CN108924863B - Automatic configuration method and system for S11 interface - Google Patents
Automatic configuration method and system for S11 interface Download PDFInfo
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- CN108924863B CN108924863B CN201810789026.7A CN201810789026A CN108924863B CN 108924863 B CN108924863 B CN 108924863B CN 201810789026 A CN201810789026 A CN 201810789026A CN 108924863 B CN108924863 B CN 108924863B
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Abstract
The invention belongs to the technical field of mobile communication, and discloses an automatic configuration method and system of an S11 interface, when a newly added service gateway is added into a service gateway pool, an IP address and a logic name are configured for the newly added service gateway through OAM and are sent to a main service gateway in the service gateway pool, the main service gateway forwards information to a target mobility management entity in a mobility management entity pool, and then the target mobility management entity forwards the information of the newly added service gateway to other mobility management entities in the mobility management entity pool, so that all the mobility management entities in the mobility management entity pool can establish an S11 interface between the newly added service gateway and the newly added service gateway through the information of the newly added service gateway. The invention provides a definite scheme aiming at the automatic configuration process of the S11 interface in the newly added service gateway scene, which is realized based on the original system architecture and has the advantage of easy realization.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to automatic configuration of an S11 interface in an evolved packet system network.
Background
A System architecture of an Evolved Packet System (EPS) of 3GPP long term evolution is shown in fig. 1. According to the SAE (System Architecture Evolution) protocol 3GPP ts23.401v8.2.0, the System includes EPC (Evolved Packet Core) and E-UTRAN (Evolved Universal Terrestrial Radio Access Network).
The EPC includes network element devices such as an MME (Mobility Management Entity), an SGW (Serving Gateway), and a PGW (PDN Gateway). The MME provides reachability management for the UE (User Equipment), including paging of the UE in Idle state, i.e. tracking of the mobile location of the UE, and so on. The SGW provides user plane data for the UE; the PGW is a gateway of a user towards a packet data network PDN, and provides an access service towards an IP network for the UE. MME Pool is a set of multiple MMEs for load balancing purposes; SGW Pool is a collection of multiple SGWs for load balancing purposes. The E-UTRAN includes an ENB (Evolved NodeB) which mainly provides radio connection of the UE and the network.
In the above system architecture, the S10 interface is a control plane interface between two MMEs, and is based on the GTP-C protocol. The ENB is connected with the MME through an interface S1-MME (S1interface for Mobility Management) based on a Stream Control Protocol (SCTP), and the interface S1-MME transmits Control plane signaling between the MME and the ENB. The S1-MME interface is called S1interface for short. And S1-U is a user plane interface between the SGW and the ENB and is based on a GTP protocol. The S11 interface is a control plane interface between the MME and the SGW and is based on a GTPv2-C protocol.
Based on the EPS network architecture, when a new SGW joins the network in a scenario where the EPC devices such as the MME and the SGW are already deployed, an automatic configuration problem of the S11 interface may be caused. However, in the existing S11 interface related protocol TS23.401 of 3GPP, no explicit scheme is given for the S11 interface automatic configuration process in the newly added SGW scenario. Therefore, a method for automatically configuring the S11 interface in the SGW new scenario is needed.
Disclosure of Invention
The invention aims to provide an automatic configuration method and system for an S11 interface, which are used for solving the problem of automatic configuration of an S11 interface when a newly added SGW is added into a network.
The invention provides an automatic configuration method of an S11 interface, which comprises the following steps:
step S1, after a first service gateway joins a service gateway pool, OAM configures first joining information for the first service gateway, and sends the first joining information to a second service gateway in the service gateway pool;
step S2, the second serving gateway sending S11 information to a first mobility management entity in a pool of mobility management entities, the S11 information including the first joining information;
step S3, the first mobility management entity sending S10 information to a second mobility management entity, the S10 information including the first joining information;
step S4, all the mobility management entities in the mobility management entity pool establish an S11 interface with the first service gateway according to the first joining information;
the first joining information includes an IP address and a logical name of the first serving gateway, and the second mobility management entity is all other mobility management entities in the mobility management entity pool except the first mobility management entity.
