WO2014166457A2 - 一种无线资源控制连接重建立的方法、系统及装置 - Google Patents

一种无线资源控制连接重建立的方法、系统及装置 Download PDF

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Publication number
WO2014166457A2
WO2014166457A2 PCT/CN2014/079160 CN2014079160W WO2014166457A2 WO 2014166457 A2 WO2014166457 A2 WO 2014166457A2 CN 2014079160 W CN2014079160 W CN 2014079160W WO 2014166457 A2 WO2014166457 A2 WO 2014166457A2
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enb
candidate
rrc connection
cell
establishment
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PCT/CN2014/079160
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English (en)
French (fr)
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WO2014166457A3 (zh
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章正权
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中兴通讯股份有限公司
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Publication of WO2014166457A2 publication Critical patent/WO2014166457A2/zh
Publication of WO2014166457A3 publication Critical patent/WO2014166457A3/zh

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    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/19Connection re-establishment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

Definitions

  • the present invention relates to a control management technology in the field of Long Term Evolution (LTE), and in particular, to a method, system and device for reestablishing a radio resource control (RRC) connection.
  • LTE Long Term Evolution
  • RRC radio resource control
  • the access layer of the user equipment (UE, User Equipment) is securely activated, once the radio link fails, or the handover fails, or the mobility failure from the E-UTRAN, or the integrity check fails, or the RRC connection reconfiguration fails, And the UE initiates an RRC connection re-establishment request procedure to the target base station, so as to re-establish an RRC connection;
  • the target base station is configured according to the RRC connection re-establishment request sent by the UE, and if a matching UE context is found,
  • the UE sends an RRC connection re-establishment message; the UE recovers the SRB1 according to the RRC connection re-establishment message, re-activates the security, includes integrity protection and encryption, performs measurement processing, and sends an RRC connection re-establishment to the original base station.
  • the RRC connection re-establishment process ends after the original base station receives the RRC connection re-establishment complete message.
  • the base station when the UE re-establishes a base station that does not have a matching UE context, the base station returns a reject RRC connection re-establishment message to the UE, which affects the success rate of the RRC connection re-establishment of the UE. Affect the user experience.
  • the RRC connection re-establishment of the Evolved NodeB (eNB) when the matching UE context cannot be found, according to the information carried in the re-establishment request message, an attempt is made to acquire the UE context from the failed cell, but this requires X2.
  • the interface limits the application scenario that is re-established across the base station. At the same time, the information about the interaction between the two eNBs is required to be re-established, and the re-establishment delay is added.
  • an object of the embodiments of the present invention is to provide a method, system, and apparatus for RRC connection re-establishment, which can ensure the success rate of re-establishment, reduce the re-establishment delay, and reduce the complexity of re-establishment implementation.
  • An embodiment of the present invention provides a method for RRC connection re-establishment, where the method includes: a current eNB selecting a candidate cell for a UE in a candidate UE list;
  • the eNB of the candidate cell When the eNB of the candidate cell receives the RRC connection reestablishment request of the UE, the eNB of the candidate cell performs an RRC connection reestablishment with the UE according to the context information of the UE.
  • the method further includes: the eNB predicts one or more UEs that will perform RRC connection re-establishment, and the selected one of the selected ones Or multiple UEs join the candidate UE list;
  • the one or more UEs that are predicted to have an RRC connection re-establishment include: if the reference signal receiving strength of any one of the UEs within the management range is lower than a preset threshold and/or the reference signal receiving quality is lower than a preset threshold, where the UE is a UE that will perform RRC connection re-establishment;
  • the UE is a UE that will re-establish the RRC connection;
  • the UE is the UE that will re-establish the RRC connection.
  • the selected candidate cell includes:
  • the neighboring cell configured by the cell is used as a candidate cell
  • the historical re-established cell to which the UE of the local cell is re-established is used as a candidate cell; or, the neighboring cell configured as the cell is obtained as a neighboring cell set; Obtaining, by the history information of the UE, the historical re-established cell of the UE in a specified time, as a historically reconstructed cell set of the UE; and acquiring an intersection or a union of the set of neighboring cells and the historical re-established cell set, a candidate cell of the UE;
  • one or more neighboring cells measured by the UE of the local cell are used as candidate cells.
  • the context information of each UE in the candidate UE list is respectively delivered to the eNB of the candidate cell, and the method further includes: the current eNB starts a timer.
  • the method further includes: if the timer reaches a specified time limit, and any one of the candidate UE lists does not have an RRC connection re-establishment, then the UE is An eNB of each candidate cell initiates a message for releasing context information of the UE;
  • the eNB of any candidate cell When the eNB of any candidate cell receives the message releasing the context information of the UE, the locally saved context information of the UE is released.
  • the eNB of the candidate cell when the eNB of the candidate cell receives the RRC connection reestablishment request of the UE, the eNB of the candidate cell performs RRC connection re-establishment with the UE according to the context information of the UE, including:
  • the eNB of any candidate cell receives the RRC connection reestablishment request of the UE, the eNB of the candidate cell restores the RRC connection by using the context information of the UE;
  • the eNB of the candidate cell sends a message for releasing the context information of the UE to the current eNB of the UE;
  • the current eNB of the UE releases the locally saved context information of the UE according to the received message releasing the context information of the UE; and the current eNB of the UE removes the established cell to the UE.
  • the eNB of the other candidate cells sends a message for releasing the context information of the UE.
  • the embodiment of the present invention further provides an eNB, where the eNB includes: a management module and a transceiver module;
  • a management module configured to select a candidate cell for the UE in the candidate UE list, and send the context information of the UE in the candidate UE list to the transceiver module;
  • the transceiver module is configured to send the context information of the UE sent by the management module.
  • the management module is specifically configured to: predict one or more UEs that may perform RRC connection re-establishment, and add the selected one or more UEs to the candidate UE list; wherein, the prediction One or more UEs that have an RRC connection re-establishment occur, including: if the reference signal reception strength of any one of the UEs within the management range is lower than a preset threshold and/or the reference signal reception quality is lower than a preset threshold
  • the UE is a UE that may perform RRC connection re-establishment;
  • the UE is a UE that will re-establish the RRC connection
  • the UE is the UE that will re-establish the RRC connection.
  • the management module is specifically configured to use a neighboring cell configured by the local cell as a candidate cell;
  • the historical re-established cell to which the UE of the local cell is re-established is used as the candidate cell; or, all the neighboring cells configured as the cell are obtained as the neighboring cell set; and according to the historical information of each UE in the candidate UE list.
  • the eNB further includes: a timing module, configured to start a timer according to control of the transceiver module;
  • the transceiver module is further configured to: when the context information of each UE in the candidate UE list is sent, the control timing module starts a timer.
  • the management module is further configured to detect a timer of the timing module in real time, and if the timer reaches a specified time limit, and any one of the candidate UE lists does not have an RRC connection re-establishment, the release is initiated.
  • Context information of the UE is further provided.
  • the eNB includes: a control module, configured to perform RRC connection re-establishment according to the received context information of the UE.
  • the eNB further includes: a transceiver module, configured to send the received RRC connection reestablishment request to the control module;
  • control module is further configured to: if the RRC connection reestablishment request sent by the transceiver module is received, recover the RRC connection by using the context information of the UE; and send the context information that releases the UE.
