WO2018000457A1 - 一种切换方法及装置 - Google Patents

一种切换方法及装置 Download PDF

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Publication number
WO2018000457A1
WO2018000457A1 PCT/CN2016/090005 CN2016090005W WO2018000457A1 WO 2018000457 A1 WO2018000457 A1 WO 2018000457A1 CN 2016090005 W CN2016090005 W CN 2016090005W WO 2018000457 A1 WO2018000457 A1 WO 2018000457A1
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WO
WIPO (PCT)
Prior art keywords
target
network element
base station
address
target base
Prior art date
Application number
PCT/CN2016/090005
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English (en)
French (fr)
Inventor
应江威
杨艳梅
黄正磊
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to RU2019102421A priority Critical patent/RU2706707C1/ru
Priority to EP16906856.6A priority patent/EP3468253B1/en
Priority to CN201680087141.9A priority patent/CN109328472B/zh
Publication of WO2018000457A1 publication Critical patent/WO2018000457A1/zh
Priority to US16/234,857 priority patent/US10959132B2/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016Hand-off preparation specially adapted for end-to-end data sessions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • H04W36/385Reselection control by fixed network equipment of the core network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present application relates to the field of communications, and in particular, to a handover method and apparatus.
  • the 5G network slice includes a control plane function (CPF) entity and a user plane function (UPF) entity.
  • the CPF entity mainly performs the MM functions such as device access authentication, security encryption, and location registration, and the SM functions such as the establishment, release, and modification of the user plane transmission path; the UPF entity mainly performs the functions of routing and forwarding user plane data.
  • Figure 1 is a schematic diagram of an architecture of a network slice:
  • the RAN has a signaling interface with the MM, and the RAN has a data plane interface with the UPF.
  • User Data database and MM have signaling interface;
  • User Data database and SM There is a signaling interface.
  • the MM may also have a signaling interface with the SM of each network slice.
  • the RAN and the SM may have a signaling interface, and the RAN and the SM may also have no direct interface, but an MM is required to relay signaling between them.
  • the present application provides a handover method and apparatus, and aims to provide a handover method and apparatus for a network separated based on CP and UP and separated by MM and SM in the CP.
  • a first aspect of the present application provides a handover method, including: a mobility management network element determines to perform handover of a session management SM for a user equipment UE, and selects a target session management SM network element, where the mobility management network element triggers The target SM network element performs a channel establishment process, where the channel includes: a user plane data channel between the target user plane function entity and the target base station, so that the network separated by the CP and the UP and the MM and the SM in the CP are separated Switching is possible.
  • a second aspect of the present application provides a mobility management network element comprising a processor and a communication component.
  • the processor is configured to determine a handover of the session management SM for the user equipment UE, and select a target session management SM network element.
  • the communication component is configured to trigger a process of establishing a channel by the target SM network element, where the channel includes: a user plane data channel between the target user plane function entity and the target base station.
  • the mobility management network element triggers the process of establishing the channel by the target SM network element, where the mobility management network element sends the identifier UE ID of the user equipment to the target SM network element,
  • the address of the source SM network element and the information indicating the address of the target base station, the information indicating the address of the target base station includes an address of the target base station or information for mapping to the target base station address.
  • the step of the mobility management network element triggering the target SM network element to establish a channel includes: the mobility management network element sending an address of the target SM network element to the target base station.
  • the target base station sends a UE ID, an address of the source SM network element, and a parameter used to establish a user plane data channel between the UPF2 and the target base station and used for downlink transmission to the target SM network element.
  • the step of the mobility management network element triggering the target SM network element to establish a channel includes: the mobility management network element sending a UE ID to the source SM network element, indicating the target base station The information of the address and the address of the target SM network element.
  • the source SM network element sends the UE ID, the information indicating the address of the target base station, and the function for establishing the target user plane to the target SM network element according to the address of the target SM network element.
  • User plane data channel between the entity and the target base station and used for parameters of downlink transmission.
  • the method further includes: the mobility management network element receiving, by the target base station, the A user plane data channel between the target user plane functional entity and the target base station and used for downlink transmission parameters.
  • a third aspect of the present application provides a handover method, including: determining, by a source SM network element, a handover of an SM for a UE, and selecting a target SM network element.
  • the source SM network element triggers the target SM network element to perform a channel establishment process, where the channel includes: a user plane data channel between the target user plane function entity and the target base station.
  • a third aspect of the present application provides an SM network element, including: a processor and a communication component.
  • the processor is configured to determine the SM handover for the UE and select the target SM network element.
  • the communication component is configured to trigger the establishment process of the channel by the target SM network element, where the channel includes: User plane data channel between the host function entity and the target base station.
  • the process that the source SM network element triggers the target SM network element to establish a channel includes: the source SM network element sends a UE ID to the target SM network element, and indicates the target base station.
  • Information of the address, the information indicating the address of the target base station includes an address of the target base station or information for mapping to the target base station address.
  • the method further includes: the source SM network element receiving the message that triggers the SM redirection sent by the source base station.
  • the message that triggers the SM redirection includes an address of the target base station or information for mapping to an address of the target base station.
  • the process that the source SM network element triggers the target SM network element to establish a channel includes: the source SM network element sends a UE ID to the target SM network element, and indicates the target base station.
  • Information of the address, the information indicating the address of the target base station includes an address of the target base station or information for mapping to the target base station address.
  • the method before the source SM network element determines to perform the SM handover for the UE, and before selecting the target SM, the method further includes: the mobility management network element sending the UE ID and the source SM network element Information about the address of the target base station.
  • the process that the source SM network element triggers the target SM network element to establish a channel includes: the source SM network element sends an address of the target SM network element to the mobility management network element.
  • the mobility management network element sends the address of the target SM network element to the target base station. Sending, by the target base station, the UE ID, the address of the source SM network element, and the user plane data channel between the UPF2 and the target base station, and used for downlink transmission to the target SM network element.
  • the parameters of the input includes: the source SM network element sends an address of the target SM network element to the mobility management network element.
  • the mobility management network element sends the address of the target SM network element to the target base station. Sending, by the target base station, the UE ID, the address of the source SM network element, and the user plane data channel between the UPF2 and the target base station, and used for downlink transmission to the target SM network element.
  • the parameters of the input includes: the source SM network element
  • the method before the source SM network element decides to perform the SM handover for the UE, and before selecting the target SM, the method further includes: the mobility management network element, the information indicating the address of the target base station, and the UE ID. And sending the information to the source SM network element, where the information indicating the address of the target base station includes an address of the target base station or information for mapping to the target base station address.
  • the process that the source SM network element triggers the target SM to establish a channel includes: the source SM network element sends a UE ID to the target SM network element, and is used to establish the UPF2 and the The user plane data channel between the target base stations and used for parameters of downlink transmission.
  • the method further includes: the target base station sending the used to the target SM network element to establish the target user A user plane data channel between the surface functional entity and the target base station and used for parameters of downlink transmission.
  • a fifth aspect of the present application provides a handover method, including: determining, by a target base station, a handover of an SM for a UE, and selecting a target SM network element.
  • the target base station triggers a process of establishing the target SM network element channel, where the channel includes a user plane data channel between the target user plane function entity and the target base station.
  • a sixth aspect of the present application provides a base station including a processor and a communication component.
  • the processor is configured to determine the SM handover for the UE and select the target SM network element.
  • a communication component configured to trigger a process of establishing the target SM network element channel, where the channel includes a user plane data channel between the target user plane function entity and the target base station.
  • the process for the target base station to trigger the establishment of the target SM network element includes: sending, by the target base station, the UE ID, the address of the source SM network element, and the establishment for the target SM network element A parameter of the user plane data channel between the target user plane function entity and the target base station and performing downlink transmission.
  • the process of establishing a channel by the target SM network element includes: the target SM network element is configured to establish a user between the target user plane functional entity and a target base station according to interaction with the target base station. The parameters of the face data channel.
  • the channel further includes: a data channel between the source user plane function entity and the target user plane function entity.
  • the process of establishing the channel by the target SM network element further includes: the target SM network element interacting with the source SM network element to establish the source user plane function entity and the target user The parameters of the data channel between the functional entities.
  • the channel further includes: a control plane signaling channel between the target SM network element and the target base station.
  • the process of establishing the channel by the target SM network element further includes: the target SM network element interacting with the target base station to establish control between the target user plane functional entity and the target base station The parameters of the surface signaling channel.
  • FIG. 1 is a schematic diagram of a communication architecture according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a handover method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 7a is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 7b is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 13 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 14 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 15 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 16 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 17 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 18 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 19 is a flowchart of still another handover method according to an embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of a mobility management network element according to an embodiment of the present invention.
  • the source base station is RAN1
  • the source SM network element is SM1
  • the source UPF entity is UPF1.
  • the handover of the carrier network side is required, and the target of the operator network side handover is: making the source UPF entity (hereinafter referred to as UPF1)
  • UPF2 A data transmission channel is established between the target UPF entity (hereinafter referred to as UPF2)
  • UPF2 uplink and downlink control plane signaling channel is established between the uplink and downlink user plane data channels and the target SM network element SM2 and RAN2 between the UPF2 and the RAN2.
  • FIG. 2 is a schematic diagram of a handover method according to an embodiment of the present application, including the following steps:
  • RAN2 sends a path switch request to the MM.
  • MM determines that the SM needs to be switched for the UE, and SM2 is selected as the target SM.
  • the MM sends the UE ID, the information indicating the address of the RAN2, and the address of the SM1 to the SM2.
  • the UE ID, the information indicating the address of the RAN2, and the address of the SM1 may be sent to the SM2 in the SM relocation notification.
  • the information indicating the address of the RAN2 may be an address of the RAN2 (for example, a base station identifier), or may be information (for example, cell identification information) for mapping to an address of the RAN2. .
  • the SM2 sends the UE ID to the SM1 according to the address of the SM1.
  • the UE ID may be carried in the SM relocation request and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter can be carried in the SM.
  • the positioning response is sent to SM2.
  • the first parameter is used to establish a data transmission channel between the UPF2 and the UPF1 for the UE, and the purpose is to enable the UPF1 to identify which UE the data sent by the UPF2 belongs to.
