CN108377519B - Method and device for processing session connection - Google Patents

Method and device for processing session connection Download PDF

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Publication number
CN108377519B
CN108377519B CN201611020268.7A CN201611020268A CN108377519B CN 108377519 B CN108377519 B CN 108377519B CN 201611020268 A CN201611020268 A CN 201611020268A CN 108377519 B CN108377519 B CN 108377519B
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pdu session
access network
network node
anchor point
target
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CN108377519A (en
Inventor
康艳超
张娟
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Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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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 session or connection
    • H04W36/0033Control or signalling for completing the hand-off for data session or connection with transfer of context information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

Abstract

The invention provides a method and a device for processing session connection, wherein the method for processing session connection comprises the following steps: acquiring anchor point information of at least one PDU session of which the connection is established currently from a source side access network node, and determining whether a target side access network node can serve the at least one PDU session according to the anchor point information. The scheme of the invention can enable the access network node to distinguish and process different types of PDU sessions in the UE switching process.

Description

Method and device for processing session connection
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing session connection.
Background
In a new generation communication system, different Packet Data Unit (PDU) session sessions have different continuity requirements, some PDU sessions require that continuity is always guaranteed when a user equipment UE moves, some PDU sessions can only guarantee continuity in a certain service area, and continuity cannot be maintained when the UE moves out of the service area.
Three continuity modes SSC mode are currently defined for different continuity requirements of a PDU session, namely SSC mode1, SSC mode2 and SSC mode 3. Wherein, the SSC mode1 refers to allocating a user plane IP anchor (may be referred to as IP anchor for short) for a PDU session, and the IP anchor is kept unchanged throughout the lifetime of the PDU session; SSC mode2 means that the IP anchor point allocated for the PDU conversation can only be kept in a certain service area, and when the UE moves out of the service area of the IP anchor point, a new IP anchor point needs to be selected; SSC mode3 means that before the connection of the UE to an IP anchor point is terminated, a new PDU session to the same data network is established, a new IP anchor point is selected for the new PDU session, and the UE can transfer the data flow to the new PDU session and then delete the previous PDU session connection.
These three SSC modes are support for different continuity of PDU sessions. A PDU session with attribute SSC mode1, which can still be maintained when a handover of the UE occurs. A PDU session with attribute SSC mode2, when UE switches to a new Access Network node (RAN for short), if the new RAN and IP anchor can keep connection, the connection of the PDU session can still be guaranteed after switching, if the new RAN and IP anchor can not keep connection, the PDU session will release connection when switching occurs, and when UE switches to a new cell, the PDU session establishment process is restarted, and a new IP anchor is selected for UE. And the PDU session algorithm with the attribute of SSC mode3 is optimized on the basis of SSC mode2, namely the UE can maintain two PDU session connections to different IP anchor points, the UE establishes a new PDU session connection before deleting the PDU session connection and transfers the data flow from the original PDU session connection to the new PDU session connection.
Therefore, when a handover occurs for a UE, different processing is required for PDU sessions of different SSC modes. For example, for a PDU session of SSC mode2, it may be necessary to determine whether the service range of the IP anchor has been moved out before handover; for the PDU session of SSC mode3, it is also necessary to determine whether the service range of the IP anchor is moved out before handover. However, the SSC mode of a PDU session and the properties of the IP anchor of a connection are not known to the current access network node, and different types of PDU sessions cannot be handled differently.
Disclosure of Invention
The invention aims to provide a method and a device for processing session connection, which aim to solve the problem that the existing access network node cannot distinguish and process different types of PDU sessions in the UE switching process.
In one aspect, an embodiment of the present invention provides a method for processing session connection, including:
acquiring anchor point information of at least one Packet Data Unit (PDU) session of all established connections from a source side access network node;
and determining whether the target side access network node can serve the PDU session or not according to the anchor point information.
Preferably, the step of obtaining anchor point information of at least one PDU session of all currently established connections from the source side access network node includes:
receiving a switching request message sent by the source side access network node;
and acquiring anchor point information of the at least one PDU session which is currently connected according to the switching request message.
