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WO2010108359A1 - Procédé et système de mise en oeuvre de transfert de service cs dans le mode d'accès au réseau eps - Google Patents

Procédé et système de mise en oeuvre de transfert de service cs dans le mode d'accès au réseau eps Download PDF

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Publication number
WO2010108359A1
WO2010108359A1 PCT/CN2009/074046 CN2009074046W WO2010108359A1 WO 2010108359 A1 WO2010108359 A1 WO 2010108359A1 CN 2009074046 W CN2009074046 W CN 2009074046W WO 2010108359 A1 WO2010108359 A1 WO 2010108359A1
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Prior art keywords
handover
iwf
msc
handover request
destination
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English (en)
Chinese (zh)
Inventor
陶全军
郝振武
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ZTE Corp
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ZTE Corp
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    • 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
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for implementing CS service switching in an EPS network access mode. Background technique
  • 3GPP 3rd Generation Partnership Project
  • PS Packet Switched Core
  • UTRAN Universal Mobile Telecommunication System Radio Access Network
  • EPC evolved PS Core
  • E-UTRAN Evolved UTRAN, Evolved UTRAN
  • GERAN GSM EDGE radio access network
  • GSM Global System for Mobile Communications
  • EDGE Enhanced Data Rate for GSM Evolution
  • UTRAN UTRAN
  • WLAN Wireless Local Area Network
  • EPS evolved Packet System
  • FIG. 1 is a network architecture diagram of a circuit (Chip Switched) (CS) service implemented by a terminal in an EPS network access mode.
  • CS Chip Switched
  • the description of each entity in FIG. 1 is as follows: User Equipment (UE) ) 101.
  • UE User Equipment
  • E-UTRAN 102 An evolved radio access network that provides higher uplink and downlink rates, lower transmission delays, and more reliable wireless transmission.
  • the network element included in the E-UTRAN is an eNodeB (Evolved NodeB), which provides radio resources for terminal access.
  • eNodeB evolved NodeB
  • the Serving Gateway (S-GW) 104 is a user plane entity responsible for user plane data routing processing.
  • a packet data network gateway (PDN GW or P-GW) 105 is responsible for the gateway function of the UE to access the PDN (Packet Data Network).
  • PDN GW or P-GW Packet Data Network
  • the P-GW and the S-GW may be combined in one physical entity.
  • Mobility Management Entity (MME) 103 is a control plane entity, a server that temporarily stores user data, and is responsible for managing and storing UE context (such as UE/user identity, mobility management state, user security parameters, etc.)
  • UE context such as UE/user identity, mobility management state, user security parameters, etc.
  • a temporary identifier is assigned to the user, and the user is responsible for authenticating the user when the UE is camped on the tracking area or the network.
  • MSC Mobile Switching Center
  • VLR Visitor Location Register
  • MSC/VLR may also be a new functional entity MSC Server in the R4 phase and thereafter, and is uniformly represented by the MSC/VLR in the present invention.
  • Interworking Function (IWF) 106 which simulates the MSC/VLR as a BSC (Base Station Controller) / RNC (Radio Network Controller), and provides an A/IU-CS interface.
  • the conversion of the IP signaling message received from the UE into an A/IU-CS interface message is sent to the MSC/VLR, and the conversion and transmission in the opposite direction are completed.
  • the IP signaling channel carried on the EPS network interacts with the IWF and the MSC/VLR to perform registration, location update, and voice call interaction, thereby completing the establishment process of the bearer and the call setup.
  • the MME When the UE needs to switch from the EPS network to the UMTS (Universal Mobile Telecommunications System)/GSM network, when the MME receives the handover request, the MME needs to send a handover request message to the current IWF of the UE for the voice service, thereby The IWF sends a handover request message to the MSC/VLR that controls the call, and the MME that the UE is currently located needs to be able to know the IWF where the UE is currently located.
  • UMTS Universal Mobile Telecommunications System
  • PCRF Policy Charging Rule Function
  • HSS Home Subscriber Server
  • FIG. 1 The MSC/VLR in the CS domain belongs to the CS domain network element, and the user passes the CS domain.
  • CS services such as voice calls can be made with users in the network or other networks (such as fixed telephone networks and other mobile networks).
  • the EPS system itself does not provide and control CS services such as voice calls, and can only provide Internet Protocol (IP) data bearer.
  • IP Internet Protocol
  • a UE implements voice and other CS services in the EPS access mode. It is implemented by the circuit domain control.
