WO2015054865A1

WO2015054865A1 - Handover method, base station, and communications system

Info

Publication number: WO2015054865A1
Application number: PCT/CN2013/085397
Authority: WO
Inventors: 吴联海; 汪巍崴; 李兆俊; 徐海博
Original assignee: 富士通株式会社; 吴联海; 汪巍崴; 李兆俊; 徐海博
Priority date: 2013-10-17
Filing date: 2013-10-17
Publication date: 2015-04-23
Also published as: CN105325034A; CN105325034B

Abstract

A handover method, a base station, and a communications system. The method comprises: a base station serving a user equipment sending a handover request to a target base station, the handover request comprising position information of the user equipment. In this way, after receiving the handover request, the target base station can select a suitable target cell according to the position information of the user equipment and a process of cell splitting or cell merging of the target base station, and feeds back the target cell and configuration information to the base station. In this way, the base station can perform a corresponding handover configuration according to the information fed back by the target base station, thereby avoiding the occurrence of a handover failure.

Description

Switching method, base station and communication system

The present invention relates to the field of communications, and in particular, to a handover method, a base station, and a communication system. Background technique

In Rell2, the introduction of the Dynamic Antenna System (AAS) will be considered.

The base station of the AAS can dynamically adjust the parameters of the antenna group, so that the coverage of the cell can be dynamically changed to meet the service requirements. Cell splitting and cell merging are effective ways for AAS to achieve optimal system capacity.

In 3GPP, the cell division is considered after the cell division means different physical cell identity (PCI, Physical Cell Identity) ₀ cells were combined PCI refers to two different cells into a merged cell, i.e., the inverse process of cell division. The splitting and merging process is a slow process, such as changing once an hour.

It should be noted that the above description of the technical background is only for the purpose of facilitating the clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these solutions are set forth in the background section of the present invention. Summary of the invention

Currently, before the cell splitting or cell merging, the neighbor base station has prepared for handover and sends a handover request to the target base station. The target base station may perform cell splitting and cell merging operations. After receiving the feedback information of the allowed handover of the target base station, the neighboring base station performs handover configuration on the user equipment (UE), and then the UE starts random access in the target cell. If the cell splitting or cell merging occurs in the target cell, the UE may fail to access the random access, causing the handover to fail, thereby triggering the UE to perform the re-establishment. However, the cell may not be successful because the cell has no terminal context.

The embodiments of the present invention provide a handover method, a base station, and a communication system. When cell merging and cell splitting occur in a target cell, the method can ensure successful handover and solve the problems in the prior art.

According to a first aspect of the embodiments of the present invention, a handover method is provided, the method comprising:

The base station serving the user equipment sends a handover request to the target base station, where the handover request includes location information of the user equipment. According to a second aspect of the embodiments of the present invention, a handover method is provided, the method comprising:

The target base station receives a handover request sent by the base station serving the user equipment, where the handover request includes location information of the user equipment;

The target base station selects a suitable target cell for the user equipment according to the location information and the cell splitting or combining progress;

The selected target cell and handover configuration information are fed back to the base station.

According to a third aspect of the embodiments of the present invention, a base station is provided, where the base station includes:

And a request sending unit, configured to send a handover request to the target base station, where the handover request includes location information of the user equipment.

According to a fourth aspect of the embodiments of the present invention, a base station is provided, where the base station includes:

a request receiving unit, configured to receive a handover request sent by a base station serving the user equipment, where the handover request includes location information of the user equipment;

a cell selection unit, configured to select a suitable target cell for the user equipment according to the location information, and a cell splitting or combining progress;

And an information sending unit, configured to feed back the selected target cell and the switching configuration information to the base station.

According to a fifth aspect of the embodiments of the present invention, there is provided a communication system comprising the base station according to the third aspect and the fourth aspect of the embodiments of the present invention.

According to a sixth aspect of the embodiments of the present invention, a method for triggering a cell change is provided. The method includes: the base station according to an operation and a maintenance entity of the network side according to the load condition of the base station, or the base station according to its own load. The situation triggers the base station to perform cell splitting or cell merging.

