CN102026401A - Mobility processing method and device - Google Patents

Abstract

The invention discloses a mobility processing method and a mobility processing device. The method comprises the following steps that: the original wireless side network element judges whether an achievable interface exists between a target wireless side network element and a local internet protocol access function implementation unit or not according to information of the target wireless side network element; and the original wireless side network element reports the interface capability to a core network mobility management unit according to a determined result to ensure that the core network mobility management unit can update or release a local internet protocol access link according to the interface capability, wherein the interface capability is used for indicating that whether the achievable interface exists between the target wireless side network element and the local internet protocol access function implementation unit or not. By the method and the device, local internet protocol (IP) access mobility is realized.

Description

Mobility processing method and device

technical field

The present invention relates to the communication field, in particular, to a mobility processing method and device.

Background technique

In order to maintain the competitiveness of the third-generation mobile communication system in the communication field, provide users with faster rate, lower delay, and more personalized mobile communication services, and at the same time reduce the operating costs of operators, the Third Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) standard working group is working on the research of the evolved packet system (Evolved Packet System, referred to as EPS).

FIG. 1 is a schematic structural diagram of an evolved packet domain system according to related technologies. 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, it includes Home Subscriber Server (HSS for short), Mobility Management Entity (MME for short), Serving General Packet Radio Service Support Node (Serving General Packet Radio Service Support Node, SGSN for short), Policy and Charging Rule Function (Policy and Charging Rule Function, PCRF for short), Serving Gateway (S-GW for short), PDN Gateway (P-GW for short) and packet Data network (Packet Data Network, packet data network). The functions of each part are detailed below:

The home user server is the permanent storage place of the user subscription data, and is located in the home network of the user subscription.

MME is the storage location of user subscription data in the current network. It is responsible for terminal-to-network non-access layer signaling management, terminal security verification function, terminal mobility management, user tracking and paging management functions in idle mode and Bearer management.

SGSN is the business support for users of GSM EDGE radio access network (GERAN for short) and Universal Mobile Telecommunications System Radio Access Network (UTRAN for short) to access the core network It is similar to MME in function, and is responsible for functions such as user location update, paging management, and bearer management.

The service gateway is the gateway from the core network to the wireless system, responsible for the user plane bearer from the terminal to the core network, data caching in the terminal idle mode, the function of initiating service requests on the network side, legal interception, and packet data routing and forwarding functions; the service gateway Responsible for making statistics on the use of wireless networks by user terminals, and generating bills of wireless network use by terminals, and sending them to the billing gateway.

The packet data gateway is the gateway between the evolution 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 terminal Internet Protocol (Internet Protocol, referred to as IP) address assignment, billing function, and packet filtering. , policy control and other functions.

The packet data network is the operator's IP service network, which provides IP services to users through the operator's core network.

The policy and charging rule functional entity is the server responsible for providing rules for charging control, online credit control, threshold control, and Quality of Service (QoS) policy in the evolution system.

The radio access network is composed of an evolved base station (E-UTRAN NodeB, referred to as eNB) and a 3G radio network controller (Radio Network Control, referred to as RNC). It is mainly responsible for the transmission and reception of wireless signals, and communicates with terminals through the air interface. , manage the radio resources, resource scheduling, and access control of the air interface.

The above SGSN is an upgraded SGSN, which can support the S4 interface with the serving gateway, and communicate with the mobility management unit using the GTPv2 protocol. However, for the SGSN supporting the 3G core network, the PS domain network architecture is different from that shown in Figure 1. At this time, the SGSN and the MME are connected through the Gn interface, and the GTPv1 protocol is adopted for intercommunication. The SGSN cannot be connected to the service gateway, and is connected to the Gateway GPRS Support Node (Gateway GPRS Support Node, referred to as GGSN) through the Gn interface to directly access the packet data network.

A home base station (Home NodeB, referred to as HNB) or an evolved home base station (Home eNodeB, referred to as HeNB) is a type of small, low-power base station, as a dedicated resource for some users, deployed in families, groups, companies or schools, etc. It is used in private places to provide users with higher service rates and reduce the cost of using high-speed services, while making up for the lack of coverage of existing distributed cellular wireless communication systems. The advantages of femtocells are affordable, convenient, low power output, plug and play, broadband access, and use of single-mode terminals.

Figure 2 is a schematic diagram 1 of wireless-side network elements accessing the core network according to related technologies. As shown in Figure 2, the home base station can be directly connected to the core network, or provide strong support for local IP access technology by adding a local gateway. The local gateway can be co-located with the network element on the wireless side.

