CN101299870B - Control method, system and apparatus for accessing private base station - Google Patents

Abstract

The embodiment of the present invention discloses a control method, system and device for accessing a private base station, wherein the method is: after the network side device receives a location update request, it determines that the user equipment is currently away from the private base station that allows it to access According to the determination result, adjust the public land mobile network PLMN search period of the user equipment and notify the user equipment, and the user equipment performs PLMN search according to the adjusted search period during the access process. The method, system and device can flexibly adjust the search period for the UE to perform PLMN search according to the current location of the UE, so as to ensure that when the UE is close to the private base station, it can find and access the private base station in time; When the base station is connected to the base station, the PLMN search is performed as little as possible, so as to save the power consumption of the UE. The embodiments of the present invention also provide corresponding control means for the problem of mobility restriction.

Description

Control method, system and device for accessing private base station

technical field

The present invention relates to the technical field of mobile communication, in particular to a control method, system and device for accessing a private base station. the

Background technique

At present, mobile communication technology is developing rapidly with the continuous improvement of people's requirements. With the continuous growth of third-generation mobile communication technology (3G) users and the deepening of long-term evolution technology (LTE) research, as a typical representative of private base stations, indoor base stations (hNB, Home NodeB) or indoor access points (AP) , is receiving more and more attention. Private base stations refer to miniaturized small base stations used in homes or offices. They may be completely private, or they may be open to the public with different priorities and permissions set. Their ownership belongs to private individuals, not to the government or Operators; its users may be a small range of users, or a large range of users. Taking hNB or AP as a private base station as an example, using hNB or AP to realize wireless access can make better use of existing network resources, better protect the cost of network equipment operators, and integrate mobile access network and fixed access The respective advantages of the network, a typical indoor access scene is shown in Figure 1. the

Referring to Fig. 1 , in which UE is a mobile terminal access device, hNB or AP as a private base station is routed to an access gateway through an access network, and enters a wireless Universal Mobile Telecommunications System (UMTS) or LTE unified land radio access network ( UTRAN). The access network can be a fixed network IP LAN or a DSL access network. Therefore, compared with the traditional access mode of the macro base station, the access mode shown in Figure 1 is more flexible and can fully Utilize existing fixed network resources. the

Because the indoor access scenario shown in Figure 1 can provide high-speed, low-cost services, it is attracting more and more attention from international mainstream operators and international equipment manufacturing giants. Accompanied by the increasing attention, various access technologies based on indoor access scenarios have been proposed in the prior art. the

Access technology one:

In this access technology, by carrying AP information in the broadcast message of the macro cell, the UE searches for the AP, and realizes access according to the search result. the

Although this method can realize indoor access, because there are usually many APs in a macro cell, this will cause serious overload of broadcast information in the macro cell. the

Access technology two:

In this access technology, once the user enters the coverage area of the indoor base station, it is required to switch on and off once, so as to prompt the user terminal (UE) to perform cell selection to camp in the cell of the indoor base station, so as to realize access AP as a private base station. the

The disadvantage of this access technology is that it cannot guarantee that the UE will definitely stay in the cell; in addition, the operation mode of switching on and off requires frequent manual intervention. Therefore, in practical applications, it is not recommended to use this technology to achieve indoor access .

At the same time, there is already an access technology related to domestic roaming in the existing technology. For the convenience of expression, in the following expressions, the AP is used as a private network as an example for illustration. The details of this access technology are as follows:

In the prior art, the UE can perform national roaming based on the public land mobile network (PLMN) identification (ID), where the PLMN ID consists of a mobile country code (MCC) and a mobile network code (MNC), A total of 3 bytes and 6 numbers, using this PLMN ID can realize the selection mechanism of PLMN, so as to realize domestic roaming. Among them, the definition of domestic roaming is: the MCC in the PLMN ID is the same, but the MNC is different; the corresponding definition of international roaming is: the MCC in the PLMNID is different. the

Based on the above definition of domestic roaming, the UE has a corresponding mechanism: when the UE is in another PLMN area in the same country as the home network (HPLMN) (that is, when doing domestic roaming), it will periodically search for its HPLMN . In other words, in the automatic network selection mode, when the UE is in a visited PLMN (VPLMN), the UE will always preferentially select the PLMN with the highest priority, namely HPLMN, for access. The definition of HPLMN is based on the UE's International Mobile Subscriber Identity (IMSI). If the first few digits of the IMSI MCC/MNC are consistent with the current PLMN ID, it means that this is the UE's HPLMN. the

From the above introduction, it can be seen that based on the above-mentioned domestic roaming principle, it is possible to perform manual/automatic access of the UE to the PLMN of the AP based on the PLMN search. People are also making related efforts to realize this technology. Still have the following problems in practical application:

1. Based on domestic roaming, the UE will often do PLMN search. The search period is 6 minutes to 8 hours. Generally, 6 minutes is the minimum search period and 60 minutes is the default search period. In the prior art, a fixed time value is used as the search period, and once fixed, the PLMN search is always performed according to the search period, so that the search period cannot be reasonably adjusted according to the location of the UE. the

2. The above-mentioned private network access technology based on domestic roaming does not take into account issues related to mobility restrictions, and cannot prevent the UE from accessing the corresponding private network. the

Contents of the invention

In view of this, the technical problem to be solved by the embodiments of the present invention is to provide a control method, system and device for accessing a private base station, so as to provide a reasonable search period for the private base station and avoid UE consumption caused by an unreasonable search period. The battery is high or the search is not timely. the

In order to achieve the above purpose, an embodiment of the present invention provides a control method for accessing a private base station, the method includes:

When the user equipment enters the location area RA/routing area LA where the first macro cell is located, the user equipment initiates a location update request; wherein, the first macro cell and the private base station that allows the user equipment to access The neighborhood is adjacent;

After receiving the location update request, the network side device determines the distance between the user equipment and the private base station that allows it to access, and adjusts the public land mobile network PLMN search of the user equipment according to the determination result. period and notify the user equipment, and the user equipment performs PLMN search according to the adjusted search period during the access process. the

The embodiment of the present invention also provides a control system for accessing a private base station, the system includes: network side equipment and user equipment, wherein:

When the user equipment is used to enter the RA/LA where the first macro cell is located, it initiates a location update request; wherein the first macro cell is adjacent to a cell covered by a private base station that allows the UE to access;

The network side device is configured to determine the current distance between the user equipment and the private base station that allows it to access after receiving the location update request, and adjust the PLMN search of the user equipment according to the determination result. period, and notify the user equipment to adjust accordingly. the

The embodiment of the present invention also provides a control device for accessing a private base station, the device includes:

A receiving unit, configured to receive a location update request sent by the user equipment;

The determination unit is used to determine the distance between the user equipment and the private base station that allows it to access;

The adjustment unit is used to determine the determination result of the determination unit and adjust the PLMN search period of the user equipment;

The notification unit is configured to notify the user equipment of the adjusted PLMN search cycle. the

In the embodiment of the present invention, in order to prevent the UE from accessing the corresponding private network in consideration of mobility restrictions, the following technical solutions are also provided:

An embodiment of the present invention provides a control method for accessing a private base station, storing relevant subscription information of the user equipment and the private base station on the network side device, and the method includes:

After the connection between the private base station or the macro cell and the user equipment is established, the network side equipment receives the message sent by the private base station; wherein, the message carries the identity of the user equipment and the identity of the private base station itself;

The network side device obtains the subscription information of the user equipment and the private base station from a database storing subscription information according to the user equipment identifier and the identifier of the private base station itself;

The network side device judges whether the user equipment is allowed to access the private base station according to the subscription information, and notifies the private base station of the judgment result, so that the private base station controls the connection of the user equipment according to the result. enter. the

The embodiment of the present invention also provides a control system for accessing a private base station. The system includes: network side equipment and a private base station, wherein:

The network side equipment is used for:

storing relevant subscription information of user equipment and private base stations; and,

After receiving the message sent by the private base station, according to the user equipment identifier and the private base station's own identifier, obtain the subscription information of the user equipment and the private base station from the database storing the subscription information, and judge the user according to the subscription information Whether the device is allowed to access the private base station, and inform the private base station of the judgment result;

The private base station is used to: after establishing a connection with the user equipment, send a message to the network side equipment to notify the network side equipment to determine whether the user equipment is allowed to access the private base station. the

The embodiment of the present invention also provides a control device for accessing a private base station, the device includes:

The storage unit is used to save the relevant subscription information of the user equipment and the private base station;

The judging unit is configured to, after receiving the message sent by the private base station, obtain the subscription information of the user equipment and the private base station from a database storing the subscription information according to the user equipment identifier and the identifier of the private base station itself, and according to the The subscription information determines whether the user equipment is allowed to access the private base station, and notifies the private base station of the determination result. the

The embodiment of the present invention also provides a control method for accessing a private base station, the method comprising:

The user equipment sends a connection request to the private base station;

The private base station judges whether the user equipment currently requesting access is a user equipment that is allowed to access by comparing the subscription information of the user equipment stored by itself according to the user equipment identifier in the request message, and controls the user equipment according to the judgment result. Access to equipment. the

The embodiment of the present invention also provides a control device for accessing a private base station, the device includes:

The receiving unit is used to receive the connection request sent by the user equipment;

The judging unit is used to compare the subscription information of the user equipment stored by the device itself according to the user equipment identifier in the connection request, and check whether the user equipment currently requesting access is a user equipment that is allowed to access;

Notification unit: for notifying the user equipment of the determination result of the determination unit.

The embodiment of the present invention also provides a control method for accessing a private base station, judging whether the current state of the private base station is in the state of not being in the OOS state within the service coverage range, in the IS state within the service coverage range, or in the partial IS state , the IS/OOS state of some OOS, and when it is judged that the private base station is currently in the OOS state, assign a separate routing area code LAC or routing area code RAC for the private base station; the method includes:

When the user equipment requests to access the private base station, if it is determined that the user equipment is not allowed to access the private base station, according to the state of the private base station itself, prompt the user equipment that the service is limited cause or handover the user equipment to the corresponding cell. the

The embodiment of the present invention also provides a control device for accessing a private base station, the device includes:

A state judging unit, used to judge whether the private base station is currently in the OOS state;

An identifier allocation unit, configured to assign a separate routing area identifier for the private base station after the state judgment unit judges that the private base station is currently in the OOS state;

The error reason prompting unit is configured to prompt the user equipment of the reason for service restriction according to the state of the private base station itself after the private base station determines that the user equipment is not allowed to access. the

Compared with prior art, the beneficial effect of the embodiment of the present invention is:

1. According to the current location of the UE, it can flexibly adjust the search period of the UE for PLMN search, so as to ensure that when the UE is close to the private base station, it can find the private base station and access it in time; when it is far away from the private base station, it can The PLMN search is performed as little as possible, thereby saving the power consumption of the UE. the

2. The embodiment of the present invention provides corresponding control means for the problem of mobility restriction, so that the private base station can avoid the access of the user equipment that is not allowed, and can provide the access to the user equipment when the access of the user equipment is not allowed. The user equipment will be prompted accordingly, so as to ensure network security and improve service quality. the

Description of drawings

Figure 1 is a schematic diagram of a typical indoor access scenario;

Fig. 2 is the flowchart of the method provided by embodiment one of the present invention;

Fig. 3 is a schematic diagram of a scene where the method shown in Fig. 2 can be specifically applied;

Fig. 4 is the flowchart of the method provided by the second embodiment of the present invention;

Fig. 5 is a schematic diagram of a scene where the method shown in Fig. 4 can be specifically applied;

Fig. 6 is the flowchart of the method provided by the third embodiment of the present invention;

Fig. 7 is the flowchart of the method provided by the fourth embodiment of the present invention;

FIG. 8 is a flowchart of a handover method involved in Embodiment 4 of the present invention;

FIG. 9 is a flowchart of another handover method involved in Embodiment 4 of the present invention;

Figure 10 is a schematic diagram of the scene indicating whether the AP is located in the service coverage area of the macro cell;

Figures 11a and 11b are schematic diagrams of scenarios of whether the AP is located in the service coverage of the corresponding type of macro cell in one embodiment of the present invention;

FIG. 12 is a flow chart of the method provided by Embodiment 5 of the present invention. the

Detailed ways

Embodiments of the present invention provide a control method, system and device for accessing a private base station, based on the scenario that a UE can select a PLMN based on domestic roaming between a macro cell and a cell covered by a private base station, thereby In the (Idle) state, the network corresponding to the private base station is found, and access to the private base station is realized. the

For the convenience of expression, in the description of each embodiment of the present invention, the AP is used as an example of a private base station for illustration. In these embodiments, of course, other private base stations including hNB can also be used, which does not affect the scope of the present invention. accomplish. the

In order to meet the above scenario, in the embodiment of the present invention, the following configurations for the AP network are performed:

1. For the newly built AP network, you can consider assigning a separate PLMN ID to each operator for the operation of the AP network. Although there are not many PLMN IDs that can be allocated, it should be enough for most cases . the

