CN102811467A - Switching method and switching system - Google Patents
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Abstract
The invention discloses a switching method and a switching system. The switching method includes that a mobility management entity sends relevant access control information of users to an access-side network element, and the access-side network element realizes access control when the users switch to target cells according to the relevant access control information. According to the switching method, the relevant access control information is sent to the access-side network element in advance by a core network element, the users can complete switching at an access network as needed, interaction with the core network is omitted, and accordingly a switching process is simplified and switching delay is reduced.
Description
Technical Field
The present invention relates to an E-UTRAN technology with a femtocell deployed therein, and more particularly, to a handover method and system.
Background
The home base station is a small low-power base station and is mainly used in small-range indoor places such as homes, offices and the like. The femtocell is connected to a core network of a mobile operator through wired access equipment such as indoor cables, Digital Subscriber Lines (DSL) or optical fibers, and provides access services based on a wireless mobile communication network for specific users. The femtocell is an effective supplement to the existing network deployment, can effectively improve indoor voice and high-speed data service coverage, and has many advantages, such as low cost, low power, simple access, plug and play, backhaul saving, compatibility with the existing terminal, network coverage improvement and the like.
In a Long Term Evolution (LTE) system, a home base station is called henb (home enb). The functions supported by the HeNB are basically consistent with those of a macro base station (eNB); the process between the HeNB and the Evolved Packet Core (EPC) is substantially identical to that between the eNB and the EPC. The deployment of henbs is usually not planned by the mobile operator's network, and the coverage is small and numerous. For easier management and to support a larger number of henbs, under the Evolved terrestrial radio access network (E-UTRAN) architecture, it is also possible to introduce a new network element, namely a Home base station gateway (HeNB GW), between the henbs and the S1 connection of the EPC. The HeNB GW is used to relay UE related S1 messages and terminate non-UE related S1 procedures. Fig. 1 is an architecture diagram of an E-UTRAN with a home base station deployed in the prior art.
Since the HeNB only provides a service for a specific user, a Closed Subscriber Group (CSG) concept is introduced, and each CSG has a unique identifier, i.e., a CSG ID. In the LTE system, three different access type cells are defined for the HeNB: CSG cells (only UEs registered as members of the CSG group can access), Hybrid (Hybrid) cells (any terminal can access, but UEs registered as members of the CSG group can access with a higher priority member identity), and Open (Open) cells (any UE can access). And broadcasting the access type and the CSG ID of the HeNB at an air interface.
The core network and the UE respectively store CSG ID lists which can be accessed by member components of the user. For the CSG cell, the core network performs access control according to the CSG subscription information of the user and the CSG ID of the target cell; for the hybrid cell, member verification is also required according to the member state of the UE in the CSG, so that the target cell can provide services with different quality of service (QoS) for the UE accessed with the member identity and the non-member identity.
The UE is handed over to the HeNB in the connected state, which may be accomplished through S1 handover procedure. Because a Mobility Management Entity (MME) is required to perform access control, generally, the handover to the HeNB can only adopt an S1 handover procedure, and the existing S1 handover procedure needs to perform access control by interacting signaling with a core network, so that the handover procedure is too complicated, and handover delay is increased.
Disclosure of Invention
In view of the above, the present invention provides a handover method and system, which can simplify a handover procedure and reduce handover delay.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of handover, comprising:
the mobile management entity sends the access control related information of the user to an access side network element;
and the access side network element performs access control in the process of switching the user to the target cell according to the access control related information.
The access control related information of the sending user comprises:
the mobility management entity sends the access control related information of the user to an access side network element through an initial context establishment request message; or,
the mobile management entity sends the access control related information of the user to an access side network element through a path transfer request response message; or,
the mobility management entity sends the access control related information of the user to an access side network element through an S1 handover request message; or,
and the mobile management entity sends the access control related information of the user to the access side network element through the existing message or the newly added message.
The access control related information at least comprises a closed member group identification (CSGID) list which is allowed to be accessed by the user.
The performing access control in the process of switching the user to the target cell according to the access control related information comprises:
and after receiving the measurement report of the user, the access side network element performs access control on the UE according to the CSG ID in the access control related information of the user and the access mode of the target cell, and judges whether the switching is allowed or not and the identity after the switching to the target cell is allowed.