Figure 3 is a schematic diagram 2 of network elements on the wireless side accessing the core network according to related technologies. As shown in Figure 3, the home base station can access the core network through the logical network element of the home base station gateway, wherein the main functions of the home base station gateway are: Verify the security of the home base station, handle the registration of the home base station, perform maintenance and management on the home base station, configure and control the home base station according to the operator's requirements, and be responsible for exchanging data between the core network and the home base station.

FIG. 4 is a third schematic diagram of network elements on the wireless side accessing the core network according to related technologies. As shown in FIG. 4 , in order to realize the local IP access function, a local gateway is added. The addition of a local access gateway can provide strong support for local IP access technology. The local gateway can be co-located with the wireless side network element or near the wireless side network element (that is, external), or it can be co-located with the home base station gateway or in the Near the Femtocell gateway (i.e. external). The local gateway can be a local SGW (Local SGW, L-SGW for short), a local PGW (Local PGW, L-PGW for short), a local GGSN (Local GGSN, L-GGSN for short), an external L-GW (Local GW) etc.

The local IP access involved in this article can refer to LIPA, and its full English name is LocalIPAccess, but it is not limited to this specific unique title. The specific application of local IP access can also include one of the following: local IP access to the user's local network, local IP Access to the company's local network, local IP access to the Internet, Internet or company or home business distribution operations.

5 is a schematic diagram of data flow paths of local IP access and traditional core network IP access according to related technologies. As shown in FIG. 5 , in the mobile communication network architecture, data flow paths of local IP access and traditional core network IP access. For users who support local IP access, traditional core network IP access data paths and local IP access data paths can be established. For the local IP access connection, the local IP access data path is from the terminal to the wireless side network element to the local access gateway (L-SGW, L-PGW, L-GGSN), and the data transmission does not pass through the core network. In order to realize the terminal's local access to other IP devices in the home network or the Internet, two connections can be established. The first local IP access data path directly accesses the Internet (Internet LIPA connection). The second local IP access data path directly accesses other IP devices in the home network (home network LIPA connection).

Figure 6 is a schematic diagram of the data flow path when the local IP access link moves according to the related technology. As shown in Figure 6, after the user establishes the connection and initiates the service, in order to improve the user experience and satisfaction, the operator requires the network to provide service continuity sex. At this time, the connection established by the user is required to be mobile. In the Long-Term Evolution (LTE) mobile communication network architecture, when the terminal moves, the data flow paths of local IP access and traditional core network IP access. Due to the particularity of the local IP access connection (data flow is directly transmitted from the wireless side network element), when the terminal moves, the data flow of the local IP access needs to go through the target wireless side network element to the original local packet data gateway (L-PGW), Among them, the local serving gateway (L-SGW) can use either the original one or the new one. The local gateway is located on the original wireless side network element or is placed near it. Therefore, whether the local IP access connection has mobility depends on the relationship between them. Whether there is an interface between. However, there is no solution for the core network in the prior art to judge this relationship, so the prior art cannot realize the mobility of the local IP access connection.

Contents of the invention

The present invention is proposed in view of the problem in the related art that the core network cannot judge whether there is an interface between the original wireless side network element and the target wireless side network element, which leads to the inability to realize the mobility of the local IP access connection. For this reason, the main purpose of the present invention The purpose is to provide a mobility processing solution to solve the above problems.

In order to achieve the above object, according to one aspect of the present invention, a mobility processing method is provided, the method includes: the original wireless side network element judges the target wireless side network element and the local Internet protocol access function according to the information of the target wireless side network element Realize whether there is an accessible interface between the units; the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result, so that the core network mobility management unit performs the update or release operation of the local Internet protocol access link according to the interface capability, Wherein, the interface capability is used to indicate whether there is a reachable interface between the target wireless side network element and the local Internet protocol access function implementing unit.

Preferably, the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result includes: the original wireless side network element sends a handover request message to the core network mobility management unit according to the judgment result, and carries the interface capability therein; Or the original wireless side network element sends a relocation request message to the core network mobility management unit according to the judgment result, and carries the interface capability in it; or the original wireless side network element sends a relocation request message carrying the interface capability to the target wireless side network element according to the judgment result Handover request message, so that the target wireless side network element reports the interface capability to the core network mobility management unit through the path switching request message.

Preferably, after the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result, the above method further includes: the core network mobility management unit receives the interface capability, and judges the target wireless side network element and the local network according to the interface capability Whether there is an accessible interface between the Internet Protocol access function implementation units; the core network mobility management unit performs an update or release operation of the local Internet Protocol access link according to the judgment result.

