WO2012159411A1

WO2012159411A1 - Network access method, base station and user equipment

Info

Publication number: WO2012159411A1
Application number: PCT/CN2011/081056
Authority: WO
Inventors: 孙伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-05-25
Filing date: 2011-10-20
Publication date: 2012-11-29
Also published as: CN102802273A; CN102802273B

Abstract

Disclosed are a network access method, base station and user equipment. The method includes: a base station detecting whether or not the S1 connection between itself and an MME is abnormal; and when an exception is detected, then the base station determining the UE corresponding to the S1 connection and indicating the determined UE to initiate a TAU and re-access the network. Correspondingly, also disclosed are a base station and user equipment. The technical solution in the present invention solves the problem in the prior art that it takes a relatively long time when the UE re-accesses the network and the UE and the network side also have to perform a lot of signalling interaction.

Description

Network input method, base station and user equipment

The present invention relates to the field of communications technologies, and in particular, to a network access method, a base station, and a user equipment. Background technique

In the Evolved Packet System (EPS), the pool mechanism in the Universal Mobile Telecommunications System (UMTS) is used, and one or more mobility management entities (MME, Mobility Management Entity) The MME Pool is formed, and the MME Pool is a complete tracking area (TA, Tracking Area) set, and different MME Pools can be superimposed on each other.

The Pool solution in the 3rd Generation Partnership Project (3GPP) has a good disaster recovery function and greatly optimizes the carrier network. The wireless access network node can establish a connection with multiple core network nodes in the pool. For example, the base station can simultaneously establish a Stream Control Transmission Protocol (SCTP) coupling with multiple MMEs in the MME Pool.

When the SI connection between the base station and the MME in the MME Pool is abnormal, the base station and the MME release the context information of the user equipment (UE, User Equipment) corresponding to the S1 connection in the abnormal state, and the UE disconnects from the network side. After that, the user needs to re-attach to access the network, that is, the UE needs to perform reconstruction and authentication of the entire EPC-side bearer to access the network, thereby restoring the connection and service with the network side. It can be seen that if the S1 connection between the MME and the MME in the MME Pool is abnormal, it takes a long time for the UE to re-access the network, and more signaling interaction needs to be performed between the UE and the network side. . Summary of the invention

The embodiments of the present invention provide a network access method, a base station, and a user equipment, which are used to solve the problem that the UE needs to perform a long time when the UE reconnects to the network. The problem of making interactions.

The technical solutions of the embodiments of the present invention are as follows:

A network access method, the method includes: the base station detects whether an S1 connection with the MME is abnormal; when detecting an abnormality, the base station determines each user equipment UE corresponding to the S1 connection; and indicates to determine Each UE initiates a tracking area update TAU and re-accesses the network.

In the foregoing solution, the detecting, by the base station, whether the S1 connection with the MME is abnormal, the method includes: detecting, by the base station, whether a flow control transmission protocol SCTP coupling with the MME is disconnected; detecting between the MME and the MME When the SCTP coupling is broken, it is confirmed that the S1 connection with the MME is abnormal.

In the above solution, the determining, by the base station, the UEs corresponding to the S1 connection, the method includes: obtaining, by the base station, a coupling identifier of each UE that is established by the S1 connection on the SCTP coupling, and according to the obtained coupling The identifier determines each UE corresponding to the S1 connection.

In the above solution, the detecting, by the base station, whether the S1 connection with the MME is abnormal includes: detecting, by the base station, whether an S1 connection with the MME is incorrect, and when detecting an S1 connection error with the MME, Then, it is confirmed that the S1 connection with the MME is abnormal.

In the above solution, the determining, by the base station, the UEs corresponding to the S1 connection, the method includes: obtaining, by the base station, a coupling identifier of each UE on the S1 connection, and determining, according to the obtained coupling identifier, the S1 connection. Corresponding UEs.

