CN102917434A - Access control method and system under scene that home base station supports a plurality of cells - Google Patents

Abstract

The invention discloses an access control method under a scene that a home base station (HeNB) supports a plurality of cells; and the method comprises the following steps of: transmitting operator (PLMN) identifiers (ID), closed subscriber groups (CSG) ID and access mode information of the plurality of cells of the HeNB to a mobile management entity (MME); through the MME, judging the access situations of networked user equipment (UE) in different CSG ID cells of the HeNB according to the received PLMN ID, the CSG ID and the access mode information of the plurality of cells of the HeNB; and informing the HeNB of the access situation information; and controlling the accessing of the accessed UE according to the access situation information by the HeNB; and the invention further discloses an access control system under the scene that the HeNB supports the plurality of cells; and through the adoption of the scheme disclosed by the invention, the accessing of the UE can be controlled under the scene that the HeNB supports the plurality of cells, and signaling passing through a core network can be reduced, so that system resources are saved.

Description

Access control method and system under multi-cell supporting scene of home base station

Technical Field

The invention relates to an access control technology of a wireless communication system, in particular to an access control method and system under a scene that a home base station supports multiple cells.

Background

A Home base station (HeNB, Home eNB) is a small-sized and low-power base station, and is deployed in indoor places such as homes and offices. The main role of the HeNB is to provide higher traffic rates to the user and reduce the cost required to use high rate services, while making up for the lack of coverage of existing distributed cellular radio communication systems.

A schematic diagram of an HeNB network architecture in an LTE advanced Long Term Evolution (Long Term Evolution) system proposed by the Third Generation Partnership project (3 GPP) is shown in fig. 1. The core network element includes a Mobility Management Entity (MME) and a Serving Gateway (S-GW). The MME assumes mobility management related functions of a User Equipment (UE). The S-GW undertakes the data routing processing of the user plane, terminates the downlink data of the UE in an idle state, manages and stores the context of the evolution universal terrestrial Radio Access network (ERAB, E-UTRAN Radio Access Bearer) of the UE and the like. An Evolved Universal terrestrial radio Access Network (E-UTRAN) is composed of a HeNB and a HeNB GW (HeNB GW). The HeNB completes connection with the MME based on a core network interface protocol (such as S1-MME interface) defined in the standard, and accesses the UE based on an air interface protocol (such as S1-U interface) defined in the standard. To a large extent, the HeNB bears no difference in functionality from a common Macro base station (Macro eNB). Based on the requirement of network planning, in some deployment scenarios, a high-level management entity (HeMS) may be introduced between the HeNB and the MME, and the HeMS may undertake a part of HeNB management functions.

The HeNB configuration situation in the existing LTE system is that the HeNB only supports one physical cell, and the cell of the HeNB can work in three working modes of closed, mixed and open. For the closed and hybrid operating modes, a physical cell of the HeNB is configured with a Closed Subscriber Group (CSG) Identity (ID), and the CSG ID identity and its access mode are broadcasted in physical broadcast information of the cell, and the UE selects a suitable camping and handover cell based on a cell CSG configuration condition included in the broadcast information of the CSG cell and its own CSG access white list information. In addition, during the initial network access of the UE and the handover operation based on S1, the MME determines whether the UE can complete the network access and handover operation based on the CSG registration information of the UE stored in the core network. The existing system has more detailed description and specification for CSG-related initial network access and access control in a handover operation process when the HeNB works in a scenario that only one cell is supported.

With the continuous development of LTE systems, some operators have proposed a requirement that an HeNB supports multiple carriers and multiple cells, and when the HeNB supports multiple physical cells, there may be three configuration methods for CSG ID configuration of each cell. Here, a scenario in which an HeNB supports three cells is taken as an example, fig. 2 shows a first configuration method, carrier frequencies used by three cells (CCs) of the HeNB are f1, f2, and f3, respectively, and the system configures CSG IDs of three different cells supported by the system as CSG ID #1, CSG ID #2, and CSGID #3, respectively. Fig. 3 shows another configuration method, the carrier frequencies used by the three cells of the HeNB are also f1, f2, and f3, respectively, but the system configures the CSG IDs of the three different cells supported by the system as CSG ID # 1. The CSG ID configuration methods shown in fig. 2 and 3 have different application scenarios based on different requirements of operators. For the configuration method in fig. 3, the initial access control and the handover access control of the UE may directly use the procedures in the current system defined in the scenario supporting a single cell HeNB. In some scenarios, the operator may need to use different CSG configurations for different cells, so as to control different UEs to access to different cells in a classified manner, that is, the configuration shown in fig. 2 needs to be used. For the scenario shown in fig. 2 or the scenario in which a part of the cells supported by the HeNB are configured with the same CSG ID, and another part of the cells are configured with different CSG IDs, the procedure in the current system defined in the scenario supporting a single-cell HeNB cannot meet the requirements of UE initial access control and handover access control in the scenario in which the HeNB supports multiple different CSG ID cells.

Disclosure of Invention

In view of this, the main object of the present invention is to provide an access control method and system in a scenario that an HeNB supports multiple cells, which implement access control for a UE in a scenario that the HeNB supports multiple different CSG ID cells.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides an access control method under a scene that a HeNB supports multiple cells, which comprises the following steps:

sending operator (PLMN) IDs, CSG IDs and access mode information of a plurality of cells of the HeNB to an MME;

the MME judges the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB and informs the HeNB of the access condition information;

and the HeNB performs access control on the accessed UE according to the access condition information.

In the above solution, the sending PLMN IDs, CSG IDs, and access mode information of a plurality of cells of the HeNB to the MME is:

when a plurality of cells of an HeNB are configured with different CSG IDs, the HeNB uses the PLMN ID, the CSG ID and the corresponding access mode information of each cell to form a CSG information table, and the CSG information table is carried in a user equipment special message sent to an MME; or the CSG information table is carried in an S1 interface public message sent to the MME; the user equipment-specific message sent to the MME includes: the method comprises the steps of a user equipment initial network access request message, a switching request response message, a switching notification message, a path switching request message and a user equipment context updating request response message.

