KR20150082933A - Method for determining handover - Google Patents

Abstract

A method for determining handover is disclosed. Among multiple cells nearby a serving cell in which a mobile terminal is accessed, by determining a specific adjacent cell, which is estimated to have the fastest speed with respect to data transmission, as a target cell, speed decrease in data transmission due to handover can be prevented.

Description

[0001] METHOD FOR DETERMINING HANDOVER [0002]

The present invention relates to a method and apparatus for determining a particular neighboring cell calculated as a fastest expected rate associated with data transmission among a plurality of neighbor cells adjacent to a serving cell to which the mobile terminal is connected, It is about the plan.

2. Description of the Related Art In recent mobile communication systems, a mobile station is handed over to another frequency band (Inter Frequency) or another system (Inter RAT) based on a radio environment or load of neighboring cells adjacent to a serving cell or a serving cell, ).

In the case of the existing mobile communication system, since the voice-oriented service is mainly used, the minimum transmission speed required for the service is not large. Therefore, the good and bad of the wireless environment should be given priority as a criterion for determining the handover.

On the other hand, in recent years, data-oriented services have become mainstream rather than voice-oriented services. As a condition for determining handover, data transmission speeds before and after handover have become more important.

In the case of the data transmission rate, not only the radio environment in the cell but also the size of the resource block allocated to the mobile terminal is greatly influenced. However, in the determination of the handover, to be.

In this way, since spare resources are not considered in determining the handover, although the data transmission rate is an important determining factor, there is a problem that it is not reflected in the determination of the handover.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and it is an object of the present invention to provide a method and apparatus for estimating an expected rate associated with data transmission among a plurality of neighbor cells adjacent to a serving cell to which a mobile terminal is connected, The mobile terminal determines a specific neighbor cell to be handed over as a target cell to be handed over, thereby preventing a data transmission rate from being reduced due to a handover.

According to a first aspect of the present invention, there is provided a handover determining method comprising: a confirming step of confirming a radio environment and a load for a plurality of neighboring cells adjacent to a serving cell to which a mobile station is connected; Calculating expected speeds associated with data transmission in the plurality of neighboring cells based on at least one of an identified radio environment and a load for the plurality of neighboring cells; And a determining step of determining, as a target cell to be handed over by the mobile terminal, a specific neighboring cell in which the expected rate is calculated fastest among the plurality of neighboring cells.

More specifically, the calculating further calculates an expected rate associated with data transmission for the serving cell based on at least one of a radio environment and a load for the serving cell, And determines the target cell as a final target cell to be performed by the mobile terminal when the expected rate of the determined specific neighboring cell is faster than the expected rate of the serving cell.

More specifically, the radio environment is a reference signal received power (RSRP) for each of the serving cell and the plurality of neighbor cells received from the mobile terminal.

More specifically, the load is a capacity weight, which is a ratio of a required resource required for a service to be used by the mobile station to an available resource (RB) allocated to the mobile station.

More specifically, the expected rate is a result of summing up the radio environment weights, which are differently designated according to the magnitude of the reference signal received power, and the capacity weight.

More specifically, the expected rate for the serving cell may be determined by compensating a data transmission rate that can be reduced when the mobile station performs handover from the serving cell to the target cell, in addition to the radio environment weight and the capacity weight. Is a result value obtained by additionally summing up the compensation weights designated for performing the above-described operations.

According to the handover determination method of the present invention, among a plurality of neighboring cells adjacent to a serving cell to which the mobile terminal is connected, the mobile terminal determines a specific neighbor cell, which is calculated to have the fastest expected rate associated with data transmission, It is possible to expect an improvement in the data transmission speed due to the handover.

1 is a schematic configuration diagram of a handover determination system according to an embodiment of the present invention;
2 is a schematic configuration diagram of a base station apparatus according to an embodiment of the present invention;
3 is a flowchart illustrating an operation flow in a handover determination system according to an embodiment of the present invention.
4 is a flowchart illustrating an operation flow in a base station apparatus according to an embodiment of the present invention;

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a handover determination system according to an embodiment of the present invention.

1, a handover determination system according to an embodiment of the present invention includes a mobile terminal 100 connected to a serving cell, and a neighboring cell (a, b, c) adjacent to the serving cell, And a base station apparatus (200) in which the mobile terminal (100) determines a target cell to perform handover.

