CN103037456A - Method, associated equipment and system for controlling relay node switchover - Google Patents

Abstract

The embodiment of the invention discloses a method, related equipment and a system for controlling switching of relay nodes. One of the methods for controlling relay node switching includes: the source base station determines whether the target base station and/or the target cell supports relay node RN switching; if the target base station and/or the target cell supports RN switching, the source base station follows the RN switching mode The RN is switched. The solution provided by the embodiment of the present invention is beneficial to ensure the reliability of RN handover.

Description

Method, related equipment and system for controlling switching of relay nodes

technical field

The present invention relates to the technical field of communication, in particular to a method for controlling switching of relay nodes, related equipment and a communication system.

Background technique

In a traditional network, the base station and user equipment (UE, User Equipment) communicate directly, and this network is a single-hop network centered on the base station. After a relay node (RN, Relaynode) is introduced, sometimes the communication between the base station and the UE can be performed indirectly through the RN, that is, there is a case of multi-hop transmission.

In the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial RadioAccess Network), the access link Uu is the air interface link between the UE and the RN, and the relay link Un is the RN and the evolved base station (eNB, Evolved NB) air link between them.

The working state of the RN can be divided into two types: UE state and Relay state. Wherein, when the RN is in the UE state, the RN does not start the Relay function, and at this time, no UE is attached to the RN. When the RN is in the Relay state, the RN starts the Relay function. At this time, several UEs may be attached to the RN, and the RN can provide service transmission services for these attached UEs.

With the development of mobile communication technology, RN may also have mobility, which requires RN to be able to perform handover (HO, Handover) between base stations. Therefore, how to ensure the reliability of RN handover as much as possible is a problem that needs to be solved.

Contents of the invention

Embodiments of the present invention provide a method for controlling relay node switching, related equipment and a communication system, so as to ensure the reliability of RN switching.

On the one hand, an embodiment of the present invention provides a method for controlling switching of a relay node, including:

The source base station determines whether the target base station and/or the target cell supports relay node RN switching;

If the target base station and/or the target cell support RN switching, the source base station switches the RN according to the RN switching mode.

Another aspect of the embodiment of the present invention provides a method for controlling relay node switching, including:

The relay node RN receives a switching command sent by the source base station indicating to switch to the target base station in RN switching mode, wherein the switching command is sent by the source base station after determining that the target base station and/or the target cell support RN switching;

The RN performs handover to the target base station in an RN handover mode.

Another aspect of the embodiment of the present invention provides a base station, including:

a determining unit, configured to determine whether the target base station and/or the target cell support relay node RN handover;

A switching control unit, configured to switch the RN according to the RN switching mode when the determining unit determines that the target base station and/or the target cell supports RN switching.

Another aspect of the embodiment of the present invention provides a relay node, including:

The receiving unit is configured to receive a switching command sent by the source base station indicating to switch to the target base station in the relay node RN switching mode, wherein the switching command is sent by the source base station after determining that the target base station and/or the target cell support RN switching;

The switching unit is configured to switch to the target base station in RN switching mode.

Another aspect of the embodiment of the present invention provides a communication system, including:

The base station as described in the embodiment, or the relay node as described in the embodiment.

It can be seen from the above that in the embodiment of the present invention, the source base station first determines whether the target base station and/or the target cell support relay node RN handover; For switching, since the source base station switches the RN according to the RN switching mode when the target base station and/or the target cell supports RN switching, this mechanism is conducive to ensuring the reliability of the RN switching, and thus can ensure that the RN in the Relay state is switching as much as possible. During the process, the service continuity of the attached UE under it.

Description of drawings

FIG. 1 is a schematic diagram of a network architecture in an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a relay node handover control method provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of another relay node handover control method provided by an embodiment of the present invention;

FIG. 4 is a schematic flowchart of another relay node switching control method provided by an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for a source base station to determine whether a target base station and/or a target cell supports RN switching according to an embodiment of the present invention;

FIG. 6 is a schematic flowchart of another method for the source base station to determine whether the target base station and/or the target cell supports RN handover according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of another method for the source base station to determine whether the target base station and/or the target cell supports RN switching according to an embodiment of the present invention;

FIG. 8 is a schematic flowchart of another method for the source base station to determine whether the target base station and/or the target cell supports RN switching according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of another method for the source base station to determine whether the target base station and/or the target cell supports RN switching according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a base station provided by an embodiment of the present invention;

FIG. 11 is a schematic diagram of another base station provided by an embodiment of the present invention;

Fig. 12 is a schematic diagram of a relay node provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a method for controlling switching of a relay node, related equipment, and a communication system.

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The following describes in detail respectively through specific examples.

Referring to FIG. 1 , it is a schematic diagram of a network architecture in an embodiment of the present invention. Among them, one or more RNs, such as RN1, RN2 or RN3, can access the network through the evolved donor base station (DeNB, Donor eNB). Link Un. During the process of accessing the network, the RN will establish a connection with a mobility management entity (MME, Mobile Management Entity)/serving gateway (S-GW, Serving Gateway). Then the RN starts a relay (Relay) function, so that one or more UEs, such as UE1, UE2, UE3 or UE4, can also access the network through the RN.

An embodiment of the method for controlling relay node switching in the present invention may include: the source base station determines whether the target base station and/or the target cell supports RN switching; if the target base station and/or the target cell supports RN switching, the source base station follows the RN switching The mode switches the RN.

Referring to FIG. 2, a method for controlling relay node switching provided by an embodiment of the present invention may include:

201. The source base station determines whether the target base station and/or the target cell supports RN switching;

Wherein, the source base station may be, for example, a DeNB in a multi-hop network; the target cell is a cell served by the target base station.

In an actual network, the RN may perform measurement reporting periodically or aperiodically, or when the source base station triggers or event triggers the measurement report. If the source base station finds that the RN meets the handover condition based on the measurement report, for example, the RN is If the channel quality of the current cell of the RN drops to the set threshold, or the channel quality of the neighboring cell of the current cell where the RN is located is already better than the set threshold of the channel quality of the current cell where the RN is located, the source base station can choose whether to It is the target cell for RN handover and handover.

