WO2016184157A1 - Procédé et appareil permettant le traitement d'un programme dans un système de communication mobile - Google Patents

Procédé et appareil permettant le traitement d'un programme dans un système de communication mobile Download PDF

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Publication number
WO2016184157A1
WO2016184157A1 PCT/CN2016/072008 CN2016072008W WO2016184157A1 WO 2016184157 A1 WO2016184157 A1 WO 2016184157A1 CN 2016072008 W CN2016072008 W CN 2016072008W WO 2016184157 A1 WO2016184157 A1 WO 2016184157A1
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Prior art keywords
program
interface
nas
ran
handover procedure
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PCT/CN2016/072008
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English (en)
Chinese (zh)
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王昕�
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management

Definitions

  • This document relates to, but is not limited to, the field of communications, and in particular, to a method and apparatus for processing a program in a mobile communication system.
  • the low-power base station is usually deployed within the coverage or boundary of the macro base station, and even deployed in areas without macro base station coverage.
  • the macro base station and the low-power base station belong to the radio access network (Radio Access Network, RAN for short) in the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system, thereby serving the user equipment ( User Equipment (UE) provides mobile communication services that meet their needs as much as possible.
  • Radio Access Network Radio Access Network
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • UE User Equipment
  • Each of the handover procedures includes a signaling interaction between the serving base station of the UE and the core network element (mainly referred to as a Mobility Management Entity (MME)), and further includes services in the MME and the core network.
  • MME Mobility Management Entity
  • a feasible solution is to add a logical node/function module in the radio access network, whose main function is to switch the program generated by the UE when moving between low-power base stations in a certain area to the core network.
  • the logical node/function module is referred to in this patent as a RAN Gateway (RAN Gateway).
  • RAN Gateway RAN Gateway
  • FIG. 1(a) two implementation forms of the system architecture in which the RAN GW is deployed are shown.
  • the RAN GW is an independent node in the access network (ie, does not depend on whether there is a deployment of a macro base station), and the RAN GW is equivalent to a base station when facing the core network, and respectively serves the UE.
  • the control plane interface S1-C and the user plane interface S1-U are established between the MME and the S-GW; and when facing the access network, the RAN GW is equivalent to the core network element, that is, establishing control with the low-power base station.
  • Interface interface S1-C and user plane interface S1-U can be transmitted via the RAN GW, and further, according to the configuration capability of the RAN GW, part of The core network related procedures/signaling (such as the path conversion procedure in the X2 handover procedure) can be processed directly at the RAN GW without having to occupy the core network.
  • Figure 1 (b) is applicable to a scenario with a macro base station deployment.
  • the RAN GW can be configured as a logical node/function module on the macro base station.
  • the interface establishment and node function configuration are similar to the description of Figure 1 (a).
  • the access network when the access network performs the X2 or S1 handover procedure of the core network element without replacing the node for the UE, the NAS program initiated by the core network (or the S1 interface program, such as the establishment/modification/release of the dedicated bearer)
  • the base station sends a reject message indicating that the handover procedure is in progress to the MME.
  • the MME re-initiates the NAS program when the handover procedure has been completed (eg, the MME receives the path switch request message sent by the base station) or the handover procedure is considered to be unsuccessful.
  • a timer is set in the core network for the NAS program.
  • the core network considers the NAS program to be a failure. It should be noted that the operation mechanism is also applicable to other related core network programs/signaling or even new core network programs/signaling (refer to the standard specifications for details), such as a Circuit Switched Fallback indication. UE context correction request message.
  • the MME rejects the bearer triggered by the Packet Data Network Gateway (P-GW) in the core network by a message carrying an indication indicating that the handover procedure is in progress.
  • P-GW Packet Data Network Gateway
  • the P-GW is receiving the location
  • a timer is started; when the P-GW learns that the handover procedure is completed, or the handover fails, or the timer expires, the P-GW re-initiates the bearer request procedure.
  • the X2 handover procedure in which the serving MME and the S-GW do not change the node is taken as an example, after the MME sends a message such as a dedicated bearer setup request (E-RAB SETUP REQUEST) to the access network.