According to a seventh aspect of the embodiments of the present invention, a device for triggering a cell change is provided, where the device for triggering a cell change includes:

a first determining unit, configured to determine, according to a load condition of the base station, the base station to perform cell splitting or cell merging;

a first sending unit, configured to send, to the base station, indication information according to the determination result, where the indication information is used to indicate that the base station performs cell splitting or cell merging.

According to an eighth aspect of the embodiments of the present invention, a device for triggering a cell change is provided, where the device for triggering a cell change includes: An information receiving unit, configured to receive trigger information sent by an operation management and maintenance entity on the network side according to a load condition of the base station;

a first unit, where the first processing unit is configured to perform cell splitting or cell merging according to the trigger information. According to a ninth aspect of the embodiments of the present invention, an apparatus for triggering a cell change is provided, where the apparatus for triggering a cell change includes:

a second determining unit, configured to determine, according to a load condition of the base station, the base station to perform cell splitting or cell merging;

a second unit, the second processing unit configured to perform cell splitting or cell merging according to the determined result. According to a tenth aspect of the embodiments of the present invention, there is provided a computer readable program, wherein when the program is executed in a base station, the program causes the computer to perform the first aspect or the second aspect of the embodiment of the present invention in the base station Switching method.

According to an eleventh aspect of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the first aspect or the second aspect of the embodiment of the present invention in a base station Switching method.

According to a twelfth aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in a device that triggers a cell change, the program causes a computer to execute the present in the device that triggers a cell change A method of triggering cell change as described in the sixth aspect of the embodiments of the invention.

According to a thirteenth aspect of the embodiments of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a sixth aspect of an embodiment of the present invention in a device that triggers a cell change The method of triggering a cell change.

The beneficial effects of the embodiments of the present invention are as follows: The target base station can select a suitable target cell for the user terminal (UE) according to the auxiliary information provided by the source base station, and prevent the user terminal from failing due to cell splitting or cell merging of the target base station.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which illustrate the manner in which the principles of the invention can be employed. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. . It should be emphasized that the term "comprising" or "comprising", when used herein, refers to the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

The drawings are included to provide a further understanding of the embodiments of the invention, and are in the Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor. In the drawings: FIG. 1 is a flowchart of a method for triggering a cell change according to Embodiment 1 of the present invention;

2 is a flowchart of a method for triggering cell change according to Embodiment 2 of the present invention;

3 is a flowchart of a method for triggering cell change according to Embodiment 3 of the present invention;

4 is a schematic diagram showing the structure of a device for triggering a cell change according to Embodiment 4 of the present invention;

Figure 5 is a schematic diagram showing the structure of an OAM according to Embodiment 4 of the present invention;

6 is a schematic diagram showing the structure of a device for triggering a cell change according to Embodiment 5 of the present invention;

Figure 7 is a block diagram showing the structure of a base station according to Embodiment 5 of the present invention;

8 is a schematic diagram showing the structure of a device for triggering a cell change according to Embodiment 6 of the present invention;

9 is a flowchart of a handover method according to Embodiment 7 of the present invention;

FIG. 10 is a flowchart of a handover method according to Embodiment 8 of the present invention; FIG.

Figure 11 is a block diagram showing the structure of a base station according to Embodiment 9 of the present invention;

Figure 12 is a block diagram showing the structure of a base station according to Embodiment 10 of the present invention. detailed description

Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

In this embodiment, the base station may trigger the base station to perform cell splitting or cell merging by the OAM. In addition, the base station may also trigger itself to perform cell splitting or cell merging. The method for triggering cell change is described below with reference to the accompanying drawings.

Example 1

1 is a flow chart of a method for triggering a cell change according to Embodiment 1 of the present invention. In this embodiment, the operation tube The OAM, Operations, Administration, and Maintenance triggers as an example. As shown in Figure 1, on the OAM side, the method includes:

In step 101, the OAM determines that the base station performs cell splitting or cell merging according to the load condition of the base station. In this embodiment, when the OAM finds that the load of the base station is relatively serious, the OAM is triggered to perform cell splitting; When the load of the base station is relatively light, the base station is triggered to perform cell merging.

Step 102: Send indication information to the base station according to the determination result, and indicate, by using the indication information, the base station to perform cell splitting or cell merging.

It can be seen from the above embodiment that the OAM can trigger the base station to perform cell splitting or cell merging based on the load condition of the base station.