Preferably, in the step S3, before the first mobility management entity sends the S10 information to the second mobility management entity, the method further includes the following steps:
the first mobility management entity acquires configuration information of the second mobility management entity from the OAM, and the first mobility management entity establishes an S10 interface with the second mobility management entity according to the configuration information;
wherein the configuration information comprises an IP address and a logical name.
Preferably, in the step S4, before all the mobility management entities in the mobility management entity pool establish the S11 interface with the first serving gateway according to the first joining information, the method further includes the following steps:
and all the mobility management entities judge whether an S11 interface is established with the first service gateway or not according to the first joining information.
Preferably, the second service gateway is a default service gateway or a service gateway with the smallest load in a service gateway pool.
Preferably, the first mobility management entity is a mobility management entity that establishes S11 connection with the second serving gateway.
Corresponding to the above method, the present invention provides an automatic configuration system for S11 interface, including: a service gateway pool, a mobility management entity pool, an OAM;
the OAM communicates with service gateways in the service gateway pool through a private interface Itf-LTE, the OAM communicates with mobility management entities in the mobility management entity pool through a private interface Itf-LTE, the service gateway pool comprises at least two service gateways, and the mobility management entity pool comprises at least two mobility management entities; the service gateway communicates with the mobility management entities through an S11 interface, and a plurality of the mobility management entities communicate with each other through an S10 interface;
the service gateway in the service gateway pool, the mobility management entity in the mobility management entity pool, and the OAM implement the steps of the above-mentioned methods.
Preferably, the OAM includes: a wireless and transmission information configuration server;
and after configuring the first joining information for the first service gateway, the OAM stores the first joining information into the wireless and transmission information configuration server.
Preferably, the service gateway includes: the system comprises a first information receiving module and a first information sending module;
the second service gateway receives the first joining information from the OAM through the first receiving module;
and the second serving gateway sends the S11 message to the first mobility management entity through the first message sending module.
Preferably, the mobility management entity includes: the system comprises a second information receiving module, an IP address acquisition module and an S11 interface establishing module;
the first mobility management entity receives the S11 information from the second serving gateway through the second information receiving module; the second mobility management entity receives the S10 information from the first mobility management entity through the second information receiving module;
the IP address acquisition module is used for acquiring the IP address of the first service gateway according to the first joining information;
the S11 interface establishing module is used for establishing an S11 interface between a mobility management entity and the first serving gateway according to the IP address of the first serving gateway.
Preferably, the IP address obtaining module includes: a logic name acquisition submodule and an IP address query submodule;
the logic name acquisition submodule is used for acquiring the logic name of the first service gateway according to the first joining information;
and the IP address query submodule is used for acquiring the IP address of the first service gateway according to the logic name of the first service gateway.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
in this embodiment of the present application, when a newly added serving gateway (i.e., a first serving gateway) joins a serving gateway pool, an IP address and a logical name are configured for the newly added serving gateway through OAM, and the newly added serving gateway is sent to a main serving gateway (i.e., a second serving gateway) in the serving gateway pool, where the main serving gateway forwards information to a target mobility management entity (i.e., a first mobility management entity) in the mobility management entity pool, and then the target mobility management entity forwards information of the newly added serving gateway to other mobility management entities (i.e., a second mobility management entity) in the mobility management entity pool, so that all mobility management entities in the mobility management entity pool can establish an S11 interface with the newly added serving gateway through the information (the IP address and the logical name) of the newly added serving gateway. In summary, the S11 interface automatic configuration scheme provided by the present invention is implemented based on the original system architecture, has the advantage of easy implementation, and provides a clear scheme for the S11 interface automatic configuration process in the new service gateway scenario.