In the above solution, the determining, by the UE, that the UE initiates the TAU, the: the base station sends a radio resource control protocol RRC connection release message to the determined UE, where the RRC connection release message is used to indicate that the UE initiates The indication information of the TAU; the UE sends an RRC connection establishment request to the base station according to the indication information carried in the RRC connection release message The eNB sends an RRC connection setup message to the UE; after receiving the RRC connection setup message, the UE re-establishes an RRC connection, and after the RRC connection is successfully established, sends an RRC connection setup to the base station. a message, the RRC connection setup complete message carries a TAU request message; after receiving the TAU request message, the base station selects an MME that provides mobility management for the UE; and carries the received TAU request message in The initial UE message is sent to the selected MME, and the selected MME performs TAIL for the UE.

In the above solution, selecting an MME that provides mobility management for the UE includes: determining, by the base station, an MME that is registered by the UE; and determining whether an S1 connection between the base station and the determined MME is restored to normal. If the determination result is yes, the base station selects the determined MME to provide mobility management for the UE; if the determination result is no, the base station selects other MMEs other than the determined MME as the The UE provides mobility management.

In the above solution, the determining, by the base station, the MME that the UE has been registered includes: determining, by the base station, whether the received RRC connection setup request message carries the temporary mobile subscriber identity S-TMSI of the UE; If yes, the base station determines, according to the S-TMSI, the MME that the UE has registered; if the determination result is no, the base station determines whether the received RRC connection setup complete message carries the MME identifier, When determining that the MME identifier is carried, the base station determines, according to the MME identifier, the MME that the UE has registered.

a base station, the base station includes: a connection detecting unit, configured to detect whether an S1 connection between the base station and the MME is abnormal; and a user equipment determining unit, configured to determine, when the connection detecting unit detects an abnormality, The S1 is connected to the corresponding user equipment UE. The tracking area update indication unit is configured to instruct the UEs determined by the user equipment determining unit to initiate a tracking area update TAU and re-access the network.

In the foregoing solution, the connection detecting unit includes: a coupling detecting subunit, configured to detect whether the SCTP coupling between the base station and the MME is disconnected; and a first connection confirming subunit, configured to: When the coupling detection subunit detects disconnection of SCTP coupling with the MME, it is confirmed that the S1 connection abnormality with the MME is abnormal.

In the foregoing solution, the user equipment determining unit includes: a first coupling identifier obtaining subunit, configured to obtain a coupling identifier of each UE established by the S1 connection on the SCTP coupling; the first user equipment determining subunit And determining, according to the first coupling identifier, the coupling identifier obtained by the subunit, determining each UE corresponding to the S1 connection.

In the above solution, the connection detecting unit includes: a connection detecting subunit, configured to detect whether an S1 connection between the base station and the MME is incorrect; and a second connection confirming subunit, configured to detect in the connection detecting subunit When the S1 connection error with the MME is incorrect, it is confirmed that the S1 connection with the MME is abnormal.

In the above solution, the user equipment determining unit includes: a second coupling identifier obtaining subunit, configured to obtain a coupling identifier of each UE on the S1 connection; and a second user equipment determining subunit, configured to The second coupling identifier obtains the coupling identifier obtained by the subunit, and determines each UE corresponding to the S1 connection.

In the foregoing solution, the tracking area update indication unit includes: a first message sending subunit, configured to send, to each UE determined by the user equipment determining unit, a radio resource control protocol RRC connection release message, where the RRC connection release message is The first message receiving subunit is configured to receive an RRC connection setup request message sent by the UE, and the second message sending subunit is configured to send an RRC connection setup message to the UE, where a second message receiving subunit, configured to receive an RRC connection setup complete message sent by the UE, where the RRC connection setup complete message carries a TAU request message, and a selection subunit, configured to receive the second message receiving subunit After the TAU request message is selected, the MME that provides the mobility management for the UE is selected; the third message sending subunit is configured to carry the TAU request message received by the second message receiving subunit in the initial UE message and send the message to the selector. The MME selected by the unit, and the MME selected by the selecting subunit performs TAIL for the UE. In the foregoing solution, the selecting subunit includes: a mobility management entity determining module, configured to determine an MME that the UE has registered; a state determining module, configured to determine, by the base station, the MME determined by the mobility management entity determining module Whether the S1 connection is restored to the normal state; the first selecting module is configured to: when the judgment result of the state judging module is yes, select the MME determined by the mobility management entity determining module to provide mobility management for the UE; And a selection module, configured to: when the judgment result of the state determination module is negative, select another MME other than the MME determined by the mobility management entity determining module to provide mobility management for the UE.

