WO2012171451A1

WO2012171451A1 - Information acquisition method, apparatus and system

Info

Publication number: WO2012171451A1
Application number: PCT/CN2012/076736
Authority: WO
Inventors: 梁爽; 王静; 周娜; 霍玉臻; 雷小燕
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-14
Filing date: 2012-06-11
Publication date: 2012-12-20
Also published as: CN102833682B; CN102833682A

Abstract

The invention provides an information acquisition method, device and system, and said method comprises: a home nodeB transmits a system broadcast message, wherein the system broadcast message carries the identification of the local network where the home nodeB locates; a terminal monitors the system broadcast message from the home nodeB, and obtains, from the system broadcast message, the identification of the local network where the home nodeB locates. The invention enables the terminal and the back-end network element of the local access gateway to obtain the local network identification, thus making it possible to execute the subsequent processing according to the local network identification, and improving the system performance.

Description

The present invention relates to the field of communications, and in particular to an information acquisition method, apparatus, and system. BACKGROUND OF THE INVENTION In order to maintain the competitiveness of the third generation mobile communication system in the communication field, the mobile communication service with faster speed, lower delay and more personalized is provided for the user, and at the same time, the operating cost of the operator is reduced, and the third generation cooperation The 3rd Generation Partnership Project (3GPP) Standards Working Group is working on the Evolved Packet System (EPS). FIG. 1 is a schematic structural diagram of an evolved packet domain system according to the related art. As shown in FIG. 1, the entire EPS system is divided into two parts: a radio access network and a core network. In the core network, a Home Subscriber Server (HSS), a Mobility Management Entity (MME), a Serving GPRS Support Node (SGSN), and a policy are included. Policy and Charging Rule Function (PCRF), Serving Gateway (S-GW), Packet Data Gateway (PDN Gateway, P-GW for short), and Packet Data Network (Packet Data Network) , packet data network). The functions of each part are described in detail below: The Home Subscriber Server (HSS), which contains all the functions of the Home Location Register (HLR), is the permanent storage location for the user's subscription data, and is located in the home network to which the user subscribes. The mobility management entity (MME) is the location where the subscriber subscription data is stored in the current network, responsible for terminal-to-network non-access stratum signaling management, terminal security verification function, terminal mobility management, and user idle mode tracking. And paging management functions and bearer management. The Serving GPRS Support Node (SGSN) is a service support point for GERAN and UTRAN users to access the core network. It is similar in function to the mobility management entity and is responsible for user location update, paging management, and bearer management. The Serving Gateway (S-GW) is the gateway from the core network to the wireless system. It is responsible for the user plane bearer from the terminal to the core network, the data buffer in the terminal idle mode, the function of initiating service requests on the network side, lawful interception and packet data routing. Forwarding function; The service gateway is responsible for counting the situation in which the user terminal uses the wireless network, and generates the CDRs of the terminal using the wireless network, and transmits the CDRs to the charging gateway. The Packet Data Gateway (P-GW) is a gateway of the evolved system and the external packet data network of the system. It is connected to the Internet and the packet data network, and is responsible for the Internet Protocol (IP) address allocation and accounting of the terminal. Features, packet filtering, policy control, and more. The General Packet Radio Service (GPRS) Support Node (GGSN) supports the edge routing function of the GPRS network. That is, the GGSN is responsible for routing and forwarding data of the GPRS network, and through the firewall and filtering functions. To protect the integrity of GPRS network data. The GGSN also has a charging function.