Preferably, the core network mobility management unit performs the update or release operation of the local Internet protocol access link according to the judgment result, including: if the judgment result is yes, then the core network mobility management unit executes the update operation of the local Internet protocol access link; If the result is no, then the core network mobility management unit executes the release operation of the local Internet protocol access link.

Preferably, the core network mobility management unit pre-saves the identification or address information of the local Internet protocol access function implementing unit, so as to update or release the local Internet protocol access link according to the identification or address information.

Preferably, the local Internet protocol access function implementing unit includes one of the following: a local service gateway and a local access gateway.

Preferably, the original wireless side network element includes one of the following: a home base station, a macro base station, and a home base station gateway.

Preferably, the information of the target wireless side network element includes at least one of the following: a network element identifier, and a closed user group identifier to which the network element belongs.

Preferably, the core network mobility management unit includes one of the following: a mobility management entity, and a serving GPRS support node.

In order to achieve the above object, according to another aspect of the present invention, a mobility processing device is provided, the device includes: a judging module, used to judge the target wireless side network element and the local Internet protocol access based on the information of the target wireless side network element Whether there is a reachable interface between the function realization units; the reporting module is used to report the interface capability to the core network mobility management unit according to the judgment result, so that the core network mobility management unit performs the update or release operation of the local Internet protocol access link according to the interface capability , where the interface capability is used to indicate whether there is a reachable interface between the target wireless side network element and the local Internet protocol access function implementation unit.

According to the present invention, the wireless side network element is used to judge whether there is an accessible interface between the target wireless side network element and the local IP access function realization unit according to the information of the target wireless side network element, and report the interface capability to the core network mobility management unit to facilitate core network mobility. The management unit performs the update or release operation of the local IP access link according to the interface capability, which solves the problem that the core network cannot judge whether there is an interface between the original wireless side network element and the target wireless side network element, and thus cannot realize the mobility of the local IP access connection problems, and then achieve local IP access mobility.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic structural diagram of an evolved packet domain system according to related technologies;

FIG. 2 is a schematic diagram 1 of accessing a core network by a wireless side network element according to related technologies;

FIG. 3 is a second schematic diagram of network elements on the wireless side accessing the core network according to related technologies;

FIG. 4 is a third schematic diagram of network elements on the wireless side accessing the core network according to related technologies;

Fig. 5 is a schematic diagram of data flow paths according to local IP access and traditional core network IP access according to related technologies;

Fig. 6 is a schematic diagram of the data flow path when the local IP access link moves according to the related art;

FIG. 7 is a flowchart of a mobility processing method according to an embodiment of the present invention;

FIG. 8 is an interactive flowchart of the first local IP access mobility processing method for the LTE system S1 handover process according to an embodiment of the present invention;

FIG. 9 is an interactive flowchart of the second local IP access mobility processing method during the S1 handover process of the LTE system according to an embodiment of the present invention;

FIG. 10 is an interactive flowchart of a local IP access mobility processing method during a GPRS system handover process according to an embodiment of the present invention;

FIG. 11 is an interactive flowchart of the first local IP access mobility processing method during the handover process of the LTE system X2 according to an embodiment of the present invention;

FIG. 12 is an interactive flow chart of the second local IP access mobility processing method during the handover process of the LTE system X2 according to an embodiment of the present invention;

Fig. 13 is a structural block diagram of a mobility processing device according to an embodiment of the present invention;

Fig. 14 is a preferred structural block diagram of a mobility processing device according to an embodiment of the present invention.

Detailed ways

Functional Overview

Considering the problem that the core network cannot determine whether there is an interface between the original wireless side network element and the target wireless side network element in the related art, so that the mobility of the local IP access connection cannot be realized, the embodiment of the present invention provides a mobility processing solution, Use the original wireless side network element to judge whether there is an accessible interface between it and the local IP access function realization unit according to the information of the target wireless side network element, and report the interface capability to the core network mobility management unit; the core network mobility management unit according to The interface capability updates or releases the local IP access link to achieve local IP access mobility.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

method embodiment

According to an embodiment of the present invention, a mobility processing method is provided. FIG. 7 is a flowchart of a mobility processing method according to an embodiment of the present invention, as shown in FIG. 7 , including the following steps S702 to S704:

Step S702, the original wireless side network element judges whether there is an accessible interface between the target wireless side network element and the local Internet protocol access function implementing unit according to the information of the target wireless side network element. Wherein, the original wireless side network element includes a home base station, a macro base station, a home base station gateway, and the like.

Wherein, the information of the target wireless side network element may include at least one of the following: a network element identifier, a closed user group identifier to which the network element belongs; the local Internet protocol access function implementing unit may include one of the following: the original wireless side network element (connected with the local network element) ingress gateway) or local access gateway (single configuration).

