WO2013152709A1 - 无线链路的重建方法及装置 - Google Patents

无线链路的重建方法及装置 Download PDF

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Publication number
WO2013152709A1
WO2013152709A1 PCT/CN2013/073924 CN2013073924W WO2013152709A1 WO 2013152709 A1 WO2013152709 A1 WO 2013152709A1 CN 2013073924 W CN2013073924 W CN 2013073924W WO 2013152709 A1 WO2013152709 A1 WO 2013152709A1
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WO
WIPO (PCT)
Prior art keywords
base station
security algorithm
cause value
target base
wireless link
Prior art date
Application number
PCT/CN2013/073924
Other languages
English (en)
French (fr)
Inventor
王达菲
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/391,881 priority Critical patent/US9344931B2/en
Priority to EP13775401.6A priority patent/EP2838307B1/en
Priority to JP2015504853A priority patent/JP6129952B2/ja
Publication of WO2013152709A1 publication Critical patent/WO2013152709A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0079Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0077Transmission or use of information for re-establishing the radio link of access information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60Context-dependent security
    • H04W12/61Time-dependent
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/20Network architectures or network communication protocols for network security for managing network security; network security policies in general
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/19Connection re-establishment

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for reconstructing a wireless link.
  • a user equipment User Equipment, UE for short
  • the UE After the UE switches to the E-UTRAN Node B (eNB), the UE needs to adopt a new security algorithm configuration, but
  • the UE initiates a re-establishment request, and the security algorithm is rolled back to the old security algorithm (ie, the security algorithm used by the source eNB). Therefore, it is mentioned in the prior art that when the UE switches, the source eNB needs to transmit its security algorithm to the destination side eNB for use in the scenario of reestablishing the wireless link.
  • the security algorithm of the source eNB is delivered to the target eNB and used in the scenario of potential re-establishment of the wireless link, and the specific scenario of reestablishing the wireless link is not distinguished.
  • there are multiple scenarios for reestablishing a wireless link Some scenarios for reestablishing a wireless link are not caused by a UE handover failure. If in this scenario, the UE security algorithm is rolled back to the old security algorithm. , there will be a problem with the fallback process failure. For example, in a scenario of non-contention handover, the UE receives Msg2 (the second message of random access), at this time.
  • the UE considers that the handover is successful.
  • the radio link control Radio Link Control, referred to as RLC
  • the UE also initiates a re-establishment request to the destination eNB.
  • the destination eNB does not receive the reconfiguration complete message, and the destination eNB considers that the handover is unsuccessful.
  • the security algorithm of the UE is updated to the old security algorithm.
  • the security algorithm adopted by the UE is already a new security algorithm, only because the reconfiguration is sent to the destination eNB. If the completion message fails, the UE sends a re-establishment request to the destination eNB, which is not a true UE handover failure. Therefore, the security algorithm rollback process performed by the destination eNB necessarily fails.
  • the security algorithm fallback process is erroneously performed during the radio link re-establishment process, thereby causing the failure of the radio link reestablishment, and the success rate of the radio link reestablishment is relatively low.
  • the present invention provides a method and an apparatus for reestablishing a wireless link, so as to at least solve the failure of the security algorithm to fall back due to an error in the radio link re-establishment process in the related art, thereby causing failure of radio link reestablishment, and radio link reconstruction.
  • the technical success rate is relatively low.
  • a method for reestablishing a radio link including: receiving, by a destination base station, a re-establishment request message sent by a UE, where the re-establishment request message carries a cause value, and the cause value includes indicating the UE The information of the handover success or the handover failure; the destination base station determines the security algorithm used by the target base station to re-establish the wireless link with the UE according to the cause value, and establishes the wireless link by using the security algorithm.
  • the destination base station determines, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE, and establishes a wireless link by using a security algorithm.
  • the cause value indicates that the UE successfully determines that the handover algorithm is successful.
  • the destination base station determines, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE, and establishes a wireless link by using a security algorithm.
  • the cause value indicates that the UE does not perform handover successfully, and the target base station determines that the security algorithm is A security algorithm of the source base station corresponding to the UE, and using the security algorithm of the source base station to establish a wireless link.
  • a method for reestablishing a radio link including: determining, by a UE, a handover result of a UE; and transmitting, by the UE, a re-establishment request carrying a cause value indicating a handover result to the target base station, where The cause value is used to indicate that the target base station determines, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE.
  • the UE sends a re-establishment request carrying the cause value indicating the handover result to the target base station, where the cause value is used to indicate that the target base station determines, according to the cause value, the security used by the target base station to re-establish the wireless link with the UE.
  • the algorithm includes: when the UE is successfully handed over, the UE sends a re-establishment request carrying the cause value to the target base station, where the cause value includes information indicating that the UE is successfully handed over, and is used to indicate that the target base station determines that the security algorithm is the security algorithm of the target base station.
  • the security algorithm of the destination base station is used to establish a radio link.
  • the UE When the UE fails to switch, the UE sends a re-establishment request carrying the cause value to the target base station, where the cause value includes information indicating that the UE fails to switch, and indicates the purpose.
  • the base station determines that the security algorithm is a security algorithm of the source base station corresponding to the UE, and establishes a wireless link by using the security algorithm of the source base station.
  • a device for reestablishing a wireless link is provided, the device is applied to a base station, and the method includes: a receiving module, configured to receive a re-establishment request message sent by the UE, where the re-establishment request message is Carrying a cause value, the cause value includes information indicating that the UE successfully switches or the handover fails; the determining module is configured to determine, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE, and establish a wireless using a security algorithm. link.
  • the determining module includes: a first determining unit, configured to: when the cause value indicates that the UE is successfully handed over, determine that the security algorithm is a security algorithm of the target base station, and establish a wireless link by using a security algorithm of the target base station.
  • the determining module includes: a second determining unit, configured to: when the cause value indicates that the UE does not successfully switch, determine that the security algorithm is a security algorithm of the source base station corresponding to the UE, and establish a wireless link by using the security algorithm of the source base station .
  • a radio link reestablishing apparatus where the apparatus is applied to a UE, where: the determining module is configured to: determine a handover result of the UE; and the sending module is configured to send the bearer to the destination base station. And a re-establishment request for indicating a cause value of the handover result, where the cause value is used to indicate that the target base station determines, according to the cause value, a security algorithm used by the target base station to re-establish a radio link with the UE.
  • the sending module includes: a first sending unit, configured to: when the UE is successfully handed over, send a re-establishment request carrying a cause value to the target base station, where the cause value includes information indicating that the UE is successfully switched, and is used for indicating purposes.
  • the base station determines that the security algorithm is a security algorithm of the target base station, and establishes a radio link by using the security algorithm of the destination base station; and the second sending unit is configured to: when the UE fails to handover, send a re-establishment request carrying the cause value to the target base station.
