WO2007121671A1 - Procédé et système de transfert intercellulaire entre réseaux hétérogènes - Google Patents

Procédé et système de transfert intercellulaire entre réseaux hétérogènes Download PDF

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Publication number
WO2007121671A1
WO2007121671A1 PCT/CN2007/001306 CN2007001306W WO2007121671A1 WO 2007121671 A1 WO2007121671 A1 WO 2007121671A1 CN 2007001306 W CN2007001306 W CN 2007001306W WO 2007121671 A1 WO2007121671 A1 WO 2007121671A1
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WIPO (PCT)
Prior art keywords
terminal
network
service network
handover
service
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PCT/CN2007/001306
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English (en)
Chinese (zh)
Inventor
Yan Peng
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Huawei Technologies Co. Ltd.
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Application filed by Huawei Technologies Co. Ltd. filed Critical Huawei Technologies Co. Ltd.
Publication of WO2007121671A1 publication Critical patent/WO2007121671A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for a terminal to switch between heterogeneous networks. Background technique
  • IEEE 802 Wireless Working Group established the IEEE 802 Switching Research Group - Handoff ECSG, which was later officially named IEEE 802.21 Working Group.
  • the purpose of the IEEE 802.21 project is to improve the user's mobile experience. Switching through the secondary networks, regardless of whether they are of the same media type, including wired and wireless, makes it possible for mobile devices to seamlessly switch with network environment support.
  • the existing mobile IP (MIP Mobile IP) solution can be considered to implement layer 3 switching, so that the user can ensure the continuity of the upper layer service after the network address is changed. However, there is still a period when the underlying link between the user and the network is completely disconnected, thereby affecting the QoS of the service (increased metrics such as delay, jitter, etc.).
  • the purpose of IEEE 802.21 is to help achieve network switching at the link layer, thereby improving the user experience.
  • MIHF Media Independent Handover Function
  • MIES Media Independent Event Service Provides event classification, event filtering, and event reporting of dynamically changing events on link characteristics, link status, and link quality;
  • MICS Media Independent Command Service Provides MIH user management and control of link behavior related to handover and mobility;
  • MIIS Media Independent Information Service Provides detailed information on the characteristics and services of the service network and surrounding networks for effective system access and handover decisions.
  • MIHF is logically defined as a thin layer in the mobility management protocol stack of the terminal and network, which functions as a helper and booster in the handover decision.
  • MIHF provides some necessary information for the upper layer to make handover decisions and how to effectively make handover decisions.
  • the upper layer makes switching decisions and link selection based on MIHF input and context, which makes it possible to achieve seamless handover.
  • the MIHF location and key services are shown in Figure 1.
  • IEEE 802.21 also defines a media-independent handover protocol, primarily for the following processes:
  • MIH capability discovery The MIHF of the terminal or network discovers which entity supports the MIH function and the extent of support;
  • MIH remote registration MIHFs of different network elements can register with each other to accept media-independent switching messages, including remote events;
  • MIH message interaction MIHF at both ends can interact with the MIH protocol through appropriate transmission methods.
  • the protocol format, message format and message interaction process are specified in the protocol.
  • This message is communicated between the network and the MIHF of the terminal to request the start of the handover.
  • MIH HO— Candidate — Query request
  • the handover can be initiated by the terminal or the network side.
  • the message is MIHF communication in the service network and the target network, used to target
  • the network queries for available resources.
  • the message is MIH Handover Prepare in the target network and the service network that issued the handover preparation request.
  • MIHF communication used to 'respond to resource status.
  • MIH_HO__Commit (In some request this message is used to request that the switch be submitted to the selected link and PoA.
  • MIH MIH
  • Handover Complete This message is used to respond to the handover completion message.
