JP6508495B2 - Communication system and program - Google Patents

Description

  The present invention relates to a communication system and program.

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

3GPP TS 23.401 "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access" 3GPP TS 23.203 “Policy and Charging Control Architecture”

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

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

(1) In order to solve the above problems, a communication system according to an aspect of the present invention includes: a congestion control device; and a base station device connected with a terminal device that establishes a bearer with the congestion control device and communicates. The congestion control apparatus is information on congestion of communication by the terminal apparatus transmitted from the base station apparatus, the information indicating whether communication of the terminal apparatus is congested or not. The base station apparatus is established with the base station apparatus by performing virtual terminal processing based on virtual terminal identification information, different from the first bearer established by the terminal apparatus . an acquisition unit that acquires through the second bearer for the communication of congestion indicated by the congestion control information acquired in the acquisition unit, the control rule information indicating communication control policy It comprises a congestion control unit for executing congestion control based on the.

(2) In order to solve the above problems, a communication system 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. The congestion control apparatus is information on congestion of communication by the terminal apparatus transmitted from the base station apparatus, the information indicating whether communication of the terminal apparatus is congested or not. The base station apparatus is established with the base station apparatus by performing virtual terminal processing based on virtual terminal identification information, different from the first bearer established by the terminal apparatus . a first obtaining unit for obtaining via the second bearer, from the server device, a second obtaining unit for obtaining control rule information indicating communication control policy in accordance with the state of the congestion, the first acquisition unit odor The communication congestion indicated by the acquired congestion control information is generated, and a congestion control unit, for executing congestion control based on the control rule information acquired in the second acquisition unit.

(3) In order to solve the above problems, 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, the computer of the congestion control device is information on congestion of communication by the terminal device transmitted from the base station device, and information indicating whether communication of the terminal device is congested or not congestion control information including said different from the first bearer established by the terminal device, first the base station apparatus is established between the base station apparatus by performing a virtual terminal processing based on the virtual terminal identification information acquisition procedure to get through 2 bearer to the communication of congestion indicated by the congestion control information acquired in said acquisition procedure, shows the communication control policy Congestion control procedure to perform congestion control based on the control rule information, thereby executing.

(4) In order to solve the above problems, in a communication system comprising: a congestion control device; and a base station device connected with a terminal device that establishes communication with the congestion control device and a bearer, the computer of the congestion control device The terminal apparatus is congestion control information including information indicating congestion of communication by the terminal apparatus transmitted from the base station apparatus and indicating whether communication of the terminal apparatus is congested or not . The first acquisition obtained via the second bearer established between the base station apparatus and the base station apparatus by performing virtual terminal processing based on virtual terminal identification information, different from the established first bearer. procedure, from the server device, the second acquisition step for acquiring control rule information indicating communication control policy in accordance with the state of congestion, the congestion control information acquired in the first acquisition step The communication of congestion indicated by the congestion control procedure for performing a congestion control based on the control rule information acquired in said second acquisition step, is executed.

  According to the present invention, congestion can be reduced.

It is a block diagram showing an example of the device composition of the communication system concerning one embodiment of the present invention. It is a block diagram showing an example of the rough functional composition of the communication system concerning one embodiment of the present invention. It is a sequence diagram which shows an example of the flow of congestion control processing 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 the 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 showing an example of an apparatus 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 packet data network (PDN) 4 that is an external network.

The radio access unit S 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, and is, for example, a mobile phone, a smart phone, a personal handy-phone system (PHS), a personal digital assistant (PDA), a personal computer, a tablet, or the like. The UE 1 establishes a bearer with the PGW 2 and performs communication.
The eNB 5 is a base station apparatus to which the UE 1 connects.
The MME 6 includes an interface for communicating with the UE 1 present in the wireless zone of the LTE access system, and manages mobility of the UE 1, authentication of the UE 1, and setting control of the IP (Internet Protocol) transmission path of the UE 1.

The HSS 7 has a function of accumulating user information of the UE 1. The user information accumulated by the HSS 7 is used, for example, for authentication of the UE 1 by the MME 6 and the like.
The SGW 8 performs transmission control of the IP packet based on the setting by the MME 6. The SGW 8 transmits an IP packet to the UE 1 via communication with the eNB 5.
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. Also, the PGW 2 receives a packet transmitted from the UE 1 to the PDN 4 and transmits the packet to the PDN 4. The PGW 2 is a congestion control device that controls congestion generated by the communication of the UE 1. In the present embodiment, the PGW 2 controls congestion by, for example, limiting the flow rate of communication of the UE 1 or relaxing the limitation. The PCEF (Policy Charging Enforcement 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 apparatus that stores communication control policies such as QoS (Quality of Service) based on user information such as subscriber information and charging information of the user of the UE 1 and information on charging control.

