JP2003304568A - Mobile communication system and mobile communication control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for minimizing reduction in a capacity of a mobile communication system by assigning the required and minimum number of cells to each mobile apparatus in the mobile communication system. <P>SOLUTION: A user can designate the maximum number of cells in use, and the user uses the mobile apparatus 101 to transmit the maximum number of cells designated by the user to a mobile communication control station 301 via base stations 201A, 201B. A user versus number of cell management section 305 of the mobile communication control station 301 manages information of the maximum number of cells transmitted from the mobile apparatus 101, and a base station control section 303 assigns cells to the mobile apparatus 101 by using the maximum number of cells as an upper limit. Thus, the method can save network resources and minimize the reduction in the system capacity. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a mobile communication system and a mobile communication control method.

[0002]

2. Description of the Related Art Conventionally, in a mobile communication system, a method (cell configuration) of covering a service area with a plurality of base stations has been used. When cell switching (that is, handover) is necessary due to movement of the mobile device, peripheral cells are measured prior to the switching, and the cell to switch to is selected based on the result. In addition, code division multiple access (CDM
A mobile communication system using a code division multiple access (A) method can use a method of simultaneously communicating with a plurality of cells at the time of handover (soft handover). For soft handover technology,
For example, it is described in US Pat. No. 5,101,501.

The operation of soft handover in the conventional mobile communication system will be described below with reference to the drawings. FIG. 8 is a block diagram showing a configuration of a mobile communication system adopting a conventional CDMA communication system. However,
In this figure, one mobile station 101 and two base stations 20
1A and 201B and one mobile communication control station 301 are shown, but in the following description, it is assumed that there are a plurality of mobile devices 101.

In FIG. 8, mobile unit 101 has an antenna 102, a receiving unit 103, and a despreading / rake unit 104.
A cell search unit 105, a call processing unit 106, a spreading unit 107, and a transmitting unit 108. The base station 201A includes an antenna 202A, a spreading unit 203A,
The transmission unit 204A, the despreading / rake unit 205A, and the reception unit 206A are included. The base station 201B is
Similar to the base station 201A, the antenna 202B, the spreading section 203B, the transmitting section 204B, and the despreading / rake section 20.
5B and a receiving unit 206B. The mobile communication control station 301 includes a call processing unit 302 and each mobile device 101.
Base station control unit 303 for controlling cell allocation to
And a cell designation unit 304.

The cell search unit 105 of the mobile device 101 searches for a cell to be used for transmission / reception of the mobile device 101. The call processing unit 106 includes a layer 3 (radio resource management, mobility management,
This is a protocol equivalent to call control). In this case, the call control includes control for maintaining the communication state and releasing the communication state by exchanging information such as the caller number and the callee number with the mobile communication control station 301. .

The call processing unit 106 also has a cell selection function of selecting a cell to be used for transmission / reception in each mobile unit 101 among the cells searched by the cell search unit 105. In the cell designation unit 304 of the mobile communication control station 301, the maximum number of cells to be assigned to each of the plurality of mobile devices 101 is predetermined. The base station control unit 303 controls each mobile device 10
For 1, the cells are allocated within a range that does not exceed the predetermined maximum number of cells. Regarding the maximum number of cell allocations, for example, 3GPP (3rd Generation Partnershi
p Project) 2 C. In S0005, it is defined as "6".

[0007]

However, in the conventional mobile communication system, since the maximum number of cells to be assigned to each mobile device 101 is fixed in advance in the system, the maximum number of cells should be assigned. Even users and services that are not needed will consume resources evenly, and such excessive cell allocation will reduce the number of mobile stations that can be used at the same time. There is a problem in that

The present invention has been made in view of the above points, and an object of the present invention is to provide a mobile communication system and a mobile communication control method capable of suppressing the number of cell allocations for each mobile device to a necessary minimum. And

[0009]

A mobile communication system of the invention according to claim 1 is a mobile communication system comprising a mobile device, a base station and a mobile communication control station, When a device is handed over, the number of cells to be used simultaneously is determined by either the number of cells determined by the mobile device side or the mobile communication control station side, and the number of cells determined by the cell determination device. A cell allocating means is provided for allocating a cell to the mobile device as an upper limit.