In the above solution, the MME determining the access situation of the UE accessing the network in different CSG ID cells of the HeNB is:

MME compares the PLMN ID, the CSG ID and the corresponding access mode information in the CSG information table with CSG registration information of UE which is executing network access operation in an entry form, wherein,

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is allowed to access;

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by membership;

and when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by non-membership.

In the above scheme, the notifying the HeNB of the access condition information is: the MME constructs a CSG access control judgment result table of the UE according to the judged access condition, and carries the CSG access control judgment result table of the UE through the special message of the user equipment sent to the HeNB; the user equipment specific message to the HeNB comprises: user equipment context establishment request message, handover request message, user equipment context update request message, path switch request response message.

In the above scheme, the method further comprises: the MME stores CSG information tables of the HeNBs; when the UE executes the switching operation, a target base station of the switching operation is an HeNB supporting multiple cells, the MME receives the switching requirement of a source base station and judges that the switching is allowed to execute, the MME judges the access condition of the UE executing the switching operation in different CSG ID cells of the target base station according to a stored CSG information table of the target base station, and the access condition forms a CSG access control judgment result table of the UE and is sent to the target base station of the switching operation through a switching request message.

In the above scheme, the access control of the HeNB on the accessed UE according to the access condition information is as follows: and the HeNB receives a user equipment dedicated message which is sent by an MME and carries a CSG access control judgment result table of the UE, establishes and stores a UE context based on the CSG access control judgment result table, and performs access control on the UE according to the UE context.

In the above scheme, the performing access control on the UE according to the UE context includes: when the UE is switched among a plurality of cells of the same HeNB, if a target cell and a source cell of switching operation are configured with different CSG IDs, the HeNB judges whether the UE can be switched to the target cell or not based on a CSG access control judgment result table of the UE included in the UE context.

In the above scheme, the method further comprises: and when the UE does not support the carrier aggregation function, the HeNB configures a measurement object of the UE based on a CSG access control decision result table of the UE, which is included in the UE context.

In the above scheme, the method further comprises: when the UE supports the carrier aggregation function, the HeNB determines a candidate auxiliary cell set allowing the UE to access based on a CSG access control decision result table of the UE included in a UE context, and completes the configuration of the carrier aggregation function of the UE based on a Radio Resource Control (RRC) connection reconfiguration message.

In the above scheme, the method further comprises: the HeNB and the neighbor HeNB interact with PLMN ID and CSG ID of each cell belonging to the HeNB, when the HeNB receives cell information belonging to the neighbor HeNB in a measurement report sent by UE, the HeNB judges a target cell of the neighbor HeNB allowing the UE to access based on a CSG access control decision table of the UE and the PLMN ID and the CSG ID of each cell of the neighbor HeNB contained in the context of the UE, and switches the UE to the target cell of the neighbor HeNB.

In the above scheme, the method further comprises:

before the HeNB receives a measurement report sent by the UE and contains cell information belonging to a neighbor HeNB, the HeNB configures a measurement object of the UE for the neighbor HeNB based on the UE context and PLMN ID and CSGID of each cell of the neighbor HeNB.

The invention provides an access control system under a scene that a HeNB supports multiple cells, which comprises: HeNB and MME; wherein,

the HeNB is used for sending the PLMN ID, the CSG ID and the access mode information of the plurality of cells of the HeNB to the MME; performing access control on the UE according to the access condition information of the UE which is sent by the MME and accesses the network in different CSG ID cells;

and the MME is used for judging the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSG ID and access mode information of the plurality of cells of the HeNB and informing the access condition information to the HeNB.

In the above solution, the HeNB is specifically configured to use the PLMN ID and the CSG ID of each cell belonging to the HeNB and the corresponding access mode information to form a CSG information table; the CSG information table is carried in a user equipment special message sent to an MME; or the CSG information table is carried in an S1 interface public message sent to the MME.

In the foregoing solution, the MME is specifically configured to compare the PLMN ID and the CSG ID of each entry in the CSG information table and the corresponding access mode information with CSG registration information of a UE that is performing a network access operation in an entry form, where:

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is allowed to access;

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by membership;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by a non-member identity;

and constructing a CSG access control judgment result table of the UE according to the judged access condition, and carrying the CSG access control judgment result table by the special message of the user equipment sent to the HeNB.

The invention provides an access control method and system under a scene that a HeNB supports multiple cells, wherein PLMN IDs, CSG IDs and access mode indication information of the multiple cells of the HeNB are sent to an MME; the MME judges the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSG ID and access mode information of a plurality of cells of the HeNB and informs the HeNB of the access condition information; the HeNB performs access control on the accessed UE according to the access condition information; therefore, under the scene that the HeNB supports a plurality of cells, the access control of the UE can be realized, the signaling overhead of interaction between the HeNB and the MME can be reduced, and the resources are saved.

Drawings

Fig. 1 is a schematic diagram of a HeNB network architecture in an LTE system in the prior art;

fig. 2 is a schematic diagram illustrating CSG ID configuration of each cell in an HeNB supporting multiple cells in the prior art;

fig. 3 is a schematic diagram illustrating CSG ID configuration of each cell in another HeNB supporting multiple cells in the prior art;

fig. 4 is a flowchart illustrating an access control method in a scenario where a HeNB supports multiple cells according to the present invention;

fig. 5 is a schematic diagram of a successful operation flow of UE initial network access in a scenario where a HeNB supports multiple cells according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for implementing access control by interacting cell configuration information between henbs in a scenario supporting multiple cells in the fifth embodiment of the present invention.

Detailed Description

The basic idea of the invention is: sending PLMN IDs, CSG IDs and access mode information of a plurality of cells of the HeNB to an MME; the MME judges the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSGID and access mode information of a plurality of cells of the HeNB and informs the HeNB of the access condition information; and the HeNB performs access control on the accessed UE according to the access condition information.