  In the present embodiment, the UE 1 and the eNB 5 perform wireless communication. In addition, wired communication or wireless communication is performed on each other communication path. Further, 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 showing an example of a schematic functional configuration of the communication system.
In this figure, PDN 4, MME 6 and HSS 7 are omitted. A communication system S1 shown in this figure includes a plurality of UE1 and eNB5 respectively. A plurality of eNBs 51, 52,... Are each an eNB 5, and the configuration provided in the eNB 51 will be described below as an example of the eNB 5. A plurality of 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. Hereinafter, a plurality of UEs 121, 122,. The plurality of UEs 111, 112, ..., 121, 122, ... are each UE1.

  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. Further, the eNB 51 includes a central processing unit (CPU) 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), a RAM (Random Access Memory), etc. , And stores various programs to be executed by the CPU of the eNB 51, results of processing executed by the CPU, and the like. The resource monitoring unit 513, the virtual terminal processing unit 514, and the bearer switch unit 515 function, for example, when the CPU of the eNB 51 executes a program stored in the storage unit 511.

The storage unit 511 further 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 of the UEs 11 connected to the eNB 51, and is, for example, an IP address. Further, 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 that identifies the own apparatus.
The threshold information includes information indicating a congestion threshold used to determine the detection of congestion by the resource monitoring unit 513 and information indicating a non-congestion threshold used to determine the elimination of congestion.

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 of the UEs 11 and calculates a band use rate indicating the use rate of the frequency band by the UEs 11. Here, the band use rate is an example of information indicating the degree of congestion. If the calculated band use 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 band use rate is smaller than the non-congestion threshold, the resource monitoring unit 513 determines that congestion cancellation has been detected, and outputs a non-congestion notification to the virtual terminal processing unit 514.

  The virtual terminal processing unit 514 treats itself as the virtual UE 1 and performs virtual terminal processing of 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 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. After establishing the bearer, 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 band use 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 acquiring the congestion notification from the resource monitoring unit 513, the virtual terminal processing unit 514 transmits congestion control information indicating that the congestion determination flag indicates the occurrence of congestion to the PGW 2 via the bearer. Also, when the non-congestion notification is acquired from the resource monitoring unit 513, the virtual terminal processing unit 514 transmits congestion control information indicating that the congestion determination flag is the cancellation of congestion to the PGW 2 via the bearer.
The bearer switch unit 515 controls communication by switching between the bearer established by each of the UEs 11 and the 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 also 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 such as firmware and application programs to be executed by the CPU of the PGW 2 and results of processing executed by the CPU. Do.
The congestion control unit 23 functions, for example, by the CPU of the PGW 2 executing a program stored in the storage unit 21.

The storage unit 21 further 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 of the UEs 1 connected to the eNBs 51, 52,. Further, 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 restricts the communication flow rate of UE 1 indicated by the terminal identification information included in the congestion control information. Furthermore, when the congestion determination flag included in the congestion control information acquired from the eNBs 51, 52, ... includes information indicating cancellation of congestion, the congestion control unit 23 determines the flow rate of communication of UE1 indicated by the terminal identification information included in the congestion control information. Release the restriction.

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

FIG. 3 is a sequence diagram showing an example of the flow of congestion control processing by the communication system S1.
First, UE1 establishes a bearer for communication with PGW2 (Step S101). Next, UE1 starts communication with the server on PDN 4 (step S102). Next, the eNB 5 detects the occurrence of congestion (step S103). For example, the eNB 5 calculates the band use rate, and determines that the occurrence of congestion is detected when the calculated band use rate is larger than the congestion threshold. Next, eNB5 establishes a bearer between PGW2 by virtual terminal processing (Step S104). Next, eNB5 transmits congestion control information in which a congestion determination flag shows detection of congestion to PGW2 (Step S105).

  Next, PGW 2 acquires control rule information from PCRF 3 (step S 106). Next, the PGW 2 carries out traffic control based on the congestion control information acquired from the eNB 5 and the control rule information acquired from the PCRF 3 (step S 107). Next, when the eNB 5 detects that the congestion has been eliminated, the eNB 5 transmits congestion control information including information indicating the elimination of congestion to the PGW 2 (Step S108). Then, the eNB 5 cancels the bearer established with the PGW 2 by, for example, virtual terminal processing. In addition, eNB5 may keep maintaining the bearer established between PGW2 by virtual terminal processing, for example.

