WO2010133172A1

WO2010133172A1 - Method and system for implementing paging in local internet protocol (ip) access

Info

Publication number: WO2010133172A1
Application number: PCT/CN2010/072989
Authority: WO
Inventors: 朱慧芬; 李兰兰; 奚进
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-05-21
Filing date: 2010-05-20
Publication date: 2010-11-25
Also published as: CN101895986A

Abstract

A method and a system for implementing paging in the local Internet protocol (IP) access are provided. For the local IP access network, in the case that a user equipment (UE) connects directly to a home network or Internet through a home base station, when an external data network sends downlink data to the UE and the UE is in an idle state, the paging to the UE is triggered by the home base station, wherein the external data network may be a home internal network or Internet. Through the method, it realizes that the home network or Internet sends downlink data to the UE in an idle state in the local IP access, and ensures that the UE can receive the downlink data normally.

Description

Method and system for implementing paging in local IP access

The present invention relates to a home base station network technology, and more particularly to a method and system for implementing paging in local IP access. Background technique

A home base station is a small base station installed in a user's home or office area. It is called a home base station (HNB, Home NodeB) in a 3G system, and is called a Home ENodeB (HeNB) in a Long Term Evolution (LTE) system. It can be combined and expressed as H(e)NB or HNB/. HeNB.

In order to reduce the impact on the core network (CN, Core Network), the home base station system radio access network introduces a home base station gateway (H(e)NB GW ). The H(e)NB GW is connected to the core network, and the HNB/HeNB is connected to the H(e)NB GW. For the 3G system, the radio access network and the core network interface are the Iu interface of the macro base station and the core network interface; for the LTE system, the radio access network and the core network interface inherit the macro base station and the core network interface, and are the S1 interface. The physical connection of the Iu interface or the S1 interface exists in the H(e)NB GW. Logically, the Iu interface application layer protocol RANAP (for the LTE system, the S1 interface application layer protocol is S1-AP) may be distributed in H(e). On the NB or H(e)NB GW, or on both network elements of H(e)NB and H(e)NB GW. For LTE systems, the HeNB can be directly connected to the core network, and the network architecture is similar to that of the macro base station.

The 3G system packet switching (PS) domain and the LTE system support the always-on function for the user terminal (UE) and the core network. After the data connection is established, the UE can send data to the external data network at any time, and the external data network can also The UE sends data. The external data network referred to herein refers to an Internet Protocol (IP) network that is not part of the Public Land Mobile Network (PLMN) but is connected to the PLMN, such as a home internal network or the Internet. For In order to satisfy the UE and the core network to support the always-on function, the UE and the core network save the data connection context, and at the same time, in order to save resources, the radio resource connection between the UE and the access network and the connection between the access network and the core network are not The data does not exist, that is, the UE is in an idle state.

If the UE is in an idle state and the external data network sends data to the UE, it needs to initiate paging to the UE to trigger the establishment of a connection between the UE and the access network and the connection between the access network and the core network. 1 is a schematic flowchart of paging an UE when an existing external data network sends data to a UE, where a mobility management entity (MME), a serving gateway (S-GW), and a packet data network gateway (PDN GW) are network elements of a core network. The evolved NodeB (ENB) is the network element of the access network. As shown in FIG. 1, when the UE is in an idle state, the external network sends data to the UE, including the following steps:

Step 100: The external data network sends downlink data to the PDN GW. The target IP address is the IP address of the UE, such as the mobile phone. The PDN GW finds the corresponding S-GW according to the context of the mobile phone and forwards the downlink data.

Step 101: The S-GW sends a downlink data indication to the MME, and notifies the MME that the downlink data of the UE corresponding to the IP address needs to be sent. This process is implemented using the GPRS Tunneling Protocol Control Plane (GTP-C) message.

Step 102: After receiving the data indication, the MME finds that the UE is in an idle state, and sends a paging message to the ENB corresponding to the tracking area where the UE is located.