According to this structure, the minimum required cell allocation can be performed according to the needs of the user of the mobile device, and the decrease in system capacity can be minimized.

A mobile communication system according to a second aspect of the present invention is a mobile communication system including a mobile device, a base station and a mobile communication control station, wherein the mobile device simultaneously performs handover. The mobile communication control station is provided with a cell number designating unit that allows the user to designate the number of cells to be used, and the mobile communication control station controls cell allocation to the mobile unit up to the number of cells designated by the mobile unit. A configuration including a cell allocation control means is adopted.

According to this structure, the user of the mobile device specifies the number of cells to be simultaneously used in the handover, so that the mobile communication control station allocates the cells to the mobile device with the specified number of cells as an upper limit. Control. Therefore, the minimum required cell allocation can be performed according to the needs of the user of the mobile device, so that the reduction in system capacity can be minimized.

A mobile communication system according to a third aspect of the present invention is a mobile communication system including a mobile device, a base station and a mobile communication control station, wherein the mobile device is a voice call or The mobile communication control station is provided with a service specifying unit that allows a user to specify a service type such as data communication, and the mobile communication control station determines the maximum number of cells to be simultaneously used in handover according to the service type specified by the mobile device. The configuration is provided with a maximum cell number designating unit.

According to this configuration, the user of the mobile device specifies the service type such as voice call or data communication,
The mobile communication control station specifies the maximum number of cells to be simultaneously used in handover according to the specified service type. Therefore, the minimum required cell allocation can be performed according to the type of service, and the decrease in system capacity can be minimized.

A mobile communication system according to a fourth aspect of the present invention is a mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile communication control station is a channel. The configuration is provided with a maximum cell number designating unit that designates the maximum number of cells to be simultaneously used in handover according to the coding type.

According to this structure, the mobile communication control station specifies the maximum number of cells to be simultaneously used in handover according to the channel coding type. Therefore, the minimum necessary cell allocation can be performed according to the channel coding type, and the decrease in system capacity can be minimized.

A mobile communication system according to a fifth aspect of the present invention is a mobile communication system including a mobile device, a base station, and a mobile communication control station, wherein the mobile device provides communication quality. Communication quality storage means for storing, and cell maximum number determination means for determining the maximum number of cells to be simultaneously used in handover based on past communication quality stored in the communication quality storage means at the start of communication, The mobile communication control station employs a configuration including a cell allocation control unit that controls the allocation of cells to the mobile device with the maximum number of cells determined by the mobile device as an upper limit.

According to this structure, the mobile station determines the maximum number of cells to be simultaneously used in the handover based on the past communication quality at the start of communication, and the mobile communication control station determines the maximum number of cells determined by the mobile station. The cell allocation to the mobile device is controlled up to the upper limit. Therefore, the minimum required cell allocation can be performed according to the past communication quality, and the decrease in system capacity can be minimized.

A mobile communication system according to a sixth aspect of the present invention is a mobile communication system including a mobile device, a base station and a mobile communication control station, wherein the mobile device measures cell strength. And a measurement report threshold that allows the user to specify a threshold used to determine whether or not to report the cell strength measurement result measured by the cell strength measurement means to the mobile communication control station. Designating means, comprising a cell strength measurement result reporting means for reporting the cell strength measurement result to the mobile communication control station when the cell strength measurement result measured by the cell strength measuring means exceeds the threshold value, The mobile communication control station is configured to include a cell allocation control means for controlling cell allocation to the mobile device based on the cell strength measurement result reported from the mobile device.

According to this structure, the cell strength measurement for handover is performed by the mobile device, and when the cell strength measurement result exceeds the threshold specified by the user, the cell strength measurement result is reported to the mobile communication control station. Then, the mobile communication control station controls the cell allocation to the mobile device based on the cell strength measurement result. Therefore, the minimum required cell allocation can be performed according to the user's need, and the decrease in system capacity can be minimized.