  • the interaction signaling between the UE and the MSC/VLR is transmitted through the IP signaling channel carried on the EPS network to perform an interaction process such as location update and call signaling.
  • the voice media stream is delivered through an IP user plane channel carried on the EPS network.
  • the IWF in Fig. 1 may be a network element having any variation of the corresponding function, and the IWF representative is uniformly used in the present invention.
  • FIG. 2 is a schematic diagram of a user switching from an EPS access network to a CS domain network during a call.
  • the user equipment (UE) 201 is originally connected to the MSC 208 through the EPS access network, and carries the bearer path before handover as shown in FIG. 2, and then the E-UTRAN is based on the user's current status due to the change of the radio network quality of the EPS network or due to the UE's movement.
  • the radio quality report determines to switch to the CS domain.
  • the language of the UE bears the bearer path after the handover in FIG. 2 .
  • the UTRAN 203 is a global mobile communication system radio access network, which includes a CS domain network base station and a base station management system
  • the Target MSC 209 is a mobile switching server that switches the destination service area.
  • Figure 3 shows the technical signaling flow of the existing voice service switching from the EPS access network to the CS domain access network.
  • the UE sends a wireless signal measurement report to the E-UTRAN.
  • the E-UTRAN determines to initiate the handover according to the measurement report, and the E-UTRAN sends a handover request to the MME, where the message includes the handover target cell.
  • the MME receives the handover request, selects an IWF according to the target cell, and forwards the handover request to the IWF.
  • the IWF simulates the RNC, and converts the message into an A/IU-CS interface message, and sends a handover request to the legacy CS domain MSC, where the message carries the target cell information;
  • the MSC receives the handover request, and matches the destination RNC or the MSC in the statically configured local cell or the neighbor cell list according to the destination location area in the handover request.
  • the Target MSC is selected, and the target Target MSC is selected.
  • Send a handover request, destination Target MSC If the handover is accepted, the radio resource is reserved, and the ground circuit is allocated, and the handover response message is returned to the MSC after success;
  • the MSC After receiving the handover response message, the MSC sends a handover command to the IWF to notify the UE to perform the handover.
  • the IWF After receiving the handover command, the IWF converts the content of the A/IU-CS interface message into a forward handover request response message between the IWF and the MME, and sends the response message to the MME.
  • the MME receives the handover response message, and notifies the E-UTRAN to perform handover;
  • the UE performs handover detection and handover to the Target MSC, and the handover is completed, and the Target MSC returns the handover completion to the MSC.
  • the MSC After receiving the handover complete message, the MSC notifies the IWF to clear the resource, and sends a clear command.
  • the IWF receives the clear command, sends a handover complete message to the MME, and clears the IWF resource. After receiving the handover, the MME clears the EPS network resource.
  • the IWF resource is cleared, and the clear completion message is sent to the MSC.
  • the IWF may be distributed in the home network as shown in FIG. 4 .
  • the IWF and the MSC are both in the home network.
  • the MSC receives the destination location cell in the handover request message as the visited cell, and the MSC of the home location may be unknown to the cell, and the destination device cannot be found, resulting in the handover failure.
  • the technical problem to be solved by the present invention is to provide a method and system for implementing CS service switching in an EPS network access mode to ensure successful switching of the CS service in the EPS network access mode.
  • the present invention provides a method for implementing circuit domain service switching in an evolved packet domain system network access mode, in which a mobility management entity MME in a system based on the method is configured with an adjacent cell index and A list of corresponding MSC address numbers, the method includes: The base station sends a handover request to the mobility management entity MME, where the handover request carries a target cell index;
  • the IWF Receiving, by the MME, the handover request, and sending a handover request to the Internet gateway IWF; the IWF receiving the handover request, and acquiring, from the MME, a destination mobile switching center, that is, a destination MSC address number corresponding to the target cell index;
  • the acquiring manner is any one of the following:
  • the MME sends a handover request message to the IWF, where the handover request and the destination MSC address number are carried, and the IWF receives the handover request message to obtain the destination MSC address number;
  • the IWF sends a request for requesting the destination MSC address number to the MME, the MME returns the destination MSC address number to the IWF, and the IWF obtains the destination MSC address number.
  • the IWF initiates a handover to the destination MSC by using any one of the following manners:
  • the IWF configures a cell list, and the list is consistent with the cell list in the source MSC. After receiving the handover message, the IWF determines whether the target cell is a cell in the list, and if yes, initiates a handover to the destination MSC by using the source MSC. Obtaining the destination MSC address number from the MME, and sending a handover request directly to the destination MSC through the interoffice interface; or
  • the IWF sends a handover request to the source MSC, where the destination MSC address number is carried; the source MSC sends a handover request to the destination MSC according to the destination MSC address number; or
  • the IWF sends a handover request to the destination MSC directly through the interoffice interface according to the MSC address number.
