JP2006101348A - Communication system, communication device, and usage control method of communication channel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a communication completion ratio of control signals included in user data signals. <P>SOLUTION: In a mobile communication system 10 in which base station devices 30, and a plurality of mobile station devices 20 transmit and receive communication signals through at least one communication channel out of a plurality of communication channels, the base station device 30 includes an active user number discrimination part 88 which discriminates whether each mobile station device 20 is an active user, or not, and transmits a communication usage restriction signal for at least one communication channel out of the communication channels to the mobile station devices 20 discriminated as the active user. The mobile station device 20 includes a transmission channel selection part 70 which restricts transmission of a communication signal in at least one communication channel which is shown to be restricted by the control signal in a case that the control signal receiving means receives the control signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication system, a communication apparatus, and a communication channel usage control method, and more particularly to a control signal transmitted and received on a communication channel.

  In conventional communication systems, for example, as described in Patent Document 1, a communication channel and a control channel are often prepared. A control signal for communication is transmitted / received in the control channel, and a user data signal related to communication contents such as voice and packet is transmitted / received in the communication channel. In this way, communication contents and control are separated.

For example, in packet communication, if there is no distinction between a control channel and a communication channel, the amount of packets for transmitting / receiving user data may be large, and control signals may not be transmitted / received. In the above conventional method, such a case is prevented from occurring by separating the communication signal into a user data signal and a control signal.
JP 2000-324553 A

  However, there is actually a control signal that must be transmitted / received via a communication channel, and a control signal that cannot be transmitted / received due to the amount of communication may occur. That is, in data communication or the like, a control signal (for example, a PPP session for confirming the state of a PPP session) is also used in an upper layer not involving a communication device (for example, in a mobile communication system, a mobile station device, a base station device, or an exchange). LCP Echo "signal and the like) are transmitted and received, but are only one of the user data signals for the communication device. For this reason, the communication apparatus transmits and receives the control signal as user data through a communication channel. Therefore, the control signal may be affected by the amount of communication using the communication channel and may not be transmitted or received.

  The present invention has been made in view of such circumstances, and one of its purposes is a communication system, a communication apparatus, and a communication channel use control method capable of improving the communication completion rate of a control signal included in a user data signal. Is to provide.

  In a communication system according to the present invention for solving the above-described problem, at least one first communication device and a plurality of second communication devices transmit and receive communication signals via at least one communication channel among a plurality of communication channels. In the communication system, the first communication device includes an active user determination unit that determines whether or not each second communication device is an active user, and the second communication device that is determined to be an active user. On the other hand, control signal transmission means for transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels is restricted, and the second communication device includes A control signal receiving means for receiving the transmitted communication channel use restriction signal, a communication signal obtaining means for obtaining the communication signal, A communication signal for restricting transmission of the communication signal in the at least one communication channel, which is indicated to be restricted by the communication channel use restriction signal when the communication channel use restriction signal is received by the control signal receiving means. And a transmission restriction unit.

  In this way, in the communication channel indicated to be restricted, a signal from the second communication device that is an active user (a communication device that transmits / receives a signal of a predetermined amount or more within a predetermined time) Since the transmission and reception of non-active users (communication devices that transmit and receive signals that are not zero but not more than a predetermined amount within a predetermined time), the amount of active users is large. It is possible to improve the communication completion rate of the control signal included in the user data signal of the non-active user.

  In the communication system, the active user determination unit includes a reception unit that receives a signal transmitted by the second communication apparatus, and a signal amount measurement unit that measures the amount of the received signal. The second communication device in which the amount of the signal is equal to or greater than a predetermined amount may be determined as an active user. In this way, it is possible to determine whether or not the user is an active user based on the amount of signals transmitted.

