WO2016192381A1

WO2016192381A1 - Processing method and device for bearer establishment and base station handover

Info

Publication number: WO2016192381A1
Application number: PCT/CN2015/098404
Authority: WO
Inventors: 李志军; 谢宝国
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-05
Filing date: 2015-12-23
Publication date: 2016-12-08
Also published as: CN106304160A; CN106304160B

Abstract

Provided in the present invention are a processing method and device for bearer establishment and base station handover, wherein the processing method for bearer establishment comprises: acquiring, by an MME, failure information of a backhaul link between a base station and a core network device; receiving, by the MME, request information for establishing a bearer for a terminal; and determining, by the MME and according to the failure information of the backhaul link, whether to allow establishment of a bearer. The present invention addresses a problem in related art of incorrect permission of establishing a corresponding bearer caused by the inability of an MME to acquire a condition of a backhaul link between a base station and a core network. In addition, the present invention enables an MME to detect a failure of a backhaul link between an eNodeB and a core network, and subsequently determines whether to allow the establishment of the corresponding bearer according to the condition of the backhaul link.

Description

Bearer creation, base station switching processing method and device

Technical field

The present invention relates to the field of communications, and in particular, to a bearer creation, base station handover processing method and apparatus.

Background technique

Compared with the traditional Circuit Switch (CS) network, the Packet Switch (PS) network provides the data transmission capability based on the Internet Protocol (IP). , higher data transfer rate.

Long-Term Evolution (LTE)/System Architecture Evolution (SAE) is a new generation of wireless communication technology (commonly known as 4G) whose main purpose is to provide high-speed data services. Figure 1 is a schematic diagram of an LTE/SAE network architecture. The functions of each part of the network element are as follows:

A user equipment (UE) is also called a user equipment. The user equipment accesses the base station through a wireless air interface and accesses the core network. Before the terminal accesses the core network, it needs to be authenticated by the core network. After the core network is registered, the terminal can have two states: idle state and connected state. In the idle state, the terminal and the base station are not connected. In the connected state, the terminal is connected to the base station and can send and receive data.

An evolved NodeB (Evolved NodeB, referred to as eNodeB) is a base station system in an LTE network, and provides radio resources for terminal access, and the control plane and the mobile management unit communicate with each other through the S1-AP interface, and the user plane and the service gateway pass. The S1-U interfaces are interconnected. The eNodeB informs the terminal of the current cell information by broadcasting.

The Mobility Management Entity (MME) is a control plane entity in the LTE network and is responsible for user access authentication, mobility management, bearer management, etc., and temporarily stores the context in which the terminal is attached to the network.

The serving gateway (Serving Gateway, SGW for short) provides the anchor of the terminal in 2G\3G and LTE mobility, and the SGW can also page the terminal through the MME if the terminal is in the idle state.

A PDN gateway (PDW Gateway, PGW for short), the terminal accesses the service network through the PGW. The PGW allocates an IP address to the terminal and manages the QoS of the bearer.

The Home Subscriber Server (HSS) is used to manage user subscription data and register the current terminal on the network.

Policy and Charging Rule Function (PCRF) is responsible for providing policy control and charging rules for PGW.

In the architecture shown in Figure 1, there are two communication links from the base station to the core network. One is an S1-AP interface between the eNodeB and the MME for transmitting control plane signaling data. This link is usually a control plane link or a signaling plane link. The other is the S1-U interface between the eNodeB and the SGW, which is used to transmit user plane data. This link is usually called user plane. link.

In some accident situations, the backhaul link between the base station and the core network may be faulty, resulting in disconnection of the backhaul link or limited connection. For example, the control plane link and the user plane link are all invalid. The control plane link is valid and the user plane link is invalid, the control plane link is valid, and the user plane link is limited, and the like.

When the backhaul link between the base station and the core network is completely disconnected, the data service cannot be obtained at this time, and the terminal can only implement limited public safety services through direct communication between the terminals. When the control plane link between the base station and the core network is normal but the user plane link is disconnected, some services that transmit service data based on the control plane link can still be supported, such as short message service and location service. If the control plane link between the base station and the core network is normal but the user plane link can only provide limited data transmission, such as small bandwidth data transmission, some small bandwidth services can still be supported, for example: instant messaging. Class business.

In the above case, the core network mobility management network element MME cannot know the backhaul link failure between the base station and the core network, that is, the MME cannot know the backhaul link problem between the eNodeB and the SGW, which will cause the MME to allocate a bearer to the user. The bearer setup request of the terminal and the network is erroneously received, but these bearers may eventually be rejected by the base station eNodeB because the user plane link access between the eNodeB and the SGW is limited at this time. In addition, since the MME cannot know the backhaul link failure between the eNodeB and the SGW, when the handover occurs, the MME cannot know whether the backhaul link between the target eNodeB and the target SGW is faulty, and the handover cannot be completed, or the handover cannot be performed after the handover to the target base station. create.

For the related art, the MME cannot know the situation of the backhaul link between the base station and the core network, and causes an error to allow the creation of the corresponding bearer. An effective solution has not been proposed.

Summary of the invention

The present invention provides a bearer creation, base station handover processing method and apparatus, to at least solve the problem that the MME cannot know the backhaul link between the base station and the core network in the related art, and causes an error to allow the corresponding bearer to be created.

