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WO2012083803A1 - Procédé et système relatifs à l'héritage de propriété pour une qualité de service dans un réseau identificateur - Google Patents

Procédé et système relatifs à l'héritage de propriété pour une qualité de service dans un réseau identificateur Download PDF

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Publication number
WO2012083803A1
WO2012083803A1 PCT/CN2011/083878 CN2011083878W WO2012083803A1 WO 2012083803 A1 WO2012083803 A1 WO 2012083803A1 CN 2011083878 W CN2011083878 W CN 2011083878W WO 2012083803 A1 WO2012083803 A1 WO 2012083803A1
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WIPO (PCT)
Prior art keywords
qos
data packet
priority information
agr
source
Prior art date
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Ceased
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PCT/CN2011/083878
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English (en)
Chinese (zh)
Inventor
何辉
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ZTE Corp
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ZTE Corp
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Anticipated expiration legal-status Critical
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Classifications

    • 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
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2408—Traffic characterised by specific attributes, e.g. priority or QoS for supporting different services, e.g. a differentiated services [DiffServ] type of service

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a service quality priority inheritance method and system in an identification network.
  • the IP address in the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol widely used by the Internet has a dual function, and serves as the location of the network terminal's communication terminal host network interface in the network topology.
  • the identity which is also the identity of the transport layer host network interface.
  • the TCP/IP protocol was not designed with host mobility in mind. However, as host mobility becomes more prevalent, the semantic overload defects of such IP addresses are becoming increasingly apparent.
  • the IP address of the host changes, not only the route changes, but also the identity of the communication terminal host changes. This will cause the routing load to become heavier and heavy, and the change of the host identity will also cause the application and connection to be interrupted.
  • the purpose of identification and location separation is to solve the problem of semantic overload and severe routing load of IP addresses, and to separate the dual functions of IP addresses to achieve dynamic redistribution of mobility, multiple townships, IP addresses, and mitigation of routes. Support for issues such as load and mutual visits between different network areas in the next generation Internet.
  • the network router based implementation method is one of the solutions for identity identification and location separation.
  • the latter scheme is simply referred to as the identification network, that is, the identity and location separation network.
  • the basic idea of this scheme is:
  • the network is divided into the access layer and the core layer.
  • the mobile node in the network has two types of identification: User identity (Access Identifier, AID for short) and Routing-Location Identifier (RID).
  • AID User identity
  • RID Routing-Location Identifier
  • the AID remains unchanged during the mobile process.
  • the AID can only be used at the access layer.
  • the RID can only be used at the core layer.
  • the AID is used to identify the peer.
  • the identification network mainly includes: a radio access network (RAN;), an access gateway router (Access Gateway Router, AGR for short), General Switch Router (GSR), Identifier Mapping Server (IDMS), and authentication center.
  • RAN radio access network
  • Access Gateway Router Access Gateway Router, AGR for short
  • GSR General Switch Router
  • IDMS Identifier Mapping Server
  • AGR responsible for providing access services for various mobile nodes (MNs), for access
  • the main function of the GSR is to select and forward data packets based on the routing location identifier RID in the data packet.
  • IDMS is mainly responsible for maintaining the mapping between user identity and location identity in the network, and providing query services to access gateway routers and other mapping servers.
  • the network can be divided into an access network and a backbone network.
  • the access network is located at the edge of the backbone network and is responsible for access by all terminals.
  • all user terminals are addressed using the AID.
  • the backbone network is responsible for routing of terminals accessed through different access networks. There is no overlap between the access network and the backbone network in the topology relationship.
  • the application layer between the communication hosts uses the AID to identify the peer. The communication between the user terminals only needs to use the AID of the peer.
  • the access gateway router is located at the demarcation point between the backbone network and the access network, and interfaces with the access network and the backbone network to provide access services for the terminal, maintain user connections, and forward user data. All communication of the user terminal is forwarded and managed by the access gateway router of the access network.
  • the operator is required to provide policy support to provide differentiated service quality for the user.
  • QoS Quality of Service
  • the QoS priority information carried in the data packet is not successfully inherited during the transmission process, causing delay and jitter of data in the network transmission.
  • the increase in packet loss rate is not successfully inherited during the transmission process.
  • the technical problem to be solved by the present invention is to provide a service quality priority inheritance method in an identification network. And the system, so that the destination AGR determines the QoS service policy based on the source QoS priority information.
