CN102256326B - A kind of method and apparatus realizing Route Selection - Google Patents
A kind of method and apparatus realizing Route Selection Download PDFInfo
- Publication number
- CN102256326B CN102256326B CN201010179764.3A CN201010179764A CN102256326B CN 102256326 B CN102256326 B CN 102256326B CN 201010179764 A CN201010179764 A CN 201010179764A CN 102256326 B CN102256326 B CN 102256326B
- Authority
- CN
- China
- Prior art keywords
- direct tunnel
- lgw
- information
- base station
- sgw
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000012986 modification Methods 0.000 claims description 35
- 230000004048 modification Effects 0.000 claims description 35
- 230000008569 process Effects 0.000 claims description 31
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000013507 mapping Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000007726 management method Methods 0.000 description 78
- 230000004044 response Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 10
- 238000012546 transfer Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and apparatus realizing Route Selection, the wireless side network element that all can access for subscriber equipment, obtain this wireless side net element information relevant to direct tunnel and local gateway information; According to acquired wireless side net element information and local gateway information, it is determined whether direct tunnel can be used between described wireless side network element and local gateway. The present invention realizes the method and apparatus of Route Selection, can judge whether flexibly to need to set up direct tunnel for subscriber equipment according to contents such as the system informations in practical application scene, therefore, it is possible to significantly improve data transmission flexibility, and the high efficiency that data are transmitted can also be ensured as far as possible.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for implementing routing.
Background
In order to maintain the competitiveness of the third generation mobile communication system in the communication field, provide faster, lower delay, more personalized mobile communication services to users, and reduce the operation cost of operators, the 3GPP (3rd generation partnership project) standard working group is working on the research of the Evolved Packet System (EPS). Fig. 1 shows a schematic structural diagram of an evolved packet domain system, and as shown in fig. 1, the whole EPS system is divided into two parts, namely a radio access network and a core network. The core network includes a Home Subscriber Server (HSS), a Mobility Management Entity (MME), a Serving GPRS Support Node (SGSN), a Policy and Charging Rule Function (PCRF), a Serving Gateway (SGW), a packet data gateway (pdgateway, PGW), a packet data network (packet data network), and the like. The functions of the parts are detailed as follows:
the home subscriber server is a permanent storage place of the user subscription data and is positioned in a home network subscribed by the user.
The mobility management entity is a storage place of the user subscription data in the current network and is responsible for non-access stratum signaling management from the terminal to the network, the security verification function of the terminal, the mobility management of the terminal, the tracking and paging management function in the idle mode of the user and the bearing management.
The SGSN is a service support point for accessing GERAN and UTRAN users to a core network, has the similar function as a mobile management entity and is responsible for the position updating, paging management, bearing management and the like of the users.
The service gateway is a gateway from a core network to a wireless system, is responsible for user plane bearing from a terminal to the core network and data caching in a terminal idle mode, and can realize the function of initiating a service request at a network side and the functions of legal monitoring and packet data routing and forwarding; the service gateway is responsible for counting the condition that the user terminal uses the wireless network, generating a bill of the terminal using the wireless network and transmitting the bill to the charging gateway.
The packet data gateway, which is a gateway between an evolved system and an external packet data network, is connected to the internet and the packet data network, and is responsible for Internet Protocol (IP) address allocation, a charging function, packet filtering, policy control, and the like of a terminal.
The packet data network is an IP service network of an operator, and provides IP services for users through a core network of the operator.
The policy charging rule function entity is a server in the evolution system responsible for providing rules in charging control, online credit control, threshold control and quality of service (QoS) policies.
A wireless access network is composed of an evolution base station (E-UTRANNodeB, eNB) and a 3G wireless network controller (radio network controller, RNC), and is mainly responsible for receiving and transmitting wireless signals, and managing wireless resources, resource scheduling, access control and the like of an air interface through the contact of the air interface and a terminal.
The SGSN is upgraded to support an S4 interface with a serving gateway, and is interworked with a mobility management unit using a GTPv2 protocol. For SGSNs supporting 3G core networks, the PS domain network architecture differs from that of fig. 1. And the SGSN and the MME are connected by adopting a Gn interface and are communicated by adopting a GTPvl protocol. The SGSN is not connected to the serving gateway but to a Gateway GPRS Support Node (GGSN) via a Gn interface for direct packet data network access.
The home base station comprises a common home base station (HomeNodeB, HNB) and an evolved home base station (homeenodeb, HeNB), is a small-sized and low-power base station, is deployed in private places such as homes, groups, companies or schools as an exclusive resource of some users, is mainly used for providing higher service rate for the users and reducing the cost required for using high-rate services, and simultaneously makes up for the insufficient coverage of the existing distributed cellular wireless communication system. The home base station has the advantages of being economical, convenient, low in power output, plug and play, broadband access, single-mode terminal and the like.
