CN106664629B

CN106664629B - Switching control method, device and communication system

Info

Publication number: CN106664629B
Application number: CN201580042444.4A
Authority: CN
Inventors: 赵静
Original assignee: Zhuji Yuanchang Information Technology Consulting Service Department
Current assignee: Zhuji Zhicheng Business Agent Co.,Ltd.
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2020-07-10
Anticipated expiration: 2035-03-27
Also published as: CN106664629A; WO2016154790A1

Abstract

The embodiment of the invention provides a switching control method, a switching control device and a communication system. Wherein, the controller can collect the network state of each wireless access device connected with the controller and can be used as a node for switching decision. When a certain UE needs to be switched, the radio access device serving the UE performs measurement configuration on the UE, and reports a measurement report and a trigger reason for switching to the controller, so that the controller preliminarily evaluates whether a target cell in the measurement report is suitable for receiving the UE in combination with a network state of each radio access device, and further performs a switching decision. Therefore, the accuracy of switching judgment can be greatly improved.

Description

Switching control method, device and communication system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a switching control method, a switching control device and a communication system.

Background

In the field of communication technology, mobile communication brings great convenience to users with its mobility advantage, and has rapidly developed. In a mobile communication system, a User Equipment (UE) often moves from a coverage area of one cell to a coverage area of another cell during a moving process, and at this time, the UE needs to be handed over to another cell to ensure communication quality of the UE. In addition, when the UE is in an area where two cells overlap, handover of the UE for balancing traffic may also occur, for example, one of the two cells has a higher load, and the other has a lower load, so that handover may be performed on a part of the UEs in the cell with the higher load, and the UEs may be handed over to the cell with the lower load. It can be seen that handover is very common and critical technology in mobile communication systems.

Please refer to fig. 1, which is a schematic diagram of a conventional handover process. As shown in fig. 1, the conventional handover procedure generally includes the following steps:

s101: a source base station issues measurement configuration to a UE, for example, a measurement type of the UE may be configured through a Radio Resource Control (RRC) connection reconfiguration (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 completion message to the source base station, for example, notifies the source base station of completion of the measurement configuration through an RRC connection reconfiguration complete (RRC connection reconfiguration complete) message;

s103: the UE reports a measurement report (measurement report) to a source base station according to measurement configuration;

s104: the source base station carries out switching judgment according to the measurement report and determines that the UE needs to be switched to the target base station;

s105: a source base station sends a handover request message to a target base station to indicate the target base station to carry out handover preparation;

s106: the target base station performs resource access and allocates air interface resources and service bearing resources for the access of the UE;

s107: after the target base station successfully admits the resources, sending a handover request acknowledgement (handover request acknowledge) message to the source base station to indicate that the handover preparation work is completed;

s108: the source base station instructs the UE to perform handover, for example, an 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 procedure is completed, for example, the UE sends an RRC connection reconfiguration complete message to the target base station, and confirms that the handover procedure is completed to the target base station.

S110: a target base station sends a request message to Core Network (CN) equipment to request to update a node address of a service data channel;

s111: after the CN equipment updates the data channel node address, sending a confirmation message to the target base station to indicate that service communication can be carried out on the new bearer;

s112: the UE has access to the target cell and can carry out service communication in the target cell, and at the moment, the target base station instructs the source base station to release the resource and the context of the UE;

s113: the source base station releases the context and resources of the UE.

In the above switching process, the information transfer between the source base station and the target base station can be directly transferred between the two base stations when the two base stations have interfaces for direct communication; when there is no interface for direct communication between two base stations, it is passed through CN. Moreover, the above handover can be used for intra-system handover or inter-system handover. The switching judgment is carried out in the source base station no matter the switching is used for the same system switching or the different system switching, and therefore, the switching failure caused by the reason that the switching strategy of the target base station is different from that of the source base station, or the target base station cannot meet the service requirement of the UE and the like may occur when the active authority of the switching judgment is in the source base station, or the target base station unloads the UE quickly, or the ping-pong phenomenon that the UE is switched back to the source base station may occur.

Therefore, the existing switching control is inaccurate, and the problems of switching failure, ping-pong and the like can be caused.

Disclosure of Invention

In view of this, embodiments of the present invention provide a handover control method, a handover control device and a communication system, so as to improve 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, where 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 the network state of each wireless access device;

the method comprises the steps that a controller receives a measurement report reported by first wireless access equipment and a switching trigger reason, wherein the first wireless access equipment is the wireless access equipment of UE to be switched;

the controller carries out switching judgment according to the network state of each wireless access device, the measurement report and the triggering reason of switching;

and sending a switching judgment result or a switching indication to the first wireless access equipment, wherein the switching judgment result or the switching indication is used for indicating whether to switch the UE, and/or when the UE is switched, the switching judgment result or the switching indication is used for indicating a target cell for switching.

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 wireless access device or a load status of a cell of each wireless access device.

With reference to the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the method further includes:

the controller acquires the adjacent cell relation of each wireless access device;

the controller determines at least one candidate cell for each wireless access device according to the load state and the adjacent cell relation of each wireless access device;

the controller informs each wireless access device of the determined candidate cells, so that the first wireless access device configures the user equipment to measure the candidate cells of the first wireless 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 determining, by the controller, at least one candidate cell for each radio access device according to the network state and the neighboring cell relation of each radio access device includes:

determining the neighboring cell of the current wireless access equipment according to the neighboring cell relation of the current wireless access equipment, wherein the current wireless access equipment is the wireless access equipment of any candidate cell to be determined in the plurality of wireless access equipment;

acquiring the load state of the neighboring cell of the current wireless access equipment from the load state of each wireless access equipment;

and selecting a candidate cell of the current wireless access equipment according to the load state of the adjacent cell of the current wireless access equipment.

With reference to the third or fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the candidate cells include one or all of candidate cells of the same standard and candidate cells of a different standard.

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, and the network behavior includes a network behavior of itself and/or a network behavior from the outside.