Preferably, the step of determining whether the target side access network node can serve the at least one PDU session according to the anchor point information includes:
judging whether the anchor point information of each PDU conversation in the at least one PDU conversation is configured in the target side access network node;
if the anchor point information of the PDU session is configured in the target side access network node, determining that the target side access network node can serve the PDU session; or
And if the anchor point information of the PDU conversation is not configured in the target side access network node, determining that the target side access network node can not serve the PDU conversation.
Preferably, the method further comprises:
and sending a switching response message to the source side access network node, wherein the switching response message comprises the PDU session which can be served by the target side access network node and/or the PDU session which cannot be served.
Preferably, the anchor point information of the PDU session in the source side access network node is provided to the source side access network node by the core network in the setup process of the PDU session, and is stored in the context of the corresponding PDU session.
Preferably, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
On the other hand, an embodiment of the present invention further provides a method for processing session connection, including:
and sending anchor point information of at least one PDU session which is currently connected to a target side access network node, so that the target side access network node determines whether the target side access network node can serve the PDU session according to the anchor point information.
Preferably, the step of sending anchor point information of at least one PDU session of all currently established connections to the target side access network node includes:
and sending a switching request message to the target side access network node, wherein the switching request message comprises anchor point information of all the at least one PDU sessions which are established with connection currently.
Preferably, the method further comprises:
and receiving a handover response message sent by the target side access network node, wherein the handover response message comprises the PDU session which can be served by the target side access network node and/or the PDU session which can not be served.
Preferably, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
In another aspect, an embodiment of the present invention further provides an apparatus for processing session connection, where the apparatus includes:
the acquisition module is used for acquiring anchor point information of at least one PDU session with all established connections from a source side access network node;
and the determining module is used for determining whether the target side access network node can serve the PDU conversation or not according to the anchor point information.
Preferably, the obtaining module includes:
a receiving unit, configured to receive a handover request message sent by the source side access network node;
and the acquisition unit is used for acquiring anchor point information of all the currently established PDU sessions according to the switching request message.
Preferably, the determining module includes:
a determining unit, configured to determine whether anchor point information of each PDU session in the at least one PDU session is already configured in the target side access network node;
a first determining unit, configured to determine that the target-side access network node is capable of serving the PDU session when anchor point information of the PDU session is already configured in the target-side access network node;
a second determining unit, configured to determine that the target-side access node is unable to serve the PDU session when anchor point information of the PDU session is not configured in the target-side access node.
Preferably, the apparatus further comprises:
a first sending module, configured to send a handover response message to the source-side access network node, where the handover response message includes a PDU session that the target-side access network node can serve and/or a PDU session that cannot serve.
Preferably, the anchor point information of the PDU session in the source side access network node is provided to the source side access network node by the core network in the setup process of the PDU session, and is stored in the context of the corresponding PDU session.
Preferably, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
In another aspect, an embodiment of the present invention further provides an apparatus for processing session connection, where the apparatus includes:
a second sending module, configured to send anchor point information of at least one packet data unit PDU session currently having established connection to a target side access node, so that the target side access node determines whether it can serve the at least one PDU session according to the anchor point information.
Preferably, the second sending module is specifically configured to:
and sending a switching request message to the target side access network node, wherein the switching request message comprises anchor point information of all the at least one PDU sessions which are established with connection currently.
Preferably, the apparatus further comprises:
a receiving module, configured to receive a handover response message sent by the target side access network node, where the handover response message includes a PDU session that the target side access network node can serve and/or a PDU session that cannot serve.
Preferably, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
Through the technical scheme, the invention has the beneficial effects that:
the method for processing the session connection of the embodiment of the invention can ensure that the access network node can process different types of PDU sessions in the UE switching process by acquiring the anchor point information of at least one PDU session which is currently connected from the source side access network node and determining whether the target side access network node can serve the at least one PDU session according to the anchor point information.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 shows a flowchart of a method of processing session connection according to a first embodiment of the present invention.
Fig. 2 is a flowchart illustrating a PDU session establishment procedure according to an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating an encoding structure of PDU session identification information in an embodiment of the present invention.
Fig. 4 is a diagram illustrating configuration of anchor point information for a RAN node according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for processing session connection according to an embodiment of the present invention.
Fig. 6A is a connection diagram of a PDU session before handover of a UE according to an embodiment of the present invention.