  • the present invention provides a system for implementing circuit domain service switching in an evolved packet domain system network access mode, where the system includes a mobility management entity MME and an Internet gateway IWF, where The MME is configured to save the neighbor cell index and the corresponding MSC address number list, and further configured to receive a handover request that carries the target cell index sent by the base station, and query the corresponding destination MSC address according to the target cell index in the handover request. a number, further configured to send a handover request to the IWF and the destination MSC address number;
  • the IWF is configured to receive a handover request sent by the MME and the destination MSC address number; and is further configured to initiate a handover to the destination mobile switching center MSC, so that the destination MSC performs a handover operation.
  • the system of the present invention may include a base station, a mobility management entity MME, an Internet gateway IWF, and a destination mobile switching center, that is, a destination MSC, where
  • the base station is configured to send a handover request to the MME, where the destination cell index is carried; the MME is configured to save a neighbor cell index and a corresponding MSC address number list; and set to receive the handover request sent by the base station, and according to Determining, by the target cell index in the handover request, a destination MSC address number; and sending the handover request and the destination MSC address number to the IWF;
  • the IWF is configured to receive a handover request sent by the IWF and the destination MSC address number; and further configured to initiate a handover to the destination MSC;
  • the destination MSC is arranged to perform a handover operation.
  • the MME sends the handover request and the destination MSC address number to the IWF by using a handover request message.
  • the IWF is further configured to send a request for requesting the destination MSC address number to the MME; and the MME sends the destination MSC address number to the IWF by using a response message.
  • the system further includes a source MSC configured to save the cell and its matched MSC list, and further configured to receive a handover request sent by the IWF, query the corresponding destination MSC according to the target cell in the handover request, and The destination MSC sends a handover request;
  • the IWF is further configured to save a cell list, where the list is consistent with a list in the source MSC; after receiving the handover request, the IWF is further configured to determine whether the target cell is a cell in the list, and if yes, the IWF Also used to send a handover request to the source MSC, otherwise, the IWF is also set. To utilize the obtained destination MSC address number, a handover request is directly sent to the destination MSC through the interoffice interface.
  • the IWF sends a handover request directly to the destination MSC through the interoffice interface according to the target MSC address number.
  • system further includes a source MSC, and when the IWF initiates a handover to the destination MSC, the IWF is configured to send a handover request to the source MSC, where the destination MSC address number is carried;
  • the IWF further includes a base station function and a switching function module, where
  • the base station function is configured to receive a handover request sent by the MME, and configured to forward a handover request to the handover function module, where the media establishment information and the destination MSC address number are carried, and the handover function module is established.
  • the bearer is configured to receive the handover response forwarded by the handover function module after the destination MSC completes the handover; and is further configured to connect the bearer between the source MSC and the handover function module, and clear the EPS network connection with the evolved packet domain system. Voice hosting.
  • the switching function module is configured to receive the handover request sent by the base station function, and establish a bearer with the base station function module; set to initiate a handover to the destination MSC; and further configured to receive the destination MSC The handover response sent after the handover is completed and forwarded to the base station function module.
  • the method and the system of the present invention configure the neighboring cell index and its corresponding MSC address number list in the MME, and the IWF obtains the destination MSC address number from the MME, and switches to the destination MSC according to the destination MSC address number, so that When the handover of the CS service is implemented in the EPS network access mode, the MSC fails to switch to the destination cell, and the handover fails.
  • FIG. 1 is a network architecture diagram of a terminal of the prior art implementing a CS service in an EPS network access mode.
  • FIG. 2 is a schematic diagram of a user switching from an EPS access network to a CS domain network during a call.
  • FIG. 3 is a technical signaling for switching a voice service from an EPS access network to a CS domain access network. Process.
  • Figure 4 is a diagram of the IWF that may be distributed over the home network.
  • FIG. 5 is a schematic diagram of a system framework for implementing CS service switching according to the present invention.
  • FIG. 6 is a first embodiment of a method for implementing CS service handover according to the present invention, and a signaling flow initiated by the IWF.
  • FIG. 7 is a schematic diagram of a signaling flow of a second embodiment of a method for implementing CS service handover according to the present invention.
  • the IWF provides a destination MSC address number to a source MSC, and the source MSC initiates handover.