  • FIG. 2 Using the above four pairs of messages, a typical handover procedure triggered by the terminal is shown in FIG. 2. It includes the following steps:
  • the terminal sends a media independent handover candidate network query request (MIH_HO_Candidate_Query request) to the serving network service point (Serving PoS);
  • the Serving PoS sends a media independent handover resource query request (MIH_HO_Query_Resource request) to the target network service point (Target PoS);
  • the target network service point sends a media independent handover resource query response (MIH_HO_Query_Resource response) to the serving network service point (Serving PoS);
  • MIH_HO_Query_Resource response media independent handover resource query response
  • the Serving PoS sends a media independent handover candidate network query response (MIH_HO_Candidate_Query response) to the terminal (STA/UE).
  • MIH_HO_Candidate_Query response media independent handover candidate network query response
  • the terminal sends a media independent handover submission request (MIH_HO_Commit request) to the serving network service point (Serving PoS);
  • the Serving PoS sends a media independent handover request (MIH_HO_Commit request) to the target network service point (Target PoS); 5207.
  • the target network service point (Target PoS) sends a media independent handover submission response (MIH_HO_Commit response) to the serving network service point (Serving PoS);
  • the serving network monthly service point sends a media independent handover submission response (MIH_HO_Commit response) to the terminal (STA/UE);
  • the target network service point sends a media independent handover completion request (MIH_HO_Complete request) to the serving network service point (Serving PoS);
  • Service Network Monthly Service Point sends a media independent handover completion response (MIH_HO_Complete response) to the target network monthly service point (Target PoS).
  • MIH_HO_Complete response media independent handover completion response
  • the service network PoS needs to send the handover submitted message MIH_HO_Commit request to the target network PoS, and inform the terminal that the handover is to be submitted to the network.
  • the target network PoS needs to send the message MIH_HO_complete request of the terminal handover success to the original service network of the terminal, to inform the original service network that the user has successfully entered the new network, and switches.
  • the buffered packets can be forwarded to the new PoS and the relevant resources are released.
  • the service network notifies the target network through the MIH_HO_Commit request message, and new terminals will enter the network in a switched manner.
  • the message contains three fields, where New Link Identifier refers to the identifier of the target network to be attached (one of IEEE802 network or cellular network), and NewPoAMac is the MAC address of the target network PoA to be attached to.
  • NewLinkAction refers to what should be done for the original link.
  • PoS 1 and PoS2 both switch to the network where PoS3 is located.
  • PoS3 needs to return to the original month service network of MN1 and MN2.
  • Successful response message The original service network PoS3 cannot determine the original service networks PoS1 and PoS2 served by MN1 and MN2 because the original service network notifies the target network that there is a terminal handover entry and does not carry the relevant information of the terminal. Summary of the invention
  • the embodiments of the present invention provide a method and a system for a terminal to switch between networks, which are used to solve the problem in the prior art that after the terminal successfully switches, the target network does not know the service network information, and may not send related messages to the service. Network problems.
  • a method for a terminal to switch between heterogeneous networks includes:
  • the service network interacts with the terminal to trigger terminal handover
  • the target network prepares resources for the terminal, and the service network control terminal performs a handover operation. After the terminal handover is completed, the target network sends a terminal handover success message to the service network according to the terminal and the service network association information.
  • a system for switching a terminal between heterogeneous networks including a service network and a target network for providing access services for the terminal, and further comprising:
  • Switching a trigger unit, configured to trigger a terminal switching operation
  • a resource preparation unit located in the target network, configured to prepare resources for the terminal
  • a handover control unit located in the service network, configured to control the terminal to perform handover
  • the terminal and service network association information setting unit is located in the target network, and is used to set the terminal and service network association information
  • the terminal handover success message sending unit is located in the target network, and is used according to the terminal and the service network.
  • the network association information sends a terminal handover success message to the service network.
  • the terminal can find the service network corresponding to each terminal during the inter-network handover process, thereby ensuring the smooth handover process.
  • FIG. 1 is a schematic diagram of a MIHF position and a key service in the prior art
  • FIG. 2 is a schematic diagram of a handover process of a terminal trigger in the prior art
  • Embodiment 1 of the present invention is a schematic flowchart of Embodiment 1 of the present invention.
