WO2011044812A1 - Method and system for accessing home nodeb by user equipment - Google Patents

Abstract

A method and system for accessing a Home NodeB by a user equipment are disclosed in the present invention. When the user equipment moves into a service area of a restricted Home NodeB by which it is not authorized, the above-mentioned method includes that: the user equipment learns through detection that the Home NodeB to which the service area, into which it moves, belongs is a restricted Home NodeB (S501); the user equipment sends a message to a core network, wherein the message carries the current location information of the user equipment (S503); the user equipment receives a paging request initiated by the core network and sets up the connection with the restricted Home NodeB, wherein the paging request is initiated through a Home NodeB subsystem corresponding to the location information when the core network obtains downlink data that needs to be sent to the user equipment (S505). According to the technical solution provided by the present invention, the above-mentioned user equipment can be effectively paged, thus making the communication successful and avoiding the waste of paging resource effectively.

Description

 TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and system for a user equipment to access a home base station. BACKGROUND OF THE INVENTION A home base station is a small, low-power base station deployed in indoor places such as homes and offices. The main function is to provide users with higher service rates and reduce the cost of using high-speed services. There is a shortage of coverage of distributed cellular wireless communication systems. The advantages of home base stations are as follows: affordable, convenient, low power output, plug and play, broadband access, use of single mode terminals, etc. Home base stations can be used in the third generation (3 Generation, 3G for short) or long-term evolution

(Long Term Evolution, LTE for short) in mobile communication networks. When the home base station is used in the 3G network, it is simply referred to as Home Node B (HNB); when the home base station is used in the LTE network, it is simply referred to as Home Evolved Node B (Home Evolved Node B, referred to as HeNB). In order to facilitate the management of the home base station, a new network element, that is, a home base station gateway, is introduced in the radio access network. The home base station gateway mainly performs the following functions: - security of the home base station of the insurance license; processing of the registration of the home base station; operation and maintenance management of the home base station; configuration and control of the home base station according to the operator's requirements; and exchange of data of the core network and the home base station Wait. FIG. 1 is a network architecture diagram of a 3G home base station. As shown in FIG. 1, a 3G home base station (HNB) is connected to a home base station gateway (HNB GW) through a newly defined Iuh interface, and the home base station gateway provides a core network packet i or a circuit. i or IuPS and IuCs interface. For the 3G network, the home base station gateway is mandatory. It is used to shield the user equipment (User Equipment, UE for short) and the network side after the home base station is introduced. The packet domain in FIG. 1 includes: a Service GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN). For the LTE network, the home base station gateway is optional. Therefore, the LTE home base station and the core network are connected in two ways. One is that the home base station and the core network element are directly connected. For details, refer to FIG. 2 . The other is that the home base station is connected to the core network element through the gateway. For details, refer to FIG. 3. In the scenario of the home base station gateway shown in FIG. 3, the home base station gateway may not integrate the user plane function, and the user plane is directly established between the home base station and the core network user plane gateway, thereby flattening the user plane and reducing the data transmission delay. For details, see Figure 4. The core network gateways in FIG. 2, 3, and 4 (also referred to as user plane gateways, that is, the system architecture evolution gateway (SAE-GW)) include: a guest gateway (Serving Gateway) The S-GW and the Packet Data Network Gateway (P-GW) „ Closed Subscriber Group (CSG) is the 4 words introduced after the introduction of the home base station. Usually, a family Or an internal user of the enterprise forms a closed user group, and the closed user group is identified by the CSG ID. The home base station serving the users in the closed user group has the same CSG ID. The user can access the company by signing with the operator. A home base station corresponding to a plurality of closed user groups, for example, a user's office, a home, etc. Therefore, a concept of allowing a closed user group list is introduced. The above list is stored in a user equipment (User Equipment, UE for short) and a network side. In the home subscriber data server, where the LTE network, the home subscriber data server on the network side is Home Subscriber Server (HSS); for the 3G network, the home subscriber data server on the network side is the Home Location Register (HLR). The UE mainly uses the above list to select the wireless cell. The base station will notify the UE of the CSG ID and the usage mode to which the UE belongs by broadcasting. After