With reference to the first aspect or one of the first to sixth possible implementation manners of the first aspect, in a 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, where 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 equipment reports the network state of the first wireless access equipment to the controller, wherein the first wireless access equipment is the wireless access equipment of the UE to be switched;

the first wireless access equipment performs measurement configuration on the UE;

the first wireless access equipment receives a measurement report reported by the UE according to the measurement configuration, and reports the measurement report and a switching trigger reason to a controller, so that the controller can carry out switching judgment according to the network states of the first wireless access equipment and other wireless access equipment, the measurement report and the switching trigger reason;

the first wireless access equipment receives a switching judgment result or a switching indication sent by the controller, wherein the switching judgment result or the switching indication is used for indicating whether to switch the UE, and/or when the UE is switched, the switching judgment result or the switching indication is used for indicating a switched target cell;

and the first wireless access equipment executes switching control on the UE according to the switching judgment result or the switching 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 wireless access device or a load status of a cell of each wireless access device.

With reference to the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, before the performing, by the first radio access device, measurement configuration on the UE, the method further includes:

the first wireless access equipment reports the adjacent cell relation to the controller so that the controller determines at least one candidate cell for each wireless access equipment according to the load states and the adjacent cell relation of the first wireless access equipment and other wireless access equipment;

the first wireless access equipment receives a candidate cell which is sent by the controller and determined for the first wireless access equipment;

and the first radio access equipment performs measurement configuration on the UE, including:

the first wireless access equipment configures the UE to measure the candidate cells of the first wireless access equipment.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the candidate cells include one or all of candidate cells of the same standard and candidate cells of a different standard.

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, and the network behavior includes a network behavior of itself and a network behavior from the outside.

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, where the wireless communication system includes a plurality of wireless access devices, the plurality of wireless access devices are connected to a controller, and the handover control apparatus is located in the controller and includes an obtaining unit and a handover decision unit, where:

the acquiring unit is used for acquiring the network state of each wireless access device;

the acquiring unit is further configured to acquire a measurement report and a handover trigger reason, which are reported by a first radio access device, where the first radio access device is a radio access device of a UE to be handed over;

the switching decision unit is used for making switching decision according to the network state of each wireless access device, the measurement report and the triggering reason of switching; and sending 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 handover the UE, and/or when to handover the UE, the handover decision result or the handover indication is used to indicate a target cell for 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 a load status of a cell of each wireless access device.

With reference to the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the apparatus further includes a determining unit, where:

the acquiring unit is further configured to acquire a neighboring cell relationship of each wireless access device;

the determining unit is configured to determine at least one candidate cell for each radio access device according to the load state and the neighboring cell relationship of each radio access device; and sending the candidate cells determined for each wireless access device to each wireless access device, so that the first wireless access device configures the UE to measure the candidate cells of the first wireless access device to obtain the measurement report.

With reference to the third possible implementation manner 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 wireless 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 cells include one or all of candidate cells of the same standard and candidate cells of a different standard.

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, and the network behavior includes a network behavior of itself and a network behavior from the outside.

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

In a fourth aspect, a handover control apparatus is provided for controlling handover of a UE in a wireless communication system, where 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 handover control apparatus is located in any wireless access device and includes:

a reporting unit, configured to report a network state of a first radio access device where the first radio access device is located to the controller, where the first radio access device is a radio access device of a UE to be handed over;

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

an obtaining unit, configured to obtain 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 handover trigger reason to a controller, so that the controller performs a handover decision according to the network states of the first radio access device and the other radio access devices, the measurement report, and the handover trigger reason;

and a handover control unit, configured to receive a handover decision result or a handover indication sent by the controller, and execute handover control on the UE according to the handover decision result or the handover indication, where the handover decision result or the handover indication is used to indicate whether to perform handover on the UE, and/or when performing handover on the UE, the handover decision result or the handover indication is used to indicate a target cell for 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 wireless access device or a load status of a cell of each wireless access device.

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

reporting the neighboring cell relation of the first wireless access device to the controller, so that the controller determines at least one candidate cell for each wireless access device according to the load states and the neighboring cell relations of the first wireless access device and other wireless access devices;

and the configuration unit is configured to: and receiving the candidate cell determined for the first wireless access equipment and sent by the controller, and configuring the UE to measure the candidate cell of the first wireless access equipment.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the candidate cells include one or all of candidate cells of the same standard and candidate cells of a different standard.

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 state further includes a network behavior, and the network behavior includes a network behavior of itself and a network behavior from the outside.

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, which includes a controller and a plurality of wireless access devices connected to the controller, where the controller includes the apparatus according to one of the above third aspect or any possible implementation manner of the third aspect, and each wireless access device includes the apparatus according to one of the above fourth aspect or any possible implementation manner of the fourth aspect.

Therefore, in the above handover control method, apparatus and communication system, the controller may collect the network status of each wireless access device connected thereto, and use the network status as a node for handover decision. When a certain UE needs to be switched, the radio access device serving the UE performs measurement configuration on the UE, and reports a measurement report and a trigger reason for switching to the controller, so that the controller preliminarily evaluates whether a target cell in the measurement report is suitable for receiving the UE in combination with a network state of each radio access device, and further performs a switching decision. Therefore, the accuracy of switching judgment can be greatly improved.

And the controller can 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 only performs measurement configuration on the candidate cell, thus the measurement resources of the UE can be saved, and the throughput rate of the UE is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic diagram of a conventional handover procedure;

fig. 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 switching 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 invention;

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

fig. 10 is a schematic structural diagram of another switching control device 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

To make the objects, technical solutions and advantages of the present invention clearer, technical solutions in embodiments of the present invention will be described below with reference to the accompanying drawings, where the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

For example, the current network System of Mobile communication includes a fourth generation (4G) wireless network System, such as long Term Evolution (L ong Term Evolution, L TE), a third generation (3G) wireless network System, such as Universal Mobile Telecommunications System (UMTS), a second generation (2G) wireless network System, such as Global System for Mobile communications (GSM)/Enhanced Data rates for GSM Evolution (EDGE) wireless access network (radio access network, RAN, GSM/GERAN, Wifi network, etc. UE may perform intra-System switching (or inter-System switching) in these networks or between networks for various reasons, such as coverage, load, user experience, etc.