The femtocell may be applied in a 3G or LTE (long term evolution) mobile communication network. In order to facilitate the management of the home base station, a new network element is introduced in the network: and a home base station gateway. The main functions realized by the home base station gateway are as follows: the safety of the home base station is verified, the operation of the home base station is maintained and managed, the home base station is configured and controlled according to the requirements of an operator, and the home base station is responsible for exchanging data information of a core network and the home base station. Fig. 2 is a 3G home base station network architecture diagram, the 3G home base station being connected to a home base station gateway via a newly defined Iuh interface, the home base station gateway providing IuPS and IuCs interfaces to the core network packet domain and circuit domain. For 3G networks, the home base station gateway must shield the influence on the terminal and the network side after the home base station is introduced. For the LTE network, the home base station gateway is optional, so there are two connection modes between the LTE home base station and the core network, one is that the home base station is directly connected to a network element of the core network, and the other is that the home base station is connected to a network element of the core network through the gateway, as shown in fig. 3 and 4 respectively. For the scenario of introducing the hnb gateway shown in fig. 4, the hnb gateway may not integrate the user plane function, and a user plane is directly established between the hnb and the core network user plane gateway, so that the user plane can be flattened and the data transmission delay is reduced, as shown in fig. 5.
The home base station may support local IP access in addition to access through the mobile core network. Under the condition that the home base station has local IP access capability and the user signs to allow local IP access, the home base station can realize the local access of the user to other IP equipment of the home network or the internet. The Internet data service can be distributed through the local access function to reduce the core network load, and the access to the home network equipment can not pass through the core network, so that the data transmission is convenient and efficient. The local IP access function can also be used in a macro cell, the main purpose is similar to that of a home base station, and the local IP access function is more applied to the scene of local IP access Internet, so that the load of a core network is reduced. Fig. 6 shows an architecture for implementing the local access functionality described above. The local access gateway provides functions such as address allocation, charging, packet filtering, policy control, and the like as a network locally accessing to an external network (e.g., the internet). The network element as a logic unit can be used as an independent network element when actually deployed, and can also be deployed jointly with an existing home base station or a home base station gateway. And, if the network element exists as an independent network element, the network element may be located in the wireless side network or in the core network.
In order to keep the local connection continuous during the movement of the user location, an extension tunnel (ExtensionTunnel) may also be introduced. When the UE initially establishes a connection, data is transferred between a wireless side network element and a Local Gateway (LGW) by using a direct tunnel, so that the high efficiency of data transfer is ensured. Once the location of the UE moves, the LGW and the radio network element to which the UE is to access cannot use the direct tunnel to transfer data, but continue to transfer data through the extended tunnel, thereby ensuring service continuity. Obviously, the UE uses the extended tunnel after moving the location, which is not flexible and is not good for the efficiency of data transfer.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for implementing routing, so as to improve flexibility of data transmission and ensure high efficiency of data transmission as much as possible.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of implementing routing, the method comprising:
acquiring wireless side network element information and LGW information related to a direct tunnel aiming at a wireless side network element to be accessed by UE; determining whether a direct tunnel can be used between the wireless side network element and the LGW according to the acquired wireless side network element information and the LGW information.
The operation of determining whether a direct tunnel can be used is performed in the course of at least one of:
a UE switching process;
the tracking area of the UE is updated by the area or the service request process.
In the UE switching process, determining whether a direct tunnel can be used by the LGW;
the specific determination process comprises the following steps: and the LGW judges whether a direct tunnel can be established with the target base station or not according to the information of the target cell or the base station.
The process of acquiring the wireless side network element information comprises the following steps:
when the SGW is not changed, the target mobile management unit sends a bearer modification request to the LGW through the SGW and a packet data gateway (PGW), and sends information of a target cell or a base station to the LGW; or,
when the SGW changes, the target mobility management unit sends a bearer creation request to the target SGW, and the target SGW sends a bearer modification request to the LGW through the PGW and sends information of a target cell or a base station to the LGW.
The determining whether the direct tunnel is usable may result in the direct tunnel being usable, the method further comprising:
and informing the judgment result to a mobile management unit, and establishing the direct tunnel by the mobile management unit.
In the process of updating a tracking area/routing area or requesting a service of the UE, determining whether a direct tunnel can be used by the LGW;
the specific determination process comprises the following steps: the LGW judges whether a direct tunnel can be established with the base station according to the information of the cell or the base station.
The process of acquiring the wireless side network element information comprises the following steps:
when the SGW is not changed, the mobile management unit sends a bearer modification request to the LGW through the SGW and the PGW so as to send information of a cell or a base station to the LGW; or,
when the SGW changes, the target mobility management unit sends a bearer creation request to the target SGW, and the target SGW sends a bearer modification request to the LGW through the PGW and sends information of a target cell or a base station to the LGW.
The determining whether the direct tunnel is usable may result in the direct tunnel being usable, the method further comprising:
and informing the judgment result to a mobile management unit, and establishing the direct tunnel by the mobile management unit.
And when determining whether the direct tunnel can be used, considering a relation comparison table of the LGW and the wireless side network element which can establish the direct tunnel.