According to an aspect of the embodiments of the present invention, a bearer creation processing method is provided, including: a mobility management unit MME acquiring backhaul link fault information between a base station and a core network device; and the MME receiving request information for creating a bearer for the terminal The foregoing MME determines whether to allow the creation of the bearer according to the backhaul link failure information described above.

Optionally, the backhaul link fault information includes at least one of the following: a first information indicating that the user plane link is disconnected, and second information indicating that the user plane link bandwidth is limited.

Optionally, the determining, by the MME, whether to allow the foregoing bearer to be created according to the foregoing backhaul link failure information includes: when the backhaul link failure information is the first information, the MME prohibits the creation of the bearer; or, in the foregoing backhaul link failure When the information is the second information, the MME creates a bearer corresponding to the specified bandwidth requirement corresponding to the second information according to the information that the user plane link bandwidth is limited.

Optionally, the manner in which the mobility management unit MME acquires the backhaul link fault information between the base station and the core network device includes at least one of: obtaining the backhaul link fault information from the notification message sent by the base station, where The notification message is an overload initiation message or other S1 interface message; the foregoing backhaul link failure information is obtained from the radio bearer assignment response message sent by the base station; and the backhaul link is obtained from the bearer creation response message sent by the core network device. The fault information, where the bearer creation response message is a response message to the bearer creation request sent by the MME.

Optionally, the determining, by the MME, whether to allow the foregoing bearer to be created according to the foregoing backhaul link fault information further includes: the MME receiving, by the MME, indication information indicating whether the base station enters an isolated public safety network mode; and the MME is configured according to the backhaul link fault information. And the above indication information determines whether the above bearer is allowed to be created.

Optionally, the foregoing core network device is a serving gateway.

According to another aspect of the present invention, another bearer creation processing method is further provided, that is, the base station sends backhaul link fault information between the base station and the core network device to the mobility management unit MME; The backhaul link failure information is used by the MME to determine whether to allow the bearer to be created for the terminal.

Optionally, the sending, by the base station, the backhaul link fault information between the base station and the core network device to the mobility management unit MME further includes: sending, by the base station, an indication to the MME to indicate whether the base station enters an isolated public safety network mode The information of the backhaul link failure information and the foregoing indication information is determined by the MME to determine whether to allow the bearer to be created for the terminal.

Optionally, the foregoing core network device is a serving gateway.

According to an aspect of the embodiments of the present invention, a bearer creation processing device is provided, which is applied to a mobility management unit MME, where the device includes: an acquiring module, configured to acquire backhaul link fault information between a base station and a core network device; The receiving module is configured to receive request information for creating a bearer for the terminal, and the determining module is configured to determine, according to the backhaul link fault information, whether to allow the bearer to be created.

Optionally, the determining module is further configured to prohibit the creation of the bearer when the backhaul link fault information is the first information, or when the backhaul link fault information is the second information, according to the user plane chain. The information with limited bandwidth of the road creates a bearer corresponding to the specified bandwidth requirement corresponding to the second information.

Optionally, the acquiring module is further configured to: obtain the backhaul link fault information from the notification message sent by the base station, where the notification message is an overload initiation message or other S1 interface message; or, sent from the base station Obtaining the backhaul link fault information in the radio bearer assignment response message; or acquiring the backhaul link fault information from the bearer creation response message sent by the core network device, where the bearer creation response message is a bearer sent to the MME Create a response message for the request.

Optionally, the acquiring module is further configured to receive indication information for indicating whether the base station enters an isolated public safety network mode, where the determining module is further configured to determine, according to the backhaul link failure information and the indication information, whether to allow the foregoing bearer to be created. .

Optionally, the foregoing core network device is a serving gateway.

According to another aspect of the present invention, another bearer creation processing apparatus is further provided, which is applied to a base station, where the apparatus includes: a sending module, configured to send backhaul link fault information between the base station and a core network device. And the mobility management unit MME; wherein the backhaul link failure information is determined by the MME to determine whether to allow the bearer to be created for the terminal.

Optionally, the sending module is further configured to send, to the MME, indication information that is used to indicate whether the base station enters an isolated public safety network mode, where the backhaul link failure information and the indication information are determined by the MME to be allowed as a terminal. Create a basis for the bearer.

Optionally, the foregoing core network device is a serving gateway.

According to another aspect of the present invention, a base station handover processing method is further provided, including: the mobility management unit MME acquires backhaul link fault information between the base station and the core network device; and the MME receiving terminal is switched by the source base station to a handover request of the target base station; the MME determines whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station.

Optionally, the determining, by the MME, whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station includes: when the backhaul link failure information of the target base station is the first information, the MME prohibits the terminal Switching to the target base station; or, when the backhaul link failure information of the target base station is the second information, the MME matches the specified bandwidth corresponding to the second information according to the information of the user plane link bandwidth limitation. The required bearer is switched to the above target base station.

Optionally, the determining, by the MME, whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station, further comprising: receiving, by the MME, indication information indicating whether the target base station enters an isolated public safety network mode; The MME determines whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station and the indication information.

Optionally, the foregoing core network device is a serving gateway.

According to another aspect of the present invention, a base station handover processing apparatus is further provided, which is applied to a mobility management unit MME, where the apparatus includes: an acquisition module, configured to acquire a backhaul link fault between the base station and the core network device. The receiving module is configured to receive a handover request of the terminal to be switched by the source base station to the target base station, and the determining module is configured to determine, according to the backhaul link failure information of the target base station, whether to allow the terminal to switch to the target base station.