  • SM1 also sends related parameters of the UE bearer context to SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response response and sent to the SM1.
  • the second parameter is used to establish a data transmission channel between the UPF2 and the UPF1 for the UE, and the purpose is to enable the UPF2 to identify the data sent by the UPF1.
  • the second parameter may also be sent to the SM2 in the SM relocation request of the fourth step.
  • the sixth step is not needed.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2 according to the information indicating the address of the RAN2.
  • the third parameter and the fourth parameter may be carried in the change bearer request and sent to the RAN2, the third parameter and the fourth parameter. It may be carried in a message and sent to RAN2, or it may be carried in two messages and sent to RAN2 respectively.
  • the third parameter is used to establish a data transmission channel between the UPF2 and the RAN2 for the UE, and the RAN2 is used when the uplink user plane data is sent to the SM2, so that the UPF2 can identify the uplink user plane data sent by the RAN2.
  • the fourth parameter is used to establish a signaling transmission channel between the RAN2 and the SM2 for the UE, and is used when the RAN2 sends the uplink control plane signaling to the SM2.
  • the purpose is to enable the SM2 to identify the uplink control plane signaling sent by the RAN2.
  • the RAN2 sends the fifth parameter and the sixth parameter to the SM2.
  • the fifth parameter and the sixth parameter may be carried in the change bearer response and sent to the SM2.
  • the fifth parameter is used when the UPF2 sends the downlink user plane data to the RAN2, so that the RAN2 can identify the downlink user plane data sent by the UPF2.
  • the sixth parameter is used to establish a signaling transmission channel between the RAN2 and the SM2 for the UE.
  • the SM2 is used when the downlink control plane signaling is sent to the RAN2.
  • the purpose is to enable the RAN2 to identify the downlink control plane signaling sent by the SM2.
  • the configuration of the user plane parameters by the SM1 for the UPF1 may include the first parameter and the second parameter sent by the SM1 to the UPF1.
  • the user plane parameter configuration of the SM2 for the UPF2 may include the SM2 sending the first parameter, the second parameter, the third parameter, and the fifth parameter to the UPF2.
  • the SM can send parameters to the corresponding UPF by updating the content configuration.
  • SM1 sends the first parameter and the second parameter to UPF1 after step 6, and is not limited to perform after step 7 or 8.
  • the data channel between UPF1 and UPF2 has been established.
  • the upstream and downstream user plane data channels between UPF2 and RAN2 have been established.
  • the uplink and downlink control plane signaling channels between SM2 and RAN2 have been established.
  • the SM2 sends an SM relocation notification response to the MM.
  • the third parameter and the fourth parameter in step 7 may be brought to the RAN 2 in this step 10, in which case step 7 is not required.
  • the MM sends a path switch request response to the RAN2. Alternatively, this step can be performed after the first step.
  • steps 3-8 in FIG. 2 is not limited.
  • the transmission of the third parameter, the fourth parameter, the fifth parameter, and the sixth parameter may be forwarded by other core network nodes, such as an MM and/or a message forwarding entity.
  • the message forwarding entity may be a NAS proxy node.
  • the handover method in this embodiment can implement switching between the SM and the UPF based on the architecture of FIG. 1.
  • the messages of step 7 and step 8 may be routed through the target mobility management network element target MM (if the signaling of the RAN and the core network CN is uniformly routed through the MM), or may directly pass through the RAN and the SM. Pass-through between interfaces (if there is a direct interface between RAN and SM)
  • FIG. 3 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • RAN2 sends a path switch request to the MM.
  • the MM determines that the SM needs to be switched for the UE, and the SM2 is selected as the target SM.
  • the MM sends the address of the SM2 to the RAN2.
  • the address of the SM2 may be sent to the RAN2 in the path switch request response.
  • the RAN2 sends the UE ID, the address of the SM1, the fifth parameter, and the sixth parameter to the SM2 according to the address of the SM2.
  • the UE ID, the address of the SM1, the fifth parameter, and the sixth parameter may be carried in the change bearer request. Send it to SM2.
  • the SM2 sends an SM relocation request carrying the UE ID to the SM1 according to the address of the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response and sent to the SM2.
  • SM1 also sends related parameters of the UE bearer context to SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response response and sent to the SM1.
  • the second parameter may also be sent to SM1 in the SM relocation request carried in step 5, in which case step 7 is not needed.
  • the SM1 may send the first parameter and the second parameter to the UPF1.
  • the SM2 may send the first parameter, the second parameter, the third parameter, and the fifth parameter to the UPF2.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2.
  • the fifth parameter and the sixth parameter may be carried in the change bearer response and sent to the RAN2.
  • the messages of steps 4 and 9 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (if there is a direct interface between RAN and SM)
  • FIG. 4 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • the RAN2 sends the fifth parameter and the sixth parameter to the MM.
  • the fifth parameter and the sixth parameter may be carried in the path switching request and sent to the MM.
  • the MM determines that the SM needs to be switched for the UE, and the SM2 is selected as the target SM.
  • the MM sends the UE ID, the fifth parameter, the sixth parameter, the information indicating the address of the RAN2, and the address of the SM2 to the SM1. Specifically, the UE ID, the fifth parameter, the sixth parameter, the information indicating the address of the RAN2, and the SM2.
  • the address can be carried in the SM relocation notification and sent to SM1.
  • the SM1 sends the UE ID, the information indicating the address of the RAN2, and the fifth parameter and the sixth parameter to the SM2.
  • the UE ID, the information indicating the address of the RAN2, and the fifth parameter and the sixth parameter may be carried in the SM relocation.
  • the request is sent to SM2.
  • SM1 also sends related parameters of the UE bearer context to SM2.
  • the SM2 sends the second parameter, the third parameter, and the fourth parameter to the SM1.
  • the second parameter, the third parameter, and the fourth parameter may be carried in the SM relocation response and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response response and sent to the SM2.
  • the first parameter may also be sent to SM2 in step 4, in which case step 6 may not be needed.
  • the SM1 sends the third parameter and the fourth parameter to the MM.
  • the third parameter and the fourth parameter may be carried in the SM relocation notification response and sent to the MM.
  • step 8 may be performed after step 5, without limiting the order with step 6, 7a or 7b.
  • the MM sends the third parameter and the fourth parameter to the RAN2.
  • the third parameter may be carried in the path switch request response and sent to the RAN2.
  • FIG. 5 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • RAN2 sends a path switch request to the MM.
  • the MM sends a path switch request response to RAN2.
  • RAN2 determines that the SM needs to be switched for the UE, and selects SM2 as the target SM.
  • the RAN2 sends the UE ID, the address of the SM1, the fifth parameter, and the sixth parameter to the SM2.
  • the UE ID, the address of the SM1, the fifth parameter, and the sixth parameter may be carried in the change bearer request and sent to the SM2.
  • the SM2 sends the UE ID to the SM1 according to the address of the SM1.
  • the UE ID may be carried in the SM relocation request and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response and sent to the SM2.
  • SM1 also sends related parameters of the UE bearer context to SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response response and sent to the SM1.
  • the second parameter can be sent to SM1 in step 5, in which case step 7 is not required.
  • 8b and SM2 perform user plane parameter configuration for UPF2.
  • 8b can be executed after step 6, and is not limited to execution after step 7.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2. Specifically, the third parameter and the fourth parameter may be sent to the RAN2 in the change bearer response.
  • steps 1 and 2 and steps 3-9 are not limited.
  • the messages of steps 4 and 9 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 9 may be performed after step 4 and before step 5.
  • FIG. 6 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • RAN2 sends a path switch request to the MM.
  • the MM sends a path switch request response to RAN2.
  • the RAN1 sends information indicating the address of the RAN2 to the SM1.
  • the information indicating the address of the RAN2 may be carried in the handover report and sent to the SM1.
  • SM1 sends a handover report response to RAN1.
  • SM1 determines that the SM needs to be switched for the UE, and selects SM2 as the target SM.
  • the SM1 sends the UE ID and the information indicating the address of the RAN2 to the SM2. Specifically, the information of the UE ID and the address indicating the RAN2 may be carried in the SM relocation request and sent to the SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response response and sent to the SM2.
  • the first parameter can be sent to SM2 in step 5, in which case step 7 is not required.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2 according to the information indicating the address of the RAN2. Specifically, the third parameter and the fourth parameter may be sent to the RAN2 in the change bearer request.
  • the RAN2 sends the fifth parameter and the sixth parameter to the SM2.
  • the fifth parameter and the sixth parameter may be carried in the change bearer response and sent to the SM2.
  • the upstream and downstream user plane data channels between UPF2 and RAN2 have been established.
  • the uplink and downlink control plane signaling channels between SM2 and RAN2 have been established.
  • the data channel between UPF1 and UPF2 has been established.
  • SM1 may send related parameters of the UE bearer context to SM2 through step 5 or 7.
  • the messages of steps 8 and 9 may pass the target MM. Routing (if the signaling of the RAN and the core network CN is unified through the MM route), it is also possible to directly pass the interface between the RAN and the SM (if there is a direct interface between the RAN and the SM).
  • the messages of step 3a and step 3b may be routed through the source MM (if the signaling of the RAN and the core network CN is unified through the MM route), or directly through the interface between the RAN and the SM (if there is a direct connection between the RAN and the SM) interface).
  • step 3b may be omitted; or, if 3b exists, it may be executed after steps 5-7 and 8-9 are completed.
  • steps 8-9 may be performed after step 5 and before step 6.
  • steps 1 and 2 and steps 3-9 are not limited.
  • FIG. 7a is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • the RAN2 sends a path switch request to the MM.
  • the path switch request may further carry information indicating the address of the RAN2.
  • the MM sends a path switch request response to RAN2.
  • the MM sends the UE ID and the information indicating the address of the RAN2 to the SM1. Specifically, the UE ID and the information indicating the address of the RAN2 may be carried in the location change notification and sent to the SM1.
  • SM1 sends a location change notification response to the MM.
  • SM1 decides that the SM needs to be switched for the UE, and SM2 is selected as the target SM.