The P-GW includes all the functions of the GGSN, and the GGSN can be considered as a sub-function of the P-GW and embedded in the P-GW. Therefore, the SGSN can be directly connected to the P-GW, using the Gn/Gp interface. A packet data network (PDN) is an operator's IP service network that provides IP services to users through the carrier's core network. The Policy Charging Rules Function Entity (PCRF) is a server in the evolution system that provides rules for charging control, online credit control, threshold control, and Quality of Service (QoS) policies. The radio access network is composed of an E-UTRAN NodeB (eB) and a 3G radio network controller (RNC), which is mainly responsible for transmitting and receiving wireless signals and contacting the terminal through the air interface. Manage radio resources, resource scheduling, and access control for the air interface. Home NodeB (HNB) or Evolved Home eNodeN (He B) is a small, low-power base station that is deployed as a dedicated resource for some users in a home, group, company, or school. The use of private places, mainly to provide users with higher service rates and reduce the cost of using high-rate services, while making up for the lack of coverage of existing distributed cellular wireless communication systems. The advantages of home base stations are affordability, convenience, low power output, plug and play, broadband access, and the ability to use single mode terminals. The home base station can be applied in a 3G or Long Term Evolution (LTE) mobile communication network. 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 network. The main functions performed by the home base station gateway are: verifying the security of the home base station, performing maintenance and management on the operation of the home base station, configuring and controlling the home base station according to the operator's requirements, and exchanging data information of the core network and the home base station. In order to provide different privacy, the home base station has different access modes, namely closed mode, mixed mode and open mode. For the first two modes, the user needs to verify the CSG (closed subscribed group) subscription information of the user from the base station. In addition to supporting access through the mobile core network, the home base station can also support local IP access functions. Under the condition that the home base station has local IP access capability and the user subscribes to allow local IP access, the user can implement the user to the home network. Local access to IP devices or the Internet. Through the local access function, the Internet data service can be offloaded, the core network load can be reduced, and the access to the home network device can be forwarded without the core network, and the data transmission is convenient and efficient. The local IP access function can also be used on the macro cell. The main purpose is similar to that of the home base station, and more is applied to the scenario where the local IP accesses the Internet, in order to reduce the core network load. 2 is a first architectural diagram of implementing a local access function according to the related art, where a local access gateway (Local Gateway, also referred to as an L-GW, also referred to as a local gateway) is locally connected to an external network (for example, the internet). Network, providing address allocation, billing, packet filtering, policy control, data offloading, Radio Access Network Application Part (NAS/RANAP) message parsing, network address translation (Network Address Translation) , referred to as NAT), local IP access policy routing and execution. In addition, the local access gateway can also access the internal network to achieve mutual access within the jurisdiction of the local access gateway, different terminals directly, and internal networks. As an independent logical unit, the network element can be deployed in conjunction with an existing home base station during actual deployment. For the macro cell to implement the local access architecture, the local access gateway may also be deployed in conjunction with the base station. It can also be deployed as a separate network element. FIG. 3 is a second architecture diagram of implementing a local access function according to the related art. As shown in FIG. 3, if there is a home base station gateway in the network, the network element is located between the home base station and the mobility management unit. The local access gateway in FIG. 2 and FIG. 3 may also be a GGSN for the terminal accessed by the UMTS. When the local access gateway implements the internal network access function, in order to ensure the privacy of the internal network, the terminal accessing the internal network needs to be authenticated. According to the subscription information of the user, the mobility management unit (including the MME and the SGSN) needs to be the user. authenticating. Only APNs associated with accessing a local connection at a particular home base station are allowed. Among these specific home base stations, the home base station that allows the UE to enjoy uninterrupted service while moving, constitutes a local network and has an identity of a local network. A home base station in the same local network can provide the terminal with a local connection to the local network and ensure that the terminal provides a continuous service experience when moving in the local network. 4 is a schematic diagram of a structure in which a user moves outside a local network according to the related art. As shown in FIG. 4, when a user moves out of a local network or moves between different local networks, the local service of the terminal may not be provided, but other Business may still be contiguous. As described above, the home base station in a local network has a local network identifier, and therefore, the local network identifier becomes an important basis for judging whether a home base station is a home base station in the local network, and in other Related processing may also constitute a relevant processing basis. However, in the related art, the back-end network element of the terminal or the local access gateway cannot obtain the local network identifier of the home base station, thereby affecting the subsequent processing process and adversely affecting system performance. SUMMARY OF THE INVENTION The present invention provides an information acquisition method, apparatus, and system, so as to at least solve the problem that the back-end network element of the terminal or the local access gateway cannot obtain the local network identifier of the home base station, thereby affecting the subsequent processing process. Performance issues that adversely affect. An aspect of the present invention provides an information acquisition method, including: a home base station transmitting a system broadcast message, where the system broadcast message carries a local network identifier where the home base station is located; and the terminal monitors a location from the home base station The system broadcast message is obtained, and the local network identifier where the home base station is located is obtained from the system broadcast message. Preferably, the method further includes: receiving, by the terminal, a measurement control message from a source home base station for acquiring information about a neighboring cell of the terminal; and monitoring, by the terminal, the system broadcast message from the home base station, After the system broadcast message is used to obtain the local network identifier of the home base station, the method further includes: the terminal returning a measurement report message to the source home base station, where the measurement report message carries a pair The measurement report of the neighboring cell and/or the local network identifier of the neighboring cell. Preferably, after the measurement report message carries the local network identifier of the neighboring cell, after the terminal returns the measurement report message to the source home base station, the method further includes: the source home base station determining the handover The source home base station determines whether the local network identifier of the target cell is consistent with the local network identifier of the current access cell, and if yes, initiates a handover; otherwise, after the local connection is released, the handover is initiated. Preferably, in the case that control plane signaling exists between the source home base station and the local access gateway, the source home base station releasing the local connection includes: sending, by the source home base station, the local access gateway And requesting the local access gateway to delete the bearer release request message of the local connection; the local access gateway deletes the locally connected bearer, and sends a delete bearer request message to the mobility management unit; the mobility management unit deletes the And transmitting, by the locally connected gateway, a delete bearer response message to the local access gateway; the local access gateway returns a bearer release response message to the source home base station. Preferably, after the local access gateway deletes the locally connected bearer and sends a delete bearer request message to the mobility management unit, the method further includes: the mobility management unit sending a release bearer request message to the source home base station; Deriving the source home base station to send a release bearer request message to the terminal, the source home base station and the The terminal releases the bearer of the local connection; the terminal sends a release bearer response message to the mobility management unit by using the source home base station. Preferably, in the case that there is no control plane signaling between the source home base station and the local access gateway, the source home base station releases the local connection, including: the source home base station sends a request for the request to the mobility management unit. Deleting the locally connected bearer release request message by the local access gateway; the mobility management unit sending a delete session request message to the local access gateway; the local access gateway deleting the locally connected bearer, The mobile management unit sends a delete session response message; the mobility management unit sends a release bearer request message to the source home base station; the source home base station sends a release bearer request message to the terminal, the source home base station and the The terminal releases the bearer of the local connection; the terminal sends a release bearer response message to the mobility management unit by using the source home base station; the source home base station confirms that the local connection has been deleted. Preferably, in the case of LTE access, the source home base station initiating handover includes: the source home base station transmitting a handover request message to the mobility management unit or the target base station where the target cell is located; in the universal mobile communication system In the case of UMTS access, the source home base station initiating handover includes: the source home base station transmitting a relocation request message to the mobility management unit or transmitting an enhanced relocation request message to the target base station. Preferably, after the measurement report message carries the local network identifier of the neighboring cell, after the terminal returns the measurement report message to the source home base station, the method further includes: the source home base station determining the handover a source cell; the source home base station sends a handover request message to the mobility management unit, where the handover request message carries the local network identifier of the target cell; the mobility management unit determines the target cell Whether the local network identifier is consistent with the local network identifier of the current access cell and whether the local connection is allowed to be established. If the local network identifier of the target cell is consistent with the local network identifier of the current access cell and the local connection is allowed to be established, Then continue to perform the switch, otherwise, after releasing the local connection, continue to perform the switch. Preferably, in the case that there is control plane signaling between the source home base station and the local access gateway, the mobility management unit releasing the local connection includes: the mobility management unit sending the indication to the source home base station And deleting, by the source home base station, a handover request failure message of the local connection; the source home base station sending, to the local access gateway, a bearer release request message for requesting the local access gateway to delete the local connection; The access gateway deletes the bearer of the local connection, and sends a delete bearer request message to the mobility management unit; the mobility management unit deletes the bearer of the local connection, and sends a delete bearer response message to the local access gateway; The access gateway returns a bearer release response message to the source home base station. Preferably, after the local access gateway returns the bearer release response message to the source home base station, the method further includes: the source home base station sending a handover request message to the mobility management unit. Preferably, after the local access gateway deletes the locally connected bearer and sends a delete bearer request message to the mobility management unit, the method further includes: the mobility management unit sending a release bearer request message to the source home base station; The source home base station sends a release bearer request message to the terminal, the source home base station and the terminal release the locally connected bearer; the terminal sends a release bearer response to the mobility management unit by using the source home base station Message. Preferably, in the case that there is no control plane signaling between the source home base station and the local access gateway, the mobility management unit releasing the local connection includes: the mobility management unit sending the deletion to the local access gateway a session request message; the local access gateway deletes the locally connected bearer, and sends a delete session response message to the mobility management unit; the mobility management unit sends a release bearer request message to the source home base station; The home base station sends a release bearer request message to the terminal, the source home base station and the terminal release the locally connected bearer; and the terminal sends a release bearer response message to the mobility management unit by using the source home base station. Preferably, the release bearer request message sent by the mobility management unit to the source home base station and sent by the source home base station to the terminal includes a deactivation bearer request message sent to the terminal. Preferably, in a case that the local connection has multiple carriers, one of the bearer release request messages is sent, and the bearer release request message is used to indicate that the multiple bearers are deleted at the same time; The bearer release request message is used, and each of the multiple bearer release request messages is used to indicate that a bearer is deleted. Preferably, the determining, by the source home base station, the target cell to be handed over comprises: the source home base station preferentially selecting, as the target cell, a cell whose local network identifier is consistent with a local network identifier of a current access cell. Preferably, in the case that there is a home base station gateway in the network, a message between the source home base station and the mobility management unit is forwarded by the home base station gateway. Preferably, if the terminal is accessed from UMTS/GERAN, and the mobility management unit is a Gn/Gp service general packet radio service support node SGSN, a message between the mobility management unit and the local access gateway To delete the PDP context request/response; if the terminal accesses from LTE, the mobility management unit is the MME, or if the terminal accesses from UTMS/GERAN, the mobility management unit is S4 SGSN, then the mobility management unit and the local The message between the access gateways is forwarded by the serving gateway, and in the case that the serving gateway forwards the message, the serving gateway deletes the locally connected bearer. Another aspect of the present invention provides a method for acquiring information, including: a local access gateway sending a session establishment request message to a back-end network element of the local access gateway, where the session establishment request message carries The local network identifier to which the local access gateway belongs; the back-end network element receives the session establishment request message, and obtains the local network identifier from the session establishment request message. Preferably, the back-end network element is a policy and charging rule function entity or a charging gateway. Preferably, after the back-end network element is the policy and charging rule function entity, after acquiring the local network identifier from the session establishment request message, the method further includes: the policy and charging The rule function entity formulates a policy and/or a charging rule according to the local network identifier; and when the back network element is the charging gateway, acquiring the local network identifier from the session establishment request message After that, the method further includes: determining, by the charging gateway, the currently executed rate according to the local network identifier. Preferably, in the PDN connection setup/activation PDP context procedure, the local access gateway sends the session establishment request message to the backend network element of the local access gateway. A further aspect of the present invention provides a home base station, including: a broadcast module, configured to send a system broadcast message, where the system broadcast message carries a local network identifier where the home base station is located. Preferably, the home base station further includes: a measurement initiation module, configured to send a measurement control message for acquiring information about a neighboring cell of the terminal to the terminal; and a report receiving module, configured to receive the measurement report message returned by the terminal The measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell. Preferably, the home base station further includes: a target cell determining module, configured to determine a target cell of the handover; and a determining module, configured to determine whether the local network identifier of the target cell is consistent with a local network identity of the currently accessed cell If yes, the handover initiation module is triggered, otherwise, the connection release module is triggered; the handover initiation module is set to initiate the handover; and the connection release module is configured to release the local connection and trigger the handover initiation module. Preferably, the home base station further includes: a target cell determining module, configured to determine a target cell of the handover; and a handover initiation module, configured to send a handover request message to the mobility management unit, where the handover request message carries the target The local network identifier of the cell. A further aspect of the present invention provides a terminal, comprising: a listening module, configured to monitor a system broadcast message from a home base station, where the system broadcast message carries a local network identifier where the home base station is located; And being configured to obtain, from the system broadcast message, the local network identifier where the home base station is located. Preferably, the terminal further includes: a receiving module, configured to receive a measurement control message from the source home base station for acquiring information about a neighboring cell of the terminal; and a reporting module, configured to return a measurement report to the source home base station a message, where the measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell. Still another aspect of the present invention provides an information acquisition system including the above home base station and terminal. A further aspect of the present invention provides an information acquisition system, including: a local access gateway, configured to send a session establishment request message to a back-end network element of the local access gateway, where the session establishment request message carries The local network identifier that the local access gateway belongs to; the back network element is configured to receive the session establishment request message, and obtain the local network identifier from the session establishment request message. Preferably, the local access gateway is configured to send the session establishment request message to the backend network element of the local access gateway in a PDN connection setup/activation PDP context procedure. With the present invention, the local network identifier of the home base station is transmitted by the home base station, and the terminal obtains the local network identifier of the home base station by listening to the broadcast message, so that the terminal successfully obtains the local network identifier. The present invention also provides a scheme for the back-end network element of the local access gateway to obtain the local network identifier, and the local access gateway transmits the local network identifier to the back-end network element through the session establishment request message, thereby ensuring the back-end network. The meta can obtain the local network identifier for subsequent processing. The present invention solves the problem that the network element of the terminal or the local access gateway cannot obtain the local network identifier, thereby affecting the subsequent processing and reducing the performance of the system. The terminal and the network element of the local access gateway can obtain the local network identifier. This makes it possible to perform subsequent processing based on the local network identifier, improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic structural diagram of an evolved packet domain system according to the related art; FIG. 2 is a first architectural diagram of implementing a local access function according to the related art; FIG. 3 is a local access function according to the related art. A second architectural diagram; FIG. 4 is a schematic diagram of a structure of a user moving outside a local network according to the related art; 5 is a flow chart of a method for acquiring a home base according to an embodiment of the present invention; FIG. 6 is a block diagram showing a structure of a home base station according to an embodiment of the present invention; FIG. 7 is a block diagram of a preferred structure of a home base station according to an embodiment of the present invention; FIG. 8 is a block diagram of a preferred structure of a home base station according to an embodiment of the present invention; FIG. 9 is a block diagram showing a preferred structure of a home base station according to an embodiment of the present invention; FIG. 10 is a structural block diagram of a terminal according to an embodiment of the present invention; Figure 12 is an interaction flow chart according to Embodiment 1; Figure 13 is an interaction flow chart according to Embodiment 2; Figure 14 is an interaction flow chart according to Embodiment 3; 15 is an interaction flowchart according to Embodiment 4; FIG. 16 is an interaction flowchart according to Embodiment 5; FIG. 17 is an interaction flowchart according to Embodiment 6; FIG. 18 is another information acquisition method according to an embodiment of the present invention. Flowchart; Figure 19 is an interaction flow diagram according to Embodiment 7. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 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. FIG. 5 is a flowchart of a method for acquiring information according to an embodiment of the present invention. As shown in FIG. 5, the method includes: Step S502: A home base station sends a system broadcast message, where the system broadcast message carries the home base station Local network identity; Step S504: The terminal monitors a system broadcast message from the home base station, and obtains a local network identifier where the home base station is located from the system broadcast message. Through the above method, the home base station sends the local network identifier of the home base station through the broadcast, and the terminal obtains the local network identifier of the home base station by listening to the broadcast message, so that the terminal successfully obtains the local network identifier, so that the terminal performs subsequent processing according to the local network identifier. It is possible to improve system performance. In a practical application, the terminal may report the obtained local network identifier to the home base station to which the terminal belongs, which may be implemented by the following process: The terminal receives the measurement control of the information about the neighboring cell of the terminal from the source home base station. The terminal listens to the system broadcast message from the home base station, obtains the local network identifier of the home base station from the system broadcast message, and returns a measurement report message to the source home base station, where the measurement report message carries a measurement report for the neighboring cell and/or Or the local network identity of the neighboring cell. Through the above process, when the location of the terminal changes, the home base station to which the terminal belongs can obtain the local network identifier of the neighboring cell of the terminal, so that the subsequent network side can determine whether the selected handover cell and the source home base station belong to the same cell. The local network, in this way, the network side can determine how to perform handover and how to handle different services of the terminal, thereby making the handover process smoother and providing higher quality of service for the terminal. After the source home base station obtains the local network identifier, the network side may perform a handover decision operation, and determine a subsequent handover process by comparing the local network identifier of the target cell with the local network identifier of the currently accessed cell. In practical applications, the above process can be implemented in two ways, as follows: In the first mode, the source home base station determines the target cell of the handover; the source home base station determines whether the local network identifier of the target cell and the local network identity of the currently accessed cell are Consistent, if yes, initiate a switch, otherwise, after releasing the local connection, initiate a switch.

