CN102711281A - Method and device for establishing X2 link between base stations and base stations - Google Patents

Abstract

Embodiments of the present invention provide a method, device, and base station for establishing an X2 link between base stations. The method includes: when the first base station establishes an X2 link with the second base station, the first base station judges that its logical role is the second The first role is still the second role. The link negotiation level of the first role is higher than that of the second role; As a public flow; if it is judged as the second role, the first base station uses the flow selected by the second base station for sending the X2 link request information as a public flow; the first base station uses the public flow to establish an X2 link with the second base station. The present invention can solve the problem of common flow selection conflict existing in the process of establishing X2 link between base stations.

Description

Method, device and base station for establishing X2 link between base stations

technical field

The present invention relates to the technical field of mobile communication, in particular to a method, a device and a base station for establishing an X2 link between base stations.

Background technique

In the Long Term Evolution (LTE) mobile communication system, signaling interaction between base stations is required to realize X2-based handover, load balancing and other cooperative functions between base stations, and to realize these functions, it is necessary to establish X2 link.

The X2 link is carried on the stream control transmission protocol SCTP (Stream Control Transmission Protocol), and the signaling link is established through signaling interaction. During the signaling interaction process of X2, the SCTP flow is divided into public flow and dedicated flow. The public flow is used to transmit public signaling (non-UE-related signaling), and the dedicated flow is used to transmit dedicated signaling (UE-related signaling).

In the SCTP protocol, the base station can only select one SCTP stream as a public stream for transmitting public signaling, and the X2 link establishment signaling can be initiated by the local base station, that is, when both base stations initiate link establishment , the common streams selected by each are inconsistent, resulting in the failure of common signaling transmission between the two base stations through the same stream.

In addition, there are many methods for selecting public streams, some of which are to select specific streams as public streams, and some are to select the stream that receives the first public signaling as public streams; When receiving packets, rely on the flow of the first public signaling sent by the peer base station as the public flow.

It can be seen from the above that when establishing the X2 link, the way to select the common flow is different. In this way, when the signaling interaction between base stations is performed, it is easy to cause abnormalities, and in serious cases, it will cause the X2 link to be incorrectly established. success.

Contents of the invention

Embodiments of the present invention provide a method, a device and a base station for establishing an X2 link between base stations, so as to solve the existing problem of common stream selection conflicts existing in the process of establishing an X2 link between base stations.

Based on the above problems, an embodiment of the present invention provides a method for establishing an X2 link between base stations, including: when a first base station establishes an X2 link with a second base station, the first base station judges that its logical role is the second The first role is still the second role, and the link negotiation level of the first role is higher than the link negotiation level of the second role; if it is judged to be the first role, the first base station will use the one selected by itself for sending X2 The flow of the link request information is used as a public flow; if it is determined to be the second role, the first base station uses the flow selected by the second base station for sending the X2 link request information as a public flow; the first base station Establish an X2 link with the second base station by using the common flow.

An apparatus for establishing an X2 link between base stations provided in an embodiment of the present invention includes:

A judgment module, configured to judge whether the logical role of the base station to which it belongs is the first role or the second role when the base station to which it belongs establishes an X2 link with other base stations, and the link negotiation level of the first role is higher than that of the link of the second role Road negotiation level; the public flow determination module is used to determine the flow for sending the X2 link request information selected by the base station as the public flow if the judging module judges it to be the first role; if the judging module judges it to be the second role, then Taking the stream selected by the other base stations for sending X2 link request information as a common stream; a first establishing module, configured to use the common stream determined by the judging module to establish an X2 link with the other base stations.

The base station provided by the embodiment of the present invention includes the above-mentioned apparatus for establishing an X2 link between the base stations provided by the embodiment of the present invention.