  • the SM1 sends the UE ID to the SM2, and the UE ID can be carried in the SM relocation request and sent to the SM2.
  • information indicating the address of the RAN2 may be sent to the SM2 in this step, and the information indicating the address of the RAN2 may also be sent to the SM2 subsequently, as long as it is sent to the SM2 before the step 8.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response response and sent to the SM2.
  • the first parameter can be sent to SM2 in step 5, in which case step 7 is not required.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2.
  • the third parameter and the fourth parameter may be carried in the change bearer request and sent to the RAN2.
  • the RAN2 sends the fifth parameter and the sixth parameter to the SM2.
  • the fifth parameter and the sixth parameter may be carried in the change bearer response and sent to the SM2.
  • the messages of step 8 and step 9 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 3b may be omitted; or, if step 3b exists, it may be performed after steps 5-7 and 8-9 are completed.
  • step 2 may be performed after the target MM receives the step 3b.
  • steps 8-9 may be performed after step 5 and before step 6.
  • step 5 or 7 parameters of the UE bearer context may also be included.
  • steps 1 and 2 and steps 3-9 are not limited.
  • FIG. 7b is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • the RAN2 sends a path switch request to the MM.
  • the path switch request may further carry information indicating the address of the RAN2.
  • the MM sends the UE ID and the information indicating the address of the RAN2 to the SM1. Specifically, the information of the UE ID and the address indicating the RAN2 may be carried in the location change notification and sent to the SM1.
  • SM1 decides that the SM needs to be switched for the UE, and SM2 is selected as the target SM.
  • the SM1 sends the UE ID to the SM2, and the UE ID can be carried in the SM relocation request and sent to the SM2.
  • information indicating the address of the RAN2 may also be sent to the SM2 in this step.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2.
  • the third parameter and the fourth parameter may be carried in the change bearer request and sent to the RAN2.
  • the RAN2 sends the fifth parameter and the sixth parameter to the SM2.
  • the fifth parameter and the sixth parameter may be carried in the change bearer response and sent to the SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response response and sent to the SM2.
  • the first parameter can be sent to SM2 in step 4, in which case step 8 is not required.
  • SM1 sends a location change notification response to the MM.
  • the MM sends a path switch request response to the RAN2.
  • the messages of step 5 and step 6 may pass the target MM path.
  • the messages of step 5 and step 6 may pass the target MM path.
  • FIG. 8 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • the RAN2 sends a path switch request to the MM.
  • the path switch request may carry information indicating the address of the RAN2.
  • the MM sends the UE ID and the information indicating the address of the RAN2 to the SM1.
  • the information indicating the address of the RAN2 may be carried in the location change notification and sent to the SM1.
  • SM1 decides that the SM needs to be switched for the UE, and SM2 is selected as the target SM.
  • the SM1 sends the address of the SM2 to the MM.
  • the address of the SM2 is carried in the location change notification response and sent to the MM.
  • the MM sends the address of the SM2 to the RAN2.
  • the address of the SM2 is carried in the path switch request response and sent to the RAN2.
  • the RAN2 sends the UE ID, the address of the SM1, and the fifth parameter and the sixth parameter to the SM2.
  • the optional UE ID, the address of the SM1, the fifth parameter, and the sixth parameter may be carried in the change bearer request and sent to the SM2.
  • SM2 sends the UE ID to SM1.
  • the UE ID may be carried in the SM relocation request and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response and sent to the SM2.
  • the SM2 sends a second parameter to the SM1.
  • the second parameter may be carried in the SM relocation response response and sent to the SM1.
  • the second parameter can also be sent to SM1 in step 7, in which case step 9 is not required.
  • the SM2 sends the third parameter and the fourth parameter to the RAN2.
  • the third parameter and the fourth parameter may be carried in the change bearer response and sent to the RAN2.
  • the messages of step 6 and step 10 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 8 related parameters of the UE bearer context may also be included.
  • FIG. 9 is still another switching method disclosed in the embodiment of the present application, including the following steps:
  • RAN2 sends a path switch request to the MM.
  • the MM sends a path switch request response to RAN2.
  • the RAN2 sends the fifth parameter and the sixth parameter to the SM1.
  • the fifth parameter and the sixth parameter may be carried in the change bearer request and sent to the SM1.
  • SM1 decides that the SM needs to be switched for the UE, and SM2 is selected as the target SM.
  • the SM1 sends the UE ID, the fifth parameter, and the sixth parameter to the SM2.
  • the UE ID, the fifth parameter, and the sixth parameter may be carried in the SM relocation request and sent to the SM2.
  • the SM2 sends the second parameter, the third parameter, and the fourth parameter to the SM1.
  • the second parameter, the third parameter, and the fourth parameter may be carried in the SM relocation response and sent to the SM1.
  • the SM1 sends the first parameter to the SM2.
  • the first parameter may be carried in the SM relocation response response and sent to the SM2.
  • the first parameter can also be sent to SM2 in step 5, in which case step 7 is not required.
  • the SM1 sends the third parameter and the fourth parameter to the RAN2.
  • the third parameter and the fourth parameter may be carried in the change bearer response and sent to the RAN2.
  • the message of step 3 and step 9 may be routed through the source MM or the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may directly pass between the RAN and the SM.
  • the delivery of the interface if there is a direct interface between the RAN and the SM).
  • step 5 or 7 related parameters of the UE bearer context may also be included.
  • FIG. 2 to FIG. 9 are only for exemplification, and different embodiments may be referred to each other, and details are not described herein again.
  • the source SM and the target SM may be the same SM functional entity. That is to say, whether it is MM, SM or RAN2, when selecting the target SM, it may be selected to select the source SM as the target SM.
  • the source SM and the target SM may be the same SM functional entity, but the control plane signaling channel between the target RAN2 and the SM still needs to be updated.
  • UPF1 and UPF2 may also be the same.
  • the UE data channel information in the UPF is updated, that is, similar to the above embodiment, the UPF needs to update and establish a username data channel between the RAN2 and the RAN2.
  • the parameters used to establish the user plane data channel are still negotiated by the RAN and SM.
  • UPF1 and UPF2 may not be the same. That is, the SM controls multiple UPFs. Although the source SM and the target SM are the same, different UPFs can be selected. In this case, The establishment of a data channel between UPF1 and UPF2 is still required.
  • the above is based on the switching of the X2 interface between the base stations.
  • the embodiment of the present application further discloses switching based on the S1 interface between the eNB and the MME.
  • the S1 handover is different from the MM participation process. That is, the SM participation process is nested in the MM participation process.
  • the SM participation process is the same as the X2 handover, and is not described here. For details, see Figures 10 to 25.
  • step 7 is performed to trigger the establishment of a data channel between the UPF1 and the UPF2 between the SM2 and the SM1, and the update between the SM2 and the RAN2 establishes a bearer between the RAN2 and the UPF2.
  • the target MM can be considered that the RAN2 successfully allocates the air interface radio resource for the UE.
  • the target MM receives the SM relocation notification response of the step 12, it means that the bearer update is successfully performed.
  • the target MM may consider that the RAN2 successfully allocates the air interface radio resource for the UE and successfully performs the update establishment of the bearer, thereby continuing to trigger the subsequent steps.
  • the fifth step can be performed after the tenth step.
  • the messages of steps 9 and 10 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM (if There is a direct interface between RAN and SM).
  • step 8b parameters of the UE bearer context may also be included.
  • the Target MM selects the target SM2 and notifies the RAN2 of the SM2 address through the handover request.
  • the RAN2 and the SM2 initiate the update establishment process of the bearer.
  • the RAN2 receives the change bearer response of the eighth step, it means that the bearer is successfully carried. Update.
  • the RAN2 sends a handover request response to the target MM, and the target MM can consider that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent step. Step.
  • the messages of steps 6 and 8 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM (if There is a direct interface between RAN and SM).
  • step 7b parameters of the UE bearer context may also be included.
  • the Target MM selects SM2.
  • RAN2 After receiving the handover request from the target MM, RAN2 initiates the update establishment process of the bearer with SM2 through MM and SM1.
  • RAN2 receives the change bearer request response of step 12, it means success.
  • the hosted update was made.
  • RAN2 returns a handover request response to target MM.
  • the target MM After the target MM receives the handover request response of the 14th step, it can be considered that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • step 6 may be performed after step 3 and before step 4, and the address of SM2 is carried in step 4.
  • step 8 or 10 parameters of the UE bearer context may also be included.
  • RAN2 and SM2 initiate the update establishment process of the bearer.
  • RAN2 receives step 8 it means that the bearer update is successfully performed.
  • the target MM may consider that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • the messages of step 6 and step 8 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 7b parameters of the UE bearer context may also be included.
  • RAN2 and SM2 initiate the update establishment process of the bearer.
  • RAN2 performs step 8b, it means that the bearer update is successfully performed.
  • the RAN2 sends a handover request response to the target MM, and the target MM can consider that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • the messages of step 8a and step 8b may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • the messages of step 5a and step 5b may be routed through the source MM (if the signaling of the RAN and the core network CN is unified through the MM route), or directly through the interface between the RAN and the SM (if there is a direct connection between the RAN and the SM) interface).
  • step 5b may be omitted; or, if step 5b exists, it may be performed after steps 7a-7c and steps 8a-8b are completed.
  • steps 8a-8b may be performed after step 7a and before step 7b.
  • step 7a or 7c parameters of the UE bearer context may also be included.
  • RAN2 after receiving the handover request, RAN2 sends a handover request response to the target MM. Then, RAN2 and SM2 initiate an update establishment process of the bearer. When RAN2 performs step 10b, it means that the bearer update is successfully performed. At this point, target SM2 triggers the subsequent steps.
  • source RAN1 receives step 6 (if step 6) and step 14, it can be considered that RAN2 successfully allocates air interface radio resources for the UE and has successfully performed the bearer update. This continues to trigger subsequent steps.
  • the RAN2 allocates the air interface radio resource to the UE, and may notify the source RAN1 through the step 4b, the step 5 (if any), the step 6 (if any), or the RAN2 allocates the air interface radio resource to the UE.