  • the cause value includes information indicating that the UE fails to be handed over, and is used to indicate that the target base station determines that the security algorithm is a security algorithm of the source base station corresponding to the UE, and establishes a wireless link by using the security algorithm of the source base station.
  • the destination base station receives the re-establishment request message sent by the UE, where the re-establishment request message carries a cause value, where the cause value includes indicating that the UE successfully switches or switches.
  • the destination base station may determine whether the UE successfully switches according to the cause value, and further determine a security algorithm used by the target base station to re-establish a wireless link with the UE, and use the security algorithm to establish a wireless link, thereby avoiding related technologies.
  • the failure of the security algorithm rollback process cannot determine the failure of the radio link reestablishment caused by the security algorithm used to re-establish the radio link. In this way, the target base station can accurately determine the re-establishment of the radio link.
  • the security algorithm achieves the technical effect of improving the success rate of wireless link reconstruction.
  • FIG. 1 is a flowchart of a method for reconstructing a wireless link according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another method for reconstructing a wireless link according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a second example of a method for reconstructing a wireless link according to an embodiment of the present invention
  • FIG. 5 is an application according to an embodiment of the present invention
  • FIG. 6 is a structural block diagram of a determining module according to an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a reconstructing apparatus for a wireless link applied to a UE according to an embodiment of the present invention
  • FIG. 8 is a structural block diagram of a transmitting module according to an embodiment of the present invention.
  • Steps S102 to S104 are included.
  • the target base station receives the re-establishment request message sent by the UE, where the re-establishment request message carries a cause value, where the cause value includes indicating that the UE successfully switches or fails to switch.
  • the destination base station can determine whether the UE successfully switches according to the cause value, and thus can Determining a security algorithm used by the target base station to re-establish a radio link with the UE, and using the security algorithm to establish a radio link, which avoids the failure of the security algorithm rollback process in the related art, and cannot determine the re-establishment of the radio link.
  • the target base station can accurately determine the security algorithm used to re-establish the wireless link, and achieve the technical effect of improving the success rate of the wireless link reconstruction.
  • a preferred method for determining the reestablishment of the radio link between the target base station and the UE according to the cause value is provided.
  • a security algorithm used, and a method for establishing a wireless link by using a security algorithm For example, when the cause value carried in the received re-establishment request message indicates that the handover is successful, the target base station determines a security algorithm used to re-establish the wireless link.
  • a security algorithm for the target base station, and a wireless link is established by using the security algorithm of the destination base station.
  • the cause value carried in the received re-establishment request message indicates that the UE is successfully handed over, that is, when the security algorithm is not required to be rolled back, even if the reconfiguration complete message fails to be sent, the sending is heavy.
  • the destination base station can still determine whether the UE is successfully handed over according to the cause value, and does not need to perform the security algorithm rollback, which avoids the scenario where the UE handover fails in a true sense (for example, the UE handover succeeds due to The other causes cause the failure of the establishment of the radio link, and the radio link needs to be re-established.
  • the UE and the destination eNB consider that the UE has a successful handover result, which causes the security algorithm to fall back.
  • the destination base station can determine the re-request.
  • the security algorithm used to establish the radio link is the security algorithm of the target base station, and the security algorithm of the destination base station is used to establish a radio link, which avoids the inconsistency between the UE and the destination eNB as determined by the UE.
  • a preferred security algorithm for determining the reestablishment of the radio link between the target base station and the UE according to the cause value is provided, and used.
  • the method for establishing a wireless link by the determined security algorithm for example, when the cause value carried in the received re-establishment request message indicates that the UE does not successfully switch, the target base station determines that the security algorithm is a security algorithm of the source base station corresponding to the UE, and A wireless link is established using the security algorithm of the source base station.
  • the target base station may determine that the UE handover is not successful according to the cause value.
  • the security algorithm is rolled back, and the security algorithm is rolled back in the scenario that the UE does not switch successfully because the UE does not switch successfully.
  • the problem of the process failure is determined, and the security algorithm used to re-establish the wireless link is determined as the security algorithm of the source base station, and the security algorithm of the source base station is used to establish a wireless link, thereby improving the accuracy of the target base station determining whether the UE is successfully switched.
  • FIG. 2 is a flowchart of another method for reconstructing a wireless link according to an embodiment of the present invention.
  • the reconstruction method includes steps S202 to S204.
  • Step S202 The UE determines a handover result of the UE.
  • Step S204 The UE sends a re-establishment request carrying the cause value indicating the handover result to the target base station, where the cause value is used to indicate that the target base station determines, according to the cause value, the security used by the target base station to re-establish the wireless link with the UE. algorithm.
  • the UE first determines whether the UE is successfully handed over, and indicates the determined handover result by using the cause value.
  • the UE When transmitting the re-establishment request to the target base station, the UE carries the cause value in the re-establishment request to indicate that the target base station is configured according to the cause.
  • the value is determined whether the UE is successfully handed over, and the problem that the UE fails to perform the handover success of the UE that is considered by the UE and the destination eNB is inconsistent, and the security algorithm rollback process fails.
  • the security algorithm used by the target base station and the UE to re-establish the wireless link avoids the failure of the security algorithm rollback process in the related art, and cannot determine the wireless link reestablishment failure caused by the security algorithm used to re-establish the wireless link.
  • the problem is that the target base station can accurately determine the security algorithm used to re-establish the wireless link, and improve the success rate of the wireless link reconstruction.
  • a preferred sending to the destination base station is provided.
  • Carrying a re-establishment request for indicating a cause value of the handover result where the cause value is used to indicate a method for the target base station to determine, according to the cause value, a security algorithm used by the target base station to re-establish a radio link with the UE, for example, in the UE
  • the UE sends a re-establishment request carrying the cause value to the target base station, where the cause value includes information indicating that the UE is successfully handed over, and is used to indicate that the target base station determines that the security algorithm is the security algorithm of the target base station, and uses the The security algorithm of the destination base station establishes a radio link.
  • the UE When the UE fails to switch, the UE sends a re-establishment request carrying the cause value to the target base station, where the cause value includes information indicating that the UE fails to be handed over, and is used to indicate that the target base station determines the security.
  • the algorithm is a security algorithm of the source base station corresponding to the UE, and uses the source base station Security algorithms to establish a wireless link.
  • the cause value including the information indicating that the UE is successfully handed over is carried in the re-establishment request and sent to the target base station, even in the reconfiguration.
  • the destination base station can still determine that the UE handover succeeds according to the cause value, and does not need to perform the security algorithm rollback, and then determines the security algorithm used to re-establish the radio link.
  • the security algorithm of the destination base station establishes a radio link by using the security algorithm of the destination base station; when the UE handover is not successful, that is, when the security algorithm needs to be rolled back, the target base station may determine that the UE handover is not successful according to the cause value, and needs to be performed.