  • FIG. 8 is another schematic diagram of a system framework for implementing CS service switching according to the present invention, where the IWF includes two independent functional entities.
  • Figure 9 is a schematic diagram of the signaling flow of the third embodiment of the method for implementing CS service handover of the present invention in Figure 8.
  • FIG. 10 is a schematic flowchart of implementing CS service switching according to the present invention.
  • the mobility management entity MME in the system based on the method is statically configured with a neighbor cell index and its corresponding in the local database.
  • a list of MSC address numbers, the method includes:
  • Step 1001 The base station sends a handover request to the mobility management entity MME, where the handover request carries a target cell index.
  • Step 1002 The MME receives the handover request, and forwards the handover request to the Internet gateway IWF.
  • the destination MSC address number is queried by the MME according to the destination cell index in the handover request.
  • the manner in which the IWF obtains the destination MSC address number is any of the following:
  • Step 1004 The IWF initiates a handover to the destination MSC according to the obtained destination MSC address number.
  • the IWF initiates the handover to the destination MSC in any of the following manners: Mode 1: The IWF configures a cell list, and the list and the cell list in the source MSC (including the local cell list and the neighboring cell list) Consistently, after receiving the handover message, the IWF determines whether the target cell is a cell in the list, and if yes, initiates a handover to the destination MSC through the source MSC; otherwise, obtains the destination MSC address number from the MME, and passes the The inter-interface directly sends a handover request to the destination MSC.
  • Mode 1 The IWF configures a cell list, and the list and the cell list in the source MSC (including the local cell list and the neighboring cell list) Consistently, after receiving the handover message, the IWF determines whether the target cell is a cell in the list, and if yes, initiates a handover to the destination MSC through the source MSC; otherwise, obtains the destination MSC address number from the
  • the IWF initiates a handover to the destination MSC by using the source MSC: the IWF sends a handover request to the source MSC, where the destination MSC address number is carried; and the source MSC sends the destination MSC address number to the destination MSC according to the destination MSC address number. Send a handover request;
  • Manner 3 According to the handover policy configured by the operator, the IWF sends a handover request directly to the destination MSC according to the MSC address number through the inter-office interface.
  • the IWF By configuring the neighbor cell index and its corresponding MSC address number list in the MME, the IWF obtains the destination MSC address number from the MME as the switched service and the media anchor point, thereby overcoming the implementation of the CS in the EPS network access mode.
  • the MSC fails to switch to the destination cell and the handover fails. This ensures successful handover.
  • FIG. 5 is a system reference frame diagram of the embodiment.
  • the IWF adds an inter-office interface with the MSC.
  • the interface is a standard interface, and supports the MAP protocol and the interoffice. Signaling.
  • Figure 6 is a first embodiment of the method of the present invention.
  • the switched service and the media anchor point are moved to the IWF, and the IWF completes the handover.
  • the MME is configured with the neighbor cell index and its corresponding MSC address number list.
  • the methods of switching include:
  • the UE initiates a measurement report.
  • the E-UTRAN initiates a handover request to the MME according to the measurement report, including the target cell. Identification, source cell identity, and current bearer service type;
  • the MME receives the handover request, and determines whether the voice service is based on the target cell identifier and the current service bearer. If yes, the MME is in the neighboring office MSC Server address number list associated with the neighboring cell of the MME according to the destination cell in the message. Obtaining the MSC Server address number of the destination cell service, and sending a forward handover request to the IWF, where the message includes the destination MSC Server address number, the user identifier (calling number or IMSI), and the area identifier of the handover destination cell, such as the area code of each province and city.
  • the handover information obtained by the MME from the E-UTRAN includes information such as a target cell and a source cell.
  • the IWF sends a request for the destination MSC address number to the MME;
  • the MME returns a destination MSC address number
  • 603 is a description of the manner in which the IWF obtains the destination MSC address number by using the handover request message
  • 603a-603b is an alternative method of the 603 mode, that is, the manner in which the IWF obtains the destination MSC address number by sending the request message.
  • the IWF directly uses the destination MSC address number provided by the MME according to the handover policy, and sends a handover request to the destination MSC.
  • Step 604 can also be processed in the following manner:
  • the IWF configures the destination cell list, the list is consistent with the cell list and the neighboring cell list in the MSC it serves, the IWF receives the handover message, and the IWF determines that the target cell is in the configured cell list. It is considered that the prior art process is used, that is, the source MSC sends a handover request to the destination MSC; otherwise, the IWF directly sends the handover request to the destination MSC through the interoffice interface using the destination MSC address number provided by the MME.