The determining whether to allow handover comprises:
if the target cell is a CSG cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell;
if the target cell is a CSG cell and the CSG ID of the cell is not in the access control related information, the access side network element refuses the user to switch to the target cell;
if the target cell is a hybrid cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell by the membership identity;
and if the target cell is a hybrid cell and the CSG ID of the cell is not in the access control related information, the access side network element allows the user to switch to the target cell by the non-member identity.
The method further comprises the following steps: and if the access mode of the target cell is open, executing the existing X2 or S1 switching process.
When it is determined that the access-side network element allows the user to be handed over to the target cell, or when the access-side network element allows the user to be handed over to the target cell in a non-member identity or a member identity, the method further includes: and executing the switching process from the source access side to the target access side.
The access side network element comprises a macro base station, a home base station and a home base station gateway.
When the core network element detects that the access control related information is changed or expired, the method further comprises:
the core network element informs the access side network element, and the access side network element stores updated access control related information of the user;
if the relevant information of the current serving femtocell cell in the updated access control relevant information changes, corresponding processing is performed on the user, and the processing comprises the following steps:
if the current serving home base station cell is a CSG cell, the home base station initiates the switching from the user to other cells; if the current service home base station cell is a hybrid cell, the membership of the user in the cell is changed from a member to a non-member or from the non-member to the member; accordingly, the service level of the user in the cell changes according to the membership.
And the core network element sends the updated access control related information to the access network element through the user context modification request message.
A switching system at least comprises a mobile management entity, an access side network element and a user, wherein,
the mobile management entity is used for sending the access control related information of the user to the network element at the receiving side;
and the access side network element is used for performing access control in the process of switching the user to the target cell according to the access control related information when the user is switched.
The mobility management entity is specifically configured to send access control related information of a user to an access side network element through an initial context setup request message; or, specifically, the access control method is configured to send the access control related information of the user to the access side network element through the path transfer request response message; or, specifically, the method is configured to send the access control related information of the user to the access side network element through the S1 handover request message; or, the method is specifically configured to send the access control related information of the user to the access side network element through other existing messages or newly added messages.
The access side network element is specifically configured to allow a user to switch to the target cell when the target cell is determined to be a CSG cell and the CSG ID of the cell is in the access control related information, under the condition that the X2 handover basic condition is satisfied; when the target cell is determined to be the CSG cell and the CSG ID of the cell is not in the access control related information, rejecting the user to switch to the target cell; when the target cell is determined to be a hybrid cell and the CSG ID of the cell is in the access control related information, allowing the user to switch to the target cell by the membership; and when the target cell is determined to be the hybrid cell and the CSG ID of the cell is not in the access control related information, allowing the user to switch to the target cell by using the non-member identity.
The access side network element is further configured to execute an existing X2 or S1 handover procedure when the access mode of the target cell is determined to be open.
The access side network element comprises a macro base station, a home base station and a home base station gateway.
It can be seen from the above technical solutions that the present invention includes that a mobility management entity sends access control related information of a user to an access side network element, and the access side network element performs access control in a process of switching the user to a target cell according to the access control related information. It can be seen from the switching method provided by the present invention that the core network element sends the access control related information to the access side network element in advance, when the user needs to switch, the switching process can be completed only in the access network without interacting with the core network, thus effectively simplifying the switching process and reducing the switching delay.
Drawings
FIG. 1 is an architecture diagram of a prior art E-UTRAN with home base stations deployed;
FIG. 2 is a flow chart of a handover method of the present invention;
fig. 3 is a schematic diagram of an access side network element implementing access control according to the present invention;
FIG. 4 is a schematic diagram of a switching system according to the present invention;
FIG. 5 is a flowchart illustrating a first embodiment of implementing handover according to the present invention;
FIG. 6 is a flowchart illustrating a second, third and fourth embodiment of implementing handover according to the present invention; .