the UE obtains the broadcast message, if the base station is found to be in the closed usage mode, and the CSG ID is not in the allowed closed user group list saved by itself, then The UE considers that the home base station cell is not suitable for access, and automatically selects other cells suitable for access. In this way, the UE can avoid frequent access attempts and reduce battery and air interface resource consumption. At the same time, the home subscriber data server on the network side sends the subscriber-bound closed subscriber group list to the mobility management unit of the core network, and the mobility management unit of the core network uses the above list to perform access control on the UE. 3G network, mobility management unit is SGSN; In the LTE network, the mobility management unit is a Mobility Management Entity (abbreviated as ΜΜΕ). If the UE accesses the core network through the closed mode home base station that is not authorized, the core network rejects access of the UE. The home base station can also be used as a normal base station, and the access mode of the home base station is an OPEN mode. In this mode, the home base station can be accessed by any UE, and the mobility management unit does not need to perform access control on the accessed UE. Similarly, the home base station can have a hybrid mode, access to a part of the UE in closed mode, and an open mode for a part of the UE. When the UE is in an idle state, the air interface connection between the UE and the base station is released. If external data needs to be sent to the UE through the network, the MME/SGSN needs to notify the base station in the tracking list (TA List) where the UE is currently located. The UE is paged to notify the UE to establish an air interface connection; when there is a home base station gateway, the MME/SGSN needs to notify the home base station gateway, and the home base station gateway notifies the base station to page the UE. According to different network architectures, when the MME is directly connected to the home base station, the MME knows the access mode of the home base station; when the MME/SGSN connects to the home base station through the home base station gateway, the MME/SGSN does not know the access mode of the home base station. Only the home base station gateway knows the access mode of the home base station. In the scenario that the home base station is directly connected to the MME, in order to reduce the waste of resources caused by paging, paging optimization may be adopted, that is, for the closed mode home base station, it is not required to notify the paging unauthorized UE; Such a base station, whose cell is a closed mode CSG cell, and the UE does not have a CSG subscription of the CSG cell; herein, the foregoing base station is referred to as a closed mode home base station that does not authorize the UE, and may also be referred to as the user access access. Limited home base station. When the home base station connects to the MME/SGSN through the home base station gateway (HeNB GW/HNB GW), the MME/SGSN sends a 4 bar paging message to the home base station gateway, where the paging message includes the UE's allowed closed user group list. The home base station gateway decides to use paging optimization, that is, for the closed mode home base station, there is no need to notify the UE that the paging is not authorized. In the related art, the user who uses the emergency service can access the home base station that provides the emergency service. The following scenario occurs. The UE normally attaches to the network under the normal serving base station, and then establishes an emergency service. After the emergency service is completed, The UE enters an idle state. At this time, the UE moves and moves to another closed home base station. The CSG ID of the home base station is not in the allowed closed subscriber group list of the UE, but the home base station indicates in the broadcast message. Providing emergency services, so the UE chooses to camp on the CSG CelL. In the above scenario, the UE with emergency services can camp on an unauthorized closed mode home base station, according to the paging optimization method in the related art, MME/SGSN or home. The base station gateway (HeNB GW/HNB GW) will not notify the home base station to page the UE, so it will result in the inability to page to the UE, causing communication failure. In addition, if paging optimization is not used, the network will page users within the TA list (tracking area list) or RA list (routing area list) that the user is currently registered in the network, resulting in waves of paging resources. Fee. Further, when the user has both emergency and non-emergency services, the downlink data may be non-emergency service data, causing the network to page the UE. At this time, even if the UE is paged and connected to the network, the MME finds that the user is currently located. The restricted area will therefore deactivate the non-emergency service, and thus the paging resources described above are also wasted. SUMMARY OF THE INVENTION In view of the related art, when a user equipment accesses a limited home base station, the present invention is proposed because the user equipment cannot be paged, causing communication failure, or paging resources are wasted. The main purpose is to provide an improved method and system for accessing a user equipment to a home base station to solve at least one of the above problems. According to an aspect of the present invention, a method for a user