  • Step 10b, step 11, and step 14 are notified to source RAN1.
  • the message of step 7 and step 14 may be routed through the source source MM (if the signaling of the RAN and the core network CN is unified through the MM route), or directly through the interface between the RAN1 and the SM1. Pass (if there is a direct interface between the RAN and the SM).
  • the message of step 10a and step 10b may be routed through the target target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between RAN2 and SM2 (if there exists between the RAN and the SM) Direct interface)
  • steps 10a and 10b may be performed after step 12.
  • step 9 or 12 parameters of the UE bearer context may also be included.
  • RAN2 after receiving the handover request, RAN2 sends a handover request response to the target MM.
  • the target MM sends a location change notification to source SM1 to trigger SM1 to select SM2 and in turn trigger an update setup procedure for the bearer between SM2 and RAN2.
  • RAN2 and SM2 initiate an update establishment process of the bearer.
  • RAN2 performs step 9b, it means that the bearer update is successfully performed.
  • target SM2 triggers the subsequent steps.
  • the target MM receives the step 13 it can be considered that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • the RAN2 allocates air interface radio resources to the UE.
  • the target MM is notified to the target MM.
  • the RAN2 allocates the air interface radio resource to the UE by using the step 9b, step 10, and step 13 to notify the target MM.
  • the message of step 9a and step 9b may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 8 or 11 parameters of the UE bearer context may also be included.
  • the Target MM sends a handover request to RAN2; at the same time, the target MM sends a location change notification to source SM1 to trigger SM1 to select SM2 and in turn trigger an update setup procedure for the bearer between SM2 and RAN2.
  • RAN2 and SM2 initiate an update establishment process of the bearer.
  • RAN2 performs step 9b, it means that the bearer update is successfully performed.
  • RAN2 returns a handover request response to target MM.
  • target MM receives the handover request response in step 11, it can be considered that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • step 6 may be omitted.
  • the message of step 9a and step 9b may be routed through the target target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or directly through the interface between the RAN and the SM. Pass (if there is a direct interface between the RAN and the SM).
  • step 8a or 8c parameters of the UE bearer context may also be included.
  • Step 18 After Source SM1 selects target SM2, the address information of SM2 is passed. Steps 6 and 7 are sent to RAN2. Then, RAN2 and SM2 initiate an update establishment process of the bearer. When RAN2 receives SM2 and returns to step 10, it means that the bearer update is successfully performed. At this time, RAN2 returns a handover request response to target MM. After the target MM receives the step 12, it can be considered that the RAN2 successfully allocates the air interface radio resource for the UE and has successfully performed the update of the bearer, thereby continuing to trigger the subsequent steps.
  • the message of step 8 and step 10 may be routed through the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may be directly transmitted through the interface between the RAN and the SM. (If there is a direct interface between the RAN and the SM).
  • step 9b parameters of the UE bearer context may also be included.
  • the RAN2 after receiving the handover request of the target MM, the RAN2 initiates an update establishment process of the bearer with the SM2 through the SM1.
  • the RAN2 receives the step 8
  • RAN2 returns a handover request response to target MM.
  • the target MM receives the step 10
  • the message of step 5 and step 8 may be routed through the source MM or the target MM (if the signaling of the RAN and the core network CN is unified through the MM route), or may directly pass between the RAN and the SM.
  • the delivery of the interface if there is a direct interface between the RAN and the SM).
  • step 7a or 7c parameters of the UE bearer context may also be included.
  • FIG. 20 is a mobility management network element according to an embodiment of the present disclosure, including: a processor and a communication component, and optionally, a memory.
  • the processor is configured to determine a handover of the session management SM for the user equipment UE, and select a target session management SM network element.
  • the communication component is configured to trigger the establishment process of the target SM network element to perform a channel.
  • the embodiment of the present application further discloses an SM network element, including a processor and a communication component, and possibly a memory.
  • the processor is configured to determine the SM handover for the UE and select the target SM network element.
  • the communication component is configured to trigger the establishment process of the target SM network element to perform a channel.
  • the SM network element may be the source SM network element or the target SM network element in practice.
  • the process of establishing each channel as the target SM network element may be referred to FIG. 2 to FIG.
  • the embodiment of the present application further discloses a base station, including: a processor and a communication component.
  • the processor is configured to determine the SM handover for the UE and select the target SM network element.
  • a communication component configured to trigger a process of establishing the target SM network element channel.

Abstract

本申请提供了一种切换方法,包括:移动性管理网元决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元,所述移动性管理网元触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道,以使得基于CP和UP分离且CP中的MM和SM分离的网络的切换成为可能。

Description

一种切换方法及装置
本申请要求于2016年7月01日提交的、申请号为PCT/CN2016/088189、发明名称为“一种切换方法及装置”的PCT申请的优先权,其内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,尤其涉及一种切换方法及装置。
背景技术
移动通信技术的更新换代,势必会给各行各业带来许多创新应用,移动宽带、多媒体、机器类通信、工业控制和智能交通系统将成为5G时代的主要用例。为了满足广泛变化的业务需求,5G网络将以灵活的方式构建。其中,一种潜在的方向是控制面(control plane,CP)和用户面(user plane,UP)功能分离,CP中的MM(Mobility Management,移动性管理)和SM(Session Management,会话管理)功能分离。