  • the security algorithm is rolled back, and the security algorithm used to re-establish the wireless link is determined as the security algorithm of the source base station, and the security algorithm of the source base station is used to establish a wireless link, thereby improving the accuracy of the target base station determining whether the UE is successfully switched.
  • Sexuality which in turn improves the determination of the destination base station and the UE based on the cause value.
  • the accuracy of the security algorithm used in the new wireless link is established; at the same time, the applicable requirements of different scenarios can be met, and the applicable flexibility of the preferred embodiment is enhanced.
  • Step S302 The source eNB (base station) sends a handover request message to the target eNB, where the handover request message carries the security algorithm of the source eNB.
  • Step S304 After receiving the handover request message, the target eNB saves the security algorithm of the source eNB, and sends a handover request response message to the source eNB.
  • Step S306 The source eNB sends a handover command to the UE, and notifies the UE to switch to the target eNB.
  • Step S308 The UE initiates a random access procedure to the target eNB.
  • Step S310 After receiving the Msg2 (process message 2), the UE considers that the UE is successfully handed over, and sends a reconfiguration complete message to the target eNB.
  • Step S312 The reconfiguration complete message cannot receive the acknowledgement of the RLC layer of the target eNB side due to the quality problem of the radio link, and finally causes the radio link establishment failure, and the UE sends a re-establishment request message to the target eNB, and the re-establishment
  • the cause value carried in the request message is other failure, that is, the cause value indicates that the UE is successfully switched, because the cause value is Sanhe: 1. Reconfiguration failure 2. Handover failure 3. Other failure, only 2 indicates the UE is switched.
  • Step S314 After receiving the re-establishment request message, the target eNB determines that the cause value carried in the re-establishment request message is not handover failure (UE handover failure), that is, the cause value indicates that the UE handover is successful, and then continues to adopt the security algorithm of the target eNB.
  • Step S316 Since the UE considers that the handover is successful, the re-establishment request message sent by the UE is processed by a new security algorithm (security algorithm of the target base station), and subsequent messages are also processed by a new security algorithm.
  • Step S318 The security algorithm adopted by the target eNB is a new security algorithm.
  • the target eNB processes the received re-establishment request message and subsequent messages by using the security algorithm.
  • the target base station can still determine the UE according to the cause value. If the handover succeeds, the security algorithm is not required to be rolled back, and the security algorithm used to re-establish the wireless link is determined as the security algorithm of the target base station, and the security algorithm of the target base station is used to establish a wireless link, which avoids the related art.
  • Example 2 In this example, a scenario in which the radio link is reestablished when the UE fails to switch is taken as an example. As shown in FIG. 4, the method for reestablishing the radio link includes steps S402 to S416. Step S402: The source eNB sends a handover request message to the destination eNB, where the handover request message carries a security algorithm of the active eNB. Step S404: After receiving the handover request message, the target eNB saves the security algorithm of the source eNB, and sends a handover request response message to the source eNB.
  • Step S406 The source eNB sends a handover command to the UE, and notifies the UE to switch to the target eNB.
  • Step S408 The UE initiates a random access procedure to the target eNB.
  • Step S410 After the timer expires, the UE does not receive the Msg2, and the UE considers that the handover fails, and sends a re-establishment request message to the target eNB, where the cause value carried in the re-establishment request message is handover failure, that is, the indication UE handover failed.
  • Step S412 After receiving the re-establishment request message, the target eNB determines that the cause value of the re-establishment request message is handover failure, and then reverts the security algorithm to the security algorithm of the source eNB, that is, determines the security used to re-establish the radio link.
  • the algorithm is a security algorithm of the source base station.
  • Step S414 Since the UE considers that the handover has failed, the re-establishment request message sent by the UE is processed by the old security algorithm, and subsequent messages are also processed by the old security algorithm.
  • Step S416 The security algorithm adopted by the target eNB is the old security algorithm after the rollback.
  • the target eNB processes the received re-establishment request message and subsequent messages by using the security algorithm.
  • the target base station may determine that the UE handover is not successful according to the cause value, and the security algorithm needs to be rolled back, thereby determining that the wireless link is re-established.
  • the security algorithm is a security algorithm of the source base station, and uses the security algorithm of the source base station to establish a wireless link.
  • a preferred wireless link reconstruction apparatus is also provided, and FIG. 5 is based on the present invention.
  • FIG. 5 is based on the present invention.
  • the apparatus is applicable to a base station.
  • the reestablishing apparatus of the radio link includes: a receiving module 502, and a determining module 504.
  • the receiving module 502 is configured to receive a re-establishment request message sent by the user equipment UE, where the re-establishment request message carries a cause value, where the cause value includes information used to indicate that the UE successfully switches or the handover fails;
  • the determining module 504 is connected to the receiving
  • the module 502 is configured to determine, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE, and establish a wireless link by using a security algorithm.
  • the receiving module 502 receives the re-establishment request message sent by the UE, where the re-establishment request message carries a cause value, where the cause value includes indicating that the UE successfully switches.
  • the determining module 504 may determine, according to the cause value, whether the UE successfully switches, and further determine a security algorithm used by the target base station to re-establish the wireless link with the UE, and use the security algorithm to establish a wireless link, to avoid
  • the problem of failure of the wireless link reestablishment caused by the security algorithm used to re-establish the wireless link cannot be determined. In this way, the target base station can accurately determine to re-establish the wireless chain.
  • the security algorithm adopted by the road improves the success rate of wireless link reconstruction.
  • the determining module 504 includes: The first determining unit 5042 and the second determining unit 5044 will be described in detail below.
  • the first determining unit 5042 is configured to: when the cause value indicates that the UE is successfully handed over, determine that the security algorithm is a security algorithm of the target base station, and establish a wireless link by using a security algorithm of the target base station.
  • Second determining unit 5044 And when the cause value indicates that the UE does not successfully switch, determining that the security algorithm is a security algorithm of the source base station corresponding to the UE, and establishing a wireless link by using a security algorithm of the source base station.
  • the first determining unit 5042 may still use the reason. The value determines that the UE is successfully handed over, and does not need to perform the security algorithm rollback.
  • the UE fails to switch in the true sense the UE handover succeeds, and the radio link establishment fails due to other reasons, and needs to be re-established.
  • the wireless link the UE and the destination eNB consider that the UE has a successful handover result, and the security algorithm rollback process fails, and the security algorithm used to re-establish the wireless link is determined as the security algorithm of the target base station.
  • the security algorithm of the destination base station is used to establish a radio link.
  • the second determining unit 5044 may determine that the UE handover is not successful according to the cause value, and the security algorithm needs to be performed.