(1) In the case that there is control plane signaling between the source home base station and the local access gateway, the process of releasing the local connection by the source home base station is as follows: The source home base station sends a request to the local access gateway to request the local access gateway to delete. a locally connected bearer release request message; the local access gateway deletes the locally connected bearer, and sends a delete bearer request message to the mobility management unit; the mobility management unit deletes the locally connected bearer, and sends a delete bearer response message to the local access gateway; The ingress gateway returns a response message (bearer release response message) of the bearer release request message to the source home base station. Preferably, if there are multiple bearers in the local connection, a bearer release request message is sent, and the bearer release request message is used to indicate that multiple bearers are deleted at the same time; or, multiple bearer release request messages are sent, and multiple bearers are sent. Each bearer release request message in the release request message is used to indicate that a bearer is deleted. In addition, those skilled in the art should understand that the bearer release response message corresponds to the bearer release request message, and therefore, preferably, the number of bearer release response messages is consistent with the number of bearer release request messages. Optionally, after the local access gateway deletes the locally connected bearer and sends the delete bearer request message to the mobile management unit, the mobility management unit may send a release bearer request message to the source home base station (preferably carrying the deactivated bearer sent to the terminal) The source home base station may send a release bearer request message to the terminal (preferably carrying a deactivated bearer request sent to the terminal), and the source home base station and the terminal release the locally connected bearer; the terminal sends the release to the mobility management unit through the source home base station. Carry a response message. The above process will be described in detail in Embodiment 1 and Embodiment 3.

