WO2016154790A1

WO2016154790A1 - Switching control method and apparatus, and communication system

Info

Publication number: WO2016154790A1
Application number: PCT/CN2015/075209
Authority: WO
Inventors: 赵静
Original assignee: 华为技术有限公司
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2016-10-06
Also published as: CN106664629A; CN106664629B

Abstract

Provided are a switching control method and apparatus, and a communication system. A controller can collect a network state of each radio access device connected thereto, and use same as a node for switching decision. When switching needs to be performed on a certain UE, a radio access device which provides a service to the UE will perform measurement configuration on the UE, and send a measurement report and a reason for switching the trigger to the controller, so that the controller, in conjunction with the network state of each radio access device, preliminarily evaluates whether a target cell in the measurement report is suitable for receiving the UE, so as to perform switching decision. Thus, the accuracy of switching decision can be greatly improved.

Description

Switching control method, device and communication system

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a handover control method, apparatus, and communication system.

Background technique

In the field of communication technology, mobile communication has brought great convenience to users with its mobility advantage, and has achieved rapid development. In a mobile communication system, a user equipment (UE) often moves from the coverage of one cell to the coverage of another cell during the mobile process. In this case, the UE needs to be switched to another A cell to guarantee the communication quality of the UE. In addition, when the UE is in an area where two cells overlap, a handover to the UE may also occur in order to balance the service. For example, in two cells, one load is higher, and the other load is lower, so that the load can be compared. Some UEs in a high cell perform handover and switch it to a cell with a lower load. It can be seen that in mobile communication systems, switching is a very common and very critical technology.

Please refer to FIG. 1 , which is a schematic diagram of an existing handover procedure. As shown in Figure 1, the existing handover process usually includes the following steps:

S101: The source base station sends a measurement configuration to the UE. For example, the measurement type of the UE may be configured by using a Radio Resource Control (RRC) connection reconfiguration message.

S102: The UE completes the local measurement configuration according to the measurement configuration delivered by the source base station, and returns a measurement configuration complete message to the source base station. For example, the RRC connection reconfiguration complete message is used to notify the source base station that the measurement configuration is complete.

S103: The UE reports a measurement report to the source base station according to the measurement configuration.

S104: The source base station performs a handover decision according to the measurement report, and determines that the UE needs to be handed over to the target base station.

S105: The source base station sends a handover request message to the target base station, indicating that the target base station performs handover preparation.

S106: The target base station performs resource admission, and allocates air interface resources and bearer resources of the service for the access of the UE;

S107: After the target base station resource is successfully admitted, send a handover request acknowledge message to the source base station, indicating that the handover preparation work is completed.

S108: The source base station instructs the UE to perform handover. For example, the RRC connection reconfiguration message may be sent to the UE to instruct the UE to perform handover.

S109: After the UE successfully accesses the target cell, the UE informs the target base station that the handover process is complete. For example, the UE sends an RRC connection reconfiguration complete message to the target base station, and confirms that the handover process is completed to the target base station.

S110: The target base station sends a request message to a core network (CN) device, requesting to update a node address of the service data channel.

S111: After updating the data channel node address, the CN device sends an acknowledgement message to the target base station, indicating that the service communication can be performed on the new bearer.

S112: The UE has access to the target cell, and can perform service communication in the target cell. At this time, the target base station instructs the source base station to release the resources and the context of the UE.

S113: The source base station releases the context and resources of the UE.

In the above handover process, information transmission between the source base station and the target base station may be directly transmitted between the two base stations when there is an interface for direct communication between the two base stations; when there is no direct communication interface between the two base stations, CN pass. Moreover, the above switching can be used for the same system switching, and can also be used for switching between different systems. Regardless of whether it is used for the same system handover or the different system handover, the handover decision is performed in the source base station. It can be seen that the active authority of the handover decision is at the source base station, and the handover strategy between the target base station and the source base station may be different, or The target base station cannot meet the handover requirement caused by the service demand of the UE, or the target base station quickly unloads the UE, or switches the UE back to the ping-pong phenomenon of the source base station.

It can be seen that the existing handover control is inaccurate, which may cause problems such as handover failure, ping-pong and so on.

Summary of the invention

In view of this, the embodiments of the present invention provide a handover control method, apparatus, and communication system to improve the accuracy of handover control.

In a first aspect, a handover control method is provided for controlling handover of a UE in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller , the method includes:

The controller acquires a network status of each wireless access device;

The controller receives the measurement report reported by the first radio access device and the handover trigger reason, where the first radio access device is a radio access device of the UE to be switched;

The controller performs a handover decision according to the network status of each of the wireless access devices, the measurement report, and a trigger cause of the handover;

Transmitting a handover decision result or a handover indication to the first radio access device, where the handover decision result or handover indication is used to indicate whether to switch the UE, and/or, when the UE is switched, The handover decision result or handover indication is used to indicate the target cell of the handover.

In a first possible implementation manner of the first aspect, the network status of each wireless access device includes a load status.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the load status includes a load status of each radio access device or a load of a cell of each radio access device status.

In conjunction with the first or second possible implementation of the first aspect, in a third possible implementation of the first aspect, the method further includes:

The controller acquires a neighbor relationship of each wireless access device;

The controller determines, according to the load status of each wireless access device and the neighbor relationship, at least one candidate cell for each wireless access device;

Notifying the radio access device of the candidate cell for each radio access device, so that the first radio access device configures the user equipment to perform measurement on the candidate cell of the first radio access device to obtain the measurement report.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the controller is configured for each wireless connection according to a network state and a neighbor relationship of each wireless access device. The ingress device determines at least one candidate cell, including:

Determining a neighboring cell of the current radio access device according to a neighboring cell relationship of the current radio access device, where the current radio access device is any one of the multiple radio access devices to determine a radio connection of the candidate cell Into the device;

Obtaining, from the load status of each wireless access device, a load status of a neighboring cell of the current wireless access device;

Selecting a candidate cell of the current wireless access device according to a load status of a neighboring cell of the current wireless access device.

In conjunction with the third or fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the candidate cell includes one or all of a co-prepared candidate cell and a heterogeneous candidate cell.

With reference to one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the network state further includes a network behavior, where the network behavior includes a network behavior of the network And/or network behavior from the outside world.

With reference to the first aspect, or one of the first to the sixth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the multiple wireless access devices have the same network standard , or, different network standards.

In a second aspect, a handover control method is provided for controlling handover of a UE in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller , the method includes:

The first wireless access device reports its network status to the controller, where the first wireless The access device is a wireless access device of the UE to be switched;

The first wireless access device performs measurement configuration on the UE;

Receiving, by the first radio access device, the measurement report reported by the UE according to the measurement configuration, and reporting the measurement report and the trigger trigger reason to the controller, so that the controller is configured according to the first radio access device And performing a handover decision with a network status of the other wireless access device, the measurement report, and a trigger cause of the handover;

Receiving, by the first radio access device, a handover decision result or a handover indication sent by the controller, where the handover decision result or handover indication is used to indicate whether to switch the UE, and/or when the UE is used When the handover is performed, the handover decision result or the handover indication is used to indicate the target cell of the handover;

The first radio access device performs handover control on the UE according to the handover decision result or a handover indication.