Step S704, the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result, so that the core network mobility management unit performs the update or release operation of the local Internet protocol access link according to the interface capability, wherein the interface capability is used for Indicates whether there is a reachable interface between the target wireless side network element and the local Internet protocol access function implementation unit.

Wherein, the above-mentioned core network mobility management unit may include one of the following: MME, SGSN, and the core network mobility management unit pre-stores the identification or address information of the local Internet protocol access function implementation unit, so as to perform local Internet access based on the identification or address information. The update or release operation of the protocol access link.

Specifically, the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result, including one of the following methods:

Mode 1: The original wireless side network element sends a handover request message to the core network mobility management unit according to the judgment result, and carries the interface capability therein.

Method 2: The original wireless side network element sends a relocation request message to the core network mobility management unit according to the judgment result, and carries the interface capability therein.

Mode 3: The original wireless side network element sends a handover request message carrying the interface capability to the target wireless side network element according to the judgment result, so that the target wireless side network element reports the interface capability to the core network mobility management unit through the path switching request message.

After the original wireless side network element reports the interface capability to the core network mobility management unit according to the judgment result, the above method further includes: the core network mobility management unit receives the interface capability, and judges the target wireless side network element and the local Internet protocol access according to the interface capability Whether there is an accessible interface between the function realization units; the core network mobility management unit performs an update or release operation of the local Internet protocol access link according to the judgment result.

Wherein, the core network mobility management unit performs the update or release operation of the local Internet protocol access link according to the judgment result, including: if the judgment result is yes, the core network mobility management unit performs the update operation of the local Internet protocol access link; If not, the core network mobility management unit executes the release operation of the local Internet protocol access link.

The implementation process of the embodiment of the present invention will be described in detail below with reference to examples.

Embodiment one

FIG. 8 is an interactive flowchart of the first local IP access mobility processing method for the LTE system S1 handover process according to an embodiment of the present invention. As shown in FIG. 8 , it includes the following steps from S802 to S818:

In step S802, the terminal periodically detects wireless signals of its own cell and other adjacent cells, and reports to the original wireless side network element in the form of a measurement report. When the original wireless side network element finds that the signal of the cell currently accessed by the terminal is lower than the threshold and cannot provide a connection for the user, it selects a target wireless side network element with suitable signal strength to initiate the S1 handover process.

In step S804, the original wireless side network element judges whether a reachable interface is configured between the original wireless side network element and the local IP access function implementing unit according to the information of the target wireless side network element. The information of the target wireless network element includes, but is not limited to, a network element identifier, a closed user group identifier to which the network element belongs, and the like. The local IP access function implementing unit may be: the original wireless side network element (co-located with the local access gateway) or the local access gateway (separately installed) (that is, the above step S702).

In step S806, the original wireless side network element reports the interface capability in the handover request message sent to the MME (that is, the above step S704).

In step S808, the MME determines whether to support LIPA mobility according to the interface capability indication, and instructs the target radio side network element to establish a corresponding radio bearer.

Step S810a, if the MME knows that there is a reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link can be supported, then the MME instructs the target wireless side network element to establish LIPA and the core network bearer. corresponding radio bearer.

Step S812a, the MME sends information such as the address of the local access gateway connected to the original wireless side network element, the uplink tunnel identifier of the access gateway, and the QoS parameters of the wireless bearer to be established in the handover request message sent to the target wireless side network element, Open the uplink channel for data transmission.

In step S814a, the target wireless side network element reserves resources for the LIPA bearer, and sends the address of the target wireless side network element and the downlink tunnel identifier to the MME through a handover confirmation message.

In step S816a, the MME notifies the original local access gateway of the wireless side network element address and downlink tunnel identifier through the bearer update process (that is, the update operation of the local Internet protocol access link), and opens the downlink channel for data transmission.

Step S810b, if the MME knows that there is no reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link cannot be supported, then the MME instructs the target wireless side network element to establish a core network bearer corresponding wireless bearer and release the original LIPA link.

In step S812b, the MME sends information such as the address of the core network access gateway, the identifier of the uplink tunnel, and the Qos parameters of the wireless bearer to be established in the handover request message sent to the target radio side network element, and opens the uplink channel for data transmission.

In step S814b, the target wireless side network element reserves resources for the bearer of the core network, and sends the address of the target wireless side network element and the downlink tunnel identifier to the MME through a handover confirmation message.

In step S816b, the MME releases the user's original LIPA link through the bearer deletion process (that is, the release operation of the local Internet protocol access link).

Step S818, continuing to complete the subsequent switching process.