In addition, in this embodiment, the OAM may send configuration information to the base station, so that the base station uses the configuration information to perform parameter configuration. For example, the configuration information may be a handover trigger parameter, and the base station is configured according to the This configuration information is used to configure the switching parameters.

Example 2

2 is a flow chart of a method of triggering cell change in the present invention 2. The OAM trigger is taken as an example for description. As shown in FIG. 2, on the base station side, the method includes:

Step 201: Receive indication information sent by the OAM, where the indication information is used to indicate that the base station performs cell splitting or cell merging.

Step 202: The base station performs cell splitting or cell merging according to the indication information sent by the OAM.

It can be seen from the foregoing embodiment that the base station can be triggered by the OAM to perform cell splitting or cell merging.

In this embodiment, when the configuration information is also sent when the OAM sends the indication information, the method may further include: receiving configuration information sent by the OAM; the base station uses the configuration information to perform parameter configuration; for example, The configuration information may be a handover trigger parameter, and the base station performs handover parameter configuration according to the configuration information. Similar to the prior art, it will not be described here.

Example 3

FIG. 3 is a flowchart of a method for triggering cell change according to Embodiment 3 of the present invention. The base station triggers the base station to perform cell splitting or cell merging according to its own load condition as an example. As shown in Figure 3,

Step 301: The base station determines, according to its own load condition, that the base station performs cell splitting or cell merging; wherein, when the base station finds that the load is relatively serious, the base station performs cell splitting; when the base station finds that the load is relatively light, performs cell merging. Step 302: Perform cell splitting or cell merging according to the determined result.

It can be seen from the above embodiment that the base station can trigger the base station to perform cell splitting or cell merging according to its own load condition.

In the foregoing Embodiment 2 and Embodiment 3, before the base station performs cell splitting or cell merging, the method further includes: the base station notifying the neighboring base station of information about cell splitting or cell merging, and indicating the state of the cell by using the information;

In this embodiment, the state of the cell may be a cell split state and a cell merge state.

In this way, when the cell status indicated by the information is in a split state, the base station also notifies the neighboring base station of the newly appearing cell, so that the neighboring base station learns the narrowed coverage coverage area and the newly appearing cell according to the information; When the indicated cell status is the merged state, the base station notifies the neighboring base station of the closed cell (the disappeared cell), so that the neighbor base station learns the cell with the expanded coverage and the cell that is turned off.

The foregoing embodiment uses OAM triggering and base station triggering as an example to describe a method for triggering cell change. And the base station performing cell splitting or merging may notify the neighboring base station of the status of the cell.

Example 4

Fig. 4 is a block diagram showing the structure of a device for triggering cell change according to Embodiment 4 of the present invention. On the OAM side, the apparatus 400 for triggering the cell change includes: a first determining unit 401 and a first transmitting unit 402;

The first determining unit 401 is configured to determine, according to the load condition of the base station, that the base station performs cell splitting or cell merging. The specific determining method is as described in Embodiment 1, and details are not described herein again.

The first sending unit 402 is configured to send indication information to the base station according to the determination result, where the indication information indicates that the base station performs cell splitting or cell merging.

In addition, in this embodiment, the OAM may send configuration information to the base station in addition to the indication information, and the first sending unit 402 is further configured to send configuration information to the base station, so that the base station uses the configuration information. Parameter configuration.

In this embodiment, the device 400 that triggers the cell change may work independently to trigger the cell to perform cell splitting or cell merging. In addition, the device 400 for triggering cell change may be OAM, and the OAM triggers the base station to perform cell splitting or Community merger. Thus, the OAM may include the first determining unit 401 and the first transmitting unit 402 in the device 400 that triggers the cell change, and may further include components common to the existing OAM. Fig. 5 is a schematic view showing the structure of an OAM according to a fourth embodiment of the present invention. As shown in FIG. 5, the OAM 500 includes: a first trigger unit 503, that is, the first trigger unit 503 includes a first determining unit 401 and a first transmitting unit 402, which function as described above. In addition, the 0AM 500 further includes a main control circuit 501, a memory 502, a transceiver 504, and an antenna 505; wherein the memory 502 can store the trigger program and execute the program under the control of the main controller 501, and the program executes the process as The description of Embodiment 1 is not repeated here. The functions of other components are similar to those of the prior art and will not be described here. Further, the first trigger unit 503 can be used in combination with the main control circuit 501.