equipment to access a home base station is provided. The method for the user equipment to access the home base station according to the present invention includes: the user equipment detects that the home base station to which the service area to which the mobile service belongs belongs to the restricted home base station; the user equipment sends a message to the core network, where the message carries the user equipment Current location information; the user equipment receives a paging request initiated by the core network, and establishes a connection with the restricted home base station, where the paging request is obtained by the location information corresponding to the downlink data that the core network needs to send to the user equipment. Initiated by the home base station subsystem. According to another aspect of the present invention, a system in which a user equipment accesses a home base station is provided. The system for accessing a home base station by a user equipment according to the present invention includes: a user equipment, configured to detect, by detecting, a message that it moves to a restricted home base station that does not authorize the user equipment, and send a message to the core network, where the message carries The current location information of the user equipment; the core network, configured to initiate a paging request to the home base station subsystem corresponding to the location information when acquiring downlink data that needs to be sent to the user equipment; and the home base station subsystem, configured to The device sends a paging request. According to still another aspect of the present invention, a method for processing downlink service data is provided. The method includes: receiving, by a core network gateway (SGW or PGW, or GGSN), downlink service data of a user equipment, and sending a downlink to the mobility management unit. a downlink data notification message (DDN), where the downlink data notification message carries indication information indicating whether the downlink service data is high priority data; a mobility management unit (MME/SGSN) according to the The indication information determines whether the downlink service data has a high priority and controls paging. According to still another aspect of the present invention, a processing system for downlink service data is further provided, The system includes: a core network gateway (SGW/PGW, or GGSN), configured to send a downlink data notification message to the mobility management unit (MME or SGSN) when receiving the downlink service data of the user equipment, where the downlink data notification message And indicating, by the mobility management unit, whether the downlink service data has a high priority according to the indication information carried in the downlink data notification message. And control paging. With the present invention, when the UE moves to a restricted home base station that does not authorize the user equipment, the UE needs to immediately notify the network where the current UE is located, and the network saves the location. When the network receives downlink data that needs to be sent to the user, the network pages the user at the above location. When the user equipment accesses the limited home base station, the communication fails due to the failure to page the UE, or the paging resource is wasted, so that the UE can be effectively paged to make the communication successful and effective. Avoid paging resources being wasted. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a system architecture diagram including a home base station in a 3G network; FIG. 2 is a system architecture diagram including a home base station in an LTE network; FIG. 3 is a system architecture diagram including a home base station in an LTE network; 4 is a system architecture diagram of a home base station in an LTE network; FIG. 5 is a flowchart of a method for a user equipment to access a home base station according to an embodiment of the present invention; FIG. 6 is a user equipment accessing a home base station according to an example 1 of the present invention; FIG. 7 is a flowchart of a method for a user equipment to access a home base station according to Example 2 of the present invention; FIG. 8 is a flowchart of a method for a user equipment to access a home base station according to Example 3 of the present invention; 9 is a flowchart of a method for a user equipment to access a home base station according to Example 4 of the present invention; FIG. 10 is a flowchart of a user equipment accessing a home base station according to Embodiment 5 of the present invention; FIG. 11 is a flowchart according to an embodiment of the present invention. FIG. 12 is a structural block diagram of a user equipment accessing a home base station according to a preferred embodiment of the present invention; FIG. The embodiments of the present invention provide a scheme for a user equipment to access a home base station, where the UE with the emergency service moves to the closed mode home base station that is not authorized to the UE, and the UE needs to immediately notify the current UE of the core network. Location, core network save location; UE notification mode can be location update (TAU/RAU), or normal service packet data network (Packet Data Network, PDN for short) connection interruption request or normal service packet data protocol ( Packet Data Protocol (PDP) context release request. When the core network receives the downlink data that needs to be sent to the user, the core network pages the user at the above location. When the home base station is located in the LTE core network, the foregoing message is a Tracking Area Update, and/or a normal service PDN connection release request, where the location is a tracking area and/or a CSG cell; when the home base station is located at 3G In the core network, the above message is a Routing Area Update, and/or a normal service PDP context release request, and the above location is a routing area and/or a CSG cell. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. According to an embodiment of the present invention, a method for a user equipment to access a home base station is first provided. FIG. 5 is a flowchart of a method for a user equipment to access a home base station according to an embodiment of the present invention. As shown