2. For users who have purchased AP, they can be issued a new SIM card to replace their PLMN. If the user intends to use the old SIM card, they can replace their PLMN by modifying the IMSI in the SIM card, so as to realize the The HPLMN of the UE is the PLMN of the AP network purchased by the user;

3. Set the PLMN separately allocated for the AP network to HPLMN, that is to say, through this setting, set the PLMN of the macro cell opposite to the AP network to VPLMN, so that based on this setting, the UE will do a domestic based The roaming PLMN searches (search), and finds and accesses the AP network in the idle (Idle) state. the

In the embodiment of the present invention, a control method for accessing a private base station is provided. In this method, the following problem is first considered: if the search period is set to be very short, such as 6 minutes, relatively frequent PLMN searches will be performed. However, a large amount of power in the UE will be consumed every time the PLMN search is performed. Therefore, after the UE leaves the AP network, a large amount of power of the UE will be consumed due to the continuous search for the HPLMN. On the contrary, if the search period is set relatively long, when the UE enters the coverage area of the AP network, the AP cannot be found in time, thereby affecting the service quality. the

Therefore, in the control method provided in this embodiment, the network side determines the distance between the UE and the AP, and automatically adjusts the PLMN search cycle of the UE according to the determination result, so that when the UE is far away from the AP, the search cycle is adjusted to long until it reaches the maximum or close the PLMN search; and when the UE is close to the AP, the search period is shortened. the

In the following, two embodiments are used to describe the above-mentioned control method in detail. the

Embodiment one:

Referring to Fig. 2, when the network side determines that the UE is close to the AP, the method provided by Embodiment 1 of the present invention specifically includes:

Step 201: When the UE enters the location area (RA)/routing area (LA) where the first macro cell is located, the UE initiates an RA/LA location update (RAU/LAU) request; wherein, the first macro cell and the allowed The cell covered by the AP accessed by the UE is adjacent;

Step 202: After receiving the RAU/LAU request, the core network equipment (CN) on the network side determines that the UE is currently relatively close to the AP that allows it to access, and shortens the PLMN search period of the UE according to the determination result;

Wherein, in the embodiment of the present invention, the corresponding relationship between each AP and its adjacent macro cells is stored in advance in the network side, and according to the corresponding relationship, the network side can implement the above-mentioned determined steps, specifically:

The network side obtains the RA/LA of the macro cell where the UE is currently located, and determines the AP corresponding to the UE, and determines the RA/LA of the macro cell adjacent to the AP corresponding to the UE according to the above correspondence;

Determine whether the RA/LA of the macro cell where the UE is currently located is similar to or overlaps with the RA/LA of the macro cell adjacent to the AP, and if so, it can be determined that the UE is approaching the AP;

Of course, in other embodiments of the present invention, other methods can also be used to realize the above judgment of determining whether the UE is approaching the AP, which does not affect the realization of the present invention;

In addition, in the embodiment of the present invention, the degree of reducing the PLMN search cycle can be determined according to the above determination result, so that the closer the AP is to the AP, the smaller the search cycle; of course, a fixed value can also be used as Both ways of reducing the target value of the search period do not affect the realization of the present invention.

Step 203: The CN notifies the UE of the modified PLMN search cycle, and the UE searches for the PLMN according to the PLMN search cycle, and searches for and accesses the AP when it is within the coverage of the HPLMN AP. the

In the embodiment of the present invention, the CN may notify the UE of the modified PLMN search cycle by means of data download, such as a short message, and of course other methods may also be used to realize the notification. the

Referring to Figure 3, the method shown in Figure 2 can be specifically applied to the two scenarios shown in Figure 3, specifically:

Scenario 1: The UE directly enters the AP from a macro cell adjacent to the AP; where, since the AP network settings have been made in advance, when the UE enters the AP from the macro cell, it is equivalent to that the UE has Return to HPLMN from VPLMN in domestic roaming;

Scenario 2: The UE returns to its own hNB from its neighboring hNB; this scenario means that the UE has selected its own HPLMN, and what the UE needs to do is: perform cell reselection to return to its own HPLMN; Of course, this scenario is based on the assumption that the neighboring hNB has added the UE's own hNB to its neighboring cell list, so that the UE can reselect its own hNB. the

Embodiment 2: Referring to FIG. 4, when the network side determines that the UE is far away from the AP, the method provided in Embodiment 2 of the present invention specifically includes:

Step 401: When the UE leaves the RA/LA where the first macro cell is located, the UE initiates a RAU/LAU request; wherein, the first macro cell is adjacent to a cell covered by an AP that allows the UE to access;

Step 402: After receiving the RAU/LAU request, the CN on the network side determines that the UE is currently far away from the AP that allows it to access, and according to the determination result, lengthens the PLMN search period of the UE;

Wherein, in this embodiment of the present invention, the determination process in step 402 can be implemented in a manner similar to that described in Embodiment 1; similarly, similar to Embodiment 1, it can be decided to increase the PLMN search cycle according to the determination result To a certain extent, the farther away from the AP, the greater the search period; of course, only a fixed value can be used as the target value for increasing the search period, and neither of these two methods will affect the realization of the present invention. the

Step 403: The CN notifies the UE of the modified PLMN search cycle, and the UE searches for the PLMN according to the PLMN search cycle, and searches for and accesses the AP when it is within the coverage of the HPLMN AP. the

In this embodiment of the present invention, the data download method described in Embodiment 1 or other methods may also be used to notify the UE of the modified PLMN search period. the

Referring to Figure 5, the method shown in Figure 4 can be specifically applied to the two scenarios shown in Figure 5, specifically:

Scenario 3: The UE leaves its hNB and enters its neighboring hNB, or, the UE leaves its own HPLMN but is still under the coverage of its neighboring macro cell or in the RA of the neighboring macro cell.