(2) In the case that there is no control plane signaling between the source home base station and the local access gateway, the process of releasing the local connection by the source home base station is as follows: The source home base station sends a request to the mobility management unit to request the local access gateway to delete. a locally connected bearer release request message; the mobility management unit sends a delete session request message to the local access gateway; the local access gateway deletes the locally connected bearer, and sends a delete session response message to the mobility management unit; the mobility management unit sends the delete session response message to the source home base station Release the bearer request message (preferably carrying the deactivated bearer request sent to the terminal); the source home base station sends a release bearer request message to the terminal (preferably carrying a deactivated bearer request sent to the terminal), and the source home base station and the terminal release the local connection The bearer sends a release bearer response message to the mobility management unit through the source home base station; the source home base station confirms that the local connection has been deleted. Preferably, if there are multiple bearers in the local connection, a bearer release request message is sent, and the bearer release request message is used to indicate that multiple bearers are deleted at the same time; or, multiple bearer release request messages are sent, and multiple bearers are sent. Each bearer release request message in the release request message is used to indicate that a bearer is deleted. The above process will be described in detail in Embodiment 2 and Embodiment 4. It should be noted that the process of initiating the handover can reuse the existing handover initiation process. Specifically, in the case of Long-Term Evolution (LTE) access, when the source home base station initiates handover, the mobile terminal moves to the mobile terminal. The target base station where the management unit or the target cell is located sends a handover request message; in the case of the Universal Mobile Telecommunications System (UMTS) access, when the source home base station initiates the handover, the relocation request is sent to the mobility management unit. The message or an enhanced relocation request message is sent to the target base station. In the second mode, the source home base station determines the target cell of the handover; the source home base station sends a handover request message to the mobility management unit, where the handover request message carries the local network identifier of the target cell; the mobility management unit determines the local network identifier of the target cell and the current Whether the local network identifier of the access cell is consistent and whether the local connection is allowed to be established. If the local network identifier of the target cell is consistent with the local network identifier of the currently accessed cell and the local connection is allowed to be established, the handover is continued, otherwise, the local connection is released. , continue to perform the switch. (1) In the case where there is control plane signaling between the source home base station and the local access gateway, the process of releasing the local connection by the mobility management unit is as follows: The mobility management unit sends a source home base station to indicate that the source home base station deletes The local connection handover request failure message; the source home base station sends a bearer release request message for requesting the local access gateway to delete the local connection to the local access gateway; the local access gateway deletes the locally connected bearer, and sends the delete bearer to the mobility management unit. a request message; the mobility management unit deletes the bearer of the local connection, and sends a delete bearer response message to the local access gateway; the local access gateway returns a response message (bearer release response message) of the bearer release request message to the source home base station. After the local access gateway returns a response message of the bearer release request message to the source home base station, the source home base station may resend the handover request message to the mobility management unit to resume the state of initiating the handover. Preferably, if there are multiple bearers in the local connection, a bearer release request message is sent, and the bearer release request message is used to indicate that multiple bearers are deleted at the same time; or, multiple bearer release request messages are sent, and multiple bearers are sent. Each bearer release request message in the release request message is used to indicate that a bearer is deleted. In addition, those skilled in the art should understand that the bearer release response message corresponds to the bearer release request message, and therefore, preferably, the number of bearer release response messages is consistent with the number of bearer release request messages. Optionally, after the local access gateway deletes the locally connected bearer and sends the delete bearer request message to the mobile management unit, the mobility management unit may send a release bearer request message to the source home base station (preferably carrying the deactivation to the terminal) a source home base station sends a release bearer request message to the terminal (preferably carrying a deactivated bearer request sent to the terminal), the source home base station and the terminal release the locally connected bearer; the terminal sends the source home base station to the mobility management unit Release the bearer response message. The above process will be described in detail in Embodiment 6.

(2) In the case that there is no control plane signaling between the source home base station and the local access gateway, the process of releasing the local connection by the mobility management unit is as follows: The mobility management unit sends a delete session request message to the local access gateway; The ingress gateway deletes the bearer of the local connection, and sends a delete session response message to the mobility management unit; the mobility management unit sends a release bearer request message to the source home base station (preferably carrying a deactivated bearer request sent to the terminal); the source home base station to the terminal Sending a release bearer request message (preferably carrying a deactivated bearer request sent to the terminal), the source home base station and the terminal release the bearer of the local connection; and the terminal sends a release bearer response message to the mobility management unit by the source home base station. The above process will be described in detail in Embodiment 5. In addition, in the process of determining the target cell to be switched by the source home base station, in order to keep the terminal to continue the local service as much as possible, when the home base station determines that the handover needs to be performed, the home base station may select a suitable target cell according to the acquired local network identifier of the neighboring cell. For example, the source home base station may preferentially select a cell whose local network identifier is consistent with the local network identifier of the currently accessed cell as the target cell. If the local network identifier of the neighboring cell is different from that of the home base station, the home base station needs to release the local connection and initiate the handover. Of course, the selection of the target cell may be performed according to other policies, which is not limited in this embodiment. In the above process, when there is a home base station gateway in the network, the message between the source home base station and the mobility management unit is forwarded through the home base station gateway. If the terminal is from a universal mobile communication system

