JP5797137B2 - Traffic control device, traffic control system, and traffic control method - Google Patents

Description

  The present invention relates to a traffic control device, a traffic control system, and a traffic control method, and more particularly to a traffic control device, a traffic control system, and a traffic control method that control a wireless network, a wired network, and traffic in an integrated manner.

Patent Document 1 is a document related to traffic control in a network for mobile phones. In Patent Document 1, generally, a base station measures the ratio of communication terminals with good / bad communication quality (SIR) in a cell, and when the measured value exceeds a certain threshold, the quality is degraded. Therefore, a method is disclosed in which the transmission speed of a communication terminal that performs high-speed transmission is reduced to a predetermined value to reduce the quality of the user and prevent quality degradation.
Moreover, there is Patent Document 2 as a document relating to another method of traffic control in a network for mobile phones. Patent Document 2 outlines that a wireless base station located at a wireless and wired node can monitor both wireless and wired traffic, and install a traffic control device in the base station. Discloses a method for controlling wireless and wired traffic. More specifically, in the traffic control device installed in the base station, the network traffic volume is measured periodically, and if the measured value exceeds the threshold, the transmission output level of the base station is kept constant. A method for controlling traffic volume is disclosed.

JP 2001-25068 A JP 2011-15449 A

With the spread of smartphones in recent years, the traffic volume of the wireless unit (wireless communication section) has increased rapidly, and the difference in traffic volume between the wireless unit and the wired unit (wired communication section) is shrinking. Further, with the progress of communication-type communication such as P2P (Peer to Peer), it is expected that traffic in the upward direction as well as the conventional direction will increase in the future. As a result, it is expected that the wired part will become a bottleneck due to traffic in the wireless area. Therefore, the traffic control for wireless terminals such as mobile phones has a problem that the traffic load of the entire system cannot be distributed unless the wired and wireless integrated control is performed.
Patent Document 1 is a quality control technique for communication between a wireless unit, that is, a wireless base station and a wireless terminal, and is not a control technique for an entire network in which wired / wireless is mixed.
In Patent Document 2, a proposal is made to install a control device in a base station in order to measure wired communication quality. However, the measurement and detection accuracy of uplink communication quality is only the traffic from the base station. In addition, the base station in the area where it is determined that the communication quality has deteriorated performs the traffic control by lowering the transmission output level of the base station to a constant level. A terminal located in the position cannot communicate. Therefore, the base station in the adjacent area increases the transmission power level to cover and solve the communication impossible state. However, this technology changes the transmission power level of the adjacent cell, so it is necessary to reset the area. In addition, there is a problem that control becomes impossible when the traffic amount of the adjacent cell is large.
The present invention has been made to solve such a problem, and an object of the present invention is to provide a traffic control device, a traffic control system, and a traffic control method that control the amount of traffic in the upstream direction by performing wireless and wired integrated control. And

  The traffic control device specifies a terminal having a good communication state when the uplink communication traffic between the base station and the wired network becomes excessive, and lowers the transmission output level in order to suppress the transmission band of the terminal. Alternatively, the uplink traffic volume is controlled by controlling the modulation method.

According to the first solution of the present invention,
A traffic control device in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and the network device,
A traffic volume storage area for storing the traffic volume in the wired network in the uplink direction from the base station to the wired network for each base station;
For each base station, a wireless reception state storage area for storing an index indicating a radio wave reception state received from the wireless terminal at the base station for each wireless terminal;
A control determination unit that refers to the traffic volume in the wired network stored in the traffic volume storage area and extracts a base station whose traffic volume exceeds a predetermined first threshold;
The wireless terminal having a good communication state in the extracted base station is identified based on the index indicating the radio wave reception state stored in the wireless reception state storage area and the second threshold, and the transmission band from the wireless terminal is suppressed. A traffic control device including a radio bandwidth control unit is provided.

According to the second solution of the present invention,
A traffic control system in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and a network device,
A traffic control device;
The base station for measuring an indicator indicating a radio wave reception state received from the wireless terminal, and transmitting to the traffic control device;
Measuring the amount of traffic in the wired network in the upstream direction from the base station to the wired network, and transmitting to the traffic control device, and the network device,
The traffic control device
Traffic amount storage area for storing the traffic amount in the wired network in the uplink direction from the base station to the wired network for each base station;
For each base station, a wireless reception state storage area for storing an index indicating a radio wave reception state received from the wireless terminal at the base station for each wireless terminal;
A control determination unit that refers to the traffic volume in the wired network stored in the traffic volume storage area and extracts a base station whose traffic volume exceeds a predetermined first threshold;
The wireless terminal having a good communication state in the extracted base station is identified based on the index indicating the radio wave reception state stored in the wireless reception state storage area and the second threshold, and the transmission band from the wireless terminal is suppressed. A traffic control system having a radio bandwidth controller is provided.