  Further, in the communication system, the first communication device is a second communication device number acquisition unit that is in communication to acquire the number of the second communication devices that are determined to be active users, and the acquired second communication. And an upper limit determining means for determining whether or not the number of devices exceeds a predetermined upper limit value, wherein the control signal transmitting means is configured such that the acquired number of second communication devices exceeds the predetermined upper limit value. If it is determined that the communication channel is used, the communication channel use restriction signal may be transmitted. In this way, it can be determined whether or not to limit according to the number of active users.

  In the communication system, the first communication device further includes lower limit determination means for determining whether or not the number of the acquired second communication devices is below a predetermined lower limit value, and the control signal transmission means At least one of the communication channels indicated to be limited by the communication channel use restriction signal when it is determined that the number of acquired second communication devices is below the predetermined lower limit value. It is also possible to transmit a communication channel use restriction release signal indicating that restriction on transmission / reception of communication signals in one communication channel is released. In this way, it is possible to determine whether or not to release the restriction on the restricted communication channel according to the number of active users.

  Further, in the communication system, the control signal transmission means may be configured such that, when transmission / reception of communication signals in the communication channel is not restricted, the number of second communication devices to be acquired exceeds the predetermined upper limit value. When the determination is made, when the communication channel use restriction signal is transmitted and transmission / reception of the communication signal in the communication channel is restricted, the number of the acquired second communication devices falls below the predetermined lower limit value. If it is determined that the communication channel use restriction is released, the communication channel use restriction release signal may be transmitted. In this way, it is possible to determine whether to transmit a communication channel use restriction signal or a communication channel use restriction release signal depending on whether or not communication signal transmission / reception in the communication channel is restricted. it can.

  In the communication system, the first communication device is a second communication device number acquisition unit that acquires the number of the second communication devices that are determined to be active users, and the acquired second communication device. Further comprising lower limit determining means for determining whether or not the number is below a predetermined lower limit value, wherein the control signal transmitting means determines that the number of the acquired second communication devices is lower than the predetermined lower limit value. A communication channel use restriction release signal indicating that restriction on transmission / reception of communication signals in at least one communication channel of the communication channels indicated to be restricted by the communication channel use restriction signal is released. It is good also as sending. In this way, it is possible to determine whether or not to release the restriction on the restricted communication channel according to the number of active users.

  The communication apparatus according to the present invention transmits and receives communication signals to / from a plurality of opposed communication apparatuses via any one communication channel or a plurality of communication channels for each opposed communication apparatus. In the communication device, an active user determining means for determining whether each of the second communication devices is an active user, and for the second communication device determined to be an active user, at least one of the communication channels. Control signal transmission means for transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in one communication channel is restricted.

  Further, a communication device according to another aspect of the present invention is a communication device that transmits and receives a communication signal via an opposing communication device and any one communication channel or a plurality of communication channels among a plurality of communication channels. Active user determination means for determining whether or not the communication device is an active user, and transmission and reception of communication signals in at least one of the communication channels transmitted from the opposite communication device are restricted. A control signal receiving means for receiving a communication channel use restriction signal indicating communication signal, a communication signal obtaining means for obtaining a communication signal, and a communication channel use restriction signal when the control signal receiving means receives the communication channel use restriction signal. The communication in the at least one communication channel indicated to be restricted by a signal Characterized in that it comprises a communication signal transmission limit means for limiting the transmission of No..

  In the communication channel usage control method according to the present invention, in the first communication device, an active user determination step for determining whether or not each of the second communication devices is an active user and an active user are determined. A control signal transmission step of transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels is restricted to the second communication device, In the second communication device, the control signal receiving step for receiving the transmitted communication channel use restriction signal, the communication signal obtaining step for obtaining the communication signal, and the communication channel use restriction signal are received by the control signal receiving means. The communication channel use restriction signal indicates that the communication channel use restriction signal is restricted. Including a communication signal transmission limit step of limiting the transmission of the communication signal in Kutomo one communication channel, and wherein the.