  • FIG. 7 is a structural block diagram of a reconstruction apparatus of a wireless link applied to the UE according to an embodiment of the present invention.
  • the apparatus is applicable.
  • the reestablishing apparatus of the radio link includes: a determining module 702, and a sending module 704.
  • the determining module 702 is configured to determine a handover result of the UE.
  • the sending module 704 is connected to the determining module 702, configured to send, to the target base station, a re-establishment request carrying a cause value indicating a handover result, where the cause value is used for indicating purposes.
  • the base station determines, according to the cause value, a security algorithm used by the target base station to re-establish a wireless link with the UE.
  • the determining module 702 first determines whether the UE is successfully handed over, and indicates the determined handover result by using the cause value.
  • the sending module 704 sends the re-establishment request to the target base station, the reason value is carried in the re-establishment request. Determining whether the UE is successfully handed over according to the cause value, and avoiding the fact that the UE and the destination eNB consider that the handover success of the UE is inconsistent, and the security algorithm is rolled back.
  • the applicable flexibility of the preferred embodiment is improved. As shown in FIG.
  • the foregoing sending module 704 The method includes: a first sending unit 7042, configured to: when the UE is successfully handed over, send a re-establishment request carrying a cause value to the target base station, where the cause value includes information indicating that the UE is successfully handed over, and is used to indicate that the target base station determines the security algorithm.
  • the second sending unit 7044 configured to send a re-establishment request carrying a cause value to the target base station when the UE handover fails, where
  • the cause value includes information indicating that the UE fails to be handed over, and is used to indicate that the target base station determines that the security algorithm is a security algorithm of the source base station corresponding to the UE, and establishes a wireless link by using the security algorithm of the source base station.
  • the first sending unit 7042 carries the cause value including the information indicating that the handover of the UE is successful, and sends the cause value in the re-establishment request to the target base station. Even if the re-establishment request message is sent, the destination base station can still determine that the UE handover is successful according to the cause value, and does not need to perform the security algorithm rollback, thereby determining that the re-establishment of the radio link is adopted.
  • the security algorithm is a security algorithm of the target base station, and uses the security algorithm of the destination base station to establish a radio link.
  • the second sending unit 7044 When the UE handover is not successful, that is, when the security algorithm needs to be rolled back, the second sending unit 7044 will include the indication UE.
  • the value of the unsuccessful information is sent to the destination base station in the re-establishment request.
  • the destination base station can determine that the UE handover is not successful according to the cause value, and the security algorithm needs to be rolled back to determine the security used to re-establish the wireless link.