  • E-RAB SETUP REQUEST a dedicated bearer setup request
  • the MME receives a rejection message indicating that the handover procedure is in progress, and the MME should re-initiate the E-RAB SETUP after waiting for the handover procedure to complete or fail.
  • REQUEST message REQUEST message.
  • the RAN GW hides the handover procedure from the core network, that is, there is no message indicating that the handover completion or failure is sent to the MME, the MME will remain in the waiting state until the timer for protecting the E-RAB SETUP program expires.
  • the core network will consider this program to fail to execute, which may further cause the P-GW to try to re-initiate the program. Therefore, this not only affects multiple network elements in the core network, but also makes the program difficult to complete or greatly prolongs the completion time, resulting in degradation of network service performance.
  • the MME does not reject the bearer request procedure triggered by the P-GW, that is, the MME may Transmitting the relevant signaling of the bearer request procedure to the access network; however, because this conflicts with the handover procedure in the access network, the bearer cannot be successfully executed. If the P-GW has not received the completion reply message corresponding to the request message before the timer configured by the P-GW expires, the P-GW may consider that the previous program fails to be executed, but needs to be re-initiated. The program is over. Similar to the above, this additionally increases the possibility of program failure and affects the performance of network services.
  • Embodiments of the present invention provide a method and an apparatus for processing a program in a mobile communication system, and the technical problem to be solved is that in the system described above, when the non-access stratum (Non Access Stratum, referred to as How can the program of the NAS or S1 interface continue to be executed when the program of the NAS or S1 interface is rejected due to a conflict with the access network program transmission.
  • Non-access stratum Non Access Stratum
  • a method for processing a program in a mobile communication system comprising:
  • the radio access network gateway RAN GW or the core network NE After the collision between the program of the non-access stratum NAS or the S1 interface and the handover procedure occurs, after detecting the success or failure of the handover procedure, the radio access network gateway RAN GW or the core network NE resends the NAS or S1 interface. Request instructions for the program.
  • the method further includes:
  • the core network element After detecting the conflict between the program of the non-access stratum NAS or the S1 interface and the handover procedure, the core network element starts a timer, and after the timer expires, the core network element resends the program of the NAS or the S1 interface. Request instruction.
  • the radio access network gateway RAN GW After the collision between the program of the non-access stratum NAS or the S1 interface and the handover procedure occurs, after detecting that the handover procedure runs successfully or fails, the radio access network gateway RAN GW resends the NAS or the S1 interface.
  • the request instruction of the program including:
  • the RAN GW After forwarding the request instruction of the program of the NAS or the S1 interface sent by the core network element, the RAN GW determines that the conflict between the program of the NAS or the S1 interface and the switching program occurs, and then detects that the switching program runs successfully or fails, and then restarts a request instruction for transmitting a program of the NAS or S1 interface;
  • the core network element After the conflict between the program of the non-access stratum NAS or the S1 interface and the handover procedure occurs, after detecting the success or failure of the handover procedure, the core network element resends the request instruction of the program of the NAS or the S1 interface, include:
  • the core network element After receiving the notification message sent by the RAN GW or the base station after detecting the success or failure of the handover procedure, the core network element retransmits the request instruction of the program of the NAS or the S1 interface; wherein the notification message is received by the core network element A request instruction for notifying the core network element to resend the program of the NAS or the S1 interface, or notifying the core network element program of success or failure.
  • the RAN GW determines that the conflict between the program that generates the NAS or the S1 interface and the handover procedure is implemented in the following manner, including:
  • the RAN GW receives a reject message for the request command, and determines, according to the reject message, a conflict between a program that has a NAS or S1 interface and a handover procedure.
  • the rejection message includes a reason for rejection, wherein the reason for the rejection includes that the handover procedure is in progress.
  • the method further includes:
  • the RAN GW After receiving the request instruction of the program of the NAS or the S1 interface, the RAN GW saves the request instruction of the program of the NAS or the S1 interface, and after resending the request instruction of the program of the NAS or the S1 interface, The request instruction of the program of the NAS or S1 interface is deleted.
  • the RAN GW detects that the handover procedure runs successfully or fails, and the RAN GW learns that the handover procedure runs successfully or fails by detecting the path conversion request procedure.