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

  The mobile communication system 10 according to the present embodiment is configured to include a plurality of mobile station apparatuses 20, at least one base station apparatus 30, and a mobile communication network 40, as shown in FIG. The mobile station device 20 is connected to the terminal device 50, the mobile communication network 40 is connected to the communication network 41, and the communication network 41 is connected to the terminal device 50, respectively. Of the terminal devices 50, the terminal devices 50-1 to 50-n are connected to the mobile station devices 20-1 to 20-n, respectively, and the terminal device 50-0 is a base station via the communication network 41 and the mobile communication network 40. The device 30 is connected.

  As illustrated in FIG. 2, the mobile station device 20 includes a control unit 21, a storage unit 22, a wireless communication unit 23, and a terminal connection unit 24. The control unit 21 controls each unit of the mobile station device 20 and executes processing related to a call and data communication. 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, and also stores a program according to the present invention. The wireless communication unit 23 includes an antenna and a detector, modulates a voice signal, a communication packet, and the like according to an instruction input from the control unit 21 and outputs the modulated signal or the voice signal or communication arriving at the antenna. For example, a received packet is demodulated and output to the control unit 21. The terminal connection unit 24 is connected to the terminal device 50 and outputs various data to the terminal device 50 in accordance with an instruction input from the control unit 21 and outputs various data input from the terminal device 50 to the control unit 21. Process. When packet communication is performed, the terminal connection unit 24 terminates LAPB (Link Access Procedure, Balanced) that operates in the data link layer of the OSI reference model, and also operates in the data link layer of the OSI reference model. However, in the protocol stack, PPP (Point to Point Protocol) positioned above the LAPB and layers higher than the network layer are processed as user data.

  As illustrated in FIG. 3, the base station device 30 includes a control unit 31, a storage unit 32, a wireless communication unit 33, and a network interface unit 34. The control unit 31 controls each unit of the base station device 30 and executes processing related to a call and data communication. The storage unit 32 operates as a work memory for the control unit 31. The storage unit 32 holds programs and parameters related to various processes performed by the control unit 31, and also stores a program according to the present invention. The wireless communication unit 33 includes an antenna and a detection device, and each receives and demodulates a voice signal, a communication packet, and the like from at least one mobile station device 20, and outputs to the control unit 31 or input from the control unit 31. In accordance with the instruction, processing such as modulating an audio signal or a communication packet input from the control unit 31 and outputting it via an antenna is performed. The network interface unit 34 is connected to the mobile communication network 40 and receives an audio signal, a communication packet, etc. from the mobile communication network 40 and outputs it to the control unit 31, or in accordance with an instruction from the control unit 31. Signals and communication packets are transmitted to the mobile communication network 40.

  The mobile communication network 40 includes an exchange, a router or a server (not shown) used in the mobile communication system 10. The base station apparatus 30 is normally connected to an exchange, reaches a gateway exchange or a gateway server via an exchange or a router network in the mobile communication network 40, is converted into a protocol as necessary, and is connected to the communication network 41.

  As the communication network 41, for example, a TCP / IP network such as the Internet or a direct exchange network is used.

  As shown in FIG. 4, the terminal device 50 includes a control unit 51, a storage unit 52, and a communication unit 53. For the terminal device 50, for example, a computer such as a mobile phone, a personal computer, a workstation, or a mainframe is preferably used. The control unit 51 controls each unit of the terminal device 50 and executes processes related to data communication and various information processing. Further, the result of processing is displayed on a display means (not shown), or an input from an input means (not shown) is accepted and processing corresponding to the input is performed. The storage unit 52 operates as a work memory for the control unit 51. The storage unit 52 holds programs and parameters related to various processes performed by the control unit 51, and also stores a program according to the present invention. The communication unit 53 is connected to the terminal connection unit 24 of the mobile station device 20 or connected to the communication network 41, and outputs various data input from the connection destination to the control unit 51 or input from the control unit 51. In accordance with the instruction, processing such as outputting various data to the connection destination is performed. In the present embodiment, the terminal device 50-0 connected to the communication network 41 and the terminal devices 50-1 to 50-n connected to the mobile station devices 20-1 to 20-n respectively perform data communication. The terminal device 50-0 that is the communication destination of the terminal devices 50-1 to 50-n is described as one device here, but may be a different device.