  • the embodiment of the present invention further provides a system for RRC connection re-establishment, where the system includes: an eNB of a current eNB and one or more candidate cells;
  • the current eNB is the eNB described in the foregoing solution.
  • the eNB of the candidate cell is the eNB described in the foregoing scheme.
  • the RRC connection re-establishment method, the system and the device provided by the embodiment of the present invention establish a candidate UE list in the current eNB, select a candidate cell for each UE in the candidate UE list, and respectively select each UE in the candidate UE list.
  • Context information which is delivered to the eNB of the corresponding candidate cell; when the eNB of the candidate cell receives the RRC connection reestablishment request of the UE, the eNB of the candidate cell performs with the UE according to the context information of the UE.
  • the RRC connection is re-established.
  • the re-establishment is performed using the prepared context, which improves the re-establishment success rate, reduces the re-establishment delay, and reduces the re-establishment implementation complexity.
  • FIG. 1 is a schematic flowchart of a method for reestablishing an RRC connection according to the present invention
  • FIG. 2 is a schematic structural diagram of a system for reestablishing an RRC connection according to the present invention
  • Embodiment 3 is a schematic flow chart of Embodiment 1;
  • Figure 5 is a schematic flow chart of the third embodiment
  • Embodiment 6 is a schematic flow chart of Embodiment 4.
  • FIG. 7 is a schematic flow chart of Embodiment 5; 8 is a schematic flow chart of Embodiment 6;
  • the current eNB selects a candidate cell for the UE in the candidate user equipment UE list; respectively, the context information of the UE in the candidate UE list is transmitted to the eNB of the candidate cell;
  • the eNB of the candidate cell receives the RRC connection reestablishment request of the UE, the eNB of the candidate cell performs RRC connection re-establishment with the UE according to the context information of the UE.
  • the method for reestablishing the RRC connection proposed by the embodiment of the present invention, as shown in FIG. 1, includes the following steps:
  • Step 101 The current eNB selects a candidate cell for the UE in the candidate UE list.
  • the method includes: the eNB predicts one or more UEs that may perform RRC connection re-establishment, and the one or more UEs to be selected Join the candidate UE list.
  • the one or more UEs that are predicted to have an RRC connection re-establishment include: the eNB acquires a reference signal receiving strength and a reference signal receiving quality of all UEs within its own management range, if the reference signal receiving strength of any one UE is lower than a preset If the threshold value and/or the reference signal reception quality is lower than a preset threshold, the UE is a UE that may perform RRC connection re-establishment;
  • HARQ hybrid automatic repeat request
  • the UE is a UE that may perform RRC connection re-establishment; wherein, the data transmission information includes Packet loss rate, error bit rate, etc.
  • the above step 101 can be a periodic operation, for example, every three hours according to the actual situation. It can be executed once; it can also be executed according to the operation of the manager.
  • the selected candidate cell includes: a neighboring cell configured by the current cell as a candidate cell; or a historical re-established cell to which the UE of the current cell is re-established as a candidate cell; or the eNB acquires the cell configuration a neighboring cell, as a set of neighboring cells; and the eNB acquires, according to the historical information of the UE, a historical re-established cell of the UE in a specified time, as a historically reconstructed cell set of the UE; The history re-establishes a set of cells to take an intersection or a union to obtain a candidate cell of the UE;
  • one or more neighboring cells measured by the UE of the current cell are used as candidate cells.
  • the historical information of the UE is some information recorded by the behavior of the UE managed by the eNB.
  • Step 102 The context information of the UE in the candidate UE list is respectively delivered to the eNB of the candidate cell.
  • the context information of the UE is the information specified in the prior art, and the acquiring method is the prior art, and details are not described herein.
  • the sending may be that the eNB sends the context information of the UE by using the UE context information establishment procedure or the handover preparation process for the eNB of each candidate cell.
  • the eNB when the eNB completes the operation of transmitting the context information of the corresponding UE, the eNB starts a timer, and if the timer reaches a specified time limit, and any one of the candidate UE lists does not have an RRC connection re-establishment, And transmitting, to the eNB of each candidate cell of the UE, a UE context information release message, where the eNB of the candidate cell releases the context information of the UE.
  • the determining method of the RRC connection re-establishment of the UE in the candidate UE list is: whether the RRC connection re-establishment request message of the UE is received, and if received, the UE performs RRC connection re-establishment. .
  • the interaction message carrying the UE context information and the content carried by the message include: a UE context establishment request/UE context establishment response, and a handover request/handover request response.
  • Step 103 When an eNB of the candidate cell receives an RRC connection reestablishment request of the UE, the eNB of the candidate cell performs, according to the context information of the UE, with the UE. The C connection is re-established.
  • Step a If the eNB of any candidate cell receives the RRC connection reestablishment request sent by the UE, the eNB of the candidate cell recovers the RRC connection by using the context information of the UE.
  • Step b The eNB of the candidate cell sends the context information for releasing the UE to the original eNB of the UE.
  • Step c The original eNB releases the locally saved context information of the UE according to the received release context information of the UE; and the original eNB sends the UE other candidate cells than the re-established cell to the UE. The eNB sends a message that releases the context information of the UE.
  • the candidate cell eNB that receives the message releasing the context information of the UE releases the locally saved context information of the UE according to the message.
  • the RRC connection re-establishment system of the embodiment of the present invention includes: a current eNB 21 and an eNB 22 of one or more candidate cells;
  • the current eNB 21 is configured to select a candidate cell for each UE in the candidate UE list, and send the context information of each UE in the candidate UE list to the eNB of the corresponding candidate cell, and the eNB 22 of the candidate cell. And performing RRC connection re-establishment with the UE according to the received context information of the UE.
  • the current eNB 21 includes: a management module and a transceiver module;
  • a management module configured to select a candidate cell for the UE in the candidate UE list, and send the context information of the UE in the candidate UE list to the transceiver module;
  • transceiver module configured to send context information of each UE sent by the management module.
  • the management module is specifically configured to predict one or more UEs that may have an RRC connection re-establishment, and add the selected one or more UEs to the candidate UE list.
  • the management module is specifically configured to obtain a reference signal receiving strength and a reference signal receiving quality of all UEs in the management range, if the reference signal receiving strength of any one UE is lower than a preset threshold and/or the reference signal receiving quality is low.
  • the preset threshold is used by the UE, where the UE is RRC connection re-established; And/or, obtaining the HARQ of all the UEs, if the number of HARQ failures of any one of the UEs is higher than a preset threshold, the UE is a UE that may perform RRC connection re-establishment;
  • the data transmission information of all the UEs is obtained. If the data transmission information error rate of any one of the UEs is higher than a preset threshold, the UE is a UE that will perform RRC connection re-establishment.
  • the management module is specifically configured to use the neighboring cell configured by the local cell as a candidate cell; or the historical re-established cell to which the UE of the local cell is re-established as a candidate cell; or obtain the neighboring cell configured for the cell And as a set of neighboring cells; and acquiring, according to historical information of each UE in the candidate UE list, a historical re-established cell of each UE in a specified time, as a historically reconstructed cell set of each UE; for the neighboring cell set and each UE The historical re-establishment cell set respectively takes the intersection or the union to obtain one or more candidate cells of each UE;
  • the current eNB further includes: a timing module, configured to start a timer according to the control of the transceiver module; and correspondingly, the transceiver module is further configured to: when the context information of each UE in the candidate UE list is sent, the control timing module starts Timer.