Optionally, the determining module is further configured to: when the backhaul link fault information of the target base station is the first information, Disabling the terminal to switch to the target base station; or, when the backhaul link failure information of the target base station is the second information, matching the designation corresponding to the second information according to the information that the user plane link bandwidth is limited The bearer of the bandwidth requirement is switched to the above target base station.

Optionally, the acquiring module is further configured to receive indication information for indicating whether the target base station enters an isolated public safety network mode, where the determining module determines whether to allow the terminal according to the backhaul link failure information of the target base station and the indication information. Switch to the above target base station.

Optionally, the foregoing core network device is a serving gateway.

The MME obtains the backhaul link fault information between the base station and the core network device by using the MME; the MME receives the request information for the terminal to create the bearer; and the MME determines whether the bearer is allowed to be created according to the backhaul link fault information. The problem that the MME cannot know the backhaul link between the base station and the core network in the related art is solved, and the problem that the corresponding bearer is allowed to be created is caused by an error. The MME can detect the backhaul link failure between the base station eNodeB and the core network, and then decide whether to allow the creation of the corresponding bearer according to the backhaul link situation.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of an LTE/SAE network architecture;

2 is a flowchart of a bearer creation processing method according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of a bearer creation processing apparatus according to an embodiment of the present invention; FIG.

4 is a flowchart (1) of a bearer creation processing method according to an embodiment of the present invention;

FIG. 5 is a structural block diagram (1) of a bearer creation processing apparatus according to an embodiment of the present invention; FIG.

6 is a flowchart of a bearer creation processing method according to an embodiment of the present invention;

FIG. 7 is a structural block diagram of a bearer creation processing apparatus according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a base station notifying an MME of a backhaul link failure or limitation according to an embodiment of the present invention; FIG.

9 is a schematic diagram of a base station notifying a MME of a backhaul link failure or limitation in a bearer setup procedure according to an embodiment of the present invention;

10 is a schematic diagram of a SGW notifying a mobility management network element of a backhaul link failure or limitation in a bearer setup procedure according to an embodiment of the present invention;

11 is a schematic diagram of a base station simultaneously notifying an MME to enter an isolated network mode according to an embodiment of the present invention;

FIG. 12 is an MME, according to the backhaul link fault information and IOPS mode information of a base station, according to an embodiment of the present invention. A schematic diagram of whether to allow a UE to handover from a source base station to a target base station.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In this embodiment, a bearer creation processing method is provided. FIG. 2 is a flowchart of a bearer creation processing method according to an embodiment of the present invention. As shown in FIG. 2, the flow includes the following steps:

Step S202, the mobility management unit MME acquires backhaul link fault information between the base station and the core network device.

Step S204: The MME receives request information for creating a bearer for the terminal.

Step S206, the MME determines, according to the backhaul link failure information, whether to allow the bearer to be created.

Through the foregoing steps, the MME can obtain the backhaul link fault information between the base station and the core network device, and further determine whether to allow the bearer to be created for the terminal to be created according to the backhaul link fault information, compared to the related technology, because the MME The problem of the backhaul link between the eNodeB and the SGW is not known, which will cause the MME to incorrectly receive the bearer setup request of the terminal and the network when the bearer is allocated for the user, but these bearers may be rejected by the base station eNodeB. The above steps solve the related technology. The MME cannot know the situation of the backhaul link between the base station and the core network, and causes an error to allow the creation of the corresponding bearer. The MME can detect the backhaul link failure between the base station eNodeB and the core network, and then decide whether to allow the creation of the corresponding bearer according to the backhaul link situation.

The above-mentioned backhaul link failure information may include a variety of information, which will be exemplified below. In an optional embodiment, the backhaul link failure information may be first information used to indicate that the user plane link is disconnected, or may be second information used to indicate that the user plane link bandwidth is limited.

The foregoing step S206 involves the MME determining whether to allow the bearer to be created according to the backhaul link fault information. In an optional embodiment, when the backhaul link fault information is the first information, the MME prohibits the creation of the bearer. In another optional embodiment, when the backhaul link failure information is the foregoing second information, the MME creates a bearer that meets the specified bandwidth requirement corresponding to the second information according to the information that the user plane link bandwidth is limited. In turn, the MME determines whether to allow the created bearer to be created according to the backhaul link failure information.

The foregoing step S202 involves the mobility management unit MME acquiring the backhaul link fault information between the base station and the core network device. It should be noted that the MME can obtain the backhaul link fault between the base station and the core network device in multiple manners. Information, which is illustrated below. In an optional embodiment, the backhaul link failure information may be obtained from a notification message sent by the base station, where the notification message is an overload initiation message or other S1 interface message. In another optional embodiment, the backhaul link failure information may also be obtained from a radio bearer assignment response message sent by the base station. In still another optional embodiment, the backhaul link failure information may be obtained from the bearer creation response message sent by the core network device, where the bearer creation response message is a response message to the bearer creation request sent by the MME.

When the MME determines whether to allow the foregoing bearer to be created according to the backhaul link failure information, in an optional embodiment, the MME Receiving indication information for indicating whether the base station enters the isolated public safety network mode, and determining, by the MME, whether to allow the foregoing bearer to be created according to the backhaul link failure information and the indication information.