(Universal Mobile Telecommunications System, abbreviated as UMTS) I GSM/EDGE Radio Access Network (GSM/EDGE Radio Access Network, referred to as GERAN) access, and the mobility management unit is a Gn/Gp monthly general packet radio service support node (Serving General packet radio service support node, hereinafter referred to as SGSN), the message between the mobility management unit and the local access gateway is to delete the PDP context request/response; if the terminal accesses from LTE, the mobility management unit is the MME, or if The terminal accesses from the UTMS/GERAN, and the mobility management unit is the S4 SGSN. Then, the message between the mobility management unit and the local access gateway is forwarded by the serving gateway. In the case that the serving gateway forwards the message, the serving gateway deletes the locally connected bearer. FIG. 6 is a structural block diagram of a home base station according to an embodiment of the present invention. The home base station includes: a broadcast module 62, configured to send a system broadcast message, where the system broadcast message carries a local network identifier where the home base station is located. Through the above broadcast module 62, the home base station supporting the mobile in the local network can broadcast the local network identifier, so that the terminal can obtain the local network identifier of the home base station by listening to the broadcast, so that the terminal performs subsequent processing according to the local network identifier. Possibly, improved system performance. FIG. 7 is a block diagram of a preferred structure of a home base station according to an embodiment of the present invention. The home base station may further include: a measurement initiation module 72, configured to send a measurement control message for acquiring information about a neighboring cell of the terminal to the terminal; The module 74 is coupled to the measurement initiation module 72 and configured to receive the measurement report message returned by the terminal, where the measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell. With the above configuration, the home base station can obtain the neighboring cell related information by using the measurement control message, and the network side can determine whether the selected handover cell and the source home base station cell belong to the same local network, so that the network side can In this way, it is judged how to perform handover and how to handle different services of the terminal, thereby making the handover process smoother and providing higher quality of service for the terminal. FIG. 8 is a block diagram of a preferred structure of a home base station according to an embodiment of the present invention. The home base station may further include: a target cell determining module 82 coupled to the report receiving module 74, configured to determine a target cell for handover; a determining module 84, coupled The target cell determining module 82 is configured to determine whether the local network identifier of the target cell is consistent with the local network identity of the currently accessed cell, and if yes, trigger the handover initiating module 86; otherwise, trigger the connection release module 88; the handover initiating module 86, The coupling to the determining module 84 is set to initiate the switching; the connection releasing module 88 is coupled to the determining module 84 and the switching initiating module 86, and is configured to trigger the switching initiating module 86 after releasing the local connection. This structure is used to implement the first method mentioned in the above method. FIG. 9 is a block diagram 3 of a preferred structure of a home base station according to an embodiment of the present invention. The home base station may further include: a target cell determining module 92 coupled to the report receiving module 74, configured to determine a target cell for handover; The module 94 is coupled to the target cell determining module 92, and configured to send a handover request message to the mobility management unit, where the handover request message carries the local network identifier of the target cell. This structure is used to implement the second method mentioned in the above method. FIG. 10 is a structural block diagram of a terminal according to an embodiment of the present invention. The terminal includes: a monitoring module 101, configured to monitor a system broadcast message from a home base station, where the system broadcast message carries a local network identifier where the home base station is located; 102. The module is coupled to the monitoring module 101, and configured to obtain, from the system broadcast message, a local network identifier where the home base station is located. Through the above structure, the terminal acquires the local network identifier of the home base station by listening to the broadcast message, so that the terminal performs subsequent processing according to the local network identifier, thereby improving system performance. 11 is a block diagram of a preferred structure of a terminal according to an embodiment of the present invention, and the terminal may further include: a receiving module

