WO2010135951A1 - 重定位及重定位过程中的资源预留、回退方法与装置 - Google Patents

重定位及重定位过程中的资源预留、回退方法与装置 Download PDF

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Publication number
WO2010135951A1
WO2010135951A1 PCT/CN2010/072578 CN2010072578W WO2010135951A1 WO 2010135951 A1 WO2010135951 A1 WO 2010135951A1 CN 2010072578 W CN2010072578 W CN 2010072578W WO 2010135951 A1 WO2010135951 A1 WO 2010135951A1
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WIPO (PCT)
Prior art keywords
access network
network controller
radio access
user terminal
resource
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PCT/CN2010/072578
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English (en)
French (fr)
Inventor
徐西宝
赵明鹤
黄河
Original Assignee
中兴通讯股份有限公司
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Publication of WO2010135951A1 publication Critical patent/WO2010135951A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point

Definitions

  • the present invention relates to a relocation technology in a mobile communication system, and in particular, to a relocation method and apparatus, a resource reservation method and apparatus in a relocation process, and a resource backoff method and apparatus in a relocation process.
  • Background technique
  • the location of the user terminal often changes while maintaining the service, and the access network wireless controller such as the radio network controller (RNC, Radio Network Controller) of the third generation (3G, 3rd Generation) mobile communication system
  • RNC Radio Network Controller
  • the base station controller (BSC, Base Station Controller) of the second generation (2G, 2nd Generation) mobile communication system determines that the signal coverage of the source cell where the user equipment (UE, User Equipment) is located is weak, the signal coverage is better.
  • the target cell performs handover.
  • intra-system relocation When the source cell and the target cell belong to the same type of radio access network, but do not belong to the same radio access network radio controller management, it is called intra-system relocation; if the source cell and the target cell belong to different radio accesses When the network type is used, it is called inter-system relocation.
  • the process of intra-system relocation and inter-system relocation is similar.
  • the basic idea is to first request the target cell to complete the relocation resource reservation through the core network (CN, Core Network), and then notify the UE to switch the radio resources. Since resource reservation and resource switching of the user terminal are performed serially in time, the sum of the time required for the above two processes is the time required for relocation.
  • the main purpose of the present invention is to provide a resource reservation and fallback method and apparatus in a relocation and relocation process, which can implement fast resource reservation, backoff, and relocation.
  • a resource reservation method in a relocation process including:
  • the target radio access network controller After receiving the radio resource request message sent by the source radio access network controller through the logical interface between the source radio access network controller and the target radio access network controller, the target radio access network controller is a user that needs to be relocated.
  • the terminal allocates and reserves the radio resource, and notifies the source radio access network controller of the radio resource response message through the logical interface;
  • the radio resource request message includes at least the target cell identifier information that the user terminal needs to relocate, the user The capability information, the identifier information, and the current service type information of the terminal.
  • the radio resource response message includes at least the radio resource information that the target radio access network controller reserves for the user terminal in the target cell.
  • the logical interface comprises an IUR interface or an IUR-G interface.
  • the radio resource response message further includes new identification information that is allocated by the target radio access network controller to the user terminal.
  • a method of relocating including:
  • the source radio access network controller receives a radio resource response message sent by the target radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller, and confirms that the target radio access network controller is
  • the user terminal reserves the resource, sends a relocation request message/handover request message to the core network, and simultaneously sends a handover command message to the user terminal to switch to the radio resource allocated by the target cell; the radio resource
  • the response message includes at least radio resource information reserved by the target radio access network controller for the user terminal in the target cell;
  • the target radio access network controller After receiving the relocation request message/handover request message sent by the core network, the target radio access network controller completes resource construction between the target radio access network controller and the core network. Standing.
  • the relocation request message/handover request message carries new identification information allocated by the target radio access network controller to the user terminal.
  • the resource establishment between the target radio access network controller and the core network is completed, specifically:
  • the target radio access network controller compares resources between the target radio access network controller and the core network with the target radio access network according to an international mobile subscriber identity of the user terminal or the new identifier.
  • the controller associates the radio resources reserved by the user terminal, and sends a relocation request acknowledgement message/handover request acknowledgement message to the core network.
  • the delay of sending the handover command message to the user terminal is not greater than the duration T, and the duration T is the source wireless connection.
  • a resource fallback method in a relocation process including:
  • the source radio access network controller Upon receiving the relocation preparation failure message, the source radio access network controller transmits a radio resource cancel message to the target radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller;
  • the resource cancellation message includes at least radio resource information allocated by the source radio access network controller to the user terminal in the source cell;
  • the target radio access network controller After receiving the radio resource cancel message from the source radio access network controller, the target radio access network controller releases the radio resource reserved for the user terminal, and commands the user terminal to switch to the source radio access network control. A radio resource allocated by the source cell to the user terminal.
  • the radio resource cancellation message further includes the target radio access network controller assigning a new identifier to the user terminal.
  • the logical interface comprises an IUR interface or an IUR-G interface.
  • a resource reservation device in a relocation process comprising:
  • a receiving unit configured to receive a radio resource request message sent by the source radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller;
  • the radio resource request message includes at least Decoding the target cell identifier information that the user terminal needs to relocate, the capability information, the identifier information, and the current service type information of the user terminal;
  • a resource allocation unit configured to allocate and reserve a radio resource for the user terminal that needs to be relocated after the receiving unit receives the radio resource request message
  • a notification unit configured to notify, by the logical interface, a radio resource response message to the source radio access network controller; the radio resource response message includes at least radio resource information reserved for the user terminal in the target cell.
  • the logical interface comprises an IUR interface or an IUR-G interface.
  • a relocating device comprising:
  • a first receiving unit configured to receive, by using a logical interface between the source radio access network controller and the target radio access network controller, a radio resource response message sent by the target radio access network controller;
  • the message includes at least the radio resource information that the target radio access network controller reserves for the user terminal in the target cell;
  • a confirming unit configured to confirm, according to the radio resource response message, whether the target radio access network controller reserves a resource for the user terminal, and triggers the sending unit;
  • a sending unit configured to send a relocation request message/handover request message to the core network, or simultaneously send a handover command message to the user terminal to switch to the radio resource allocated by the target cell;
  • a second receiving unit configured to receive a relocation request message/handover request message sent by the core network
  • a resource establishing unit configured to complete after receiving the relocation request message/handover request message
  • the resource between the target radio access network controller and the core network is established.
  • the relocation request message/handover request message carries new identification information allocated by the target radio access network controller to the user terminal.
  • the resource establishing unit according to the international mobile subscriber identity code or the new identifier of the user terminal, the resource between the target radio access network controller and the core network and the target radio access
  • the network controller associates the radio resources reserved by the user terminal, and sends a relocation request acknowledgement message/handover request acknowledgement message to the core network.
  • the delay that the sending unit sends the handover command message to the user terminal after the sending of the relocation request message/handover request message is not greater than the duration T, where the duration T is sent by the source radio access network controller.
  • a time interval between the relocation request message/handover request message and the relocation command message returned by the core network, and the source radio access network controller sending a handover command message to the user terminal to the target radio access The difference between the time intervals at which the network controller receives the handover complete message of the user terminal.
  • a resource fallback device in a relocation process including:
  • a first receiving unit configured to receive a relocation preparation failure message
  • a sending unit configured to send, by the receiving unit, the relocation preparation failure message to the target radio access network by using a logical interface between the source radio access network controller and the target radio access network controller
  • the controller sends a radio resource cancellation message.
  • the radio resource cancellation message includes at least radio resource information allocated by the source radio access network controller to the user terminal in the source cell.
  • a second receiving unit configured to receive a radio resource cancel message from the source radio access network controller, where the radio resource cancel message includes at least the radio resource information that the source radio access network controller allocates to the user terminal in the source cell
  • the radio resource cancel message further includes the target radio access network controller assigning a new identifier to the user terminal;
  • a releasing unit configured to release, after the receiving unit receives the wireless resource cancellation message And placing, by the target radio access network controller, a radio resource reserved for the user terminal, and a switching unit, configured to instruct the user terminal to switch to the source radio access network controller to allocate the user terminal in the source cell Wireless resources.