In a first possible implementation manner of the second aspect, the network status of each wireless access device includes a load status.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the load status includes a load status of each radio access device or a load of a cell of each radio access device status.

In conjunction with the first or second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, before the first radio access device performs measurement configuration on the UE, the method further includes:

The first wireless access device reports its neighbor relationship to the controller, so that the controller is configured for each wireless according to the load status and neighbor relationship of the first wireless access device and other wireless access devices. The access device determines at least one candidate cell;

Receiving, by the first radio access device, a candidate cell that is sent by the controller and determined by the first radio access device;

And the first wireless access device performs measurement configuration on the UE, including:

The first radio access device configures a candidate for the first radio access device by the UE The cell performs measurements.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the candidate cell includes one or all of the same candidate candidate cell and the heterogeneous candidate cell.

With reference to the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the network state further includes a network behavior, where the network behavior includes its own network behavior and External network behavior.

With reference to the second aspect, or one of the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation manner of the second aspect, the multiple wireless access devices have the same network standard , or, different network standards.

In a third aspect, a handover control apparatus is provided for controlling handover of a UE in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller The switching control device is located at the controller and includes an obtaining unit and a switching decision unit, wherein:

The acquiring unit is configured to acquire a network state of each wireless access device;

The acquiring unit is further configured to acquire a measurement report reported by the first radio access device and a handover triggering cause, where the first radio access device is a radio access device of the UE to be switched;

The handover decision unit is configured to perform a handover decision according to the network state of each of the wireless access devices, the measurement report, and a trigger cause of the handover, and send a handover decision result or a handover indication to the first wireless connection In the device, the handover decision result or the handover indication is used to indicate whether to switch the UE, and/or, when the UE is handed over, the handover decision result or the handover indication is used to indicate the target cell of the handover. .

In a first possible implementation manner of the third aspect, the network status of each wireless access device includes a load status.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the load status includes a load status of each wireless access device or each wireless access The load status of the cell of the device.

In conjunction with the first or second possible implementation of the third aspect, in a third possible implementation of the third aspect, the apparatus further includes a determining unit, wherein:

The acquiring unit is further configured to acquire a neighbor relationship of each wireless access device;

The determining unit is configured to determine, according to a load status and a neighbor relationship of each radio access device, at least one candidate cell for each radio access device; and send, to each radio access device, a candidate cell determined for the radio access device, So that the first radio access device configures the UE to perform measurement on a candidate cell of the first radio access device to obtain the measurement report.

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, the determining unit is configured to perform the following operations to determine a candidate cell of each radio access device:

With reference to the third or fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the candidate cell includes one or all of a same-type candidate cell and a heterogeneous candidate cell.

With reference to one of the first to fifth possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the network state further includes a network behavior, where the network behavior includes a network behavior of the network And network behavior from the outside world.

With reference to the third aspect, or one of the first to the sixth possible implementation manners of the third aspect, in the seventh possible implementation manner of the third aspect, the multiple wireless access devices have the same Network standard, or, different network standards.

A fourth aspect provides a handover control apparatus for controlling handover of a UE in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller The switching control device is located in any wireless access device and includes:

a reporting unit, configured to report, to the controller, a network status of the first wireless access device where the first wireless access device is located, where the first wireless access device is a wireless access device of the UE to be switched;

a configuration unit, configured to perform measurement configuration on the UE;

An acquiring unit, configured to acquire a measurement report reported by the UE according to the measurement configuration;

The reporting unit is further configured to report the measurement report and the trigger trigger reason to the controller, so that the controller is configured according to the network status of the first wireless access device and other wireless access devices, and the measurement Reporting and triggering of the handover, and making a handover decision;

a handover control unit, configured to receive a handover decision result or a handover indication sent by the controller, and perform handover control on the UE according to the handover decision result or a handover indication, where the handover decision result or handover indication And configured to indicate whether the UE is handed over, and/or, when the UE is handed over, the handover decision result or the handover indication is used to indicate a target cell of the handover.

In a first possible implementation manner of the fourth aspect, the network status of each wireless access device includes a load status.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the load status includes a load status of each radio access device or a load of a cell of each radio access device status.

In conjunction with the first or second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the reporting unit is further configured to: before the configuration unit performs measurement configuration on the UE, the reporting unit is further configured to:

Reporting a neighbor relationship of the first radio access device to the controller, so that the controller according to the load status and the neighbor relationship of the first radio access device and other radio access devices, Determining at least one candidate cell for each wireless access device;

And the configuration unit is configured to: receive a candidate cell that is sent by the controller and that is determined by the first radio access device, and configure the UE to perform measurement on a candidate cell of the first radio access device.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the candidate cell includes one or all of the same candidate candidate cell and the heterogeneous candidate cell.

With reference to the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the network status further includes a network behavior, where the network behavior includes its own network behavior and External network behavior.

With reference to the fourth aspect, or one of the first to fifth possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the multiple wireless access devices have the same network standard , or, different network standards.

In a fifth aspect, a communication system is provided, comprising: a controller, a plurality of wireless access devices connected to the controller, wherein the controller comprises any of the possible implementations of the third aspect or the third aspect above One of the devices, each of the wireless access devices comprising one of the above fourth aspect or one of the possible implementations of any of the fourth aspects.

It can be seen that in the above switching control method, device and communication system, the controller can collect the network status of each wireless access device connected thereto and serve as a node for handover decision. When a handover needs to be performed on a certain UE, the radio access device that provides the UE performs the measurement configuration on the UE, and reports the measurement report and the triggering reason of the handover to the controller, so that the controller combines the radio accesses. The network status of the device, initially evaluating whether the target cell in the measurement report is suitable for receiving the UE, and then performing a handover decision. In this way, the accuracy of the handover judgment can be greatly improved.

And the controller may further select a candidate cell for each wireless access device according to the network state of the wireless access device, so that each wireless access device performs measurement configuration only on its candidate cell, so that the measurement resource of the UE may be saved, thereby Greatly improve the throughput of the UE.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic diagram of an existing handover procedure;

2 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

FIG. 3 is a signaling flow diagram of a handover control method according to an embodiment of the present invention;

FIG. 4 is a flowchart of a handover control method according to an embodiment of the present invention;

FIG. 5 is a flowchart of a method for selecting a candidate cell by a controller according to an embodiment of the present invention;

FIG. 6 is a flowchart of another handover control method according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a handover control apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another switching control apparatus according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a controller according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another switching control apparatus according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a wireless access device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be described with reference to the accompanying drawings, which are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

With the rapid development of mobile communications, network standards continue to evolve, and various types of communication systems exist in the existing network. For example, the current network standards for mobile communication include, for example, the fourth generation (4G). Wireless network standard, for example, Long Term Evolution (LTE); third generation (3G) wireless network standard, for example, Universal Mobile Telecommunications System (UMTS); second generation (2G) wireless network standard For example, Global System for Mobile communications (GSM)/Enhanced Data Rates for Global Evolution (EDGE) radio access network (RAN), referred to as GSM/GERAN, and Wifi network, etc. The UE will perform intra-standard handover (also called intra-system handover) or inter-system handover (also called inter-system handover) within or between these networks due to various reasons such as coverage, load, and user experience. ).