  • FIG. 5 is a schematic flowchart of Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a system for switching a terminal between heterogeneous networks according to Embodiment 6 of the present invention. detailed description
  • Embodiment 1 The service network and the target network are general networks.
  • Embodiment 1 of the present invention mainly includes the following steps:
  • the service network PoS interacts with the terminal to trigger terminal handover.
  • the step may be initiated by the terminal or initiated by the network side.
  • the terminal needs to be switched to the target network PoS according to the terminal movement or the system performance requirement
  • the terminal interacts with the service network PoS, and the service network and the candidate network exchange information transmit the related information.
  • the service network and the candidate network exchange information transmit the related information.
  • the terminal trigger the switching process.
  • This step can be carried out by MIH-HO-Candidate-Query request/response message and MIH_HO_Query_Resource request/response message.
  • the response message bearer carries the terminal identifier, and the information exchange enables the service network PoS to learn the terminal identifier, and prepares for establishing the association relationship between the terminal identifier and the service network PoS in the subsequent step.
  • the terminal there may be multiple target network PoSs, and information of the multiple target networks may be transmitted to the terminal for handover decision.
  • the service network PoS controls the terminal to perform a handover operation, and the target network PoS prepares resources for the terminal.
  • the service network PoS interacts with the target network PoS to exchange terminal switching information, and the target network PoS prepares resources for terminal handover, and waits for the terminal to switch.
  • This step can be carried out by the MIH-HO-Commit request/response message between the terminal and the service network and between the service network and the target network.
  • the service network PoS sends the terminal identifier to the target network PoS, and the terminal identifier may be carried by the MH-HO_Commit request.
  • the target network PoS receives the terminal identification information, the association relationship between the terminal identifier and the service network PoS may be established.
  • the target network PoS sends a terminal handover success message to the service network PoS according to the association information between the terminal and the service network PoS.
  • the terminal identifier may be a media access control address (MAC address) of the terminal in the target network. If in an IEEE 802 series network, the MAC address is an IEEE defined 48-bit MAC address. If in a 3GPP/3GPP2 network, the MAC address is an IMSI International Mobile Subscriber Identity in BCD format.
  • MAC address media access control address
  • the target network may be multiple, so that the terminal identifier may be a MAC address corresponding to the terminal in multiple target networks.
  • the three types of messages are involved.
  • the format of the message may be modified, and the terminal identifier is carried by adding a corresponding field, as follows:
  • This message is used in the handover process, the service network PoS informs the target network PoS, MN Switching to the target network soon.
  • Modify Add a "Terminal Identifier" field to the message.
  • the identifier should be able to uniquely identify the terminal, and the terminal should report the field to the target network PoS when switching to the target network PoS.
  • the terminal accesses the target network, it reports its own MAC address to the target network. Therefore, it is possible to consider the terminal's MAC address as the terminal identifier.
  • the format and meaning of the terminal MAC address are different due to different network systems.
  • the MAC addresses on different mode interfaces are also different, and when entering the network, the MAC address on the corresponding network interface needs to be used as the terminal identifier. Therefore, when performing handover between different types of networks, the service network PoS needs to bring the MAC address used by the terminal in the target network to the target network PoS in the request message MIH_HO_Commit request for submitting the handover. In this way, the target network PoS prepares resources for the designated terminal and establishes an association between the terminal and its original service network PoS.
  • the target network PoS can find the original service network PoS of the terminal according to the established terminal and the original service network PoS mapping table according to the MAC address reported by the terminal at the time of access, and then notify the handover. It has been successful and can be followed by a follow-up process.
  • This message is communicated between the network and the terminal's MIHF to request a start of the handover.
  • This message is communicated between the network and the MIHF of the terminal, and is used to respond to the start request of the handover.
  • Embodiment 2 The service network is a 3GPP2 network, and the target network is a WLAN network.
  • This embodiment 2 describes the case where the terminal triggers the handover.
  • the MIH-HO-Candidate-Query request message and the MIH-HO-Commit request message carry the terminal MAC address, and the terminal is associated with the service network PoS. As shown in Figure 4, it mainly includes the following steps:
  • the S401 terminal sends a MIHJHO_Candidate_Query request message to the service network PoS to trigger the handover.