The source base station may determine whether the target base station and/or the target cell supports RN handover in various ways. The source base station can be determined by displaying an indication, for example, whether the target base station and/or the target cell supports RN switching can be determined through the type information of the target base station and/or the target cell. If the above type information includes an RN handover capability indication for indicating whether the target base station and/or target cell supports RN handover, the source base station may, according to the RN handover capability indication contained in the acquired type information of the target base station and/or target cell To determine whether the target base station and/or the target cell supports RN switching, wherein the RN switching capability indication can be carried by a dedicated information element (IE, information element), that is, the type of information is extended to carry the RN switching capability The indicated dedicated IE can indicate different RN switching capabilities through different values. Alternatively, the source base station can also use the default indication method to determine whether the target base station and/or the target cell supports RN handover. The base station and/or the target cell support RN handover, and the source base station can determine that the target base station and/or target cell support RN handover; /or the target cell does not support RN handover, and the source base station may determine that the target base station and/or the target cell does not support RN handover. Alternatively, the source base station may also determine whether the target base station and/or the target cell supports RN handover by means of an implicit indication. IE, such as an IE used to indicate that the type of the target base station is DeNB or ordinary eNB, to indirectly indicate whether the target base station and/or the target cell supports RN handover, wherein, if the type information contains indication information indicating that the target base station is a DeNB , the source base station can determine that the target base station supports RN switching, if the type information includes indication information indicating that the target base station is a normal eNB, the source base station can determine that the target base station does not support RN switching, and so on.

In the embodiment of the present invention, the source base station may acquire the type information of the target base station and/or the target cell from the target base station or other neighboring base stations. For example, the source base station may acquire the type information of the target base station and/or the target cell from the target base station or other neighboring base stations based on the X2 service flow. Alternatively, the source base station may also obtain the type information of the target base station and/or the target cell from the MME, for example, the source base station may obtain the type information of the target base station and/or the target cell from the MME based on the S1 service flow. Alternatively, the source base station may obtain the type information of the target base station and/or the target cell from the RN, for example, the source base station may receive a measurement report message sent by the RN, and the measurement report message includes the type information of the target base station and/or the target cell. Alternatively, the source base station may also obtain a Neighbor Relation Table (NRT, Neighbor Relation Table) from an Operation Administration Maintenance (OAM, Operation Administration Maintenance) system, and obtain attribute information from the Neighbor Relation Table, where the attribute information may indicate Whether the target base station and/or the target cell support RN handover. Alternatively, the source base station may also determine whether the target base station and/or the target cell supports RN handover in other ways, which will not be exemplified here.

202. If the target base station and/or the target cell supports RN switching, the source base station switches the RN according to the RN switching mode.

In the embodiment of the present invention, the RN can be switched in the RN switching mode, or can be switched in the UE switching unit. Wherein, the RN uses UE handover mode, that is, the RN performs handover in the UE state, and at this time, the RN performs handover as UE, and does not have a Relay function. The handover process of the RN in the UE handover mode may be similar to the handover process of the existing common UE, which will not be repeated here. The RN handover mode is different from the UE handover mode. The RN handover mode is a handover mode in which the RN performs handover in the Relay state and maintains service continuity of the UE attached to the RN during the handover process. In the RN switching mode, operations such as reconfiguration of the Un interface between the RN and the target base station, and context migration of the UE served by the RN may also be included.

In the embodiment of the present invention, if the source base station determines that the target base station and/or the target cell can support RN switching, the source base station can switch the RN according to the RN switching mode. Wherein, the source base station can switch the RN in the RN switching mode based on different interfaces. It can be understood that the source base station can switch the RN in a variety of ways, as long as the RN can switch in the Relay state and During the handover process, it is enough to keep the service continuity of the UE attached to the RN.

For example, the process of switching the RN based on the X2 interface according to the RN switching mode may include: first, the source base station initiates a switching request to the target base station, wherein the switching request may carry the context information of the RN and the context information of the UE attached to the RN information; the target base station sends a handover request confirmation to the source base station; the source base station instructs the RN to perform handover to the RN; after the RN switches to the target base station, a relay link between the RN and the target base station is established; the target base station instructs the MME The S1 path of the RN and the UE attached to the RN is transferred from the source base station to the target base station.

It should be noted that, in the RN handover mode, the RN can also be handed over from the source base station to the target base station in other ways, and examples will not be given here.

If the target base station and/or the target cell do not support RN handover, the source base station can switch the RN according to the UE handover mode, that is, the RN will be handed over as a UE, or the source base station can not switch to the target base station or target cell. Switch the RN. For example, the source base station may choose not to switch the RN temporarily, or may reselect to switch the RN to another target cell that supports RN switching.

It can be seen from the above that in this embodiment, the source base station first determines whether the target base station and/or the target cell supports relay node RN handover; Handover, since the source base station switches the RN according to the RN switching mode when the target base station and/or the target cell supports RN switching, this mechanism is conducive to ensuring the reliability of the RN switching, which in turn allows the RN in the Relay state to , the service continuity of the attached UE under it.

In the above embodiments, the source base station first determines whether the target base station and/or the target cell supports RN handover, and if so, the source base station can switch the RN according to the RN handover mode as an example. . Another handover control mechanism is introduced below. The source base station may not be sure whether the target base station and/or target cell support RN handover, but defaults that the target base station and/or target cell support RN handover, and initiates RN handover. Whether the base station and/or the target cell supports RN handover is used to control the subsequent handover process of the RN.

The embodiment of the present invention provides another method for controlling switching of relay nodes, which may include:

The target base station receives the handover request message, wherein the handover request message includes an RN switching mode indication; if the target base station and/or the target cell support the RN switching mode, the target base station switches the RN according to the RN switching mode; otherwise, it can switch the RN according to the UE switching mode. The mode of the RN is switched or the switching of the RN may be rejected.

Referring to FIG. 3, another method for controlling relay node switching may include:

301. The target base station receives a handover request message;

Wherein, the handover request message may include an RN handover mode indication, and the RN handover mode indication, for example, indicates that the RN prepares to handover in the RN handover mode.

In practical applications, for example, the target base station can receive the X2 handover request message sent by the source base station, and the X2 handover request message can include an RN handover mode indication; or, the target base station can receive the S1 handover request message sent by the mobility management network element, the The S1 handover request message may include an RN handover mode indication. At this time, the source base station may, for example, default that the target base station and/or the target cell support RN switching, so it may request to perform RN switching in the RN switching mode.

302. If the target base station and/or the target cell support RN switching, the target base station switches the RN according to the RN switching mode, otherwise, the target base station switches the RN according to the UE switching mode or rejects the switching of the RN.

It can be seen from the above that after the target base station in this embodiment receives the handover request message including the RN switching mode indication, if the target base station and/or the target cell support the RN switching mode, the target base station switches the RN according to the RN switching mode, otherwise, it can Handover the RN according to the UE handover mode or reject the handover of the RN. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the UE attached to the RN in the Relay state during the handover process.