As shown in FIG. 5, when the user equipment moves to the service area of the restricted home base station that is not authorized for the user equipment, the method mainly includes the following processing (step 4 S501-step 4 gathers S505): Step S501: the user equipment passes the detection Obtaining that the home base station to which the service area to which the mobile service belongs belongs to the restricted home base station; Step 4: S503: The user equipment sends a message to the core network, where the message carries the current location information of the user equipment; The above request is when the home base station is located in the Long Term Evolution (LTE) network. The message includes at least one of the following: a tracking area update request message, a normal service PDN connection release request. The location information includes at least one of the following: a tracking area identification information, and CSG cell identification information. Preferably, when the restricted home base station is located in the third generation 3G network, the request message includes at least one of the following: a routing area update request message, a normal service PDP context release request; and the location information includes at least one of the following: Routing area identification information, CSG cell identification information. Preferably, the user equipment sends a message to the core network in the following manner, where the manner mainly includes the following processing:

(1) The user equipment sends a request message to the home base station subsystem;

(2) The home base station subsystem receives the request message and sends a message including the location information and the request message to the core network. Preferably, before performing step S505, the following processing may also be included: The core network deletes the current normal service of the user equipment. Preferably, before performing step S505, the following processing may also be included:

(1) The core network determines that the downlink data is emergency service data; when the core network determines that the downlink data is high priority service (such as emergency service) data, priority is given, for example, paging is initiated and the paging priority is carried.

(2) The core network initiates a paging request through the home base station subsystem corresponding to the location information. Preferably, when the core network determines that the downlink data is non-emergency service data, the data will not be prioritized. For example, the process may be terminated, that is, the core network no longer initiates a paging request by using the home base station subsystem corresponding to the location information. Step S505: The user equipment receives the paging request initiated by the core network, and establishes a connection with the restricted home base station, where the paging request is the location information of the user equipment when the downlink network acquires the downlink data that needs to be sent to the user equipment. Corresponding to the home base station subsystem initiated. According to the foregoing solution provided by the embodiment of the present invention, the embodiment of the present invention further provides a method for processing downlink service data, where the method includes the following steps: Step 1: The core network gateway (SGW/PGW, or GGSN) receives the user. Downstream service data of the device, sending a downlink data notification message to the mobility management unit (Downlink Data) Notification, referred to as DDN for short, the downlink data notification message carries the indication information indicating whether the downlink service data is high priority data; for example, the indication information may be a bearer ID, and the identifier may be Indicates whether the bearer to which the downlink service data belongs is a high-priority service; or the indication information may also be an Allocation and Retention Priority (ARP), and the indication information may indicate the priority of the downlink service data. level. Step 2: The mobility management unit (MME/SGSN) determines whether the downlink service data has a high priority according to the indication information, and if yes, preferentially processes the downlink service data. For example, if the indication information is a bearer identifier, the MME/SGSN carries the identifier to determine the bearer to which the current data belongs, and preferentially processes the data when the bearer is an emergency bearer; if the indication information is an allocation hold priority, the MME/SGSN The priority of the current data is determined according to the allocation retention priority. If