  • the algorithm is a security algorithm of the source base station, and the source base station is used
  • the algorithm establishes a radio link, thereby improving the accuracy of the target base station determining whether the UE successfully performs handover, and further improving the accuracy of the security algorithm used by the destination base station and the UE to re-establish the radio link according to the cause value;
  • the applicable needs of the scenario enhance the applicable flexibility of the preferred embodiment.
  • those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the computing device may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明提供了无线链路的重建方法及装置,其中,该方法包括:目的基站接收UE发送的重建立请求消息,其中,重建立请求消息携带有原因值,原因值包括用于指示UE切换成功或切换失败的信息;目的基站根据原因值确定该目的基站与UE重新建立无线链路所采用的安全算法,并使用安全算法建立无线链路。本发明解决了相关技术中的由于安全算法回退流程的失败而导致的无线链路重建失败的技术问题,达到了提高无线链路重建的成功率的技术效果。

Description

无线链路的重建方法及装置
技术领域 本发明涉及通信领域, 具体而言, 涉及无线链路的重建方法及装置。 背景技术 在切换用户设备 (User Equipment, 简称为 UE) 的时候, 在 UE切换到目的侧演 进基站(E-UTRAN Node B, 简称为 eNB)后, UE需要采用新的安全算法配置, 但是, 对于 UE切换失败的场景, UE会发起重建立请求, 且将安全算法回退为旧的安全算法 (即源测 eNB用的安全算法)。因此,在现有技术中提到,在 UE切换的时候源测 eNB 需要将其安全算法传递给目的侧 eNB, 以供重建立无线链路的场景下使用。 但是, 在现有技术中只提到将源测 eNB的安全算法传递给目的侧 eNB, 并将其用 于潜在的重建立无线链路的场景中, 并没有区分重建立无线链路的具体场景, 然而, 有多种重建立无线链路的场景, 有些重建立无线链路的场景并不是因为 UE切换失败 而导致的, 如果在此场景下, 将 UE的安全算法回退为旧的安全算法, 就会出现回退 流程失败的问题。 例如, 在非竞争切换的场景下, UE 收到 Msg2 (随机接入的第二条消息), 此时
UE就认为切换成功了, 但是, 由于无线链路的质量问题, 在将重配完成消息向目的侧 eNB发送的时候, 在 UE用户面的无线链路控制 (Radio Link Control, 简称为 RLC) 层超出了最大重传次数, 此时, UE也会向目的侧 eNB发起重建立请求, 按现有技术, 由于目的侧 eNB未收到重配完成消息, 目的侧 eNB认为切换没有成功, 此时若收到 了重建立请求就会将 UE的安全算法更新为旧的安全算法, 但是, 由于此时 UE认为 切换成功, UE采用的安全算法已经是新的安全算法, 只是由于向目的侧 eNB发送重 配完成消息失败, UE向目的侧 eNB发送重建立请求, 并不是真正意义上的 UE切换 失败, 因此, 目的侧 eNB进行的安全算法回退流程必然会失败。 在相关技术中, 由于在无线链路重建过程中错误进行安全算法回退流程, 从而导 致了无线链路重建的失败, 无线链路重建的成功率比较低的问题。 发明内容 本发明提供了无线链路的重建方法及装置, 以至少解决相关技术中由于无线链路 重建过程中错误进行安全算法回退流程, 从而导致了无线链路重建的失败, 无线链路 重建的成功率比较低的技术问题。 根据本发明的一个方面, 提供了一种无线链路的重建方法, 其包括: 目的基站接 收 UE发送的重建立请求消息, 其中, 重建立请求消息携带有原因值, 原因值包括用 于指示 UE切换成功或切换失败的信息; 目的基站根据原因值确定该目的基站与 UE 重新建立无线链路所采用的安全算法, 并使用安全算法建立无线链路。 优选地, 目的基站根据原因值确定该目的基站与 UE重新建立无线链路所采用的 安全算法, 并使用安全算法建立无线链路包括: 原因值指示 UE切换成功时, 目的基 站确定安全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无线链 路。 优选地, 目的基站根据原因值确定该目的基站与 UE重新建立无线链路所采用的 安全算法, 并使用安全算法建立无线链路包括: 原因值指示 UE没有切换成功时, 目 的基站确定安全算法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法 建立无线链路。 根据本发明的另一方面, 提供了一种无线链路的重建方法, 其包括: UE确定 UE 的切换结果; UE向目的基站发送携带有用于指示切换结果的原因值的重建立请求,其 中, 原因值用于指示目的基站根据该原因值确定该目的基站与 UE重新建立无线链路 所采用的安全算法。 优选地, UE向目的基站发送携带有用于指示切换结果的原因值的重建立请求,其 中, 原因值用于指示目的基站根据该原因值确定该目的基站与 UE重新建立无线链路 所采用的安全算法包括: UE切换成功时, UE向目的基站发送携带有原因值的重建立 请求, 其中, 原因值包括有指示 UE切换成功的信息, 用于指示目的基站确定安全算 法为该目的基站的安全算法,并采用该目的基站的安全算法建立无线链路; UE切换失 败时, UE向目的基站发送携带有原因值的重建立请求, 其中, 原因值包括有指示 UE 切换失败的信息,用于指示目的基站确定安全算法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法建立无线链路。 根据本发明的又一方面, 提供了一种无线链路的重建装置, 该装置应用于基站, 其包括: 接收模块, 设置为接收 UE发送的重建立请求消息, 其中, 重建立请求消息 携带有原因值, 原因值包括用于指示 UE切换成功或切换失败的信息; 确定模块, 设 置为根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算法, 并使用安 全算法建立无线链路。 优选地, 确定模块包括: 第一确定单元, 设置为在原因值指示 UE切换成功时, 确定安全算法为该目的基站的安全算法,并采用该目的基站的安全算法建立无线链路。 优选地, 确定模块包括: 第二确定单元, 设置为在原因值指示 UE没有切换成功 时, 确定安全算法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法建 立无线链路。 根据本发明的又一方面, 提供了一种无线链路的重建装置, 该装置应用于 UE, 其 包括: 确定模块, 设置为确定 UE的切换结果; 发送模块, 设置为向目的基站发送携 带有用于指示切换结果的原因值的重建立请求, 其中, 原因值用于指示目的基站根据 该原因值确定该目的基站与 UE重新建立无线链路所采用的安全算法。 优选地, 发送模块包括: 第一发送单元, 设置为在 UE切换成功时, 向目的基站 发送携带有原因值的重建立请求, 其中, 原因值包括有指示 UE切换成功的信息, 用 于指示目的基站确定安全算法为该目的基站的安全算法, 并采用该目的基站的安全算 法建立无线链路; 第二发送单元, 设置为在 UE切换失败时, 向目的基站发送携带有 原因值的重建立请求, 其中, 原因值包括有指示 UE切换失败的信息, 用于指示目的 基站确定安全算法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法建 立无线链路。 