Fig. 6B is a connection diagram of a PDU session after handover of a UE according to an embodiment of the present invention.
Fig. 7 shows a flowchart of a method of processing session connection according to a second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an apparatus for processing session connection according to a third embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an apparatus for processing session connection according to a fourth embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a target RAN node according to a fifth embodiment of the present invention.
Fig. 11 is a schematic diagram showing a source-side RAN node according to a sixth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
Referring to fig. 1, a first embodiment of the present invention provides a method for handling session connection, which is applied to a target access network RAN node, and includes the following steps 101 to 102, which are described in detail below.
Step 101: and acquiring anchor point information of at least one PDU session of all established connections from the source side access network node.
In the embodiment of the invention, in the process of switching the UE from the source side RAN node to the target side RAN node, the target side RAN node acquires anchor point information of all PDU sessions which are currently connected with the UE and established from the source side RAN node. The number of all PDU sessions may be one or more. The anchor point information of the PDU session specifically refers to information of a user plane anchor point allocated for the PDU session.
Specifically, the manner in which the target RAN node acquires the anchor point information from the source RAN node may be: firstly, receiving a switching request message sent by a source side RAN node, wherein the switching request message comprises anchor point information of at least one PDU session of which the connection is established currently; then, according to the switching request message, anchor point information of at least one PDU session of all established connections is obtained.
In the embodiment of the present invention, the anchor point information of the PDU session may be identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information, and the like, which is not limited in the present invention.
The anchor point information of the PDU session in the source side RAN node is provided to the source side RAN node by the core network during the setup of the PDU session, and is stored in the context of the corresponding PDU session.
Referring to fig. 2, a flowchart of a PDU session establishment procedure according to an embodiment of the present invention is shown, where the PDU session establishment procedure includes the following steps:
step 21: under the trigger of terminal application, UE sends PDU conversation to establish request message to core network control function main body, the request message at least includes information such as access point APN, service type;
step 22: the core network control function body selects a proper user plane anchor point for the UE to establish PDU session connection according to the PDU session establishment request message, the subscription of the UE, the local configuration and the like;
step 23: the core network control function body initiates a signaling process to establish a PDU session from the UE to the RAN node to the anchor point;
step 24: a core network control function body sends a PDU session establishment response message to UE, wherein the PDU session establishment response message comprises PDU session identification information, QoS (quality of service) information, address information, anchor point identification information and the like; wherein, under the condition that the PDU conversation identification information includes the anchor point identification information, the anchor point identification information is hidden in the PDU conversation identification information, and the transmission is not displayed.
For example, refer to fig. 3, which is a schematic diagram illustrating an encoding structure of PDU session identification information in an embodiment of the present invention. The PDU session identification information is usually distributed by a core network mobility management MM or session management SM functional body, and at least includes control function node identification information, user plane anchor point identification information, and internal identification information. The UE can directly acquire the identification information of the anchor point of the user plane from the PDU conversation identification information according to the prior agreement.
Step 102: and determining whether the target side access network node can serve the PDU session or not according to the anchor point information.
In the embodiment of the present invention, the specific implementation manner of step 102 may be:
firstly, judging whether anchor point information of each PDU session in at least one PDU session is configured in a target side RAN node; then, if it is determined that anchor point information of a PDU session is already configured in the target RAN node, it is determined that the target RAN node can serve the PDU session, or, if it is determined that anchor point information of a PDU session is not configured in the target RAN node, it is determined that the target RAN node cannot serve the PDU session.
That is, the local area of the target RAN node is usually configured with a plurality of anchor point information in advance according to actual conditions. In the UE switching process, after a target side RAN node acquires anchor point information of all current PDU sessions established with connection from a source side RAN node, whether the anchor point information of each PDU session is the same as certain anchor point information in local configuration or not is judged, the corresponding PDU session can be served only under the condition that one anchor point information in the local configuration is the same, the switching process is completed, otherwise, the corresponding PDU session cannot be served, and a response message is sent to the source side RAN node to indicate that the PDU session cannot be switched.
For the way anchor point information is configured in the RAN node, see fig. 4. In fig. 4, the RAN node may be connected to three user plane anchors, i.e., UP GW1, UP GW2, and UP GW3, at which point the operator may configure the following anchor information locally at the RAN node:
identification information of UP GW1, identification information of UP GW2, and identification information of UP GW 3; or
Service area identification information of UP GW1, service area identification information of UP GW2, and service area identification information of UP GW 3.