For example, L TE network is congested, when a L TE network learns that a 2G network is lightly loaded, the UE is switched to the 2G network, a UMTS network can also switch the UE to the 2G network similarly, the 2G network is congested soon, and then unloading UE. is started again, for example, because the switching strategies of the L TE network and the UMTS network are different, the L TE network may decide to switch the UE to the UMTS network, and the UMTS network decides to switch the UE to the L TE network, so that ping-pong occurs to the flow.

At present, the approach for solving the above problems is only to let the source base station obtain some state information of the target base station through a limited approach to increase the accuracy of the handover decision, but the ping-pong problem of the handover process still cannot be effectively solved.

In view of the above problems, the present application centralizes network states of multiple wireless access devices in a region, and further, when a UE served by a certain wireless access device needs to be handed over, a handover decision is made according to a measurement report reported by the UE, a cause for triggering handover (also referred to as a cause for triggering measurement), and the above centralized network states. Because the network state of other wireless access devices and the trigger reason of switching are considered in the switching judgment, whether the target cell in the measurement report is suitable for receiving the UE can be preliminarily evaluated, for example, whether the service meeting the service requirement of the UE can be provided for the UE, and the switching of the UE is triggered when the target cell is preliminarily evaluated to be suitable for receiving the UE, so that the accuracy of the switching judgment is improved, and the problems of switching failure, ping-pong and the like are reduced.

The network status of the above radio access device may include a load status, and may refer to a network status of the radio access device itself, or may refer to a network status of a cell covered by the radio access device. In this way, the load of the radio access equipment or the load of the cell to which the radio access equipment belongs can be used to determine whether the radio access equipment has the capability of providing service for the newly switched-in UE. For example, the load state may be a direct definition of the load state (e.g., light load, congestion, etc.), and an indication information may be set, where different values of the indication information represent different load states; when the load state shows that the wireless access equipment is in the congestion state, the wireless access equipment is not suitable for providing service for other UE, and at the moment, the UE can be determined not to be switched to the cell where the wireless access equipment is located when switching judgment is carried out. For another example, the load status may also include load information such as the number of users of the wireless access device itself or a cell covered by the wireless access device, an absolute value of channel resources, or a resource utilization rate; when the load information shows that the load of the wireless access equipment exceeds a preset value, the wireless access equipment is in a congestion state and is not suitable for providing service for other UE, and at the moment, the UE can be determined not to be switched to the cell where the wireless access equipment is located when switching judgment is carried out.

In addition, the network state of the above wireless access device may further include network behavior, which may include network behavior of itself and network behavior from the outside. For example, the network behavior of the UE may be whether the radio access device is also performing UE migration, and when the UE is also performing UE migration, the UE is usually not suitable for receiving new UE, so that it may be determined not to handover the UE to the cell where the radio access device is located according to the network behavior when performing a handover decision. For another example, when the cell of the radio access device is blocked and the link is broken, it is usually not suitable to receive a new UE, and at this time, it may also be determined not to switch the UE to the cell where the radio access device is located according to the network behavior. The network behavior from the outside may be other network devices, such as other radio access devices and CN devices, and the network behavior performed on the radio access device, for example, in a case that a CN is heavily balanced or the CN is overloaded, the CN notifies the radio access device that its capacity is overloaded, the radio access device starts to release the UE connected to the CN, at this time, the radio access device is not suitable for receiving a new UE, and at this time, it may be determined not to switch the UE to a cell where the radio access device is located according to the network behavior.

In addition, the controller may use the above centralized network status to screen candidate cells of the same standard as that of each wireless access device in advance, or screen candidate cells of different standards as that of each wireless access device. Therefore, the wireless access equipment can only perform switching configuration on the same-system candidate cell or different-system candidate cell, and the UE can only perform measurement on the configured cell according to the switching configuration. Therefore, before switching judgment, screening is carried out on the source of the target cell, and the accuracy of switching judgment is further improved. And the number of the cells measured by the UE is further reduced, the size of the measurement report is reduced, and air interface resources are saved.

Hereinafter, some terms in the present application are explained to facilitate understanding by those skilled in the art.

1) The wireless access device is a device for accessing the UE to the wireless network, and includes but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NodeB, NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), a Wifi Access Point (AP), and the like. 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, can be an independently arranged device and is provided with a wired or wireless interface used for being connected with the plurality of wireless access devices; the wireless access device may be a device integrated in a certain device, for example, integrated in a wireless access device, and the wireless access device may be in wired or wireless connection with other wireless access devices and coordinate and control itself with other wireless access devices. In addition, in a scenario where BBUs are centrally deployed, a plurality of wireless access devices are BBUs deployed by the base station, and the controller may be an independently-arranged device connected to these BBUs, or may be a device integrated on a certain BBU.

3) UE, also called terminal, is a device providing voice and/or data connectivity to a user, e.g. a handheld device with wireless connectivity, other processing devices connected to a wireless modem decoder, etc.

4) "plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The above aspects will become more apparent from the following detailed description of several embodiments, which is to be read in connection with the accompanying drawings.

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 221-22N, where N is a positive integer greater than or equal to 2, and the wireless access devices 221-22N are all connected to the controller 210. In the present embodiment, the wireless access devices 221 to 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, through other devices, which may also be wireless access devices. The connection may be a wired connection or a wireless connection. In short, the connection method is not limited in the present application as long as the communication between the wireless access device and the controller can be realized.

In the communication system, the controller 210, as a node for handover decision, may acquire a network status of each wireless access device connected thereto. When a certain UE needs to be handed over, a radio access device (e.g., radio access device 221) serving the UE performs measurement configuration on the UE, so that the UE measures a neighboring cell and reports a measurement report. The radio access device 221 reports the measurement report and the trigger reason for handover to the controller 210, so that the controller 210 preliminarily evaluates whether the target cell in the measurement report is suitable for receiving the UE in combination with the network status of each radio access device, and further makes a handover decision.