The following describes from the perspective of relay nodes.

Another embodiment of the method for controlling relay node handover in the present invention may include: the relay node RN receives a handover command sent by the source base station indicating to switch to the target base station in RN handover mode, wherein the handover command is determined by the source base station The target base station and/or the target cell support sending after RN handover; the RN performs handover to the target base station in an RN handover mode.

Referring to FIG. 4, another method for controlling relay node switching provided by an embodiment of the present invention may include:

401. The RN receives a handover command sent by the source base station indicating to switch to the target base station in the RN handover mode;

Wherein, the above handover command is sent by the source base station after determining that the target base station and/or the target cell supports RN handover, wherein the specific method for the source base station to determine whether the target base station and/or the target cell supports RN handover can refer to the above-mentioned embodiment Relevant descriptions will not be repeated here.

In an actual network, the RN may perform measurement reporting periodically or aperiodically, or when the source base station triggers or event triggers the measurement report. If the source base station finds that the RN meets the handover condition based on the measurement report, for example, the RN is If the channel quality of the current cell of the RN drops to the set threshold, or the channel quality of the neighboring cell of the current cell where the RN is located is already better than the set threshold of the channel quality of the current cell where the RN is located, the source base station can choose whether to It is the target cell for RN handover and handover. Wherein, the source base station may select a suitable target cell for handover according to the measurement report message reported by the RN (the measurement report message may include measurement results for multiple cells). In particular, if the RN indicates only one DeNB cell in the measurement report, the source base station can also directly perform handover according to the reported DeNB cell. Wherein, if the target base station and/or the target cell support RN handover, the source base station may send a handover command to the RN indicating to switch to the target base station in RN handover mode.

402. The RN performs handover to the target base station in an RN handover mode.

Among them, in the process of switching to the target base station, the RN can first synchronize to the target base station, and then access the target base station based on a random access mechanism. After successfully accessing the target base station, the RN can notify the source base station of the successful handover to the target base station The target base station, after the RN switches to the target base station, establishes a relay link between the RN and the target base station;

The target base station may instruct the MME to move the S1 path of the RN and the UE attached to the RN from the source base station to the target base station.

It can be seen from the above that, after determining that the target base station and/or the target cell support RN handover, the source base station in this embodiment instructs the RN to perform handover according to the RN handover mode. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the attached UE under the RN in the Relay state during the handover process.

In order to facilitate a better understanding and implementation of the above-mentioned solutions in the embodiments of the present invention, several specific application scenarios are used below to carry out specific implementation methods for the source base station in the above-mentioned embodiments to determine whether the target base station and/or the target cell supports RN handover Give an example.

Referring to FIG. 5 , a method for the source base station to determine whether the target base station and/or the target cell supports RN handover provided by an embodiment of the present invention, in this method, the source base station can obtain the type of the target base station and/or the target cell from the target base station information to determine whether the target base station and/or the target cell supports RN handover according to the type of information, the method may include:

501. The source base station sends an X2 establishment request message to the target base station.

Among them, the source base station can carry the indication information of whether the source base station supports RN handover in the X2 establishment request message, such as Relay Mobility Support. In this way, the target base station can also know whether the source base station supports RN handover. If the handover is requested, the target base station can handover the RN to the source base station that supports RN handover.

In an implementation manner, the format of the X2 establishment request message may be as follows, for example:

Among them, the bold font in the above format is the extended content,

表示该基站支持RN切换模式，而指示该基站不支持RN切换模式的消息格式，可以此类推。one of them

The message format indicates that the base station supports the RN switching mode, and indicates that the base station does not support the RN switching mode, and so on.

502. The source base station receives the X2 setup response message sent by the target base station.

Wherein, the target base station may carry the type information of the target base station and/or the target cell in the X2 establishment response message, wherein the type information may include indication information whether the target base station and/or the target cell support RN handover.

In an implementation manner, the format of the X2 establishment response message may be as follows, for example:

Among them, the bold font in the above request format is the extended content,

即表示该基站支持中继站切换模式，而指示该基站不支持RN切换模式的消息格式可以此类推。where, in the above format

That is, it means that the base station supports the relay station switching mode, and the message format indicating that the base station does not support the RN switching mode can be deduced by analogy.

After receiving the X2 setup response message sent by the target base station, the source base station can parse the X2 setup response message, and then learn whether the target base station and/or the target cell support RN handover according to the type information carried therein.

In the above solution of this embodiment, a dedicated IE is mainly extended in the X2 establishment request message and the X2 establishment response message to indicate the RN switching capability of the base station. In addition, the RN switching capability of the base station can also be indicated through an implicit indication method, for example, a special eNB ID, ECGI value, or other IEs that can also indicate whether the target base station is a DeNB identity can be defined to indirectly indicate the target base station and/or Or whether the target cell supports RN handover, for example, if the base station is a DeNB, it indicates that it supports RN handover, and if the base station is an ordinary eNB, it indicates that it does not support RN handover.

After the above-mentioned X2 service process interaction, the source base station knows whether the target base station and/or the target cell support RN handover, and then the source base station can select a suitable target cell for the RN according to the measurement report reported by the RN, so as to satisfy the attachment requirements as much as possible. The service continuity of the UE in the RN. For example, if the target base station and/or the target cell support RN switching, the source base station can switch the RN according to the RN switching mode. In addition, if the target base station and/or the target cell do not support RN handover, the source base station may switch the RN according to the UE handover mode, or the source base station may not hand over the RN to the target base station or target cell, but may select it to support RN The target cell of the handover is handed over.

In the embodiment of the present invention, the base station with the relay function can also enable or disable the function of supporting RN handover, for example, according to actual needs, or based on the configuration and requirements of the operator, enable or disable the function of supporting RN handover, that is to say , a certain base station may support RN handover in some time periods, but may not support RN handover in other time periods. For example, the DeNB can notify the neighbor base station connected to the DeNB through the X2 interface through the X2eNBConfiguration Update process that the DeNB has enabled or disabled the function of the DeNB supporting RN handover, so that the neighbor base station can handle the handover of the relay station according to this information. Alternatively, the DeNB may, for example, notify the neighbor base station connected to the DeNB through the X2 interface through the X2 eNB ConfigurationUpdate process whether the DeNB currently supports RN handover. For example, the target base station may send a base station configuration update message to the source base station, where the base station configuration update message carries type information of the target base station and/or the target cell, where the type information may include whether the target base station and/or the target cell support RN handover Indication information; after the source base station receives the base station configuration update message from the target base station, it knows whether the target base station and/or the target cell supports RN handover, and the source base station can send a base station configuration update confirmation message to the target base station, and the base station configuration update The confirmation message may also carry type information of the source base station, wherein the type information may include indication information whether the source base station supports RN handover, etc., and the target base station may also know whether the source base station supports RN handover based on this.