Example 5

Figure 6 is a block diagram showing the structure of a device for triggering cell change according to Embodiment 5 of the present invention. As shown in FIG. 6, the apparatus 600 for triggering a cell change includes: an information receiving unit 601 and a first processing unit 602, where

The information receiving unit 601 is configured to receive the indication information that is sent by the OAM, and the indication information is used to indicate that the base station performs cell splitting or cell merging. The first processing unit 602 is configured to perform cell splitting or cell merging according to the indication information sent by the OAM.

In this embodiment, when the configuration information is also sent when the OAM sends the indication information, the apparatus 600 may further include a configuration information receiving unit and a processing unit (not shown), wherein the configuration information receiving unit is configured to receive The configuration information sent by the OAM, and the processing unit is configured to perform parameter configuration using the configuration information. The parameter configuration process is similar to the prior art and will not be described here. The configuration information receiving unit and the information receiving unit 601, the processing unit may also work independently with the first processing unit 602, or may be used in combination.

In this embodiment, the device 600 that triggers the cell change may work independently as a separate component to trigger the cell to perform cell splitting or cell merging. In addition, the device 600 that triggers the cell change may be the base station itself, and the base station triggers itself. Perform cell splitting or cell merging. Thus, the base station can include an information receiving unit 601 and a first processing unit 602 in the device 600 that triggers cell change. In addition, the base station can also include components common to existing base stations.

Figure 7 is a block diagram showing the structure of a base station according to a fifth embodiment of the present invention. As shown in FIG. 7, the base station 700 includes a second trigger unit 703, and the second trigger unit 703 includes an information receiving unit 601 and a first processing unit 602, which function as described above. In addition, the base station 700 further includes a main control circuit 701, a memory 702, a transceiver 704, and an antenna 705. The memory 702 can store the trigger program and execute the program under the control of the main controller 701. The process of program execution is as described in Embodiment 2, and details are not described herein again. The functions of other components are similar to those of the prior art and will not be described here. Further, the second trigger unit 703 can be combined with the main control circuit 701.

It can be seen from the foregoing embodiment that the base station is triggered by the OAM to perform cell splitting or cell merging.

Example 6

Figure 8 is a block diagram showing the structure of a device for triggering cell change according to Embodiment 6 of the present invention. As shown in FIG. 8, the apparatus 800 for triggering a cell change includes a second determining unit 801 and a second processing unit 802;

The second determining unit 801 is configured to determine, according to its own load condition, that the base station performs cell splitting or cell merging; and the second processing unit 802 is configured to perform cell splitting or cell merging according to the determined result.

In this embodiment, the device 800 that triggers the cell change may work independently as a separate component to trigger the cell to perform cell splitting or cell merging. In addition, the device 800 that triggers the cell change may be the base station itself, and the base station triggers itself. Perform cell splitting or cell merging. Thus, the base station can include a second determining unit 701 and a second processing unit 802 in the transmitting device 800, and can also include components common to existing base stations. Similar to the embodiment 5 shown in FIG. 7, it will not be described again here.

It can be seen from the foregoing embodiment that the base station triggers itself to perform cell splitting or cell merging.

In Embodiment 5 and Embodiment 6, before the first processing unit and the second processing unit perform cell splitting or cell merging, the base station may further include: an information notifying unit (not shown) for using the notification unit The information about the cell splitting or cell merging is notified to the neighboring base station, and the status of the cell is indicated by the information, and the state of the cell is as described above, and details are not described herein again.

In this embodiment, when the UE performs the handover, the target base station may select a suitable target cell for the UE based on the UE location information provided by the source base station, and avoid the handover failure of the UE, which solves the problems in the prior art. The switching method of the embodiment of the present invention will be described below with reference to the accompanying drawings.

Example 7

Figure 9 is a flow chart showing a handover method of Embodiment 7 of the present invention. On the source base station side, the method includes: Step 901: A base station (source base station) serving the user equipment sends a handover request to the target base station, where the handover request includes location information of the user equipment.

In this embodiment, the location information of the user equipment may be reported by the user equipment to the base station, that is, the user equipment may determine its location by using a positioning system, and then report the location information to the base station.