Step 103: After receiving the paging message, the ENB pages the UE in the corresponding tracking area.

Step 104: The UE initiates a radio resource control (RRC) connection establishment procedure after detecting the paging message, and includes a non-access stratum service request message in the RRC setup complete message.

Step 105: The ENB sends the service request message to the MME through the initial UE, and establishes an S1 signaling connection.

Step 106: The MME initiates a UE context establishment process.

Step 107: After the UE context establishment process is completed, the external data network and the UE may perform IP data communication.

H(e)NB is part of the PLMN and can provide general mobile services for mobile phone users. At the same time, H(e)NB is also part of the home network and should also provide access to the home network for mobile phones. In addition, because H(e)NB is connected to the Internet, for pure Internet service, there is no need to access the Internet through the PLMN core network. The mobile phone can directly access the Internet through H(e)NB. Based on the above requirements, 3GPP proposes local IP. (Local Ip) access technology, providing mobile phone users with access to the home network, and direct access to the Internet through H(e)NB. Figure 2 is a schematic diagram of the structure of the existing 3GPP local IP access network architecture. Including computers, printers, etc., as shown in Figure 2, in general, the mobile phone is connected to the Internet through the access network and the core network; when accessing the home base station, the home base station can directly connect to the home network and the Internet according to user requirements. The data channel is shown by the thick dotted line in Figure 2.

In the local IP access network shown in Figure 2, if the Internet or home network sends data to the mobile phone, the data is directly sent to the home base station, and the core network does not know the existence of the downlink data. In this case, if the UE is in an idle state, there is currently no solution for how to trigger paging to the UE, that is, for the 3GPP local IP access network, the UE directly connects to the home network or the Internet through the home base station. In this case, when the external data network sends downlink data to the UE and the UE is in an idle state, paging to the UE cannot be implemented, and thus the UE cannot normally receive downlink data. Summary of the invention

In view of the above, the main purpose of the present invention is to provide a method and system for implementing paging in a local IP access, which can implement paging to the UE and ensure that the UE normally receives downlink data.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for implementing paging in a local IP access. When an external data network sends downlink data to a user terminal UE and the UE is in an idle state, the home base station initiates paging for the UE. The home base station initiates paging to the UE: the home base station directly sends a paging to the UE within a local cell range.

The sending the paging to the UE in the local cell range specifically includes:

The home base station queries the context of the corresponding UE according to the target IP address information of the downlink data, and when the UE is in an idle state, the home base station sends a paging message to the UE on the control channel;

Receiving, by the UE, a paging message, initiating a radio resource control RRC connection establishment process, and sending a non-access stratum service request message as a paging response;

The home base station forwards the service request message to the core network through the initial UE message, and establishes a signaling connection; the core network sends a UE context setup request message to the home base station; after the UE context is established, the home base station sends the downlink data to the UE. .

The home base station triggers paging to the UE: the home base station sends a downlink data notification message to the core network, and the core network initiates paging to the UE by using the home base station specified in the downlink data notification message;

The downlink data notification message carries a home base station identifier.

The initiating paging by the designated home base station to the UE by the core network through the downlink data notification message includes:

Receiving, by the core network, a downlink data notification message from the home base station, querying a context of the UE, and sending a paging message to the designated home base station when the UE is in an idle state; the home base station is in a local cell range Paging the UE, the UE receives the paging message, initiates an RRC connection setup procedure, and sends a non-access stratum service request message as a paging response; the home base station forwards the service request message to the core network through the initial UE message. And establishing a signaling connection; the core network sends a UE context setup request message to the home base station; after the UE context is established, the home base station sends the downlink data to the UE.

If there is a home base station gateway, the core network first goes to the home base where the home base station is located The station gateway sends a paging message carrying the identity of the home base station; the home base station gateway forwards the paging message to the designated home base station of the home base station identifier.

