WO2014166456A2

WO2014166456A2 - Cell handoff method, system, base station and computer storage medium

Info

Publication number: WO2014166456A2
Application number: PCT/CN2014/078574
Authority: WO
Inventors: 章正权
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-07-18
Filing date: 2014-05-27
Publication date: 2014-10-16
Also published as: WO2014166456A3; CN104301960A

Abstract

A cell handoff method, system, base station and computer storage medium are disclosed in embodiments of the present invention. The cell handoff method comprises: an originating base station groups the neighbor cells contained in a received measurement report on the basis of the base station to which said cells belong, and then ranks the groups according to priority; the originating base station selects from the highest priority neighbor cell group at least one neighbor cell as a candidate cell, then sends information about said at least one candidate cell to a target base station in order to implement a subsequent handoff.

Description

Cell handover method, system, base station and computational accumulation medium

The present invention relates to communication technologies, and in particular, to a cell handover method, system, base station, and computer storage medium. Background technique

The Long Term Evolution (LTE) system uses the network control and user equipment (UE, User Equipment) to switch. When the UE requests the source evolved Node B (eNB, evolved NodeB) to switch out of the cell, it needs to send a handover request to the source eNB. However, in the existing cell handover method, the handover request can only carry one target cell. If multiple candidate cells belong to the same eNB, since the handover process cannot be performed concurrently, it can only be performed serially, which will increase the duration of the handover preparation phase. And the risk of the UE dropping the call is increased. At the same time, in order to select the optimal target cell in the handover decision to ensure the quality of service of the UE, the X2 interface-based load information interaction between the target eNB and the source eNB is required, and the processing is increased. Complexity, and is limited by the availability of an available X2 interface between the source eNB and the target eNB. Summary of the invention

In order to solve the existing technical problems, the embodiments of the present invention provide a cell handover method, a system, a base station, and a computer storage medium, which can reduce the handover delay caused by the cell handover process, and reduce the UE drop call in the cell handover. Risk, reducing the complexity of the switching process.

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a cell handover method, which is applied to a source base station, where the method includes:

The source base station divides the neighboring cell carried in the received measurement report according to the home base station. Group, and prioritize the neighbors and district groups;

The source base station selects at least one neighboring cell from the neighboring cell group with the highest priority as the candidate cell, and sends information of the at least one candidate cell to the target base station to implement subsequent handover.

Preferably, the prioritizing the neighboring cell groups includes:

Sorting neighbor cell groups according to reference signal received power (RSRP, Reference Signal Received Power) and/or reference signal received quality (SRQ) in the measurement report, and according to the RSRP and / Or the RSRQ prioritizes the neighboring cells in the neighboring cell groups.

Preferably, the selecting the at least one neighboring cell from the highest priority neighboring cell group as the candidate cell, and transmitting the information of the candidate cell to the target base station, including:

The source base station selects at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, and sends the information of the candidate cell to the target base station by using a handover request message.

Preferably, the method further includes:

The source base station receives a handover request response message sent by the target base station, where the handover request response message carries the candidate cell information with the lightest load;

The received candidate cell information with the lightest load is sent to the UE by using a Radio Resource Control (RRC) connection reconfiguration message.

The embodiment of the present invention further provides a cell handover method, which is applied to a target base station, where the method includes: the target base station acquires a radio resource measurement result of the self cell, and sends the radio resource measurement result from the received source base station according to the radio resource measurement result. The candidate cell with the lightest load is determined from the information of the at least one candidate cell, and the UE is instructed to switch to the candidate cell with the lightest load.

Preferably, the target base station acquires the radio resource measurement result of the self-cell, and the RRC sub-layer of the target base station indicates that the media access control (MAC) sub-layer performs radio resource measurement on the object to be measured; The MAC sublayer performs radio resource measurement on the object to be measured, and returns a radio resource measurement result to the RRC sublayer.

Preferably, the target base station indicates that the UE switches to the candidate cell with the lightest load, and the method includes: the target base station sends a handover request response message to the source base station, where the handover request response message carries the candidate cell with the lightest load information.

The embodiment of the invention further provides a cell handover method, where the method includes:

The source base station groups the neighboring cells carried in the received measurement report according to the home base station, and prioritizes the neighboring cells and the zone packets.

The source base station selects at least one neighboring cell from the neighboring cell group with the highest priority as the candidate cell, and sends information of the at least one candidate cell to the target base station;

The target base station acquires the radio resource measurement result of the own cell, and determines the lightest candidate cell from the received information of the at least one candidate cell sent by the source base station according to the radio resource measurement result, and instructs the UE to switch to the load. The lightest candidate cell.