A mobile communication system according to a seventh aspect of the present invention is a mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile device is a voice call or The mobile communication control station is provided with a service specifying unit that allows a user to specify a service type such as data communication, and a cell detecting unit that detects a handover target cell according to a threshold notified from the mobile communication control station. Is
Cell allocation control means for notifying the mobile device of a threshold value according to the service type specified by the mobile device and controlling the allocation of cells to the mobile device based on the cells detected by the mobile device. Adopt a configuration that has.

According to this configuration, the mobile communication control station notifies the mobile station of the threshold when the cell strength measurement for handover is performed according to the service type designated by the mobile station, and the mobile station performs handover according to this threshold. The target cell is detected, and the mobile communication control station controls the cell allocation to the mobile device based on the cell detected by the mobile device. Therefore, the minimum required cell allocation can be performed according to the service type, and the decrease in system capacity can be minimized.

A mobile communication system according to an eighth aspect of the present invention is a mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile device measures cell strength. Cell strength measuring means for carrying out, communication quality storing means for storing communication quality, and for judging whether or not to report the cell strength measurement result measured by the cell strength measuring means at the start of communication to the mobile communication control station. Threshold value determining means for determining the threshold value to be used based on the past communication quality stored in the communication quality storage means, and the cell strength when the cell strength measurement result measured by the cell strength measuring means exceeds the threshold value. Cell strength measurement result reporting means for reporting the measurement result to the mobile communication control station, wherein the mobile communication control station,
A configuration is provided that includes a cell allocation control unit that controls cell allocation to the mobile device based on a cell strength measurement result reported from the mobile device.

According to this configuration, the threshold value when the mobile unit measures the cell strength for handover is determined based on the past communication quality, and the cell strength measurement result exceeding the threshold value is reported to the mobile communication control station. The mobile communication control station controls the allocation of cells to mobile devices based on the reported cell strength measurement results. Therefore, the minimum required cell allocation can be performed according to the past communication quality, and the decrease in system capacity can be minimized.

A mobile communication control method according to a ninth aspect of the present invention is a mobile communication control method in a mobile communication system including a mobile device, a base station and a mobile communication control station, wherein When the mobile device performs a handover, the number of cells to be used at the same time is determined by either the mobile device side or the mobile communication control station side, and the mobile device is determined by the mobile communication control station side with the determined number of cells as an upper limit. It is characterized by controlling the allocation of cells to cells.

According to this method, the minimum required cell allocation can be performed according to the needs of the user of the mobile device, and the decrease in system capacity can be minimized.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is that the number of cells to be simultaneously used when a mobile station hands over is determined by either the mobile station side or the mobile communication control station side, and the determined number of cells is the upper limit. As a result, the mobile communication control station side controls the cell allocation to the mobile device to minimize the decrease in system capacity.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a mobile communication system according to Embodiment 1 of the present invention. In this figure, the same parts as those in FIG. 8 described above are designated by the same reference numerals.

In FIG. 1, the mobile unit 101 includes a cell number designating unit 110 that receives designation of the number of cells from a user, and the mobile communication control station 301 uses the maximum number of cells designated by the user of each mobile unit 101. A user-to-cell number management unit 305 that stores The base station control unit 303 of the mobile communication control station 301 specifies a cell with which each mobile device 101 communicates within the range of the maximum cell number of the user-to-cell number management unit 305. The call processing unit 30 of the mobile communication control station 301
2. Base station control unit 303 and user-to-cell number management unit 30
5 constitutes a cell allocation control means 306.

In such a configuration, when the user of the mobile device 101 designates the maximum number of cells to use to the cell number designation unit 110, the maximum number of cells is determined by the base station 201.
A is sent to the mobile communication control station 301 via the base station 201B. The user-to-cell number management unit 305 of the mobile communication control station 301 manages the maximum number of cells sent from the mobile device 101. Here, when there are a plurality of mobile devices 101, the user-to-cell number management unit 305 manages the maximum number of cells sent from each mobile device 101. The base station control unit 303 of the mobile communication control station 301 is
Cells are allocated up to the maximum number of cells desired by the user.