Embodiment two

Fig. 9 is an interactive flow chart of the second local IP access mobility processing method in the LTE system S1 handover process according to an embodiment of the present invention. As shown in Fig. 9, at this time, the target wireless side network element implements the LIPA function through the new local access gateway Specifically include the following steps S902 to S918:

In step S902, the terminal periodically detects wireless signals of its own cell and other adjacent cells, and reports to the original wireless side network element in the form of a measurement report. When the original wireless side network element finds that the signal of the cell currently accessed by the terminal is lower than the threshold and cannot provide a connection for the user, it selects a target wireless side network element with suitable signal strength to initiate the S1 handover process.

Step S904, the original wireless side network element judges whether a reachable interface is configured between it and the local IP access function implementing unit according to the information of the target wireless side network element. The information of the target wireless network element includes, but is not limited to, a network element identifier, a closed user group identifier to which the network element belongs, and the like. The local IP access function implementing unit may be: the original wireless side network element (co-located with the local access gateway) or the local access gateway (separately installed).

Step S906, the original wireless side network element reports the interface capability in the handover request message sent to the MME.

In step S908, the MME determines whether to support LIPA mobility according to the interface capability indication, and instructs the target radio side network element to establish a corresponding radio bearer.

Step S910a, if the MME knows that there is a reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link can be supported, then the MME instructs the target wireless side network element to establish LIPA and the core network bearer. the corresponding radio bearer.

In step S912a, the MME establishes a LIPA session connection with the new local access gateway, and obtains an uplink tunnel identifier of the new local access gateway.

In step S914a, the MME sends information such as the address of the new local access gateway, the uplink tunnel identifier of the access gateway, and the QoS parameters of the radio bearer to be established in the handover request message sent to the target wireless side network element, and opens the uplink channel for data transmission.

In step S916a, the target wireless side network element reserves resources for the LIPA bearer, and sends the address of the target wireless side network element and the downlink tunnel identifier to the MME through a handover confirmation message.

In step S918a, the MME notifies the new local access gateway of the wireless side network element address and the downlink tunnel identifier through the bearer update process, and opens a downlink channel for data transmission.

Step S910b, if the MME knows that there is no reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link cannot be supported, then the MME instructs the target wireless side network element to establish a core network bearer corresponding wireless bearer and release the original LIPA link.

In step S912b, the MME sends information such as the address of the core network access gateway, the identifier of the uplink tunnel, and the Qos parameters of the wireless bearer to be established in the handover request message sent to the target wireless side network element, and opens the uplink channel for data transmission.

In step S914b, the target wireless side network element reserves resources for the core network bearer, and sends the address of the target wireless side network element and the downlink tunnel identifier to the MME through a handover confirmation message.

In step S916b, the MME releases the user's original LIPA link through a bearer deletion process.

Step S918, continue to complete the subsequent switching process.

Embodiment Three

Fig. 10 is an interactive flow chart of the local IP access mobility processing method in the GPRS system handover process according to an embodiment of the present invention, as shown in Fig. 10 , including the following steps S1002 to S1018:

Step S1002, the terminal periodically detects the wireless signals of the own cell and other adjacent cells, and reports to the original wireless side network element in the form of a measurement report. When the original wireless side network element finds that the signal of the cell currently accessed by the terminal is lower than the threshold and cannot provide a connection for the user, it selects a target wireless side network element with suitable signal strength to initiate the handover process.

Step S1004, the original wireless side network element judges whether a reachable interface is configured between the original wireless side network element and the local IP access function implementing unit according to the information of the target wireless side network element. The information of the target wireless network element includes, but is not limited to, a network element identifier, a closed user group identifier to which the network element belongs, and the like. The local IP access function implementing unit may be: the original wireless side network element (co-located with the local access gateway) or the local access gateway (separately installed).

Step S1006, the original wireless side network element reports the interface capability in the relocation request message sent to the SGSN.

In step S1008, the SGSN determines whether to support LIPA mobility according to the interface capability indication, and instructs the target radio side network element to establish a corresponding radio bearer.

In step S1010a, the SGSN learns that there is a reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link can be supported, and then the SGSN instructs the target wireless side network element to establish a link corresponding to LIPA and the core network bearer. wireless bearer.

In step S1012a, the SGSN sends the relocation request message to the target radio side network element to carry the parameters required by the RAB corresponding to the LIPA. Since LIPA link data is sent in the form of a direct tunnel, the SGSN also sends the original L-GGSN address and uplink tunnel identifier to the target wireless side network element to open up the uplink channel for data transmission.

Step S1014a, the target wireless side network element reserves resources for the LIPA bearer, and sends the RAB establishment status (such as which wireless bearers have not been established), the address of the target wireless side network element and the downlink tunnel identifier to the MME through the relocation request confirmation message.

