • the specific selection process may be performed in conjunction with the access network status of the source node 301 and the destination node 302, the current network status of the core network, and the status of the relay node held by the relay management entity 305.
  • the current network status and relay node status of the core network may be acquired by the relay management entity 305.
  • the access network status of source node 301 and destination node 302 may be sent by the relay service requester to the relay management entity in the relay request.
  • the relay service requester may be the source node 301, the destination node 302, or a third party proxy node.
  • the present invention focuses on the case where the source node 301 or the destination node 302 has multiple access methods.
  • the multiple access modes may be that the source node 301 has more than one access mode, or the destination node 302 has more than one access mode, or the source node 301 and the destination node 302 have more than one access mode.
  • the multiple access modes mean that the source node 301 or the destination node 302 can use different access networks or use different under the same access network. Communication method for data communication.
  • a node can simultaneously perform IP communication through a wireless local area network and a cellular mobile communication network, the node can be regarded as having multiple access modes. Even if a node accesses only through a network, such as a NAT (Network Address Translation) device in the network, the node can communicate within the private network through the private network address, and can also be publicized through the public network address translated by NAT. Web communication. At this point, the node can also be considered to have multiple access methods. Specifically, in the entries such as the IP address, the access network type, and the location information included in the access mode information, if one or more of the entries are inconsistent, it can be considered as two different access modes.
  • the IP address can include the IP address itself and the address type.
  • the address type is used to indicate that the IP address is an IPv4 address or an IPv6 address, or is used to indicate that the IP address is a public network address or a private network address.
  • the network needs to comprehensively judge and select the relay node through multiple access methods. For example, when the source node and the destination node are both connected to the public network through the NAT, if the source node and the destination node only report the public network access mode in the relay request message, the relay management entity selects the public network address information according to the public network address information. Relay node.
  • the relay management entity can determine that the source destination node is actually in the same private network, and can use the private network. The address communicates directly without relaying.
  • the selection of the relay node should consider the network condition of the operator. For example, when the source node has both China Telecom's broadband access and China Mobile's wireless access mode, if the destination node is using China Mobile's wireless access method, the relay management entity may prefer both China Mobile's wireless. Access mode, and select the appropriate relay node according to the network situation of China Mobile.
  • the relay management entity 305 needs to consider multiple access modes of the source node and the destination node at the same time, and integrate the current network status of the core network and the status of the relay node.
  • the factors to be considered include, but are not limited to, the access network speed and delay of each access mode of the source or destination node, and the interconnection of the core network of each source or destination access mode pair, that is, whether the network is congested or not. Whether the requirements are met, etc.; actual service quality test results of the core network; whether the relay node is busy, overloaded or available, etc.; After considering the above factors, the relay management entity may prefer a suitable relay path.
  • the relay path refers to the information of the relay node and the path information of the relay node included in the path corresponding to the source and destination nodes.
  • the relay management entity may include one or more available relay paths in the relay path information list and return to the relay service requester.
  • the priority ranking information of each relay path may be included in the relay path information list.
  • the relay node may not include the relay node, that is, if the relay management entity considers that the direct connection path can meet the requirement, the access path of the source and destination nodes in the relay path is not Contains relay node information.
  • FIG. 4 depicts an embodiment of a relay node selection process in an embodiment of the present invention.
  • the relay management entity downloads the network topology information through the network topology information server, and completes the relay path selection process by itself.
  • the specific process is as follows: step S402 to step S410.
  • the relay management entity may collect the status information of the relay node before the process starts.
  • the status information of the relay node includes information such as the relay node address, the relay node access network information, the relay node load, and availability. These relay node status information can also be used for relay node selection.
  • Step S404 The relay service requester determines that the current communication requires a relay service, and the relay service requester sends a relay service request to the relay management entity, where the message includes the source node and/or the destination node of the current communication.
  • the access mode information includes one or more of an IP address, an access network type, an address type, and location information.
  • Step S406 The relay management entity integrates network topology information, quality of service measurement information, and relay node state information according to the access mode of the source node and the destination node, and selects an appropriate source node and a destination access mode pair for communication, and Select a suitable relay node A to perform relay service for the access mode path of the corresponding source node and/or destination node.
  • the relay management entity may perform real-time quality of service testing when selecting a relay node.
  • Step S408 the relay management entity communicates with the relay node A to reserve a relay resource.
  • Step S410 The relay management entity puts the selected relay node A and its reserved resource information into the relay path information, and indicates the corresponding source node and/or destination node access mode and relay node information. If the relay management is real The entity believes that there are other optional relay paths.