  • the logical interface comprises an IUR interface or an IUR-G interface.
  • the source radio access network controller When the user terminal needs to perform relocation, the source radio access network controller directly requests resource allocation from the target radio access network controller through the logical interface between the source radio access network controller and the target radio access network controller, and receives the resource. After the resource allocated by the target radio access network controller, the source radio access network controller sends a relocation request message/handover request message to the core network, and sends a handover command message to the user terminal after delaying for a certain period of time.
  • the process of resource allocation will be faster; likewise, the process of resource rollback is faster; and, the relocation request message/handover request message And the handover command message can be set to be sent at the same time or at intervals, ensuring that the source radio access network controller receives the handover completion message and the relocation command message are performed in parallel, and therefore, the time required for relocation of the present invention is short. For the user terminal with high mobile speed, the communication quality can also be guaranteed.
  • FIG. 1 is a flowchart of a resource reservation method in a relocation process according to the present invention
  • FIG. 2 is a flow chart of a relocation method of the present invention
  • FIG. 3 is a flowchart of a method for resource backoff in a relocation process of the present invention
  • FIG. 5 is a flowchart of Embodiment 2 of the entire relocation method of the present invention.
  • FIG. 6 is a schematic structural diagram of a resource reservation device in a relocation process of the present invention
  • FIG. 7 is a schematic structural diagram of a relocation device according to the present invention
  • FIG. 8 is a schematic structural diagram of a resource back-off device in a relocation process according to the present invention. detailed description
  • the basic idea of the present invention is: When confirming that the user terminal needs to perform relocation, the source radio access network controller directly requests resources from the target radio access network controller through its logical interface with the target radio access network controller. After the allocation, and after confirming that the target radio access network controller has allocated resources, the source radio access network controller sends a relocation request message/handover request message to the core network, and sends a handover command to the user terminal after delaying for a certain period of time. Message. Since the request for resource allocation is directly sent to the target radio access network controller, the process of resource allocation will be faster; and the relocation request message/handover request message and the handover command message can be set to be simultaneously or intermittently. Time transmission, the source radio access network controller receives the handover complete message and the relocation command message is performed in parallel, therefore, the time required for relocation of the present invention is short, and for the user terminal with higher mobile speed, Guarantee the quality of communication.
  • FIG. 1 is a flowchart of a resource reservation method in a relocation process according to the present invention.
  • the resource reservation method in the relocation process shown in FIG. 1 is applicable to a source radio access network controller side, as shown in FIG.
  • the resource reservation method in the relocation process of the present invention includes the following steps:
  • Step 101 When it is determined that the user terminal needs to be relocated, the source radio access network controller sends a radio resource request message to the target radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller.
  • the radio resource request message includes at least target cell identification information, capability information of the user terminal, identification information, and current service type information.
  • the format of the radio resource request message can be seen in Table 1: Field name value description
  • Service Type The type of service that requests wireless resources.
  • the format of the radio resource request message shown in Table 1 is an exemplary description, not a specific format for defining a radio resource request message.
  • the basic information carried in the radio resource request message is shown in Table 1.
  • the radio access network controller refers to an RNC or a 2G system in a 3G communication system.
  • the logical interface between the source radio access network controller and the target radio access network controller is an IUR interface or an IUR-G interface.
  • the core network to which the source radio access network controller and the target radio access network controller belong may be the same or different. .
  • Step 102 After receiving the radio resource request message, the target radio access network controller allocates and reserves radio resources for the user terminal to be relocated according to the service type requested by the user and the capability information of the user, and passes the source radio access network.
  • the logical interface between the controller and the target radio access network controller notifies the source radio access network controller of the radio resource response message.
  • the radio resource response message includes at least radio resource information reserved by the target radio access network controller for the user terminal in the target cell.
  • the radio resource response message is a response message of the radio resource request message, and may further include identifier information that the target radio access network controller allocates for the user terminal in the target cell.
  • the specific format of the radio resource response message can be seen in Table 2: Field name value description
  • UE identifies the IMSI of the UE or the SRNTI assigned by the system, etc.
  • the target radio access network controller is a UE in the target cell
  • the target radio access network controller is the UE radio resource in the target cell.
  • the format of the radio resource response message shown in Table 2 is an exemplary description, not a specific format for defining a radio resource response message.
  • the radio access network controller refers to an RNC in a 3G communication system or a BSC in a 2G system.
  • the logical interface includes an IUR interface or a UR-G interface.
  • step 102 the resource reservation can be realized by a separate step 102, and the step 101 is to make the technical solution of the present invention clearer.
  • the method disclosed in step 102 is applicable to the controller side of the target radio access network.
  • FIG. 2 is a flowchart of a relocation method according to the present invention. As shown in FIG. 2, the relocation method of the present invention includes the following steps:
  • Step 201 The source radio access network controller receives a radio resource response message sent by the target radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller, and confirms the target radio access network.
  • the controller reserves a resource for the user terminal, sends a relocation request message/handover request message to the core network, and simultaneously sends a handover command message to the user terminal to switch to the radio resource allocated by the target cell;
  • the radio resource response message includes at least radio resource information reserved by the target radio access network controller for the user terminal in the target cell.
  • the delay of sending the handover command message to the user terminal is not greater than the duration T, and the duration T is sent by the source radio access network controller.
  • Relocation request message/handover request message to the core network received a time interval of the returned relocation command message and a time when the source radio access network controller sends a handover command message to the user terminal to the target radio access network controller to receive a handover complete message of the user terminal The difference between the intervals.
  • the delay duration T of the present invention for transmitting the handover command message may be set according to actual system statistics or based on empirical values, or may be determined by an associated simulation system.
  • Step 202 After receiving the relocation request message/handover request message sent by the core network, the target radio access network controller completes resource establishment between the target radio access network controller and the core network.
  • the relocation request message/handover request message carries new identification information allocated by the target radio access network controller for the user terminal.
  • Complete the resource establishment between the target radio access network controller and the core network where specifically: the target radio access network controller according to the international mobile subscriber identity code of the user terminal or the new identifier
  • a resource between the target radio access network controller and the core network is associated with a radio resource reserved by the target radio access network controller for the user terminal, and sends a relocation request acknowledgement to the core network.
  • Message/Handover Request Acknowledgement message is associated with a radio resource reserved by the target radio access network controller for the user terminal.
  • the radio access network controller refers to an RNC in a 3G communication system or a BSC in a 2G system.
  • the logical interface includes an IUR interface or a UR-G interface.
  • FIG. 3 is a flowchart of a resource backoff method in a relocation process according to the present invention.
  • the resource backoff method in the relocation process of the present invention includes:
  • Step 301 When receiving the relocation preparation failure message sent by the core network, the source radio access network controller sends the radio to the target radio access network controller through a logical interface between the source radio access network controller and the target radio access network controller.
  • the resource cancel message includes a radio resource information that is allocated by the source radio access network controller to the user equipment in the source cell, and may further include the UE identifier and the UE new identifier information.
  • Table 3 Field name value description
  • the UE identifies the IMSI of the UE or the SRNTI allocated by the system, and the target radio access network controller is the UE in the target cell.
  • the source radio access network controller allocates radio resources to the UE in the source cell.
  • Radio Resource Cancel message shown in Table 3 is an example description, not a specific format for limiting wireless resource cancellation messages.
  • the radio access network controller refers to the RNC in the 3G communication system or the BSC in the 2G system.
  • the source radio access network controller and the target radio access network controller belong to the same core network, Can be different.
  • the logical interface between the source radio access network controller and the target radio access network controller is an IUR interface or an IUR-G interface.
  • Step 302 After receiving the radio resource cancellation message, the target radio access network controller releases the radio resource reserved for the user terminal. Moreover, after determining that the user terminal has completed the handover, the UE is sent a command to switch back to the source radio access network controller, requesting the UE to switch back to the radio resource allocated by the source radio access network controller for the UE.
  • Step 401 The UE successfully establishes a CS service in the cell 1 of the source RNC. After the UE moves, the source RNC (the RNC where the cell 1 is located) selects the target RNC according to the measurement report of the UE.
  • the cell 2 of the RNC is the target cell, and the source RNC passes the radio resource of the IUR interface.