In step S1016a, the SGSN notifies the original local access gateway of the wireless side network element address and the downlink tunnel identifier through the process of updating the PDP context, and opens up the downlink channel for data transmission.

Step S1010b, if the SGSN learns that there is no reachable interface between the original wireless side network element and the target wireless side network element, that is, the mobility of the LIPA link cannot be supported, then the SGSN instructs the target wireless side network element to establish the corresponding core network bearer wireless bearer and release the original LIPA link.

In step S1012b, the SGSN sends the relocation request message to the target radio side network element to carry information such as Qos parameters of the radio bearer to be established.

In step S1014b, the target radio side network element reserves resources for the bearer of the core network, and sends the establishment of the radio bearer to the SGSN through a relocation request confirmation message.

In step S1016b, the SGSN releases the original LIPA link of the user through the process of deleting the PDP context.

Step S1018, continue to complete the subsequent switching process.

Embodiment Four

Fig. 11 is an interactive flowchart of the first local IP access mobility processing method in the LTE system X2 handover process according to an embodiment of the present invention, as shown in Fig. 11 , including the following steps S1102 to S1122:

Step S1102, the terminal periodically detects the radio signals of its own cell and other neighboring cells, and reports to the original radio side network element in the form of a measurement report. When the original wireless side network element finds that the signal of the cell currently accessed by the terminal is lower than the threshold and cannot provide a connection for the user, it selects a target wireless side network element with suitable signal strength to initiate the X2 handover process.

In step S1104, the original wireless side network element judges whether a reachable interface is configured between the original wireless side network element and the local IP access function implementing unit according to the information of the target wireless side network element. The information of the target wireless network element includes, but is not limited to, a network element identifier, a closed user group identifier to which the network element belongs, and the like. The local IP access function implementing unit may be: the original wireless side network element (co-located with the local access gateway) or the local access gateway (separately installed).

Step S1106, since the original wireless side network element cannot know whether the user has activated the LIPA function at present, the handover request message sent to the target side network element carries interface capabilities, a list of all radio bearers to be established and their Qos parameters, and uplink Tunnel ID and gateway address.

If the original wireless side network element obtains the bearer type indication of the core network when establishing the wireless bearer, then the handover request message does not need to carry the interface capability and all the wireless bearer information to be established, and only needs to judge whether to It is enough for the network element to establish the LIPA radio bearer, which can be completed by adjusting the content of the radio bearer list to be established. Subsequent processing of the core network can be completed according to the existing technology.

In step S1108, the network element at the target wireless side establishes a corresponding air interface bearer according to the received bearer information, and informs the target side that resource reservation is successful through a handover request confirmation message.

Step S1110, the original wireless side network element instructs the air interface synchronization process from the terminal to the target wireless side network element through an RRC layer message.

In step S1112, the terminal informs the target wireless side network element that air interface synchronization is successful through a handover confirmation message, and at this time, the target wireless side network element can forward buffered data.

Step S1114, the target wireless side network element reports the address of the target side network element and downlink tunnel identification information to the MME through a path switching request message. The interface capability is also transmitted in this message, and the MME judges whether to update or delete the LIPA bearer according to the interface capability.

Step S1116a, if there is an interface between the target network element and the local IP access function implementing unit, then the MME updates the LIPA bearer synchronously.

In step S1118a, the MME reports the address of the target wireless side network element and downlink tunnel identification information to the local access gateway through the bearer update process, and opens up a downlink channel for data transmission.

Step S1116b, if there is no interface between the target network element and the local IP access function implementation unit, then the MME only updates the core network bearer and releases the LIPA link.

In step S1118b, the MME deletes all LIPA bearers of the user through a bearer deletion process.

In step S1120, the MME confirms the success of the path switching through the path switching request confirmation message. If some bearers on the core network side are not established, for example, the LIPA bearer is deleted when there is no interface, then this message is also used to instruct the corresponding bearer on the wireless side to be deleted.

Step S1122, continue to complete the subsequent switching process.

Embodiment five

Fig. 12 is an interactive flow chart of the second local IP access mobility processing method in the LTE system X2 handover process according to an embodiment of the present invention. As shown in Fig. 12 , it includes the following steps from S1202 to step S1222:

Step S1202, the terminal periodically detects the radio signals of its own cell and other adjacent cells, and reports to the original radio side network element in the form of a measurement report. When the original wireless side network element finds that the signal of the cell currently accessed by the terminal is lower than the threshold and cannot provide a connection for the user, it selects a target wireless side network element with suitable signal strength to initiate the X2 handover process.