It can be seen from the above that in this embodiment, the source base station and the target base station exchange whether they support RN handover through the X2 business process; if it is determined that the target base station and/or the target cell supports RN handover, the source base station subsequently switches the RN according to the RN handover mode , this mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the attached UE under the RN in the Relay state during the handover process.

Referring to FIG. 6 , another method for the source base station to determine whether the target base station and/or the target cell supports RN handover provided by an embodiment of the present invention, in this method, the source base station can obtain the neighbor relation list from the OAM system, and use the A method for determining whether the target base station and/or the target cell supports RN handover by the relationship list, the method may include:

601. The source base station acquires a neighbor cell relationship list from a network OAM system.

Wherein, since the deployment information of other base stations in the area where the active base station is located is stored in the network OAM system, the source base station can also obtain type information of neighboring base stations and/or neighboring cells from the network OAM system. The DeNB can obtain the neighbor relationship list NRT from the network OAM system.

The allowed operations between the cell and a neighboring cell are defined in the neighbor relationship list maintained by each cell. For example, the following attributes can be added to the neighbor relationship table:

No RN HO: If checked, the Neighbor cell Relation shall not be used by the eNB for RN handover reasons.

Among them, the above-mentioned "No RN HO" attribute in the neighbor relationship table indicates that the target base station/or target cell supports RN handover; if the target base station/or target cell does not support RN handover, the above-mentioned "No RN HO" may not be carried in the neighbor relationship table attribute, at this time, the source base station defaults to indicate that the target base station/or the target cell does not support RN handover.

602. The source base station acquires attribute information from the neighbor cell relationship list.

Among them, if the source base station can obtain No RN HO attribute information from the neighbor cell relationship list, the attribute information includes indication information indicating that the target base station/or the target cell supports RN handover, and the source base station can know the target base station/or target cell based on this Support RN handover, if the source base station does not obtain the No RN HO attribute information from the neighbor cell relationship list or obtains other attribute information indicating that the target base station/or the target cell does not support RN handover, the source base station can determine accordingly The target base station/or the target cell does not support RN handover.

The source base station learns whether the target base station and/or the target cell support RN handover by interacting with the network OAM system, and then the source base station can select a relatively suitable target cell for the RN according to the measurement report reported by the RN to meet the attachment requirements as much as possible. The service continuity of the UE in the RN. For example, if the target base station and/or the target cell support RN switching, the source base station can switch the RN according to the RN switching mode. In addition, if the target base station and/or the target cell do not support RN switching, the source base station can switch the RN according to the UE switching mode, or the source base station can not switch the RN to the target base station or the target cell, but can choose it to support RN switching other target cell for handover.

It can be seen from the above that in this embodiment, the source base station interacts with the network OAM system to determine whether the target base station and/or the target cell supports RN switching. If it supports it, the source base station switches the RN according to the RN switching mode. The reliability of the RN handover can further enable the service continuity of the attached UE under the RN in the Relay state during the handover process.

Referring to FIG. 7 , another method for the source base station to determine whether the target base station and/or the target cell supports RN handover provided by an embodiment of the present invention, in this method, the source base station can obtain the type of the target base station and/or the target cell from the RN information, to determine whether the target base station and/or the target cell supports RN handover according to the type of information, the method may include:

701. The source base station receives the measurement report message sent by the RN;

In practical application scenarios, RN can obtain the distribution information of all accessible DeNBs from the network OAM system, and RN can notify the source base station which of several target base stations are DeNBs and which are eNBs, and DeNBs generally support RN handover, eNB does not support RN handover.

Wherein, the measurement report message (Measurement Report Message) carries the measurement result of the target base station (DeNB or eNB), and also carries the type information of the target base station and/or the target cell, and the type information contains information for indicating the target base station And/or indication information of whether the target cell supports RN switching.

Wherein, the above-mentioned type information of the target base station and/or the target cell may be indicated (explicitly indicated) through a dedicated information element, or may be indirectly indicated while indicating other information ( implicit indication).

In addition, in addition to reporting the measurement report, the RN may also notify the source base station of the type information of the target base station and/or the target cell through dedicated signaling, such as an RRC message, an S1 message or an X2 message.

In one embodiment, the format of the Measurement Report message reported by the RN may be as follows, for example:

Wherein, an example of the "MeasResults" information element in the above message format may be as follows, for example:

信元中字体加粗部分为扩展内容；Among them, the above

The bold font in the cell is the extended content;

指示出目标小区为一个DeNB Cell，也就相当于指示出目标基站和/或目标小区支持RN切换，而指示目标基站和/或目标小区不支持RN切换模式的测量报告消息格式，可以此类推。in,

Indicating that the target cell is a DeNB Cell is equivalent to indicating that the target base station and/or the target cell support RN switching, while indicating that the target base station and/or the target cell do not support the measurement report message format of the RN switching mode, and so on.

It should be noted that the above method of carrying the type information of the target base station and/or the target cell in the measurement report message is only an example, as long as the source base station can distinguish the target cell as a DeNB cell or a normal eNB cell through the measurement report, or distinguish the target base station as a DeNB or common eNB can be used, which is not specifically limited here.

702. The source base station determines whether the target base station and/or the target cell supports RN switching.

Wherein, assuming that the source base station determines that the target base station is a DeNB and/or the target cell is a DeNB cell according to the type information of the target base station and/or the target cell carried in the measurement report message, the source base station can determine the target base station and/or the target cell accordingly. The cell supports RN switching, otherwise, the source base station may determine that the target base station and/or the target cell does not support RN switching.

If the target base station and/or the target cell support RN switching, the source base station can select the target cell with relatively good channel quality indicated by the measurement report reported by the RN, and switch the RN according to the RN switching mode; if the target base station and/or the target cell If RN switching is not supported, the source base station can switch the RN according to the UE switching mode or not perform switching temporarily, or the source base station can select other target cells with relatively good channel quality indicated by the measurement report reported by the RN, and follow the RN switching mode Or the UE handover mode is used to handover the RN.