  • the management module is further configured to detect a timer of the timing module in real time, and if the timer reaches a specified time limit, and any one of the candidate UE lists does not have an RRC connection re-establishment, the context information of the UE is released. Message.
  • the management module may be hardware such as a CPU or a DSP; the transceiver module may be a radio frequency component composed of an antenna or the like; and the timing module may include a timer.
  • the eNB 22 of the candidate cell includes: a control module, configured to perform RRC connection re-establishment according to the received context information of the UE.
  • the eNB 22 of the candidate cell further includes: a transceiver module, configured to send the received RRC connection reestablishment request to the control module; and correspondingly, the control module is further configured to: if the RRC connection reestablishment request sent by the transceiver module is received And recovering the RRC connection by using the context information of the UE; and sending the context information that releases the UE.
  • the control module may be hardware such as a CPU or a DSP; the transceiver module may be an antenna, etc.
  • FIG. 3 The overall process of the embodiment of the present invention is illustrated in FIG. 3.
  • Step 301 The eNB selects candidate UEs that may be re-established according to the radio link information, and establishes a candidate UE list.
  • Step 302 The eNB selects a candidate cell for each UE in the candidate UE list according to the neighboring area configuration information managed by the eNB and the historical information of the UE.
  • Step 303 The eNB sends the context information of each UE in the candidate UE list to the eNB of the corresponding candidate cell.
  • the context information of the UE is as follows:
  • Step 306 When the eNB of any candidate cell receives the RRC connection re-establishment request sent by the UE, the eNB of the candidate cell recovers the RRC connection of the UE by using the context information of the UE.
  • Step 305 The eNB of the candidate cell notifies the eNB to release context information of the UE.
  • Step 306 After releasing the context information of the UE sent by the eNB of the candidate cell, the eNB sends, to the eNB of the candidate cell other than the eNB of the candidate cell, the release of the UE.
  • the message of the context information After releasing the context information of the UE sent by the eNB of the candidate cell, the eNB sends, to the eNB of the candidate cell other than the eNB of the candidate cell, the release of the UE. The message of the context information.
  • the eNB of the candidate cell releases the locally saved context information of the UE according to the message for releasing the context information of the UE.
  • the re-establishment processing method based on the S1 interface is as shown in FIG. 4.
  • Step 401 The source eNB selects one or more UE establishment candidate UE lists that may be re-established according to the radio channel state information, and selects, for each UE in the candidate UE list, according to the neighbor configuration information and the UE history information. Candidate cell.
  • Step 402 The source eNB separately sends a context setup request message to the MME, requesting that the target eNB of the candidate cell prepare a context for the selected re-establishment candidate UE.
  • the context establishment request message is as shown in Table 1, and includes an RRC context, security information, E-RAB information, and the like.
  • Step 403 After receiving the context setup request message, the MME sends a context setup request message to the target eNB of each candidate cell.
  • Step 404 After receiving the context establishment request message, the target eNB of each candidate cell returns a context establishment response to the MME.
  • Step 405 After receiving the context setup response returned by the target eNB of each candidate cell, the MME sends a context establishment response to the source eNB.
  • Step 406 The UE sends an RRC connection re-establishment request to the target eNB 1.
  • Step 407 The target eNB 1 matches the context information of the UE, sends an RRC connection re-establishment to the UE, and restores the SRB.
  • Step 408 The UE returns an RRC connection re-establishment completion to the target eNB-1, and indicates Restore SRB successfully.
  • Step 409 The target eNB-1 sends a context information release command of the UE to the MME.
  • Step 410 The MME sends a context release command of the UE to a source eNB.
  • Step 411 After releasing the context information of the UE, the source eNB returns a UE context release completion response to the MME.
  • Step 412 The MME sends a context release completion response to the target eNB that successfully re-establishes the UE, instructing the source eNB to release the UE context result.
  • Step 413 The source eNB sends a UE context release request to the MME, requesting to release context information in the eNB of the other candidate cells of the UE except the target eNB1.
  • Step 414 The MME sends a UE context release command to the target eNBs of the candidate cells other than the target eNB that successfully re-established.
  • Step 415 After releasing the UE context, the target eNB of each candidate cell separately returns a Context Release Complete response of the UE to the MME.
  • Step 416 The MME returns a context release result to the source eNB.
  • the re-establishment processing method based on the X2 interface is as shown in FIG. 5.
  • Step 501 The source eNB selects a candidate UE that is likely to be re-established to form a candidate UE list according to the radio channel status information, and selects a candidate cell of each UE in the candidate UE list according to the neighboring area configuration information and the UE history information.
  • Step 502 The source eNB sends a context establishment request message to the target eNB of the candidate cell by sending a handover request.
  • the context setup request message establishes a context for the selected re-establishment candidate UE in the selected target eNB of the candidate cell.
  • the UE context setup request message sent through the X2 interface is as shown in Table 2, including RRC context information, security information, and E-RAB information, etc.:
  • Table 2 Step 503 After the target eNB of each candidate cell establishes the context message of the UE, return a context message setup response to the source eNB by using the handover request response information.
  • Step 504 When the UE re-establishes, the UE sends an RRC connection re-establishment procedure to the target eNB 1.
  • Step 505 After the target eNB 1 matches the context information of the UE, the target eNB 1 sends an RRC connection re-establishment to the UE and restores the SRB.
  • Step 506 The UE returns an RRC connection re-establishment completion to the target eNB 1.
  • Step 507 The target eNB 1 sends a context release indication to the source eNB.
  • the context release indication includes releasing the context of the UE at the source eNB.
  • Step 508 The source eNB sends a UE context release message to the target eNB of the other candidate cells of the UE other than the target eNB1.
  • the re-establishment processing method 2 based on the S1 interface is as shown in FIG. 6.
  • Step 601 The source eNB selects a number of UE establishment candidate UE lists that may be re-established according to the radio channel status information, and selects candidate cells of each UE in the candidate UE list according to the neighboring area configuration information and the UE history information.
  • Step 602 The source eNB sends a handover request message to the MME, to request to establish context information of the corresponding UE in the target eNB of the candidate cell.
  • Step 603 After receiving the handover request message from the source eNB, the MME sends a handover request message to the target eNB of each candidate cell, requesting to establish the context information of the UE at the target eNB.
  • Step 604 After receiving the handover request message, the target eNB of each candidate cell establishes the context information of the UE, and returns a response message of the handover request to the MME.
  • Step 605 After receiving the handover request response message replied by each target eNB, the MME sends a handover command to the source eNB to indicate that the context information of the UE is successfully established by the target eNB.
  • Step 606 When the UE initiates an RRC connection re-establishment request to the target eNB 1, perform RRC. The connection re-establishment process.
  • Step 607 After the target eNB 1 and the UE C are re-established successfully, the target eNB 1 performs a UE context release procedure.
