CN104994548B - A kind of switching method in LTE system and base station - Google Patents

Abstract

The embodiment of the present invention discloses a handover method and a base station in an LTE system, which relate to the field of communication technology and can ensure that the data rate of the downlink after UE handover is greater than the data rate of the downlink before UE handover, thereby improving user experience . The specific solution is: the base station of the serving cell obtains the first SINR; the base station obtains the second SINR; the base station obtains the number of available RBs in the serving cell and the number of available RBs in the first cell; The number of available RBs in the cell determines the downlink data rate of the UE in the serving cell, and determines the downlink data rate of the UE in the first cell according to the second SINR and the number of available RBs in the first cell ; If the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the base station switches the UE from the serving cell to the first cell.

Description

Handover method and base station in an LTE system

technical field

The present invention relates to the field of communication technologies, and in particular to a handover method and a base station in a Long Term Evolution (English: Long Term Evolution, abbreviation: LTE) system.

Background technique

Due to the limited coverage of each cell in the LTE system, when the user equipment (English: User Equipment, abbreviation: UE) moves to the edge of the serving cell, the signal quality of the UE in the serving cell may gradually decrease. communication, the UE needs to be handed over from the serving cell to the neighboring cell with better signal quality.

In the LTE system, users have an increasing demand for data services (such as browsing web pages, downloading songs, downloading videos, etc.), and the service quality of data services is mainly affected by the quality of the downlink, while the quality of the uplink has a great impact on The service quality of the data service has little influence, therefore, the existing handover method mainly focuses on the quality of the downlink. A handover method commonly used in an LTE system is a handover method based on Reference Signal Received Power (English: Reference Signal Receiving Power, abbreviation: RSRP). The method includes: the UE separately measures the RSRP of the serving cell and the RSRP of the adjacent cell, and reports the measurement results to the base station of the serving cell; the base station of the serving cell makes a judgment according to the RSRP of the serving cell and the RSRP of the adjacent cell, and determines whether to perform handover. Specifically, when the RSRP of the neighboring cell is greater than the RSRP of the serving cell, the base station of the serving cell handovers the UE from the serving cell to the neighboring cell; when the RSRP of the neighboring cell is less than or equal to the RSRP of the serving cell, the UE does not perform handover.

However, the above method has the following problems: RSRP can only reflect the signal strength of the downlink, and for data services, users pay more attention to the data rate of the downlink. It is also related to the strength of the interference signal and the amount of available system resources. In a cell with a large RSRP, the downlink data rate is not necessarily high. Therefore, the size of the RSRP cannot reflect the size of the downlink data rate. According to RSRP Determining whether to perform handover may cause the downlink data rate of the UE after the handover to be lower than the downlink data rate of the UE before the handover, thereby causing poor user experience.

Contents of the invention

Embodiments of the present invention provide a handover method and a base station in an LTE system, which can ensure that the downlink data rate of the UE after handover is greater than the downlink data rate of the UE before handover, thereby improving user experience.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

The first aspect of the embodiments of the present invention provides a handover method in a long term evolution LTE system, including:

The base station of the serving cell acquires a first SINR, where the first SINR is the SINR of the serving cell measured by the user equipment UE;

The base station acquires a second SINR, where the second SINR is the SINR of the first cell measured by the UE, and the first cell is a neighboring cell;

The base station acquires the number of available resource block RBs of the serving cell and the number of available RBs of the first cell;

The base station determines the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell, and determines the downlink data rate of the UE in the serving cell according to the second SINR and the first The number of available RBs of the cell determines the downlink data rate of the UE in the first cell;

If the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the base station switches the UE from the serving cell to the Describe the first district.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the base station of the serving cell acquires the first SINR, including:

The base station sends a first measurement message to the UE, where the first measurement message is used to instruct the UE to measure the SINR of the serving cell;

The base station receives the first measurement result sent by the UE, where the first measurement result includes the first SINR, and the first SINR is the SINR of the serving cell measured by the UE.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, acquiring the second SINR by the base station includes:

If the first SINR is less than or equal to the measurement threshold, the base station sends a second measurement message to the UE, the second measurement message is used to instruct the UE to measure the SINR of the second cell, and the second measurement message Including the identity and handover threshold of the second cell, the second cell is a neighbor cell to be measured;

The base station receives the second measurement result reported by the UE, the second measurement result includes: the identity of the first cell and the second SINR, and the first cell is the measured result obtained by the UE. Among the second cells, the cells whose SINR is greater than the handover threshold, the second SINR is the SINR of the first cell measured by the UE.

