CN105228194B - A kind of cell selecting method and device - Google Patents

Abstract

Embodiments of the present invention provide a cell selection method and device, which relate to the communication field, and can recover the rate of the user equipment through carrier aggregation in time after the user equipment performs intra-frequency handover, and improve the peak rate of a single user and the capacity of the LTE-A system. receiving the A3 event measurement report and the A6 event measurement report sent by the user equipment, obtaining each first difference, and judging that each first difference is greater than the A3 event threshold; according to each sum value, determining the target primary cell, the The sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, and the secondary cell within the coverage of the primary cell has the same frequency and the same number as the current secondary cell; A first radio resource control connection reconfiguration message, where the first radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target primary cell. It is used for user equipment to switch cells.

Description

A cell selection method and device

technical field

The present invention relates to the communication field, in particular to a cell selection method and device.

Background technique

Carrier aggregation (full English name: Carrier Aggregation, English abbreviation: CA) is a technology used to increase the transmission bandwidth in the Long Term Evolution (English full name: Long Term Evolution Advanced, English abbreviation: LTE-A) system, which can effectively improve single User peak rate and capacity of LTE-A system. As shown in Figure 1, the carrier aggregation network includes an evolved base station (English full name: evolved Node B, English abbreviation: eNB) 1, an evolved base station 2, an evolved base station 3, and user equipment (English full name: User Experience, English abbreviation : UE), and the micro base station 1 within the coverage of the evolved base station 1, the micro base station 2 within the coverage of the evolved base station 2, and the micro base station 3 within the coverage of the evolved base station 3. Wherein, the coverage of the evolved base station 1 is a cell (cell) 11, the frequency of the cell 11 is f ₁ , the coverage of the micro base station 1 is a cell 12, the frequency of the cell 12 is f ₂ , and the coverage of the cell 12 is in the cell 11 Within the coverage area of , cell 11 and cell 12 form a carrier aggregation cell pair; the coverage area of evolved base station 2 is cell 21, and the frequency of cell 21 is f ₁ , the coverage area of micro base station 2 is cell 22, and the frequency of cell 22 is f ₂ , the coverage of cell 22 is within the coverage of cell 21, and cell 21 and cell 22 form a carrier aggregation cell pair; the coverage of evolved base station 3 is cell 31, the frequency of cell 31 is f ₁ , and the The coverage area is cell 32 , the frequency of cell 32 is f ₂ , the coverage area of cell 32 is within the coverage area of cell 31 , and cell 31 and cell 32 form a carrier aggregation cell pair. The frequency f ₁ is the primary carrier, the cell with the frequency f ₁ is the primary cell, the frequency f ₂ is the secondary carrier, and the cell with the frequency f ₂ is the secondary cell. When the difference between frequency f ₁ and frequency f ₂ is small, the coverage overlap between the cell with frequency f ₁ and the cell with frequency f ₂ is relatively large; when the difference between frequency f ₁ and frequency f ₂ is large, the coverage with frequency f ₁ The coverage overlap between cells with frequency f ₂ is small. And the edges of the 6 cells have overlapping areas that overlap with each other.

In the prior art, when the user equipment performs intra-frequency handover, only the signal quality from the user equipment to the primary cell is measured through the A3 event, and the signal quality from the user equipment to the secondary cell is not measured. For example, when the user equipment is attached to the cell 11 and moves from the coverage area of the cell 11 and the cell 12 to the overlapping area, the user equipment measures the signal quality from the user equipment to the cell 21 and the signal quality from the user equipment to the cell 11 through the A3 event The difference is greater than the A3 event threshold α ₃ , which satisfies the A3 event. At the same time, the signal quality of the cell 31 also meets the A3 event, and is smaller than the signal quality of the cell 21. The user equipment sends the A3 event measurement report to the base station 1, and the user equipment according to the base station 1 sends an indication of the Radio Resource Control Connection Reconfiguration message (RadioResource Control Connection Reconfiguration) to perform intra-frequency handover from cell 11 to cell 21. After the handover, the user equipment will measure the signal quality of cell 22. When the user equipment arrives at the cell When the signal quality of 22 is greater than the A2 event threshold value, send the A2 event measurement report to base station 1, then the user equipment configures cell 22 as the secondary cell of the user equipment according to the indication of the radio resource control connection reconfiguration message sent by base station 1, otherwise, Cell 22 is not configured as a secondary cell for the user equipment until the signal quality of cell 22 satisfies the A2 event, however, the signal quality of cell 32 is better than that of cell 22, so cell 31 and cell 32 can be compared with cell 21 and cell 22 Provide better signal quality for the user equipment. Therefore, the user equipment performs co-frequency handover only based on the measured signal quality from the user equipment to the primary cell, resulting in that the user equipment cannot be recovered in time through carrier aggregation after the user equipment performs co-frequency handover rate, as well as the problem of improving the peak rate of a single user and the capacity of the LTE-A system.