In this embodiment of the present invention, after step 102, the method for processing session connection further includes:
and sending a switching response message to the source RAN node, wherein the switching response message comprises the PDU session which can be served by the target RAN node and/or the PDU session which cannot be served.
Next, a method for processing session connection according to an embodiment of the present invention is described with reference to fig. 5. In fig. 5, the method comprises the following steps:
step 51: the source side RAN node determines to switch the UE to a target side RAN node according to the measurement report information of the UE and other information (including a switching threshold value configured by the source side RAN node and the like);
step 52: a source side RAN node sends a switching request message to a target side RAN node, wherein the switching request message comprises context information of all PDU sessions which are established and connected by current UE, and the context information comprises anchor point identification information of all PDU sessions;
step 53: the target side RAN node determines whether the PDU session can be admitted or served according to anchor point identification information, service quality information and the like of each PDU session; that is, if the anchor point identification information of a PDU session is the same as one of the anchor point identification information configured locally by the target RAN node, it is determined that the PDU session can be served; if the PDU conversation anchor point identification information is different from any anchor point identification information configured locally, determining that the PDU conversation can be served;
step 54: a target side RAN node sends a switching response message to a source side RAN node, wherein the switching response message comprises PDU sessions which can be served by the target side RAN node and/or PDU sessions which cannot be served;
step 55: the target side RAN node, the source side RAN node and the core network node execute a signaling process to switch the PDU session capable of being served, release the PDU session incapable of being served and reestablish the PDU session incapable of being served if necessary.
Referring to fig. 6A and 6B, connection diagrams of PDU sessions before and after UE handover according to an embodiment of the present invention are shown. In this particular embodiment, the anchor points connectable to the source side RAN node are UP GW1, UP GW2 and UP GW3, and the anchor points connectable to the target side RAN node are UP GW1 and UP GW2, i.e. information about UP GW1 and UP GW2 may be configured in the target side RAN node. Before handover, as shown in fig. 6A, the established PDU session includes PDU session 1 and PDU session 2, the anchor point allocated for PDU session 1 is UP GW1, and the anchor point allocated for PDU session 2 is UP GW 3. Since no information about the UPGW3 is configured in the RAN node on the target side, after handover, as shown in fig. 6B, the connection of PDU session 1 is retained and PDU session 2 is released.
The method for processing session connection according to the first embodiment of the present invention obtains anchor point information of at least one PDU session currently connected from a source RAN node, and determines whether a target RAN node can serve the at least one PDU session according to the anchor point information, so that the RAN node can process different types of PDU sessions in a UE handover process.
Second embodiment
Referring to fig. 7, a second embodiment of the present invention provides a method for handling session connection, which is applied to a source-side RAN node, and includes the following steps 701, which are described in detail below.
Step 701: and sending anchor point information of at least one PDU session which is currently connected to a target side access network node, so that the target side access network node determines whether the target side access network node can serve the PDU session according to the anchor point information.
In this embodiment of the present invention, the manner in which the source side RAN node sends the anchor point information to the target side RAN node may be: and sending a switching request message to the target side RAN node, wherein the switching request message comprises anchor point information of at least one PDU session of which the connection is established currently.
The anchor point information of the PDU session may be identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information, and the like, which is not limited in the present invention.
In an embodiment of the present invention, the method for processing session connection further includes:
and receiving a handover response message sent by the target side RAN node, wherein the handover response message comprises the PDU session which can be served and/or the PDU session which cannot be served by the target side RAN node.
In the method for processing session connection according to the second embodiment of the present invention, by sending anchor point information of at least one PDU session currently having established connection to the target RAN node, the target RAN node determines whether it can serve the at least one PDU session according to the anchor point information, and thus, the RAN node can be ensured to process different types of PDU sessions in a UE handover process.
Third embodiment
Referring to fig. 8, a third embodiment of the present invention provides an apparatus for processing session connection, where the apparatus is applied to a target RAN node, and includes:
an obtaining module 81, configured to obtain anchor point information of at least one PDU session currently connected to a source side access network node;
a determining module 82, configured to determine whether the target side access node can serve the at least one PDU session according to the anchor point information.