在本发明中, 在无线链路的重建过程中, 目的基站接收 UE发送的重建立请求消 息, 其中, 该重建立请求消息中携带有原因值, 该原因值包括用于指示 UE切换成功 或切换失败的信息, 目的基站可以根据原因值来确定 UE是否切换成功, 进而可以确 定该目的基站与 UE重新建立无线链路所采用的安全算法, 并使用该安全算法建立无 线链路, 避免了相关技术中由于安全算法回退流程的失败, 无法确定重新建立无线链 路所采用的安全算法而导致的无线链路重建失败的问题, 通过上述方式使得目的基站 可以准确地确定重新建立无线链路所采用的安全算法, 达到了提高无线链路重建的成 功率的技术效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中- 图 1是根据本发明实施例的无线链路的重建方法的流程图; 图 2是根据本发明实施例的另一种无线链路的重建方法的流程图; 图 3是根据本发明实施例的无线链路的重建方法的实例一的流程图; 图 4是根据本发明实施例的无线链路的重建方法的实例二的流程图; 图 5是根据本发明实施例的应用于基站的无线链路的重建装置的结构框图; 图 6是根据本发明实施例的确定模块的结构框图; 图 7是根据本发明实施例的应用于 UE的无线链路的重建装置的结构框图; 以及 图 8是根据本发明实施例的发送模块的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 在本优选实施例中, 提供了一种无线链路的重建方法, 图 1是根据本发明实施例 的无线链路的重建方法的流程图, 如图 1所示, 该无线链路的重建方法包括步骤 S102 至步骤 S104。 步骤 S102: 目的基站接收 UE发送的重建立请求消息, 其中, 重建立请求消息携 带有原因值, 原因值包括用于指示 UE切换成功或切换失败的信息。 步骤 S102: 目的基站根据原因值确定该目的基站与 UE重新建立无线链路所采用 的安全算法, 并使用安全算法建立无线链路。 通过上述步骤, 在无线链路的重建过程中, 目的基站接收 UE发送的重建立请求 消息, 其中, 该重建立请求消息中携带有原因值, 该原因值包括用于指示 UE切换成 功或切换失败的信息, 目的基站可以根据原因值来确定 UE是否切换成功, 进而可以 确定该目的基站与 UE重新建立无线链路所采用的安全算法, 并使用该安全算法建立 无线链路, 避免了相关技术中由于安全算法回退流程的失败, 无法确定重新建立无线 链路所采用的安全算法而导致的无线链路重建失败的问题, 通过上述方式使得目的基 站可以准确地确定重新建立无线链路所采用的安全算法, 达到了提高无线链路重建的 成功率的技术效果。 为了准确地根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算法, 在本优选实施例中, 提供了一种优选的根据原因值确定该目的基站与 UE重新建立无 线链路所采用的安全算法, 并使用安全算法建立无线链路的方法, 例如, 在接收到的 重建立请求消息中携带的原因值指示 UE切换成功时, 目的基站确定重新建立无线链 路所采用的安全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无 线链路。 在上述优选实施例中, 在接收到的重建立请求消息中携带的原因值指示 UE切换 成功时, 即不需要进行安全算法回退时, 即使在重配完成消息发送失败等场景下, 发 送重建立请求消息时, 目的基站依然可以根据原因值确定出 UE是否切换成功, 不需 要进行安全算法回退, 避免了在并不是真正意义上的 UE切换失败的场景下 (例如: UE切换成功, 由于其他的原因导致无线链路建立的失败, 需要重新建立无线链路), UE与目的侧 eNB认为的 UE是否切换成功的结果不一致而导致安全算法回退流程失 败的问题, 进而目的基站可以确定重新建立无线链路所采用的安全算法为该目的基站 的安全算法,并采用该目的基站的安全算法建立无线链路,避免了相关技术中由于 UE 与目的侧 eNB认为的 UE是否切换成功的结果不一致, 而导致目的侧 eNB (基站)发 起的安全算法回退流程失败的问题, 从而提高了目的基站确定 UE是否切换成功的准 确性, 进而提高了根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算 法的准确性。 同时, 为了提高适用灵活性, 以满足不同场景的适用需求, 在本优选实施例中, 提供了一种优选的根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算 法, 并使用确定的安全算法建立无线链路的方法, 例如, 在接收到的重建立请求消息 中携带的原因值指示 UE没有切换成功时, 目的基站确定安全算法为该 UE对应的源 基站的安全算法, 并采用该源基站的安全算法建立无线链路。 在上述优选实施例中, 在接收到的重建立请求消息中携带的原因值指示 UE切换 没有成功时, 即需要进行安全算法回退时, 目的基站可以根据原因值确定出 UE切换 没有成功, 需要进行安全算法回退, 避免了在并不是真正意义上的 UE切换失败的场 景下, UE与目的侧 eNB认为的 UE是否切换成功的结果不一致而导致安全算法回退 流程失败的问题, 进而确定重新建立无线链路所采用的安全算法为该源基站的安全算 法, 并采用该源基站的安全算法建立无线链路, 从而提高了目的基站确定 UE是否切 换成功的准确性, 进而提高了根据原因值确定目的基站与 UE重新建立无线链路所采 用的安全算法的准确性; 同时, 可以满足不同场景的适用需求, 增强了本优选实施例 的适用灵活性。 本优选实施例中还提供了另一种无线链路的重建方法, 图 2是根据本发明实施例 的另一种无线链路的重建方法的流程图, 如图 2所示, 该无线链路的重建方法包括步 骤 S202至步骤 S204。 步骤 S202: UE确定 UE的切换结果。 步骤 S204: UE向目的基站发送携带有用于指示切换结果的原因值的重建立请求, 其中, 原因值用于指示目的基站根据该原因值确定该目的基站与 UE重新建立无线链 路所采用的安全算法。 通过上述步骤, UE首先确定该 UE是否切换成功, 并用原因值指示确定出的切换 结果, 在向目的基站发送重建立请求时, 将原因值携带在重建立请求中, 以指示目的 基站根据该原因值确定 UE是否切换成功, 避免了在并不是真正意义上的 UE切换失 败的场景下, UE与目的侧 eNB认为的 UE是否切换成功的结果不一致而导致安全算 法回退流程失败的问题, 进而确定目的基站与 UE重新建立无线链路所采用的安全算 法, 避免了相关技术中由于安全算法回退流程的失败, 无法确定重新建立无线链路所 采用的安全算法而导致的无线链路重建失败的问题, 从而使得目的基站可以准确地确 定重新建立无线链路所采用的安全算法, 提高了无线链路重建的成功率。 为了准确地向目的基站发送携带有用于指示切换结果的原因值的重建立请求, 同 时, 提高本优选实施例的适用灵活性, 在本优选实施例中, 提供了一种优选的向目的 基站发送携带有用于指示切换结果的原因值的重建立请求, 其中, 原因值用于指示目 的基站根据该原因值确定该目的基站与 UE重新建立无线链路所采用的安全算法的方 法,例如,在 UE切换成功时, UE向目的基站发送携带有原因值的重建立请求,其中, 原因值包括有指示 UE切换成功的信息, 用于指示目的基站确定安全算法为该目的基 站的安全算法, 并采用该目的基站的安全算法建立无线链路; 在 UE切换失败时, UE 向目的基站发送携带有原因值的重建立请求, 其中, 原因值包括有指示 UE切换失败 的信息, 用于指示目的基站确定安全算法为该 UE对应的源基站的安全算法, 并采用 该源基站的安全算法建立无线链路。 在上述优选实施例中, 在 UE切换成功时, 即不需要进行安全算法回退时, 将包 括有指示 UE切换成功的信息的原因值携带在重建立请求中发送给目的基站, 即使在 重配完成消息发送失败等场景下, 发送重建立请求消息时, 目的基站依然可以根据原 因值确定出 UE切换成功, 不需要进行安全算法回退, 进而确定重新建立无线链路所 采用的安全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无线链 路; 在 UE切换没有成功时, 即需要进行安全算法回退时, 目的基站可以根据原因值 确定出 UE切换没有成功, 需要进行安全算法回退, 进而确定重新建立无线链路所采 用的安全算法为该源基站的安全算法, 并采用该源基站的安全算法建立无线链路, 从 而提高了目的基站确定 UE是否切换成功的准确性, 进而提高了根据原因值确定目的 基站与 UE重新建立无线链路所采用的安全算法的准确性; 同时, 可以满足不同场景 的适用需求, 增强了本优选实施例的适用灵活性。 