In an optional embodiment, the core network device is a serving gateway.

In this embodiment, a bearer creation processing device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 3 is a structural block diagram of a bearer creation processing apparatus according to an embodiment of the present invention, which is applied to a mobility management unit MME. As shown in FIG. 3, the apparatus includes: an obtaining module 32, configured to acquire between a base station and a core network device. The backhaul link failure information; the receiving module 34 is configured to receive request information for creating a bearer for the terminal; and the determining module 36 is configured to determine whether to allow the bearer to be created according to the backhaul link fault information.

Optionally, the determining module 36 is further configured to prohibit the creation of the bearer when the backhaul link failure information is the first information; or, when the backhaul link failure information is the second information, according to the user polygon chain The road bandwidth limited information creates a bearer corresponding to the specified bandwidth requirement corresponding to the second information.

Optionally, the obtaining module 32 is further configured to: obtain the backhaul link failure information from the notification message sent by the base station, where the notification message is an overload initiation message or other S1 interface message; or the radio bearer sent from the base station Acquiring the backhaul link failure information in the assignment response message; or acquiring the backhaul link failure information from the bearer creation response message sent by the core network device, where the bearer creation response message is a bearer creation request sent to the MME Response message.

Optionally, the obtaining module 32 is further configured to receive indication information for indicating whether the base station enters an isolated public safety network mode; the determining module 36 is further configured to determine, according to the backhaul link failure information and the indication information, whether to allow the generation of the bearer. .

Optionally, the core network device is a serving gateway.

It should be noted that the foregoing modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the obtaining module 32, the receiving module 34, and the determining module 36 are all located in the same processor. Or, the obtaining module 32, the receiving module 34, and the determining module 36 are respectively located in the first processor, the second processor, and the third processor.

In another embodiment, another bearer creation processing method is provided. FIG. 4 is a flowchart (1) of a bearer creation processing method according to an embodiment of the present invention. As shown in FIG. 4, the flow includes the following steps:

Step S402: The base station sends the backhaul link fault information between the base station and the core network device to the mobility management unit MME. The backhaul link fault information is used by the MME to determine whether to allow the bearer to be created for the terminal.

Through the above steps, the base station sends the backhaul link fault information between the base station and the core network device to the MME, and further The MME may determine, according to the backhaul link failure information, whether to create a bearer for the terminal to create a request. Compared with the related art, the MME may not be aware of the backhaul link problem between the eNodeB and the SGW, which may cause the MME to allocate a bearer to the user. The bearer setup request of the terminal and the network is incorrectly received, but the bearers may be rejected by the base station eNodeB. The foregoing steps solve the problem that the MME cannot know the backhaul link between the base station and the core network in the related art, and the error is allowed. Create a problem with the corresponding hosting. The MME can detect the backhaul link failure between the base station eNodeB and the core network, and then decide whether to allow the creation of the corresponding bearer according to the backhaul link situation.

The backhaul link fault information may include multiple information. In an optional embodiment, the backhaul link fault information may include first information for indicating that the user plane link is disconnected, and may further include indicating the user face chain. The second information with limited bandwidth.

In an optional embodiment, when the base station sends the backhaul link fault information between the base station and the core network device to the mobility management unit MME, the base station sends a signaling to the MME to indicate whether the base station enters an isolated public safety network mode. The indication information; wherein the backhaul link failure information and the indication information are used by the MME to determine whether to allow the bearer to be created for the terminal.

In an optional embodiment, the core network device is a serving gateway.

FIG. 5 is a structural block diagram (1) of a bearer creation processing apparatus according to an embodiment of the present invention, applied to a base station, as shown in FIG. 5, the apparatus includes: a sending module 52, configured to be between the base station and a core network device. The backhaul link failure information is sent to the mobility management unit MME; wherein the backhaul link failure information is a basis for the MME to determine whether to allow the bearer to be created for the terminal.

Optionally, the backhaul link failure information includes at least one of the following: a first information indicating that the user plane link is disconnected, and second information indicating that the user plane link bandwidth is limited.

Optionally, the sending module 52 is further configured to send, to the MME, indication information for indicating whether the base station enters an isolated public safety network mode, where the backhaul link failure information and the indication information are used by the MME to determine whether to allow the bearer to be created for the terminal. .

Optionally, the core network device is a serving gateway.

A base station handover processing method is provided in this embodiment. FIG. 6 is a flowchart of a bearer creation processing method according to an embodiment of the present invention. As shown in FIG. 6, the flow includes the following steps:

Step S602, the mobility management unit MME acquires backhaul link fault information between the base station and the core network device.

Step S604, the MME receives a handover request that the terminal switches from the source base station to the target base station;

Step S606, the MME determines, according to the backhaul link failure information of the target base station, whether to allow the terminal to handover to the target base station.

Through the above steps, the MME receives the handover request of the terminal from the source base station to the target base station, and determines whether to allow the terminal to switch to the target base station based on the received backhaul link failure information.

The above backhaul link failure information may include a variety of information, which will be exemplified below. In an optional embodiment, the backhaul link failure information may be first information used to indicate that the user plane link is disconnected, or may be second information used to indicate that the user plane link bandwidth is limited.