According to the foregoing embodiment, when the target base station generates cell splitting or cell merging, the source base station may forward the location information of the user equipment to the target base station, so that the target base station may select according to the location of the user equipment. A suitable target cell.

After the base station sends the handover request, if the target base station allows handover and has selected a suitable target cell, the target base station feeds back the target cell and configuration information to the base station.

In this way, the method may further include a step 902 and a step 903, receiving a target cell and configuration information that is fed back by the target base station, and according to the information, the target base station is allowed to perform handover, and the base station may be configured according to the configuration information fed back by the target base station. User equipment is configured. For example, the configuration information includes at least handover configuration information, and the configuration information further includes information specified in the current protocol, such as measurement configuration, mobility control, resource configuration, and security configuration for the target cell (refer to the 3GPP protocol document TS36.331 for details). The RRCConnectionReconfiguration (RRC Connection Reconfiguration) is similar to the prior art and will not be described here.

After the base station performs handover configuration on the UE, the user equipment may perform a handover process, and by using the foregoing method, handover failure may be avoided.

In this embodiment, the method may further include: receiving information about cell splitting or cell merging from a neighboring base station including the target base station, and indicating the state of the cell by using the information, so that the base station determines according to the state of the cell. The cell that is narrowed in coverage and the newly appearing cell, or the cell that is expanded in coverage and the cell that is turned off.

Thus, before the target base station performs cell splitting or cell merging, the base station can determine the state of the cell of the target base station based on the above information. In this way, the method may further include: determining, according to the foregoing information, a state of the cell, that is, a split state or a merged state, as described above, and details are not described herein again.

In this case, when the base station sends a handover request to the target base station, the base station sends a corresponding handover request to the different target cells, and sends at least two handover requests; wherein, when the target base station is about to perform cell splitting, The base station separately sends a handover request for the cell with reduced coverage and the newly appearing cell; when the target base station is about to perform cell merging, the base station separately sends a handover request for the cell with the extended coverage and the cell that is turned off.

Example 8

Figure 10 is a flow chart showing the switching method of the eighth embodiment of the present invention. As shown in FIG. 10, the method includes: Step 1001: A target base station receives a handover request sent by a base station served by a user equipment, where the handover request includes location information of the user equipment.

Step 1002: According to the location information of the user equipment, and the cell splitting or merging progress, the user is The device selects a suitable target cell;

In this embodiment, in a scenario where the cell is split, the user equipment is determined to be close to the newly appearing cell according to the location information, and the cell splitting is completed when the user equipment performs random access, and the target base station replaces the new The emerging cell is selected as the target cell;

In the scenario of cell merging, the user equipment is determined to be close to the closed cell according to the location information, and the cell merging is completed when the user equipment performs random access, and the target base station uses the cell with the extended coverage. Selected as the target cell.

Step 1003: The target base station feeds back the selected target cell and configuration information to the base station.

The configuration information is as described in Embodiment 7, and details are not described herein again.

In this embodiment, the target base station may trigger cell splitting or cell merging by itself or by OAM, and the target base station may also notify the cell splitting or cell merging before performing cell splitting or cell merging. The neighboring base station indicates the state of the cell by using the information, so that the neighboring base station learns the cell that is covered by the narrowing range and the newly appearing cell, or learns the cell with the expanded coverage and the cell that is turned off. The specific triggering method and information notification method are not described here as described in Embodiments 1-3. And before step 1002, it is known that it may perform cell splitting or cell merging operations.

In this embodiment, the source base station sends at least two handover requests to the target base station for different target cells, and in step 1001, the target base station may receive the at least two handover requests.

According to the foregoing embodiment, when the target base station is in a cell splitting or cell merging operation, the target base station may select a suitable target cell for the user equipment according to the cell splitting or cell merging progress according to the location information of the user equipment. The problem of UE handover failure in the prior art is solved.

Example 9

Figure 11 is a block diagram showing the structure of a base station according to a ninth embodiment of the present invention. The base station 1100 includes a request sending unit 1101, and the request sending unit 1101 is configured to send a handover request to the target base station, where the handover request includes location information of the user equipment.