Fig. 7 is a block diagram illustrating a scenario in which an eNB performs access control in a second embodiment of implementing handover according to the present invention;
fig. 8 is a composition architecture diagram of a scenario in which an HeNB performs access control in a third embodiment of implementing handover according to the present invention;
fig. 9 is a composition architecture diagram of a scenario 1 in which an HeNB GW performs access control in a fourth embodiment of implementing handover according to the present invention;
fig. 10 is a composition architecture diagram of a scenario 2 in which an HeNB GW performs access control in the fourth embodiment of implementing handover according to the present invention;
fig. 11 is a composition architecture diagram of a scenario 3 in which an HeNB GW performs access control in the fourth embodiment of implementing handover according to the present invention;
FIG. 12 is a flowchart illustrating a fifth embodiment of implementing handover according to the present invention;
Detailed Description
Fig. 2 is a flowchart of a handover method of the present invention, as shown in fig. 2, including the following steps:
step 200: the mobile management entity sends the access control related information of the user to the access side network element.
In this step, the mobility management entity may establish a request message through an initial context, and send access control related information of the user to an access side network element; or,
the mobile management entity can send the access control related information of the user to the access side network element through the path transfer request response message; or,
the mobility management entity may send the access control related information of the user to the access side network element through the S1 handover request message; or,
the mobility management entity may send the access control related information of the user to the access side network element through other existing messages or newly added messages.
The access control related information at least comprises a CSG ID list allowed to be accessed by a user.
Step 201: and the access side network element performs access control in the process of switching the user to the target cell according to the access control related information. The target cell comprises a CSG cell and a hybrid cell.
In this step, after receiving the measurement report of the UE, the source access side performs access control for the UE according to the CSG ID in the access control related information of the UE and the access mode of the target cell, and determines whether to allow the handover and the identity after the handover to the target cell.
Fig. 3 is a schematic diagram of an access side network element implementing access control according to the present invention, and as shown in fig. 3, the access control in this step specifically includes:
if the target cell is a CSG cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell;
if the target cell is a CSG cell and the CSG ID of the cell is not in the access control related information, the access side network element refuses the user to switch to the target cell;
if the target cell is a hybrid cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell by the membership identity;
and if the target cell is a hybrid cell and the CSG ID of the cell is not in the access control related information, the access side network element allows the user to be switched to the target cell by the non-member identity.
The access side network element includes, but is not limited to, a macro base station, a home base station, and a home base station gateway.
It should be noted that, in the prior art, a few MMEs do not need to perform access control, and when X2 handover basic conditions (a source base station and a destination base station are connected in the same MME pool (pool), and an X2 interface exists between the source and the target base station) are satisfied, an X2 handover procedure may be adopted, that is, when two CSG/hybrid cells having the same CSG ID are handed over, or when the source base station is a home base station and the target HeNB is a home base station in an open access mode. That is, as shown in fig. 3, when the access mode of the target cell is determined to be open, the method performs an existing X2 or S1 handover procedure, and specifically includes: according to the existing standard, under the condition that the source base station and the target are the home base stations and the target home base station is in an open mode, an X2 flow can be adopted, and the existing X2 switching flow does not need the participation of a core network, so that the X2 switching flow is simpler and more efficient; if the source base station is not a home base station but a macro base station, since the current standard does not support the X2 interface between the macro base station and the home base station, the X2 handover procedure from the macro base station to the home base station is not allowed, and therefore, the procedure is switched to the S1 procedure between the macro base station and the open home base station.
When it is determined that the access-side network element allows the user to handover to the target cell, or the access-side network element allows the user to handover to the target cell in a membership or non-membership status, the method further includes step 202: the specific implementation of the process of performing the source-to-target side handover belongs to the technology known to those skilled in the art, and is not used to limit the protection scope of the present invention, and will not be described herein again.
When the core network element detects that the user access control related information changes or expires, the method of the present invention further comprises: and the core network element informs the access side network element, and the access side network element executes corresponding change processing. Wherein the core network element may notify the access side network element through a user context modification request message or the like.
Wherein, the access side network element executes corresponding change processing, including: and storing the updated access control related information of the user. If the relevant information of the current service home base station cell in the updated relevant information of the user access control changes, corresponding processing is carried out on the user, and the processing comprises the following steps:
if the current serving home base station cell is a CSG cell, the home base station initiates the switching from the user to other cells; and if the current serving home base station cell is a hybrid cell, the membership of the user in the cell is changed from a member to a non-member or from the non-member to the member. Accordingly, the service level of the user in the cell changes according to the membership.
