JP2006333399A - Base station apparatus, method for preventing deceleration of communication apeed, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the communication speed of a mobile station apparatus from being decelerated by the decrease of the number of communication channels even if a part of a plurality of communication channels to be used by the relevant mobile station apparatus are assigned to another mobile station apparatus. <P>SOLUTION: The base station apparatus 20, which performs radio communication with a plurality of mobile station apparatuses 30 by assigning one or more communication channels to each mobile station apparatus 30, includes: a radio resource management section 122 for selecting at least one of the mobile station apparatuses 30 using a plurality of communication channels in the mobile station apparatuses 30; and a data compression section 126 for compressing communication data relating to radio communication with at least a part of the selected mobile station apparatuses. The compressed data are transmitted to the selected mobile station apparatuses 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a base station apparatus, a communication speed reduction preventing method, and a program.

  A base station apparatus in a conventional mobile communication system is assigned one or a plurality of communication channels to each of a plurality of mobile station apparatuses, and performs wireless communication with each mobile station apparatus using the allocated communication channels. There is something that is. The reason for using a plurality of communication channels for one mobile station apparatus is to increase the communication speed.

  By the way, there is a limit to the number of communication channels that the base station apparatus can use simultaneously. For this reason, in the above base station apparatus, if there is a mobile station apparatus that requests new communication even when the number of communication channels being used reaches the limit value, among the plurality of communication channels used by the mobile station apparatus Are allotted to a part of the mobile station apparatus that has newly requested communication. In this way, it is possible to provide communication opportunities equally to each mobile station apparatus.

Patent Document 1 describes a technique related to increasing the compression rate of communication data as the communication quality in the communication section is worse.
JP 2003-309541 A

  However, if a part of a plurality of communication channels used by a certain mobile station apparatus is allocated to another mobile station apparatus, the communication channels used by the mobile station apparatus decrease, and the communication speed decreases. There was a problem that.

  The present invention has been made to solve the above problems, and one of its purposes is that even if a part of a plurality of communication channels used by a mobile station apparatus is allocated to another mobile station apparatus, It is an object of the present invention to provide a base station apparatus, a communication speed lowering prevention method, and a program capable of preventing the communication speed of a mobile station apparatus from decreasing as much as a decrease in the communication channel.

  A base station apparatus according to the present invention for solving the above-described problems is a base station apparatus that performs radio communication with a plurality of mobile station apparatuses by assigning one or a plurality of communication channels to each mobile station apparatus. Radio communication between selection means for selecting at least one mobile station apparatus from mobile station apparatuses using a plurality of communication channels among the mobile station apparatuses, and at least a part of each of the selected mobile station apparatuses Compression means for compressing the communication data, and transmission means for transmitting the compressed communication data to each selected mobile station apparatus.

  According to the present invention, communication related to wireless communication with at least one mobile station apparatus that performs communication using a plurality of communication channels and at least a part of the selected mobile station apparatuses is selected. The data is compressed. In this way, even if the communication channel used by the mobile station apparatus that compresses the communication data is assigned to another mobile station apparatus, the communication speed of the mobile station apparatus is as low as the decrease in the communication channel. It can be prevented from decreasing.

  Further, in the base station apparatus, deallocating means for deallocating a communication channel for at least one of communication channels used for radio communication with a mobile station apparatus that compresses communication data by the compression means, Further, it may be included.

  ADVANTAGE OF THE INVENTION According to this invention, the said communication channel can be allocated to another mobile station apparatus by canceling | releasing allocation of the communication channel used about the mobile station apparatus which compressed communication data.

  Further, in the base station apparatus, when the number of mobile station apparatuses in communication exceeds a predetermined number, the selecting means is at least from a mobile station apparatus using a plurality of communication channels among the mobile station apparatuses. One mobile station apparatus may be selected.

  When the number of mobile station devices in communication increases, it is necessary to allow other mobile station devices to communicate by deallocating some of the communication channels for mobile station devices that use multiple communication channels. Increases nature. According to the present invention, since communication data is compressed when the number of mobile station apparatuses in communication exceeds a predetermined number, communication data can be compressed when the necessity increases. It is possible to efficiently prepare for deallocation of communication channels.

  In addition, the communication speed reduction preventing method according to the present invention provides a communication speed for performing wireless communication between a base station apparatus and a plurality of mobile station apparatuses by assigning one or a plurality of communication channels to each mobile station apparatus. A communication speed improvement method for improving, wherein a selection step of selecting at least one mobile station device from mobile station devices using a plurality of communication channels among the mobile station devices, and each of the selected mobile stations A compression step of compressing communication data related to wireless communication between at least a part of the devices and the base station device.