The foregoing step S606 involves the MME determining whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station. In an optional embodiment, when the backhaul link failure information of the target base station is the first information, the MME The terminal is prohibited from switching to the target base station. In another optional embodiment, when the backhaul link failure information of the target base station is the second information, the MME switches the bearer corresponding to the specified bandwidth requirement corresponding to the second information according to the information of the user plane link bandwidth limitation. To the target base station.

The foregoing step S606 involves the MME determining whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station. In an optional embodiment, the MME receives the indication information for indicating whether the target base station enters the isolated public safety network mode. The MME determines whether to allow the terminal to switch to the target base station according to the backhaul link failure information and the indication information of the target base station.

In an optional embodiment, the core network device is a serving gateway.

FIG. 7 is a structural block diagram of a bearer creation processing apparatus according to an embodiment of the present invention, which is applied to a mobility management unit MME. As shown in FIG. 7, the apparatus includes: an obtaining module 72, configured to acquire between a base station and a core network device. The backhaul link failure information; the receiving module 74 is configured to receive a handover request of the terminal to be switched by the source base station to the target base station; and the determining module 76 is configured to determine, according to the backhaul link failure information of the target base station, whether to allow the terminal to switch to the target base station. .

Optionally, the determining module 76 is further configured to prohibit the terminal from switching to the target base station when the backhaul link failure information of the target base station is the first information; or the backhaul link failure information at the target base station is the second In the information, according to the information that the user plane link bandwidth is limited, the bearer corresponding to the specified bandwidth requirement corresponding to the second information is switched to the target base station.

Optionally, the obtaining module 72 is further configured to receive indication information for indicating whether the target base station enters an isolated public safety network mode; the determining module 76 determines, according to the backhaul link failure information of the target base station, the indication information, whether to allow the terminal to switch. To the target base station.

Further, the core network device is a serving gateway.

For the above problems existing in the related art, the following description will be made in conjunction with specific alternative embodiments.

8 is a schematic diagram of a base station notifying a MME of a backhaul link failure or limitation according to an embodiment of the present invention. After detecting a backhaul link failure or limitation, the base station eNodeB actively notifies the mobility management network element MME, so that the MME can be based on the backhaul link. In the case, a decision is made on the terminal and the network-initiated bearer creation request.

As shown in Figure 8, the following steps are included:

Step S801, the backhaul link between the eNodeB and the SGW is faulty, causing the S1-U connection to be disconnected, or the bandwidth is limited;

Step S802, the eNodeB detects that the backhaul link with the SGW is faulty;

Step S803, the eNodeB sends a notification message to the MME to notify the backhaul link failure information;

According to the specific situation of the backhaul link failure, the backhaul link failure information may be a backhaul link failure indication:

The user plane link is disconnected; or, the user plane link bandwidth is limited;

Specifically, when the bandwidth of the user plane link is limited, the eNodeB may also carry a specific value, the specific bandwidth of the current user plane backhaul link, or the maximum bandwidth per bearer that the eNodeB can receive.

The eNodeB can use the Overload Start to carry backhaul link failure information or use other suitable S1 interface messages.

After obtaining the backhaul link fault information, the MME stores the following information locally: the eNodeB identifier, the SGW identifier, and the eNodeB-SGW backhaul link fault information. After the bearer is created for the terminal, the MME can use the backhaul link fault information to make a decision on the bearer creation.

Step S804, the MME returns a notification response to the eNodeB.

Steps S805a/S805b, after which the MME receives a PDN connection request or a bearer creation request. The PDN connection request and the bearer creation request may be initiated by the UE side or initiated by the network side. According to the request, the MME will create a PDN connection for the UE or create a bearer of the specified bandwidth;

Step S806, the MME determines, according to the backhaul link information, whether to create the required bearer.

Specifically, the MME may perform the following determination according to the backhaul link failure information between the eNodeB and the SGW:

If the backhaul link is disconnected, the creation of the corresponding bearer is rejected;

If the backhaul link is limited, it is determined according to the limited condition whether the bearer of the specified bandwidth requirement is allowed to be created;

Before making this determination, the MME first determines that the terminal is located under the eNodeB and is allocated to the SGW.

Step S807, the MME sends a bearer setup request to the SGW/PGW.

Step S808, the SGW/PGW establishes a corresponding bearer according to the request, and returns a bearer setup response.

Step S809, the MME sends a radio bearer assignment request to the eNodeB, requesting the eNodeB to establish a corresponding radio bearer according to the request;

Step S810, the eNodeB establishes a radio bearer according to the radio resource condition, and returns a radio bearer assignment response.

In this step, the eNodeB can further restrict the creation of the radio bearer according to the backhaul link situation.

Step S811, after the bearer is created, the MME returns a PDN connection setup response/bearer creation response to the UE, where the bearer that has been successfully created is carried. If the bearer is not successfully created, the appropriate reason value is carried.

FIG. 9 is a schematic diagram of a base station notifying a MME of a backhaul link failure or limitation in a bearer setup procedure according to an embodiment of the present invention. Compared with FIG. 8, the main difference of FIG. 9 is that, in FIG. 8, the eNodeB notifies the MME of the backhaul link failure information using an independent message, and in FIG. 9, the eNodeB receives the radio bearer assignment (RAB assignment) of the MME. When the radio bearer is created for the terminal, the MME is notified of the backhaul link failure information in the RAB assignment response message.