According to the foregoing embodiment, the base station (source base station) serving the user equipment may send a handover request to the target base station, where the handover request includes location information of the user equipment, so that the target base station performs cell splitting according to the location information. Or the progress of cell merging selects a suitable target cell for the user equipment.

In this embodiment, after the base station sends the handover request, if the target base station allows handover and has selected a suitable target cell, the target base station feeds back the target cell and configuration information to the base station. The configuration letter The information is as described in Embodiment 7, and will not be described here.

In this way, the base station 1100 can further include a feedback information receiving unit 1102 and a switching configuration unit 1103. The feedback information receiving unit 1102 is configured to receive the target cell and configuration information fed back by the target base station. The switching configuration unit 1103 is configured to learn according to the information. The target base station allows handover, and the base station can configure the user equipment according to the configuration information fed back by the target base station. This configuration process is similar to the prior art and will not be described here.

In this embodiment, the component 1103 is an optional component. When the information fed back by the target base station is information that the handover is not allowed, the target base station feeds back a handover preparation failure message, so that the base station 1100 does not need to switch the configuration unit 1103 to perform handover. Configuration.

In this embodiment, the base station 1100 may further include an information receiving unit 1104 and a third determining unit 1105, where the information receiving unit 1104 is configured to receive information about cell splitting or cell merging from a neighboring base station including the target base station, by using the The information indicates the state of the cell, so that the base station determines the cell with the reduced coverage and the newly appearing cell according to the state of the cell, or determines the cell with the expanded coverage and the cell that is turned off. The third determining unit is configured to determine the state of the cell based on the information.

In this case, when the request sending unit 1101 sends a handover request to the target base station, a corresponding handover request is sent for different target cells;

When the target base station is about to perform cell splitting, the base station separately sends a handover request for the cell with reduced coverage and the newly appearing cell; when the target base station is about to perform cell merging, the base station is for the cell with extended coverage and is closed. The dropped cell sends a corresponding handover request.

In this embodiment, the base station 1100 may be implemented by software, hardware, or a combination thereof. In addition to the foregoing components, the base station 1100 may include technical features common to the existing base station, and is similar to the base station shown in FIG. 7, and details are not described herein again. . The components of the base station 1100 can be combined with the main controller.

In this embodiment, the base station may also trigger the base station to perform cell splitting or cell merging by the OAM, or the base station may trigger itself to perform cell splitting or cell merging, and notify the neighboring base station of the related cell splitting or cell merging information, specifically As described in Embodiments 1-3, details are not described herein again.

According to the foregoing embodiment, the base station (source base station) serving the user equipment may send a handover request to the target base station, where the handover request includes location information of the user equipment, so that the target base station performs cell splitting according to the location information. Or the progress of cell merging selects a suitable target cell for the user equipment. And the base station may further receive information about cell splitting and cell merging sent by the neighboring base station, and send corresponding cuts according to the information. Change the request.

Example 10

Figure 12 is a block diagram showing the structure of a base station according to Embodiment 10 of the present invention. As shown in FIG. 12, the base station 1200 includes a request receiving unit 1201, a cell selecting unit 1202, and an information sending unit 1203. The request receiving unit 1201 is configured to receive a handover request sent by a base station serving the user equipment, where the handover is performed. The request includes the location information of the user equipment; the cell selection unit 1202 is configured to select a target cell for the user equipment according to the location information, and the cell splitting or combining progress; the information sending unit 1203 is configured to feed back the selected target cell and the configuration to the base station. information.

The cell selection unit 1202 performs cell selection as described in step 1002 of Embodiment 8, and details are not described herein. After the base station allows handover and selects a suitable target cell, the information transmitting unit 1203 feeds back the selected target cell and configuration information to the base station.

In this embodiment, the base station 1200 may also trigger the base station to perform cell splitting or cell merging by the OAM, or the base station may trigger itself to perform cell splitting or cell merging, and notify the neighboring base station of related cell splitting or cell merging information. In this way, the base station 1200 may further include a triggering unit, which is configured as described in Embodiment 5 and Embodiment 6, and the content thereof is incorporated herein, and details are not described herein again.