Scenario 4: The UE is not within the coverage of the LA/RA to which its neighboring macro cell belongs. the

Corresponding to Embodiment 1 and Embodiment 2 above, the embodiment of the present invention also provides a corresponding control system for accessing private base stations, including network side equipment and UE, wherein:

When the UE is used to enter the RA/LA where the first macro cell is located, the UE initiates a location update request; wherein the first macro cell is adjacent to a cell covered by an AP that allows the UE to access;

The network side device is used to determine the distance between the UE and the AP that allows it to access after receiving the location update request, adjust the PLMN search cycle of the UE according to the determination result, and notify the UE Adjust accordingly. the

Wherein, the network side device may be a CN, and the network side may judge whether the RA/LA of the macro cell where the UE is currently located is similar to or overlaps with the RA/LA of the macro cell adjacent to the AP to determine whether the UE The proximity to the AP. the

Similarly, the embodiment of the present invention also seeks to protect the network-side device as described in the above system. In addition to the unit that realizes the network processing function, the network-side device also includes:

A receiving unit, configured to receive a location update request sent by the UE;

A determination unit, used to determine the distance between the UE and the AP that allows it to access;

The adjustment unit is used to determine the determination result of the determination unit and adjust the PLMN search period of the UE;

The notification unit is configured to notify the UE of the adjusted PLMN search period. the

Of course, the units described in the above network side equipment can also exist as a separate control device. the

In the embodiment of the present invention, in addition to providing the control method for controlling the PLMN search cycle as described above, a control method for judging whether the UE is allowed to access a private base station is also provided. Below, in conjunction with Embodiment 3 The method is described in detail with embodiment four:

In Embodiment 3 and Embodiment 4, it is necessary to judge whether the UE is an authorized user allowed to access through the CN equipment on the network side. Therefore, it is necessary to save the relevant subscription information of the UE and the AP on the CN side. The subscription information includes at least private base station identification/base station cell list, and private base station data including private base station owner, and user equipment subscription information including at least private base station identification or base station cell list, and user identification; or , the saved signing information may also include the contents shown in Table 1 and Table 2;

Table 1

Table 2

Wherein, in other embodiments of the present invention, the above-mentioned subscription information may also be stored on both the CN and the AP, which does not affect the realization of the present invention;

After the above signing information is saved, the methods provided in Embodiment 3 and Embodiment 4 of the present invention can be realized. The two embodiments will be described in detail below with reference to the accompanying drawings. the

Embodiment three:

In this embodiment, the UE is a UE that is allowed to be accessed by the AP. In this case, referring to FIG. 6, the method for controlling access to a private base station specifically includes:

Step 601: The UE establishes an RRC connection with the AP; wherein, during the connection establishment process, the UE sends its own identity, such as IMSI, to the AP; after the UE establishes an RRC connection with the AP, the private base station can request the user equipment to check other surrounding carrier frequencies Or other radio access technologies perform measurements so that the private base station initiates a handover procedure for user equipment that is not allowed to access the private base station. the

Step 602: The AP sends an initial message to the CN to request a service; wherein, the message carries the identity of the UE and the identity of the AP itself; wherein, in the embodiment of the present invention, the AP sends the initial message to the CN. In other embodiments of the invention, this step can also be implemented by sending other messages, which does not affect the realization of the present invention;

Step 603: According to the UE identity and the identity of the AP itself, the CN requests the subscription information of the UE and the AP from the database storing the subscription information; wherein, the database can be a home location register (HLR), or it can be other database of contract information functions;

Step 604: The database returns the obtained UE and AP subscription information to the CN, and the CN judges according to the subscription information that the UE is allowed to access the AP;

Step 605: The CN informs the AP to allow the current UE to access; wherein, in the embodiment of the present invention, the CN informs the AP to allow the UE to access through a direct message;

Step 606: The UE accesses the network through the AP to obtain the service.

Embodiment 4: In this embodiment, the UE is a UE that is not allowed to be accessed by the AP. In this case, referring to FIG. 7, the control method for accessing a private base station specifically includes:

Step 701～step 703 is the same as step 601～step 603;

Step 704: The database returns the obtained UE and AP subscription information to the CN, and the CN judges according to the subscription information that the UE is not allowed to access the AP;

Step 705: The CN informs the AP that the current UE is not allowed to access; wherein, in the embodiment of the present invention, the CN uses a direct message to inform the AP that the UE is not allowed to access;

So far, in the embodiment of the present invention, the process related to the control method ends; in the preferred embodiment of the present invention, in order to provide users with better services, the following steps may be further included:

Step 706: The AP directly requests the UE to perform blind handover, so as to handover to an adjacent macro cell or other public private base stations that the user equipment is allowed to access. Even if there is no measurement of the surrounding cells by the user equipment, the private base station can know the information of some surrounding cells through the handover that occurred before, or by installing listening devices on the private base station, so that the private base station can trigger the user equipment to perform blind handover . the

In the embodiment of the present invention, since the AP knows some information about neighboring cells, blind handover can be performed without UE measuring neighboring macro cells; if blind handover is not used, the user equipment is handed over to Adjacent macro cells or private base stations that allow access. the

Step 707: The AP initiates a handover, so that the UE is handed over to an adjacent macro cell, wherein the handover signaling process and relocation process for the handover requires interaction between the AP and the CN side node;

Step 708: The AP notifies the UE to switch to the adjacent cell, and the UE switches to the adjacent cell after receiving the notification. the

In the fourth embodiment, blind handover is adopted, and the UE is handed over to the adjacent macro cell through the AP. In other embodiments of the present invention, when the UE initially establishes a connection with the macro cell, the following two methods are also provided: The handover method is to hand over the UE to other APs through the macro cell when the current AP does not allow the UE to access, specifically;

Handover method 1: In this method, the UE is in a macro cell, and when the UE is close to an AP that allows itself to access (the AP is within the coverage of the macro cell—IS), the macro cell will hand over the UE to the AP; Here, the RNC and NB functions of UMTS are integrated in the AP, so the interface from the AP to the CN (SGSN or MSC) will be equivalent to the Iu interface. Referring to Figure 8, the switching method specifically includes:

Step 800: The CN can obtain the (AP) subscription information of the UE in the active state from the CN database—this means that the Iu interface of the macro cell needs to transmit the association information of UE~AP (or the macro cell that allows the UE to access The subscription information of the adjacent AP);

Step 801: The macro cell sends measurement enable control information to the UE, which includes information about nearby APs that are allowed to be accessed by the UE——some air interface wireless parameter configurations of the AP, such as scrambling codes, etc., which are convenient for the UE to search. the

Step 802: When the macro cell finds that the AP that allows access is a good handover candidate cell, and confirms that the UE is allowed to access, it sends a relocation request to the CN; thus starting the UMTS standard RNC relocation process;

Step 803: The CN sends a relocation request to the AP described in step 802. In practical applications, the request may need to span multiple CN nodes, such as multiple SGSNs. For the convenience of description, no further description is given here, but it is regarded as A CN node (such as SGSN) operates. At this time, some special information needs to be transmitted to be different from the general process of UMTS. This information may be some AP-related subscription information of the UE, which is used for the AP to check the visiting UE. If it is not a UE that is allowed to access, the AP may will reject the switching process. the

Step 804: The AP prepares radio resources for the UE, and sends a relocation request confirmation to the CN after preparation. the