  In data communication, a PPP session is established between the terminal device 50-0 and the terminal devices 50-1 to 50-n to perform communication, and each communication unit 53 terminates PPP. That is, the PPP data is processed as user data in the mobile station device 20, the base station device 30, the mobile communication network 40, and the communication network 41, and the terminal device 50 terminates the PPP. Note that PPP termination may be performed, for example, in the mobile communication network 40. In such a case, an apparatus for terminating PPP existing in the mobile communication network 40 is the terminal device 50 in the present embodiment. It is preferable that it is −0. That is, the terminal device 50 is a device for terminating PPP.

  As described above, the communication performed between the terminal device 50-0 and the terminal devices 50-1 to 50-n is terminated at the terminal device 50 in the PPP and network layers, and the mobile station device 20 And in the base station apparatus 30, it processes as user data.

  Further, the mobile station apparatus 20 and the base station apparatus 30 perform packet communication using at least one control channel and a plurality of communication channels. The control channel and the communication channel are names given according to the applications assigned to the multiplexed channels, and are physically multiplexed according to a multiplexing scheme such as frequency multiplexing, time division multiplexing, code division multiplexing. Channel. Control signals necessary for mobile communication control are communicated using a control channel, and user data signals that are user data are communicated using at least one communication channel. Since the PPP is processed as user data, transmission / reception is performed using a communication channel. Further, in order to allocate a wide band for one communication (communication performed by one mobile station apparatus 20), the plurality of communication channels are used simultaneously for the one communication. For this reason, a plurality of communications are performed while sharing a plurality of communication channels.

  FIG. 5 schematically shows how a plurality of communications are performed while sharing a plurality of communication channels. As shown in FIG. 5, the plurality of mobile station apparatuses 20 transmit signals related to communication while selecting one communication channel 60 among the plurality of communication channels 60 for each packet which is a transmission unit. However, since there is a limit to the amount of data of signals that can be transmitted and received in the communication channel 60, a signal with a data amount exceeding the limit cannot be transmitted. In the same figure, transmission of data transmitted from the mobile station apparatuses 20-8 and 9 has failed.

  Here, in the data communication performed between the terminal device 50-0 and the terminal devices 50-1 to 50-n as described above, data communication is performed by establishing a PPP session. Even when there is no data to be transmitted in, it is necessary to periodically transmit / receive an upper layer control signal for session maintenance such as “LCP Echo”. The upper layer refers to a layer above the layer terminated at the mobile station device 20 and the base station device 30. When the upper layer control signal for maintaining the session is not transmitted / received at a predetermined timing, the PPP session is disconnected. For this reason, when the upper layer control signal for maintaining the session fails to be transmitted as described above, the PPP session is disconnected. Therefore, in the present embodiment, the PPP session is prevented from being disconnected due to the amount of data transmitted and received in the communication channel 60.

  Specifically, the base station device 30 divides the plurality of mobile station devices 20 into active users and inactive users, and restricts transmission / reception of signals for some of the communication channels 60 for the active users. FIG. 6 is a schematic diagram of this process. In the figure, mobile station apparatuses 20-1 to 20-6 are active users, and mobile station apparatuses 20-7 to 9 are non-active users. The active channel and the non-active user transmit / receive the communication channels 60-1 to 60-3, and only the non-active user transmits / receives the communication channel 60-4. That is, for the active user, signal transmission / reception is restricted so that signal transmission / reception cannot be performed on the communication channel 60-4.