At present, the decisions of these handovers are all performed in the source base station of the UE, and the ping-pong phenomenon often occurs because the target base station cannot meet the service requirements of the UE. For example, when the LTE network is congested, the LTE network switches the UE to the 2G network when the 2G network is lightly loaded, and the UMTS network can similarly switch the UE to the 2G network; the 2G network is quickly congested, and then the UE is started to be uninstalled. . For another example, because the handover strategies of the LTE network and the UMTS network are different, the LTE network may decide to switch the UE to the UMTS network, and the UMTS network decides to switch the UE to the LTE network, so that convection generates ping-pong.

At present, the solution to the above problem is simply to let the source base station obtain some state information of the target base station through a limited way to increase the accuracy of the handover decision, but still cannot effectively solve the ping-pong problem of the handover process.

The present application considers the above problem, and the network states of multiple radio access devices in an area are grouped together. Further, when a UE served by a certain radio access device needs to be handed over, according to the measurement report and handover reported by the UE. The triggering reason (also referred to as the triggering cause of the measurement) and the above-mentioned centralized network state are used to make a handover decision. Since the network status of other radio access devices and the triggering cause of the handover are considered in the handover decision, it may be initially evaluated whether the target cell in the measurement report is suitable for receiving the UE, for example, whether the UE can be provided with a service that meets its service requirements. When the target cell is initially evaluated to be suitable for receiving the UE, the handover of the UE is triggered, thereby improving The accuracy of the handover decision is reduced, and the problems of handover failure, ping-pong and the like are reduced.

The network status of the wireless access device may include a load status, and may refer to a network status of the wireless access device itself, or may be a network status of a cell covered by the wireless access device. In this way, the load of the wireless access device or the load of the cell to which the wireless access device belongs can be utilized to determine whether it still has the capability to provide services for the newly cut-in UE. For example, the load status may be a definition of a direct load status (eg, light load, congestion, etc.), and an indication information may be set, the different values representing different load states; when the load status indicates that the wireless access device is in a congested state In this case, the wireless access device is not suitable for providing services for other UEs. In this case, when the handover decision is made, it is determined that the UE is not handed over to the cell where the wireless access device is located. For example, the load status may also include load information of the number of users of the radio access device itself or the cell it covers, the absolute value of the channel resource, or the resource utilization; when the load information indicates that the load of the wireless access device exceeds the preset When the value is set, the wireless access device is in a congested state, and is not suitable for providing services to other UEs. In this case, when the handover decision is made, it is determined that the UE is not handed over to the cell where the wireless access device is located.

In addition, the network status of the above wireless access device may also include network behavior, which may include its own network behavior and network behavior from the outside. For example, the network behavior of the network may be whether the wireless access device is also performing UE migration. When it is also performing UE migration, it is generally not suitable for receiving a new UE, and according to the network behavior, when the handover is determined, It is determined that the UE is not handed over to the cell in which the wireless access device is located. For example, when the cell of the radio access device is blocked and the link is interrupted, it is generally not suitable for receiving a new UE. In this case, according to the network behavior, it is determined that the UE is not switched to the radio access device. Community. The network behavior from the outside world may be other network devices, such as other wireless access devices and CN devices, etc., the network behavior of the wireless access device, for example, in the case of CN load rebalancing or CN overload, the CN notifies the The wireless access device is overloaded, and the wireless access device starts to release the UE connected to the CN. At this time, the wireless access device is not suitable for receiving a new UE. In this case, the UE may be determined not to be based on the network behavior. Switch to the cell where the wireless access device is located.

In addition, the controller may use the above centralized network state to pre-screen each radio access device with the same co-preparation candidate cell with the same standard, or filter each radio access device with a heterogeneous candidate cell different from its standard. In this way, the radio access device can perform handover configuration only for the same-type candidate cell or the heterogeneous candidate cell, and the UE can perform measurement only for the configured cell according to the handover configuration. In this way, before the handover decision is made, the screening is performed at the source of the target cell, which further improves the accuracy of the handover decision. Moreover, the number of cells measured by the UE is further reduced, the size of the measurement report is reduced, and air interface resources are saved.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

1) A wireless access device is a device that accesses a UE to a wireless network, including but not limited to: an evolved Node B (eNB), a radio network controller (RNC), and a node. B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Wifi access Point (AP), etc. In addition, the wireless access device may also be a BaseBand Unit (BBU).

2) The controller is used for coordinating and controlling a plurality of wireless access devices, which may be an independently set device, having a wired or wireless interface for connecting with multiple wireless access devices; or being integrated in a device The device in, for example, is integrated in a wireless access device, and the wireless access device can be wired or wirelessly connected to other wireless access devices, and coordinate and control itself and other wireless access devices. In addition, in a scenario where the BBU is deployed in a centralized manner, multiple radio access devices are BBUs deployed by the base station, and the controllers may be independently connected devices connected to the BBUs, or may be devices integrated on a certain BBU.

3) The UE, also known as a terminal, is a device that provides voice and/or data connectivity to users, for example, a handheld device with wireless connectivity, and other processing connected to a wireless modem. Equipment, etc.

4) "Multiple" means two or more. "and/or", describing the association of associated objects, It is indicated that there may be three kinds of relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. The character "/" generally indicates that the contextual object is an "or" relationship.

Several embodiments will be described in detail below in conjunction with the drawings to make the above aspects clear.

Please refer to FIG. 2 , which is a schematic structural diagram of a communication system according to an embodiment of the present invention. As shown in FIG. 2, the communication system includes a controller 210 and a plurality of wireless access devices 221 22 22N, wherein N is a positive integer greater than or equal to 2, and the wireless access devices 221 22 22N are all connected to the controller 210. In this embodiment, the wireless access devices 221 22 22N are directly connected to the controller 210 as an example, but the connection manner is not limited thereto. The wireless access device may also be indirectly connected to the controller, for example, connected to the controller through other devices, and the other device may also be a wireless access device. In addition, the connection method can also be a wired connection or a wireless connection. In short, the present application does not limit the connection manner as long as the communication between the wireless access device and the controller can be implemented.

In the communication system, the controller 210 acts as a node for handover decision, and can acquire the network status of each wireless access device connected thereto. When a handover needs to be performed on a certain UE, the radio access device (for example, the radio access device 221) that provides the UE performs measurement configuration on the UE, so that the UE measures the neighboring area and reports the measurement report. The wireless access device 221 reports the measurement report and the triggering reason of the handover to the controller 210, so that the controller 210 initially determines whether the target cell in the measurement report is suitable for receiving the UE, according to the network status of each wireless access device. Make a handover decision.