The invention is further described in detail below with reference to the figures and the specific embodiments.

The invention realizes an access control method under the situation that a HeNB supports multiple cells, as shown in figure 4, the method comprises the following steps:

step 101: sending PLMN IDs, CSG IDs and access mode information of a plurality of cells of the HeNB to an MME;

specifically, when a plurality of cells of an HeNB are configured with different CSG IDs, the HeNB uses the PLMN IDs and CSG IDs configured for each cell and corresponding access mode information to construct a CSG information table in an entry form, and the CSG information table stores the PLMN IDs and CSG IDs configured for each cell of the HeNB and the access mode information. When the HeNB is connected to the MME through the HeNB GW in the process that the UE accesses the network through the HeNB, the HeNB carries the CSG information table in the user equipment dedicated message sent to the MME; when the HeNB is not connected to the MME through the HeNB GW, the HeNB may carry the CSG information table in an S1 interface common message sent to the MME;

the CSG information table stores access mode information, which generally includes: an access mode field corresponding to the CSG ID of the hybrid working mode cell in the CSG information table is hybrid working mode indication information, and an access mode field corresponding to the CSG ID of the closed working mode cell is closed working mode indication information; wherein, the access mode field corresponding to the CSG ID of the closed operating mode cell generally does not fill indication information representing the closed operating mode;

the UE-specific message sent to the MME includes: the method comprises the steps that user equipment initial network access request information, switching request response information, switching notification information, path switching request information, UE access control special information under a newly added scenario supporting a multi-cell HeNB, and user equipment context updating request response information are obtained;

the S1 interface common message includes: s1 connection establishment message, HeNB configuration update message, and UE access control common message under the newly added scenario supporting multi-cell HeNB.

Step 102: the MME judges the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSG ID and access mode information of a plurality of cells of the HeNB and informs the HeNB of the access condition information;

specifically, the MME compares the received PLMN IDs and CSG IDs of the multiple cells of the HeNB with CSG registration information of the UE that is performing an access operation in an entry form, where when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are included in the CSG registration information of the UE, it determines that an access condition of the entry corresponding to the closed working mode indication information is to allow the UE to access;

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by member (member) identity;

when the PLMN ID and the CSG ID corresponding to the hybrid operating mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid operating mode indication information is that the UE is allowed to access by a non-member (non-member) identity; and the MME constructs a CSG access control judgment result table of the UE according to the judged access condition and carries the CSG access control judgment result table by the special message of the user equipment sent to the HeNB.

The user equipment dedicated message addressed to the HeNB includes: the method comprises a user equipment context establishing request message, a switching request message, a user equipment context updating request message, a path switching request response message and a newly added special message for establishing UE context at a position supporting a multi-cell HeNB.

Further, the MME stores CSG information tables of the HeNBs; when the UE executes the switching operation, a target base station of the switching operation is an HeNB supporting multiple cells, the MME receives the switching requirement of a source base station and judges whether the switching is allowed to execute, the MME judges the access condition of the UE executing the switching operation in different CSG ID cells of the target base station according to a stored CSG information table of the target base station, and the access condition forms a judgment result table of CSG access control of the UE and is sent to the target base station of the switching operation through a switching request message; when the MME judges that the switching is not allowed to be executed, the MME judges the access condition of UE executing the switching operation in different CSGID cells of the target base station according to the stored CSG information table of the target base station, the access condition forms a CSG access control judgment result table of the UE, and the CSG access control judgment result table is sent to a source base station of the switching operation through a switching preparation failure message;

further, when the target base station receives a handover request message which does not include the decision result table, indicating that the MME does not store the CSG information table of the target base station, the target base station sends the PLMN IDs, CSG IDs, and access mode information of the cells to which the target base station belongs to the MME through a handover request response or a handover notification message; the MME stores PLMN IDs, CSG IDs and access mode information of a plurality of cells of a target base station, judges the access conditions of UE executing switching operation in different CSG ID cells of the target base station, forms a CSG access control judgment result table of the UE with the access conditions, and sends the CSG access control judgment result table to the target base station of the switching operation through a special message of user equipment.

Step 103: the HeNB performs access control on the accessed UE according to the access condition information;

specifically, the HeNB receives a user equipment dedicated message which is sent by an MME and carries a CSG access control decision result table of the UE, establishes and stores a UE context based on the CSG access control decision result table, namely the UE context comprises the CSG access control decision result table of the UE, and performs access control on the UE according to the UE context;

the performing access control on the UE according to the UE context generally includes: when the UE is switched among a plurality of cells of the same HeNB, if a target cell and a source cell of switching operation are configured with different CSG IDs, the HeNB judges whether the UE can be switched to the target cell or not based on a CSG access control judgment result table of the UE included in the UE context.

The method further comprises the following steps: and when the UE does not support the carrier aggregation function, the HeNB configures a measurement object of the UE based on a CSG access control decision result table of the UE included in the UE context.

The method further comprises the following steps: when the UE supports the carrier aggregation function, the HeNB determines a candidate Secondary Cell (SCell) set allowing the UE to access based on a CSG access control decision result table of the UE included in the UE context, and completes the configuration of the carrier aggregation function of the UE based on an RRC connection reconfiguration message.

The method further comprises the following steps: when the HeNB is used as a source HeNB for UE to execute switching operation, the HeNB acquires a cell of a target base station which can be switched by the UE and a cell of a target base station which cannot be switched by the UE according to a CSG access control judgment result table of the UE under the target base station; and adding the carrier frequency and the physical cell identification of the cell of the target base station which can not be switched to a black list of a measurement object of the UE.

The method also comprises the following steps: when CSG registration information of UE changes or CSG configuration of HeNB supporting a plurality of different CSG ID cells changes, the MME judges whether the changed information influences the UE which is accessed to the network based on the HeNB, if so, the MME reconstructs a CSG access control judgment result table of the UE, and updates the CSG access control judgment result table of the UE in the context of the UE stored at the HeNB through the special information of the user equipment; here, the user equipment specific message includes: a user equipment context update request message or a newly added dedicated message for updating the UE context at the supporting multi-cell HeNB.