  • the MAC address of the terminal in the target network needs to be carried in the form of an IEEE-defined 48-bit MAC address.
  • the service network PoS sends a MIH_HO_Query_Resource request message to the target network PoS to query the status of the target network resource.
  • Target Network The PoS sends a MIH_HO_Query_Resource response to the service network to inform itself of the resource status, so as to switch the decision.
  • the service network PoS sends an MIH_HO_Candidate_Query response message to the terminal, indicating that the network side agrees to the handover request of the terminal.
  • the terminal sends an MIH_HO_Commit request message to the serving network PoS, indicating that the handover is submitted to the selected link and the PoS.
  • the service network PoS sends an MIH_HO_Commit request message to the target network PoS.
  • the MAC address of the terminal in the target network needs to be carried in the form of IEEE-defined 48 bits.
  • the target network PoS performs handover preparation, and stores related information of the terminal, establishes a mapping table of the terminal MAC address and the original service network PoS, and then sends an MIH_HO_Commit response message to the service network PoS, agrees to the terminal selection, and prepares for the handover. , for data buffering.
  • the service network PoS sends a MIH_HO_Commit response message to the terminal, agrees to the terminal selection, and prepares for the handover, and performs data buffering.
  • the target network PoS searches for the mapping table established in step S403 according to the MAC address used by the terminal to access the new network, and obtains the original service network PoS of the terminal. Send MIH_HO_ Complete request to it to inform the completion of the handover.
  • Embodiment 3 The service network is a 3GPP2 network, and the target network is a WLAN network.
  • the embodiment 3 describes the handover of the network to the terminal, and carries the terminal MAC address in the MIH-HO-Candidate-Query response message and the MIH_HO_Commit request message, so that the terminal is associated with the service network PoS. As shown in Figure 5, it mainly includes the following steps:
  • the service network PoS sends a MIH__HO_Candidate_Query request message to the terminal to trigger the handover.
  • the service network only has the MAC address information of the terminal in the 3GPP2 network, and the form is a variable-length IMSI type.
  • the terminal sends a MIH_HO_Candidate_Query response message to the serving network PoS, and agrees to switch.
  • the MAC address of the terminal in the target network needs to be carried in the form of a 48-bit MAC address defined by the IEEE.
  • the service network PoS sends a MIH_HO_Query_Resource request message to the target network PoS to query the status of the target network resource.
  • the target network PoS sends a MIH_HO_Query_Resource response message to the service network PoS, and informs its own resource status, so as to switch the decision.
  • the service network PoS sends a MIH_HO_Commit request message to the terminal, indicating that the requesting terminal submits the switch to the designated link.
  • the terminal sends an MIH_HO_Commit response message to the service network, indicating that the handover is to be performed.
  • the service network PoS should be ready to switch and perform data buffering.
  • the service network PoS sends a MIH_HO_Commit request message to the terminal, indicating that the terminal submits a designated link to the target network.
  • the MAC address of the terminal in the target network needs to be carried in the form of 48 bits defined by IEEE. MAC address.
  • the target network PoS performs handover preparation, and stores related information of the terminal, establishes a mapping table of the terminal MAC address and the original service network PoS, and then sends an MIH_HO_Commit response message to the J service network PoS, and agrees to the terminal selection. And prepare for the switch, data buffering.
  • the target network PoS searches the mapping table established in step S508 according to the MAC address used by the terminal to access the target network, obtains the original service network PoS of the terminal, and sends the MIH_HO to the terminal. Complete request, notifying the completion of the switch.
  • Example 4 service network is a 3GPP2 network, a WLAN network to a target network.
  • the network before the network triggers the handover, the network first queries the status information of the terminal on the target network, and then the MIH_HO_Commit request message carries the terminal MAC address, so that the terminal is associated with the service network PoS. As shown in Figure 6, the following steps are included:
  • S601 The service network is ready to trigger the handover, and the MAC of the terminal in the target network is obtained, and the message MH_Get_Status request is sent to the terminal for query.