  • the destination MSC agrees to accept the handover, allocates the air interface resource and the ground circuit, and returns a handover response, where the response message carries the assigned handover number and the wireless handover access information;
  • the IWF After receiving the handover response, the IWF forwards a bearer setup request to the handover office, and sends an interoffice address initial message (IAM) to the target MSC, and the called number is filled in the handover number.
  • IAM interoffice address initial message
  • the IWF sends a forward handover response message to the MME.
  • the MME notifies the UE to perform handover by using the E-UTRAN;
  • the UE performs handover detection and handover to the Target MSC, and the handover is completed. 612.
  • the handover target BSS sends a handover complete message to the Target MSC.
  • the Target MSC passes the handover complete message to the IWF, returns an inter-office response message (ANM) signaling to the IWF, and simultaneously connects the circuit domain bearer with the IWF;
  • NAM inter-office response message
  • the IWF After receiving the handover complete message and the ANM message, the IWF performs an access side bearer switch. After the handover succeeds, the handover completion is sent to the MME.
  • the MME receives the handover complete message, and releases the EPS resource.
  • Figure 7 is a second embodiment of the method of the present invention.
  • the difference from the first embodiment is mainly that: ⁇ the destination MSC address number information obtained by the handover target cell is brought to the source MSC by using a handover message, and the source MSC according to the destination MSC address number. Information, initiates a handover to the destination MSC.
  • the IWF After receiving the handover message, the IWF sends a handover request to the source MSC served by the IWF, where the message carries the handover destination cell index and the destination MSC address number information.
  • the source MSC sends a handover request to the destination MSC according to the destination MSC address number provided in the message.
  • 706-715 is the same as 306-315, and will not be described here.
  • the IWF is a logical function body, and includes two functional entities, namely, a Base Function (SUF) 806 and a Handover Function (HOF) 807.
  • a Base Function (SUF) 806
  • HAF Handover Function
  • the SUF base station function module is mainly an IWF function in the prior art, and is mainly responsible for the signaling and bearer conversion functions in the call setup process.
  • the base station function entity has the capability of switching media and forwarding handover process messages.
  • the HOF switching function module has an MSC switching function, which is mainly responsible for the IWF media switching function.
  • MSC Mobility Management Entity
  • FIG. 9 is a flowchart of a third embodiment of a method for implementing CS service switching based on the system shown in FIG. 8.
  • the IWF in this embodiment is a logical body, which includes two functions, SUF and HOF. Module, the process is basically the same as Figure 7, the main difference is that increase SUF and HOF The interaction between.
  • the SUF receives the handover request, and the SUF forwards the handover request to the HOF module, where the handover request carries the bearer setup request information and the destination MSC address number.
  • the HOF receives the SUF handover request, and establishes a bearer between the SUF and the SUF.
  • the HOF sends a handover request to the target target MSC according to the destination MSC address number in the handover request message.
  • the destination MSC agrees to accept the handover, allocates the air interface resource and the ground circuit, and returns a handover response, where the response message carries the assigned handover number and the wireless handover access information;
  • the HOF receives the handover response, and forwards to the SUF;
  • the HOF sends an inter-office bearer setup request to the Target MSC, an initial address message (IAM);
  • SUF receives the handover response, and notifies the UE to perform handover by using the EPS network;
  • the UE switches to the new circuit domain network, sends a handover complete message to the destination circuit domain network, and notifies the HOF that the Target MSC simultaneously connects the bearer connection with the HOF, and returns an answer message (ANM);
  • the HOF receives the handover completion, and sends a handover completion to the SUF.
  • the SUF After receiving the handover, the SUF connects the bearer between the source MSC and the HOF. After the success, the voice bearer is connected to the EPS network, and the handover is completed to the MME.
  • the MME receives the handover complete message, and releases the EPS resource.
  • the present invention further provides an implementation system, where the system includes a base station, a mobility management entity MME, an Internet gateway IWF, and a destination mobile switching center, that is, a destination MSC. among them,
  • the base station is configured to send a handover request to the MME, where the destination cell index is carried, where the MME is configured to save a neighbor cell index and a corresponding MSC address number list, and is further configured to receive a handover request sent by the base station. And performing, according to the destination cell index in the handover request, a destination MSC address number, and also sending a handover request to the IWF and the destination MSC Address number;
  • the IWF is configured to receive a handover request forwarded by the MME and the destination MSC address number, and is further configured to initiate a handover to the destination MSC.