Further, for the UE supporting the carrier aggregation function, if there is a part of scells already serving this type of UE and the UE cannot be served any more due to a change in CSG registration information of the UE, the HeNB centrally deletes the corresponding cell in the SCell of the UE based on the RRC connection reconfiguration operation.

The updated CSG access control decision result table of the UE may further provide a reference for subsequent secondary cell addition/deletion and X2 handover operation decision.

In order to implement the method, the invention also provides an access control system under the situation that the HeNB supports multiple cells, and the system comprises: HeNB and MME; wherein,

the HeNB is used for sending the PLMN ID, the CSG ID and the access mode information of a plurality of cells belonging to the HeNB to the MME; performing access control on the UE according to the access condition information of the UE which is sent by the MME and accesses the network in different CSG ID cells;

the MME is used for judging the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSG ID and access mode information of the plurality of cells of the HeNB and informing the access condition information to the HeNB;

the HeNB is specifically configured to construct a CSG information table in an entry form by using the configured PLMN ID, CSGID and corresponding access mode information of each cell belonging to the HeNB; when the HeNB is connected to the MME through the HeNB GW in the process that the UE is accessed to the HeNB, the CSG information table is carried in the user equipment special message sent to the MME; or when the HeNB is not connected to the MME through the HeNB GW, the CSG information table is carried in an S1 interface public message sent to the MME;

the MME is specifically configured to compare the received PLMN IDs and CSG IDs of multiple cells of the HeNB with CSG registration information of the UE that is performing an access operation in an entry form, where when the PLMN ID and the CSG ID corresponding to closed working mode indication information are included in the CSG registration information of the UE, it determines that an access condition of the entry corresponding to the closed working mode indication information is that the UE is allowed to access; when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access; when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by membership; when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by a non-member identity; and constructing a CSG access control judgment result table of the UE according to the judged access condition, and carrying the CSG access control judgment result table by the special message of the user equipment sent to the HeNB.

Further, the MME is further configured to store a CSG information table of each HeNB; when UE executes switching operation, a target base station of the switching operation is an HeNB supporting multiple cells, the MME receives the switching requirement of a source base station and judges whether the switching is allowed to execute, the access condition of the UE executing the switching operation in different CSG ID cells of the target base station is judged according to a stored CSG information table of the target base station, the access condition forms a CSG access control judgment result table of the UE, and the CSG access control judgment result table is sent to the target base station of the switching operation through a switching request message; the MME judges whether the switching is allowed to be executed or not, judges the access condition of UE executing the switching operation in different CSG ID cells of the target base station according to the stored CSG information table of the target base station, forms a CSG access control judgment result table of the UE according to the access condition, and sends the CSG access control judgment result table to a source base station of the switching operation through a switching preparation failure message;

the HeNB is specifically further configured to receive a UE-specific message which is sent by an MME and carries a CSG access control decision result table of the UE, establish and store a UE context based on the CSG access control decision result table, and perform access control on the UE according to the UE context.

The HeNB is specifically configured to transmit the PLMN ID and the CSGID configured for each cell belonging to the HeNB to the neighbor base station to assist a subsequent handover operation type decision operation.

The HeNB is specifically further configured to determine, based on the UE context, whether the UE may be handed over to a target cell of another HeNB based on the X2 handover operation procedure.

The following detailed description of the implementation and principles of the method of the present invention is provided in connection with specific embodiments.

Example 1

This embodiment describes a successful initial network access procedure of a UE in a HeNB scenario supporting multiple different CSG ID cells.

In this embodiment, a plurality of cells of an HeNB are configured with different CSG IDs in a scenario, and an access control method in which the HeNB supports a multi-cell scenario is implemented, as shown in fig. 5, the method includes the following steps:

step 201: the UE and the cell contained in the HeNB complete RRC connection establishment;

step 202: the UE sends an RRC connection establishment completion message to the HeNB;

step 203: after receiving an RRC connection establishment completion message sent by UE, the HeNB uses the configured PLMN ID, CSG ID and corresponding access mode of each cell belonging to the HeNB to form a CSG information table;

specifically, after receiving the RRC connection setup complete message sent by the UE, the HeNB uses the configured PLMN ID and CSG ID of each cell belonging to the HeNB and the corresponding access mode to form a CSG information table, and it should be understood that any data structure that may include the configured PLMN ID and CSG ID of each cell of the HeNB and the access mode thereof may be used. For convenience of description, each entry in the CSG information table may be as shown in table 1, and it should be understood that table 1 herein is merely an example for convenience of description and does not exclude any data structure that reflects the same information as table 1 in other forms; table 1 shows a CSG information table construction method for saving system resource overhead: if the configured PLMN ID and CSG ID of two or more cells are the same, the cells of the type correspond to the same entry in a CSG information table; each entry in table 1 includes a CSG ID, and a PLMN ID and Access Mode information (Access Mode) corresponding to each CSG ID, where the CSG ID is a necessary carrying (directory) field in each entry in the CSG information table, the PLMN ID is an Optional carrying (Optional) field in each entry in the CSG information table, and the Access Mode information is an Optional field in each entry in the CSG information table. Wherein the type of the CSG ID is a BIT STRING (BIT STRING) with a length of 27; the type of PLMN ID is byte STRING of length 3 (OCTET STRING); when the PLMN ID of the cell corresponding to the CSG ID appears in or can be derived from other cells (IE), the PLMN ID of the cell corresponding to the CSG ID does not need to appear in the entry corresponding to the CSG ID; for example, in the existing system flow, an Initial user Message (Initial UE Message) carries a tracking Area Identifier (TAI, Track Area Identifier) or a serving cell Identifier (E-CGI, E-UTRAN cell global Identifier), where the TAI or ECGI cell includes a PLMN ID, and when the PLMN ID corresponding to the CSG ID is the same as the PLMN ID included in the TAI or ECGI cell, the PLMN ID is not added to the entry corresponding to the CSG ID included in the CSG information table. It should be understood that the PLMN ID carrying processing mechanism herein is only an implementation manner that further considers saving system resource overhead, and any other processing manner that may include the PLMN ID corresponding to the CSG ID in each entry in the CSG aggregation information table may be taken as an implementation manner, for example, each entry in the CSG information table may include the PLMN ID corresponding to the CSG ID. The type of the access mode information corresponding to the CSG ID is ENUMERATED (estimated), where an access mode field corresponding to the CSG ID may be null as the indication information of the closed working mode when the access mode corresponding to the CSG ID is the closed working mode, and a value of the access mode field corresponding to the CSG ID is hybrid as the indication information of the hybrid working mode when the access mode corresponding to the CSG ID is the hybrid working mode.