In the 3G home base station network, the core network is a GPRS service support node SGSN, and the signaling connection is an Iu signaling connection;

In the LTE home base station network, the home base station is a home evolved base station HeNB, the core network is a mobility management entity MME, and the signaling connection shown is an S1 signaling connection.

The home base station HNB triggers paging to the UE: the home base station directly sends a paging to the UE in the local cell range, where the indication in the paging message is used to indicate that the local IP access application scenario is triggered by the downlink data. The reason for the paging of the direct paging sent by the home base station.

The home base station is configured in a 3G home base station network, and the sending the paging to the UE in the local cell range specifically includes:

The home base station queries the context of the corresponding UE according to the target IP address information of the downlink data, and when the UE is in an idle state, the home base station sends a paging message to the UE on the control channel, where the paging message is used for indicating Indicates that in the local IP access application scenario, the downlink data triggers the paging cause of the direct paging sent by the home base station;

Receiving, by the UE, a paging message, and determining, according to the indicated paging cause, that the downlink data of the local IP application scenario triggers the direct paging sent by the HNB, initiates an RRC connection establishment process, and sends a service request message of the non-access stratum as Paging response, wherein the requested service type is data transmission;

The home base station forwards the service request message to the SGSN by using the initial UE message, and establishes an Iu signaling connection; the SGSN sends a bearer setup request message to the home base station to trigger a bearer setup process; after the UE context is established, the home base station sends downlink data. Send to the UE.

The method also includes setting a paging wait timer in the home base station;

When the paging waiting timer expires and reaches the preset repeated paging initiation number upper limit, the home base station initiates a bearer deactivation process. The method also includes setting a paging wait timer in the core network;

When the paging waiting timer expires and reaches a preset repeated number of paging initiation times, the core network initiates a bearer deactivation process;

In the 3G home base station network, the core network is an SGSN; in the LTE home base station network, the core network is an MME.

A system for implementing paging in local IP access, comprising at least an external data network, a home base station, and a user terminal UE, where

The UE establishes a packet data connection to the local packet data network gateway, and the external data network uses the packet data connection to send IP data to the UE;

The home base station is configured to directly trigger paging to the UE when the external data network sends downlink data to the user terminal UE and the UE is in an idle state;

The home base station is provided with a local GGSN for implementing all or part of the GPRS gateway support node GGSN network element function, or a local PGW for implementing all or part of the PDN GW network element function;

A function of a part of the serving gateway is also set in the home base station.

The home base station is specifically configured to: query a context of the corresponding UE according to the target IP address information of the downlink data, and send a paging message to the UE on the control channel when the UE is in an idle state; The UE message is forwarded to the core network, and a signaling connection is established; the UE context setup request message is received from the core network, and after the UE context is established, the downlink data is sent to the UE;

The UE is specifically configured to: receive a paging message, initiate an RRC connection establishment process, and send a non-access stratum service request message to the home base station as a paging response; and receive downlink data forwarded from the home base station.

The system also includes a core network,

The home base station is specifically configured to send, to the core network, the number of downlinks carrying the identity of the home base station According to the notification message, the core network sends a paging to the UE through the home base station specified in the downlink data notification message; accepts the paging message from the core network, and pages the UE in the local cell range; and passes the received service request message through the initial The UE message is forwarded to the core network, and a signaling connection is established; the UE context setup request message is received from the core network, and after the UE context is established, the downlink data is sent to the UE;

The core network is configured to receive a downlink data notification message from the home base station, query a context of the UE, send a paging message to the designated home base station when the UE is in an idle state, and send a UE context establishment to the home base station. Request message

The system further includes a home base station gateway, where the core network first sends a paging message carrying the home base station identifier to the home base station gateway where the home base station is located; and the home base station gateway further identifies the designated home to the home base station The base station forwards the paging message.

In the 3G home base station network, the core network is an SGSN;

In the LTE home base station network, the home base station is a home evolved base station HeNB, and the core network is an MME.