With reference to the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the base station according to the first A SINR and the number of available RBs of the serving cell determine the downlink data rate of the UE in the serving cell, and according to the second SINR and the number of available RBs of the first cell Determining a downlink data rate of the UE in the first cell includes:

The base station searches a first mapping table according to the first SINR and the number of available RBs of the serving cell to obtain a first data rate, and the first data rate is the UE's RB in the serving cell Downlink data rate;

The base station searches the first mapping table according to the second SINR and the number of available RBs of the first cell, and obtains a second data rate, and the second data rate is the UE in the second the data rate of the downlink in a cell;

Wherein, the first mapping table is a pre-stored mapping table in the base station, and the first mapping table is used to indicate a correspondence between SINR, the number of available RBs, and a data rate.

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

If the downlink data rate of the UE in the first cell is less than or equal to the downlink data rate of the UE in the serving cell, the base station lowers the measurement threshold by a preset value, and The reduced measurement threshold is used as a new measurement threshold.

A second aspect of the embodiments of the present invention provides a base station, including:

An acquiring unit, configured to acquire a first signal-to-interference-noise ratio SINR, where the first SINR is the SINR of the serving cell measured by the user equipment UE;

The acquiring unit is further configured to acquire a second SINR, where the second SINR is the SINR of the first cell measured by the UE, and the first cell is a neighboring cell;

The acquiring unit is further configured to acquire the number of available resource block RBs of the serving cell and the number of available RBs of the first cell;

a determining unit, configured to determine the downlink data rate of the UE in the serving cell according to the first SINR obtained by the obtaining unit and the number of available RBs in the serving cell, and according to the The second SINR obtained by the obtaining unit and the number of available RBs in the first cell determine the downlink data rate of the UE in the first cell;

A switching unit, configured to if the downlink data rate of the UE in the first cell determined by the determining unit is greater than the downlink data rate of the UE in the serving cell determined by the determining unit , then handover the UE from the serving cell to the first cell.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the acquiring unit includes:

A sending module, configured to send a first measurement message to the UE, where the first measurement message is used to instruct the UE to measure the SINR of the serving cell;

A receiving module, configured to receive a first measurement result sent by the UE, where the first measurement result includes the first SINR, and the first SINR is the SINR of the serving cell measured by the UE.

With reference to the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the sending module is further configured to, if the first SINR is less than or equal to a measurement threshold, send the The UE sends a second measurement message, the second measurement message is used to instruct the UE to measure the SINR of the second cell, the second measurement message includes the identity of the second cell and a handover threshold, and the second cell is the neighboring cell to be measured;

The receiving module is further configured to receive a second measurement result reported by the UE, the second measurement result includes: the identity of the first cell and the second SINR, the first cell is the A cell whose SINR is greater than the handover threshold among the second cells measured by the UE, where the second SINR is the SINR of the first cell obtained by the UE.

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

A search module, configured to search a first mapping table according to the first SINR obtained by the obtaining unit and the number of available RBs of the serving cell, to obtain a first data rate, where the first data rate is the The downlink data rate of the UE in the serving cell;

The search module is further configured to search the first mapping table according to the second SINR obtained by the obtaining unit and the number of available RBs of the first cell to obtain a second data rate, and the second The second data rate is the downlink data rate of the UE in the first cell;

Wherein, the first mapping table is a pre-stored mapping table in the base station, and the first mapping table is used to indicate a correspondence between SINR, the number of available RBs, and a data rate.

With reference to the second possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the base station further includes:

An updating unit, configured to if the downlink data rate of the UE in the first cell determined by the determining unit is less than or equal to the downlink data of the UE in the serving cell determined by the determining unit rate, the measurement threshold is reduced by a preset value, and the reduced measurement threshold is used as a new measurement threshold.