  • the RAN GW resends the request command of the program of the NAS or the S1 interface after detecting that the handover program runs successfully or fails, including: if the handover procedure is successful, the RAN GW will program the NAS or the S1 interface.
  • the request instruction is sent to the target base station; if the handover procedure fails, the RAN GW sends a request instruction of the program of the NAS or S1 interface to the source base station.
  • the conflict between the program that detects the occurrence of the NAS or S1 interface and the switching procedure by the core network element includes:
  • the core network element receives the reject message for the request command forwarded by the RAN GW, and determines, according to the reject message, a conflict between a program that occurs on the NAS or the S1 interface and the handover procedure.
  • the duration of the timer is configured by the network, or is configured by the operator, or the mobility management entity MME randomly selects a duration value within a pre-configured maximum duration.
  • the duration of the timer is further determined according to the indication information, where the indication information is used to indicate a stage that the handover procedure has been performed or a waiting time required for the handover procedure to complete; and/or the timer
  • the duration is also determined according to the duration of the protection timer of the handover procedure.
  • the indication information is sent by a reject message to the request instruction.
  • the notification message sent by the RAN GW or the base station after detecting the success or failure of the handover procedure includes: sending, by the RAN GW or the base station, the notification message by using an S1 interface message.
  • the notification message sent by the core network element after receiving the RAN GW or the base station after detecting that the handover procedure runs successfully or fails includes:
  • the RAN GW generates the notification information, and sends the notification information to the core network element.
  • the RAN GW generates the notification information at the following time points, including:
  • a wireless access network gateway comprising:
  • the determining module is configured to determine, after forwarding the request instruction of the program of the NAS or the S1 interface sent by the core network element, the conflict between the program of the NAS or the S1 interface and the switching procedure;
  • the first processing module is configured to resend the request instruction of the program of the NAS or the S1 interface after detecting that the switching program runs successfully or fails.
  • the determining module includes:
  • a receiving unit configured to receive a reject message for the request instruction
  • the determining unit is configured to determine, according to the reject message, a conflict between the program that generates the NAS or the S1 interface and the switching program.
  • the rejection message includes a reason for rejection, wherein the reason for the rejection includes that the handover procedure is in progress.
  • the radio access network gateway further includes:
  • a saving module configured to save a request instruction of the program of the NAS or the S1 interface after receiving the request instruction of the program of the NAS or the S1 interface;
  • the deletion module is set to delete the request instruction of the program of the NAS or the S1 interface after resending the request instruction of the program of the NAS or the S1 interface.
  • the first processing module is configured to detect whether the switching program runs successfully or fails by detecting the path conversion request program to learn whether the switching program runs successfully or fails.
  • the first processing module is configured to:
  • the RAN GW sends a request instruction of the program of the NAS or S1 interface to the target base station; if the handover procedure fails, the RAN GW sends a request instruction of the program of the NAS or S1 interface Give the source base station.
  • a core network element including:
  • the startup module is configured to start the timer after a conflict between the program of the NAS or the S1 interface and the switching program occurs;
  • the second processing module is configured to resend the request instruction of the program of the NAS or the S1 interface after the timer expires.
  • the startup module is configured to detect a conflict between a program that generates a NAS or an S1 interface and a switching program by:
  • the rejection message includes a reason for rejection, wherein the reason for the rejection includes that the handover procedure is in progress.
  • the duration of the timer is configured by the network, or is configured by the operator, or the MME randomly selects a duration value within a pre-configured maximum duration.
  • the duration of the timer is further determined according to the indication information, where the indication information is used to indicate a stage that the handover procedure has been performed or a waiting time required for the handover procedure to complete; and/or the timer
  • the duration is also determined according to the duration of the protection timer of the handover procedure.
  • the indication information is sent by a reject message to the request instruction.
  • a wireless access network gateway comprising:
  • the detecting module is configured to detect an operating state of the switching program after a conflict between the program of the non-access stratum NAS or the S1 interface and the switching program occurs;
  • a third processing module configured to send a notification message after detecting that the switching program runs successfully or fails; wherein the notification message is used to notify the core network element to resend the NAS or S1 interface The request instruction of the program, or notify the core network element program to run successfully or fail.