In the above solution, the mobility management entity determining module includes: a first determining submodule, configured to determine whether the S-TMSI of the UE is carried in the RRC connection setup request message received by the first message receiving subunit; a first mobility management entity determining submodule, configured to determine, according to the S-TMSI, an MME that is registered by the UE, when the judgment result of the first determining submodule is yes; When the determination result of the first determining sub-module is NO, determining whether the RRC connection setup complete message received by the second message receiving sub-unit carries the MME identifier; the second mobility management entity determines the sub-module, And determining, when the judgment result of the second determining submodule is YES, determining, according to the MME identifier, the MME that the UE has registered.

A user equipment, comprising: a connection release message receiving unit, configured to receive an RRC connection release message sent by the base station, where the RRC connection release message carries indication information for instructing the user equipment UE to initiate a TAU; the connection establishment request message sending unit And the RRC connection setup request message is sent to the base station according to the indication information carried in the RRC connection release message; the connection setup message receiving unit is configured to receive an RRC connection setup message sent by the base station; a unit, configured to: after receiving the RRC connection setup message, re-establish an RRC connection; the connection setup complete message sending unit, configured to send an RRC connection setup complete message to the base station after the RRC connection is successfully established, where The RRC connection setup complete message carries a TAU request message.

The beneficial effects of the present invention are as follows: In the technical solution of the embodiment of the present invention, the base station first detects and Whether the SI connection between the MMEs is abnormal. If an abnormality is detected, the base station determines each UE corresponding to the S1 connection, and instructs the determined UEs to initiate tracking area update and re-access the network. It can be seen that the technical solution of the embodiment of the present invention, when the S1 connection between the base station and the MME is abnormal, instructs the UE to initiate a tracking area update process, and re-accesses the network, without requiring the UE to re-execute the attach process, thereby avoiding the UE being in the entire EPC. The side performs the reconstruction and authentication of the bearer, so that the time for the UE to re-access the network can be effectively shortened, and the signaling interaction between the UE and the network side is reduced. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic flowchart of a network access method according to an embodiment of the present invention;

2 is a schematic flowchart of a specific implementation process of a network access method according to Embodiment 1 of the present invention; FIG. 3 is a schematic flowchart of a specific implementation process of a network access method according to Embodiment 2 of the present invention; Schematic diagram of the specific implementation of TAU;

FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a composition of a UE according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 1 , it is a flowchart of a network access method in an embodiment of the present invention, and the specific processing procedure is as follows:

Step 11: The base station detects whether the S1 connection with the MME is abnormal. The embodiment of the present invention provides that the S1 connection abnormality between the base station and the MME in the MME Pool may be, but is not limited to, including the following two abnormal situations:

In the first abnormal situation, the SCTP coupling between the base station and the MME in the MME Pool is disconnected; in the second abnormal situation, the S1 connection between the base station and the MME in the MME Pool is incorrect. For the first abnormal situation, when the base station detects whether the S1 connection with the MME is abnormal, it first detects whether the SCTP coupling with the MME is disconnected, and if the SCTP coupling disconnection with the MME is detected, And confirming that the S1 connection is abnormal with the MME, where the base station receives the disconnection message sent by the MME, and confirms that the SCTP coupling is disconnected from the MME, that is, indirectly detects whether the SCTP coupling is disconnected, and if The base station directly detects that the SCTP coupling is disconnected, and sends a disconnect message to the MME.

For the second abnormal situation, when the base station detects whether the S1 connection with the MME is abnormal, it first detects whether the S1 connection with the MME is incorrect, and if it detects that the S1 connection with the MME is

If the S1 connection is incorrect, it is confirmed that the S1 connection with the MME is abnormal.

Step 12: If an abnormality is detected, the base station determines each UE corresponding to the S1 connection. For the first abnormal situation, when determining, by the base station, each UE corresponding to the S1 connection, the base station first obtains an S1 connection established in the SCTP. The coupling identifier (ID, Identity) of each UE is coupled, and then determining, according to the obtained coupling ID, each UE corresponding to the S1 connection;

For the second abnormal situation, when the base station determines each UE corresponding to the S1 connection, the base station first obtains the coupling ID of each UE on the S1 connection, and then determines the coupling ID according to the obtained coupling ID.