Here, the mobile terminal 100 refers to a mobile device that is located in a serving cell and neighboring cells (a, b, c) and is capable of wireless network connection.

For example, the mobile terminal 100 may be a smart phone, a notebook computer, a tablet PC, and the like, but not limited thereto, all devices capable of wireless network connection may be applicable.

For example, the wireless network refers to an LTE (Long Term Evolution) network that is a next generation mobile communication network based on an IMS (IP Multimedia Subsystem) network.

The base station apparatus 200 is located in a serving cell to which the mobile terminal 100 is connected and uses a service (e.g., FTP, streaming, web search, Voice), for example, an e-NodeB may be applied thereto.

Of course, a base station apparatus (not shown) for processing a service based on the wireless network is located in each of neighboring cells a, b, and c located adjacent to the serving cell as well as the serving cell.

Meanwhile, according to an embodiment of the present invention, in the base station apparatus 200, among the neighbor cells a, b, and c adjacent to the serving cell, the mobile terminal 100 operates to determine a target cell to perform handover do.

In recent years, with the introduction of LTE systems, data-oriented services have become mainstream rather than voice-oriented services.

As a condition for determining the handover, not only the radio environment of each of the serving cell and the neighboring cells (a, b, c), but also the data transmission rate before and after handover are important.

In the case of the data transmission rate, the size of the resource block allocated to the mobile station 100 is greatly influenced by the serving cell and the neighboring cells a, b, and c. However, The available resources are not considered.

As described above, in determining the handover, since the spare resources in each of the serving cell and the neighboring cells a, b, and c are not considered, the data transmission speed after the handover is substantially reduced due to the lack of spare resources And the handover inbound call to a specific cell is continuously increased, resulting in a problem that the degree of coexistence increases.

Accordingly, in an embodiment of the present invention, in determining the handover to the mobile terminal 100 connected to the serving cell, not only the radio environment of each of the serving cell and the adjacent cells (a, b, c) We will propose a way to consider the resources together, which will be described in detail below.

First, the mobile terminal 100 performs a function of transmitting information related to a neighboring cell.

More specifically, the mobile terminal 100 measures the reference signal received power (RSRP) measured for the neighboring cells (a, b, c) adjacent to the serving cell and the serving cell to which the mobile terminal 100 is connected To the base station apparatus 200 located in the serving cell as information related to the neighboring cell.

At this time, the mobile terminal 100 transmits the measured reference signal reception power only to the upper N adjacent cells having a large reference signal reception power among all the neighbor cells adjacent to the serving cell.

Of course, the mobile terminal 100 may transmit the reference signal reception power to the base station apparatus 200 only when the current state meets the handover condition. In the case of the handover condition, for example, And a case where there are more than the set number of neighbor cells having a threshold value or more.

The base station apparatus 200 performs a function of confirming the radio environment of each cell.

More specifically, the base station apparatus 200 receives from the mobile terminal 100 connected to the serving cell the reference signal reception power (i, j) measured for each of the serving cell and the adjacent cells (a, b, RSRP (reference signal received power), and confirms the magnitude of the received reference signal reception power as a radio environment for each of the serving cell and the adjacent cells (a, b, c).

In addition, the base station apparatus 200 performs a function of checking the load of each cell.

More specifically, when the radio environment for each of the serving cell and the neighboring cells a, b, and c is confirmed, the base station 200 transmits the serving cell and the neighboring cells a, b, and c (RB) allocated to the mobile terminal 100 in each of the serving cell and the neighboring cells a, b, and c in order to check the load of the serving cell The capacity weight corresponding to the ratio between the required resources required in the service (e.g., FTP, streaming, web search, voice) is confirmed as a load on each of the serving cell and the adjacent cells (a, b, c).

Further, the base station apparatus 200 performs a function of calculating an expected speed.

More specifically, when the radio environment and the load are confirmed, the base station apparatus 200 calculates radio environment weights differently assigned to the serving cell and the neighboring cells a, b, and c, respectively, The handover weight, which is the sum of the capacity weights, is calculated as the expected speed related to the data transmission.

Here, when calculating the expected rate for the serving cell, the base station 200 compensates the data transmission rate that can be reduced in the case of performing the handover from the serving cell to the target cell, in addition to the radio environment weight and the capacity weight The expected weight for the serving cell is calculated by additionally adding the designated compensation weights.

In addition, the base station apparatus 200 performs a function of determining a target cell.