In the handover method and base station in the LTE system provided by the embodiments of the present invention, the base station of the serving cell obtains the first SINR; the base station obtains the second SINR; the base station obtains the number of available RBs of the serving cell and the number of available RBs of the first cell number; the base station determines the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell, and determines the UE's downlink data rate in the serving cell according to the second SINR and the number of available RBs in the first cell The downlink data rate in the first cell; if the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the base station will switch the UE from the serving cell to the first district.

Compared with the RSRP-based handover method in the prior art, which may cause the downlink data rate of the UE after handover to be lower than the downlink data rate of the UE before handover, resulting in poor user experience, the present implementation provides In the handover method, only when the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the UE is handed over from the serving cell to the first cell, which can ensure the downlink speed of the UE after handover. The data rate of the link is greater than the data rate of the downlink before the handover of the UE, thereby improving user experience.

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. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flowchart of a handover method in an LTE system provided by an embodiment of the present invention;

FIG. 2 is a flowchart of another handover method in an LTE system provided by an embodiment of the present invention;

FIG. 3 is a schematic composition diagram of a base station provided by an embodiment of the present invention;

FIG. 4 is a schematic composition diagram of another base station provided by an embodiment of the present invention;

FIG. 5 is a schematic composition diagram of another base station provided by an embodiment of the present invention;

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

FIG. 7 is a schematic composition diagram of another base station provided by an embodiment of the present invention;

FIG. 8 is a schematic composition diagram of another 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 of the embodiments of the present invention, not all of them. 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 handover method in an LTE system, as shown in FIG. 1 , including:

S101. The base station of the serving cell acquires a first Signal to Interference plus Noise Ratio (English: Signal to Interference plus Noise Ratio, abbreviation: SINR).

Wherein, the serving cell is the cell currently accessed by the UE, and the first SINR is the SINR of the serving cell measured and obtained by the UE.

Specifically, the base station may acquire the first SINR by sending a measurement message to the UE to instruct the UE to measure and report the first SINR. The base station may also obtain the first SINR through the first SINR actively reported by the UE. The embodiment of the present invention does not specifically limit the method for the base station to obtain the first SINR here.

S102. The base station acquires a second SINR.

Wherein, the second SINR is the SINR of the first cell measured and obtained by the UE, and the first cell is a neighboring cell. Specifically, the base station may acquire the second SINR by sending a measurement message to the UE to instruct the UE to measure and report the second SINR. The base station may also obtain the second SINR through the second SINR actively reported by the UE. The embodiment of the present invention does not specifically limit the method for the base station to obtain the second SINR here.

S103. The base station obtains the number of available resource blocks (English: Resource Block, abbreviation: RB) of the serving cell and the number of available RBs of the first cell.

In the LTE system, in the frequency domain, one RB is composed of 12 subcarriers with a bandwidth of 15 kHz, and in the time domain, one RB is one time slot (0.5 ms).

In this step, the base station may exchange information with the base station of the first cell through the X2 interface, so as to acquire the number of available RBs of the first cell.

S104. The base station determines the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell, and determines the UE's downlink data rate in the serving cell according to the second SINR and the number of available RBs in the first cell. The downlink data rate in a cell.

Wherein, the base station can calculate the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell in combination with Shannon's formula, or according to the SINR, the number of RBs, and the data rate The mapping table calculates the downlink data rate of the UE in the serving cell, where different equipment manufacturers may specify different mapping tables between the SINR, the number of RBs, and the data rate.

The method for the base station to determine the downlink data rate of the UE in the first cell according to the second SINR and the number of available RBs in the first cell is the same as the method for the base station to determine according to the first SINR and the number of available RBs in the serving cell The downlink data rate of the UE in the serving cell is the same, which will not be repeated here in this embodiment.

S105. If the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the base station switches the UE from the serving cell to the first cell.