  • the third processing module is configured to send the notification message through the S1 interface.
  • the third processing module is configured to:
  • the third processing module is configured to generate the notification information at a time point:
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • the success rate and the completion time of the NAS/S1 interface program can be ensured in the system architecture of FIG. 1 to avoid further impact on more core network elements, and the performance of the system is improved. It is used in various types of radio access network nodes and wired interfaces, and has no impact on user terminals.
  • FIG. 1(a) is a schematic diagram of a system architecture for deploying a RAN GW in the related art
  • FIG. 1(b) is a schematic diagram of another system architecture for deploying a RAN GW in the related art
  • FIG. 2 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a radio access network gateway according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a core network element according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another radio access network gateway according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 1 of the present invention.
  • the method of FIG. 2 includes: the core network initiates a bearer setup procedure and sends a bearer setup request message to the current serving base station of the UE (referred to as a source base station in a handover procedure).
  • the request The message is sent by the MME in the core network to the RAN GW in the access network, and then sent by the RAN GW to the source base station.
  • the source base station replies to the RAN GW with a reject message because the bearer setup procedure conflicts with the handover procedure being performed for the same UE in the access network.
  • the RAN GW sends the same bearer setup request message to the target base station.
  • the steps are shown in Figure 2.
  • Step 1 The core network element P-GW initiates a dedicated bearer activation procedure, and the MME sends a bearer setup request (E-RAB SETUP REQUEST) message 1 to the access network as a control node for the access network.
  • the MME serving the UE first sends the message 1 to the RAN-GW in the access network through the S1 interface, where the message 1 carries the UE.
  • the serving base station address or identification information, the identification information (UE S1AP ID) allocated by the UE on the S1 interface, and the Non-Access Stratum Protocol Data Unit (NAS-PDU).
  • NAS-PDU Non-Access Stratum Protocol Data Unit
  • Step 2 After receiving the message 1, the RAN GW stores the message 1 on the one hand, and on the other hand, the S1 interface, and sends the message to the destination base station (ie, the source base station, the message indicated in the message). 2).
  • the destination base station ie, the source base station, the message indicated in the message. 2.
  • the source base station may be performing an X2 handover procedure on the UE when receiving the message 2. Sequence, this may occur in the handover preparation phase in the handover procedure (involving the source base station and the target base station), and may also occur in the handover execution phase in the handover procedure (involving the source base station, the target base station and the UE); then, the source base station A refusal message (message 3) for the message 2 is sent to the RAN GW, the message 3 containing a cause value indicating that the (X2) handover procedure is in progress.
  • Step 3 After receiving the message 3, the RAN GW puts the bearer setup procedure into a waiting state.
  • the target base station sends a PATH SWITCH REQUEST message 4 to the RAN GW, the role of the message 4 is to inform the RAN GW to switch the downlink data tunnel endpoint of the relevant bearer from the source base station to Target base station.
  • the message 4 does not need to be further sent by the RAN GW to the MME, but by the RAN GW.
  • the PATH SWITCH REQUEST ACKNOWLEDGE message 5 is directly replied to the target base station.
  • the target base station After receiving the message 5, the target base station sends a UE context release message 6 to the source base station, which indicates that the handover procedure is successfully completed.
  • Step 4 Through the path switching request procedure, the RAN GW learns that the X2 handover procedure is successful, then the RAN GW sends the previously stored message 2 to the target base station (message 7), where the message 7 carries the RAN GW as the The identifier assigned by the UE on the S1 interface with the target base station. If the handover procedure fails and the UE remains in the source base station for service, then the RAN GW will resend the message 2 to the source base station in this step.
  • the specific time point at which the RAN GW sends the message 7 is not limited in this scheme.
  • the target base station instructs the UE to perform establishment of the relevant bearer through the wireless Uu interface, and simultaneously performs transmission of the NAS message.
  • the target base station replies to the RAN GW with a bearer setup response (E-RAB SETUP RESPONSE) message and a corresponding NAS feedback message, and the RAN GW further transmits the message to the MME, the bearer setup procedure Successful completion on the S1 interface.