As shown in FIG. 9, the following steps are included:

Step S901, the backhaul link between the eNodeB and the SGW is faulty, causing the S1-U connection to be disconnected, or the bandwidth is limited;

Step S902, the eNodeB detects that the backhaul link with the SGW is faulty;

Steps S903a/S903b, after which the MME receives a PDN connection request or a bearer creation request. The PDN connection request and the bearer creation request may be initiated by the UE side or initiated by the network side. According to the request, the MME will create a PDN connection for the UE or create a bearer of the specified bandwidth;

Step S904, the MME sends a bearer setup request to the SGW/PGW.

Step S905, the SGW/PGW establishes a corresponding bearer according to the request, and returns a bearer setup response.

Step S906, the MME sends a radio bearer assignment request to the eNodeB, and requests the eNodeB to establish a corresponding radio bearer according to the request.

Step S907: After receiving the radio bearer assignment request of the MME, the eNodeB determines whether to create the required bearer according to the backhaul link information.

Specifically, the eNodeB can perform the following judgment according to the backhaul link failure information between the eNodeB and the SGW:

If the backhaul link is disconnected, the creation of the corresponding radio bearer is rejected;

If the backhaul link is limited, it is determined whether to allow the radio bearer of the specified bandwidth to be created according to the limited condition;

Before making this determination, the eNodeB first determines that the terminal is located under the eNodeB and is assigned to the SGW.

Step S908, the eNodeB establishes a radio bearer according to the radio resource condition, and returns a radio bearer assignment response.

In this step, the eNodeB carries the backhaul link failure information, and the content is the same as step S803.

Step S909, if the MME requires that the radio bearer created by the eNodeB is not completely created, the MME needs to initiate a bearer change request to the SGW/PGW according to the radio bearer information returned by the eNodeB.

Step S910: The SGW/PGW modifies the bearer according to the bearer change request, and returns a bearer change response.

Step S911: After the bearer is created, the MME returns a PDN connection setup response/bearer creation response to the UE, where the bearer that has been successfully created is carried. If the bearer is not successfully created, the appropriate reason value is carried.

In the process, after the MME obtains the backhaul link failure information from the eNodeB and saves it locally, in the subsequent process of establishing a PDN connection and creating a bearer for other UEs, if the UE is under the eNodeB and the SGW, According to the backhaul link failure information, it is determined whether a corresponding bearer is created for the UE.

FIG. 10 is a schematic diagram of a SGW notifying a mobility management network element of a backhaul link failure or limitation in a bearer setup procedure according to an embodiment of the present invention. The flow shown in FIG. 10 is essentially the same as the flow shown in FIG. 9, except that the decision point and the notification point are placed on the SGW instead of the eNodeB. According to the flow shown in FIG. 10, when the MME requests the SGW to create a process for the terminal, the SGW notifies the MME of the backhaul link failure information in the bearer creation response.

As shown in FIG. 10, the following steps are included:

In step S1001, the backhaul link between the eNodeB and the SGW is faulty, causing the S1-U connection to be disconnected or the bandwidth is limited;

Steps S1002a/S1002b, the eNodeB and the SGW detect that the backhaul link between the eNodeB and the SGW is faulty;

Step S1003, after which the MME receives a PDN connection request or a bearer creation request. The PDN connection request and the bearer creation request may be initiated by the UE side or initiated by the network side. According to the request, the MME will create a PDN connection for the UE or create a bearer of the specified bandwidth;

Step S1004: The MME sends a bearer setup request to the SGW/PGW.

Step S1005: After receiving the bearer creation request of the MME, the SGW determines, according to the backhaul link information, whether to create the required bearer.

Specifically, the SGW may perform the following judgment according to the backhaul link failure information between the eNodeB and the SGW:

Before making this determination, the SGW first determines that the terminal is located under the eNodeB and is assigned to the SGW.

Step S1006: The SGW/PGW establishes a corresponding bearer according to the request, and returns a bearer setup response.

In this step, the SGW carries the backhaul link failure information, and the content is the same as step S603.

Step S1007: The MME sends a radio bearer assignment request to the eNodeB, and requests the eNodeB to establish a corresponding radio bearer according to the request.

Step S1008: After receiving the radio bearer assignment request of the MME, the eNodeB still makes a decision according to step S907.

Step S1009: The eNodeB establishes a radio bearer according to the radio resource condition, and returns a radio bearer assignment response.

Step S1010: After the bearer is created, the MME returns a PDN connection setup response/bearer creation response to the UE, where the bearer has been successfully created. If the bearer is not successfully created, the appropriate reason value is carried.

11 is a schematic diagram of a base station simultaneously notifying an MME to enter an isolated network mode according to an embodiment of the present invention. In the process, the eNodeB simultaneously notifies the mobility management network element that the eNodeB enters an isolated public safety network after the backhaul link fails or is restricted. (Isolated EUTRAN Public Safety, referred to as IOPS) mode. After entering the isolated public safety network mode (ie, IOPS mode), generally only UEs applied to public security are allowed to access the network, or public security UEs and UEs that initiate emergency services are allowed to access the network.

Compared with the flow shown in Figure 8, the flow shown in Figure 11 has the following main differences:

Step S1103, after the step S1102, after the eNodeB detects the backhaul link failure, the eNodeB may enter the IOPS mode according to the situation;

S1104: When the eNodeB notifies the MME of the backhaul link failure, the eNodeB carries the IOPS mode information to indicate whether the eNodeB enters the IOPS mode.