the priority of the data is high, that is, the service to which the data belongs is a high priority service (for example, emergency service), the priority is processed. Among them, emergency services are high priority services. FIG. 6 is a flowchart of a method for a user equipment to access a home base station according to an example 1 of the present invention. The restricted home base station is located in the LTE network. As shown in FIG. 6, the method includes the following processing (step S601 - step S613): Step S 601: The UE moves to the closed mode home base station that does not authorize the UE, when accessing When the network is EUTRAN, the UE sends a Trace Area Update Request (TAU) to the MME through the home base station subsystem (which may be HeNB, or HeNB and HeNB GW). When the TAU passes through the home base station subsystem, the home base station subsystem will be the home base station. The cell identifier (CELL ID) and the closed mode are sent to the MME together with the TAU. Step S603: The MME checks the user subscription information, and finds that the home base station is a closed mode home base station that is not authorized to the UE, and the current service information of the user is included. Emergency business, that is, there is an emergency ΑΡΝ corresponding load. The MME records the current location information of the user, which may be the current TA/RA or the current home base station CELL ID, and replies to the user TAU ACCEPT (TAU accept); Step S605: When the user has normal service, the mobility management unit MME Initiating deletion of the normal service of the user saved on the core network gateway (P-GW/S-GW); Step S607: The core network gateway P-GW/S-GW receives the downlink data sent to the UE; Step S609: The core network gateway sends a downlink data notification to the mobility management unit to notify the MME that the downlink data arrives and needs to be sent to the UE. Step S611: The mobility management entity sends the user location information (CELL ID) saved to the location. The home base station subsystem sends a paging message. Step S613: After receiving the paging message, the UE initiates a service request procedure, establishes an air interface connection with the network, and receives emergency service downlink data sent by the core network gateway. FIG. 7 is a flowchart of a method for a user equipment to access a home base station according to Example 2 of the present invention. The restricted home base station is located in the LTE network. As shown in FIG. 7, the method includes the following processing (step S701 - step S713): Step S701: the UE detects that the current CSG CELL is not in the white list saved by itself, and the The CSG CELL is in a closed mode. In order to maintain an emergency call, the UE under the LTE coverage sends a PDN connection interruption request to the network, where the request includes the APN corresponding to the connected normal PDN service, requesting the network to interrupt its normal PDN connection; 3G The covered UE sends a PDP context release request to the network, and the APN corresponding to the normal service that has been connected requests the network to interrupt the PDP context of its normal service. The home base station subsystem also sends the CELL ID of the home base station where the user is currently located, and the CSG CELL sends the closed mode information together with the PDN connection interruption request to the mobility management entity (MME), and the MME stores the location information, and the location information The SELL can be the CELL ID information of the home base station. Step S703: The mobility management entity initiates the deletion process of the normal service PDN connection to the core network gateway, and completes deleting the normal service in the core network. Step S705: The mobility management entity sends a PDN connection. The interrupt is replied to the UE, and the deletion of the PDN connection is completed. Preferably, when there are multiple normal service PDN connections in the UE, the above step S701-step S705 needs to be performed once for each normal service PDN connection interruption; Step S707: Core network gateway The P-GW/S-GW receives the downlink data sent to the UE. Step S709: The core network gateway sends a downlink data notification to the mobility management entity to notify the MME that the downlink data arrives and needs to be sent to the UE. Step S711: The mobility management entity According to the user location information (CELL ID) saved by itself, Sending a paging message to the home base station subsystem in the above location; Step S713: After receiving the paging message, the UE initiates a service request procedure, establishes an air interface connection with the network, and receives emergency service downlink data sent by the core network gateway. FIG. 8 is a flowchart of a method for a user equipment to access a home base station according to Example 3 of the present invention. The restricted home base station is located in the 3G network. As shown in FIG. 8, the method includes the following processing (step S801 - step S813): Step S 801: The UE moves to the closed mode home base station that does not authorize the UE, when accessing When the network is UTRAN, the UE sends a routing area update request message to the SGSN through the home base station subsystem (including the HNB and the HNB GW). When the RAU passes through the home base station subsystem, the home base station subsystem sets the CELL ID and the TA ID (TA