The embodiment of the present invention further provides a base station, where the base station is a source base station, and the base station includes: a first receiving module, a grouping module, a sorting selection module, and a first sending module;

The first receiving module is configured to receive a measurement report, and send the measurement report to the grouping module and the sorting selection module;

The grouping module is configured to group the neighboring cells carried in the measurement report sent by the first receiving module according to the home base station, and send the neighboring cell group to the sorting selection module; And performing, according to the measurement report sent by the first receiving module, the neighboring cell packets sent by the grouping module, and selecting at least one neighboring cell as the candidate cell from the neighboring cell group with the highest priority, Transmitting information of the at least one candidate cell to the first sending module;

The first sending module is configured to send information of the at least one candidate cell sent by the sorting selection module to a target base station to implement subsequent handover. Preferably, the order selection module is configured to prioritize neighboring cell groups according to RSRP and/or RSRQ in the measurement report sent by the first receiving module, and according to the RSRP and/or RSRQ pair The neighboring cells in each neighboring cell group are prioritized.

Preferably, the order selection module is configured to select at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, and send information of the at least one candidate cell to the first a sending module;

The first sending module is configured to send information of the at least one candidate cell sent by the sorting selection module to a target base station by using a handover request message.

Preferably, the first receiving module is further configured to receive a handover request response message sent by the target base station, where the handover request response message carries the lightest candidate cell information; the first sending module is further configured And transmitting, to the UE, the least-carry candidate cell information received by the first receiving module by using an RRC connection reconfiguration message.

The embodiment of the present invention further provides a base station, where the base station is a target base station, where the base station includes: an acquiring module, a second receiving module, a determining module, and a switching indication module;

The acquiring module is configured to obtain a radio resource measurement result of the self cell, and send the radio resource measurement result to the determining module;

The second receiving module is configured to receive information of the at least one candidate cell sent by the source base station, and send the information of the at least one candidate cell to the determining module;

The determining module is configured to determine, according to the radio resource measurement result sent by the acquiring module, the candidate cell with the lightest load from the at least one candidate cell sent by the second receiving module, where the load is the most a light candidate message is sent to the handover indication module;

The handover indication module is configured to instruct the UE to switch to the candidate cell with the lightest load sent by the determining module.

Preferably, the acquiring module is configured to perform radio resource measurement by using a radio resource control RRC sublayer to indicate a media access control MAC sublayer to be measured object; Performing radio resource measurement on the object to be measured, and returning a radio resource measurement result to the RRC sublayer.

Preferably, the handover indication module is further configured to send a handover request response message to the source base station, where the handover request response message carries the candidate cell information with the lightest load.

The embodiment of the present invention further provides a cell handover system, where the system includes: a source base station and a target base station;

The source base station is configured to group the neighboring cells carried in the received measurement report according to the home base station, and prioritize the neighboring cell packets; select at least one neighboring cell from the neighbor cell with the highest priority as the neighboring cell a candidate cell, sending information of the at least one candidate cell to the target base station;

The target base station is configured to obtain a radio resource measurement result of the self cell, and determine, according to the radio resource measurement result, the candidate cell with the lightest load from the received information of the at least one candidate cell sent by the source base station, and The UE is instructed to switch to the lightest candidate cell.

Preferably, the source base station is configured to prioritize neighboring cell groups according to RSRP and/or RSRQ in the measurement report, and select neighbors in the neighboring cell groups according to the RSRP and/or RSRQ. The cell is prioritized.

Preferably, the source base station is configured to select at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, and send the information of the candidate cell by using a handover request message. Give the target base station.

Preferably, the target base station is configured to perform radio resource measurement on the MAC sub-layer to be measured by the RRC sub-layer; perform radio resource measurement on the to-be-measured object by using the MAC sub-layer, and go to the RRC sub-layer Returns the wireless resource measurement result.

Preferably, the target base station is further configured to send a handover request response message to the source base station, where the handover request response message carries information of the candidate cell with the lightest load; The source base station is further configured to receive a handover request response message sent by the target base station, where the handover request response message carries the candidate cell information with the lightest load; and the received candidate cell with the lightest load The information is sent to the UE through an RRC connection reconfiguration message.

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to perform a cell handover method applied to a source base station according to an embodiment of the present invention. .

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute a cell handover method applied to a target base station according to an embodiment of the present invention. .

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to perform the cell switching method according to the embodiment of the present invention.

