WO2010124430A1 - 一种无线通信网络的业务恢复方法、装置及系统 - Google Patents
一种无线通信网络的业务恢复方法、装置及系统 Download PDFInfo
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- WO2010124430A1 WO2010124430A1 PCT/CN2009/071479 CN2009071479W WO2010124430A1 WO 2010124430 A1 WO2010124430 A1 WO 2010124430A1 CN 2009071479 W CN2009071479 W CN 2009071479W WO 2010124430 A1 WO2010124430 A1 WO 2010124430A1
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- message
- network device
- user equipment
- rrc
- request
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/305—Handover due to radio link failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Definitions
- the present invention relates to a wireless communication technology, and in particular, to a service recovery method, apparatus, and system for a wireless communication network. Background technique
- the cell suddenly breaks down, or suddenly powers down, and the cell does not work normally.
- the service of the user equipment (UE, User Equipment) in the active state is interrupted.
- the UE will detect the radio link failure (RLF, Radio Link Fai lure), the UE will reselect a new cell, and then initiate the re-establishment of the radio link. process.
- RLF Radio Link Fai lure
- the inventor finds that the prior art fails in the cell, and after the UE selects a new cell, the UE does not provide a technical solution for how the access network device of the new cell establishes a connection with the core network, and cannot guarantee the UE in the activated state. Business continuity. Summary of the invention
- An embodiment of the present invention provides a service recovery method for a wireless communication network, including: receiving a radio resource control RRC reestablishment request or a cell update message from a user equipment; if the RRC reestablishment fails or the cell update fails, performing a non-user device
- the access layer triggers an RRC establishment process; after the foregoing RRC establishment process is completed, the initial user equipment message is sent to the core network device.
- the embodiment of the present invention further provides a service recovery method for a wireless communication network, including: receiving a radio resource control RRC reestablishment request or a cell update message from a user equipment; if the context information of the user equipment is not known, sending a notification to the source base station The message is to initiate a handover preparation process of the X2 and/or S1 interface by the source base station.
- the embodiment of the present invention further provides a service recovery method for a wireless communication network, including: receiving a radio resource control RRC reestablishment request or a cell update message from a user equipment; acquiring context information of the user equipment, and sending a notification message to the core network device, requesting Establish a connection with the core network device.
- a service recovery method for a wireless communication network including: receiving a radio resource control RRC reestablishment request or a cell update message from a user equipment; acquiring context information of the user equipment, and sending a notification message to the core network device, requesting Establish a connection with the core network device.
- the embodiment of the present invention further provides a service recovery apparatus for a wireless communication network, including: a receiving unit, configured to receive a radio resource control RRC reestablishment request or a cell update message from a user equipment; and an RRC establishing unit, configured to fail in the RRC reestablishment or When the cell update fails, the RRC establishment process initiated by the non-access stratum of the user equipment is performed; and the processing unit is configured to send an initial user equipment message to the core network device after the RRC establishment process is completed.
- a receiving unit configured to receive a radio resource control RRC reestablishment request or a cell update message from a user equipment
- RRC establishing unit configured to fail in the RRC reestablishment or When the cell update fails, the RRC establishment process initiated by the non-access stratum of the user equipment is performed
- the processing unit is configured to send an initial user equipment message to the core network device after the RRC establishment process is completed.
- the embodiment of the present invention further provides a service recovery apparatus for a wireless communication network, including: a receiving unit, configured to receive a radio resource control RRC reconfiguration request or a cell update message from a user equipment; and a notification unit, configured to not know the user equipment And sending a notification message to the source access network device to request the source access network device to initiate a handover preparation process of the X2 and/or S1 interface.
- a receiving unit configured to receive a radio resource control RRC reconfiguration request or a cell update message from a user equipment
- a notification unit configured to not know the user equipment And sending a notification message to the source access network device to request the source access network device to initiate a handover preparation process of the X2 and/or S1 interface.
- the embodiment of the present invention further provides a service recovery apparatus for a wireless communication network, including: a receiving unit, configured to receive a radio resource control RRC reestablishment request or a cell update message from a user equipment, where the RRC reconfiguration request or the cell update message carries the foregoing And a sending unit, configured to send a notification message to the core network device, requesting to establish a connection with the core network device.
- a receiving unit configured to receive a radio resource control RRC reestablishment request or a cell update message from a user equipment, where the RRC reconfiguration request or the cell update message carries the foregoing
- a sending unit configured to send a notification message to the core network device, requesting to establish a connection with the core network device.
- the embodiment of the present invention further provides a service recovery of a wireless communication network, including a core network device and a service recovery device of the wireless communication network as described above.
- the connection establishment process of the new cell access network device and the core network device when the service is restored ensures the activation state.
- FIG. 1 is a schematic diagram of coverage of a different system cell
- 2 is a schematic structural diagram of an LTE system
- 3 is a schematic structural diagram between an LTE system and a UMTS/GSM system
- FIG. 4 is a schematic diagram of a service recovery process in Embodiment 1 of the present invention.
- FIG. 5 is a schematic diagram of a service recovery process in Embodiment 2 of the present invention.
- FIG. 6 is a second schematic diagram of a service recovery process in Embodiment 2 of the present invention.
- FIG. 7 is a schematic diagram of a service recovery process in Embodiment 3 of the present invention.
- Embodiment 8 is a schematic diagram of a service recovery process in Embodiment 4 of the present invention.
- Embodiment 9 is a schematic diagram of a service recovery process in Embodiment 5 of the present invention.
- FIG. 10 is a schematic diagram of a service recovery process in Embodiment 6 of the present invention.
- FIG. 11 is a structural block diagram of a service recovery apparatus in Embodiment 7 of the present invention.
- FIG. 12 is a second structural block diagram of a service recovery apparatus according to Embodiment 7 of the present invention.
- FIG. 13 is a structural block diagram of a service recovery apparatus in Embodiment 8 of the present invention.
- FIG. 14 is a second structural block diagram of a service recovery apparatus according to Embodiment 8 of the present invention.
- FIG. 15 is a block diagram showing the structure of a service recovery apparatus in Embodiment 9 of the present invention. detailed description
- the different system cell or the inter-frequency cell may cover the network.
- a cell A and a UMTS (Universal Mobile Telecommunications System) cell A' in an LTE (Long Term Evolution) system collectively cover an area.
- the network structure diagram of the LTE system is shown in Figure 2, and the core network equipment MME (Mobility Management)
- the interface between the Entity, the mobility management entity and the evolved NodeB (eNB) is the SI interface, the SI 0 interface between the different MMEs, the X2 interface between the different eNBs, and the Uu interface between the eNB and the UE.
- the Uu interface is sent through an RRC (Radio Resource Control) message. Communicate.
- the connection between the LTE system and UMTS/GSM is shown in Figure 3.
- RNC/BSC Radio Network Controller/Base Station Controller
- SGSN Serving GPRS Support
- the cell may also be a different system cell, such as a UMTS cell or a GSM cell.
- the embodiment provides a service recovery method for a wireless communication network.
- the method includes: Step 11: A new cell access network device receives an RRC reestablishment request or a cell update message from a UE.
- the UE finds the RLF, it reselects the new cell and sends an RRC reestablishment request to the base station of the new cell.
- the new cell may be an LTE cell or a UMTS cell or a GSM cell.
- the access network device of the LTE cell is an eNB, and the access network device of the UMTS/GSM cell is an RNC/BSC.
- the message sent by the UE is an RRC reestablishment request message.
- the new cell is a UMTS/GSM cell
- the message sent by the UE is an RRC reestablishment request or a cell update message.
- Step 12 If the access network device of the new cell does not find the context information of the user equipment, send a corresponding R C reestablishment failure message or a cell update failure message or do not send any message to the user equipment.
- Step 13 Perform an RRC setup procedure triggered by a NAS (Non-Access-Stratum, Non-Access Stratum).
- the above RRC establishment procedure is triggered by the non-access stratum of the UE.
- the non-access stratum triggers the establishment of a new cell.
- the RRC message from the UE may be accompanied by an indication or a cause value, indicating that the RRC establishment process is a process of "recovering" the link triggered by the non-access stratum.
- Step 14 After the RRC establishment process is completed, send an initial UE message to the core network device.
- the core network device for The LTE cell, the core network device is an MME, and for a UMTS/GSM cell, the core network device is an SGSN.
- the initial UE message is used to establish a connection between the new cell base station and the core network device, thereby ensuring the continuity of the UE service in the activated state.
- the embodiment provides a service recovery method of the wireless communication network.