According to the third solution of the present invention,
A traffic control method in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and a network device,
The amount of traffic in the wired network in the upstream direction from the base station to the wired network is stored for each base station,
For each base station, an index indicating the radio wave reception state received from the wireless terminal at the base station is stored for each wireless terminal,
Referring to the stored traffic volume in the wired network and extracting the base station whose traffic volume exceeds a predetermined first threshold;
There is provided a traffic control method for identifying a wireless terminal having a good communication state in an extracted base station based on a stored index indicating a radio wave reception state and a second threshold, and suppressing a transmission band from the wireless terminal.

  According to the present invention, it is possible to provide a traffic control device, a traffic control system, and a traffic control method that perform integrated control of wireless and wired and control the amount of traffic in the upstream direction.

1 is a block configuration diagram of an entire system including a traffic control device in Embodiment 1. FIG. It is a figure of the example of a transmission output level correspondence table | surface of the terminal with respect to the wired network traffic volume in Example 1. FIG. It is a figure of the traffic amount table example in Example 1 and 2. FIG. It is a figure of the example of a reception level table in Example 1 and 2. FIG. FIG. 3 is a schematic diagram illustrating an upstream traffic control system according to the first and second embodiments. FIG. 6 is a schematic diagram illustrating when the uplink traffic of the radio base station 3-1 increases in the uplink traffic control system according to the first and second embodiments. It is explanatory drawing which shows operation | movement description of the whole traffic control apparatus in Example 1 and 2. FIG. FIG. 6 is an explanatory diagram illustrating a traffic control method in a base station according to the first embodiment. It is a block diagram of the traffic control apparatus of the whole system in Example 2. It is a figure of the example of the application information table in Example 2. FIG. It is a figure of the example of a transmission output level correspondence table | surface of the terminal with respect to the amount of wired network traffics in Example 2. FIG. It is explanatory drawing which shows the method of the traffic control in the base station in Example 2. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1. Example 1
FIG. 1 is a block diagram of an entire network system including a traffic control device according to the first embodiment. This network system (traffic control system) includes a network device 1, a traffic control device 2, and a radio base station 3-1. The wireless area 4 is composed of a wireless base station 3-1 and wireless communication terminals (1 -n) 3-1-1-3-1-1-n within the area. In some cases, a wireless communication terminal is hereinafter simply referred to as a terminal, and a wireless base station is hereinafter simply referred to as a base station. The network system may include a plurality of network devices 1 and base stations 3-1. In addition, a plurality of base stations 3-1 may be connected under the network device 1.
The network device 1 includes, for example, a network I / F (Interface) 5 connected to the base station 3-1 in the wireless area 4 and a wired traffic amount having a function of collecting traffic information (for example, traffic amount) of the wired network. A measurement unit 7 is included. In addition, since the network device 1 refers to information up to the IP layer, it may be placed in any device of the wired network 6-1 as long as it has a layer 3 function.
The traffic control device 2 includes, for example, a wired traffic volume totaling unit 11 that totals wired network traffic information measured by the network device 1 and a reception level (base station) for each terminal periodically measured by the base station. Radio reception level totaling unit (radio reception state totaling unit) 8 and control determining unit 9 for extracting a base station whose traffic volume exceeds a predetermined threshold from the traffic information of the wired network; The base station includes a level control unit (radio band control unit) 10 for specifying a terminal having a good communication state and issuing an instruction of a transmission output level of the terminal, and a storage device 12. Note that the traffic volume and the reception level may be measured irregularly instead of regularly.