The beneficial effects of the embodiments of the present invention include: a method, device and base station for establishing an X2 link between base stations provided by the embodiment of the present invention, in the process of establishing an X2 link between a base station and other base stations, using the logical role of the base station itself, When the base station is in the first role, use the flow selected by the base station itself for sending X2 link request information as a common flow, and use this common flow with other base stations to complete the establishment of the X2 link; otherwise, when the base station is in the second role In the role, use the flow selected by other base stations for sending X2 link request information as a common flow, and use this common flow with other base stations to complete the establishment of the X2 link. The first role and the second role are distinguished by different link negotiation levels. It can be seen that the present invention realizes the selection of the public flow when establishing the X2 link through the logic role of the base station itself, and solves the problem of establishing an X2 link between base stations. The problem of public flow selection conflict in the process of linking is eliminated, and the success rate of link establishment is also improved.

Description of drawings

FIG. 1 is a flowchart of a method for establishing an X2 link between base stations provided by an embodiment of the present invention;

FIG. 2 is a flow chart of establishing an X2 link in the first case provided by an embodiment of the present invention;

FIG. 3 is a flow chart of establishing an X2 link in the first manner in the second case provided by an embodiment of the present invention;

FIG. 4 is a flow chart of establishing an X2 link in a second manner in the second case provided by an embodiment of the present invention;

FIG. 5 is one of the structural diagrams of an apparatus for establishing an X2 link between base stations according to an embodiment of the present invention;

FIG. 6 is the second structural diagram of an apparatus for establishing an X2 link between base stations according to an embodiment of the present invention;

FIG. 7 is a third structural diagram of an apparatus for establishing an X2 link between base stations according to an embodiment of the present invention.

Detailed ways

A specific implementation manner of a method and device for establishing an X2 link between base stations and a base station provided in an embodiment of the present invention will be described below with reference to the drawings in the description.

The embodiment of the present invention provides a method for establishing an X2 link between base stations. When a base station and another base station need to establish an X2 link, they are equal to each other. For the convenience of description, the base station is named as the first Base station, another base station is named as the second base station, and the following embodiments of the present invention are described on the side of the first base station. The implementation manners are the same, and the description here mainly takes the first base station as an execution subject.

An embodiment of the present invention provides a method for establishing an X2 link between base stations. FIG. 1 is a flowchart of a method for establishing an X2 link between base stations provided by an embodiment of the present invention. The process specifically includes the following steps:

S101: When the first base station establishes an X2 link with the second base station, the first base station judges that its logical role is the first role or the second role; if it is judged to be the first role, execute step S102; if it is judged to be the second role role, go to step S103;

S102: The first base station uses the stream selected by itself for sending the X2 link request information as a common stream, and then executes step S104;

S103: the first base station uses the stream selected by the second base station for sending the X2 link request information as a common stream, and then executes step S104;

S104: The first base station establishes an X2 link with the second base station by using a common flow.

Preferably, the link negotiation level of the first role is higher than the link negotiation level of the second role. In the embodiment of the present invention, the first role and the second role can establish an SCTP link process between the first base station and the second base station For example, one of the two sends INIT and COOKIE ECHO signaling, and the other responds to INIT ACK signaling. Using the difference in this signaling, the first base station can be defined as the first role or the second role, and the second The corresponding definition of the two base stations is the second role or the first role, that is, the first role can be defined as a server, and the second role can be defined as a client. Of course, the first role can also be defined as a client, and the second role can be defined as a server. end. The embodiment of the present application is not limited to the foregoing role definition manner.

Further, before the above step S101, the following steps may also be included:

The first base station establishes an SCTP link with the second base station;

The first base station obtains its logical role.

In the embodiment of the present invention, when the first base station and the second base station establish the X2 link, the selection of the common flow can be divided into the following two situations:

First case:

Only the first base station or the second base station unilaterally initiates the request to establish the X2 link. In this case, the process of selecting a common stream is implemented in the following manner:

The first base station determines that it is the first role, and the first base station selects a flow for sending the X2 link request information from the streams defined by SCTP to send the X2 link request information to the second base station, and uses the selected flow as a common flow;

The first base station determines that it is the second role, and the first base station receives the stream used for the X2 link request information selected by the second base station from the streams defined by SCTP, and uses the received stream as a common stream.