  • the present invention provides a method for inheriting a quality of service priority in an identification network, the method comprising:
  • the source AGR encapsulates and sends a data packet to the backbone network, which carries QoS priority information.
  • the destination end AGR receives the data packet sent by the backbone network, and determines the QoS service policy according to the QoS priority information.
  • the QoS priority information in the data packet is represented by the Type of Service field of IPV4 or the Traffic Class field of IPV6.
  • Both the inner layer and the outer layer of the data packet carry QoS priority information, and the destination end AGR determines the QoS service policy according to the inner layer or outer layer QoS priority information.
  • the method further includes: after the GSR of the backbone network receives the data packet, modifying the QoS priority information of the outer layer according to the local configuration or modifying the QoS priority information of the outer layer and the inner layer and sending the information.
  • the data packet sent by the source end AGR carries the QoS priority information corresponding to the source end MN.
  • the above method can also have the following characteristics:
  • the method further includes: when the source AGR requests the authentication center to authenticate the source MN, acquiring the QoS priority information of the source MN, and buffering the correspondence between the AID of the source MN and the QoS priority information, where The source AGR determines the QoS priority according to the correspondence between the source AID query caches.
  • the method further includes: after determining the QoS service policy, the destination end AGR performs differentiated scheduling processing on the received packet according to the service policy.
  • the present invention also provides a quality of service priority inheritance system in an identification network, which includes: a source AGR, which is configured to: encapsulate and send a data packet to a backbone network, where carrying QoS priority Level information
  • the destination end AGR is set to: Receive a data packet sent by the backbone network, and determine a QoS service policy according to the QoS priority information therein.
  • the QoS priority information in the data packet is represented by the Type of Service field of IPV4 or the Traffic Class field of IPV6.
  • Both the inner layer and the outer layer of the data packet carry QoS priority information, and the destination end AGR is set to determine a QoS service policy according to inner layer or outer layer QoS priority information.
  • It also includes a GSR located in the backbone network, which is configured to: receive the data packet, and modify the QoS priority information of the outer layer or modify the QoS priority information of the outer layer and the inner layer according to the local configuration and transmit.
  • a GSR located in the backbone network, which is configured to: receive the data packet, and modify the QoS priority information of the outer layer or modify the QoS priority information of the outer layer and the inner layer according to the local configuration and transmit.
  • the data packet sent by the source end AGR carries the QoS priority information corresponding to the source end MN.
  • the above system can also have the following characteristics:
  • the source AGR is further configured to: obtain the QoS priority information of the source MN, and cache the correspondence between the AID of the source MN and the QoS priority information when requesting the authentication of the source MN by the authentication center, The source AGR determines the QoS priority according to the correspondence between the source AID query caches.
  • the destination end AGR is further configured to: after determining the QoS service policy, perform differential scheduling processing on the received packet according to the service policy.
  • the present invention also provides an AGR, which includes a data packet sending module as a source AGR, and includes a data packet receiving module as a destination end AGR, where
  • the data packet sending module is configured to: encapsulate and send a data packet to the backbone network, where the QoS priority information is carried;
  • the data packet receiving module is configured to: receive a data packet sent by the backbone network, and determine a QoS service policy according to the QoS priority information therein.
  • the QoS priority information in the data packet is represented by the Type of Service field of IPV4 or the Traffic Class field of IPV6.
  • the data packet sending module is configured to carry QoS priority information in both inner and outer layers of the data packet when the data packet is encapsulated;
  • the data packet receiving module is configured to determine a QoS service policy based on inner or outer QoS priority information of the received data packet.
  • the data packet sending module is configured to: carry the QoS priority information corresponding to the source end MN when the data packet is encapsulated.
  • a cache module configured to: obtain, by the authentication center, the QoS priority information of the source MN, and cache the correspondence between the AID of the source MN and the QoS priority information;
  • the QoS priority determining module is configured to: determine a QoS priority according to the source AID querying the corresponding relationship of the cache module cache.
  • the target AGR further includes: a scheduling processing module, configured to: after the data packet receiving module determines the QoS service policy, perform differential scheduling processing on the received packet according to the service policy.
  • the encapsulated data packet can be normally routed on the IP backbone network, and the router on the existing backbone network does not need to be modified; and the source packet priority can be inherited in the generalized forwarding plane; And the destination node receives the data packet, which can be based on the source package