The following describes a handover procedure in the above communication system with reference to the 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 comprises the steps of:

s301: the wireless access equipment 1-N reports the network state to the controller;

optionally, the controller may preliminarily filter candidate cells that may be a handover target for each radio access device according to the received network state, and for convenience of filtering, the controller may pre-store the neighboring cell relationship of each radio access device. Since the neighboring cell relationship is variable, preferably, each wireless access device may report the neighboring cell relationship to the controller, and the wireless access device may report the neighboring cell relationship together with the network state to the controller in step S301, or may report the neighboring cell relationship to the controller separately, which is not limited in this application. Of course, the two modes can also be combined, the controller prestores the initial neighboring cell relationship, and when the neighboring cell relationship changes, the wireless access device reports the changed neighboring cell relationship again.

In this embodiment, the wireless access devices 1 to N report the network status and the neighboring cell relationship at the same time is taken as an example for description. At this time, the information reported by the wireless access devices 1 to N in step S301 further includes the neighboring cell relationship. The controller may determine a candidate cell for each wireless access device according to the network state and the neighboring cell relationship of each wireless access device. For example, when the network status includes a load status, the controller may select a lightly loaded cell as a candidate cell for each wireless access device, and may set a load threshold to screen a cell with a load less than or equal to the load threshold as a candidate cell. When there is UE in each wireless access device to be switched, the candidate cell of each wireless access device is used as the object of switching measurement. At this time, the above method further includes:

s302: and the controller determines a candidate cell for each wireless access device according to the network state and the adjacent cell relation of each wireless access device.

S303: the controller informs each wireless access device of the candidate cells determined for it. Thus, when a certain wireless access device has UE to be switched, the UE can be configured to measure the candidate cell of the wireless access device so as to obtain a measurement report to judge whether to execute the switching.

When a certain radio access device has UE to be switched, measurement configuration may be performed only for its candidate cell, which is described by taking an example that the radio access device 1 has UE to be switched, at this time, the method further includes:

s304: the wireless access equipment 1 issues measurement configuration to the UE, and instructs the UE to measure the candidate cell.

If the controller does not screen the cells, that is, the above method does not report the neighboring cell relation in step 301, and also does not include steps 302 and 303, the radio access device 1 still issues the measurement configuration when the UE needs to be switched. Only configured measurement targets are many, for example, in the prior art, the measurement targets may be configured as frequency points or cells, and taking 10 frequency points or 10 cells as an example, according to a trigger reason, the wireless access device 1 may filter out several cells, for example, filter out 3 cells and leave 7 cells, and configure the cells to the UE for measurement. Through the above step of controller screening, more cells may be further filtered, for example, 3 cells may be further filtered, so that only 4 cells are left to be configured for the UE to perform measurement. And each cell is configured less, so that the measurement resource of the UE can be saved, and the throughput rate of the UE is greatly improved.

S305: and the UE carries out measurement according to the measurement configuration issued by the wireless access equipment 1 and then reports a measurement report.

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

S306: the wireless access device 1 forwards the measurement report to the controller, and reports the trigger reason for the handover (also called trigger reason for measurement) to the controller.

S307: and the controller judges the switching according to the network state of each wireless access device, the measurement report and the triggering reason of the switching.

For example, the controller calculates data that the user feels appropriate, such as throughput or delay variation, which can be obtained by the UE in the target cell, according to the measurement report and the network state, and performs handover decision according to the data.

S308: the controller sends the switching judgment result to the wireless access equipment 1, so that the wireless access equipment 1 determines whether to execute switching or switch to which cell according to the result; or the controller directly issues a handover instruction according to the result, which is used for indicating whether the wireless access device 1 performs handover or which cell to handover to.

As can be seen, the controller may directly send the handover decision result to the wireless access device 1, or may generate a handover instruction according to the handover decision result, so as to send the handover instruction to the wireless access device 1, where the handover decision result or the handover instruction is used to indicate whether to perform handover on the UE, and when performing handover on the UE, may also indicate a target cell of the handover, or may be directly used to indicate a target cell or a cell of the handover.

After obtaining the handover decision result or the handover indication, the radio access device 1 may perform the handover, and the performing of the handover is the same as the prior art, which is not described herein again.

The network status of the above radio access device may refer to a network status of a cell of the radio access device, and when the radio access device is deployed with a plurality of cells, the network status of the plurality of cells of the radio access device is obtained. Similarly, the neighboring cell relationship of the wireless access device may also refer to the neighboring cell relationship of the cell of the wireless access device. The candidate cells determined for the wireless access device may also refer to candidate cells of each cell of the wireless 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 for controlling handover of a UE in a wireless communication system, which is shown in fig. 2 and includes a plurality of wireless access devices, and the wireless access devices are connected with a controller. The following method is performed by a controller:

s410: acquiring the network state of each wireless access device;

s420: receiving a measurement report and a switching trigger reason reported by first wireless access equipment, wherein the first wireless access equipment is the wireless access equipment of UE to be switched;

s430: performing switching judgment according to the network state of each wireless access device, the measurement report reported by the first wireless access device and the triggering reason of switching;

s440: and sending a switching judgment result or a switching instruction to the first wireless access equipment, wherein the switching judgment result or the switching instruction is used for indicating whether to switch the UE, and/or when the UE is switched, the switching judgment result or the switching instruction is used for indicating a target cell for switching. That is, the handover decision result or the handover indication is used to indicate whether to handover the UE, and when the UE is handed over, the handover decision result or the handover indication is also used to indicate a target cell for handover. Or, it may indicate whether to perform handover on the UE only by using the handover decision result or the handover indication, and when performing handover on the UE, it may indicate a target cell of the handover only by using the handover decision result or the handover indication.