The cell handover method, the system, the base station, and the computer storage medium provided by the embodiment of the present invention, the source base station groups the neighboring cells carried in the received measurement report according to the home base station, and prioritizes the neighbor cell group; Selecting at least one neighboring cell as the candidate cell, and transmitting the information of the at least one candidate cell to the target base station to implement the subsequent handover; the target base station acquiring the radio resource measurement result of the own cell, according to the radio resource The measurement result determines the lightest candidate cell from the received at least one candidate cell, and instructs the UE to switch to the lightest candidate cell; thus, multiple candidate cells are sent in parallel through the source base station. For the target base station, the handover delay that can only be transmitted by the multiple candidate cells to the target base station by serial transmission is reduced in the prior art; on the other hand, the target base station can select the cell with the best quality and the least load to perform handover preparation. Reduces the risk of UE dropped calls during cell handover; and, In the technical solution of the present invention, the process of exchanging load information through the X2 interface in the prior art is omitted, and the complexity of the handover process is reduced. DRAWINGS

1 is a schematic flowchart of a cell handover method according to a first embodiment of the present invention;

2 is a schematic flowchart of a cell handover method according to a second embodiment of the present invention;

3 is a schematic flowchart of a cell handover method according to a third embodiment of the present invention;

4 is a schematic flowchart of a cell handover method according to a fourth embodiment of the present invention; FIG. 5 is a schematic flowchart of a cell handover method according to a fifth embodiment of the present invention; FIG. Schematic diagram of a method flow of wireless resource measurement results;

FIG. 7 is a schematic flowchart of a method for acquiring a radio resource measurement result by a target base station according to a seventh embodiment of the present invention;

8 is a schematic structural diagram of a source base station according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a target base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a structure of a cell switching system according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The embodiment of the present invention provides a cell handover method. FIG. 1 is a schematic flowchart of a cell handover method according to a first embodiment of the present invention. The cell handover method in this embodiment is applied to a source base station; The cell handover method includes the following steps:

Step 101: The source base station groups the neighboring cells carried in the received measurement report according to the home base station.

Here, before the source base station receives the measurement report, the method further includes: the source base station transmitting the RRC connection reconfiguration message according to the configuration of the background and the capability of the UE; and performing, by the UE, the measurement configuration parameter carried in the RRC reconfiguration message The object performs the measurement and sends the measurement result to the source base station through the measurement report.

Step 102: Prioritize the neighboring cell groups. Here, the source base station prioritizes the neighboring cell groups according to the RSRP and/or the RSRQ carried in the channel quality in the measurement report, and prioritizes the neighboring cells in the neighboring cell groups according to the RSRP and/or the RSRQ. Sort.

Step 103: The source base station selects at least one neighbor cell as the candidate cell from the neighbor cell group with the highest priority, and sends the information of the at least one candidate cell to the target base station to implement subsequent handover.

Here, the source base station selects at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, and forms information of the at least one candidate cell into a candidate cell list by using a handover request. The message is sent to the target base station.

Preferably, the method further includes: the source base station receiving a handover request response message sent by the target base station, where the handover request response message carries the lightest candidate cell information;

The received candidate cell information with the lightest load is sent to the UE through a radio resource control RRC connection reconfiguration message.

The embodiment of the present invention further provides a cell handover method. FIG. 2 is a schematic flowchart of a cell handover method according to a second embodiment of the present invention; the cell handover method according to this embodiment is applied to a target base station; The cell handover method includes the following steps:

Step 201: The target base station acquires the radio resource measurement result of the own cell, and determines the candidate cell with the lightest load from the at least one candidate cell sent by the received source base station according to the radio resource measurement result.

Here, the acquiring, by the target base station, the radio resource measurement result of the own cell includes: the RRC sublayer of the target base station instructing the MAC sublayer to perform radio resources on the object to be measured Measurement

The MAC sublayer performs radio resource measurement on the object to be measured, and returns a radio resource measurement result to the RRC sublayer.

Specifically, the target base station receives a handover request message sent by the source base station, where the switch request message carries a candidate cell list;

The target base station sorts the candidate cells in the candidate cell list according to the obtained radio cell measurement result of the self cell, and selects the candidate cell with the lightest load as the target handover cell.

Step 202: Instruct the UE to switch to the lightest candidate cell.

Here, the target base station selects the lightest candidate cell as the target handover cell to perform handover preparation, and sends a handover request response message to the source base station when the handover preparation is successful, where the handover request response message carries The information of the candidate cell with the lightest load, the mobility control information, and the like, wherein the information of the candidate cell with the lightest load is the information of the target handover cell. Specifically, the target handover cell information is the target handover. The identity of the cell.

The embodiment of the present invention further provides a cell handover method. FIG. 3 is a schematic flowchart of a cell handover method according to a third embodiment of the present invention; the cell handover method according to this embodiment is applied to a target base station; The cell handover method includes the following steps:

Step 301: The source base station groups the neighboring cells carried in the received measurement report according to the home base station.