Step 805: CN sends a relocation command to the macro cell. the

Step 806: The macro cell sends physical channel reconfiguration to the UE. the

Step 807: UE switches to AP, and sends physical channel reconfiguration completion to AP. the

So far, the UE has completed the handover from the macro cell to the AP. It should be noted that: the difference between the above procedure and the general handover procedure is that some UE-AP-related subscription information needs to be used in these procedures. Especially the Iu interface, for the AP, is the information that needs to be transmitted by the interface of the AP-Cn node. the

Handover method 2: In this method, for a UE that is not allowed to access a private AP, if there is a public AP in the current macro cell, the macro cell may switch the UE to a public AP; the public AP can be a small APs corresponding to supermarkets and offices;

At this time, the CN may also check whether the UE is allowed to access the AP, and the AP may also check whether the UE is allowed to access; because even if the access is allowed, there may be a difference in priority, for example, if the super user comes , that is, when the AP owner comes, other users may be preempted and excluded. Therefore, the switched UE also needs to check some subscription information related to the AP. the

Referring to Figure 9, this switching method specifically includes:

Step 900: The macro cell notifies the UE of the public AP information nearby;

In the embodiment of the present invention, the macro cell performs the above-mentioned notification through the broadcast information of its macro cell; if the number of public APs is large, so that the broadcast information cannot carry the information of all public APs, it can also be notified only through the broadcast information There are public APs, and inform the UE of some basic information common to these public APs, without telling which public APs there are;

After notifying the UE of the information of the public AP, the UE can measure the existence of the public AP;

Step 901: The macro cell filters out the public APs that the UE is allowed to access, sends handover measurement control to the UE, and the UE sends a measurement report to the macro cell;

Steps 902 to 907 are the same as steps 802 to 807. the

In the second handover method, the UE access monitoring is carried out for public APs, which will greatly simplify the process; in addition, considering that public APs have the advantages of increasing coverage and reducing the load of macro cells, operators can pay for using public APs. Lower it to attract more users.

In the above third and fourth embodiments, since it is necessary to judge whether the UE is allowed to access the AP, the content transmitted between the AP ~ CN, that is, on the Iu interface, is different from that transmitted by existing signaling. vary, specifically:

1) The AP needs to notify the CN to check whether the UE is allowed to access the AP through the initial message (Initial UE Message) as described above. Therefore, it is necessary to add the identity of the AP to the initial message, so that the CN can implement all UEs based on the identity of the AP. check above. In practical applications, an AP can be uniquely identified in a location area or routing area based on PLMN+LAC(+RAC)+APidentity;

See Table 3. After adding the AP identity (APidentity) after the original Initial UE Message message, the format of the message is:

IE/Group Name Presence Range IE type and reference Semanticsdescription Criticality Assigned Criticality MessageType m 9.2.1.1 YES ignore CNDomainIndicator m 9.2.1.5 YES ignore LAC m 9.2.3.6 YES ignore RAC C-ifPS 9.2.3.7 YES ignore SAI m 9.2.3.9 YES ignore NAS-PDU m 9.2.3.5 YES ignore Iu Signaling m 9.2.1.38 YES ignore

ConnectionIdentifier Global RNC-ID m 9.2.1.39 YES ignore GERAN Classmark o 9.2.1.57 YES ignore Selected PLMNIdentity o 9.2.3.33 YES ignore NAS SequenceNumber o 9.2.3.34 YES Ignore Permanent NASUE Identity o 9.2.3.1 YES Ignore AP identity o xxxx YES Ignore

table 3

Table 4 supplements Table 3, specifically:

condition Explanation ifPS This IE shall be present if the CN Domain Indicator IE is set to “PS domain”.

Table 4

Table 5 shows how to identify the AP:

IE/Group Name Presence Range IE type and reference Semantics description AP identity m OCTET STRING(2)

table 5

2) The CN needs to give the AP a reply through the Iu interface to inform the AP of the corresponding inspection results:

After the CN checks, for example, MSC or SGSN obtains the subscription information of the UE in the HLR and judges whether the UE is allowed to use the AP. The CN side needs to notify the AP of the above-mentioned access check through the direct transmission message of the Iu interface. the result of. the

In the embodiment of the present invention, if the result of the check is that the access is allowed, no change is made to the direct transmission message; if the access is denied, the result of the access check is added to the direct transmission message to indicate that the access check fails; In a preferred embodiment of the present invention, the rejection reason can be further added to express to the AP that the access rejection is caused by the failure of the access check; the format of the direct transmission message with the check result and the rejection reason added can refer to Table 6:

IE/Group Name Presence Range IE type and reference Semantics description Criticality Assigned Criticality Message Type m 9.2.1.1 YES ignore NAS-PDU m 9.2.3.5 YES ignore LAC o 9.2.3.6 YES ignore RAC o 9.2.37 YES ignore SAI o 9.2.3.9 YES ignore SAPI o 9.2.3.8 YES ignore Redirection Indication o 9.2.3.36 YES ignore Redirection Completed o 9.2.3.35 YES lgnore AP access check result o xxxx YES lgnore >AP Access RejectCause Value m ENUMERATED(AP is not allowed...) YES ignore

Table 6

Wherein, in the third embodiment and the fourth embodiment above, the CN is used as the network side device, and in other embodiments of the present invention, other network side devices may also be used to implement the present invention. the

For the methods described in the third and fourth embodiments above, the embodiment of the present invention also provides a corresponding control system and device for accessing a private base station, and the system and device will be introduced respectively below. the

The system includes: network-side equipment and a private base station; wherein, for the convenience of description, CN is used as the network-side equipment and AP is used as a private base station for description in the embodiment of the present invention:

The CN is used for:

Save the relevant subscription information of the UE and the AP. For the content included in the subscription information, please refer to Table 1 and Table 2; and,

After receiving the initial message sent by the AP, according to the UE identity and the identity of the AP itself, the subscription information of the UE and the AP is obtained from the database storing the subscription information; the CN judges whether the UE is allowed to receive the subscription information according to the subscription information. Enter the AP, and inform the AP of the judgment result;

The AP is configured to send an initial message to the CN after establishing a connection with the UE, informing the CN to judge whether the UE is allowed to access the AP. the

Wherein, the network side equipment in the system provided by this embodiment can also be implemented by other equipment except CN,

In addition, in the embodiment of the present invention, the network side equipment is separately protected as a device for controlling access to private base stations, and the device includes:

The storage unit is used to save the relevant subscription information of the UE and the AP. For the content included in the subscription information, please refer to Table 1 and Table 2;

The judging unit is configured to, after receiving the initial message sent by the AP, obtain the subscription information of the UE and the AP from the database storing the subscription information according to the UE identifier and the AP's own identifier, and judge the UE according to the subscription information to obtain the subscription information. Whether it is allowed to access the AP, and inform the AP of the judgment result. the

In the above description, it is used by the CN to detect whether the UE is allowed to access the AP. In the third preferred embodiment (1) of the present invention, the above-mentioned determination of whether to allow access can also be performed on the AP side. By judging on the AP side, the load on the CN side and the signaling load between the AP and the CN can be reduced, and the judgment process can be accelerated. Especially for UEs that continuously initiate access services in the AP, the processing speed can be significantly improved. In this case, some information on the CN side needs to be transmitted through the Iu interface, so that the AP can decide how to handle the call or handover of the UE. Refer to Table 7 for the content transmitted by the Iu interface.