The process of establishing the X2 link in the first case above will be described in detail below;

As shown in Figure 2, the process of establishing the X2 link in the first case specifically includes the following steps:

S201: After the SCTP link is established successfully, the first base station and the second base station acquire respective logical roles.

Preferably, in the embodiment of the present invention, for example, the logical role of the first base station is the first role, that is, the server, and in this case, the logical role of the second base station is the second role, that is, the client. Assume that it is agreed that the X2 link establishment request is initiated by the server.

S202: After the first base station determines that its logical role is the first role, it is the server, and selects a stream from the streams defined by SCTP to actively send X2 setup request (SETUPREQUEST) signaling to the second base station.

In step S202, the first base station may be the second role, that is, the client. In this case, the first base station does not send the X2 establishment request to the second base station, but receives the X2 establishment request selected by the second base station for sending the X2 establishment request. The flow of the request information is used as a common flow, and the reply signaling is sent to the second base station through this flow.

S203: When the second base station receives the X2SETUP REQUEST signaling sent by the first base station, according to its logical role as the second role, it no longer sends an X2 link establishment request to the first base station; and the second base station receives the first base station The sent stream, save it and make it a public stream.

S204: The second base station sends an X2 setup response (SETUPRESPONSE) signaling to the first base station through the public flow, and the X2 link is established successfully.

Second case:

The first base station and the second base station simultaneously initiate a request to establish an X2 link. In this case, the process of selecting a common stream is specifically divided into the following two methods:

The first way:

In the first manner, after the SCTP link is successfully established and the first base station obtains its own logical role, the above-mentioned manner of establishing an X2 link between the base stations may further include the following steps:

The first base station selects a stream for sending X2 link request information from streams defined by SCTP;

The first base station sends the X2 link request information to the second base station by using the selected flow, and receives the flow used for the X2 link request information selected by the second base station from the SCTP-defined flows.

The process of establishing the X2 link in the above first mode will be described in detail below, as shown in Figure 3, the process specifically includes the following steps:

S301: After successfully establishing an SCTP link, the first base station and the second base station acquire respective logical roles.

Assume that the logical role of the first base station is the first role, that is, the server. Correspondingly, the logical role of the second base station should be the second role, that is, the client. In this process, it is agreed that the server initiates the X2 link establishment request.

S302: The first base station and the second base station respectively select a stream defined by SCTP, and send X2SETUP REQUEST signaling to the other party.

S303: After receiving the X2SETUP REQUEST signaling sent by the second base station, the first base station takes the stream selected by itself as the public stream according to its logical role as the first role, that is, the server; When sending the X2SETUP REQUEST signaling, according to its logical role as the second role, that is, the client, the stream selected by the first base station is saved and used as a public stream.

S304: The first base station sends the X2SETUP RESPONSE signaling to the second base station through the flow selected by itself, and the second base station sends the X2SETUP RESPONSE signaling to the first base station through the public flow, and the X2 link is established successfully.

The second way:

In the second manner, after the SCTP link is successfully established, before the first base station acquires its own logical role, the following steps may also be included:

The first base station selects a stream for sending X2 link request information from streams defined by SCTP;

The first base station sends the X2 link request information to the second base station by using the selected flow, and receives the flow used for the X2 link request information selected by the second base station from the SCTP-defined flows.

The process of establishing the X2 link in the above second mode will be described in detail below, as shown in Figure 4, the process specifically includes the following steps:

S401: After the SCTP link is successfully established between the first base station and the second base station, the first base station and the second base station respectively select a stream defined by SCTP, and send X2SETUP REQUEST signaling to the other party.

S402: The first base station and the second base station obtain their respective logical roles when receiving the X2SETUP REQUEST signaling sent by the other party.

It is assumed that the logical role of the first base station is the first role, that is, the server, and correspondingly, the logical role of the second base station is the second role, that is, the client. In this process, it is agreed that the server initiates the X2 link establishment request.

S403: The first base station selects its own flow to send the X2SETUP RESPONSE signaling to the second base station, and the second base station uses the flow sent by the first base station to send the X2SETUP RESPONSE signaling to the first base station.

