JP2015177363A - Communication system, congestion control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce congestion.SOLUTION: A communication system includes a congestion control device and a base station device, to which a terminal device is connected, for establishing a bearer to communicate with the congestion control device. The base station device includes: a resource monitoring unit for acquiring congestion control information which indicates information about the communication congestion of the terminal device; and a virtual terminal processing unit for establishing the bearer with the congestion control device and executing processing to be executed by the terminal device in the communication through the bearer, so as to transmit the congestion control information, acquired by the resource monitoring unit, to the congestion control device through the bearer. The congestion control device includes a congestion control unit for executing the congestion control, on the basis of the congestion control information transmitted from the base station device.

Description

  The present invention relates to a communication system, a congestion control method, and a program.

  Conventionally, a 3GPP (3rd Generation Partnership Prospect) international standard mobile network that accommodates E-UTRAN of an LTE (Long Term Evolution) network has been defined (for example, see Non-Patent Document 1). In this 3GPP network, a communication control policy that is a traffic (flow rate) control policy is managed by a PCRF (Policy and Charging Rules Function) (see, for example, Non-Patent Document 2). The traffic is controlled by PGW (Packet Data Network (PGN) -Gateway) based on a communication control policy managed by the PCRF.

3GPP TS 23.401 “General Packet Radio Service (GPRS) enhancement for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access” 3GPP TS 23.203 “Policy and charging control architecture”

  However, conventionally, there are cases where congestion cannot be reduced. For example, the 3GPP network described above does not include an interface for communicating congestion control information used for congestion control between a PGW and a wireless access unit such as E-UTRAN. Also, providing an interface for communicating congestion control information between the PGW and the wireless access unit is not desirable because it modifies the international standard. Further, when the communication congestion status in the wireless access unit is manually transmitted to the PGW, it is not always possible to immediately transmit the congestion detection to the PGW. Therefore, the PGW cannot recognize the occurrence of congestion in the wireless access unit and may not be able to reduce the congestion.

  The present invention has been made in view of the above points, and provides a communication system, a congestion control method, and a program for reducing congestion.

  (1) In order to solve the above-described problem, a communication system according to one aspect of the present invention includes a congestion control device and a base station device connected to a terminal device that establishes a bearer with the congestion control device and communicates. The base station device establishes a bearer between the resource monitoring unit that acquires information on congestion of communication by the terminal device and the congestion control device, and establishes a bearer through the bearer. A virtual terminal processing unit that performs processing performed by the terminal device in the communication performed and transmits the congestion control information acquired by the resource monitoring unit to the congestion control device via the bearer, and the congestion control device includes: And a congestion control unit that executes congestion control based on the congestion control information transmitted from the base station apparatus.

  (2) One aspect of the present invention is characterized in that, in the communication system according to (1), the congestion control information includes information indicating whether or not the communication of the terminal device is congested. To do.

  (3) One aspect of the present invention is characterized in that, in the communication system according to the above (1) or (2), the congestion control information includes identification information of the terminal device.

  (4) According to one aspect of the present invention, in the communication system according to any one of (1) to (3), the congestion control unit includes a storage unit that stores control rule information indicating a communication control policy. The control rule information is read out, and congestion control is executed based on the communication control policy indicated by the read control rule information.

  (5) In order to solve the above-described problem, a congestion control method according to an aspect of the present invention includes a congestion control device, and a base station device connected to a terminal device that establishes a bearer with the congestion control device and communicates with the congestion control device. A congestion control method in a communication system comprising: a resource monitoring process in which the base station apparatus acquires congestion control information indicating information on communication congestion by the terminal apparatus; and the base station apparatus includes the congestion control method. A virtual terminal that performs processing performed by the terminal device in establishment of a bearer with the device and communication via the bearer, and transmits the congestion control information acquired in the resource monitoring process to the congestion control device through the bearer that has been established. And a congestion control process in which the congestion control device executes congestion control based on the congestion control information transmitted from the base station device. The features.

  (6) In order to solve the above-described problem, a program according to an aspect of the present invention includes a congestion control device and a base station device to which a terminal device that establishes a bearer and communicates with the congestion control device is connected. In a communication system, a resource monitoring procedure for acquiring congestion control information indicating information about communication congestion by the terminal device to a computer of the base station device, establishment of a bearer with the congestion control device, and communication via the bearer Is a program for executing a virtual terminal processing procedure for executing processing performed by the terminal device and transmitting the congestion control information acquired in the resource monitoring procedure to the congestion control device via a bearer established.