Drawings
In order to more clearly illustrate the technical solution in the present embodiment, the drawings needed to be used in the description of the embodiment will be briefly introduced below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a system architecture diagram of system architecture evolution SAE in an S11 interface automatic configuration system according to an embodiment of the present invention;
fig. 2 is a flowchart of an S11 interface auto-configuration method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating that a newly added serving gateway SGW provides a logical name and an IP address to all mobility management entities MME in a mobility management entity Pool MME Pool in the S11 interface automatic configuration method according to the embodiment of the present invention;
fig. 4 is an interface schematic diagram of an OAM, a mobility management entity Pool MME Pool and a serving gateway Pool SGW Pool in an S11 interface automatic configuration system according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating functional modules of a serving gateway SGW in an S11 interface automatic configuration system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of functional modules of a mobility management entity MME in an S11 interface automatic configuration system according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The invention provides an automatic configuration method of an S11 interface, which mainly comprises the following steps:
A. after a new service gateway (new SGW) is added into a service gateway Pool SGW Pool, OAM (Operation, Administration and Maintenance, and management) configures a corresponding IP address and a logical name for the new SGW; an original main service gateway (main SGW) in the SGW Pool acquires an adding message of a newly added SGW from the OAM, wherein the adding message comprises an IP address and a logic name of the newly added SGW;
B. the main SGW sends an S11 message to a target mobility management entity (target MME) in a mobility management entity Pool (MME Pool), wherein the S11 message comprises a joining message of the newly added SGW;
C. the target MME acquires configuration information of other mobility management entities (other MMEs) in the MME Pool from the OAM, the target MME establishes an S10 interface with the other MMEs in the MME Pool and sends an S10 message to the other MMEs in the MME Pool, and the S10 message contains a join message of a newly added SGW;
D. and each MME in the MME Pool establishes an S11 interface between the MME and the newly added SGW according to the adding message of the newly added SGW.
The method is further described below.
Fig. 2 is a flowchart illustrating an embodiment of implementing automatic configuration of the S11 interface according to the present invention, which shows a method for performing automatic configuration of the S11 interface when a newly added SGW joins a network, and includes the following steps:
step S201, after adding the SGW Pool, the OAM pushes an adding message of the newly added SGW to the main SGW, where the adding message of the newly added SGW includes an IP address and a logical name of the newly added SGW.
Step S202, the main SGW pushes the joining message of the newly added SGW to a target MME.
Step S203, the target MME informs other MME in MME Pool of the joining message of the newly added SGW.
And S204, the MME in the MME Pool acquires the IP address and the logic name of the newly added SGW.
And step S205, the MME in the MME Pool establishes an S11 interface with the newly added SGW.
According to an embodiment of the present invention, the step S201 may include the following sub-steps:
(1) the OAM configures a corresponding IP address and a corresponding logic name for the newly added SGW;
(2) and the OAM pushes the joining message of the newly added SGW to the main SGW in the SGW Pool.
According to an embodiment of the present invention, the step S202 may include the following sub-steps:
(1) the master SGW sending an S11 message to the target MME;
(2) the target MME extracts a joining message of the newly added SGW from the S11 message, wherein the joining message comprises an IP address and a logical name of the newly added SGW;
according to an embodiment of the present invention, the step S203 may include the following sub-steps:
(1) the target MME acquires configuration information of other MME in the MME Pool from OAM, wherein the configuration information comprises IP addresses and logic names of the MME;
(2) the target MME establishes an S10 interface between the target MME and other MMEs according to the configuration information of other MMEs in the MME Pool;
(3) the target MME sends an S10 message to other MMEs in the MME Pool, wherein the S10 message comprises an IP address and a logical name of a newly added SGW;
(4) and all MME in the MME Pool judge whether the newly added SGW is a connected SGW or not according to the received adding message of the newly added SGW, and if the newly added SGW is not connected, an S11 interface between the newly added SGW and the MME Pool is established.