  • Embodiment 5 After the target eNB 1 and the UE C are re-established successfully, the target eNB 1 performs a UE context release procedure.
  • the re-establishment processing method based on the X2 interface is as shown in FIG. 7.
  • Step 701 The source eNB selects a number of UE establishment candidate UE lists that may be re-established according to the radio channel status information, and selects candidate cells of each UE in the candidate UE list according to the neighboring area configuration information and the UE history information.
  • Step 702 The source eNB sends a handover request message to the target eNB of the candidate cell, requesting to establish the context information of the UE in the candidate cell.
  • Step 703 After receiving the handover request message, the target eNB of each candidate cell establishes the context information of the UE in the target eNB, and successfully returns a handover request response message to the source eNB respectively after successful;
  • Step 704 When the UE initiates an RRC connection re-establishment request to the target eNB 1, the RRC connection re-establishment procedure is performed.
  • Step 705 After the target eNB 1 and the UE RRC connection re-establishment succeed, the target eNB 1 performs a UE context release procedure.
  • Waiting for the UE to re-establish the timeout processing based on the S1 interface is as shown in FIG. 8.
  • Step 801 The re-establishment candidate UE does not re-establish to the candidate cell within a specified time, and the eNB sends a context release request to the MME to indicate that the context prepared by the target eNB of each candidate cell is released.
  • Step 802 The MME sends a context release command to the target eNB of each candidate cell, respectively, indicating that the prepared context is released.
  • Step 803 After the target eNB of each candidate cell releases the UE context, return to the MME respectively.
  • the UE context release is completed, indicating that the UE context release is complete.
  • Step 804 The MME returns a UE context release response to the source eNB, respectively, indicating a context release result prepared by the target eNB of each candidate cell.
  • the UE When the current eNB is the source eNB and the eNB of the candidate cell is the target eNB, the UE re-establishes the timeout processing based on the X2 interface, as shown in FIG. 9.
  • Step 901 Re-establishing the candidate UE in the specified time is not re-established to the candidate cell, and the source eNB waits for the UE to re-establish the timeout;
  • Step 902 The target eNB, the source eNB sends a context release request to the target eNB of each candidate cell, respectively, indicating that the prepared context is released.
  • Step 903 After releasing the UE context, the target eNB of each candidate cell returns a UE context release response to the source eNB, indicating the prepared UE context release result.

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Abstract

本发明公开了一种无线资源控制(RRC)连接重建立的方法、系统及装置,该方法包括:当前演进型基站(eNB)为候选用户设备(UE)列表中的UE选定候选小区;分别将所述候选UE列表中UE的上下文信息,传递至对应的所述候选小区的eNB;当所述候选小区的eNB接收到所述UE的RRC连接重建请求时,所述候选小区的eNB根据所述UE的上下文信息,与所述UE进行RRC连接重建立。

Description

一种无线资源控制连接重建立的方法、 系统及装置 技术领域
本发明涉及长期演进 ( LTE, Long Term Evolution )领域的控制管理技术, 尤其涉及一种无线资源控制 (RRC, Radio Resource Control )连接重建立的方 法、 系统及装置。 背景技术