  • the MME sends the handover request and the destination MSC address number to the IWF through a handover request message.
  • the IWF After the IWF receives the handover request, the IWF is configured to send a request for requesting the destination MSC address number to the MME; the MME sends the destination MSC address number to the IWF by using a response message.
  • the destination MSC is configured to perform a handover operation.
  • the IWF or the destination MSC mainly has the following differences: Corresponding to the first embodiment:
  • the system of the present invention has the following functions:
  • the system further includes a source MSC, configured to save the cell and its matched MSC list, and further configured to receive a handover request sent by the IWF, query the corresponding destination MSC according to the target cell in the handover request, and send a handover to the destination MSC.
  • a source MSC configured to save the cell and its matched MSC list, and further configured to receive a handover request sent by the IWF, query the corresponding destination MSC according to the target cell in the handover request, and send a handover to the destination MSC.
  • the IWF is further configured to save a cell list, where the list is consistent with a list in a source MSC that is served by the IWF; after receiving the handover request, the IWF is further configured to determine whether the target cell is a cell in the list, and if yes, The IWF is further configured to send a handover request to the source MSC. Otherwise, the IWF is further configured to use the obtained destination MSC address number to directly send a handover request to the destination MSC through the interoffice interface.
  • the system further includes a source MSC, where the IWF sends a handover request to the source MSC, where the IWF sends a handover request, where the source MSC carries the destination MSC address number;
  • the IWF includes a base station function and a handover function module, where the base station function is used to receive a handover request sent by the MME, and is further used to forward a handover request to the handover function module, where the bearer media is established.
  • the information and the destination MSC address number are further used to establish a bearer with the handover function module; the handover function module is configured to receive the handover request, and establish a bearer with the base station function module, And the method is further configured to: initiate a handover to the destination MSC; after the destination MSC completes the handover, the destination MSC is further configured to send a handover response to the handover function module; the handover function module is further configured to receive the handover response and forward the
  • the base station function module is configured to receive the handover response, and is further configured to connect a bearer between the source MSC and the handover function module, and clear a voice bearer connected to the EPS network.
  • the method and system of the present invention overcomes the requirement that the neighboring cell index and its corresponding MSC address number list are configured in the MME, and the IWF obtains the destination MSC address number from the MME as the switched service and the media anchor point.
  • the handover failure occurs because the MSC is unknown to the target cell, thereby ensuring successful handover.
  • the method and system of the present invention overcomes the requirement that the neighboring cell index and its corresponding MSC address number list are configured in the MME, and the IWF obtains the destination MSC address number from the MME as the switched service and the media anchor point.
  • the handover failure occurs because the MSC is unknown to the target cell, thereby ensuring successful handover.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé de mise en œuvre de transfert de service de domaine à commutation de circuits (CS) dans le mode d'accès au réseau de système de domaine à commutation de paquets évolué (EPS), dans lequel l'entité de gestion de mobilité (MME) du système qui met en œuvre le procédé est configurée avec l'indice de cellule voisine et la liste de numéros d'adresse de centre de commutation mobile (MSC) correspondants, le procédé comprenant les opérations suivantes : la station de base transmet une requête de transfert à l'entité de gestion de mobilité (MME), ladite requête de transfert transportant l'indice de cellule cible ; ladite MME reçoit ladite requête de transfert, et transmet la requête de transfert à la fonction d'interfonctionnement (IWF) ; ladite IWF reçoit ladite requête de transfert, et obtient le centre de commutation mobile cible, c'est-à-dire le numéro d'adresse de MSC cible qui correspond à l'indice de cellule cible ; ladite IWF déclenche le transfert vers le MSC cible sur la base du numéro d'adresse de MSC cible obtenu. Un transfert réussi du service CS dans le mode d'accès au réseau EPS est garanti par le procédé et le système de la présente invention.
PCT/CN2009/074046 2009-03-26 2009-09-18 Procédé et système de mise en oeuvre de transfert de service cs dans le mode d'accès au réseau eps Ceased WO2010108359A1 (fr)

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CN200910130012.5 2009-03-26
CN200910130012.5A CN101848516B (zh) 2009-03-26 2009-03-26 在eps网络接入方式下实现cs业务切换的方法及系统

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CN104170463B (zh) * 2014-04-09 2017-11-24 华为技术有限公司 邻区添加方法和装置
CN104507062B (zh) * 2014-12-15 2018-10-30 华为技术有限公司 一种业务交互的方法、装置及系统

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