In step S1204, the original wireless side network element judges whether a reachable interface is configured between the original wireless side network element and the local IP access function implementing unit according to the information of the target wireless side network element. The information of the target wireless network element includes, but is not limited to, a network element identifier, a closed user group identifier to which the network element belongs, and the like. The local IP access function implementing unit may be: the original wireless side network element (co-located with the local access gateway) or the local access gateway (separately installed).

Step S1206, since the original wireless side network element cannot know whether the user has activated the LIPA function at present, the handover request message sent to the target side network element carries interface capabilities, a list of all radio bearers to be established and their Qos parameters, and uplink Tunnel ID and gateway address.

If the original wireless side network element obtains the bearer type indication of the core network when establishing the wireless bearer, then the handover request message does not need to carry the interface capability and all the wireless bearer information to be established, and only needs to judge whether to It is enough for the network element to establish the LIPA radio bearer, which can be completed by adjusting the content of the radio bearer list to be established. Subsequent processing of the core network can be completed according to the existing technology.

In step S1208, the network element at the target wireless side establishes a corresponding air interface bearer according to the received bearer information, and informs the target side that resource reservation is successful through a handover request confirmation message.

Step S1210, the original wireless side network element instructs the air interface synchronization process from the terminal to the target wireless side network element through an RRC layer message.

In step S1212, the terminal informs the target wireless side network element that air interface synchronization is successful through a handover confirmation message, and at this time, the target wireless side network element can forward buffered data.

Step S1214, the target wireless side network element reports the address of the target side network element and downlink tunnel identification information to the MME through a path switching request message. The interface capability is also transmitted in this message, and the MME judges whether to update or delete the LIPA bearer according to the interface capability.

Step S1216a, if there is an interface between the target network element and the local IP access function implementation unit, then the MME modifies the LIPA bearer synchronously.

In step S1218a, the MME reports the address of the target wireless side network element and the downlink tunnel identification information to the local access gateway through a bearer update process, and opens up a downlink channel for data transmission. At this point a relocation of the local services gateway is sent.

Step S1216b, if there is no interface between the target network element and the local IP access function implementation unit, then the MME only modifies the bearer of the core network to release the LIPA link.

In step S1218b, the MME deletes all LIPA bearers of the user through a bearer deletion process.

In step S1220, the MME confirms the success of the path switching through the path switching request confirmation message. If some bearers on the core network side are not established, for example, the LIPA bearer is deleted when there is no interface, then this message is also used to instruct the corresponding bearer on the wireless side to be deleted.

Step S1222, continue to complete the subsequent switching process.

Through the above-mentioned embodiments of the present invention, the original wireless side network element is used to judge whether there is an accessible interface between the original wireless side network element and the local IP access function realization unit according to the information of the target wireless side network element, and report the interface capability to the core network mobility management unit ; The core network mobility management unit performs the update or release operation of the local IP access link according to the interface capability, thereby realizing the local IP access mobility.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

Device embodiment

According to an embodiment of the present invention, a mobility processing device is provided, which is used to implement the above mobility processing method. FIG. 13 is a structural block diagram of a mobility processing device according to an embodiment of the present invention. As shown in FIG. 13 , the device includes: a judging module 131 and a reporting module 132 . The above structure is described below.

The judging module 131 is used to judge whether there is an accessible interface between the target wireless side network element and the local Internet protocol access function realization unit according to the information of the target wireless side network element; the reporting module 132 is connected to the judging module 131 and is used to The judgment result of 131 reports the interface capability to the core network mobility management unit, so that the core network mobility management unit performs an update or release operation of the local Internet protocol access link according to the interface capability, wherein the interface capability is used to indicate the target wireless side network element and Whether there is a reachable interface between the local Internet protocol access function implementation units.

FIG. 14 is a preferred structural block diagram of a mobility processing device according to an embodiment of the present invention. As shown in FIG. 14 , the reporting module further includes: a first sending sub-module 141 , a second sending sub-module 142 , and a third sending sub-module 143 . The above structure will be described in detail below.

The first sending submodule 141 is connected to the judging module 131, and is used to send a handover request message to the core network mobility management unit according to the judging result of the judging module 131, and carries the interface capability therein; the second sending submodule 142 is connected to The judging module 131 is used to send a relocation request message to the core network mobility management unit according to the judging result of the judging module 131, and carries the interface capability therein; the third sending submodule 143 is connected to the judging module 131 and is used to judge according to the The judgment result of module 131 sends a handover request message carrying the interface capability to the target wireless side network element, so that the target wireless side network element reports the interface capability to the core network mobility management unit through the path switching request message.