For example, when the user of the mobile device 101 desires continuous communication at the cell boundary, the maximum number of cells is designated as "2" or more. Base station 201A and base station 201
If B is adjacent to the mobile station 101,
While moving between A and the base station 201B, simultaneous communication with both base stations 201A and 201B is possible, so continuous communication is possible.

On the other hand, a user who does not want continuous communication at the cell boundary may specify the maximum number of cells as "1".
In this case, the user is
When moving between B, it is difficult to maintain the continuity of communication because only one of them becomes communication. However, this user contributes to the saving of network resources by communicating with only one base station at the cell boundary. For such users, a sense of unfairness can be eliminated by applying a reduction in communication charges or the like as a consideration for saving network resources.

Here, the cell allocation will be described in more detail. The cell search unit 105 of the mobile device 101 measures the levels of neighboring cells, and reports the level measurement value to the mobile communication control station 301 via the base station 201A or the base station 201B together with the cell identification information. In this case, as a reporting timing, a method of reporting when a cell having a level exceeding a threshold value set in advance in the system is detected is generally used.

In the mobile communication control station 301, the base station control unit 303 determines the cell to be assigned to the mobile device 101 according to the cell level measurement value and the identification information reported from the mobile device 101. Then, the base station 201A and the base station 201B are controlled according to the determined allocation cell, the transmission / reception start / stop is instructed, and the control message for notifying the determined cell is transmitted to the mobile device 101. When the mobile station 101 receives the control message of the allocated cell, the mobile station 101 transmits and receives according to the control message.

As described above, according to the mobile communication system of the present embodiment, the user of the mobile device 101 specifies the maximum number of cells to be simultaneously used in the handover, and the mobile communication control station 301 specifies the specified cell. Since the cell allocation to the mobile device 101 is controlled with the maximum number of the above as an upper limit, it is possible to save network resources and minimize the decrease in system capacity.

In this embodiment, the case where the maximum number of cells is "1" and the case where it is "2" or more has been described.
The same applies when the maximum number of cells is only "2" or more, and specifying a smaller maximum number of cells saves more network resources. Therefore, reduce the communication charges for users with a smaller maximum number of cells. You can

Further, in the present embodiment, the designation of the maximum cell number of each user is notified to the network side via the uplink of the mobile communication system, but the network side is previously notified to the network side by means other than the mobile communication system. It is also possible to notify.

(Second Embodiment) FIG. 2 is a block diagram showing a configuration of a mobile communication system according to a second embodiment of the present invention. In this figure, the same parts as those in FIG. 8 described above are designated by the same reference numerals. The mobile device 101
The mobile communication control station 301 includes a service specifying unit 111 that specifies a service type such as voice call or data communication by a user, and the mobile communication control station 301 manages the maximum number of cells corresponding to the service specified by each mobile device 101. The number management unit 307 is provided. The mobile communication control station 30
The one call processing unit 302, the base station control unit 303, and the service-to-cell number management unit 307 configure a maximum cell number designating unit 308.

The service type designated by the service designation unit 111 of the mobile station 101 is the base station 201A or the base station 20.
It is sent to the mobile communication control station 301 via 1B. In the service-to-cell number management unit 307 of the mobile communication control station 301,
The maximum number of cells corresponding to the service type sent from the mobile device 101 is output. The base station control unit 303 allocates cells with the maximum number of cells output from the service-to-cell number management unit 307 being the upper limit. For example, when the user selects a service that requires continuous communication such as a voice call, the maximum number of cells is designated as "2" or more. When the base station 201A and the base station 201B are adjacent to each other,
While the mobile device 101 is moving between the base station 201A and the base station 201B, simultaneous communication with both base stations is possible, so continuous communication is possible.