以下结合附图和几个优选的实例对上述各个优选实施方式进行详细的描述。 实例一 在本实例中以 UE切换成功时进行无线链路的重建的场景为例, 如图 3所示, 该 无线链路的重建方法包括步骤 S302至步骤 S318。 步骤 S302: 源 eNB (基站) 向目的 eNB发送了切换请求消息, 该切换请求消息 中携带源 eNB的安全算法。 步骤 S304:目的 eNB收到该切换请求消息后将源 eNB的安全算法保存,向源 eNB 发送了切换请求响应消息。 步骤 S306: 源 eNB向 UE下发了切换命令, 通知 UE向目的 eNB切换。 步骤 S308: UE向目的 eNB发起随机接入流程。 步骤 S310: UE收到 Msg2 (过程消息 2)以后,认为该 UE切换成功, 向目的 eNB 发送重配完成消息。 步骤 S312:由于无线链路的质量问题,该重配完成消息无法收到目的 eNB侧 RLC 层的确认, 最终导致了无线链路建立的失败, UE向目的 eNB发送重建立请求消息, 该重建立请求消息中携带的原因值为 other failure (其他失败), 即原因值指示 UE切换 成功, 因为,原因值有三禾中: 1. Reconfiguration failure 2. Handover failure 3. Other failure, 只有 2是指示 UE切换失败, 在原因值为 1或 3的场景下, UE切换都是成功的。 步骤 S314: 目的 eNB收到重建立请求消息以后, 判断该重建立请求消息中携带 的原因值不是 handover failure (UE切换失败), 即原因值指示 UE切换成功, 则继续 采用目的 eNB的安全算法。 步骤 S316: 由于 UE认为是切换成功了, 所以其发送的重建立请求消息是用新的 安全算法 (目的基站的安全算法) 处理的, 其后续的消息也采用新的安全算法处理。 步骤 S318: 目的 eNB所采用的安全算法即新的安全算法, 因此, 目的 eNB对接 收到的重建立请求消息以及后续的消息, 都采用该安全算法来处理。 在本实施例中, UE切换成功时, 即不需要进行安全算法回退时, 即使在重配完成 消息发送失败等场景下, 发送重建立请求消息时, 目的基站依然可以根据原因值确定 出 UE切换成功, 不需要进行安全算法回退, 进而确定重新建立无线链路所采用的安 全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无线链路, 避免 了相关技术中由于 UE与目的侧 eNB认为的 UE是否切换成功的结果不一致, 而导致 目的侧 eNB (基站) 发起的安全算法回退流程失败的问题。 实例二: 在本实例中以 UE切换失败时进行无线链路的重建的场景为例, 如图 4所示, 该 无线链路的重建方法包括步骤 S402至步骤 S416。 步骤 S402: 源 eNB向目的侧 eNB发送了切换请求消息, 该切换请求消息中携带 有源 eNB的安全算法。 步骤 S404:目的 eNB收到该切换请求消息后将源 eNB的安全算法保存,向源 eNB 发送了切换请求响应消息。 步骤 S406: 源 eNB向 UE下发了切换命令, 通知 UE向目的 eNB切换。 步骤 S408: UE向目的 eNB发起随机接入流程。 步骤 S410: UE在定时器超时以后, 未收到 Msg2, UE认为是切换失败, 向目的 eNB发送重建立请求消息, 该重建立请求消息中携带的原因值为 handover failure (切 换失败), 即指示 UE切换失败。 步骤 S412: 目的 eNB收到重建立请求消息以后, 判断该重建立请求消息的原因 值是 handover failure, 则将安全算法回退为源 eNB的安全算法, 即确定重新建立无线 链路所采用的安全算法为源基站的安全算法。 步骤 S414: 由于 UE认为是切换失败了, 所以其发送的重建立请求消息是用旧的 安全算法处理的, 其后续的消息也采用旧的安全算法处理。 步骤 S416: 目的 eNB所采用的安全算法为回退后的旧的安全算法, 因此, 目的 eNB对接收到的重建立请求消息以及后续的消息, 都采用该安全算法来处理。 在本实例中, 在 UE切换没有成功时, 即需要进行安全算法回退时, 目的基站可 以根据原因值确定出 UE切换没有成功, 需要进行安全算法回退, 进而确定重新建立 无线链路所采用的安全算法为该源基站的安全算法, 并采用该源基站的安全算法建立 无线链路, 在本优选实施例中, 还提供了一种优选的无线链路的重建装置, 图 5是根据本发 明实施例的应用于基站的无线链路的重建装置的结构框图, 优选地, 该装置可以应用 于基站, 如图 5所示, 该无线链路的重建装置包括: 接收模块 502, 确定模块 504, 下 面对上述结构进行详细说明。 接收模块 502, 用于接收用户设备 UE发送的重建立请求消息, 其中, 重建立请求 消息携带有原因值, 原因值包括用于指示 UE切换成功或切换失败的信息; 确定模块 504, 连接至接收模块 502, 用于根据原因值确定目的基站与 UE重新建立无线链路所 采用的安全算法, 并使用安全算法建立无线链路。 在上述实施例中, 在无线链路的重建过程中, 接收模块 502接收 UE发送的重建 立请求消息, 其中, 该重建立请求消息中携带有原因值, 该原因值包括用于指示 UE 切换成功或切换失败的信息,确定模块 504可以根据原因值来确定 UE是否切换成功, 进而可以确定该目的基站与 UE重新建立无线链路所采用的安全算法, 并使用该安全 算法建立无线链路, 避免了相关技术中由于安全算法回退流程的失败, 无法确定重新 建立无线链路所采用的安全算法而导致的无线链路重建失败的问题, 通过上述方式使 得目的基站可以准确地确定重新建立无线链路所采用的安全算法, 提高了无线链路重 建的成功率。 为了准确地根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算法, 同时, 满足不同场景的适用需求, 在本优选实施例中, 如图 6所示, 上述确定模块 504 包括: 第一确定单元 5042, 第二确定单元 5044, 下面对上述结构进行详细说明。 第一确定单元 5042, 用于在原因值指示 UE切换成功时, 确定安全算法为该目的 基站的安全算法, 并采用该目的基站的安全算法建立无线链路。 第二确定单元 5044, 用于在原因值指示 UE没有切换成功时, 确定安全算法为该 UE对应的源基站的安全 算法, 并采用该源基站的安全算法建立无线链路。 在上述实施例中, 在 UE切换成功时, 即不需要进行安全算法回退时, 即使在重 配完成消息发送失败等场景下, 发送重建立请求消息时,第一确定单元 5042依然可以 根据原因值确定出 UE切换成功, 不需要进行安全算法回退, 避免了在并不是真正意 义上的 UE切换失败的场景下(UE切换成功, 由于其他的原因导致无线链路建立的失 败, 需要重新建立无线链路), UE与目的侧 eNB认为的 UE是否切换成功的结果不一 致而导致安全算法回退流程失败的问题, 进而确定重新建立无线链路所采用的安全算 法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无线链路, 在 UE切 换没有成功时, 即需要进行安全算法回退时,第二确定单元 5044可以根据原因值确定 出 UE切换没有成功, 需要进行安全算法回退, 进而确定重新建立无线链路所采用的 安全算法为该源基站的安全算法, 并采用该源基站的安全算法建立无线链路, 从而提 高了目的基站确定 UE是否切换成功的准确性, 进而提高了根据原因值确定目的基站 与 UE重新建立无线链路所采用的安全算法的准确性; 同时, 可以满足不同场景的适 用需求, 增强了本优选实施例的适用灵活性。 