The home base station is specifically configured to: query a context of the corresponding UE according to the target IP address information of the downlink data, and send a paging message to the UE on the control channel when the UE is in an idle state, where the paging message indicates In the scenario of the local IP access application, the downlink data triggers the paging cause of the direct paging sent by the home base station; the service request message of the non-access stratum is forwarded to the SGSN through the initial UE message, and the Iu signaling connection is established. Receiving a bearer setup request message from the SGSN, triggering a bearer setup process; after the UE context is established, transmitting downlink data to the UE;

The UE is specifically configured to receive a paging message, and determine that the packet is based on the indicated paging cause. After the downlink data of the IP application scenario triggers the direct paging sent by the HNB, the RRC connection establishment process is initiated, and the service request message indicating that the service type of the non-access stratum is the data transmission is sent to the home base station; Downstream data.

Setting a paging waiting timer in the home base station; when the paging waiting timer expires and reaching a preset repeated paging initiation number upper limit value,

The home base station is further configured to initiate a bearer deactivation process.

Setting a paging waiting timer in the core network; when the paging waiting timer expires and reaching the preset repeated paging initiation number upper limit value,

The core network is further configured to initiate a bearer deactivation process;

It can be seen from the technical solution provided by the present invention that, in the case of the local IP access network, when the UE directly connects to the home network or the Internet through the home base station, when the external data network sends downlink data to the UE and the UE is in an idle state, , triggering paging the UE by the home base station, wherein the external data network may be a home network or l _nternet. With the method of the present invention, in the local IP access, the home network or the Internet sends downlink data to the UE in the idle state, which ensures the normal reception of the downlink data by the UE. DRAWINGS

1 is a schematic diagram of a process of paging a UE when an existing external data network sends data to a UE; FIG. 2 is a schematic structural diagram of a network architecture of an existing 3GPP local IP access;

3 is a schematic structural diagram of a network architecture of a local IP access according to the present invention;

4 is a schematic flowchart of Embodiment 1 of paging a UE when an external data network sends data to a UE according to the present invention;

5 is a schematic flowchart of Embodiment 2 of paging a UE when an external data network sends data to a UE according to the present invention; 6 is a schematic flowchart of Embodiment 3 of paging a UE when an external data network sends data to a UE according to the present invention;

7 is a schematic flowchart of paging failure in the first embodiment of the present invention;

FIG. 8 is a schematic flowchart of paging failure in Embodiment 2 of the present invention. detailed description

3 is a schematic structural diagram of a network architecture of a local IP access according to the present invention. FIG. 3(a) is a schematic structural diagram of a network architecture of a local IP access in a 3GPP network, and FIG. 3(b) is a local IP connection in an LTE network. A schematic diagram of the structure of the incoming network architecture.

As shown in Figure 3(a), in the 3G home base station network, the local GGSN (L-GGSN) is a functional module of the home base station, which is used to implement all or part of the GPRS gateway support node (GGSN) network element functions, such as saving. The PDP context assigns an IP address to the UE as a gateway to the mobile network and the external data network.

As shown in FIG. 3(b), in the LTE home base station network, the local PGW (L-PGW) is a functional module of the home base station, and is used to implement all or part of the PDN GW network element functions, such as saving the packet data connection context information. The UE is assigned an IP address as a gateway of the mobile network and the external data network. The home base station may further include a function of a Serving GW, such as buffering downlink data and triggering paging, as needed.

The HNBs and HeNBs mentioned in Figures 3(a) and 3(b) include all of the functional modules of the current home base station.

Based on the network architecture shown in FIG. 3, in the case of the local IP access network, when the UE directly connects to the home network or the Internet through the home base station, when the external data network sends downlink data to the UE and the UE is in an idle state, the home is The base station triggers paging to the UE, where the external data network may be the home internal network or the Internet may be triggered by the home base station to perform paging to the UE. The following three methods may be implemented:

In the first mode, the home base station directly initiates paging to the UE within the local cell range. In order to ensure that the home base station can receive the downlink data sent by the external data network to the UE, the home base station should have the packet data network gateway function, and the UE has established a packet data connection to the local packet data network gateway, and the external data network uses the packet data connection. Send IP data to the UE.