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

In addition, the measurement report is obtained by the UE according to the measurement configuration of the first radio access device to the UE, and is reported to the first radio access device. The controller may screen the target cell for handover by using the acquired network state in advance to select at least one candidate cell and notify the candidate cell to the first radio access device. Therefore, the first wireless access equipment can only perform measurement configuration on the candidate cell, so that the measurement resource of the UE is saved, and the throughput rate of the UE is greatly improved.

Please refer to fig. 5, which is a flowchart illustrating 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: determining the neighbor cell of the current wireless access equipment according to the neighbor cell relation of the current wireless access equipment, wherein the current wireless access equipment is the wireless access equipment of any candidate cell to be determined in the plurality of wireless access equipment;

s520: acquiring the load state of the neighboring cell of the current wireless access equipment from the load state of each wireless access equipment;

s530: and selecting a candidate cell of the current wireless access equipment according to the load state of the adjacent cell of the current wireless access equipment.

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

As can be seen from the above description, multiple wireless access devices may have the same network standard or different network standards. And the candidate cells may include candidate cells of the same system, and may also include candidate cells of different systems. The same-system candidate cell is used for intra-system switching, and the different-system candidate cell is used for inter-system switching.

In addition, an embodiment of the present invention provides a handover control method as shown in fig. 6, which is used for controlling handover of a UE in a wireless communication system, where the wireless communication system includes a plurality of wireless access devices as shown in fig. 2, and the wireless access devices are connected to a controller. Performing, by a first radio access device of any UE to be handed over, the following method:

s610: reporting the network state of the first wireless access equipment to a controller;

s620: carrying out measurement configuration on the UE;

s630: receiving a measurement report reported by the UE according to the measurement configuration, and reporting the measurement report and a switching trigger reason to the controller, so that the controller can carry out switching judgment according to the network states of the first wireless access equipment and other wireless access equipment, the measurement report and the switching trigger reason;

s640: receiving a switching judgment result or a switching instruction sent by a controller, wherein the switching judgment result or the switching instruction is used for indicating whether to switch the UE, and/or when the UE is switched, the switching judgment result or the switching instruction is used for indicating a switched target cell; that is, the handover decision result or the handover indication is used to indicate whether to handover the UE, and when the UE is handed over, the handover decision result or the handover indication is also used to indicate a target cell for handover. Or, it may indicate whether to perform handover on the UE only by using the handover decision result or the handover indication, and when performing handover on the UE, it may indicate a target cell of the handover only by using the handover decision result or the handover indication.

S650: and executing switching control on the UE according to the switching judgment result or the switching 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 or retained in the source cell according to the indication without performing handover. For another example, when the handover decision result or the handover indication indicates a target cell for handover, the UE is handed over to the target cell.

As in the above embodiment, the network state reported in step S610 may include a load state, and before the first radio access device performs measurement configuration on the UE, the first radio access device may also report the neighboring cell relationship to the controller, so that the controller determines at least one candidate cell for each radio access device according to the load states and the neighboring cell relationships of the first radio access device and other radio access devices, and notifies the determined candidate cell to the candidate cell determined by the first radio access device. At this time, the first radio access device may configure the UE to measure only the candidate cells of the first radio access device in step S620 above.

The following describes the implementation of the above handover control method in the controller and the wireless access device, respectively, with reference to the drawings.

Please refer to fig. 7, which is a schematic structural diagram of a switching control apparatus according to an embodiment of the present invention. The apparatus is used in a communication system as shown in fig. 2 and is located at a controller. As shown in fig. 7, the apparatus 700 includes an obtaining unit 710 and a handover determining unit 720. The obtaining unit 710 is configured to obtain a network state of each wireless access device; the method further includes obtaining a measurement report reported by a first radio access device and a handover trigger reason, where the first radio access device is a radio access device of the UE to be handed over. The handover decision unit 720 is configured to make a handover decision according to the network status of each wireless access device, the measurement report acquired by the acquisition unit 710, and a handover trigger reason; and sending a switching judgment result or a switching instruction to the first wireless access equipment, wherein the switching judgment result or the switching instruction is used for indicating whether to switch the UE, and when the UE is switched, the switching judgment result or the switching instruction is also used for indicating a target cell for switching. Alternatively, whether or not to perform handover to the UE may be indicated only by the handover decision result or the handover indication, and when performing handover to the UE, the target cell of the handover may be indicated only by the handover decision result or the handover indication.

The network status of each wireless access device may include a load status of each wireless access device, and at this time, the obtaining unit 710 may obtain the network status of each wireless access device from an interface communicating with each wireless access device through the controller. In addition, the network state of each wireless access device may further include network behaviors, for example, the network behavior of each wireless access device itself and the network behavior from the outside. The above obtaining unit 710 may obtain the network behavior of each wireless access device from an interface for communicating with each wireless access device through the controller, and for the network behavior from the outside, the obtaining unit 710 may obtain from an executor of the network behavior or from each wireless access device. For example, when the CN overload notifies the radio access device thereunder to release the UE, the obtaining unit 710 may obtain the network behavior from the outside from the CN device, or of course, may directly obtain the network behavior from the outside from the radio access device.

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

Please refer to fig. 8, which is a schematic structural diagram of another switching control apparatus according to an embodiment of the present invention. Which differs from fig. 7 in that the apparatus further comprises a determination unit 730. The obtaining unit 710 is further configured to obtain a neighboring cell relationship of each wireless access device; the determining unit 730 is configured to determine at least one candidate cell for each radio access device according to the load status and the neighboring cell relationship of each radio access device; and sending the candidate cells determined for each wireless access device to each wireless access device, so that the first wireless access device configures the UE to measure the candidate cells of the first wireless access device to obtain a measurement report.

The obtaining unit 710 may obtain the neighboring cell relation of each radio access device from an interface that communicates with each radio access device through the controller. And the neighboring cell relation and the load state can be reported to the controller by the wireless access equipment. For example, when the neighboring cell relation of each wireless access device is updated, the updated neighboring cell relation or the updated neighboring cell may be reported to the controller, so that the obtaining unit 710 obtains the updated neighboring cell relation or the updated neighboring cell relation.