  • the message requesting target RNC allocates relevant radio resources to the UE; the message carries the identifier of the target cell 2, and the message may also carry information such as the current service type and the UE identity of the UE.
  • the format of the radio resource request message of this example is shown in Table 4:
  • Step 402 After receiving the radio resource request message through the IUR interface, the target RNC allocates radio resource information to the UE in the cell 2, and allocates the radio resource information and the identifier of the UE to the UE through the radio resource response message.
  • Source RNC The format of the radio resource response message for this example is shown in Table 5:
  • Step 403 After receiving the radio resource response message of the target RNC, the source RNC determines that the target RNC allocates and reserves the radio resource, immediately initiates a relocation request message to the CN, and initiates a handover to the UE at the same time or after a certain delay.
  • the handover command message to the target cell carries the content of the radio resource information allocated to the UE in the cell 2 and the identifier allocated by the target RNC to the UE.
  • the handover command message is sent for a certain period of time, and the delay time is obtained according to empirical statistics.
  • the source RNC may not be greater than the source RNC to initiate a relocation request to the CN.
  • the time interval between the message to the relocation command message of the CN and the time interval between the time when the source RNC initiates the handover command message to the UE and the target RNC receives the handover complete message of the UE can also be configured as a fixed time interval according to other conventions, for example, the time interval is configured to be zero or other values.
  • Step 404 After receiving the relocation request message, the CN sends a relocation request message to the target RNC, where the message carries the new identifier allocated by the target RNC to the UE in step 402.
  • the target RNC After receiving the relocation request message of the CN, the target RNC completes the target.
  • the resource between the RNC and the CN is established, and according to the identifier allocated by the target RNC to the UE in step 402, the resource between the established target RNC and the CN is associated with the radio resource already allocated to the UE in step 402, and the CN is responded to.
  • Relocation request acknowledgement message after receiving the relocation request acknowledgement message of the target RNC controller, the CN sends a relocation command message to the source RNC.
  • the source RNC receives the relocation command message and performs step 405. If the source RNC does not receive the relocation command message within a certain time, or receives the relocation preparation failure message of the CN, step 408 is performed;
  • Step 405 After receiving the handover complete message of the UE, the target RNC responds to the CN with a relocation complete message.
  • Step 406 After receiving the relocation complete message of the target RNC, the CN initiates an IU release command message to the source RNC.
  • Step 407 After the source RNC receives the IU release command message of the CN, the UE releases the related resources of the UE, and the process ends.
  • Step 408 The source RNC sends a radio resource cancellation message through the IUR interface, where the message includes the radio resource information allocated by the source RNC for the UE, and may also include the content of the new identifier allocated by the target RNC for the UE.
  • the format of the wireless resource cancel message in this example is shown in Table 6: Field name value description
  • Step 409 After receiving the radio resource cancel message, the target RNC, after receiving the air interface handover complete message of the UE, instructs the UE to switch back to the source RNC, and notifies the UE that the source RNC allocates the radio resource to the UE, and then releases the target. All resource information reserved for this UE in the RNC. End of process
  • FIG. 5 is a flowchart of Embodiment 2 of the entire relocation method of the present invention. As shown in FIG. 5, it is assumed that the target radio access network controller first receives the air interface switching completion message of the UE in the relocation process, and then receives the CN. Relocate the request message. This example includes the following steps:
  • Step 501 The UE successfully establishes the CS service in the cell 1 of the source RNC (the RNC where the cell 1 is located). After the UE moves, the source RNC selects the cell 2 of the target BSC as the target cell according to the measurement report of the UE, and the source RNC passes the IUR.
  • the radio resource request message of the -G interface requests the target BSC (the BSC where the cell 2 is located) to allocate the relevant radio resource to the UE; the message carries the identifier of the target cell 2, the capability and service type of the UE, and the like, Information such as the identity of the UE.
  • the format of the radio resource request message in this example is shown in Table 7:
  • Step 502 After the target BSC receives the radio resource request message through the IUR-G interface, The cell 2 allocates radio resource information to the UE, and sends the radio resource information and the identifier of the UE to the source RNC through the radio resource response message.
  • the format of the radio resource response message in this example is shown in Table 8:
  • Step 503 The source RNC immediately sends a handover request message to the CN after receiving the radio resource response message of the target BSC, and the handover request message may include a new identifier allocated by the target BSC for the UE, and initiates to the UE at the same time or after a certain delay.
  • the handover command message is switched to the 2G system (Cell 2), and the message carries content such as radio resource information allocated to the UE in the target BSC cell 2.
  • the handover command message is sent for a certain period of time, and the delay time is obtained according to the empirical statistics.
  • the time interval between the source RNC and the CN re-locating command to the CN is not greater than the source RNC.
  • the absolute time difference of the time interval in which the UE initiates the handover command message to the target BSC receiving the handover complete message of the UE can also be configured as a fixed time interval according to other conventions, for example, the time interval is configured to zero or other values.
  • Step 504 After receiving the handover complete message of the UE, the target BSC waits for the handover request message of the CN. After receiving the handover request message sent by the source RNC, the CN sends a handover request message to the target BSC, where the message carries the target BSC for the UE.
  • the resource is associated with the radio resource that has been allocated to the UE in step 502, and responds to the CN with a handover request acknowledgement message and a handover complete message; the CN receives the handover request confirmation and cut of the target BSC.
  • the relocation command message and the IU release command message are sent to the source RNC.
  • the relocation complete message and the IU release command message the source RNC completes the release of the resource, and the process ends.
  • step 505 is performed;
  • Step 505 The source RNC sends a radio resource cancel message through the IUR-G interface, where the message includes the radio resource information allocated by the source RNC for the UE, and may also include the new identifier that the target BSC allocates for the UE.
  • the format of the wireless resource cancel message in this example is shown in Table 9:
  • Step 506 After receiving the radio resource cancellation message, the target BSC instructs the UE to switch back to the radio resource allocated by the source RNC for the UE, and then release all the resource information reserved for the UE in the target BSC.
  • FIG. 6 is a schematic structural diagram of a resource reservation apparatus in a relocation process according to the present invention.
  • the resource reservation apparatus in the relocation process of the present invention includes a receiving unit 60, a resource allocation unit 61, and a notification unit 62, where The receiving unit 60 is configured to receive a radio resource request message sent by the source radio access network controller through the logical interface, where the radio resource request message includes at least the target cell identifier information that the user terminal needs to relocate, and the capability of the user terminal.
  • the resource allocation unit 61 is configured to allocate and reserve radio resources for the user terminal that needs to be relocated after the receiving unit 60 receives the radio resource request message; Notifying, by the logical interface, a radio resource response message to the source radio access network controller; the radio resource response message at least including the user terminal reserved in the target cell Wireless resource information.
  • the resource reservation device in the relocation process shown in FIG. 6 is designed to implement the resource reservation method in the relocation process shown in FIG. 1, and the resources in the relocation process shown in FIG.
  • the implementation functions of the processing units in the reservation device can be understood by referring to the related descriptions in the methods shown in FIGS. 1, 4, and 5.
  • the functions of the units in the resource reservation device in the relocation process shown in Fig. 6 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • FIG. 7 is a schematic structural diagram of a relocation device according to the present invention.
  • the relocation device of the present invention includes a first receiving unit 70, a confirming unit 71, a transmitting unit 72, a second receiving unit 73, and a resource establishing unit 74.
  • the first receiving unit 70 is configured to receive, by using a logical interface between the source radio access network controller and the target radio access network controller, a radio resource response message sent by the target radio access network controller;
  • the resource response message includes at least the radio resource information reserved by the target radio access network controller for the user terminal in the target cell;
  • the confirming unit 71 is configured to confirm the target radio access network control according to the radio resource response message Whether the device reserves resources for the user terminal, and triggers the sending unit 72;
  • the sending unit 72 is configured to send a relocation request message/handover request message to the core network, and simultaneously or later send a handover to the target cell to the user terminal.
  • the second receiving unit 73 is configured to receive the core network to send Relocation Request message / handover request message; for resource establishment unit 74 after receiving the relocation request message / handover request message, to complete the target radio access network resources between the controller and the core network established.