More specifically, when the expected rate calculation for each of the serving cell and the neighboring cells a, b, and c is completed, the base station apparatus 200 determines whether the expected rate is the fastest among the neighboring cells a, b, The mobile terminal 100 determines a neighbor cell as a target cell to be handed over from the serving cell and transmits a handover execution command to the determined target cell to the mobile terminal 100.

At this time, the base station apparatus 200 determines the target cell only when there is a neighbor cell in which the expected rate is calculated faster than the serving cell, and if there is no adjacent cell with a higher expected rate than the serving cell, The mobile station 100 does not perform the handover itself.

Hereinafter, a configuration of a base station apparatus 400 according to an embodiment of the present invention will be described in more detail with reference to FIG.

That is, the base station 200 according to an exemplary embodiment of the present invention includes a checking unit 220 for checking a radio environment and a load for each cell, a calculating unit 230 for calculating an expected speed associated with data transmission in each cell, And a determination unit 240 for determining a target cell in which the mobile terminal 100 performs a handover.

The base station apparatus 200 according to an embodiment of the present invention includes a receiver 410 for receiving reference signal reception power for a serving cell and neighboring cells a, b, and c from the mobile terminal 100, As shown in FIG.

Here, all or a part of the configuration of the base station apparatus 100 described above may be implemented as a form of software module executed by a processor or hardware, or a combination thereof.

First, the confirmation unit 220 performs a function of confirming the radio environment of each cell.

More specifically, the confirmation unit 220 confirms a radio environment for each of the serving cell to which the mobile terminal 100 is connected and the adjacent cells (a, b, c) adjacent to the serving cell.

At this time, the receiver 210 measures the reference signal reception power (RSRP) measured for each of the serving cell and neighboring cells (a, b, c) connected thereto from the mobile terminal 100 connected to the serving cell Signal Received Power).

Accordingly, the acknowledgment unit 220 confirms the magnitude of the reference signal reception power received by the reception unit 210 as a radio environment for the serving cell and the neighboring cells a, b, and c, respectively.

Here, the mobile terminal 100 transmits the measured reference signal reception power only to the upper N adjacent cells having a large reference signal reception power among all the neighbor cells adjacent to the serving cell.

Of course, the mobile terminal 100 may transmit the reference signal reception power to the base station apparatus 200 only when the current state meets the handover condition. In the case of the handover condition, for example, And a case where there are more than the set number of neighbor cells having a threshold value or more.

For reference, the reference signal received power refers to the reception index for the antenna signal strength in each cell. If the value is larger (for example, -110 <-105 <-100 <-95 <-90) It can be confirmed that it is good.

The confirmation unit 220 stores the reference signal reception power for the serving cell and the neighboring cells a, b, and c as a radio environment, and stores the reference signal reception power in the buffer. For example, As shown in Table 1, radio environment weights assigned differently according to their sizes are given.

The reference signal received power (RSRP) Wireless environment weight ~ -90dBm 0.8 ~ -95 dBm 0.6 ~ -100dBm 0.5 ~ -105dBm 0.4 ~ -110 dBm 0.3

In addition, the verification unit 220 performs a function of confirming the load of each cell.

More specifically, when the radio environment for each of the serving cell and the neighboring cells a, b, and c is confirmed, the identifying unit 220 determines whether the radio environment is confirmed in each of the serving cell and the neighboring cells a, b, Check the load.

At this time, the confirmation unit 220 can allocate to the mobile terminal 100 in each of the serving cell and the neighboring cells a, b, and c to check the load of each of the serving cell and the neighboring cells a, b, (RB, Resource Block), and the resources required by the currently used services (e.g., FTP, streaming, Web search, voice) currently used by the mobile terminal in the serving cell.

When the spare resource and the used service are confirmed, the confirmation unit 220 stores the capacity weight corresponding to the ratio of the resources required for the spare resource to the serving cell and the adjacent cells (a, b, c) It is confirmed as a load.

[Equation 1]

Capacity weight (load) Free resource = free resource / required resource

For example, capacity weights identified as the loads of the serving cell and the adjacent cells (a, b, c) in the confirmation unit 220 may be as shown in Table 2 below.

Free Resources (RB)
Capacity weight Service (required resources) FTP 50, Streaming (25) Web Search (10) Voice (5) 50 One One One One 40 0.8 One One One 30 0.6 One One One 10 0.2 0.4 One One 5 0.1 0.2 0.5 One

In this way, the capacity weight is determined as the ratio of the resources required to the spare resources. If the spare resources are larger than the required resources, the maximum value can be identified as '1' regardless of the ratio.