5G的网络切片包括控制面功能(control plane function,CPF)实体和用户面功能(user plane function,UPF)实体。其中,CPF实体主要完成设备接入鉴权、安全加密、位置注册等MM功能,以及用户面传输路径的建立、释放和更改等SM功能;UPF实体主要完成用户面数据的路由转发等功能。
图1为网络切片的一种架构的示意图:
核心网络中存在多个SM网元和UPF实体,而共用一个MM(Mobility Management,通用移动性管理)实体。RAN与MM有信令接口,RAN与UPF有数据面接口。User Data数据库与MM有信令接口;User Data数据库与SM 有信令接口。MM还可能与各个网络切片的SM之间有信令接口。RAN与SM可以有信令接口,RAN与SM也可以没有直接接口,而是需要MM来中转它们之间的信令。
而目前,还没有一种基于图1所示的架构的切换方法。
发明内容
本申请提供了一种切换方法及装置,目的在于提供一种基于CP和UP分离且CP中的MM和SM分离的网络的切换方法及装置。
本申请的第一方面提供了一种切换方法,包括:移动性管理网元决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元,所述移动性管理网元触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道,以使得基于CP和UP分离且CP中的MM和SM分离的网络的切换成为可能。
本申请的第二方面提供了一种移动性管理网元,包括处理器和通信组件。处理器用于决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元。通信组件用于触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
在一种实现方式中,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:所述移动性管理网元向所述目标SM网元发送用户设备的标识UE ID、源SM网元的地址和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
在一种实现方式中,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:所述移动性管理网元向所述目标基站发送目标SM网元的地址。所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址以及用于建立所述UPF2和所述目标基站之间的用户面数据通道并用于下行传输的参数。
在一种实现方式中,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:所述移动性管理网元向源SM网元发送UE ID、指示所述目标基站的地址的信息和所述目标SM网元的地址。所述源SM网元依据所述目标SM网元的地址,向所述目标SM网元发送所述UE ID、所述指示所述目标基站的地址的信息和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
在一种实现方式中,在所述移动性管理网元决定为UE进行SM的切换,并选择目标SM之前,还包括:所述移动性管理网元接收目标基站发送的所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
本申请的第三方面提供了一种切换方法,包括:源SM网元决定为UE进行SM的切换,并选择目标SM网元。所述源SM网元触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
本申请的第三方面提供了一种SM网元,包括:处理器和通信组件。处理器用于决定为UE进行SM的切换,并选择目标SM网元。通信组件用于触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用 户面功能实体和目标基站之间的用户面数据通道。
在一种实现方式中,所述源SM网元触发所述目标SM网元进行通道的建立过程包括:所述源SM网元向所述目标SM网元发送UE ID和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
在一种实现方式中,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:所述源SM网元接收源基站发送的触发SM重定向的消息。
在一种实现方式中,所述触发SM重定向的消息包括目标基站的地址或者用于映射到所述目标基站的地址的信息。
在一种实现方式中,所述源SM网元触发所述目标SM网元进行通道的建立过程包括:所述源SM网元向所述目标SM网元发送UE ID和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
在一种实现方式中,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:所述移动管理网元向所述源SM网元发送所述UE ID和所述所述目标基站的地址的信息。
在一种实现方式中,所述源SM网元触发所述目标SM网元进行通道的建立过程包括:所述源SM网元向移动管理网元发送目标SM网元的地址。所述移动管理网元向目标基站发送所述目标SM网元的地址。所述目标基站向所述目标SM网元发送所述UE ID、所述源SM网元的地址以及用于建立所述UPF2和所述目标基站之间的用户面数据通道并用于下行传 输的参数。
在一种实现方式中,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:所述移动管理网元将指示所述目标基站的地址的信息和UE ID发给所述源SM网元,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
在一种实现方式中,所述源SM网元触发所述目标SM进行通道的建立过程包括:所述源SM网元向所述目标SM网元发送UE ID和用于建立所述UPF2和所述目标基站之间的用户面数据通道并用于下行传输的参数。
在一种实现方式中,在源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:所述目标基站向所述源SM网元发送所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
本申请的第五方面提供了一种切换方法,包括:目标基站决定为UE进行SM的切换,并选择目标SM网元。所述目标基站触发所述目标SM网元通道的建立过程,所述通道包括目标用户面功能实体和目标基站之间的用户面数据通道。
本申请的第六方面提供了一种基站包括处理器和通信组件。处理器用于决定为UE进行SM的切换,并选择目标SM网元。通信组件,用于触发所述目标SM网元通道的建立过程,所述通道包括目标用户面功能实体和目标基站之间的用户面数据通道。
在一种实现方式中,所述目标基站触发所述目标SM网元进行通道的建立过程包括:所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并进行下行传输的参数。在一种实现方式中,所述目标SM网元进行通道的建立过程包括:所述目标SM网元依据与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道的参数。
在一种实现方式中,所述通道还包括:源用户面功能实体和所述目标用户面功能实体之间的数据通道。
在一种实现方式中,所述目标SM网元进行通道的建立过程还包括:所述目标SM网元与所述源SM网元交互用于建立所述源用户面功能实体和所述目标用户面功能实体之间的数据通道的参数。
在一种实现方式中,所述通道还包括:所述目标SM网元和所述目标基站之间的控制面信令通道。
在一种实现方式中,所述目标SM网元进行通道的建立过程还包括:所述目标SM网元与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附 图。
图1为本发明实施例公开的一种通信架构的示意图;
图2为本发明实施例公开的一种切换方法的流程图;
图3为本发明实施例公开的又一种切换方法的流程图;
图4为本发明实施例公开的又一种切换方法的流程图;
图5为本发明实施例公开的又一种切换方法的流程图;
图6为本发明实施例公开的又一种切换方法的流程图;
图7a为本发明实施例公开的又一种切换方法的流程图;
图7b为本发明实施例公开的又一种切换方法的流程图;
图8为本发明实施例公开的又一种切换方法的流程图;
图9为本发明实施例公开的又一种切换方法的流程图;
图10为本发明实施例公开的又一种切换方法的流程图;
图11为本发明实施例公开的又一种切换方法的流程图;
图12为本发明实施例公开的又一种切换方法的流程图;
图13为本发明实施例公开的又一种切换方法的流程图;
图14为本发明实施例公开的又一种切换方法的流程图;
图15为本发明实施例公开的又一种切换方法的流程图;
图16为本发明实施例公开的又一种切换方法的流程图;
图17为本发明实施例公开的又一种切换方法的流程图;
图18为本发明实施例公开的又一种切换方法的流程图;
图19为本发明实施例公开的又一种切换方法的流程图;
图20为本发明实施例公开的一种移动性管理网元的结构示意图。
具体实施方式
基于图1所示的网络架构,在切换前,假设源基站为RAN1,源SM网元为SM1,源UPF实体为UPF1。UE在无线接入网侧从源基站切换到目标基站(以下称为RAN2)后,需要进行运营商网络侧的切换,运营商网络侧切换的目标为:使得源UPF实体(以下称为UPF1)与目标UPF实体(以下称为UPF2)之间建立数据传输通道,UPF2和RAN2之间建立上、下行用户面数据通道、目标SM网元SM2和RAN2之间建立上、下行控制面信令通道。
下面将结合附图,对于上述目标的实现进行详细的说明。
图2为本申请实施例公开的一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求。
2、MM(图2~图8的中,MM均指目标MM)决定需要为UE进行SM的切换,并将SM2选择为目标SM。
3、MM向SM2发送UE ID、指示RAN2的地址的信息以及SM1的地址,可选的,UE ID、指示RAN2的地址的信息以及SM1的地址可以携带SM重定位通知中发给SM2。
具体的,在本实施例以及以下实施例中,指示RAN2的地址的信息可以为RAN2的地址(比如,基站标识),也可以为用于映射到RAN2的地址的信息(比如,小区标识信息)。
4、SM2依据SM1的地址,向SM1发送UE ID,可选的,UE ID可以携带在SM重定位请求中发给SM1。
5、SM1向SM2发送第一参数,可选的,第一参数可以携带在SM重 定位响应中发给SM2。
具体的,第一参数用于为UE建立UPF2和UPF1之间的数据传输通道,目的在于使得UPF1能够识别出UPF2发送的数据属于哪个UE。
可选地,SM1还向SM2发送了UE承载上下文的相关参数。
6、SM2向SM1发送第二参数,可选的,第二参数可以携带在SM重定位响应应答中发给SM1。
具体的,第二参数用于为UE建立UPF2和UPF1之间的数据传输通道,目的在于使得UPF2能够识别出UPF1发送的数据。
可选地,第二参数还可以被携带在第4步的SM重定位请求中发给SM2,在此情况下,则无需第6步。
7、SM2依据指示RAN2的地址的信息,向RAN2发送第三参数和第四参数,具体的,第三参数和第四参数可以携带在更改承载请求中发给RAN2,第三参数和第四参数可能携带在一条消息中发给RAN2,也可能分别携带在两条消息中分别发给RAN2。
具体的,第三参数用于为UE建立UPF2和RAN2之间的数据传输通道,RAN2向SM2发送上行用户面数据时使用,目的在于使得UPF2能够识别RAN2发送的上行用户面数据。
第四参数用于为UE建立RAN2和SM2之间的信令传输通道,RAN2向SM2发送上行控制面信令时使用,目的在于使得SM2能够识别RAN2发送的上行控制面信令。
8、RAN2向SM2发送第五参数和第六参数,具体的,第五参数和第六参数可以携带在更改承载响应中发给SM2。
具体的,第五参数用于UPF2向RAN2发送下行用户面数据时使用,目的在于使得RAN2能够识别UPF2发送的下行用户面数据。
第六参数用于为UE建立RAN2和SM2之间的信令传输通道,SM2向RAN2发送下行控制面信令时使用,目的在于使得RAN2能够识别SM2发送的下行控制面信令。
9a、SM1为UPF1进行用户面参数配置,具体的,SM1为UPF1进行用户面参数配置可以包括SM1将第一参数和第二参数发给UPF1。
9b、SM2为UPF2进行用户面参数配置,具体的,SM2为UPF2进行用户面参数配置可以包括SM2将第一参数、第二参数、第三参数和第五参数发给UPF2。
可选的,SM可以通过更新内容配置的方式将参数发给相应的UPF。
可选的,SM1将第一参数和第二参数发给UPF1在步骤6之后就可以执行,而不限定在步骤7或8之后执行。
至此,UPF1和UPF2之间的数据通道已经建立。UPF2和RAN2之间的上、下行用户面数据通道已经建立。SM2和RAN2之间的上、下行控制面信令通道已经建立。
可选的,图2中还可以包括以下步骤:
10、SM2向MM发送SM重定位通知应答。可选地,步骤7中的第三参数和第四参数可以在该步骤10中带给RAN2,在此情况下,无需步骤7。
11、MM向RAN2发送路径切换请求应答。可选地,该步骤可以在第1步之后就执行。
需要说明的是,图2中的步骤3~8的执行顺序并不做限定。
需要说明的是,在本实施例以及后续实施例中,第三参数、第四参数、第五参数和第六参数的传输可能经过其它核心网节点转发,比如MM和/或消息转发实体,所述消息转发实体可以为NAS代理节点。
从图2可以看出,本实施例中的切换方法,能够基于图1的架构实现SM和UPF之间的切换。
需要说明的是,可选地,步骤7和步骤8的消息可能经过目标移动性管理网元target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)
图3为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求。
2、MM决定需要为UE进行SM的切换,并将SM2选择为目标SM。
3、MM向RAN2发送SM2的地址,可选的,SM2的地址可以携带路径切换请求应答中发给RAN2。
4、RAN2依据SM2的地址向SM2发送UE ID、SM1的地址、第五参数和第六参数,可选的,UE ID、SM1的地址、第五参数和第六参数可以携带在更改承载请求中发给SM2。
5、SM2依据SM1的地址,向SM1发送携带UE ID的SM重定位请求。