  The program according to the present invention is a program for causing a computer to function as a base station apparatus that performs wireless communication by allocating one or a plurality of communication channels to each mobile station apparatus with a plurality of mobile station apparatuses. Selection means for selecting at least one mobile station apparatus from mobile station apparatuses using a plurality of communication channels among the mobile station apparatuses, and at least a part of the selected mobile station apparatuses; The computer is caused to function as compression means for compressing communication data related to the wireless communication, and transmission means for transmitting the compressed communication data to each of the selected mobile station apparatuses.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a mobile communication system 10 according to the present embodiment. As shown in the figure, the mobile communication system 10 according to the present embodiment includes a base station apparatus 20, a mobile station apparatus 30, and a communication network 40.

  As illustrated in FIG. 2, the base station apparatus 20 includes a control unit 21, a storage unit 22, a wireless communication unit 23, and a network interface unit 24.

  The control unit 21 controls each unit of the base station device 20 and executes processing related to a call, data communication, or packet communication. Also, communication data compression processing described later is executed.

  The storage unit 22 operates as a work memory for the control unit 21. The storage unit 22 holds programs and parameters related to various processes performed by the control unit 21. Furthermore, the storage unit 22 is a terminal to be compressed indicating terminal use radio resource information indicating the number of mobile station apparatuses to which a communication channel is assigned in the radio communication unit 23, and a mobile station apparatus that compresses communication data by processing described later. A data compression determination threshold value that is a threshold value in a determination process (described later) about whether to compress information and communication data is stored. The storage unit 22 stores a plurality of compression algorithms having different compression methods and compression rates.

  The wireless communication unit 23 includes an aerial line, receives and demodulates a voice signal, a communication packet, and the like from the mobile station device 30 and outputs them to the control unit 21 or according to an instruction input from the control unit 21. Processing such as modulating an audio signal or a communication packet input from the unit 21 and outputting it via an antenna is performed. The wireless communication unit 23 includes a plurality of communication channels for performing communication with the mobile station device 30. The communication channel here is used for performing communication of one mobile station apparatus 30 at the same time, such as a time slot in time division multiplexing.

  The wireless communication unit 23 assigns one or more communication channels to the mobile station device 30 that is about to start communication. The mobile station device 30 communicates with the base station device 20 through the communication network 40 using one or more assigned communication channels.

  The network interface unit 24 is connected to the communication network 40 and receives an audio signal, a communication packet, and the like from the communication network 40 and outputs them to the control unit 21, or according to an instruction from the control unit 21. A packet or the like is transmitted to the communication network 40.

  As illustrated in FIG. 3, the mobile station device 30 includes a control unit 31, a storage unit 32, and a wireless communication unit 33.

  The control unit 31 controls each unit of the mobile station device 30 and executes processing related to a call, data communication, or packet communication. Also, application programs such as mail, VOIP, and streaming are executed, and communication data is created by the application program as necessary. Further, the communication data is extracted from the audio signal and communication packet received by the wireless communication unit 33, transferred to the application program, and processing for performing processing by the application program is also performed.

  The storage unit 32 operates as a work memory for the control unit 31. Further, the storage unit 32 holds programs and parameters related to various processes performed by the control unit 31.

  The wireless communication unit 33 includes an aerial line, and modulates a voice signal, a communication packet, and the like according to an instruction input from the control unit 31 and outputs the modulated signal or the voice signal or communication packet arriving at the aerial line. A process of receiving and demodulating and outputting to the control unit 31 is performed. The wireless communication unit 33 communicates with the base station device 20 through the communication network 40 using one or a plurality of communication channels assigned from the base station device 20.

  In the present embodiment, base station apparatus 20 selects at least one mobile station apparatus 30 from mobile station apparatuses 30 using a plurality of communication channels, and compresses communication data for the selected mobile station apparatus 30. Communication data compression processing is performed. Furthermore, the base station device 20 uses at least one of the communication channels used for wireless communication with the mobile station device 30 for at least one mobile station device 30 among the mobile station devices 30 that has compressed the communication data. Communication channel assignment control processing for releasing communication channel assignment for one is performed.

  Hereinafter, the communication data compression process and the communication channel assignment control process will be described in detail with reference to FIG. First, communication data compression processing will be described while explaining normal communication data processing in the mobile communication system 10.