- the new cell that is reselected by the UE is the cell of the LTE system.
- the access network device of the new cell is the eNB of the new cell, that is, new. eNB. As shown in Figure 5, the following processes are included:
- Step 101 When the UE finds the RLF, it reselects the new cell and sends an RRC reestablishment request to the eNB (new eNB) of the new cell.
- Step 102 After receiving the foregoing RRC reestablishment request, the new eNB sends an RRC reestablishment failure message if the UE context is not found.
- Step 103 The non-access stratum of the UE triggers an RRC establishment process. After the NAS is triggered, the new eNB and the UE perform an RRC establishment process. Optionally, in the RRC setup process, the RRC message from the UE may be followed by an indication or a cause value indicating that the RRC setup process is a non-access stratum triggered "recovery" link.
- Step 104 After the RRC is established, the new eNB sends an initial UE message to the MME, which triggers the establishment of the S1 interface. For example, after receiving the R C setup complete message from the UE, the new eNB sends an Initial UE Message to the MME to trigger the establishment of the SI interface. This step implements the connection between the eNB and the MME through the initial UE message.
- Step 105 The new eNB receives an initial context setup request from the MME.
- Step 106 Perform a security authentication process between the UE and the new eNB.
- the new eNB can obtain the context information of the UE. This step is optional.
- Step 107 The new eNB and the UE perform RRC reconfiguration.
- Step 108 The new eNB sends an initial context setup response to the MME.
- the method further includes the step 109, the MME sends an S1 interface release command to the source eNB, and the source eNB is notified to release the S1 interface.
- the MME sends an S1 interface release command to the source eNB, and the source eNB is notified to release the S1 interface.
- the release of the S1 interface according to the S1 interface release command is only one of the modes. Therefore, the embodiment of the present invention is not limited thereto.
- the MME may be periodically released by triggering a timer.
- the two MMEs pass the S10 interface.
- the message is transmitted, that is, the new MME sends a message to the source MME to notify the source eNB to release the S1 interface, and then the source MME notifies the source eNB to release the S1 interface.
- the new eNB completes the establishment of the S1 interface by initiating an initial service flow, such as an initial UE message.
- the new cell is a UMTS/GSM cell
- the access network device RNC/BSC of the UMTS/GSM cell corresponds to the new eNB in the foregoing embodiment
- the Iu/A interface corresponds to the foregoing embodiment.
- the S1 interface, the new MME corresponds to the SGSN.
- the RNC/BSC sends an initial UE message of the Iu/A interface to establish the Iu/A interface.
- the new cell is a UMTS cell
- the service recovery method in this embodiment includes the following steps:
- Step 201 When the UE finds the RLF, reselects the new cell, and sends an RRC reestablishment request or a cell update message to the RNC (new RNC) of the new cell. Optionally, you can start a timer at the same time.
- Step 202 After receiving the foregoing RRC reestablishment request or the cell update message, the new RNC does not find the context of the user equipment (UE context), and sends an RRC reestablishment failure or cell update failure message or does not send any message.
- UE context the context of the user equipment
- Step 203 The non-access stratum (NAS) of the UE triggers an RRC establishment procedure. After receiving the failure message or the timer expires, the UE does not receive any message, and the NAS triggers the establishment of a new cell, and the new RNC and the UE perform an RRC establishment process.
- the RC message from the UE may be accompanied by an indication or a cause value, which is used to indicate that the RRC establishment process is a non-access stratum triggered "recovery" link.
- Step 204 After the RRC establishment is completed, the new RNC sends an initial UE message to the new SGSN, triggering establishment of the Iu interface.
- the UE initiates an initial direct transfer message and performs a service request.
- the new RNC sends an initial UE message to the new SGSN through the Iu interface, triggering the establishment of the Iu interface.
- Step 205 The new SGSN sends a downlink direct transmission message to the UE, and the new RNC relays the message for the response of the service request.
- Step 206 The new RNC and the UE perform a security authentication process. This step is optional.
- Step 207 The new SGSN sends a RAB (Radio Access Bearer) RAB assigned request message to the new RNC.
- RAB Radio Access Bearer
- Step 208 The new RNC and the UE perform establishment of a radio bearer.
- Step 209 The new RNC sends a RAB setup response message to the SGSN.
- the method further includes:
- Step 210 The new SGSN sends an S1 interface release command to the source MME through the S3 interface.
- Step 211 The source MME sends an S1 interface release command to the source eNB.
- the RNC of the new cell completes the establishment of the Iu interface with the SGSN of the new cell core network device through an initial UE message, thereby ensuring the continuity of the UE service in the activated state.
- the present embodiment provides a service recovery method for a wireless communication network.
- the new cell uses the LT E cell as an example.
- the access network device of the new cell is the eNB of the new cell, that is, the new eNB.
- the method includes:
- Step 301 The UE finds the RLF, reselects the new cell, and sends an RC reestablishment request to the new eNB.
- Step 302 After receiving the foregoing RRC reestablishment request, the new eNB does not find the UE context of the UE. Then, an RRC reestablishment failure message is sent to the UE.
- Step 303 After receiving the foregoing RRC reestablishment failure message, the UE triggers the RRC establishment process with the new eNB. After the NAS is triggered, the new eNB performs an RRC establishment process with the UE.
- the RRC message from the UE may be accompanied by an indication or a cause value, indicating that the RRC establishment process is a process of "recovering" the link triggered by the non-access stratum.
- Step 304 The new eNB sends a notification message to the source eNB, requesting the source eNB to initiate a handover preparation process of the X2 interface and/or the S1 interface.
- the method for the new eNB to notify the source eNB of the message includes: sending a notification message to the source eNB directly through the X2 interface, or sending a notification message to the MME through the S1 interface, and forwarding, by the MME, the notification message to the source eNB, that is, directly or indirectly notifying the source
- the base station initiates a handover preparation process of the X2/S1 interface.
- the source eNB After receiving the notification message, the source eNB initiates a handover preparation process of the X2/S1 interface. After the source eNB receives the notification message of the X2 interface from the new eNB or the notification message of the S1 interface from the MME, the source eNB performs the handover preparation process of the X2/S1 interface, and establishes the eNB and the new cell of the new cell after the handover preparation process. Connection of the S1 interface of the MME. Since the switching preparation process of the X2/S1 interface is prior art, it is not described in detail herein. Optionally, before the source eNB initiates the handover preparation process of the X2/S1 interface, the source eNB may also send a response message to the eNB of the new cell.
- step 304 of this embodiment
- the notification message may be first sent to the source eNB through the X2 interface.
- a timer can be started. If the X2 interface of the new eNB does not receive the response message or receives the failure message within the specified time, the new eNB sends a notification message to the MME through the S1 interface, and the MME transmits the notification message to the source eNB through the S1 interface.
- the source eNB initiates a handover preparation process for the X2 and S1 interfaces.
- the new eNB sends a notification message to the new MME through the S1 interface, and the new MME transmits the notification message to the source through the S10 interface.
- the MME forwards the notification message to the source eNB, and requests the source eNB to initiate a handover preparation process of the S1 interface.
- the access network device of the new cell is an RNC/BSC, corresponding to the eNB of the new cell, the Iu/A interface corresponds to the SI interface, and the core network device SGSN of the new cell corresponds to the new MME.
- the access network device RNC/BSC of the new cell sends an Iu/A interface notification message to the source eNB through the SGSN and the source MME, and requests the source eNB to perform the S1 interface switching preparation process.
- the message sent by the UE to the new cell after detecting the RLF may be an RRC reestablishment or a cell update message.
- the RNC/BSC sends a notification message to the SGSN through the Iu/A interface, and the SGSN sends the notification message to the source MME through the S3 interface, and the source MME forwards the notification message to the source base station through the S1 interface, and notifies the source base station to initiate the switching of the S1 interface.
- the source eNB After receiving the notification message, the source eNB performs a handover preparation process of the S1 interface, thereby establishing a connection between the RNC/BSC of the new cell and the Iu/A interface of the SGSN.
- the source eNB may also send a response message to the eNB of the new cell.
- the access network device of the new cell establishes a connection with the S1 interface of the new cell core network device MME by using the handover preparation process, or establishes a connection with the Iu/A interface of the SGSN, thereby ensuring the activation state.
- the continuity of the UE service Example 4
- the present embodiment provides a service recovery method for a wireless communication network.
- the new cell uses an LTE cell as an example.
- the access network device of the new cell is the eNB of the new cell, that is, the new eNB.