  (7) In order to solve the above problem, a program according to an aspect of the present invention includes a congestion control device and a base station device to which a terminal device that establishes a bearer and communicates with the congestion control device is connected. In the communication system, a congestion control information indicating information on communication congestion by the terminal device transmitted from the base station device is transmitted to the computer of the congestion control device, and a bearer established with the base station device is provided. And a congestion control procedure for executing congestion control based on the congestion control information acquired in the acquisition procedure.

  According to the present invention, congestion can be reduced.

It is a block diagram which shows an example of the apparatus structure of the communication system which concerns on one Embodiment of this invention. It is a block diagram which shows an example of the schematic function structure of the communication system which concerns on one Embodiment of this invention. It is a sequence diagram which shows an example of the flow of the congestion control process by the communication system which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the flow of the process by the base station apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the flow of a process by the congestion control apparatus which concerns on one Embodiment of this invention. It is a figure which shows an example of the congestion control which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating an example of a device configuration of a communication system.
As shown in this example, the communication system S1 according to the present embodiment includes a UE 1, a radio access unit S2, a PGW 2, a PCRF 3, and a PDN (Packet Data Network) 4 that is an external network.

The radio access unit S <b> 2 includes an eNB 5, an MME (Mobility Management Entity) 6, an HSS (Home Subscriber Server) 7, and an SGW (Serving-Gateway) 8.
The UE 1 is a terminal device, such as a mobile phone, a smartphone, a PHS (Personal Handy-phone System), a PDA (Personal Digital Assistant), a personal computer, or a tablet. UE1 establishes a bearer with PGW2 and performs communication.
eNB5 is a base station apparatus to which UE1 is connected.
The MME 6 includes an interface for communicating with the UE 1 existing in the radio zone of the LTE access system, and manages the movement of the UE 1, authenticates the UE 1, and controls the setting of the IP (Internet Protocol) transmission path of the UE 1.

HSS7 is provided with the function to accumulate | store the user information of UE1. The user information stored in the HSS 7 is used for authentication of the UE 1 by the MME 6, for example.
The SGW 8 performs IP packet transmission control based on the setting by the MME 6. SGW8 transmits an IP packet to UE1 via communication with eNB5.
The PGW 2 has a connection point with the PDN 4, receives a packet transmitted from the PDN 4 to the UE 1, and transmits the packet to the UE 1. Moreover, PGW2 receives the packet transmitted from UE1 to PDN4, and transmits to PDN4. Moreover, PGW2 is a congestion control apparatus which controls the congestion which generate | occur | produces by communication of UE1. In the present embodiment, the PGW 2 controls congestion by, for example, limiting the communication flow rate of the UE 1 or relaxing the restriction. A PCEF (Policy Charging Enhancement Function), which is a congestion control function of the PGW 2, is realized based on information managed by the PCRF.
The PCRF 3 is a server device that stores communication control policy such as QoS (Quality of Service) and charging control information based on user information such as subscriber information and charging information of the user of the UE 1.

  In the present embodiment, UE1 and eNB5 perform radio communication. Further, wired communication or wireless communication is performed on each other communication path. When a certain device communicates with another device, another device existing between these devices relays or transfers the communication.

FIG. 2 is a block diagram illustrating an example of a schematic functional configuration of the communication system.
In this figure, PDN4, MME6, and HSS7 are omitted. The communication system S1 shown in this figure includes a plurality of UE1 and eNB5. Each of the plurality of eNBs 51, 52,... Is an eNB 5, and the configuration of the eNB 51 will be described below as an example of the eNB 5. A plurality of UEs 1, UEs 111, 112,... are connected to the eNB 51. Hereinafter, the plurality of UBs 111, 112,... A plurality of UEs 121, 122,... are connected to the eNB 52. In the following, the plurality of UEs 121, 122,. A plurality of UEs 111, 112,..., 121, 122,.

  The eNB 51 includes a storage unit 511, a communication unit 512, a resource monitoring unit 513, a virtual terminal processing unit 514, and a bearer switch unit 515. The eNB 51 includes a CPU (Central Processing Unit) and a storage device.