On the other hand, when the user selects a service such as packet communication which does not require continuous communication at the cell boundary, the maximum number of cells is designated as "1". In this case, when the user moves between the base station 201A and the base station 201B, only one of them can communicate, so that the continuity of communication cannot be maintained. However, in such a service, immediacy is not required, which is not a problem. Also, since this user only communicates with one base station at the cell boundary, network resources can be saved. For such a user, a reduction in communication charge or the like can be applied as a consideration for saving network resources.

As described above, according to the mobile communication system of the present embodiment, the maximum number of cells to be simultaneously used in handover is designated according to the service type designated by the mobile unit 101, and the maximum number of designated cells is designated. Mobile device 101 with a maximum number
Since the allocation of cells to cells is controlled, it is possible to save network resources and minimize the decrease in system capacity.

In the present embodiment, the service type corresponding to the case where the maximum number of cells is "1" and the case where it is "2" or more has been described. However, an arbitrary cell is selected according to the content of each service type. It is also possible to select the maximum number of

(Embodiment 3) FIG. 3 is a block diagram showing the configuration of a mobile communication system according to Embodiment 3 of the present invention. In this figure, the same parts as those in FIG. 8 described above are designated by the same reference numerals. Mobile communication control station 3
01 includes a channel coding type-to-cell number management unit 309 that manages the maximum number of cells corresponding to the channel coding type. The call processing unit 30 of the mobile communication control station 301
2. The base station control unit 303 and the channel coding type-to-cell number management unit 309 constitute the maximum cell number designation unit 310.

When the mobile device 101 communicates with the network, a specific channel coding type is designated. The channel coding type refers to the type of processing for converting information data that the user wants to send to a wireless signal.
For example, there are combinations of types of error correction coding, coding rates, and code spreading rates.

Channel coding type-to-cell number management unit 309
Then, the maximum number of cells is output according to the designated channel coding type. The base station control unit 303 allocates cells with the maximum number of cells from the channel coding type / cell number management unit 309 being the upper limit. For example, the maximum number of cells is set small for a channel coding type having high error correction capability and high noise performance, and the maximum number of cells is set large for other channel types. This allows
It is possible to allocate the minimum required cells according to the channel coding type so as to maintain a constant communication quality.

As described above, according to the mobile communication system of this embodiment, the maximum number of cells to be simultaneously used in handover is designated according to the channel coding type, and the maximum number of designated cells is used as the upper limit. Since the cell allocation to the machine is controlled, it is possible to save network resources and minimize the decrease in system capacity.

(Embodiment 4) FIG. 4 is a block diagram showing the configuration of a mobile communication system according to Embodiment 4 of the present invention. In addition, in FIG. 1 and FIG.
The same reference numerals are given to the portions common to. Mobile 1
01 is a communication quality storage unit 112 that stores communication quality;
A maximum cell number determination unit 113 that determines the maximum number of cells to be simultaneously used in handover based on the past communication quality stored in the communication quality storage unit 112. In addition,
The call processing unit 302, the base station control unit 303, and the user-to-cell number management unit 305 of the mobile communication control station 301 constitute cell allocation control means 311.

The communication quality storage unit 112 stores indexes relating to communication quality such as past error rates (eg, bit error rate, symbol error rate, frame error rate, block error rate) and signal-to-interference ratio. The maximum cell number determination unit 113 determines the maximum number of cells based on the past communication quality. If the past communication quality is sufficiently good, the maximum number of cells is considered to be excessive, so the maximum number of cells is reduced. On the contrary, if the past communication quality is poor, the maximum number of cells may be insufficient, so the maximum number of cells is increased.

The maximum number of cells determined by maximum cell number determining section 113 is sent to mobile communication control station 301 via base stations 201A and 201B. The user-to-cell number management unit 305 of the mobile communication control station 301 manages the maximum number of cells of each user sent from the mobile device 101.
The base station control unit 303 of the mobile communication control station 301 allocates cells up to the maximum number of cells desired by each user.