  FIG. 4 is a functional block diagram of the mobile communication system 10. As shown in the figure, the mobile station device 30 functionally includes a signal processing unit 108, an intermediate layer reception processing unit 109, data decompression in addition to the application unit 100, the intermediate layer transmission processing unit 101, and the signal processing unit 102. A determination unit 110, a data decompression unit 111, and an application unit 112 are included. Also, the base station device 20 is functionally configured to include a signal processing unit 120, an intermediate layer reception processing unit 121, a radio resource management unit 122, a data compression determination unit 124, a compression algorithm selection unit 125, a data compression unit 126, and a data compression. The information adding unit 127, the intermediate layer compressed transmission processing unit 128, the intermediate layer uncompressed transmission processing unit 130, and the signal processing unit 131 are configured.

  More specifically, the signal processing unit 102 and the signal processing unit 108 are realized by the control unit 31 and the wireless communication unit 33, and the application unit 100, the intermediate layer transmission processing unit 101, the intermediate layer reception processing unit 109, and the data decompression determination unit 110. The data decompression unit 111 and the application unit 112 are realized by the control unit 31. In addition, the signal processing unit 120 and the signal processing unit 131 are realized by the control unit 21 and the wireless communication unit 23, and the intermediate layer reception processing unit 121, the radio resource management unit 122, the data compression determination unit 124, the compression algorithm selection unit 125, the data The compression unit 126, the data compression information addition unit 127, the intermediate layer compression / transmission processing unit 128, and the intermediate layer uncompressed transmission processing unit 130 are realized by the control unit 21.

  The application unit 100 generates communication data by an application program, and outputs the generated communication data to the intermediate layer transmission processing unit 101. The intermediate layer transmission processing unit 101 acquires the input communication data as an intermediate layer signal and outputs it to the signal processing unit 102. The signal processing unit 102 generates a wireless communication signal including the input intermediate layer signal, and transmits the wireless communication signal from the antenna provided in the wireless communication unit 33 to the wireless section.

  Thus, the mobile station apparatus 30 first acquires an intermediate layer signal indicating communication data. Then, a radio signal including the acquired intermediate layer signal is generated, and the generated radio signal is transmitted.

  The signal processing unit 120 receives the radio communication signal transmitted from the mobile station device 30 and outputs the radio communication signal to the intermediate layer reception processing unit 121. The intermediate layer reception processing unit 121 extracts an intermediate layer signal included in the input wireless communication signal, and outputs it to the radio resource management unit 122 as communication data.

  The radio resource management unit 122 outputs the communication data input from the intermediate layer reception processing unit 121 to the communication network 40 via the network interface unit 24. In addition, the radio resource management unit 122 periodically counts the number of mobile station devices 30 that are in communication by monitoring communication performed between the communication network 40 and the mobile station device 30. Then, the number of the mobile station devices 30 in communication obtained as a result of the counting is written in the storage unit 22 as terminal use radio resource information each time the count is performed.

  The radio resource management unit 122 determines whether the number of mobile station devices 30 indicated by the terminal use radio resource information exceeds the data compression determination threshold stored in the storage unit 22. When the determination result is affirmative, the radio resource management unit 122 performs a compression terminal determination process for determining the mobile station device 30 that compresses communication data.

  Details of the compression terminal determination processing will be described. As described above, in the mobile communication system 10, one or more communication channels are assigned to each mobile station device 30, and wireless communication between the base station device 20 and the plurality of mobile station devices 30 is performed. The radio resource management unit 122 is a mobile station apparatus indicated by terminal use radio resource information from among the mobile station apparatuses 30 using a plurality of communication channels among the mobile station apparatuses 30 performing such radio communication. At least one mobile station apparatus 30 is selected according to the number 30 and the data compression determination threshold.

  Specifically, the radio resource management unit 122 calculates the difference between the number of mobile station devices 30 in communication and the data compression determination threshold value. And the mobile station apparatus 30 of the number equal to the said difference is selected from the mobile station apparatuses 30 using the some communication channel. When the number of mobile station devices 30 using a plurality of communication channels is less than the number equal to the above difference, only all the mobile station devices 30 using a plurality of communication channels may be selected. Alternatively, after selecting all the mobile station devices 30 using a plurality of communication channels, the mobile station device 30 using only one communication channel may be selected.

  Then, the radio resource management unit 122 determines the selected mobile station device 30 as the mobile station device 30 that compresses the communication data, and writes the compression target terminal information indicating the determined mobile station device 30 in the storage unit 22.