A device for realizing routing selection comprises a direct tunnel decision information maintenance unit and a direct tunnel decision unit; wherein,
the direct tunnel decision information maintenance unit is used for acquiring the wireless side network element information and the LGW information related to the direct tunnel aiming at the wireless side network element to be accessed by the UE;
the direct tunnel decision unit is configured to determine whether a direct tunnel may be used between the wireless side network element and the LGW according to the acquired wireless side network element information and LGW information.
The direct tunnel decision unit determines whether the operation of the direct tunnel can be used in the process of at least one of the following procedures:
a UE switching process;
tracking area update or routing area or service request procedure of the UE.
In a UE handover process, the direct tunnel decision unit is disposed in the LGW and configured to:
and judging whether the LGW can establish a direct tunnel with the target base station or not according to the information of the target cell or the base station.
The direct tunnel decision information maintenance unit is arranged in the target mobile management unit and is used for:
when the SGW is unchanged, sending a bearer modification request to the SGW and the PGW, and sending information of a target cell or a base station contained in the bearer modification request to the direct tunnel decision unit; or,
when the SGW changes, the serving gateway SGW and the packet data gateway PGW send a bearer modification request to the LGW by sending a bearer creation request to the target serving gateway SGW, and send information of the target cell or the base station to the direct tunnel decision unit.
Determining whether the direct tunnel can be used as a result of the determination of whether the direct tunnel can be used, the apparatus further comprising a direct tunnel performing unit;
the direct tunnel decision unit is further configured to send the determination result to the direct tunnel execution unit;
the direct tunnel execution unit is used for establishing the direct tunnel.
The direct tunnel execution unit is disposed in the mobility management unit.
In a tracking area update or routing area update or service request process of the UE, the direct tunnel decision unit is disposed in the LGW, and configured to:
and judging whether a direct tunnel can be established with the base station according to the information of the cell or the base station.
The direct tunnel decision information maintenance unit is arranged in the target mobile management unit and is used for:
when the SGW is unchanged, sending a bearer modification request to the SGW and the PGW, and sending information of a cell or a base station contained in the bearer modification request to the direct tunnel decision unit;
when the SGW changes, the serving gateway SGW and the packet data gateway PGW send a bearer modification request to the LGW by sending a bearer creation request to the target serving gateway SGW, and send information of the target cell or the base station to the direct tunnel decision unit.
Determining whether the direct tunnel can be used as a result of the determination of whether the direct tunnel can be used, the apparatus further comprising a direct tunnel performing unit;
the direct tunnel decision unit is further configured to send the determination result to the direct tunnel execution unit;
the direct tunnel execution unit is used for establishing the direct tunnel.
The direct tunnel execution unit is disposed in the mobility management unit.
The direct tunnel decision unit is used for considering gateway information including an LGW and a wireless side network element relation comparison table, which can establish the direct tunnel, when determining whether the direct tunnel can be used.
The method and the device for realizing the routing selection can flexibly judge whether the direct tunnel needs to be established for the user equipment or not according to the contents of the system information and the like in the practical application scene, thereby obviously improving the flexibility of data transmission and ensuring the high efficiency of data transmission as much as possible.
Drawings
FIG. 1 is a schematic diagram of an evolved packet domain system;
fig. 2 is a schematic diagram of a 3G femtocell network architecture;
fig. 3 is one of schematic diagrams of an LTE home base station network architecture;
fig. 4 is a second schematic diagram of an LTE hnb network architecture;
fig. 5 is a third schematic diagram of an LTE hnb network architecture;
FIG. 6 is a diagram of a network architecture for implementing local access;
fig. 7 is a flowchart illustrating a routing performed by a local gateway in a handover process according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating routing performed in an X2 handover process in an LTE access system according to an embodiment of the present invention;
fig. 9 is a flowchart of routing performed by a local gateway in a tracking area update or service request process according to an embodiment of the present invention;
FIG. 10 is a simplified flow chart for implementing routing according to an embodiment of the present invention;
fig. 11 is a diagram of an apparatus for implementing routing according to an embodiment of the present invention.
Detailed Description
In practical application, if LTE access is adopted, the base station refers to a common base station or a home base station, and the mobile management unit refers to an MME. Further, if it is a home base station and in the architecture including the home base station gateway, the message transferred between the base station and the mobile management unit also needs to pass through the home base station gateway, but the home base station gateway does not modify the parameters related to the present invention, and therefore the architecture is not specifically described here. In addition, if the access is UTRAN/GERAN access, the base station refers to RNC or HNBGW, and the mobile management unit refers to SGSN.
Referring to fig. 7, fig. 7 is a flowchart illustrating routing performed by the LGW during a handover procedure according to an embodiment of the present invention. The flow shown in FIG. 7 is applicable to handover within an LTE access system, handover within a UTRAN/GERAN system, or handover between LTE and UTRAN/GERAN systems.