It can be seen from the switching method provided by the present invention that the core network element sends the access control related information to the access side network element in advance, when the user needs to switch, the switching process can be completed only in the access network without interacting with the core network, thus effectively simplifying the switching process and reducing the switching delay.
Fig. 4 is a schematic structural diagram of the handover system of the present invention, as shown in fig. 4, which at least includes a mobility management entity, an access side network element, and a user, wherein,
the mobile management entity is used for sending the access control related information of the user to the access side network element;
and the access side network element is used for performing access control in the process of switching the user to the target cell according to the access control related information when the user is switched.
The mobile management entity is specifically configured to send access control related information of a user to an access side network element through an initial context setup request message; or, specifically, the access control method is configured to send the access control related information of the user to the access side network element through the path transfer request response message; or, specifically, the method is configured to send the access control related information of the user to the access side network element through the S1 handover request message; or, the method is specifically configured to send the access control related information of the user to the access side network element through other existing messages or newly added messages.
The access side network element is specifically used for allowing a user to switch to the target cell when the target cell is determined to be the CSG cell and the CSG ID of the cell is in the access control related information; when the target cell is determined to be the CSG cell and the CSG ID of the cell is not in the access control related information, rejecting the user to switch to the target cell; when the target cell is determined to be a hybrid cell and the CSG ID of the cell is in the access control related information, allowing the user to switch to the target cell by the membership; and when the target cell is determined to be the hybrid cell and the CSG ID of the cell is not in the access control related information, allowing the user to switch to the target cell by the non-member identity.
And the access side network element is further used for executing the existing X2 or S1 handover process when the access mode of the target cell is determined to be open.
The access side network element includes, but is not limited to, a macro base station, a home base station, and a home base station gateway.
The process of the present invention will be described in detail with reference to examples.
A first embodiment of the present invention describes a scenario where an MME sends access control related information to an access side for handover optimization in an initial access process. As shown in fig. 5, the method comprises the following steps:
step 500: the UE sends an Attach Request (Attach Request) message to a source access side, such as an eNB or HeNB (abbreviated herein as (H) eNB), to initiate an initial access procedure.
In this step, if the base station serving the UE is a macro base station, the eNB directly forwards the received Attach Request message to the MME after receiving the Attach Request message;
if the base station serving the UE is a home base station and the HeNB is directly connected to the MME, the HeNB directly sends an Attach Request message to the MME; if the HeNB is connected to the MME through the HeNB GW, the HeNB firstly sends an Attach Request message to the HeNB GW, and then the HeNB GW sends the message to the MME.
Step 501: after receiving the Attach Request message, the MME performs operation processing such as authentication and security association for the UE, and if the Attach Request is accepted, executes subsequent operations to complete the Attach process.
In the attach process, the MME replies an Initial Context setup request (Initial Context setup request) message to the access side network element. The MME carries the access control related information of the UE in an initial context establishment request message and sends the initial context establishment request message to an access side network element;
or, in the attach process, the MME sends the access control related Information of the UE to the access side network element by carrying it through a new message, such as an access control Information Transfer (access control Information Transfer) message.
If the base station serving the UE is a macro base station, the MME sends the message carrying the access control related information to the eNB, and the eNB stores the access control related information of the UE after receiving the message;
if the base station serving the UE is a home base station and the HeNB is directly connected with the MME, the MME directly forwards the message carrying the access control related information to the HeNB, and the HeNB receives the message and stores the access control related information of the UE;
if the base station serving the UE is a home base station and the HeNB is connected to the MME through the HeNB GW, the MME sends a message carrying access control related information to the HeNB GW, the HeNB GW does not perform any processing on the message after receiving the message, and then sends the message carrying the access control related information to the HeNB; or, the HeNB GW performs corresponding processing after receiving the message carrying the access control related information, for example, stores the access control related information of the UE, and then sends the message carrying the access control related information to the HeNB, and after receiving the message, the HeNB stores the information if the message includes the access control related information of the UE.
Step 502: the UE sends a measurement report to the source (H) eNB.
Step 503: and the source access side performs access control on the UE according to the access control related information of the UE. The specific access control is the flow shown in fig. 3, and is not described in detail here.