  Note that the active user and the non-active user are determined by the base station device 30 measuring the signal amount of the signal transmitted from each mobile station device 20. That is, if the signal amount is larger than the predetermined amount, it is determined that the user is an active user, and if the signal amount is small, it is determined that the user is a non-active user. More specifically, when a predetermined amount of signal or more is not transmitted for a predetermined time (for example, 30 seconds) or more, it may be determined that the user is an inactive user.

  Note that transmission and reception of user data other than the upper layer control signal may be restricted for a part of the communication channel 60. In this case, for the restricted communication channel, transmission / reception of only the upper layer control signal is permitted. This case will be described with reference to FIG. 6. Transmission / reception of user data other than upper layer control signals is not restricted for communication channels 60-1 to 60-3, and users other than upper layer control signals are used for communication channel 60-4. Data transmission / reception is restricted. For this reason, if the mobile station apparatuses 20-1 to 20-6 transmit data other than the upper layer control signal and the mobile station apparatuses 20-7 to 9 transmit the upper layer control signal, the mobile station apparatus 20 Data transmitted from −7 to 9 is transmitted using the communication channels 60-1 to 60-4, but data transmitted from the mobile station apparatuses 20-1 to 20-6 is transmitted using the communication channels 60-1 to 60-3. Will be.

  A communication channel use control process for realizing the above operation will be described below.

  FIG. 7 is a functional block diagram showing functional blocks related to communication channel use control processing in the mobile station apparatus 20 and the base station apparatus 30. As shown in the figure, the mobile station device 20 functionally includes a transmission channel selection unit 70, a plurality of modulation / demodulation units 72, a plurality of transmission / reception units 74 corresponding to each modulation / demodulation unit 72, a synthesis unit 76, and a restriction instruction acquisition unit. The base station apparatus 30 is functionally configured to include a transmission channel selection unit 80, a plurality of modulation / demodulation units 82, a plurality of transmission / reception units 84 corresponding to each modulation / demodulation unit 82, a combination unit 86, and an active user number determination. A part 88 is included.

  First, processing when a signal is transmitted from the mobile station device 20 to the base station device 30 will be described. In the mobile station apparatus 20, a communication signal such as a user data signal or a control signal is input to the transmission channel selection unit 70. The transmission channel selection unit 70 performs processing for assigning each communication signal to a predetermined communication channel. Specifically, for example, a control signal is assigned to a channel used as a control channel among a plurality of channels, and a user data signal is assigned to one of channels used as a communication channel. Then, the signal is input to a modem unit 72 provided corresponding to each assigned channel. In the modem unit 72, a modulation signal obtained by performing processing for encoding and modulating the input signal is input to the transmission / reception unit 74, and the transmission / reception unit 74 transmits the modulation signal to the radio section. And the transmission / reception part 84 receives the signal sent to the radio area. The transmission / reception unit 84 is also assigned to each channel, and the transmission / reception unit 84 corresponding to the channel including the signal transmitted by the transmission / reception unit 74 receives the signal. Then, the signal is output to the modulation / demodulation unit 82, demodulated / decoded, and output to the synthesis unit 86. When a communication signal related to one communication is divided and transmitted to each communication channel, the combining unit 86 performs a process of assembling the signals of each communication channel in order and outputting them to a processing unit (not shown) in the subsequent stage. Do.

  Then, the active user number determination unit 88 included in the base station device 30 periodically determines the number of mobile station devices 20 (active users) that are transmitting and receiving a predetermined amount of signals to and from the base station device 30 (the number of active users). Or when some event occurs, and determines whether to limit transmission / reception of signals other than the upper layer control signal in a part of the communication channel according to the number. More specifically, if the number exceeds a predetermined upper limit value, it is determined that transmission / reception of signals other than the upper layer control signal is restricted. And when restricting, the mobile station apparatus which is an active user by inputting the control signal (communication channel use restriction signal) including the information for identifying the communication channel to be restricted to the transmission channel selection unit 80 20 is transmitted. That is, it is determined whether or not each mobile station apparatus 20 is an active user, and a communication channel use restriction signal is transmitted to the mobile station apparatus 20 that is determined to be an active user.