The first method is applicable to the 3G home base station system and the LTE home base station system. In the local IP access, the home network or the Internet sends downlink data to the UE in the idle state.

In the second mode, the home base station sends a downlink data notification message to the core network to notify the core network to send a page. The downlink data notification message carries the home base station identifier, so that the core network only triggers the paging of the designated home base station, and the core network initiates paging to the UE by using the designated home base station. In the LTE home base station system, the home base station sends a downlink data notification message to the MME, where the downlink data notification message carries the home base station identifier; the MME sends a paging message to the home base station, where the home base station identifier is included. In the 3G home base station system, the home base station sends a downlink data notification message to the GPRS Service Support Node (SGSN), which includes the home base station identifier, and the SGSN sends a paging message to the home base station, which includes the home base station identifier.

In order to ensure that the home base station can receive the downlink data sent by the external data network to the UE, the home base station should have the packet data network gateway function, and the UE has established a packet data connection to the local packet data network gateway, and the external data network uses the packet data connection. Send IP data to the UE.

The home base station identifier is a parameter that can identify the home base station, and may be, but is not limited to, a home base station identity identifier, or a cell identifier. The downlink data notification message may be a GTP-C message, or may be an S1 interface message or the like.

In the second method, the local IP access is also implemented, and the home network or the Internet sends downlink data to the UE in the idle state. Moreover, in the second mode, the paging message is only transmitted to the designated home base station, the paging range is reduced, and the paging efficiency is improved.

In a third mode, the home base station directly sends a paging to the UE in the local cell range, and paging The reason for the paging is indicated in the message, indicating that in the local IP access application scenario, the downlink data triggers the direct paging sent by the home base station. The UE receives the direct paging sent by the home base station and initiates a service request. Here, the active originating service request indicates that the service request type indicates that the UE requires data transmission in the service request message of the non-access stratum.

For the 3G system, the service request message sent by the mobile phone includes the service type, which may be required to transmit signaling or request to transmit data or a paging response, etc. Under normal circumstances, the mobile phone receives the paging message and fills in the service request message with the data type as paging. response. If the home base station directly sends the page, the core network refuses to process the page because it has not sent the page after receiving the page request. In the third mode, the page cause is indicated in the page message, and the page rejection is prevented. The problem is that the UE normally receives downlink data.

In the third mode, the local IP access is also implemented, and the home network or the Internet sends downlink data to the UE in the idle state, and the normal application of the method of the present invention in the 3G network is ensured.

The method of the present invention will be described in detail below with reference to FIG. 3 and the embodiments.

FIG. 4 is a schematic flowchart of Embodiment 1 of paging the UE when the external data network sends data to the UE according to the present invention. In Embodiment 1, the paging of the UE is implemented in the first manner, and H is not in the LTE home base station network, the UE and the The HeNB supports local IP services, as shown in Figure 4, including:

Steps 400 to 402: The UE accesses the HeNB, the UE initiates a data service, completes the packet data network connection activation process, and directly accesses the external data network through the HeNB. The UE temporarily stops the data service and enters an idle state. At this time, the HeNB and the UE still The packet data network connection context is retained.

The external data network may be a home internal network or the Internet

Step 403: It is assumed that the computer connected in the home network sends downlink data to the UE through the HeNB, and the HeNB receives the data and performs buffering.

Step 404: The HeNB queries the upper and lower sides of the corresponding UE according to the target IP address information of the downlink data. The UE is found to be in an idle state, and the HeNB directly sends a paging message to the UE on the control channel.

In this step, the context of the UE carries information such as the IP address of the UE (obtained when the packet data network is connected), the UE identifier, and the like.