Table 7

Among them, List of Cell Identities or List of AP identities is a list of cells or APs that UE is allowed to access, which can be stored in CN or AP. The information is sent to the macro cell or AP. If it is sent to the macro cell, it can assist the macro cell to handover the UE in it to the corresponding AP/Cell where the UE can go; if it is sent to the AP, it can assist in the handover between APs and APs. the

Based on the content in Table 7 above, the AP can detect whether the UE is allowed to access without the participation of the CN. The AP stores some subscription information (such as IMSI, TMSI, P-TMSI, etc.) of UEs that are allowed to access. If it is a UE that is not allowed to access, direct RRC relocation to the macro cell, including:

(1) First, the UE sends an RRC connection request to the AP;

(2) According to the UE identifier (IMSI or TMSI, PTMSI, etc.) in the RRC request message, the AP compares the UE subscription information saved by itself to check whether the UE currently requesting access is a UE that is allowed to access. The connected UE completes the normal access process. If it is not a UE that is allowed to access, go to (3);

(3) Directly relocate the UE to an adjacent macro cell through RRC, wherein the relocation is an existing procedure. the

For the preferred embodiment three (1), the embodiment of the present invention provides a corresponding control device for accessing a private base station, which can be implemented using an AP, and the device includes:

The receiving unit is used to receive the connection request sent by the UE;

The judging unit is used to compare the UE subscription information saved by the device itself according to the UE identifier (IMSI or TMSI, PTMSI, etc.) in the connection request, and check whether the UE currently requesting access is a UE that is allowed to access;

Notification unit: for notifying the UE of the judgment result of the judging unit. the

Wherein, in a preferred embodiment of the present invention, the control device for accessing a private base station may further include a relocation unit, configured to relocate the UE to Adjacent macrocells. the

The above control methods are respectively aimed at the search period and whether the AP allows the UE to access. Next, the access control when accessing the private base station is combined with whether the AP is in the out-of-service (OOS) or in-service (IS) state. The method is described in detail:

Embodiment five:

First, introduce the OOS and IS states respectively:

Referring to the scenario shown in Figure 10, when the AP is within the service coverage of the macro cell, the AP is in the IS state; when part of the AP is within the service coverage of the macro cell and part of the AP is not within the service coverage of the macro cell, The AP is in the IS state/OOS state; when the AP is not within the coverage of the macro cell service, the AP is in the OOS state;

More specifically, in practical applications, there are two kinds of macro cell coverage, UMTS and GSM. Correspondingly, the AP can also support UMTS or GSM, or even support both UMTS and GSM modes. For this situation, refer to the figure 11 In the embodiment of the present invention, the corresponding scene is as follows:

As shown in Figure 11a, the AP is in UMTS mode, and it is not in the coverage of UMTS and GSM macro cells. At this time, the AP is in OOS state for these two macro cells;

As shown in Figure 11b, the AP is in UMTS mode. It is not in the coverage of the UMTS macro cell, but in the coverage of the GSM macro cell. At this time, the AP is in the OOS state for the UMTS macro cell, but for the GSM macro cell The cell is in the IS state;

For the above scenario, see Figure 12. In the embodiment of the present invention, the access control method includes the following steps:

Step 1201: judge the current state of the AP; wherein, specifically, it is to judge whether the AP is in the OOS state, the IS state, or the OOS/IS state; more specifically, the state of the AP can be judged respectively for different types of macro cells , such as the situation shown in Figure 11a and Figure 11b;

Step 1202: If it is judged that the AP is currently in the OOS state, then assign a separate routing area code (LAC) or routing area code (RAC) to the AP; wherein, the purpose of assigning a separate identifier is to make the AP different from other APs. Shared identity, so as to avoid that when the current AP rejects UE access, the AP that shares the identity with this AP also rejects UE access by mistake; in addition, by assigning a separate LAC or RAC to the AP, the AP does not allow UE In the case of access, it is convenient to reject the access of the UE with reasons such as "LA not allowed" and "ROAMING NOT ALLOWED". At this time, the UE can only make limited services such as emergency calls, which may display information for the user to see, such as "Restricted business, emergency only," prompting the user to call elsewhere. Otherwise, there is no other good reason to deny UE access, and the user will not understand why his UE cannot access the AP when receiving a good signal. the

Step 1203: When the UE requests to access the AP, if it is determined that the UE is not allowed to access the AP, then according to the state of the AP itself, prompt the UE for the reason for the service restriction or switch the UE to the corresponding AP. district. For the scenario shown in Figure 11b, the specific implementation of step 1203 is as follows, wherein the AP has been assigned a separate RAC:

If the UE only supports UMTS mode, when the AP does not allow the UE to access, return information such as "LA not allowed" to the UE, so that the UE can display information such as "service is limited, emergency only" to the UE user;

If the UE supports UMTS mode and GSM mode, when the AP does not allow the UE to access, the AP has two solutions:

Method 1: Return information such as "LA not allowed" to the UE, so that the UE can display information such as "service limited, emergency only" to the user;

Method 2: Allow the UE to camp on the AP, and handover the UE to the GSM macro cell when the UE tries to obtain services from the AP. the

Wherein, the above step 1201 can be implemented in the following manner:

Install a detection device similar to a terminal that has the ability to receive signals from other base stations for the AP, so that by using this device, the AP can find out whether it is in a certain RAT public Macro Cell of OOS or IS. the

Alternatively, it is also possible to determine whether the AP is in the OOS state or the IS state by indirectly testing neighboring cells through intra-frequency, inter-frequency or inter-radio technology measurements by a terminal in an active state in the private base station. the

For the description of the above process, in actual application, there are two processing methods:

1. The processing method of the AP reporting instructions to the CN: the AP needs to send the service status information of the AP (see Table 7) to the CN on the Iu interface (or the interface between the AP and the CN), that is, often (when the When there is a change), you need to tell the CN and the network management so that the network management can allocate or recycle the LAC/RAC to the AP in time, and the current status of the AP (IS/OOS, IS or OOS). Then the CN can give the UE an appropriate treatment according to the information reported by the AP: handover to the adjacent macro cell, or directly reject the UE's access (when the AP is in the OOS state). the

2. AP-centered processing method: the AP obtains the subscription information of the UE and the AP from the CN—through the Iu interface (or the interface between the AP and the CN). The AP directly decides whether the UE should be handed over to an adjacent macro cell, or directly rejects the UE's access for some reason (when the AP is OOS)—so that only emergency call services can be accepted. the

For the method provided in Embodiment 5 of the present invention, the embodiment of the present invention also provides a corresponding control device for accessing a private base station, which can be implemented by network-side equipment. In the embodiment of the present invention, the network-side device is CN, The CN further includes:

A state judging unit is used to judge whether the AP is currently in the OOS state;

An identifier allocation unit is used for distributing a separate routing area identifier for the AP after the state judgment unit judges that the AP is currently in the OOS state;

The error reason prompting unit is used for prompting the UE of the reason for service restriction according to the state of the AP itself after the AP judges that the UE is not allowed to access. the

In a preferred embodiment of the present invention, the apparatus may further include a switching unit, configured to switch the UE to a corresponding cell after the AP determines that the UE is not allowed to access. the

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (34)

1. A method for controlling access to a private base station, the method comprising:

when user equipment enters a location area RA/routing area LA where a first macro cell is located, the user equipment initiates a location updating request; the first macro cell is adjacent to a cell covered by a private base station allowing the user equipment to access;

after receiving the location updating request, the network side equipment determines to obtain the degree of the user equipment to be far from the private base station which allows the user equipment to access, and adjusts the Public Land Mobile Network (PLMN) search period of the user equipment and informs the user equipment according to the determination result;

and the user equipment searches the PLMN according to the adjusted search period in the access process.

2. The method according to claim 1, wherein said adjusting the PLMN search period of the user equipment according to the determination result is specifically:

determining that the user equipment is within a preset range from a private base station allowing the user equipment to access at present, and shortening the PLMN search period of the user equipment according to the determination result;

or the following steps:

and if the user equipment is determined to be out of the preset range from the private base station which allows the user equipment to access at present, the PLMN search period of the user equipment is lengthened according to the determination result.

3. The method according to claim 1, wherein the network-side device determines the distance as: and determining according to whether the RA/LA of the macro cell where the user equipment is currently located is close to or overlapped with the RA/LA of the macro cell adjacent to the private base station.

4. The method of claim 1, wherein the network side device notifies the adjusted PLMN search period to the user equipment in a data downloading manner.

5. The method according to any one of claims 1 to 4, wherein the network side device is a core network device, and the private base station is an Access Point (AP) or an indoor base station (hNB).

6. A control system for accessing a private base station, the system comprising: network side equipment and user equipment UE, wherein:

the user equipment is used for initiating a location updating request when entering a location area RA/routing area LA where a first macro cell is located, and performing PLMN search according to a public land mobile network PLMN search period sent by network side equipment; wherein the first macro cell is adjacent to a cell covered by a private base station allowing the UE to access;

and the network side equipment is used for determining and obtaining the current distance condition of the user equipment from a private base station allowing the user equipment to access after receiving the position updating request, adjusting the PLMN searching period of the user equipment according to the determination result and informing the user equipment of corresponding adjustment.

7. The system according to claim 6, wherein the network side device is a core network device, and the private base station is an access point AP or an indoor base station hNB.

8. A control apparatus for accessing a private base station, the apparatus comprising:

a receiving unit, configured to receive a location update request sent by a user equipment;

a determining unit, configured to determine to obtain a current distance between the ue and a private base station to which the ue is allowed to access;

an adjusting unit, configured to adjust a public land mobile network PLMN search period of the user equipment according to the determination result of the determining unit;

and the notification unit is used for notifying the user equipment of the adjusted PLMN search period.

9. A control method for accessing a private base station is characterized in that related subscription information of user equipment and the private base station is stored on network side equipment, and the method comprises the following steps:

after the private base station or the macro cell establishes connection with the user equipment, the network side equipment receives a message sent by the private base station; wherein, the message carries the identifier of the user equipment and the identifier of the private base station;

the network side equipment obtains the subscription information of the user equipment and the private base station from a database for storing the subscription information according to the user equipment identification and the identification of the private base station;

and the network side equipment judges whether the user equipment is allowed to access the private base station or not according to the subscription information and informs the private base station of the judgment result.

10. The method according to claim 9, wherein the network side device determines, according to the subscription information, that the user equipment is not allowed to access the private base station, and then the network side device informs the private base station that the user equipment is not allowed to access;

the method further comprises the following steps: after the private base station learns that the user equipment is not allowed to be accessed, the private base station further switches the user equipment to an adjacent macro cell or other public private base stations allowing the user equipment to be accessed through blind switching;

or,

after the private base station and the user equipment establish connection, the method further comprises: the private base station requires the user equipment to measure other surrounding carrier frequencies or other wireless access technologies; and after the private base station learns that the user equipment is not allowed to be accessed, the private base station further switches the user equipment to an adjacent macro cell or the private base station allowed to be accessed through a normal switching process according to the measurement result.

11. The method according to claim 9, wherein the ue is in a macro cell, and when the ue is close to a private base station allowing its access, and the private base station is in a coverage of the macro cell, the connection between the private base station or the macro cell and the ue is specifically: establishing connection between the macro cell and user equipment;

the network side device judges that the user device is not allowed to access the private base station according to the subscription information, and then the network side device informs the private base station that the user device is not allowed to access, and the method further comprises the following steps:

and the macro cell switches the user equipment to the private base station allowing access.

12. The method of claim 11, wherein the macro cell is implemented to handover the ue to the private base station allowed to access:

the macro cell sends measurement control information to the user equipment, wherein the measurement control information comprises information of a private base station which is allowed to be accessed and close to the user equipment;

the macro cell finds that the private base station allowing access is a handover candidate cell, and sends a relocation request to network side equipment when confirming that the private base station allows the user equipment to access;

the network side equipment sends a relocation request to the private base station which allows access;

the private base station prepares wireless resources for the user equipment, and sends a relocation request confirmation to the network side equipment after the private base station is prepared;

the network side equipment sends a relocation command to the macro cell;

the macro cell sends physical channel reconfiguration to the user equipment;

and the user equipment is switched to the private base station which allows the access.