  The storage unit 511 includes, for example, an HDD (Hard Disc Drive), a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), a ROM (Read Only Memory), or a RAM (Random Memory Program). In addition, various programs to be executed by the CPU included in the eNB 51, results of processing executed by the CPU, and the like are stored. The resource monitoring unit 513, the virtual terminal processing unit 514, and the bearer switch unit 515 function, for example, when a CPU included in the eNB 51 executes a program stored in the storage unit 511.

The storage unit 511 includes an identification information storage unit 5111 that stores terminal identification information and a threshold information storage unit 5112 that stores threshold information.
The terminal identification information stored in the identification information storage unit 5111 is information for identifying each UE 11 connected to the eNB 51, and is, for example, an IP address. The identification information storage unit 5111 stores virtual terminal identification information that is terminal identification information used in virtual terminal processing executed by the eNB 51 and is terminal identification information for identifying the own apparatus.
The threshold information includes information indicating a congestion threshold used for determination of congestion detection by the resource monitoring unit 513 and information indicating a non-congestion threshold used for determination of congestion elimination.

The communication unit 512 includes a communication interface and communicates with the UE 11 and the SGW 8.
The resource monitoring unit 513 implements a resource monitoring function. The resource monitoring unit 513 monitors the traffic of each UE 11 and calculates a band usage rate indicating a frequency band usage rate by the UE 11. Here, the bandwidth usage rate is an example of information indicating the degree of congestion. If the calculated bandwidth usage rate is greater than the congestion threshold, the resource monitoring unit 513 determines that the occurrence of congestion has been detected, and outputs a congestion notification to the virtual terminal processing unit 514. If the calculated bandwidth usage rate is smaller than the non-congestion threshold, the resource monitoring unit 513 determines that congestion has been detected, and outputs a non-congestion notification to the virtual terminal processing unit 514.

  The virtual terminal processing unit 514 treats its own device as a virtual UE 1 and performs virtual terminal processing including bearer establishment processing with the PGW 2 and communication processing via the bearer. When acquiring the congestion notification from the resource monitoring unit 513, the virtual terminal processing unit 514 acquires the virtual terminal identification information from the identification information storage unit 5111, and establishes a bearer with the PGW 2 based on the acquired virtual terminal identification information. When the bearer is established, the virtual terminal processing unit 514 transmits congestion control information indicating information for congestion control to the PGW 2 via the bearer.

The congestion control information includes, for example, a congestion determination flag, terminal identification information of each UE 11 connected to the own apparatus, virtual terminal identification information of the own apparatus, and a bandwidth usage rate calculated by the resource monitoring unit 513. The congestion determination flag indicates whether the state detected by the resource monitoring unit 513 is the occurrence of congestion or the elimination of congestion. When the congestion notification is acquired from the resource monitoring unit 513, the virtual terminal processing unit 514 transmits the congestion control information whose congestion determination flag indicates the occurrence of congestion to the PGW 2 via the bearer. Further, when the non-congestion notification is acquired from the resource monitoring unit 513, the virtual terminal processing unit 514 transmits congestion control information whose congestion determination flag indicates that congestion is eliminated to the PGW 2 via the bearer.
The bearer switch unit 515 controls communication by switching between a bearer established by each UE 11 and a bearer established by the virtual terminal processing unit 514. The bearer switch unit 515 may be incorporated in the communication unit 512.

The PGW 2 includes a storage unit 21, a communication unit 22, and a congestion control unit 23. The PGW 2 includes a CPU and a storage device.
The storage unit 21 includes, for example, an HDD, a flash memory, an EEPROM, a ROM, or a RAM, and stores various programs to be executed by the CPU included in the PGW 2, such as firmware and application programs, and results of processing executed by the CPU. To do. The congestion control unit 23 functions, for example, when a CPU included in the PGW 2 executes a program stored in the storage unit 21.

The storage unit 21 includes an identification information storage unit 211 that stores terminal identification information.
The terminal identification information stored in the identification information storage unit 211 is information for identifying each UE 1 connected to each of the eNBs 51, 52,. In addition, the identification information storage unit 211 stores virtual terminal identification information of each of the eNBs 51, 52,.