  • the relay management entity can generate multiple relay path information, form a relay path information list, and indicate the priority information of each path in the list.
  • the relay management entity returns the relay path information list to the relay service requester.
  • FIG. 5 depicts another embodiment of a relay node selection process in an embodiment of the present invention.
  • the selection of the relay node is implemented by the network topology information server.
  • the specific process is as follows: Step S502: Step S502: The relay service requester determines that the current communication requires a relay service, and the relay service requester sends a relay service request to the relay management entity, where the message includes the current Multiple access mode information of the source node or destination node of the communication.
  • the access mode information includes one or more of an IP address, an access network type, an address type, and location information.
  • Step S504 The relay management entity initially selects an appropriate available relay node according to the saved relay node information, and forms a candidate relay node list. The relay management entity sends the candidate relay node list and the access mode information of the source node and/or the destination node to the network topology information server for the relay path preference.
  • Step S506 The network topology information server integrates network topology information and relay node state information according to the access mode of the source node and/or the destination node, selects an appropriate source node and/or a destination access mode pair for communication, and selects A suitable relay node A performs relay service for the access mode path of the corresponding source node and/or destination node.
  • Step S508 The network topology information server generates relay path information according to the selected relay node A and its corresponding source node and/or destination node access mode, and puts the relay path information into the relay path information list and returns to the relay management. entity.
  • the relay information list may contain multiple relay paths and contain priority information of the relay paths.
  • the relay management entity communicates with the relay node A to reserve a relay resource.
  • the relay management may refer to the real-time quality of service measurement information before the selected relay node.
  • the relay service requester establishes a data communication path between the source node and the destination node according to the relevant relay path information, and the source destination node starts data communication through the relay node A.
  • FIG. 6 describes a flow of how a relay service requester establishes a relay path according to relay path information in the present invention.
  • Step S602 The source node needs to communicate with the destination node.
  • the source node sends a service request message to the relay service requester, where the message includes multiple access mode information of the source node.
  • Step S604 The relay service requester contacts the destination node to obtain access mode information.
  • the destination node can have one or more access methods.
  • the relay service requester determines that the current service may require a relay node according to the access mode of the source node and the destination node.
  • Step S606 The relay service requester sends a relay service request to the relay management entity, where the message includes multiple access modes of the source or destination node.
  • Step S608 The relay management entity performs relay node selection, and determines a relay path information list.
  • Step S610 The relay management entity returns the relay path information list to the relay service requester.
  • Step S612 The relay service requester notifies the destination node of which access mode should be selected for communication according to the access mode and the relay node information in the relay path information, and informs the related connection of the relay node A to be connected. information.
  • Step S614 The relay service requester notifies the destination node of which access mode should be selected for communication according to the access mode and the relay node information in the relay path information, and informs the related connection of the relay node A to be connected. information. Note: Step S612 and step S614 can be interchanged or performed simultaneously.
  • Step S616 The source node and the destination node connect to the relay node A according to the information provided by the relay service requester by using the access mode given by the relay service requester. The source node and the destination node start data communication through the relay node A. Based on the same inventive concept, an embodiment of the present invention further provides a relay node selection apparatus, and a schematic structural diagram thereof is shown in FIG. 7.
  • the method includes: an obtaining module 701, configured to acquire multiple accesses of a source node and/or a destination node.
  • Mode information The selection module 702 is coupled to the acquisition module 701 and configured to select at least one relay node according to the plurality of access mode information, wherein the selected relay node is configured to transmit data from the source node to the destination node.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de sélection de nœud de relais. Le procédé comprend les étapes consistant à : obtenir des informations de multiples modes d'accès d'un nœud d'origine et/ou d'un nœud de destination ; et sélectionner au moins un nœud de relais en fonction des informations de multiples modes d'accès, le nœud de relais sélectionné étant utilisé pour transférer des données du nœud d'origine au nœud de destination. La solution technique d'après la présente invention règle le problème de l'art connexe dû au fait que l'interaction de signalisation pendant le processus de sélection de nœud de relais est compliquée et que le temps de sélection de relais est long.
PCT/CN2012/080373 2011-09-22 2012-08-20 Procédé et dispositif de sélection de nœud de relais WO2013040970A1 (fr)

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CN201110284210.4A CN103023729A (zh) 2011-09-22 2011-09-22 中继节点选择方法及装置

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CN110139337A (zh) * 2018-02-09 2019-08-16 电信科学技术研究院有限公司 一种中继节点的选择方法及设备
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CN111538772B (zh) * 2020-04-14 2023-07-04 北京宝兰德软件股份有限公司 数据的交换处理方法、装置、电子设备及存储介质
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