In the handover method in the LTE system provided by this embodiment, the base station of the serving cell obtains the first SINR; the base station obtains the second SINR; the base station obtains the number of available RBs of the serving cell and the number of available RBs of the first cell; The base station determines the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell, and determines the downlink data rate of the UE in the first cell according to the second SINR and the number of available RBs in the first cell. If the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the base station switches the UE from the serving cell to the first cell.

Compared with the RSRP-based handover method in the prior art, which may cause the downlink data rate of the UE after handover to be lower than the downlink data rate of the UE before handover, resulting in poor user experience, the present implementation provides In the handover method, only when the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the UE is handed over from the serving cell to the first cell, which can ensure the downlink speed of the UE after handover. The data rate of the link is greater than the data rate of the downlink before the handover of the UE, thereby improving user experience.

Example 2

An embodiment of the present invention provides a handover method in an LTE system, as shown in FIG. 2 , including:

S201. The base station sends a first measurement message to the UE, where the first measurement message is used to instruct the UE to measure the SINR of the serving cell.

Wherein, the base station is a base station of a serving cell, and the serving cell is a cell currently accessed by the UE.

S202. The base station receives the first measurement result sent by the UE, where the first measurement result includes a first SINR, and the first SINR is the SINR of the serving cell measured by the UE.

S203. If the first SINR is less than or equal to the measurement threshold, the base station sends a second measurement message to the UE.

Wherein, the measurement threshold is a preset value, which can be represented by α. The second measurement message is used to instruct the UE to measure the SINR of the second cell, the second measurement message includes the identity of the second cell and the handover threshold, and the second cell is a neighboring cell to be measured. The neighboring cells to be measured may include multiple cells.

Further, the base station can perform information interaction with the base station of the second cell through the X2 interface, so as to obtain the configuration information of the downlink reference signal of the second cell (such as the time-frequency information of the RB occupied by the downlink reference signal, the transmission cycle of the downlink reference signal) Wait). The second measurement message sent by the base station to the UE may further include configuration information of the downlink reference signal of the second cell. The UE performs demodulation on the RB occupied by the downlink reference signal according to the configuration information of the downlink reference signal of the second cell, and can obtain the strength of the downlink reference signal of the second cell and the strength of the interference signal, thereby obtaining the strength of the downlink reference signal of the second cell. SINR.

S204. The base station receives the second measurement result reported by the UE.

Wherein, the second measurement result includes: the identity of the first cell and the second SINR, the first cell is the cell whose SINR is greater than the handover threshold in the second cell measured by the UE, and the second SINR is the cell of the first cell measured by the UE SINR, the switching threshold is a preset value, which can be represented by β.

It should be noted that the second cell may include multiple cells, the first cell belongs to the second cell, the first cell may include one cell, and the first cell may also include multiple cells.

S205. The base station acquires the number of available RBs of the serving cell and the number of available RBs of the first cell.

In this step, the base station may exchange information with the base station of the first cell through the X2 interface, so as to acquire the number of available RBs of the first cell.

S206. The base station searches the first mapping table according to the first SINR and the number of available RBs of the serving cell to obtain a first data rate, where the first data rate is a downlink data rate of the UE in the serving cell.

Wherein, the first mapping table is a pre-stored mapping table in the base station, and the first mapping table is used to indicate the correspondence between the SINR, the number of available RBs, and the data rate. Different equipment manufacturers may specify different SINRs, mapping tables between the number of RBs and data rates.

S207. The base station searches the first mapping table according to the second SINR and the number of available RBs in the first cell to obtain a second data rate, where the second data rate is a downlink data rate of the UE in the first cell.

S208. The base station judges whether the second data rate is greater than the first data rate.

If the second data rate is greater than the first data rate, execute S209; if the second data rate is less than or equal to the first data rate, execute S210.

S209. The base station switches the UE from the serving cell to the first cell.

It should be noted that, if there are multiple cells in the first cell and the second data rate is greater than the first data rate, the base station may handover the UE from the serving cell to any one of the multiple cells.

S210. The base station reduces the measurement threshold by a preset value, and uses the reduced measurement threshold as a new measurement threshold.

Wherein, the preset value can be expressed as Δ, and the new measurement threshold can be expressed as α', where α'=α-Δ.