  • FIG. 7 is designed to implement the relocating method shown in FIG. 2.
  • the implementation functions of the processing units in the relocating device shown in FIG. 7 can be referred to FIG. 2 and FIG. 4. Understand the relevant description in the method shown in FIG. 5.
  • the functions of the units in the re-setting device shown in Fig. 7 can be realized by a program running on the processor, or can be realized by a specific logic circuit.
  • FIG. 8 is a schematic structural diagram of a resource back-off device in a relocation process according to the present invention. As shown in FIG. 8, the first receiving unit 80, the transmitting unit 81, and the second receiving unit 82 of the resource back-off device in the relocation process of the present invention are shown in FIG.
  • the first receiving unit 80 is configured to receive a relocation preparation failure message; and the sending unit 81 is configured to: after the first receiving unit 80 receives the relocation preparation failure message, And a logical interface between the network access controller and the target radio access network controller sends a radio resource cancel message to the target radio access network controller; the radio resource cancel message includes at least the source radio access network controller Radio resource information allocated to the user terminal in the source cell.
  • the radio resource cancellation message further includes the target radio access network controller assigning a new identity to the user terminal.
  • the second receiving unit 82 is configured to receive a radio resource cancel message from the source radio access network controller, where the radio resource cancel message includes at least the radio resource information that the source radio access network controller allocates to the user terminal in the source cell.
  • the radio resource cancel message further includes: the target radio access network controller assigns a new identifier to the user terminal; and the releasing unit 83 is configured to release the radio resource cancel message after the receiving unit receives the The radio resource reserved by the target radio access network controller for the user terminal; the switching unit 84 is configured to instruct the user terminal to switch to the radio resource allocated by the source radio access network controller to the user terminal in the source cell.
  • the implementation functions of the processing units in the resource back-off device in the relocation process shown in FIG. 8 can refer to the resource back-off method in the relocation process and the methods shown in FIG. 3, FIG. 4, and FIG. Understand the relevant description in the method.
  • the functions of the units in the resource fallback device in the relocation process shown in Fig. 8 can be realized by a program running on the processor, or can be realized by a specific logic circuit.

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Description

重定位及重定位过程中的资源预留、 回退方法与装置 技术领域
本发明涉及移动通信系统中的重定位技术, 尤其涉及一种重定位方法 与装置, 重定位过程中的资源预留方法与装置, 以及重定位过程中的资源 回退方法与装置。 背景技术
在移动通信系统中, 用户终端在保持业务的情况下位置会经常改变, 接入网无线控制器如第三代(3G, 3rd Generation )移动通信系统的无线网 络控制器(RNC, Radio Network Controller, 第二代(2G, 2nd Generation ) 移动通信系统的基站控制器( BSC , Base Station Controller )判决用户终端 ( UE, User Equipment )所在的源小区的信号覆盖变弱时, 会选择信号覆盖 更好的目标小区进行切换。
当源小区和目标小区属于同一种无线接入网类型, 但是不属于同一个 无线接入网无线控制器管理时, 称之为系统内重定位; 如果源小区和目标 小区属于不同的无线接入网类型时, 则称之为系统间重定位。
系统内重定位和系统间重定位的流程是相似的, 其根本思想是先通过 核心网 ( CN, Core Network )要求目标小区完成重定位资源的预留, 然后 通知 UE进行无线资源的切换。由于资源预留及用户终端的资源切换在时间 上是串行进行的, 因此上述两过程所需的时间之和就是重定位所需时间。
UE的重定位过程发生在 UE的移动过程中时, 如果移动速度较快, 源 小区的无线资源信号迅速恶化, 因此重定位的时间越长, UE的重定位失败 的概率会就会越高。 目前重定位所需时间相对较长, 对于移动速度较高的 用户终端而言, 重定位失败的概率较高, 导致移动用户终端的掉话率较高。 发明内容
