CN102958197B - Method for establishing X2 service signaling connection, base station and CSG (cell site gateway) - Google Patents

Abstract

The embodiment of the present invention discloses a method for establishing a signaling connection of an X2 service, a base station, and a cellular node gateway. The method includes: the local base station sends a first request message to the local cellular node gateway connected to the local base station, and the second A request message includes the IP address of the local base station, the IP address of the peer base station to perform X2 service communication with the local base station, and the identifier requesting to establish the X2 service routing channel; the local base station receives the first request from the local CSG. A confirmation message is used to establish a signaling connection for the X2 service with the peer base station, wherein the first confirmation message is a message sent after the X2 service routing channel between the local CSG and the peer CSG is established. Through the above method, the embodiment of the present invention enables the equipment in the LTE bearer network to configure the X2 service routing channel for the base station in real time as required, reducing the cost of configuring the X2 service channel and improving the stability of the cellular node gateway.

Description

Method for establishing X2 service signaling connection, base station, and cellular node gateway

technical field

The invention relates to the technical field of wireless communication, in particular to a method for establishing an X2 service signaling connection, a base station, and a cellular node gateway.

Background technique

Currently, the development of smart phones requires the support of the bearer network. Similarly, higher requirements are placed on the bearer network. In order to better support the current mobile Internet applications, all operators have basically begun to establish 3G (3rd Generation, third generation) networks. At the same time, many operators in North America, Japan, South Korea, and Europe have begun to establish LTE (Long Term Evolution, Long Term Evolution) network, while using IP (Internet Protocol, Internet Protocol) network to carry wireless services.

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a schematic structural diagram of an LTE bearer network in the prior art, and FIG. 2 is a schematic diagram of an S1 interface and an X2 interface in the LTE bearer network shown in FIG. 1 . Among them, the S1 interface is the service interface between the base station and the mobility management entity. All service data between the base station and the mobility management entity are transmitted through the S1 interface, and the service data between the base stations are transmitted through the X2 interface. Among them, the services between base stations can be collectively referred to as X2 services, and the X2 services have the following characteristics:

1. In order to transmit X2 services between base stations, a full connection needs to be established.

2. In order to save more bandwidth of the LTE bearer network, it is best to forward the X2 service at the nearest network layer.

3. The scope of the X2 service cannot be determined in advance, and each base station cannot know in advance which other base stations need to establish X2 service connections.

Based on the characteristics of the X2 service above, in the prior art, it is necessary to pre-plan which base stations may use the X2 service, and manually configure the LTE bearer network-related equipment (for example: CSG (CellSite Gateway, cellular node gateway)) connected to the base station To establish an X2 service routing channel. However, the above method has two disadvantages:

1. When there are many X2 services, each X2 service needs to configure related equipment in the LTE bearer network connected to the base station, which is too high in labor costs and increases the burden on related equipment in the LTE bearer network.

2. Due to manual configuration, the range of X2 services needs to be known in advance, but some X2 services cannot be known in advance. As a result, these X2 services cannot normally establish X2 service signaling connections because the X2 service routing channel is not pre-configured.

Contents of the invention

Embodiments of the present invention provide a method for establishing an X2 service signaling connection, a base station, and a cellular node gateway, which enable the LTE bearer network to establish an X2 service routing channel in real time as required, thereby improving the success rate of establishing an X2 service signaling connection between base stations , reducing the workload of manual planning and establishing X2 service routing channels, and improving the stability of the cellular node gateway.

In the first aspect, a method for establishing an X2 service signaling connection is provided, and the method includes:

The local base station sends a first request message to the local CSG connected to the local base station, and the first request message includes the IP address of the local base station and the IP address of the local base station to perform X2 service communication with the local base station. The IP address of the peer base station and the identification requesting to establish the X2 service routing channel;

After the local base station receives the first confirmation message sent by the local CSG, it establishes a signaling connection with the X2 service between the opposite base station, wherein the first confirmation message is The message sent after the X2 service routing channel between the local CSG and the peer CSG is established, the peer CSG is the CSG connected to the peer base station, and the local CSG is configured according to the IP address of the local base station The address and the IP address of the peer base station configure the X2 service routing information of the local CSG, and publish the X2 service routing information of the local CSG, and the local CSG receives the X2 service routing information of the peer CSG, thereby Establishing an X2 service routing channel between the local CSG and the peer CSG, wherein,

The local CSG configures the X2 service routing information of the local CSG, and publishes the X2 service routing information of the local CSG, including:

The local CSG sets the imported routing target RT parameter and the exported RT parameter of the first virtual private network forwarding instance VRF as the first parameter and the second parameter respectively, and publishes the virtual private network VPN routing information of the first VRF, Wherein, the first VRF is a VRF corresponding to the X2 service on the local CSG, the first parameter is converted from the IP address of the local base station according to a first conversion rule, and the second parameter is obtained from the The IP address of the peer base station is converted according to the second conversion rule;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG receives the VPN routing information of the second VRF sent by the peer CSG, the second VRF is the VRF corresponding to the X2 service on the peer CSG, and the VPN routing information of the second VRF The imported RT parameters in the information are converted from the IP address of the peer base station according to the second conversion rule, and the derived RT parameters in the VPN routing information of the second VRF are converted from the IP address of the local base station according to the converted by the above first conversion rule; or

The local CSG configures the X2 service routing information of the local CSG, and publishing the X2 service routing information of the local CSG includes:

The local CSG sets the derived RT parameter of the first VRF and the community attribute in the border gateway protocol label BGPLabel routing update message as the third parameter, wherein the first VRF corresponds to the X2 service on the local CSG VRF, the third parameter is obtained by exchanging the IP address of the local base station;

The local CSG sends the VPN routing information of the first VRF and the BGP Label routing update message to the border gateway protocol BGP neighbor device connected to the local CSG;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG sends a virtual private network routing egress filtering request VPN ORF message and a Border Gateway Protocol egress routing filtering request BPG ORF message to the BGP neighbor device, wherein the imported RT parameter in the VPN ORF message is set to The fourth parameter, the community attribute in the BPG ORF message is set to the fourth parameter, and the fourth parameter is obtained by converting the IP address of the opposite base station;

The local CSG receives the VPN routing information and the BGP Label routing information sent by the BGP neighbor device, wherein the VPN routing information and the BGP Label routing information are respectively the BGP neighbor device parsing the received After the VPN ORF message and the BGPORF message, the fourth parameter is obtained, and the VPN routing information and the BGP Label routing information sent after the fourth parameter and its local routing information are successfully matched.

In the first possible implementation manner of the first aspect, before the local base station sends the first request message to the CSG connected to the local base station, the method further includes:

The local base station receives the establishing X2 service communication message sent by the mobility management entity; the local base station analyzes the establishing X2 service communication message, and obtains the IP address of the opposite base station.

With reference to the first aspect, or the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the first request message is an Extended Dynamic Host Configuration Protocol DHCP A request message, the first confirmation message is an extended DHCP confirmation message.

In the second aspect, a method for establishing an X2 service signaling connection is provided, and the method includes:

The local CSG receives a first request message sent from the local base station connected to the local CSG, wherein the first request message includes the IP address of the local base station and is to be communicated with the local base station The IP address of the base station at the opposite end of the X2 service communication and the identification requesting to establish the X2 service routing channel;

The local CSG parses the first request message, and obtains the IP address of the local base station and the IP address of the opposite base station;

The local CSG configures the X2 service routing information of the local CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the local CSG, and the local The end CSG receives the X2 service routing information of the opposite end CSG, thereby establishing an X2 service routing channel between the local end CSG and the opposite end CSG, wherein the opposite end CSG is a CSG connected to the opposite end base station;

After the local CSG establishes the X2 service routing channel between the local CSG and the peer CSG, it sends a first confirmation message to the local base station, so that the local base station establishes a connection with the The signaling connection of the X2 service between peer base stations. .