6、SM1向SM2发送第一参数,可选的,第一参数可以携带在SM重定位响应中发给SM2。
可选地,SM1还向SM2发送了UE承载上下文的相关参数。
7、SM2向SM1发送第二参数,可选的,第二参数可以携带在SM重定位响应应答中发给SM1。可选地,第二参数还可以被携带在第5步的SM重定位请求中发给SM1,在此情况下,则无需第7步。
8a、SM1为UPF1进行用户面参数配置,具体的,可以包括SM1将第一参数和第二参数发给UPF1。
8b、SM2为UPF2进行用户面参数配置,具体的,可以包括SM2将第一参数、第二参数、第三参数和第五参数发给UPF2。
9、SM2向RAN2发送第三参数和第四参数,具体的,第五参数和第六参数可以携带在更改承载响应中发给RAN2。
需要说明的是,可选地,步骤4和步骤9的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)
图4为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送第五参数和第六参数,具体的,第五参数和第六参数可以携带在路径切换请求中发给MM。
2、MM决定需要为UE进行SM的切换,并将SM2选择为目标SM。
3、MM向SM1发送UE ID、第五参数、第六参数、指示RAN2的地址的信息和SM2的地址,具体的,UE ID、第五参数、第六参数、指示RAN2的地址的信息和SM2的地址可以携带在SM重定位通知中发给SM1。
4、SM1向SM2发送UE ID、指示RAN2的地址的信息和第五参数、第六参数,具体的,UE ID、指示RAN2的地址的信息和第五参数、第六参数可以携带在SM重定位请求中发给SM2。
可选地,SM1还向SM2发送了UE承载上下文的相关参数。
5、SM2向SM1发送第二参数和第三参数、第四参数,具体的,第二参数和第三参数、第四参数可以携带在SM重定位响应中发给SM1。
6、SM1向SM2发送第一参数,具体的,第一参数可以携带在SM重定位响应应答中发给SM2。可选的,第一参数也可以在第4步中发给SM2,在此情况下,可以无需第6步。
7a、SM1为UPF1进行用户面参数配置。
7b、SM2为UPF2进行用户面参数配置。
8、SM1将第三参数和第四参数发给MM,具体的,第三参数和第四参数可以携带在SM重定位通知应答中发给MM。可选地,步骤8可以在步骤5之后就执行,不限定与步骤6、7a或7b的顺序。
9、MM将第三参数和第四参数发给RAN2,具体的,第三参数可以携带在路径切换请求应答中发给RAN2。
图5为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求。
2、MM向RAN2发送路径切换请求应答。
3、RAN2决定需要为UE进行SM的切换,并选择SM2为目标SM。
4、RAN2向SM2发送UE ID、SM1的地址、第五参数和第六参数,具体的,UE ID、SM1的地址、第五参数和第六参数可以携带在更改承载请求中发给SM2。
5、SM2依据SM1的地址,向SM1发送UE ID,可选的,UE ID可以携带在SM重定位请求中发给SM1。
6、SM1向SM2发送第一参数,可选的,第一参数可以携带在SM重定位响应中发给SM2。
可选地,SM1还向SM2发送了UE承载上下文的相关参数。
7、SM2向SM1发送第二参数,可选的,第二参数可以携带在SM重定位响应应答中发给SM1。可选的,第二参数可以在第5步发给SM1,在此情况下,无需第7步。
8a、SM1为UPF1进行用户面参数配置。
8b、SM2为UPF2进行用户面参数配置。可选的,8b可以在第6步后执行,而不限于在第7步后执行。
9、SM2向RAN2发送第三参数和第四参数,具体的,第三参数和第四参数可以携带更改承载响应中发给RAN2。
需要说明的是,步骤1和2,与步骤3-9的执行顺序不作限定。
需要说明的是,可选地,步骤4和步骤9的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
需要说明的是,可选地,步骤9也可以在步骤4之后和步骤5之前就执行。
图6为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求。
2、MM向RAN2发送路径切换请求应答。
3a、RAN1向SM1发送指示RAN2的地址的信息,可选的,指示RAN2的地址的信息可以被携带在切换报告中发给SM1。
3b、SM1向RAN1发送切换报告应答。
4、SM1决定需要为UE进行SM的切换,并选择SM2为目标SM。
5、SM1向SM2发送UE ID和指示RAN2的地址的信息,具体的,UE ID和指示RAN2的地址的信息可以携带在SM重定位请求中发给SM2。
6、SM2向SM1发送第二参数,具体的,第二参数可以携带在SM重定位响应中发给SM1。
7、SM1向SM2发送第一参数,具体的,第一参数可以携带在SM重定位响应应答中发给SM2。可选的,第一参数可以在第5步中发给SM2,在此情况下,无需第7步。
8、SM2依据指示RAN2的地址的信息,向RAN2发送第三参数和第四参数,具体的,第三参数和第四参数可以携带更改承载请求中发给RAN2。
9、RAN2向SM2发送第五参数和第六参数,具体的,第五参数和第六参数可以携带在更改承载响应中发给SM2。
10a、SM1为UPF1进行用户面参数配置。
10b、SM2为UPF2进行用户面参数配置。
至此,UPF2和RAN2之间的上、下行用户面数据通道已经建立。SM2和RAN2之间的上、下行控制面信令通道已经建立。UPF1和UPF2之间的数据通道已经建立。
需要说明的是,可选地,SM1可以通过步骤5或7向SM2发送了UE承载上下文的相关参数。
需要说明的是,可选地,步骤8和步骤9的消息可能经过target MM 路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。步骤3a和步骤3b的消息可能经过source MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
需要说明的是,可选地,步骤3b可能可以省略;或者,如果3b存在,还可以在步骤5-7,步骤8-9执行完成之后再执行。
需要说明的是,可选地,步骤8-9可以在步骤5之后且在步骤6之前执行。
需要说明的是,步骤1和2,与步骤3-9的执行顺序不作限定。
图7a为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求,可选的,路径切换请求中还可以携带指示RAN2的地址的信息。
2、MM向RAN2发送路径切换请求应答。
3a、MM向SM1发送UE ID和指示RAN2的地址的信息,具体的,UE ID和指示RAN2的地址的信息可以携带在位置变化通知中发给SM1。
3b、SM1向MM发送位置变化通知应答。
4、SM1决定需要为UE进行SM的切换,并将SM2选择为目标SM。
5、SM1向SM2发送UE ID,UE ID可以携带在SM重定位请求中发给SM2。可选地,此步骤中还可以将指示RAN2的地址的信息发给SM2,指示RAN2的地址的信息也可以在后续发给SM2,只要在步骤8之前发给SM2即可。
6、SM2向SM1发送第二参数,可选地,第二参数可以携带在SM重定位响应中发给SM1。
7、SM1向SM2发送第一参数,可选地,第一参数可以携带在SM重定位响应应答中发给SM2。可选地,可以将第一参数在步骤5中发给SM2,在此情况下,则无需步骤7。
8、SM2向RAN2发送第三参数和第四参数,可选的,第三参数和第四参数可以携带在更改承载请求中发给RAN2。
9、RAN2向SM2发送第五参数和第六参数,可选的,第五参数和第六参数可以携带在更改承载响应中发给SM2。
10a、SM1为UPF1进行用户面参数配置。
10b、SM2为UPF2进行用户面参数配置。。
需要说明的是,可选地,步骤8、步骤9的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
需要说明的是,可选地,步骤3b可能可以省略;或者,如果步骤3b存在,还可以在步骤5-7,步骤8-9执行完成之后再执行。
需要说明的是,可选地,步骤2可以在target MM收到步骤3b之后执行。
需要说明的是,可选地,步骤8-9可以在步骤5之后且在步骤6之前执行。
另外,可选地,步骤5或7中,可能还包括了UE承载上下文的参数。
需要说明的是,步骤1和2,与步骤3-9的执行顺序不作限定。
图7b为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求,可选的,路径切换请求中还可以携带指示RAN2的地址的信息。
2、MM向SM1发送UE ID和指示RAN2的地址的信息,具体的,UE ID和指示RAN2的地址的信息可以携带在位置变化通知中发给SM1。
3、SM1决定需要为UE进行SM的切换,并将SM2选择为目标SM。
4、SM1向SM2发送UE ID,UE ID可以携带在SM重定位请求中发给SM2。可选地,此步骤中还可以将指示RAN2的地址的信息发给SM2。
5、SM2向RAN2发送第三参数和第四参数,可选的,第三参数和第四参数可以携带在更改承载请求中发给RAN2。
6、RAN2向SM2发送第五参数和第六参数,可选的,第五参数和第六参数可以携带在更改承载响应中发给SM2。
7、SM2向SM1发送第二参数,可选地,第二参数可以携带在SM重定位响应中发给SM1。
8、SM1向SM2发送第一参数,可选地,第一参数可以携带在SM重定位响应应答中发给SM2。可选地,可以将第一参数在步骤4中发给SM2,在此情况下,则无需步骤8。
9、SM1向MM发送位置变化通知应答。
10、MM向RAN2发送路径切换请求应答。
11a、SM1为UPF1进行用户面参数配置。
11b、SM2为UPF2进行用户面参数配置。
需要说明的是,可选地,步骤5、步骤6的消息可能经过target MM路 由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
图8为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求,可选的,路径切换请求中可以携带指示RAN2的地址的信息。
2、MM向SM1发送UE ID和指示RAN2的地址的信息,可选的,指示RAN2的地址的信息可以携带在位置变化通知中发给SM1。
3、SM1决定需要为UE进行SM的切换,并将SM2选择为目标SM。
4、SM1将SM2的地址发给MM,可选的,可以将SM2的地址携带在位置变化通知应答中发给MM。
5、MM向RAN2发送SM2的地址,可选的,可以将SM2的地址携带在路径切换请求应答中发给RAN2。
6、RAN2向SM2发送UE ID、SM1的地址和第五参数和第六参数,可选的UE ID、SM1的地址、第五参数和第六参数可以携带在更改承载请求中发给SM2。
7、SM2向SM1发送UE ID。可选的,UE ID可以携带在SM重定位请求中发给SM1。
8、SM1向SM2发送第第一参数,可选的,第一参数可以携带在SM重定位响应中发给SM2。
9、SM2向SM1发送第二参数,可选的,第二参数可以携带在SM重定位响应应答中发给SM1。可选的,第二参数也可以在第7步发给SM1,在此情况下,无需第9步。
10、SM2向RAN2发送第三参数和第四参数。可选的,第三参数和第四参数可以携带在更改承载响应中发给RAN2。
11a、SM1为UPF1进行用户面参数配置。
11b、SM2为UPF2进行用户面参数配置。
需要说明的是,可选地,步骤6和步骤10的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤8中,可能还包括了UE承载上下文的相关参数。
图9为本申请实施例公开的又一种切换方法,包括以下步骤:
1、RAN2向MM发送路径切换请求。
2、MM向RAN2发送路径切换请求应答。
3、RAN2向SM1发送第五参数和第六参数,可选的,第五参数和第六参数可以携带在更改承载请求中发给SM1。
4、SM1决定需要为UE进行SM的切换,并将SM2选择为目标SM。
5、SM1向SM2发送UE ID、第五参数和第六参数,可选的,UE ID、第五参数和第六参数可以携带在SM重定位请求中发给SM2。
6、SM2向SM1发送第二参数和第三参数、第四参数,可选的,第二参数和第三参数、第四参数可以携带在SM重定位响应中发给SM1。
7、SM1向SM2发送第一参数,具体的,第一参数可以携带在SM重定位响应应答中发给SM2。可选的,第一参数也可以在第5步中发给SM2,在此情况下,无需第7步。
8a、SM1为UPF1进行用户面参数配置。
8b、SM2为UPF2进行用户面参数配置。
9、SM1向RAN2发送第三参数和第四参数,具体的,第三参数和第四参数可以携带在更改承载响应中发给RAN2。
需要说明的是,可选地,步骤3,步骤9的消息可能经过source MM或者target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤5或7中,可能还包括了UE承载上下文的相关参数。
上述图2~图9仅为举例说明,不同的实施例之间可以相互参见,这里不再赘述。
需要说明的是,在以上实施例中,源SM和目标SM可以为同一个SM功能实体。也就是说,无论是MM、SM还是RAN2,在选择目标SM时,可能选择将源SM选择为目标SM。
在此情况下,源SM和目标SM可以为同一个SM功能实体,但目标RAN2和SM之间的控制面信令通道还是需要更新建立。
在此情况下,UPF1和UPF2可能也是同一个,此类情况下要进行UPF中UE数据通道信息的更新,即与上述实施例类似的,UPF要更新建立与RAN2之间的用户名数据通道,用于建立用户面数据通道的参数还是由RAN和SM来协商。
UPF1和UPF2也可能不是同一个,也就是说,SM控制多个UPF,虽然源SM和目标SM是同一个,但是,可以选择不同的UPF,在此情况下, 依然要进行UPF1和UPF2之间数据通道的建立。
以上均为基于基站之间的X2接口的切换,本申请实施例还公开了基于eNB和MME之间的S1接口的切换。与X2切换相比,S1切换的区别在于MM参与的流程,即SM参与的流程嵌套在MM参与的流程之中,SM参与的流程与X2切换相同,这里不再赘述。详情可参见图10~图25所示。
图10中,目标Target MM选择目标SM2之后,执行第7步以触发SM2与SM1之间建立UPF1和UPF2之间的数据通道,以及SM2与RAN2之间的更新建立RAN2和UPF2之间的承载。target MM收到第5步的切换请求应答之后,可以认为RAN2为UE成功分配了空口无线资源,当target MM收到第12步的SM重定位通知应答之后,意味着成功进行了承载的更新。此时,target MM可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新建立,从而继续触发后续的步骤。