Step 405: The UE receives the paging message, initiates an RRC connection establishment process, and sends a service request message of the non-access layer.

Step 406 to step 407: The HeNB forwards the service request message to the MME through the initial UE message, and establishes an S1 signaling connection. The MME sends a UE context setup request message to the home base station, including UE context information bearer setup information, and triggers a UE context setup procedure.

In this step, it is assumed that the MME can distinguish between the active service request and the paging response in the service request message, that is, the MME can identify that the UE accesses the external network through the local IP mode, for example, by setting a specific identifier, etc. The implementation method can be implemented by a person skilled in the art without creative labor, and is not used to limit the protection scope of the method of the present invention. Thus, even if the MME does not send a paging message, the MME processes the received homing. The service request message of the response type.

Step 408: The UE context establishment process is completed, the HeNB sends the downlink data to the UE, and the UE and the external data network can communicate normally. In the local IP access, the external data network is successfully sent to the UE in the idle state to successfully send downlink data.

FIG. 5 is a schematic flowchart of a second embodiment of paging the UE when the external data network sends data to the UE according to the present invention. In the second embodiment, the second method is used to implement paging for the UE, where H is not in the LTE home base station network, the UE and the The HeNB supports local IP services, as shown in Figure 5, including:

Steps 500 to 502: The UE accesses the HeNB, the UE initiates a data service, completes the packet data network connection activation process, and directly accesses the external data network through the HeNB. The UE temporarily stops the data service and enters an idle state. At this time, the HeNB and the UE still The packet data network connection context is retained. The external data network may be a home internal network or the Internet

Step 503: It is assumed that the computer connected in the home network sends downlink data to the UE through the HeNB, and the HeNB receives the data and performs buffering.

Step 504: The HeNB queries the context of the corresponding UE according to the target IP address information of the downlink data, and finds that the UE is in an idle state, and sends a downlink data notification message to the MME, where the downlink data notification message carries the home base station identifier.

Step 505: The MME receives the downlink data notification message from the HeNB, queries the context of the UE, and learns that the UE is in an idle state, and sends a paging message to the HeNB.

It should be noted that, if there is a HeNB GW, the MME sends a paging message to the HeNB GW where the HeNB is located, including the home base station identifier that can identify the home base station; and the HeNB GW forwards the paging message to the designated HeNB of the home base station identifier. If the HeNB GW does not exist, that is, the HeNB directly connects to the core network, the MME directly sends a paging message to the designated HeNB of the home base station identifier.

Step 506: The HeNB pages the UE within the local cell range.

Step 507: The UE receives the paging message, initiates an RRC connection establishment process, and sends a service request message of the non-access layer.

Step 508: The HeNB forwards the service message to the MME through the initial UE message, and establishes an S1 signaling connection. The MME sends a UE context setup request message to the HeNB, including the UE context information bearer setup information, and triggers the UE context setup process.

Step 509: The UE context establishment process is completed, and the HeNB sends the downlink data to the UE, and the UE and the external data network can communicate normally.

The first embodiment and the second embodiment are equally applicable to the 3G system, and only the relevant core network element MME is replaced with the SGSN. FIG. 6 is a schematic flowchart of Embodiment 3 of paging a UE when an external data network sends data to a UE according to the present invention. Embodiment 3 implements paging to the UE in a third manner, where H is not in the 3G home base station network, UE and HNB supports local IP services, as shown in Figure 6, including:

Steps 600 to 602: The UE accesses the HNB, the UE initiates a data service, completes the packet data network connection activation process, and directly accesses the external data network through the HNB. The UE temporarily stops the data service and enters an idle state. At this time, the HNB and the UE still The packet data network connection context is retained.

The external data network may be a home internal network or the Internet

Step 603: It is assumed that the computer connected in the home network sends the downlink data to the UE through the HNB, and the HNB receives the data and performs caching.