  • the QoS policy is provided by the first level to ensure the delay, jitter and packet loss rate of the data in the network transmission.
  • FIG. 1 is a schematic diagram of a network topology of a network-based identity and location separation architecture of the related art
  • FIG. 2 is a schematic diagram of a method for inheriting a QoS priority in an identification network according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a data packet of a GRE packet format according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a data packet in a GRE packet format in an identification network according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a packet processing process in an inheritance mode according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a process of processing a packet of a trusted IP according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a packet processing process of a trusted user according to an embodiment of the present invention. Preferred embodiment of the invention
  • the QoS priority information is carried in the data packet, and the destination end AGR performs QoS scheduling according to the QoS priority information in the data packet.
  • the service quality priority inheritance method in the identification network of the embodiment of the present invention includes:
  • Step 201 The source AGR encapsulates and sends a data packet to the backbone network, where the QoS priority information is carried.
  • GRE Generic Routing Encapsulation
  • the packets that need to be encapsulated and delivered to a destination are net payloads.
  • the payload data packet is first encapsulated in a GRE data packet and carried and forwarded by another protocol.
  • the outer layer protocol for carrying internal messages is called a delivery protocol.
  • the identity identifier packet is used as the payload datagram, and the location identifier is used as the bearer protocol header, as shown in FIG.
  • RFC0791 defines the packet header format of the IPV4 protocol, where the Type of Service field is used to indicate the QoS class of service that traffic is transmitted over the IP network.
  • RFC2460 defines the packet header format of the IPV6 protocol.
  • the Traffic Class (TC) field is the same as the Type of Service (ToS) field in IPV4. It also defines the QoS class of traffic in the IP network transmission.
  • the QoS priority information in the data packet may be represented by a Type of Service field of the IPV4 protocol or a Traffic Class field of the IPV6 protocol.
  • the inner layer and the outer layer of the data packet may each carry QoS priority information, and the destination end AGR determines the QoS service policy according to the QoS priority information of the inner layer or the outer layer;
  • GSR generalized gateway router
  • the data packet sent by the source end AGR carries the QoS priority information corresponding to the source end MN.
  • the authentication center stores the user's identity information (AID), and sets the QoS priority of the user through the policy.
  • AID user's identity information
  • the source AGR requests the authentication center to authenticate the source MN, the QoS priority of the source MN is obtained. And the corresponding relationship between the AID of the source MN and the QoS priority is cached, and the source AGR determines the QoS priority according to the correspondence between the source AID query cache.
  • Step 202 The destination end AGR receives the data packet sent by the backbone network, and determines the QoS service policy according to the QoS priority information therein.
  • the received message is placed in the buffer queue corresponding to the scheduling priority according to the QoS priority;
  • the scheduling priority scheduling process corresponds to the packet in the buffer queue. The higher the QoS priority of the packet, the higher the scheduling priority and the smaller the packet processing delay. This allows users to take advantage of differentiated, detailed services.
  • the QoS priority is mapped to the ToS field of the IPV4 or the TC field of the IPV6, and the network elements on the IP backbone network define a QoS service policy based on the IPV4 ToS or the IPV6 TC, thereby reducing the delay and jitter of the traffic on the network. And packet loss rate.
  • the embodiment of the present invention defines three modes:
  • Inherit mode During the transmission process, the inner and outer QoS priority information of the data packet are modified, and the destination end determines the QoS service policy according to the outer or inner layer information, as shown in Figure 5: AGR, the ToS field of the IPV4 protocol in the inner and outer layers of the data packet or the TC field of the IP V6 protocol is assigned according to the QoS priority of the source MN. As shown in the figure, the QoS priority of the source MN is 3, which is expressed as User CoS3, the ToS field or the TC field of the outer layer and the inner layer are all assigned 3, which are respectively represented as IP ToS3 and user CoS3;
  • the IP backbone device modifies the ToS field or the TC field according to the local configuration, and changes the assignment of the ToS field or the TC field of the outer layer and the inner layer to 2, which are respectively represented as IP ToS2 and user CoS2;
  • AGR At the destination end, when AGR receives a packet, it defines the QoS service policy according to the assignment of the inner or outer IPV4 ToS and IPV6TC.
  • Trust IP mode During the transmission process, the outer QoS priority information of the data packet is modified, and the destination end determines the QoS service policy according to the inner layer information, as shown in Figure 6.
  • the ToS field of the IPV4 protocol of the inner and outer layers of the data packet or the TC field of the IPV6 protocol is assigned according to the QoS priority of the source MN.