After S210, S201-S208 may be repeatedly executed.

In the handover method in the LTE system provided by this embodiment, only when the first SINR is less than or equal to the measurement threshold, the base station sends the second measurement message to the UE to instruct the UE to measure the SINR of the second cell, which can reduce the number of measurements of the UE , thereby saving system resources. Moreover, in the handover method provided by this implementation, only when the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the UE is handed over from the serving cell to the first cell, It can ensure that the data rate of the downlink after the handover of the UE is greater than the data rate of the downlink before the handover of the UE, thereby improving user experience. In addition, if the second data rate is less than or equal to the first data rate, the UE will not be handed over. At this time, if the UE continues to measure the SINR of the second cell, the final result may still be that the second data rate is less than or equal to the first data rate. In this way, frequently measuring the SINR of the second cell will consume a lot of power of the UE. Using the handover method of this embodiment, if the second data rate is less than or equal to the first data rate, the base station will reduce the measurement threshold by a preset value, and use the reduced measurement threshold as a new measurement threshold. In this way, only when the serving cell When the SINR drops by a certain value and the SINR of the serving cell is less than or equal to the new measurement threshold, the UE continues to measure the SINR of the second cell, which can reduce the power consumption of the UE.

Example 3

An embodiment of the present invention provides a base station, as shown in FIG. 3 , which may include: an acquiring unit 31 , a determining unit 32 , and a switching unit 33 .

The obtaining unit 31 is configured to obtain a first SINR, where the first SINR is the SINR of the serving cell measured by the UE.

The obtaining unit 31 is further configured to obtain a second SINR, where the second SINR is the SINR of the first cell measured and obtained by the UE, and the first cell is a neighboring cell.

The obtaining unit 31 is further configured to obtain the number of available RBs of the serving cell and the number of available RBs of the first cell.

The determining unit 32 is configured to determine the downlink data rate of the UE in the serving cell according to the first SINR obtained by the obtaining unit 31 and the number of available RBs in the serving cell, and according to the second SINR and the second SINR obtained by the obtaining unit 31 The number of available RBs in a cell determines the downlink data rate of the UE in the first cell.

The switching unit 33 is configured to switch the UE from the serving cell to first cell.

Further, as shown in FIG. 4 , the acquiring unit 31 includes: a sending module 311 and a receiving module 312 .

The sending module 311 is configured to send a first measurement message to the UE, where the first measurement message is used to instruct the UE to measure the SINR of the serving cell.

The receiving module 312 is configured to receive the first measurement result sent by the UE, the first measurement result includes a first SINR, and the first SINR is the SINR of the serving cell measured by the UE.

Further, the sending module 311 is also configured to send a second measurement message to the UE if the first SINR is less than or equal to the measurement threshold, the second measurement message is used to instruct the UE to measure the SINR of the second cell, and the second measurement message includes the first The identification and handover threshold of the second cell, the second cell is the neighbor cell to be measured.

The receiving module 312 is also configured to receive the second measurement result reported by the UE, the second measurement result includes: the identity of the first cell and the second SINR, the first cell is the SINR of the second cell measured by the UE is greater than the handover threshold cell, and the second SINR is the SINR of the first cell measured and obtained by the UE.

Further, as shown in FIG. 5 , the determining unit 32 includes: a search module 321 .

The search module 321 is configured to search the first mapping table according to the first SINR obtained by the obtaining unit 31 and the number of available RBs in the serving cell to obtain the first data rate, where the first data rate is the downlink rate of the UE in the serving cell road data rate.

The search module 321 is further configured to search the first mapping table according to the second SINR obtained by the obtaining unit 31 and the number of available RBs in the first cell to obtain the second data rate, the second data rate is the UE in the first cell The downlink data rate.

Wherein, the first mapping table is a pre-stored mapping table in the base station, and the first mapping table is used to indicate the correspondence between the SINR, the number of available RBs, and the data rate.

Further, as shown in FIG. 6 , the base station in this embodiment of the present invention further includes: an updating unit 34 .