In the first possible implementation manner of the second aspect,

The local CSG configures the X2 service routing information of the local CSG, and publishes the X2 service routing information of the local CSG, including:

The local CSG sets the import RT (Route Target, routing target) parameter and the export RT parameter of the first VRF (Virtual Private Network Routing&Forwarding Instance, virtual private network forwarding instance) as the first parameter and the second parameter respectively, and publishes The VPN (Virtual Private Network) routing information of the first VRF, wherein the first VRF is the VRF corresponding to the X2 service on the local CSG, and the first parameter is determined according to the IP address of the local base station converted by the first conversion rule, and the second parameter is converted by the IP address of the peer base station according to the second conversion rule;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG receives the VPN routing information of the second VRF sent by the peer CSG, the second VRF is the VRF corresponding to the X2 service on the peer CSG, and the VPN routing information of the second VRF The imported RT parameters in the information are converted from the IP address of the peer base station according to the second conversion rule, and the derived RT parameters in the VPN routing information of the second VRF are converted from the IP address of the local base station according to the converted by the above first conversion rule.

In a second possible implementation manner of the second aspect, the local CSG configures the X2 service routing information of the local CSG, and publishing the X2 service routing information of the local CSG includes:

The local CSG sets the derived RT parameter of the first VRF and the community attribute in the BGP Label (BorderGateway Protocol Label, border gateway protocol label) routing update message as the third parameter, wherein the first VRF is the local The VRF corresponding to the X2 service on the CSG, the third parameter is obtained by converting the IP address of the local base station;

The local CSG sends the VPN routing information of the first VRF and the BGP Label routing update message to a Border Gateway Protocol (BGP) neighbor device connected to the local CSG;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG sends a VPN ORF (Virtual PrivateNetwork Outbound Route Filter, Virtual Private Network Outbound Route Filtering Request) message and a BPG ORF (Border Gateway Protocol Outbound Route Filter, Border Gateway Protocol Outbound Route Filtering Request) to the BGP neighbor device message, wherein the imported RT parameter in the VPN ORF message is set as the fourth parameter, the community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is set by the opposite base station The IP address conversion is obtained;

The local CSG receives the VPN routing information and the BGP Label routing information sent by the BGP neighbor device, wherein the VPN routing information and the BGP Label routing information are respectively the BGP neighbor device parsing the received After the VPN ORF message and the BGPORF message, the fourth parameter is obtained, and the VPN routing information and the BGP Label routing information sent after the fourth parameter and its local routing information are successfully matched.

In a third aspect, a base station is provided, and the base station includes:

A sending module, configured to send a first request message to the local CSG connected to the base station, where the first request message includes the IP address of the base station and the address of the opposite base station to perform X2 service communication with the base station IP address and the identification of the request to establish the X2 service routing channel;

The service opening module is configured to establish a signaling connection with the X2 service between the peer base station after receiving the first confirmation message sent by the local CSG, wherein the first confirmation message is A message sent after the X2 service routing channel between the local CSG and the peer CSG is established, the peer CSG is the CSG connected to the peer base station, and the local CSG is based on the IP address of the base station Configure the X2 service routing information of the local CSG with the IP address of the peer base station, and publish the X2 service routing information of the local CSG, and the local CSG receives the X2 service routing information of the peer CSG, thereby establishing The X2 service routing channel between the local CSG and the peer CSG, wherein,

The local CSG configures the X2 service routing information of the local CSG, and publishes the X2 service routing information of the local CSG, including:

The local CSG sets the imported routing target RT parameter and the exported RT parameter of the first virtual private network forwarding instance VRF as the first parameter and the second parameter respectively, and publishes the virtual private network VPN routing information of the first VRF, Wherein, the first VRF is a VRF corresponding to the X2 service on the local CSG, the first parameter is obtained by converting the IP address of the base station according to a first conversion rule, and the second parameter is obtained by the opposite end The IP address of the base station is converted according to the second conversion rule;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG receives the VPN routing information of the second VRF sent by the peer CSG, the second VRF is the VRF corresponding to the X2 service on the peer CSG, and the VPN routing information of the second VRF The imported RT parameters in the information are converted from the IP address of the peer base station according to the second conversion rule, and the derived RT parameters in the VPN routing information of the second VRF are converted from the IP address of the base station according to the second conversion rule. A transformation rule transforms to obtain; or

The local CSG configures the X2 service routing information of the local CSG, and publishing the X2 service routing information of the local CSG includes:

The local CSG sets the derived RT parameter of the first VRF and the community attribute in the border gateway protocol label BGPLabel routing update message as the third parameter, wherein the first VRF corresponds to the X2 service on the local CSG VRF, the third parameter is obtained by exchanging the IP address of the base station;

The local CSG sends the VPN routing information of the first VRF and the BGP Label routing update message to the border gateway protocol BGP neighbor device connected to the local CSG;

The local CSG receives the X2 service routing information of the peer CSG, including:

The local CSG sends a virtual private network routing egress filtering request VPN ORF message and a Border Gateway Protocol egress routing filtering request BPG ORF message to the BGP neighbor device, wherein the imported RT parameter in the VPN ORF message is set to The fourth parameter, the community attribute in the BPG ORF message is set to the fourth parameter, and the fourth parameter is obtained by converting the IP address of the opposite base station;

The local CSG receives the VPN routing information and the BGP Label routing information sent by the BGP neighbor device, wherein the VPN routing information and the BGP Label routing information are respectively the BGP neighbor device parsing the received After the VPN ORF message and the BGPORF message, the fourth parameter is obtained, and the VPN routing information and the BGP Label routing information sent after the fourth parameter and its local routing information are successfully matched.

In a first possible implementation manner of the third aspect, the base station further includes:

A receiving module, configured to receive an establishment X2 service communication message sent from a mobility management entity;

A parsing module, configured to parse the message for establishing X2 service communication, and obtain the IP address of the peer base station.

With reference to the third aspect, or the first possible implementation of the third aspect, in the second possible implementation of the third aspect, the first request message is an extended DHCP request message, The first confirmation message is an extended DHCP confirmation message.

In a fourth aspect, a CSG is provided, including:

A receiving module, configured to receive a first request message sent from a base station connected to the CSG, where the first request message includes the IP address of the base station, and the IP address of the base station to perform X2 service communication with the base station The IP address of the peer base station and the identification requesting to establish the X2 service routing channel;

A parsing module, configured to parse the first request message to obtain the IP address of the base station and the IP address of the opposite base station;

A configuration module, configured to configure X2 service routing information according to the IP address of the base station and the IP address of the peer base station, publish the X2 service routing information, and receive the X2 service routing information of the peer CSG, thereby establishing and an X2 service routing channel between the peer CSG, wherein the peer CSG is a CSG connected to the peer base station;

A sending module, configured to send a first confirmation message to the base station after establishing an X2 service routing channel with the peer CSG, so that the base station establishes an X2 service communication with the peer base station order to connect.

In the first possible implementation manner of the fourth aspect, the configuration module is specifically configured to set the imported RT parameter and the exported RT parameter of the first VRF as the first parameter and the second parameter respectively, and publish the VPN routing information of the first VRF, wherein the first VRF is a VRF corresponding to the X2 service on the CSG, and the first parameter is obtained by converting the IP address of the local base station according to a first conversion rule, The second parameter is obtained by converting the IP address of the peer base station according to a second conversion rule; receiving the VPN routing information of the second VRF sent by the peer CSG, and the second VRF is the peer CSG on the VRF corresponding to the X2 service, the imported RT parameter in the VPN routing information of the second VRF is converted from the IP address of the peer base station according to the second conversion rule, and the VPN route of the second VRF The derived RT parameter in the information is converted from the IP address of the local base station according to the first conversion rule.