The handover procedure in the above communication system will be described below with reference to the accompanying drawings.

Please refer to FIG. 3, which is a signaling flow diagram of a handover control method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:

S301: The wireless access device 1 to N report the network status to the controller.

Optionally, the controller may initially select, for each radio access device, a candidate cell that may serve as a handover target according to the received network status. For the screening, the controller may pre-store the neighbor relationship of each radio access device. . Since the neighborhood relationship is variable, preferably, The wireless access device may report the neighbor relationship to the controller together with the network status in the foregoing step S301, or report the neighbor relationship to the controller separately. Make any restrictions. Of course, the initial neighbor relationship may be pre-stored by the controller. When the neighbor relationship changes, the wireless access device reports the changed neighbor relationship.

In this embodiment, the wireless access devices 1 to N report the network status and the neighbor relationship at the same time as an example. At this time, the information reported by the radio access devices 1 to N in the above step S301 further includes a neighbor relationship. Then, the controller can determine a candidate cell for each wireless access device according to the network state and neighbor relationship of each wireless access device. For example, when the network status includes the load status, the controller may select a light-loaded cell as a candidate cell for each wireless access device, and may set a load threshold to filter a cell whose load is less than or equal to the load threshold as a candidate cell. The candidate cell of each radio access device is the object of handover measurement when there is a UE in the radio access device that needs to be handed over. At this time, the above methods also include:

S302: The controller determines a candidate cell for each radio access device according to a network state and a neighbor relationship of each radio access device.

S303: The controller notifies each radio access device of the candidate cell determined for it. In this way, when a certain radio access device has a UE that needs to be handed over, the UE can be configured to perform measurement on its candidate cell to obtain a measurement report to determine whether to perform handover.

When a radio access device has a UE that needs to be handed over, the measurement configuration may be performed only for the candidate cell. Here, the method for the radio access device 1 to be switched by the UE is described as an example.

S304: The radio access device 1 sends a measurement configuration to the UE, instructing the UE to perform measurement on its candidate cell.

If the controller does not filter the cell, that is, the above method does not report the neighbor relationship in step 301, and does not include the above steps 302 and 303, when the radio access device 1 has the UE to switch, the measurement configuration is still sent. Only configured measurement targets are more, for example, prior art The medium measurement target can be configured as a frequency point or a cell. Taking 10 frequency points or 10 cells as an example, according to the triggering reason, the wireless access device 1 filters out several cells, for example, filtering out 3 cells, and remaining 7 cells. And configured to measure for the UE. Through the steps of the above controller filtering, more cells can be further filtered out, for example, 3 cells are further filtered out, so that only 4 cell configurations are left for the UE to perform measurement. Each time a cell is configured, the measurement resources of the UE can be saved, thereby greatly improving the throughput rate of the UE.

S305: The UE reports the measurement report according to the measurement configuration sent by the wireless access device 1.

Certainly, the step of the UE performing the local measurement configuration and returning the measurement configuration completion message to the wireless access device 1 may also be performed, which is the same as the prior art and will not be described herein.

S306: The wireless access device 1 forwards the measurement report to the controller, and reports the triggering cause of the handover (also referred to as the triggering cause of the measurement) to the controller.

S307: The controller performs a handover decision according to a network state of each wireless access device, a measurement report, and a trigger cause of the handover.

For example, the controller calculates, according to the measurement report and the network status, data that the UE feels at the throughput rate or delay jitter that the UE can obtain in the target cell, and performs handover decision according to the data.

S308: The controller sends the handover decision result to the wireless access device 1, so that the wireless access device 1 determines whether to perform handover or handover to which cell according to the result; or the controller directly sends a handover indication according to the result, and is used to indicate the wireless Whether the access device 1 performs handover or handover to which cell.

It can be seen that the controller can directly send the handover decision result to the wireless access device 1, or generate a handover indication according to the handover decision result, to send the handover indication to the wireless access device 1, wherein the handover decision result or the handover indication is used to indicate Whether to perform handover on the UE, and when switching to the UE line, the target cell of the handover may also be indicated, or may be directly used to indicate the target cell of the handover.

After the radio access device 1 learns the handover decision result or the handover indication, the handover can be performed, and the handover is performed in the prior art, and details are not described herein again.

It should be noted that the network state of the above wireless access device may refer to the network state of the cell of the wireless access device. When the wireless access device deploys multiple cells, that is, multiple cells of the wireless access device network status. Similarly, the neighbor relationship of the wireless access device may also refer to the neighbor relationship of the cell of the wireless access device. The candidate cell determined for the radio access device may also refer to the candidate cell of each cell of the radio access device.

It can be seen that the embodiment of the present invention provides a handover control method as shown in FIG. 4, which is used to control handover of a UE in a wireless communication system. As shown in FIG. 2, the wireless communication system includes multiple wireless accesses. Devices, and these wireless access devices are connected to the controller. The following methods are performed by the controller:

S410: Acquire a network state of each wireless access device.

S420: Receive a measurement report reported by the first radio access device, and a handover trigger cause, where the first radio access device is a radio access device of the UE to be switched;

S430: Perform a handover decision according to a network state of each radio access device, a measurement report reported by the first radio access device, and a trigger cause of the handover.

S440: Send a handover decision result or a handover indication to the first radio access device, where the handover decision result or the handover indication is used to indicate whether to switch the UE, and/or, when the UE is switched, the handover decision result or The handover indication is used to indicate the target cell of the handover. That is, the handover decision result or the handover indication is used to indicate whether to perform handover on the UE, and when the UE is handed over, the handover decision result or the handover indication is further used to indicate the target cell of the handover. Alternatively, the handover decision result or the handover indication may be used to indicate whether to switch the UE. When the UE is handed over, the handover target or the handover indication may be used to indicate the target cell to be handed over.

It can be known from the above description that the network status of each wireless access device may include the load status of each wireless access device, and the load status may be the self-load status of each wireless access device, or may be the The load status of the cell. In addition, the network of each wireless access device The network state may also include network behavior, which may include its own network behavior, and may also include network behavior from the outside world.

In addition, the foregoing measurement report is that the UE obtains and reports the measurement configuration of the UE according to the first radio access device to the first radio access device. The controller may filter the target cell of the handover by using the acquired network state in advance to select at least one candidate cell and notify the first wireless access device. In this way, the first radio access device can perform measurement configuration only on the candidate cell, thereby saving measurement resources of the UE and greatly improving the throughput rate of the UE.

Please refer to FIG. 5 , which is a flowchart of a method for selecting a candidate cell by a controller according to an embodiment of the present invention. As shown in FIG. 5, the method includes:

S510: Determine a neighboring cell of the current radio access device according to a neighboring cell relationship of the current radio access device, where the current radio access device is any one of the multiple radio access devices to be determined to be a candidate cell. Access device

S520: Obtain a load status of a neighboring cell of the current wireless access device from a load status of each wireless access device.