需要说明的是,可选地,第5步可以在第10步之后执行。
需要说明的是,第9步和第10步的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,步骤8b中,可能还包括了UE承载上下文的参数。
图11中,Target MM选择目标SM2,并通过切换请求将SM2地址通知给RAN2,RAN2与SM2发起承载的更新建立过程,当RAN2收到第8步的更改承载响应之后,意味着成功进行了承载的更新。此时,RAN2向target MM发送切换请求应答,target MM可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步 骤。
需要说明的是,第6步和第8步的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,步骤7b中,可能还包括了UE承载上下文的参数。
图12中,Target MM选择SM2,接收到target MM的切换请求之后,RAN2通过MM和SM1,与SM2发起承载的更新建立过程,当RAN2接收到第12步的更改承载请求应答之后,意味着成功进行了承载的更新。此时,RAN2向target MM返回切换请求应答。当target MM接收到第14步的切换请求应答之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,第6步可以在步骤3之后以及步骤4之前执行,且SM2的地址携带在步骤4之中。
另外,可选地,步骤8或10中,可能还包括了UE承载上下文的参数。
图13中,收到切换请求并选择SM2之后,RAN2与SM2发起承载的更新建立过程,当RAN2收到步骤8之后,意味着成功进行了承载的更新。在RAN2向target MM发送切换请求应答的情况下,target MM可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,步骤6和步骤8的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤7b中,可能还包括了UE承载上下文的参数。
图14中,RAN2与SM2发起承载的更新建立过程,当RAN2执行步骤8b之后,意味着成功进行了承载的更新。此时,RAN2向target MM发送切换请求应答,target MM可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,步骤8a和步骤8b的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。步骤5a和步骤5b的消息可能经过source MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
需要说明的是,可选地,步骤5b可能可以省略;或者,如果步骤5b存在,还可以在步骤7a-7c,步骤8a-8b执行完成之后再执行。
需要说明的是,可选地,步骤8a-8b可以在步骤7a之后且在步骤7b之前执行。
另外,可选地,步骤7a或7c中,可能还包括了UE承载上下文的参数。
图15中,收到切换请求之后,RAN2向target MM发送切换请求应答。然后RAN2与SM2发起承载的更新建立过程,当RAN2执行步骤10b之后,意味着成功进行了承载的更新。此时,target SM2触发后续的步骤。当source RAN1接收到步骤6(如果有步骤6)和步骤14之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新, 从而继续触发后续的步骤。
需要说明的是,可选地,RAN2为UE分配空口无线资源可以通过步骤4b、步骤5(如果有)、步骤6(如果有)通知给source RAN1;或者,RAN2为UE分配空口无线资源可以通过步骤10b、步骤11、步骤14通知给source RAN1。
需要说明的是,可选地,步骤7、步骤14的消息可能经过源source MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN1和SM1之间的接口的传递(如果RAN和SM之间存在直接接口)。步骤10a、步骤10b的消息可能经过目标target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN2和SM2之间的接口的传递(如果RAN和SM之间存在直接接口)
需要说明的是,可选地,步骤5可能可以省略;步骤6可能可以省略。
需要说明的是,可选地,步骤10a和10b可以在步骤12之后执行。
另外,可选地,步骤9或12中,可能还包括了UE承载上下文的参数。
图16中,收到切换请求之后,RAN2向target MM发送切换请求应答。同时,target MM向source SM1发送位置变化通知,以触发SM1选择SM2并且进而触发SM2和RAN2之间的承载的更新建立过程。然后RAN2与SM2发起承载的更新建立过程,当RAN2执行步骤9b之后,意味着成功进行了承载的更新。此时,target SM2触发后续的步骤。当target MM接收到步骤13之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,RAN2为UE分配空口无线资源可以通过步 骤5,通知给target MM;或者,RAN2为UE分配空口无线资源可以通过步骤9b,步骤10,步骤13通知给target MM。
需要说明的是,可选地,步骤9a、步骤9b的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤8或11中,可能还包括了UE承载上下文的参数。
图17中,Target MM向RAN2发送切换请求;同时,target MM向source SM1发送位置变化通知,以触发SM1选择SM2并且进而触发SM2和RAN2之间的承载的更新建立过程。
然后RAN2与SM2发起承载的更新建立过程,当RAN2执行步骤9b之后,意味着成功进行了承载的更新。此时,RAN2向target MM返回切换请求应答。当target MM接收到步骤11中的切换请求应答之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,步骤6可能可以省略。
需要说明的是,可选地,步骤9a,步骤9b的消息可能经过目标target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤8a或8c中,可能还包括了UE承载上下文的参数。
图18中,Source SM1选择target SM2之后,将SM2的地址信息通过 步骤6和7发送给RAN2。然后RAN2与SM2发起承载的更新建立过程,当RAN2接收到SM2返回步骤10之后,意味着成功进行了承载的更新。此时,RAN2向target MM返回切换请求应答。当target MM接收到步骤12之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,步骤8,步骤10的消息可能经过target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤9b中,可能还包括了UE承载上下文的参数。
图19中,接收到target MM的切换请求之后,RAN2通过SM1,与SM2发起承载的更新建立过程,当RAN2接收到步骤8之后,意味着成功进行了承载的更新。此时,RAN2向target MM返回切换请求应答。当target MM接收到步骤10之后,可以认为RAN2为UE成功分配了空口无线资源并且已经成功进行了承载的更新,从而继续触发后续的步骤。
需要说明的是,可选地,步骤5,步骤8的消息可能经过source MM或者target MM路由(如果RAN和核心网CN的信令统一经过MM路由),也可能直接通过RAN和SM之间的接口的传递(如果RAN和SM之间存在直接接口)。
另外,可选地,步骤7a或7c中,可能还包括了UE承载上下文的参数。
需要说明的是,在图10~图19所示的S1切换的流程中,SM1和SM2之间交互的步骤除了如图10~图19所示之外,也可以简化为两步,两步流 程的具体方式可以参见X2切换的实施例的说明,这里不再赘述。
图20为本申请实施例公开的一种移动性管理网元,包括:处理器和通信组件,可选地,还可以包括存储器。处理器用于决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元。通信组件用于触发所述目标SM网元进行通道的建立过程。
其中,通信组件的具体功能实现过程可以参见图2~图19所示,这里不再赘述。
本申请实施例还公开了一种SM网元,包括处理器和通信组件,可能还包括存储器。处理器用于决定为UE进行SM的切换,并选择目标SM网元。通信组件用于触发所述目标SM网元进行通道的建立过程。
其中,通信组件的具体功能实现过程可以参见图2~图19所示,这里不再赘述。需要说明的是,SM网元在实际中既有可能是源SM网元,也有可能是目标SM网元,作为目标SM网元建立各个通道的过程可以参见图2~图19。
本申请实施例还公开了一种基站,包括:处理器和通信组件。处理器用于决定为UE进行SM的切换,并选择目标SM网元。通信组件,用于触发所述目标SM网元通道的建立过程。
通信组件的具体功能实现过程可以参见图2~图19所示,这里不再赘述。

Claims (64)

  1. 一种切换方法,其特征在于,包括:
    移动性管理网元决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元;
    所述移动性管理网元触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  2. 根据权利要求1所述的方法,其特征在于,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:
    所述移动性管理网元向所述目标SM网元发送用户设备的标识UE ID、源SM网元的地址和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  3. 根据权利要求2所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元依据所述目标基站的地址或者所述用于映射到所述目标基站地址的信息,与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道的参数。
  4. 根据权利要求1所述的方法,其特征在于,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:
    所述移动性管理网元向所述目标基站发送目标SM网元的地址;
    所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址以及用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通 道并用于下行传输的参数。
  5. 根据权利要求4所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元向所述目标基站发送用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道并用于上行传输的参数。
  6. 根据权利要求1所述的方法,其特征在于,所述移动性管理网元触发所述目标SM网元进行通道的建立过程包括:
    所述移动性管理网元向源SM网元发送UE ID、指示所述目标基站的地址的信息、所述目标SM网元的地址和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站的地址的信息;
    所述源SM网元依据所述目标SM网元的地址,向所述目标SM网元发送所述UE ID、所述指示所述目标基站的地址的信息和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  7. 根据权利要求6所述的方法,其特征在于,在所述移动性管理网元决定为UE进行SM的切换,并选择目标SM之前,还包括:
    所述移动性管理网元接收所述目标基站发送的所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  8. 根据权利要求6或7所述的方法,其特征在于,所述目标SM网元 进行通道的建立过程包括:
    所述目标SM网元依据所述目标基站的地址或者用于映射到所述目标基站的地址的信息,通过源SM网元和所述移动性管理网元向所述目标基站发送用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道并用于上行传输的参数。
  9. 根据权利要求1至8任一项所述的方法,其特征在于,所述通道还包括:
    源用户面功能实体和所述目标用户面功能实体之间的数据通道。
  10. 根据权利要求9所述的方法,其特征在于,所述目标SM网元进行通道的建立过程还包括:
    所述目标SM网元与所述源SM网元交互用于建立源用户面功能实体和所述目标用户面功能实体之间的数据通道的参数。
  11. 根据权利要求10所述的方法,其特征在于,还包括:
    所述目标SM网元接收源SM网元发送的所述UE的承载上下文相关的参数。
  12. 根据权利要求1至11任一项所述的方法,其特征在于,所述通道还包括:
    所述目标SM网元和所述目标基站之间的控制面信令通道。
  13. 根据权利要求12所述的方法,其特征在于,所述目标SM网元进行通道的建立过程还包括:
    所述目标SM网元与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
  14. 一种切换方法,其特征在于,包括:
    源SM网元决定为UE进行SM的切换,并选择目标SM网元;
    所述源SM网元触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  15. 根据权利要求14所述的方法,其特征在于,所述源SM网元触发所述目标SM进行通道的建立过程包括:
    所述源SM网元向所述目标SM网元发送UE ID和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  16. 根据权利要求15所述的方法,其特征在于,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:
    所述源SM网元接收源基站发送的触发SM重定向的消息。