有鉴于此, 本发明的主要目的在于提供一种重定位及重定位过程中的 资源预留、 回退方法与装置, 能实现快速的资源预留、 回退及重定位。
为达到上述目的, 本发明的技术方案是这样实现的:
一种重定位过程中的资源预留方法, 包括:
接收源无线接入网控制器通过源无线接入网控制器与目标无线接入网 控制器之间的逻辑接口发送的无线资源请求消息之后, 目标无线接入网控 制器为需重定位的用户终端分配并预留无线资源, 并通过逻辑接口将无线 资源响应消息通知源无线接入网控制器; 所述无线资源请求消息至少包括 所述用户终端需重定位的目标小区标识信息, 所述用户终端的能力信息、 标识信息以及当前的业务类型信息; 所述无线资源响应消息至少包括所述 目标无线接入网控制器为所述用户终端在目标小区预留的无线资源信息。
优选地, 所述逻辑接口包括 IUR接口或 IUR-G接口。
优选地, 所述无线资源响应消息还包括目标无线接入网控制器为所述 用户终端分配的新标识信息。
一种重定位方法, 包括:
源无线接入网控制器通过其与目标无线接入网控制器之间的逻辑接口 接收所述目标无线接入网控制器发送的无线资源响应消息, 确认所述目标 无线接入网控制器为用户终端预留了资源, 向核心网发送重定位要求消息 / 切换要求消息, 同时或之后向所述用户终端发送切换到所述目标小区所分 配的无线资源上的切换命令消息; 所述无线资源响应消息至少包括所述目 标无线接入网控制器为所述用户终端在目标小区预留的无线资源信息; 以 及
所述目标无线接入网控制器接收到核心网发送的重定位请求消息 /切换 请求消息后, 完成所述目标无线接入网控制器与所述核心网之间的资源建 立。
优选地, 所述重定位要求消息 /切换要求消息中携带有目标无线接入网 控制器为所述用户终端分配的新标识信息。
优选地, 完成所述目标无线接入网控制器与所述核心网之间的资源建 立, 具体为:
目标无线接入网控制器根据所述用户终端的国际移动用户识别码或所 述新标识将所述目标无线接入网控制器与所述核心网之间的资源与所述目 标无线接入网控制器为所述用户终端所预留的无线资源关联, 并向所述核 心网发送重定位请求确认消息 /切换请求确认消息。
优选地, 所述源无线接入网控制器发送所述重定位要求消息 /切换要求 消息之后向所述用户终端发送切换命令消息的延迟不大于时长 T,所述时长 T 为所述源无线接入网控制器发送重定位要求消息 /切换要求消息至接收到 所述核心网返回的重定位命令消息的时间间隔与所述源无线接入网控制器 向所述用户终端发送切换命令消息至所述目标无线接入网控制器接收到所 述用户终端的切换完成消息的时间间隔之差值。
一种重定位过程中的资源回退方法, 包括:
接收到重定位准备失败消息时, 源无线接入网控制器通过其与目标无 线接入网控制器之间的逻辑接口向所述目标无线接入网控制器发送无线资 源取消消息; 所述无线资源取消消息至少包括所述源无线接入网控制器在 源小区为用户终端分配的无线资源信息; 以及
接收到来自源无线接入网控制器的无线资源取消消息后, 所述目标无 线接入网控制器释放为用户终端预留的无线资源, 并命令所述用户终端切 换到源无线接入网控制器在源小区为所述用户终端分配的无线资源。
优选地, 所述无线资源取消消息还包括所述目标无线接入网控制器为 所述用户终端分配新标识。 优选地, 所述逻辑接口包括 IUR接口或 IUR-G接口。
一种重定位过程中的资源预留装置, 包括:
接收单元, 用于接收源无线接入网控制器通过源无线接入网控制器与 目标无线接入网控制器之间的逻辑接口发送的无线资源请求消息; 所述无 线资源请求消息至少包括所述用户终端需重定位的目标小区标识信息, 所 述用户终端的能力信息、 标识信息以及当前的业务类型信息;
资源分配单元, 用于在所述接收单元接收到所述无线资源请求消息后, 为需重定位的用户终端分配并预留无线资源; 以及
通知单元, 用于通过所述逻辑接口将无线资源响应消息通知源无线接 入网控制器; 所述无线资源响应消息至少包括为所述用户终端在目标小区 预留的无线资源信息。
优选地, 所述逻辑接口包括 IUR接口或 IUR-G接口。
一种重定位装置, 包括:
第一接收单元, 用于通过源无线接入网控制器与目标无线接入网控制 器之间的逻辑接口接收所述目标无线接入网控制器发送的无线资源响应消 息; 所述无线资源响应消息至少包括所述目标无线接入网控制器为所述用 户终端在目标小区预留的无线资源信息;
确认单元, 用于根据所述无线资源响应消息确认所述目标无线接入网 控制器是否为用户终端预留了资源, 是时触发发送单元;
发送单元, 用于向核心网发送重定位要求消息 /切换要求消息, 同时或 之后向所述用户终端发送切换到所述目标小区所分配的无线资源上的切换 命令消息;
第二接收单元, 用于接收到核心网发送的重定位请求消息 /切换请求消 息; 以及
资源建立单元, 用于在接收到重定位请求消息 /切换请求消息后, 完成 所述目标无线接入网控制器与所述核心网之间的资源建立。
优选地, 所述重定位要求消息 /切换要求消息中携带有目标无线接入网 控制器为所述用户终端分配的新标识信息。
优选地, 所述资源建立单元根据所述用户终端的国际移动用户识别码 或所述新标识将所述目标无线接入网控制器与所述核心网之间的资源与所 述目标无线接入网控制器为所述用户终端所预留的无线资源关联, 并向所 述核心网发送重定位请求确认消息 /切换请求确认消息。
优选地, 所述发送单元发送所述重定位要求消息 /切换要求消息之后向 所述用户终端发送切换命令消息的延迟不大于时长 T, 所述时长 T为所述 源无线接入网控制器发送重定位要求消息 /切换要求消息至接收到所述核心 网返回的重定位命令消息的时间间隔与所述源无线接入网控制器向所述用 户终端发送切换命令消息至所述目标无线接入网控制器接收到所述用户终 端的切换完成消息的时间间隔之差值。
一种重定位过程中的资源回退装置, 包括:
第一接收单元, 用于接收重定位准备失败消息;
发送单元, 用于在所述接收单元接收到所述重定位准备失败消息后, 通过源无线接入网控制器与目标无线接入网控制器之间的逻辑接口向所述 目标无线接入网控制器发送无线资源取消消息; 所述无线资源取消消息至 少包括所述源无线接入网控制器在源小区为用户终端分配的无线资源信 息。
第二接收单元, 用于接收来自源无线接入网控制器的无线资源取消消 息; 所述无线资源取消消息至少包括所述源无线接入网控制器在源小区为 用户终端分配的无线资源信息; 所述无线资源取消消息还包括所述目标无 线接入网控制器为所述用户终端分配新标识;
释放单元, 用于在所述接收单元接收到所述无线资源取消消息后, 释 放所述目标无线接入网控制器为所述用户终端预留的无线资源; 以及 切换单元, 用于命令所述用户终端切换到源无线接入网控制器在源小 区为所述用户终端分配的无线资源。
优选地, 所述逻辑接口包括 IUR接口或 IUR-G接口。
本发明在确认用户终端需进行重定位时, 源无线接入网控制器通过其 与目标无线接入网控制器之间的逻辑接口直接向目标无线接入网控制器请 求资源分配, 并在接收到目标无线接入网控制器分配的资源后, 源无线接 入网控制器再向核心网发送重定位要求消息 /切换要求消息, 同时或延迟一 定时长再向用户终端发送切换命令消息。 由于资源分配的请求是直接发送 目标无线接入网控制器的, 因此, 资源分配的过程将会更快捷; 同样的, 资源回退的过程也更迅捷; 并且, 重定位要求消息 /切换要求消息及切换命 令消息可以设定为同时或间隔一段时间发送, 保证源无线接入网控制器接 收到切换完成消息及重定位命令消息是并行进行的, 因此, 本发明重定位 所需的时间较短, 对于移动速度较高的用户终端而言, 也能保证通信质量。 附图说明
图 1为本发明一种重定位过程中的资源预留方法的流程图;
图 2为本发明重定位方法的流程图;
图 3为本发明重定位过程中资源回退方法的流程图;
图 4为本发明整个重定位方法实施例一的流程图;
图 5为本发明整个重定位方法实施例二的流程图
图 6为本发明重定位过程中的资源预留装置的组成结构示意图; 图 7为本发明重定位装置的组成结构示意图;
图 8为本发明重定位过程中资源回退装置的组成结构示意图。 具体实施方式
本发明的基本思想是: 在确认用户终端需进行重定位时, 源无线接入 网控制器通过其与目标无线接入网控制器之间的逻辑接口直接向目标无线 接入网控制器请求资源分配, 并在确认目标无线接入网控制器已分配资源 后, 源无线接入网控制器再向核心网发送重定位要求消息 /切换要求消息, 同时或延迟一定时长再向用户终端发送切换命令消息。 由于资源分配的请 求是直接发送目标无线接入网控制器的, 因此, 资源分配的过程将会更快 捷; 并且, 重定位要求消息 /切换要求消息及切换命令消息可以设定为同时 或间隔一段时间发送, 源无线接入网控制器接收到切换完成消息及重定位 命令消息是并行进行, 因此, 本发明重定位所需的时间较短, 对于移动速 度较高的用户终端而言, 也能保证通信质量。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