The storage device 12 aggregates the traffic information of the wired network periodically collected by the network device 1 and creates and stores a traffic volume per unit time for each base station (traffic volume storage area) 12. -3, the reception level information table (wireless reception state storage area) 12-1 that stores and stores the reception levels for each terminal periodically measured by the base station, and the traffic amount of the wired network according to the congestion level A transmission output level correspondence table (bandwidth suppression information storage area) 12-2 in which the transmission output level of a terminal having a good communication state is associated with each stage. A configuration example of each table will be described later. Each table is not limited to a table format, and may store information in an appropriate storage form or may be stored in an appropriate storage area.
The radio base station 3-1 includes, for example, a base station radio communication unit 14 connected to the radio networks 13-1 to 13-n and radio terminals (1 -n) 3-1-1-1 in the radio area 4. It has the reception level measuring part 15 for every terminal provided with the function which collects the reception level information of 3-1-n, and the level control part 16 which receives the instruction | indication which the traffic control apparatus 2 issued. Also, the wireless communication terminals (1 to n) 3-1 to 1-3-n are, for example, terminal wireless communication units 17-1 to 17-n connected to the wireless networks 13-1 to 13-n. And a transmission power control unit 18-1 to 18-n for receiving the transmission output level indicated by the base station and setting the output from the terminal to the transmission output level.
Here, the reception level is described as an example, but an appropriate index indicating the radio wave reception state received by the base station from the terminal may be used. In addition to controlling the transmission output level of the terminal, the transmission band of the wireless terminal may be suppressed by an appropriate method.

FIG. 2 is an example of the terminal transmission output level correspondence table 12-2 for the wired network traffic amount stored in the storage device 12 of the traffic control device 2.
Here, the traffic amount of the wired network is divided into, for example, five stages according to the degree of congestion, and the transmission output level (band suppression information) of the terminal having a good communication state is stored in correspondence with each stage. A predetermined value based on experience or calculation is assigned as a threshold value for dividing each stage. At the stage of threshold 1 (the traffic volume is equal to or less than threshold 1), that is, the stage where the wired network traffic volume is the smallest, the transmission output level of the terminal identified as having a good communication state is not changed. In the stage of threshold value 2 (the traffic volume is in the range of threshold value 1 to threshold value 2), for example, the transmission output level of the identified terminal is set to a level that is 2 dB lower than the default value. Thereafter, the amount of decrease is set stepwise so that the transmission output level of the identified terminal decreases as the traffic volume of the wired network increases. In the first embodiment, five stages are provided as the stage of the wired network traffic volume, but the present invention is not limited to this, and can be divided into other plural stages. In FIG. 2, for comparison, it is shown that a terminal having a poor communication state is not changed, but it may not be stored in the transmission output level correspondence table 12-2. Note that a terminal having a good communication state and a terminal having a bad communication state can be determined based on, for example, whether or not the reception level of the terminal exceeds a predetermined threshold (second threshold).

FIG. 3 is an example of the traffic volume table 12-3. The traffic information of the wired network periodically collected by the network device 1 is totaled by the traffic volume totaling unit 11, and the traffic volume per unit time is stored for each base station. In the example of FIG. 3, the base station ID and the traffic amount per unit time of the base station indicated by the base station ID are stored corresponding to the measurement time.
For example, the wired traffic amount measurement unit 7 of the network device 1 measures the traffic amount between the base station 3-1 and the network device 1 (for example, the traffic amount in the upstream direction from the base station to the wired network). When a plurality of wireless base stations are connected to the network device 1, the wired traffic amount measuring unit 7 measures the traffic amount for each wireless base station. The wired traffic amount totaling unit 11 of the traffic control device 2 collects traffic information from the network device 1. The wired traffic volume totalization unit 11 totals the traffic volume per unit time for each wireless base station, and stores the measurement time, the base station ID, and the traffic volume in the traffic volume table 12-3. The information on the measured traffic volume may be stored in the network device 1 and collected by the wired traffic volume totalization unit 11 at regular intervals, for example. The traffic information may be collected at an appropriate timing other than every fixed period. Further, the network device 1 may aggregate the traffic amount for each radio base station.

FIG. 4 is an example of the reception level information table 12-1 in which the reception level information for each terminal periodically measured by the radio base station is tabulated and stored. For example, reception level information is stored corresponding to the terminal ID as shown in FIG. The traffic control device 2 has, for example, a reception level information table 12-1 shown in FIG. 4 for each radio base station.
For example, the reception level measurement unit 15 of the base station 3-1 measures the reception levels of signals received from the terminals 3-1-1 to n. The radio reception level totaling unit 8 of the traffic control device 2 collects the terminal ID and the reception level from the radio base station 3-1, and stores them in the reception level information table 12-1 of the corresponding base station.

