WO2014000478A1

WO2014000478A1 - Cell handover control method, cell handover method, device and system

Info

Publication number: WO2014000478A1
Application number: PCT/CN2013/073166
Authority: WO
Inventors: 季莉
Original assignee: 华为技术有限公司
Priority date: 2012-06-30
Filing date: 2013-03-26
Publication date: 2014-01-03
Also published as: CN103517352B; CN103517352A

Abstract

The embodiments of the present invention provide a cell handover control method, cell handover method, device and system. The method comprises the following steps: having received the message from a mobile terminal which indicates that the signal quality of the current cell can not fulfill a predefined requirements, sending a measurement control message to the mobile terminal including the measurement control parameter of the current cell's intra-frequency neighbor cell which is easier to fulfill the cell handover condition than the predefined measurement parameter; receiving the measurement report from the mobile terminal which is reported after cell measurement based on the measurement control message, and operating cell handover control on the mobile terminal based on the measurement report. The method distributing the measurement control parameter of the current cell's intra-frequency neighbor cell in advance in the embodiments of the present invention lowers the handover condition of the intra-frequency neighbor cell, makes more intra-frequency neighbor cells to be selection objects as a target cell, expands the selection for optimizing cell handover, and reduces unnecessary handover.

Description

Area switching control method, cell switching method, device and system

This application claims the priority of the Chinese Patent Application entitled "Cell Switching Control Method, Cell Switching Method, Device and System", which is filed on June 30, 2012, and the application number is 201210222858. This is incorporated herein by reference. Technical field

The embodiments of the present invention relate to a wireless communication technology, and in particular, to a cell handover control method, a cell handover method, and an apparatus and system.

Background of the Invention A feature of a microcellular network is that it enables a mobile terminal to seamlessly switch from one cell to another. There are many types of cell handover, including soft handover, soft handover, hard handover, and the like. The cell handover is mostly performed by means of the assistance of the mobile terminal, that is, the network side device selects the target cell to perform handover according to the measurement report reported by the mobile terminal. At present, due to the demand of services and the expansion of operators, hybrid network deployment of multi-system multi-band cells is becoming more and more common. How to ensure that mobile terminals can seamlessly switch between these cells becomes an important topic of research.

Generally, the operator's strategy is to allow the mobile terminal to camp on a system or frequency band that provides a higher quality of service, and only switch the mobile terminal if the coverage of the system or frequency band does not provide the quality of service required by the mobile terminal. Go to other systems or bands.

In the process of implementing the embodiments of the present invention, the inventors have found that the measurement control parameter setting of the same frequency switching condition is unreasonable in the prior art, and some of the same-frequency cells that can actually provide wireless services for the mobile terminal are not moved. The terminal reports to the network side, so the network side does not include it in the selection range of the handover, thereby causing unnecessary handover.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a cell handover control method, a cell handover method, and an apparatus and system. An embodiment of the present invention provides a cell handover control method, including:

After receiving the message sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet the predetermined requirement, send a measurement control message to the mobile terminal, where the measurement control message includes the measurement of the same frequency neighboring cell of the current cell. a control parameter, the measurement control parameter is more likely to satisfy a cell handover condition than a preset measurement control parameter, where the preset measurement control parameter is sent at the mobile terminal to indicate that a signal quality of the current cell cannot meet a predetermined requirement. Received by the mobile terminal before the message;

Receiving a measurement report reported by the mobile terminal after performing cell measurement according to the measurement control message, and performing cell handover control on the mobile terminal according to the measurement report.

Another aspect of the embodiments of the present invention provides a cell handover method, including:

Receiving, by the base station, a measurement control message sent by the base station, where the signal indicating that the signal quality of the current cell cannot meet the predetermined requirement, where the measurement control message includes the measurement control parameter of the same-frequency neighboring cell of the current cell, The measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is before the mobile terminal sends a message indicating that the signal quality of the current cell cannot meet the predetermined requirement. Received by the mobile terminal; performing cell measurement according to the measurement control message, and reporting the measurement report of the cell measurement to the base station;

And performing handover to the target cell, where the target cell is determined by the base station according to the measurement report.

The cell switching control apparatus provided by the embodiment of the present invention includes:

a first processing module, configured to send a measurement control message to the mobile terminal after receiving a message that is sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet the predetermined requirement, where the measurement control message includes the current cell The measurement control parameter of the same frequency neighboring area, the measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is sent by the mobile terminal to indicate the current cell Received by the mobile terminal before the signal quality cannot satisfy the predetermined requirement message;

a second processing module, configured to receive a measurement report that is reported by the mobile terminal to perform cell measurement according to the measurement control message;

And a third processing module, configured to perform cell handover control on the mobile terminal according to the measurement report.

The mobile terminal provided by the embodiment of the present invention includes: a fourth processing module, configured to: after receiving, to the base station, a message indicating that the signal quality of the current cell cannot meet the predetermined requirement, receiving the measurement control message sent by the base station, where the measurement control message includes the same frequency of the current cell The measurement control parameter of the neighboring area, the measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is sent by the mobile terminal to indicate that the signal quality of the current cell cannot be Received by the mobile terminal before the message meeting the predetermined requirement is met;

a fifth processing module, configured to perform cell measurement according to the measurement control message, and report the measurement report of the cell measurement to the base station;

And a sixth processing module, configured to perform handover to the target cell, where the target cell is determined by the base station according to the measurement report.

The cell handover system according to the embodiment of the present invention includes the cell handover control device and the mobile terminal, and the cell handover control device and the mobile terminal are wirelessly connected.

The cell handover control method, the cell handover method, and the device and the system provided by the embodiment of the present invention, before the mobile terminal reports the cell measurement result used for the handover decision, the manner of transmitting the measurement control parameter of the intra-frequency neighboring cell of the current cell in advance To reduce the switching conditions of the same-frequency neighboring cell, so that more co-frequency neighboring cells can become the target of the target cell, and the selection range is expanded to optimize cell switching and reduce unnecessary handover.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of cell handover;

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

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

4 is a schematic signaling diagram of a handover optimization embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a cell handover control apparatus according to the present invention; FIG.

6 is a schematic structural diagram of an embodiment of a mobile terminal according to the present invention;

FIG. 7 is a schematic structural diagram of an embodiment of a cell switching system according to the present invention.

DETAILED DESCRIPTION A microcellular network is characterized in that a mobile terminal can be seamlessly switched from a primary cell to a target cell, wherein The original cell and the target cell may be the same frequency neighboring cell, and may of course be an inter-frequency/different system neighboring cell. As shown in FIG. 1, the mobile terminal moves to the edge of cell A of long term evolution (LTE), and the condition of handover in the cell A system is that the intra-frequency neighboring cell is higher than the current cell level by three. Decibel (dB), and the mobile terminal has not detected the same-frequency neighboring area that satisfies the switching condition; after the level falls to a certain threshold, it is necessary to trigger the inter-frequency/differential system measurement to ensure the normal operation of the service, and the mobile terminal according to The measurement of the base station indicates that the inter-frequency/different system neighboring area measurement is performed, and the inter-frequency/different system neighboring area coverage is better, and the mobile terminal quickly detects the cell that meets the handover condition of the inter-frequency/different system, and performs cell handover.

Due to the unreasonable setting of the measurement control parameters of the intra-frequency switching conditions in the prior art, some occurrences of unnecessary switching are caused. The embodiments of the present invention provide a solution to reduce the measurement control parameters of the intra-frequency neighboring cell of the current cell before the mobile terminal reports the cell measurement result for the handover decision. To reduce the handover condition of the same-frequency neighboring cell, so that more co-frequency neighboring cells can become the target of the target cell, and the selection range is expanded to optimize the cell handover.

2 is a schematic flowchart of a cell handover control method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:

Step 101: After receiving a message sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet the predetermined requirement, send a measurement control message to the mobile terminal.

The mobile terminal resides in the process of the current cell performing the wireless service. Due to the mobility of the mobile terminal, it may gradually move to the edge position of the current cell. At this time, the signal strength at the edge position is limited due to the limited coverage of the current cell. If the signal quality of the current cell cannot meet the predetermined requirements, the neighboring cell needs to be measured to request the cell handover to report the measurement to the base station of the current cell.

The mobile terminal can continuously perform cell measurement on the same-frequency neighboring cell of the current cell in the process of detecting that the current cell signal quality is reduced, and report the information of the same-frequency neighboring cell that meets the switching condition of the same-frequency neighboring cell to the base station. The switching condition of the intra-frequency neighboring cell is as follows: the base station sends the mobile terminal to the mobile terminal before the step, for example, the switching condition of the same-frequency neighboring cell is event A3 (Event A3), the threshold is 3 dB, and the triggering time (Time to Trigger) , TTT ) is 320ms. If the mobile terminal detects the same-frequency neighboring cell that meets the preset switching condition, and reports it to the base station, the base station can switch the mobile terminal to the same-frequency neighboring cell. If the base station does not receive the measurement report reported by the mobile terminal, it indicates that there is no intra-frequency neighboring area that can satisfy the foregoing handover condition in the vicinity of the current cell. Therefore, in the embodiment of the present invention, when the mobile terminal receives the signal for indicating the current cell, After the quality cannot meet the predetermined requirement message, the handover optimization is performed immediately, specifically, sending a measurement control message to the mobile terminal, so that the mobile terminal controls the message according to the Indicates to perform cell measurement.

In the embodiment of the present invention, the measurement control message includes a measurement control parameter of a co-frequency neighboring cell of the current cell, where the measurement control parameter includes a trigger time TTT, and an intra-frequency handover threshold, and the measurement control parameter is more than a preset measurement control parameter. It is easy to meet the cell handover condition; the preset measurement control parameter is received by the mobile terminal before the mobile terminal sends a message indicating that the signal quality of the current cell cannot meet the predetermined requirement, that is, the The switching condition corresponding to the measurement control parameter is easier to satisfy the switching condition than the switching condition corresponding to the preset measurement control parameter (which may also be referred to as: a predetermined switching condition of the same-frequency neighboring area). In the embodiment of the present invention, the measurement control parameters of the same-frequency neighboring cell of the current cell are re-set in the embodiment of the present invention, because the same-frequency neighboring cell that meets the condition is not detected according to the previously-prescribed handover condition of the same-frequency neighboring cell. And the measurement control parameter that is re-issued is easier to satisfy the cell handover condition than the preset measurement control parameter, and the purpose is to increase the detection range of the same-frequency neighboring area, so that the same-frequency neighboring area that cannot satisfy the previously preset switching condition can satisfy the condition. Reset the lower switching conditions. For example, the intra-frequency handover threshold may be a threshold of a measurement event as defined in the protocol 3GPP TS 36.331, such as a threshold of an A3 event. For example, if the preset switching condition of the intra-frequency neighboring cell is that the A3 event threshold is 3 dB and the TTT is 320 ms, the A3 event threshold included in the measurement control message of this configuration is 2 dB, and the TTT is 160 ms. Since the handover condition is reduced, more co-frequency neighboring cells will become the target of selection of the target cell, which is more advantageous for completing cell handover.

Step 102: Receive a measurement reported by the mobile terminal after performing cell measurement according to the measurement control message, and perform cell handover control on the mobile terminal according to the measurement report.

After the base station sends the measurement control message to the mobile terminal, the mobile terminal continues to perform cell measurement on the same-frequency neighboring cell according to the measurement control parameter of the same-frequency neighboring cell of the current cell, obtains a measurement report, and reports the measurement report to the base station. . After receiving the measurement report, the base station may perform cell handover control on the mobile terminal according to the content of the measurement report, that is, select a suitable cell as the target cell for the mobile terminal, and control the mobile terminal to switch to the target cell, and complete Cell handover.

The cell handover control method provided by the embodiment of the present invention reduces the measurement control parameters of the intra-frequency neighboring cell of the current cell in advance before the mobile terminal reports the cell measurement result for the handover decision, to reduce the same-frequency neighboring cell. The handover condition enables more co-frequency neighboring cells to become the target of the target cell, and expands the selection range to optimize the cell handover, reducing unnecessary replacement.

In the above embodiment, when the mobile terminal detects the same-frequency neighboring cell that satisfies the condition according to the previously preset switching condition of the same-frequency neighboring cell, the inter-frequency/different system measurement is triggered, and the base station sends the inter-frequency to the mobile terminal. Measurement control parameters of the adjacent system of the different system, the mobile terminal controls according to the measurement of the adjacent frequency zone of the different frequency/different system The parameters are used for cell measurement of the inter-frequency/different system. Therefore, the measurement control parameters of the intra-frequency neighboring cell of the current cell sent by the base station to the mobile terminal in the foregoing method embodiment may be separately sent to the mobile terminal, or may be preferably performed together with the measurement control parameters of the inter-frequency/different system neighboring cell. The measurement control message sent by the base station to the mobile terminal includes the measurement control parameters of the same-frequency neighboring cell of the current cell, and the measurement control parameters of the inter-frequency/different system neighboring cell. Correspondingly, after receiving the measurement control message, the mobile terminal needs to measure the same frequency neighboring area and measure the inter-frequency/different system neighboring area when performing cell measurement. Specifically, the measurement control parameter of the inter-frequency/different system neighboring cell may include measuring a measurement gap (GAP) of the inter-frequency/different system neighboring cell, measuring the frequency point, that is, frequency information of the inter-frequency/different system neighboring cell, and further including satisfying The threshold of the inter-frequency/different system switching condition.

In the foregoing method embodiment, the step of performing cell handover control on the mobile terminal by the base station according to the measurement report of the mobile terminal may specifically include the following situations:

The first case: only the co-frequency neighboring cell satisfies the condition, specifically: if the measurement report includes only one cell measurement information of the same-frequency neighboring cell, the mobile terminal is switched to the same-frequency neighboring cell; The cell measurement information including multiple co-frequency neighboring cells is switched to the same-frequency neighboring cell with the best signal quality.

The second case: only the inter-frequency/different system neighboring area satisfies the condition, specifically: if the measurement report includes only the cell measurement information of the inter-frequency/different system neighboring cell, the mobile terminal is switched to the inter-frequency/different System neighboring area; if the measurement 4 report includes cell measurement information of multiple inter-frequency/different system neighboring cells, the mobile terminal is switched to the inter-frequency/different system neighboring cell with the best signal quality.

The third case: the same frequency neighboring area satisfies the condition, and the different frequency/different system neighboring area satisfies the condition, specifically: if the measurement 4 report includes both the cell measurement information of the same frequency neighboring area, and the different frequency / The cell measurement information of the neighboring cell of the different system, the target cell for cell handover is selected for the mobile terminal according to a preset rule. The preset rule may be that the same-frequency neighboring cell with the best signal quality is used as the target cell, that is, the same-frequency neighboring cell is preferentially selected as the selection object; or, the same-frequency neighboring cell and the inter-frequency/different system neighbor may be selected. The best signal quality in the area is used as the target cell, and all neighboring areas that can satisfy the handover condition are selected as the selection target.

By reducing the processing condition of the switching condition of the same frequency neighboring cell, the method of the present invention can not only optimize the handover, but also can obtain the target cell information for other purposes by expanding the measurement range of the mobile terminal cell.

FIG. 3 is a schematic flowchart of a cell handover method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps: Step 201: After transmitting, to the base station, a message indicating that the signal quality of the current cell cannot meet the predetermined requirement, receiving a measurement control message sent by the base station;

In the method embodiment shown in FIG. 2, after the mobile terminal detects that the signal quality of the current cell cannot meet the subscription requirement, the mobile terminal sends a notification message to the base station. The base station sends a measurement control message to the mobile terminal, where the measurement control message may include measurement control parameters of the same frequency neighboring cell of the current cell, and may also include measurement control parameters of the inter-frequency/different system neighboring cell. As described above, the measurement control parameters of the same-frequency neighboring cell and the measurement control parameters of the inter-frequency/different system neighboring cell may be separately sent or may be included in the measurement control message. The measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is before the mobile terminal sends a message indicating that the signal quality of the current cell cannot meet the predetermined requirement. Received by the mobile terminal, making it easier for more co-frequency neighbors to meet the handover conditions. The measurement control parameters of the same frequency neighboring area may include a measurement trigger time TTT and an intra-frequency switching threshold.

Step 202: Perform cell measurement according to the measurement control message, and report the measurement report of the cell measurement to the base station.

The mobile terminal performs the cell measurement according to the measurement control message, and specifically includes: if the measurement control message includes only the measurement control parameter of the same-frequency neighboring cell of the current cell, the mobile terminal performs only the measurement of the same-frequency neighboring cell; if the measurement control message includes The measurement control parameters of the same-frequency neighboring cell of the current cell also include the measurement control parameters of the inter-frequency/different system neighboring cell, and the mobile terminal not only needs to measure the same-frequency neighboring cell but also the inter-frequency/inter-frequency when performing cell measurement. Measurements are made in the neighborhood of the different system. Specifically, the measurement control parameter of the inter-frequency/different system neighboring cell may include measuring a measurement gap (GAP) of the inter-frequency/different system neighboring cell, measuring the frequency point, that is, frequency information of the inter-frequency/different system neighboring cell, and further including satisfying The threshold of the inter-frequency/different system switching condition.

Step 203: Perform handover to a target cell, where the target cell is determined by the base station according to the measurement report.

The base station selects a target cell according to the measurement report reported by the mobile terminal, and controls the mobile terminal to perform a handover process. The mobile terminal performs handover to the target cell under the control of the base station. The cell handover process of the mobile terminal is a process of the prior art, and details are not described herein again. For the process of selecting a target cell by the base station, refer to the foregoing method embodiment, and details are not described herein again.

In the cell handover method provided by the embodiment of the present invention, the mobile terminal can make more co-frequency neighboring cells become the target of the target cell according to the measurement control parameters of the same-frequency neighboring cell of the current cell that is reset by the base station, and expand the selection range. Optimize cell switching, reducing unnecessary switching.

FIG. 4 is a schematic diagram of signaling of a handover optimization embodiment according to the present invention. As shown in FIG. 4, the method includes the following Steps:

Step 301: The mobile terminal UE reports a measurement event to the base station eNB, where the event indicates that the signal quality of the current cell does not meet the predetermined requirement.

After detecting that the signal quality of the current cell does not satisfy the predetermined requirement, the mobile terminal UE sends a notification message to the base station. The base station involved in each example of the invention may be an eNB (evolved NodeB) in LTE, or a radio node controller (referred to as RNC) in a universal mobile telecommunications service (UMTS), or A base station controller (abbreviation: BSC) in the global system for mobile (GSM).

The measurement event reported by the UE may be reference signal received power (RSRP) in LTE, received signal code power (RSCP) in UMTS, and received level strength in GSM ( Rxlev, received signal level); can also be signal quality, such as reference signal received quality (RSRQ, reference signal received quality) in LTE, E/N0, Ratio of energy per modulating bit to the noise Spectral density), GSM: RxQual, received signal quality. The judgment cell signal quality mentioned in the embodiment of the present invention may be characterized by the above parameters, or may be characterized by other parameters that can reflect the merits of the signal.

The predetermined request may be configured in advance by a signaling message by the current serving base station of the UE.

Step 302: The eNB sends a measurement control message, where the measurement configuration for the inter-frequency/different system, and the measurement control parameter to the same-frequency neighboring cell are included.

Among them, the measurement configuration for the inter-frequency/different system includes the measurement gap (GAP) configuration, the frequency point information, and the conditional threshold that the inter-frequency/different system cell needs to satisfy. The base station sends a measurement control message for the same-frequency neighboring cell. For example, the measurement control parameter of the initially configured intra-frequency neighboring zone is TTT equal to 320 ms, and the A3 threshold is 3 dB, and at this time, the measurement configuration of the inter-frequency/different system is simultaneously performed. The configuration in the same-frequency measurement control message may be TTT equal to 160 ms and A3 threshold is 2 dB. This parameter is easier to satisfy the cell handover condition than the preset measurement control parameter, that is, the same-frequency neighboring region can be more easily satisfied.

Step 303: The UE performs related measurement according to the received measurement control parameter, and reports the measurement report. There are three scenarios:

Casel: Only the co-frequency neighbors satisfy the condition;

Case2: Both the same frequency neighboring zone and the different frequency or different system neighboring zone satisfy the condition;

Case3: Only the inter-frequency or different system neighbors satisfy the condition. Step 304: The eN B performs a handover decision according to the measurement report of the UE.

According to the different measurement reports reported by U E, eN B can be correspondingly switched:

Casel: If the UE only reports the cell measurement information of the same-frequency neighboring cell, the eNB performs the same-frequency neighboring cell as the handover target cell for the same-frequency handover; if the UE reports the cell measurement information of the multiple-frequency neighboring cell, The eNB may select the best cell of RSRP or RSRQ as the handover target cell for intra-frequency handover.

Case2: If the UE simultaneously extracts the cell measurement information of the same-frequency neighboring cell and the cell measurement information of the inter-frequency neighboring cell, or the cell measurement information of the same-frequency neighboring cell and the cell measurement information of the neighboring cell of the different system, the eNB according to the UE In the reported measurement report, the signal quality of the co-frequency neighboring area and the signal quality of the inter-frequency/different system neighboring area are judged whether the same frequency switching is performed, or the inter-frequency different system switching is performed. For example, if the signal reception strength or the signal reception quality of the inter-frequency or different system neighboring area is higher than the set threshold by more than 3 dB, it means that the signal quality of the inter-frequency or different system is good, or the inter-frequency or different system switching is performed. .

Case 3: If the UE only reports the cell measurement information of the inter-frequency or different system neighboring cell, the eNB initiates the handover to the inter-frequency or different-system neighboring cell; if the UE reports the cell measurement of multiple inter-frequency or different-system neighboring cells For information, the eNB may select a cell with the best received signal strength or the signal receiving quality of the inter-frequency or different system neighboring cell as the handover target cell for inter-frequency or different system switching.

The cell handover optimization method provided by the embodiment of the present invention reduces the measurement control parameter of the intra-frequency neighboring cell of the current cell in advance before the mobile terminal reports the cell measurement result for performing the inter-frequency/different system handover decision. The switching conditions of the same-frequency neighboring cell enable more co-frequency neighboring cells to become the target of the target cell, and the selection range is expanded to optimize cell switching, thereby reducing unnecessary handover.

It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be performed by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

5 is a schematic structural diagram of an embodiment of a cell handover control apparatus according to the present invention. As shown in FIG. 5, the cell handover control apparatus includes a first processing module 1 1 , a second processing module 12 , and a third processing module 13 . The module 1 is configured to send a measurement control message to the mobile terminal after receiving a message that is sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet the predetermined requirement, where the measurement control message includes the same-frequency neighbor of the current cell. The measurement control parameter of the area, the measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is sent by the mobile terminal to indicate that the signal quality of the current cell cannot be satisfied. Before booking the requested message, The second processing module 12 is configured to receive a measurement report reported by the mobile terminal to perform cell measurement according to the measurement control message, and the third processing module 13 is configured to perform cell handover control on the mobile terminal according to the measurement report.

Specifically, after receiving the message sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet the predetermined requirement, the first processing module 11 of the base station may immediately perform handover optimization, specifically, send a measurement control message to the mobile terminal, and let the mobile The terminal performs cell measurement according to the indication of the measurement control message. In the embodiment of the present invention, the measurement control message includes a measurement control parameter of a co-frequency neighboring cell of the current cell, where the measurement control parameter includes a trigger time and an intra-frequency handover threshold, and the measurement control parameter is more easily satisfied than the preset measurement control parameter. The cell handover condition, that is, the handover condition corresponding to the measurement control parameter is lower than the handover condition of the predetermined intra-frequency neighboring cell, and the purpose is to increase the detection range of the same-frequency neighboring cell, so that the same-frequency neighboring zone that cannot meet the previous preset handover condition is not satisfied. A relatively low switching condition that can be reset. After the first processing module 1 sends the measurement control message to the mobile terminal, the mobile terminal continues to perform cell measurement on the same-frequency neighboring cell according to the measurement control parameter of the same-frequency neighboring cell of the current cell, and obtains a measurement report, and the The measurement report is reported to the base station. After receiving the measurement report, the second processing module 12 of the base station controls the mobile terminal to perform cell handover according to the content of the measurement report, that is, the mobile terminal selects a suitable cell as the target cell, and The mobile terminal is controlled to switch to the target cell to complete cell handover.

In the above embodiment of the cell handover control apparatus, the third processing module includes any one of the first processing unit, the second processing unit, the third processing unit, the fourth processing unit, and the fifth processing unit, or a combination thereof, to adapt to the processing. The measurement only tells the different content included. Specifically, the first processing unit is configured to: if the measurement report includes only one cell measurement information of the same frequency neighboring cell, switch the mobile terminal to the one same-frequency neighboring cell; If the measurement report includes a plurality of cell measurement information of the same frequency neighboring cell, the mobile terminal is switched to the same frequency neighboring cell with the best signal quality; and the third processing unit is configured to perform the measurement. The report includes only one cell measurement information of the inter-frequency/different system neighboring cell, and then the mobile terminal is switched to the inter-frequency/different system neighboring cell; and the fourth processing unit is configured to: if the measurement report includes multiple The cell measurement information of the inter-frequency/different system neighboring cell switches the mobile terminal to the inter-frequency/different system neighboring cell with the best signal quality; and the fifth processing unit is configured to include the same in the measurement report The cell measurement information of the frequency neighboring area further includes cell measurement information of the inter-frequency/different system neighboring cell, and the target cell for cell handover is selected for the mobile terminal according to a preset rule. The preset rule includes: using the same-frequency neighboring cell with the best signal quality as the target cell, or using the best signal quality in the same-frequency neighboring zone and the inter-frequency/different system neighboring zone as the target. Community. The cell handover control apparatus provided by the embodiments of the present invention reduces the intra-frequency neighboring cell by transmitting the measurement control parameters of the intra-frequency neighboring cell of the current cell in advance before the mobile terminal reports the cell measurement result for the handover decision. The handover condition enables more co-frequency neighboring cells to be the target of selection of the target cell, expands the selection range to optimize cell handover, and reduces unnecessary handover.

For the functions of the function modules in the cell switching control device provided by the embodiments of the present invention, refer to the foregoing method embodiments, and details are not described herein.

FIG. 6 is a schematic structural diagram of an embodiment of a mobile terminal according to the present invention. As shown in FIG. 6, the mobile terminal includes a fourth processing module 21, a fifth processing module 22, and a sixth processing module 23, where the fourth processing module 21 is configured to Receiving, by the base station, a message indicating that the signal quality of the current cell cannot meet the predetermined requirement, and receiving a measurement control message sent by the base station, where the measurement control message includes a measurement control parameter of the same-frequency neighboring cell of the current cell, where The measurement control parameter is more likely to satisfy the cell handover condition than the preset measurement control parameter, where the preset measurement control parameter is before the mobile terminal sends a message indicating that the signal quality of the current cell cannot meet the predetermined requirement, The fifth processing module 22 is configured to perform cell measurement according to the measurement control message, and report the measurement report to the base station; the sixth processing module 23 is configured to perform handover to the target cell, where The target cell is determined by the base station according to the measurement report.

Specifically, after the mobile terminal detects that the signal quality of the current cell cannot meet the reservation requirement, the mobile terminal sends a notification message to the base station. The base station sends a measurement control message to the mobile terminal, where the measurement control message may include measurement control parameters of the same-frequency neighboring cell of the current cell, and may also include measurement control parameters of the inter-frequency/different system neighboring cell, where the measurement of the same-frequency neighboring cell The switching condition corresponding to the control parameter is lower than the switching condition of the predetermined intra-frequency neighboring cell, so that more co-frequency neighboring cells are more likely to satisfy the switching condition. The measurement control parameters of the same frequency neighboring region may include a TTT, and an event measurement threshold. After the fourth processing module 21 receives the measurement control message, the fifth processing module 22 performs the cell measurement according to the measurement control message, specifically, if the measurement control message includes only the measurement control parameters of the intra-frequency neighboring cell of the current cell, the mobile terminal only Performing measurement of the same-frequency neighboring cell; if the measurement control message includes the measurement control parameter of the same-frequency neighboring cell of the current cell, and the measurement control parameter of the inter-frequency/different system neighboring cell, the mobile terminal performs the cell measurement. To measure the same frequency neighboring area, it is necessary to measure the inter-frequency/different system neighboring area. Specifically, the measurement control parameter of the inter-frequency/different system neighboring cell may include measuring a measurement gap (GAP) of the inter-frequency/different system neighboring cell, measuring the frequency point, that is, frequency information of the inter-frequency/different system neighboring cell, and further including satisfying The threshold of the inter-frequency/different system switching condition. The base station selects a target cell for cell handover according to the measurement report reported by the mobile terminal, and controls the mobile terminal to perform a cell handover procedure. The mobile terminal performs handover to the target cell under the control of the base station, and the mobile terminal The sixth processing module 23 performs a process of switching to the target cell.

According to the mobile terminal provided by the embodiment of the present invention, according to the measurement control parameters of the intra-frequency neighboring cell of the current cell that is reset by the base station, more co-frequency neighboring cells can be selected as the target cell, and the selection range is expanded to optimize the cell handover. Reduce unnecessary switching.

FIG. 7 is a schematic structural diagram of an embodiment of a cell handover system according to the present invention. As shown in FIG. 7, the cell handover system includes a wirelessly connected cell handover control apparatus 1 and a mobile terminal 2, wherein the mobile terminal 2 detects the signal quality of the current cell. When the cell handover is required, the cell handover control device 1 sends a notification message, and the cell handover control device 1 performs handover optimization, specifically, to the measurement control message, where the measurement control message may include the measurement of the intra-frequency neighboring cell of the current cell. The control parameter may also include a measurement control parameter of the inter-frequency/different system neighboring cell, where the measurement control message includes a measurement control parameter of the same-frequency neighboring cell of the current cell, and the measurement control parameter is more than a preset measurement. The control parameter is more likely to satisfy the cell handover condition, that is, the handover condition corresponding to the measurement control parameter of the same-frequency neighboring area is lower than the switching condition of the predetermined intra-frequency neighboring area, so as to increase the detection range of the same-frequency neighboring area, so that the previous preset cannot be satisfied. The same frequency neighboring zone of the switching condition can satisfy the reset of the lower switching Pieces. The preset measurement control parameter is received by the mobile terminal before the mobile terminal transmits a message indicating that the signal quality of the current cell cannot meet the predetermined requirement. The mobile terminal 2 performs the cell measurement according to the measurement control parameter, and reports the measurement report, and the cell handover control device 1 performs cell handover control on the mobile terminal 2 according to the measurement report.

The cell handover control apparatus and the mobile terminal involved in the cell handover system according to the embodiment of the present invention may use the base station and the mobile terminal provided by the foregoing apparatus embodiments, and the specific structures and functions thereof are not described herein again. The handover optimization method involved in the system can participate in the processes of the foregoing method embodiments, and details are not described herein again.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A cell handover control method, characterized by including:

After receiving a message sent by the mobile terminal indicating that the signal quality of the current cell cannot meet the predetermined requirements, a measurement control message is sent to the mobile terminal, where the measurement control message includes measurements of co-frequency neighboring cells of the current cell. Control parameters, the measurement control parameters are more likely to satisfy the cell switching conditions than the preset measurement control parameters. The preset measurement control parameters are sent by the mobile terminal to indicate that the signal quality of the current cell cannot meet predetermined requirements. The message was previously received by the mobile terminal;

Receive a measurement report reported by the mobile terminal after performing cell measurement according to the measurement control message, and perform cell switching control on the mobile terminal according to the measurement report.

2. The cell handover control method according to claim 1, characterized in that the measurement control message also includes measurement control parameters of inter-frequency/inter-system neighboring cells.

3. The cell handover control method according to claim 1 or 2, characterized in that the measurement control parameters of the same-frequency neighboring cell include a trigger time TTT and a same-frequency handover threshold.

4. The cell handover control method according to claim 2, wherein the measurement control parameters of inter-frequency/inter-system neighboring cells include measurement gaps, measurement frequency points for measuring inter-frequency/inter-system neighboring cells, and The threshold value that satisfies the switching condition.

5. The cell switching control method according to claim 1, wherein the performing cell switching control on the mobile terminal according to the measurement report includes:

If the measurement report only includes cell measurement information of one same-frequency neighboring cell, then switch the mobile terminal to the one same-frequency neighboring cell;

If the measurement report includes cell measurement information of multiple co-frequency neighboring cells, the mobile terminal is switched to the co-frequency neighboring cell with the best signal quality.

6. The cell switching control method according to claim 1 or 2, wherein the cell switching control of the mobile terminal according to the measurement report includes:

If the measurement report only includes cell measurement information of one inter-frequency/inter-system neighboring cell, then switch the mobile terminal to the inter-frequency/inter-system neighboring cell;

If the measurement report includes cell measurement information of multiple inter-frequency/inter-system neighboring cells, then switch the mobile terminal to the inter-frequency/inter-system neighboring cell with the best signal quality; If the measurement report includes not only cell measurement information of same-frequency neighboring cells but also inter-frequency/inter-system neighboring cell information, a target cell is selected for the mobile terminal according to preset rules.

7. The cell handover control method according to claim 6, wherein the preset rules include using the same-frequency neighboring cell with the best signal quality as the target cell, or using the same-frequency neighboring cell as the target cell. and the one with the best signal quality among inter-frequency/inter-system neighboring cells is used as the target cell.

8. A cell switching method, characterized by including:

After sending a message to the base station indicating that the signal quality of the current cell cannot meet the predetermined requirements, receiving a measurement control message sent by the base station, where the measurement control message includes measurement control parameters of co-frequency neighboring cells of the current cell, The measurement control parameters are more likely to satisfy cell switching conditions than preset measurement control parameters. The preset measurement control parameters are before the mobile terminal sends a message indicating that the signal quality of the current cell cannot meet predetermined requirements. Received by the mobile terminal; Perform cell measurement according to the measurement control message, and report the measurement report of the cell measurement to the base station;

Handover is performed to a target cell, where the target cell is determined by the base station based on the measurement report.

9. The cell switching method according to claim 8, characterized in that the measurement control message also includes measurement control parameters of inter-frequency/inter-system neighboring cells.

10. The cell switching method according to claim 8 or 9, wherein the measurement control parameters of the same-frequency neighboring cell include a trigger time TTT and a same-frequency switching threshold.

1 1. A cell switching control device, characterized in that it includes:

The first processing module is configured to send a measurement control message to the mobile terminal after receiving a message sent by the mobile terminal indicating that the signal quality of the current cell cannot meet the predetermined requirements. The measurement control message includes the current cell. The measurement control parameters of the same-frequency neighboring cells are more likely to meet the cell handover conditions than the preset measurement control parameters. The preset measurement control parameters are used to indicate the current cell when the mobile terminal sends them. The signal quality cannot meet the predetermined requirements before the message is received by the mobile terminal;

The second processing module is configured to receive a measurement report reported by the mobile terminal for cell measurement according to the measurement control message;

A third processing module, configured to perform cell switching control on the mobile terminal according to the measurement report.

12. The cell switching control device according to claim 11, characterized in that: the first The three processing modules include a first processing unit and/or a second processing unit, where:

The first processing unit is configured to switch the mobile terminal to the one same-frequency neighboring cell if the measurement report only includes cell measurement information of one same-frequency neighboring cell;

The second processing unit is configured to switch the mobile terminal to the same-frequency neighboring cell with the best signal quality if the measurement report includes cell measurement information of multiple co-frequency neighboring cells.

13. The cell switching control device according to claim 11 or 12, characterized in that the third processing module further includes any one of a third processing unit, a fourth processing unit and a fifth processing unit or Its combination, where:

The third processing unit is configured to switch the mobile terminal to the inter-frequency/inter-system neighboring cell if the measurement report only includes cell measurement information of one inter-frequency/inter-system neighboring cell;

The fourth processing unit is configured to switch the mobile terminal to the inter-frequency/inter-system neighboring cell with the best signal quality if the measurement report includes cell measurement information of multiple inter-frequency/inter-system neighboring cells. ;

The fifth processing unit is configured to, if the measurement report includes not only the cell measurement information of the same-frequency neighboring cells but also the cell measurement information of the inter-frequency/inter-system neighboring cells, according to the preset rules, provide the mobile The terminal selects the target cell.

14. The cell switching control device according to claim 13, wherein the preset rules include using the same-frequency neighboring cell with the best signal quality as the target cell, or using the same-frequency neighboring cell as the target cell. and the one with the best signal quality among inter-frequency/inter-system neighboring cells is used as the target cell.

15. A mobile terminal, characterized by: including:

The fourth processing module is configured to receive a measurement control message sent by the base station after sending a message indicating that the signal quality of the current cell cannot meet the predetermined requirements to the base station, where the measurement control message includes the same frequency of the current cell. Measurement control parameters of neighboring cells. The measurement control parameters are more likely to satisfy cell switching conditions than the preset measurement control parameters. The preset measurement control parameters are sent by the mobile terminal to indicate that the signal quality of the current cell is insufficient. Received by the mobile terminal before the message meets the predetermined requirements;

The sixth processing module is used to perform handover to a target cell, where the target cell is determined by the base station based on the measurement report.

16. A cell switching system, characterized in that it includes a cell switching control device as claimed in any one of claims 11 to 14, and a mobile terminal as claimed in claim 15, said cell switching control device Set up a wireless connection with the mobile terminal