Step 504: if the access control result of step 503 is allowed access, then the handover of the UE from the source cell to the target cell is performed, and the MME is not required to participate in the access control during the handover process.
In a second embodiment, this embodiment describes a scenario in which an MME sends access control related information to an access side during a handover process, and an eNB performs access control handover optimization. As shown in fig. 6, the method specifically includes:
step 600: the UE is handed over from the access side 1 to the access side 2 through an S1 or X2 handover procedure, in which the MME transmits access control related information of the UE to the access side 2.
If the UE is handed over from the access side 1 to the access side 2 through the S1 Handover procedure, the MME sends access control related information of the UE to the access side 2 through a S1 Handover Request (Handover Request) message; or, the MME sends the Access Control related information of the UE to the Access side 2 through a new message, such as an Access Control information transfer (Access Control information transfer) message;
if the UE is switched from the access side 1 to the access side 2 through the X2 switching procedure, the MME sends access control related information of the UE to the access side 2 through a Path Switch Request ACK message; or, the MME sends the Access Control related Information of the UE to the Access side 2 through a new message, such as an Access Control Information Transfer message.
Step 601: the UE sends a measurement report to a network element of the access side 2, such as an (H) eNB.
Step 602: the access side 2 performs access control for the UE according to the access control related information of the UE. The specific access control is the flow shown in fig. 3, and is not described in detail here.
Step 603: if the access control result in step 602 is that access is allowed, then handover of the UE from the access side 2 to the access side 3 is performed, and the MME is not required to participate in the access control during the handover process.
An E-UTRAN architecture for an eNB to perform an access control scenario according to the present embodiment is shown in fig. 7, and generally includes: first, the UE is handed over from (H) eNB1 to eNB2, assuming that this handover is achieved through S1 handover or X2 handover procedure, but in this handover procedure, eNB2 receives and stores access control information of the UE through the method of the second embodiment of the present invention; next, the UE initiates a handover from eNB2 to HeNB3, where HeNB3 may be connected directly to the MME or through a HeNB GW to the MME, with a direct X2 interface between eNB2 and HeNB 3; the eNB2 performs access control for the handover according to the access control related information of the UE sent by the MME to the eNB2 during the previous handover: if the access control result is access permission, the UE can be switched to the HeNB3 through an X2 switching process, and an MME does not need to participate in the access control in the switching process.
In a third embodiment, this embodiment describes a scenario in which an MME sends access control related information to an access side in a handover process, and an HeNB performs handover optimization for access control. The specific flow is shown in fig. 6, and is not described herein again.
The E-UTRAN architecture with HeNB as access control scenario according to the third embodiment is shown in fig. 8, the HeNB2 may be connected to the MME directly or through the HeNB GW 1. Substantially comprising: first, the UE is handed over from (H) eNB1 to HeNB2, assuming that this handover is implemented by S1 handover or X2 handover procedure, however, in this handover procedure, HeNB2 receives and stores access control information of the UE in this handover procedure by the method of the second embodiment of the present invention; next, the UE initiates a handover from HeNB2 to HeNB3, where HeNB3 may be connected directly to the MME or through a HeNB GW to the MME, with a direct X2 interface between HeNB2 and HeNB 3; the HeNB2 performs access control for the current switching according to the access control related information of the UE sent to the HeNB2 by the MME in the last switching process: if the access control result is access permission, the UE can be switched to the HeNB3 through an X2 switching process, and the MME does not need to participate in the switching process.
In a fourth embodiment, this embodiment describes a scenario in which an MME sends access control related information to an access side in a handover process, and an HeNB GW performs handover optimization for access control. The specific flow is shown in fig. 6, and can be specifically divided into three scenarios:
scene 1: the E-UTRAN architecture of scenario 1 in which the HeNB GW performs access control according to this embodiment is shown in fig. 9, and the HeNB2 is connected to the MME through the HeNB GW. The HeNB2 and the HeNB3 are connected to the same HeNB GW. The HeNB GW acts in the architecture as a proxy for the HeNB2 to X2 interface of the HeNB 3. Substantially comprising:
first, the UE is handed over from (H) eNB1 to HeNB 2. Suppose that this handover is implemented by S1 handover or X2 handover procedure, however, in this handover procedure, the HeNB GW receives and stores the access control information of the UE in this handover procedure by the method of the second embodiment of the present invention; the UE then initiates a handover from HeNB2 to HeNB 3. The HeNB GW performs access control for the current switching according to the access control related information of the UE sent to the HeNB GW by the MME in the last switching process: if the access control result is access permission, the UE can be switched to the HeNB3 through an X2 switching process, and the MME does not need to participate in the switching process.