identifier). /RA ID (RA identifier) and the current CSG CELL CSG ID and the CSG are in closed mode, and are sent to the SGSN together with the RAU; Step S803: The SGSN checks the user subscription information, and finds that the home base station is in the closed mode of the UE. In the home base station, there is an emergency service in the current service information of the user, that is, an emergency ARP (Allocation and Retention Priority). The SGSN records the current location information of the user, which may be the current TA/RA, and responds to the user RAU ACCEPT (RAU accept;); Step 4 gathers S805: When the user has normal service, the SGSN initiates the core network gateway (GGSN). The saved user normal service is deleted. Step S807: The core network gateway GGSN receives the downlink data sent to the UE. Step S809: The core network gateway sends a downlink data notification to the SGSN, and the SGSN is notified that the downlink data arrives and needs to be sent to the UE. S811: The SGSN sends a paging message to the home base station subsystem in the foregoing location according to the user location information (TA/RA) saved by itself; Step S813: After receiving the paging, the UE initiates a service request procedure, and establishes an air interface with the network. Connect, receive the emergency service downlink data sent by the core network gateway. 9 is a flowchart of a method for a user equipment to access a home base station according to Example 4 of the present invention; wherein the restricted home base station is located in a 3G network, as shown in FIG. 9, the method includes the following processing (step S901 - step S913): Step S901: The UE detects that the current CSG CELL is not in the white list saved by itself, and the CSG CELL is in the closed mode. In order to maintain the emergency call, the UE under the 3G coverage sends a PDP context release request to the network, where the request includes The APN corresponding to the normal service that has been connected, requests the network to interrupt the PDP context of its normal service. The home base station subsystem also sends the CELL ID, TA ID (TA identity) / RA ID ( RA identity) and the CSG ID and the CSG CELL for the closed mode information to the SGSN together with the PDP context release request. The SGSN saves the foregoing location information, and the location information may be TA/RA information. Step S903: The SGSN initiates the deletion process of the normal service PDP context to the core network gateway, and completes deletion of the normal service in the core network. Step S905: SGSN sends The PDP context release replies to the UE to complete the deletion of the PDP context; preferably, when the UE has multiple normal service PDP contexts, each of the normal Primary PDP context interruptions needs to perform the above steps S901-S905; S907: The core network gateway GGSN receives the downlink data sent to the UE. Step S909: The core network gateway sends a downlink data notification to the SGSN, and notifies the SGSN that the downlink data arrives and needs to be sent to the UE. Step S911: The SGSN saves the user location information according to the user. (TA/RA), sending a paging message to the home base station subsystem at the above location; step S913: the UE receives After the call, initiates a service request procedure, establishing air interface with the network, the core network gateway receives the emergency service sent downlink data. FIG. 10 is a flowchart of receiving downlink data by a user accessing a home base station according to Example 5 of the present invention. As shown in FIG. 10, the method includes the following steps: Step 1001: The core network gateway (PGW/SGW or GGSN) receives downlink data of the user, and the downlink data may be a high priority service (such as an emergency service) or a low priority service. In the step 1002, the core network gateway SGW sends a downlink data notification message to the MME, or the core network gateway GGSN sends a downlink data notification message to the SGSN, where the downlink data notification message carries the indication information: the indication information indicates the The downlink data is a high priority or low priority service; The indication information may be a 7-digit identifier indicating the current data of the MME/SGSN, and the MME/SGSN determines that the current service is a high priority or based on the bearer information, such as QoS (Quality of Service) information. Priority information; the indication information may also be an ARP, which is used to indicate the priority of the current user data. According to the ARP, the MME/SGSN may determine that the current service is a high priority or a prioritized service; when the network resource is limited, the MME/SGSN Priority is given to high-priority services; or when it is judged to be non-emergency, paging optimization is performed; when it is judged as emergency service, paging optimization is not performed, that is, paging stations of all TA lists or RA areas registered by the user, including Closed mode home base station. Step 1003: The MME/SGSN performs paging according to the judgment of step 1002. When the priority indication has a high priority, the MME/SGSN carries a paging priority indication in the paging message. Step 1004, the UE initiates a service request procedure. Receive downlink data. The foregoing embodiment provides a method for a user equipment to access a home base station, which solves the problem that when the user equipment accesses the limited home base station, the communication fails, or the paging resource is wasted because the UE cannot be paged to the UE. The problem is that the UE can be effectively paged to make the communication successful, and the paging resource is effectively avoided. According to an embodiment of the present invention, a system for a user equipment to access a home base station is provided, and the system may be used to implement the foregoing method provided by the embodiments of the present invention. 