FIG. 4 is a flowchart showing an example of the flow of processing by the eNB 5.
After starting the system, the eNB 5 periodically performs the processes of steps S201 to S208 shown below, for example, at predetermined time intervals. First, the eNB 5 calculates the band use rate of the UE 1 connected to the own apparatus (step S201). Next, the eNB 5 determines whether the calculated band use rate is larger than the congestion threshold (step S202). If the band use rate is greater than the congestion threshold (step S202; YES), it is determined whether or not a bearer has been established by virtual terminal processing (step S203). When a bearer has not been established by virtual terminal processing (step S203; NO), the eNB 5 establishes a bearer by virtual terminal processing (step S204), and transmits congestion control information indicating that congestion has occurred in the congestion determination flag to PGW 2 (Step S205). Then, the eNB 5 ends the process. Moreover, when the bearer has been established by the virtual terminal process (step S203; YES), the eNB 5 executes the process of step S205.

  When the band use rate is equal to or less than the congestion threshold (step S202; NO), the eNB 5 determines whether the band use rate is larger than the non-congestion threshold (step S206). If the bandwidth usage rate is greater than the non-congestion threshold (step S206; YES), the traffic is properly controlled if congestion control is in progress. Also, if congestion control is not underway, there is no need for congestion control. Therefore, the eNB 5 ends the process. In addition, when the band use rate is equal to or less than the non-congestion threshold (step S206; NO), the eNB 5 determines whether there is a UE 1 that is receiving flow restriction due to congestion control among the UEs 1 connected to the own device. (Step S207). If there is no UE 1 that is subject to flow restriction (step S207; NO), the eNB 5 ends the process. Also, when there is a UE 1 that has received flow restriction (step S207; YES), the eNB 5 transmits congestion control information indicating that the congestion determination flag is the cancellation of congestion to the PGW 2 (step S208). Then, the eNB 5 ends the process.

FIG. 5 is a flowchart showing an example of the 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 the congestion determination flag included in the acquired congestion control information indicates the occurrence of congestion (step S302). If the congestion determination flag indicates the occurrence of congestion (step S302; YES), the PGW 2 limits the flow rate of the UE 1 so that the band use 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.

  Also, if the congestion determination flag does not indicate the occurrence of congestion, that is, if the cancellation of congestion is indicated (step S302; NO), the PGW 2 performs the flow restriction so that the maximum value of the band use rate becomes a predetermined target value. Alleviation or cancellation is performed (step S304). Specifically, for example, the PGW 2 can communicate with the UE 1 connected to the eNB 5 in which the congestion has been eliminated up to ((target value of bandwidth usage rate) / (current bandwidth usage rate)) at maximum. Request to ease restrictions. In addition, even if the restriction on the amount of communication is canceled, if the target value is not satisfied, the flow restriction is canceled. Then, the PGW 2 ends the process.

FIG. 6 is a diagram illustrating an example of congestion control.
In the example shown to this figure, a vertical axis | shaft shows the zone | band use rate which eNB5 calculated. The horizontal axis shows time. Also, the congestion threshold is Z [%]. A target band use rate, which is a predetermined target value of the band use rate, is Y [%]. Also, the non-congestion threshold is X [%]. The straight line graph shows an example of the temporal change of the band use rate when congestion control is performed. The broken line graph shows an example of the temporal change of the band use rate when congestion control is not performed.

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

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

  As mentioned above, according to communication system S1 which concerns on this embodiment, eNB5 establishes PGW2 and a bearer by processing UE1 virtually. Thereby, eNB5 can communicate arbitrary information with PGW2, and can transmit congestion control information required for congestion control to PGW2, for example. Then, since the PGW 2 can perform congestion control based on the communication control policy and the congestion control information, it can perform congestion control more appropriately, and can reduce congestion.

  In addition, since the communication system S1 does not need to provide an interface for communicating congestion control information between the PGW 2 and the wireless access unit S2, it can comply with the international standard. In addition, the communication system S1 can reduce the cost required for the repair of the facility. Further, since the communication system S1 does not require a hand when transmitting the communication congestion status to the PGW 2, the eNB 51 can immediately transmit the occurrence of congestion due to the communication of the UE 1 as soon as it is detected.

  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 wireless access unit S2 in which congestion is occurring is sent from the PDN 4, the PGW 2 may perform congestion control to restrict the inflow of the packet to the wireless access unit S2. . As a result, the PGW 2 can suppress the generation of packets that can not be processed in the wireless access unit S 2 and the discarding of the packets, and thus can accelerate the resolution of congestion in the wireless access unit S 2.