The method further comprises the following steps: in order to save the system signaling overhead, the first entry in the CSG information table may be corresponding to the serving cell of the UE currently completing the RRC connection by default. It should be understood that other methods for the MME to determine the serving cell of the UE currently completing the RRC connection after receiving the CSG information table may be used, for example, a new field is added after an entry of the CSG information table to identify that the entry corresponds to the current serving cell of the UE.

TABLE 1

Step 204: the HeNB constructs and sends an initial user message to the MME based on part of NAS related information contained in the RRC connection establishment completion message, wherein the CSG information table is carried in the initial user message;

step 205: after receiving the initial user message, the MME executes access control judgment operation based on CSG registration information of UE executing network access operation; the MME constructs a CSG access control judgment result table of the UE according to the judged access condition;

specifically, after receiving the initial user message, the MME compares an entry in a CSG information table carried by the initial user message with CSG registration information of the UE that is performing an access operation, where different operations need to be performed for different forms of the entry in the CSG information table, and when the entry includes a CSGID and a PLMN ID, a PLMN ID and the CSG ID of the entry form a combined identifier to match the CSG registration information of the UE; when the entry only contains the CSG ID and does not contain the PLMN ID, acquiring the PLMN ID corresponding to the CSG ID, for example, the PLMN ID contained in the TAI or ECGI, based on the PLMN ID contained in the other cell or the PLMN ID derived from the other cell, and forming a combined identifier to match the CSG registration information of the UE;

when a combined identifier formed by a CSG ID and a PLMN ID corresponding to the closed working mode indication information is contained in CSG registration information of the UE, judging that the access condition of a corresponding entry of the closed working mode indication information is that the UE is allowed to access; when the combined identification formed by the CSG ID and the PLMNID corresponding to the closed working mode indication information is not contained in the CSG registration information of the UE, judging that the access condition of the item of the closed working mode indication information is that the UE is not allowed to access; when a combined identifier formed by a CSG ID and a PLMN ID corresponding to the hybrid operating mode indication information is contained in CSG registration information of the UE, judging that the access condition of an entry of the hybrid operating mode indication information is that the UE is allowed to access by membership; and when the combined identifier formed by the CSG ID and the PLMN ID corresponding to the hybrid operating mode indication information is not contained in the CSG registration information of the UE, judging that the access condition of the entry of the hybrid operating mode indication information is that the UE is allowed to access in a non-membership way.

The MME constructs a CSG access control decision result table of the UE according to the judged access situation, wherein the CSG access control decision result table is shown in table 2, when the table 1 contains an entry of which an access mode field is indication information of a closed working mode and the UE access situation corresponding to the entry is that the UE is allowed to access, the entry needs to have a corresponding entry in the table 2, the CSG ID of the entry needs to be contained in the corresponding entry in the table 2, and if the entry has a PLMN ID in the table 1, the corresponding PLMN ID needs to be contained in the corresponding entry in the table 2; when the table 1 includes an entry whose access mode field is the hybrid operating mode indication information, the entry also needs to have a corresponding entry in the table 2, and the corresponding entry in the table 2 needs to include the corresponding CSG ID in the table 1, the PLMN ID carried by the entry in the table 1 also needs to be included in the corresponding entry in the table 2, and the CSG member status field (CSGmembership status) of the corresponding entry in the table 2 fills the access identity information of the cell whose access mode is the hybrid mode and the UE corresponds to the CSG ID included in the entry.

The MME can confirm the corresponding entry of the current service cell accessed by the UE based on the CSG access control judgment result table, and when the service cell of the UE completing the RRC connection is in a closed working mode, the UE may not access the network based on the service cell completing the RRC connection; when the serving cell in which the UE completes the RRC connection is in the hybrid working mode, the UE accesses the network through the serving cell in which the RRC connection is completed with different membership identities. In this embodiment, the MME determines that the UE can access the network through the serving cell that completes the RRC connection.

TABLE 2

Step 206: the MME sends the CSG access control judgment result table of the UE to the HeNB, and the HeNB establishes a UE context;

specifically, the MME encapsulates the CSG access control decision result table of the UE in a UE Initial Context Setup Request message (Initial Context Setup Request), and sends the information to the HeNB to which the UE accesses; and after receiving an initial context establishment request message which is sent by an MME and contains the CSG access control judgment result table, the HeNB establishes a UE context based on the content in the message, wherein the UE context comprises the CSG access control judgment result table of the UE.

Step 207: and the HeNB performs access control, measurement configuration operation and measurement configuration operation of the UE carrier aggregation function of the UE subsequent switching based on the UE context.

When the UE is switched among a plurality of cells of the HeNB, if a target cell and a source cell of the switching operation are configured to different CSG IDs, the HeNB can judge whether the UE can be switched to the target cell or not based on the UE context stored by the HeNB.

When the UE performing network access operation does not support the carrier aggregation function, the HeNB configures a measurement object of the UE based on the judgment result table included in the UE context after the UE successfully accesses the network and establishes the UE context;

specifically, the HeNB may add, based on the decision result table included in the UE context, the carrier frequency and the cell physical identity of the cell corresponding to the CSG ID that the UE is not allowed to access to the measurement black table of the UE through RRC reconfiguration operation, thereby preventing the UE from measuring the cell that is not allowed to access; the HeNB may also further determine whether the measurement configuration of the UE for all carrier frequencies that can access the cell has been configured based on the decision result table included in the UE context, and if not, complete the measurement configuration of the UE for the carrier frequencies of the cell based on RRC reconfiguration operation, thereby optimizing subsequent measurement and related operations.