- the method includes:
- Step 501 The UE finds the RLF, reselects to the new cell, and sends an RRC reestablishment request to the new eNB.
- Step 502 The new eNB receives the re-establishment request, does not find the UE context of the user equipment, and sends a notification message to the source eNB/MME, requesting the source eNB to initiate a handover preparation process of the X2 and/or S1 interface.
- sending the notification message to the source eNB MME includes: sending a notification message to the source eNB directly through the X2 interface, or sending a notification message to the MME through the S1 interface, and the MME forwards the notification message to the source eNB to directly or indirectly notify the source.
- the base station initiates a handover preparation process of the X2/S1 interface.
- the source eNB After receiving the notification message, the source eNB initiates a handover preparation process for the X2/S1 interface, which may also be used before. A response message is sent to the eNB of the new cell.
- the notification message is preferably sent through the X2 interface as shown in FIG. Start a timer. If the X2 interface does not receive the response message or receives the failure message within the specified time, the new eNB sends a notification message to the MME through the S1 interface, and the MME transmits the notification message to the source eNB through the S1 interface, requesting the source eNB to initiate X2 and The switching preparation process of the S 1 interface.
- the new eNB sends a notification message to the new MME through the S1 interface, and the new MME passes the S10 interface.
- the source MME forwards the notification message to the source eNB, and the source MME is required to initiate the handover preparation process of the S1 interface.
- the RNC BSC of the new cell corresponds to the eNB of the new cell
- the Iu/A interface corresponds to the SI interface
- the RNC BSC sends a message to the SGSN through the Iu/A interface.
- the SGSN sends the notification message to the MME through the S3 interface message, and the MME forwards the notification message to the source eNB through the S1 interface, and requests the source eNB to perform the S1 handover preparation process.
- the SGSN can be forwarded to the RNC/BSC to send a notification response message.
- the message sent by the UE to the new cell after detecting the RLF may be an RRC reestablishment or a cell update message.
- the new cell access network device (eNB or RNC/BSC) triggers the connection with the new cell core network device MME/SGSN by sending a notification message to the source eNB or the source MME, and ensures the UE service in the activated state.
- the present embodiment provides a service recovery method for a wireless communication network.
- the new cell uses an LTE cell as an example.
- the access network device of the new cell is the eNB of the new cell, that is, the new eNB.
- the method includes:
- Step 701 The UE finds the RLF, reselects the new cell, and sends the RRC to the eNB (if eNB) of the new cell.
- Rebuild request The RRC reestablishment request carries a UE context, and the new eNB can acquire the context of the UE from the RRC reestablishment request.
- the RRC reestablishment request may further carry a UE identifier and/or an S1 interface application identifier (S1AP ID) of the source MME and the UE, where the UE identifier may be, for example, an S-TMSI (SAE Temporary Mobile Station Identity) or an IMSI. (International Mobile Subscriber Identity).
- S-TMSI SAE Temporary Mobile Station Identity
- IMSI International Mobile Subscriber Identity
- Step 702 The new eNB sends an S1 interface message to the MME, requesting to establish an S1 connection, such as a path switch message or a handover notification (HANDOVER NOTIFY) or other SI interface message.
- an S1 interface message such as a path switch message or a handover notification (HANDOVER NOTIFY) or other SI interface message.
- Step 703 The new eNB receives an S1 interface response message from the MME.
- Step 704 Send an RRC reestablishment success message to the UE.
- an RRC reestablishment failure message is sent to the UE in step 704.
- step 704 the method further includes:
- Step 705 The MME sends an S1 interface release command to the source eNB to notify the source eNB to release the S1 interface. If the new eNB is connected to the new MME, the source eNB is connected to the source MME, and the two MMEs transmit messages through the S10 interface, and the new eNB sends a notification source eNB to the new MME through the S1 interface. The message of the S1 interface is released, and then the new MME forwards the message to the source MME through the S10 interface, and then the source MME notifies the source eNB to release the connection of the S1 interface.
- the access network device RNC/BSC in the new cell corresponds to the eNB of the new cell, and the Iu/A interface corresponds to the SI interface, then the RNC/BSC will go to the core in the new cell.
- the network device SGSN sends a notification message of the Iu/A interface, which may be, for example, a relocation complete message or other Iu/A interface message.
- the SGSN sends an S3 interface message to the source MME, requesting the source eNB to release the S1 interface.
- the message sent by the UE to the new cell after detecting the RLF may be an RRC re-establishment or a cell update message.
- the access network device eNB/RNC/BSC of the new cell establishes a connection with the MME/SGSN through the S1 interface message or the Iu/A interface message, and ensures the continuity of the UE service in the activated state.
- the present embodiment provides a service recovery method for a wireless communication network.
- the new cell uses an LTE cell as an example.
- the access network device of the new cell is the eNB of the new cell, that is, the new eNB.
- the method includes:
- Step 901 The UE finds the RLF, reselects the new cell, and sends an RRC reestablishment request message to the eNB (new eNB) of the new cell, where the message carries a UE identifier, such as S-TMSI, or IMSI.
- Step 902 or 902 ′ the new eNB sends an X2 interface message to the source eNB or sends an S1 interface message to the core network MME to request the UE context, where the message carries a UE identifier, such as S-TMSI or IMSI.
- a UE identifier such as S-TMSI or IMSI.
- Step 903 or 903 ′ after receiving the X2 interface message or the S1 interface message, the source eNB/MME transmits the UE context to the new eNB according to the UE identifier, for example, S-TMSI or IMSI.
- the UE identifier for example, S-TMSI or IMSI.
- Step 904 The new eNB sends an S1 interface message, requesting to establish an S1 interface connection with the MME.
- the S1 interface message may be a path switch message (such as a path switch message), or a handover notification message (such as a HANDOVER NOTIFY message), or other SI interface message. .
- Step 905 The new eNB receives an S1 interface response message from the MME.
- Step 906 The new eNB sends the RRC reestablishment success to the UE.
- an RRC reestablishment failure message is sent to the UE in step 906.
- step 906 the method further includes:
- Step 907 The MME sends an S1 interface release command to the source eNB to notify the source eNB to release the S1 interface. If the MME of the new cell and the source eNB are different from each other, the MME sends a message through the S10 interface, and the source MME notifies the source eNB to release the connection of the S1 interface.
- step 902
- the request message of the X2 interface may be sent first, and the source eNB is requested to transmit the UE context.
- a timer can be started. If the X2 interface does not receive the response message or receives the failure message within the specified time, the new eNB sends a request message of the S1 interface to the MME, requesting the MME to deliver the UE context, the request message.
- the UE identifier is included, for example, S-TMSI, or IMSI.
- the source eNB is connected to the source MME, and the two MMEs transmit the message through the SI 0 interface, and the new MME transmits a request to the source MME through the S10 interface.
- the message including the UE identifier, such as S-TMSI or IMSI, requires the source MME to transmit the UE context; or the source MME forwards the request message to the source eNB, requesting the source eNB to transmit the UE context 0.
- the access network device RNC/BSC of the new cell corresponds to the eNB of the new cell
- the Iu/A interface corresponds to the SI interface
- the RNC/BSC will go to the core network device of the new cell.
- the SGSN sends a request message of the Iu/A interface, and the SGSN sends the request message to the MME through the S3 interface, and requests the MME to transmit the UE context.
- the MME After receiving the request message, the MME sends the request message to the eNB, requesting the eNB to send the UE. Context.
- the new cell is a UMTS/GSM cell
- the Iu/A interface message corresponds to the above path switch message or HANDOVER NOTIFY message or other S1 interface message, such as relocation complete message or other Iu/A interface message.
- the message sent by the UE to the new cell after detecting the RLF may be an RRC reestablishment or a cell update message.
- the access network device of the new cell establishes a connection with the MME/SGSN through the S1 interface message or the Iu/A interface message, and ensures the continuity of the UE service in the activated state.
- the embodiment of the present invention provides a service recovery apparatus 200 for a wireless communication network.
- the apparatus includes: a receiving unit 210, an RRC establishing unit 230, and a processing unit 240.
- the receiving unit 210 receives the C reestablishment request or the cell update message from the user equipment.
- the RRC establishing unit 230 performs the RRC initiated by the non-access stratum of the user equipment when the RRC reestablishment fails or the cell update fails. Establishing process; the processing unit 240 sends an initial user equipment message to the core network device after the foregoing RRC establishment process is completed.
- the apparatus 200 may further include: a context establishing unit 250, configured to receive an initial context setup request from a core network device, and send a context setup response to the core network device.