In the second possible implementation of the fourth aspect, the configuration module is specifically configured to set the derived RT parameter of the first VRF and the community attribute in the BGP Label routing update message as the third parameter, wherein, The first VRF is the VRF corresponding to the X2 service on the CSG, and the third parameter is obtained by converting the IP address of the local base station; the CSG sends the BGP neighbor device connected to the CSG the VPN routing information of the first VRF and the BGP Label routing update message; the CSG sends a VPN ORF message and a BPG ORF message to the BGP neighbor device, wherein the import RT parameter setting in the VPN ORF message is the fourth parameter, the community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is obtained by converting the IP address of the peer base station; the CSG receives the BGP neighbor device Sending VPN routing information and BGP Label routing information, wherein, the VPN routing information and the BGP Label routing information are obtained after the BGP neighbor device parses the received VPN ORF message and the BGP ORF message respectively The fourth parameter, and the VPN routing information and BGP Label routing information sent after the fourth parameter is successfully matched with its local routing information.

The method for establishing an X2 service signaling connection provided by the embodiment of the present invention, the base station, and the CSG send a first request message to the CSG connected to the local base station through the local base station, and the first request message carries the local base station and the peer The IP address of the end base station, and the identification of the request to establish the X2 service routing channel. After receiving the first request message, the CSG automatically establishes the local CSG and connects to the opposite end base station according to the IP addresses of the local end base station and the opposite end base station. The X2 service routing channel between the peer CSGs, and sends the first confirmation message to the local base station. After receiving the first confirmation message, the local base station establishes a signaling connection with the X2 service between the peer base station. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

Description of drawings

FIG. 1 is a schematic diagram of networking of an LTE bearer network in the prior art;

Fig. 2 is a schematic diagram of the X2 interface and the S1 interface in the LTE bearer network shown in Fig. 1;

FIG. 3 is a schematic flowchart of a first embodiment of a method for establishing an X2 service signaling connection according to the present invention;

FIG. 4 is a schematic flowchart of a second embodiment of a method for establishing an X2 service signaling connection according to the present invention;

FIG. 5 is a schematic flowchart of a third embodiment of a method for establishing an X2 service signaling connection according to the present invention;

FIG. 6 is a schematic flowchart of a fourth embodiment of a method for establishing an X2 service signaling connection according to the present invention;

FIG. 7 is a schematic diagram of networking of an LTE bearer network in a second embodiment of the present invention;

FIG. 8 is a schematic flowchart of a fifth embodiment of a method for establishing an X2 service signaling connection according to the present invention;

FIG. 9 is a schematic structural diagram of a first embodiment of a base station according to the present invention;

FIG. 10 is a schematic structural diagram of a second embodiment of a base station according to the present invention;

Fig. 11 is a schematic structural diagram of the first embodiment of the cellular node gateway of the present invention;

Fig. 12 is a schematic structural diagram of the second embodiment of the cellular node gateway of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 3 . FIG. 3 is a schematic flowchart of a first embodiment of a method for establishing an X2 service signaling connection according to the present invention. As shown in Figure 3, the method includes:

101. The local base station sends a first request message to the local CSG connected to the local base station. The first request message includes the IP address of the local base station and the IP address of the peer base station to perform X2 service communication with the local base station And an identifier for requesting to establish an X2 service routing channel.

The device type of the CSG may be a router, which is used to connect the base station and the LTE bearer network.

The first request message is used for the base station at the local end to request the CSG at the local end to establish an X2 service routing channel with the CSG at the opposite end. In the implementation manner of the present invention, the first request message may be an extended DHCP request message. One of the extended DHCP request message formats is as follows:

Wherein, Htype=3, is the mark of DHCP request message, and Options (variable) field adopts newly defined format, and other fields are DHCP standard fields, remain unchanged, and the newly defined format of Options (variable) field is as shown in table 1:

Table 1 is the format of Options (variable) in the extended DHCP message

Code Len SubCode1 SubLen1 IPAddr1 SubCode2 SubLen2 IPAddr2

Code newly defines a value to indicate a new option option, and the newly defined value is used to indicate that the extended DHCP message is a DHCP message for requesting establishment of an X2 service routing channel.

Len represents the length from Code to IPAddr2.

SubCode1=1 indicates that the following is the IP address of the local base station.

SubLen1 represents the length of the IP address of the local base station.

IPAddr1 represents the IP address of the local base station.

SubCode2=2 indicates that the IP address of the peer base station follows.

SubLen2 represents the length of the IP address of the peer base station.

IPAddr2 represents the IP address of the peer base station.

Of course, the first request message can also be in other forms, such as a custom IP message, the content of which includes the IP address of the local base station, and the peer base station to perform X2 service communication with the local base station The IP address of the user and the identifier requesting to establish the X2 service routing channel are sufficient.

102. After receiving the first confirmation message sent by the local CSG, the local base station establishes a signaling connection with the X2 service between the remote base station, wherein the first confirmation message is between the local CSG and the remote CSG The message sent after the X2 service routing channel between them is established, and the peer CSG is the CSG connected to the peer base station.

The first confirmation message is used to indicate that the X2 service routing channel between the local CSG and the peer CSG has been established, and the local base station can establish an X2 service signaling connection with the peer base station. In the embodiment of the present invention, if the first request message is an extended DHCP request message, the first confirmation message may also be an extended DHCP confirmation message, and the extended DHCP confirmation message includes the X2 service route that has been successfully established. The ID of the channel.

In the embodiment of the present invention, the local base station sends the first request message to the CSG connected to the local base station, and the local base station receives the first request message sent by the local CSG after completing the establishment of the X2 service routing channel according to the first request message. After confirming the message, an X2 service signaling connection with the peer base station is established. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

See Figure 4. Fig. 4 is a schematic flowchart of a second embodiment of the method for establishing an X2 service signaling connection according to the present invention. As shown in Figure 4, the method includes:

201. The local base station receives an establishment X2 service communication message sent from an MME (Mobility Management Protocol, mobile management entity);

The MME is mainly responsible for mobility management and session management. It can perceive the base stations that need to communicate with X2 services. The MME encapsulates the IP addresses of the two base stations that need to communicate with X2 services in the X2 The base station sends a message for establishing X2 service communication.

202. The local base station parses the establishing X2 service communication message, and obtains the IP address of the opposite base station to establish the X2 service communication with the local base station.

203. The local base station sends a first request message to the local CSG connected to the local base station, where the first request message includes the IP address of the local base station, the IP address of the remote base station, and the request to establish the X2 service routing channel logo;

The first request message may be an extended DHCP request message, wherein the format of the extended DHCP request message may be the same as the format of the extended DHCP request message in the first embodiment of the method for establishing an X2 service signaling connection in the present invention .

204. After receiving the first confirmation message sent by the local CSG, the local base station establishes a signaling connection with the X2 service between the remote base station, wherein the first confirmation message is between the local CSG and the remote CSG The message sent after the X2 service routing channel between them is established, and the peer CSG is the CSG connected to the peer base station.

In the embodiment of the present invention, if the first request message is an extended DHCP request message, the first confirmation message may be an extended DHCP confirmation message, and the extended DHCP confirmation message includes the X2 service routing channel that has been successfully established. so that the base station can confirm that the X2 service routing channel has been established when receiving the extended DHCP confirmation message.

For how to establish an X2 service routing channel between the local CSG and the peer CSG, please refer to the third, fourth and fifth implementations of the method for establishing an X2 service signaling connection in the present invention, which will not be repeated here repeat.

In the embodiment of the present invention, the local base station sends the first request message to the CSG connected to the local base station, and the local base station receives the first request message sent by the local CSG after completing the establishment of the X2 service routing channel according to the first request message. After confirming the message, an X2 service signaling connection with the peer base station is established. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a third embodiment of a method for establishing an X2 service signaling connection according to the present invention. As shown in Figure 5, the method includes:

301. The local CSG receives a first request message sent from the local base station connected to the local CSG, where the first request message includes the IP address of the local base station and the IP address of the local base station to establish X2 service communication with the local base station. The IP address of the peer base station and the identifier requesting to establish the X2 service routing channel.

The device type of the CSG may be a router, which is used to connect the base station and the LTE bearer network.

In the embodiment of the present invention, the first request message may be an extended DHCP request message, and its message format may be the same as that of the extended DHCP request message in the first embodiment of the method for establishing an X2 service signaling connection in the present invention. The format is the same and will not be repeated here.