An updating unit 34, configured to reduce the measurement threshold by a preset value if the downlink data rate of the UE in the first cell determined by the determining unit 32 is less than or equal to the downlink data rate of the UE in the serving cell determined by the determining unit 32 value, and use the reduced measurement threshold as the new measurement threshold.

It should be noted that, for the specific description of some functional modules in the base station provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, and details will not be described in detail here in this embodiment.

In the base station provided by the embodiment of the present invention, the acquiring unit 31 acquires the first SINR, acquires the second SINR, acquires the number of available RBs in the serving cell and the number of available RBs in the first cell; The number of available RBs in the cell determines the downlink data rate of the UE in the serving cell, and determines the downlink data rate of the UE in the first cell according to the second SINR and the number of available RBs in the first cell ; If the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, the switching unit 33 switches the UE from the serving cell to the first cell.

Compared with the RSRP-based handover method in the prior art, which may cause the downlink data rate of the UE after handover to be lower than the downlink data rate of the UE before handover, resulting in poor user experience, the present embodiment provides Only when the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, will the UE be handed over from the serving cell to the first cell, which can ensure the downlink speed of the UE after handover The data rate of the downlink is greater than the data rate of the downlink before the handover of the UE, thereby improving user experience.

Example 4

An embodiment of the present invention provides a base station, as shown in FIG. 7 , may include: a processor 41 .

The processor 41 is configured to obtain a first SINR, where the first SINR is the SINR of the serving cell measured by the UE; obtain a second SINR, where the second SINR is the SINR of the first cell obtained by the UE measurement, and the first cell is a neighboring cell; Acquiring the number of available RBs in the serving cell and the number of available RBs in the first cell; determining the downlink data rate of the UE in the serving cell according to the first SINR and the number of available RBs in the serving cell, and according to the first SINR and the number of available RBs in the serving cell, and Two SINR and the number of available RBs in the first cell determine the downlink data rate of the UE in the first cell; if the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell data rate, the UE is handed over from the serving cell to the first cell.

Wherein, the processor 41 may be the control center of the base station, such as a central processing unit (English: Central Processing Unit, abbreviated: CPU), and may also be a CPU, an image processor (English: Graphic Processing Unit, abbreviated: GPU), a digital signal processor (English: Digital Signal Processor, abbreviation: DSP) and a combination of a control chip (such as a baseband chip) in the communication unit. In the embodiments of the present invention, the CPU may be a single computing core, or may include multiple computing cores.

Further, as shown in FIG. 8 , the base station in this embodiment further includes: a transmitter 42 , a receiver 43 and a memory 44 . The processor 41 , the transmitter 42 , the receiver 43 and the memory 44 are connected through a bus to complete mutual communication.

Wherein, the bus may be an Industry Standard Architecture (English: Industry Standard Architecture, abbreviation: ISA) bus, a Peripheral Component Interconnect (English: Peripheral Component Interconnect, abbreviation: PCI) bus or an Extended Industry Standard Architecture (English: Extended Industry Standard Architecture, abbreviation: EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 8 , but it does not mean that there is only one bus or one type of bus.

The transmitter 42 is configured to send a first measurement message to the UE, where the first measurement message is used to instruct the UE to measure the SINR of the serving cell.

The receiver 43 is configured to receive the first measurement result sent by the UE, where the first measurement result includes a first SINR, and the first SINR is the SINR of the serving cell measured by the UE.

The memory 44 is configured to store the first SINR, the second SINR, the number of available RBs in the serving cell, the number of available RBs in the first cell, the downlink data rate of the UE in the serving cell, and the number of UEs in the first SINR. The data rate of the downlink in the cell, etc.

Further, the transmitter 42 is also configured to send a second measurement message to the UE if the first SINR is less than or equal to the measurement threshold, the second measurement message is used to instruct the UE to measure the SINR of the second cell, and the second measurement message includes the first The identification and handover threshold of the second cell, the second cell is the neighbor cell to be measured.

The receiver 43 is also configured to receive the second measurement result reported by the UE, the second measurement result includes: the identity of the first cell and the second SINR, the first cell is the SINR of the second cell measured by the UE is greater than the handover threshold cell, and the second SINR is the SINR of the first cell measured and obtained by the UE.