S1107: The MME comprehensively determines whether to permit the creation of the requested bearer according to the backhaul link failure information and the IOPS mode information.

In this step, if the MME determines that the base station enters the IOPS mode, if the UE is not a public safety UE, the MME may reject the PDN connection establishment and bearer creation request.

According to the flow of FIG. 11, the MME can obtain whether the eNodeB enters the IOPS mode, and then the MME can use the backhaul link information and the IOPS mode information to comprehensively determine whether to create a bearer for the terminal. When the network initiates bearer establishment), whether to allow handover, and so on.

FIG. 12 is a schematic diagram of an MME interpreting whether to allow a UE to handover from a source base station to a target base station according to backhaul link failure information and IOPS mode information of a base station according to an embodiment of the present invention.

In the step shown in FIG. 12, it is assumed that the UE initially accesses the eNodeB1, the eNodeB1 backhaul link is normal, and the eNodeB2 backhaul link has a problem.

As shown in Figure 12, the following steps are included:

S1201: The eNodeB detects a fault of the backhaul link.

S1202: The eNodeB reports backhaul link fault information to the MME.

In this embodiment, the eNodeB2 reports the backhaul link failure information to the MME, and whether the IOPS mode is enabled or not. The method shown in the foregoing embodiments of Figures 6-9 can be used.

S1203: The UE moves in a location, and the UE detects the eNodeB2 and the corresponding cell.

S1204: The UE initiates a handover request to the eNodeB1.

S1205: The eNodeB1 forwards the handover request to the MME.

S1206, the MME determines, according to the backhaul link failure information and the IOPS mode information of the target base station, whether to allow the UE to switch from the source base station to the target base station, where the source base station is the eNodeB1 and the target base station is the eNodeB2;

The MME will determine whether to allow handover based on the following methods:

If the backhaul link between the target base station and the target SGW is normal, check other handover restrictions, and if there is no other handover restriction, allow handover;

If the backhaul link between the target base station and the target SGW is faulty and the user plane link is disconnected, the handover is not allowed;

If the backhaul link between the target base station and the target SGW is faulty, and the user plane link is limited, it is determined according to the limited situation, which bearers can be switched over, and if there is no switchable bearer, the handover is not allowed;

If the target base station enables the IOPS mode, only the public safety user is allowed to switch to the target base station according to the policy;

S1207: The MME returns a handover response to the eNodeB1.

S1208. Perform a handover preparation process between the source base station eNodeB1 and the target base station eNodeB2.

S1209, performing the following process steps of the handover according to the prior art;

As shown in the flowchart of FIG. 8-12, after the MME obtains the backhaul link fault information and the IOPS mode information of the base station, the MME stores the information locally, and can use the information as a basis for determining whether to create a bearer for the UE. Similarly, the foregoing information may also be used by the MME to determine whether to allow the UE to be handed over to the target eNodeB and the SGW. If the backhaul link between the target eNodeB and the SGW is disconnected, the MME should theoretically not switch the UE to the current eNodeB and the target SGW. If the backhaul link between the target eNodeB and the SGW is limited, the MME should determine which bearers can be handed over to the target eNodeB, SGW.

In summary, the method for processing a backhaul link fault proposed by the present invention enables the mobility management network element MME to detect a backhaul link failure between the base station eNodeB and the core network, thereby subsequently following the backhaul link condition. , decide whether to allow the creation of the corresponding bearer. Whether to allow switching to the target base station, etc.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be used with general calculations. The devices are implemented, they may be centralized on a single computing device, or distributed over a network of multiple computing devices, optionally they may be implemented in program code executable by the computing device, such that they may be stored Executed by the computing device in a storage device, and in some cases, the steps shown or described may be performed in an order different than that herein, or separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

A bearer creation processing method includes:

The mobility management unit MME acquires backhaul link fault information between the base station and the core network device.

Receiving, by the MME, request information for creating a bearer for the terminal;

The MME determines whether to allow the bearer to be created according to the backhaul link failure information.
The method of claim 1, wherein the backhaul link failure information comprises at least one of the following:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The method according to claim 2, wherein the determining, by the MME, whether to allow the creation of the bearer according to the backhaul link failure information comprises:

When the backhaul link failure information is the first information, the MME prohibits the creation of the bearer; or

When the backhaul link failure information is the second information, the MME creates a bearer corresponding to the specified bandwidth requirement corresponding to the second information according to the information that the user plane link bandwidth is limited.
The method according to claim 1, wherein the manner in which the mobility management unit MME acquires backhaul link failure information between the base station and the core network device comprises at least one of the following:

Acquiring the backhaul link fault information from the notification message sent by the base station, where the notification message is an overload start message or other S1 interface message;

Obtaining the backhaul link failure information from a radio bearer assignment response message sent by the base station;

Obtaining the backhaul link fault information from the bearer creation response message sent by the core network device, where the bearer creation response message is a response message of a bearer creation request sent by the MME.
The method of claim 1, wherein the determining, by the MME, whether to allow the bearer to be created according to the backhaul link failure information further comprises:

Receiving, by the MME, indication information indicating whether the base station enters an isolated public safety network mode;