As shown in fig. 3, the process of the newly added SGW providing IP addresses and logical names to all MMEs in the MME Pool is further explained below, and the process includes the following steps:
step S301, the OAM sends an adding message updated by SGW Pool members, that is, adding information of a newly added SGW, to the primary SGW through a private interface Itf-LTE, where the adding message includes an IP address and a logical name of the newly added SGW.
For example, "OAM _ SGW _ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIST)" may be defined. The main SGW is an SGW that takes on a message processing task of "OAM _ SGW _ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIS)".
Step S302, the main SGW sends SGW Pool member update join information to a target MME through an S11 interface, wherein the information comprises the IP address and the logical name of the newly added SGW.
An extension message "[ GTPv2-C ] may be defined: SGW _ MME _ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIST) ". The target MME is an MME which undertakes the message processing task of 'SGW _ MME _ SgwPool _ Member _ update.Add (SGW _ NAME, SGW _ IP _ ADDRE SS _ LIST').
Step S303, after the target MME receives the "SGW _ MME _ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIST)" message pushed by the main SGW, the target MME sends an "MME _ OAM _ Get _ MmePool _ Member _ Req ()" message request to the OAM through the Itf-LTE interface.
After receiving the message of "MME _ OAM _ Get _ MmePool _ Member _ Req ()", the OAM _ MME _ Get _ MmePool _ Member _ Rsp ((MME1_ NAME, MME1_ IP _ ADDRESS _ LIST), … …, (MMEn-1_ NAME, MMEn-1_ IP _ ADDRESS _ LIST)) "is replied to the target MME, where n represents the number of MMEs in the MME Pool.
After the IP addresses and the logic names of other MME in the MME Pool are obtained from the OAM, the target MME judges whether an S10 interface is established with the other MME in the MME Pool or not, and if the S10 interface is not established, the target MME establishes an S10 interface according to the IP addresses and the logic names of the other MME in the MME Pool.
After the S10 interface is successfully established, the target MME sends an extension message "[ GTPv2-C ] to other MMEs within the MME Pool through an S10 interface: MME _ S10_ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIST) "message, the S10 message including the IP ADDRESS and logical NAME of the newly added SGW.
Step S304, the other MMEs in the MME Pool obtain the IP ADDRESS and the logical NAME of the newly added SGW from "MME _ S10_ SgwPool _ Member _ update.add (SGW _ NAME, SGW _ IP _ ADDRESS _ LIST)".
Step S305, after all the MMEs in the MME Pool obtain the logical name of the newly added SGW, first check whether the SGW is the "connected" SGW, that is, whether an S11 interface is established with the MME, if not, it indicates that the SGW is indeed the newly added SGW and an S11 interface needs to be established with the SGW.
For the newly added SGW that has been confirmed, the MME in the MME Pool uses the IP ADDRESS carried by the SGW _ IP _ ADDRESS _ LIST in "MME _ S10_ sgwwpool _ Member _ update.add (SGW _ NAME, SGW _ IP _ a DDRESS _ LIST)", and if there are multiple IP addresses, one of them is selected, and an automatic configuration process of the S11 interface is initiated to the newly added SGW. After the S11 interface is successfully established, the S11 interface considers the auto-configuration complete.
The confirmation step in step S305 is to confirm that the SGW corresponding to the logical name is indeed the newly added SGW, so as to prevent the MME from re-establishing the connection with the SGW that has already established the interface of S11, which results in waste of network resources. Whether to adopt the step S305 may be freely selected as appropriate in specific implementation.
In the method for providing the IP address and the logical name to the MME in the MME Pool by the newly added SGW, the main SGW is the SGW which undertakes the adding message processing of the newly added SGW. The selection of the primary SGW may employ the following two schemes:
(1) and default SGW: one SGW is designated as a main SGW among the SGWs in the SGW Pool, for example, the SGW that is first added to the SGW Pool may be selected as the main SGW.
(2) Load minimum SGW: and selecting the SGW with the lightest load as the main SGW according to the load information of the SGWs in the SGW Pool. This scheme is advantageous for load balancing among SGWs.