When the UE supports the carrier aggregation function, the HeNB determines a candidate SCell set allowing the UE to access based on the decision result table included in the UE context, and completes the configuration of the carrier aggregation function of the UE based on an RRC connection reconfiguration message;

specifically, when the UE performing the network access operation supports the carrier aggregation function, the HeNB selects a candidate SCell set based on a parameter required to support the UE carrier aggregation function reported by the UE, and determines whether the UE can access the candidate SCell based on the stored decision result table included in the UE context, or screens out the scells that the UE is not allowed to access by referring to the decision result table included in the UE context when the candidate SCell set is selected. And when the HeNB selects the SCell set, completing the configuration of the carrier aggregation function of the UE based on the RRC connection reconfiguration message. Compared with the existing flow, the flow provided by the embodiment simplifies the interaction operation between the HeNB and the MME, thereby achieving the effects of reducing signaling overhead and simplifying operation.

Example 2

This embodiment describes an initial network access failure procedure of a UE in a HeNB scenario supporting multiple different CSG ID cells.

In this embodiment, a plurality of cells of the HeNB are configured with different CSG IDs, and after receiving an RRC connection setup complete message sent by the UE, the HeNB uses the PLMN ID, the CSG ID, and the corresponding access mode of each cell to form a CSG information table, where each entry in the CSG information table is shown in table 1, and the specific description of table 1 is described in embodiment 1.

The HeNB constructs and sends an initial user message to the MME based on part of NAS related information contained in the RRC connection establishment completion message, wherein the CSG information table is carried in the initial user message; after receiving the initial user message in the CSG information table, the MME performs an access control decision operation based on the CSG registration information of the UE that is performing the network access operation, where the specific access control decision operation is as described in embodiment 1; and the MME constructs a CSG access control judgment result table of the UE according to the judged access condition, and sends the CSG access control judgment result table to the HeNB accessed by the UE after judging that the UE is not allowed to be accessed to the current service cell. And the HeNB receives the message which is sent by the MME and contains the CSG access control judgment result table, and executes RRC connection reconfiguration operation based on the UE access condition contained in the CSG access control judgment result table of the UE after knowing that the UE can not access the current service cell.

When the UE performing the network access operation does not support the carrier aggregation function, the HeNB may add, based on the access condition of the UE included in the decision result table, the carrier frequency and the cell physical identity of the cell corresponding to the CSG ID that the UE is not allowed to access to the measurement black table of the UE through an RRC reconfiguration operation, thereby preventing the UE from measuring the cell that cannot be accessed. After the initial network access operation of the UE is unsuccessful, the HeNB further needs to Release the RRC link of the UE, that is, the HeNB sends a radio link Release message (RRCConnection Release) to the UE. Further, the HeNB may include a carrier frequency and a cell physical identifier of a cell corresponding to a CSG ID that the UE cannot access in a radio link release message to transmit to the UE, and after receiving the radio link release message, the UE may add the carrier frequency and the cell physical identifier of the cell corresponding to the CSG ID that the UE cannot access, which are included in the message, to a cell measurement black table of the UE, in addition to releasing a corresponding RRC connection, thereby preventing the UE from measuring the cell that cannot be accessed. And transmitting the carrier frequency of the cell corresponding to the CSG ID which can not be accessed by the UE and the physical identifier of the cell to the UE through the wireless link release message, so that the signaling overhead of an air interface can be saved, and the system performance is improved. The HeNB can also judge whether the measurement configuration of the UE for the carrier frequencies of all the accessible cells is configured or not based on the access condition of the UE, and if not, the measurement configuration of the UE for the carrier frequencies of the cell is completed based on RRC reconfiguration operation, so that the subsequent measurement and related operation are optimized.

When the UE executing the network access operation supports the carrier aggregation function, the HeNB determines a candidate SCell set allowing the UE to access based on the decision result table, and completes the configuration of the carrier aggregation function of the UE based on the RRC connection reconfiguration message;

the procedures, which are not described in this embodiment, required for the UE to initially access the network and to be rejected are prior art and are not described herein again.

Example 3

This embodiment describes an access decision operation of the UE during handover when a target base station of the handover operation is an HeNB supporting multiple cells with different CSG IDs.

In this embodiment, the target base station for handover operation is an HeNB supporting multiple cells, the MME already stores PLMN IDs, CSG IDs, and access mode information of the multiple cells of the target HeNB, and different CSG IDs and access mode information of the multiple cells of the target HeNB may be sent to the MME by the target HeNB and stored by the MME during an initial network access operation process by a UE connected to the target HeNB. The method comprises the steps that an MME (mobility management entity) receives a Handover demand message (Handover Required) sent by a source base station and judges whether Handover operation is allowed to be executed, the access situation of UE (user equipment) executing the Handover operation in different CSG ID cells of a target base station is judged according to stored different CSG IDs (closed subscriber group identities) and access mode information of a plurality of cells of the target base station, a CSG access control judgment result table of the UE shown in table 2 in embodiment 1 is constructed, and the MME sends the CSG access control judgment result table to the target base station executing the Handover operation through a Handover Request message; the target HeNB may include the received CSG access control decision result table in a UE context created and stored for the UE, and perform the UE measurement configuration operation, the access control operation when the UE switches between cells of the target HeNB, and the secondary cell configuration operation supporting the carrier aggregation UE, which are described in embodiment 1, based on the CSG access control decision result table stored in the UE context.