Here, before the source base station receives the measurement report, the method further includes: the source base station transmitting the RRC connection reconfiguration message according to the configuration of the background and the capability of the UE; and performing, by the UE, the measurement configuration parameter carried in the RRC reconfiguration message The object performs the measurement and passes the measurement result through the measurement report. The announcement is sent to the source base station.

Step 302: Prioritize the neighboring cell groups.

Here, the source base station prioritizes the neighboring cell groups according to the RSRP and/or the RSRQ carried in the channel quality in the measurement report, and prioritizes the neighboring cells in the neighboring cell groups according to the RSRP and/or the RSRQ. Sort.

Step 303: The source base station selects at least one neighbor cell as the candidate cell from the neighbor cell group with the highest priority, and sends the information of the at least one candidate cell to the target base station.

Step 304: The target base station acquires the radio resource measurement result of the own cell, and determines the candidate cell with the lightest load from the received at least one candidate cell sent by the source base station according to the radio resource measurement result.

Here, the target base station indicates, by the RRC sublayer, the MAC sublayer performs radio resource measurement on the object to be measured; the MAC sublayer performs radio resource measurement on the object to be measured, and returns radio resource measurement result to the RRC sublayer. .

Step 305: Instruct the UE to switch to the lightest candidate cell.

Here, the target base station selects the lightest candidate cell as the target handover cell to perform handover preparation, and sends a handover request response message to the source base station when the handover preparation is successful, where the handover request response message carries Information and shift of the lightest candidate cell The information of the candidate cell with the lightest load is the information of the target handover cell. Specifically, the target handover cell information is an identifier of the target handover cell.

Preferably, the source base station receives a handover request response message sent by the target base station, where the handover request response message carries the lightest candidate cell information;

FIG. 4 is a schematic flowchart of a cell handover method according to a fourth embodiment of the present invention. The first embodiment is a cell handover method based on an S1 interface. As shown in FIG. 4, the method includes the following steps: Step 401 to Step 403: Source The eNB sends a radio resource control connection reconfiguration message to the UE, and receives the radio resource control connection reconfiguration complete message returned by the UE, and receives the measurement report returned by the UE.

Here, the source eNB sends a measurement configuration parameter to the UE by using an RRC connection reconfiguration message, and the UE performs measurement on the execution object according to the measurement configuration parameter, and sends a measurement to the source eNB after the reporting condition is met. report.

Step 404: The source eNB filters the neighboring cells in the neighboring cell list carried by the measurement report, and groups the neighboring cells according to the home base station, and prioritizes the neighboring cell groups according to the measurement result, and selects the neighbor with the highest priority. At least one neighboring cell in the cell group is used as a candidate cell.

Here, the source eNB filters the neighboring cells in the neighboring cell list carried in the measurement report, filters out the unsupported neighboring cells, and groups the neighboring cells according to the home base station, and according to the channel quality in the measurement result. Carrying the RSRP and/or the RSRQ to prioritize the neighboring cell groups, and prioritizing the neighboring cells in the neighboring cell groups according to the RSRP and/or the RSRQ, and selecting the neighbor cell group with the highest priority At least one neighboring cell as a candidate small Area.

Step 405 to step 406: The source eNB sends a handover request message to the target eNB through a core network mobility management entity (MME, Mobility Management Entity).

Here, the handover request message carries a candidate cell list, and is sent by the MME to the target eNB, where the candidate cell list includes the at least one candidate cell.

Step 407: The target eNB acquires the radio resource measurement result, and sorts the candidate cell list carried in the handover request message according to the measurement result, and selects the candidate cell with the lightest load as the target handover cell to perform handover preparation.

Here, the RRC sublayer of the target base station instructs the MAC sublayer to perform radio resource measurement on the object to be measured;

Step 408: The target eNB sends a handover request response message to the MME.

Here, after the handover preparation of the target eNB is successful, the handover request response message is sent to the MME, where the handover request response message carries the target handover cell identifier and the mobility control information.

Step 409 to step 410: The MME sends a handover command message to the source eNB, and the source eNB forwards the handover command message to the UE.

Here, the source eNB forwards the handover command message to the UE by using an RRC connection reconfiguration message; the handover command message carries a target handover cell identifier and mobility control information.

Step 411: Perform uplink and downlink data back propagation between the source eNB and the target eNB.

Here, the source eNB sends uplink and downlink data of the UE to the target eNB, and the target eNB sends downlink data to the UE through an air interface, so that the data is not in the process of the UE switching the cell. Will be lost.