S530: Select a candidate cell of the current radio access device according to a load status of a neighboring cell of the current radio access device.

For example, a neighboring cell whose load status is light load is selected as a candidate cell of the current wireless access device; or a neighboring cell whose load is lower than or equal to a preset threshold is selected as a candidate cell of the current wireless access device.

As can be seen from the above description, a plurality of wireless access devices may have the same network standard or different network standards. And the candidate cell may include the same candidate cell, and may also include a heterogeneous candidate cell. The same type candidate cell is used for intra-standard handover, and the heterogeneous candidate cell is used for inter-standard handover.

In addition, an embodiment of the present invention provides a handover control method as shown in FIG. 6, which is used to control handover of a UE in a wireless communication system. As shown in FIG. 2, the wireless communication system includes multiple wireless accesses. Devices, and these wireless access devices are connected to the controller. By any pending The first wireless access device of the UE performs the following methods:

S610: Report, to the controller, a network status of the first wireless access device.

S620: Perform measurement configuration on the UE.

S630: Receive a measurement report reported by the UE according to the measurement configuration, and report the measurement report and the trigger trigger reason to the controller, so that the controller determines the network status according to the first wireless access device and other wireless access devices, and the measurement Reporting and triggering of the handover, and making a handover decision;

S640: Receive a handover decision result or a handover indication sent by the controller, where the handover decision result or the handover indication is used to indicate whether to switch the UE, and/or, when the UE is switched, the handover decision result or the handover indication is used for The target cell indicating the handover; that is, the handover decision result or the handover indication is used to indicate whether to switch the UE, and when the UE is handed over, the handover decision result or the handover indication is further used to indicate the target cell of the handover. Alternatively, the handover decision result or the handover indication may be used to indicate whether to switch the UE. When the UE is handed over, the handover target or the handover indication may be used to indicate the target cell to be handed over.

S650: Perform handover control on the UE according to the foregoing handover decision result or handover indication.

For example, when the handover decision result or the handover indication indicates whether to perform handover on the UE, the UE may be handed over according to the indication or the UE is reserved in the source cell, and no handover is performed. For another example, when the handover result or the handover indication indicates the target cell of the handover, the UE is handed over to the target cell.

With the above embodiment, the network status reported in the above step S610 may include a load status, and the first wireless access device may report the neighbor relationship to the controller, so that the first wireless access device performs the measurement configuration on the UE. The controller determines, according to the load status and the neighbor relationship of the first radio access device and the other radio access device, at least one candidate cell for each radio access device, and notifies the determined candidate cell to the first radio interface. The candidate cell determined by the device. At this time, in the foregoing step S620, the first radio access device may configure the UE to perform measurement only on the candidate cell of the first radio access device.

The above switching control method is separately described in the controller and the wireless access device with reference to the accompanying drawings. Implementation.

Please refer to FIG. 7 , which is a schematic structural diagram of a handover control apparatus according to an embodiment of the present invention. The device is used in a communication system as shown in Figure 2 and is located in the controller. As shown in FIG. 7, the apparatus 700 includes an obtaining unit 710 and a handover decision unit 720. The acquiring unit 710 is configured to acquire a network state of each radio access device, and is further configured to acquire a measurement report reported by the first radio access device and a handover trigger reason, where the first radio access device is a UE to be switched. Wireless access device. The handover decision unit 720 is configured to perform a handover decision according to the network state of each radio access device, the measurement report acquired by the obtaining unit 710, and the triggering cause of the handover, and send the handover decision result or the handover indication to the first radio access device, The handover decision result or the handover indication is used to indicate whether to perform handover on the UE, and when the UE is handed over, the handover decision result or the handover indication is further used to indicate the target cell of the handover. Alternatively, the handover decision result or the handover indication may be used to indicate whether to handover the UE, and when the UE is handed over, the handover target result may be indicated by only using the handover decision result or the handover indication.

The network status of each of the wireless access devices may include a load status of each wireless access device. In this case, the foregoing obtaining unit 710 may acquire a network of each wireless access device from an interface that communicates with each wireless access device by using the controller. status. In addition, the network status of each of the above wireless access devices may also include network behavior, for example, network behavior of each wireless access device itself and network behavior from the outside. The obtaining unit 710 may obtain the network behavior of each wireless access device itself from an interface that communicates with each wireless access device by using the controller. For the network behavior from the outside, the obtaining unit 710 may be from the performer of the network behavior. Obtained, also available from each wireless access device. For example, when the CN overload notification informs the wireless access device that the UE is released, the acquiring unit 710 can obtain the network behavior from the outside device from the CN device. Of course, the network from the outside world can also be obtained directly from the wireless access device. behavior.

In addition, the above load state may be a load state of each radio access device itself, or may be a load state of a cell of each radio access device.

Please refer to FIG. 8 , which is another structure of a switching control apparatus according to an embodiment of the present invention. schematic diagram. It differs from FIG. 7 in that the apparatus further includes a determining unit 730. The obtaining unit 710 is further configured to acquire a neighbor relationship of each radio access device, and the determining unit 730 is configured to determine, according to the load status and the neighbor relationship of each radio access device, at least one candidate cell for each radio access device. And sending, to each radio access device, a candidate cell determined for the radio access device, so that the first radio access device configures the UE to perform measurement on the candidate cell of the first radio access device to obtain a measurement report.

The obtaining unit 710 may acquire a neighbor relationship of each wireless access device from an interface that is communicated by the controller with each wireless access device. And the neighbor relationship can be reported to the controller by the wireless access device together with the load status. For example, when the neighbor relationship of each wireless access device is updated, the updated neighbor relationship or the updated neighboring area may be reported to the controller for the obtaining unit 710 to obtain.

The determining unit 730 can perform the operations shown in FIG. 5 to determine the candidate cell of each radio access device. For details, refer to the foregoing embodiment, and details are not described herein again. In addition, the description about the state of the network is the same as the above embodiment, and details are not described herein again.

It should be noted that each of the above units may be a separately set processor, or may be integrated into one processor of the controller, or may be stored in the memory of the controller in the form of program code, by the controller. One of the processors calls and executes the functions of each of the above units. In addition, the individual units can be integrated or implemented independently. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

For example, please refer to FIG. 9 , which is a schematic structural diagram of a controller according to an embodiment of the present invention. As shown in FIG. 9, the controller includes a processor 910, a memory 920, and an interface circuit 930, wherein the processor 910, the memory 920, and the interface circuit 930 are connected by a bus 940 and complete communication with each other, and the interface circuit 930 is used for In communication with each of the above wireless access devices, the memory is used to store the program.