  • the QoS priority of the source MN is assigned to 3, Expressed as user CoS3, the outer and inner ToS fields or TC fields are assigned The value is 3, which is represented as IP ToS3 and user CoS3 respectively;
  • the IP backbone network device modifies the ToS field or the TC field according to the local configuration, and changes the assignment of the outer ToS field or the TC field to 2, which is represented as IP ToS2, but the inner layer field assignment is unchanged;
  • the AGR determines the QoS service policy based on the assignment of the outer IPV4 ToS or IPV6 TC.
  • the ToS field of the IPV4 protocol of the inner and outer layers of the data packet or the TC field of the IPV6 protocol is assigned according to the QoS priority of the source MN.
  • the QoS priority of the source MN is assigned to 3, Indicated as the user CoS3, the ToS field or the TC field of the outer layer and the inner layer are assigned the value 3, which are respectively represented as IP ToS3 and user CoS3;
  • the IP backbone network device modifies the ToS field or the TC field according to the local configuration, and changes the assignment of the outer ToS field or the TC field to 2, which is represented as IP ToS2, but the inner layer field assignment is unchanged;
  • the AGR determines the QoS service policy based on the assignment of the inner IPV4 ToS or IPV6 TC.
  • the AGR obtains the QoS service level corresponding to the user identity when authenticating to the authentication center.
  • the source AGR device queries the mapping entry of the AID-RID, and the QoS priority corresponding to the MN, and the RID information is encapsulated into the IP Header, and the QoS priority is inherited to the inner and outer IPV4 ToS fields. ;
  • the IP backbone network device modifies the IPV4 ToS field of the inner layer and the outer layer according to the local configuration
  • the present invention also provides a quality of service priority inheritance system in an identification network.
  • the system includes:
  • the source access gateway router is configured to encapsulate and send a data packet to the backbone network, where the quality of service (QoS) priority information is carried;
  • the destination end AGR is configured to receive a data packet sent by the backbone network, and determine a QoS service policy according to the QoS priority information therein.
  • the QoS priority information in the data packet may be represented by a Type of Service field of the IPV4 protocol or a Traffic Class field of the IPV6 protocol.
  • Both the inner layer and the outer layer of the data packet may carry QoS priority information, and the destination end AGR determines the QoS service policy according to the inner layer or outer layer QoS priority information.
  • the system may further include a generalized gateway router (GSR) located in the backbone network, configured to receive the data packet, and modify the QoS priority information of the outer layer according to the local configuration or modify the QoS priority information of the outer layer and the inner layer and send the QoS priority information.
  • GSR generalized gateway router
  • the data packet sent by the source AGR carries the QoS priority information corresponding to the source mobile node (MN).
  • the embodiment of the present invention further provides an AGR, where the AGR is used as a source AGR, and includes a data packet sending module, where the AGR is used as a destination end AGR, and includes a data packet receiving module, where
  • the data packet sending module is configured to: encapsulate and send a data packet to the backbone network, where the QoS priority information is carried;
  • the data packet receiving module is configured to: receive a data packet sent by the backbone network, and determine a QoS service policy according to the QoS priority information therein.
  • the QoS priority information in the data packet uses a Type of Service field of Network Protocol Version 4 (IPV4) or a Traffic Class field of Network Protocol Version 4 (IPV6). Said.
  • IPV4 Type of Service field of Network Protocol Version 4
  • IPV6 Traffic Class field of Network Protocol Version 4
  • the data packet sending module is configured to: when the data packet is encapsulated, in the data packet Both inner and outer layers carry QoS priority information;
  • the data packet receiving module is configured to determine a QoS service policy based on inner or outer QoS priority information of the received data packet.
  • the data packet sending module is configured to: carry the QoS priority information corresponding to the source mobile node (MN) when the data packet is encapsulated.
  • MN source mobile node
  • the method further includes:
  • a cache module configured to: obtain, by the authentication center, the QoS priority information of the source MN, and cache the correspondence between the AID of the source MN and the QoS priority information;
  • the QoS priority determining module is configured to: determine a QoS priority according to the source AID querying the corresponding relationship of the cache module cache.
  • the AGR as the destination AGR, further includes a scheduling processing module, configured to: after the data packet receiving module determines the QoS service policy, perform differential scheduling processing on the received packet according to the service policy.
  • a scheduling processing module configured to: after the data packet receiving module determines the QoS service policy, perform differential scheduling processing on the received packet according to the service policy.
  • the embodiment of the present invention has the following beneficial effects:
  • the encapsulated data packet can be normally routed on the IP backbone network, and the router on the existing backbone network does not need to be modified; the source packet priority is guaranteed to be inherited in the generalized forwarding plane;
  • the intermediate node and the destination end node receive the data packet, and can provide the QoS policy based on the priority of the source end encapsulation to ensure the delay, jitter, and packet loss rate of the data in the network transmission.