The mobility management unit may not change if it is handed over within the same system, such as within an LTE system, or within a UTRAN/GERAN system. If the mobility management element is unchanged, the source mobility management element and the target mobility management element may be treated as the same network element, and all messages passed between the two may be omitted. The UE has established a local connection prior to the handover. An extended tunnel has been established between the PGW and the LGW, and a direct tunnel has been established between the LGW and the source base station.
The flow shown in fig. 7 includes the following steps:
step 700: the source base station initiates a switching process and requires the UE to report a measurement report.
Step 701: after selecting the target base station, the source base station sends a switching request message to the source mobile management unit, wherein the switching request message comprises information such as target base station identification/target cell identification, target tracking area/routing area identification, and bearing identification of UE.
Step 702: the source mobile management unit sends a forwarding relocation request message to the target mobile management unit, wherein the forwarding relocation request message carries the context information of the UE. Since the UE has already established the local connection, the context information also needs to include information such as an address and a tunnel end identifier of the SGW, an address and a tunnel end identifier of the LGW, and the like.
Step 703: the target mobility management unit determines whether or not the SGW needs to be reselected, and determines that it is unnecessary in the present embodiment. And the target mobile management unit sends a switching request to the target base station, wherein the switching request carries the address of the SGW and the tunnel end identification and/or the address of the LGW and the tunnel end identification to the target base station.
The remaining flow of handover preparation is then performed. The process omitted between step 703 and step 704 is prior art, is well known to those skilled in the art, and is not relevant to the present invention, and will not be described herein.
Step 704: and the UE is switched to a target network and sends a switching completion request to a target base station.
Step 705: and the target base station sends a switching notification request to the target mobile management unit, wherein the switching notification request carries a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier, an address of the target base station and a user plane tunnel end identifier of the UE currently accessed.
Step 706: the target mobile management unit sends a bearer modification request to the SGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the target base station, and an indication notifying the SGW to send the address to the LGW, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier currently accessed by the UE.
Step 707: the SGW sends a bearer modification request to the PGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the target base station, and an indication that informs the PGW to send the address to the LGW, and may further include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 708: the PGW sends a bearer modification request to the LGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the target base station, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier to which the UE is currently accessing.
Step 709: and the LGW judges whether a direct tunnel can be established between the LGW and the target base station or not according to the information.
Step 710: the LGW returns a modify bearer response message to the target mobility management unit through the PGW and the SGW, where the modify bearer response message carries indication information of whether to establish the direct tunnel.
Step 711: and the mobile management unit judges whether to update the information of the target base station according to the indication information in the modified bearing response message. If the LGW indicates that the direct tunnel cannot be established and the target mme does not send the LGW address and the tunnel end id in the handover request in step 703, step 712 does not need to be performed.
Step 712: if the LGW indicates that the direct tunnel cannot be established, and the target mobility management unit issues the address of the LGW and the tunnel end identifier in the handover request in step 703, the target mobility management unit sends a bearer update request to the target base station, where the bearer update request carries indication information that the direct tunnel cannot be established. And after receiving the indication information, the target base station uses the address of the SGW and the tunnel end identification in the subsequent operation.
If the LGW indicates that the direct tunnel can be established, and the target mobility management unit issues the address of the LGW and the tunnel end identifier in the handover request in step 703, the target mobility management unit sends a bearer update request to the target base station, where the bearer update request carries indication information that the direct tunnel can be established. After receiving the indication information, the target base station uses the address of the LGW and the tunnel end identifier in the subsequent operation.
If the LGW indicates that a direct tunnel can be established, and the target mobility management unit does not issue the address of the LGW and the tunnel end identifier in the handover request in step 703, the target mobility management unit sends a bearer update request to the target base station, where the bearer update request carries indication information that the direct tunnel can be established, and the address of the LGW and the tunnel end identifier. After receiving the indication information, the target base station uses the address of the LGW and the tunnel end identifier in the subsequent operation.
The remaining steps for performing the subsequent handover, the omitted process is the prior art, is well known by those skilled in the art, and is not related to the present invention, and will not be described herein.
In this embodiment, the same applies to a flow in which SGW changes. The content delivery involved in the present invention is similar if the SGW changes. Steps 706 to 712 involve transferring the SGW of the target base station to the target SGW. Other handover signaling caused by SGW change may be different from that in this embodiment, but does not relate to the content of the present invention, and is not described herein again.
Referring to fig. 8, fig. 8 is a flowchart of performing routing in an X2 handover process in an LTE access system according to an embodiment of the present invention. The flow shown in fig. 8 is applicable to handover in an LTE access system.
The UE has established a local connection prior to the handover. An extended tunnel has been established between the PGW and the local gateway, and a direct tunnel has been established between the local access gateway and the source base station.
The flow shown in fig. 8 includes the following steps:
step 801: the source base station initiates a switching process, and because the source base station and the target base station directly have an X2 interface, the source base station and the target base station can exchange information with each other through X2 interface messages, and wireless resource reservation is completed. After the procedure is performed, the UE has handed over to the target base station.