  The radio resource management unit 122 also transmits communication data transmitted from the communication network 40 to which transmission destination information indicating the mobile station device 30 serving as a transmission destination is added via the network interface unit 24. Acquired and output to the data compression determination unit 124. The communication data transmitted from the communication network 40 to the mobile station device 30 is generated by the same application program as the communication data transmitted from the mobile station device 30 to the communication network 40.

  Next, the data compression determination unit 124 reads the compression target terminal information stored in the storage unit 22. In addition, the data compression determination unit 124 acquires transmission destination information added to the communication data input from the radio resource management unit 122. Then, the data compression determination unit 124 indicates that the mobile station device 30 indicated by the acquired transmission destination information is a mobile station device 30 that compresses communication data by the read compression target terminal information. It is determined whether or not.

  The data compression determination unit 124 outputs communication data with a positive determination result to the compression algorithm selection unit 125, and outputs communication data with a negative determination result to the intermediate layer uncompressed transmission processing unit 130.

  The compression algorithm selection unit 125 outputs the input communication data to the data compression unit 126. In addition, the compression algorithm selection unit 125 selects a compression algorithm for compressing the communication data from a plurality of compression algorithms stored in the storage unit 22, and outputs the compression algorithm in association with the communication data to the data compression unit 126. The compression algorithm selection unit 125 selects a compression algorithm suitable for communication data from among the compression algorithms stored in the storage unit 22. It should be noted that a different compression algorithm may be selected according to the terminal use radio resource information and other information indicating the use status of radio resources.

  The data compression unit 126 compresses the communication data input from the compression algorithm selection unit 125 using a compression algorithm input in association with the communication data. Then, the compressed communication data and data compression information indicating a compression algorithm for compressing the communication data are output to the data compression information adding unit 127 in association with the communication data.

  The data compression information adding unit 127 adds the data compression information input in association with the communication data to the input communication data. Specifically, it is preferable to add data compression information to the head of communication data. The data compression information adding unit 127 outputs the communication data to which the data compression information is added to the intermediate layer compression transmission processing unit 128.

  The intermediate layer compression transmission processing unit 128 acquires the communication data (compressed communication data after adding the data compression information) input from the data compression information addition unit 127 as an intermediate layer signal. And it outputs to the signal processing part 131. At this time, the communication data input from the data compression information adding unit 127 may be temporarily stored in the storage unit 22 and acquired as an intermediate layer signal after a predetermined time has elapsed.

  The intermediate layer uncompressed transmission processing unit 130 acquires the communication data (uncompressed communication data) input from the data compression determination unit 124 as an intermediate layer signal. Then, the signal is output to the signal processing unit 131.

  The signal processing unit 131 generates a wireless communication signal including the intermediate layer signal input from the intermediate layer compressed transmission processing unit 128 or the intermediate layer uncompressed transmission processing unit 130, and from the antenna included in the wireless communication unit 23, the wireless section To send.

  The signal processing unit 108 receives the radio communication signal transmitted from the base station apparatus 20 and outputs it to the intermediate layer reception processing unit 109. The intermediate layer reception processing unit 109 extracts an intermediate layer signal included in the input wireless communication signal, and outputs it to the data decompression determination unit 110 as communication data. The data decompression determination unit 110 determines whether or not data compression information is added to the communication data. If the data compression information is added to the communication data, the communication data is output to the data decompression unit 111. If the data compression information is not added to the communication data, the communication data is output to the application unit. To 112.

  The data decompression unit 111 decompresses the communication data using a compression algorithm indicated by the data compression information added to the communication data input from the intermediate layer reception processing unit 109. Note that a compression algorithm may be stored in the storage unit 32 for this processing. The data decompression unit 111 outputs communication data obtained by decompression to the application unit 112.

  The application unit 112 performs processing by the application program on the input communication data.

  As described above, communication data compression processing is performed in the mobile communication system 10.

  Next, communication channel assignment control processing will be described.

  As described above, the radio resource management unit 122 performs processing for allocating one or a plurality of communication channels to the mobile station device 30 that starts communication, and cancels allocation or reassigns as necessary. Process.

  Specifically, the radio resource management unit 122 selects at least one mobile station device 30 among the mobile station devices 30 that have decided to compress communication data in the communication data compression process. And about the selected mobile station apparatus 30, the communication channel allocation about at least one of the communication channels currently used for the radio | wireless communication with the said mobile station apparatus 30 is cancelled | released. In this way, the radio resource management unit 122 secures a free communication channel. And the radio | wireless resource management part 122 allocates the free communication channel secured by canceling | releasing allocation with respect to the mobile station apparatus 30 which starts communication.