  • the deletion of the locally stored message may be within a time period from the sending of the message 7 to the sending of the message 9.
  • the specific time point is not limited by the solution, and may be determined by the RAN GW.
  • the RAN GW needs to have the ability to identify and handle conflicts between the two programs based on information such as the identity of the UE and the base station.
  • the duration of the protection timer configured by the core network for the dedicated bearer activation program has been considered due to conflict with the handover procedure.
  • the conflict processing node is the RAN GW, and the message transmission path is shortened, so whether the configuration of the specific duration needs to be changed, and if necessary, the value of the specific change is changed. How to determine, this can be considered in combination with the system architecture and solution described in the embodiments of the present invention, and can be finally determined by the implementation or specific configuration of the operator.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • FIG. 3 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 2 of the present invention.
  • the method of FIG. 3 includes: the core network initiates a bearer modification procedure and sends a bearer modification request message to the current serving base station of the UE (referred to as a source base station in a handover procedure), and the request is performed in the system architecture described in FIG.
  • the message is sent by the MME to the RAN GW in the access network and then sent by the RAN GW to the source base station.
  • the source base station replies to the RAN GW with a reject message, and the RAN GW sends the reject message to the MME.
  • the MME starts a timer. After the timer expires, the MME sends the same bearer modification request message to the target base station via the RAN GW.
  • the steps are shown in Figure 3.
  • Step 1 The core network element P-GW initiates a bearer modification procedure, and the MME sends a bearer modification request (E-RAB MODIFY REQUEST) message 1 to the access network as a control node for the access network.
  • E-RAB MODIFY REQUEST bearer modification request
  • the MME serving the UE first sends the message 1 to the RAN-GW in the access network through the S1 interface, and the message is similar to that described in the first embodiment. 1 carries information such as a service base station address or identifier of the UE.
  • Step 2 After receiving the message 1, the RAN GW sends a request message to the corresponding low-power base station through the S1 interface according to the destination node address information carried in the message 1 (message 2, where the message is low).
  • the power base station refers to the source base station, and the message 2 carries the identifier that the RAN GW allocates on the S1 interface established between the UE and the source base station.
  • the source base station may be performing an X2 handover procedure on the UE when receiving the message 2. Sequence, this conflict situation may occur in the handover preparation phase in the handover procedure (involving the source base station and the target base station), and may also occur in the handover execution phase in the handover procedure (involving the source base station, the target base station, and the UE); In this case, the source base station replies to the RAN GW with a reject message (message 3) containing a cause value indicating that the X2 handover is in progress. The RAN GW further transmits the received message 3 to the MME (message 4) via the S1 interface.
  • Step 3 After receiving the message 4, the MME learns that, for the UE, the previously initiated bearer modification procedure conflicts with the ongoing handover procedure in the access network, so the MME starts a timer.
  • the duration of the timer may be configured by the network side (for example, according to an empirical value or other related indication information) or by the operator, or may be randomly selected by the MME for a duration value within a pre-configured maximum duration.
  • the configuration of the duration needs to consider on the one hand to avoid retrying again due to the conflict again, that is, to reduce the number of retry attempts; on the other hand, it is necessary to consider reducing the unnecessary waiting time, that is, not completing the switching procedure for a long time. Only try again.
  • the source base station may indicate, in the message 3, a specific phase of the handover procedure or a reference value of the waiting time, and the duration selection of the timer may be more reasonable according to the indication information, such as The time at which the handover procedure is completed performs a retry of the bearer modification procedure.
  • Step 4 After the timer expires, the MME sends an E-RAB MODIFY REQUEST message (message 5) to the RAN GW again, wherein the message 5 contains the same content as the message 1 (the destination node still points) Source base station). If the RAN GW learns that the handover procedure has succeeded, the RAN GW may send the message 5 to the target base station (message 6); if the RAN GW learns that the handover procedure fails or does not acquire the handover procedure related Information, then the RAN GW sends the message 5 to the source base station (message 6a).
  • the determination of whether the message 5 is sent to the source base station or the target base station requires the RAN GW to understand the conflict between the previous bearer modification procedure and the handover procedure in addition to the information of the UE and the destination node indicated in the message 5.
  • the roles and causes of the execution of the program and the execution of the program are all related.
  • the RAN GW further transmits the message to the source base station (message 6a) in accordance with the indication of the message 5.
  • the source base station forwards the message 6 to the target base station; If the handover procedure fails and the UE is still receiving the service at the source base station, the source base station instructs the UE to perform modification of the relevant bearer through the wireless Uu interface according to the indication of the message 5, and simultaneously performs transmission of the NAS message.
  • the source base station may carry the identifier of the target base station in the message 3.
  • the MME may directly carry the identifier of the target base station in the message 5
  • the RAN GW further transmits the message 5 to the target base station (message 6) as instructed.
  • Step 5 After the radio interface procedure is completed, the target base station (taking the success of the handover procedure as an example) replies to the RAN GW with an E-RAB MODIFY RESPONSE message 7 and a corresponding NAS feedback message, and the RAN GW will These messages (message 8) are further sent to the MME, which successfully completes the bearer modification procedure on the S1 interface.
  • the duration of the protection timer configured by the core network for the bearer modification procedure should take into account the duration of the timer that the MME may start.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • FIG. 4 is a flowchart of a method for processing a program in a mobile communication system according to Embodiment 3 of the present invention.
  • the method of FIG. 4 includes: the core network initiates a bearer release procedure and sends a bearer release command message to the current serving base station of the UE (referred to as a source base station in a handover procedure).
  • a source base station in a handover procedure.
  • the message is sent by the MME to the RAN GW in the access network and then sent by the RAN GW to the source base station.
  • the source base station replies to the RAN GW with a reject message, and the RAN GW further sends the reject message to the MME.
  • the target base station (or source base station) or the RAN GW indicates to the MME through the S1 interface that the handover procedure has been completed, then the MME may retry the bearer release procedure.
  • the steps are shown in Figure 4.
  • Step 1 The core network element P-GW initiates a bearer deactivation procedure, and the MME sends a bearer release command (E-RAB) to the access network as a control node for the access network.
  • E-RAB bearer release command
  • RELEASE COMMAND Message 1.
  • the MME serving the UE first sends the message 1 to the RAN-GW in the access network through the S1 interface, and the message is similar to that described in the first embodiment. 1 carries information such as a service base station address or identifier of the UE.
  • Step 2 After receiving the message 1, the RAN GW sends a command message to the corresponding low-power base station (message 2) through the S1 interface according to the destination node address information carried in the message 1.
  • the low power base station When the low power base station (source base station) receives the message 2, it may be performing an X2 handover procedure on the UE, and the collision situation may occur in a handover preparation phase in the handover procedure (involving the source base station and the target base station) ), may also occur in the handover execution phase in the handover procedure (involving the source base station, the target base station and the UE); in this case, the source base station replies to the RAN GW with a reject message (message 3), The message 3 contains a cause value indicating that the X2 handover is in progress.
  • the RAN GW further transmits the received message 3 to the MME (message 4) via the S1 interface.
  • Step 3 After receiving the message 4, the MME learns that the previously initiated bearer release procedure conflicts with the ongoing handover procedure in the access network. Therefore, the MME suspends execution of the bearer release procedure, that is, enters a wait state.
  • Step 4 After the handover procedure succeeds, the target base station may indicate completion of the handover procedure to the RAN GW through an S1 interface message (message 5); if the handover procedure fails and the UE is still receiving service at the source base station, the message 5 The transmission is performed by the source base station. The transmission of the message 5 is performed in the completion phase of the handover procedure, and the specific time is not limited.
  • the RAN GW will further send the message 5 to the MME (message 5a), the role of the message 5a is to enable the MME to know that the handover procedure that caused the conflict has ended, and the bearer release procedure can be retried.
  • the message 5a shall contain at least an identifier assigned by the UE on the S1 interface (the S1 interface refers to the S1 interface established before the MME and the RAN GW), and an indication that the handover procedure has been completed.
  • the message 5a may also be directly generated by the RAN GW and sent to the MME. Similar to the above, the time point at which the RAN GW sends the message 5a may be that no limitation is made after the completion or completion of the completion phase of the handover procedure, or after the failure of the handover procedure is known.