Scene 2: an E-UTRAN architecture of scenario 2 in which the HeNB GW performs access control according to the present embodiment is shown in fig. 10, and the HeNB2 is connected to the MME through the HeNB GW 1. The HeNB3 may be connected directly to the MME or through the HeNB GW 2. If the HeNB3 is directly connected with the MME, the HeNB1 and the HeNB3 have a direct X2 interface; if the HeNB3 is connected to the MME through a HeNB GW2, there is a direct X2 interface between the HeNB GW1 and the HeNB GW 2. Substantially comprising:
first, the UE is handed over from eNB1 or HeNB1 to HeNB 2. It is assumed that the handover is implemented by the S1 handover or the X2 handover procedure, however, in the handover process, the HeNB GW1 receives and stores the access control information of the UE in the handover process by the method of the second embodiment of the present invention; the UE then initiates a handover from HeNB2 to HeNB 3. The HeNB GW1 performs access control for the current switching according to the access control related information of the UE sent to the HeNB GW1 by the MME in the last switching process: if the access control result is access permission, the UE can be switched to the HeNB3 through an X2 switching process, and the MME does not need to participate in the switching process.
Scene 3: an E-UTRAN architecture according to scenario 3 of the present embodiment in which the HeNB GW performs access control is shown in fig. 11, and the HeNB2 is connected to the MME through the HeNB GW. The HeNB2 and the HeNB3 are connected to the same HeNB GW. The HeNB2 is connected with the HeNB GW through an S1 interface, and the HeNB3 is also connected with the HeNB GW through an S1 interface. Substantially comprising:
first, the UE is handed over from eNB1 or HeNB1 to HeNB 2. Suppose that this handover is implemented by S1 handover or X2 handover procedure, however, in this handover procedure, the HeNB GW receives and stores the access control information of the UE in this handover procedure by the method of the second embodiment of the present invention; the UE then initiates a handover from HeNB2 to HeNB 3. The HeNB GW performs access control for the current switching according to the access control related information of the UE sent to the HeNB GW by the MME in the last switching process: if the access control result is that access is allowed, the UE can be switched to the HeNB3 through the S1 switching process, and the MME does not need to participate in the access control in the switching process.
A fifth embodiment, this embodiment describes an implementation process of notifying an access side network element when an MME detects that access control related information of a UE changes or expires, as shown in fig. 12, specifically including:
step 1200: and the MME sends the access control related information of the UE to the access side. The access control related information of the UE includes at least a CSG ID list to which the UE is allowed to access. The MME may send access control related information of the UE to the access side in an initial access procedure of the UE or in a handover procedure. The access side includes but is not limited to eNB, HeNB GW.
Step 1201: when the MME detects that the access control related information of the UE is changed or overdue, the MME carries the updated access control related information in a UE context modification Request (UE context modification Request) message to inform an access side.
Step 1202: and the access side stores the updated access control related information of the UE.
In this step, if the relevant information of the current serving hnb cell in the updated access control relevant information changes, further corresponding processing needs to be performed on the user, including: if the current serving femtocell cell is a CSG cell, (H) the eNB initiates the switching from the user to other cells; and if the current serving home base station cell is a hybrid cell, changing the member state (membership status) of the cell from a member (member) to a non-member (non-member) or from the non-member (non-member) to the member (member) by the user. Accordingly, the service level of the user in the cell changes according to the membership status.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (15)
1. A method of handover, comprising:
the mobile management entity sends the access control related information of the user to an access side network element;
and the access side network element performs access control in the process of switching the user to the target cell according to the access control related information.