- the device may further include a failure response unit 220, configured to send an RRC reestablishment failure message or a cell update failure message to the user equipment when the RRC reconfiguration request or the cell update does not carry the context information of the user equipment.
- a context establishing unit 250 configured to receive an initial context setup request from a core network device, and send a context setup response to the core network device.
- the device may further include a failure response unit 220, configured to send an RRC reestablishment failure message or a cell update failure message to the user equipment when the RRC reconfiguration request or the cell update does not carry the context information of the user equipment.
- a failure response unit 220 configured to send an RRC reestablishment failure message or a cell update failure message to the user equipment when the RRC reconfiguration request or the cell update does not carry the context
- the embodiment of the present invention provides a service recovery apparatus 300 for a wireless communication network.
- the apparatus includes: a receiving unit 310 and a sending unit 340.
- the receiving unit 310 receives the RRC re-establishment request or the cell update message from the user equipment.
- the sending unit 340 sends a notification message to the source access network device to request the source access network device to initiate.
- the switching process preparation process of the X2 and/or S1 interface is a service recovery apparatus 300 for a wireless communication network.
- the apparatus 300 may further include: a failure response unit 320 and an RRC establishment unit 330.
- the failure response unit 320 sends a corresponding RRC reestablishment failure message or a cell update failure message to the user equipment when the context information of the user equipment is not available.
- the RRC establishing unit 330 performs the RC establishment initiated by the non-access layer of the user equipment. process.
- the sending unit is further configured to send a notification message to the source access network device by using the X2 interface, and send the notification message to the source core network device when the notification response message is not received or the failure message is received within the set time. And transmitting, by the source core network device, the foregoing notification message to the source access network device; or the sending unit is further configured to send the foregoing notification message to the source core network device, where the source core network device forwards the foregoing to the source access network device Notification message.
- the embodiment of the present invention provides a service recovery apparatus 400 for a wireless communication network, as shown in FIG.
- the receiving unit 410 receives an RRC reconfiguration request or a cell update message from the user equipment, where the RRC reconfiguration request or the cell update message carries the context information and/or the user equipment identifier of the user equipment.
- the acquiring unit 420 acquires the context of the user equipment.
- the sending unit 430 sends a notification message to the core network device to establish a connection with the core network device.
- the acquiring unit 420 is further configured to: when the RRC reconfiguration request or the cell update message carries the context information of the user equipment, acquire the context information of the user equipment from the RRC reconfiguration request or the cell update message; or, in the foregoing RRC When the re-establishment request or the cell update message does not carry the context information of the user equipment, the request message is sent to the source access network device or the source core network device to request the user equipment's context information, where the request message carries the user equipment identifier.
- the acquiring unit 420 is further configured to send the request message to the source access network device by using the X2 interface; The request message is sent to the source core network device when the notification response message is not received or the failure message is received.
- the service recovery apparatus of the wireless communication network may be an eNB in an LTE system, or may be an RNC/BSC in UMTS/GSM.