  • RAN GW can The premise that the message 5a is generated is that it can understand the conflict between the bearer release program and the switch program in addition to the information of the UE and the destination node indicated in the message, that is, the execution target of the program and the execution reason of the program and The roles and the like correspond to each other so that the message can be generated autonomously when the handover procedure succeeds or fails.
  • Step 5 After receiving the message 5a, the MME re-attempts the previously suspended bearer release procedure, that is, retransmits the E-RAB RELEASE COMMAND message 6 to the RAN GW (assuming that the bearer to be released is not released in the handover procedure).
  • the RAN GW is aware of the current serving base station (source base station or target base station) of the UE, and further transmits the message 6 (message 7) to the corresponding serving base station, and the UE performs the UE command through the wireless Uu port. Release of related bearers and simultaneous transmission of NAS messages.
  • the target base station replies to the RAN GW with an E-RAB RELEASE RESPONSE message 8, which further transmits the messages (message 9) to the MME.
  • the bearer release procedure is successfully completed on the S1 interface.
  • the duration configuration should take into account that the RAN GW, which has the processing capability of the transmission message, is added to the access network.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • the embodiment combines the solutions of the second embodiment and the third embodiment, and the following is explained:
  • the core network element resends the request command of the program of the NAS or the S1 interface under any of the following conditions, including:
  • Condition 1 After the conflict between the program of the NAS or the S1 interface and the switching procedure occurs, the core network element starts the timer, and after the timer expires, resends the request instruction of the program of the NAS or the S1 interface;
  • Condition 2 Upon receiving the RAN GW or the base station detects that the handover procedure runs successfully or fails After the notification message is sent, the request instruction of the program of the NAS or the S1 interface is resent; wherein the notification message is used to notify the core network element to resend the request instruction of the program of the NAS or the S1 interface, or notify The core network element running program succeeded or failed.
  • the core network element can resend the request command of the program of the NAS or the S1 interface after the timer expires or after receiving the notification message.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • FIG. 5 is a schematic structural diagram of a radio access network gateway according to an embodiment of the present invention.
  • the radio access network gateway shown in Figure 5 includes:
  • the determining module 501 is configured to: after forwarding the request instruction of the program of the NAS or the S1 interface sent by the core network element, determine that a conflict between the program of the NAS or the S1 interface and the switching procedure occurs;
  • the first processing module 502 is configured to resend the request instruction of the program of the NAS or the S1 interface after detecting that the switching program runs successfully or fails.
  • the determining module 501 includes:
  • a receiving unit configured to receive a reject message for the request instruction
  • the determining unit is configured to determine, according to the reject message, a conflict between the program that generates the NAS or the S1 interface and the switching program.
  • the rejection message includes a reason for rejection, wherein the reason for the rejection includes that the handover procedure is in progress.
  • the radio access network gateway further includes:
  • a saving module configured to save a request instruction of the program of the NAS or the S1 interface after receiving the request instruction of the program of the NAS or the S1 interface;
  • the deletion module is set to delete the request instruction of the program of the NAS or the S1 interface after resending the request instruction of the program of the NAS or the S1 interface.
  • the first processing module is configured to detect whether the switching program runs successfully or fails by detecting the path conversion request program to learn whether the switching program runs successfully or fails.
  • the first processing module 502 is configured to:
  • the RAN GW sends a request instruction of the program of the NAS or S1 interface to the target base station; if the handover procedure fails, the RAN GW sends a request instruction of the program of the NAS or S1 interface Give the source base station.
  • the radio access network gateway provided by the embodiment of the present invention can ensure the success rate and completion time of the NAS/S1 interface program in the system architecture of FIG. 1 to avoid further impact on more core network elements.
  • the performance of the system is improved, and it is applicable to various types of wireless access network nodes and wired interfaces, and has no impact on user terminals.
  • FIG. 6 is a schematic structural diagram of a core network element according to an embodiment of the present invention.
  • the core network element shown in Figure 6 includes:
  • the startup module 601 is configured to: after the conflict between the program of the NAS or the S1 interface and the handover procedure occurs, the core network element starts the timer;
  • the second processing module 602 is configured to resend the request instruction of the program of the NAS or the S1 interface after the timer expires.