The communication unit 22 includes a communication interface and communicates with the SGW 8 and the PCRF 3.
The congestion control unit 23 acquires congestion control information from the eNBs 51, 52,... Via the communication unit 22, and executes congestion control based on the acquired congestion control information and control rule information acquired from the PCRF 3. Here, the control rule information indicates a communication control policy. When the congestion determination flag included in the congestion control information acquired from the eNBs 51, 52,... indicates the occurrence of congestion, the congestion control unit 23 limits the communication flow rate of the UE 1 indicated by the terminal identification information included in the congestion control information. In addition, when the congestion determination flag included in the congestion control information acquired from the eNBs 51, 52,... Includes information indicating the elimination of congestion, the congestion control unit 23 indicates the communication flow rate of UE1 indicated by the terminal identification information included in the congestion control information. Remove the restriction.

  The PCRF 3 includes a control rule information storage unit 31 that stores control rule information. When the PCRF 3 acquires a control rule information acquisition request from the PGW 2, the PCRF 3 reads the control rule information from the control rule information storage unit 31, and transmits the read control rule information to the PGW 2.

FIG. 3 is a sequence diagram illustrating an example of the flow of congestion control processing by the communication system S1.
First, the UE 1 establishes a communication bearer with the PGW 2 (step S101). Next, UE1 starts communication with the server on PDN4 (step S102). Next, the eNB 5 detects the occurrence of congestion (step S103). For example, the eNB 5 calculates the bandwidth usage rate, and determines that the occurrence of congestion is detected when the calculated bandwidth usage rate is greater than the congestion threshold. Next, the eNB 5 establishes a bearer with the PGW 2 by the virtual terminal process (Step S104). Next, the eNB 5 transmits congestion control information whose congestion determination flag indicates that congestion is detected to the PGW 2 (step S105).

  Next, the PGW 2 acquires control rule information from the PCRF 3 (step S106). Next, the PGW 2 performs traffic control based on the congestion control information acquired from the eNB 5 and the control rule information acquired from the PCRF 3 (step S107). Next, when the eNB 5 detects the cancellation of the congestion, the eNB 5 transmits congestion control information including information indicating the cancellation of the congestion to the PGW 2 (Step S108). And eNB5 eliminates the bearer established between PGW2 by virtual terminal processing, for example. In addition, eNB5 may continue maintaining the bearer established between PGW2 by the virtual terminal process, for example.

FIG. 4 is a flowchart illustrating an example of a process flow by the eNB 5.
After starting the system, the eNB 5 periodically performs the processing of steps S201 to S208 shown below, for example, every predetermined time. First, the eNB 5 calculates the band usage rate of the UE 1 connected to the own device (step S201). Next, the eNB 5 determines whether the calculated bandwidth usage rate is greater than the congestion threshold (step S202). If the bandwidth usage rate is larger than the congestion threshold (step S202; YES), it is determined whether a bearer has been established by the virtual terminal process (step S203). When the bearer has not been established by the virtual terminal process (step S203; NO), the eNB 5 establishes the bearer by the virtual terminal process (step S204), and the congestion determination flag transmits the congestion control information indicating the occurrence of the congestion to the PGW 2. (Step S205). And eNB5 complete | finishes a process. Moreover, when the bearer has been established by virtual terminal processing (step S203; YES), eNB5 performs the process of step S205.

  When the bandwidth usage rate is equal to or lower than the congestion threshold (step S202; NO), the eNB 5 determines whether the bandwidth usage rate is larger than the non-congestion threshold (step S206). If the bandwidth usage rate is larger than the non-congestion threshold (step S206; YES), the amount of communication is correctly controlled if congestion control is being performed. Further, if congestion control is not being performed, there is no need for congestion control. Therefore, the eNB 5 ends the process. Further, when the bandwidth usage rate is equal to or less than the non-congestion threshold (step S206; NO), the eNB 5 determines whether or not there is a UE 1 that is subjected to the flow restriction by the congestion control among the UEs 1 connected to the own device. (Step S207). When there is no UE1 subjected to the flow restriction (step S207; NO), the eNB 5 ends the process. Further, when there is UE1 subjected to flow restriction (step S207; YES), the eNB 5 transmits congestion control information whose congestion determination flag indicates that congestion is eliminated to the PGW 2 (step S208). And eNB5 complete | finishes a process.