Step 802: the target base station sends a path switching request message to the mobile management unit, wherein the path switching request message carries information such as a target base station identifier/a target cell identifier, a target tracking area/routing area identifier, a bearing identifier of the UE and the like.
Step 803: the mobility management unit determines whether the SGW needs to be changed, and determines that the SGW needs to be changed in the present embodiment. The mobility management unit sends a session creation request to the target SGW according to the local connection information of the UE, where the session creation request carries a user plane address and a tunnel end identifier of the target base station, and an indication that informs the SGW to send the address to the LGW, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier to which the UE is currently accessed.
Step 804: the target SGW sends a bearer modification request to the PGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the target base station, and an indication that informs the PGW to send the address to the LGW, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 805: the PGW sends a bearer modification request to the LGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the target base station, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 806: and the LGW judges whether a direct tunnel can be established between the LGW and the target base station or not according to the information.
Step 807: and the LGW returns a modified bearing response message to the target SGW through the PGW, wherein the modified bearing response message carries indication information whether to establish the direct tunnel.
Step 808: and the target SGW returns a session creating response message to the mobile management unit, wherein the session creating response message carries indication information whether to establish the direct tunnel.
Step 809: the mobile management unit judges whether to update the information of the target base station according to the indication information in the session creation response message.
Step 810: and if the LGW indicates that the direct tunnel cannot be established, the mobile management unit sends a path switching response to the target base station, wherein the path switching response carries the address of the SGW and the tunnel end identification.
If the LGW indicates that the direct tunnel can be established, the mobile management unit sends a path switching response to the target base station, wherein the path switching response carries the address of the LGW and the tunnel end identifier, or simultaneously carries the address of the SGW and the tunnel end identifier, the address of the LGW and the tunnel end identifier, and indication information whether the direct tunnel can be established.
Step 811: the mobile management unit sends a session deletion request message to the source SGW, and deletes the UE context information on the source SGW; the source SGW deletes the session according to the request of the mobility management unit.
The remaining steps for performing the subsequent handover, the omitted process is the prior art, is well known by those skilled in the art, and is not related to the present invention, and will not be described herein.
In this embodiment, the same applies to the SGW-invariant flow. If the SGW does not change, the two messages in step 803 and step 804 are a modify bearer request and a modify bearer response, respectively, and the content delivery involved in the present invention is similar. In this case, step 811 need not be performed.
Referring to fig. 9, fig. 9 is a flowchart of routing performed by the local gateway in a tracking area update or service request process according to an embodiment of the present invention. The procedure shown in fig. 9 is applicable to a service request procedure in the EUTRAN/UTRAN/GERAN access system and a tracking area location update procedure in which no change has occurred in the EUTRAN access system, the mobility management unit, and the SGW.
The UE has established a local connection before initiating a tracking area location update procedure or service request. An extended tunnel has been established between the PGW and the home gateway.
The flow shown in fig. 9 includes the following steps:
step 901 to step 902: the UE initiates a tracking area update request or a service request through a base station, wherein the tracking area update request or the service request carries a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier, an address of an access base station and a user plane tunnel end identifier of the UE which is accessed currently.
Step 903: the mobile management unit sends an initial context establishment request message to the base station, wherein the initial context establishment request message carries the address and the tunnel end identifier of the SGW and/or the address and the tunnel end identifier of the LGW.
Step 904: the base station transmits an initial context setup response message to the mobility management unit.
Step 905: the mobility management unit sends a bearer modification request to the SGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the base station, and an indication that informs the SGW to send the address to the LGW, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 906: the SGW sends a bearer modification request to the PGW, where the bearer modification request carries a user plane address and a tunnel end identifier of the base station, and an indication that informs the PGW to send the address to the LGW, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 907: the PGW sends a modify bearer request to the LGW, where the modify bearer request carries a user plane address and a tunnel end identifier of the base station, and further may include a base station identifier, and/or a tracking area/routing area identifier, and/or a cell identifier that the UE currently accesses.
Step 908: and the LGW judges whether a direct tunnel can be established between the LGW and the base station according to the information.
Step 909: the LGW returns a modify bearer response message to the mobility management unit through the PGW and the SGW, where the modify bearer response message carries indication information of whether to establish the direct tunnel.
Step 910: and the mobile management unit judges whether to update the information of the base station according to the indication information in the modified bearing response message. If the LGW indicates that the direct tunnel cannot be established and the mobility management unit does not issue the address of the LGW and the tunnel end identifier in the handover request in step 903, step 911 does not need to be executed.
Step 911: if the LGW indicates that the direct tunnel cannot be established, and the mobility management unit issues the address of the LGW and the tunnel end identifier in the handover request in step 903, the mobility management unit sends a bearer update request to the base station, where the bearer update request carries indication information that the direct tunnel cannot be established. After receiving the indication information, the base station uses the address of the SGW and the tunnel end identifier in the subsequent operation.