It can be understood that the above-mentioned process of this embodiment mainly uses the measurement report message to notify the source base station whether the target base station and/or the target cell supports RN handover by the RN. Certainly, the RN may also notify the source base station whether the target base station and/or the target cell supports RN handover in various ways. For example, the RN may send a radio resource control (RRC, Radio Resource control) message to the source base station, and the RRC message carries indication information for indicating whether the target base station and/or the target cell supports RN handover; or, the RN may send a message to the source base station Sending an S1 message, the S1 message carrying indication information indicating whether the target base station and/or the target cell supports RN handover; or, the RN may send an X2 message to the source base station, wherein the X2 message may carry information indicating that the target base station And/or indication information of whether the target cell supports RN switching. Of course, the RN may also notify the source base station in other ways whether the target base station and/or the target cell support RN handover. Based on this, the source base station can know whether the target base station and/or the target cell supports RN switching.

It can be seen from the above that the RN in this embodiment determines whether the target base station and/or the target cell supports relay node RN handover; and notifies the source base station whether the target base station and/or the target cell supports RN handover, thereby enabling the source base station to know the target Whether the base station and/or the target cell support RN handover, if the target base station and/or target cell support RN handover, the source base station can subsequently handover the RN according to the RN handover mode. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the attached UE under the RN in the Relay state during the handover process.

Referring to FIG. 8 , another method for the source base station to determine whether the target base station and/or the target cell supports RN handover provided by an embodiment of the present invention, in this method, the source base station can obtain the type of the target base station and/or the target cell from the MME information, to determine whether the target base station and/or the target cell supports RN handover according to the type of information, the method may include:

801. The source base station sends an S1 handover request message to the MME;

Wherein, the S1 switching request message may include an RN switching mode indicator (RN HO indicator), and the RN HO indicator may indicate that the RN is ready to switch in the RN mode.

The RN switching mode indication may be carried by a dedicated IE (explicit indication), or may be indicated by an implicit indication.

802. The MME sends an S1 handover request message to the target base station;

Wherein, the S1 switching request message includes an RN switching mode indication (RN HO indicator), and the RN HO indicator indicates that the RN is ready to switch in the RN switching mode.

The RN switching mode indication may be carried by a dedicated IE (explicit indication), or may be indicated by an implicit indication.

803. The target base station sends an S1 handover request response (S1 HO Request ACK) message to the MME;

Wherein, if the target base station is a DeNB, then the target base station can identify the RN HO indicator and other possible information carried in the S1 handover request message, and can feed back the S1 HO Request ACK message to the MME, wherein the S1 HO Request The ACK message can carry the confirmation indication corresponding to the RNHO indicator (the source base station can also know that the target base station is a DeNB and supports RN handover). Of course, the S1 HO Request ACK message may also carry other information or indications required for RN handover. If the target base station is an ordinary eNB, then the target base station may ignore the RN HO indicator carried in the S1 handover request message, and the target base station assumes that the RN is the UE by default, and the target base station can feed back the S1 HO Request ACK message to the MME (its format and content can be It is the same as the S1 HO Request ACK message corresponding to the UE), wherein the S1 HO Request ACK message does not include the confirmation indication corresponding to the RN HO indicator (the source base station can also know that the target base station is an eNB, which does not support RN switching).

804. The MME sends an S1 handover command (S1 HO Command) message to the source base station;

Among them, if the S1 HO Request ACK message carries the confirmation indication of the corresponding RN HO indicator, the MME can recognize the confirmation indication of the corresponding RN HO indicator, and can carry the corresponding RN HO indicator in the S1 HO Command message sent to the source base station. The acknowledgment indication of the indicator, of course, the S1 HO Command message may also carry other information or indications required for RN handover. Based on this, the source base station can also know that the target base station is a DeNB, which supports RN handover, and the source base station can perform subsequent RN handover operations according to the RN handover mode.

Wherein, the acknowledgment indication corresponding to the RN HO indicator may be carried by a dedicated IE (explicit indication), or may be indicated by an implicit indication.

In addition, if the S1 HO Request ACK message does not carry the confirmation indication of the corresponding RN HO indicator, the MME can recognize that the target base station is a normal eNB, and the S1 HO Command message sent by the MME to the source base station does not carry the corresponding RN HO indicator. The acknowledgment indication of the indicator, of course, the S1 HO Command message may also carry other information or indications required for RN handover. Based on this, the source base station can also know that the target base station is a common eNB, which does not support RN handover, and the source base station can perform subsequent RN handover operations according to the UE handover mode.

It can be seen from the above that in this embodiment, during the S1 handover process, the source base station first determines whether the target base station and/or the target cell supports relay node RN handover through the MME; if it is determined that the target base station and/or the target cell supports RN handover, the source The base station performs subsequent handover of the RN according to the RN handover mode. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the UE attached to the RN in the Relay state during the handover process.

Referring to FIG. 9 , another method for the source base station to determine whether the target base station and/or the target cell supports RN handover provided by an embodiment of the present invention, in this method, the source base station can obtain the information of the target base station and/or the target cell from the target base station. type information, to determine whether the target base station and/or the target cell supports RN switching according to the type information, the method may include:

901. The source base station sends an X2 handover request message to the target base station.

Wherein, the S1 switching request message may include an RN switching mode indicator (RN HO indicator), and the RN HO indicator may indicate that the RN is ready to switch in the RN mode.

The RN switching mode indication may be carried by a dedicated IE (explicit indication), or may be indicated by an implicit indication.

902. The target base station sends an X2 handover request response message (X2 HO RequestACK) to the source base station;

Wherein, if the target base station is a DeNB, then the target base station can identify the RN HO indicator and other possible information carried in the X2 handover request message, and can feed back the X2 HO Request ACK message to the source base station, wherein the X2 HO The Request ACK message can carry the confirmation indication corresponding to the RNHO indicator (the source base station can also know that the target base station is a DeNB and supports RN handover). Of course, the S1 HO Request ACK message may also carry other information or indications required for RN handover. If the target base station is an ordinary eNB, then the target base station may ignore the RN HO indicator carried in the X2 handover request message, and the target base station assumes that the RN is a UE by default, and the target base station can feed back the X2 HO Request ACK message (its format and The content can be the same as the X2 HO Request ACK message corresponding to the UE), wherein the X2 HO Request ACK message does not include the confirmation indication corresponding to the RN HO indicator (the source base station can also know that the target base station is an eNB, which does not support RN handover).

Wherein, the acknowledgment indication corresponding to the RN HO indicator may be carried by a dedicated IE (explicit indication), or may be indicated by an implicit indication.