11 is a structural block diagram of a user equipment accessing a home base station according to an embodiment of the present invention; and FIG. 12 is a structural block diagram of user equipment accessing a home base station according to a preferred embodiment of the present invention. As shown in FIG. 11, the user equipment accessing the home base station according to the embodiment of the present invention includes: a user equipment 1, a core network 2, and a home base station subsystem 3, which are described below in conjunction with FIG. The user equipment 1 is configured to detect, by detecting, information about the mobile home station that is not authorized to the user equipment, and send a message to the core network, where the message carries the current location information of the user equipment; In the case that the downlink data that needs to be sent to the user equipment is obtained, the paging request is initiated to the home base station subsystem corresponding to the location information. Preferably, the core network 2 is further configured to determine that the downlink data is emergency service data. Preferably, the core network 2 can also be used to delete the current normal service of the user equipment. The home base station subsystem 3 is connected between the user equipment 1 and the core network 2, and is configured to send a paging request to the user equipment. Preferably, as shown in FIG. 12, the home base station subsystem 3 may further include: a receiving unit 30 and a sending unit 32, where the receiving unit 30 is configured to receive a request message from the user equipment, and the sending unit 32 is configured to Send a message including location information and request message to the core network. For the working mode of each member in the above system, refer to the description in FIG. 1 to FIG. 9 , and details are not described herein again. Through the above embodiments, a system for a user equipment to access a home base station is provided. Through the combination of the user equipment, the core network, and the home base station subsystem, the UE can be effectively paged to make the communication successful, and the paging resources are effectively avoided. According to an embodiment of the present invention, a processing system for downlink service data is provided, where the system includes: a core network gateway (SGW/PGW, or GGSN), configured to move to the mobile device when receiving downlink service data of the user equipment. The mobility management unit (MME or SGSN) sends a downlink data notification message, where the downlink data notification message carries indication information indicating whether the downlink service data is high priority data, and a mobility management unit, configured to use the foregoing The indication information carried in the downlink data notification message determines whether the downlink service data has a high priority and controls paging. For example, the indication information may be a bearer identifier, and the mobility management unit may determine, according to the bearer identifier, whether the bearer to which the downlink service data belongs is an emergency bearer, and if yes, prioritize the processing; or, the foregoing indication information may also be an ARP, The STP can determine the priority of the downlink service data according to the ARP, and further determine whether the downlink service data belongs to the data of the high priority service and control paging. Through the above system, the core network element can distinguish between a priority service (such as a non-emergency service) or a high priority service (such as an emergency service) according to the service type and/or attribute of the user data, and control paging. In summary, the solution for accessing the user equipment to the home base station by using the foregoing embodiment of the present invention can solve the problem that the MME/SGSN or the home base station gateway (HeNB GW) is used when the paging skill method in the prior art is used. /HNB GW) does not notify the home base station to page the UE, resulting in the inability to page to the UE, causing communication failure. At the same time, it can also solve the problem of not using paging in the prior art. Optimized, the network pages the user within the range of the TA list (tracking area list) or RA list (the routing area list) that the user is currently registered in the network, or when the downlink data is non-emergency service data, the paging resources are wasted. problem. In turn, the UE can be effectively paged to make the communication successful, and the paging resource is effectively avoided. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim A method for a user equipment to access a home base station, the method comprising: when the user equipment moves to a service area of a restricted home base station that is not authorized by the user equipment, the method includes:  The user equipment is a restricted home base station by detecting that the home base station to which the service area to which it moves belongs;  The user equipment sends a message to the core network, where the message carries the current location information of the user equipment;  The user equipment receives a paging request initiated by the core network, and establishes a connection with the restricted home base station, where the paging request acquires downlink data that needs to be sent to the user equipment by the core network. When initiated by the home base station subsystem corresponding to the location information. The method according to claim 1, wherein before the user equipment receives the paging request initiated by the core network, the method further includes:  Determining, by the core network, that the downlink data is emergency service data;  The core network initiates the paging request by using the home base station subsystem corresponding to the location information. The method according to claim 1 or 2, wherein the user equipment sends the message to the core network in the following manner:  Sending, by the user equipment, a request message to the home base station subsystem;  The home base station subsystem receives the request message and transmits the message including the location information and the request message to the core network. 4. The method according to claim 3, wherein when the restricted home base station is located in a long term evolution LTE network,  The request message includes at least one of the following: a track area update request message, a normal service packet data network PDN connection release request; The location information includes at least one of the following: tracking area identification information, closed subscriber group CSG cell identification information. 5. The method according to claim 3, wherein when the restricted home base station is located in a third generation 3G network,  The request message includes at least one of the following: a routing area update request message, a normal service packet data protocol PDP context release request;  The location information includes at least one of the following: routing area identification information, CSG cell identification information. The method according to claim 1 or 2, wherein, before the user equipment receives the paging request initiated by the core network, the method further includes:  The core network deletes the current normal service of the user equipment. A system for a user equipment to access a home base station, the system comprising: a user equipment, configured to detect information about a mobile home station to a restricted home base station that is not authorized by the user equipment, and to the core network Sending a message, where the message carries current location information of the user equipment;  The core network is configured to initiate a paging request to a home base station subsystem corresponding to the location information, if the downlink data that needs to be sent to the user equipment is acquired;  The home base station subsystem is configured to send the paging request to the user equipment. 8. The system of claim 7 wherein:  The core network is further configured to determine that the downlink data is emergency service data. The system according to claim 7, wherein the home base station subsystem comprises: a receiving unit, configured to receive the request message from the user equipment; and a sending unit, configured to include the The location information and the message of the request message are sent to the core network. The system according to any one of claims 7 to 9, characterized in that  The core network is further configured to delete the current normal service of the user equipment. A method for processing downlink service data, comprising: The core network gateway receives the downlink service data of the user equipment, and sends a downlink data notification message to the mobility management unit, where the downlink data notification message carries a priority indication; The mobility management unit controls paging of the user equipment according to the priority indication. The method according to claim 11, wherein the indication information is a bearer identifier. The method according to claim 12, wherein the mobility management unit uses the bearer identifier to identify a bearer context, and controls paging of the user equipment according to the bearer context. The method according to claim 11, wherein the indication information is an allocation retention priority. The method according to claim 14, wherein the controlling, by the mobility management unit, the paging of the user equipment according to the priority indication comprises: when the priority indication identifies the user equipment When the call has a high priority, the mobility management unit carries a paging priority indication in the paging message corresponding to the user equipment. 16. The method of claim 11, the mobility management unit instructing to control the paging of the user equipment by the priority management unit comprises: the mobility management unit prioritizing processing a service currently having a high priority. 17. A processing system for downlink service data, characterized by comprising:  a core network gateway, configured to send a downlink data notification message to the mobility management unit when the downlink service data of the user equipment is received, where the downlink data notification message carries a priority indication;  The mobility management unit is configured to control paging according to the indication information.