The determining unit 730 may perform the operations shown in fig. 5 to determine the candidate cell of each wireless access device, which may specifically refer to the above embodiments and is not described herein again. In addition, the description of the network status is the same as the above embodiments, and is not repeated herein.

The above units may be individually configured processors, or may be implemented by being integrated into one of the processors of the controller, or may be stored in a memory of the controller in the form of program codes, and the functions of the above units may be called and executed by one of the processors of the controller. In addition, the units can be integrated together or can be independently realized. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.

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 via a bus 940 and communicate with each other, and the interface circuit 930 is used for communicating with the above wireless access devices and the memory is used for storing programs.

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

acquiring the network status of each wireless access device through the interface circuit 930; the measurement report and the handover trigger reason reported by the first radio access device are obtained through the interface circuit 930, where the first radio access device is a radio access device of the UE to be handed over;

performing switching judgment according to the network state of each wireless access device, the measurement report and the triggering reason of switching; and sending a switching judgment result or a switching instruction to the first wireless access equipment, wherein the switching judgment result or the switching instruction is used for indicating whether to switch the UE, and/or when the UE is switched, the switching judgment result or the switching instruction is used for indicating a target cell for switching. That is, the handover decision result or the handover indication is used to indicate whether to handover the UE, and when the UE is handed over, the handover decision result or the handover indication is also used to indicate a target cell for handover. Alternatively, whether or not to perform handover to the UE may be indicated only by the handover decision result or the handover indication, and when performing handover to the UE, the target cell of the handover may be indicated only by the handover decision result or the handover indication.

Further, the processor 910 may further perform: acquiring the adjacent area relation of each wireless access device; determining at least one candidate cell for each wireless access device according to the load state and the adjacent cell relation of each wireless access device; and informing each wireless access device of the determined candidate cells for the wireless access device so that the first wireless access device configures the UE to measure the candidate cells of the first wireless access device to obtain the measurement report. The method for selecting the candidate cell is the same as the above embodiments, and is not described herein again.

It should be noted that the processor 910 herein may be a single processor or may be a general term for 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 microprocessors (digital signal processors, DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The memory 920 may be a storage device or a combination of storage elements, and is used for storing executable program codes or parameters, data, etc. required by the operation of the access network management device. And the memory 920 may include a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, a Flash memory (Flash), and the like.

The bus 940 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus 940 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

The controller may also include input and output devices that provide input and/or output interfaces for an operator, and is coupled to the bus 940 for coupling to the processor 910, among other things, via the 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 apparatus is used in the communication system as shown in fig. 2 and is located in any wireless access device. As shown in fig. 10, the apparatus 100 includes a reporting unit 101, a configuring unit 102, an obtaining unit 103, and a switching control unit 104. The reporting unit 101 is configured to report a network state of a first radio access device where the first radio access device is located to a controller, where the first radio access device is a radio access device of a UE to be handed over; the configuration unit 102 is configured to perform measurement configuration on the UE; the obtaining unit 103 is configured to obtain a measurement report reported by the UE according to the measurement configuration of the configuring unit 102; the reporting unit 101 reports the measurement report and the handover trigger reason obtained by the obtaining unit 103 to the controller, so that the controller can make a handover decision according to the network states of the first radio access device and other radio access devices, the measurement report and the handover trigger reason; and a handover control unit 104, configured to receive a handover decision result or a handover instruction sent by the controller, and execute handover control on the UE according to the handover decision result or the handover instruction. The handover decision result or the handover indication is used to indicate whether to handover the UE, and/or when handover is performed to the UE, the handover decision result or the handover indication is used to indicate a target cell for handover. That is, the handover decision result or the handover indication is used to indicate whether to handover the UE, and when the UE is handed over, the handover decision result or the handover indication is also used to indicate a target cell for handover. Alternatively, whether or not to perform handover to the UE may be indicated only by the handover decision result or the handover indication, and when performing handover to the UE, the target cell of the handover may be indicated only by the handover decision result or the handover indication.

As in the above embodiment, each radio access device may also report its neighboring cell relationship, so that the controller selects a candidate cell for each radio access device according to the neighboring cell relationship and the network state of each radio access device. At this time, the reporting unit 101 is further configured to report the neighboring cell relationship of the first radio access device to the controller, so that the controller determines at least one candidate cell for each radio access device according to the load states and the neighboring cell relationships of the first radio access device and other radio access devices; and the configuration unit 102 is configured to receive the candidate cell determined for the first radio access device and sent by the controller, and configure the UE to perform measurement on the candidate cell of the first radio access device.

It should be noted that the reporting unit 101 may report the relevant information to the controller through an interface between the radio access device and the controller, for example: network state, measurement report, trigger reason of switching, and neighbor relation. The acquisition unit 103 may acquire a measurement report from the UE through the 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 unit may be a processor which is set up separately, or may be implemented by being integrated into a certain processor of the wireless access device, or may be stored in a memory of the controller in the form of program codes, and the certain processor of the controller may call and execute the functions of each unit. In addition, the units can be integrated together or can be independently realized. The processor described herein may 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 are connected via a bus 115 and communicate with each other, the first interface circuit 113 is used for communicating with a controller, the second interface circuit 114 is used for communicating with a UE, and the memory is used for storing programs.

The processor 111 calls the program stored in the memory 112 to execute the handover control method executed by any one of the above wireless access devices, for example, to execute the following operations:

reporting the network state to the controller through the first interface circuit 113;

carrying out measurement configuration on the UE;

receiving a measurement report reported by the UE according to the measurement configuration through the second interface circuit 114, and reporting the measurement report and a handover trigger reason to the controller, so that the controller performs a handover decision according to a network state of each radio access device, the reported measurement report and the handover trigger reason;

receiving, by the first interface circuit 113, a handover decision result or a handover instruction sent by the controller, where the handover decision result or the handover instruction is used to indicate whether to handover the UE, and/or, when performing handover on the UE, to indicate a target cell for handover, as in the above embodiment;

and executing switching control on the UE according to the switching judgment result or the switching indication.