  17. 根据权利要求16所述的方法,其特征在于,所述触发SM重定向的消息包括目标基站的地址或者用于映射到所述目标基站的地址的信息。
  18. 根据权利要求15或16所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元依据所述目标基站的地址或者用于映射到所述目标基站地址的信息,与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道的参数。
  19. 根据权利要求14所述的方法,其特征在于,所述源SM网元触发所述目标SM网元进行通道的建立过程包括:
    所述源SM网元向所述目标SM网元发送UE ID和指示所述目标基站 的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  20. 根据权利要求19所述的方法,其特征在于,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:
    所述移动管理网元向所述源SM网元发送所述UE ID和所述指示所述目标基站的地址的信息。
  21. 根据权利要求19或20所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元依据所述目标基站的地址或者所述用于映射到所述目标基站地址的信息,与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道的参数。
  22. 根据权利要求14所述的方法,其特征在于,所述源SM网元触发所述目标SM网元进行通道的建立过程包括:
    所述源SM网元向移动管理网元发送目标SM网元的地址;
    所述移动管理网元向目标基站发送所述目标SM网元的地址;
    所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址以及用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  23. 根据权利要求22所述的方法,其特征在于,在所述源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:
    所述移动管理网元将指示所述目标基站的地址的信息和UE ID发给所述源SM网元,所述指示所述目标基站的地址的信息包括所述目标基站的 地址或者用于映射到所述目标基站地址的信息。
  24. 根据权利要求22或23所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元向所述目标基站发送用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道并用于上行传输的参数。
  25. 根据权利要求14所述的方法,其特征在于,所述源SM网元触发所述目标SM进行通道的建立过程包括:
    所述源SM网元向所述目标SM网元发送UE ID和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  26. 根据权利要求25所述的方法,其特征在于,在源SM网元决定为UE进行SM的切换,并选择目标SM之前,还包括:
    所述目标基站向所述源SM网元发送所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  27. 根据权利要求25或26所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元向所述目标基站发送用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道并进行上行传输的参数。
  28. 根据权利要求14至27任一项所述的方法,其特征在于,所述通道还包括:
    源目标用户面功能实体与所述目标用户面功能实体之间的数据通道。
  29. 根据权利要求28所述的方法,其特征在于,所述目标SM网元进 行通道的建立过程还包括:
    所述目标SM网元与所述源SM网元交互用于建立所述源目标用户面功能实体和所述目标用户面功能实体之间的数据通道的参数。
  30. 根据权利要求29所述的方法,其特征在于,还包括:
    所述源SM网元向所述目标SM网元发送所述UE的承载上下文相关的参数。
  31. 根据权利要求14至29任一项所述的方法,其特征在于,所述通道还包括:
    所述目标SM网元和所述目标基站之间的控制面信令通道。
  32. 根据权利要求31所述的方法,其特征在于,所述目标SM网元进行通道的建立过程还包括:
    所述目标SM网元与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
  33. 一种切换方法,其特征在于,包括:
    目标基站决定为UE进行SM的切换,并选择目标SM网元;
    所述目标基站触发所述目标SM网元通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  34. 根据权利要求33所述的方法,其特征在于,所述目标基站触发所述目标SM网元进行通道的建立过程包括:
    所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并进行下行传输的参数。
  35. 根据权利要求34所述的方法,其特征在于,所述目标SM网元进行通道的建立过程包括:
    所述目标SM网元向所述目标基站发送用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道并进行上行传输的参数。
  36. 根据权利要求33至35任一项所述的方法,其特征在于,所述通道还包括:
    源目标用户面功能实体与所述目标用户面功能实体之间的数据通道。
  37. 根据权利要求36所述的方法,其特征在于,所述目标SM网元进行通道的建立过程还包括:
    所述目标SM网元与所述源SM网元交互用于建立所述源目标用户面功能实体和所述目标用户面功能实体之间的数据通道的参数。
  38. 根据权利要求37所述的方法,其特征在于,还包括:
    所述源SM网元向所述目标SM网元发送所述UE的承载上下文相关的参数。
  39. 根据权利要求33至38任一项所述的方法,其特征在于,所述通道还包括:
    所述目标SM网元和所述目标基站之间的控制面信令通道。
  40. 根据权利要求39所述的方法,其特征在于,所述目标SM网元进行通道的建立过程还包括:
    所述目标SM网元与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
  41. 一种移动性管理网元,其特征在于,包括:
    处理器,用于决定为用户设备UE进行会话管理SM的切换,并选择目标会话管理SM网元;
    通信组件,用于触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  42. 根据权利要求41所述的移动性管理网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向所述目标SM网元发送用户设备的标识UE ID、源SM网元的地址和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  43. 根据权利要求41所述的移动性管理网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向所述目标基站发送目标SM网元的地址,以使得所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址以及用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  44. 根据权利要求41所述的移动性管理网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向源SM网元发送UE ID、指示所述目标基站的地址的信息和所述目标SM网元的地址,以使得所述源SM网元依据所述目标SM网元的地址,向所述目标SM网元发送所述UE ID、所述指示目标基站的地址的信息和用于建立所述目标用户面功能实体和所述目标 基站之间的用户面数据通道并用于下行传输的参数,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站的地址的信息。
  45. 根据权利要求44所述的移动性管理网元,其特征在于,所述通信组件还用于:
    在所述处理器决定为UE进行SM的切换,并选择目标SM之前,接收所述目标基站发送的所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  46. 一种SM网元,其特征在于,包括:
    处理器,用于决定为UE进行SM的切换,并选择目标SM网元;
    通信组件,用于触发所述目标SM网元进行通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  47. 根据权利要求46所述的SM网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向所述目标SM网元发送UE ID和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  48. 根据权利要求47所述的SM网元,其特征在于,所述通信组件还用于:
    在所述处理器决定为UE进行SM的切换,并选择目标SM之前,接收源基站发送的触发SM重定向的消息。
  49. 根据权利要求48所述的SM网元,其特征在于,所述通信组件用 于,接收源基站发送的触发SM重定向的消息包括:
    所述通信组件具体用于,接收源基站发送的触发SM重定向的消息,所述触发SM重定向的消息包括目标基站的地址或者用于映射到所述目标基站的地址的信息。
  50. 根据权利要求46所述的SM网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向所述目标SM网元发送UE ID和指示所述目标基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  51. 根据权利要求50所述的SM网元,其特征在于,所述通信组件还用于:
    在所述处理器决定为UE进行SM的切换,并选择目标SM之前,接收移动管理网元发送的所述UE ID和所述指示所述目标基站的地址的信息。
  52. 根据权利要求46所述的SM网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向移动管理网元发送目标SM网元的地址,以使得所述移动管理网元向所述目标基站发送所述目标SM网元的地址,以使得所述目标基站向所述目标SM网元发送UE ID、源SM网元的地址以及用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  53. 根据权利要求52所述的SM网元,其特征在于,所述通信组件还 用于:
    在所述处理器决定为UE进行SM的切换,并选择目标SM之前,接收所述移动管理网元发送的指示所述目标基站的地址的信息和UE ID,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
  54. 根据权利要求46所述的SM网元,其特征在于,所述通信组件用于触发所述目标SM网元进行通道的建立过程包括:
    所述通信组件具体用于,向所述目标SM网元发送UE ID和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  55. 根据权利要求54所述的SM网元,其特征在于,所述通信组件还用于:
    在所述处理器决定为UE进行SM的切换,并选择目标SM之前,接收所述目标基站发送的所述用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并用于下行传输的参数。
  56. 根据权利要求46-55任一项所述的SM网元,其特征在于,所述通信组件还用于:
    与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的用户面数据通道的参数。
  57. 根据权利要求46-56任一项所述的SM网元,其特征在于,所述通信组件还用于:
    与所述目标SM网元交互用于建立源目标用户面功能实体和所述目标 用户面功能实体之间的数据通道的参数。
  58. 根据权利要求57所述的SM网元,其特征在于,所述通信组件还用于:
    向所述目标SM网元发送所述UE的承载上下文相关的参数。
  59. 根据权利要求46-58任一项所述的SM网元,其特征在于,所述通信组件还用于:
    与所述目标基站交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
  60. 一种基站,其特征在于,包括:
    处理器,用于决定为UE进行SM的切换,并选择目标SM网元;
    通信组件,用于触发所述目标SM网元通道的建立过程,所述通道包括:目标用户面功能实体和目标基站之间的用户面数据通道。
  61. 根据权利要求60所述的基站,其特征在于,所述通信组件用于触发所述目标SM网元通道的建立过程包括:
    所述通信组件具体用于,向所述目标SM网元发送UE ID、源SM网元的地址和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并进行下行传输的参数。
  62. 根据权利要求60所述的基站,其特征在于,所述通信组件用于触发所述目标SM网元通道的建立过程包括:
    与所述目标SM网元交互用于建立所述目标用户面功能实体和目标基站之间的控制面信令通道的参数。
  63. 根据权利要求60所述的基站,其特征在于,所述通信组件还用 于:
    在向所述目标SM网元发送UE ID、源SM网元的地址和用于建立所述目标用户面功能实体和所述目标基站之间的用户面数据通道并进行下行传输的参数之前,接收移动管理网元发送的所述目标SM网元的地址。
  64. 根据权利要求60所述的基站,其特征在于,所述通信组件还用于:
    向源SM网元发送指示所述基站的地址的信息,所述指示所述目标基站的地址的信息包括所述目标基站的地址或者用于映射到所述目标基站地址的信息。
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