In addition, before the base station 1200 performs cell splitting or cell merging, the base station 1200 may further include a notification unit 1205, where the notification unit 1205 is configured to notify the neighboring base station of information about cell splitting or cell merging, and indicate the state of the cell by using the information, so that The neighboring base station learns the cell that is covered by the narrowing range and the newly appearing cell, or the cell that is informed of the expanded coverage and the cell that is turned off.

According to the foregoing embodiment, the target base station may receive a handover request sent by the source base station, where the handover request includes location information of the user equipment, so that the target base station is the user according to the location information and the progress of cell splitting or cell merging. The device selects a suitable target cell to avoid a handover failure when the target base station performs cell splitting or cell merging operations.

Example 11

The embodiment 11 of the present invention further provides a communication system, which may include a user equipment, a source base station serving the user equipment, and a target base station; wherein the source base station is the base station according to Embodiment 9; The base station described in Embodiment 10 is not described here.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the switching method described in Embodiments 7 and 8 in the base station. Example 12

The embodiment 12 of the present invention further provides a communication system, which may include an OAM and a base station, and the OAM is the OAM as described in Embodiment 3. The base station is the base station according to Embodiment 4, and details are not described herein again.

Example 13

The embodiment 13 of the present invention further provides a communication system, which may include a base station, which is configured as described in Embodiment 3, and details are not described herein again.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the switching method described in Embodiments 7 and 8 in a base station.

Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a base station, the program causes a computer to perform the method of triggering a cell change described in Embodiments 2 and 3 in the base station.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a method of triggering a cell change as described in Embodiments 2 and 3 in a base station.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an OAM, the program causes the computer to execute the method for triggering cell change described in Embodiment 1 in the OAM.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of triggering a cell change described in Embodiment 1 in an OAM.

The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are illustrative and not restrictive. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

claims

1. A switching method, the method includes:

The base station serving the user equipment sends a handover request to the target base station, where the handover request includes the location information of the user equipment.

2. The method according to claim 1, further comprising:

The base station receives information about cell splitting or cell merging from neighboring base stations including the target base station, and indicates the status of the cell through the information, so that the base station determines the reduced coverage area based on the status of the cell. cells and newly emerged cells, or cells whose coverage has been expanded and cells that have been turned off.

3. The method according to claim 2, wherein the method further includes: determining the status of the cell according to the information;

And when the base station sends a handover request to the target base station, the base station sends corresponding handover requests for different target cells; wherein,

When the target base station is about to perform cell splitting, the base station sends corresponding handover requests respectively for the cells with reduced coverage and the newly emerged cells; when the target base station is about to perform cell merging, the base station sends corresponding handover requests for the cells whose coverage is expanded. The cells within the range and the cells that are turned off send corresponding handover requests respectively.

4. A switching method, the method includes:

The target base station receives a handover request sent by a base station serving the user equipment, where the handover request includes the location information of the user equipment;

The target base station selects an appropriate target cell for the user equipment based on the location information and cell splitting or merging progress;

Feedback the selected target cell and handover configuration information to the base station.

5. The method according to claim 4, wherein the target base station selects an appropriate target cell for the user equipment according to the location information and cell splitting or merging progress, including:

When the target base station is about to perform cell splitting, and when it is determined based on the location information that the user equipment is close to a new cell, and the cell splitting is completed when the user equipment performs random access, the target base station will Describe the target community for the newly emerged community;

When the target base station is about to perform cell merging, and when it is determined based on the location information that the user equipment is close to the switched-off cell, and when the user equipment performs random access, the cell merging is completed, the target base station The cell whose coverage is expanded is used as a target cell.

6. The method according to claim 5, wherein the method further includes:

The target base station is triggered to perform cell splitting or cell merging according to the trigger information received from the operation management and maintenance entity on the network side or according to the load condition of the target base station.

7. The method according to claim 6, wherein before the target base station performs cell splitting or cell merging, the method further includes:

Notify neighboring base stations of information about cell splitting or cell merging, and use the information to indicate the status of the cells, so that the neighboring base stations can learn about the cells whose coverage has been reduced and new cells, or learn about the cells whose coverage has been expanded. and closed communities.

8. A base station, the base station includes:

A request sending unit, the request sending unit is used to send a handover request to the target base station, where the handover request contains the location information of the user equipment.