In addition, the first interface circuit 113 may also be used to report the neighboring cell relationship to the controller, so that the controller selects candidate cells for each radio access device according to the neighboring cell relationship and the network state of each radio access device, and thus each radio access device only needs to perform measurement configuration on the candidate cells.

Can be connected with radio frequency elements such as an antenna and the like to realize communication with UE

It should be noted that the processor 111 may be a single processor or may be a collective term for a plurality of 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 DSPs, or one or more FPGAs.

The memory 112 may be a storage device or a combination of storage elements, and is used for storing executable program codes or parameters, data, etc. required by the operation of the access network management device. And the memory 112 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as a magnetic disk memory, a Flash memory (Flash), and the like.

Bus 115 may be an ISA bus, PCI bus, EISA bus, or the like. The bus 115 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.

The wireless access device may also include input and output devices to provide an operator with input and/or output interfaces that are coupled to the bus 115 to interface with the processor 111, among other components, via the bus. Radio frequency components, such as an antenna, may also be included and coupled to the second interface circuit 114 to enable communication with the UE.

The following is an example of intra-system switching and inter-system switching, respectively.

And (3) switching in a system:

each wireless access device in the same system reports the network state to the controller by periodic or event triggering. The network status may include the load status of the device, the behavior of the device (e.g., whether a UE transfer is also in progress), and the ongoing network behavior of other network devices with respect to it. After receiving the measurement report reported by the UE, each radio access device reports the measurement report and the trigger cause of handover to the controller. After receiving a measurement report of a certain radio access device C, the controller combines the trigger reason of handover and the network status, for example: the load status and the device behavior of the target wireless access device D (for example, whether UE transfer is also being performed), the device behavior of the other devices on the target wireless access device D, whether handover is granted to the measurement report reported by the wireless access device C is comprehensively determined, and the determination result is transmitted to the wireless access device C. And the wireless access equipment receives the judgment result and sends a switching command to the judgment result to be switched.

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

The UE initiates a video service at a certain wireless access device of L TE, L TE judges that the throughput rate of the video service does not meet the condition, and then sends measurement configuration to the UE, wherein the range of the measurement configuration is in a relatively idle adjacent L TE wireless access device cell given by a controller.

The method comprises the steps that UE reports a measurement report to L TE wireless access equipment, L TE wireless access equipment reports the measurement report and a trigger reason of switching (for example, throughput rate of the video service does not meet a condition) to a controller, the controller calculates whether the video service can obtain higher throughput rate for an adjacent wireless access equipment cell according to the measurement report, and returns a judgment result to L TE wireless access equipment, L TE wireless access equipment determines whether to execute switching to the adjacent wireless access equipment and the UE according to a judgment result sent by the controller, for example, the judgment result sent by the controller is that the higher throughput rate can be obtained in the adjacent wireless access equipment cell, a switching request is sent to the adjacent wireless access equipment, a switching command is sent to the UE after the switching request of the adjacent wireless access equipment is confirmed, the UE executes switching of the adjacent wireless access equipment after the switching command is received, and the video service obtains the higher throughput rate after the adjacent wireless access equipment cell is switched.

Switching between systems:

the wireless access devices of each system report network states, such as load states and network behaviors, to the controller by periodic or event triggering. The network behavior may include its own network behavior, such as whether UE transfer is also performed, and network behavior from the outside, such as network behavior on which other network standards are performed. After receiving the measurement report reported by the UE, the wireless access devices of each system report the measurement report and the trigger reason for the handover to the controller. After receiving the measurement report of a certain system A, the controller comprehensively judges whether the measurement report reported by the system A is permitted to be switched or not by combining the trigger reason of switching and the wireless network state of the target system B, and transmits the judgment result to the system A. And the system receiving the judgment result sends a switching command to the judgment result to be switched.

For example, switching between L TE and UMTS standards is carried out, wireless access equipment of each standard periodically reports a network state of the standard and an adjacent cell relation to a controller respectively, wherein the network state can comprise a load state of a cellular cell and can also comprise an average throughput rate which can be obtained by each UE in each wireless resource unit, the adjacent cell relation can comprise an adjacent relation of a L TE wireless access cell and a UMTS wireless access cell on coverage, and the controller selects a relatively idle adjacent UMTS cell for a cell of the L TE standard periodically according to the network state and the adjacent cell relation reported by L TE and UMTS, selects a relatively idle adjacent L TE cell for the cell of the UMTS standard, and notifies a selection result to the wireless access equipment of each standard.

The method comprises the steps that a certain UE initiates a video service in a L TE network, L TE wireless access equipment judges that the throughput rate of the video service does not meet the condition, further, L TE wireless access equipment transmits measurement configuration to the UE, the range of the measurement configuration is in a relatively idle adjacent UMTS cell given by a controller, the UE measures according to the measurement configuration and reports the measurement report to L TE wireless access equipment, L TE wireless access equipment reports the measurement report and the trigger reason of switching (for example, the throughput rate of the video service does not meet the condition) to a controller, the controller calculates whether the video service can obtain higher throughput rate in the UMTS adjacent cell according to the measurement report, and returns the judgment result to L TE wireless access equipment, L TE wireless access equipment determines whether to execute switching to the core network and the UE according to the judgment result transmitted by the controller, for example, the judgment result transmitted by the controller is that the higher throughput rate can be obtained in the UMTS adjacent cell, the UE initiates switching preparation to the core network, and executes the switching to obtain the higher throughput rate of the UMTS adjacent cell after receiving a switching command of the UE.

It will be apparent to those skilled in the art from this disclosure that the present invention may be implemented in hardware, or firmware, or a combination thereof, that when implemented in software, the functions described above may be stored on or transmitted as one or more instructions or code on a computer-readable medium.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. 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 comprising:

the controller acquires the network state of each wireless access device;

the method comprises the steps that a controller receives a measurement report reported by first wireless access equipment and a switching trigger reason, wherein the first wireless access equipment is the wireless access equipment of user equipment to be switched;

sending 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 handover the user equipment, and/or, when the user equipment is handed over, the handover decision result or the handover indication is used to indicate a target cell for handover;

wherein the network state of each wireless access device comprises a load state;

wherein, still include:

the controller determines at least one candidate cell for each wireless access device according to the load state and the adjacent cell relation of each wireless access device; the controller informs each wireless access device of the determined candidate cells, so that the first wireless access device configures the user equipment to measure the candidate cells of the first wireless access device to obtain the measurement report.