302. The local CSG parses the first request message, and obtains the IP address of the local base station and the IP address of the remote base station.

303. The local CSG configures the X2 service routing information of the local CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the local CSG, and the local CSG receives the X2 service routing information of the peer CSG. Service routing information, so as to establish an X2 service routing channel between the local CSG and the peer CSG, where the peer CSG is a CSG connected to the peer base station.

The local CSG publishes the X2 service routing information of the local CSG, so that the peer CSG learns the route to the local base station; the local CSG receives the X2 service routing information of the peer CSG, so that the local CSG obtains the route to the peer base station, thereby Establish an X2 service routing channel between the local CSG and the remote CSG.

304. After establishing the X2 service routing channel between the local CSG and the remote CSG, the local CSG sends a first confirmation message to the local base station, so that the local base station establishes X2 service signaling with the remote base station connect.

After receiving the first confirmation message, the local base station determines that the X2 service routing channel between the local CSG and the peer CSG has been established, and the local base station can establish an X2 service signaling connection with the peer base station.

In the embodiment of the present invention, the local CSG receives the first request message sent from the local base station connected to the local CSG, and obtains the local base station IP address and the peer base station IP address from the first request message , further, the local CSG configures the X2 service routing information of the local CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the local CSG, and the local CSG receives the peer The X2 service routing information of the CSG, so as to establish the X2 service routing channel, and send the first confirmation message to the local base station, so that the local base station establishes a signaling connection for the X2 service with the remote base station. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

Please refer to FIG. 6 . FIG. 6 is a schematic flowchart of a fourth embodiment of a method for establishing an X2 service signaling connection according to the present invention. For ease of understanding, please also refer to FIG. 7 , which is a schematic diagram of a LTE bearer network. Wherein, both POC1 and POC3 in FIG. 7 are BGP neighbor devices. The methods include:

311. The local CSG receives a first request message sent from the local base station connected to the local CSG, where the first request message includes the IP address of the local base station and the IP address of the local base station to establish X2 service communication with the local base station. The IP address of the peer base station and the identifier requesting to establish the X2 service routing channel.

The device type of the CSG may be a router, which is used to connect the base station and the LTE bearer network.

In the embodiment of the present invention, the first request message may be an extended DHCP request message, and its message format may be the same as that of the extended DHCP request message in the first embodiment of the method for establishing an X2 service signaling connection in the present invention. The format is the same and will not be repeated here.

312. The local CSG parses the first request message, and obtains the IP address of the local base station and the IP address of the remote base station.

313: The local CSG sets the imported RT parameters and exported RT parameters of the first VRF as the first parameter and the second parameter respectively, and publishes the VPN routing information of the first VRF, wherein the first VRF is the connection between the local CSG and X2 For the VRF corresponding to the service, the first parameter is converted from the IP address of the local base station according to the first conversion rule, and the second parameter is converted from the IP address of the remote base station according to the second conversion rule.

It should be noted that if there is a first VRF corresponding to the X2 service in the local CSG, the first VRF can be used directly; if there is no first VRF corresponding to the X2 service in the local CSG, the first VRF corresponding to the X2 service a VRF. The first conversion rule and the second conversion rule may be the same or different. Further, before releasing the first VRF, add routing information from the local CSG to the local base station to the first VRF, so that the X2 service message from the remote base station can be routed according to the above routing information after reaching the local CSG. , forwarded to the local base station.

The local CSG advertises the VPN routing information of the first VRF to the local POC3.

314. The local CSG receives the VPN routing information of the second VRF sent by the peer CSG. The second VRF is the VRF corresponding to the X2 service on the peer CSG. The imported RT parameters in the VPN routing information of the second VRF are determined by the peer The IP address of the end base station is converted according to the second conversion rule, and the derived RT parameter in the VPN routing information of the second VRF is converted from the IP address of the local base station according to the first conversion rule.

For example, the first conversion rule in the above 313 and 314 may be "base station address IP:1", and the second conversion rule may also be "base station address IP:1". For example, if the IP address of the local base station is 1.1.1.1 and the IP address of the remote base station is 2.2.2.2, the imported RT in the X2 service VPN routing information published by the local CSG is 1.1.1.1:1, and the exported RT is 2.2.2.2 :1, the imported RT in the X2 service VPN routing information released by the remote CSG is 2.2.2.2:1, and the exported RT is 1.1.1.1:1, so the imported RT in the X2 service VPN routing information released by the local CSG The exported RT in the X2 service VPN routing information published by the remote CSG is the same as the exported RT in the X2 service VPN routing information published by the local CSG and the imported RT in the X2 service VPN routing information published by the remote CSG. The end CSG learns the route to the local base station and the local CSG obtains the route to the opposite end base station, so as to establish the X2 service routing channel between the local CSG and the opposite end CSG.

Further, before issuing the second VRF, the peer CSG adds routing information from the peer CSG to the peer base station in the second VRF, so that the X2 service message from the local base station can be sent to the peer CSG according to The routing information mentioned above is forwarded to the peer base station.

Referring to FIG. 7 , before the above 313 and 314 , the nodes related to the LTE bearer network should be pre-configured. The following POC1 and POC3 in the LTE bearer network both represent Border Gateway Protocol neighboring devices. An optional way to configure the nodes related to the LTE bearer network is as follows:

The local POC3 connected to the local CSG, the POC1 connected to the local POC3, and the peer POC3 respectively connected to the POC1 and the peer CSG are configured with the HVPN (Hierarchical Virtual Private Network, hierarchical virtual private network) function. At the same time, the local POC3 establishes a BGP neighbor relationship with the local CSG, enables the local POC3 to establish a BGP neighbor relationship with POC1, enables POC1 to establish a BGP neighbor relationship with the peer POC3, enables the peer POC3 to establish a BGP neighbor relationship with the peer CSG, and enables the local POC3 and the peer POC3 to establish a BGP neighbor relationship. and POC1 are both configured as route reflectors, and further, enable the VPNv4 (Virtual Private Network Internet Protocol Version 4) address family function of the local CSG, peer CSG, local POC3, peer POC3, and POC1.

315. The local CSG sends the first confirmation message to the local base station, so that the local base station establishes a signaling connection for the X2 service with the remote base station.

After establishing the X2 service routing channel between the local CSG and the peer CSG, the local end sends a first confirmation message to the base station, so that the local base station establishes an X2 service with the peer base station signaling connection.

In the embodiment of the present invention, if the first request message is an extended DHCP request message, the first confirmation message may also be an extended DHCP confirmation message, and the extended DHCP confirmation message includes the X2 service route that has been successfully established. The ID of the channel.

In the embodiment of the present invention, the local CSG receives the first request message sent from the local base station connected to the local CSG, and obtains the local base station IP address and the peer base station IP address from the first request message , further, the local CSG configures the X2 service routing information of the local CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the local CSG, and the local CSG receives the peer The X2 service routing information of the CSG, so as to establish the X2 service channel, and send the first confirmation message to the local base station, so that the local base station establishes and establishes the signaling connection of the X2 service with the remote base station. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

Please refer to FIG. 8 . FIG. 8 is a schematic flowchart of a fifth embodiment of a method for establishing an X2 service signaling connection according to the present invention. For ease of understanding, please also refer to FIG. 7 , which is a schematic diagram of a LTE bearer network. Wherein, both POC1 and POC3 in FIG. 7 are BGP neighbor devices. As shown in Figure 8, the method includes:

321. The local CSG receives a first request message sent from the local base station connected to the local CSG, where the first request message includes the IP address of the local base station and the IP address of the local base station to establish X2 service communication with the local base station. The IP address of the peer base station and the identifier requesting to establish the X2 service routing channel.

322. The local CSG parses the first request message, and obtains the IP address of the local base station and the IP address of the remote base station.

Please refer to the description in the first embodiment of the method for establishing an X2 service signaling connection in the present invention for the CSG device types in 321 and 322 and the implementation manner of the first request message, and details are not repeated here.