图 1为本发明一种重定位过程中的资源预留方法的流程图, 图 1所示 的重定位过程中的资源预留方法适用于源无线接入网控制器侧, 如图 1 所 示, 本发明重定位过程中的资源预留方法包括以下步骤:
步骤 101 : 确定用户终端需重定位时, 源无线接入网控制器通过其与目 标无线接入网控制器之间的逻辑接口向所述目标无线接入网控制器发送无 线资源请求消息。
所述无线资源请求消息至少包括目标小区标识信息, 用户终端的能力 信息、 标识信息以及当前的业务类型信息。 无线资源请求消息的格式可参 见表 1 : 字段名称 取值说明
包括 UE所支持的无线接入网络、业务类型等
UE能力
能力
小区标识 目标小区的标识
业务类型 请求无线资源的业务类型
UE的国际移动用户识别码 IMSI , 或者系统
UE标识
所分配的无线网络临时标识 SRNTI等
Figure imgf000010_0001
表 1 所示的无线资源请求消息的格式为示例性说明, 并非是限定无线资源 请求消息的具体格式。 表 1 中所示仅是无线资源请求消息中所携带的基本 信息。
这里, 无线接入网控制器是指 3G通信系统中的 RNC或 2G系统中的
BSC,源无线接入网控制器与目标无线接入网控制器之间的逻辑接口为 IUR 接口或是 IUR-G接口。 本实施例中, 源无线接入网控制器及目标无线接入 网控制器所属的核心网可以相同, 也可以不同。。
步骤 102: 接收到无线资源请求消息后, 目标无线接入网控制器根据用 户请求的业务类型和用户的能力信息为需重定位的用户终端分配并预留无 线资源, 并通过源无线接入网控制器与目标无线接入网控制器之间的逻辑 接口将无线资源响应消息通知源无线接入网控制器。
无线资源响应消息至少包括目标无线接入网控制器为用户终端在目标 小区预留的无线资源信息。 无线资源响应消息为无线资源请求消息的响应 消息, 还可以包括目标无线接入网控制器为用户终端在目标小区分配的标 识信息等。 无线资源响应消息的具体格式可参见表 2所示: 字段名称 取值说明
UE标识 UE的 IMSI或者系统所分配的 SRNTI等
目标无线接入网控制器在目标小区中为 UE
UE新标识
分配的新标识 目标无线接入网控制器在目标小区中为 UE 无线资源
无线资源
Figure imgf000011_0001
表 2 所示的无线资源响应消息的格式为示例性说明, 并非是限定无线 资源响应消息的具体格式。
这里, 无线接入网控制器是指 3G通信系统中的 RNC或 2G系统中的 BSC。 逻辑接口包括 IUR接口或 UR-G接口。
本领域技术人员应当理解, 单独的步骤 102 即可实现资源的预留, 步 骤 101是使本发明技术方案更清楚而设置的。 步骤 102所揭示的方法适用 于目标无线接入网控制器侧。
图 2为本发明重定位方法的流程图, 如图 2所示, 本发明重定位方法 包括以下步骤:
步骤 201 :源无线接入网控制器通过其与目标无线接入网控制器之间的 逻辑接口接收所述目标无线接入网控制器发送的无线资源响应消息, 确认 所述目标无线接入网控制器为用户终端预留了资源, 向核心网发送重定位 要求消息 /切换要求消息, 同时或之后向所述用户终端发送切换到所述目标 小区所分配的无线资源上的切换命令消息; 所述无线资源响应消息至少包 括所述目标无线接入网控制器为所述用户终端在目标小区预留的无线资源 信息。 无线资源响应消息参见前述图 1中的相关描述。
源无线接入网控制器发送所述重定位要求消息 /切换要求消息之后向所 述用户终端发送切换命令消息的延迟不大于时长 T, 所述时长 T为所述源 无线接入网控制器发送重定位要求消息 /切换要求消息至接收到所述核心网 返回的重定位命令消息的时间间隔与所述源无线接入网控制器向所述用户 终端发送切换命令消息至所述目标无线接入网控制器接收到所述用户终端 的切换完成消息的时间间隔之差值。本发明发送切换命令消息的延迟时长 T 可根据实际系统统计结果或根据经验值设定, 也可以通过相关的仿真系统 而确定。
步骤 202:所述目标无线接入网控制器接收到核心网发送的重定位请求 消息 /切换请求消息后, 完成所述目标无线接入网控制器与所述核心网之间 的资源建立。
其中, 所述重定位要求消息 /切换要求消息中携带有目标无线接入网控 制器为所述用户终端分配的新标识信息。 完成所述目标无线接入网控制器 与所述核心网之间的资源建立, 具体为: 目标无线接入网控制器根据所述 用户终端的国际移动用户识别码或所述新标识将所述目标无线接入网控制 器与所述核心网之间的资源与所述目标无线接入网控制器为所述用户终端 所预留的无线资源关联, 并向所述核心网发送重定位请求确认消息 /切换请 求确认消息。
这里, 无线接入网控制器是指 3G通信系统中的 RNC或 2G系统中的 BSC。 逻辑接口包括 IUR接口或 UR-G接口。
图 3为本发明重定位过程中资源回退方法的流程图, 如图 3所示, 本 发明重定位过程中的资源回退方法包括:
步骤 301 : 接收到核心网发送的重定位准备失败消息时, 源无线接入网 控制器通过其与目标无线接入网控制器之间的逻辑接口向所述目标无线接 入网控制器发送无线资源取消消息; 无线资源取消消息至少包括所述源无 线接入网控制器在源小区为用户终端分配的无线资源信息, 还可以包括 UE 标识和 UE新标识信息。 无线资源取消消息的格式如表 3所示: 字段名称 取值说明
UE标识 UE的 IMSI或者系统所分配的 SRNTI等 目标无线接入网控制器在目标小区中为 UE
UE新标识
分配的新标识 源无线接入网控制器在源小区中为 UE分配 无线资源
的无线资源 表 3 所示的无线资源取消消息的格式为示例性说明, 并非是限定无线资源 取消消息的具体格式。
这里, 无线接入网控制器是指 3G通信系统中的 RNC或 2G系统中的 BSC,本发明中, 源无线接入网控制器及目标无线接入网控制器所属的核心 网可以相同, 也可以不同。 这样, 源无线接入网控制器与目标无线接入网 控制器之间的逻辑接口为 IUR接口或是 IUR-G接口。
步骤 302: 接收到无线资源取消消息后, 目标无线接入网控制器释放为 所述用户终端预留的无线资源。 并且, 在确定用户终端已完成切换后, 将 向 UE发送切换回源无线接入网控制器的命令,请求 UE切换回源无线接入 网控制器为 UE分配的无线资源。
下 面将以通用 移动通信 系 统 ( UMTS , Universal Mobile Telecommunications System )的电路交换 ( CS, Circuit Switching ) i或为例进 一步阐明本发明的技术方案。 图 4为本发明整个重定位方法实施例一的流程图, 如图 4所示, 在本 实施例中,假定目标无线接入网控制器在重定位流程中先接收到了 CN的重 定位请求消息,后接收到了 UE的空口切换完成消息。本示例包括如下步骤: 步骤 401 : UE在源 RNC的小区 1成功建立了 CS业务, 当 UE移动后, 源 RNC (小区 1所在的 RNC )根据 UE的测量报告, 选择目标 RNC (小区 2所在的 RNC )的小区 2为目标小区, 源 RNC通过 IUR接口的无线资源请 求消息请求目标 RNC为 UE分配相关无线资源; 在消息中携带了目标小区 2的标识, 此外, 此消息中还可以携带 UE当前的业务类型和 UE标识等信 息。 本示例的无线资源请求消息的格式如表 4所示:
Figure imgf000014_0003
Figure imgf000014_0001
步骤 402: 目标 RNC通过 IUR接口接收到无线资源请求消息后, 在小 区 2中为 UE分配无线资源信息,并且通过无线资源响应消息 ·ί巴为 UE分配 无线资源信息以及 UE的标识等内容发给源 RNC。 本示例的无线资源响应 消息的格式如表 5所示:
Figure imgf000014_0004
Figure imgf000014_0002
步骤 403: 源 RNC接收到目标 RNC的无线资源响应消息后,确定目标 RNC分配并预留了无线资源, 立刻向 CN发起重定位要求消息, 并且在同 一个时刻或者延迟一定时间后向 UE发起切换到目标小区的切换命令消息, 消息中携带小区 2中为 UE分配的无线资源信息以及目标 RNC为 UE分配 的标识等内容。 这里, 延迟一定的时间发送切换命令消息, 所延迟的时间 是根据经验统计得到的, 具体的, 不能大于源 RNC向 CN发起重定位要求 消息到收到 CN的重定位命令消息的时间间隔与源 RNC向 UE发起切换命 令消息到目标 RNC接收到 UE的切换完成消息的时间间隔的绝对时间差。 也可是根据其他约定配置为一个固定的时间间隔, 例如时间间隔配置为零 或者其他值。