  • the terminal sends an MIH_Get_Status response message to the serving network PoS in response to the query, where the field includes 48-bit MAC address information.
  • the service network PoS sends a MIH_HO_Query_Resource request message to the target network PoS to query the status of the target network resource.
  • Target Network The PoS sends a MIH_HO_Query_Resource response to the service network to inform itself of the resource status, so as to switch the decision.
  • the service network PoS sends a MIH_HO_Commit_Query request message to the terminal, triggering the terminal to switch.
  • the terminal sends an MIH_HO__Candidate_Query response message to the service network PoS. Agree to switch.
  • the service network PoS sends a MIH_HO_Commit request message to the terminal, indicating that the requesting terminal submits the switch to the designated link.
  • the terminal sends a MIH_HO_Commit response message to the network, indicating that the handover is about to be performed.
  • the service network PoS should be ready to switch and perform data buffering.
  • the service network PoS sends a MIH_HO_Commit request message to the terminal, indicating that the terminal submits a designated link to the target network.
  • the MAC address of the terminal in the target network needs to be carried in the form of an IEEE-defined 48-bit MAC address.
  • the target network PoS performs handover preparation, and stores related information of the terminal, establishes a mapping table of the terminal MAC address and its original service network PoS, and then sends an MIH_HO_Commit response message to the service network PoS, agrees to the terminal selection, and does Be prepared before switching, and perform data buffering.
  • the target network PoS searches for the mapping table established in step S610 according to the MAC address used by the terminal to access the target network, obtains the terminal service network PoS, and sends a MH_HO_Complete request to the terminal. The completion of the switch.
  • the service network PoS sends the buffered data to the target network PoS and sends a message MIH_HO_Complete response thereto.
  • Embodiment 5 The service network is a 3GPP2 network, and there are two target networks, namely a WLAN network (target network PoS1) and a 3GPP2 network (target network PoS2).
  • the solution adopted mainly includes the following steps:
  • the terminal sends a MIH_HO_Candidate_Query request message to the service network PoS, and triggers the handover.
  • the service network PoS sends the MIH_HO_Query_Resource request message to the two target networks: the target network PoS1 and the target network PoS2, respectively, to query the target network resource status.
  • the target network PoS1 and the target network PoS2 respectively send MIH_HO__Query_esource response to the service network to inform the resource status of the user, so as to switch the decision.
  • the service network PoS sends an MIH_HO_Candidate_Query response message to the terminal, indicating that the network side agrees to the handover request of the terminal.
  • the terminal sends a MIH_HO_Commit request message to the network, indicating that the handover is to be submitted to the selected link and the target network PoS.
  • the target network PoS1 is selected as the final handover target network PoS.
  • the service network PoS sends a MIH_HO_Commit request message to the selected target network PoS1.
  • the MAC address of the terminal in the WLAN network needs to be carried in the form of a 48-bit MAC address defined by the IEEE.
  • the target network PoS1 performs resource preparation, and stores related information of the terminal, establishes a mapping table of the terminal MAC address and the original service network PoS, and then sends an MIH__HO_Commit response message to the service network PoS, agrees to the terminal selection, and prepares for the handover. , for data buffering.
  • the service network PoS sends a MH-HO-Commit response message to the terminal, indicating that the network is ready for handover, and instructs the terminal to perform the handover operation.
  • the target network PoS1 searches for the mapping table established in step S707 according to the MAC address used by the terminal to access the new network, obtains the original service network PoS of the terminal, and sends the MIH_HO to the terminal. Complete request, notifying the completion of the switch.
  • Embodiment 6 System scheme for a terminal to switch between heterogeneous networks.
  • FIG. 8 it is a schematic structural diagram of a system for switching between terminals in a heterogeneous network according to Embodiment 6 of the present invention.
  • a service network and a target network for providing access services for the terminal 810 are provided, and a service is set in the service network.