S1 connects the corresponding UEs.

In the embodiment of the present invention, each UE determined by the base station is a UE in a connected state.

Step 13: Instruct the determined UE to initiate a tracking area update (TAU, Tracking Area)

Update ), reconnect to the network.

The process of the base station instructing the determined UE to initiate the TAU may be, but is not limited to, the following: The base station sends a radio resource control protocol to each of the determined UEs (RRC, Radio Resource) a connection release message, where the RRC connection release message carries indication information for instructing the UE to initiate a TAU, and the indication information may be, but is not limited to, a new cause value "SI Fail TAU Required" in the RRC connection release message; Sending, by the base station, an RRC connection setup request message to the base station according to the indication information carried in the RRC connection release message; the base station sends an RRC connection setup message to the UE; after receiving the RRC connection setup message, the UE receives the RRC connection setup message, Reestablishing the RRC connection, and after the RRC connection is successfully established, sending an RRC connection setup complete message to the base station, where the RRC connection setup complete message carries the TAU request message; after receiving the TAU request message, the base station selects the The UE provides the mobility management MME; the received TAU request message is carried in the initial UE message and sent to the selected MME, and the selected MME performs the TAIL for the UE.

When the eNB selects the MME for the UE, the MME can select the MME that the UE accesses before, and can also select other MMEs. The specific selection mode is as follows:

The eNB determines the MME that is already registered by the UE, that is, the previously accessed MME, and then determines whether the S1 connection with the determined MME is restored to the normal state. If the determination result is yes, the base station selects the determined MME as The UE provides mobility management. If the determination result is no, the base station may determine, according to the temporary mobile subscriber identity (S-TMSI, S-Temporary Mobile Subscriber Identity) or the MME identity of the registered MME, the MME that the UE has registered. , Specifically:

The base station first determines whether the received RRC connection setup request message carries the S-TMSI of the UE, and if the determination result is yes, the base station directly determines, according to the S-TMSI, the MME that the UE has registered, if it is determined If the result is no, the base station may continue to determine whether the received RRC connection setup complete message carries the MME identity. If the determination result is yes, the base station determines, according to the MME identity, the MME that the UE has registered.

If the RRC connection setup request message does not carry the S-TMSI, and the RRC connection establishment is completed. The MME is not carried in the message, and the base station can select the default MME to provide mobility management for the UE according to a preset policy.

If the base station selects the MME that is accessed by the UE to provide mobility management for the UE, the base station transparently transmits the TAU request message carried by the UE in the RRC connection setup complete message to the MME, and after receiving the TAU request message, the MME performs the TAU process. In this way, only the radio side bearer needs to be reconstructed in the TAU process, and the core network only needs to update the UE context and bear the information of the base station side, and it is not necessary to re-establish the context and the bearer on the EPC side.

If the base station selects another MME (ie, a new MME) to provide mobility management for the UE, the base station transparently transmits the TAU request message carried in the RRC connection setup complete message to the selected new MME, and the new MME receives the TAU request message. And searching for the MME accessed by the UE according to the information carried in the TAU request message, and sending a context request message to the UE to obtain context information of the UE, and performing a subsequent TAU procedure. Therefore, it is only necessary to re-establish the wireless side bearer and the S1 interface bearer in the TAU process, and it is not necessary to re-establish the context and bearer on the EPC side.

According to the foregoing process, in the technical solution of the embodiment of the present invention, the base station first detects whether the S1 connection with the MME is abnormal. If an abnormality is detected, the base station determines each UE corresponding to the S1 connection, and indicates the determined each. The UE initiates a tracking area update and re-accesses the network. It can be seen that, when the S1 connection between the base station and the MME is abnormal, the technical solution of the embodiment of the present invention instructs the UE to initiate a tracking area update process, and re-accesses the network, without requiring the UE to re-execute the attach process, thereby avoiding the UE being in the entire EPC. The side performs the reconstruction and authentication of the bearer, so that the time for the UE to re-access the network can be effectively shortened, and the signaling interaction between the UE and the network side is reduced.