- the embodiment of the present invention further provides a service recovery system for a wireless communication network, which can implement the service recovery method of the wireless communication network in Embodiments 1 to 6, and the system includes the wireless provided in Embodiment 7, 8, or 9. Service recovery device and core network device of the communication network.
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Description
一种无线通信网络的业务恢复方法、 装置及系统 技术领域
本发明涉及无线通信技术, 具体地涉及一种无线通信网络的业务恢复方法、 装置及系统。 背景技术
在移动网络运行期间, 有时会出现小区突然坏掉的情况, 或者突然掉电, 这时小区不能正常工作, 这时就会中断激活(active)状态下的用户设备(UE, User Equipment)的业务。在小区突然发生了故障, 不能正常工作时,对 UE来说, 会检测到无线链路失败(RLF, Radio Link Fai lure ) , UE会重选一个新小区, 然后发起无线链路的重新建链过程。
在实现本发明过程中, 发明人发现现有技术在小区发生故障, UE选择新小 区后, 没有提供新小区的接入网设备如何和核心网建立起连接的技术方案, 无 法保证激活状态下 UE业务的连续性。 发明内容
本发明实施例提供一种无线通信网络的业务恢复方法, 包括: 接收来自用 户设备的无线资源控制 RRC重建请求或小区更新消息; 如果该 RRC重建失败或 小区更新失败, 进行由该用户设备的非接入层触发 RRC建立过程; 在上述 RRC 建立过程完成后, 向核心网设备发送初始用户设备消息。
本发明实施例另提供一种无线通信网络的业务恢复方法, 包括: 接收来自 用户设备的无线资源控制 RRC重建请求或小区更新消息; 如果不能获知该用户 设备的上下文信息, 则向源基站发送通知消息, 以请求源基站发起 X2和 /或 S1 接口的切换预备过程。
本发明实施例另提供一种无线通信网络的业务恢复方法, 包括: 接收来自 用户设备的无线资源控制 RRC重建请求或小区更新消息; 获取用户设备的上下文 信息, 向核心网设备发送通知消息, 请求建立与所述核心网设备的连接。
本发明实施例另提供一种无线通信网络的业务恢复装置, 包括: 接收单元, 用于接收来自用户设备的无线资源控制 RRC重建请求或小区更新消息; RRC建立 单元, 用于在 RRC重建失败或小区更新失败时, 进行所述用户设备的非接入层发 起的 RRC建立过程; 和处理单元, 用于在所述 RRC建立过程完成后, 向核心网设 备发送初始用户设备消息。
本发明实施例另提供一种无线通信网络的业务恢复装置, 包括: 接收单元, 用于接收来自用户设备的无线资源控制 RRC重建请求或小区更新消息; 通知单 元, 用于在不能获知该用户设备的上下文信息时, 向源接入网设备发送通知消 息, 以请求源接入网设备发起 X2和 /或 S 1接口的切换预备过程。
本发明实施例另提供一种无线通信网络的业务恢复装置, 包括: 接收单元, 用于接收来自用户设备的无线资源控制 RRC重建请求或小区更新消息, 该 RRC重 建请求或小区更新消息中携带上述用户设备的上下文信息和 /或用户设备标识; 获取单元, 用于获取上述用户设备的上下文信息; 和发送单元, 用于向核心网 设备发送通知消息, 请求建立与该核心网设备的连接。
本发明实施例还提供一种无线通信网络的业务恢复, 包括核心网设备和如 上所述的无线通信网络的业务恢复装置。
本发明实施例提供的上述技术方案, 在小区突然故障不能正常工作, UE重 选到新小区时, 进行业务恢复时的新小区接入网设备和核心网设备的连接建立 过程, 保证了激活状态下 UE业务的连续性。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施 例描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅 仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳 动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为异系统小区的覆盖示意图;
图 2为 LTE系统的结构示意图;
图 3为 LTE系统和 UMTS/GSM系统之间的结构示意图;
图 4为本发明实施例 1中的业务恢复流程示意图;
图 5为本发明实施例 2中的业务恢复流程示意图之一;
图 6为本发明实施例 2中的业务恢复流程示意图之二;
图 7为本发明实施例 3中的业务恢复流程示意图;
图 8为本发明实施例 4中的业务恢复流程示意图;
图 9为本发明实施例 5中的业务恢复流程示意图;
图 10为本发明实施例 6中的业务恢复流程示意图;
图 11为本发明实施例 7中的业务恢复装置结构框图之一;
图 12为本发明实施例 7中的业务恢复装置结构框图之二;
图 13为本发明实施例 8中的业务恢复装置结构框图之一;
图 14为本发明实施例 8中的业务恢复装置结构框图之二;
图 15为本发明实施例 9中的业务恢复装置结构框图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
在移动通信系统中, 为了业务的连续性或者解决覆盖, 一般情况下异系统 小区或者异频小区可以同覆盖布网。 如图 1所示, LTE (Long Term Evolution, 长期演进)系统中的小区 A和 UMTS (Universal Mobile Telecommunications System, 通用移动通讯系统) 小区 A'共同覆盖了一块区域。
LTE系统的网络结构图如图 2所示,核心网设备 MME (Mobility Management
Entity, 移动管理实体) 和演进基站 (evolved NodeB, eNB) 之间的接口是 SI 接口, 不同 MME之间是 SI 0接口, 不同 eNB之间的是 X2接口, eNB和 UE之间的 是 Uu接口, Uu接口通过 RRC (Radio Resource Control, 无线资源控制) 消息来
进行通讯。
LTE系统和 UMTS/GSM之间的连接如图 3所示,接入网设备 RNC/BSC (Radio Network Controller/ Base Station Controller,无线网络控制器 /基站控制器 )与核 心网设备 SGSN (Serving GPRS Support Node, GPRS服务支持节点)之间的是 I u/A接口, MME和 SGSN之间的是 S3接口。
本发明如下实施例中将给出 LTE系统中的小区出现故障, UE重选到新小区 时, 新小区接入网设备和核心网设备的连接建立流程, 其中所述新小区即可以是 LTE系统的小区, 也可以是异系统小区, 例如为 UMTS小区或 GSM小区。 实施例 1
本实施例提供一种无线通信网络的业务恢复方法,如图 4所示,该方法包括: 歩骤 11,新小区接入网设备接收来自 UE的 RRC重建请求或小区更新消息。 当 UE发现 RLF, 会重选新小区, 向新小区的基站发送 RRC重建请求。 该 新小区可以为 LTE小区, 也可以为 UMTS小区或 GSM小区。 LTE小区的接入 网设备为 eNB, UMTS/GSM小区的接入网设备为 RNC/BSC。 在新小区为 LTE 小区时, UE发送的消息为 RRC重建请求消息,在新小区为 UMTS/GSM小区时, UE发送的消息为 RRC重建请求或小区更新消息。
步骤 12,如果上述新小区的接入网设备没有找到该用户设备的上下文信息, 则向该用户设备发送相应的 R C重建失败消息或小区更新失败消息或者不发送 任何消息。
步骤 13, 进行由 NAS (Non-Access-Stratum, 非接入层)触发的 RRC建立过 程。上述 RRC建立过程由 UE的非接入层触发。 UE收到失败消息或在设定时间内 没有收到任何消息, 则由非接入层触发与新小区的建链。 可选的, 上述 RRC建 立过程中, 来自 UE的 RRC消息中可带有一个指示或者原因值, 用来表示该 RRC 建立过程是非接入层触发的"恢复"链路的过程。
步骤 14, 在所述 RRC建立过程完成后, 向核心网设备发送初始 UE消息。 对于
LTE小区, 该核心网设备为 MME, 对于 UMTS/GSM小区, 该核心网设备为 SGSN。 本实施例通过该初始 UE消息, 建立了新小区基站与核心网设备的连接, 从 而保证了激活状态下 UE业务的连续性。 实施例 2
本实施例提供一种无线通信网络的业务恢复方法,本实施例中 UE重选的新 小区为 LTE系统的小区, 则本实施例中新小区的接入网设备为新小区的 eNB, 即 新 eNB。 如图 5所示, 包括如下流程:
步骤 101, 当 UE发现 RLF, 会重选新小区, 向新小区的 eNB (新 eNB)发送 RRC重建请求。
步骤 102, 新 eNB接收到上述 RRC重建请求后, 如果没有找到 UE的上下文 (UE context) , 则下发 RRC重建失败消息。
步骤 103, UE的非接入层触发 RRC建立过程。 NAS触发后, 新 eNB与 UE进 行 RRC建立过程。 可选的, 在该 RRC建立过程中, 来自 UE的 RRC消息中可带有 一个指示或者原因值, 用来表示该 RRC建立过程是非接入层触发的 "恢复 "链路 的过程。
步骤 104, RRC建立完成后, 新 eNB给 MME发送初始 UE消息, 触发 S1接口 的建立。 例如, 新 eNB接收到来自 UE的 R C建立完成消息后, 向 MME发送初始 UE消息 (Initial UE Message) , 触发 SI接口的建立。 本步骤通过初始 UE消息, 实现了 eNB与 MME之间的连接。
步骤 105, 新 eNB接收来自 MME的初始上下文建立请求。
步骤 106, UE和新 eNB之间进行安全认证过程。该过程中, 新 eNB可获得 UE 的上下文信息。 该步骤为可选项。
步骤 107, 新 eNB和 UE进行 RRC的重配置。
步骤 108, 新 eNB向 MME发送初始上下文建立应答。
上述步骤 105〜108与现有正常的业务请求流程相同。