The source base station receives the X2 handover response message sent by the target base station.

Among them, if the X2 HO Request ACK message carries the confirmation indication corresponding to the RN HO indicator, the source base station can also know that the target base station is a DeNB, which supports RN handover, and the source base station can perform RN subsequent handover operations according to the RN handover mode. The base station may also perform the RN handover according to the RN handover mode and the source base station.

In addition, if the X2 HO Request ACK message does not carry the confirmation indication corresponding to the RN HO indicator. Based on this, the source base station can also know that the target base station is an ordinary eNB, which does not support RN handover. The source base station can perform RN subsequent handover operations according to the UE handover mode, and the target base station can also perform the RN handover according to the UE handover mode and the source base station. The RN performs handover as a UE. Alternatively, the source base station may not perform handover temporarily, or the source base station may choose to handover the RN to another target cell that supports RN handover.

It can be seen from the above that in this embodiment, during the X2 handover process, the source base station first determines whether the target base station and/or the target cell supports relay node RN handover through the target base station; if it is determined that the target base station and/or the target cell supports RN handover, then The source base station performs subsequent handover of the RN according to the RN handover mode. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the UE attached to the RN in the Relay state during the handover process.

In order to facilitate better implementation of the above methods in the embodiments of the present invention, related devices for implementing the above methods are also provided below.

Referring to FIG. 10 , an embodiment of the present invention provides a base station 1000 , which may include: a determination unit 1010 and a handover control unit 1020 .

Wherein, the determining unit 1010 is configured to determine whether the target base station and/or the target cell support relay node RN handover;

The switching control unit 1020 is configured to switch the RN according to the RN switching mode when the determining unit 1010 determines that the target base station and/or the target cell supports RN switching.

Wherein, the determining unit 1010 may determine whether the target base station and/or the target cell supports RN handover in various ways. The determining unit 1010 may determine by displaying an indication, for example, whether the target base station and/or the target cell supports RN handover may be determined through the type information of the target base station and/or the target cell. If the above type information includes an RN handover capability indication for indicating whether the target base station and/or the target cell supports RN handover, the determining unit 1010 may, according to the obtained RN handover capability contained in the type information of the target base station and/or the target cell Indicate to determine whether the target base station and/or target cell supports RN handover, wherein the RN handover capability indication can be carried by IE, that is, a dedicated IE for carrying the RN handover capability indication is extended in this type of information, and can be carried by Different values indicate different RN switching capabilities. Alternatively, the determining unit 1010 may also determine whether the target base station and/or the target cell supports RN handover in a default indication manner, for example, if there is an IE carrying an RN handover capability indication in the type information of the target base station and/or the target cell, it indicates The target base station and/or the target cell support RN handover, and the determination unit 1010 can determine that the target base station and/or the target cell support RN handover; The base station and/or the target cell do not support RN handover, and the determining unit 1010 may determine that the target base station and/or the target cell do not support RN handover. Alternatively, the determining unit 1010 may also determine whether the target base station and/or the target cell supports RN handover by means of an implicit indication, for example, the determining unit 1010 may use the bearer other Information IE, such as an IE used to indicate that the type of the target base station is DeNB or ordinary eNB, to indirectly indicate whether the target base station and/or the target cell supports RN handover, wherein, if the type information contains indication information, the determining unit 1010 can determine that the target base station supports RN handover based on this, and if the type information includes indication information indicating that the target base station is a common eNB, the determining unit 1010 can determine that the target base station does not support RN handover based on this. analogy.

In an application scenario, the determining unit 1010 may be specifically configured to acquire type information of the target base station and/or target cell based on the X2 service flow, and determine whether the target base station and/or target cell support RN handover according to the type information, wherein, The type information includes indication information for indicating whether the target base station and/or target cell supports RN handover.

Among them, the determining unit 1010 may include, for example:

The first sending subunit is configured to send an X2 establishment request message to the target base station;

The first receiving subunit is configured to receive the X2 establishment response message sent by the target base station; wherein, the X2 establishment response message includes the type information of the target base station and/or the target cell;

Alternatively, the determining unit 1010 may include, for example:

The second receiving subunit is configured to receive a base station configuration update message sent by the target base station, where the base station configuration update message includes type information of the target base station and/or the target cell.

In another application scenario, the determining unit 1010 may be specifically configured to obtain a neighbor relationship list from the network operation management system; acquire attribute information from the neighbor relationship list; determine the target base station and/or target cell according to the attribute information Whether to support RN switching, wherein the attribute information includes indication information for indicating whether the target base station and/or the target cell supports RN switching;

In another application scenario, the determining unit 1010 may be specifically configured to: send an S1 handover request message to the MME; receive an S1 handover command message sent by the MME, where the S1 handover command message includes the information of the target base station and/or the target cell Type information: determine whether the target base station and/or the target cell supports RN switching according to the type information, wherein the type information includes indication information for indicating whether the target base station and/or the target cell supports RN switching.

In another application scenario, the determining unit 1010 may be specifically configured to receive a measurement report message sent by the RN; determine whether the target base station and/or the target cell supports RN handover according to the measurement report message, where the measurement report message includes The indication information is used to indicate whether the target base station and/or the target cell supports RN handover.

In an application scenario, the handover control unit 1020 can also be used to, when the determining unit 1010 determines that the target base station and/or the target cell do not support RN handover, handover the RN according to the UE handover mode, or do not send the RN to the target base station. Or the target cell switches over the RN.

It can be understood that the base station 1000 in this embodiment can be like the source base station in the above method embodiment, which can be used to cooperate to realize all the technical solutions in the above method embodiment, and the functions of each functional unit can be according to the above method embodiment. The method is specifically implemented, and its specific implementation process can refer to the relevant descriptions in the above-mentioned embodiments, which will not be repeated here.

It can be seen from the above that the source base station in this embodiment first determines whether the target base station and/or the target cell supports relay node RN handover; For switching, since the source base station switches the RN according to the RN switching mode when the target base station and/or the target cell supports RN switching, this mechanism is conducive to ensuring the reliability of the RN switching, and then can make the RN in the Relay state Among them, the service continuity of the attached UE under it.

Referring to FIG. 11 , an embodiment of the present invention provides another base station 1100 , which may include: a receiving unit 1110 and a handover control unit 1120 .

Wherein, the receiving unit 1110 is configured to receive a handover request message, where the handover request message includes a relay node RN handover mode indication;

The switching control unit 1120 is configured to switch the RN according to the RN switching mode when the base station 1100 supports RN switching, otherwise, switch the RN according to the user equipment UE switching mode or reject the switching of the RN.