9. The base station according to claim 8, the base station further comprising:

An information receiving unit, the information receiving unit is configured to receive information about cell splitting or cell merging from adjacent base stations including the target base station, and indicate the status of the cell through the information, so that the base station can The status determines the cells whose coverage is reduced and the newly emerged cells, or determines the cells whose coverage is expanded and the cells which are turned off.

10. The base station according to claim 9, wherein the base station further includes:

A third determination unit, the third determination unit is configured to determine the status of the cell according to the information; and when the request sending unit sends a handover request to the target base station, it sends handover requests for different target cells respectively; wherein,

When the target base station is about to perform cell splitting, the base station sends corresponding handover requests for the cells with reduced coverage and new cells; when the target base station is about to perform cell merging, the base station sends corresponding handover requests for the expanded coverage. Send corresponding handover requests to the cell and the switched-off cell.

11. A base station, the base station includes:

A request receiving unit, the request receiving unit is configured to receive a handover request sent by a base station serving the user equipment, where the handover request includes the location information of the user equipment;

A cell selection unit configured to select an appropriate target cell for the user equipment according to the location information and cell splitting or merging progress; An information sending unit, the information sending unit is configured to feed back the selected target cell and handover configuration information to the base station.

12. The base station according to claim 11, wherein the base station further includes:

A triggering unit configured to trigger the base station to perform cell splitting or cell merging according to the triggering information received from the operation management and maintenance entity on the network side or according to the load condition of the base station.

13. The base station according to claim 12, wherein before the target base station performs cell splitting or cell merging, the base station further includes:

Notification unit, the notification unit is used to notify neighboring base stations of information about cell splitting or cell merging, and indicates the status of the cells through the information, so that the neighboring base stations can learn about the cells whose coverage has been reduced and the new cells. , or learn the cells whose coverage has been expanded and the cells that have been turned off.

14. A communication system, comprising the base station according to claim 8 and the base station according to claim 11.

15. A method for triggering cell change, the method includes:

The base station triggers the base station to perform cell splitting or cell merging according to the trigger information sent by the operation management and maintenance entity of the network side according to the load condition of the base station, or the base station triggers the base station according to its own load condition.

16. The method according to claim 15, wherein before the base station performs cell splitting or cell merging, the method further includes:

The base station notifies neighboring base stations of information about cell splitting or cell merging, and indicates the status of the cells through the information, so that the neighboring base stations can learn about the cells whose coverage has been reduced and new cells, or learn about expanded coverage. range of cells and cells that are turned off.

17. A device for triggering cell change. The device for triggering cell change includes:

A first determination unit, the first determination unit is used to determine that the base station performs cell splitting or cell merging according to the load condition of the base station;

The first sending unit is configured to send indication information to the base station according to the determination result, and instruct the base station to perform cell splitting or cell merging through the indication information.

18. A device for triggering cell change. The device for triggering cell change includes:

An information receiving unit, the information receiving unit is used to receive trigger information sent by the operation management and maintenance entity on the network side according to the load condition of the base station;

The first unit: the first processing unit is configured to perform cell splitting or cell merging according to the trigger information.

19. A device for triggering a cell change, the device for triggering a cell change includes: a second determination unit, the second determination unit is used to determine whether the base station performs cell splitting or cell merging according to the load condition of the base station;

The second processing unit is configured to perform cell splitting or cell merging according to the determination result.

20. The device for triggering cell change according to claim 18 or 19, wherein the device for triggering cell change further includes a notification unit, the notification unit is used to notify adjacent base stations of information about cell splitting or cell merging, The status of the cell is indicated through the information, so that the neighboring base station can learn the cells whose coverage has been reduced and the newly appearing cells, or the cells whose coverage has been expanded and the cells which have been turned off.

21. A computer-readable program, wherein when the program is executed in a base station, the program causes the computer to execute the switching method according to any one of claims 1-7 in the base station.

22. A storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the switching method according to any one of claims 1-7 in a base station.

23. A computer-readable program, wherein when the program is executed in a device for triggering a cell change, the program causes the computer to execute the triggering of a cell change according to claim 15 or 16 in the device for triggering a cell change. Methods.

24. A storage medium storing a computer-readable program, wherein the computer-readable program causes the computer to execute the method for triggering cell change according to claim 15 or 16 in the device for triggering cell change.