That is, when the mobile terminal 100 is using 'FTP' with a required resource of '25' in the serving cell and the spare resource is identified as' 50 ', the actual calculated value of the capacity weight is' 2 (50/25) However, since the maximum value is designated as '1', the capacity weight is identified as the maximum value '1'.

Then, the calculating unit 230 performs a function of calculating an expected speed.

More specifically, when the radio environment and the load are confirmed, the calculating unit 230 calculates an expected rate associated with data transmission in each of the serving cell and the neighboring cells (a, b, c) based on the confirmed radio environment and load .

At this time, the calculating unit 230 calculates a handover weight, which is a result of summing the radio environment weight and the capacity weight, for each of the serving cell and the neighboring cells a, b, It is calculated as an associated expected speed.

[Equation 2]

Expected rate (neighbor cell) = Wireless environment weight + capacity weight

On the other hand, when the mobile terminal 100 performs handover from the serving cell to the target cell, the data transmission rate can be reduced.

Accordingly, when calculating the expected rate for the serving cell, the calculating unit 230 is reduced in the case of performing the handover from the serving cell to the target cell, in addition to the radio environment weight and the capacity weight, as in Equation (3) Which is a result obtained by additionally summing up the designated compensation weights, to compensate for the data transmission speed at which the mobile station can receive the data.

[Equation 3]

Expected rate (serving cell) = Wireless environment weight + capacity weight + compensation weight

For example, when the mobile terminal 100 is using 'FTP' as the service to be used, the compensation weight is designated as '0.1', and the radio environment and spare resources of the serving cell and the neighboring cells a, b, In the case of [Table 3] below, the expected speed can be calculated as follows.

Wireless Environment (RSRP) Free resources Serving cell -93dBm 30 The adjacent cell (a) -94dBm 40 The adjacent cell (b) -91dBm 10 The adjacent cell (c) -91dBm 10

That is, referring to [Table 1] and [Table 2], the expected rate of the serving cell is 1.3 [0.6 (wireless environment weight) + 0.6 (capacity weight) + 0.1 ) And the expected speed of the adjacent cell (b) and the adjacent cell (c) is 0.8 [0.6 (wireless environment weight) + 0.2 (Capacity weight)] '.

On the other hand, when 'voice call' is being used as a service in the mobile terminal 100, the expected speed of the serving cell is 1.7 [0.6 (wireless environment weight) + 1.0 (capacity weight) , And the expected rate of the neighboring cell a, neighboring cell b, and neighboring cell c can be calculated as 1.6 [0.6 (radio environment weight) + 1.0 (capacity weight)].

Then, the determination unit 240 performs a function of determining a target cell.

More specifically, when the expected speed calculation for each of the serving cell and the neighboring cells a, b, and c is completed, the determining unit 240 determines that the mobile terminal 100 performs the handover based on the calculated expected speed Determines a target cell and transmits a handover execution command to the determined target cell to the mobile terminal 100.

At this time, the determining unit 240 determines the target cell in which the mobile terminal 100 performs handover from the serving cell to the specific neighbor cell in which the expected rate is calculated the fastest among the neighbor cells a, b, and c.

For example, if the expected rate of the serving cell is 1.3, the expected rate of the adjacent cell a is 1.4, and the expected rate of the adjacent cell b and the adjacent cell c is 0.8, And can be determined as the adjacent cell (a) having the highest expected rate.

It is needless to say that the target cell must have a higher expected rate than the serving cell.

As described above, the determination of the target cell only for the neighboring cell in which the expected rate is calculated faster than the serving cell is to prevent the actual data transmission rate from decreasing after the handover.

For this, the determination unit 240 determines the target cell only when there is a neighbor cell in which the expected rate is calculated faster than the serving cell, and if there is no adjacent cell with a higher expected rate than the serving cell, The mobile station 100 does not perform handover.

For example, if the expected speed of the serving cell is '1.7' and the expected rate of both the adjacent cell a, the adjacent cell b and the adjacent cell c is 1.6 [radio environment weighted weight] + 1.0 Weight])], the mobile terminal 100 does not perform the handover because there is no neighbor cell with a higher expected rate than the serving cell.