  • the network PoS820 and the target network are provided with the target network PoS830, and also include:
  • the switching triggering unit 840 is configured to trigger a terminal switching operation, where the switching triggering unit 840 can be located at the terminal or on the network side;
  • a resource preparation unit 831 located in the target network PoS830, configured to prepare resources for the terminal 810;
  • a switching control unit 821 located in the service network PoS820, for controlling the terminal 810 to perform switching
  • the terminal and service network service point association information setting unit 832 is located in the target network PoS 830, and is used to set the terminal 810 to associate with the service network PoS820.
  • the terminal handover success message sending unit 833 is located at the target network PoS, and is configured to send a terminal handover success message to the service network PoS820 according to the terminal and the service network service point association information.
  • the system further includes:
  • the terminal identifier obtaining unit 822 is located at the service network PoS820 for acquiring the terminal identifier.
  • the terminal identifier sending unit 823 is located at the service network PoS820 and configured to send the terminal identifier to the target network PoS 830.
  • the target network PoS 830 may be multiple.
  • the terminal establishes an association relationship with the service network PoS in the inter-network handover process, and may associate the terminal that is switched to the target network with the service network PoS, so that when multiple terminals simultaneously switch, Find the service network PoS corresponding to each terminal, so as to ensure the smooth progress of the handover process.
  • the target network PoS may be set in the target network
  • the service network PoS is set in the service network to control the switching between the target network and the service network.
  • other functional network elements may also be set in the target network and the service network to implement the control terminal in the target network and The switching function between service networks will not be described here.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un système de transfert intercellulaire de terminal entre réseaux hétérogènes. Le procédé fait appel aux étapes suivantes: le réseau de services échange des informations avec le terminal et déclenche le transfert intercellulaire de terminal; le réseau d'objets réserve une ressource pour le terminal, et le réseau de services commande le terminal pour exécuter l'opération de transfert intercellulaire; lorsque le transfert intercellulaire est terminé, le réseau d'objets envoie le message de réussite de transfert intercellulaire du terminal au réseau de services en fonction des informations associées échangées entre le terminal et le réseau de services. Via ladite solution technique, le terminal établit la relation associée avec le réseau de services PoS au cours du processus de transfert intercellulaire entre différents réseaux, ainsi le terminal transféré vers le réseau d'objets peut être associé au réseau de services PoS, ensuite, lorsque le terminal commence le transfert intercellulaire, le réseau de services PoS correspondant à chaque terminal peut être trouvé, un flux de transfert intercellulaire réussit pouvant ainsi être assuré.
PCT/CN2007/001306 2006-04-20 2007-04-20 Procédé et système de transfert intercellulaire entre réseaux hétérogènes WO2007121671A1 (fr)

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CN101426202B (zh) * 2007-11-02 2012-04-18 华为技术有限公司 一种实现网络切换的方法、设备及系统
EP2926595A1 (fr) * 2012-11-27 2015-10-07 Sigram Schindler Beteiligungsgesellschaft mbH Procédé et système pour la prise en charge de l'approvisionnement d'une association de transferts intercellulaires proactifs
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WO2002043348A1 (fr) * 2000-11-24 2002-05-30 Columbitech Ab Procede de transfert entre des reseaux de communications heterogenes
CN1543109A (zh) * 2003-11-04 2004-11-03 中兴通讯股份有限公司 Phs到wcdma系统间切换执行方法
WO2005027559A1 (fr) * 2003-09-12 2005-03-24 Docomo Communications Laboratories Europe Gmbh Procede et appareil d'authentification rapide pour le transfert inter-domaines

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WO2002043348A1 (fr) * 2000-11-24 2002-05-30 Columbitech Ab Procede de transfert entre des reseaux de communications heterogenes
WO2005027559A1 (fr) * 2003-09-12 2005-03-24 Docomo Communications Laboratories Europe Gmbh Procede et appareil d'authentification rapide pour le transfert inter-domaines
CN1543109A (zh) * 2003-11-04 2004-11-03 中兴通讯股份有限公司 Phs到wcdma系统间切换执行方法

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