Step 604: The HNB queries the context of the corresponding UE according to the target IP address information of the downlink data, and finds that the UE is in an idle state, and the HNB directly sends a paging message to the UE on the control channel, where the paging message indicates the paging cause. It indicates that the local IP downlink data triggers the direct paging initiated by the HNB.

In this step, the context of the UE may include information such as an IP address of the UE (obtained when the packet data network is connected), a UE identifier, and the like.

Step 605: The UE receives the paging message, and determines that the downlink data of the local IP application scenario triggers the direct paging sent by the HNB according to the indicated paging cause. The RRC connection establishment process is initiated, and a service request message of the non-access stratum is sent, and the service request message indicates that the request service type is data transmission.

Step 606: The HNB forwards the service request message to the SGSN through the initial UE message, and establishes an Iu signaling connection. The SGSN sends a bearer setup request message to the HNB to trigger the bearer setup process.

Step 607: The UE context establishment process is completed, and the HNB sends the downlink data to the UE, and the UE and the external network can communicate normally. The foregoing provides three methods for implementing paging in the present invention. If the downlink data sent by the external network triggers paging through the home base station, the paging failure occurs, and the home base station can delete the context of the data network connection.

FIG. 7 is a schematic flowchart of paging failure in the first embodiment of the present invention. A paging waiting timer is preset in the HeNB, as shown in FIG. 7, including:

The specific implementation of the steps 700 to 704 is completely consistent with the steps 400 to 404, and will not be repeated here.

Step 705 to step 706: The paging waiting timer expires, and the HeNB determines whether to repeatedly send the paging according to the preset execution policy, and the execution policy indicates that the paging number of the repeated paging is exceeded, and if the number of repeated paging attempts is not reached, The HeNB re-initiates the paging, and increments the count value by one until the upper limit of the recurring paging number is still the paging timeout, and the UE does not send the paging response, then the HeNB initiates the bearer deactivation process, releasing the local IP access. Corresponding data network connection corresponding bearer. The bearer deactivation process may be performed by using an S1 interface message or a GTP-C message, and the specific implementation is a technical means used by those skilled in the art, and details are not described herein again.

In the procedure of paging failure in the third embodiment, except for the paging reason indicated in the paging message, the other is the same as that shown in FIG. 7, and details are not described herein again.

FIG. 8 is a flowchart of paging failure in the second embodiment of the present invention. A paging waiting timer is preset in the MME, as shown in FIG. 8, including:

The specific implementation of step 800 to step 806 is completely the same as step 500 to step 506, and will not be repeated here.

Step 807 to step 808: The paging waiting timer expires, and the MME determines whether to repeatedly send the paging according to the preset execution policy, and the execution policy indicates that the upper limit of the paging number is repeatedly initiated, if the upper limit of the number of repeated paging attempts is not reached. The MME re-initiates the paging, and increments the count value by one until the upper limit of the recurring paging number is still the paging timeout, and the UE does not send the paging response, then the MME initiates the bearer deactivation process, releasing the local IP access. Corresponding data network connection pair Should bear. The bearer deactivation process may be performed by using an SI interface message or a GTP-C message, and the specific implementation is a technical means used by those skilled in the art, and details are not described herein again.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method for implementing paging in local IP access, characterized in that, when the external data network sends downlink data to the user terminal UE and the UE is in an idle state, the home base station triggers paging to the UE.

2. The method according to claim 1, wherein the home base station triggers paging to the UE: the home base station directly initiates paging to the UE within a local cell range.

The method according to claim 2, wherein the initiating paging to the UE in the range of the local cell specifically includes:

The home base station forwards the service request message to the core network through the initial UE message, and establishes a signaling connection; the core network sends a UE context setup request message to the home base station; after the UE context is established, the home base station sends the downlink data. Give the UE.

The method according to claim 1, wherein the user base station triggers paging to the UE: the home base station sends a downlink data notification message to the core network, and the core network specifies the downlink data notification message. The home base station initiates paging to the UE;

The downlink data notification message carries a home base station identifier.