As described above, according to the mobile communication system of the present embodiment, the maximum number of cells to be simultaneously used in the handover is determined based on the past communication quality, and the maximum number of determined cells is used as the upper limit. Since the allocation of cells to the machine 101 is controlled, the required minimum number of cells can be set for each user, and the decrease in system capacity can be minimized.

(Fifth Embodiment) FIG. 5 is a block diagram showing the configuration of a mobile communication system according to a fifth embodiment of the present invention. In this figure, the same parts as those in FIG. 8 described above are designated by the same reference numerals.

In FIG. 5, the mobile station 101 includes a cell strength measuring unit 114 for measuring cell strength for handover,
The mobile communication control station 301 is provided with a measurement report threshold designating unit 115 that allows a user to designate a threshold used to determine whether or not to report the cell strength measured by the cell strength measuring unit 114 to the mobile communication control station 301. In this case, the measurement report threshold designation unit 115
Allows the user to set a threshold (hereinafter referred to as a measurement report threshold), and inputs the measurement report threshold specified by the user to the call processing unit 106B.

The call processing unit 106B is the call processing unit 10 of FIG.
In addition to having the same function as 6, the cell strength measuring unit 114 has a function of reporting the cell strength measurement result to the mobile communication control station 301 when the cell strength measurement result exceeds the measurement reporting threshold. . The mobile communication control station 301 controls cell allocation to the mobile device 101 based on the cell strength measurement result reported from the mobile device 101. The call processing unit 302 and the base station control unit 3 of the mobile communication control station 301
03 constitutes the cell allocation control means 312. The call processing unit 106B corresponds to cell strength measurement result reporting means.

In the mobile station 101 and the mobile communication control station 301 having such a configuration, for example, when the user who uses the mobile station 101 desires high quality communication, the measurement report threshold is set low (loose). As a result, the mobile device 101 can easily detect cells to be handed over, and the number of cells used simultaneously in handover increases. on the other hand,
A user who does not want high quality communication sets a high (strict) measurement report threshold. As a result, it becomes difficult for the mobile device 101 to detect a cell to be handed over, and the number of cells used simultaneously in handover is reduced. In addition,
For such a user, a reduction in communication charge or the like can be applied as a consideration for saving network resources.

As described above, according to the mobile communication system of the present embodiment, the mobile device 101 has the mobile communication control station 301.
The user of the mobile device 101 arbitrarily specifies a measurement report threshold used to determine whether to report the cell strength measurement result to the mobile communication control station 301 based on the cell strength measurement result reported from the mobile device 101. Since the cell allocation to the mobile device is controlled based on this, it is possible to save network resources and minimize the decrease in system capacity.

In the present embodiment, the measurement report threshold value is specified on the mobile device 101 side. However, on the mobile device 101 side, the user only specifies the communication quality, and on the mobile communication control station 301 side, this is done. You may make it prepare the measurement report threshold value corresponding to communication quality.

(Embodiment 6) FIG. 6 is a block diagram showing the configuration of a mobile communication system according to Embodiment 6 of the present invention. In addition, in FIG. 2 and FIG.
The same reference numerals are given to the portions common to.

In FIG. 6, the mobile communication control station 301 is
A service-to-threshold management unit 313 that manages a measurement report threshold corresponding to a service designated by the mobile device 101 is provided. The call processing unit 106C of the mobile device 101 detects a handover target cell according to the threshold notified from the mobile communication control station 301. The call processing unit 302, the base station control unit 303, and the service-to-threshold management unit 313 of the mobile communication control station 301 constitute cell allocation control means 314. The call processing unit 106C corresponds to the cell detecting means.

In the mobile device 101, the service type such as voice call or data communication is designated by the user. The designated service types are the base station 201A and the base station 20.
It is sent to the mobile communication control station 301 via 1B. The service pair threshold management unit 313 of the mobile communication control station 301 outputs the measurement report threshold corresponding to the service type sent from the mobile device 101. This measurement report threshold is the mobile device 101.
Will be notified. The call processing unit 106C of the mobile device 101 detects a cell to be a soft handover target according to the measurement report threshold notified from the mobile communication control station 301, and reports the detected cell to the mobile communication control station 301. The mobile communication control station 301 controls cell allocation to the mobile device 101 based on the reported cell detection result.