More specific embodiments are given below.

Embodiment 1

As shown in FIG. 2, in the first embodiment of the present invention, when the SCTP coupling between the base station and the MME is disconnected, the specific implementation process of the network access method is as follows:

Step 21: The base station detects that the SCTP coupling is disconnected from the MME, where the base station is connected. After receiving the disconnection message sent by the MME, confirming that the SCTP coupling with the MME is disconnected, or the base station detects that the SCTP coupling with the MME is disconnected, sending a disconnect message to the MME; Step 22, the base station Obtaining a coupling ID of each UE established by the S1 connection on the SCTP coupling; Step 23, the base station determines, according to the obtained coupling ID, each UE corresponding to the SI connection;

Step 24: The base station instructs each UE that is determined to initiate a TAU and re-accesses the network.

The eNB sends an RRC connection release message to each of the determined UEs, where the newly added cause value is "SI Fail TAU Required". After receiving the RRC connection release message, the UE passes the RRC connection setup request message, the RRC connection setup message, and The RRC connection setup complete message re-establishes the RRC connection, initiates a TAU procedure, and re-accesses the network.

Embodiment 2

As shown in FIG. 3, in the second embodiment of the present invention, when the S1 connection between the base station and the MME is incorrect, the specific implementation process of the network access method is as follows:

Step 31: The base station detects that the S1 connection between the MME and the MME is disconnected.

Step 32: The base station obtains a coupling ID of each UE on the S1 connection.

Step 33: The base station determines, according to the obtained coupling ID, each UE corresponding to the S1 connection;

Step 34: The base station instructs each UE that is determined to initiate a TAU and re-accesses the network.

As shown in FIG. 4, in the embodiment of the present invention, a specific implementation process of a base station instructing a UE to initiate a TAU is as follows:

Step 41: The base station sends an RRC connection release message to each of the determined UEs, where the RRC connection release message carries the indication information that is used to indicate that the UE initiates the TAU, and the indication information may be, but not limited to, an RRC connection release message. Added reason value "SI Fail TAU Required";

Step 42: The UE sends an RRC connection setup request message to the base station according to the indication information carried in the RRC connection release message.

Step 43: The base station sends an RRC connection setup message to the UE.

Step 44: After receiving the RRC connection setup message, the UE re-establishes an RRC connection;

Step 45: After the RRC connection is successfully established, the UE sends an RRC connection setup complete message to the base station, where the RRC connection setup complete message carries a TAU request message.

Step 46, the base station determines whether the received RRC connection setup request message carries the S-TMSI of the UE, if the determination result is yes, then go to step 47, if the determination result is no, then go to step 48;

Step 47, the base station directly determines, according to the S-TMSI, the MME that the UE has registered, and then proceeds to step 49;

Step 48, the base station determines the MME that the UE has registered according to the MME identity carried in the received RRC connection setup complete message, and then proceeds to step 49;

Step 49: The base station determines whether the S1 connection between the MME and the determined MME is restored to the normal state. If the determination result is yes, the process goes to step 410. If the determination result is no, the process goes to step 413. Step 410: The base station selects The determined MME provides mobility management for the UE, that is, the MME accessed by the base station before selecting the UE provides mobility management for the UE;

Step 411: The base station transparently transmits the TAU request message carried in the RRC connection setup complete message to the MME accessed by the UE.

Step 412: After receiving the TAU request message, the MME accessed by the UE performs a TAU process.

Step 413: The base station selects another MME other than the determined MME to provide mobility management for the UE, that is, the base station selects a new MME to provide mobility management for the UE. Step 414, the base station transparently transmits the TAU request message carried by the UE in the RRC connection setup complete message to the new MME.

Step 415: After receiving the TAU request message, the new MME searches for the MME previously accessed by the UE according to the information carried in the TAU request message.

Step 416: The new MME sends a context request message to the MME that is accessed by the UE to obtain the context information of the UE, and performs a subsequent TAU process.