Contents of the invention

Embodiments of the present invention provide a cell selection method and device, which can restore the rate of the user equipment through carrier aggregation in time after the user equipment performs intra-frequency handover, and improve the peak rate of a single user and the capacity of the LTE-A system.

In order to achieve the above object, the technical solution adopted in the embodiment of the present invention is:

In the first aspect, a cell selection method is provided, which is applied to a base station, including:

receiving the A3 event measurement report and the A6 event measurement report sent by the user equipment, the A3 event measurement report including the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell, the A6 The event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, the user equipment is registered in the current primary cell, and the current secondary cell is Secondary cells within the coverage of the current primary cell, the user equipment has been configured with the multiple current secondary cells, the current primary cell and the multiple current secondary cells form a carrier aggregation cell pair, and the secondary cells are A secondary cell within the coverage of the primary cell, where the primary cell and the secondary cell within the coverage of the primary cell form a carrier aggregation cell pair;

Obtain each first difference, where the first difference is the difference between the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the current primary cell;

judging that each of the first differences is greater than the A3 event threshold;

Determine the target primary cell according to each sum value, the sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, and the secondary cell within the coverage of the primary cell The same frequency point and the same number as the current secondary cell;

Sending a first radio resource control connection reconfiguration message to the user equipment, where the first radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target primary cell.

In a second aspect, a base station is provided, including:

The receiving unit is configured to receive the A3 event measurement report and the A6 event measurement report sent by the user equipment, the A3 event measurement report including the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell Signal quality, the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, the user equipment is registered in the current primary cell, so The current secondary cell is a secondary cell within the coverage of the current primary cell, the user equipment has been configured with the multiple current secondary cells, the current primary cell and the multiple current secondary cells form a carrier aggregation cell pair, The secondary cell is a secondary cell within the coverage of the primary cell, and the primary cell and the secondary cell within the coverage of the primary cell form a carrier aggregation cell pair;

A processing unit, configured to obtain each first difference, where the first difference is the difference between the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the current primary cell;

The processing unit is further configured to determine that each of the first differences is greater than the A3 event threshold;

The processing unit is further configured to determine the target primary cell according to each sum value, the sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, and the primary cell The secondary cell within the coverage of the cell has the same frequency and the same number as the current secondary cell;

A sending unit, configured to send a first radio resource control connection reconfiguration message to the user equipment, where the first radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target main cell.

In the cell selection method and device provided by the embodiments of the present invention, compared with the prior art, the user equipment performs intra-frequency handover only according to the content of the A3 event measurement report, resulting in that the user equipment cannot be restored in a timely manner through carrier aggregation after the user equipment performs intra-frequency handover. The rate of the equipment, and the problem of improving the peak rate of a single user and the capacity of the LTE-A system. In the cell selection method of the present invention, firstly, the A3 event measurement report and the A6 event measurement report are received, and the A3 event measurement report includes the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell. The signal quality of the cell, the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, and then judges the signal quality of the user equipment to each primary cell The difference between the signal quality and the signal quality from the user equipment to the current primary cell is greater than the A3 event threshold; according to the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, determine the target Primary cell: sending a first radio resource control connection reconfiguration message to the user equipment, instructing the user equipment to switch from the current primary cell to the target primary cell, so that the user can use the first radio resource control connection reconfiguration message After handover to the target handover cell, the primary cell and the secondary cell can be aggregated through the carrier aggregation technology in time, recovering the rate of the user equipment, and improving the peak rate of a single user and the capacity of the LTE-A system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 provides a schematic diagram of a carrier aggregation network in the prior art;

FIG. 2 is a flow chart of a cell selection method provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another cell selection method provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a carrier aggregation network provided by an embodiment of the present invention;

FIG. 5 is a flowchart of another cell selection method provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a base station provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

An embodiment of the present invention provides a method for cell selection, which is applied to a base station, as shown in FIG. 2 , including:

Step 101, receiving the A3 event measurement report and the A6 event measurement report sent by the user equipment.

The A3 event measurement report includes the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell, and the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells Signal quality and signal quality from the user equipment to multiple current secondary cells, the user equipment is registered in the current primary cell, the current secondary cell is a secondary cell within the coverage of the current primary cell, and the user The device has configured the multiple current secondary cells, the current primary cell and the multiple current secondary cells form a carrier aggregation cell pair, the secondary cell is a secondary cell within the coverage of the primary cell, and the primary cell A carrier aggregation cell pair is formed with the secondary cell within the coverage of the primary cell.

Step 102. Obtain each first difference, where the first difference is the difference between the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the current primary cell.

Step 103, judging that each of the first differences is greater than the A3 event threshold.

Step 104: Determine the target primary cell according to each sum value, the sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, and the coverage of the primary cell The secondary cell and the current secondary cell have the same frequency and the same number.

Step 105: Send a first radio resource control connection reconfiguration message to the user equipment, where the first radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target primary cell .

Compared with the existing technology, the user equipment only performs co-frequency handover based on the content of the A3 event measurement report, resulting in the inability to restore the rate of the user equipment in a timely manner through carrier aggregation after the user equipment performs co-frequency handover, and to improve the single-user peak rate and LTE -A system capacity problem. In the cell selection method of the present invention, firstly, the A3 event measurement report and the A6 event measurement report are received, and the A3 event measurement report includes the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell. The signal quality of the cell, the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, and then judges the signal quality of the user equipment to each primary cell The difference between the signal quality and the signal quality from the user equipment to the current primary cell is greater than the A3 event threshold; according to the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, determine the target Primary cell: sending a first radio resource control connection reconfiguration message to the user equipment, instructing the user equipment to switch from the current primary cell to the target primary cell, so that the user can use the first radio resource control connection reconfiguration message After handover to the target handover cell, the primary cell and the secondary cell can be aggregated through the carrier aggregation technology in time, recovering the rate of the user equipment, and improving the peak rate of a single user and the capacity of the LTE-A system.

Example 2

An embodiment of the present invention provides a cell selection method, which is applied to the carrier aggregation network shown in FIG. 1 , assuming that the user equipment is registered in cell 11, and the cell 11 is the current primary cell, as shown in FIG. 3 , the method includes :

Step 201, the base station sends a first radio resource control connection reconfiguration message to the user equipment.

The first radio resource control connection reconfiguration message includes an A3 event and an A6 event, and the A3 event is used to instruct the user equipment to measure the signal quality from the user equipment to cell 11 and the signal quality from the user equipment to cell 21, And the signal quality from the user equipment to the cell 31. The A6 event is used to instruct the user equipment to measure the signal quality from the user equipment to cell 12 , the signal quality from the user equipment to cell 22 , and the signal quality from the user equipment to cell 32 .

Step 202, the user equipment sends a first radio resource control connection reconfiguration complete message to the base station.

Assuming that the user equipment moves from the coverage areas of cell 11 and cell 12 to the overlapping area, step 203 to step 2013 are performed.

Step 203, the user equipment sends an A3 event measurement report to the base station.

The user equipment measures the signal quality from the user equipment to the cell 21 and the signal quality from the user equipment to the cell 31 according to the indication of the A3 event, and then sends an A3 event measurement report to the base station, and the A3 event measurement report includes the signal quality from the user equipment to the cell 21 and the signal quality from the user equipment to the cell 31.

Step 204, the user equipment sends an A6 event measurement report to the base station.

The user equipment measures the signal quality from the user equipment to the cell 22 and the signal quality from the user equipment to the cell 32 according to the indication of the A6 event, and then sends an A6 event measurement report to the base station, and the A6 event measurement report includes the signal quality from the user equipment to the cell 22 and the signal quality from the user equipment to the cell 32.

It should be noted that the user equipment may periodically measure the A3 event, and the user equipment may periodically measure the A6 event. The signal quality may be expressed as Reference Signal Received Power (English full name: Reference Signal Receiving Power, English abbreviation: RSRP).

Step 205, the base station acquires the first difference and the second difference.

The first difference may be the difference between the signal quality of the user equipment to the cell 31 and the signal quality of the user equipment to the cell 11, and the difference between the signal quality of the user equipment to the cell 21 and the signal quality of the user equipment to the cell 11 for poor signal quality. The second difference may be the difference between the signal quality of the user equipment to the cell 32 and the signal quality of the user equipment to the cell 12, and the difference between the signal quality of the user equipment to the cell 22 and the signal quality of the user equipment to the cell 12 for poor signal quality.

Step 206, the base station determines that each first difference is greater than the A3 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 21 and the signal quality from the user equipment to cell 11 is greater than the A3 event threshold α ₃ , and the signal quality from the user equipment to cell 21 meets the A3 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 31 and the signal quality from the user equipment to cell 11 is greater than the A3 event threshold α ₃ , and the signal quality from the user equipment to cell 31 meets the A3 event threshold.

The base station can preset the A3 event threshold. The A3 event threshold is set during the network optimization process so that the user equipment can obtain better switching performance, and the specific size is related to the network environment. The third generation partnership (full English name: 3rd Generation Partnership Project, English abbreviation: 3GPP) stipulates that it is between -15-15dB, and the A3 event threshold is usually configured to be greater than 0dB.

Step 207, the base station determines that each second difference is greater than the A6 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 22 and the signal quality from the user equipment to cell 12 is greater than the A6 event threshold α ₆ , and the signal quality from the user equipment to cell 22 meets the A6 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 32 and the signal quality from the user equipment to cell 12 is greater than the A6 event threshold α ₆ , and the signal quality from the user equipment to cell 32 meets the A6 event threshold.

The base station can preset the A6 event threshold. The A6 event threshold can be set during the network optimization process so that the user equipment can obtain better handover performance, and the specific size is related to the network environment. The third generation partnership (full English name: 3rd Generation Partnership Project, English abbreviation: 3GPP) stipulates that it is between -15-15dB, and the A3 event threshold is usually configured to be greater than 0dB.

It should be noted that, if the first difference is less than or equal to the A3 event threshold, the base station continues to perform A3 event measurement on the primary cell. If the second difference is less than or equal to the A6 event threshold, the base station continues to perform A6 event measurement on the primary cell.

Step 208 , the base station judges whether the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is greater than the sum of the signal quality of the cell 31 and the signal quality of the cell 32 .

When the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is greater than the sum of the signal quality of the cell 31 and the signal quality of the cell 32 , step 209 is performed.

When the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is smaller than the sum of the signal quality of the cell 31 and the signal quality of the cell 32 , step 2010 is performed.

When the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is equal to the sum of the signal quality of the cell 31 and the signal quality of the cell 32 , step 2011 is executed.

Step 209, the base station determines that the cell 21 is the target primary cell.

Step 2010, the base station determines that the cell 31 is the target primary cell.

Step 2011 , the base station determines the target primary cell according to the signal quality from the user equipment to the cell 21 and the signal quality from the user equipment to the cell 31 .

When the difference between the signal quality from user equipment to cell 21 and the signal quality from user equipment to cell 11 is greater than the difference between the signal quality from user equipment to cell 31 and the signal quality from user equipment to cell 11, determine cell 21 as the target primary cell.

When the difference between the signal quality from user equipment to cell 21 and the signal quality from user equipment to cell 11 is smaller than the difference between the signal quality from user equipment to cell 31 and the signal quality from user equipment to cell 11, determine cell 31 as the target primary cell.

It should be noted that when the difference between the signal quality from the user equipment to cell 21 and the signal quality from the user equipment to cell 11 is equal to the difference between the signal quality from the user equipment to cell 31 and the signal quality from the user equipment to cell 11, the cell 21 is determined to be The target primary cell or cell 31 is the target primary cell.

Step 2012, the base station sends a second radio resource control connection reconfiguration message to the user equipment.

The second radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target primary cell.

Step 2013, the user equipment switches from the current primary cell to the target primary cell according to the second radio resource control connection reconfiguration message.

Compared with the existing technology, the user equipment only performs co-frequency handover based on the content of the A3 event measurement report, resulting in the inability to restore the rate of the user equipment in a timely manner through carrier aggregation after the user equipment performs co-frequency handover, and to improve the single-user peak rate and LTE -A system capacity problem. In the cell selection method of the present invention, firstly, the A3 event measurement report and the A6 event measurement report are received, and the A3 event measurement report includes the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell. The signal quality of the cell, the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, and then judges the signal quality of the user equipment to each primary cell The difference between the signal quality and the signal quality from the user equipment to the current primary cell is greater than the A3 event threshold; according to the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, determine the target Primary cell: sending a first radio resource control connection reconfiguration message to the user equipment, instructing the user equipment to switch from the current primary cell to the target primary cell, so that the user can use the first radio resource control connection reconfiguration message After handover to the target handover cell, the primary cell and the secondary cell can be aggregated through the carrier aggregation technology in time, recovering the rate of the user equipment, and improving the peak rate of a single user and the capacity of the LTE-A system.

Example 3

An embodiment of the present invention provides a cell selection method, which is applied to a carrier aggregation network as shown in Figure 4. The carrier aggregation network includes an evolved base station 1, an evolved base station 2, an evolved base station 3, an evolved base station 4, and user equipment , and the micro base station 1 within the coverage area of the evolved base station 1, the micro base station 2 within the coverage area of the evolved base station 2, the micro base station 3 within the coverage area of the evolved base station 3, and the micro base station 4 within the coverage area micro base station4. Assuming that the user equipment is registered in the cell 11, and the cell 11 is the current primary cell, as shown in FIG. 5, the method includes:

Step 301, the base station sends a first radio resource control connection reconfiguration message to the user equipment.

The first radio resource control connection reconfiguration message includes an A3 event and an A6 event, and the A3 event is used to instruct the user equipment to measure the signal quality from the user equipment to cell 11, the signal quality from the user equipment to cell 21, The signal quality from the user equipment to the cell 31 and the signal quality from the user equipment to the cell 41 . The A6 event is used to instruct the user equipment to measure the signal quality from the user equipment to cell 12, the signal quality from the user equipment to cell 22, the signal quality from the user equipment to cell 32, and the signal quality from the user equipment to cell 42. Signal quality.

Step 302, the user equipment sends a first radio resource control connection reconfiguration complete message to the base station.

Assuming that the user equipment moves from the coverage areas of cell 11 and cell 12 to the overlapping area, step 303 to step 3010 are performed.

Step 303, the user equipment sends an A3 event measurement report to the base station.

The user equipment measures the signal quality from the user equipment to cell 21, the signal quality from the user equipment to cell 31, and the signal quality from the user equipment to cell 41 according to the indication of the A3 event, and then sends the A3 event measurement report to the base station, and the A3 The event measurement report includes the signal quality from the user equipment to cell 21 , the signal quality from the user equipment to cell 31 , and the signal quality from the user equipment to cell 41 .

Step 304, the user equipment sends an A6 event measurement report to the base station.

The user equipment measures the signal quality from the user equipment to cell 22, the signal quality from the user equipment to cell 32, and the signal quality from the user equipment to cell 42 according to the indication of the A6 event, and then sends an A6 event measurement report to the base station, and the A6 The event measurement report includes the signal quality from the user equipment to cell 22 , the signal quality from the user equipment to cell 32 , and the signal quality from the user equipment to cell 42 .

It should be noted that the user equipment may periodically measure the A3 event, and the user equipment may periodically measure the A6 event. The signal quality may be expressed as Reference Signal Received Power (English full name: Reference Signal Receiving Power, English abbreviation: RSRP).

Step 305, the base station acquires the first difference and the second difference.

The first difference may be the difference between the signal quality from the user equipment to cell 31 and the signal quality from the user equipment to cell 11, the difference between the signal quality from the user equipment to cell 21 and the signal quality from the user equipment to cell 11 and the difference between the signal quality from the user equipment to cell 41 and the signal quality from the user equipment to cell 11. The second difference may be the difference between the signal quality from the user equipment to the cell 32 and the signal quality from the user equipment to the cell 12, the difference between the signal quality from the user equipment to the cell 22 and the signal quality from the user equipment to the cell 12 and the difference between the signal quality of the user equipment to the cell 42 and the signal quality of the user equipment to the cell 12.

Step 306, the base station determines that each first difference is greater than the A3 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 21 and the signal quality from the user equipment to cell 11 is greater than the A3 event threshold α ₃ , and the signal quality from the user equipment to cell 21 meets the A3 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 31 and the signal quality from the user equipment to cell 11 is greater than the A3 event threshold α ₃ , and the signal quality from the user equipment to cell 31 meets the A3 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 41 and the signal quality from the user equipment to cell 11 is greater than the A3 event threshold α ₃ , and the signal quality from the user equipment to cell 41 meets the A3 event threshold.

The base station can preset the A3 event threshold. The A3 event threshold is set during the network optimization process so that the user equipment can obtain better switching performance, and the specific size is related to the network environment. The third generation partnership (full English name: 3rd Generation Partnership Project, English abbreviation: 3GPP) stipulates that it is between -15-15dB, and the A3 event threshold is usually configured to be greater than 0dB.

Step 307, the base station determines that each second difference is greater than the A6 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 22 and the signal quality from the user equipment to cell 12 is greater than the A6 event threshold α ₆ , and the signal quality from the user equipment to cell 22 meets the A6 event threshold.

The base station determines that the difference between the signal quality from the user equipment to cell 32 and the signal quality from the user equipment to cell 12 is greater than the A6 event threshold α ₆ , and the signal quality from the user equipment to cell 32 meets the A6 event threshold.

The base station judges that the difference between the signal quality from the user equipment to the cell 42 and the signal quality from the user equipment to the cell 12 is greater than the A6 event threshold α ₆ , and the signal quality from the user equipment to the cell 42 meets the A6 event threshold.

The base station can preset the A6 event threshold. The A6 event threshold can be set during the network optimization process so that the user equipment can obtain better handover performance, and the specific size is related to the network environment. The third generation partnership (full English name: 3rd Generation Partnership Project, English abbreviation: 3GPP) stipulates that it is between -15-15dB, and the A3 event threshold is usually configured to be greater than 0dB.

Step 308, the base station compares any two sum values to determine the target primary cell.

The sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell.

For example, the base station judges whether the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is greater than the sum of the signal quality of the cell 31 and the signal quality of the cell 32, if the sum of the signal quality of the cell 21 and the signal quality of the cell 22 is greater than the sum of the signal quality of the cell 21 and the cell 22 The sum of the signal quality of cell 31 and the signal quality of cell 32 is used to determine whether the sum of the signal quality of cell 21 and the signal quality of cell 22 is greater than the sum of the signal quality of cell 41 and cell 42. If the signal quality of cell 21 is equal to The sum of the signal qualities of the cell 22 is greater than the sum of the signal qualities of the cell 41 and the signal quality of the cell 42, and the cell 21 is determined to be the target primary cell.

It should be noted that, for the specific determination method between the two sum values, reference may be made to the descriptions in steps 208 to 2010 .

Step 309, the base station sends a second radio resource control connection reconfiguration message to the user equipment.

The second radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the target primary cell.

Step 3010, the user equipment switches from the current primary cell to the target primary cell according to the second radio resource control connection reconfiguration message.

It should be noted that the secondary cells within the coverage of the target primary cell need to have the same frequency point and the same number as the current secondary cell.

Example 4

An embodiment of the present invention provides a base station 30, as shown in FIG. 6 , including:

The receiving unit 301 is configured to receive the A3 event measurement report and the A6 event measurement report sent by the user equipment, the A3 event measurement report including the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell The A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, the user equipment is registered in the current primary cell, The current secondary cell is a secondary cell within the coverage of the current primary cell, the user equipment has been configured with the multiple current secondary cells, and the current primary cell and the multiple current secondary cells form a carrier aggregation cell pair , the secondary cell is a secondary cell within the coverage of the primary cell, and the primary cell and the secondary cell within the coverage of the primary cell form a carrier aggregation cell pair;

The processing unit 302 is configured to acquire each first difference, where the first difference is the difference between the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the current primary cell;

The processing unit 302 is further configured to determine that each of the first differences is greater than the A3 event threshold;

The processing unit 302 is further configured to determine the target primary cell according to each sum value, the sum value is the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, the The secondary cells within the coverage of the primary cell have the same frequency and the same number as the current secondary cell;

A sending unit 303, configured to send a first radio resource control connection reconfiguration message to the user equipment, where the first radio resource control connection reconfiguration message is used to instruct the user equipment to switch from the current primary cell to the Target main cell.

Compared with the existing technology, the user equipment only performs co-frequency handover based on the content of the A3 event measurement report, resulting in the inability to restore the rate of the user equipment in a timely manner through carrier aggregation after the user equipment performs co-frequency handover, and to improve the single-user peak rate and LTE -A system capacity problem. In the cell selection method of the present invention, firstly, the A3 event measurement report and the A6 event measurement report are received, and the A3 event measurement report includes the signal quality of the user equipment to at least two primary cells and the signal quality of the user equipment to the current primary cell. The signal quality of the cell, the A6 event measurement report includes the signal quality of the user equipment to multiple secondary cells and the signal quality of the user equipment to multiple current secondary cells, and then judges the signal quality of the user equipment to each primary cell The difference between the signal quality and the signal quality from the user equipment to the current primary cell is greater than the A3 event threshold; according to the sum of the signal quality from the user equipment to the primary cell and the signal quality from the user equipment to the secondary cell, determine the target Primary cell: sending a first radio resource control connection reconfiguration message to the user equipment, instructing the user equipment to switch from the current primary cell to the target primary cell, so that the user can use the first radio resource control connection reconfiguration message After handover to the target handover cell, the primary cell and the secondary cell can be aggregated through the carrier aggregation technology in time, recovering the rate of the user equipment, and improving the peak rate of a single user and the capacity of the LTE-A system.

The processing unit 302 is specifically used for:

Comparing any two sum values to determine the target primary cell, the sum of the signal quality from the user equipment to the target primary cell and the signal quality from the user equipment to secondary cells within the coverage of the target primary cell is all sum The largest sum of the values.

The processing unit 302 is specifically used for:

judging whether the first sum value is greater than a second sum value, the first sum value being the signal quality from the user equipment to the first primary cell and the signal quality from the user equipment to the secondary cell within the coverage of the first primary cell The sum of signal qualities, the second sum value is the sum of the signal quality from the user equipment to the second primary cell and the signal quality from the user equipment to secondary cells within the coverage of the second primary cell;

When the first sum is greater than the second sum, determining that the first primary cell is the target primary cell;

When the first sum value is less than the second sum value, determine that the second primary cell is the target primary cell;

When the first sum value is equal to the second sum value, the target primary cell is determined according to the signal quality from the user equipment to the first primary cell and the signal quality from the user equipment to the second primary cell.

The processing unit 302 is also used for:

Acquiring each second difference, where the second difference is the difference between the signal quality from the user equipment to the secondary cell and the signal quality from the user equipment to the current secondary cell;

Judging that each of the second differences is greater than the A6 event threshold.

The sending unit 303 is also configured to:

sending a second radio resource control connection reconfiguration message to the user equipment, where the second radio resource control connection reconfiguration message includes an A3 event and an A6 event, and the A3 event is used to instruct the user equipment to measure the user equipment The signal quality to the primary cell, the A6 event is used to instruct the user equipment to measure the signal quality from the user equipment to the secondary cell.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described devices and units can refer to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. a kind of cell selecting method, which is characterized in that it is applied to base station, including：

The A3 event measurement reports and A6 event measurement reports, the A3 event measurement reports for receiving user equipment transmission include institute State user equipment at least two main plots signal quality and the user equipment to current main plot signal quality, it is described A6 event measurement reports include the user equipment to the signal quality of multiple secondary cells and the user equipment to multiple current The signal quality of secondary cell, for the user equipment registration in the current main plot, the current secondary cell is the current master Secondary cell in cell coverage area, the configured the multiple current secondary cell of user equipment, the current main plot with The multiple current secondary cell component carrier aggregation cell pair, the secondary cell are auxiliary small in the main plot coverage area Area, the main plot and the secondary cell component carrier aggregation cell pair in the main plot coverage area；

Each first difference is obtained, first difference is that the signal quality of the user equipment to main plot is set with the user The difference of the standby signal quality to current main plot；

Judge that each first difference is more than the A3 event thresholds value；

According to each and value, target main plot is determined, described and signal quality that value is the user equipment to main plot and institute User equipment is stated to the sum of the signal quality of secondary cell, the secondary cell in the main plot coverage area and the current secondary cell Frequency point it is identical and number is identical；

The basis is each and is worth, and determines that target main plot includes：

Any two and value are compared, determine target main plot, signal quality of the user equipment to target main plot In being all and value with the user equipment to the sum of the signal quality of secondary cell in the coverage area of the target main plot most Big and value；

The first wireless resource control connection reconfiguration message, the first wireless heterogeneous networks connection are sent to the user equipment Reconfiguration message is used to indicate the user equipment and is switched to the target main plot from the current main plot.

2. according to the method described in claim 1, it is characterized in that, it is described to any two and value be compared including：

Judge whether first be more than second and value with value, described first and value are signal of the user equipment to the first main plot Quality and the user equipment to the sum of the signal quality of secondary cell in the coverage area of first main plot, second and value be In the user equipment to the signal quality and the user equipment to second main plot coverage area of the second main plot The sum of signal quality of secondary cell；

When first and value more than second and value, determine first main plot be target main plot；

When first and value less than second and value, determine second main plot be target main plot；

When first and value equal to second and value, according to the signal quality of the user equipment to the first main plot and the use Family equipment determines target main plot to the signal quality of the second main plot.

3. according to the method described in claim 2, it is characterized in that, judging each first difference more than the A3 events After threshold value, the method further includes：

Each second difference is obtained, second difference is that the signal quality of the user equipment to secondary cell is set with the user The difference of the standby signal quality to current secondary cell；

Judge that each second difference is more than the A6 event thresholds value.

4. according to the method described in claim 1-3 any one claims, which is characterized in that in the reception user equipment Before the A3 event measurement reports and A6 event measurement reports of transmission, the method further includes：

The second wireless resource control connection reconfiguration message, the second wireless heterogeneous networks connection are sent to the user equipment Reconfiguration message includes A3 events and A6 events, and the A3 events are used to indicate the user equipment measurement user equipment and arrive The signal quality of main plot, A6 events be used to indicate the user equipment measure the user equipment to secondary cell signal matter Amount.

5. a kind of base station, which is characterized in that including：

Receiving unit, A3 event measurement reports and A6 event measurement reports for receiving user equipment transmission, the A3 events Measurement report includes the user equipment to the signal quality of at least two main plots and the user equipment to current main plot Signal quality, the A6 event measurement reports include signal quality and the user of the user equipment to multiple secondary cells For equipment to the signal quality of multiple current secondary cells, the user equipment registration is described current auxiliary small in the current main plot Area is the secondary cell in the current main plot coverage area, the configured the multiple current secondary cell of user equipment, institute Current main plot and the multiple current secondary cell component carrier aggregation cell pair are stated, the secondary cell covers for the main plot Secondary cell in range, the main plot and the secondary cell component carrier aggregation cell pair in the main plot coverage area；

Processing unit, for obtaining each first difference, first difference is signal matter of the user equipment to main plot Amount and the user equipment to the signal quality of current main plot difference；

The processing unit is additionally operable to judge that each first difference is more than the A3 event thresholds value；

The processing unit is additionally operable to, according to each and value, determine that target main plot, described and value are the user equipment to master The signal quality of cell and the user equipment to secondary cell the sum of signal quality, it is auxiliary small in the main plot coverage area Area is identical as the frequency point of current secondary cell and number is identical；

The processing unit is specifically used for：

Any two and value are compared, determine target main plot, signal quality of the user equipment to target main plot In being all and value with the user equipment to the sum of the signal quality of secondary cell in the coverage area of the target main plot most Big and value；

Transmission unit, for sending the first wireless resource control connection reconfiguration message, first nothing to the user equipment Line resources control connection reconfiguration sets message and is used to indicate the user equipment is switched to the target master from the current main plot Cell.

6. base station according to claim 5, which is characterized in that the processing unit is specifically used for：

Judge whether first be more than second and value with value, described first and value are signal of the user equipment to the first main plot Quality and the user equipment to the sum of the signal quality of secondary cell in the coverage area of first main plot, second and value be In the user equipment to the signal quality and the user equipment to second main plot coverage area of the second main plot The sum of signal quality of secondary cell；

When first and value more than second and value, determine first main plot be target main plot；

When first and value less than second and value, determine second main plot be target main plot；

When first and value equal to second and value, according to the signal quality of the user equipment to the first main plot and the use Family equipment determines target main plot to the signal quality of the second main plot.

7. base station according to claim 6, which is characterized in that the processing unit is additionally operable to：

Each second difference is obtained, second difference is that the signal quality of the user equipment to secondary cell is set with the user The difference of the standby signal quality to current secondary cell；

Judge that each second difference is more than the A6 event thresholds value.

8. according to the base station described in claim 5-7 any one claims, which is characterized in that the transmission unit is also used In：

The second wireless resource control connection reconfiguration message, the second wireless heterogeneous networks connection are sent to the user equipment Reconfiguration message includes A3 events and A6 events, and the A3 events are used to indicate the user equipment measurement user equipment and arrive The signal quality of main plot, A6 events be used to indicate the user equipment measure the user equipment to secondary cell signal matter Amount.