FIG. 5 is a schematic diagram illustrating an upstream traffic control system according to the first embodiment. FIG. 5 shows radio communication terminals 3-1-1-3-1-3-3-1 in the area of the radio base stations 3-1 and 3-2 and the radio base stations 3-1 and 3-2. 3-2-n, wired network networks 6-1 to 6-2 connecting the wireless base stations 3-1, 3-2 and the network device 1, the wireless base stations 3-1, 3-2 and applications 1 shows a network device 1 (21-1 to 21-5) that relays data transmitted to and received from a server 20, and a traffic control device 2 that performs traffic control by observing both wireless and wired states. ing. The network device 1 includes a plurality of network devices 21-1 to 21-5 such as routers, switches, SGSN (Serving GPRS Support Node), and GGSN (Gateway GPRS Support Node).
A route 22 indicates a route connecting the traffic control device 2 and the network device 1. Paths 23-1 to 23-4 indicate paths that connect the traffic control device 2 and the radio base stations 3-1 and 3-2. The routes 25-1 to 25-6 and 26-1 to 26-6 are respectively the radio base stations 3-1 and 3-2 and the radio communication terminals 3-1 to 3-1 in the area of each radio base station. The path | route which connects -1-n and 32-1-3-2-n is shown.
In addition, circles 24-1 and 24-2 surrounding each radio base station 3-1, 3-2 schematically represent a communication area covered by each radio base station.
Next, the operation of the first embodiment will be described. Here, as shown in the schematic diagram of FIG. 6, the amount of uplink traffic from the wireless base station 3-1 to the wired network increases and reaches a threshold value (first threshold value), and communication of the wireless base station 3-1 is performed. A case where the transmission output level of a wireless communication terminal in a good area is reduced will be described. A circle 27 in the communication area 23-1 of the radio base station 3-1 schematically represents a communication area in the radio base station 3-1 having a good communication state.

FIG. 7 shows an overall operation flowchart of the traffic control apparatus according to the first embodiment.
Before and in parallel with this flowchart, the collection and storage of the wireless reception level and the collection and storage of the wired traffic amount are performed as described above. The following processing can be performed, for example, at regular intervals (S1).
The control determination unit 9 in the traffic control device 1 refers to the traffic amount table 12-3, and the traffic amount between each radio base station and the network device is the threshold value 2 shown in FIG. 2 (corresponding to the first threshold value described above). It is searched whether there is a base station exceeding (S2). For example, the control determination unit 9 refers to the traffic volume corresponding to the latest measurement time in the traffic volume table 12-3 illustrated in FIG.
Here, when there is no base station whose traffic volume exceeds the threshold 2, the control determination unit 9 cancels the traffic reduction control when there is a base station that has already performed traffic reduction control (S5), and waits for a certain time again. (S1), and the process after step S2 is repeated. Even when the traffic volume of the base station performing the traffic reduction control falls below the threshold value 2, the traffic control is canceled here (S5).
On the other hand, when the traffic volume exceeds the threshold value 2, the control determination unit 9 extracts and stores a base station (hereinafter also referred to as a target base station) whose traffic volume exceeds the threshold value 2 (S3). .
The traffic control device 2 performs traffic control (traffic reduction control) so as to reduce the traffic volume in the base station with respect to the base station whose traffic volume exceeds the threshold (S4).

Next, traffic control in the base station where the traffic volume exceeds the threshold 2 will be described with reference to FIG. FIG. 8 shows operations by the traffic control device, the base station, and the terminal.
First, a method for extracting wireless terminals for suppressing the transmission band will be described. The level control unit 10 in the traffic control device 2 refers to the reception level information table 12-1 of the target base station in the storage device 12 in the traffic control device 2, and the reception level of the terminal is equal to or higher than a preset threshold value. A certain terminal is extracted as a terminal having a good communication state (S6). In addition, as a method for extracting a terminal having a good communication state, a condition that the distance between the base station and the terminal is smaller than a preset threshold distance may be used in addition to using the reception level of the terminal as an index. In this case, the traffic control device collects and stores the distance between the base station and the terminal.
The level control unit 10 in the traffic control device 2 lowers the extracted transmission output level of the wireless communication terminal according to the transmission output level correspondence table 12-2 shown in FIG. Instruct (S7). For example, the level control unit 10 acquires the traffic amount in the wired network of the target base station from the traffic amount table 12-3, refers to the transmission output level correspondence table 12-2 based on the acquired traffic amount, and sets each threshold value. The reduction amount of the transmission output level of the terminal corresponding to the stage specified in is specified. The level control unit 10 transmits, to the target base station, an instruction including the specified transmission output level reduction range and the extracted terminal ID of the terminal having a good communication state.
In response to an instruction from the level control unit 10 in the traffic control device 2, the level control unit 16 in the target base station 3-1 transmits a transmission output to the specified wireless communication terminal having a good communication state. An instruction is given to lower the level (S8). For example, the transmission output level is instructed to be reduced by the instructed reduction amount.