In the method for providing the IP address and the logical name to the MME in the MME Pool by the newly added SGW, the target MME is the MME which undertakes the processing of adding the message to the newly added SGW. The target MME is an MME which establishes S11 connection with the main SGW.
As shown in fig. 4, which is a schematic diagram of interfaces of OAM, MME Pool, and SGW Pool, SGW and OAM are connected through an Itf-LTE interface, MME and OAM are connected through an Itf-LTE interface, SGW and MME are connected through an S11 interface, and MME are connected through an S10 interface. When adding an SGW into an SGW Pool, OAM configures a corresponding IP address and a corresponding logic name for the SGW, and stores the IP address and the logic name in a wireless (Radio) and transmission (Transfer) information configuration server in the OAM; furthermore, a wireless and transport information configuration server in the OAM stores all SGW configuration information in the SGW Pool, where the SGW configuration information includes an IP address and a logical name of an SGW; the wireless and transmission information configuration server in OAM also stores all MME configuration information in MME Pool, and the MME configuration information comprises IP address and logic name of MME.
On the other hand, an embodiment of the present invention provides a system for automatically configuring an S11 interface when a new serving gateway SGW joins a network, where the system includes OAM, SGW Pool, and MME Pool. The SGW Pool comprises at least two SGWs, the SGWs and the MME communicate through an S11 interface, and the MME between the MME pools communicates through an S10 interface. And the MME in the MME Pool establishes an S11 interface with the newly added SGW according to the IP address of the newly added SGW.
In the above embodiment, the SGW Pool includes a master SGW, and the MME Pool includes a target MME. The main SGW is used for receiving the adding message of the newly added SGW sent by OAM and sending the adding message of the newly added SGW to the target MME; and the target MME sends a joining message of the newly added SGW to other MME in the MME Pool. And the MME in the MME Pool judges whether the newly added SGW is the connected SGW according to the logical name of the newly added SGW, and if not, an S11 interface needs to be established with the newly added SGW.
Fig. 5 is a schematic diagram of functional modules of an SGW according to the present invention, including: an SGW join message receiving module (i.e., a first information receiving module) that receives a join message of a newly added SGW sent by the OAM; and the SGW joining message sending module (i.e. the first information sending module) is used for sending a joining message of the newly added SGW to the target MME.
Fig. 6 is a schematic diagram of functional modules of an MME according to the present invention. The role of the MME is different, and the specific role of the module is correspondingly different, specifically as follows:
1, when the MME is a target MME, the functional module structure includes:
an SGW join message receiving module (i.e., a second information receiving module) that receives a join message of a newly added SGW sent by the master SGW;
the IP address acquisition module is used for acquiring the IP address of the newly added SGW according to the adding message of the newly added SGW;
and the S11 interface establishing module is used for establishing an S11 interface with the newly added SGW according to the adding message of the newly added SGW.
2, when the MME is a non-target MME in the MME Pool, that is, other MMEs, the functional module structure includes:
an SGW join message receiving module (i.e., a second information receiving module) that receives a join message of a newly added SGW sent by the target MME;
the IP address acquisition module is used for acquiring the IP address of the newly added SGW according to the adding message of the newly added SGW;
and the S11 interface establishing module is used for establishing an S11 interface with the newly added SGW according to the IP address of the newly added SGW.
In the foregoing embodiment, the IP address obtaining module includes:
the SGW logic name acquisition submodule is used for acquiring the logic name of the newly added SGW according to the adding message of the newly added SGW;
and the IP address query submodule is used for querying the IP address of the newly added SGW according to the logic name of the newly added SGW.
According to an aspect of the present invention, the IP address querying module is configured to query, based on the logical name of the newly added SGW, an IP address of the newly added SGW to a wireless and transport information configuration server in OAM.