在本优选实施例中, 还提供了另一种无线链路的重建装置, 图 7是根据本发明实 施例的应用于 UE的无线链路的重建装置的结构框图,优选地,该装置可以应用于 UE, 如图 7所示, 该无线链路的重建装置包括: 确定模块 702, 发送模块 704, 下面对上述 结构进行详细说明。 确定模块 702, 用于确定 UE的切换结果; 发送模块 704, 连接至确定模块 702, 用于向目的基站发送携带有用于指示切换结果的原因值的重建立请求, 其中, 原因值 用于指示目的基站根据该原因值确定该目的基站与 UE重新建立无线链路所采用的安 全算法。 在上述实施例中, 确定模块 702首先确定该 UE是否切换成功, 并用原因值指示 确定出的切换结果, 在发送模块 704向目的基站发送重建立请求时, 将原因值携带在 重建立请求中, 以指示目的基站根据该原因值确定 UE是否切换成功, 避免了在并不 是真正意义上的 UE切换失败的场景下, UE与目的侧 eNB认为的 UE是否切换成功的 结果不一致而导致安全算法回退流程失败的问题, 进而确定目的基站与 UE重新建立 无线链路所采用的安全算法, 避免了相关技术中由于安全算法回退流程的失败, 无法 确定重新建立无线链路所采用的安全算法而导致的无线链路重建失败的问题, 从而目 的基站可以准确地确定重新建立无线链路所采用的安全算法, 提高了无线链路重建的 成功率。 为了准确地向目的基站发送携带有用于指示切换结果的原因值的重建立请求, 同 时, 提高本优选实施例的适用灵活性, 如图 8所示, 在本优选实施例中, 上述发送模 块 704包括: 第一发送单元 7042, 用于在 UE切换成功时, 向目的基站发送携带有原 因值的重建立请求, 其中, 原因值包括有指示 UE切换成功的信息, 用于指示目的基 站确定安全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立无线链 路; 第二发送单元 7044, 用于在 UE切换失败时, 向目的基站发送携带有原因值的重 建立请求, 其中, 原因值包括有指示 UE切换失败的信息, 用于指示目的基站确定安 全算法为该 UE对应的源基站的安全算法,并采用该源基站的安全算法建立无线链路。 在上述优选实施例中, 在 UE切换成功时, 即不需要进行安全算法回退时, 第一 发送单元 7042将包括有指示 UE切换成功的信息的原因值携带在重建立请求中发送给 目的基站, 即使在重配完成消息发送失败等场景下, 发送重建立请求消息时, 目的基 站依然可以根据原因值确定出 UE切换成功, 不需要进行安全算法回退, 进而确定重 新建立无线链路所采用的安全算法为该目的基站的安全算法, 并采用该目的基站的安 全算法建立无线链路; 在 UE切换没有成功时, 即需要进行安全算法回退时, 第二发 送单元 7044将包括有指示 UE切换没有成功的信息的原因值携带在重建立请求中发送 给目的基站, 目的基站可以根据原因值确定出 UE切换没有成功, 需要进行安全算法 回退, 进而确定重新建立无线链路所采用的安全算法为该源基站的安全算法, 并采用 该源基站的安全算法建立无线链路, 从而提高了目的基站确定 UE是否切换成功的准 确性, 进而提高了根据原因值确定目的基站与 UE重新建立无线链路所采用的安全算 法的准确性; 同时, 可以满足不同场景的适用需求, 增强了本优选实施例的适用灵活 性。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 并且在某些情况下, 可以以不同于此处 的顺序执行所示出或描述的步骤, 或者将它们分别制作成各个集成电路模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 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

权 利 要 求 书
1. 一种无线链路的重建方法, 包括:
目的基站接收用户设备 UE发送的重建立请求消息, 其中, 所述重建立请 求消息携带有原因值, 所述原因值包括用于指示所述 UE切换成功或切换失败 的信息;
所述目的基站根据所述原因值确定该目的基站与所述 UE重新建立无线链 路所采用的安全算法, 并使用所述安全算法建立所述无线链路。
2. 根据权利要求 1所述的方法, 其中, 所述目的基站根据所述原因值确定该目的 基站与所述 UE重新建立无线链路所采用的安全算法, 并使用所述安全算法建 立所述无线链路包括:
所述原因值指示所述 UE切换成功时, 所述目的基站确定所述安全算法为 该目的基站的安全算法, 并采用该目的基站的安全算法建立所述无线链路。
3. 根据权利要求 1所述的方法, 其中, 所述目的基站根据所述原因值确定该目的 基站与所述 UE重新建立无线链路所采用的安全算法, 并使用所述安全算法建 立所述无线链路包括:
所述原因值指示所述 UE没有切换成功时, 所述目的基站确定所述安全算 法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法建立所述无 线链路。
4. 一种无线链路的重建方法, 包括:
用户设备 UE确定所述 UE的切换结果;
所述 UE向目的基站发送携带有用于指示所述切换结果的原因值的重建立 请求, 其中, 所述原因值用于指示所述目的基站根据该原因值确定该目的基站 与所述 UE重新建立无线链路所采用的安全算法。
5. 根据权利要求 4所述的方法, 其中, 所述 UE向目的基站发送携带有用于指示 所述切换结果的原因值的重建立请求, 其中, 所述原因值用于指示所述目的基 站根据该原因值确定该目的基站与所述 UE重新建立无线链路所采用的安全算 法包括: 所述 UE切换成功时, 所述 UE向目的基站发送携带有所述原因值的重建 立请求, 其中, 所述原因值包括有指示所述 UE切换成功的信息, 用于指示所 述目的基站确定所述安全算法为该目的基站的安全算法, 并采用该目的基站的 安全算法建立所述无线链路;
所述 UE切换失败时, 所述 UE向目的基站发送携带有所述原因值的重建 立请求, 其中, 所述原因值包括有指示所述 UE切换失败的信息, 用于指示所 述目的基站确定所述安全算法为该 UE对应的源基站的安全算法, 并采用该源 基站的安全算法建立所述无线链路。
6. 一种无线链路的重建装置, 该装置应用于基站, 包括:
接收模块, 设置为接收用户设备 UE发送的重建立请求消息, 其中, 所述 重建立请求消息携带有原因值, 所述原因值包括用于指示所述 UE切换成功或 切换失败的信息;
确定模块, 设置为根据所述原因值确定目的基站与所述 UE重新建立无线 链路所采用的安全算法, 并使用所述安全算法建立所述无线链路。
7. 根据权利要求 6所述的装置, 其中, 所述确定模块包括:
第一确定单元, 设置为在所述原因值指示所述 UE切换成功时, 确定所述 安全算法为该目的基站的安全算法, 并采用该目的基站的安全算法建立所述无 线链路。
8. 根据权利要求 6所述的装置, 其中, 所述确定模块包括:
第二确定单元, 设置为在所述原因值指示所述 UE没有切换成功时, 确定 所述安全算法为该 UE对应的源基站的安全算法, 并采用该源基站的安全算法 建立所述无线链路。
9. 一种无线链路的重建装置, 该装置应用于用户设备 UE, 包括:
确定模块, 设置为确定 UE的切换结果;
发送模块, 设置为向目的基站发送携带有用于指示所述切换结果的原因值 的重建立请求, 其中, 所述原因值用于指示所述目的基站根据该原因值确定该 目的基站与所述 UE重新建立无线链路所采用的安全算法。
10. 根据权利要求 9所述的装置, 其中, 所述发送模块包括:
第一发送单元, 设置为在所述 UE切换成功时, 向目的基站发送携带有所 述原因值的重建立请求, 其中, 所述原因值包括有指示所述 UE切换成功的信 息, 用于指示所述目的基站确定所述安全算法为该目的基站的安全算法, 并采 用该目的基站的安全算法建立所述无线链路;
第二发送单元, 设置为在所述 UE切换失败时, 向目的基站发送携带有所 述原因值的重建立请求, 其中, 所述原因值包括有指示所述 UE切换失败的信 息, 用于指示所述目的基站确定所述安全算法为该 UE对应的源基站的安全算 法, 并采用该源基站的安全算法建立所述无线链路。
PCT/CN2013/073924 2012-04-12 2013-04-09 无线链路的重建方法及装置 WO2013152709A1 (zh)

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