Specifically, the obtaining module 81 includes:
a receiving unit, configured to receive a handover request message sent by the source side access network node;
and the acquisition unit is used for acquiring anchor point information of all the currently established PDU sessions according to the switching request message.
Specifically, the determining module 82 includes:
a determining unit, configured to determine whether anchor point information of each PDU session in the at least one PDU session is already configured in the target side access network node;
a first determining unit, configured to determine that the target-side access network node is capable of serving the PDU session when anchor point information of the PDU session is already configured in the target-side access network node;
a second determining unit, configured to determine that the target-side access node is unable to serve the PDU session when anchor point information of the PDU session is not configured in the target-side access node.
In this embodiment of the present invention, the apparatus for processing session connection further includes:
a first sending module, configured to send a handover response message to the source-side access network node, where the handover response message includes a PDU session that the target-side access network node can serve and/or a PDU session that cannot serve.
Wherein the anchor point information of the PDU session in the source side access network node is provided to the source side access network node by the core network in the setup process of the PDU session, and is stored in the context of the corresponding PDU session.
The anchor point information of the PDU session may be identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information, and the like, which is not limited in the present invention.
The apparatus for processing session connection according to the third embodiment of the present invention obtains anchor point information of at least one PDU session currently connected from a source RAN node, and determines whether a target RAN node can serve the at least one PDU session according to the anchor point information, so that the RAN node can process different types of PDU sessions in a UE handover process.
Fourth embodiment
Referring to fig. 9, a fourth embodiment of the present invention provides an apparatus for processing session connection, where the apparatus is applied to a source-side RAN node, and the apparatus includes:
a second sending module 91, configured to send anchor point information of at least one packet data unit PDU session currently having established connection to a target side access node, so that the target side access node determines whether it can serve the at least one PDU session according to the anchor point information.
In this embodiment of the present invention, the second sending module 91 is specifically configured to:
and sending a switching request message to the target side access network node, wherein the switching request message comprises anchor point information of all the at least one PDU sessions which are established with connection currently.
Specifically, the apparatus for processing session connection further includes:
a receiving module, configured to receive a handover response message sent by the target side access network node, where the handover response message includes a PDU session that the target side access network node can serve and/or a PDU session that cannot serve.
And the anchor point information of the PDU session may be identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information, etc.
The apparatus for processing session connection according to the fourth embodiment of the present invention sends anchor point information of at least one PDU session currently having established connection to the target RAN node, so that the target RAN node determines whether it can serve the at least one PDU session according to the anchor point information, and can ensure that the RAN node processes different types of PDU sessions in a UE handover process in a differentiated manner.
Fifth embodiment
Referring to fig. 10, a fifth embodiment of the present invention provides a target-side RAN node including a first bus 111, a first transceiver 112, an antenna 113, a first bus interface 114, a first processor 115, and a first memory 116.
The first processor 115 is configured to read a program in the first memory 116, and execute the following processes:
controlling the first transceiver 112 to obtain anchor point information of at least one packet data unit, PDU, session of all currently established connections from the source side access network node, and determining whether the target side access network node can serve the at least one PDU session according to the anchor point information.
A first transceiver 112 for receiving and transmitting data under the control of a first processor 115.
Specifically, the first processor 115 is further configured to: and controlling the first transceiver 112 to receive a handover request message sent by the source-side access network node, and obtaining anchor point information of all currently-established-connection PDU sessions according to the handover request message.
Specifically, the first processor 115 is further configured to: determining whether anchor point information of each PDU session in the at least one PDU session is configured in the target side access network node, if the anchor point information of the PDU session is configured in the target side access network node, determining that the target side access network node can serve the PDU session, or if the anchor point information of the PDU session is not configured in the target side access network node, determining that the target side access network node cannot serve the PDU session.
Specifically, the first processor 115 is further configured to: and sending a switching response message to the source side access network node, wherein the switching response message comprises the PDU session which can be served by the target side access network node and/or the PDU session which cannot be served.
Specifically, the anchor point information of the PDU session in the source side access network node is provided to the source side access network node by the core network in the process of establishing the PDU session, and is stored in the context of the corresponding PDU session.