2. The method of claim 1, wherein the sending the access control related information of the user comprises:
the mobility management entity sends the access control related information of the user to an access side network element through an initial context establishment request message; or,
the mobile management entity sends the access control related information of the user to an access side network element through a path transfer request response message; or,
the mobility management entity sends the access control related information of the user to an access side network element through an S1 handover request message; or,
and the mobile management entity sends the access control related information of the user to the access side network element through the existing message or the newly added message.
3. The handover method according to claim 1, wherein the access control related information at least includes a closed member group identity (CSG ID) list allowed to be accessed by the user.
4. The handover method according to claim 3, wherein the performing access control during the handover of the user to the target cell according to the access control related information comprises:
and after receiving the measurement report of the user, the access side network element performs access control on the UE according to the CSG ID in the access control related information of the user and the access mode of the target cell, and judges whether the switching is allowed or not and the identity after the switching to the target cell is allowed.
5. The handover method of claim 4, wherein the determining whether to allow handover comprises:
if the target cell is a CSG cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell;
if the target cell is a CSG cell and the CSG ID of the cell is not in the access control related information, the access side network element refuses the user to switch to the target cell;
if the target cell is a hybrid cell and the CSG ID of the cell is in the access control related information, the access side network element allows the user to switch to the target cell by the membership identity;
and if the target cell is a hybrid cell and the CSG ID of the cell is not in the access control related information, the access side network element allows the user to switch to the target cell by the non-member identity.
6. The handover method according to claim 5, further comprising: and if the access mode of the target cell is open, executing the existing X2 or S1 switching process.
7. The handover method according to claim 5, wherein when it is determined that the access-side network element allows the user to handover to the target cell, or the access-side network element allows the user to handover to the target cell with a non-membership identity or a membership identity, the method further comprises: and executing the switching process from the source access side to the target access side.
8. The handover method according to any one of claims 1 to 7, wherein the access side network element comprises a macro base station, a home base station, and a home base station gateway.
9. The handover method according to claim 8, wherein when the core network element detects that the access control related information is changed or expired, the method further comprises:
the core network element informs the access side network element, and the access side network element stores updated access control related information of the user;
if the relevant information of the current serving femtocell cell in the updated access control relevant information changes, corresponding processing is performed on the user, and the processing comprises the following steps:
if the current serving home base station cell is a CSG cell, the home base station initiates the switching from the user to other cells; if the current service home base station cell is a hybrid cell, the membership of the user in the cell is changed from a member to a non-member or from the non-member to the member; accordingly, the service level of the user in the cell changes according to the membership.
10. The handover method according to claim 9, wherein the core network element sends the updated access control related information to the access network element through a user context modification request message.
11. A handover system, comprising at least a mobility management entity, an access side network element, and a user, wherein,
the mobile management entity is used for sending the access control related information of the user to the network element at the receiving side;
and the access side network element is used for performing access control in the process of switching the user to the target cell according to the access control related information when the user is switched.
12. The handover system according to claim 11, wherein the mobility management entity is specifically configured to send the access control related information of the user to the access-side network element through an initial context setup request message; or, specifically, the access control method is configured to send the access control related information of the user to the access side network element through the path transfer request response message; or, specifically, the method is configured to send the access control related information of the user to the access side network element through the S1 handover request message; or, the method is specifically configured to send the access control related information of the user to the access side network element through other existing messages or newly added messages.
13. The handover system according to claim 11, wherein the access-side network element is specifically configured to allow the user to handover to the target cell when the target cell is determined to be a CSG cell and the cell CSGID is in the access control related information, when the X2 handover basic condition is satisfied; when the target cell is determined to be the CSG cell and the CSG ID of the cell is not in the access control related information, rejecting the user to switch to the target cell; when the target cell is determined to be a hybrid cell and the CSG ID of the cell is in the access control related information, allowing the user to switch to the target cell by the membership; and when the target cell is determined to be the hybrid cell and the CSG ID of the cell is not in the access control related information, allowing the user to switch to the target cell by using the non-member identity.
14. The handover system according to claim 13, wherein the access-side network element is further configured to perform an existing X2 or S1 handover procedure when the access mode of the target cell is determined to be open.
15. The handover system according to any one of claims 11 to 14, wherein the access side network element comprises a macro base station, a home base station, and a home base station gateway.
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