If the LGW indicates that a direct tunnel can be established, and the mobility management unit issues an address of the LGW and a tunnel end identifier in a handover request in step 903, the mobility management unit sends a bearer update request to the base station, where the bearer update request carries indication information that the direct tunnel can be established. After receiving the indication information, the base station uses the address of the LGW and the tunnel end identifier in the subsequent operation.
If the LGW indicates that a direct tunnel can be established, and the mobility management unit does not issue the address and tunnel end identifier of the LGW in the handover request in step 903, the mobility management unit sends a bearer update request to the base station, where the bearer update request carries the address and tunnel end identifier of the LGW and indication information that the direct tunnel can be established. After receiving the indication information, the base station uses the address of the LGW and the tunnel end identifier in the subsequent operation.
The remaining steps of subsequently performing the tracking area update or service request, the omitted procedure is prior art, is well known to those skilled in the art, and is not relevant to the present invention, and will not be described herein.
In this embodiment, the same applies to a flow in which SGW changes. The content delivery involved in the present invention is similar if the SGW changes. The transferring of the SGW of the base station to the target SGW is involved in steps 906 to 909. Other handover signaling caused by SGW change may be different from that in this embodiment, but does not relate to the content of the present invention, and is not described herein again.
Further, the present embodiment is also applicable to a scenario in which the mobility management unit changes during the tracking area/routing area update process. If the mobility management unit changes, the mobility management unit in the figure refers to the target mobility management unit, and the interaction between the source mobility management unit and the target mobility management unit is a technique known to those skilled in the art, where the UE context information in the context response request sent by the source mobility management unit to the target mobility management unit includes information of the local gateway, and other steps and information are not related to the present invention and are not described herein again.
As can be seen from the above flow, the technical idea of implementing routing according to the present invention can be shown as fig. 10. Referring to fig. 10, fig. 10 is a simplified flowchart of implementing routing according to an embodiment of the present invention, where the flowchart includes the following steps:
step 1010: and acquiring the wireless side network element information and the LGW information related to the direct tunnel aiming at the wireless side network element to be accessed by the UE. The wireless side network element information comprises at least one of the following: closed user group identification, tracking area identification, routing area identification, base station identification and cell identification. The LGW information includes at least one of: address, domain name information.
Step 1020: determining whether a direct tunnel can be used between the wireless side network element and the LGW according to the acquired wireless side network element information and the LGW information. There are various specific determination methods, such as: according to the acquired wireless side network element information and the LGW information, the tunnel establishment configuration corresponding to the acquired information is searched in gateway information such as a relation comparison table capable of establishing a direct tunnel, and whether the direct tunnel can be used is obtained according to the searched tunnel establishment configuration.
The above gateway information may be configured statically locally, or issued dynamically through an operator management system, or obtained by querying other network elements. The other network elements include but are not limited to DNS servers, operator configuration management systems, and the like.
Step 1030: upon determining that a direct tunnel is available, establishing a direct tunnel supporting UE communication between the wireless side network element and the LGW.
In practical applications, in order to smoothly implement the above-described flow, the arrangement shown in fig. 11 may be performed. Referring to fig. 11, fig. 11 is a diagram of an apparatus for implementing routing according to an embodiment of the present invention, where the apparatus includes a direct tunnel decision information maintenance unit, a direct tunnel decision unit, and a direct tunnel execution unit, which are connected to each other. The direct tunnel decision information maintenance unit and the direct tunnel decision unit are generally disposed in the LGW, and the direct tunnel execution unit is generally disposed in the mobility management unit. In fact, the units may be separately or jointly located at various positions in the network, as long as various functions and routing can be smoothly achieved.
In practical application, the direct tunnel decision information maintenance unit may obtain and maintain the radio side network element information and LGW information related to the direct tunnel for a radio side network element to which the UE is to access, and may also send the radio side network element information and LGW information to the direct tunnel decision unit.
The direct tunnel decision unit can determine whether a direct tunnel can be used between the wireless side network element and the LGW according to the received wireless side network element information and the LGW information, and notify the direct tunnel execution unit.
And the direct tunnel execution unit establishes a direct tunnel supporting UE communication between the wireless side network element and the LGW according to the notification from the direct tunnel decision unit when the direct tunnel decision unit determines that the direct tunnel can be used.
The specific operation processes that can be implemented by the operation units are described in detail in the foregoing flow, and are not described herein again.
In summary, in both the method and the device, the technology for implementing routing selection according to the present invention can flexibly determine whether a direct tunnel needs to be established for the UE according to the contents of system information and the like in the actual application scenario, so that the flexibility of data transmission can be significantly improved, and the high efficiency of data transmission can be ensured as much as possible.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (12)
1. A method for implementing routing, the method comprising:
acquiring wireless side network element information and local gateway LGW information related to a direct tunnel aiming at a wireless side network element to be accessed by User Equipment (UE); determining whether a direct tunnel can be used between the wireless side network element and the LGW according to the acquired wireless side network element information and the LGW information;
when the determination result of determining whether the direct tunnel is usable is that the direct tunnel is usable, the method further includes:
informing the judgment result to a mobile management unit, and establishing a direct tunnel supporting UE communication between the wireless side network element and the LGW by the mobile management unit;
the operation of determining whether a direct tunnel can be used is performed in the course of at least one of:
a UE switching process;
tracking area/routing area updating or service request process of UE;
wherein, in the UE handover procedure, the LGW determines whether the direct tunnel can be used, and the specific determination procedure includes: and the LGW judges whether a direct tunnel can be established with the target base station or not according to the information of the target cell or the base station.