In this embodiment, if the MME does not store different CSG IDs and access mode information of multiple cells of the target HeNB when the MME receives the handover request message sent by the source base station, the MME does not include the CSG access control decision result table of the UE in the handover request message sent to the target HeNB; after receiving a Handover Request message that does not include the CSG access control decision result table of the UE, the target HeNB constructs a CSG information table as described in embodiment 1 based on the CSG ID of each cell and the corresponding access mode, and sends the CSG information table, which is carried by a Handover Request response (ACK) message or a Handover notification (Handover Notify) message, to the MME. After receiving the CSG information table sent by the target HeNB, the MME constructs a CSG access control decision result table of the UE as shown in table 2 in embodiment 1, and sends the CSG access control decision result table to the target HeNB through a UE-specific message, which may be but is not limited to a UE context change request message; after receiving the user equipment dedicated message containing the CSG access control decision result table of the UE, the target HeNB creates or updates the CSG access control decision result table of the UE in the context of the UE; the target HeNB performs the measurement configuration operation of the UE, the access control operation of the UE during the inter-cell handover of the UE in embodiment 1, and the secondary cell configuration operation of the UE supporting carrier aggregation based on the CSG access control decision result table stored in the context of the UE.

Further, the UE context may also provide a decision basis for the target HeNB to subsequently determine whether the UE may be handed over to another target base station based on the X2 handover operation procedure.

Example 4

This embodiment describes an operation in which a handover request of a UE is rejected when a target base station of a handover operation is an HeNB supporting a plurality of cells.

In this embodiment, after the MME receives the Handover requirement message sent by the source base station, and the MME determines that the Handover operation is not allowed to be performed, the MME replies a Handover Required Failure (Handover Required Failure) message to the source base station initiated by the Handover, where the Handover Required Failure message carries a CSG access control decision result table for the UE of the target HeNB, and a method for creating the CSG access control decision result table for the UE of the target HeNB is the same as the method in embodiment 3, and is not described here again.

After receiving the CSG access control decision result table of the UE of the target HeNB, the source base station acquires the cell of the CSG ID which can not be accessed by the UE, and adds the carrier frequency and the physical cell identification of the cell into the UE measurement black table, thereby optimizing the subsequent measurement and the network access related operation.

If the handover preparation failure message sent by the MME does not carry the CSG access control decision table of the UE, and the source base station has already learned the CSG ID and access mode information corresponding to each cell of the target HeNB in the process of establishing the X2 interface with the target HeNB, the source base station determines the cell of the target HeNB that is not allowed to be accessed by the UE according to the learned CSG ID and access mode information corresponding to each cell of the target HeNB, and adds the carrier frequency and physical cell identifier of the cell to the UE measurement black table, thereby optimizing subsequent measurement and network access related operations.

Example 5

This embodiment describes an operation of transmitting configuration information of each cell between henbs in a scenario supporting multiple cells, and an access control method for an HeNB in a scenario supporting multiple cells is implemented, where as shown in fig. 6, the method includes the following steps:

step 301: the PLMN ID and the CSG ID belonging to each cell of the HeNB1 and the HeNB2 are interacted based on an X2 interface;

specifically, in the process of establishing the X2 interface, the PLMN ID and the CSG ID configured for each cell belonging to the HeNB1 and the HeNB2 are mutually transmitted, and the available messages include: an X2 interface establishment message (X2 Setup Request), an X2 interface establishment Response message (X2 Setup Response);

when the CSG configuration information of each cell of the HeNB1 or the HeNB2 changes, the PLMN ID and the CSG ID interacted before are mutually updated between the HeNB1 and the HeNB2, where the messages that can be used include: eNB Configuration Update message (eNB Configuration Update).

Step 302: when the UE is connected with a network based on the HeNB1, the HeNB1 establishes a UE context based on a CSG access control decision result table of the UE sent by an MME, wherein the UE context comprises the CSG access control decision table of the UE;

in this step, the operation of the UE for connecting to the network based on the HeNB1 is as described in embodiment 1, and specific operation steps are not described again.

Step 303: the HeNB1 configures a measurement object of the UE for the HeNB2 based on the UE context and the PLMN ID and CSGID of each cell of the HeNB 2;

specifically, the HeNB1 determines, based on the CSG access control decision table of the UE and the PLMN ID and CSG ID of each cell of the HeNB2 included in the UE context, whether to already configure measurement configuration of the UE for the carrier frequency of the cell which belongs to the HeNB2 and allows the UE to access, and if not, completes measurement configuration of the carrier frequency of the UE for the cell based on RRC reconfiguration operation;

the HeNB1 further adds the carrier frequency and the cell physical identity of the cell belonging to the HeNB2 and corresponding to the CSG ID that the UE is not allowed to access to, to the measurement black list of the UE through RRC reconfiguration operation based on the CSG access control decision table of the UE included in the UE context, thereby preventing the UE from measuring the cell that cannot be accessed.

Step 304: when the HeNB1 receives a measurement report sent by UE and contains cell information belonging to the HeNB2, the HeNB1 judges a target cell of the HeNB2 allowing the UE to access based on a CSG access control decision table of the UE contained in the UE context and PLMN ID and CSG ID of each cell of the HeNB 2;

the method further comprises the following steps: after the target cell of the HeNB2 allowing the UE to access is judged, whether the UE can be switched to the target cell based on the X2 interface is judged according to whether the CSG ID of the current access cell of the UE is the same as the CSG ID of the target cell allowing the UE to access, and if the CSG ID of the current access cell of the UE is the same as the CSG ID of the target cell allowing the UE to access, the UE can be switched to the target cell based on the switching operation flow of the X2 interface;

in this step, when the target cell operates in the hybrid operating mode, the HeNB1 obtains the identity information of the UE accessing the target cell based on the CSG access control decision table of the UE included in the UE context.