Correspondingly, the embodiment of the present invention further provides a base station, the composition of which is shown in FIG. 5. The base station includes a connection detecting unit 51, a user equipment determining unit 52, and a tracking area update indicating unit 53, where:

The connection detecting unit 51 is configured to detect whether the S1 connection between the base station and the MME is abnormal. The user equipment determining unit 52 is configured to determine, when the connection detecting unit 51 detects an abnormality, each UE corresponding to the S1 connection;

The tracking area update instructing unit 53 is configured to instruct each UE determined by the user equipment determining unit 52 to initiate a TAU and re-access the network.

Preferably, the connection detecting unit 51 includes a coupling detecting subunit and a first connection confirming subunit, wherein: a coupling detecting subunit, configured to detect whether the SCTP coupling between the base station and the MME is disconnected; The connection confirmation subunit is configured to confirm that the S1 connection abnormality with the MME is abnormal when the coupling detection subunit detects disconnection of the SCTP coupling with the MME.

More preferably, the user equipment determining unit 52 includes a first coupling identifier obtaining subunit and a first user equipment determining subunit, wherein: a first coupling identifier obtaining subunit, configured to obtain the S1 connection established in the SCTP a coupling ID of each UE coupled to the first user equipment determining subunit, configured to obtain, according to the first coupling identifier, the coupling ID obtained by the subunit, and determine each UE corresponding to the S1 connection.

Preferably, the connection detecting unit 51 includes a connection detecting subunit and a second connection confirming subunit, where: a connection detecting subunit, configured to detect whether the S1 connection between the base station and the MME is wrong The second connection confirmation subunit is configured to confirm that the S1 connection abnormality between the base station and the MME is abnormal when the connection detection subunit detects an S1 connection error between the base station and the MME.

More preferably, the user equipment determining unit 52 includes a second coupling identifier obtaining subunit and a second user equipment determining subunit, where: a second coupling identifier obtaining subunit, configured to obtain each UE on the S1 connection And a second user equipment determining subunit, configured to obtain, according to the second coupling identifier, the coupling ID obtained by the subunit, and determine each UE corresponding to the SI connection.

Preferably, the tracking area update indication unit 53 includes a first message sending subunit, a first message receiving subunit, a second message sending subunit, a second message receiving subunit, a selecting subunit, and a third message sending subunit. among them:

a first message sending subunit, configured to send an RRC connection release message to each UE determined by the user equipment determining unit 52, where the RRC connection release message carries indication information for instructing the UE to initiate a TAU;

a first message receiving subunit, configured to receive an RRC connection setup request message sent by the UE, a second message sending subunit, configured to send an RRC connection setup message to the UE, and a second message receiving subunit, configured to receive the An RRC connection setup complete message sent by the UE, where the RRC connection setup complete message carries a TAU request message;

And selecting a subunit, configured to: after the second message receiving subunit receives the TAU request message, select an MME that provides mobility management for the UE;

a third message sending subunit, configured to carry the TAU request message received by the second message receiving subunit in an initial UE message and sent to the MME selected by the selecting subunit, where the MME selected by the selecting subunit is the UE Conduct TAIL

More preferably, the selecting subunit includes a mobility management entity determining module, a state judging module, a first selecting module, and a second selecting module, where: a mobility management entity determining module, configured to determine an MME that the UE has registered; a determining module, configured to determine whether the S1 connection between the MME and the MME determined by the mobility management entity determining module is restored to a normal state; a selection module, configured to: when the judgment result of the state judging module is yes, select the MME determined by the mobility management entity determining module to provide mobility management for the UE; and the second selecting module, configured to determine that the state judging module is Otherwise, the MME other than the MME determined by the mobility management entity determining module is selected to provide mobility management for the UE.

More preferably, the mobility management entity determining module may include a first determining submodule, a first mobility managing entity determining submodule, a second determining submodule, and a second mobility managing entity determining submodule, where:

a first determining sub-module, configured to determine whether the S-TMSI of the UE is carried in the RRC connection setup request message received by the first message receiving sub-unit;

a first mobility management entity determining submodule, configured to determine, according to the S-TMSI, an MME that the UE has registered, when the determination result of the first determining submodule is YES;

a second determining sub-module, configured to determine whether the RRC connection setup complete message received by the second message receiving sub-unit carries the MME identifier when the determining result of the first determining sub-module is no;

And a second mobility management entity determining submodule, configured to determine, according to the MME identity, the MME that the UE has registered, when the determination result of the second determining submodule is yes.