The method and the system for automatically configuring the S11 interface provide a clear and feasible scheme for automatically configuring the S11 interface when a newly added SGW is added into a network, and the scheme is based on the original system architecture and is easy to realize.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. An automatic configuration method for an S11 interface is characterized by comprising the following steps:
step S1, after a first service gateway joins a service gateway pool, OAM configures first joining information for the first service gateway, and sends the first joining information to a second service gateway in the service gateway pool;
step S2, the second serving gateway sending S11 information to a first mobility management entity in a pool of mobility management entities, the S11 information including the first joining information;
step S3, the first mobility management entity sending S10 information to a second mobility management entity, the S10 information including the first joining information;
step S4, all the mobility management entities in the mobility management entity pool establish an S11 interface with the first service gateway according to the first joining information;
the first joining information includes an IP address and a logical name of the first serving gateway, and the second mobility management entity is all other mobility management entities in the mobility management entity pool except the first mobility management entity.
2. The S11 interface auto-configuration method according to claim 1, wherein before the first mobility management entity sending S10 information to the second mobility management entity in the step S3, further comprising the steps of:
the first mobility management entity acquires configuration information of the second mobility management entity from the OAM, and the first mobility management entity establishes an S10 interface with the second mobility management entity according to the configuration information;
wherein the configuration information comprises an IP address and a logical name.
3. The S11 interface auto-configuration method according to claim 1 or 2, wherein before all the mobility management entities in the mobility management entity pool establish the S11 interface with the first serving gateway according to the first joining information in the step S4, the method further comprises the following steps:
and all the mobility management entities judge whether an S11 interface is established with the first service gateway or not according to the first joining information.
4. The S11 interface auto-configuration method according to claim 1, wherein the second service gateway is a default service gateway or a least loaded service gateway in a service gateway pool.
5. The S11 interface auto-configuration method of claim 1, wherein the first mobility management entity is a mobility management entity that establishes an S11 connection with the second serving gateway.
6. An S11 interface auto-configuration system, comprising: a service gateway pool, a mobility management entity pool, an OAM;
the OAM communicates with service gateways in the service gateway pool through a private interface Itf-LTE, the OAM communicates with mobility management entities in the mobility management entity pool through a private interface Itf-LTE, the service gateway pool comprises at least two service gateways, and the mobility management entity pool comprises at least two mobility management entities; the service gateway communicates with the mobility management entities through an S11 interface, and a plurality of the mobility management entities communicate with each other through an S10 interface;
a serving gateway in the pool of serving gateways, a mobility management entity in the pool of mobility management entities, the OAM implementing the steps of the method of any of claims 1-5.
7. The S11 interface autoconfiguration system of claim 6, wherein the OAM comprises: a wireless and transmission information configuration server;
and after configuring the first joining information for the first service gateway, the OAM stores the first joining information into the wireless and transmission information configuration server.
8. The S11 interface auto-configuration system of claim 6, wherein the service gateway comprises: the system comprises a first information receiving module and a first information sending module;
the second service gateway receives the first joining information from the OAM through the first information receiving module;
and the second serving gateway sends the S11 message to the first mobility management entity through the first message sending module.
9. The S11 interface auto-configuration system of claim 6, wherein the mobility management entity comprises: the system comprises a second information receiving module, an IP address acquisition module and an S11 interface establishing module;
the first mobility management entity receives the S11 information from the second serving gateway through the second information receiving module; the second mobility management entity receives the S10 information from the first mobility management entity through the second information receiving module;
the IP address acquisition module is used for acquiring the IP address of the first service gateway according to the first joining information;
the S11 interface establishing module is used for establishing an S11 interface between a mobility management entity and the first serving gateway according to the IP address of the first serving gateway.
10. The S11 interface autoconfiguration system of claim 9, wherein the IP address acquisition module comprises: a logic name acquisition submodule and an IP address query submodule;
the logic name acquisition submodule is used for acquiring the logic name of the first service gateway according to the first joining information;
and the IP address query submodule is used for acquiring the IP address of the first service gateway according to the logic name of the first service gateway.
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