Step 305: the HeNB1 sends a handover request message to the HeNB2 so as to execute the operation flow of the UE to be handed over to the target cell of the HeNB 2;

further, when the target cell operates in the hybrid operation mode, the HeNB1 includes the identity information of the UE accessing the target cell in the handover request message sent to the HeNB 2.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (14)

1. An access control method under a multi-cell scenario supported by a home evolved node B (HeNB), the method comprising:

sending operator (PLMN) Identities (IDs), Closed Subscriber Group (CSG) IDs and access mode information of a plurality of cells of the HeNB to a Mobility Management Entity (MME);

the MME judges the access condition of the User Equipment (UE) which is accessed to the network in different CSG ID cells of the HeNB, and informs the HeNB of the access condition information;

and the HeNB performs access control on the accessed UE according to the access condition information.

2. The access control method according to claim 1, wherein the sending the PLMN IDs, CSG IDs, and access mode information of the plurality of cells of the HeNB to the MME is:

when a plurality of cells of an HeNB are configured with different CSG IDs, the HeNB uses the PLMN ID, the CSG ID and the corresponding access mode information of each cell to form a CSG information table, and the CSG information table is carried in a user equipment special message sent to an MME; or the CSG information table is carried in an S1 interface public message sent to the MME; the user equipment-specific message sent to the MME includes: the method comprises the steps of a user equipment initial network access request message, a switching request response message, a switching notification message, a path switching request message and a user equipment context updating request response message.

3. The access control method according to claim 2, wherein the MME determines the access situation of the UE to the network in different CSG ID cells of the HeNB, and includes:

MME compares the PLMN ID, the CSG ID and the corresponding access mode information in the CSG information table with CSG registration information of UE which is executing network access operation in an entry form, wherein,

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is allowed to access;

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by membership;

and when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by non-membership.

4. The access control method according to claim 3, wherein the informing the HeNB of the access situation information comprises: the MME constructs a CSG access control judgment result table of the UE according to the judged access condition, and carries the CSG access control judgment result table of the UE through the special message of the user equipment sent to the HeNB; the user equipment specific message to the HeNB comprises: user equipment context establishment request message, handover request message, user equipment context update request message, path switch request response message.

5. The access control method of claim 4, further comprising: the MME stores CSG information tables of the HeNBs; when the UE executes the switching operation, a target base station of the switching operation is an HeNB supporting multiple cells, the MME receives the switching requirement of a source base station and judges that the switching is allowed to execute, the MME judges the access condition of the UE executing the switching operation in different CSG ID cells of the target base station according to a stored CSG information table of the target base station, and the access condition forms a CSG access control judgment result table of the UE and is sent to the target base station of the switching operation through a switching request message.

6. The access control method according to claim 5, wherein the access control of the HeNB to the accessed UE according to the access situation information comprises: and the HeNB receives a user equipment dedicated message which is sent by an MME and carries a CSG access control judgment result table of the UE, establishes and stores a UE context based on the CSG access control judgment result table, and performs access control on the UE according to the UE context.

7. The access control method according to claim 6, wherein the access control for the UE according to the UE context is: when the UE is switched among a plurality of cells of the same HeNB, if a target cell and a source cell of switching operation are configured with different CSG IDs, the HeNB judges whether the UE can be switched to the target cell or not based on a CSG access control judgment result table of the UE included in the UE context.

8. The access control method of claim 7, further comprising: and when the UE does not support the carrier aggregation function, the HeNB configures a measurement object of the UE based on a CSG access control decision result table of the UE, which is included in the UE context.

9. The access control method of claim 7, further comprising: when the UE supports the carrier aggregation function, the HeNB determines a candidate auxiliary cell set allowing the UE to access based on a CSG access control decision result table of the UE included in a UE context, and completes the configuration of the carrier aggregation function of the UE based on a Radio Resource Control (RRC) connection reconfiguration message.

10. The access control method of claim 6, further comprising: the HeNB and the neighbor HeNB interact with PLMN ID and CSG ID of each cell belonging to the HeNB, when the HeNB receives cell information belonging to the neighbor HeNB in a measurement report sent by UE, the HeNB judges a target cell of the neighbor HeNB allowing the UE to access based on a CSG access control decision table of the UE and the PLMN ID and the CSG ID of each cell of the neighbor HeNB contained in the context of the UE, and switches the UE to the target cell of the neighbor HeNB.

11. The access control method of claim 10, further comprising:

before the HeNB receives a measurement report sent by the UE and contains cell information belonging to a neighbor HeNB, the HeNB configures a measurement object of the UE for the neighbor HeNB based on the UE context and PLMN ID and CSGID of each cell of the neighbor HeNB.

12. An access control system under a scenario that a HeNB supports multiple cells is characterized in that the system comprises: HeNB and MME; wherein,

the HeNB is used for sending the PLMN ID, the CSG ID and the access mode information of the plurality of cells of the HeNB to the MME; performing access control on the UE according to the access condition information of the UE which is sent by the MME and accesses the network in different CSG ID cells;

and the MME is used for judging the access condition of the UE which is accessed to the network in different CSG ID cells of the HeNB according to the received PLMN ID, CSG ID and access mode information of the plurality of cells of the HeNB and informing the access condition information to the HeNB.

13. The access control system according to claim 12, wherein the HeNB is specifically configured to construct a CSG information table using PLMN IDs, CSG IDs, and corresponding access mode information of respective cells belonging to the HeNB; the CSG information table is carried in a user equipment special message sent to an MME; or the CSG information table is carried in an S1 interface public message sent to the MME.

14. The access control system of claim 12,

the MME is specifically configured to compare the PLMN ID and the CSG ID of each entry in the CSG information table and the corresponding access mode information with CSG registration information of the UE that is performing a network access operation in an entry form, where:

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is allowed to access;

when the PLMN ID and the CSG ID corresponding to the closed working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the corresponding item of the closed working mode indication information is that the UE is not allowed to access;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by membership;

when the PLMN ID and the CSG ID corresponding to the hybrid working mode indication information are not contained in the CSG registration information of the UE, judging that the access condition of the entry corresponding to the hybrid working mode indication information is that the UE is allowed to access by a non-member identity;

and constructing a CSG access control judgment result table of the UE according to the judged access condition, and carrying the CSG access control judgment result table by the special message of the user equipment sent to the HeNB.

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