用户设备(UE, User Equipment ) 的接入层安全激活后, 一旦检测到无线 链路失败、 或切换失败、 或来自 E-UTRAN的移动性失败、 或完整性检查失败、 或 RRC连接重配失败,则所述 UE向目标基站发起 RRC连接重建立请求流程, 以便重建立 RRC连接; 所述目标基站根据所述 UE发来的 RRC连接重建立请 求, 如果找到匹配的 UE上下文, 则向所述 UE发送 RRC连接重建立消息; 所 述 UE根据所述 RRC连接重建立消息, 恢复 SRB1并且重新激活安全, 包括完 整性保护和加密,进行测量处理, 并向所述原基站发送 RRC连接重建立完成消 息; 所述原基站收到所述 RRC连接重建立完成消息后, RRC连接重建立流程 结束。
但是, 使用上述方案, 当 UE重建立到不存在匹配的 UE上下文的基站时, 所述基站会向 UE返回拒绝 RRC连接重建立消息,这样就影响了 UE进行 RRC 连接重建立的成功率, 从而影响用户体验。 对于跨演进型基站 (eNB, Evolved NodeB ) 的 RRC连接重建立, 在无法找到匹配的 UE上下文时, 根据重建立请 求消息携带的信息, 尝试从发生失败的小区获取 UE上下文, 但这要求存在 X2 接口, 限制了跨基站重建立的应用场景, 同时需要两个 eNB之间交互相关信息 才能进行重建立, 增加了重建立时延。
可见, 现有技术的 RRC连接重建立中, 无法保证重建立的成功率、 以及无 法减少重建立时延, 并且重建立实现的复杂度较高。 发明内容
有鉴于此,本发明实施例的目的在于提供一种 RRC连接重建立的方法、 系 统及装置, 能保证重建立的成功率、 以及减少重建立时延, 并且减小重建立实 现的复杂度。
本发明实施例提供了一种 RRC连接重建立的方法, 该方法包括: 当前 eNB为候选 UE列表中的 UE选定候选小区;
分别将所述候选 UE列表中 UE的上下文信息, 传递至所述候选小区的 eNB;
当所述候选小区的 eNB收到所述 UE的 RRC连接重建请求时, 所述候 选小区的 eNB根据所述 UE的上下文信息, 与所述 UE进行 RRC连接重建 立。
上述方案中,所述 eNB为候选用户设备 UE列表中的 UE选定候选小区 之前,该方法还包括: eNB预测出会发生 RRC连接重建立的一个或多个 UE, 将选出的所述一个或多个 UE加入所述候选 UE列表;
其中, 所述预测出会发生 RRC连接重建立的一个或多个 UE, 包括: 如果自身管理范围内任意一个 UE的参考信号接收强度低于预设门限值 和 /或参考信号接收质量低于预设门限值, 则所述 UE为会发生 RRC连接重 建立的 UE;
和 /或, 如果自身管理范围内任意一个 UE 的混合自动重传请求 HARQ 失败次数高于预设门限, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或,如果自身管理范围内任意一个 UE的数据传输信息错误率高于预 设门限, 则所述 UE为会发生 RRC连接重建立的 UE。
上述方案中, 所述选定候选小区, 包括:
将本小区配置的邻小区作为候选小区;
或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 获取为本小区配置的邻小区, 作为邻小区集合; 并且根据所述 UE的历史信息, 获取在指定时间内所述 UE的历史重建立小区, 作为所述 UE的历史重建小区集合; 对所述邻小区集合和所述历史重建立小区集合取 交集或并集, 得到所述 UE的候选小区;
或者, 将本小区的所述 UE测量到的一个或多个邻小区作为候选小区。 上述方案中, 所述分别将候选 UE列表中各个 UE的上下文信息, 传递 至所述候选小区的 eNB, 该方法还包括: 所述当前 eNB启动定时器。
上述方案中, 所述当前 eNB启动定时器之后, 所述方法还包括: 若定时器达到指定时限、 且所述候选 UE列表中有任意一个 UE未发生 RRC连接重建立, 则向所述 UE的各个候选小区的 eNB, 发起释放所述 UE 的上下文信息的消息;
当任意一个候选小区的 eNB收到释放所述 UE的上下文信息的消息时, 释放本地保存的所述 UE的上下文信息。
上述方案中, 当所述候选小区的 eNB收到所述 UE的 RRC连接重建请 求时, 所述候选小区的 eNB根据所述 UE的上下文信息, 与所述 UE进行 RRC连接重建立, 包括:
若任意一个候选小区的 eNB接收到所述 UE的 RRC连接重建请求, 则 所述候选小区的 eNB使用所述 UE的上下文信息恢复 RRC连接;
所述候选小区的 eNB向所述 UE的当前 eNB发送释放所述 UE的上下 文信息的消息;
所述 UE的当前 eNB根据接收到的释放所述 UE的上下文信息的消息, 释放本地保存的所述 UE的上下文信息; 并且, 所述 UE的当前 eNB向所述 UE除重建立到的小区之外的其它候选小区的 eNB, 发送释放所述 UE的上 下文信息的消息。
本发明实施例还提供一种 eNB, 所述 eNB包括: 管理模块和收发模块; 其中,
管理模块, 用于为候选 UE列表中的 UE选定候选小区; 将候选 UE列 表中 UE的上下文信息发送给收发模块; 收发模块, 用于将管理模块发来的 UE的上下文信息发出。
上述方案中, 所述管理模块, 具体用于预测出会发生 RRC连接重建立 的一个或多个 UE, 将选出的所述一个或多个 UE加入所述候选 UE列表; 其中, 所述预测出会发生 RRC连接重建立的一个或多个 UE, 包括: 如果自身管理范围内任意一个 UE的参考信号接收强度低于预设门限值 和 /或参考信号接收质量低于预设门限值, 则所述 UE为会发生 RRC连接重 建立的 UE;
和 /或, 如果自身管理范围内任意一个 UE的 HARQ失败次数高于预设 门限, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或,如果自身管理范围内任意一个 UE的数据传输信息错误率高于预 设门限, 则所述 UE为会发生 RRC连接重建立的 UE。
上述方案中, 所述管理模块, 具体用于将本小区配置的邻小区作为候选 小区;
或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 获取为本小区配置的所有邻小区, 作为邻小区集合; 并且根据候 选 UE列表中的各个 UE的历史信息, 获取在指定时间内各个 UE的历史重 建立小区, 作为各个 UE 的历史重建小区集合; 对所述邻小区集合和各个 UE的历史重建立小区集合分别取交集或并集, 得到各个 UE的一个或多个 候选小区;
或者, 将本小区的所述 UE测量到的一个或多个邻小区作为候选小区。 上述方案中, 所述 eNB还包括: 定时模块, 用于根据收发模块的控制, 启动定时器;
相应的, 所述收发模块, 还用于将候选 UE列表中各个 UE的上下文信 息发出时, 控制定时模块启动定时器。
上述方案中, 所述管理模块, 还用于实时检测定时模块的定时器, 若定 时器达到指定时限、且所述候选 UE列表中有任意一个 UE未发生 RRC连接 重建立, 则发起释放所述 UE的上下文信息。 本发明实施例还提供了一种 eNB, 所述 eNB 包括: 控制模块, 用于根 据接收到的 UE的上下文信息进行 RRC连接重建立。
上述方案中, 所述 eNB还包括: 收发模块, 用于将接收到的 RRC连接 重建请求发送给控制模块;
相应的, 所述控制模块, 还用于若收到收发模块发来的 RRC连接重建 请求, 则利用所述 UE的上下文信息恢复 RRC连接; 并发送释放所述 UE的 上下文信息。
本发明实施例还提供了一种 RRC连接重建立的系统, 所述系统包括: 当 前 eNB和一个或多个候选小区的 eNB; 其中,
所述当前 eNB为上述方案中所述的 eNB;
所述候选小区的 eNB为上述方案中所述的 eNB。
本发明实施例所提供的 RRC连接重建立的方法、 系统及装置,在当前 eNB 建立候选 UE列表, 为所述候选 UE列表中的各个 UE选定候选小区,分别将候 选 UE列表中各个 UE的上下文信息, 传递至对应的候选小区的 eNB; 当所述 候选小区的 eNB收到所述 UE的 RRC连接重建请求时,所述候选小区的 eNB 根据所述 UE的上下文信息, 与所述 UE进行 RRC连接重建立。 如此, 能够当 所述 UE重建立到所述重建立候选小区时使用准备的上下文进行重建立, 提高 了重建立成功率, 减少了重建立时延, 降低了重建立实现复杂度。 附图说明
图 1为本发明 RRC连接重建立的方法流程示意图;
图 2为本发明 RRC连接重建立的系统组成结构示意图;
图 3为实施例一流程示意图;
图 4为实施例二流程示意图;
图 5为实施例三流程示意图;
图 6为实施例四流程示意图;
图 7为实施例五流程示意图; 图 8为实施例六流程示意图;
图 9为实施例七流程示意图。 具体实施方式
本发明实施例的基本思想是: 当前 eNB 为候选用户设备 UE 列表中的 UE选定候选小区; 分别将所述候选 UE列表中 UE的上下文信息, 传递至 所述候选小区的 eNB; 当所述候选小区的 eNB收到所述 UE的 RRC连接重 建请求时, 所述候选小区的 eNB根据所述 UE的上下文信息, 与所述 UE进 行 RRC连接重建立。
下面结合附图及具体实施例对本发明再作进一步详细的说明。
本发明实施例提出的 RRC连接重建立的方法, 如图 1所示, 包括以下步 骤:
步骤 101 : 当前 eNB为候选 UE列表中的 UE选定候选小区。
这里,所述当前 eNB为候选 UE列表中的 UE选定候选小区之前,包括: 所述 eNB预测出会发生 RRC连接重建立的一个或多个 UE, 将选出的所述 一个或多个 UE加入所述候选 UE列表。
所述预测出会发生 RRC连接重建立的一个或多个 UE包括: eNB获取 自身管理范围内所有 UE的参考信号接收强度及参考信号接收质量, 如果任 意一个 UE 的参考信号接收强度低于预设门限值和 /或参考信号接收质量低 于预设门限值, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或, 获取所有 UE的混合自动重传请求 (HARQ, Hybrid Automatic Repeat request ) , 如果任意一个 UE的 HARQ失败次数高于预设门限, 则所 述 UE为会发生 RRC连接重建立的 UE;
和 /或, 获取所有 UE的数据传输信息, 如果任意一个 UE的数据传输信 息错误率高于预设门限,则所述 UE为会发生 RRC连接重建立的 UE;其中, 所述数据传输信息包括丟包率、 错误比特率等。
上述步骤 101可以为周期性操作, 比如根据实际情况预设为每三小时执 行一次; 也可以为根据管理人员的操作开始执行。
所述选定候选小区包括: 将本小区配置的邻小区作为候选小区; 或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 所述 eNB 获取为本小区配置的邻小区, 作为邻小区集合; 并且 eNB根据所述 UE的历史信息, 获取在指定时间内所述 UE的历史重建立小 区, 作为所述 UE的历史重建小区集合; 对所述邻小区集合和所述历史重建 立小区集合取交集或并集, 得到所述 UE的候选小区;
或者,将本小区的所述 UE测量到的一个或多个相邻小区作为候选小区。 其中,所述 UE的历史信息为 eNB管理的 UE发生的行为而记录的一些 信息。
步骤 102: 分别将所述候选 UE列表中 UE的上下文信息, 传递至所述 候选小区的 eNB。
这里, 所述 UE的上下文信息为现有技术中规定的信息, 其获取方法为 现有技术, 这里不做赘述。
所述发送可以为所述 eNB通过 UE上下文信息建立流程、或切换准备流 程为各个候选小区的 eNB发送 UE的上下文信息。
另外, 所述 eNB完成发送对应 UE的上下文信息的操作时, 所述 eNB 启动定时器, 若所述定时器达到指定时限、 且所述候选 UE列表中有任意一 个 UE未发生 RRC连接重建立, 则向所述 UE的各个候选小区的 eNB,发送 UE上下文信息释放消息,所述候选小区的 eNB释放所述 UE的上下文信息。
其中,所述候选 UE列表中有任意一个 UE未发生 RRC连接重建立的判 定方法为: 是否接收到所述 UE的 RRC连接重建立请求消息, 若收到, 则 所述 UE发生 RRC连接重建立。
所述传递 UE上下文信息的交互消息及消息携带的内容, 包括: UE上 下文建立请求 /UE上下文建立响应, 以及切换请求 /切换请求应答。
步骤 103 : 当所述候选小区的 eNB接收到所述 UE的 RRC连接重建请 求时, 所述候选小区的 eNB根据所述 UE的上下文信息, 与所述 UE进行 C连接重建立。
具体为:
步骤 a: 若任意一个候选小区的 eNB接收到 UE发送的 RRC连接重建 请求, 则所述候选小区的 eNB使用所述 UE的上下文信息恢复 RRC连接。
步骤 b:所述候选小区的 eNB向所述 UE的原 eNB发送释放所述 UE的 上下文信息。
步骤 c: 原 eNB根据接收到的释放所述 UE的上下文信息, 释放本地保 存的所述 UE的上下文信息; 并且, 所述原 eNB向所述 UE除发生重建立的 小区之外的其它候选小区的 eNB, 发送释放所述 UE的上下文信息的消息。
上述步骤 c完成后, 所述接收到释放所述 UE的上下文信息的消息的候 选小区 eNB, 根据所述消息释放本地保存的所述 UE的上下文信息。
本发明实施例的 RRC连接重建立的系统,如图 2所示, 包括: 当前 eNB21 和一个或多个候选小区的 eNB 22; 其中,
所述当前 eNB21, 用于为候选 UE列表中的各个 UE选定候选小区; 分 别将候选 UE列表中各个 UE的上下文信息,发送至对应的候选小区的 eNB; 所述候选小区的 eNB 22, 用于根据接收到的 UE的上下文信息, 与 UE 进行 RRC连接重建立。
所述当前 eNB 21包括: 管理模块和收发模块; 其中,
管理模块,用于为所述候选 UE列表中的 UE选定候选小区; 将候选 UE 列表中 UE的上下文信息发送给收发模块;
收发模块, 用于将管理模块发来的各个 UE的上下文信息发出。
所述管理模块, 具体用于预测出会发生 RRC连接重建立的一个或多个 UE, 将选出的所述一个或多个 UE加入所述候选 UE列表。
所述管理模块, 具体用于获取自身管理范围内所有 UE的参考信号接收 强度及参考信号接收质量, 如果任意一个 UE的参考信号接收强度低于预设 门限值和 /或参考信号接收质量低于预设门限值, 则所述 UE为会发生 RRC 连接重建立的 UE; 和 /或, 获取所有 UE的 HARQ, 如果任意一个 UE的 HARQ失败次数 高于预设门限, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或, 获取所有 UE的数据传输信息, 如果任意一个 UE的数据传输信 息错误率高于预设门限, 则所述 UE为会发生 RRC连接重建立的 UE。
所述管理模块, 具体用于将本小区配置的邻小区作为候选小区; 或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 获取为本小区配置的邻小区, 作为邻小区集合; 并且根据候选 UE列表中的各个 UE的历史信息, 获取在指定时间内各个 UE的历史重建 立小区, 作为各个 UE的历史重建小区集合; 对所述邻小区集合和各个 UE 的历史重建立小区集合分别取交集或并集, 得到各个 UE的一个或多个候选 小区;
或者, 将本小区的所述 UE测量到的一个或多个邻小区作为候选小区。 所述当前 eNB还包括: 定时模块, 用于根据收发模块的控制, 启动定时 器; 相应的, 所述收发模块, 还用于将候选 UE列表中各个 UE的上下文信 息发出时, 控制定时模块启动定时器。
所述管理模块, 还用于实时检测定时模块的定时器, 若定时器达到指定 时限、且所述候选 UE列表中有任意一个 UE未发生 RRC连接重建立, 则发 起释放所述 UE的上下文信息的消息。
其中, 所述管理模块可以为 CPU或 DSP等硬件; 所述收发模块可以为 天线等组成的射频部分; 定时模块可以包括定时器。
所述候选小区的 eNB22包括: 控制模块, 用于根据接收到的 UE的上下 文信息进行 RRC连接重建立。
所述候选小区的 eNB22还包括: 收发模块, 用于将接收到的 RRC连接 重建请求发送给控制模块; 相应的, 所述控制模块, 还用于若收到收发模块 发来的 RRC连接重建请求, 则利用所述 UE的上下文信息恢复 RRC连接; 并发送释放所述 UE的上下文信息。
所述控制模块可以为 CPU或 DSP等硬件; 所述收发模块可以为天线等 组成的射频部分。 实施例一、
本发明实施例的总体流程处理如图 3所示。
步骤 301 : eNB根据无线链路信息挑选出可能发生重建立的候选 UE, 建立候选 UE列表。
步骤 302: 所述 eNB根据自身管理的邻区配置信息和 UE的历史信息, 为所述候选 UE列表中的各个 UE选定候选小区。
步骤 303 : 所述 eNB分别将候选 UE列表中各个 UE的上下文信息, 发 送至对应的候选小区的 eNB。
所述 UE的上下文信息如下表所示:
Figure imgf000012_0001
表 1
步骤 304: 当任意一个候选小区的 eNB收到 UE发来的 RRC连接重建 立请求时, 则所述候选小区的 eNB使用所述 UE的上下文信息恢复所述 UE 的 RRC连接。 步骤 305: 所述候选小区的 eNB通知所述 eNB释放所述 UE的上下文 信息。
步骤 306: 所述 eNB根据所述候选小区的 eNB发来的释放所述 UE的 上下文信息后,向所述 UE的除所述候选小区的 eNB之外的其他候选小区的 eNB发送释放所述 UE的上下文信息的消息。
进一步的, 上述步骤 306完成后, 所述候选小区的 eNB根据所述释放 所述 UE的上下文信息的消息, 释放本地保存的所述 UE的上下文信息。
实施例二、
当所述当前 eNB为源 eNB, 候选小区的 eNB为目标 eNB时, 基于 S1 接口的重建立处理方法一如图 4所示。
步骤 401 :源 eNB根据无线信道状态信息挑选出可能发生重建立的一个 或多个 UE建立候选 UE列表, 并根据邻区配置信息和 UE历史信息, 为所 述候选 UE列表中的各个 UE选定候选小区。
步骤 402: 源 eNB分别向 MME发送上下文建立请求消息, 请求在候选 小区的目标 eNB为挑选出的重建立候选 UE准备上下文。
这里, 所述上下文建立请求消息如表 1所示, 包括 RRC上下文、 安全 信息和 E-RAB信息等。
步骤 403 : 所述 MME收到上下文建立请求消息后, 分别向各候选小区 的目标 eNB发送上下文建立请求消息。
步骤 404: 各个候选小区的目标 eNB收到上下文建立请求消息后, 分别 向 MME回上下文建立响应。
步骤 405: 所述 MME收到各个候选小区的目标 eNB返回的上下文建立 响应后, 向源 eNB发送上下文建立响应。
步骤 406: UE向目标 eNB 1发送 RRC连接重建立请求。
步骤 407: 所述目标 eNB 1 匹配到所述 UE的上下文信息, 向所述 UE 发送 RRC连接重建立并恢复 SRB。
步骤 408: 所述 UE向目标 eNB-1返回 RRC连接重建立完成, 并指示 恢复 SRB成功。
步骤 409: 所述目标 eNB-1向 MME发送所述 UE的上下文信息释放命 令。
步骤 410: 所述 MME向源 eNB发送所述 UE的上下文释放命令。
步骤 411 : 所述源 eNB释放所述 UE的上下文信息后, 向 MME回 UE 上下文释放完成响应。
步骤 412: MME向 UE重建立成功的目标 eNB发送上下文释放完成响 应, 指示源 eNB释放 UE上下文结果。
步骤 413 : 源 eNB向 MME发送 UE上下文释放请求, 请求释放除了目 标 eNB 1之外的所述 UE的其它候选小区的 eNB中的上下文信息。
步骤 414: MME向除了重建立成功的目标 eNB之外的其它候选小区的 目标 eNB, 分别发送 UE上下文释放命令。
步骤 415 : 各个候选小区的目标 eNB释放 UE上下文后, 分别向 MME 回复所述 UE的上下文释放完成响应。
步骤 416: 所述 MME向源 eNB返回上下文释放结果。
实施例三、
当所述当前 eNB为源 eNB, 候选小区的 eNB为目标 eNB时, 基于 X2 接口的重建立处理方法一如图 5所示。
步骤 501 : 源 eNB根据无线信道状态信息, 挑选出可能发生重建立的候 选 UE组成候选 UE列表, 根据邻区配置信息和 UE历史信息, 挑选出所述 候选 UE列表中各个 UE的候选小区。
步骤 502: 源 eNB通过发送切换请求分别向候选小区的目标 eNB发送 上下文建立请求消息。
所述上下文建立请求消息在挑选出的候选小区的目标 eNB 为挑选出的 重建立候选 UE建立上下文。
通过 X2接口发送的 UE上下文建立请求消息如表 2所示, 包括 RRC上 下文信息、 安全信息和 E-RAB信息等:
Figure imgf000015_0001
表 2 步骤 503 : 各个候选小区的目标 eNB建立 UE的上下文消息后, 通过切 换请求应答信息向源 eNB返回上下文消息建立响应。
步骤 504: UE发生重建立时, 所述 UE向目标 eNB 1发送 RRC连接重 建立流程。
步骤 505: 目标 eNB 1 匹配到所述 UE的上下文信息后, 向所述 UE发 送 RRC连接重建立并恢复 SRB。
步骤 506: 所述 UE向目标 eNB 1返回 RRC连接重建立完成。
步骤 507: 所述目标 eNB 1向源 eNB发送上下文释放指示。
所述上下文释放指示包括释放所述 UE在源 eNB的上下文。
步骤 508: 源 eNB分别向目标 eNB 1之外的、 所述 UE的其它候选小区 的目标 eNB发送 UE上下文释放消息。 实施例四、
当所述当前 eNB为源 eNB, 候选小区的 eNB为目标 eNB时, 基于 S1 接口的重建立处理方法二如图 6所示。
步骤 601 :源 eNB根据无线信道状态信息挑选出若干可能发生重建立的 UE建立候选 UE列表,根据邻区配置信息和 UE历史信息挑选出候选 UE列 表中, 各个 UE的候选小区。
步骤 602: 源 eNB向 MME发送切换请求消息, 用于请求在候选小区的 目标 eNB中建立对应的 UE的上下文信息。
步骤 603 : MME收到来自源 eNB的切换请求消息后, 分别向各候选小 区的目标 eNB发送切换请求消息,请求在目标 eNB建立 UE的上下文信息。
步骤 604: 各候选小区的目标 eNB收到切换请求消息后, 建立 UE的上 下文信息, 分别向 MME返回切换请求的应答消息。
步骤 605: MME收到各个目标 eNB回复的切换请求应答消息后, 向源 eNB分别发送切换命令, 用于指示在目标 eNB建立 UE的上下文信息成功。
步骤 606: UE向目标 eNB 1发起 RRC连接重建立请求时, 执行 RRC 连接重建立流程。
步骤 607:所述目标 eNB 1与 UE C连接重建立成功后,所述目标 eNB 1执行 UE上下文释放流程。 实施例五、
当所述当前 eNB为源 eNB, 候选小区的 eNB为目标 eNB时, 基于 X2 接口的重建立处理方法二如图 7所示。
步骤 701 :源 eNB根据无线信道状态信息挑选出若干可能发生重建立的 UE建立候选 UE列表,根据邻区配置信息和 UE历史信息挑选出候选 UE列 表中, 各个 UE的候选小区。
步骤 702: 源 eNB分别向候选小区的目标 eNB发送切换请求消息, 请 求在候选小区建立 UE的上下文信息;
步骤 703: 各候选小区的目标 eNB收到切换请求消息后, 在目标 eNB 建立 UE的上下文信息, 成功后分别向源 eNB回复切换请求应答消息;
步骤 704: UE向目标 eNB 1发起 RRC连接重建立请求时, 执行 RRC 连接重建立流程。
步骤 705:所述目标 eNB 1与 UE RRC连接重建立成功后,所述目标 eNB 1执行 UE上下文释放流程。 实施例六、
基于 S1接口等待 UE重建立超时处理如图 8所示。
步骤 801 :重建立候选 UE在指定的时间内没有重建立到候选小区, eNB 向 MME发送上下文释放请求,用于指示释放各候选小区的目标 eNB准备的 上下文。
步骤 802: 所述 MME分别向各候选小区的目标 eNB发送上下文释放命 令, 指示释放准备的上下文。
步骤 803: 各候选小区的目标 eNB释放 UE上下文后, 分别向 MME回 UE上下文释放完成, 指示 UE上下文释放完成。
步骤 804: MME分别向源 eNB回 UE上下文释放响应, 指示各候选小 区的目标 eNB准备的上下文释放结果。 实施例七、
当所述当前 eNB为源 eNB, 候选小区的 eNB为目标 eNB时, 基于 X2 接口等待 UE重建立超时处理如图 9所示。
步骤 901 : 在指定的时间内重建立候选 UE没有重建立到候选小区, 源 eNB等待 UE重建立超时;
步骤 902: 所在目标 eNB, 源 eNB分别向各候选小区的目标 eNB发送 上下文释放请求, 指示释放准备的上下文;
步骤 903: 各候选小区的目标 eNB释放 UE上下文后, 分别向源 eNB 返回 UE上下文释放响应, 指示准备的 UE上下文释放结果;
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、 一种无线资源控制 RRC连接重建立的方法, 该方法包括:
当前演进型基站 eNB为候选用户设备 UE列表中的 UE选定候选小区; 分别将所述候选 UE列表中 UE的上下文信息, 传递至所述候选小区的 eNB;
当所述候选小区的 eNB收到所述 UE的 RRC连接重建请求时, 所述候 选小区的 eNB根据所述 UE的上下文信息, 与所述 UE进行 RRC连接重建 立。
2、 根据权利要求 1所述的方法, 其中, 所述 eNB为候选用户设备 UE 列表中的 UE选定候选小区之前, 该方法还包括: eNB预测出会发生 RRC 连接重建立的一个或多个 UE, 将选出的所述一个或多个 UE加入所述候选 UE列表;
其中, 所述预测出会发生 RRC连接重建立的一个或多个 UE, 包括: 如果自身管理范围内任意一个 UE的参考信号接收强度低于预设门限值 和 /或参考信号接收质量低于预设门限值, 则所述 UE为会发生 RRC连接重 建立的 UE;
和 /或, 如果自身管理范围内任意一个 UE 的混合自动重传请求 HARQ 失败次数高于预设门限, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或,如果自身管理范围内任意一个 UE的数据传输信息错误率高于预 设门限, 则所述 UE为会发生 RRC连接重建立的 UE。
3、 根据权利要求 1所述的方法, 其中, 所述选定候选小区, 包括: 将本小区配置的邻小区作为候选小区;
或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 获取为本小区配置的邻小区, 作为邻小区集合; 并且根据所述 UE的历史信息, 获取在指定时间内所述 UE的历史重建立小区, 作为所述 UE的历史重建小区集合; 对所述邻小区集合和所述历史重建立小区集合取 交集或并集, 得到所述 UE的候选小区;
或者, 将本小区的所述 UE测量到的一个或多个邻小区作为候选小区。
4、 根据权利要求 1所述的方法, 其中, 所述分别将候选 UE列表中各 个 UE的上下文信息, 传递至所述候选小区的 eNB, 该方法还包括: 所述当 前 eNB启动定时器。
5、根据权利要求 4所述的方法, 其中, 所述当前 eNB启动定时器之后, 所述方法还包括:
若定时器达到指定时限、 且所述候选 UE列表中有任意一个 UE未发生 RRC连接重建立, 则向所述 UE的各个候选小区的 eNB, 发起释放所述 UE 的上下文信息的消息;
当任意一个候选小区的 eNB收到释放所述 UE的上下文信息的消息时, 释放本地保存的所述 UE的上下文信息。
6、 根据权利要求 1所述的方法, 其中, 当所述候选小区的 eNB收到所 述 UE的 RRC连接重建请求时, 所述候选小区的 eNB根据所述 UE的上下 文信息, 与所述 UE进行 RRC连接重建立, 包括:
若任意一个候选小区的 eNB接收到所述 UE的 RRC连接重建请求, 则 所述候选小区的 eNB使用所述 UE的上下文信息恢复 RRC连接;
所述候选小区的 eNB向所述 UE的当前 eNB发送释放所述 UE的上下 文信息的消息;
所述 UE的当前 eNB根据接收到的释放所述 UE的上下文信息的消息, 释放本地保存的所述 UE的上下文信息; 并且, 所述 UE的当前 eNB向所述 UE除重建立到的小区之外的其它候选小区的 eNB, 发送释放所述 UE的上 下文信息的消息。
7、 一种 eNB, 所述 eNB包括: 管理模块和收发模块; 其中,
管理模块, 配置为为候选 UE列表中的 UE选定候选小区; 将候选 UE 列表中 UE的上下文信息发送给收发模块;
收发模块, 配置为将管理模块发来的 UE的上下文信息发出。
8、 根据权利要求 7所述的 eNB, 其中,
所述管理模块,配置为预测出会发生 RRC连接重建立的一个或多个 UE, 将选出的所述一个或多个 UE加入所述候选 UE列表;
其中, 所述预测出会发生 RRC连接重建立的一个或多个 UE, 包括: 如果自身管理范围内任意一个 UE的参考信号接收强度低于预设门限值 和 /或参考信号接收质量低于预设门限值, 则所述 UE为会发生 RRC连接重 建立的 UE;
和 /或, 如果自身管理范围内任意一个 UE的 HARQ失败次数高于预设 门限, 则所述 UE为会发生 RRC连接重建立的 UE;
和 /或,如果自身管理范围内任意一个 UE的数据传输信息错误率高于预 设门限, 则所述 UE为会发生 RRC连接重建立的 UE。
9、 根据权利要求 8所述的 eNB, 其中,
所述管理模块, 配置为将本小区配置的邻小区作为候选小区;
或者, 将本小区的所述 UE重建立到的历史重建立小区作为候选小区; 或者, 获取为本小区配置的所有邻小区, 作为邻小区集合; 并且根据候 选 UE列表中的各个 UE的历史信息, 获取在指定时间内各个 UE的历史重 建立小区, 作为各个 UE 的历史重建小区集合; 对所述邻小区集合和各个 UE的历史重建立小区集合分别取交集或并集, 得到各个 UE的一个或多个 候选小区;
或者, 将本小区的所述 UE测量到的一个或多个邻小区作为候选小区。
10、 根据权利要求 7-9任一项所述的 eNB, 其中, 所述 eNB还包括: 定时模块, 配置为根据收发模块的控制, 启动定时器;
相应的, 所述收发模块, 配置为将候选 UE列表中各个 UE的上下文信 息发出时, 控制定时模块启动定时器。
11、 根据权利要求 10所述的 eNB, 其中,
所述管理模块, 配置为实时检测定时模块的定时器, 若定时器达到指定 时限、且所述候选 UE列表中有任意一个 UE未发生 RRC连接重建立, 则发 起释放所述 UE的上下文信息。
12、 一种 eNB, 所述 eNB包括:
控制模块, 配置为根据接收到的 UE的上下文信息进行 RRC连接重建 立。
13、 根据权利要求 12所述的 eNB, 其中, 所述 eNB还包括: 收发模块, 配置为将接收到的 RRC连接重建请求发送给控制模块;
相应的, 所述控制模块, 配置为若收到收发模块发来的 RRC连接重建 请求, 则利用所述 UE的上下文信息恢复 RRC连接; 并发送释放所述 UE的 上下文信息。
14、 一种 RRC连接重建立的系统, 所述系统包括: 当前 eNB和一个或多 个候选小区的 eNB; 其中,
所述当前 eNB, 配置为为候选 UE列表中的各个 UE选定候选小区; 分 别将候选 UE列表中各个 UE的上下文信息,发送至对应的候选小区的 eNB; 所述候选小区的 eNB, 配置为根据接收到的 UE的上下文信息, 与 UE 进行 RRC连接重建立。
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