It should be noted that, in the process of actual application, according to the judgment result of the judging module 131, the reporting module 132 can select one of the first sending sub-module 141, the second sending sub-module 142, and the third sending sub-module 143 Execute the operation of sending the message carrying the interface capability to the target wireless side network element.

For the core network mobility management unit, the identification or address information of the local Internet protocol access function implementing unit may be stored in advance, so as to update or release the local Internet protocol access link according to the identification or address information.

Specifically, after the reporting module 132 reports the interface capability to the core network mobility management unit according to the judgment result, the core network mobility management unit receives the interface capability, and judges the target wireless side network element and the local Internet protocol access function implementation unit according to the interface capability Whether there is a reachable interface between them; if the judgment result is yes, then the core network mobility management unit executes the update operation of the local Internet protocol access link; if the judgment result is no, then the core network mobility management unit executes the local Internet protocol access link release operation.

In summary, through the above embodiments of the present invention, the original wireless side network element is used to judge whether there is an accessible interface between the original wireless side network element and the local IP access function realization unit according to the information of the target wireless side network element, and report the interface capability to the core The network mobility management unit; the core network mobility management unit updates or releases the local IP access link according to the interface capability, thereby realizing the local IP access mobility.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a mobility treating method is characterized in that, comprising:

Former wireless side network element judges according to the information of Target Wireless side network element that described Target Wireless side network element and local internet protocol access function realize whether existing between the unit can reach interface;

Described former wireless side network element reports interface capability according to judged result to the core network mobility administrative unit, so that described core network mobility administrative unit is carried out the renewal or the releasing operation of local internet protocol access links according to described interface capability, wherein, described interface capability is used to indicate described Target Wireless side network element and described local internet protocol access function to realize whether there is the described interface that reaches between the unit.

2. method according to claim 1 is characterized in that, described former wireless side network element reports described interface capability to comprise according to described judged result to described core network mobility administrative unit:

Described former wireless side network element sends handoff request message according to described judged result to described core network mobility administrative unit, and carries described interface capability therein; Perhaps

Described former wireless side network element sends RELOCATION REQUEST message according to described judged result to described core network mobility administrative unit, and carries described interface capability therein; Perhaps

Described former wireless side network element sends the handoff request message that carries described interface capability according to described judged result to described Target Wireless side network element, so that described Target Wireless side network element reports described core network mobility administrative unit by path exchange request message with described interface capability.

3. method according to claim 1 is characterized in that, after described core network mobility administrative unit reported described interface capability, described method also comprised described former wireless side network element according to described judged result:

Described core network mobility administrative unit receives described interface capability, and judges according to described interface capability described Target Wireless side network element and described local internet protocol access function realize whether there is the described interface that reaches between the unit;

Described core network mobility administrative unit is carried out the renewal or the releasing operation of described local internet protocol access links according to described judged result.

4. method according to claim 3 is characterized in that, renewal or releasing operation that described core network mobility administrative unit is carried out described local internet protocol access links according to described judged result comprise:

If judged result is for being, then described core network mobility administrative unit is carried out the renewal operation of described local internet protocol access links;

If judged result is that then described core network mobility administrative unit is not carried out the releasing operation of described local internet protocol access links.

5. method according to claim 1, it is characterized in that, described core network mobility administrative unit is preserved sign or the address information that described local internet protocol access function realizes the unit in advance, so that carry out the renewal or the releasing operation of local internet protocol access links according to described sign or described address information.

6. according to each described method in the claim 1 to 5, it is characterized in that it is one of following that described local internet protocol access function realizes that the unit comprises:

Local service gateway, local access network close.

7. according to each described method in the claim 1 to 5, it is characterized in that it is one of following that described former wireless side network element comprises:

Home eNodeB, macro base station, femto gateway.

One of 8. according to each described method in the claim 1 to 5, it is characterized in that, below the information of described Target Wireless side network element comprises at least:

Closed user group id under network element ID, the network element.

9. according to each described method in the claim 1 to 5, it is characterized in that it is one of following that described core network mobility administrative unit comprises:

Mobility Management Entity, service universal grouping wireless business supporting node.

10. a mobility processing unit is characterized in that, comprising:

Judge module is used for judging according to the information of Target Wireless side network element that described Target Wireless side network element and local internet protocol access function realize whether existing between the unit and can reaches interface;

Reporting module, be used for reporting interface capability to the core network mobility administrative unit according to judged result, so that described core network mobility administrative unit is carried out the renewal or the releasing operation of local internet protocol access links according to described interface capability, wherein, described interface capability is used to indicate described Target Wireless side network element and described local internet protocol access function to realize whether there is the described interface that reaches between the unit.

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