13. The method according to claim 9, wherein the network side device determines, according to the subscription information, that the user equipment is not allowed to access the private base station, and then the network side device informs the private base station that the user equipment is not allowed to access;

if there is a public private base station in the current macro cell, the method further comprises:

and the macro cell switches the user equipment to a public private base station.

14. The method of claim 13, wherein the macro cell handover of the ue to a public private base station is implemented by:

the macro cell informs public private base station information near the user equipment;

the macro cell filters out a public private base station allowing the user equipment to access, sends switching measurement control to the user equipment, and the user equipment sends a measurement report to the macro cell;

the macro cell finds that the public private base station is a proper handover candidate cell, and sends a relocation request to network side equipment when confirming that the private base station allows the user equipment to access;

the network side equipment sends a relocation request to the public private base station;

the private base station prepares wireless resources for the user equipment, and sends a relocation request confirmation to the network side equipment after the private base station is prepared;

the network side equipment sends a relocation command to the macro cell;

the macro cell sends physical channel reconfiguration to the user equipment;

and the user equipment is switched to the public private base station.

15. The method of claim 9, wherein:

the network side device judges that the user device is not allowed to access the private base station according to the subscription information, and then the network side device informs the private base station that the user device is not allowed to access, and the network side device informs the private base station of the judgment result:

the network side equipment informs the private base station of the judgment result of access rejection through the direct transfer message, and the judgment result of access rejection is carried in the access check result of the direct transfer message.

16. The method of claim 15, wherein a reject cause for indicating that access is rejected due to access check failure is further added to the direct transfer message.

17. The method according to any one of claims 9 to 16, wherein an identifier of the private base station is added to a message sent by the private base station to notify the network side device to perform the determination.

18. The method according to any one of claims 9 to 16, wherein the network side device is a core network device CN, and the private base station is an access point AP or an indoor base station hNB.

19. A control system for accessing a private base station, the system comprising: network side equipment, private base station, wherein:

the network side device is configured to:

storing the related subscription information of the user equipment and the private base station; and,

after receiving the message sent by the private base station, acquiring the subscription information of the user equipment and the private base station from a database for storing the subscription information according to the user equipment identification and the identification of the private base station, judging whether the user equipment is allowed to access the private base station according to the subscription information, and informing the private base station of the judgment result;

the private base station is configured to: after establishing connection with the user equipment, sending a message to network side equipment, and informing the network side equipment to judge whether the user equipment is allowed to access the private base station; and determining whether to access the user terminal to the base station according to the received judgment result.

20. The system according to claim 19, wherein the network side device is a core network device, and the private base station is an access point or an indoor base station hNB.

21. A control apparatus for accessing a private base station, the apparatus comprising:

the storage unit is used for storing the related subscription information of the user equipment and the private base station;

and the judging unit is used for acquiring the subscription information of the user equipment and the private base station from the storage unit according to the user equipment identification and the identification of the private base station after receiving the message sent by the private base station, judging whether the user equipment is allowed to access the private base station according to the subscription information, and informing the private base station of the judgment result.

22. A method for controlling access to a private base station, the method comprising:

the user equipment sends a connection request to the private base station;

and the private base station judges whether the user equipment which is requested to be accessed currently is the user equipment which is allowed to be accessed or not by comparing the subscription information of the user equipment stored by the private base station according to the user equipment identification in the request message, and controls the access of the user equipment according to the judgment result.

23. The method of claim 22, wherein if it is determined that the ue currently requesting access is not a ue allowed to access, the method further comprises:

relocating the user equipment directly to a neighboring macro cell.

24. The method according to claim 22 or 23, wherein the network side device is a core network device, and the private base station is an access point or an indoor base station hNB.

25. A control apparatus for accessing a private base station, the apparatus comprising:

a receiving unit, configured to receive a connection request sent by a user equipment;

a judging unit, configured to compare subscription information of the user equipment stored in the apparatus itself according to the user equipment identifier in the connection request, and check whether the user equipment currently requesting access is a user equipment allowed to be accessed;

and the notification unit is used for notifying the user equipment of the judgment result of the judgment unit.

26. The apparatus of claim 25, further comprising:

and the relocation unit is used for relocating the user equipment to the adjacent macro cell under the condition that the judgment unit judges that the user equipment is the user equipment which does not allow access.

27. A control method for accessing a private base station IS characterized in that whether the current state of the private base station IS in a state of OOS which IS not located in a service coverage area or in a state of IS which IS located in the service coverage area or in an IS/OOS state of partial IS and partial OOS IS judged, and when the current state of the private base station IS judged to be in the OOS state, a single location area code LAC or a single routing area code RAC IS distributed to the private base station; the method comprises the following steps:

when the user equipment requests to access the private base station, if the user equipment is judged not to be allowed to access the private base station, prompting the reason of limited service to the user equipment or switching the user equipment to a corresponding cell according to the state of the private base station.

28. The method of claim 27, wherein:

the private base station judges the current state, and sends the state information of the state to the network side equipment through an interface between the private base station and the network side equipment;

the specific implementation of prompting the user equipment of the reason of limited service or switching the user equipment to a corresponding cell is as follows:

and the network side equipment prompts the reason of limited service to the user equipment or switches the user equipment to a corresponding cell according to the state of the private base station.

29. The method of claim 27, wherein the prompting the ue for the reason for limited service or the switching the ue to the corresponding cell is implemented as:

and the private base station prompts the reason of limited service to the user equipment or switches the user equipment to a corresponding cell according to the state of the private base station.

30. The method according to claim 27, wherein the determining whether the current state of the private base station IS an OOS state, an IS/OOS state, or an IS state specifically comprises:

and respectively judging the states of the private base stations aiming at different types of macro cells.

31. The method according to any one of claims 27 to 30, wherein the network side device is a core network device, and the private base station is an access point or an indoor base station hNB.

32. A control apparatus for accessing a private base station, the apparatus comprising:

the state judging unit is used for judging whether the private base station is in an OOS state which is not positioned in a service coverage area currently;

the identification distribution unit is used for distributing an individual routing area identification for the private base station after the state judgment unit judges that the private base station is currently in the OOS state;

and the error reason prompting unit is used for prompting the reason of limited service to the user equipment according to the state of the private base station after the private base station judges that the user equipment is not allowed to be accessed.

33. The apparatus of claim 32, further comprising a handover unit, configured to handover the ue to the corresponding cell after the private base station determines that the ue is not allowed to access.

34. The apparatus according to claim 32 or 33, wherein the network side device is a core network device, and the private base station is an access point or indoor hNB.

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