步骤 404: CN接收到重定位要求消息后, 向目标 RNC发送重定位请 求消息, 消息中携带步骤 402中目标 RNC为 UE分配的新标识, 目标 RNC 接收到 CN的重定位请求消息后, 完成目标 RNC与 CN之间的资源建立, 并且根据步骤 402中目标 RNC为 UE分配的标识,把上述建立的目标 RNC 和 CN之间的资源与步骤 402中已经给 UE分配的无线资源关联,给 CN回 应重定位请求确认消息; CN接收到目标 RNC控制器的重定位请求确认消 息后, 向源 RNC发送重定位命令消息。
源 RNC接收到重定位命令消息,执行步骤 405。如果源 RNC在一定时 间内没有接收到重定位命令消息,或接收到 CN的重定位准备失败消息,则 执行步骤 408;
步骤 405: 目标 RNC接收到 UE的切换完成消息后向 CN回应重定位 完成消息。
步骤 406: CN接收到目标 RNC的重定位完成消息后向源 RNC发起 IU 释放命令消息。
步骤 407: 源 RNC接收到 CN的 IU释放命令消息后完成 UE相关资源 的释放, 流程结束。
步骤 408: 源 RNC通过 IUR接口发送无线资源取消消息, 消息中包括 源 RNC为 UE分配的无线资源信息,还可以包括目标 RNC为 UE分配的新 标识等内容。 本示例的无线资源取消消息的格式如表 6所示: 字段名称 取值说明
UE标识 UE的 IMSI或 SRNTI、 DRNTI等标识
UE新标识 目标 RNC在小区 2中为 UE分配的新标识 无线资源 源 RNC在小区 1中为 UE分配的无线资源
Figure imgf000016_0001
步骤 409: 目标 RNC接收到无线资源取消消息时, 在接收到 UE的空 口切换完成消息后, 则命令 UE切换回源 RNC中, 并且把源 RNC为 UE分 配的无线资源通知到 UE, 然后释放目标 RNC中为此 UE保留的全部资源 信息。 流程结束
图 5为本发明整个重定位方法实施例二的流程图, 如图 5所示, 假定 目标无线接入网控制器在重定位流程中先接收到了 UE 的空口切换完成消 息, 后接收到了 CN的重定位请求消息。 本示例包括以下步骤:
步骤 501 : UE在源 RNC (小区 1所在的 RNC ) 的小区 1成功建立了 CS业务, 当 UE移动后, 源 RNC根据 UE的测量报告, 选择目标 BSC的 小区 2为目标小区,源 RNC通过 IUR-G接口的无线资源请求消息请求目标 BSC (小区 2所在的 BSC )为 UE分配相关无线资源; 在消息中携带了目标 小区 2的标识, UE的能力和业务类型等信息, 此外, 还可以携带 UE的标 识等信息。 本示例中无线资源请求消息的格式如表 7所示:
Figure imgf000016_0002
表 7
步骤 502: 目标 BSC通过 IUR-G接口接收到无线资源请求消息后, 在 小区 2 中为 UE分配无线资源信息, 并且通过无线资源响应消息把无线资 源信息以及 UE的标识等内容发给源 RNC。 本示例中无线资源响应消息的 格式如表 8所示:
Figure imgf000017_0001
表 8
步骤 503 : 源 RNC接收到目标 BSC的无线资源响应消息后立刻向 CN 发起切换要求消息,切换要求消息可以包括目标 BSC为 UE分配的新标识, 并且在同一个时刻或者延迟一定时间后向 UE发起切换到 2G系统(小区 2 ) 的切换命令消息, 消息中携带目标 BSC小区 2中为 UE分配的无线资源信 息等内容。
这里, 延迟一定的时间发送切换命令消息, 所延迟的时间是根据经验 统计得到的,具体的,不能大于源 RNC向 CN发起切换要求消息到收到 CN 的重定位命令的时间间隔与源 RNC向 UE发起切换命令消息到目标 BSC接 收到 UE的切换完成消息的时间间隔的绝对时间差。也可是根据其他约定配 置为一个固定的时间间隔, 例如时间间隔配置为零或者其他值。
步骤 504: 目标 BSC接收到 UE的切换完成消息后,等待 CN的切换请 求消息; CN接收到源 RNC发送的切换要求消息后, 向目标 BSC发送切换 请求消息,消息中携带目标 BSC为 UE分配的新标识或者 UE的 IMSI等标 识; 目标 BSC接收到 CN的切换请求消息后, 完成 BSC和 CN之间资源的 建立, 并且根据消息中携带的 UE的标识, 把刚刚建立的目标 BSC和 CN 之间的资源与步骤 502中已经给 UE分配的无线资源关联,给 CN回应切换 请求确认消息和切换完成消息; CN接收到目标 BSC的切换请求确认和切 换完成消息后,向源 RNC发送重定位命令消息和 IU释放命令消息;源 RNC 接收到 CN的重定位命令消息, 重定位完成消息和 IU释放命令消息后, 完 成资源的释放, 流程结束。
如果源 RNC在一定时间内没有接收到 CN的重定位命令消息, 或接收 到 CN的重定位准备失败消息, 则执行步骤 505;
步骤 505: 源 RNC通过 IUR-G接口发送无线资源取消消息, 消息中包 括源 RNC为 UE分配的无线资源信息,还可以包括目标 BSC为 UE分配的 新标识等内容。 本示例中的无线资源取消消息格式如表 9所示:
Figure imgf000018_0002
Figure imgf000018_0001
步骤 506: 目标 BSC接收到无线资源取消消息后, 则命令 UE切换回 源 RNC为 UE分配的无线资源, 然后释放目标 BSC中为此 UE保留的全部 资源信息。
图 6为本发明重定位过程中资源预留装置的组成结构示意, 如图 6所 示, 本发明重定位过程中资源预留装置包括接收单元 60、 资源分配单元 61 和通知单元 62, 其中,接收单元 60用于接收源无线接入网控制器通过逻辑 接口发送的无线资源请求消息; 所述无线资源请求消息至少包括所述用户 终端需重定位的目标小区标识信息, 所述用户终端的能力信息、 标识信息 以及当前的业务类型信息; 资源分配单元 61用于在接收单元 60接收到所 述无线资源请求消息后, 为需重定位的用户终端分配并预留无线资源; 通 知单元 62用于通过所述逻辑接口将无线资源响应消息通知源无线接入网控 制器; 所述无线资源响应消息至少包括为所述用户终端在目标小区预留的 无线资源信息。
本领域技术人员应当理解, 图 6所示的重定位过程中的资源预留装置 是为实现图 1所示重定位过程中的资源预留方法而设计的, 图 6所示重定 位过程中资源预留装置中的各处理单元的实现功能可参照图 1、 图 4、 图 5 所示的方法中的相关描述而理解。 图 6所示的重定位过程中资源预留装置 中各单元的功能可通过运行于处理器上的程序而实现, 也可通过具体的逻 辑电路而实现。
图 7为本发明重定位装置的组成结构示意图, 如图 7所示, 本发明重 定位装置包括第一接收单元 70、 确认单元 71、 发送单元 72、 第二接收单元 73和资源建立单元 74, 其中, 第一接收单元 70用于通过源无线接入网控 制器与目标无线接入网控制器之间的逻辑接口接收所述目标无线接入网控 制器发送的无线资源响应消息; 所述无线资源响应消息至少包括所述目标 无线接入网控制器为所述用户终端在目标小区预留的无线资源信息; 确认 单元 71用于根据所述无线资源响应消息确认所述目标无线接入网控制器是 否为用户终端预留了资源, 是时触发发送单元 72; 发送单元 72用于向核心 网发送重定位要求消息 /切换要求消息, 同时或之后向所述用户终端发送切 换到所述目标小区所分配的无线资源上的切换命令消息; 第二接收单元 73 用于接收到核心网发送的重定位请求消息 /切换请求消息; 资源建立单元 74 用于在接收到重定位请求消息 /切换请求消息后, 完成所述目标无线接入网 控制器与所述核心网之间的资源建立。
本领域技术人员应当理解, 图 7所示的重定位装置是为实现图 2所示 重定位方法而设计的, 图 7所示重定位装置中的各处理单元的实现功能可 参照图 2、 图 4、 图 5所示的方法中的相关描述而理解。 图 7所示的重定装 置中各单元的功能可通过运行于处理器上的程序而实现, 也可通过具体的 逻辑电路而实现。 图 8 为本发明重定位过程中资源回退装置的组成结构示意图, 如图 8 所示, 本发明重定位过程中资源回退装置第一接收单元 80、 发送单元 81、 第二接收单元 82、 释放单元 83和切换单元 84, 其中, 第一接收单元 80用 于接收重定位准备失败消息; 发送单元 81用于在第一接收单元 80接收到 所述重定位准备失败消息后, 通过源无线接入网控制器与目标无线接入网 控制器之间的逻辑接口向所述目标无线接入网控制器发送无线资源取消消 息; 所述无线资源取消消息至少包括所述源无线接入网控制器在源小区为 用户终端分配的无线资源信息。 所述无线资源取消消息还包括目标无线接 入网控制器为所述用户终端分配新标识。 第二接收单元 82用于接收来自源 无线接入网控制器的无线资源取消消息; 所述无线资源取消消息至少包括 所述源无线接入网控制器在源小区为用户终端分配的无线资源信息; 所述 无线资源取消消息还包括所述目标无线接入网控制器为所述用户终端分配 新标识;释放单元 83用于在所述接收单元接收到所述无线资源取消消息后, 释放所述目标无线接入网控制器为所述用户终端预留的无线资源; 切换单 元 84用于命令所述用户终端切换到源无线接入网控制器在源小区为所述用 户终端分配的无线资源。