Step 412: The UE sends a handover confirmation message to the target eNB. Here, after the UE synchronizes to the target handover cell, the handover confirmation message is sent to the target eNB by using an RRC connection reconfiguration complete message.

Step 413: The target eNB sends a handover notification message to the MME to notify the MME to switch the cell completion.

Step 414 to step 415: The MME sends a UE context release command message to the source eNB, and receives a UE context release complete message returned by the source eNB.

Here, the MME sends a UE context release command message to the source eNB to release resources and UE context information of the source eNB side, and returns a UE context release complete message to the MME after the release is completed.

FIG. 5 is a schematic flowchart of a cell handover method according to a fifth embodiment of the present invention. The second embodiment is a cell handover method based on an X2 interface. As shown in FIG. 5, the method includes the following steps: Step 501 to Step 503: Source The eNB sends a radio resource control connection reconfiguration message to the UE, and receives the radio resource control connection reconfiguration complete message returned by the UE, and receives the measurement report returned by the UE.

Step 504: The source eNB filters the neighboring cells in the neighboring cell list carried by the measurement report, and groups the neighboring cells according to the home base station, and prioritizes the neighboring cell groups according to the measurement result, and selects the neighbor with the highest priority. At least one neighboring cell in the cell group is used as a candidate cell.

Step 505: The source eNB sends a handover request message to the target eNB.

Here, the handover request message carries a candidate cell list, and the candidate cell list includes the at least one candidate cell.

Step 506: The target eNB acquires the radio resource measurement result, and sorts the candidate cell list carried in the handover request message according to the measurement result, and selects the candidate cell with the lightest load as the target handover cell to perform handover preparation.

Step 507: The target eNB sends a handover request response message to the source eNB.

Here, after the handover preparation of the target eNB is successful, the handover request response message is sent to the source eNB, where the handover request response message carries the target handover cell identifier and the mobility control information.

Step 508: The source eNB sends a handover command message to the UE.

Here, the source eNB sends the handover command message to the UE through an RRC connection reconfiguration message; the handover command message carries a target handover cell identifier and mobility control information.

Step 509: Perform uplink and downlink data back propagation between the source eNB and the target eNB.

Here, the source eNB sends the uplink and downlink data of the UE to the target eNB, and the target eNB sends the downlink data to the UE through the air interface, so that the UE does not lose data during the handover process.

Step 510: The UE sends a handover confirmation message to the target eNB.

Here, after the UE synchronizes to the target handover cell, the handover confirmation message is sent to the target eNB by using an RRC connection reconfiguration complete message. Step 511 to step 512: The target eNB sends a path switch request message to the MME, and receives a path switch request response message returned by the MME.

Step 513: The target eNB sends a UE context release message to the source eNB.

Here, the target eNB sends a UE context release command message to the source eNB to release resources on the source eNB side, UE context information, and the like.

6 is a schematic flowchart of a method for a target base station to obtain a radio resource measurement result according to a sixth embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:

Step 601 to step 602: The RRC sublayer sends a radio resource measurement request message to the MAC sublayer, and receives a radio resource measurement request response message returned by the MAC sublayer. The radio resource measurement request message carries the radio resource measurement object, including a physical resource block (PRB) utilization rate and a measurement period.

Step 603: The MAC sublayer sends a radio resource measurement result to the RRC sublayer.

Here, the MAC sub-layer starts to measure the corresponding measurement object according to the object measurement of the radio resource measurement in the radio resource measurement request message, and periodically reports the radio resource measurement to the RRC sub-layer according to the measurement period carried in the measurement report. Measurement results.

FIG. 7 is a schematic flowchart of a method for acquiring a radio resource measurement result by a target base station according to a seventh embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:

Step 701: The RRC sublayer sends a radio resource measurement indication message to the MAC sublayer.

Here, the RRC sub-layer decision of the target eNB needs to perform radio resource measurement, and sends a radio resource measurement indication message to the MAC sub-layer to indicate that the MAC sub-layer radio resource measurement operation is "started", in the radio resource measurement request message. Objects carrying wireless resources, including

PRB utilization, etc.

Step 702: The RRC sublayer sends a radio source measurement request message to the MAC sublayer, where the radio resource measurement request message is used to request the MAC to send the measurement result of the radio resource measurement. Step 703: The MAC sublayer returns a radio resource measurement result to the RRC sublayer. Step 704: The RRC sublayer sends a radio resource measurement indication message to the MAC sublayer.

Here, the RRC sublayer receives the radio resource measurement result, and the decision needs to stop the radio resource measurement, and sends a radio resource measurement indication message to the MAC sublayer to indicate that the MAC sublayer radio resource measurement operation is "stopped".

The embodiment of the present invention further describes a base station, where the base station serves as a source base station. As shown in FIG. 8, the source base station includes: a first receiving module 81, a grouping module 82, a sorting selection module 83, and a first sending module 84. ; among them,

The first receiving module 81 is configured to receive a measurement report, and send the measurement report to the grouping module 82 and the sorting selection module 83;

The grouping module 82 is configured to group the neighboring cells carried in the measurement report sent by the first receiving module 81 according to the home base station, and send the neighboring cell group to the order selection module 83;

The sorting selection module 83 is configured to prioritize the neighboring cell packets sent by the grouping module 82 according to the measurement report sent by the first receiving module 81, and select the neighboring cell group with the highest priority. Selecting at least one neighboring cell as a candidate cell, and transmitting the information of the at least one candidate cell to the first sending module 84;

The first sending module 84 is configured to send information of the at least one candidate cell sent by the order selection module 83 to the target base station to implement subsequent handover.

Preferably, the order selection module 83 is configured to prioritize the neighboring cell groups according to the RSRP and/or the RSRQ in the measurement report sent by the first receiving module 81, and according to the RSRP and/or The RSRQ prioritizes the neighboring cells in the neighboring cell groups.

Preferably, the order selection module 83 is configured to select at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, at least one The information of the candidate cell is sent to the first sending module 84;

The first sending module 84 is configured to send the information of the at least one candidate cell sent by the order selection module 83 to the target base station by using a handover request message.

Preferably, the first receiving module 81 is further configured to receive a handover request response message sent by the target base station, where the handover request response message carries the lightest candidate cell information; the first sending module 84, It is further configured to send the lightest candidate cell information received by the first receiving module 81 to the UE by using an RRC connection reconfiguration message.

The packet module 82 and the order selection module 83 in the base station may be implemented by a central processing unit (CPU, Central Processing Unit) or a digital signal processor (DSP, Digital Signal Processor) in the base station. Or a programmable gate array (FPGA, Field-Programmable Gate Array); the first transmitting module 84 of the base station may be implemented by a transmitter or a transmitter in the base station in an actual application; A receiving module 81 can be implemented by a receiver or receiver in the base station in practical applications.

It should be understood by those skilled in the art that the functions of the processing modules in the base station of the embodiments of the present invention may be understood by referring to the related description of the foregoing cell handover method, and the processing modules in the base station of the embodiments of the present invention may implement the embodiments of the present invention. The function of the analog circuit is implemented, and can also be implemented by running the software of the function described in the embodiment of the present invention on the smart terminal.

The embodiment of the present invention further describes a base station, where the base station serves as a target base station. As shown in FIG. 9, the target base station includes: an obtaining module 91, a second receiving module 92, a determining module 93, and a switching indication module 94; ,

The obtaining module 91 is configured to acquire the radio resource measurement result of the self cell, and send the radio resource measurement result to the determining module 93;

The second receiving module 92 is configured to receive information of at least one candidate cell sent by the source base station, and send the information of the at least one candidate cell to the determining module 93;

The determining module 93 is configured to perform the wireless resource measurement according to the acquiring module 91. The quantity result is determined from the at least one candidate cell sent by the second receiving module 92 to determine the lightest candidate cell, and the lightest load candidate message is sent to the handover indication module 94; The module 94 is configured to instruct the UE to switch to the candidate cell with the lightest load among the candidate cells sent by the determining module 93.

Preferably, the acquiring module 91 is configured to perform radio resource measurement by using a radio resource control RRC sublayer to indicate that the media access control MAC sublayer is to be measured, and to perform radio resource measurement on the to-be-measured object by using the MAC sublayer. And returning the radio resource measurement result to the RRC sublayer.

Preferably, the handover indication module 94 is further configured to send a handover request response message to the source base station, where the handover request response message carries information of the candidate cell with the lightest load.

The obtaining module 91 and the determining module 93 in the base station may be implemented by a CPU, or a DSP, or an FPGA in the base station in an actual application; the switching indication module 94 in the base station may be used in an actual application. The transmitter or transmitter in the base station is implemented in combination with a CPU, DSP, or FPGA in the base station; the second receiving module 92 in the base station may be used by a receiver or receiver in the base station in practical applications. achieve.

The present invention also describes a cell switching system. FIG. 10 is a schematic structural diagram of a cell switching system according to an embodiment of the present invention. As shown in FIG. 10, the system includes: a source base station 80 and a target base station 90;

The source base station 80 is configured to group the neighboring cells carried in the received measurement report according to the home base station, and prioritize the neighboring cell groups; and select at least one neighboring cell from the neighbor cell group with the highest priority. As a candidate cell, information of at least one candidate cell Send to the target base station 90;

The target base station 90 is configured to acquire a radio resource measurement result of the self cell, and determine, according to the radio resource measurement result, the candidate cell with the lightest load from the received information of the at least one candidate cell sent by the source base station, And instructing the UE to switch to the lightest candidate cell.

Preferably, the source base station 80 is configured to prioritize neighboring cell groups according to RSRP and/or RSRQ in the measurement report, and group the neighboring cells according to the RSRP and/or RSRQ. The neighboring cells are prioritized.

Preferably, the source base station 80 is configured to select at least one neighboring cell as a candidate cell from the highest priority to the lowest priority neighboring cell group, and pass the information of the candidate cell to the handover request message. It is sent to the target base station 90.

Preferably, the target base station 90 is configured to perform radio resource measurement on the MAC sublayer to be measured by the RRC sublayer; perform radio resource measurement on the object to be measured by using the MAC sublayer, and send the radio resource to the RRC sub The layer returns the radio resource measurement result.

Preferably, the target base station 90 is further configured to send a handover request response message to the source base station 80, where the handover request response message carries information of the candidate cell with the lightest load;

The source base station 80 is further configured to receive a handover request response message sent by the target base station 90, where the handover request response message carries the lightest candidate cell information; and the received load is the lightest. The candidate cell information is sent to the UE through an RRC connection reconfiguration message.

The composition of the source base station 80 is as shown in FIG. 8. The composition of the target base station 90 is as shown in FIG. 9. The functions of each unit in the source base station 80 and the target base station 90 are as described above. I won't go into details here.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and flow and/or The combination of the boxes. The computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine such that a process or a process and/or a block diagram of a block or A device that has multiple functions specified in the box.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Industrial Applicability In the embodiment of the present invention, the source base station sends multiple candidate cells to the target base station in parallel, which reduces the handover delay that can only be sent by the multiple candidate cells to the target base station in the prior art. The target base station can select the cell with the best quality and the lowest load to perform the handover preparation, and reduce the risk of the UE dropping the call in the cell handover. Moreover, in the technical solution of the present invention, the interaction load through the X2 interface in the prior art is omitted. The flow of information reduces the complexity of the switching process.

Claims

claims

1. A cell switching method, applied to the source base station, the method includes:

The source base station groups the neighboring cells carried in the received measurement report according to the home base station, and prioritizes the neighboring and differentiated groups;

The source base station selects at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority, and sends the information of the at least one candidate cell to the target base station to implement subsequent handover.

2. The method according to claim 1, wherein the prioritizing the neighboring cell groups includes:

Prioritize the neighboring cell groups according to the reference signal received power RSRP and/or the reference signal received quality RSRQ in the measurement report, and perform priority sorting on the neighboring cells in each of the neighboring cell groups according to the RSRP and/or RSRQ. Prioritize.

3. The method according to claim 2, wherein the selecting at least one neighboring cell from the neighboring cell group with the highest priority as a candidate cell, and sending the information of the candidate cell to the target base station includes:

The source base station selects at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority in descending order of priority, and sends the candidate cell information to the target base station through a handover request message.

4. The method according to claim 1, wherein the method further includes:

The source base station receives a handover request response message sent by the target base station, where the handover request response message carries information about the candidate cell with the lightest load;

5. A cell switching method, applied to a target base station, the method includes: the target base station obtains the radio resource measurement result of its own cell, and sends the radio resource measurement result of at least one candidate cell from the received source base station according to the radio resource measurement result. The lightest load is determined from the information candidate cell, and instructs the UE to switch to the candidate cell with the lightest load.

6. The method according to claim 5, wherein the target base station obtains the radio resource measurement results of its own cell, including:

The radio resource control RRC sublayer of the target base station instructs the media access control MAC sublayer to perform radio resource measurement on the object to be measured;

The MAC sublayer performs radio resource measurement on the object to be measured, and returns the radio resource measurement result to the RRC sublayer.

7. The method according to claim 5, wherein the target base station instructs the UE to switch to the candidate cell with the lightest load, including:

The target base station sends a handover request response message to the source base station, where the handover request response message carries information about the candidate cell with the lightest load.

8. A cell switching method, the method includes:

The source base station selects at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority, and sends the information of the at least one candidate cell to the target base station;

The target base station obtains the radio resource measurement results of its own cell, determines the candidate cell with the lightest load from the received information on at least one candidate cell sent by the source base station according to the radio resource measurement results, and instructs the UE to switch to the load. The lightest candidate cell.

9. A base station, the base station is a source base station, the base station includes: a first receiving module, a grouping module, a sorting selection module and a first sending module; wherein,

The first receiving module is configured to receive a measurement report and send the measurement report to the grouping module and the sorting selection module;

The grouping module is configured to group the neighboring cells carried in the measurement report sent by the first receiving module according to the home base station, and send the neighboring cell grouping to the sorting selection module; The sorting and selection module is configured to prioritize the neighboring cell groups sent by the grouping module according to the measurement report sent by the first receiving module, and select at least one neighboring cell group from the highest priority group. The neighboring cells serve as candidate cells and send the information of at least one candidate cell to the first sending module;

The first sending module is configured to send the information of the at least one candidate cell sent by the ranking selection module to the target base station to implement subsequent handover.

10. The base station according to claim 9, wherein the sorting selection module is configured to prioritize neighbor cell groups according to RSRP and/or RSRQ in the measurement report sent by the first receiving module, And perform priority ordering on neighboring cells in each neighboring cell group according to the RSRP and/or RSRQ.

11. The base station according to claim 10, wherein the ranking selection module is configured to select at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority in order from high to low priority, and will at least The information of one candidate cell is sent to the first sending module; the first sending module is configured to send the information of the at least one candidate cell sent by the ranking selection module to the target base station through a handover request message.

12. The base station according to claim 9, wherein the first receiving module is further configured to receive a handover request response message sent by the target base station, and the handover request response message carries the information of the candidate cell with the lightest load. ;

The first sending module is further configured to send the candidate cell information with the lightest load received by the first receiving module to the UE through an RRC connection reconfiguration message.

13. A base station, the base station is a target base station, the base station includes: an acquisition module, a second receiving module, a determination module and a handover indication module; wherein,

The acquisition module is configured to obtain the wireless resource measurement results of its own cell, and send the wireless resource measurement results to the determination module;

The second receiving module is configured to receive the signal of at least one candidate cell sent by the source base station. information, and sends the information of the at least one candidate cell to the determination module; the determination module is configured to receive the information from the second receiving module according to the radio resource measurement result sent by the acquisition module. Determine the candidate cell with the lightest load among at least one candidate cell, and send the candidate message with the lightest load to the handover indication module;

The handover instruction module is configured to instruct the UE to switch to the candidate cell with the lightest load sent by the determination module.

14. The base station according to claim 13, wherein the acquisition module is configured to instruct the media access control MAC sublayer to perform radio resource measurement on the object to be measured through the radio resource control RRC sublayer; The object to be measured performs radio resource measurement and returns radio resource measurement results to the RRC sublayer.

15. The base station according to claim 13, wherein the handover indication module is further configured to send a handover request response message to the source base station, where the handover request response message carries information about the candidate cell with the lightest load.

16. A cell switching system, the system includes: a source base station and a target base station; wherein, the source base station is configured to group the neighboring cells carried in the received measurement report according to the home base station, and group the neighboring cells Prioritize the groups; select at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority, and send the information of at least one candidate cell to the target base station;

The target base station is configured to obtain the radio resource measurement result of its own cell, determine the candidate cell with the lightest load from the received information of at least one candidate cell sent by the source base station according to the radio resource measurement result, and Instruct the UE to switch to the candidate cell with the lightest load.

17. The system according to claim 16, wherein the source base station is configured to prioritize neighbor cell groups according to the RSRP and/or RSRQ in the measurement report, and to perform priority sorting according to the RSRP and/or RSRQ. Prioritize the neighboring cells in each of the neighboring cell groups.

18. The system according to claim 17, wherein the source base station is configured to select at least one neighboring cell as a candidate cell from the neighboring cell group with the highest priority in order from high to low priority, and select the neighboring cell as the candidate cell. The information of the candidate cell is sent to the target base station through a handover request message.

19. The system according to claim 16, wherein the target base station is configured to instruct the MAC sublayer to perform wireless resource measurement on the object to be measured through the RRC sublayer; and to perform wireless resource measurement on the object to be measured through the MAC sublayer. Resource measurement, and returning radio resource measurement results to the RRC sublayer.

20. The system according to claim 16, wherein the target base station is further configured to send a handover request response message to the source base station, where the handover request response message carries information about the candidate cell with the lightest load;

The source base station is further configured to receive a handover request response message sent by the target base station, where the handover request response message carries information about the candidate cell with the lightest load; and convert the received candidate cell with the lightest load The information is sent to the UE through the RRC connection reconfiguration message.

21. A computer storage medium, the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the cell switching method according to any one of claims 1 to 4.

22. A computer storage medium, the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the cell switching method according to any one of claims 5 to 7.

23. A computer storage medium, the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the cell switching method according to claim 8.