  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 non-congestion notification output from the resource monitoring unit 513 and the band use rate to the UE 1 connected to the own apparatus. The UE 1 that has acquired the congestion notification or the non-congestion notification communicates information via which the virtual terminal processing unit 514 described above communicates with the PGW 2 via the bearer established between the own device and the PGW 2. Then, the UE 1 may transmit the information acquired from the PGW 2 to the eNB 5, and the eNB 5 may perform processing based on the information acquired from the UE 1.

  A part of PGW 2 and eNB 5 in each embodiment described above, for example, congestion control unit 23, resource monitoring unit 513, virtual terminal processing unit 514, bearer switch unit 515, etc. may be realized by a computer. In that case, a program for realizing this function may be recorded in a computer readable recording medium, and the program recorded in the recording medium may be read and executed by a computer system. In addition, a "computer system" here is a computer system incorporated in PGW2 and eNB5, and assumes that OS (Operating System), hardwares, such as a peripheral device, are included.

  The term "computer-readable recording medium" refers to a storage medium such as a flexible disk, a magneto-optical disk, a ROM, a portable medium such as a ROM or a CD-ROM, or a hard disk built in a computer system. Furthermore, the “computer-readable recording medium” is one that holds a program dynamically for a short time, like a communication line in the case of 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 in a computer system serving as a server or a client in that case may also include one that holds a program for a certain period of time. The program may be for realizing a part of the functions described above, or may be realized in combination with the program already recorded in the computer system.

  Moreover, you may implement | achieve some 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 processor-ized separately, and may integrate and processor-ize one part or all. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. In the case where an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology, integrated circuits based on such technology may also be used.

  As mentioned above, although one embodiment of this invention was described in detail with reference to drawings, a specific structure is not restricted to the above-mentioned thing, Various design changes etc. in the range which does not deviate from the summary of this invention It is possible to

  S1 communication system, S2 wireless 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 (4)

A communication system comprising: a congestion control device; and a base station device connected with a terminal device that establishes a bearer with the congestion control device and communicates.
The congestion control device
The congestion control information including information indicating congestion of communication by the terminal device transmitted from the base station device and indicating whether communication of the terminal device is congested is established by the terminal device; An acquisition unit, different from the first bearer, acquired via the second bearer established between the base station apparatus and the base station apparatus by performing virtual terminal processing based on virtual terminal identification information ;
A congestion control unit that executes congestion control based on control rule information indicating a communication control policy for communication in which congestion indicated by congestion control information acquired by the acquisition unit is occurring;
A communication system comprising A communication system comprising: a congestion control device; and a base station device connected with a terminal device that establishes a bearer with the congestion control device and communicates.
The congestion control device
The congestion control information including information indicating congestion of communication by the terminal device transmitted from the base station device and indicating whether communication of the terminal device is congested is established by the terminal device; A first acquisition unit, different from the first bearer, acquired via the second bearer established between the base station apparatus and the base station apparatus by performing virtual terminal processing based on virtual terminal identification information ; ,
A second acquisition unit that acquires control rule information indicating a communication control policy according to the state of congestion from the server device;
A congestion control unit that executes congestion control based on the control rule information acquired by the second acquisition unit with respect to communication in which congestion is indicated by congestion control information acquired by the first acquisition unit;
A communication system comprising In a communication system comprising: a congestion control device; and a base station device connected with a terminal device that establishes a bearer with the congestion control device and communicates.
In the congestion control device computer,
The congestion control information including information indicating congestion of communication by the terminal device transmitted from the base station device and indicating whether communication of the terminal device is congested is established by the terminal device; An acquisition procedure for acquiring via the second bearer established between the base station apparatus and the base station apparatus by performing virtual terminal processing based on virtual terminal identification information, which is different from the first bearer ;
A congestion control procedure for executing congestion control based on control rule information indicating a communication control policy for a communication in which congestion is indicated by congestion control information acquired in the acquisition procedure;
A program to run a program. In a communication system comprising: a congestion control device; and a base station device connected with a terminal device that establishes a bearer with the congestion control device and communicates.
In the congestion control device computer,
The congestion control information including information indicating congestion of communication by the terminal device transmitted from the base station device and indicating whether communication of the terminal device is congested is established by the terminal device; A first acquisition procedure, different from the first bearer, acquired through the second bearer established between the base station apparatus and the base station apparatus by performing virtual terminal processing based on virtual terminal identification information ;
A second acquisition procedure for acquiring control rule information indicating a communication control policy according to the state of congestion from the server device;
A congestion control procedure for executing congestion control based on the control rule information acquired in the second acquisition procedure , for communication in which congestion is indicated by congestion control information acquired in the first acquisition procedure;
A program to run a program.

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