112, configured to receive a measurement control message from the source home base station for acquiring information about a neighboring cell of the terminal; the reporting module 114, coupled to the obtaining module 102 and the receiving module 112, configured to return a measurement report message to the source home base station, where The measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell. With the above configuration, the terminal includes the local network identification information of the neighboring cell in the measurement report message, and the network side can determine whether the selected handover cell and the source home base station cell belong to the same local network, so that the network side can This determines how to switch and how to handle different services of the terminal, so that the handover process is smoother and provides higher quality of service for the terminal. The embodiment of the present invention further provides an information acquisition system, including the above-mentioned home base station and terminal, and can be used to implement the method described in the foregoing embodiments. Embodiments 1-6 described below combine the technical solutions of the above-described plurality of preferred embodiments. Embodiment 1 FIG. 12 is an interaction flowchart according to Embodiment 1, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. Correct In the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1201: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1202: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. Step 1203: The UE reports the obtained measurement report to the home base station by using the measurement report message. Step 1204: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1205: The home base station determines whether the local network identifier of the selected target cell is consistent with its own. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is also considered to be inconsistent with its own local network identity. If it is determined in step 1205 that the A correlation step is performed consistently. In step 1206a, the source home base station sends a handover request message to the source mobility management unit. In the step 1207a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1205 that the B related step 1206b is performed, the source home base station sends a delete bearer request to the local gateway. This request is used to request the local gateway to delete the local connection, but the name of this message is not limited to this. If the local connection has multiple bearers, then the request needs to be able to delete those bearers. At this time, the source home base station may send multiple delete bearer requests, or delete the bearers simultaneously in one message. The request carries a local bearer identifier, or other identifier information that can identify the local connection or bearer, such as a tunnel end identifier. Step 1207b: The local gateway deletes the related bearer of the local connection according to the request of the source home base station, and sends a delete bearer request to the mobility management unit by using the SGW, where the local connection default bearer identifier is carried. Step 1208b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1209b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. In step 1210b, the mobility management unit and the SGW delete the related bearers of the local connection. The mobility management unit sends a delete bearer response to the local gateway through the SGW. Step 1211b: The local gateway sends a delete bearer response to the source home base station. If the local connection has multiple bearers, the local gateway can send multiple delete bearer responses or delete those bearers simultaneously in one message. Step 1212b: After confirming that the local connection is deleted, the source home base station sends a handover request message to the source mobility management unit. Step 1213b: Perform a subsequent process of the handover, and the subsequent process is similar to the prior art, and details are not described herein. Embodiment 2 FIG. 13 is an interaction flowchart according to Embodiment 2, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have no control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1301: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1302: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. In step 1303, the UE reports the obtained measurement report to the home base station through the measurement report message. Step 1304: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1305: The home base station determines whether the local network identifier of the selected target cell is consistent with its own. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is also considered to be inconsistent with its own local network identity. If it is determined in step 1305 that the A correlation step is performed consistently. Step 1306a, the source home base station sends a handover request message to the source mobility management unit. In the step 1307a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1305 that the inconsistency is performed, the B correlation step is performed. Step 1306b: The source home base station sends a delete bearer request to the source mobility management, where the request is used to request the local gateway to delete the local connection, but the name of the message is not limited thereto. If the local connection has multiple bearers, then the request needs to be able to delete those bearers. At this time, the source home base station may send multiple delete bearer requests, or delete the bearers simultaneously in one message. The request carries a local bearer identifier, or other identifier information that can identify the local connection or bearer, such as a tunnel end identifier. Step 1307b: The mobility management unit sends a delete session request to the local gateway through the SGW, where the local connection default bearer/primary PDP context identifier is carried. In step 1308b, the local gateway deletes the related bearer of the local connection and deletes the same, and sends a delete session response to the mobility management unit through the SGW. Step 1309b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1310b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. Step 1311b: After confirming that the local connection is deleted, the source home base station sends a handover request message to the source mobility management unit. Step 1312b: Perform a subsequent process of the handover, and the subsequent process is similar to the prior art, and details are not described herein. Embodiment 3 FIG. 14 is an interaction flowchart according to Embodiment 3, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1401: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1402: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. In step 1403, the UE reports the obtained measurement report to the home base station through the measurement report message. Step 1404: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1405: The home base station determines whether the local network identifier of the selected target cell is consistent with its own. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is also considered to be inconsistent with its own local network identity. If it is determined in step 1405 that the A correlation step is performed consistently. Step 1406a: The source home base station sends a handover request message to the target home base station. In the step 1407a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1405 that the B correlation step 1406b is performed, the source home base station sends a delete bearer request to the local gateway. This request is used to request the local gateway to delete the local connection, but the name of this message is not limited to this. If the local connection has multiple bearers, then the request needs to be able to delete those bearers. At this time, the source home base station may send multiple delete bearer requests, or delete the bearers simultaneously in one message. The request carries a local bearer identifier, or other identifier information that can identify the local connection or bearer, such as a tunnel end identifier. Step 1407b: The local gateway deletes the related bearer of the local connection according to the request of the source home base station, and sends a delete bearer request to the mobility management unit by using the SGW, where the local connection default bearer identifier is carried. Step 1408b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1409b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. In step 1410b, the mobility management unit and the SGW delete the related bearers of the local connection. The mobility management unit sends a delete bearer response to the local gateway through the SGW. In step 1411b, the local gateway sends a delete bearer response to the source home base station. If the local connection has multiple bearers, the local gateway can send multiple delete bearer responses or delete those bearers simultaneously in one message. Step 1412b: After confirming that the local connection is deleted, the source home base station sends a handover request message to the target home base station. Step 1413b: Perform a subsequent process of the handover, and the subsequent process is similar to the prior art, and details are not described herein. In the case of UMTS access, the messages in steps 1406a and 812b are enhanced relocation request messages. Embodiment 4 FIG. 15 is an interaction flowchart according to Embodiment 4, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or a home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have no control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1501: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1502: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. In step 1503, the UE reports the obtained measurement report to the home base station through the measurement report message. Step 1504: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1505: The home base station determines whether the local network identifier of the selected target cell is consistent with its own. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is also considered to be inconsistent with its own local network identity. If it is determined in step 1505 that the A correlation step is performed consistently. Step 1506a, the source home base station sends an enhanced relocation request message to the target home base station. In step 1507a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1505 that the inconsistency is performed, the B correlation step is performed. Step 1506b: The source home base station sends a delete bearer request to the source mobility management, where the request is used to request the local gateway to delete the local connection, but the name of the message is not limited thereto. If the local connection has multiple bearers, then the request needs to be able to delete those bearers. At this time, the source home base station may send multiple delete bearer requests, or delete the bearers simultaneously in one message. The request carries a local bearer identifier, or other identifier information that can identify the local connection or bearer, such as a tunnel end identifier. In step 1507b, the mobility management unit sends a delete session request to the local gateway through the SGW, where the local connection default bearer/primary PDP context identifier is carried. In step 1508b, the local gateway deletes the related bearer of the local connection, and deletes the session response sent by the SGW to the mobility management unit. Step 1509b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1510b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. Step 1511b: After confirming that the local connection is deleted, the source home base station sends an enhanced relocation request message to the target home base station. Step 1512b: Perform a subsequent process of the handover, and the subsequent process is similar to the prior art, and details are not described herein. In the case of LTE access, the messages in steps 1506a and 1512b are handover request messages. Embodiment 5 FIG. 16 is an interaction flowchart according to Embodiment 5, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further household The message between the base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have no control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1601: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1602: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. In step 1603, the UE reports the obtained measurement report to the home base station through the measurement report message. Step 1604: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1605: The source home base station sends a handover request message to the source mobility management unit, where the local network identifier of the target cell is carried. Step 1606: The source mobility management unit determines whether the local network identifier of the selected target cell is consistent with the current access cell local identifier. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is considered to be inconsistent. In addition, the source mobility management unit needs to determine whether the target cell is allowed to establish a local connection according to the subscription data, and the method for determining is not described in the prior art. If the determination is consistent in step 1606 and the establishment of the local connection is allowed to perform the A correlation step. In the step 1607a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1606 that it is inconsistent, or the local connection is not allowed to be performed, the B related step is performed. Step 1607b: The mobility management unit sends a delete session request to the local gateway through the SGW, where the local connection default bearer/primary PDP context identifier is carried. In step 1608b, the local gateway deletes the related bearer of the local connection and deletes the same, and sends a delete session response to the mobility management unit through the SGW. Step 1609b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1610b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. In the step 1611b, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. Embodiment 6 FIG. 17 is an interaction flowchart according to Embodiment 6, which is applicable to a local connection established by a user from a source home base station, and subsequently moved to another base station or home base station due to a location. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to delete the PDP context request/response. Step 1701: The home base station sends a measurement control message to the terminal, where the terminal obtains measurement information of the neighboring area. Step 1702: The UE measures neighboring cell related parameters according to the indication of the measurement control message. The UE obtains the local network identifier of the neighboring cell by monitoring the broadcast information of the neighboring cell. Step 1703: The UE reports the obtained measurement report to the home base station by using the measurement report message. Step 1704: Select an appropriate target cell according to the information in the measurement report. Optionally, the home base station may select a target cell of the same local network that is available according to the local network identifier of the target cell. Optionally, the home base station selects the target cell according to other principles. Step 1705: The source home base station sends a handover request message to the source mobility management unit, where the local network identifier of the target cell is carried. Step 1706: The source mobility management unit determines whether the local network identifier of the selected target cell is consistent with the current access cell local identifier. If the target cell is a base station or a home base station that does not support local connections, it may not have a local network identity, which is considered to be inconsistent. In addition, the source mobility management unit needs to determine whether the target cell is allowed to establish a local connection according to the subscription data, and the method for determining is not described in the prior art. If the determination in step 1706 is consistent and the establishment of the local connection is allowed to perform the A correlation step. In the step 1707a, the subsequent process of the handover is performed, and the subsequent process is similar to the prior art, and details are not described herein. If it is determined in step 1706 that it is inconsistent, or the local connection is not allowed to be performed, the B related step is performed. Step 1707b: The source mobility management unit returns a handover request failure message to the source home base station, indicating that the source home base station deletes the local connection. Step 1708b: The source home base station sends a delete bearer request to the local gateway. This request is used to request the local gateway to delete the local connection, but the name of this message is not limited to this. If the local connection has multiple bearers, then the request needs to be able to delete those bearers. At this time, the source home base station may send multiple delete bearer requests, or delete the bearers simultaneously in one message. The request carries a local bearer identifier, or other identifier information that can identify the local connection or bearer, such as a tunnel end identifier. Step 1709b: The local gateway deletes the related bearer of the local connection according to the request of the source home base station, and sends a delete bearer request to the mobility management unit by using the SGW, where the local connection default bearer identifier is carried. Step 1710b: The mobility management unit sends a release bearer request message to the home base station, where the mobility bearer request sent to the terminal is included. The home base station sends a release bearer request to the terminal, where the live bearer request sent to the terminal is included. The home base station and the terminal release the bearer indicated by the request. Step 1711b: The terminal sends a deactivated bearer response to the mobility management unit by using the home base station. In step 1712b, the mobility management unit and the SGW delete the related bearers of the local connection. The mobility management unit sends a delete bearer response to the local gateway through the SGW. In step 1713b, the local gateway sends a delete bearer response to the source home base station. If the local connection has multiple bearers, the local gateway can send multiple delete bearer responses or delete those bearers simultaneously in one message. Step 1714b: After confirming that the local connection is deleted, the source home base station sends a handover request message to the source mobility management unit. Step 1715b: Perform a subsequent process of the handover, and the subsequent process is similar to the prior art, and details are not described herein. In the above embodiments 1-6, the mobility management unit notifies the home base station and/or the terminal to delete the bearer request is optional. The message posted to the terminal may fail because the handover process is being performed. This process is well known to those skilled in the art and will not be described again. It should be noted that, in the embodiment 1-6, the manner in which the source home base station obtains the local network identifier of the target cell and how to use the identifier is described, but the manner and function of the identifier information that is actually acquired are not limited thereto. The embodiment of the present invention further provides a method for acquiring information, and FIG. 18 is a flowchart of another method for acquiring information according to an embodiment of the present invention. The method includes: Step S1802: A local access gateway connects to a back end of a local access gateway The network element sends a session establishment request message, where the session establishment request message carries the local network identifier to which the local access gateway belongs. Step S1804: The back-end network element receives the session establishment request message, and obtains the local network identifier from the session establishment request message. Through the above method, the local access gateway transmits the local network identifier to the back-end network element through the message, thereby ensuring that the back-end network element can obtain the local network identifier, which facilitates subsequent processing and solves the back-end of the local access gateway. The network element cannot obtain the local network identifier, which affects the subsequent processing and reduces the system performance. This makes it possible to perform subsequent processing according to the local network identifier and improve system performance. In actual applications, the types of the back-end network elements can be determined according to actual requirements. For example, the back-end network element can be a policy and charging rule function entity or a charging gateway. In the case that the back-end network element is a policy and charging rule function entity, after obtaining the local network identifier from the session establishment request message, the policy and charging rule function entity may formulate a policy and/or charging rule according to the local network identifier. In the case that the back-end network element is the charging gateway, after obtaining the local network identifier from the session establishment request message, the charging gateway may determine the currently executed rate according to the local network identifier. As shown in the above example, after obtaining the local network identifier, the back-end network element can perform corresponding processing according to the local network identifier, thereby improving system performance. Preferably, in the PDN connection setup/activation PDP context procedure, the local access gateway sends a session establishment request message to the backend network element of the local access gateway. The embodiment of the present invention further provides an information obtaining system, where the system may include: a local access gateway, configured to send a session establishment request message to a back-end network element of the local access gateway, where the session establishment request message carries a local The local network identifier to which the access gateway belongs; the back-end network element, coupled to the local access gateway, is configured to receive a session establishment request message, and obtain a local network identifier from the session establishment request message. The local access gateway is configured to send a session establishment request message to the back-end network element of the local access gateway in the PDN connection establishment/activation PDP context process. Embodiment 7 described below combines the technical solutions of the above-described plurality of preferred embodiments. Embodiment 7 FIG. 19 is an interaction flowchart according to Embodiment 7, which is applicable to a process in which a user establishes a local connection through a PDN connection or an activation PDP context flow. This embodiment is applicable to a terminal accessing an EPC network or a GPRS network from GERAN/UTRAN/EUTRAN. If the UE accesses from GERAN/UTRAN, the home base station is an HNB, the base station is a BSS or a NodeB/RNC, and the mobility management unit is an SGSN. If the UE accesses from the EUTRAN, the home base station is He B, the base station is an eNB, and the mobility management unit is an MME. There may be a home base station gateway in the network. If there is a home base station gateway, then all the messages between the home base station and the mobility management unit need to pass through the home base station gateway. Further, the message between the home base station and the local gateway may be through the home base station gateway or not through the home base station gateway. For the scenario in which the home base station gateway forwards the message, the home base station gateway transparently transmits the passed message, and the transparent transmission process has nothing to do with the present invention, and details are not described herein. This embodiment is applicable to the case where the home base station and the local gateway have control plane signaling. If it is a UMTS/GERAN access, and the mobility management unit is a Gn/Gp SGSN, there is no SGW in this process, and all messages passing through the SGW do not need to pass through the SGW, but the mobility management unit directly sends the message to the local gateway. The message between the SGSN and the local gateway is to create a PDP context request/response. Step 1901 1902, the terminal sends a PDN connection request/activation PDP context request, where the message carries the APN that the terminal wishes to establish. The non-access stratum message is included in the radio connection establishment request sent by the terminal to the home base station, and is sent to the mobility management unit by the home base station. For GERAN/UTRAN access, the above request is to activate the PDP context request. For EUTRAN access, the above request is a PDN connection request step 1903 1904, and the mobility management unit selects an appropriate local gateway address for the APN, or location information, or local gateway information provided in the message. The mobility management unit sends a create session request to the local gateway through the serving gateway, which carries parameters such as a UE identifier, a PDP type, QoS information, charging information, an APN, and location information of the terminal. Step 1905 1906: The local gateway sends an IPCAN session establishment request to the back-end network element, where the local network identifier to which the local gateway belongs is carried. The back-end network element may be a PCRF (Policy and Charging Rule Function) or a charging gateway. The PCRF receives the local network identifier, and may formulate different policies or charging rules according to the local network identifier. The billing gateway may perform different rates based on the local network ID. Step 1907, performing a PDN connection to establish/activate the remaining flow of the PDP context. It should be noted that, in Embodiment 7, the manner in which the back-end network element obtains the local network identifier described by the local access gateway is described, and how the identifier is used, but the manner and function of the identifier information obtained are not actually Limited to this. From the above description, it can be seen that the solution provided by the embodiment of the present invention solves the problem that the back-end network element of the terminal or the local access gateway cannot obtain the local network identifier, thereby affecting the subsequent processing process and reducing system performance, the terminal and the local. The back-end network element of the access gateway can obtain the local network identifier, which makes subsequent processing according to the local network identifier possible, and improves system performance. 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 so 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 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 spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. An information acquisition method, comprising:

The home base station sends a system broadcast message, where the system broadcast message carries a local network identifier where the home base station is located;

The terminal monitors the system broadcast message from the home base station, and obtains the local network identifier where the home base station is located from the system broadcast message.

2. The method according to claim 1, wherein

The method further includes: receiving, by the terminal, a measurement control message from a source home base station for acquiring information of a near cell of the terminal;

After the terminal listens to the system broadcast message from the home base station, and obtains the local network identifier of the home base station from the system broadcast message, the method further includes: the terminal is sent to the source home The base station returns a measurement report message, where the measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell.

The method according to claim 2, wherein, after the measurement report message carries the local network identifier of the neighboring cell, after the terminal returns a measurement report message to the source home base station, Includes:

Determining, by the source home base station, a target cell of the handover;

The source home base station determines whether the local network identifier of the target cell is consistent with the local network identifier of the current access cell, and if yes, initiates a handover; otherwise, after the local connection is released, the handover is initiated.

The method according to claim 3, wherein, in the case that control plane signaling exists between the source home base station and the local access gateway, the source home base station releasing the local connection includes:

Sending, by the source home base station, a bearer release request message for requesting the local access gateway to delete the local connection to the local access gateway;

The local access gateway deletes the bearer of the local connection, and sends a delete bearer request message to the mobility management unit;

The mobility management unit deletes the locally connected bearer, and sends a delete bearer response message to the local access gateway; The local access gateway returns a bearer release response message to the source home base station.

The method of claim 4, wherein after the local access gateway deletes the locally connected bearer and sends a delete bearer request message to the mobility management unit, the method further includes:

The mobile management unit sends a release bearer request message to the source home base station; the source home base station sends a release bearer request message to the terminal, where the source home base station and the terminal release the locally connected bearer;

The terminal sends a release bearer response message to the mobility management unit by using the source home base station.