FIG. 5 is a flowchart illustrating an example of a flow of processing by the PGW 2.
First, the PGW 2 acquires congestion control information from the eNB 5 (step S301). Next, the PGW 2 determines whether or not the congestion determination flag included in the acquired congestion control information indicates the occurrence of congestion (step S302). When the congestion determination flag indicates the occurrence of congestion (step S302; YES), the PGW 2 limits the flow rate of the UE1 so that the band usage rate becomes a predetermined target value (step S303). Specifically, for example, the PGW 2 requests the UE 1 connected to the eNB 5 that has detected congestion to set the communication amount to ((target value of bandwidth usage rate) / (current bandwidth usage rate)). . Then, the PGW 2 ends the process.

  Further, when the congestion determination flag does not indicate the occurrence of congestion, that is, when the congestion determination flag indicates the elimination of the congestion (step S302; NO), the PGW 2 sets the flow rate restriction so that the maximum value of the bandwidth usage rate becomes a predetermined target value. Mitigation or cancellation is performed (step S304). Specifically, for example, the PGW 2 has a communication amount of up to ((target value of bandwidth usage rate) / (current bandwidth usage rate)) with respect to the UE 1 connected to the eNB 5 in which congestion is eliminated. Require that restrictions be relaxed. In addition, if the restriction on the communication amount is released and the target value is not reached, the restriction on the flow rate is released. Then, the PGW 2 ends the process.

FIG. 6 is a diagram illustrating an example of congestion control.
In the example shown in this figure, the vertical axis indicates the band usage rate calculated by the eNB 5. The horizontal axis indicates time. The congestion threshold is Z [%]. A target bandwidth usage rate that is a predetermined target value of the bandwidth usage rate is Y [%]. The non-congestion threshold is X [%]. Further, the straight line graph shows an example of a change over time in the bandwidth usage rate when the congestion control is performed. A broken line graph shows an example of a change in bandwidth utilization with time when the congestion control is not performed.

  In this example, when the congestion control is not performed, the bandwidth usage rate increases with time from the non-congestion threshold or less, and temporarily becomes a constant value when the congestion threshold is exceeded. As time further elapses, the bandwidth usage rate starts to decrease and finally becomes a value equal to or less than the non-congestion threshold. On the other hand, when the above-described congestion control is performed, the PGW 2 acquires congestion control information from the eNB 5 where the congestion determination flag indicates the occurrence of congestion when the congestion threshold is exceeded, and the bandwidth usage rate is the target bandwidth usage rate. Start limiting the flow so that Thereby, as shown to area | region A1, a zone | band usage rate falls to the target zone | band usage rate. Thereafter, when the bandwidth usage rate decreases and becomes equal to or less than the non-congestion threshold, the PGW 2 acquires the congestion control information indicating that the congestion determination flag indicates the elimination of the congestion from the eNB 5, and relaxes or releases the restriction on the flow rate. Thereby, as shown to area | region A2, a band usage rate increases to about target bandwidth usage rate. Then, the bandwidth usage rate continues to decrease and returns to the initial state.

  Conventionally, the 3GPP international standard does not stipulate an interface for transmitting the communication congestion status in the radio access unit accommodating E-UTRAN to the PCRF, and the communication control policy managed by the PCRF communicates in the radio access unit. There was a problem that it was not possible to reflect the congestion situation.

  As described above, according to the communication system S1 according to the present embodiment, the eNB 5 establishes a bearer with the PGW 2 by virtually performing the processing of the UE1. Thereby, eNB5 can communicate arbitrary information with PGW2, for example, can transmit congestion control information required for control of congestion to PGW2. And since PGW2 can perform congestion control based on a communication control policy and congestion control information, it can perform congestion control more appropriately and can reduce congestion.

  Further, since the communication system S1 does not need to provide an interface for communicating congestion control information between the PGW 2 and the radio access unit S2, it can comply with international standards. Further, the communication system S1 can reduce the cost required for the repair of the facilities. In addition, since the communication system S1 does not require manual operations when transmitting the communication congestion state to the PGW 2, the occurrence of congestion due to the communication of the UE1 can be immediately transmitted as soon as the eNB 51 detects it.

  Note that the PGW 2 may perform congestion control other than the control exemplified in the above-described embodiment. For example, when a packet addressed to UE1 connected to the radio access unit S2 in which congestion occurs is sent from the PDN 4, the PGW 2 may perform congestion control that restricts the flow of the packet to the radio access unit S2. . As a result, the PGW 2 can suppress the generation of packets that cannot be processed in the wireless access unit S2 and the discarding of the packets, and therefore, the congestion of the wireless access unit S2 can be promoted.