2. The method of claim 1, wherein the step of obtaining the information of the wireless-side network element comprises:
when the serving gateway SGW does not change, the target mobility management unit sends a bearer modification request to the LGW through the SGW and the packet data gateway PGW, and sends information of a target cell or a base station to the LGW; or,
when the SGW changes, the target mobility management unit sends a bearer creation request to the target SGW, and the target SGW sends a bearer modification request to the LGW through the PGW and sends information of a target cell or a base station to the LGW.
3. The method of claim 1, wherein the LGW determines whether the direct tunnel is available during a tracking area/routing area update or a traffic request procedure of the UE;
the specific determination process comprises the following steps: the LGW judges whether a direct tunnel can be established with the base station according to the information of the cell or the base station.
4. The method of claim 3, wherein the step of obtaining the information of the wireless-side network element comprises:
when the SGW is not changed, the mobile management unit sends a bearer modification request to the LGW through the SGW and the PGW so as to send information of a cell or a base station to the LGW; or,
when the SGW changes, the target mobility management unit sends a bearer creation request to the target SGW, and the target SGW sends a bearer modification request to the LGW through the PGW and sends information of a target cell or a base station to the LGW.
5. The method of claim 1, wherein determining whether the direct tunnel is usable or not, the LGW and the relational mapping table of the wireless side network element, which can establish the direct tunnel, are considered.
6. A device for realizing routing selection is characterized in that the device comprises a direct tunnel decision information maintenance unit and a direct tunnel decision unit; wherein,
the direct tunnel decision information maintenance unit is used for acquiring the wireless side network element information and the LGW information related to the direct tunnel aiming at the wireless side network element to be accessed by the UE;
the direct tunnel decision unit is configured to determine whether a direct tunnel can be used between the wireless side network element and the LGW according to the acquired wireless side network element information and LGW information;
when the determination result of determining whether the direct tunnel is usable is that the direct tunnel is usable, the apparatus further includes a direct tunnel execution unit;
the direct tunnel decision unit is further configured to send the determination result to the direct tunnel execution unit;
the direct tunnel execution unit is configured to establish a direct tunnel supporting UE communication between the wireless side network element and the LGW;
the direct tunnel decision unit determines whether the operation of the direct tunnel can be used in the process of at least one of the following procedures:
a UE switching process;
updating a tracking area or a routing area or a service request process of the UE;
wherein, in the UE handover process, the direct tunnel decision unit is disposed in the LGW and configured to:
and judging whether the LGW can establish a direct tunnel with the target base station or not according to the information of the target cell or the base station.
7. The apparatus of claim 6, wherein the direct tunnel decision information maintaining unit is disposed in a target mobility management unit and configured to:
when the SGW is unchanged, sending a bearer modification request to the SGW and the PGW, and sending information of a target cell or a base station contained in the bearer modification request to the direct tunnel decision unit; or,
when the SGW changes, the serving gateway SGW and the packet data gateway PGW send a bearer modification request to the LGW by sending a bearer creation request to the target serving gateway SGW, and send information of the target cell or the base station to the direct tunnel decision unit.
8. The apparatus of claim 6, wherein the direct tunnel performing unit is disposed in a mobility management unit.
9. The apparatus of claim 6, wherein in a tracking area update or routing area update or service request procedure of the UE, the direct tunnel decision unit is disposed in the LGW and configured to:
and judging whether a direct tunnel can be established with the base station according to the information of the cell or the base station.
10. The apparatus of claim 9, wherein the direct tunnel decision information maintaining unit is disposed in a target mobility management unit, and configured to:
when the SGW is unchanged, sending a bearer modification request to the SGW and the PGW, and sending information of a cell or a base station contained in the bearer modification request to the direct tunnel decision unit;
when the SGW changes, the serving gateway SGW and the packet data gateway PGW send a bearer modification request to the LGW by sending a bearer creation request to the target serving gateway SGW, and send information of the target cell or the base station to the direct tunnel decision unit.