Further, the processor 41 is further configured to search the first mapping table according to the first SINR and the number of available RBs of the serving cell to obtain the first data rate, where the first data rate is the downlink rate of the UE in the serving cell According to the second SINR and the number of available RBs in the first cell, search the first mapping table to obtain the second data rate, the second data rate is the downlink data rate of the UE in the first cell.

Wherein, the first mapping table is a pre-stored mapping table in the base station, and the first mapping table is used to indicate the correspondence between the SINR, the number of available RBs, and the data rate.

Further, the processor 41 is also configured to reduce the measurement threshold by a preset value if the downlink data rate of the UE in the first cell is less than or equal to the downlink data rate of the UE in the serving cell, and set the reduced The measurement threshold of is used as the new measurement threshold.

It should be noted that, for the specific description of some functional modules in the base station provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, and details will not be described in detail here in this embodiment.

In the base station provided by the embodiment of the present invention, the processor 41 obtains the first SINR, obtains the second SINR, obtains the number of available RBs of the serving cell and the number of available RBs of the first cell; according to the first SINR and the number of available RBs of the serving cell The number of RBs determines the downlink data rate of the UE in the serving cell, and determines the downlink data rate of the UE in the first cell according to the second SINR and the number of available RBs in the first cell; if the UE If the downlink data rate of the first cell is greater than the downlink data rate of the UE in the serving cell, then the UE is handed over from the serving cell to the first cell.

Compared with the RSRP-based handover method in the prior art, which may cause the downlink data rate of the UE after handover to be lower than the downlink data rate of the UE before handover, resulting in poor user experience, the present embodiment provides Only when the downlink data rate of the UE in the first cell is greater than the downlink data rate of the UE in the serving cell, will the UE be handed over from the serving cell to the first cell, which can ensure the downlink speed of the UE after handover The data rate of the downlink is greater than the data rate of the downlink before the handover of the UE, thereby improving user experience.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made 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 system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, 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 shown 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 exist separately physically, 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 software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random AccessMemory, abbreviated: RAM), magnetic disk or optical disc, etc. A medium on which program code can be stored.

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 (10)

1. the switching method in a kind of long term evolution LTE system, which is characterized in that including：

The first Signal to Interference plus Noise Ratio of base station the acquisition SINR, the first SINR of serving cell obtain described for user equipment (UE) measurement The SINR of serving cell；

The base station obtains the 2nd SINR, and the 2nd SINR is the SINR for the first community that the UE measurements obtain, and described the One cell is adjacent cell；

The base station obtains the number of the number of the available resource block RB of the serving cell and the available RB of the first community；

The base station determines the UE in the service according to the number of the first SINR and the available RB of the serving cell The data rate of downlink in cell, and determined according to the number of the 2nd SINR and the available RB of the first community The data rate of downlinks of the UE in the first community；

If the UE the downlink of the first community data rate be more than the UE the serving cell downlink The data rate of link, then the base station UE is switched into the first community from the serving cell.

2. switching method according to claim 1, which is characterized in that the base station of the serving cell obtains first and believes dry make an uproar Than SINR, including：

The base station sends first to the UE and measures message, and the first measurement message is used to indicate the UE and measures the clothes The SINR for cell of being engaged in；

The base station receives the first measurement result that the UE is sent, and includes the first SINR in first measurement result, First SINR is the SINR for the serving cell that the UE measurements obtain.

3. switching method according to claim 2, which is characterized in that the base station obtains the 2nd SINR, including：

If the first SINR is less than or equal to measure thresholding, the base station sends second to the UE and measures message, described the Two measurement message are used to indicate the SINR that the UE measures second community, and described second measures in message comprising the second community Mark and handoff threshold, the second community be adjacent cell to be measured；

The base station receives the second measurement result that the UE is reported, and includes in second measurement result：The first community Mark and the 2nd SINR, the first community be in the obtained second community of the UE measurements SINR be more than it is described The cell of handoff threshold, the 2nd SINR are the SINR for the first community that the UE measurements obtain.