S404: After receiving the X2SETUP REQUEST signaling sent by the second base station, the first base station takes the flow selected by itself as the public flow; the second base station saves the flow selected by the first base station as the public flow, and the X2 link is established successfully.

Based on the same inventive concept, the embodiment of the present invention also provides a device for establishing an X2 link between base stations and a base station, because the principle of the problem solved by the device and the base station is similar to the aforementioned method for establishing an X2 link between base stations , so the implementation of the device and the base station can refer to the implementation of the aforementioned method, and the repetition will not be repeated.

An apparatus for establishing an X2 link between base stations provided in an embodiment of the present invention, as shown in FIG. 5 , specifically includes:

The judging module 501 is used to determine whether the logical role of the base station is the first role or the second role when the base station to which it belongs establishes an X2 link with other base stations, and the link negotiation level of the first role is greater than the link negotiation level of the second role;

The public flow determining module 502 is configured to use the flow selected by the base station for sending the X2 link request information as a public flow if the judging module 501 judges to be the first role; if the judging module 501 judges to be the second role, then use the The stream selected by other base stations for sending X2 link request information is taken as a common stream;

The first establishing module 503 is configured to establish an X2 link with other base stations using the common flow determined by the judging module 501 .

Further, as shown in Figure 5, the device may also include:

The second establishing module 504 is used to establish SCTP links with other base stations before the judging module 501 judges whether the logical role of the base station belongs to the first role or the second role;

The acquiring module 505 is configured to acquire the logical role of the base station to which it belongs.

Further, as shown in FIG. 6, the device may further include: a first sending module 506 or a first receiving module 507, wherein:

The first sending module 506 is configured to, when the judging module 501 judges to be the first role, use the base station to select the stream for sending the X2 link request information from the streams defined by SCTP, and send the X2 link request information to other base stations;

The first receiving module 507 is configured to receive the stream used for the X2 link request information selected by other base stations from the streams defined by SCTP when the judging module 501 judges to be the second role;

The public stream determination module 502 is further configured to use the stream sent by the first sending module 506 as a public stream, or the stream received by the first receiving module 507 as a public stream.

Or, further, as shown in FIG. 7, the device may further include: a second sending module 508 and a second receiving module 509, wherein:

The second sending module 508 is configured to, after the second establishing module 504 establishes that the SCTP link is successfully established and before the acquiring module 505 acquires the logical role of the base station to which it belongs, or before the acquiring module 505 acquires the logical role of the base station to which it belongs After the logical role, use the base station to select the stream used to send the X2 link request information from the streams defined by SCTP, and send the X2 link request information to the base station;

The second receiving module 509 is configured to, after the second establishing module 504 successfully establishes the SCTP link and before the acquiring module 505 acquires the logical role of the base station to which it belongs, or before the acquiring module 505 acquires the logical role of the base station to which it belongs After the logical role, receive the flow for X2 link request information selected by other base stations from the flow defined by SCTP.

Based on the same inventive concept, the present invention provides a base station, including the above-mentioned apparatus provided by the embodiment of the present invention. The specific structure will not be repeated here.