In order to enable the local POC3 to obtain the VPN routing information and BGPLabel community attributes of the peer CSG, and the peer POC3 to obtain the VPN routing information and BGP Label community attributes of the local CSG, it is necessary to pre-configure the relevant nodes of the LTE bearer network. Both POC1 and POC3 of the following LTE bearer network represent border gateway protocol neighbor devices. Wherein, the networking structure of the LTE bearer network may refer to FIG. 7 . A method of configuring the LTE bearer network is as follows:

The local CSG, peer CSG, local POC3, POC1 connected to local POC3, and peer POC3 connected to POC1 and peer CSG are all configured with MPLS (Multiprotocol Label Switching, multi-protocol label switching) function. The local POC3 establishes a BGP neighbor relationship with the local CSG, enables the local POC3 to establish a BGP neighbor relationship with POC1, enables POC1 to establish a BGP neighbor relationship with the peer POC3, and enables the peer POC3 to establish a BGP neighbor relationship with the peer CSG. Further, enable the local end BGP Label reflection function and VPNv4 address family function of CSG, peer CSG, local POC3, peer POC3, and POC1;

MPLS is a way to increase the speed at which packets are forwarded. Two nodes that have established a BGP neighbor can communicate directly. When a node configured as a BGP Label reflector receives Label routing information, it directly forwards the Label routing information to adjacent nodes. After the LTE bearer network completes the above configuration, the local CSG executes 323 .

323. The local CSG sets the exported RT parameter of the first VRF and the community attribute in the BGP Label route update message as the third parameter, and the local CSG sends the VPN route of the first VRF to the BGP neighbor device connected to the local CSG Information and BGP Label routing update message, wherein, the first VRF is the VRF corresponding to the X2 service on the local CSG, and the third parameter is obtained by converting the IP address of the local base station.

Wherein, the BGP neighbor device of the local CSG in FIG. 8 is the local POC3. Further, before releasing the first VRF, the local CSG adds routing information from the local CSG to the local base station to the first VRF.

Similarly, the peer CSG also sends VPN routing information and BGP label routing update messages corresponding to the X2 service to the peer BGP neighbor device connected to the peer CSG (the peer BGP neighbor device is the peer POC3, as shown in Figure 7). In this document, the derived RT in the X2 service VPN routing information of the peer CSG is set to be obtained by converting the IP address of the peer base station. Further, before publishing the VPN routing information corresponding to the X2 service, the opposite CSG adds the routing information from the opposite CSG to the opposite base station in the VRF corresponding to the X2 service.

Further, the X2 service VPN routing information of the local CSG and the community attribute of the BGP label reach the remote POC3 after being reflected by the local POC3 and POC1. The X2 service VPN routing information of the peer CSG and the community attribute of the BGP label are reflected by the peer POC3 and POC1 to the local POC3, so that the local POC3 obtains the routing information to the peer CSG, and the peer POC3 also obtains the route information to the local end CSG routing information.

324. The local CSG sends VPN ORF and BPG ORF messages to the local BGP neighbor device, wherein the imported RT parameter in the VPN ORF message is set as the fourth parameter, and the community attribute in the BPG ORF message is set as the fourth parameter, The fourth parameter is obtained by converting the IP address of the peer base station.

In the above 323, the derived RT parameter in the VPN routing information corresponding to the X2 service released by the peer CSG is the same as the fourth parameter in the above 324.

325. The local CSG receives the VPN routing information and the BGP Label routing information sent by the local BGP neighbor device, wherein the VPN routing information and the BGP Label routing information are the VPN ORF packets and the BGP label received by the local BGP neighbor device respectively. After the ORF message, the fourth parameter is obtained, and the VPN routing information and BGP Label routing information sent after the fourth parameter is successfully matched with the local routing information.

Among them, ORF is the egress routing filter. After receiving the ORF, the receiver only returns the routing information required in the ORF to the sender, and other irrelevant routing information does not need to be returned. The local POC3 has obtained the X2 service VPN routing information and the BGPLabel community attribute sent by the peer CSG. After the local POC3 obtains the fourth parameter, it can directly match the X2 service VPN routing information and BGP Label routing information for the local CSG according to the fourth parameter.

326. The local CSG sends the first confirmation message to the local base station, so that the local base station establishes a signaling connection for the X2 service with the remote base station.

After establishing the X2 service routing channel between the local CSG and the peer CSG, the local end sends a first confirmation message to the base station, so that the local base station establishes a signaling connection for the X2 service with the peer base station.

In the embodiment of the present invention, if the first request message is an extended DHCP request message, the first confirmation message may also be an extended DHCP confirmation message, and the extended DHCP confirmation message includes the X2 service route that has been successfully established. The ID of the channel.

In the embodiment of the present invention, the local CSG receives the first request message sent from the local base station connected to the local CSG, and obtains the local base station IP address and the peer base station IP address from the first request message , further, the local CSG configures the X2 service routing information of the local CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the local CSG, and the local CSG receives the peer The X2 service routing information of the CSG, so as to establish the X2 service routing channel, and send the first confirmation message to the local base station, so that the local base station establishes and establishes the X2 service signaling connection with the remote base station. Since the X2 service routing channel between the local CSG and the remote CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the remote base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

The present invention also provides a base station embodiment. Please refer to FIG. 9 , which is a schematic structural diagram of a first embodiment of a base station according to the present invention. As shown in the figure, the base station 40 includes a sending module 403 and a service provisioning module 404 .

The sending module 403 sends a first request message to the cellular node gateway 41 connected to the base station 40, wherein the first request message includes the IP address of the base station 40, the IP address of the peer base station to establish X2 service communication with the base station 40, and the request Establish the identification of the X2 service routing channel.

The service opening module 404 receives the first confirmation message sent by the cellular node gateway 41, and establishes a signaling connection with the X2 service between the peer base station, wherein the first confirmation message is between the local CSG and the peer CSG For the message sent after the X2 service routing channel is established, the peer CSG is the CSG connected to the peer base station.

The base station 40 further includes a receiving module 401 and an analyzing module 402 . The receiving module 401 is configured to receive the X2 service communication establishment message sent from the mobility management entity 42 . Among them, the mobility management entity 42 can perceive the base station 40 and the opposite base station that need to carry out X2 service communication, and encapsulate the IP addresses of the base station 40 and the opposite end base station in the establishment of X2 service communication message, and establish the X2 service communication message The text is sent to the base station 40 and the opposite base station respectively. The parsing module 402 is used for parsing the establishing X2 service communication message, and obtaining the IP address of the peer base station to establish X2 service communication with the base station 40 .

Optionally, the first request message is an extended dynamic host configuration protocol DHCP request message, and the first confirmation message is an extended DHCP confirmation message.

The base station provided by the embodiment of the present invention sends the first request message to the CSG connected to the base station, and the base station receives the first confirmation message sent by the local CSG after completing the establishment of the X2 service routing channel according to the first request message After that, an X2 service signaling connection with the peer base station is established. Since the X2 service routing channel between the local CSG and the peer CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the base station and the peer base station, which can improve the efficiency of the base station. The success rate of establishing the X2 service signaling connection between them, and reduce the workload of manual planning and establishment of the X2 service routing channel; in addition, because the CSG only needs to learn the routing information of the CSG that needs to establish the X2 service routing channel, it can reduce the The operating load of CSG improves the stability of CSG.

The present invention also provides a base station embodiment. Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of a second embodiment of a base station according to the present invention. As shown in the figure, the base station 50 includes a processor 501 , a memory 502 , a network interface 503 and a bus 504 . Processor 501 , memory 502 and network interface 503 are all connected to bus 504 . The processor 501 is configured to send a first request message to the cellular node gateway 51 connected to the base station 50 through the network interface 503, wherein the first request message includes the IP address of the base station 40, the peer end to establish X2 service communication with the base station 40 The IP address of the base station and the identification of the request to establish the X2 service routing channel; and receiving the first confirmation message sent from the cellular node gateway 51 through the network interface 503, and establishing a signaling connection with the X2 service between the opposite base station, wherein, The first confirmation message is a message sent after the X2 service routing channel between the local CSG and the peer CSG is established, and the peer CSG is a CSG connected to the peer base station.