As described above, according to the handover determination system according to the embodiment of the present invention, among the plurality of neighbor cells adjacent to the serving cell to which the mobile terminal 100 is connected, The mobile terminal 100 determines the target cell to be handed over by determining the target cell considering the expected rate based on the spare resources of the serving cell and the neighboring cell, It is possible to expect an improvement in the data transmission speed and to prevent the handover inbound call to the target cell from being continuously increased and the degree of coexistence being increased.

Hereinafter, a handover determination method according to an embodiment of the present invention will be described with reference to FIG. 3 and FIG. Here, for convenience of explanation, the components shown in Figs. 1 and 2 will be described with reference to corresponding reference numerals.

First, the operation flow in the handover determination system according to an embodiment of the present invention will be described with reference to FIG.

First, the mobile terminal 100 measures the reference signal received power (RSRP) measured for the neighboring cells a, b, and c adjacent to the serving cell and the serving cell to which the mobile terminal 100 is connected, To the base station apparatus 200 located in the serving cell (S110).

At this time, the mobile terminal 100 transmits the measured reference signal reception power only to the upper N adjacent cells having a large reference signal reception power among all the neighbor cells adjacent to the serving cell.

Then, the base station apparatus 200 transmits the measured reference signal reception power (RSRP) to the serving cell and the neighboring cells (a, b, c) connected thereto from the mobile terminal 100 connected to the serving cell (Reference Signal Received Power), and confirms the size of the received reference signal reception power as a radio environment for each of the serving cell and the neighboring cells a, b, and c (S120).

Then, when the radio environment for the serving cell and the neighboring cells a, b, and c is confirmed, the base station apparatus 200 determines that the serving cell and neighboring cells a, b, (RB) allocated to the mobile terminal 100 in each of the serving cell and the neighboring cells a, b, and c to check the load, (S130) as a load on the serving cell and the neighboring cells (a, b, c), respectively, corresponding to the ratio between the required resources in the required resources (e.g., FTP, streaming, web search and voice).

Next, when the radio environment and the load are confirmed, the base station apparatus 200 calculates a radio environment weight assigned differently according to the magnitude of the reference signal reception power and a radio environment weight assigned to the serving cell and the adjacent cells (a, b, c) The handover weight, which is a result of summing the weights, is calculated as an expected speed related to data transmission (S140).

At this time, when calculating the expected rate for the serving cell, the base station apparatus 200 compensates the data transmission rate that can be reduced in performing handover from the serving cell to the target cell, in addition to the radio environment weight and the capacity weight The expected weight for the serving cell is calculated by additionally adding the designated compensation weights.

Then, when the expected speed calculation for each of the serving cell and the neighboring cells a, b, and c is completed, the base station apparatus 200 determines whether a specific neighbor cell a, b, The mobile terminal 100 determines a target cell to be handed over from the serving cell and transmits a handover execution command to the determined target cell to the mobile terminal 100 in steps S150-160.

At this time, the base station apparatus 200 determines the target cell only when there is a neighbor cell in which the expected rate is calculated faster than the serving cell, and if there is no adjacent cell with a higher expected rate than the serving cell, The mobile station 100 does not perform the handover itself.

Hereinafter, the operation of the base station apparatus 200 according to an embodiment of the present invention will be described in detail with reference to FIG.

First, the receiving unit 210 receives the reference signal reception power RSRP (RSRP) measured for each of the serving cell and neighboring cells a, b, c connected thereto from the mobile terminal 100 connected to the serving cell, Signal Received Power) (S210).

Then, the confirmation unit 220 confirms the radio environment for each of the serving cell connected to the mobile terminal 100 and the neighboring cells a, b, and c adjacent to the serving cell at step S220.

At this time, the verification unit 220 confirms the magnitude of the reference signal reception power received by the reception unit 210 as a radio environment for each of the serving cell and the adjacent cells a, b, and c.

When the reference signal reception power for each of the serving cell and the neighboring cells a, b, and c is confirmed as a wireless environment, the confirmation unit 220 stores the reference signal reception power in the buffer. Different assigned wireless environment weights are assigned.

Then, when the radio environment for each of the serving cell and the neighboring cells a, b, and c is confirmed, the confirmation unit 220 determines the radio environment for each of the serving cell and the neighboring cells a, b, The load is confirmed (S230).

At this time, the confirmation unit 220 can allocate to the mobile terminal 100 in each of the serving cell and the neighboring cells a, b, and c to check the load of each of the serving cell and the neighboring cells a, b, (RB, Resource Block), and the resources required by the currently used services (e.g., FTP, streaming, Web search, voice) currently used by the mobile terminal in the serving cell.