The present invention provides a method, device and base station for establishing an X2 link between base stations. In the process of establishing an X2 link between a base station and other base stations, the logical role of the base station is used. When the base station is the first role, the base station The flow selected by itself for sending the X2 link request information is used as a common flow, and other base stations use this common flow to complete the establishment of the X2 link; otherwise, when the base station is in the second role, use the flow selected by other base stations for sending The flow of the X2 link request information is taken as a common flow, and other base stations use this common flow to complete the establishment of the X2 link. The first role and the second role are distinguished by different link negotiation levels. It can be seen that the present invention realizes the selection of the public flow when establishing the X2 link through the logic role of the base station itself, and solves the problem of establishing an X2 link between base stations. The problem of public flow selection conflict in the process of linking is eliminated, and the success rate of link establishment is also improved.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A method for establishing an X2 link between base stations, comprising: When the first base station establishes an X2 link with the second base station, the first base station judges whether its logical role is the first role or the second role, and the link negotiation level of the first role is higher than that of the second role link negotiation level; If it is judged to be the first role, the first base station uses the flow selected by itself for sending the X2 link request information as a public flow; If it is determined to be the second role, the first base station uses the stream selected by the second base station for sending the X2 link request information as a common stream; The first base station establishes an X2 link with the second base station by using the common flow. 2. The method according to claim 1, further comprising: before the first base station judges whether its logical role is the first role or the second role: The first base station establishes a Stream Control Transmission Protocol SCTP link with the second base station; The first base station acquires its own logical role. 3. The method according to claim 2, wherein if it is judged to be the first role, the first base station uses the flow selected by itself for sending the X2 link request information as a public flow, specifically including: The first base station determines that it is the first role, and the first base station selects a flow for sending the X2 link request information from the SCTP-defined flow to send the X2 link request information to the second base station, and selects as said public stream; If it is determined to be the second role, the first base station uses the stream selected by the second base station for sending the X2 link request information as a common stream, specifically including: The first base station determines that it is the second role, and the first base station receives the stream used for the X2 link request information selected by the second base station from the streams defined by SCTP, and uses the received stream as the public stream. 4. The method according to claim 2, wherein after the SCTP link is successfully established and before the first base station acquires its own logical role, or before the first base station acquires its own logical role After that, also include: The first base station selects a stream for sending X2 link request information from the streams defined by SCTP; The first base station uses the selected flow to send X2 link request information to the second base station, and receives the flow used for the X2 link request information selected by the second base station from the SCTP-defined flows. 5. The method according to any one of claims 1-4, wherein the first role is a server, and the second role is a client; or the first role is a client, and the The second role is the server. 6. A device for establishing an X2 link between base stations, characterized in that it comprises: A judgment module, configured to judge whether the logical role of the base station to which it belongs is the first role or the second role when the base station to which it belongs establishes an X2 link with other base stations, and the link negotiation level of the first role is higher than that of the link of the second role road negotiation level; The public flow determination module is used to use the flow selected by the base station for sending the X2 link request information as the public flow if the judging module judges it to be the first role; if the judging module judges it to be the second role, then use the other The stream selected by the base station for sending the X2 link request information is taken as a common stream; A first establishing module, configured to establish an X2 link with the other base station by using the common flow determined by the judging module. 7. The device for establishing an X2 link between base stations according to claim 6, further comprising: The second establishment module is used to establish a Stream Control Transmission Protocol SCTP link with the other base stations before the judging module judges whether the logical role of the base station belongs to the first role or the second role; The obtaining module is used to obtain the logical role of the base station to which it belongs. 8. The apparatus for establishing an X2 link between base stations according to claim 7, further comprising: a first sending module or a first receiving module; The first sending module is configured to use the base station to select a stream for sending X2 link request information from the streams defined by SCTP when the judging module judges to be the first role, and send the X2 link to the other base stations road request information; The first receiving module is configured to receive the stream used for X2 link request information selected by the other base stations from the streams defined by SCTP when the judging module judges to be the second role; The public flow determining module is further configured to use the flow sent by the first sending module as a public flow, or take the flow received by the first receiving module as a public flow. 9. The apparatus for establishing an X2 link between base stations according to claim 7, further comprising: a second sending module and a second receiving module; The second sending module is configured to: after the second establishing module successfully establishes the SCTP link and before the acquiring module acquires the logical role of the base station to which it belongs, or after the acquiring module acquires the logical role of the base station to which it belongs, using the base station to select a stream for sending the X2 link request information from the streams defined by SCTP, and send the X2 link request information to the other base stations; The second receiving module is configured to: after the second establishing module successfully establishes the SCTP link and before the acquiring module acquires the logical role of the base station to which it belongs, or after the acquiring module acquires the logical role of the base station to which it belongs, receiving the stream used for the X2 link request information selected by the other base station from the streams defined by the SCTP. 10. A base station, comprising the device according to any one of claims 6-9.

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