Determining, by the MME, whether to create the bearer according to the backhaul link failure information and the indication information.
The method of any of claims 1 to 5, wherein the core network device is a serving gateway.
A bearer creation processing method includes:

The base station sends the backhaul link failure information between the base station and the core network device to the mobility management unit MME;

The backhaul link fault information is used by the MME to determine whether to allow a bearer to be created for the terminal.
The method of claim 7, wherein the backhaul link failure information comprises at least one of the following:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The method of claim 7, wherein the transmitting, by the base station, the backhaul link failure information between the base station and the core network device to the mobility management unit MME further comprises:

The base station sends, to the MME, indication information for indicating whether the base station enters an isolated public safety network mode, where the backhaul link failure information and the indication information determine, by the MME, whether to allow a terminal to be created for the terminal. Basis.
The method according to any of claims 7 to 9, wherein the core network device is a serving gateway.
A bearer creation processing device is applied to the mobility management unit MME, and the device includes:

Obtaining a module, configured to acquire backhaul link fault information between the base station and the core network device;

a receiving module, configured to receive request information for creating a bearer for the terminal;

A determining module is configured to determine whether to permit creation of the bearer based on the backhaul link failure information.
The apparatus of claim 11, wherein the backhaul link failure information comprises at least one of the following:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The apparatus according to claim 12, wherein said determining module is further configured to prohibit creation of said bearer when said backhaul link failure information is said first information; or said backhaul link failure information When the second information is used, the bearer corresponding to the specified bandwidth requirement corresponding to the second information is created according to the information that the user plane link bandwidth is limited.
The apparatus according to claim 11, wherein the obtaining module is further configured to:

Acquiring the backhaul link fault information from the notification message sent by the base station, where the notification message is an overload start message or other S1 interface message; or

Obtaining the backhaul link failure information from a radio bearer assignment response message sent by the base station; or

Obtaining the backhaul link fault information from the bearer creation response message sent by the core network device, where the bearer creation response message is a response message of a bearer creation request sent by the MME.
The apparatus of claim 11, wherein the obtaining module is further configured to receive indication information indicating whether the base station enters an isolated public safety network mode; the determining module is further configured to fail according to the backhaul link The information and the indication information determine whether the creation of the bearer is allowed.
Apparatus according to any one of claims 11 to 15, wherein the core network device is a serving gateway.
A bearer creation processing device is applied to a base station, and the device includes:

a sending module, configured to send backhaul link fault information between the base station and the core network device to the mobility management unit MME;

The backhaul link fault information is used by the MME to determine whether to allow a bearer to be created for the terminal.
The apparatus of claim 17, wherein the backhaul link failure information comprises at least one of the following:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The apparatus according to claim 17, wherein the transmitting module is further configured to send, to the MME, indication information indicating whether the base station enters an isolated public safety network mode; wherein the backhaul link failure information and The indication information is a basis for the MME to determine whether to allow a bearer to be created for the terminal.
The apparatus of any one of claims 17 to 19, wherein the core network device is a serving gateway.
A method for processing a base station handover, comprising:

The mobility management unit MME acquires backhaul link fault information between the base station and the core network device.

Receiving, by the MME, a handover request that the terminal is handed over by the source base station to the target base station;

Determining, by the MME, whether the terminal is allowed to switch to the target base station according to the backhaul link failure information of the target base station.
The method of claim 21, wherein the backhaul link failure information comprises at least one of the following:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The method according to claim 22, wherein the determining, by the MME, whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station comprises:

When the backhaul link failure information of the target base station is the first information, the MME prohibits the terminal from switching to the target base station; or

When the backhaul link fault information of the target base station is the second information, the MME, according to the information that the user plane link bandwidth is limited, carries the bearer corresponding to the specified bandwidth requirement corresponding to the second information. Switching to the target base station.
The method according to claim 21, wherein the determining, by the MME, whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station further comprises:

Receiving, by the MME, indication information used to indicate whether the target base station enters an isolated public safety network mode;

Determining, by the MME, whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station and the indication information.
The method of any of claims 21 to 24, wherein the core network device is a serving gateway.
A base station handover processing apparatus is applied to a mobility management unit MME, and the apparatus includes:

Obtaining a module, configured to acquire backhaul link fault information between the base station and the core network device;

a receiving module, configured to receive a handover request of the terminal to be switched by the source base station to the target base station;

And a determining module, configured to determine whether to allow the terminal to switch to the target base station according to the backhaul link failure information of the target base station.
The apparatus of claim 26, wherein the backhaul link failure information comprises at least one of:

The first information used to indicate that the user plane link is disconnected, and the second information used to indicate that the user plane link bandwidth is limited.
The apparatus according to claim 27, wherein the determining module is further configured to prohibit the terminal from switching to the target base station when the backhaul link failure information of the target base station is the first information; or When the backhaul link fault information of the target base station is the second information, according to the information that the user plane link bandwidth is limited, the bearer corresponding to the specified bandwidth requirement corresponding to the second information is switched to the The target base station.
The apparatus of claim 26, wherein the obtaining module is further configured to receive indication information indicating whether the target base station enters an isolated public safety network mode; the determining module is based on a backhaul link of the target base station The failure information and the indication information determine whether the terminal is allowed to switch to the target base station.
The apparatus of any one of claims 26 to 29, wherein the core network device is a serving gateway.