Further, the confirmation unit 220 confirms the capacity weight corresponding to the ratio of the resources to the spare resources as a load on the serving cell and the neighboring cells a, b, and c, respectively, when the spare resources and the service are confirmed.

Next, when the radio environment and the load are confirmed, the calculating unit 230 calculates the expected speed associated with the data transmission in each of the serving cell and the adjacent cells (a, b, c) based on the confirmed radio environment and the load (S240).

At this time, the calculating unit 230 calculates a handover weight, which is a result of summing the radio environment weight and the capacity weight, for each of the serving cell and the neighboring cells a, b, and c as an expected speed associated with data transmission .

Meanwhile, when calculating the expected rate for the serving cell, the calculating unit 230 compensates the data transmission rate that can be reduced in the case of performing the handover from the serving cell to the target cell, in addition to the radio environment weight and the capacity weight Which is a result obtained by additionally summing up the compensation weights assigned to the serving cell, as the expected rate for the serving cell.

The determination unit 240 determines the expected rate for each of the serving cell and the neighboring cells a, b, and c based on the calculated expected rate, And transmits a handover execution command to the determined target cell to the mobile terminal 100 (S250 - S270).

At this time, the determining unit 240 determines the target cell in which the mobile terminal 100 performs handover from the serving cell to the specific neighbor cell in which the expected rate is calculated the fastest among the neighbor cells a, b, and c.

On the other hand, the determination unit 240 determines the target cell only when there is a neighbor cell in which the expected rate is calculated faster than the serving cell, and if there is no adjacent cell with a higher expected rate than the serving cell, 100 to avoid handover.

As described above, according to the handover determination method according to an embodiment of the present invention, among the plurality of neighbor cells adjacent to the serving cell to which the mobile terminal 100 is connected, The mobile terminal 100 determines the target cell to be handed over by determining the target cell considering the expected rate based on the spare resources of the serving cell and the neighboring cell, It is possible to expect an improvement in the data transmission speed and to prevent the handover inbound call to the target cell from being continuously increased and the degree of coexistence being increased.

Meanwhile, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, or may be embodied in a computer readable medium, in the form of a program instruction, which may be carried out through various computer means. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the handover determination method of the present invention, among a plurality of neighbor cells adjacent to a serving cell to which the mobile terminal is connected, the mobile terminal performs a handover to a specific neighbor cell in which the expected rate associated with data transmission is calculated to be the fastest The present invention is not limited not only to the use of related technologies but also to the extent that it is possible to carry out the application or operation of a device to be applied as well as to be practically and practically possible, It is a possible invention.

100:
200: base station device
210: Receiving unit 220:
230: Calculator 240:

Claims (6)

A confirming step of confirming a radio environment and a load for a plurality of neighboring cells adjacent to a serving cell to which the mobile terminal is connected;
Calculating expected speeds associated with data transmission in the plurality of neighboring cells based on at least one of an identified radio environment and a load for the plurality of neighboring cells; And
And a determination step of determining, as a target cell to be handed over by the mobile terminal, a specific neighbor cell in which the expected rate is calculated fastest among the plurality of neighbor cells. The method according to claim 1,
Wherein,
Further calculating an expected rate associated with data transmission for the serving cell based on at least one of a radio environment and a load for the serving cell,
Wherein,
Wherein the target cell is determined as a final target cell to be performed by the mobile terminal when the expected rate of the specific neighbor cell determined as the target cell is faster than the expected rate of the serving cell. 3. The method of claim 2,
In the wireless environment,
And a reference signal received power (RSRP) for each of the serving cell and the plurality of neighbor cells received from the mobile station. The method of claim 3,
The load,
Wherein the capacity weighting is a ratio of a required resource required in a utilization service used by the mobile station to a free resource (RB) allocable to the mobile station. 5. The method of claim 4,
The expected speed is,
Wherein the mobile station is a result of summing the radio environment weights differently designated according to the magnitude of the reference signal received power and the capacity weight. 6. The method of claim 5,
The expected rate for the serving cell is:
A weighting value that is a result of addition of the designated compensation weight to compensate for a data transmission rate that can be reduced when the mobile station performs handover from the serving cell to the target cell in addition to the radio environment weight and the capacity weight The handover determination method comprising:

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