The method according to claim 3, wherein, in the case that there is no control plane signaling between the source home base station and the local access gateway, the source home base station releasing the local connection includes:

Sending, by the source home base station, a bearer release request message for requesting the local access gateway to delete the local connection to the mobility management unit;

The mobility management unit sends a delete session request message to the local access gateway; the local access gateway deletes the locally connected bearer, and sends a delete session response message to the mobility management unit;

The terminal sends a release bearer response message to the mobility management unit by using the source home base station;

The source home base station confirms that the local connection has been deleted.

The method according to any one of claims 4 to 6, wherein

In the case of the LTE-based LTE access, the source home base station initiates the handover, including: the source home base station sends a handover request message to the mobility management unit or the target base station where the target cell is located;

In the case of the universal mobile communication system UMTS access, the source home base station initiating the handover includes: the source home base station transmitting a relocation request message to the mobility management unit or transmitting an enhanced relocation request message to the target base station .

Determining, by the source home base station, a target cell of the handover;

The source home base station sends a handover request message to the mobility management unit, where the handover request message carries the local network identifier of the target cell;

Determining, by the mobility management unit, whether the local network identifier of the target cell is consistent with a local network identifier of the current access cell, and whether a local connection is allowed to be established, if the local network identifier of the target cell and the current access cell If the local network identifier is consistent and the local connection is allowed to be established, the handover is continued. Otherwise, after the local connection is released, the handover is continued.

9. The method according to claim 8, wherein, in the case that control plane signaling exists between the source home base station and the local access gateway, the releasing the local connection by the mobility management unit comprises:

And the mobility management unit sends, to the source home base station, a handover request failure message for instructing the source home base station to delete the local connection;

The mobility management unit deletes the locally connected bearer, and sends a delete bearer response message to the local access gateway;

The local access gateway returns a bearer release response message to the source home base station.

The method according to claim 9, wherein, after the local access gateway returns the bearer release response message to the source home base station, the method further includes:

The source home base station sends a handover request message to the mobility management unit.

The method according to claim 9, wherein after the local access gateway deletes the locally connected bearer and sends a delete bearer request message to the mobility management unit, the method further includes:

The mobile management unit sends a release bearer request message to the source home base station; the source home base station sends a release bearer request message to the terminal, where the source home base station and the terminal release the locally connected bearer; The terminal sends a release bearer response message to the mobility management unit by using the source home base station.

The method according to claim 8, wherein, in the case that there is no control plane signaling between the source home base station and the local access gateway, the releasing the local connection by the mobility management unit comprises:

The method according to claim 5, 6, 11 or 12, wherein the mobility management unit sends the release bearer request message sent by the source home base station to the source home base station to the terminal The deactivation bearer request message sent to the terminal is included.

The method according to any one of claims 4-6, 9-12, wherein, in the case that the local connection has multiple carriers,

Sending the bearer release request message, and the bearer release request message is used to indicate that the multiple bearers are deleted at the same time; or sending the multiple bearer release request messages, and the multiple bearer release request messages are Each of the bearer release request messages is used to indicate that a bearer is deleted.

The method according to any one of claims 3-6, 8-12, wherein the source home base station determines that the switched target cell comprises:

The source home base station preferentially selects the cell whose local network identifier is consistent with the local network identity of the currently accessed cell as the target cell.

The method according to any one of claims 4-6, 9-12, wherein, in the case that there is a home base station gateway in the network, the message between the source home base station and the mobility management unit passes The home base station gateway forwards.

The method according to any one of claims 4-6, 9-12, wherein If the terminal is accessed from the UMTS/Global System for Mobile Communications Enhanced Data Rate Global System for Mobile Communications (LTE) evolved technology radio access network GERAN, and the mobility management unit is a Gn/Gp service general packet radio service support node SGSN, The message between the mobility management unit and the local access gateway is a delete PDP context request/response;

If the terminal accesses from LTE, the mobility management unit is the MME, or if the terminal accesses from the UTMS/GERAN and the mobility management unit is the S4 SGSN, the message between the mobility management unit and the local access gateway passes The serving gateway forwards, where the serving gateway forwards the message, the serving gateway deletes the locally connected bearer.

18. A method of obtaining information, comprising:

The local access gateway sends a session establishment request message to the back-end network element of the local access gateway, where the session establishment request message carries the local network identifier to which the local access gateway belongs; Receiving the session establishment request message, and acquiring the local network identifier from the session establishment request message.

19. The method of claim 18, wherein the backend network element is a policy and charging rule function entity or a charging gateway.

20. The method according to claim 19, wherein, after the backend network element is the policy and charging rule function entity, after obtaining the local network identifier from the session establishment request message The method further includes: the policy and charging rule function entity formulating a policy and/or a charging rule according to the local network identifier;

After the back-end network element is the charging gateway, after acquiring the local network identifier from the session establishment request message, the method further includes: determining, by the charging gateway, the current network identifier according to the local network identifier The rate of execution.

The method according to any one of claims 18 to 20, wherein, in a PDN connection establishment/activation PDP context procedure, the local access gateway to the backend network element of the local access gateway The session establishment request message is sent.

22. A home base station comprising:

The broadcast module is configured to send a system broadcast message, where the system broadcast message carries a local network identifier where the home base station is located. The home base station according to claim 22, further comprising: a measurement initiation module, configured to send, to the terminal, a measurement control message for acquiring information about a neighboring cell of the terminal;

The report receiving module is configured to receive the measurement report message returned by the terminal, where the measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell.

24. The home base station according to claim 23, further comprising: a target cell determining module, configured to determine a target cell of the handover;

a determining module, configured to determine whether the local network identifier of the target cell is consistent with a local network identifier of the currently accessed cell, and if yes, triggering a handover initiation module; otherwise, triggering a connection release module;

The switching initiation module is configured to initiate a handover;

The connection release module is configured to trigger the handover initiation module after releasing the local connection.

25. The home base station of claim 23, further comprising:

a target cell determining module, configured to determine a target cell of the handover;

The handover initiation module is configured to send a handover request message to the mobility management unit, where the handover request message carries the local network identifier of the target cell.

A terminal, comprising: a monitoring module, configured to monitor a system broadcast message from a home base station, where the system broadcast message carries a local network identifier where the home base station is located;

And an obtaining module, configured to obtain, from the system broadcast message, the local network identifier where the home base station is located.

27. The terminal of claim 26, further comprising:

a receiving module, configured to receive a measurement control message from the source home base station for acquiring information about a neighboring cell of the terminal;

The reporting module is configured to return a measurement report message to the source home base station, where the measurement report message carries a measurement report for the neighboring cell and/or a local network identifier of the neighboring cell.

An information acquisition system comprising the home base station of any one of claims 22-25 and the terminal of any one of claims 26-27.

29. An information acquisition system comprising:

a local access gateway, configured to send a session establishment request message to the back-end network element of the local access gateway, where the session establishment request message carries a local network identifier to which the local access gateway belongs;

The back-end network element is configured to receive the session establishment request message, and obtain the local network identifier from the session establishment request message.

30. The system according to claim 29, wherein the local access gateway is configured to send the session to the backend network element of the local access gateway in a PDN connection setup/activation PDP context procedure Create a request message.