The method according to claim 4, wherein the initiating paging by the designated home base station to the UE by the core network through the downlink data notification message includes:

Receiving, by the core network, a downlink data notification message from the home base station, querying a context of the UE, and sending a paging message to the designated home base station when the UE is in an idle state; The home base station paging the UE in the local cell range, the UE receives the paging message, initiates an RRC connection establishment process, and sends a non-access stratum service request message as a paging response; the home base station sends a service request The message is forwarded to the core network by using the initial UE message, and a signaling connection is established. The core network sends a UE context setup request message to the home base station. After the UE context is established, the home base station sends the downlink data to the UE.

The method according to claim 5, wherein if there is a home base station gateway, the core network first sends a paging message carrying the home base station identifier to the home base station gateway where the home base station is located; The base station gateway forwards the paging message to the designated home base station of the home base station identifier.

The method according to claim 3, 5 or 6, wherein in the 3G home base station network, the core network is a GPRS service support node SGSN, and the signaling connection is an Iu signaling connection;

The method according to claim 1, wherein the home base station HNB triggers paging to the UE: the home base station directly sends a paging to the UE in a local cell range, and the paging message indicates It is used to indicate that in the local IP access application scenario, the downlink data triggers the paging cause of the direct paging sent by the home base station.

The method according to claim 8, wherein the home base station is configured in a 3G home base station network, and the sending the paging to the UE in the local cell range specifically includes:

Receiving, by the UE, a paging message, determining, according to the indicated paging cause, a local IP application After the downlink data of the scenario triggers the direct paging sent by the HNB, the RRC connection establishment process is initiated, and the service request message of the non-access stratum is sent as the paging response, where the requested service type is data transmission;

The method according to claim 2 or 8, wherein the method further comprises: setting a paging waiting timer in the home base station;

When the paging waiting timer expires and reaches the preset repeated number of paging initiation times, the home base station initiates a bearer deactivation procedure.

The method according to claim 4, further comprising: setting a paging waiting timer in the core network;

A system for implementing paging in local IP access, characterized in that it includes at least an external data network, a home base station, and a user terminal UE, where

The home base station is provided with a local GGSN for implementing all or part of the GPRS gateway support node GGSN network element function, or a local PGW for implementing all or part of the PDN GW network element function; A function of a part of the serving gateway is also set in the home base station.

13. The system of claim 12, wherein

14. The system of claim 12, wherein the system further comprises a core network,

The home base station is specifically configured to: send, to the core network, a downlink data notification message that carries the identifier of the home base station, where the core network sends a paging to the UE by using the home base station specified in the downlink data notification message; and accepts a paging message from the core network. Paging the UE in the local cell range; forwarding the received service request message to the core network through the initial UE message, and establishing a signaling connection; receiving the UE context setup request message from the core network, after the UE context is established, The downlink data is sent to the UE;

15. The system of claim 14 wherein said system further comprises a family The base station gateway sends the paging message carrying the identifier of the home base station to the home base station gateway where the home base station is located; and the home base station gateway forwards the paging message to the home base station specified by the home base station identifier.

The system according to claim 13, 14, or 15, wherein, in the 3G home base station network, the core network is an SGSN;

17. The system of claim 12, wherein:

The UE is specifically configured to: after receiving the paging message, determine, according to the indicated paging cause, that the downlink data of the local IP application scenario triggers the direct paging sent by the HNB, initiate an RRC connection establishment process, and send the non-connection to the home base station. The inbound layer indicates that the request service type is a service request message for data transmission; and receives downlink data forwarded from the home base station.

The system according to claim 13 or 17, wherein a paging waiting timer is set in the home base station; when the paging waiting timer expires and reaches a preset repeated paging number of paging times,

The system according to claim 14, wherein a paging waiting timer is set in the core network; when the paging waiting timer expires and reaches a preset repeated paging number Limit,