Wherein, the above-mentioned process executed by the processor 501 may be completed under the control of a program, and the program is stored in the memory 502 , and when the above-mentioned operation is required, the program is transferred into the processor 501 and completed under the control of the processor 501 . Of course, the above processing process can also be completed by hardware.

Optionally, the processor 501 also executes program instructions for receiving the establishing X2 service communication message sent from the mobility management entity through the network interface 503; analyzing the establishing X2 service communication message to obtain the IP address of the peer base station.

Optionally, the first request message is an extended dynamic host configuration protocol DHCP request message, and the first confirmation message is an extended DHCP confirmation message.

For the beneficial effects of the base station provided by the embodiments of the present invention, please refer to the description of the beneficial effects in the first embodiment of the base station of the present invention, and details are not repeated here.

The invention also provides the implementation of the cellular node gateway. Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of a first embodiment of a cellular node gateway according to the present invention. As shown in the figure, the cellular node gateway 60 includes: a receiving module 601 , an analyzing module 602 and a configuring module 603 . The receiving module 601 receives the first request message sent by the base station 61, wherein the first request message includes the IP address of the base station 61, the IP address of the base station 63 to establish X2 service communication with the base station 61, and the request to establish an X2 service routing channel logo.

Optionally, the first request message can be an extended DHCP request message, and the format of the extended DHCP request message is set to be the same as the format of the extended DHCP request message set in the first embodiment of the method for establishing an X2 service signaling connection in the present invention , which will not be repeated here.

The parsing module 602 is configured to parse the first request message to obtain the IP address of the base station 61 and the IP address of the base station 63 . The configuration module 603 configures the X2 service routing information according to the IP address of the base station 61 and the IP address of the base station 63, and publishes the routing information, and receives the X2 service routing information of the cellular node gateway 62 connected to the base station 63, thereby establishing a connection with the cellular node gateway X2 service routing channel between 62.

Among them, in order to allow the configuration module 603 to complete the establishment of the X2 service routing channel with the cellular node gateway 62, it is necessary to pre-configure the nodes related to the LTE bearer network, and the following LTE bearer network POC1 and POC3 are represented as border gateway protocol neighbor devices , one of the ways to configure the nodes related to the LTE bearer network is as follows:

The POC3 connected to the cellular node gateway 60, the POC1 connected to the POC3, and the POC3 connected to the POC1 and the cellular node gateway 62 are all configured with the HVPN function. Connect the POC3 of cellular node gateway 60 and POC1 to establish BGP neighbor, make POC1 establish BGP neighbor with the POC3 that connects cellular node gateway 62, make the POC3 that connects cellular node gateway 62 establish BGP neighbor with cellular node gateway 62, and make the connection cellular node gateway The POC3 of 60, the POC3 and POC1 connected to the cellular node gateway 62 are all configured as route reflectors, and further, enable the cellular node gateway 60, the cellular node gateway 62, the POC3 connected to the cellular node gateway 60, and the POC3 connected to the cellular node gateway 62 And the VPNv4 address family function of POC1.

Optionally, the configuration module 603 may be specifically configured to: set the imported RT parameter and the exported RT parameter of the first VRF as the first parameter and the second parameter respectively, and publish the VPN routing information of the first VRF, wherein the first VRF is the VRF corresponding to the X2 service on the cellular node gateway 60; the first parameter is obtained by converting the IP address of the base station 61 according to the first conversion rule, and the second parameter is obtained by converting the IP address of the base station 63 according to the second conversion rule; received The VPN routing information of the second VRF corresponding to the X2 service on the cellular node network 62 reflected by the POC3 connected to the cellular node gateway 60, the imported RT parameter in the VPN routing information of the second VRF is determined by the IP address of the base station 63 according to the first The second conversion rule is converted, and the derived RT parameter in the VPN routing information of the second VRF is converted from the IP address of the base station 61 according to the first conversion rule.

Another way of configuring the relevant nodes of the LTE bearer network is as follows:

The cellular node gateway 60, the cellular node gateway 62, the POC3 connected to the cellular node gateway 60, the POC1 connected to the POC3, and the POC3 connected to the POC1 and the cellular node gateway 62 respectively are equipped with MPLS functions, and at the same time, the POC3 connected to the cellular node gateway 60 Establish a BGP neighbor relationship with the cellular node gateway 60, POC3 connected to the cellular node gateway 60 establishes a BGP neighbor relationship with POC1, POC1 establishes a BGP neighbor relationship with the POC3 connected to the cellular node gateway 62, and establishes a BGP neighbor relationship between POC3 connected to the cellular node gateway 62 and the cellular node gateway 62 , further, enabling the cellular node gateway 60, the cellular node gateway 62, the POC3 connected to the cellular node gateway 60, the POC3 connected to the cellular node gateway 62, and the BGP Label reflection function and the VPNv4 address family function of POC1;

Wherein, after the relevant nodes of the LTE bearer network complete the above configuration, the configuration module 603 can be specifically used to set the derived RT parameter of the first VRF and the community attribute in the border gateway protocol label BGP Label routing update message as the third parameter , wherein the first VRF is the VRF corresponding to the X2 service on the cellular node gateway 60, and the third parameter is converted from the IP address of the base station 61; the VPN routing information and BGP of the first VRF are sent to the POC3 connected to the cellular node gateway 61 Label routing update message; POC3 sends VPN ORF message and BPG ORF message, wherein the imported RT parameter in the VPN ORF message is set as the fourth parameter, the community attribute in the BPG ORF message is set as the fourth parameter, and the fourth The parameters are converted from the IP address of the peer base station; the VPN routing information and the BGP Label routing information sent by the BGP neighbor device are received, and the VPN routing information and the BGP Label routing information are respectively the VPN ORF packets received by the BGP neighbor device After matching the BGP ORF message, the fourth parameter is obtained, and the VPN routing information and BGPLabel routing information sent after the fourth parameter is successfully matched with the local routing information

After completing the establishment of the X2 service routing channel, the sending module 604 sends a first confirmation message to the base station 61, so that the base station 61 proposes an X2 service signaling connection with the base station 63.

Optionally, the first confirmation message is an extended DHCP confirmation message, and the extended DHCP confirmation message includes an identifier that the X2 service routing channel has been established.

The CSG provided in the embodiment of the present invention receives the first request message sent from the local base station connected to the CSG, and obtains the IP address of the local base station and the IP address of the opposite base station from the first request message , further, the CSG configures the X2 service routing information of the CSG according to the IP address of the local base station and the IP address of the peer base station, and publishes the X2 service routing information of the CSG, and the CSG receives the peer end The X2 service routing information of the CSG establishes an X2 service routing channel, and sends a first confirmation message to the local base station, so that the local base station establishes and establishes a signaling connection for the X2 service with the remote base station. Since the X2 service routing channel between the CSG and the peer CSG is automatically established on demand, the required X2 service routing channel has been established before the X2 service signaling connection is established between the local base station and the peer base station, which can improve The success rate of establishing X2 service signaling connections between base stations, and reduce the workload of manual planning and establishment of X2 service routing channels in advance; in addition, since CSG only needs to learn the routing information of CSGs that need to establish X2 service routing channels with it, it can Reduce the operating load of CSG and improve the stability of CSG.

The invention also provides the implementation of the cellular node gateway. Please refer to FIG. 12 . FIG. 12 is a schematic structural diagram of a second embodiment of the cellular node gateway of the present invention. As shown in the figure, the cellular node gateway 70 includes a processor 701 , a memory 702 , a network interface 703 and a bus 704 . The processor 707 , the memory 702 and the network interface 703 are all connected to the bus 704 . The processor 701 is configured to receive the first request message sent from the base station 71 through the network interface 703, parse the first request message, obtain the IP address of the base station 71, the IP address of the base station 73 to establish X2 service communication with the base station, and Request to establish the identification of the X2 service routing channel, and send the routing information configured according to the IP address of the base station 71 and the IP address of the base station 73 through the network interface 703, and receive the route of the cellular node gateway 72 connected to the base station 73 through the network interface 703 information, thereby completing the configuration of the X2 service routing channel, and sending a first confirmation message to the base station 71 through the network interface 703, so that the base station 71 establishes an X2 service signaling connection with the base station 73.