Specifically, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
In fig. 10, a bus architecture (represented by a first bus 111), the first bus 111 may include any number of interconnected buses and bridges, the first bus 111 linking together various circuits including one or more processors represented by a first processor 115 and a memory represented by a first memory 116. The first bus 111 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The first bus interface 114 provides an interface between the first bus 111 and the first transceiver 112. The first transceiver 112 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the first processor 115 is transmitted over a wireless medium through the antenna 113, and further, the antenna 113 receives the data and transmits the data to the first processor 115.
The first processor 115 is responsible for managing the first bus 111 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the first memory 116 may be used to store data used by the first processor 115 in performing operations.
Alternatively, the first processor 114 may be a CPU, ASIC, FPGA or CPLD.
Sixth embodiment
Referring to fig. 11, a sixth embodiment of the present invention provides a source-side RAN node that includes a second bus 121, a second transceiver 122, an antenna 123, a second bus interface 124, a second processor 125, and a second memory 126.
The second processor 125 is configured to read the program in the second memory 126, and execute the following processes:
and controlling the second transceiver 122 to send anchor point information of at least one PDU session of all currently established connections to the target-side access network node, so that the target-side access network node determines whether the target-side access network node can serve the at least one PDU session according to the anchor point information.
A second transceiver 122 for receiving and transmitting data under the control of a second processor 125.
Specifically, the second processor 125 is further configured to: and controlling the second transceiver 122 to send a handover request message to the target-side access network node, where the handover request message includes anchor point information of all currently connected PDU sessions.
Specifically, the second processor 125 is further configured to: and controlling the second transceiver 122 to receive a handover response message sent by the target-side access network node, where the handover response message includes a PDU session that the target-side access network node can service and/or a PDU session that the target-side access network node cannot service.
Specifically, the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
In fig. 11, a bus architecture (represented by the second bus 121), the second bus 121 may include any number of interconnected buses and bridges, and the second bus 121 links together various circuits including one or more processors, represented by the second processor 125, and a memory, represented by the second memory 126. The second bus 121 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A second bus interface 124 provides an interface between the second bus 121 and the second transceiver 122. The second transceiver 122 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the second processor 125 is transmitted over a wireless medium via the antenna 123, and further, the antenna 123 receives the data and transmits the data to the second processor 125.
The second processor 125 is responsible for managing the second bus 121 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. While the second memory 126 may be used to store data used by the second processor 125 in performing operations.
Alternatively, the second processor 124 may be a CPU, ASIC, FPGA or CPLD.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (18)

1. A method for processing session connections, comprising:
acquiring anchor point information of at least one Packet Data Unit (PDU) session of all established connections from a source side access network node;
determining whether the target side access network node can serve the at least one PDU session according to the anchor point information;
the step of determining whether the target side access network node can serve the at least one PDU session according to the anchor point information includes:
judging whether the anchor point information of each PDU conversation in the at least one PDU conversation is configured in the target side access network node;
if the anchor point information of the PDU session is configured in the target side access network node, determining that the target side access network node can serve the PDU session; or
And if the anchor point information of the PDU conversation is not configured in the target side access network node, determining that the target side access network node can not serve the PDU conversation.
2. The method of claim 1, wherein the step of obtaining anchor point information for at least one PDU session for all currently established connections from a source side access network node comprises:
receiving a switching request message sent by the source side access network node;
and acquiring anchor point information of the at least one PDU session which is currently connected according to the switching request message.
3. The method of claim 1, further comprising:
and sending a switching response message to the source side access network node, wherein the switching response message comprises the PDU session which can be served by the target side access network node and/or the PDU session which cannot be served.
4. The method according to claim 1, wherein anchor information for the PDU session in the source side access network node is provided by a core network to the source side access network node during establishment of the PDU session, stored in context of the respective PDU session.
5. The method according to any of claims 1 to 4, wherein the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
6. A method for processing session connections, comprising:
sending anchor point information of at least one PDU session which is currently connected to a target side access network node, so that the target side access network node determines whether the target side access network node can serve the PDU session according to the anchor point information;
the anchor point information of the at least one PDU session is used for the target side access network node to judge whether the anchor point information of each PDU session in the at least one PDU session is configured in the target side access network node; determining that the target-side access network node is capable of serving the PDU session when anchor information for the PDU session has been configured in the target-side access network node; or, when the anchor point information of the PDU session is not configured in the target-side access network node, determining that the target-side access network node cannot serve the PDU session.