4. switching method according to any one of claim 1-3, which is characterized in that the base station is according to described first The number of the available RB of SINR and the serving cell determines the data speed of downlinks of the UE in the serving cell Rate, and determine the UE in the first community according to the number of the 2nd SINR and the available RB of the first community The data rate of downlink, including：

The first mapping table is searched, is obtained according to the number of the first SINR and the available RB of the serving cell in the base station First data rate, first data rate are the data rate of downlinks of the UE in the serving cell；

First mapping table is searched in the base station according to the number of the 2nd SINR and the available RB of the first community, The second data rate is obtained, second data rate is the data speed of downlinks of the UE in the first community Rate；

Wherein, first mapping table is the mapping table pre-saved in the base station, and first mapping table is used to indicate SINR, the correspondence between the number and data rate of RB can be used.

5. switching method according to claim 3, which is characterized in that the switching method further includes：

If the UE is less than or equal to the UE in the serving cell in the data rate of the downlink of the first community The data rate of downlink, then the measurement thresholding is reduced preset value by the base station, and the measurement thresholding after reduction is made For new measurement thresholding.

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

Acquiring unit is the service that user equipment (UE) measurement obtains for obtaining the first Signal to Interference plus Noise Ratio SINR, the first SINR The SINR of cell；

The acquiring unit is additionally operable to obtain the 2nd SINR, and the 2nd SINR is the first community that the UE measurements obtain SINR, the first community are adjacent cell；

The acquiring unit, be additionally operable to obtain the number of the available resource block RB of the serving cell and the first community can With the number of RB；

Determination unit, of the available RB of the first SINR and the serving cell for being obtained according to the acquiring unit Number determines the data rate of downlinks of the UE in the serving cell, and according to described in acquiring unit acquisition The number of 2nd SINR and the available RB of the first community determine the number of downlinks of the UE in the first community According to rate；

Switch unit, if for the determination unit determine the UE the first community downlink data rate The UE determined more than the determination unit the downlink of the serving cell data rate, then by the UE from institute It states serving cell and switches to the first community.

7. base station according to claim 6, which is characterized in that the acquiring unit includes：

Sending module measures message for sending first to the UE, and the first measurement message is used to indicate the UE and measures The SINR of the serving cell；

Receiving module, the first measurement result sent for receiving the UE include described first in first measurement result SINR, the first SINR are the SINR for the serving cell that the UE measurements obtain.

8. base station according to claim 7, which is characterized in that the sending module, if it is small to be additionally operable to the first SINR In equal to thresholding is measured, then sends second to the UE and measure message, the second measurement message is used to indicate the UE and measures The SINR of second community, described second measures the mark and handoff threshold for including the second community in message, and described second is small Area is adjacent cell to be measured；

The receiving module is additionally operable to receive the second measurement result that the UE is reported, includes in second measurement result：Institute The mark of first community and the 2nd SINR are stated, the first community is in the second community that the UE measurements obtain SINR is more than the cell of the handoff threshold, and the 2nd SINR is the SINR for the first community that the UE measurements obtain.

9. according to the base station described in any one of claim 6-8, which is characterized in that the determination unit includes：

Searching module, of the available RB of the first SINR and the serving cell for being obtained according to the acquiring unit Number searches the first mapping table, obtains the first data rate, and first data rate is the UE in the serving cell The data rate of downlink；

The searching module is additionally operable to the available of the 2nd SINR obtained according to the acquiring unit and the first community The number of RB searches first mapping table, obtains the second data rate, and second data rate is the UE described the The data rate of downlink in one cell；

Wherein, first mapping table is the mapping table pre-saved in the base station, and first mapping table is used to indicate SINR, the correspondence between the number and data rate of RB can be used.

10. base station according to claim 8, which is characterized in that the base station further includes：

Updating unit, if for the determination unit determine the UE the first community downlink data rate Less than or equal to the determination unit determine the UE the serving cell downlink data rate, then by the survey Measuring thresholding reduces preset value, and using the measurement thresholding after reduction as new measurement thresholding.