  The radio resource management unit 122 re-establishes the communication channel after a predetermined time (for example, after 100 milliseconds) with respect to the mobile station apparatus 30 in which the communication channel to be used is reduced by releasing the communication channel assignment in this way. Assign.

  Note that the radio resource management unit 122 determines that there is no communication channel to be reassigned when there are no more than a predetermined number of free communication channels. In such a case, the radio resource management unit 122 waits until a predetermined number or more of free communication channels are secured, and when a predetermined number or more of free communication channels can be secured, the radio resource management unit 122 sets the communication channels in the order in which the communication channel assignment is released. Reassign. By doing so, each mobile station device 30 is given equal communication opportunities.

  Note that the radio resource management unit 122 may store the mobile station device 30 to which the communication channel that has been unassigned by the above processing is assigned, together with the time at which the communication channel is assigned, in the storage unit 22. Then, when there is no free communication channel to be reassigned to the mobile station apparatus with a reduced number of communication channels to be used, the mobile station apparatus to which the communication channel is assigned at an earlier time among the stored mobile station apparatuses 30 The communication channels may be deassigned in order from 30 and reassigned to the mobile station apparatus having a reduced number of communication channels that use the deassigned communication channels.

  In addition, when reassignment is performed after the communication channel assignment is canceled in the communication channel assignment control process, the communication data control process is started again so that a mobile station apparatus 30 different from the reassigned mobile station apparatus 30 is selected. It is also possible to make it. Specifically, the mobile station device 30 that has performed the reassignment is stored, and in the compression terminal determination process, the stored mobile station device 30 is excluded from selection targets, and then the mobile station device 30 is selected. It is preferable to carry out. This also makes it possible to give each mobile station apparatus 30 equal communication opportunities.

  Next, processing of the base station apparatus 20 according to the present embodiment will be described with reference to a flowchart.

  FIG. 5 is a flowchart of processing of the base station apparatus 20 according to the present embodiment. As shown in the figure, the base station device 20 first acquires the number of mobile station devices in communication (number of users), and determines whether or not it is larger than the data compression determination threshold Cx (S100). The determination process of S100 is periodically repeated until a determination result that is greater than the data compression determination threshold Cx is obtained. When determining that the value is larger than the data compression determination threshold Cx, the base station apparatus 20 secures a storage area for the variable Cu, and substitutes the difference between the number of users and the data compression determination threshold Cx (S102). Then, one mobile station device Ux is selected at random from the mobile station devices Ux in communication (S104), and it is determined whether or not the selected mobile station device Ux uses a plurality of communication channels (S106). . The base station apparatus 20 repeats this selection process and determination process until a mobile station apparatus Ux determined to be using a plurality of communication channels is selected.

  When the mobile station apparatus Ux determined to use a plurality of communication channels is selected, the base station apparatus 20 starts a 100 ms count process for the selected mobile station apparatus Ux (S108). This 100 ms count process will be described later.

  Next, processing for compressing communication data to be transmitted in one communication channel among communication channels used by the mobile station apparatus Ux selected in S104 is started (S110), and allocation of other communication channels is released. (S112). Note that the base station apparatus 20 continues this compression process until it is stopped by the 100 ms count process started in S108. Then, the variable count is incremented by 1 (S114). If the value of the variable count is smaller than the value of the variable Cu, the process returns to S104, and another mobile station device 30 is selected. If the value of the variable count is not smaller than the value of the variable Cu, the process is terminated. That is, the base station apparatus 20 performs communication data compression processing on the number of mobile station apparatuses Ux indicated by the variable Cu.

  FIG. 6 is a flowchart of the 100 ms count process shown in S108. This 100 ms count process is a process performed for each mobile station apparatus Ux that has started compression in S110. As shown in the figure, in the 100 ms count process, the process waits until 100 milliseconds elapse (S150). Then, when 100 milliseconds have elapsed, the communication data compression started in S110 is stopped for the mobile station device Ux that started compression in S110, and the communication channel that has been unassigned in the processing in S112 is reassigned to the mobile station device Ux. assign. The communication channel assigned at this time may be a communication channel that has been used until it is released, or may be another free communication channel.