Correspondingly, the embodiment of the present invention further provides a UE, whose composition is as shown in FIG. 6. The UE may include a connection release message receiving unit 61, a connection establishment request message sending unit 62, a connection establishment message receiving unit 63, and a connection. The establishing unit 64 and the connection establishment completion message transmitting unit 65, wherein:

The connection release message receiving unit 61 is configured to receive an RRC connection release message sent by the base station, where the RRC connection release message carries indication information for instructing the UE to initiate a TAU, and a connection establishment request message sending unit 62 is configured to use, according to the RRC Sending the RRC connection setup request message to the base station by using the indication information carried in the connection release message;

a connection establishment message receiving unit 63, configured to receive an RRC connection setup sent by the base station The connection establishing unit 64 is configured to re-establish an RRC connection after receiving the RRC connection setup message.

The connection establishment completion message sending unit 65 is configured to send an RRC connection setup complete message to the base station after the RRC connection is successfully established, where the RRC connection setup complete message carries a TAU request message.

The above description shows and describes a preferred embodiment of the present invention, but as described above, it should be understood that the present invention is not limited to the forms disclosed herein, and should not be construed as Other combinations, modifications, and environments are possible and can be modified by the teachings or related art or knowledge within the scope of the inventive concept described herein. All changes and modifications made by those skilled in the art are intended to be within the scope of the appended claims.

Claims

Claim

A network access method, the method comprising:

The base station detects whether the S1 connection with the mobility management entity MME is abnormal;

When detecting an abnormality, the base station determines each user equipment UE corresponding to the S1 connection, and instructs each determined UE to initiate a tracking area update TAU and re-accesses the network.

The method according to claim 1, wherein the detecting, by the base station, whether the S1 connection with the MME is abnormal, includes:

The base station detects whether the flow control transmission protocol SCTP coupling with the MME is disconnected; when detecting that the SCTP coupling with the MME is disconnected, it confirms that the S1 connection with the MME is abnormal.

The method according to claim 2, wherein the determining, by the base station, the UEs corresponding to the S1 connection, includes:

And obtaining, by the base station, a coupling identifier of each UE that is established by the S1 connection on the SCTP coupling, and determining, according to the obtained coupling identifier, each UE corresponding to the S1 connection.

The base station detects whether the S1 connection with the MME is erroneous, and when detecting an S1 connection error with the MME, confirms that the S1 connection with the MME is abnormal.

The method according to claim 4, wherein the determining, by the base station, the UEs corresponding to the S1 connection, includes:

And obtaining, by the base station, a coupling identifier of each UE on the S1 connection, and determining, according to the obtained coupling identifier, each UE corresponding to the S1 connection.

The method according to claim 1, wherein the instructing each UE to initiate a TAU includes:

Sending, by the base station, a radio resource control protocol RRC connection release message to each determined UE, The RRC connection release message carries indication information for instructing the UE to initiate a TAU;

Sending, by the UE, an RRC connection setup request message to the base station according to the indication information carried in the RRC connection release message;

Sending, by the base station, an RRC connection setup message to the UE;

After receiving the RRC connection setup message, the UE re-establishes an RRC connection, and after the RRC connection is successfully established, sends an RRC connection setup complete message to the base station, where the RRC connection setup complete message carries a TAU request message. ;

After receiving the TAU request message, the base station selects an MME that provides mobility management for the UE; and carries the received TAU request message in an initial UE message and sends the message to the selected MME, where the selected MME is selected. TAIL for the UE

7. The method of claim 6, wherein selecting an MME that provides mobility management for the UE comprises:

Determining, by the base station, the MME that is registered by the UE; and determining whether the S1 connection between the base station and the determined MME is restored to a normal state;

If the determination result is yes, the base station selects the determined MME to provide mobility management for the UE; if the determination result is no, the base station selects other MMEs other than the determined MME to provide the UE with the MME. Mobility management.