2. The method of claim 1, 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.

3. The method of claim 1, wherein the controller determines at least one candidate cell for each radio access device according to the network status and the neighbor relation of each radio access device, comprising:

4. The method of claim 2, wherein the controller determines at least one candidate cell for each radio access device according to the network status and the neighbor relation of each radio access device, comprising:

5. The method of any one of claims 1 to 4, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

6. The method of any of claims 1 to 4, wherein the network state further comprises network behavior, the network behavior comprising own network behavior and/or network behavior from the outside world.

7. The method of claim 5, wherein the network state further comprises network behavior, the network behavior comprising network behavior of itself and/or network behavior from the outside world.

8. A handover control method, characterized in that the method has all the features of any one of the methods in claims 1 to 7, and the plurality of radio access devices have the same network standard or different network standards.

9. 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 comprising:

the first wireless access equipment reports the network state of the first wireless access equipment to the controller, wherein the first wireless access equipment is the wireless access equipment of the user equipment to be switched;

the first wireless access equipment carries out measurement configuration on the user equipment;

the first radio access equipment receives a measurement report reported by the user equipment according to the measurement configuration, and reports the measurement report and a switching trigger reason to a controller, so that the controller can carry out switching judgment according to the network states of the first radio access equipment and other radio access equipment, the measurement report and the switching trigger reason;

the first radio access equipment receives a switching judgment result or a switching indication sent by the controller, wherein the switching judgment result or the switching indication is used for indicating whether to switch the user equipment or not, and/or when the user equipment is switched, the switching judgment result or the switching indication is used for indicating a target cell to be switched;

the first wireless access equipment executes switching control on the user equipment according to the switching judgment result or the switching indication;

before the first radio access device performs measurement configuration on the user equipment, the method further includes:

and the first radio access equipment performs measurement configuration on the user equipment, including:

the first wireless access equipment configures the user equipment to measure the candidate cells of the first wireless access equipment.

10. The method of claim 9, 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.

11. The method of claim 9, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

12. The method of claim 10, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

13. The method of any of claims 9 to 12, wherein the network state further comprises network behavior, the network behavior comprising own network behavior and network behavior from the outside world.

14. The method according to any one of claims 9 to 12, wherein the plurality of wireless access devices have the same network standard, or different network standards.

15. The method of any of claim 13, wherein the plurality of wireless access devices have the same network standard, or different network standards.

16. A handover control apparatus 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 handover control apparatus is located in the controller, and includes an obtaining unit and a handover decision unit:

the acquiring unit is further configured to acquire a measurement report and a handover trigger reason, which are reported by a first radio access device, where the first radio access device is a radio access device of a user equipment to be handed over;

the switching decision unit is used for making switching decision according to the network state of each wireless access device, the measurement report and the triggering reason of switching; sending 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 handover the user equipment, and/or, when the user equipment is handed over, the handover decision result or the handover indication is used to indicate a target cell for handover;

wherein, still include the determining unit, wherein:

the determining unit is configured to determine at least one candidate cell for each radio access device according to the load state and the neighboring cell relationship of each radio access device; and sending the candidate cells determined for each wireless access device to each wireless access device, so that the first wireless access device configures the user equipment to measure the candidate cells of the first wireless access device to obtain the measurement report.

17. The apparatus of claim 16, 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.

18. The apparatus of claim 16, wherein the determining unit is configured to determine the candidate cells for each wireless access device by:

19. The apparatus of claim 17, wherein the determining unit is configured to determine the candidate cells for each wireless access device by:

20. The apparatus of any of claims 16 to 19, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

21. The apparatus of any of claims 16 to 19, wherein the network state further comprises network behavior, the network behavior comprising own network behavior and network behavior from the outside world.

22. The apparatus of any of claim 20, wherein the network state further comprises network behavior, the network behavior comprising own network behavior and network behavior from the outside world.

23. A handover control apparatus, characterized in that the apparatus has all the features of the apparatus of any one of claims 16 to 22, and the plurality of radio access devices have the same network system, or different network systems.

24. A handover control apparatus 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 handover control apparatus is located in any wireless access device, and comprises:

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

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

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

a handover control unit, configured to receive a handover decision result or a handover indication sent by the controller, and execute handover control on the ue according to the handover decision result or the handover indication, where the handover decision result or the handover indication is used to indicate whether to perform handover on the ue, and/or when performing handover on the ue, the handover decision result or the handover indication is used to indicate a target cell for handover;

wherein, before the configuration unit performs measurement configuration on the ue, the reporting unit is further configured to:

and the configuration unit is configured to: and receiving the candidate cell determined for the first radio access equipment and sent by the controller, and configuring the user equipment to measure the candidate cell of the first radio access equipment.

25. The apparatus of claim 24, 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.

26. The apparatus of claim 24, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

27. The apparatus of claim 25, wherein the candidate cells comprise one or both of same-standard candidate cells and different-standard candidate cells.

28. The apparatus of any of claims 24 to 27, wherein the network state further comprises network behavior, the network behavior comprising own network behavior and network behavior from the outside world.

29. The apparatus according to any one of claims 24 to 27, wherein the plurality of wireless access devices have the same network standard, or different network standards.

30. The apparatus of claim 28, wherein the plurality of wireless access devices have the same network standard, or different network standards.

31. A communication system comprising a controller, a plurality of wireless access devices connected to the controller, wherein the controller comprises the apparatus of any of claims 16 to 23, and each wireless access device comprises the apparatus of any of claims 24 to 30.

32. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by hardware, is capable of implementing the method of any one of claims 1 to 15.