The processor 910 calls a program stored in the memory 920 to execute the switching control method performed by any of the above controllers, for example, to perform the following operations:

Obtaining, by the interface circuit 930, the network status of each wireless access device; and obtaining, by the interface circuit 930, the measurement report reported by the first wireless access device, and the handover trigger reason, where the first wireless access device is a wireless connection of the UE to be switched Into the device;

And performing a handover decision according to the network state of each radio access device, the foregoing measurement report, and the triggering reason of the handover; and transmitting a handover decision result or a handover indication to the first radio access device, where the handover decision result or the handover indication is used to indicate Whether to switch the UE, and/or, when the UE is handed over, the handover decision result or the handover indication is used to indicate the target cell of the handover. That is, the handover decision result or the handover indication is used to indicate whether to perform handover on the UE, and when the UE is handed over, the handover decision result or the handover indication is further used to indicate the target cell of the handover. Alternatively, the handover decision result or the handover indication may be used to indicate whether to handover the UE, and when the UE is handed over, the handover target result may be indicated by only using the handover decision result or the handover indication.

In addition, the processor 910 may further: obtain a neighbor relationship of each wireless access device; determine at least one candidate cell for each wireless access device according to a load status and a neighbor relationship of each wireless access device; The radio access device determines the candidate cell for the first radio access device to configure the UE to measure the candidate cell of the first radio access device to obtain the measurement report. The selection method of the candidate cell is the same as the above embodiment, and details are not described herein again.

It should be noted that the processor 910 herein may be a processor or a collective name of multiple processing elements. For example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital singnal processors (DSPs), or One or more Field Programmable Gate Arrays (FPGAs).

The memory 920 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And The memory 920 may include random access memory (RAM), and may also include non-volatile memory such as a magnetic disk memory, a flash memory, or the like.

The bus 940 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus 940 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.

The controller can also include input and output devices that can provide an operator with an input and/or output interface that is coupled to bus 940 for connection to other portions, such as processor 910, via a bus.

Please refer to FIG. 10 , which is a schematic structural diagram of another switching control apparatus according to an embodiment of the present invention. The device is used in a communication system as shown in Figure 2 and is located in any wireless access device. As shown in FIG. 10, the apparatus 100 includes a reporting unit 101, a configuration unit 102, an obtaining unit 103, and a switching control unit 104. The reporting unit 101 is configured to report the network status of the first wireless access device in which the first wireless access device is located, where the first wireless access device is a wireless access device of the UE to be switched, and the configuration unit 102 is configured to measure the UE. The configuration unit 103 is configured to obtain a measurement report that is reported by the UE according to the measurement configuration of the configuration unit 102. The reporting unit 101 reports the measurement report obtained by the obtaining unit 103 and the trigger triggering reason to the controller, so that the controller is configured according to the first wireless access. The network state of the device and the other wireless access device, the measurement report, and the triggering cause of the handover, the handover decision is performed; the handover control unit 104 is configured to receive a handover decision result or a handover indication sent by the controller, and according to the handover decision result or The handover instruction performs handover control for the UE. The handover decision result or handover indication is used to indicate whether to handover the UE, and/or, when the UE is handed over, the handover decision result or the handover indication is used to indicate the target cell of the handover. That is, the handover decision result or the handover indication is used to indicate whether to perform handover on the UE, and when the UE is handed over, the handover decision result or the handover indication is further used to indicate the target cell of the handover. Alternatively, the handover decision result or the handover indication may be used to indicate whether to perform handover on the UE, and when the UE is handed over, the handover decision result or the handover indication may be used to indicate the handover. Target cell.

In the above embodiment, each wireless access device may also report its neighbor relationship, so that the controller selects a candidate cell for each wireless access device according to the neighbor relationship and the network state of each wireless access device. At this time, the reporting unit 101 is further configured to report the neighbor relationship of the first wireless access device to the controller, so that the controller is configured according to the load status and the neighbor relationship of the first wireless access device and other wireless access devices. Each radio access device determines at least one candidate cell; and the configuration unit 102 is configured to receive a candidate cell that is sent by the controller for the first radio access device, and configure the UE to select a candidate cell of the first radio access device. Make measurements.

It should be noted that the reporting unit 101 can report relevant information to the controller through an interface between the wireless access device and the controller, for example, a network status, a measurement report, a trigger cause of the handover, and a neighbor relationship. The obtaining unit 103 can acquire a measurement report from the UE through an antenna. The handover control unit 104 may receive a handover decision result or a handover indication sent by the controller through an interface between the wireless access device and the controller.

In addition, each of the above units may be a separately set processor, or may be implemented in one processor of the wireless access device, or may be stored in the memory of the controller in the form of program code, by the controller. A processor calls and executes the functions of each of the above units. In addition, the individual units can be integrated or implemented independently. The processor described herein can be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.

For example, please refer to FIG. 11 , which is a schematic structural diagram of a wireless access device according to an embodiment of the present invention. As shown in FIG. 11, the wireless access device includes a processor 111, a memory 112, a first interface circuit 113, and a second interface circuit 114, wherein the processor 111, the memory 112, the first interface circuit 113, and the second interface circuit 114 is connected and completes communication with each other via bus 115, and first interface circuit 113 is used to communicate with the controller, second interface circuit 114 is used to communicate with the UE, and memory is used to store the program.

The processor 111 calls a program stored in the memory 112 to execute any of the above wireless access devices. The switch control method that is executed, for example, performs the following operations:

Reporting the network status to the controller through the first interface circuit 113;

Perform measurement configuration on the UE;

Receiving, by the second interface circuit 114, the measurement report reported by the UE according to the measurement configuration, and reporting the measurement report and the trigger trigger reason to the controller, so that the controller can report the reported report according to the network status of each wireless access device. And the triggering reason of the handover, and the handover decision is performed;

Receiving, by the first interface circuit 113, a handover decision result or a handover indication sent by the controller, where the handover decision result or the handover indication is the same as the foregoing embodiment, for indicating whether to switch the UE, and/or, when the UE is switched, a target cell for indicating handover;

The handover control of the UE is performed according to the handover decision result or the handover indication.

In addition, the first interface circuit 113 can also be used to report the neighbor relationship to the controller, so that the controller selects a candidate cell for each wireless access device according to the neighbor relationship and the network state of each wireless access device, so that each wireless connection The ingress device only needs to perform measurement configuration on these candidate cells.

It can usually be connected to RF components such as antennas to achieve communication with the UE.

It should be noted that the processor 111 herein may be a processor or a collective name of multiple processing elements. For example, the processor can be a CPU, an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more DSPs, or one or more FPGAs.

The memory 112 may be a storage device or a collective name of a plurality of storage elements, and is used to store executable program code or parameters, data, and the like required for the operation of the access network management device. And the memory 112 may include a RAM, and may also include a non-volatile memory such as a disk memory, a flash memory, or the like.

The bus 115 can be an ISA bus, a PCI bus, or an EISA bus. The bus 115 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

The wireless access device can also include input and output devices to provide an operator with an input and/or output interface that is coupled to bus 115 for connection to other portions, such as processor 111, via a bus. In addition, a radio frequency component such as an antenna may be included, and is connected to the above second interface circuit 114 to implement communication with the UE.