可选的, 步骤 108后还包括步骤 109, MME给源 eNB发送 S1接口释放命令, 通知源 eNB释放 S1接口。源 eNB的 S1接口的释放有很多方式,根据 S1接口释放命 令释放 S1接口仅为其中一种方式, 因此本发明实施例并不限于此, 例如还可以 通过触发一个定时器, 来定时释放 MME和源 eNB之间的 S 1接口。
作为本发明另一实施例, 如果新小区的 eNB所连接的 MME发生了变化, 即 新 eNB所连接的新 MME和源 eNB相连的源 MME不是一个实体, 那么两个 MME 之间会通过 S10接口传递消息, 即由新 MME通过 S10接口向源 MME发送通知源 eNB释放 S1接口的消息, 再由源 MME通知源 eNB释放 S1接口。
上述实施例中, 新 eNB是通过发起一个始发业务流程, 如初始 UE消息, 来 完成 S1接口的建立。
作为本发明另一实施例, 如果新小区是 UMTS/GSM小区, 则 UMTS/GSM小 区的接入网设备 RNC/BSC对应上述实施例中的新 eNB, Iu/A接口对应于上述实施 例中的 S1接口, 新 MME对应于 SGSN, 该情况下, RNC/BSC会发送一个 Iu/A接 口的初始 UE消息来建立 Iu/A接口。 如图 6所示, 以新小区是 UMTS小区为例, 本 实施例的业务恢复方法包括如下步骤:
步骤 201, 当 UE发现 RLF, 重选新小区, 向新小区的 RNC (新 RNC) 发 送 RRC重建请求或小区更新 (cell update) 消息。 可选的, 可以同时启动一个 定时器。
步骤 202, 新 RNC接收到上述 RRC重建请求或小区更新消息后, 没有找 到该用户设备的上下文(UE context), 下发 RRC重建失败或小区更新失败消 息或者不发送任何消息。
步骤 203, UE的非接入层 (NAS)触发 RRC建立过程。 UE收到失败消息 或者定时器超时后, 没有收到任何消息, 则 NAS触发与新小区的建链, 新 RNC 与 UE进行 RRC建立过程。 可选的, 在上述 RRC建立过程中, 来自 UE的 R C 消息中可带有一个指示或者原因值, 用来表示该 RRC建立过程是非接入层触发 的"恢复"链路的过程。
步骤 204, 在 RRC建立完成后, 新 RNC向新 SGSN发送初始 UE消息, 触发 Iu接口的建立。例如, 新 RNC接收到 RRC建立完成消息后, UE发起初始直传 消息, 进行业务请求, 新 RNC通过 Iu接口向新 SGSN发送初始 UE消息(Initial UE Message ) , 触发 Iu接口的建立。
步骤 205, 新 SGSN向 UE发送下行直传消息, 新 RNC中转该消息, 用于业务 请求的应答。
步骤 206, 新 RNC和 UE进行安全认证过程。 该步骤是可选项。
步骤 207,新 SGSN向新 RNC发送无线接入承载(RAB, Radio Access Bearer) 建立请求 (RAB assigned request)消息。
步骤 208, 新 RNC和 UE进行无线承载的建立。
步骤 209, 新 RNC新向 SGSN发送 RAB建立应答消息。
上述步骤 204〜209与现有正常的业务请求流程相同。
可选的, 步骤 209后还可包括:
步骤 210, 新 SGSN通过 S3接口向源 MME发送 S1接口释放命令。
步骤 211, 源 MME给源 eNB发送 S1接口释放命令。
本实施例中, 新小区的 RNC是通过一个初始 UE消息, 来完成与新小区核心 网设备 SGSN之间的 Iu接口的建立, 从而保证了激活状态下 UE业务的连续性。
在 GSM系统中,类似的 BSC通过正常的业务建立的第一条 A接口消息,来完 成与 SGSN的 A接口的建立。 实施例 3
本实施例提供一种无线通信网络的业务恢复方法, 本实施例中新小区以 LT E小区为例, 则本实施例中新小区的接入网设备为新小区的 eNB, 即新 eNB。 如 图 7所示, 该方法包括:
步骤 301, UE发现 RLF, 重选新小区, 向新 eNB发送 R C重建请求。 步骤 302,新 eNB收到上述 RRC重建请求后,没有找到该 UE的 UE context,
则向该 UE下发 RRC重建失败消息。
步骤 303, UE收到上述 RRC重建失败消息后, 非接入层触发与新 eNB的 RRC建立过程。 NAS触发后, 新 eNB与 UE进行 RRC建立过程。 可选的, 上 述 RRC建立过程中,来自 UE的 RRC消息中可带有一个指示或者原因值,用来 表示该 RRC建立过程是非接入层触发的 "恢复"链路的过程。
步骤 304, 新 eNB向源 eNB发送通知消息, 要求源 eNB发起 X2接口和 / 或 S 1接口的切换预备过程。 新 eNB向源 eNB通知消息的方法包括: 直接通过 X2接口向源 eNB发送通知消息, 或者通过 S 1接口向 MME发送通知消息, 由 MME转发该通知消息至源 eNB,即以直接或间接通知源基站发起 X2/S 1接口的 切换预备过程。
源 eNB接收到该通知消息后, 发起 X2/S 1接口的切换预备过程。 SP, 源 eNB接收到来自新 eNB的 X2接口的通知消息或来自 MME的 S1接口的通知消 息后, 进行 X2/S 1接口的切换预备过程, 切换预备过程后便建立起新小区的 eNB与新 MME的 S1接口的连接。由于 X2/S1接口的切换预备过程为现有技术, 在此并不详述。 可选的, 在源 eNB发起 X2/S1接口的切换预备过程之前, 源 eNB也可以先发送应答消息给新小区的 eNB。
本实施例步骤 304中:
如果新 eNB当时不知道源 eNB运行状态, 并且新 eNB和源 eNB之间有 X2 接口, 可首先通过 X2接口向源 eNB发送通知消息。 同时可以启动一个定时器。 如果新 eNB的 X2接口在规定的时间内没有收到应答消息或者收到了失败消息, 那么新 eNB再通过 S1接口给 MME发送通知消息, MME通过 S 1接口将该通 知消息传递给源 eNB, 要求源 eNB发起 X2及 S1接口的切换预备过程。
如果新小区的 eNB和源 eNB相连的 MME不同, 即新 eNB连接新 MME, 源 eNB连接源 MME, 则新 eNB通过 S1接口向新 MME发送通知消息, 新 MME 通过 S10接口传递该通知消息给源 MME,源 MME向源 eNB转发这个通知消息, 要求源 eNB发起 S1接口的切换预备过程。
如果新小区是 UMTS/GSM小区, 则新小区的接入网设备为 RNC/BSC, 对 应上述的新小区的 eNB, Iu/A接口对应于上述 SI接口, 新小区的核心网设备 SGSN对应上述新 MME。 新小区的接入网设备 RNC/BSC会通过上述 SGSN和 源 MME向源 eNB发送一个 Iu/A接口的通知消息, 要求源 eNB进行 S1接口切 换预备过程。 UE检测到 RLF后给新小区发送的消息可以是 RRC重建或者小区 更新(cell update) 消息。 具体地, RNC/BSC通过 Iu/A接口向 SGSN发送通 知消息, SGSN通过 S3接口向源 MME发送该通知消息, 源 MME通过 S1接 口向源基站转发该通知消息, 通知源基站发起 S1接口的切换预备过程。源 eNB 接收到通知消息后, 进行 S1接口的切换预备过程, 从而建立起新小区的 RNC/ BSC与 SGSN的 Iu/A接口的连接。 可选的, 在源 eNB进行 S1接口的切换预备 过程之前, 源 eNB也可以先发送应答消息给新小区的 eNB。
本发明实施例中, 新小区的接入网设备利用切换预备过程建立起与新小区 核心网设备 MME的 S1接口的连接,或者建立起与 SGSN的 Iu/A接口的连接,从而 保证了激活状态下 UE业务的连续性。 实施例 4
本实施例提供一种无线通信网络的业务恢复方法, 本实施例中新小区以 LTE 小区为例, 则本实施例中新小区的接入网设备为新小区的 eNB, 即新 eNB。如图 8所示, 该方法包括:
步骤 501, UE发现 RLF, 重选到新小区, 向新 eNB发送 RRC重建请求。 步骤 502, 新 eNB收到重建请求, 没有找到该用户设备的 UE context, 向 源 eNB/MME发送通知消息,要求源 eNB发起 X2和 /或 S1接口的切换预备过程。 本步骤中, 向源 eNB MME发送通知消息包括: 直接通过 X2接口向源 eNB发送 通知消息, 或者通过 S1接口向 MME发送通知消息, 由 MME转发该通知消息 至源 eNB, 以直接或间接通知源基站发起 X2/S1接口的切换预备过程。
源 eNB接收到通知消息后, 发起 X2/S1接口的切换预备过程, 之前也可以
发送应答消息给新小区的 eNB。
如果新小区的 eNB (新 eNB ) 不知道源小区的 eNB (源 eNB)运行状态, 并 且该 eNB和源 eNB之间有 X2接口, 则如图 8所示优选通过 X2接口发送通知消息, 同时可以启动一个定时器。 如果 X2接口在规定的时间内没有收到应答消息或者 收到了失败消息, 那么新 eNB通过 S1接口向 MME发送通知消息, MME通过 S1 接口将该通知消息传递给源 eNB, 要求源 eNB发起 X2及 S 1接口的切换预备过程。
如果新小区的 eNB和源 eNB相连的 MME不同, 即新 eNB所连接的新 MME和源 eNB相连的源 MME不是一个实体,那么新 eNB通过 S1接口向新 MME发送通知消息, 新 MME通过 S10接口传递该通知消息给源 MME,源 MME再给源 eNB转发这个通 知消息, 要求源 eNB发起 S1接口的切换预备过程。
如果新小区是 UMTS/GSM小区, 则新小区的接入网设备 RNC/BSC对应上 述的新小区的 eNB, Iu/A接口对应于上述 SI接口, 那么 RNC BSC通过 Iu/A接 口向 SGSN发送一个通知消息, SGSN通过 S3接口消息向 MME发送这个通知 消息, MME通过 S1接口转发该通知消息至源 eNB, 要求源 eNB进行 S1切换 预备过程。 在源 eNB和 MME进行 S1接口切换前, 可以通过 SGSN中转给 RNC/ BSC发送通知应答消息。 UE检测到 RLF后给新小区发送的消息可以是 RRC 重建或者小区更新消息。
本发明实施例中,新小区接入网设备(eNB或 RNC/BSC)通过向源 eNB或源 MME发送通知消息来触发与新小区核心网设备 MME/SGSN的连接,保证了激活 状态下 UE业务的连续性。 实施例 5