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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 système relatifs à l'héritage de propriété pour une qualité de service (QoS) dans un réseau identificateur. Le procédé consiste en ce qui suit : un routeur de passerelle d'accès (AGR) de source prépare et transmet un paquet de données à un réseau de base en y incluant une information de priorité sur la qualité de service (QoS); un AGR de destination reçoit le paquet de données transmis par le réseau de base et sur la base des informations prioritaires QoS y incluses confirme une stratégie de service QoS. Le procédé et le système de la présente invention permettent de confirmer la stratégie de service QoS par l'AGR de destination sur la base des informations prioritaires QoS de source.
PCT/CN2011/083878 2010-12-22 2011-12-13 Procédé et système relatifs à l'héritage de propriété pour une qualité de service dans un réseau identificateur Ceased WO2012083803A1 (fr)

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CN201010601097.3 2010-12-22
CN2010106010973A CN102571537A (zh) 2010-12-22 2010-12-22 标识网中的服务质量优先级继承方法和系统

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CN111193621B (zh) * 2019-12-30 2022-09-23 上海锐伟电子科技有限公司 一种物联网rtos设备端与服务端保障数据通信的方法

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CN101136866A (zh) * 2007-10-15 2008-03-05 北京交通大学 一体化网络网通层服务质量保证结构和运行方法

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