For example, when the user selects a service that requires high transmission quality, the measurement report threshold is set low (loose). As a result, the mobile device 101 can easily detect the cell to be handed over, and the number of cells used simultaneously in the handover increases. On the other hand, when the user selects a service that does not require high-quality transmission quality, the measurement report threshold can be set high (strict). As a result, it becomes difficult for the mobile device 101 to detect a cell to be handed over, and the number of cells used simultaneously in handover is reduced. For such a user, a reduction in communication charges or the like can be applied as a consideration for saving network resources.

As described above, according to the mobile communication system of the present embodiment, the measurement report threshold value for determining whether to report the cell strength measurement result according to the service type designated by the user is designated. Since the mobile communication control station 301 controls the cell allocation to the mobile device based on the cell strength measurement result reported from the mobile device 101,
Network resources can be saved, and the decrease in system capacity can be minimized.

(Embodiment 7) FIG. 7 is a block diagram showing the configuration of a mobile communication system according to Embodiment 7 of the present invention. In addition, in FIG. 8 and FIG.
The same reference numerals are given to the portions common to. In FIG. 7, the mobile device 101 is measured by the cell strength measuring unit 114 that measures the cell strength, the communication quality storage unit 112 that stores the communication quality (for example, error rate), and the cell strength measuring unit 114 when the communication starts. The measurement report threshold value determining unit 116 that determines the measurement report threshold value used to determine whether or not to report the cell strength measurement result to the mobile communication control station 301 based on the past communication quality stored in the communication quality storage unit 112. Is equipped with.

When the past communication quality is sufficiently good, the measurement report threshold value determining unit 116 is considered to have excessively allocated cells, and therefore sets the threshold value high (strictly). On the contrary, if the past communication quality is poor, the cell allocation may be insufficient, so the threshold is set low (loose).

The call processing unit 106D has a cell strength measuring unit 11
When the cell strength measurement result measured in 4 exceeds the measurement report threshold value, the cell strength measurement result is set to the mobile communication control station 301.
Report to. In the mobile communication control station 301, based on the cell strength measurement result reported from the mobile device 101, the mobile device 101
Controls the allocation of cells to. The call processing unit 302 and the base station control unit 303 of the mobile communication control station 301 constitute cell allocation control means 315. Also, the call processing unit 106
D corresponds to a cell strength measurement result reporting means.

As described above, according to the mobile communication system of the present embodiment, the threshold for determining whether or not to report the cell strength measurement result based on the stored past communication quality is specified, and the mobile communication is performed. Since the control station 301 controls the cell allocation to the mobile device 101 based on the cell strength measurement result reported from the mobile device 101, it is possible to perform the minimum required cell allocation number for each user. , It is possible to minimize the decrease in system capacity.

[0067]

As described above, according to the present invention,
By reducing the number of cells allocated to each mobile device to the required minimum, it is possible to minimize the decrease in system capacity.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a mobile communication system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a mobile communication system according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a mobile communication system according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a mobile communication system according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a mobile communication system according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram showing the configuration of a mobile communication system according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a mobile communication system according to a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a conventional mobile communication system.

[Explanation of symbols]

101 mobile station 102, 202A, 202B antenna 103, 206A, 206B receiving section 104, 205A, 205B despreading / rake section 105 cell search section 106, 106B, 106C, 106D, 302 call processing section 107, 203A, 203B spreading section 108 , 204A, 204B Transmission unit 110 Cell number designation unit 111 Service designation unit 112 Communication quality storage unit 113 Maximum cell number determination unit 114 Cell strength measurement unit 115 Measurement report threshold designation unit 116 Measurement report threshold determination unit 201A, 201B Base station 301 Move Communication control station 303 Base station control unit 305 User-to-cell number management unit 306, 311, 312, 314, 315 Cell allocation control unit 307 Service-to-cell number management unit 308, 310 Maximum cell number designation unit 309 Channel coding type to cell Number management unit 313 Bis vs. threshold management section