In practical applications, the receiving unit 1110 may receive, for example, the X2 handover request message sent by the source base station, and the X2 handover request message may include an RN handover mode indication; or, the receiving unit 1110 may receive the S1 handover request message sent by the mobility management network element , the S1 handover request message may include an RN handover mode indication. At this time, the source base station may, for example, default that the target base station and/or the target cell support RN switching, so it may request to perform RN switching in the RN switching mode.

It can be understood that the base station 1000 in this embodiment can be like the source base station in the above method embodiment, which can be used to cooperate to realize all the technical solutions in the above method embodiment, and the functions of each functional unit can be according to the above method embodiment. The method is specifically implemented, and its specific implementation process can refer to the relevant descriptions in the above-mentioned embodiments, which will not be repeated here.

It can be seen from the above that after the target base station in this embodiment receives the handover request message including the RN switching mode indication, if the target base station and/or the target cell support the RN switching mode, the target base station switches the RN according to the RN switching mode, otherwise, it can Handover the RN according to the UE handover mode or reject the handover of the RN. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the UE attached to the RN in the Relay state during the handover process.

Referring to FIG. 12 , an embodiment of the present invention provides another relay node 1200 , including: a receiving unit 1210 and a switching unit 1220 .

Wherein, the receiving unit 1210 is configured to receive a handover command sent by the source base station indicating to switch to the target base station in the relay node RN handover mode, wherein the handover command is issued by the source base station after determining that the target base station and/or the target cell support RN handover send;

The switching unit 1220 is configured to switch to the target base station in RN switching mode.

Wherein, in the process of switching to the target base station, the switching unit 1220 can first synchronize to the target base station, and then access the target base station based on a random access mechanism, and the switching unit 1220 can notify the source after successfully accessing the target base station The base station is successfully switched to the target base station, and the relay link between the RN and the target base station is established after the RN switches to the target base station;

In an actual network, the relay node 1200 may perform measurement reporting periodically or aperiodically, or perform measurement reporting when triggered by the source base station or an event. If the source base station finds that the relay node 1200 satisfies the handover Conditions, for example, the channel quality of the current cell where the relay node 1200 is located drops to a set threshold, or the channel quality of the adjacent cell of the current cell where the relay node 1200 is located is already better than the channel quality setting of the current cell where the relay node 1200 is located The source base station can select whether to be the handover target cell of the relay node 1200 according to the information reported by the handover. Wherein, the source base station may select a suitable target cell for handover according to the measurement report message reported by the relay node 1200 (the measurement report message may include measurement results for multiple cells). In particular, if the relay node 1200 indicates only one DeNB cell in the measurement report, the source base station can also directly perform handover according to the reported DeNB cell. Wherein, if the target base station and/or the target cell support RN handover, the source base station may send a handover command to the relay node 1200 indicating to switch to the target base station in RN handover mode.

In an application scenario, the relay node 1200 may further include: a determination unit and a notification unit (not shown in the figure).

Wherein, the determining unit is used to determine whether the target base station and/or the target cell supports RN switching;

A notification unit, configured to notify the source base station whether the target base station and/or the target cell support RN handover.

In an application scenario, the notification unit may include:

The first notification subunit is configured to send a measurement report message to the source base station, where the measurement report message carries indication information for indicating whether the target base station and/or the target cell supports RN switching;

or,

The second notification subunit is configured to send an RRC message to the source base station, where the RRC message carries indication information for indicating whether the target base station and/or the target cell supports RN switching;

or,

The third notification subunit is configured to send an S1 message to the source base station, where the S1 message carries indication information for indicating whether the target base station and/or the target cell supports RN switching;

or,

The fourth notification subunit is configured to send an X2 message to the source base station, where the X2 message carries indication information for indicating whether the target base station and/or the target cell supports RN switching.

It can be understood that the relay node 1200 in this embodiment can be like the relay node in the above method embodiment, and it can be used to cooperate to realize all the technical solutions in the above method embodiment, and the functions of each functional unit can be implemented according to the above method The method in the example is specifically implemented, and the specific implementation process may refer to the relevant description in the above-mentioned embodiments, and details are not repeated here.

It can be seen from the above that the RN in this embodiment can determine whether the target base station and/or the target cell support relay node RN handover; and notify the source base station whether the target base station and/or target cell support RN handover, thereby allowing the source base station to know accordingly Whether the target base station and/or the target cell supports RN switching, and if the target base station and/or target cell supports RN switching, the source base station can subsequently switch the RN according to the RN switching mode. This mechanism is beneficial to ensure the reliability of the RN handover, and further enables the service continuity of the attached UE under the RN in the Relay state during the handover process.

The embodiment of the present invention also provides a communication system, including:

Base station 1000, base station 1100 or relay node 1200.

The embodiment of the present invention also provides a communication system, including:

The source base station is used to determine whether the target base station and/or the target cell supports relay node RN switching; if the target base station and/or target cell supports RN switching, the source base station switches the RN according to the RN switching mode.

The relay node is configured to receive a handover command sent by the source base station indicating to switch to the target base station in RN handover mode, wherein the handover command is sent by the source base station after determining that the target base station and/or the target cell support RN handover; Handover to the target base station in RN handover mode.

It can be understood that the source base station in this embodiment can be like the source base station in the above method embodiment, and the relay node can be like the relay node in the above method embodiment, which can be used to cooperate to realize all the technical solutions in the above method embodiment , the functions of each functional unit thereof can be specifically implemented according to the method in the above method embodiment, and the specific implementation process can refer to the relevant description in the above embodiment, and will not be repeated here.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and units involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

To sum up, in the embodiment of the present invention, the source base station first determines whether the target base station and/or the target cell supports relay node RN handover; Handover, since the source base station switches the RN according to the RN switching mode when the target base station and/or the target cell supports RN switching, this mechanism is conducive to ensuring the reliability of the RN switching, and thus can ensure that the RN in the Relay state is switching as much as possible. During the process, the service continuity of the attached UE under it.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, the above-mentioned storage medium It can be read-only memory, disk or CD-ROM, etc.

A method for controlling relay node switching provided by the present invention, related equipment, and communication system have been introduced in detail above. For those skilled in the art, according to the embodiments of the present invention, they will understand both the specific implementation and the scope of application. There are changes, and in summary, the contents of this specification should not be construed as limiting the present invention.