11. The apparatus of claim 6, wherein the direct tunnel performing unit is disposed in a mobility management unit.
12. The apparatus of claim 6, wherein the direct tunnel decision unit is configured to consider gateway information including the LGW and a wireless side cell relation lookup table, which can establish the direct tunnel, when determining whether the direct tunnel is available.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010179764.3A CN102256326B (en) | 2010-05-19 | 2010-05-19 | A kind of method and apparatus realizing Route Selection |
| PCT/CN2011/073448 WO2011144000A1 (en) | 2010-05-19 | 2011-04-28 | Route selection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010179764.3A CN102256326B (en) | 2010-05-19 | 2010-05-19 | A kind of method and apparatus realizing Route Selection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102256326A CN102256326A (en) | 2011-11-23 |
| CN102256326B true CN102256326B (en) | 2016-06-15 |
Family
ID=44983250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010179764.3A Expired - Fee Related CN102256326B (en) | 2010-05-19 | 2010-05-19 | A kind of method and apparatus realizing Route Selection |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102256326B (en) |
| WO (1) | WO2011144000A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256329B (en) * | 2010-05-19 | 2016-03-02 | 中兴通讯股份有限公司 | A kind of method and apparatus realizing Route Selection |
| CN102685829B (en) * | 2012-05-11 | 2015-02-25 | 中国联合网络通信集团有限公司 | Method, device and equipment for handover of user under base station straight-through architecture |
| CN106658581A (en) * | 2015-10-30 | 2017-05-10 | 中兴通讯股份有限公司 | Method and network element for realizing mobile management |
| CN109168180B (en) | 2017-08-11 | 2020-03-10 | 华为技术有限公司 | Communication method, source base station, target base station, core network equipment and terminal equipment |
| CN109495873B (en) * | 2017-09-11 | 2020-12-04 | 大唐移动通信设备有限公司 | Route configuration method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400153A (en) * | 2007-09-27 | 2009-04-01 | 北京三星通信技术研究有限公司 | Method for direct communication by user equipment through HNB access system |
| CN101686578A (en) * | 2008-09-28 | 2010-03-31 | 中兴通讯股份有限公司 | Family evolution base station system and access method of wireless device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE480966T1 (en) * | 2005-11-15 | 2010-09-15 | Alcatel Lucent | ACCESS NETWORK, GATEWAY AND MANAGEMENT SERVER FOR A CELLULAR MOBILE COMMUNICATIONS SYSTEM |
| US8300602B2 (en) * | 2006-12-21 | 2012-10-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Arrangement and method relating to direct tunnelling in connection with handover in a communications network |
| CN101400160B (en) * | 2007-09-29 | 2013-04-10 | 北京三星通信技术研究有限公司 | Method for establishing connection by HNB |
| WO2009055827A1 (en) * | 2007-10-25 | 2009-04-30 | Starent Networks, Corp. | Interworking gateway for mobile nodes |
-
2010
- 2010-05-19 CN CN201010179764.3A patent/CN102256326B/en not_active Expired - Fee Related
-
2011
- 2011-04-28 WO PCT/CN2011/073448 patent/WO2011144000A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101400153A (en) * | 2007-09-27 | 2009-04-01 | 北京三星通信技术研究有限公司 | Method for direct communication by user equipment through HNB access system |
| CN101686578A (en) * | 2008-09-28 | 2010-03-31 | 中兴通讯股份有限公司 | Family evolution base station system and access method of wireless device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011144000A1 (en) | 2011-11-24 |
| CN102256326A (en) | 2011-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11129054B2 (en) | Methods, systems and devices for supporting local breakout in small cell architecture | |
| US8824365B2 (en) | Method for establishing connection by HNB | |
| US10779357B2 (en) | Method for avoiding handover failure | |
| CN112911726B (en) | Method and device for establishing user plane bearer | |
| CN110493887B (en) | Method and apparatus for information transmission | |
| US8582503B2 (en) | Method for indicating the bearer management of a serving gateway | |
| CN102256329B (en) | A kind of method and apparatus realizing Route Selection | |
| CN107548127A (en) | The method and apparatus for supporting data transfer | |
| AU2010284785A1 (en) | Server for control plane at mobile communication network and method for controlling SIPTO based session | |
| CN102868994A (en) | Method for supporting mobility of user equipment (UE) | |
| CN102131251A (en) | A method for forwarding data | |
| WO2011026392A1 (en) | Method and system for acquiring route strategies | |
| CN102056142B (en) | Method and system for setting local IP access downlink data channel | |
| CN102469619B (en) | A kind of mobile communication system and the method for gateway reorientation thereof | |
| CN102256326B (en) | A kind of method and apparatus realizing Route Selection | |
| CN102378160A (en) | Local access-based load bearing establishing method and system | |
| WO2012126319A1 (en) | Method and system for handing off local access service | |
| CN102026401B (en) | Mobility processing method and device | |
| WO2011157100A1 (en) | Method and system for caching data | |
| CN101583159B (en) | Method and device for realizing different network switching | |
| CN102149067B (en) | Method for managing local IP data and mobile communication system | |
| WO2012068935A1 (en) | Gateway relocation method and source shunt gateway | |
| CN101998364B (en) | Method and system for managing local internet protocol access connection | |
| WO2012167460A1 (en) | Method and apparatus for realizing mobility of local ip access or selected ip traffic offload | |
| WO2013000344A1 (en) | Method and device for processing local access connection during handover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20190519 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |