WO2011038551A1

WO2011038551A1 - Message processing method and apparatus thereof

Info

Publication number: WO2011038551A1
Application number: PCT/CN2009/074338
Authority: WO
Inventors: 张亮亮; 陈卓; 李亚娟; 常俊仁; 王燕; 彭炎
Original assignee: 华为技术有限公司
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2011-04-07

Abstract

The embodiments of the present invention provide a message processing method. The method includes: receiving an X2 message to obtain the information of the X2 message, and transmitting the information of the X2 message by using an S1 message; and/or receiving an S1 message to obtain the information of the S1 message, and transmitting the information of the S1 message by using an X2 message. Moreover, the embodiments of the present invention provide a message processing apparatus. Application of the embodiments of the present invention enables the flexible use of the X2 interface and the S1 interface, thus ensuring the successful delivery of the message content, and optimizing the signaling procedure.

Description

Message processing method, device

The present invention relates to the field of communications technologies, and in particular, to a message processing method and apparatus. Background technique

In 2006, ITU-R (Radiocommunication Sector of ITU) officially named B3G (BeyondThird Generation Intermobi communication system, also known as fourth-generation mobile communication) technology as IMT-Advanced (Advanced) International Mobile Communications) technology. IMT-Advanced technology needs to achieve higher data rates and greater system capacity. The target peak rates are: low-speed mobile, lGbps (gigabits per second) in hotspot coverage scenarios, 100Mbps (megabits) in high-speed mobile, wide-area coverage scenarios. Bits per second).

The current standardization organizations are conducting formal or informal research on IMT-Advanced, including the 3GPP (3rd Generation Partnership Project) standardization organization. The 3GPP's LTE (Long Term Evolution) technology, which is being standardized, already has some of the technical features of IMT-Advanced. The 3GPP is preparing to evolve LTE into LTE-A (LTE-Advanced, Advanced Long Term Evolution) technology.

On the one hand, the IMT-Advanced system proposes a very high system capacity requirement; on the other hand, a large bandwidth spectrum sufficient to support high capacity can only be found in the higher frequency band, and the path loss and penetration loss of such a high frequency band They are relatively large and it is difficult to achieve good coverage. In order to meet the capacity requirements of IMT-Advanced, LTE-A is currently researching Relay as a candidate for improving system capacity and coverage.

The so-called relay technology, taking a simple two-hop relay as an example, is to divide the wireless link between the base station and the user equipment into a wireless link between the base station and the relay station, between the relay station and the user equipment. The two links of the wireless link, the opportunity to replace a poor quality link with two better quality links for higher link capacity and better coverage.

In the LTE wireless network, the main interfaces involved are defined as follows:

Un interface: the interface between the relay and its serving base station;

Uu interface: an interface between a user equipment and its service relay;

S1 interface: an interface between the MME (Moblity Management Entity)/S-GW (Serving Gate Way) and the base station;

X2 interface: Interface between base stations.

In the LTE wireless network, the service of the UE (User Equipment) is mapped to the DRB (Data Radio Bearer) on the Uu interface, and the eNB (eNodeB, base station) can identify the DRB to which the data belongs and corresponding to the data. deal with. In the LTE-A relay network, relay stations, such as Type-1 relays, access the network through the base station. The relay station supports the LTE UE. In the view of the LTE UE, the relay station is functionally compatible with the LTE eNB.

The prior art provides an LTE-A relay protocol architecture. If the Un interface uses the S1 message, the base station uses the S1 message on the EPC (Evoled packet core network) side, and if the Un interface is used. X2 message, then the base station will use the X2 message on the EPC side.

In the following, in the process of user equipment handover, the relay uses the S1 message to initiate a handover request message to the base station as an example to illustrate the foregoing process.

After receiving the handover request message (S1-AP: HO required message) of the S1 interface, the base station may only modify the S1AP UE ID of the S1 message (the user equipment S1 application protocol identifier), and the other parts are not changed, thereby forwarding the S1 handover. The request message (S1AP: HO required message) is given to 匪E, and the corresponding S1 switching process is performed. Here S1-AP or S1AP stands for S1 Appl ication Protocol.

Or similarly, the eNB receives the RRC message carrying the content of the S1 handover request message, and after the base station parses the S1 message, the base station initiates a corresponding S1 handover procedure on the core network side. The same reason The X2 message, if the base station receives the RRC message carrying the content of the X2 handover request message, after the base station parses the X2 message, the corresponding X2 handover procedure is initiated on the core network side.

In the process of implementing the present invention, the inventor found that the prior art has at least the following disadvantages: The X2 interface and the S1 interface are inflexible, the message content cannot be successfully transmitted, and the signaling process is relatively complicated. For example, during the user equipment handover, when the relay station sends an X2 message to the source base station on the Un interface, the source base station sends the information to the target base station using the X2 message accordingly. If the X2 interface between the source base station and the target base station is not available at this time, the source base station can only reject the handover request of the relay station through the corresponding X2 message. If the relay station always initiates a handover request using an X2 message, and the X2 interface between the source base station and the target base station is always unavailable, the source base station will always refuse to switch. The relay station is also unclear that this handover failure is caused by the X2 interface being unavailable. Especially when there are multiple UEs under the relay station, scenes in which different UEs experience such "X2 HO (Handover) failure" may be repeated. On the Un interface, the relay station sends an S1 message to the base station. When the base station and the S1 interface on the core network side are unavailable, the problem also exists. Summary of the invention

The embodiment of the present invention provides a message processing method, which is used to implement flexible use of the X2 interface and the S1 interface, ensure smooth transmission of message content, and optimize signaling flow. The method includes:

Receiving the X2 message to obtain the information of the X2 message, and transmitting the information of the X2 message by using the S1 message;

and / or,

The S1 message is received to obtain the information of the S1 message, and the information of the S1 message is sent using the X2 message.

The embodiment of the present invention further provides a message processing method, which is used to implement flexible use of the X2 interface and the S1 interface, ensure smooth transmission of message content, and optimize signaling flow. The method includes:

Obtaining a message sent by the X2 message, and sending a first retransmission notification to indicate that the information is sent by using an S1 interface; and / or,

Obtaining a message sent by the SI message, and transmitting a second retransmission notification to indicate that the information is sent using the X2 interface.

The notification of whether the X2 interface between the neighboring site is available or not is sent by using the S1 interface when the X2 interface is unavailable;

and / or,

The notification of whether the S1 interface with the neighboring site is available is available. When the S1 interface is unavailable, the information is sent using the X2 interface.

The embodiment of the present invention further provides a message processing apparatus, which is used to implement flexible use of the X2 interface and the S1 interface, ensure smooth transmission of message content, and optimize signaling flow. The device includes:

a first receiving module, configured to receive an X2 message to obtain information of the X2 message;

a first processing module, configured to send, by using an S1 message, information of the X2 message;

And / or, the device includes:

a second receiving module, configured to receive an S1 message to obtain information of the S1 message;

And a second processing module, configured to send the information of the S1 message by using an X2 message.

a first obtaining module, configured to obtain information sent by using an X2 message;

a first processing module, configured to send a first retransmission notification, to indicate that the ^I self is sent by using an S1 interface;

And / or, the device includes:

a second obtaining module, configured to obtain information sent by the S1 message;

a second processing module, configured to send a second retransmission notification, to indicate that the sending is performed by using the Χ2 interface The embodiment of the present invention further provides a message processing device, which is used to implement flexible use of the X2 interface and the S1 interface, ensure smooth transmission of message content, and optimize signaling flow. The device includes:

a first receiving module, configured to receive a notification that the X2 interface between the neighboring site is available; and a first sending module, configured to send the information by using the S1 interface when the X2 interface is unavailable; and/or,

The second receiving module is configured to receive a notification that the S1 interface between the neighboring site is available. The second sending module is configured to send the information by using the X2 interface when the S1 interface is unavailable.

In the embodiment of the present invention, the X2 message is received to obtain the information of the X2 message, and the information of the X2 message is sent by using the S1 message; and/or, the S1 message is received to obtain the information of the S1 message, and the S1 message is sent by using the X2 message. The information enables flexible use of the X2 interface and the S1 interface, ensures smooth transmission of message content, and optimizes the signaling process;

In the embodiment of the present invention, the information sent by the X2 message is obtained, and the first retransmission notification is sent to indicate that the information is sent by using the S1 interface; and/or, the information sent by the S1 message is obtained, and the second retransmission is sent. The notification is used to send the information by using the X2 interface, so as to implement the flexible use of the X2 interface and the S1 interface, ensure the smooth transmission of the message content, and optimize the signaling flow. In the embodiment of the present invention, the X2 between the neighboring site is received. Whether the interface is available for notification, when the X2 interface is unavailable, the S1 interface is used to send information; and/or, the notification of whether the S1 interface is available with the neighboring site is available, and when the S1 interface is unavailable, the information is sent by using the X2 interface, thereby realizing The flexible use of the X2 interface and the S1 interface ensures smooth transmission of message content and optimizes the signaling process. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is some embodiments of the present invention, and those of ordinary skill in the art, Other drawings may also be obtained from these drawings without the inventive labor. In the drawing:

1 is a flowchart of another embodiment of a message processing method according to an embodiment of the present invention; FIG. 2 is a flowchart of another embodiment of a message processing method according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a message processing method according to an embodiment of the present invention; A specific implementation flow chart of the scenario;

4 is a flow chart of another specific implementation of a message processing method in a handover scenario according to an embodiment of the present invention;

FIG. 5 is a flowchart of still another specific implementation of a message processing method in a handover scenario according to an embodiment of the present invention; FIG.

6 is a flowchart of still another specific implementation of a message processing method in a handover scenario according to an embodiment of the present invention;

7 is a flowchart of a specific example of a message processing method when a handover target is a relay station under another base station that has an S1 interface connected to a serving base station of a relay station according to an embodiment of the present invention;

8 is a flowchart of a specific example of a message processing method when a handover target is a relay station under another base station that has an S1 interface connected to a serving base station of a relay station according to an embodiment of the present invention;

FIG. 9 is a flowchart of a specific example of a message processing method when a handover target is a relay station under the same serving base station according to an embodiment of the present disclosure;

FIG. 10 is a flowchart of another specific example of a message processing method when a handover target is a relay station under the same serving base station according to an embodiment of the present invention;

FIG. 11 is a flowchart of a specific example of a message processing method for sending a first retransmission notification according to an embodiment of the present invention;

FIG. 12 is a flowchart of a specific example of a message processing method for sending a second retransmission notification according to an embodiment of the present invention;

13A and FIG. 13B are flowcharts of processing of another message processing method according to an embodiment of the present invention; FIG. 14A and FIG. 14B are flowcharts of processing of another message processing method according to an embodiment of the present invention; 15 and FIG. 16 are schematic diagrams showing a specific implementation of a message processing method in a handover scenario according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a message processing apparatus according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of another message processing apparatus according to an embodiment of the present invention; FIG.

FIG. 19 is a schematic structural diagram of still another message processing apparatus according to an embodiment of the present invention; FIG.

FIG. 20 is a schematic structural diagram of still another message processing apparatus according to an embodiment of the present invention. detailed description

In order to make the objects, the technical solutions and the advantages of the embodiments of the present invention more clearly, the embodiments of the present invention will be described in detail below. The illustrative embodiments of the present invention and the description thereof are intended to be illustrative of the invention, and are not intended to limit the invention.

The message processing method in the embodiment of the present invention may include: receiving an X2 message to obtain information of an X2 message, transmitting information of the X2 message by using an S1 message; and/or receiving an S1 message to obtain information of an S1 message, using X2 The message sends the information of the S1 message, thereby implementing flexible use of the X2 interface and the S1 interface, ensuring smooth transmission of the message content, and optimizing the signaling process. In the embodiment of the present invention, the S1 message/X2 message is also S1 signaling/X2 signaling, and the information page in the S1 message/X2 message is content to be conveyed through the corresponding message.

As shown in FIG. 1 , in a specific implementation, the process of the foregoing message processing method may include: Step 101: Receive an X2 message;

Step 102: Obtain information of an X2 message.

Step 103: Send an information of the X2 message by using an S1 message.

It can be seen from the flow of FIG. 1 that in the above message processing method, the X2 message is received to obtain the information of the X2 message, and the information of the X2 message is sent by using the S1 message, so that the flexible use of the X2 interface and the S1 interface can be realized, and the smooth transmission of the message content is ensured. , optimize the signaling process. This embodiment is especially applicable to the case where the X2 interface between the network node and the neighboring site is unavailable, when a network node receives and sends After the party's X2 message, it is found that the X2 interface between it and the neighboring site is not available, and the corresponding content can be sent using the S1 message.

As shown in FIG. 2, in a specific implementation, the process of the foregoing message processing method may include: Step 201: Receive an S1 message;

Step 202: Obtain information about the S1 message.

Step 203: Send an information of the S1 message by using an X2 message.

It can be seen from the flow of FIG. 2 that, in the above message processing method, the S1 message is received to obtain the information of the S1 message, and the information of the S1 message is sent by using the X2 message, so that the flexible use of the X2 interface and the S1 interface can be realized, and the smooth transmission of the message content is ensured. , optimize the signaling process. This embodiment is especially applicable to the case where the S1 interface between the network node and the neighboring site is unavailable. When a network node receives the S1 message from the sender, it finds that the S1 interface between the node and the neighboring site is unavailable, and can use the X2 message to send. Corresponding content.

The processes shown in Figures 1 and 2 can be used alone or in combination.

In a specific implementation, the message processing method may be implemented by a device capable of realizing the function, for example, by a base station, a relay station, or a network station. For example, when implemented by the base station, the base station can have the function of changing the UEID of the message sent by the relay station in the prior art, and can also parse the message sent by the relay station to obtain the information of the message, instead of modifying the marking function. Thereby, the format of the message can be changed, and the information of the message is converted and carried to the message of another format.

In a specific implementation, the received X2 message may be carried in an RRC (Radio Resource Control) message, for example, the X2 message is included in the RRC message as a whole, and the receiver parses the RRC message. , you can get a complete X2 message directly; of course, the X2 message can also be carried in other messages. In addition, the received X2 message may also be an independent X2 message. The receiver receives a complete X2 message. The same is true for SI messages. The received S1 message may be carried in an RRC message. For example, the S1 message is included in the RRC message as a whole in the RRC message. After the receiver parses the RRC message, the complete S1 message can be directly obtained. Of course, the S1 message can also be carried in other messages. In addition, the received S1 message may also be an independent S1 message. The receiver receives a complete S1 message.

In a specific implementation, in the foregoing message processing method, receiving the X2 message to obtain the information of the X2 message may be implemented in multiple manners, for example, directly receiving the X2 message, parsing the received X2 message to obtain the information of the X2 message, and, for example, receiving The RRC message carrying the X2 message is further parsed by the RRC message carrying the X2 message, thereby obtaining the X2 message, and further parsing the obtained X2 message to obtain the information of the X2 message. Certainly, the information for receiving the S1 message to obtain the S1 message may also be implemented in multiple manners, for example, directly receiving the S1 message, parsing the received S1 message to obtain the information of the S1 message, and, for example, receiving the RRC message carrying the S1 message. Resolving the bearer S1 message

The RRC message, thereby obtaining the S1 message, and further parsing the obtained S1 message to obtain the S1 message.

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For example, if the above-mentioned message processing method is executed by the base station, the S1 message or the X2 message used by the Un interface may be a message that the relay station needs to receive the S1 message carrying the corresponding information after receiving the message sent by the user equipment. Or an X2 message to the core network; or a situation in which the relay station generates an S1 message or an X2 message due to its own cause, for example, in the case of a mobile relay, the mobile relay initiates a handover request to the base station for its own handover, in particular The original RRC message-measurement report message is carried, for example, using the S1 message /X2.

In summary, for the S1 message or the X2 message used by the Un interface, the S1 message or the X2 message sent by the relay station may be carried in other messages, such as an RRC message, sent to the base station, and the RRC message is parsed by the base station to obtain the RRC message bearer. An S1 message or an X2 message is transmitted at the base station and the core network. Of course, the S1 message or the X2 message sent by the relay station may also be an independent complete S1 message or an X2 message, and the performance is an S1 message or an X2 message. In an embodiment, the information of the X2 message sent by using the S1 message may be implemented in multiple manners, for example: the information parsed from the X2 message is carried in the S1 message and sent; of course, the information that is parsed from the X2 message is carried. There are also various implementations for sending to the S1 message, for example: the X2 message is included in the S1 message as a whole, and the SP is transmitted when the information parsed from the X2 message is sent to the S1 message, and the original X2 is sent. The message is not changed, and is directly packaged and sent in the S1 message; or, in the specific implementation, the X2 message may be modified to be sent to the S1 message, for example, to perform some format modification, or to convert the original X2. The information of the message is split and reassembled into the S1 message.

Similarly, the information used to send the S1 message by using the X2 message may also be implemented in multiple manners, for example: the information parsed from the S1 message is carried into the X2 message for transmission; of course, the information to be parsed from the S1 message is carried. There are also various implementations for sending to the X2 message, for example: the S1 message is included in the X2 message as a whole, and the SP, when the information parsed from the S1 message is carried into the X2 message, is sent. The S1 message is not changed, and is directly packaged and sent in the X2 message; or, in the specific implementation, the S1 message may be modified, and then sent to the X2 message for transmission, for example, some format modification, or the original The information of the S1 message is split and reassembled into the X2 message.

Optionally, in an embodiment, the information of the X2 message sent by using the S1 message may also have a precondition, which may be: The X2 interface is unavailable. SP, when the X2 interface is unavailable, uses the S1 message to send information about the X2 message.

Of course, the information used to transmit the X2 message using the S1 message in the specific implementation is not limited to the premise that the X2 interface is unavailable. The precondition can be preset as needed. For example, the precondition is preset as: The handover target is another station (such as a base station, a relay station, etc.) that has a direct or indirect S 1 interface with the serving base station of the relay station. Specifically, if the handover target is another base station having an S1 interface with the serving base station of the relay station, the S1 interface is an indirect interface, and the serving base station is through an intermediate network node (such as 匪6, base station, relay station, etc.) or multiple network nodes. Performing with the target node (such as another base station, a relay station under another base station, a network station or a node such as a relay station) SI connection. If the handover target is another relay station under the serving base station, the S1 interface may be a direct S1 interface. Whether the interface of the direct S1 or the indirect S1 interface, if the precondition is satisfied, the serving base station can obtain the information of the X2 message after receiving the X2 message, and send the information of the X2 message to the handover target by using the S1 message; The precondition is preset as follows: the handover target is a relay station under another base station that has an S1 interface with the serving base station of the relay station. If the precondition is satisfied, the serving base station can obtain the information of the X2 message after receiving the X2 message. The information of the X2 message is sent to the handover target by using the S1 message. In addition, the precondition may be omitted, that is, as long as the X2 message is received, the information of the X2 message is obtained, and the information of the X2 message is sent by using the S1 message.

In some cases, the relay station does not perform the judgment of whether certain preconditions are met, but sends a SI Handover Required message directly to its serving base station, and the serving base station performs a handover operation according to different handover targets, for example: if the handover target If the relay station is the same as the relay station, the serving base station sends the SI Handover Request to the target node. If the handover target is the serving base station, the serving base station can agree to the handover and send the SI Handover Commando directly to the relay station. The role of proxy).

Similarly, the information of the S1 message sent by using the X2 message may have a precondition, which may be: The S1 interface is unavailable. SP, when the S1 interface is unavailable, uses the X2 message to send the information of the S1 message. Of course, the information used to send the S1 message using the X2 message in the specific implementation is not limited to the premise that the S1 interface is not available. This precondition can be preset as needed, similar to the foregoing parsing X2 message, and will not be described here. In addition, the premise may be absent, that is, as long as the S1 message is received, the information of the S1 message is obtained, and the information of the S1 message is transmitted using the X2 message.

The following is an example to illustrate the specific implementation of the above message processing method in the actual application scenario. The application scenario in this example is as follows: After receiving the handover request sent by the relay station, the base station performs a corresponding handover process, that is, the X2 message or the S1 message is used to initiate the handover request. Of course, implementation is not limited to In this scenario, the scenario where the X2 interface and the S1 interface can be flexibly used according to the above message processing method can be used.

As shown in FIG. 3, the message processing method in this example may include:

Step 301: Receive a handover request sent by using an X2 message.

Step 302: Parse the handover request sent by using the X2 message to obtain the handover request.

Step 303: Send the handover request by using an S1 message.

By implementing the process shown in Figure 3, the X2 interface and the S1 interface can be flexibly used to send handover requests, ensuring smooth handover of handover requests in the network, and optimizing the signaling processing flow. Specifically, the relay station sends an X2-AP: HO Request (Handover Request) message to the base station, and the base station obtains the information of the message after receiving the message. For some reason (for example, the X2 interface is unavailable), the base station uses the S1-AP: HO Required message. The message information is sent to 匪E, and then the target base station is notified of the handover request through the S1-AP message of 匪E. The specific process can be as shown in Figure 4, including:

Step 401: The relay station sends a handover request to the source base station (Source eNB) by using an X2 message (X2-AP: HO Request);

Step 402: The source base station parses the information of the X2-AP: HO Request message, and sends the handover request (S1-AP: HO Required) message to the mobility management entity (匪E) by using the S1 message; Optional, for example, the X2 interface may be unavailable;

Step 403: 匪 E sends the handover request to the target base station (Target eNB) by using an S1 message (S1-AP: HO Request);

Step 404: When the target base station allows handover, the S1 message (S1-AP: HO Request ACK) is used to return the handover response to the MME.

Step 405: 匪E sends a handover command to the source base station by using an S1 message (S1-AP: HO Command); Step 406: The source base station parses out the information of the Sl-AP: HO Command message, and returns the parsed S1 message content to the relay station by using an X2 message (X2-AP: HO Request ACK).

It can be seen from the flow shown in FIG. 4 that, in the foregoing handover process, if the source base station receives the X2 message sent by the relay station, the information of the X2 message can be obtained, and the information of the X2 message is sent to the core network side by using the S1 message; Specifically, when the base station receives the X2 message-switch request message (X2-AP: HO Request) sent by the relay station, the information of the X2 handover request message may be parsed, and the S 1 handover procedure is performed with the relevant site of the core network. Specifically, the information of the obtained X2 message is carried into the S1 message (Sl-AP: HO Required) by using the S1 message, and some format modification may be performed, or the information of the original X2 message may be split and then re- The assembly into the S1 message, in general, makes it conform to the content and format of the S1 handover request message. Then, the S1 message (S l-AP: H0 Required) is sent to the core network side, such as MN E, and then sent to the target base station through 匪E, and then the S1 handover procedure is performed. Similarly, if the source base station receives the S1 message sent by the core network side, the information of the S1 message can be obtained, and the information of the S1 message is sent to the relay station by using the X2 message. Specifically, the base station uses the X2 message to carry the obtained information of the S1 message (S1-AP: HO Command) to the X2 message (X2-AP: HO Request ACK), that is, the handover response, and may perform some format modification, or The information of the original S1 message is split and reassembled into the S1 message, so that the content and format of the S1 handover request message are met. The X2 message (X2-AP: HO Request ACK), that is, the handover response, is then sent to the relay station. SP, the base station can parse the X2 message sent by the relay (source node), and carry the information of the received information to the corresponding S1 message to forward the target node according to the situation of the S1 or X2 interface or for some reason, the target The node may be, for example, 匪6, or another network station or node such as another base station, another relay station, a relay station under another base station, or a gateway; and the base station receives the S1 message on the core network side, and can receive information of the received information. The bearer to the corresponding X2 message is forwarded to the relay station, thereby completing the signaling process originally required to use the X2 message. During the specific implementation, other types of messages may be similarly processed, and are not limited to the foregoing handover request and handover response. As shown in FIG. 5, the message processing method in this example may include:

Step 501: Receive a handover request sent by using an S1 message.

Step 502: Parse the handover request sent by using the S1 message, and obtain the handover request.

Step 503: The switching request sent by using an X2 message.

By implementing the process shown in Figure 5, the X2 interface and the S1 interface can be flexibly used to send handover requests, ensuring smooth handover of handover requests in the network, and optimizing the signaling processing flow. Specifically, when the relay station initiates the S1-AP: HO Required message to the base station, the base station obtains the information of the message after receiving the message, optionally, for some reason (for example, the S1 interface is unavailable), the base station uses the X2-AP: HO Request The message sends the information of the message to the target base station. The specific process can be as shown in Figure 6, including:

Step 601: The relay station sends a handover request to the source base station (Source eNB) using an S1 message (Sl-AP: HO Required);

Step 602: The source base station parses the information of the S1-AP: HO Required message, and sends the handover request to the target base station (X2-AP: HO Request) by using the X2 message; the preconditions for performing the step are optional, for example, The S1 interface is unavailable.

Step 603: When the target base station allows the handover, use the X2 message (X2-AP: H0 Command) to return the handover response to the source base station;

Step 604: The source base station parses the information of the X2-AP: HO Command message, and returns the information of the parsed X2 message to the relay station by using an S1 message (S1-AP: HO Request ACK).

The following is a few examples to illustrate the specific implementation of the above message processing method in the actual application scenario.

As shown in FIG. 7, in one embodiment, the handover target is a relay station under another base station that has an S1 interface with the serving base station of the relay station. The message processing method in this example may include: Step 701: The source relay station sends a handover request to the source base station (Source eNB) using an SI message (S1-AP: HO Required);

Step 702: The source base station parses the information of the S1-AP: HO Required message, and sends the handover request to the target base station (X2-AP: HO Request) by using the X2 message; the preconditions for performing the step may be optional, for example, The S1 interface is unavailable.

Step 703: The target base station parses the information of the X2-AP: HO Request message, and sends the handover request to the relay station under the target base station by using the S1 message (S1-AP: HO Required); the preconditions for performing the steps are optional. For example, the X2 interface can be unavailable;

Step 704: When the relay station under the target base station allows handover, use an S1 message (S1-AP: HO Request ACK) to return a handover response to the target base station.

Step 705: The target base station parses out the information of the Sl-AP: HO Request ACK message, and sends a handover command to the source base station by using the X2 message (X2-AP: HO Command);

Step 706: The source base station parses the information of the X2-AP: HO Command message, and returns the information of the parsed X2 message to the relay station by using an S1 message (S1-AP: HO Request ACK).

As shown in FIG. 8, in one embodiment, the handover target is a relay station under another base station that has an S1 interface connection with the serving base station of the relay station, and the message processing method in this example may include:

Step 801: The relay station sends a handover request to the source base station (Source eNB) by using an X2 message (X2-AP: HO Request);

Step 802: The source base station parses the information of the X2-AP: HO Request message, and sends the handover request to the mobility management entity (匪E) by using the S1 message. (Ser-AP: HO Required); Alternatively, for example, the X2 interface may not be available;

Step 803: 匪E sends the handover request to the target base station (Target eNB) by using an S1 message (S1-AP: HO Required); Step 804: The target base station parses out the information of the Sl-AP: HO Required message, and sends the handover request to the relay station (X2-AP: HO Request) under the target base station by using the X2 message; the preconditions for performing the steps are optional. For example, the S1 interface may be unavailable;

Step 805: When the relay station under the target base station allows handover, the X2 message (X2-AP: HO Request ACK) is used to return the handover response to the target base station.

Step 806: The target base station parses the information of the X2-AP: HO Request ACK message, and returns an handover response to the MME by using an S1 message (Sla-AP: HO Request ACK).

Step 807: 匪 E sends a handover command to the source base station by using an S1 message (S1-AP: HO Command);

Step 808: The source base station parses out the information of the Sl-AP: HO Command message, and returns the information of the parsed S1 message to the relay station by using an X2 message (X2-AP: HO Request ACK).

As shown in FIG. 9, in one embodiment, the handover target is a relay station under the same serving base station, and the message processing method in this example may include:

Step 901: The source relay station sends a handover request to the base station (eNB) using an X2 message (X2-AP: HO Request);

Step 902: The base station parses the information of the X2-AP: HO Request message, and sends the handover request to the target relay station by using the S1 message (S1-AP: HO Required); the preconditions for performing the step are optional, for example, may be X2 The interface is not available;

Step 903: When the target relay station allows handover, use an S1 message (S1-AP: H0 Command) to return a handover response to the base station;

Step 904: The base station parses the information of the Sl-AP: HO Request ACK message, and returns the information of the parsed S1 message to the source relay station by using an X2 message (X2-AP: HO Request ACK).

As shown in FIG. 10, in one embodiment, the handover target is a relay station under the same serving base station, and the message processing method in this example may include: Step 1001: The source relay station sends a handover request to the base station (eNB) using an SI message (S1-AP: HO Required);

Step 1002: The base station parses out the information of the S1-AP: HO Required message, and sends the handover request to the target relay station (X2-AP: HO Request) by using the X2 message; the preconditions for performing the step are optional, for example, it may be S1. The interface is not available;

Step 1003: When the target relay station allows handover, use an X2 message (X2-AP: H0 Command) to return a handover response to the base station;

Step 1004: The base station parses the information of the X2-AP: HO Request ACK message, and returns the information of the parsed X2 message to the source relay station by using an S1 message (S1-AP: HO Request ACK).

The present invention further provides a message processing method, the method may include: obtaining a message sent by an X2 message, sending a first retransmission notification to indicate that the information is sent by using an S1 interface; and/or obtaining a pass S1 The information sent by the message is sent to the second retransmission notification to indicate that the information is sent by using the X2 interface, thereby implementing flexible use of the X2 interface and the S1 interface, ensuring smooth transmission of the message content, and optimizing the signaling process.

In a specific implementation, the message processing method may be implemented by a device capable of realizing the function, for example, by a device such as a base station or a relay station. When implemented by the base station, there is information exchange between the base station and the relay station, and the base station indicates to the relay station that the relay station wishes to resend the message content using the designated interface.

In a specific implementation, in the foregoing message processing method, the information sent by using the S1 interface indicated by the first retransmission notification may be in multiple manners, for example, the information of the X2 message may be sent by using the S1 interface. Specifically, the information may be: The message is retransmitted in the S1 message; that is, the information of the retransmitted message is unchanged, but the information of the message needs to be carried to another type of message and retransmitted. The other type of message is S1 transmitted through the S1 interface. The message may also be: The information of the resent message has been changed, for example, the information of the original X2 message is extracted, converted, etc., and some new message information is formed, which is adapted to be sent in the S1 message. For example, as shown in FIG. 11, the message processing method in this example may include: Step 1101: A receiver receives an X2-AP (such as a HO Request) sent by a sender; Step 1102: Receiver sends the sender to the sender The first retransmission notification indicates that the message is sent using the S1 interface;

Step 1103: The receiver receives the Sl-AP (HO Required) sent by the sender.

Similarly, the second retransmission notification indicates that the information may be sent by using the X2 interface. For example, the information of the S1 message may be sent by using the X2 interface. Specifically, the S1 message may be carried to the X2 message. Resending in the middle; that is, the information of the resent message is unchanged, but the information of the message needs to be carried to another type of message to be resent, and the other type of message is the X2 message transmitted through the X2 interface; Yes: The information of the resent message has been changed. For example, the information of the original S1 message is extracted, converted, etc., and some new message information is formed, which is adapted to be sent in the X2 message.

For example, as shown in Figure 12, the message processing method in this example includes:

Step 1201: The receiving party receives the S1-AP (such as HO Request) sent by the sender; Step 1202: The sending direction sends a second resending notification to the sending party to indicate that the sending is performed by using the X2 interface.

,

Step 1203: The receiver receives the Χ2-ΑΡ (HO Required) sent by the sender.

In an embodiment, the first retransmission notification is sent, and the first retransmission notification indicates that the information is sent by using the S1 interface. The precondition may be: the X2 interface is unavailable, for example, the base station and the core network side. The X2 interface is not available. When the information sent by the X2 message is obtained, the first retransmission notification may also be used to indicate that the X2 interface is unavailable; of course, the specific retransmission notification is not limited to being unavailable on the X2 interface. Under the preconditions. The precondition can be preset as needed. For example, the precondition is preset as: The handover target is another station (such as a base station, a relay station, etc.) that has a direct or indirect S1 interface with the serving base station of the relay station. Specifically, if the handover target is another base station having an S1 interface with the serving base station of the relay station, the S1 interface is an indirect interface, and the serving base station passes through an intermediate network node (such as an MME, a base station, and a relay station). Or) or multiple network nodes to make an S1 connection with the target node (such as another base station, a relay station under another base station, a network station or a node such as a relay station). If the handover target is another relay station under the serving base station, the S1 interface may be a direct S1 interface. If the S1 interface is the direct S1 interface or the indirect S1 interface, if the precondition is met, the serving base station may send the first retransmission notification after the X2 message is received, indicating that the information is sent by using the S1 interface; for example, prepending the precondition The handover target is a relay station under another base station that has an S1 interface with the serving base station of the relay station. If the precondition is satisfied, the serving base station may send a first retransmission notification after receiving the X2 message, indicating that the S1 interface is used. In addition, the premise may be omitted, that is, as long as the X2 message is obtained, the first retransmission notification is sent, and the information is sent using the S1 interface.

Similarly, the second retransmission notification is sent, and the second retransmission notification indicates that the information is sent by using the X2 interface. The precondition may be: The S1 interface is unavailable, and the obtained S1 message is sent. The second retransmission notification may also be used to indicate that the S1 interface is unavailable. Of course, the second retransmission notification is not limited to the premise that the S1 interface is unavailable. The precondition can be preset as needed, and is similar to the foregoing sending the first retransmission notification, and details are not described herein again. In addition, there may be no precondition that the second retransmission notification is sent as long as the S1 message is obtained, and the information is transmitted using the X2 interface.

In an embodiment, the first retransmission notification is sent, and the first retransmission notification indicates that the S1 interface is used to send information. The first retransmission notification may be carried in a specific bit of an existing message. Or the first retransmission notification may be carried in a custom message. For example, it may be implemented as: sending a handover rejection message, where the handover rejection message is set with a specific value, and the specific value indicates that the S1 interface is used. Sending information; SP, with a specific value in the switch reject message, indicating that the relay station uses the S1 interface to send information. Of course, the reason for the rejection is that the X2 interface is unavailable:

X2-AP : HANDOVER PREPARATION FAILURE message with an appropriate cause value In another example, the method may be implemented as: sending a specific message indicating that the information is sent by using the S1 interface (such as information including the X2 message). ' For example, the specific message may be S1X2 - Reject message, indicating that the relay station is recommended to use the SI interface. Sending the information, of course, can also indicate that the reason for the rejection is that the X2 interface is unavailable (for example, the base station and the core network side X2 interface are not available).

Similarly, the second retransmission notification is sent, and the second retransmission notification indicates that the information is sent by using the X2 interface. For example, the method may be implemented as: sending a handover rejection message, where the handover rejection message is set with a specific The value, the specific value indicates that the information is sent using the X2 interface; and can be implemented as: sending a specific message indicating that the information is sent using the X2 interface.

As shown in FIG. 13A, an embodiment of the present invention further provides a message processing method, where the method may include:

Step 1301a, sending a notification that the X2 interface between the neighboring site is available, to indicate that the information is sent by using the S1 interface when the X2 interface is unavailable;

Step 1302a: Receive information sent by using the SI interface.

As shown in FIG. 13B, an embodiment of the present invention further provides a message processing method, where the method may include:

Step 1301b, sending a notification that the S1 interface between the neighboring site is available, to indicate that the information is sent by using the X2 interface when the S1 interface is unavailable;

Step 1302b: Receive information sent by using the X2 interface.

It can be seen from the flow shown in FIG. 13A and FIG. 13B that, in the embodiment of the present invention, a notification is sent whether the X2 interface between the neighboring site is available, to indicate that the information is sent by using the S1 interface when the X2 interface is unavailable; Or, the notification of whether the S1 interface between the neighboring site is available is used to indicate that the S1 interface is unavailable, and the information is sent by using the X2 interface, so that the flexible use of the X2 interface and the S1 interface can be implemented, and the message content is smoothly transmitted and optimized. Signaling process. In short, the X2 interface of the base station and the neighboring site can be notified in advance, and the X2 interface of the receiving node (such as the relay station) is not available to notify the receiving node (such as the relay station) that the X2 interface is unavailable, and the message is duplicated. In a specific implementation, the message processing method may be implemented by a device capable of realizing the function, for example, by a device such as a base station or a relay station. For example, when the X2 interface is established between the relay station and the base station, the base station and the relay station exchange respective supported interface information, for example, the base station tells the relay station whether it supports the X2 interface of which neighboring sites or the X2 interfaces of the adjacent stations. In this way, the relay station will not initiate X2 H0, but directly initiate SI HO T, avoiding the failure processing and saving the H0 delay.

The base station tells the relay station that it supports the X2 interface of which neighboring sites have X2 interfaces or does not support which neighboring sites. There are various specific implementation methods, for example, it can be:

1. The base station maintains a list of neighbor sites (or cells), which includes information about neighbors (or cells), and information about the availability of the S1 interface and/or the X2 interface of the base station and the neighbor site. The interface information may be an indication that the S1 interface and/or the X2 interface of the base station and the neighboring site are available, or may be an indication that the S1 interface and/or the X2 interface of the base station and the neighboring site are unavailable.

Second, the base station maintains a neighbor relation table. In order to enable the network to be automatically configured and automatically optimized, the LTE system puts forward requirements for the operation and maintenance of the network, and thus proposes a Self-Organizing Network (SON). In SON, it is also very necessary to establish a neighbor relationship automatically. The neighbor relationship may be described by a neighbor relation table. Specifically, for example, the local base station (or local cell) indication information may be included, and the target base station (or target cell) ) Mark information, X2 interface information, etc., switch information, and so on. The base station may notify some or all of the information in the neighbor relationship list to the relay station.

The above list only two possible implementation methods, but it is not limited to these two methods.

The base station tells the relay station whether it supports the neighboring sites with X2 interfaces or X2 interfaces of which neighboring sites, which may be periodically notified or non-periodically notified. The S1 and/or X2 interface information of the foregoing base station and other neighboring sites (such as neighboring base stations) may be obtained and interacted in the process of establishing the interface between the base station and other sites S1 and/or X2, and may also be implemented in various other manners. Obtained, not limited here.

Similarly, the information of the S1 interface can also be notified to the RN through this list.

For example, when the S1 interface is established between the base station and other stations (such as 匪6, gateway, base station, relay station, etc.), the base station can exchange interface information between itself and other sites (such as S1 interface and/or X2 interface, or Other interface information) Tell the relay station, taking the S1 interface as an example, the base station informs the relay station which stations (such as which neighbor base stations) have an S1 interface (or support the base station and the S1 interface of the station) or which neighboring base stations do not have an S1 interface. (Or the base station and the S1 interface of the station are not supported), so that the relay station can directly initiate the X2 H0 by not transmitting the SI H0 through the information notified by the base station, thereby avoiding the failure processing and saving the H0 delay.

About the relay station to get the interface information:

In the specific implementation, the relay station can obtain:

a) information about the base station and the neighbor station (such as the neighbor base station, another relay station under the serving base station, the relay station under the neighbor base station) or the interface (such as S1 and / or X2 interface) of the site corresponding to the neighbor cell;

In particular, during the terminal handover process, when the relay station exchanges information with multiple candidate target sites (such as the target base station or the target relay station) of the terminal, only one S1/X2 interface is used in the Un port, and then the S1/X2 interface is adopted. The interface interacts with multiple candidate target sites. At this time, the base station relays or relays information to the plurality of candidate target stations for communication. At this time, the base station has a corresponding S1 interface or X2 interface with each candidate target site.

b) or / and information about the interface between the relay station and the neighboring station.

In particular: the relay station has S1 and X2 interfaces with its own serving base station, and the relay station and other neighbor base stations also have an S1 interface and/or an X2 interface. Then there will be multiple S1 interfaces and/or multiple X2 interfaces on the Un interface (the number is greater than or equal to 1). Such multiple S1 connections For the above two situations, specifically, when the neighbor station is a relay station under the neighbor base station, the relationship information of the target relay station and its serving base station needs to be notified to the relay station; or

For the above two cases, specifically, the relationship information of the neighboring station, such as the neighboring base station and its subordinate relay station, is notified to the relay station.

How the relay station recognizes that an S1 message or an X2 message is to be initiated:

Taking the handover as an example: In another embodiment, during the handover process (such as handover of a terminal of a relay, or handover of a mobile relay), the relay station initiates an X2 message to perform handover by default, and receives the first weight sent by the base station. When the notification is sent, the S 1 message is initiated to switch. Alternatively, the relay station initiates the S1 message to perform handover by default, and when receiving the second retransmission notification sent by the base station, the S1 message is further initiated for switching.

The relay station decides whether to initiate the S1 message to switch or initiate the X2 message to switch according to the interface information about the base station and the neighboring station, or the interface information of the relay station and the neighboring station.

Specifically, taking the X2 interface as an example, the relay station learns that the available information of the interface of the base station and the candidate target station (such as the neighbor base station, the relay station under the neighbor base station, or the neighbor relay station, etc.) is obtained, and the relay station pairs the candidate target station. Initiate an X2 message and switch.

How the relay station maintains the interface information:

Optionally, the relay station will maintain information such as an interface (such as an S1 and/or X2 interface) between the base station and a neighboring station (such as a neighbor base station, a relay station under the neighbor base station, or a relay station under the same serving base station, etc.). The relay station receives and maintains this information irregularly or periodically.

a) may be that the relay station actively initiates a request, requires the base station or the neighbor station to provide relevant information, or obtains the information through the base station;

b) may also be provided by the base station or neighboring sites; c) the above two situations, specifically, for example, during the establishment of the S1 and/or X2 interface between the relay station and the base station, or during the process of establishing the S1 and/or X2 interface between the relay station and the neighboring station through the base station;

d) The acquisition of this information can also be periodic.

In a specific implementation, the foregoing message processing method may further include: sending load indication information of the neighboring site, to indicate that the target site handover selection is performed according to the load indication information. For example, the base station informs the relay station of the load indication information of the neighbor station, so that the relay station selects the target station more reasonably. In short, let the base station inform the relay station of the load information, so that the relay station can select a better target eNB and facilitate the corresponding flow control.

As shown in FIG. 14A, an embodiment of the present invention further provides a message processing method, which may include:

Step 1401a. Receive a notification that an X2 interface between the neighboring site is available.

Step 1402a: When the X2 interface is unavailable, the information is sent by using the S1 interface.

As shown in FIG. 14B, an embodiment of the present invention further provides a message processing method, where the method may include:

Step 1401b: Receive a notification that an S1 interface with a neighboring site is available;

Step 1402b. When the SI interface is unavailable, use the X2 interface to send information.

The flow shown in Figures 14A and 14B can be implemented separately or in combination.

It can be seen from the flow shown in FIG. 14A and FIG. 14B that, in the embodiment of the present invention, the notification of whether the X2 interface between the neighboring site is available is used, and when the X2 interface is unavailable, the information is sent by using the S1 interface; and/or, receiving If the S1 interface is available, the S1 interface can be used to send information. The X2 interface and the S1 interface can be used flexibly to ensure the smooth transmission of message content and optimize the signaling process.

In a specific implementation, the message processing method may be implemented by a device capable of realizing the function, for example, by a device such as a base station or a relay station. For example, when an X2 interface is established between a relay station and a base station, the base station and the relay station exchange respective supported interface information, for example, the base station tells the relay station itself Supporting which neighboring sites have X2 interfaces or which X2 interfaces of adjacent stations are not supported, so that the relay station does not initiate X2 H0, but directly initiates SI HO T, avoiding failure processing and saving H0 delay.

Taking the X2 interface as an example, the base station informs the relay station of which stations (such as which neighbor base stations) have an X2 interface (or supports the base station and the X2 interface of the station) or with which neighboring base stations do not have an X2 interface (or does not support the base station and The site's X2 interface), so that the relay station can pass the information notified by the base station, will not initiate X2 H0, but directly initiate SI H0, avoiding the failure processing and saving the H0 delay.

In a specific implementation, when the sent information is information related to the handover, the message processing method may further include: acquiring load indication information of the neighboring station; and performing target station handover selection according to the load indication information. For example, the relay station receives the load indication information of the neighbor station sent by the base station, and according to the load indication information, the relay station can select the target station more reasonably, and facilitate the corresponding flow control.

In a specific implementation, the notification of whether the X2 interface between the receiving site and the neighboring site is available may include: receiving a notification that the X2 interface between the serving site and the neighboring site is available, or receiving an X2 interface between the relaying site and the neighboring site. announcement of;

The notification of whether the S1 interface between the neighboring site is available or not may include: a notification of whether the S1 interface between the serving site and the neighboring site is available, or a notification of whether the S1 interface between the relay site and the neighboring site is available.

The notification of whether the received X2/S1 interface with the neighboring site is available may include a neighbor relationship list, where the neighbor relationship list is used to indicate X2/S1 interface information with the neighboring site.

The embodiment of the present invention is equally applicable to data forwarding during handover. For example, in the Un interface, during the data forwarding process, the relay station performs the data forwarding process through the X2 interface, but on the base station and the core network side, the base station can use the interface of the corresponding network element (such as the target base station) on the core network side, or use The X2 interface performs the data forwarding process, or uses the S1 interface to perform the data forwarding process instead of using the X2 interface for data forwarding. In particular, The relay forwards data through the X2 interface, and the base station can communicate with the target base station through the 匪E using the S1 interface to perform a data forwarding process.

In the prior art, the base station has only one S1 interface with one 匪 E, and the base station has only one X2 interface with another base station. Under the relay network, there is only one S1 interface and X2 connection between the relay station and the base station.

The embodiment of the present invention is applicable to the above situation. In particular, in the terminal handover process, when the relay station exchanges information with multiple candidate target sites (such as a target base station or a target relay station) of the terminal, only one S1/ is used in the Un port. The X2 interface then interacts with multiple candidate target sites through the S1/X2 interface. At this time, the base station relays or relays the relay information to the plurality of candidate target stations for communication. At this time, the base station has a corresponding S1 interface or X2 interface with each candidate target site.

Another possible scenario is: The relay station has S1 and X2 interfaces with its own serving base station, and the other relay station and other neighbor base stations also have S1 interface and/or X2 interface. Then there will be multiple S1 interfaces and/or multiple X2 interfaces on the Un interface (the number is greater than or equal to 1). Such multiple S1 interfaces, multiple X2 interfaces, are used for serving base stations that pass through the relay station, and may actually be referred to as logical interfaces rather than physical interfaces. Embodiments of the invention are equally applicable to the above.

The following describes a specific example of the message processing method. As shown in FIG. 15, the processing flow may include:

Step 1501: A user equipment (UE) sends a measurement report message (Measurement report) to a relay station (RN);

Step 1502: After receiving the measurement report of the UE, the relay station determines, according to the measurement report and the radio resource management information, that a handover request needs to be initiated; the relay station sends a handover request to the source base station (Source eNB) by using an X2 message (X2-AP: HO Request) ;

Step 1503: The source base station parses the information of the X2-AP: HO Request message, and sends an SI handover request message (S1-AP: HO Required) to the mobility management entity (匪E) using the SI message. Prerequisites for executing the step Optional, for example, the X2 interface may be unavailable; Step 1504, 匪E sends the handover request to the target base station (Target eNB) by using an SI message (S1-AP: HO Request);

Step 1505: When the target base station allows the handover, the S1 message (S1-AP: H0 Request ACK) is used to return the handover response to the MME.

Step 1506: 匪 E sends a handover command to the source base station by using an S1 message (Sl-AP: HO Command);

Step 1507: The source base station parses out the information of the Sl-AP: HO Command message, and returns the information of the parsed S1 message to the relay station by using an X2 message (X2-AP: HO Request ACK).

Step 1508: The relay station sends a handover command-RRC link reconfiguration message to the user equipment. (RRCConn. Reconf.)

Step 1509: The relay station sends an X2 message to the source base station by using an X2 message sending sequence number status transfer message (X2-AP: SN status transfer);

Step 1510: The source base station parses the information of the X2-AP: SN status transfer message, and sends a base station status transfer message (S1-AP: eNB status transfer) to the mobility management entity by using the S1 message. For example, the X2 interface may be unavailable; Step 1511: The MME sends an 匪E status transmission message to the target base station by using an S1 message (S1-AP: MME status transfer);

Steps 1512a-c, the relay station uses the X2 interface data to the source base station; the source base station uses the S1 interface to transmit data to the gateway; the gateway uses the S1 interface to transmit data to the target base station; and another possible implementation is that the relay station directly uses the X2 interface to data Transfer to the target base station (Data forwarding);

Step 1513: The UE performs a peer-to-peer process and synchronizes to the target base station. Step 1514: The UE successfully accesses the target base station, and sends an RRC Link reconfiguration complete message to the target base station to confirm the terminal. The switch is completed. Step 1515: The target base station sends a handover notification (S1-AP: Handover Notify) to the 匪E using the SI message;

Step 1516: The target base station sends a path selection request (S1-AP: Path switch request) to the 匪 E by using an S1 message;

Step 1517: The MME sends a User Plane Update Request message (User plane update REQ) to the gateway (GW); and notify the service gateway that the user plane connection needs to be switched from the source base station to the target base station;

Step 1518: The user plane switches the downlink path to the target side, and the GW returns the user plane to the user plane §? User plane update RSP;

Step 1519, 匪 E sends a path selection response (S1-AP: Path switch request ACK) to the target base station by using an SI message;

Step 1520: 匪E sends a user equipment context release command (Sla-AP: UE context Release Command) to the source base station by using an SI message; and is used to notify the user equipment terminal that the source service site handover is completed, and may be released related to the user equipment terminal. Resources and information;

Step 1521: The source base station parses out the content of the Sl-AP: UE context Release Command, and sends a user equipment context release command to the relay station (X2-AP: UE context Release Command) by using an X2 message;

Step 1522: Release the resources and information related to the terminal at the relay station; the source base station uses the S1 message to feed back the user equipment context release completion (Sl-AP: UE context Release Complete).

In this example, the information of the obtained X2 message is carried in the SI message, for example, in the LTE handover process, the base station and the target base station complete the handover information interaction and complete the handover process through the X2 interface, and specifically use the X2 message to send the Handover Request message and Handover Request ACK message. The base station and the target base station complete the handover information interaction and complete the handover procedure through the SI interface, and through the 匪E, specifically using the S1 message Handover Requried, Handover Request, Handover Request ACK, Handover command message.

Therefore, the handover process can be completed through both SI and X2 messages, wherein the message contains the information interaction required for the handover, and the difference is that the indications used by S1 and X2 are different, because the base station does not directly communicate with the target base station. The MME communicates with the target base station. Therefore, if the S1 message uses the SI AP ID (including the MME UE SIAP ID, the eNB UE SIAP ID), X2 uses an X2AP ID (including the old eNB X2AP ID, New eNB X2AP ID).

In addition, since the base station parses the information of each message sent by the RN, the base station can obtain the information of each X2 message. Therefore, a lot of additional information is provided for sending an X2 message by using an S1 message. For example, the base station may configure a SIAP ID for the corresponding S1 message (including an 匪E UE SIAP ID, an eNB UE SIAP ID, and the IDs may be configured by the base station, It can be 匪E configured, or negotiated between the base station and the MME). The Direct forwarding path availability base station is also available at its discretion.

Although the names of each item in the X2 and S1 messages are not necessarily the same, the information can always be obtained from the specific content of the X2 message item, and this information can be corresponding to the S1 message. For example, the target ID in the S1 message HO required message corresponds to the target cell ID in the X2 message.

The following is a specific example to illustrate the foregoing message processing method. As shown in FIG. 16, the processing flow may include:

Step 1601: A user equipment (UE) sends a measurement report (Measurement report) to a relay station (RN);

Step 1602: After receiving the measurement report of the UE, the relay station determines, according to the measurement report and the radio resource management information, that a handover request needs to be initiated; the relay station sends a handover request to the source base station (Source eNB) by using the S1 message (SI-AP: HO Required) ; Step 1603: The source base station parses out the information of the Sl-AP: HO Required message, and sends the handover request to the target base station (X2-AP: HO Request) by using the X2 message; the preconditions for performing the step are optional, for example, The S1 interface is unavailable.

Step 1604: When the target base station allows handover, the X2 message (X2-AP: H0 Command) is used to send a handover command to the source base station.

Step 1605: The source base station parses the information of the X2-AP: HO Command message, and returns the information of the parsed X2 message to the relay station by using an S1 message (S1-AP: HO Request ACK).

Step 1606: The relay station sends a handover command to the user equipment - RRC Link Reconfiguration (RRCConn. Reconf.);

Step 1607: The relay station sends a sequence number status message to the source base station (S1-AP: SN status transfer) by using an S1 message;

Step 1608: The source base station parses out the information of the S1-AP: SN status transfer message, and sends a base station status transfer message (X2-AP: eNB status transfer) to the target base station by using an X2 message; For example, the S1 interface may be unavailable;

Step 1609a_b, the relay station uses the S1 interface to transmit data to the source base station; the source base station transmits data to the target base station (Data forwarding) using the X2 interface. ' There is also a possibility that the relay station transmits data to the source base station using the S1 interface, and the source base station Using the S1 interface to transmit data to the gateway, the gateway then uses the S1 interface to transmit data to the target base station;

Step 1610: The UE performs a peer-to-peer process and synchronizes to the target base station. Step 1611: The UE successfully accesses the target base station, and sends an RRC Link reconfiguration complete message to the target base station to confirm the terminal. The switch is completed.

Step 1612: The target base station and the gateway (GW) perform a path change process, so that the data of the terminal gateway is sent to the target base station instead of the source serving base station; Step 1613: The target base station sends a user equipment context release command (X2-AP: UE context Release Command) to the source base station by using the X2 message. The source service station handover for notifying the user equipment terminal is completed, and the user equipment terminal may be released. Resources and information;

Step 1614: The source base station parses the information of the X2-AP: UE context Release Command, and sends a user equipment context release command to the relay station (S1-AP: UE context Release Command) by using the S1 message;

Step 1615: The relay station releases the resources and information related to the user equipment terminal, and feeds back the user equipment context release complete (Sl-AP: UE context Release Complete) to the source base station.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the program is executed. All or part of the steps of the foregoing embodiment may be included. The storage medium may include: ROM, RAM, magnetic disk, optical disk, and the like.

A message processing apparatus is also provided in the embodiment of the present invention, as described in the following embodiments. Since the principle of solving the problem in these devices and systems is similar to the message processing method, the implementation of these devices and systems can be referred to the implementation of the method, and the repeated description will not be repeated.

As shown in FIG. 17, a message processing apparatus is provided in the embodiment of the present invention, and the apparatus may include:

The first receiving module 1701a is configured to receive the X2 message to obtain the information of the X2 message; the first processing module 1702a is configured to send the information of the X2 message by using the S1 message; and/or, the device includes:

The second receiving module 1701b is configured to receive the S1 message to obtain the information of the S1 message, and the second processing module 1702b is configured to send the information of the S1 message by using the X2 message.

In an embodiment, the first processing module 1702a may be specifically configured to: send the information parsed from the X2 message to the S1 message for sending; the second processing module 1702b may be specifically configured to:

The information parsed in the S1 message is carried in the X2 message and sent. In an embodiment, the first processing module 1702a may be specifically configured to: include the X2 message as a whole in the S1 message, where the second processing module 1702b is specifically configured to: include the S1 message as a whole in the Sent in the X2 message.

In an embodiment, the X2 message or the S1 message is used to initiate a handover request.

As shown in FIG. 18, an embodiment of the present invention further provides a message processing apparatus, where the apparatus may include:

The first obtaining module 1801a is configured to obtain information sent by using an X2 message.

The first processing module 1802a is configured to send a first retransmission notification, to indicate that the information is sent by using an S1 interface;

And / or, the device includes:

The second obtaining module 1801b is configured to obtain information sent by using the S1 message.

The second processing module 1802b is configured to send a second retransmission notification to indicate that the information is sent by using an X2 interface.

In an embodiment, when the information sent by the X2 message is obtained, the first retransmission notification is further used to indicate that the X2 interface is unavailable; when the information sent by the S1 message is obtained, the second weight The notification is also used to indicate that the S1 interface is not available.

In an embodiment, the first retransmission notification is carried in a specific bit of an existing message, or the first retransmission notification is carried in a custom message;

The second retransmission notification is carried in a specific bit of an existing message, or the first retransmission notification is carried in a custom message.

As shown in FIG. 19, an embodiment of the present invention further provides a message processing apparatus, where the apparatus may include:

a first receiving module 1901a, configured to receive a notification that an X2 interface with a neighboring site is available;

The first sending module 1902a is configured to send information by using an S1 interface when the X2 interface is unavailable; and / or,

a second receiving module 1901b, configured to receive a notification that an S1 interface between the neighboring site is available;

The second sending module 1902b is configured to send information by using the X2 interface when the S1 interface is unavailable.

As shown in FIG. 20, in an embodiment, when the information sent by the first sending module 1902a or the second sending module 1902b is information related to the switching, the message processing apparatus shown in FIG. 19 may further include:

The obtaining module 2001 is configured to acquire load indication information of the neighboring site;

The third sending module 2002 is configured to perform target site switching selection according to the load indication information.

In one embodiment, the notification of whether the X2 interface between the receiving and the neighboring site is available includes: receiving a notification that the X2 interface between the serving site and the neighboring site is available, or receiving an X2 interface between the relaying site and the neighboring site Whether the notification is available;

The notification of whether the S1 interface between the receiving and the neighboring site is available includes: a notification of whether the S1 interface between the serving site and the neighboring site is available, or a notification of whether the S1 interface between the relaying site and the neighboring site is available.

The apparatus in this embodiment may perform various method flows of the previous embodiments, and the apparatus may specifically be a serving node in a network, including but not limited to a base station or a relay station.

In one embodiment, the received notification of whether the X2/S1 interface between the neighboring site is available is a neighbor relationship list, and the neighbor relationship list is used to indicate X2/S1 interface information with the neighboring site.

In the embodiment of the present invention, the X2 message is received to obtain the information of the X2 message, and the information of the X2 message is sent by using the S1 message; and/or, the S1 message is received to obtain the information of the S1 message, and the S1 message is sent by using the X2 message. The information enables flexible use of the X2 interface and the S1 interface, ensures smooth transmission of message content, and optimizes the signaling process; In the embodiment of the present invention, the information sent by the X2 message is obtained, and the first retransmission notification is sent to indicate that the information is sent by using the S1 interface; and/or, the information sent by the S1 message is obtained, and the second retransmission is sent. The notification is used to send the information by using the X2 interface, so as to implement the flexible use of the X2 interface and the S1 interface, ensure the smooth transmission of the message content, and optimize the signaling flow. In the embodiment of the present invention, the X2 between the neighboring site is received. Whether the interface is available for notification, when the X2 interface is unavailable, the S1 interface is used to send information; and/or, the notification of whether the S1 interface is available with the neighboring site is available, and when the S1 interface is unavailable, the information is sent by using the X2 interface, thereby realizing The flexible use of the X2 interface and the S1 interface ensures smooth transmission of message content and optimizes the signaling process.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. The scope of the invention, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A message processing method, characterized in that the method comprises:

and / or,

The method of claim 1, wherein the transmitting the information of the X2 message by using the S1 message comprises: carrying the information parsed from the X2 message to the S1 message for sending; and sending the information by using the X2 message The information of the S1 message includes: The information parsed from the S1 message is carried in the X2 message and sent.

The method of claim 2, wherein the sending, by using the S1 message, the information of the X2 message comprises: transmitting the X2 message as a whole in the S1 message;

The transmitting the information of the S1 message by using the X2 message includes: transmitting the S1 message as a whole in the X2 message.

The method according to any one of claims 1 to 3, wherein the X2 message or the S1 message is used to initiate a handover request.

A message processing method, characterized in that the method comprises:

Obtaining a message sent by the X2 message, and sending a first resend notification to indicate that the information is sent by using the S1 interface;

and / or,

Obtaining a message sent by the S1 message, and transmitting a second retransmission notification to indicate that the information is sent using the X2 interface.

The method according to claim 5, wherein, when the information sent by the X2 message is obtained, the first retransmission notification is further used to indicate that the X2 interface is unavailable; When the information sent by the si message is obtained, the second retransmission notification is further used to indicate that the S1 interface is unavailable.

The method according to claim 5 or 6, wherein the first retransmission notification is carried in a specific bit of an existing message, or the first retransmission notification is carried in a custom message. ;

8. A message processing method, characterized in that the method comprises:

and / or,

The method according to claim 8, wherein when the sent information is information related to the handover, the method further includes:

Obtain load indication information of the neighbor site;

According to the load indication information, target station switching selection is performed.

The method according to claim 8 or 9, wherein the receiving the notification that the X2 interface between the neighboring site is available comprises: receiving a notification of whether the X2 interface between the service site and the neighboring site is available, Or receiving a notification that the X2 interface between the relay site and the neighboring site is available;

The notification of whether the S1 interface between the receiving and the neighboring site is available includes: a notification of whether an S1 interface between the serving site and the neighboring site is available, or a notification of whether the S1 interface between the relaying site and the neighboring site is available.

The method according to claim 8 or 9, wherein the notification that the received X2/S1 interface between the neighboring site is available includes a neighbor relationship list, and the neighbor relationship list is used to indicate X2/S1 interface information with neighboring sites.

12. A message processing apparatus, the apparatus comprising:

And / or, the device includes:

The device according to claim 12, wherein the first processing module is configured to: send information parsed from the X2 message to the S1 message for transmission;

The second processing module is specifically configured to: send the information parsed from the S1 message to the X2 message for transmission.

14. A message processing apparatus, characterized in that the apparatus comprises:

And / or, the device includes:

a second processing module, configured to send a second retransmission notification, to indicate that the sending is performed by using the Χ2 interface

^ I Ft is self-defeating.

15. A message processing apparatus, the apparatus comprising:

a first receiving module, configured to receive a notification that the Χ2 interface is available to the neighboring site; the first sending module is configured to send the information by using the S1 interface when the Χ2 interface is unavailable; and/or,

a second receiving module, configured to receive a notification that an S1 interface between the neighboring site is available; The second sending module is configured to send information by using an X2 interface when the SI interface is unavailable.

The device according to claim 15, wherein when the information sent by the first sending module or the second sending module is related to the switching, the method further includes:

An obtaining module, configured to acquire load indication information of a neighboring site;

The third sending module is configured to perform target site switching selection according to the load indication information.