Wherein, the above-mentioned process executed by the processor 701 may be completed under the control of a program, and the program is stored in the memory 702 , and when the above-mentioned operations need to be performed, the program is transferred into the processor and controlled by the processor 701 to complete. Of course, the above processing process can also be completed by hardware.

Optionally, the processor 701 also executes program instructions for setting the imported route target RT parameter and the exported RT parameter of the first VRF as the first parameter and the second parameter respectively, and publishes the VPN route of the first VRF through the network interface 703 information, wherein the first VRF is the VRF corresponding to the X2 service on the cellular node gateway 70, the first parameter is obtained by converting the IP address of the base station 71 according to the first conversion rule, and the second parameter is obtained by converting the IP address of the base station 73 according to the second The conversion rule is converted; and the VPN routing information of the second VRF sent by the cellular node gateway 72 is received through the network interface 703, the second VRF is the VRF corresponding to the X2 service on the cellular node gateway 72, and the VPN routing information of the second VRF The imported RT parameter in is obtained by converting the IP address of base station 73 according to the second conversion rule, and the derived RT parameter in the VPN routing information of the second VRF is obtained by converting the IP address of base station 71 according to the first conversion rule.

Optionally, the processor 701 also executes a program instruction for setting the derived RT parameter of the first VRF and the community attribute in the BGP Label routing update message as the third parameter, wherein the first VRF is connected to the cellular node gateway 70 The VRF corresponding to the X2 service, the third parameter is exchanged by the IP address of the base station 71; and the VPN routing information and the BGP Label routing update message of the first VRF are sent to the POC3 connected to the cellular node gateway 70 through the network interface 703; The network interface 703 sends a VPN ORF message and a BPG ORF message to the POC3 connected to the cellular node gateway 70, wherein the import RT parameter in the VPN ORF message is set to the fourth parameter, and the community attribute in the BPG ORF message is set to the fourth parameter Parameter, the 4th parameter is obtained by the IP address conversion of base station 73; And receive the VPN route information and BGP Label route information that the POC3 that connects cellular node gateway 70 sends through network interface 703, wherein, VPN route information and BGP Label route information respectively After the POC3 connected to the cellular node gateway 70 parses the received VPN ORF message and the BGP ORF message, the fourth parameter is obtained, and the VPN routing information and BGPLabel routing information sent after the fourth parameter is successfully matched with its local routing information .

Wherein, POC3 and POC1 in FIG. 12 are both BGP neighbor devices.

For the beneficial effects of the cellular node gateway provided in the embodiments of the present invention, please refer to the description of the beneficial effects in the first embodiment of the cellular node gateway of the present invention, and details are not repeated here.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (8)

1. A method for establishing an X2 traffic signaling connection, the method comprising:

a home terminal base station sends a first request message to a home terminal cellular node gateway (CSG) connected with the home terminal base station, wherein the first request message comprises an IP address of the home terminal base station, an IP address of an opposite terminal base station which needs to carry out X2 service communication with the home terminal base station and an identifier for requesting to establish an X2 service routing channel;

after receiving a first acknowledgement message sent by the home terminal CSG, the home terminal base station establishes a signaling connection with an X2 service between the home terminal CSG and the opposite terminal CSG, where the first acknowledgement message is a message sent after an X2 service routing channel between the home terminal CSG and the opposite terminal CSG is established, the opposite terminal CSG is a CSG connected to the opposite terminal base station, the home terminal CSG configures X2 service routing information of the home terminal CSG according to an IP address of the home terminal base station and an IP address of the opposite terminal base station, and issues X2 service routing information of the home terminal CSG, and the home terminal CSG receives X2 service routing information of the opposite terminal CSG, thereby establishing an X2 service routing channel between the home terminal CSG and the opposite terminal CSG, where,

the home terminal CSG configures X2 service routing information of the home terminal CSG, and issues X2 service routing information of the home terminal CSG, including:

the home terminal CSG sets an import route target RT parameter and an export RT parameter of a first virtual private network forwarding instance VRF as a first parameter and a second parameter respectively, and publishes virtual private network VPN routing information of the first VRF, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, the first parameter is obtained by converting an IP address of a home terminal base station according to a first conversion rule, and the second parameter is obtained by converting the IP address of an opposite terminal base station according to a second conversion rule;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG receives VPN routing information of a second VRF sent by the opposite terminal CSG, wherein the second VRF is a VRF corresponding to an X2 service on the opposite terminal CSG, an imported RT parameter in the VPN routing information of the second VRF is obtained by converting an IP address of the opposite terminal base station according to the second conversion rule, and an exported RT parameter in the VPN routing information of the second VRF is obtained by converting the IP address of the home terminal base station according to the first conversion rule; or

The home terminal CSG configuring X2 service routing information of the home terminal CSG, and issuing X2 service routing information of the home terminal CSG includes:

the home terminal CSG sets a community attribute in a derived RT parameter and a BGP Label routing update message of a first VRF as a third parameter, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, and the third parameter is obtained by exchanging an IP address of a home terminal base station;

the home terminal CSG sends VPN routing information of the first VRF and the BGP Label routing update message to a BGP neighbor device connected with the home terminal CSG;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG sends a VPN ORF message and a BPG ORF message to the BGP neighbor device, wherein an imported RT parameter in the VPN ORF message is set as a fourth parameter, a community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is obtained by IP address conversion of the opposite terminal base station;

and the home terminal CSG receives VPN routing information and BGP Label routing information sent by the BGP neighbor equipment, wherein the VPN routing information and the BGP Label routing information are respectively used for obtaining the fourth parameter after analyzing the received VPN ORF message and BGPORF message by the BGP neighbor equipment, and the VPN routing information and the BGP Label routing information are sent after successfully matching the fourth parameter with the local routing information.

2. The method according to claim 1, wherein before the home base station sends the first request packet to the home cellular node gateway CSG connected to the home base station, the method further comprises:

the home terminal base station receives an X2 service communication establishing message sent by a mobile management entity;

and the local terminal base station analyzes the establishing X2 service communication message to obtain the IP address of the opposite terminal base station.

3. The method according to claim 1 or 2, wherein the first request message is an extended dynamic host configuration protocol, DHCP, request message and the first acknowledgement message is an extended DHCP acknowledgement message.

4. A method for establishing an X2 traffic signaling connection, the method comprising:

a home terminal cellular node gateway (CSG) receives a first request message sent by a home terminal base station connected with the home terminal CSG, wherein the first request message comprises an IP address of the home terminal base station, an IP address of an opposite terminal base station which needs to carry out X2 service communication with the home terminal base station and an identifier for requesting to establish an X2 service routing channel;

the home terminal CSG analyzes the first request message to obtain the IP address of the home terminal base station and the IP address of the opposite terminal base station;

the home terminal CSG configures X2 service routing information of the home terminal CSG according to the IP address of the home terminal base station and the IP address of the opposite terminal base station, and issues X2 service routing information of the home terminal CSG, and the home terminal CSG receives X2 service routing information of the opposite terminal CSG, thereby establishing an X2 service routing channel between the home terminal CSG and the opposite terminal CSG, wherein the opposite terminal CSG is the CSG connected with the opposite terminal base station;

after establishing an X2 service routing channel between the home terminal CSG and the opposite terminal CSG, the home terminal CSG sends a first confirmation message to the home terminal base station, so that the home terminal base station establishes a signaling connection with an X2 service between the opposite terminal base station; wherein,

the home terminal CSG configures X2 service routing information of the home terminal CSG, and issues X2 service routing information of the home terminal CSG, including:

the home terminal CSG sets an import route target RT parameter and an export RT parameter of a first virtual private network forwarding instance VRF as a first parameter and a second parameter respectively, and publishes virtual private network VPN routing information of the first VRF, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, the first parameter is obtained by converting an IP address of a home terminal base station according to a first conversion rule, and the second parameter is obtained by converting the IP address of an opposite terminal base station according to a second conversion rule;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG receives VPN routing information of a second VRF sent by the opposite terminal CSG, wherein the second VRF is a VRF corresponding to an X2 service on the opposite terminal CSG, an imported RT parameter in the VPN routing information of the second VRF is obtained by converting an IP address of the opposite terminal base station according to the second conversion rule, and an exported RT parameter in the VPN routing information of the second VRF is obtained by converting the IP address of the home terminal base station according to the first conversion rule; or