The method according to claim 7, wherein the determining, by the base station, the MME that the UE has registered includes:

The base station determines whether the received RRC connection setup request message carries the temporary mobile subscriber identity S-TMSI of the UE;

If the determination result is yes, the base station determines, according to the S-TMSI, the MME that the UE has registered; if the determination result is no, the base station determines whether the received RRC connection setup complete message carries the MME. And determining, when determining that the MME identifier is carried, the base station determines, according to the MME identifier, the MME that the UE has registered.

A base station, the base station comprising:

a connection detecting unit, configured to detect whether the S1 connection between the base station and the MME is abnormal; the user equipment determining unit, configured to determine, when the connection detecting unit detects an abnormality, each user equipment UE corresponding to the S1 connection;

The tracking area update indication unit is configured to instruct each UE determined by the user equipment determining unit to initiate a tracking area update TAU and re-access the network.

The base station according to claim 9, wherein the connection detecting unit comprises: a coupling detecting subunit, configured to detect whether the SCTP coupling between the base station and the MME is disconnected;

And a first connection confirmation subunit, configured to confirm an S1 connection abnormality with the MME when the coupling detection subunit detects that the SCTP coupling is disconnected from the MME.

The base station according to claim 10, wherein the user equipment determining unit comprises:

a first coupling identifier obtaining subunit, configured to obtain a coupling identifier of each UE established by the S1 connection on the SCTP coupling;

And a first user equipment determining subunit, configured to obtain, according to the first coupling identifier, a coupling identifier obtained by the subunit, and determine each UE corresponding to the S1 connection.

The base station according to claim 9, wherein the connection detecting unit comprises: a connection detecting subunit, configured to detect whether an S1 connection between the base station and the MME is incorrect; and a second connection confirming subunit, And when the connection detection subunit detects an S1 connection error with the MME, confirming that the S1 connection abnormality with the MME is abnormal.

The base station according to claim 12, wherein the user equipment determining unit comprises:

a second coupling identifier obtaining subunit, configured to obtain a coupling identifier of each UE on the S1 connection; And a second user equipment determining subunit, configured to obtain, according to the second coupling identifier, a coupling identifier obtained by the subunit, and determine each UE corresponding to the S1 connection.

The base station according to claim 9, wherein the tracking area update indication unit comprises:

a first message sending subunit, configured to send, to each UE determined by the user equipment determining unit, a radio resource control protocol RRC connection release message, where the RRC connection release message carries indication information indicating that the UE initiates the TAU;

The base station according to claim 14, wherein the selecting subunit comprises: a mobility management entity determining module, configured to determine an MME that the UE has registered;

a state determining module, configured to determine whether the S1 connection between the MME and the MME determined by the mobility management entity determining module is restored to a normal state;

a first selection module, configured to: when the determination result of the state determination module is yes, select an MME determined by the mobility management entity determining module to provide mobility management for the UE;

And a second selection module, configured to: when the determination result of the state determination module is negative, select another MME other than the MME determined by the mobility management entity determining module to provide mobility management for the UE.

The base station according to claim 15, wherein the mobility management entity determines that the module comprises:

a first mobility management entity determining submodule, configured to determine, according to the S-TMSI, an MME that the UE has registered, when the judgment result of the first determining submodule is YES;

a second determining sub-module, configured to determine, when the determining result of the first determining sub-module is no, whether the RRC connection setup complete message received by the second message receiving sub-unit carries an MME identifier;

And a second mobility management entity determining submodule, configured to determine, according to the MME identity, the MME that the UE has registered, when the judgment result of the second determining submodule is yes.

17. A user equipment, the user equipment comprising:

a connection release message receiving unit, configured to receive an RRC connection release message sent by the base station, where the RRC connection release message carries an indication message connection establishment request message sending unit, configured to instruct the user equipment UE to initiate a TAU, according to the RRC connection And releasing the indication information carried in the message, and sending an RRC connection setup request message to the base station;

a connection establishment message receiving unit, configured to receive an RRC connection setup message sent by the base station, and a connection establishing unit, configured to re-establish an RRC connection after receiving the RRC connection setup message;

And a connection establishment completion message sending unit, configured to send an RRC connection setup complete message to the base station after the RRC connection is successfully established, where the RRC connection setup complete message carries a TAU request message.