本实施例提供一种无线通信网络的业务恢复方法, 本实施例中新小区以 LTE 小区为例, 则本实施例中新小区的接入网设备为新小区的 eNB, 即新 eNB。如图 9所示, 该方法包括:
步骤 701, UE发现 RLF, 重选新小区, 向新小区的 eNB (if eNB ) 发送 RRC
重建请求。 该 RRC重建请求中带有 UE context, 新 eNB从该 RRC重建请求中可以 获取 UE的上下文。可选的, RRC重建请求中还可携带 UE标识和 /或源 MME和 UE 的 S1接口应用标识 (S1AP ID) , 其中所述 UE标识例如可为 S-TMSI (SAE临时 移动台标识)或 IMSI (国际移动用户识别码) 。
步骤 702, 新 eNB向 MME发送 S1接口消息, 请求建立 S1连接, 例如路径转换 (path switch) 消息或者切换通知 (HANDOVER NOTIFY) 或者其他 SI接口消 息。
步骤 703, 新 eNB接收来自 MME的 S1接口应答消息。
步骤 704, 给 UE发送 RRC重建成功消息。
如果步骤 703中在设定时间内未接收到来自 MME的 S1接口应答消息,则在步 骤 704向 UE发送 RRC重建失败消息。
可选的, 步骤 704后还可包括:
步骤 705, MME给源 eNB发送 S1接口释放命令, 通知源 eNB释放 S1接口。 如果新 eNB和源 eNB连接的 MME不同, 即新 eNB连接新 MME, 源 eNB连接源 MME, 两个 MME之间会通过 S 10接口传递消息, 新 eNB通过 S 1接口向新 MME发 送通知源 eNB释放 S1接口的消息, 然后新 MME通过 S10接口将该消息转发给源 MME, 再由源 MME通知源 eNB释放 S 1接口的连接。
如果新小区是 UMTS/GSM小区, 则新小区中的接入网设备 RNC/BSC对应上 述的新小区的 eNB, Iu/A接口对应于上述 SI接口, 那么 RNC/BSC会向新小区中 的核心网设备 SGSN发送一个 Iu/A接口的通知消息, 例如可为 relocation complete (迁移完成)消息或其他 Iu/A接口消息。 SGSN向源 MME发送 S3接口消息,要求 源 eNB进行 S 1接口的释放。 UE检测到 RLF后给新小区发送的消息可以是 RRC重 建或者小区更新消息。
本实施例中新小区的接入网设备 eNB/RNC/BSC通过 S1接口消息或 Iu/A接口 消息建立了与 MME/SGSN的连接, 保证了激活状态下 UE业务的连续性。
实施例 6
本实施例提供一种无线通信网络的业务恢复方法, 本实施例中新小区以 LTE 小区为例, 则本实施例中新小区的接入网设备为新小区的 eNB, 即新 eNB。如图 10所示, 该方法包括:
步骤 901, UE发现 RLF, 重选到新小区, 向新小区的 eNB (新 eNB)发送 RRC 重建请求消息, 该消息中带有 UE标识, 例如 S-TMSI, 或 IMSI。
步骤 902或 902',新 eNB向源 eNB发送 X2接口消息或者向核心网 MME发送 S1 接口消息, 请求 UE context, 该消息中带有 UE标识, 例如 S-TMSI或 IMSI。
步骤 903或 903', 源 eNB/MME收到 X2接口消息或者 S1接口消息后, 根据 UE 标识, 例如 S-TMSI或 IMSI, 把 UE context传递给新 eNB。
步骤 904,新 eNB发送 S1接口消息,请求与 MME建立 S1接口连接, 该 S1接口 消息可以是路径切换消息 (如 path switch消息) 、 或者切换通知消息 (如 HANDOVER NOTIFY消息) 、 或者其他 SI接口消息。
步骤 905, 新 eNB接收到来自 MME的 S1接口应答消息。
步骤 906, 新 eNB给 UE发送 RRC重建成功。
如果步骤 905中新 eNB未接收到来自 MME的 S1接口应答消息, 则在步骤 906 向 UE发送 RRC重建失败消息。
可选的, 步骤 906后还可包括:
步骤 907, MME给源 eNB发送 S1接口释放命令, 通知源 eNB释放 S1接口。 如果新小区的 eNB和源 eNB连接的 MME不同, 则两个 MME之间会通过 S10 接口传递消息, 由源 MME通知源 eNB释放 S1接口的连接。
在步骤 902中:
如果新小区的 eNB当时不知道源小区的 eNB运行状态, 如果有 X2接口, 可首 先发送 X2接口的请求消息, 请求源 eNB传递 UE context。 同时可以启动一个定时 器。 如果 X2接口在规定的时间内没有收到应答消息或者收到了失败消息, 那么 新 eNB给 MME发送 S1接口的请求消息, 要求 MME传递 UE context, 该请求消息
中包含 UE标识例如 S-TMSI, 或 IMSI。
如果新小区的 eNB和源 eNB相连的 MME不同, 即新 eNB连接新 ΜΜΕ, 源 eNB 连接源 MME, 两个 MME之间会通过 SI 0接口传递消息, 新 MME通过 S10接口向 源 MME传递一个请求消息, 包含 UE标识, 例如 S-TMSI或 IMSI, 要求源 MME传 递 UE context; 或者源 MME给源 eNB转发这个请求消息, 要求源 eNB传递 UE context 0
如果新小区是 UMTS/GSM小区, 则新小区的接入网设备 RNC/BSC对应上述 的新小区的 eNB, Iu/A接口对应于上述 SI接口, 那么 RNC/BSC会向新小区的核 心网设备 SGSN发送一个 Iu/A接口的请求消息, SGSN通过 S3接口向 MME发送该 请求消息, 要求 MME传递 UE context; 或者 MME收到该请求消息后, 再给 eNB 发送这个请求消息, 要求 eNB发送这个 UE context。
新小区是 UMTS/GSM小区, Iu/A接口消息对应上述 path switch 消息或者 HANDOVER NOTIFY消息或者其他 S 1接口消息, 例如 relocation complete消息或 其他 Iu/A接口消息。 并且 UE检测到 RLF后给新小区发送的消息可以是 RRC重建 或者小区更新消息。
本实施例中新小区的接入网设备通过 S 1接口消息或 Iu/A接口消息建立了与 MME/SGSN的连接, 保证了激活状态下 UE业务的连续性。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤可 以通过程序来指令相关的硬件来完成, 该程序可以存储于一计算机可读取存储 介质中, 比如 ROM/RAM、 磁碟、 光盘等。 实施例 7
本发明实施例提供一种无线通信网络的业务恢复装置 200, 如图 11所示, 该装置包括: 接收单元 210, RRC建立单元 230和处理单元 240。其中, 接收单 元 210接收来自用户设备的 C重建请求或小区更新消息; RRC建立单元 230 在 RRC重建失败或小区更新失败时, 进行上述用户设备的非接入层发起的 RRC
建立过程; 处理单元 240在上述 RRC建立过程完成后, 向核心网设备发送初始 用户设备消息。
作为本发明另一实施例, 如图 12所示, 上述装置 200还可还包括: 上下文 建立单元 250,用于接收来自核心网设备的初始上下文建立请求, 并向上述核心 网设备发送上下文建立应答。可选的, 该装置还可包括失败响应单元 220, 用于 在该 RRC重建请求或小区更新中没有携带该用户设备的上下文信息时, 向上述 用户设备发送 RRC重建失败消息或小区更新失败消息。 实施例 8
本发明实施例提供一种无线通信网络的业务恢复装置 300, 如图 13所示, 该装置包括: 接收单元 310和发送单元 340。其中, 接收单元 310接收来自用户 设备的 RRC重建请求或小区更新消息; 发送单元 340在不能获知该用户设备的 上下文信息时, 向源接入网设备发送通知消息, 以请求源接入网设备发起 X2和 /或 S1接口的切换过程预备过程。
作为本发明另一实施例, 如图 14所示, 上述装置 300还可包括: 失败响应 单元 320和 RRC建立单元 330。 其中失败响应单元 320在不能获知该用户设备 的上下文信息时, 向上述用户设备发送相应的 RRC重建失败消息或小区更新失 败消息; RRC建立单元 330进行上述用户设备的非接入层发起的 R C建立过程。
进一步地, 上述发送单元还用于通过 X2接口向源接入网设备发送通知消 息; 在设定时间内未接收到通知应答消息或接收到失败消息时, 向源核心网设 备发送上述通知消息, 由源核心网设备向所述源接入网设备转发上述通知消息; 或者上述发送单元还用于向源核心网设备发送上述通知消息, 由源核心网设备 向所述源接入网设备转发上述通知消息。 实施例 9
本实施例提供一种无线通信网络的业务恢复装置 400,如图 15所示,包括:
接收单元 410, 获取单元 420和发送单元 430。
其中, 接收单元 410接收来自用户设备的 RRC重建请求或小区更新消息, 该 RRC重建请求或小区更新消息中携带该用户设备的上下文信息和 /或用户设 备标识; 获取单元 420获取该用户设备的上下文信息; 发送单元 430向核心网 设备发送通知消息, 请求建立与所述核心网设备的连接。
具体地, 上述获取单元 420进一步用于在上述 RRC重建请求或小区更新消 息中携带用户设备的上下文信息时, 从上述 RRC重建请求或小区更新消息中获 取用户设备的上下文信息; 或者, 在上述 RRC重建请求或小区更新消息中不携 带用户设备的上下文信息时, 向源接入网设备或源核心网设备发送请求消息, 请求用户设备的上下文信息, 该请求消息中携带用户设备标识。
更具体地, 在上述 RRC重建请求或小区更新消息中不携带用户设备的上下 文信息时,上述获取单元 420进一步用于向通过 X2接口向源接入网设备发送所 述请求消息; 在设定时间内未接收到通知应答消息或接收到失败消息时, 向所 述源核心网设备发送所述请求消息。
在本发明上述实施例中,所述无线通信网络的业务恢复装置可以是 LTE系统 中的 eNB, 也可以是 UMTS/GSM中的 RNC/BSC。
本发明实施例还提供一种无线通信网络的业务恢复系统, 该系统可以实现 上述实施例 1〜6中无线通信网络的业务恢复方法, 该系统包括上述实施例 7、 8 或 9中提供的无线通信网络的业务恢复装置和核心网设备。