  In addition, about the mobile station apparatus 20 which became a new active user after the said transmission, it is good also as transmitting a communication channel use restriction signal whenever it detects having become an active user. That is, whether or not the mobile station device 20 is an active user may be monitored by the base station device 30 and a communication channel use restriction signal may be transmitted to the mobile station device 20 that has become an active user.

  In addition, while the base station device 30 transmits a control signal to all mobile station devices 20 to which radio waves reach, the mobile station device 20 measures the amount of signal transmitted by itself, so that it is an active user. It may be received only when it is determined whether the user is an active user by determining whether the user is an inactive user. In this case, when the active user changes to a non-active user, the restriction indicated by the received communication channel use restriction signal may be canceled.

  In the mobile station apparatus 20 determined to be an active user in the base station apparatus 30, the restriction instruction acquisition unit 78 sends a control signal (communication channel use restriction signal) including information for identifying the restricted communication channel. Receive. Then, according to the control signal, the transmission channel selection unit 70 does not transmit / receive a signal for a communication channel indicated to be a communication channel restricted by the control signal. Of the user data signals, only a signal that is determined to be a restricted communication channel use permitted signal to be described later may be transmitted on the restricted communication channel. For other communication channels, user data signals are transmitted and received without limitation.

  The restricted communication channel use permitted signal is a signal that is permitted to be transmitted / received on a restricted communication channel. Specifically, the type of user data signal to which the restricted communication channel use permitted signal that is permitted to be transmitted / received on the restricted communication channel among the user data signals refers to the user data signal. It may be stored in the storage unit 22 in association with the type, or may be stored in the storage unit 32 in association with the type of user data signal (for example, an upper layer control signal). When stored in the storage unit 32, transmission / reception is performed on the communication channel restricted in the mobile station apparatus 20 by transmitting it included in the control signal including information for identifying the restricted communication channel. It is also possible to obtain what kind of user data signal the restricted communication channel use permitted signal to which is permitted.

  Then, the number of active users determination unit 88 acquires the number of active users again, and determines whether to cancel the restriction on transmission / reception of signals other than the upper layer control signal in a part of the communication channel according to the number. . More specifically, if the number exceeds a predetermined lower limit value, it is determined that the restriction on transmission / reception of signals other than the upper layer control signal is released. When canceling, a control signal (communication channel use restriction canceling signal) including information for identifying the communication channel to be cancelled is input to the transmission channel selection unit 80, so that the mobile station that is the active user Transmit to device 20. Alternatively, information for identifying the mobile station apparatus 20 that has transmitted the communication channel use restriction signal is retained, and the mobile station apparatus 20 that has transmitted the communication channel use restriction signal is transmitted to the mobile station apparatus 20 based on the retained identification information. A communication channel use restriction release signal may be transmitted.

  In the mobile station device 20, the restriction instruction acquisition unit 78 receives a control signal including information for identifying the communication channel to be released. Then, according to the control signal, the transmission channel selection unit 70 transmits / receives a signal without limiting the communication channel indicated to be a communication channel released by the control signal.

  Of the above processing, the processing in the base station apparatus 30 will be described with reference to the processing flowchart shown in FIG.

  First, the control unit 31 waits until an event such as a user stream connection / disconnection event occurs (S100). User stream connect / disconnect events are directly related to the increase or decrease in the number of active users. Therefore, when this event occurs, the number of active users is measured (S102). Then, it is determined whether or not the resource is currently limited (S104). That is, whether or not a control signal including information for identifying a communication channel to be restricted is transmitted, and then a control signal including information for identifying a communication channel to be released is transmitted for the communication channel. Are stored in the storage unit 22, and when there is a restricted communication channel, it is determined that the resource is being restricted.