The following is an example of switching between modes and switching between standards.

Switching within the system:

The wireless access devices in the same system respectively report the network status to the controller periodically or evently. The network status may include the load status of the device, the behavior of the device (eg, whether the UE is also being transferred), and the network behavior of other network devices for it. After receiving the measurement report reported by the UE, each radio access device reports the measurement report and the triggering reason of the handover to the controller. After receiving the measurement report of a certain wireless access device C, the controller combines the triggering reason of the handover with the network state, for example, the load state of the target wireless access device D and the device behavior (for example, whether the UE is also transferring), The other device determines the device behavior of the target radio access device D, and comprehensively determines whether to grant the handover to the measurement report reported by the radio access device C, and delivers the determination result to the radio access device C. The wireless access device receives the decision result, and the switching result is issued by the decision result of the handover.

Taking the LTE network as an example, the different wireless access devices periodically report the state of the network and the neighbor relationship to the controller, and the network state may include the load status of the cell, and may also include each radio resource in each UE. The average throughput rate that the unit can obtain, and the neighbor relationship may include the adjacent relationship of the coverage of the different radio access device cells of the LTE. The controller periodically selects a relatively idle neighboring LTE cell for each radio access device according to the network status and the neighbor relationship reported by the LTE different radio access device, and notifies each radio access device of the selection result.

The UE initiates a video service on one of the wireless access devices of the LTE. The LTE radio access device determines that the throughput of the video service does not meet the condition, and further sends a measurement configuration to the UE, where the measurement configuration range is in a relatively idle neighboring LTE radio access device cell given by the controller.

The UE reports the measurement report to the LTE radio access device; the LTE radio access device reports the measurement report and the triggering cause of the handover (for example, the throughput of the video service does not satisfy the condition) to the controller. The controller calculates, according to the measurement report, whether the video service can obtain a higher throughput rate in the neighboring radio access device cell, and returns the determination result to the LTE radio access device. The LTE radio access device determines whether to perform handover to the neighboring radio access device and the UE according to the decision result sent by the controller. For example, if the decision result sent by the controller is that the neighboring radio access device cell can obtain a higher throughput rate, the handover request is initiated to the neighboring radio access device, and the handover request acknowledgement of the neighboring radio access device is received. Afterwards, the handover command is sent to the UE. After receiving the handover command, the UE performs handover of the neighboring wireless access device, and the video service obtains a higher throughput rate after switching to the adjacent wireless access device cell.

Switch between systems:

Each type of wireless access device periodically or periodically triggers a report to the controller of the network status, for example, load status, network behavior. The network behavior may include its own network behavior, such as whether UE transfer is also being performed, and network behavior from the outside, such as other network standards for its ongoing network behavior. After receiving the measurement report reported by the UE, the wireless access device of each system reports the measurement report and the triggering reason of the handover to the controller. After receiving the measurement report of a certain system A, the controller combines the triggering reason of the handover and the wireless network state of the target system B to comprehensively determine whether to permit the switching of the measurement report reported by the system A, and transmit the judgment result to the system. A. The system that receives the decision result is aligned with the decision result of the handover to issue a handover command.

Taking the handover between the LTE and UMTS systems as an example, the wireless access devices of each system periodically report the state of the network and the neighbor relationship to the controller. The network status may include a load status of the cell, and may also include an average throughput rate that each UE can acquire at each radio resource unit; the neighbor relationship may include an LTE radio access cell and a UMTS radio access cell on the coverage. Adjacent relationship. The controller periodically selects relatively idle neighboring UMTS cells for the LTE-based cell according to the network state and the neighbor relationship reported by the LTE and the UMTS. The cell of the UMTS system selects relatively idle neighboring LTE cells, and notifies the selection result to the wireless access devices of the respective standards.

A UE initiates a video service on an LTE network. The LTE radio access device determines that the throughput of the video service does not meet the condition; and the LTE radio access device sends the measurement configuration to the UE, and the measurement configuration range is in the relatively idle neighboring UMTS cell given by the controller. . The UE performs measurement according to the measurement configuration and reports the measurement report to the LTE wireless access device. The LTE radio access device reports the measurement report and the trigger cause of the handover (for example, the throughput of the video service does not satisfy the condition) to the control. The controller calculates, according to the measurement report, whether the video service can obtain a higher throughput rate in the UMTS neighboring area, and returns the determination result to the LTE wireless access device. The LTE radio access device determines whether to perform handover to the core network and the UE according to the decision result sent by the controller. For example, the result of the decision sent by the controller is that a higher throughput rate can be obtained in the UMTS neighboring cell, and the handover preparation is initiated to the core network. After receiving the handover command of the core network, the handover command is sent to the UE. After receiving the handover command, the UE performs handover to the UMTS neighboring cell, and the video service obtains a higher throughput rate after switching to the UMTS cell.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware implementation, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave from a website, server, or other For remote source transmission, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated medium.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

A handover control method for controlling handover of a user equipment in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller, the method include:

The controller acquires a network status of each wireless access device;

The controller receives the measurement report reported by the first radio access device and the handover trigger reason, where the first radio access device is a radio access device of the user equipment to be switched;

The controller performs a handover decision according to the network status of each of the wireless access devices, the measurement report, and a trigger cause of the handover;

Transmitting a handover decision result or a handover indication to the first radio access device, where the handover decision result or handover indication is used to indicate whether to switch the user equipment, and/or when the user equipment is switched The handover decision result or the handover indication is used to indicate the target cell of the handover.
The method of claim 1 wherein the network status of each of the wireless access devices comprises a load status.
The method of claim 2, wherein the load status comprises a load status of each wireless access device or a load status of a cell of each wireless access device.
The method of claim 2 or 3, further comprising:

The controller acquires a neighbor relationship of each wireless access device;

The controller determines, according to the load status of each wireless access device and the neighbor relationship, at least one candidate cell for each wireless access device;

Notifying the radio access device of the candidate cell for each radio access device, so that the first radio access device configures the user equipment to perform measurement on the candidate cell of the first radio access device to obtain the measurement report.
The method according to claim 4, wherein the controller determines at least one candidate small for each wireless access device according to a network state and a neighbor relationship of each wireless access device. District, including:

Determining a neighboring cell of the current radio access device according to a neighboring cell relationship of the current radio access device, where the current radio access device is any one of the multiple radio access devices to determine a radio connection of the candidate cell Into the device;

Obtaining, from the load status of each wireless access device, a load status of a neighboring cell of the current wireless access device;

Selecting a candidate cell of the current wireless access device according to a load status of a neighboring cell of the current wireless access device.
The method according to claim 4 or 5, wherein the candidate cell comprises one or all of a co-prepared candidate cell and a heterogeneous candidate cell.
The method of any of claims 2 to 6, wherein the network status further comprises network behavior, the network behavior comprising its own network behavior and/or network behavior from the outside.
The method according to any one of claims 1 to 7, wherein the plurality of wireless access devices have the same network standard or different network standards.
A handover control method for controlling handover of a user equipment in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller, the method include:

The first wireless access device reports its network status to the controller, where the first wireless access device is a wireless access device of the user equipment to be switched;

The first wireless access device performs measurement configuration on the user equipment;

Receiving, by the first wireless access device, the measurement report reported by the user equipment according to the measurement configuration, and reporting the measurement report and the trigger triggering reason to the controller, so that the controller is configured according to the first wireless access Performing handover decisions on the network status of the device and other wireless access devices, the measurement report, and the triggering cause of the handover;

Receiving, by the first wireless access device, a handover decision result or a handover finger sent by the controller The handover decision result or the handover indication is used to indicate whether to switch the user equipment, and/or, when the user equipment is switched, the handover decision result or the handover indication is used to indicate the target of the handover. Community

The first radio access device performs handover control on the user equipment according to the handover decision result or the handover indication.
The method of claim 9, wherein the network status of each of the wireless access devices comprises a load status.
The method of claim 10, wherein the load status comprises a load status of each wireless access device or a load status of a cell of each wireless access device.
The method of claim 10 or 11, wherein before the first wireless access device performs measurement configuration on the user equipment, the method further includes:

The first wireless access device reports its neighbor relationship to the controller, so that the controller is configured for each wireless according to the load status and neighbor relationship of the first wireless access device and other wireless access devices. The access device determines at least one candidate cell;

Receiving, by the first radio access device, a candidate cell that is sent by the controller and determined by the first radio access device;

And the first wireless access device performs measurement configuration on the user equipment, including:

The first radio access device configures the user equipment to perform measurement on a candidate cell of the first radio access device.
The method of claim 12, wherein the candidate cell comprises one or both of a co-prepared candidate cell and a heterogeneous candidate cell.
The method according to any one of claims 10 to 13, wherein the network state further comprises network behavior, the network behavior including its own network behavior and network behavior from the outside.
The method according to any one of claims 9 to 14, wherein the plurality of wireless access devices have the same network standard or different network standards.
A switching control apparatus is configured to control switching of a user equipment in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller, and the switching control The device is located at the controller and includes an acquisition unit and a handover decision unit:

The acquiring unit is configured to acquire a network state of each wireless access device;

The acquiring unit is further configured to acquire a measurement report reported by the first wireless access device, and a handover triggering cause, where the first wireless access device is a wireless access device of the user equipment to be switched;

The handover decision unit is configured to perform a handover decision according to the network state of each of the wireless access devices, the measurement report, and a trigger cause of the handover, and send a handover decision result or a handover indication to the first wireless connection In the device, the handover decision result or the handover indication is used to indicate whether to switch the user equipment, and/or, when the user equipment is switched, the handover decision result or the handover indication is used to indicate the handover. Target cell.
The apparatus of claim 16, wherein the network status of each of the wireless access devices comprises a load status.
The apparatus of claim 17, wherein the load status comprises a load status of each wireless access device or a load status of a cell of each wireless access device.
The apparatus according to claim 17 or 18, further comprising a determining unit, wherein:

The acquiring unit is further configured to acquire a neighbor relationship of each wireless access device;

The determining unit is configured to determine, according to a load status and a neighbor relationship of each radio access device, at least one candidate cell for each radio access device; and send, to each radio access device, a candidate cell determined for the radio access device, The first wireless access device is configured to configure the user equipment to perform measurement on a candidate cell of the first wireless access device to obtain the measurement report.
The apparatus of claim 19, wherein the determining unit is configured to perform the following operations to determine candidate cells for each wireless access device:

Determining a neighboring cell of the current radio access device according to a neighboring cell relationship of the current radio access device, where the current radio access device is any one of the multiple radio access devices to determine a radio connection of the candidate cell Into the device;

Obtaining, from the load status of each wireless access device, a load status of a neighboring cell of the current wireless access device;

Selecting a candidate cell of the current wireless access device according to a load status of a neighboring cell of the current wireless access device.
The apparatus according to claim 19 or 20, wherein the candidate cell comprises one or all of a co-prepared candidate cell and a heterogeneous candidate cell.
The apparatus according to any one of claims 17 to 21, wherein the network status further comprises network behavior, the network behavior including its own network behavior and network behavior from the outside.
The apparatus according to any one of claims 16 to 22, wherein the plurality of wireless access devices have the same network standard or different network standards.
A switching control apparatus is configured to control switching of a user equipment in a wireless communication system, wherein the wireless communication system includes a plurality of wireless access devices, and the plurality of wireless access devices are connected to a controller, and the switching control The device is located on any wireless access device and includes:

a reporting unit, configured to report, to the controller, a network status of the first wireless access device where the first wireless access device is located, where the first wireless access device is a wireless access device of the user equipment to be switched;

a configuration unit, configured to perform measurement configuration on the user equipment;

An obtaining unit, configured to acquire a measurement report reported by the user equipment according to the measurement configuration;

The reporting unit is further configured to report the measurement report and the trigger trigger reason to the controller, so that the controller is configured according to the network status of the first wireless access device and other wireless access devices, and the measurement Reporting and triggering of the handover, and making a handover decision;

a handover control unit, configured to receive a handover decision result or a handover indication sent by the controller, and perform handover control on the user equipment according to the handover decision result or a handover indication, The handover decision result or the handover indication is used to indicate whether to switch the user equipment, and/or, when the user equipment is switched, the handover decision result or the handover indication is used to indicate the target of the handover. Community.
The apparatus of claim 24, wherein the network status of each of the wireless access devices comprises a load status.
The apparatus of claim 25, wherein the load status comprises a load status of each wireless access device or a load status of a cell of each wireless access device.
The device according to claim 25 or 26, wherein the reporting unit is further configured to: before the configuration unit performs measurement configuration on the user equipment:

Reporting a neighbor relationship of the first wireless access device to the controller, so that the controller is configured for each wireless according to a load status and a neighbor relationship of the first wireless access device and other wireless access devices The access device determines at least one candidate cell;

And the configuration unit is configured to: receive a candidate cell that is sent by the controller and that is determined by the first radio access device, and configure the user equipment to perform measurement on a candidate cell of the first radio access device.
The apparatus according to claim 27, wherein said candidate cell comprises one or all of a co-prepared candidate cell and a heterogeneous candidate cell.
The apparatus according to any one of claims 25 to 28, wherein the network status further comprises network behavior, the network behavior including its own network behavior and network behavior from the outside.
The apparatus according to any one of claims 24 to 29, wherein the plurality of wireless access devices have the same network standard or different network standards.
A communication system, comprising: a controller, a plurality of wireless access devices connected to the controller, wherein the controller comprises the device according to any one of claims 16 to 23, each wireless connection The in-device includes the apparatus of any one of claims 24 to 30.