The wireless communication terminal that has received the instruction from the level control unit 16 in the target base station 3-1 lowers the transmission output level by, for example, the instructed reduction amount (S 9). When the transmission output level from the terminal is lowered, the uplink transmission band is reduced, and the amount of uplink traffic in the wireless section and the wired section is reduced. In a system that changes the modulation method according to the radio wave condition between the base station and the terminal, it is recognized that the radio wave between the base station and the terminal has improved when the transmission output level from the terminal decreases, and the modulation method is changed. There is a case.
If reception level determination has been completed for all terminals in the area of the target base station, the process ends. If not, step S6 and subsequent steps are repeated.
Further, instead of lowering the transmission output level, the modulation band may be changed directly to suppress the transmission band. In this case, the transmission output level correspondence table illustrated in FIG. 2 may store a modulation scheme in which the amount of suppression of the transmission bandwidth of the wireless terminal increases as the traffic amount of the wired network increases.
According to such a form of the first embodiment, when the uplink traffic increases, the transmission capacity is reduced by reducing the transmission output level only for terminals having good communication state, so that the base stations cooperate with each other. Thus, it is possible to perform upstream traffic control between the base station and the wired network without resetting the area.

2. Example 2
Next, Example 2 will be described. In the second embodiment, regarding the method of extracting terminals for controlling the transmission band, traffic control is performed by identifying terminals having high reception levels and terminals having a large data transmission capacity.
FIG. 9 is a block diagram of the entire system including the traffic control device according to the second embodiment. This network system (traffic control system) includes a network device 1 connected to a wired network, a traffic control device 2, and a wireless system including a wireless base station device 3-1. The second embodiment is a configuration in which a function is added to the traffic control device in the first embodiment, and the wireless system including the network device 1 and the wireless base station 3-1 is the same component as the first embodiment Description is omitted.
In addition to the functions shown in the first embodiment, the traffic control device 2 is a radio that aggregates application information (hereinafter referred to as application information) for each terminal measured by the base station 3-1 periodically (or irregularly). A terminal connection application information totaling unit (application information totaling unit) 28 is further included. Whether the information collected by the wireless terminal connection application information totaling unit 28 is acquired from the band of an application requested by each wireless terminal in the area at the wireless base station (so-called application, “Apps”). Or you may acquire from the packet number (for example, layer 2) of each radio | wireless terminal which the network apparatus 1 in the wired network 6 measures.

Furthermore, the storage device 12 includes an application information table 12-4 that stores application information for each terminal measured by the base station, in addition to the functions shown in the first embodiment.
An example of the application information table 12-4 storing application information for each terminal is shown in FIG.
FIG. 11 is an example of a transmission output level correspondence table 12-2 of the terminal with respect to the wired network traffic amount stored in the storage device 12 of the traffic control device 2. Here, the traffic amount of the wired network is divided into, for example, five stages according to the degree of congestion, and the transmission output level of a terminal having a good communication state and a large data transmission capacity is stored in correspondence with each stage. A predetermined value based on experience or calculation is assigned as a threshold value for dividing each stage. In the stage of threshold 1 (the traffic volume is equal to or less than threshold 1), that is, the stage where the wired network traffic volume is the smallest, the transmission output level of the terminal identified as having a good communication state and a large transmission capacity is not changed. In the stage of threshold value 2 (the traffic volume is in the range of threshold values 1 to 2), for example, the transmission output level of the identified terminal is set to a level that is 2 dB lower than the default value. Thereafter, the amount of decrease is set stepwise so that the transmission output level of the identified terminal decreases as the traffic volume of the wired network increases. In the second embodiment, five stages are provided as the stage of the wired network traffic volume, but the present invention is not limited to this, and can be divided into other plural stages. Although FIG. 11 shows a case where the condition is not satisfied for comparison, this information may not be stored as described above.

A schematic diagram showing an upstream traffic control system according to the second embodiment is the same as that of the first embodiment (see, for example, FIGS. 5 and 6), and thus the description thereof is omitted.
The operation of the second embodiment will be described. Here, as shown in the schematic diagram of FIG. 6, the amount of traffic in the uplink direction from the wireless base station 3-1 to the wired network increases to reach a threshold value, and the communication state of the wireless base station 3-1 is good. A case where the transmission output level of the wireless communication terminal is reduced will be described.
The overall operation of the traffic control apparatus according to the second embodiment is the same as that in FIG. 7, and the detailed operation in the process S4 is different. Since the overall operations S1 to S3 are the same as those in the first embodiment, the description thereof is omitted.
A traffic control method for a base station whose traffic volume exceeds the threshold 2 will be described with reference to FIG.
First, a method for extracting wireless terminals for suppressing the transmission band will be described. The level control unit 10 in the traffic control device 2 refers to the reception level information table 12-1 of the target base station in the storage device 12 in the traffic control device 2, and the reception level of the terminal is set to a preset threshold (second A terminal having a transmission capacity equal to or higher than the threshold (third threshold) set in advance is determined by referring to the pre-application information table 12-4. Judge as many terminals. Then, the level control unit 10 extracts terminals that satisfy these two conditions (S11). In addition, as a method for extracting a terminal having a good communication state, a condition that the distance between the base station and the terminal is smaller than a preset threshold distance may be used in addition to using the reception level of the terminal as an index.

The level control unit 10 in the traffic control device 2 sets the extracted transmission output level of the wireless communication terminal to the target base station 3-1 according to the transmission output level correspondence table 12-2 shown in FIG. Instruct to lower (S7). Specific processing is the same as that in the first embodiment.
Upon receiving an instruction from the level control unit 10 in the traffic control device 2, the level control unit 16 in the base station 3-1 has a specified communication state and a wireless communication terminal having a large transmission capacity Is instructed to lower the transmission output level (S8). For example, the transmission output level is instructed to be reduced by the instructed reduction amount.
The wireless communication terminal that has received an instruction from the level control unit 16 in the base station 3-1 lowers the transmission output level by, for example, the instructed reduction amount (S 9).
If reception level determination has been completed for all terminals in the area of the target base station, the process ends. If not, step S6 and subsequent steps are repeated.
According to the form of the second embodiment, when the uplink traffic increases, the transmission capacity is reduced by reducing the transmission output level only for terminals having good communication conditions and terminals having a large data transmission capacity. Therefore, it is possible to perform uplink traffic control between the base station and the wired network without resetting the area in cooperation between the base stations.

3. Configuration Example [Configuration Example 1]
The traffic control apparatus in the first embodiment is a wired / wireless integrated traffic control apparatus,
A wired traffic amount totaling unit that totalizes wired network traffic information collected by the network device of the wired network network, a wireless reception level totaling unit that totals the reception level for each terminal that the base station regularly measures, A storage device that stores data of the wired traffic volume totaling unit and the wireless reception level totaling unit, a control determination unit that extracts a base station whose traffic volume exceeds a threshold value from traffic information of the wired network, and communication in the base station A level control unit that identifies a terminal in good condition and issues a transmission output level instruction only to that terminal;
One of the characteristics is to have.
[Configuration example 2]
In the traffic control device described in Configuration Example 1,
The storage device aggregates the traffic information of the wired network periodically collected by the network device, creates a traffic volume per unit time for each destination, stores the traffic volume table, and the base station periodically measures The reception level information table that collects and stores the received levels for each terminal and the traffic volume of the wired network is divided into stages according to the degree of congestion, and the transmission output level of the terminal with good communication status is associated with each stage. Output level correspondence table,
One of the characteristics is to have.

[Configuration example 3]
In the traffic control device described in Configuration Example 1,
The transmission output level correspondence table divides the traffic amount of the wired network into several stages according to the degree of congestion, and assigns the transmission output level so that the transmission output level of a terminal having a good communication state is reduced at each stage.
One of the characteristics is to have.
[Configuration Example 4]
In the traffic control device described in Configuration Example 1,
The level determination unit of Configuration Example 1 instructs the extracted wireless communication terminal to lower the level according to the transmission output level correspondence table via the wireless base station.
One of the characteristics is to have.

[Configuration Example 5]
The traffic control device according to the second embodiment is a wired / wireless integrated control device,
A wired traffic amount totaling unit that totalizes wired network traffic information collected by the network device of the wired network network, a wireless reception level totaling unit that totals the reception level for each terminal that the base station regularly measures, Stores the data of the wireless terminal connection application information totaling unit that aggregates the application information for each terminal periodically measured by the base station, the wired traffic amount totaling unit, the wireless reception level totaling unit, and the wireless terminal connection application information totaling unit Identifying a storage device, a control determination unit that extracts a base station whose traffic volume exceeds a threshold from traffic information of the wired network, a terminal having a good communication state in the base station, and a terminal having a large transmission capacity, A level control unit that issues a transmission output level instruction only to the terminal;
One of the characteristics is to have.
[Configuration Example 6]
In the traffic control device described in Configuration Example 5,
The storage device aggregates the traffic information of the wired network periodically collected by the network device, creates a traffic volume per unit time for each destination, stores the traffic volume table, and the base station periodically measures Congestion level of the reception level information table that collects and stores the received level for each terminal, the application information table that collects and stores the application information for each terminal periodically measured by the base station, and the traffic volume of the wired network And a transmission output level correspondence table in which the transmission output level of a terminal having a good communication state is associated with each stage,
One of the characteristics is to have.

[Configuration Example 7]
In the traffic control device described in Configuration Example 5,
The transmission output level correspondence table divides the traffic volume of the wired network into several stages according to the degree of congestion so that the transmission output level of a terminal having a good communication state and a terminal having a large transmission capacity is reduced at each stage. Assigning a transmit power level to
One of the characteristics is to have.
[Configuration Example 8]
In the traffic control device described in Configuration Example 5,
The level determination unit instructs the extracted wireless communication terminal to lower the level according to the transmission output level correspondence table via the wireless base station,
One of the characteristics is to have.

4). Effects According to the above-described embodiments, for example, the following effects can be obtained.
First effect: According to each of the above-described embodiments, the location of the control device may be installed in a device having a layer 3 function in the wired network, and it is necessary to install the control device for each base station. Compared with, cost can be greatly reduced.
Second effect: According to each of the embodiments described above, when it is determined that the communication quality has deteriorated, only the terminal having a good communication state is extracted without reducing the transmission output level of the base station as a whole, and the communication of the terminal is performed. Since the bandwidth is controlled, it is not necessary to cooperate with the adjacent area, and the base station can be controlled alone.
Third effect: According to each of the above-described embodiments, when it is determined that the communication quality has deteriorated, only the terminal having a good communication state is extracted without lowering the transmission output level of the base station as a whole. Since the bandwidth is controlled, the range of the communication area does not change. Accordingly, it is not necessary to reset the area where the communication quality is deteriorated and the adjacent area.
Fourth effect: According to each of the embodiments described above, since the communication quality state of the wired network is detected from a device having a layer 3 function, the traffic of the entire network is controlled with the measurement detection accuracy of the uplink communication quality. It becomes possible.

  The present invention can be used, for example, in a system that controls communication between a base station and a wired network in wireless communication.

DESCRIPTION OF SYMBOLS 1 ... Network device 2 ... Traffic control device 3-1 to 3-n ... Wireless base station 3-1-1 to 3-1-1 ... Wireless communication terminal 4 ... Wireless area 5 ... Network I / F
6-1, 6-2... Wired network 7... Wired traffic amount measuring unit 8... Radio reception level totaling unit 9. Control determining unit 10. Traffic volume totalization unit 12 ... storage device 12-1 ... reception level information table 12-2 ... transmission output level correspondence table 12-3 ... traffic volume table 12-4 ... application information table 13 -1 to 13-n ... wireless network 14 ... base station radio communication unit 15 ... reception level measurement unit 16 for each terminal ... level control units 17-1 to 17-n ... terminal radio Communication unit 1 to terminal wireless communication unit n
18-1 to 18-n... Transmission power control unit 1 to transmission power control unit n
DESCRIPTION OF SYMBOLS 20 ... Application server 21-1-20-5 ... Network apparatus 22 ... Path | route 23-1-23-4 which connects a traffic control apparatus and a network apparatus ... Traffic control apparatus and each wireless base Communication paths 25-1 to 25-6, 26-1 to 26-6... Each radio base station and routes 24-1, 24-2. Route 27 for connecting to a wireless communication terminal in the area of each wireless base station ... Communication area 28 in good communication state in wireless base station ... Wireless terminal connection application information totaling unit

Claims (12)

A traffic control device in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and the network device,
A traffic volume storage area for storing the traffic volume in the wired network in the uplink direction from the base station to the wired network for each base station;
For each base station, a wireless reception state storage area for storing an index indicating a radio wave reception state received from the wireless terminal at the base station for each wireless terminal;
A control determination unit that refers to the traffic volume in the wired network stored in the traffic volume storage area and extracts a base station whose traffic volume exceeds a predetermined first threshold;
The wireless terminal having a good communication state in the extracted base station is identified based on the index indicating the radio wave reception state stored in the wireless reception state storage area and the second threshold, and the transmission band from the wireless terminal is suppressed. A traffic control device comprising a radio bandwidth control unit.   The wireless bandwidth control unit refers to the traffic volume in the wired network stored in the traffic volume storage area, identifies the extracted traffic volume of the base station, and the larger the traffic volume of the base station, the more wireless The traffic control device according to claim 1, wherein the transmission band of the identified wireless terminal is suppressed so that a suppression amount of the transmission band of the terminal is increased. A bandwidth suppression information storage area in which a plurality of bandwidth suppression information is set in advance so that the amount of suppression of the transmission bandwidth of the wireless terminal increases as the traffic volume of the wired network increases and the bandwidth of the wired network increases. In addition,
The wireless bandwidth control unit refers to the traffic amount in the wired network stored in the traffic amount storage area, identifies the extracted traffic amount of the base station, and refers to the band suppression information storage area The traffic control device according to claim 2, wherein band suppression information at a stage corresponding to a traffic amount of a base station is specified, and the transmission band of the specified wireless terminal is suppressed according to the band suppression information. The transmission band from the wireless terminal is a transmission output level from the wireless terminal,
The traffic control apparatus according to claim 1, wherein the radio band control unit instructs the specified radio terminal to lower a transmission output level from the radio terminal. The wired network traffic volume is divided into multiple stages, and there is a band suppression information storage area in which multiple transmission output levels are set in advance so that the higher the wired network traffic volume, the lower the transmission output level from the wireless terminal. And
The radio bandwidth control unit refers to the traffic amount stored in the traffic amount storage area, identifies the extracted traffic amount of the base station, and refers to the band suppression information storage area of the base station. The traffic control device according to claim 4, wherein a transmission output level at a stage corresponding to a traffic amount is specified, and the specified transmission output level is instructed to the specified wireless terminal.   The traffic control device according to claim 1, wherein the radio band control unit controls a modulation scheme of the identified radio terminal to suppress a transmission band. Information on the traffic volume is received from a network device that collects traffic volume in the wired network, and the traffic volume in the wired network in the upstream direction from the base station to the wired network is stored in the traffic volume storage area for each base station. The traffic control device according to claim 1, further comprising a wired traffic amount totaling unit for storing. Radio reception status totalization that receives from each base station an index indicating the radio wave reception status received from the radio terminal, and stores the index for each radio station in the radio reception status storage area for each base station The traffic control device according to claim 1, further comprising a unit.   The wireless band control unit identifies the wireless terminal having a good communication state in the extracted base station based on the index indicating the radio wave reception state and the second threshold value, and has the transmission capacity larger than the third threshold value. The traffic control device according to claim 1, wherein a terminal is specified and a transmission band of a wireless terminal that satisfies both of the terminals is suppressed. The traffic control apparatus according to claim 9, further comprising an application information totaling unit that identifies a transmission capacity of the wireless terminal from an application band requested by the wireless terminal. A traffic control system in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and a network device,
A traffic control device;
The base station for measuring an indicator indicating a radio wave reception state received from the wireless terminal, and transmitting to the traffic control device;
Measuring the amount of traffic in the wired network in the upstream direction from the base station to the wired network, and transmitting to the traffic control device, and the network device,
The traffic control device
Traffic amount storage area for storing the traffic amount in the wired network in the uplink direction from the base station to the wired network for each base station;
For each base station, a wireless reception state storage area for storing an index indicating a radio wave reception state received from the wireless terminal at the base station for each wireless terminal;
A control determination unit that refers to the traffic volume in the wired network stored in the traffic volume storage area and extracts a base station whose traffic volume exceeds a predetermined first threshold;
The wireless terminal having a good communication state in the extracted base station is identified based on the index indicating the radio wave reception state stored in the wireless reception state storage area and the second threshold, and the transmission band from the wireless terminal is suppressed. A traffic control system having a radio bandwidth controller. A traffic control method in a network system including a wireless network between a wireless terminal and a base station, and a wired network between the base station and a network device,
The amount of traffic in the wired network in the upstream direction from the base station to the wired network is stored for each base station,
For each base station, an index indicating the radio wave reception state received from the wireless terminal at the base station is stored for each wireless terminal,
Referring to the stored traffic volume in the wired network and extracting the base station whose traffic volume exceeds a predetermined first threshold;
A traffic control method for identifying a wireless terminal having a good communication state in an extracted base station based on a stored index indicating a radio wave reception state and a second threshold, and suppressing a transmission band from the wireless terminal.

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