以上所述的具体实施例, 对本发明的目的、 技术方案和有益效果进行了进 一步详细说明, 所应理解的是, 以上所述仅为本发明的具体实施例而已, 并不 用于限定本发明的保护范围, 凡在本发明的精神和原则之内, 所做的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。
Claims
1、 一种无线通信网络的业务恢复方法, 其特征在于, 包括:
接收来自用户设备的无线资源控制 RRC重建请求或小区更新消息; 如果 RRC重建失败或小区更新失败, 进行由所述用户设备的非接入层触发 的 RRC建立过程;
在所述 RRC建立过程完成后, 向核心网设备发送初始用户设备消息。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括:
接收来自所述核心网设备的初始上下文建立请求, 并向所述核心网设备发 送上下文建立应答。
3、 根据权利要求 1所述的方法, 其特征在于:
所述 R C建立过程中, 来自所述用户设备的 RRC消息中携带指示或者原 因值, 所述指示或者原因值用于指示该 RRC建立过程为非接入层触发的恢复链 路过程。
4、 一种无线通信网络的业务恢复方法, 其特征在于, 包括:
接收来自用户设备的无线资源控制 RC重建请求或小区更新消息; 如果不能获知该用户设备的上下文信息, 则向源接入网设备发送通知消息, 以请求源发起 X2和 /或 S1接口的切换预备过程。
5、 根据权利要求 4所述的方法, 其特征在于, 所述向源接入网设备发送通 知消息之前还包括:
向所述用户设备发送 RRC重建失败消息或小区更新失败消息;
进行由所述用户设备的非接入层触发的无线资源控制 RRC建立过程。
6、 根据权利要求 5所述的方法, 其特征在于, 所述 RRC建立过程中, 来 自所述用户设备的 RRC消息中携带指示或者原因值, 所述指示或者原因值用于 指示该 RRC建立过程为非接入层触发的恢复链路过程。
7、 根据权利要求 4或 5所述的方法, 其特征在于, 所述向源接入网设备发 送通知消息具体包括:
通过 X2接口向源接入网设备发送通知消息,如果在设定时间内未接收到通 知应答消息或接收到失败消息, 则向源核心网设备发送所述通知消息, 由该源 核心网设备向所述源接入网设备转发所述通知消息; 或者
向源核心网设备发送所述通知消息, 由该源核心网设备向所述源接入网设 备转发所述通知消息。
8、 一种无线通信网络的业务恢复方法, 其特征在于, 包括:
接收来自用户设备的无线资源控制 RRC重建请求或小区更新消息, 该 RRC 重建请求或小区更新消息中携带用户设备的上下文信息和 /或用户设备标识; 获取所述用户设备的上下文信息, 向核心网设备发送通知消息, 请求建立 与所述核心网设备的连接。
9、 根据权利要求 8所述的方法, 其特征在于, 所述方法还包括:
接收来自所述核心网设备的应答消息, 并向所述用户设备发送 RRC重建成 功消息或小区更新成功消息。
10、 根据权利要求 8所述的方法, 其特征在于, 所述获取用户设备的上下 文信息包括:
如果所述 RRC重建请求或小区更新消息中携带所述用户设备的上下文信 息,则从所述 RRC重建请求或小区更新消息中获取所述用户设备的上下文信息; 如果所述 RRC重建请求或小区更新消息中不携带所述用户设备的上下文信 息, 则向源接入网设备或源核心网设备发送请求消息, 请求所述用户设备的上 下文信息, 该请求消息中携带所述用户设备标识。
11、 根据权利要求 10所述的方法, 其特征在于, 所述向源接入网设备或源 核心网设备发送请求消息包括:
通过 X2接口向源接入网设备发送所述请求消息;如果在设定时间内未接收 到源接入网设备的响应消息或接收到失败消息, 则向源核心网设备发送所述请 求消息。
12、 根据权利要求 11所述的方法, 其特征在于, 所述向源核心网设备发送 所述请求消息包括:
向当前核心网设备发送所述请求消息, 由所述当前核心网设备向所述源核 心网设备转发所述请求消息。
13、 一种无线通信网络的业务恢复装置, 其特征在于, 包括:
接收单元, 用于接收来自用户设备的无线资源控制 RC重建请求或小区更 新消息;
RRC建立单元,用于在 RRC重建失败或小区更新失败时,进行所述用户设 备的非接入层发起的 RRC建立过程; 和
处理单元, 用于在所述 RRC建立过程完成后, 向核心网设备发送初始用户 设备消息。
14、 根据权利要求 13所述的装置, 其特征在于, 还包括:
上下文建立单元, 用于接收来自核心网设备的初始上下文建立请求, 并向 所述核心网设备发送上下文建立应答。
15、 一种无线通信网络的业务恢复装置, 其特征在于, 包括:
接收单元, 用于接收来自用户设备的无线资源控制 RC重建请求或小区更 新消息; 和
发送单元, 用于在不能获知该用户设备的上下文信息时, 向源接入网设备 发送通知消息, 以请求源接入网设备发起 X2和 /或 S1接口的切换预备过程。
16、 根据权利要求 15所述的装置, 其特征在于, 还包括:
失败响应单元, 用于在不能获知该用户设备的上下文信息时, 向所述用户 设备发送 RRC重建失败消息或小区更新失败消息; 和
RRC建立单元, 用于进行所述用户设备的非接入层发起的 RRC建立过程。
17、 根据权利要求 15或 16所述的装置, 其特征在于, 所述发送单元进一 步用于: 通过 X2接口向所述源接入网设备发送所述通知消息; 在设定时间内未 接收到通知应答消息或接收到失败消息时, 向所述源核心网设备发送所述通知 消息, 由所述源核心网设备向所述源接入网设备转发所述通知消息; 或
用于向所述源核心网设备发送所述通知消息, 由所述源核心网设备向所述 源接入网设备转发所述通知消息。
18、 一种无线通信网络的业务恢复装置, 其特征在于, 包括:
接收单元, 用于接收来自用户设备的无线资源控制 RRC重建请求或小区更 新消息,该 RRC重建请求或小区更新消息中携带用户设备的上下文信息和 /或用 户设备标识;
获取单元, 用于获取用户设备的上下文信息; 和
发送单元, 用于向核心网设备发送通知消息, 请求建立与所述核心网设备 的连接。
19、根据权利要求 18所述的装置,其特征在于,所述获取单元进一步用于: 在所述 RRC重建请求或小区更新消息中携带用户设备的上下文信息时, 从 所述 RRC重建请求或小区更新消息中获取用户设备的上下文信息; 或者
在所述 RRC重建请求或小区更新消息中不携带用户设备的上下文信息时, 向源接入网设备或源核心网设备发送请求消息, 请求所述用户设备的上下文信 息, 该请求消息中携带所述用户设备标识。
20、 根据权利要求 19所述的装置, 其特征在于, 在所述 RRC重建请求或 小区更新消息中不携带用户设备的上下文信息时, 所述获取单元进一步用于: 通过 X2接口向所述源接入网设备发送请求消息,在设定时间内未接收到通 知应答消息或接收到失败消息时, 向所述源核心网设备发送请求消息。
21、 一种无线通信网络的业务恢复系统, 包括核心网设备, 其特征在于, 所述无线通信网络的业务恢复系统还包括如权利要求 14-20所述的无线通信网络 的业务恢复装置。
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| CN200980122137.1A CN102388654B (zh) | 2009-04-27 | 2009-04-27 | 一种无线通信网络的业务恢复方法、装置及系统 |
| EP13154424.9A EP2592868B8 (en) | 2009-04-27 | 2009-04-27 | Service recovery method and apparatus for a wireless communication network |
| PCT/CN2009/071479 WO2010124430A1 (zh) | 2009-04-27 | 2009-04-27 | 一种无线通信网络的业务恢复方法、装置及系统 |
| US13/282,988 US9730263B2 (en) | 2009-04-27 | 2011-10-27 | Service recovery method, apparatus, and system for a wireless communication network |
| ZA2011/08733A ZA201108733B (en) | 2009-04-27 | 2011-11-28 | Service recovery method, device and system for wireless communication networks |
| US15/644,019 US10098163B2 (en) | 2009-04-27 | 2017-07-07 | Service recovery method, apparatus, and system for a wireless communication network |
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| ZA (1) | ZA201108733B (zh) |
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Also Published As
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| EP2592868B8 (en) | 2020-11-04 |
| US9730263B2 (en) | 2017-08-08 |
| US20120077509A1 (en) | 2012-03-29 |
| US20170311372A1 (en) | 2017-10-26 |
| EP2426996A1 (en) | 2012-03-07 |
| EP2592868A1 (en) | 2013-05-15 |
| CN102388654A (zh) | 2012-03-21 |
| EP2426996A4 (en) | 2012-08-22 |
| US10098163B2 (en) | 2018-10-09 |
| EP2592868B1 (en) | 2020-08-05 |
| ZA201108733B (en) | 2012-09-26 |
| CN102388654B (zh) | 2015-11-25 |
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