  • the startup module 601 is configured to detect a conflict between the program that generates the NAS or the S1 interface and the switching program by:
  • the rejection message includes a reason for rejection, wherein the reason for the rejection includes that the handover procedure is in progress.
  • the duration of the timer is configured by the network, or is configured by the operator, or the MME randomly selects a duration value within a pre-configured maximum duration.
  • the duration of the timer is further determined according to the indication information, where the indication information is used to indicate a stage that the handover procedure has been performed or a waiting time required for the handover procedure to complete; and/or the timer
  • the duration is also determined according to the duration of the protection timer of the handover procedure.
  • the indication information is sent by a reject message to the request instruction.
  • the core network element provided by the embodiment of the present invention can ensure the system architecture in FIG. 1 as much as possible.
  • the success rate and completion time of the NAS/S1 interface program avoid further impact on more core network elements, improve system performance, and are applicable to various types of radio access network nodes and wired interfaces, and The user terminal has no effect.
  • FIG. 7 is a schematic structural diagram of another radio access network gateway according to an embodiment of the present invention.
  • the radio access network gateway shown in Figure 7 includes:
  • the detecting module 701 is configured to detect an operating state of the switching program after a conflict between the program of the non-access stratum NAS or the S1 interface and the switching program occurs;
  • the third processing module 702 is configured to send a notification message after detecting that the handover program runs successfully or fails; wherein the notification message is used to notify the core network element to resend the request instruction of the program of the NAS or the S1 interface, or , notify the core network element program to run successfully or failed.
  • the third processing module 702 is configured to send the notification message through the S1 interface.
  • the third processing module 702 is configured to:
  • the third processing module 702 is configured to generate the notification information at the following time points, including:
  • the radio access network gateway provided by the embodiment of the present invention can ensure the success rate and completion time of the NAS/S1 interface program in the system architecture of FIG. 1 to avoid further impact on more core network elements.
  • the performance of the system is improved, and it is applicable to various types of wireless access network nodes and wired interfaces, and has no impact on user terminals.
  • the instructions are related to hardware (eg, a processor) that can be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk.
  • a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • the invention is not limited to any specific form of combination of hardware and software.
  • the foregoing technical solution can ensure the success rate and the completion time of the NAS/S1 interface program, avoid affecting the core network element, improve the performance of the system, and is applicable to various types of radio access network nodes and wired interfaces, and No impact on the user terminal.

Abstract

L'invention concerne un procédé et un appareil permettant le traitement d'un programme dans un système de communication mobile. Le procédé comprend les étapes suivantes : après un conflit entre un programme de strate de non-accès (NAS) ou une interface S1 et un programme de commutation, et après avoir détecté que le programme de commutation s'exécute avec ou sans succès, une passerelle du réseau d'accès radioélectrique (RAN GW) ou un élément du réseau central ré-envoie une demande d'instruction destinée au programme de strate de non-accès (NAS) ou à l'interface S1.
PCT/CN2016/072008 2015-05-20 2016-01-25 Procédé et appareil permettant le traitement d'un programme dans un système de communication mobile WO2016184157A1 (fr)

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CN201510259990.5A CN106304187A (zh) 2015-05-20 2015-05-20 一种移动通信系统中程序的处理方法和装置
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EP3698573B1 (fr) 2017-10-17 2022-06-01 Telefonaktiebolaget LM Ericsson (publ) Mappage de type de session pdn et pdu, et découverte de capacité
US11039369B2 (en) * 2018-08-10 2021-06-15 Mediatek Inc. Handling 5G QoS rules on QoS operation errors
CN109819491B (zh) * 2019-03-21 2021-07-06 创新维度科技（北京）有限公司 切换控制方法、基站和存储介质

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CN102598775A (zh) * 2009-10-30 2012-07-18 高通股份有限公司 用于在cs回退期间发生切换时处理冲突的电路交换回退过程的方法、装置和计算机程序产品
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CN102598775A (zh) * 2009-10-30 2012-07-18 高通股份有限公司 用于在cs回退期间发生切换时处理冲突的电路交换回退过程的方法、装置和计算机程序产品
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