本领域技术人员应当理解, 图 8所示的重定位过程中资源回退装置中 的各处理单元的实现功能可参照前述重定位过程中资源回退方法以及图 3、 图 4及图 5所示的方法中的相关描述而理解。 图 8所示的重定位过程中资 源回退装置中各单元的功能可通过运行于处理器上的程序而实现, 也可通 过具体的逻辑电路而实现。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种重定位过程中的资源预留方法, 其特征在于, 所述方法包括: 接收源无线接入网控制器通过源无线接入网控制器与目标无线接入网 控制器之间的逻辑接口发送的无线资源请求消息;
之后, 目标无线接入网控制器为需重定位的用户终端分配并预留无线 资源, 并通过逻辑接口将无线资源响应消息通知源无线接入网控制器; 所述无线资源请求消息至少包括所述用户终端需重定位的目标小区标 识信息, 所述用户终端的能力信息、 标识信息以及当前的业务类型信息; 所述无线资源响应消息至少包括所述目标无线接入网控制器为所述用户终 端在目标小区预留的无线资源信息。
2、 根据权利要求 1所述的方法, 其特征在于, 所述逻辑接口包括 IUR 接口或 IUR-G接口。
3、 根据权利要求 1所述的方法, 其特征在于, 所述无线资源响应消息 还包括目标无线接入网控制器为所述用户终端分配的新标识信息。
4、 一种重定位方法, 其特征在于, 所述方法包括:
源无线接入网控制器通过其与目标无线接入网控制器之间的逻辑接口 接收所述目标无线接入网控制器发送的无线资源响应消息;
确认所述目标无线接入网控制器为用户终端预留了资源, 向核心网发 送重定位要求消息 /切换要求消息, 同时或之后, 向所述用户终端发送切换 到所述目标小区所分配的无线资源上的切换命令消 ,包、;
所述无线资源响应消息至少包括所述目标无线接入网控制器为所述用 户终端在目标小区预留的无线资源信息;
所述目标无线接入网控制器接收到核心网发送的重定位请求消息 /切换 请求消息后, 完成所述目标无线接入网控制器与所述核心网之间的资源建 立。
5、 根据权利要求 4 所述的方法, 其特征在于, 所述重定位要求消息 / 切换要求消息中携带有目标无线接入网控制器为所述用户终端分配的新标 识信息。
6、 根据权利要求 5所述的方法, 其特征在于, 完成所述目标无线接入 网控制器与所述核心网之间的资源建立, 具体为:
目标无线接入网控制器根据所述用户终端的国际移动用户识别码或所 述新标识, 将所述目标无线接入网控制器与所述核心网之间的资源与所述 目标无线接入网控制器为所述用户终端所预留的无线资源关联, 并向所述 核心网发送重定位请求确认消息 /切换请求确认消息。
7、 根据权利要求 4所述的方法, 其特征在于, 所述源无线接入网控制 器发送所述重定位要求消息 /切换要求消息之后向所述用户终端发送切换命 令消息的延迟不大于时长 T;
所述时长 T为所述源无线接入网控制器发送重定位要求消息 /切换要求 消息至接收到所述核心网返回的重定位命令消息的时间间隔、 与所述源无 线接入网控制器向所述用户终端发送切换命令消息至所述目标无线接入网 控制器接收到所述用户终端的切换完成消息的时间间隔之差值。
8、 一种重定位过程中的资源回退方法, 其特征在于, 所述方法包括: 接收到重定位准备失败消息时, 源无线接入网控制器通过其与目标无 线接入网控制器之间的逻辑接口向所述目标无线接入网控制器发送无线资 源取消消息; 其中, 所述无线资源取消消息至少包括所述源无线接入网控 制器在源小区为用户终端分配的无线资源信息;
接收到来自源无线接入网控制器的无线资源取消消息后, 所述目标无 线接入网控制器释放为用户终端预留的无线资源, 并命令所述用户终端切 换到源无线接入网控制器在源小区为所述用户终端分配的无线资源。
9、 根据权利要求 8所述的方法, 其特征在于, 所述无线资源取消消息 还包括所述目标无线接入网控制器为所述用户终端分配新标识。
10、根据权利要求 9所述的方法, 其特征在于, 所述逻辑接口包括 IUR 接口或 IUR-G接口。
11、 一种重定位过程中的资源预留装置, 其特征在于, 所述装置包括 接收单元、 资源分配单元和通知单元; 其中:
接收单元, 用于接收源无线接入网控制器通过源无线接入网控制器与 目标无线接入网控制器之间的逻辑接口发送的无线资源请求消息; 其中, 所述无线资源请求消息至少包括所述用户终端需重定位的目标小区标识信 息, 所述用户终端的能力信息、 标识信息以及当前的业务类型信息;
资源分配单元, 用于在所述接收单元接收到所述无线资源请求消息后, 为需重定位的用户终端分配并预留无线资源;
通知单元, 用于通过所述逻辑接口将无线资源响应消息通知源无线接 入网控制器; 其中, 所述无线资源响应消息至少包括为所述用户终端在目 标小区预留的无线资源信息。
12、根据权利要求 11所述的装置,其特征在于,所述逻辑接口包括 IUR 接口或 IUR-G接口。
13、 一种重定位装置, 其特征在于, 所述装置包括第一接收单元、 确 认单元、 发送单元、 第二接收单元和资源建立单元; 其中:
第一接收单元, 用于通过源无线接入网控制器与目标无线接入网控制 器之间的逻辑接口接收所述目标无线接入网控制器发送的无线资源响应消 息; 其中, 所述无线资源响应消息至少包括所述目标无线接入网控制器为 所述用户终端在目标小区预留的无线资源信息;
确认单元, 用于根据所述无线资源响应消息确认所述目标无线接入网 控制器为用户终端预留了资源时, 触发发送单元;
发送单元, 用于向核心网发送重定位要求消息 /切换要求消息, 同时或 之后, 向所述用户终端发送切换到所述目标小区所分配的无线资源上的切 换命令消息;
第二接收单元, 用于接收到核心网发送的重定位请求消息 /切换请求消 息;
资源建立单元, 用于在所述第二接收单元接收到重定位请求消息 /切换 请求消息后, 完成所述目标无线接入网控制器与所述核心网之间的资源建 立。
14、 根据权利要求 13所述的装置, 其特征在于, 所述重定位要求消息 /切换要求消息中携带有目标无线接入网控制器为所述用户终端分配的新标 识信息。
15、 根据权利要求 14所述的装置, 其特征在于, 所述资源建立单元进 一步根据所述用户终端的国际移动用户识别码或所述新标识将所述目标无 线接入网控制器与所述核心网之间的资源与所述目标无线接入网控制器为 所述用户终端所预留的无线资源关联, 并向所述核心网发送重定位请求确 认消息 /切换请求确认消息。
16、 根据权利要求 13所述的装置, 其特征在于, 所述发送单元发送所 述重定位要求消息 /切换要求消息之后向所述用户终端发送切换命令消息的 延迟不大于时长 Τ, 所述时长 Τ为所述源无线接入网控制器发送重定位要 求消息 /切换要求消息至接收到所述核心网返回的重定位命令消息的时间间 隔、 与所述源无线接入网控制器向所述用户终端发送切换命令消息至所述 目标无线接入网控制器接收到所述用户终端的切换完成消息的时间间隔之 差值。
17、 一种重定位过程中的资源回退装置, 其特征在于, 所述装置包括 第一接收单元、 发送单元、 第二接收单元、 释放单元和切换单元; 其中: 第一接收单元, 用于接收重定位准备失败消息; 发送单元, 用于在所述接收单元接收到所述重定位准备失败消息后, 通过源无线接入网控制器与目标无线接入网控制器之间的逻辑接口向所述 目标无线接入网控制器发送无线资源取消消息; 其中, 所述无线资源取消 消息至少包括所述源无线接入网控制器在源小区为用户终端分配的无线资 源信息;
第二接收单元, 用于接收来自源无线接入网控制器的无线资源取消消 息; 所述无线资源取消消息至少包括所述源无线接入网控制器在源小区为 用户终端分配的无线资源信息; 其中, 所述无线资源取消消息还包括所述 目标无线接入网控制器为所述用户终端分配新标识;
释放单元, 用于在所述接收单元接收到所述无线资源取消消息后, 释 放所述目标无线接入网控制器为所述用户终端预留的无线资源;
切换单元, 用于命令所述用户终端切换到源无线接入网控制器在源小 区为所述用户终端分配的无线资源。
18、根据权利要求 17所述的装置,其特征在于,所述逻辑接口包括 IUR 接口或 IUR-G接口。
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