  Note that the function of the virtual terminal processing unit 514 of the eNB 5 may be realized by an external device. For example, the eNB 5 transmits the congestion notification or the non-congestion notification output from the resource monitoring unit 513 and the band usage rate to the UE 1 connected to the own device. The UE 1 that has acquired the congestion notification or the non-congestion notification communicates information that the above-described virtual terminal processing unit 514 communicates with the PGW 2 through a bearer established between the own device and the PGW 2. And the said UE1 may transmit the information acquired from PGW2 to eNB5, and eNB5 may be made to process based on the information acquired from UE1.

  In addition, you may make it implement | achieve a part of PGW2 and eNB5 in each embodiment mentioned above, for example, the congestion control part 23, the resource monitoring part 513, the virtual terminal process part 514, the bearer switch part 515, etc. with a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed. The “computer system” referred to here is a computer system built in the PGW 2 and the eNB 5 and includes hardware such as an OS (Operating System) and peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Moreover, you may implement | achieve part or all of PGW2 and eNB5 in embodiment mentioned above as integrated circuits, such as LSI (Large Scale Integration). Each function part of PGW2 and eNB5 may be individually made into a processor, and a part or all may be integrated and made into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  S1 ... communication system, S2 ... radio access unit, 1, 11, 12, 111, 112, 121, 122 ... UE, 2 ... PGW, 21 ... storage unit, 211 ... identification information storage unit, 22 ... communication unit, 23 ... Congestion control unit, 3 ... PCRF, 4 ... PDN, 5, 51, 52 ... eNB, 511 ... storage unit, 5111 ... identification information storage unit, 5112 ... threshold information storage unit, 512 ... communication unit, 513 ... resource monitoring unit, 514 ... Virtual terminal processing unit, 515 ... Bearer switch unit, 6 ... MME, 7 ... HSS, 8 ... SGW

Claims (7)

A communication system comprising a congestion control device, and a base station device to which a terminal device that establishes a bearer and communicates with the congestion control device is connected,
The base station device
A resource monitoring unit for acquiring congestion control information indicating information on communication congestion by the terminal device;
The processing performed by the terminal device in the establishment of a bearer with the congestion control device and communication via the bearer is performed, and the congestion control information acquired by the resource monitoring unit is transmitted to the congestion control device via the bearer. A virtual terminal processing unit;
With
The congestion control device includes:
A congestion control unit that performs congestion control based on the congestion control information transmitted from the base station device;
A communication system comprising: The congestion control information includes information indicating whether communication of the terminal device is congested,
The communication system according to claim 1. The congestion control information includes identification information of the terminal device.
The communication system according to claim 1 or 2, characterized by the above. The congestion control unit reads the control rule information from a storage unit that stores control rule information indicating a communication control policy, and executes congestion control based on the communication control policy indicated by the read control rule information.
The communication system according to any one of claims 1 to 3, characterized in that: A congestion control method in a communication system comprising a congestion control device and a base station device connected to a terminal device that establishes and communicates with the congestion control device with a bearer,
A resource monitoring process in which the base station device acquires congestion control information indicating information on communication congestion by the terminal device;
The base station device performs processing performed by the terminal device in establishment of a bearer with the congestion control device and communication via the bearer, and via a bearer that has established congestion control information acquired in the resource monitoring process. A virtual terminal processing process to be transmitted to the congestion control device;
A congestion control process in which the congestion control device performs congestion control based on the congestion control information transmitted from the base station device;
A congestion control method comprising: In a communication system comprising a congestion control device and a base station device to which a terminal device that establishes a bearer and communicates with the congestion control device is connected,
In the computer of the base station device,
A resource monitoring procedure for acquiring congestion control information indicating information on communication congestion by the terminal device;
The processing performed by the terminal device in the establishment of a bearer with the congestion control device and communication via the bearer is performed, and the congestion control information acquired in the resource monitoring procedure is transmitted to the congestion control device via the established bearer. Virtual terminal processing procedure,
A program for running In a communication system comprising a congestion control device and a base station device to which a terminal device that establishes a bearer and communicates with the congestion control device is connected,
In the computer of the congestion control device,
An acquisition procedure for acquiring congestion control information indicating information about communication congestion by the terminal device transmitted from the base station device via a bearer established with the base station device,
A congestion control procedure for performing congestion control based on the congestion control information acquired in the acquisition procedure;
A program for running

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