  If it is determined that the resource is being limited, it is determined whether the number of active users is smaller than a predetermined lower limit m (S106). If it is determined that the number is small, a resource restriction release process, that is, a process of transmitting a control signal including information for identifying a communication channel to be released to an active user is performed for at least one restricted communication channel. (S108).

  On the other hand, if it is determined that the resource is not limited, it is determined whether or not the number of active users is greater than a predetermined upper limit value n (S110). If it is determined that the communication channel is large, the resource limitation execution process, that is, to determine to limit at least one communication channel, and to identify the communication channel to be restricted to the active user for the determined communication channel The process which transmits the control signal containing this information is performed (S112).

  In this case, m and n may be equal, or a predetermined hysteresis (difference) may be provided between m and n.

  As described above, in mobile communication system 10 according to the present embodiment, transmission / reception of signals by active users in a part of the communication channel can be restricted according to the number of active users. For this reason, a non-active user can transmit and receive an upper layer control signal without being influenced by communication by an active user.

  In addition, transmission / reception of user data signals is restricted, and in the restricted communication channel, a user data signal is transmitted after distinguishing a signal that can be transmitted according to the content of the user data signal and a signal that cannot be transmitted. Can do. For this reason, the control signal included in the user data signal, that is, the upper layer control signal can be transmitted / received through the dedicated communication channel, thereby improving the communication completion rate of the upper layer control signal and performing communication. Since it is possible to determine whether or not to provide a dedicated communication channel according to the channel congestion situation, it is possible to secure a communication band for user data signals other than the upper layer control signal.

  The present invention is not limited to the above embodiment. For example, instead of determining whether to limit by increasing or decreasing the number of active users, the determination may be made according to the data amount of signals transmitted and received on the communication channel. That is, if there is a large amount of signal data transmitted / received on the communication channel, the active user's signal transmission / reception is restricted for at least one communication channel, and if the signal data amount transmitted / received on the communication channel is small, It is good also as not restrict | limiting transmission / reception of a signal.

1 is a system configuration diagram of a mobile communication system according to the present embodiment and an apparatus connected to the mobile communication system. It is a block diagram of the mobile station apparatus which concerns on this Embodiment. It is a block diagram of the base station apparatus which concerns on this Embodiment. It is a block diagram of the terminal device which concerns on this Embodiment. It is explanatory drawing of the communication channel usage method which concerns on this Embodiment. It is explanatory drawing of the communication channel usage method which concerns on this Embodiment. It is a functional block diagram of the mobile station apparatus and base station apparatus which concern on this Embodiment. It is a processing flow figure concerning this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Mobile communication system, 20 Mobile station apparatus, 21, 31, 51 Control part, 22, 32, 52 Storage part, 23, 33 Wireless communication part, 24 Terminal connection part, 30 Base station apparatus, 34 Network interface part, 40 Mobile communication network, 41 communication network, 50 terminal device, 53 communication unit, 60 communication channel, 70, 80 transmission channel selection unit, 72, 82 modulation / demodulation unit, 74, 84 transmission / reception unit, 76, 86 combining unit, 78 restriction instruction Acquisition unit, 88 Active user number determination unit.

Claims (9)

In a communication system in which at least one first communication device and a plurality of second communication devices transmit and receive communication signals via at least one communication channel among a plurality of communication channels.
The first communication device is
Active user determining means for determining whether each of the second communication devices is an active user;
Control signal transmission for transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels is restricted to the second communication apparatus determined to be an active user Means,
Including
The second communication device is
Control signal receiving means for receiving the transmitted communication channel use restriction signal;
Communication signal acquisition means for acquiring a communication signal;
A communication signal for restricting transmission of the communication signal in the at least one communication channel, which is indicated to be restricted by the communication channel use restriction signal when the communication channel use restriction signal is received by the control signal receiving means. Transmission restriction means;
including,
A communication system characterized by the above. The communication system according to claim 1,
The active user determination means includes
Receiving means for receiving a signal transmitted by the second communication device;
Signal amount measuring means for measuring the amount of the received signal;
Including
Determining that the second communication device having an amount of the signal equal to or greater than a predetermined amount is an active user;
A communication system characterized by the above. The communication system according to claim 1 or 2,
The first communication device is
Second communication device number acquisition means for acquiring the number of second communication devices determined to be active users;
Upper limit determination means for determining whether or not the number of second communication devices to be acquired exceeds a predetermined upper limit;
Further including
The control signal transmission means transmits the communication channel use restriction signal when it is determined that the number of the acquired second communication devices exceeds the predetermined upper limit value.
A communication system characterized by the above. The communication system according to claim 3,
The first communication device is
Lower limit judging means for judging whether or not the number of acquired second communication devices is below a predetermined lower limit;
Further including
The control signal transmitting means indicates that the communication channel is restricted by the communication channel use restriction signal when it is determined that the number of the acquired second communication devices is less than the predetermined lower limit value. Transmitting a communication channel use restriction release signal indicating that restriction on transmission / reception of communication signals in at least one of the communication channels is released
A communication system characterized by the above. The communication system according to claim 4,
The control signal transmission means includes
In the case where transmission / reception of communication signals in the communication channel is not restricted, the communication channel use restriction signal is transmitted when it is determined that the number of the acquired second communication devices exceeds the predetermined upper limit value. And
In the case where transmission / reception of communication signals in the communication channel is restricted, when it is determined that the number of second communication devices to be acquired is below the predetermined lower limit value, the communication channel use restriction release signal is Send,
A communication system characterized by the above. The communication system according to claim 1 or 2,
The first communication device is
Second communication device number acquisition means for acquiring the number of second communication devices determined to be active users;
Lower limit judging means for judging whether or not the number of acquired second communication devices is below a predetermined lower limit;
Further including
The control signal transmitting means indicates that the communication channel is restricted by the communication channel use restriction signal when it is determined that the number of the acquired second communication devices is less than the predetermined lower limit value. Transmitting a communication channel use restriction release signal indicating that restriction on transmission / reception of communication signals in at least one of the communication channels is released
A communication system characterized by the above. In a communication apparatus that performs transmission and reception of communication signals via any one communication channel or a plurality of communication channels for each counter communication apparatus among the plurality of counter communication apparatuses and a plurality of communication channels.
Active user determining means for determining whether each of the second communication devices is an active user;
Control signal transmission for transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels is restricted to the second communication apparatus determined to be an active user Means,
A communication device comprising: In a communication device that transmits and receives a communication signal via an opposing communication device and any one communication channel or a plurality of communication channels among a plurality of communication channels,
Active user determining means for determining whether the communication device is an active user;
Control signal receiving means for receiving a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels transmitted from the opposite communication device is restricted;
Communication signal acquisition means for acquiring a communication signal;
A communication signal for restricting transmission of the communication signal in the at least one communication channel, which is indicated to be restricted by the communication channel use restriction signal when the communication channel use restriction signal is received by the control signal receiving means. Transmission restriction means;
A communication device comprising: In a communication channel usage control method in which at least one first communication device and a plurality of second communication devices transmit and receive communication signals via any one communication channel or a plurality of communication channels among a plurality of communication channels.
In the first communication device,
An active user determination step of determining whether each of the second communication devices is an active user;
Control signal transmission for transmitting a communication channel use restriction signal indicating that transmission / reception of communication signals in at least one of the communication channels is restricted to the second communication apparatus determined to be an active user Steps,
Including
In the second communication device,
A control signal receiving step of receiving the transmitted communication channel use restriction signal;
A communication signal acquisition step of acquiring a communication signal;
A communication signal for restricting transmission of the communication signal in the at least one communication channel, which is indicated to be restricted by the communication channel use restriction signal when the communication channel use restriction signal is received by the control signal receiving means. A transmission limit step;
including,
And a communication channel usage control method.

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