  In this way, each mobile station apparatus Ux that has started compression in S110 is reduced in communication channels to be used and compressed communication data in the remaining communication channels for 100 milliseconds. However, after 100 milliseconds, the number of communication channels to be used is restored, and the communication data compression process is also terminated.

  Even if the communication channel used by the mobile station apparatus that compresses the communication data is allocated to another mobile station apparatus by executing the communication data compression process and the communication channel allocation control process described above, the mobile station apparatus It is possible to prevent the communication speed from decreasing as much as the communication channel decreases.

  The present invention is not limited to the above embodiment.

  For example, in the above embodiment, at least one mobile station device 30 is selected from the mobile station devices 30 using a plurality of communication channels, and communication data is compressed for the selected mobile station device 30. Further, for at least one mobile station device 30 among the mobile station devices 30 that has compressed the communication data, communication is performed on at least one of the communication channels used for wireless communication with the mobile station device 30. The channel assignment has been released. This process may be changed as follows. That is, at least one mobile station device 30 is selected from the mobile station devices 30 using a plurality of communication channels, and at least one of the communication channels used for wireless communication with the mobile station device 30 is selected. The communication channel assignment may be canceled. Then, communication data compression may be performed on the mobile station device 30 whose communication channel assignment has been canceled. Even in this case, even if the communication channel used by the mobile station apparatus that compresses the communication data is assigned to another mobile station apparatus, the communication speed of the mobile station apparatus decreases as the communication channel decreases. You can avoid it.

1 is a system configuration diagram of a mobile communication system according to an embodiment of the present invention. It is a system configuration | structure figure of the base station apparatus concerning embodiment of this invention. It is a system configuration | structure figure of the mobile station apparatus concerning embodiment of this invention. 1 is a functional block diagram of a mobile communication system according to an embodiment of the present invention. It is a flowchart of a process of the base station apparatus concerning embodiment of this invention. It is a flowchart of a process of the base station apparatus concerning embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Mobile communication system, 20 Base station apparatus, 21,31 Control part, 22,32 Storage part, 23,33 Wireless communication part, 24 Network interface part, 30 Mobile station apparatus, 40 Communication network, 100,112 Application part, 101 intermediate layer transmission processing unit, 102, 108, 120, 131 signal processing unit, 109 intermediate layer reception processing unit, 110 data decompression determination unit, 111 data decompression unit, 121 intermediate layer reception processing unit, 122 radio resource management unit, 124 Data compression determination unit, 125 compression algorithm selection unit, 126 data compression unit, 127 data compression information addition unit, 128 intermediate layer compressed transmission processing unit, 130 intermediate layer uncompressed transmission processing unit.

Claims (5)

In a base station apparatus that performs wireless communication by allocating one or a plurality of communication channels to each mobile station apparatus with a plurality of mobile station apparatuses,
Selecting means for selecting at least one mobile station device from mobile station devices using a plurality of communication channels among the mobile station devices;
Compression means for compressing communication data for wireless communication with at least a part of each of the selected mobile station devices;
Transmitting means for transmitting the compressed communication data to each selected mobile station device;
A base station apparatus comprising: The base station apparatus according to claim 1,
A deallocating unit for deallocating a communication channel for at least one of communication channels used for wireless communication with a mobile station apparatus that compresses communication data by the compression unit;
The base station apparatus further comprising: In the base station apparatus according to claim 1 or 2,
The selection means selects at least one mobile station apparatus from mobile station apparatuses using a plurality of communication channels among the mobile station apparatuses when the number of mobile station apparatuses in communication exceeds a predetermined number. ,
A base station apparatus. A communication speed reduction preventing method for improving a communication speed when performing wireless communication by allocating one or a plurality of communication channels to each mobile station apparatus between a base station apparatus and a plurality of mobile station apparatuses,
A selection step of selecting at least one mobile station device from mobile station devices using a plurality of communication channels among the mobile station devices;
A compression step of compressing communication data for wireless communication between at least a part of each of the selected mobile station devices and a base station device;
A communication speed reduction preventing method comprising: A program for causing a computer to function as a base station device that performs wireless communication by allocating one or a plurality of communication channels to each mobile station device between a plurality of mobile station devices,
Selecting means for selecting at least one mobile station device from mobile station devices using a plurality of communication channels among the mobile station devices;
Compression means for compressing communication data relating to wireless communication with at least a part of each of the selected mobile station apparatuses, and transmission means for transmitting the compressed communication data to each of the selected mobile station apparatuses ,
A program for causing the computer to function as:

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