Claims (17)

1. A method for controlling relay node switching, characterized in that, comprising: The source base station determines whether the target base station and/or the target cell supports relay node RN switching; If the target base station and/or the target cell support RN switching, the source base station switches the RN according to the RN switching mode. 2. The method according to claim 1, characterized in that, The determining whether the target base station and/or the target cell supports RN switching includes: Acquiring the type information of the target base station and/or the target cell based on the X2 service flow; determining whether the target base station and/or the target cell supports RN switching according to the type information; Wherein, the type information includes indication information for indicating whether the target base station and/or the target cell supports RN handover. 3. The method of claim 2, wherein, The acquisition of type information of the target base station and/or target cell based on the X2 business process includes: Sending an X2 establishment request message to the target base station; receiving an X2 establishment response message sent by the target base station; wherein the X2 establishment response message includes the type information of the target base station and/or the target cell; or, A base station configuration update message sent by the target base station is received, where the base station configuration update message includes type information of the target base station and/or the target cell. 4. The method of claim 3, wherein, The X2 establishment request also includes type information of the source cell and/or the source base station, and the type information of the source base station and/or source cell includes information indicating whether the source base station and/or source cell supports RN handover Instructions. 5. The method of claim 1, wherein, The determining whether the target base station and/or the target cell supports RN switching includes: Obtaining the neighbor relationship list from the network operation and management system; Obtain attribute information from the neighbor relationship list; determining whether the target base station and/or the target cell supports RN switching according to the attribute information; Wherein, the attribute information includes indication information for indicating whether the target base station and/or the target cell supports RN handover. 6. The method of claim 1, wherein, The determining whether the target base station and/or the target cell supports RN switching includes: Send an S1 handover request message to the mobility management entity MME; receiving an S1 handover command message sent by the MME, where the S1 handover command message includes type information of a target base station and/or a target cell; determining whether the target base station and/or the target cell supports RN switching according to the type information; Wherein, the type information includes indication information for indicating whether the target base station and/or the target cell supports RN handover. 7. The method of claim 1, wherein, The determining whether the target base station and/or the target cell supports RN switching includes: The source base station receives the measurement report message sent by the RN; determining whether the target base station and/or the target cell supports RN switching according to the measurement report message; Wherein, the measurement report message includes indication information for indicating whether the target base station and/or the target cell supports RN handover. 8. The method according to any one of claims 1 to 7, characterized in that, If the target base station and/or target cell do not support RN switching, the source base station switches the RN according to the user equipment UE switching mode, or the source base station does not switch the RN to the target base station or target cell. 9. A method for controlling switching of relay nodes, comprising: The relay node RN receives a switching command sent by the source base station indicating to switch to the target base station in RN switching mode, wherein the switching command is sent by the source base station after determining that the target base station and/or the target cell support RN switching; The RN performs handover to the target base station in an RN handover mode. 10. The method of claim 9, wherein, Before the relay node RN receives the handover command sent by the source base station indicating to switch to the target base station in the RN handover mode, it also includes: The RN determines whether the target base station and/or the target cell supports RN switching; The RN notifies the source base station whether the target base station and/or the target cell supports RN switching. 11. The method of claim 10, wherein, The notifying the source base station whether the target base station and/or the target cell supports RN switching includes: Sending a measurement report message to the source base station, where the measurement report message carries indication information for indicating whether the target base station and/or the target cell supports RN handover; or, Sending a radio resource control RRC message to the source base station, where the RRC message carries indication information for indicating whether the target base station and/or the target cell supports RN switching; or, Sending an S1 message to the source base station, where the S1 message carries indication information for indicating whether the target base station and/or the target cell supports RN switching; or, Sending an X2 message to the source base station, where the X2 message carries indication information for indicating whether the target base station and/or the target cell support RN handover. 12. A base station, characterized in that it comprises: a determining unit, configured to determine whether the target base station and/or the target cell support relay node RN handover; A switching control unit, configured to switch the RN according to the RN switching mode when the determining unit determines that the target base station and/or the target cell supports RN switching. 13. The base station according to claim 12, characterized in that, The determining unit is specifically configured to acquire type information of the target base station and/or target cell based on the X2 service flow, and determine whether the target base station and/or target cell supports RN handover according to the type information, wherein the type information includes Indication information for indicating whether the target base station and/or the target cell support RN handover; or, The determining unit is used to obtain a neighbor relationship list from a network operation management system; acquire attribute information from the neighbor relationship list; determine whether the target base station and/or target cell support RN handover according to the attribute information, wherein, The attribute information includes indication information for indicating whether the target base station and/or target cell supports RN handover; or, The determining unit is specifically configured to send an S1 handover request message to a mobility management entity MME; receive an S1 handover command message sent by the MME, wherein the S1 handover command message includes type information of a target base station and/or a target cell ; Determine whether the target base station and/or the target cell supports RN switching according to the type information, wherein the type information includes indication information for indicating whether the target base station and/or the target cell supports RN switching; or, The determining unit is specifically configured to receive a measurement report message sent by the RN; and determine whether the target base station and/or the target cell supports RN handover according to the measurement report message, wherein the measurement report message includes information for indicating the target base station And/or indication information of whether the target cell supports RN switching. 14. A relay node, characterized in that it comprises: The receiving unit is configured to receive a switching command sent by the source base station indicating to switch to the target base station in the relay node RN switching mode, wherein the switching command is sent by the source base station after determining that the target base station and/or the target cell support RN switching; The switching unit is configured to switch to the target base station in RN switching mode. 15. The relay node according to claim 14, characterized in that, The relay node also includes: a determining unit, configured to determine whether the target base station and/or the target cell support RN switching; A notification unit, configured to notify the source base station whether the target base station and/or the target cell support RN handover. 16. The relay node according to claim 15, characterized in that, The notification unit includes: The first notification subunit is configured to send a measurement report message to the source base station, where the measurement report message carries indication information for indicating whether the target base station and/or the target cell supports RN switching; or, The second notification subunit is configured to send a radio resource control RRC message to the source base station, where the RRC message carries indication information for indicating whether the target base station and/or the target cell supports RN switching; or, The third notification subunit is configured to send an S1 message to the source base station, where the S1 message carries indication information for indicating whether the target base station and/or the target cell supports RN switching; or, The fourth notification subunit is configured to send an X2 message to the source base station, where the X2 message carries indication information for indicating whether the target base station and/or the target cell supports RN switching. 17. A communication system, characterized in that it comprises: The base station according to any one of claims 12 to 13, or the relay node according to any one of claims 14 to 16.

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