7. The method of claim 6, wherein the step of sending anchor point information for at least one PDU session of all currently established connections to the target-side access network node comprises:
and sending a switching request message to the target side access network node, wherein the switching request message comprises anchor point information of all the at least one PDU sessions which are established with connection currently.
8. The method of claim 6, further comprising:
and receiving a handover response message sent by the target side access network node, wherein the handover response message comprises the PDU session which can be served by the target side access network node and/or the PDU session which can not be served.
9. The method according to any of claims 6 to 8, wherein the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in the PDU session identification information.
10. An apparatus for processing session connections, comprising:
the acquisition module is used for acquiring anchor point information of at least one PDU session with all established connections from a source side access network node;
a determining module, configured to determine whether a target side access network node can serve the at least one PDU session according to the anchor point information;
the determining module comprises:
a determining unit, configured to determine whether anchor point information of each PDU session in the at least one PDU session is already configured in the target side access network node;
a first determining unit, configured to determine that the target-side access network node is capable of serving the PDU session when anchor point information of the PDU session is already configured in the target-side access network node;
a second determining unit, configured to determine that the target-side access node is unable to serve the PDU session when anchor point information of the PDU session is not configured in the target-side access node.
11. The apparatus of claim 10, wherein the obtaining module comprises:
a receiving unit, configured to receive a handover request message sent by the source side access network node;
and the acquisition unit is used for acquiring anchor point information of all the currently established PDU sessions according to the switching request message.
12. The apparatus of claim 10, further comprising:
a first sending module, configured to send a handover response message to the source-side access network node, where the handover response message includes a PDU session that the target-side access network node can serve and/or a PDU session that cannot serve.
13. The apparatus of claim 10, wherein anchor information for the PDU session in the source side access network node is provided to the source side access network node by a core network during establishment of the PDU session, stored in context of the respective PDU session.
14. The apparatus of any one of claims 10 to 13, wherein the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in PDU session identification information.
15. A system for processing session connections, the system comprising: a source side access network node and a target side access network node;
wherein the source side access network node comprises:
a second sending module, configured to send anchor point information of at least one PDU session with at least one established connection to the target side access network node;
the target side access network node comprises:
the acquisition module is used for acquiring anchor point information of at least one PDU session with all established connections from a source side access network node;
a determination module, wherein the determination module comprises: a determining unit, configured to determine whether anchor point information of each PDU session in the at least one PDU session is already configured in the target side access network node; a first determining unit, configured to determine that the target-side access network node is capable of serving the PDU session when anchor point information of the PDU session is already configured in the target-side access network node; a second determining unit, configured to determine that the target-side access network node is unable to serve the PDU session when anchor point information of the PDU session is not configured in the target-side access network node.
16. The system of claim 15, wherein the second sending module is specifically configured to:
and sending a switching request message to the target side access network node, wherein the switching request message comprises anchor point information of all the at least one PDU sessions which are established with connection currently.
17. The system of claim 15, wherein the source side access network node further comprises:
a receiving module, configured to receive a handover response message sent by the target side access network node, where the handover response message includes a PDU session that the target side access network node can serve and/or a PDU session that cannot serve.
18. The system according to any of claims 15 to 17, wherein the anchor point information of the PDU session is identification information of an anchor point, service area identification information of an anchor point, or identification information of an anchor point included in PDU session identification information.
CN201611020268.7A 2016-11-17 2016-11-17 Method and device for processing session connection Active CN108377519B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103888215A (en) * 2012-12-21 2014-06-25 华为技术有限公司 Data transmission method, apparatus and communication system
WO2016007420A1 (en) * 2014-07-07 2016-01-14 Apple Inc. Procedures for 3gpp circuit switched fallback

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103888215A (en) * 2012-12-21 2014-06-25 华为技术有限公司 Data transmission method, apparatus and communication system
WO2016007420A1 (en) * 2014-07-07 2016-01-14 Apple Inc. Procedures for 3gpp circuit switched fallback

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