Claims (9)

[Claims] 1. A mobile communication system comprising a mobile device, a base station, and a mobile communication control station, wherein the number of cells used simultaneously when the mobile device performs a handover is determined by the mobile device. Side or the mobile communication control station side to determine the number of cells to be determined, cell allocation means for allocating cells to the mobile device with the number of cells determined by the cell determination means as an upper limit, A mobile communication system comprising: 2. A mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile device allows a user to specify the number of cells to be simultaneously used in handover. And a mobile communication control station comprising cell allocation control means for controlling cell allocation to the mobile device with the number of cells specified by the mobile device as an upper limit. Mobile communication system. 3. A mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile device specifies a service type such as voice call or data communication by a user. The mobile communication control station comprises a maximum cell number designating unit for designating a maximum number of cells to be simultaneously used in handover according to a service type designated by the mobile unit. A mobile communication system. 4. A mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile communication control station simultaneously uses in handover according to a channel coding type. A mobile communication system comprising a maximum cell number specifying means for specifying the maximum number of cells. 5. A mobile communication system comprising a mobile device, a base station, and a mobile communication control station, wherein the mobile device has communication quality storage means for storing communication quality, and at the time of starting communication. A maximum cell number determining unit that determines the maximum number of cells to be simultaneously used in handover based on the past communication quality stored in the communication quality storage unit, wherein the mobile communication control station is determined by the mobile device. A mobile communication system comprising cell allocation control means for controlling the allocation of cells to the mobile device with the maximum number of the established cells as an upper limit. 6. A mobile communication system including a mobile device, a base station, and a mobile communication control station, wherein the mobile device measures cell strength, and the cell strength is measured. A measurement report threshold designating unit that allows the user to designate a threshold used to determine whether or not to report the cell strength measurement result measured by the measuring unit to the mobile communication control station, and the cell strength measuring unit measures Cell strength measurement result reporting means for reporting the cell strength measurement result to the mobile communication control station when the cell strength measurement result is greater than the threshold value, wherein the mobile communication control station reports from the mobile device. A mobile communication system comprising cell allocation control means for controlling cell allocation to the mobile device based on the measured cell strength. 7. A mobile communication system comprising a mobile device, a base station and a mobile communication control station, wherein the mobile device specifies a service type such as voice call or data communication by a user. The mobile communication control station is provided with a service specifying unit that enables the service and a cell detecting unit that detects a handover target cell according to a threshold value notified from the mobile communication control station, and the mobile communication control station is a service type specified by the mobile device. And a cell allocation control means for notifying a threshold value to the mobile device according to the above, and controlling the allocation of the cell to the mobile device based on the cell detected by the mobile device. Communications system. 8. A mobile communication system comprising a mobile device, a base station, and a mobile communication control station, wherein the mobile device measures cell strength by a cell strength measuring means and communication quality. Communication quality storage means for storing, and a threshold used for determining whether or not to report the cell strength measurement result measured by the cell strength measuring means to the mobile communication control station at the start of communication in the communication quality storage means Threshold value determining means for determining based on the past communication quality, and when the cell strength measurement result measured by the cell strength measuring means exceeds the threshold value, the cell strength measurement result is reported to the mobile communication control station. Cell strength measurement result reporting means, wherein the mobile communication control station comprises cell allocation control means for controlling cell allocation to the mobile equipment based on the cell strength measurement result reported from the mobile equipment. A mobile communication system, comprising: 9. A mobile communication control method in a mobile communication system comprising a mobile device, a base station, and a mobile communication control station, wherein a cell used at the same time when the mobile device hands over. The number of cells is determined by either the mobile device side or the mobile communication control station side, and the allocation of cells to the mobile device is controlled by the mobile communication control station side with the determined number of cells as an upper limit. Mobile communication control method.