The home terminal CSG configuring X2 service routing information of the home terminal CSG, and issuing X2 service routing information of the home terminal CSG includes:

the home terminal CSG sets a community attribute in a derived RT parameter and a BGP Label routing update message of a first VRF as a third parameter, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, and the third parameter is obtained by exchanging an IP address of a home terminal base station;

the home terminal CSG sends VPN routing information of the first VRF and the BGP Label routing update message to a BGP neighbor device connected with the home terminal CSG;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG sends a VPN ORF message and a BPG ORF message to the BGP neighbor device, wherein an imported RT parameter in the VPN ORF message is set as a fourth parameter, a community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is obtained by IP address conversion of the opposite terminal base station;

and the home terminal CSG receives VPN routing information and BGP Label routing information sent by the BGP neighbor equipment, wherein the VPN routing information and the BGP Label routing information are respectively used for obtaining the fourth parameter after analyzing the received VPN ORF message and BGPORF message by the BGP neighbor equipment, and the VPN routing information and the BGP Label routing information are sent after successfully matching the fourth parameter with the local routing information.

5. A base station, comprising:

a sending module, configured to send a first request packet to a home-end cellular node gateway CSG connected to the base station, where the first request packet includes an IP address of the base station, an IP address of an opposite-end base station that is to perform X2 service communication with the base station, and an identifier requesting to establish an X2 service routing channel;

a service provisioning module, configured to establish a signaling connection with an X2 service between the home CSG and the opposite CSG after receiving a first acknowledgement packet sent by the home CSG, where the first acknowledgement packet is a packet sent after establishing an X2 service routing channel between the home CSG and the opposite CSG, the opposite CSG is a CSG connected to the opposite base station, the home CSG configures X2 service routing information of the home CSG according to an IP address of the base station and an IP address of the opposite base station, and issues X2 service routing information of the home CSG, and the home CSG receives X2 service routing information of the opposite CSG, so as to establish an X2 service routing channel between the home CSG and the opposite CSG,

the home terminal CSG configures X2 service routing information of the home terminal CSG, and issues X2 service routing information of the home terminal CSG, including:

the home terminal CSG sets an import route target RT parameter and an export RT parameter of a first virtual private network forwarding instance VRF as a first parameter and a second parameter respectively, and publishes virtual private network VPN routing information of the first VRF, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, the first parameter is obtained by converting an IP address of the base station according to a first conversion rule, and the second parameter is obtained by converting the IP address of the opposite terminal base station according to a second conversion rule;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG receives VPN routing information of a second VRF sent by the opposite terminal CSG, wherein the second VRF is a VRF corresponding to an X2 service on the opposite terminal CSG, an imported RT parameter in the VPN routing information of the second VRF is obtained by converting an IP address of the opposite terminal base station according to the second conversion rule, and an exported RT parameter in the VPN routing information of the second VRF is obtained by converting the IP address of the base station according to the first conversion rule; or

The home terminal CSG configuring X2 service routing information of the home terminal CSG, and issuing X2 service routing information of the home terminal CSG includes:

the home terminal CSG sets a community attribute in a derived RT parameter and a BGP Label routing update message of a first VRF as a third parameter, wherein the first VRF is a VRF corresponding to an X2 service on the home terminal CSG, and the third parameter is obtained by exchanging an IP address of the base station;

the home terminal CSG sends VPN routing information of the first VRF and the BGP Label routing update message to a BGP neighbor device connected with the home terminal CSG;

the receiving, by the home terminal CSG, the X2 service routing information of the opposite terminal CSG includes:

the home terminal CSG sends a VPN ORF message and a BPG ORF message to the BGP neighbor device, wherein an imported RT parameter in the VPN ORF message is set as a fourth parameter, a community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is obtained by IP address conversion of the opposite terminal base station;

and the home terminal CSG receives VPN routing information and BGP Label routing information sent by the BGP neighbor equipment, wherein the VPN routing information and the BGP Label routing information are respectively used for obtaining the fourth parameter after analyzing the received VPN ORF message and BGPORF message by the BGP neighbor equipment, and the VPN routing information and the BGP Label routing information are sent after successfully matching the fourth parameter with the local routing information.

6. The base station of claim 5, wherein the base station further comprises:

the receiving module is used for receiving an X2 service communication establishing message sent by a mobile management entity;

and the analysis module is used for analyzing the X2 service communication establishing message to obtain the IP address of the opposite terminal base station.

7. The base station according to claim 5 or 6, wherein the first request message is an extended dynamic host configuration protocol, DHCP, request message, and the first acknowledgement message is an extended DHCP acknowledgement message.

8. A cellular node gateway, CSG, comprising:

a receiving module, configured to receive a first request packet sent from a base station connected to the CSG, where the first request packet includes an IP address of the base station, an IP address of an opposite-end base station that is to perform X2 service communication with the base station, and an identifier requesting to establish an X2 service routing channel;

the analysis module is used for analyzing the first request message to obtain the IP address of the base station and the IP address of the opposite-end base station;

a configuration module, configured to configure X2 service routing information according to the IP address of the base station and the IP address of the opposite terminal base station, and issue the X2 service routing information, and receive the X2 service routing information of an opposite terminal CSG, so as to establish an X2 service routing channel with the opposite terminal CSG, where the opposite terminal CSG is a CSG connected to the opposite terminal base station;

a sending module, configured to send a first acknowledgement packet to the base station after an X2 service routing channel between the base station and the opposite CSG is established, so that the base station establishes a signaling connection with an X2 service between the opposite CSG and the base station; wherein,

the configuration module is specifically configured to set an import route target RT parameter and an export RT parameter of a VRF of a first virtual private network forwarding instance to a first parameter and a second parameter, respectively, and issue virtual private network VPN routing information of the first VRF, where the first VRF is a VRF corresponding to an X2 service on the CSG, the first parameter is obtained by converting an IP address of the base station according to a first conversion rule, and the second parameter is obtained by converting an IP address of the opposite-end base station according to a second conversion rule; receiving VPN routing information of a second VRF sent by the opposite terminal CSG, wherein the second VRF is a VRF corresponding to an X2 service on the opposite terminal CSG, an imported RT parameter in the VPN routing information of the second VRF is obtained by converting an IP address of the opposite terminal base station according to the second conversion rule, and an exported RT parameter in the VPN routing information of the second VRF is obtained by converting the IP address of the base station according to the first conversion rule; or

The configuration module is specifically configured to set a community attribute in a BGP Label route update message and an export RT parameter of a first VRF as a third parameter, where the first VRF is a VRF corresponding to an X2 service on the CSG, and the third parameter is obtained by converting an IP address of the base station; sending VPN routing information of the first VRF and the BGP Label routing update message to a BGP neighbor device connected with the CSG; sending a VPN ORF message and a BPG ORF message to the BGP neighbor device, wherein an imported RT parameter in the VPN ORF message is set as a fourth parameter, a community attribute in the BPG ORF message is set as the fourth parameter, and the fourth parameter is obtained by converting an IP address of the opposite-end base station; receiving VPN routing information and BGP Label routing information sent by the BGP neighbor equipment, wherein the VPN routing information and the BGP Label routing information are respectively the VPN ORF message and the BGPORF message which are received by the BGP neighbor equipment after analyzing, acquiring the fourth parameter, and sending the VPN routing information and the BGP Label routing information after successfully matching the fourth parameter with the local routing information.