JP2009239780A - Call connection control method for each area in communication/broadcast cooperation system, call control server and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a call connection method and the like for maintaining a total number of call connections approximately up to the limit of a service providing facility, as an entire system, even when call connections exceeding the allowable number of connections occur in a partial area, regarding a communication/broadcast cooperation system. <P>SOLUTION: A call control server is included for monitoring the number of call connections to a service providing facility. The call control server determines the allowable number of connections for each area such that the total number of the call connections to the service providing facility becomes the limit of the service providing facility. The number of call connections for each area, which are actually originated from terminals, is estimated, and when a high-congestion area occurs in which the number of area call connections exceeds the allowable number of connections, the allowable number of connections in a low-congestion area, in which the number of area call connections does not exceed the allowable number of connections, is increased. Then, control information containing the allowable number of connections for each area is generated and the control information is transmitted to all terminals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transmission connection control method, a transmission control server, and a program for each area in a communication / broadcast cooperation system.

  A user can connect to the Internet via an access network using a terminal such as a personal computer or a mobile phone. A service providing facility such as a WWW (World Wide Web) content server is connected to the Internet, and the terminal can make outgoing connections to the content server.

  In recent years, access tends to be concentrated in a short time from a huge number of terminals to a specific content server. This is a device such as a mobile phone with a 1 seg (1 seg) function, a personal computer with a terrestrial digital broadcast reception function, an information home appliance with a BS (Broadcasting Satellite) digital broadcast reception function, a device such as a digital broadcast compatible TV There is a cause in the spread.

  For example, immediately after a viewer participation broadcast program (viewer questionnaire, quiz, TV shopping, etc.) or a disaster broadcast program is broadcast, the user tries to access a specific content server using each terminal. Accordingly, a large number of outgoing connections are made to a specific content server in a short time in conjunction with the broadcast program. The sudden increase in the number of outgoing connections (the number of accesses and the number of connections) rapidly deteriorates the congestion load state of the content server, and in the worst case, the operation of the content server is stopped.

  FIG. 1 is a configuration diagram of a communication / broadcasting cooperation system in the prior art.

  According to FIG. 1, each terminal 1 can receive broadcast data from the broadcast station server 3 and can connect to the base station 6 via radio. The base station 6 is connected to a mobile access network, and the mobile access network is interconnected with the Internet 4. In addition, a content server 2 that transmits and receives communication data is connected to the Internet 4. Accordingly, the terminal 1 can connect to the Internet 4 via the base station 6 and make outgoing connection to the content server 2. The terminal 1 can transmit and receive communication data to and from the content server 2 based on the content of broadcast data received from the broadcast station server 3.

  On the other hand, the content server 2 simultaneously sets connections for a plurality of terminals 1 that transmit, and transmits and receives communication data. Service providers (content providers, telecommunications (broadcasting) operators, etc.) often recommend that the terminal itself be equipped with a call control function in order to reduce the number of outgoing connections that occur simultaneously ( In some cases, outgoing connection control may be performed by a server or an intermediate node). Examples of the transmission control include transmission regulation and delay control. Such a terminal transmission control function reduces the load on the service providing equipment. Here, the “service providing facility” may be a content server or a communication (broadcasting) facility. Specifically, it means a service provider facility that accepts call information transmitted from a terminal.

  As a service provider, it is important to estimate the total number of outgoing connections from all terminals. If the actual number of all outgoing connections that occur simultaneously exceeds the limit of the number of service providing facilities, a facility expansion plan is also required.

  As a method for estimating traffic, there is a technique for estimating time-series traffic from calendar information based on past traffic data using a neural network (see, for example, Patent Document 1). There is also a technique for estimating the probability distribution followed by data exceeding a threshold value based on the estimated traffic and estimating it as peak traffic (see, for example, Patent Document 2). Furthermore, there is a technique for measuring the load on the exchange and estimating communication traffic according to the load situation (see, for example, Patent Document 3).

  For example, when the terminal has a transmission control function, the number of outgoing connections that occur simultaneously at a certain point and arrive at the content server is one for which transmission control has already been applied. It is not the true total number of outgoing connections that actually occurred in the terminal before outgoing control was applied. However, it is not preferable to generate the true total number of outgoing connections. If it occurs, the service quality deteriorates due to overload on the server and congestion on the network.

JP 2004-23114 A JP 2006-48276 A Japanese Patent Laid-Open No. 10-314592

  However, in event venues such as a concert hall and a baseball field, a lot of outgoing traffic may occur in the same time zone. In this case, all these terminals try to connect intensively to one base station covering the area. At this time, if the base station is connected from a terminal having a number larger than the allowable predetermined number of connections, the base station will miss the call and cause an overflow. Eventually, terminals located at such event venues often cannot make outgoing connections. As long as the allowable number of connections in the base station is limited, such an overflow state may always occur depending on the number of outgoing connections from a large number of terminals.

  The problem here is that the outgoing control for the terminal is determined based on the limit number of connections of the content server. That is, control information for outgoing control is generated so that the total number of outgoing connections is maintained near the limit number of connections. Nevertheless, if an overflow occurs at the base station and some calls are missed, the total number of outgoing connections will be less than the limit number of connections. This means that the total number of outgoing connections in the entire system is excessively controlled due to the congestion state in some base stations. In other words, the content server does not accept outgoing connections up to the vicinity of the limit number of connections, and is placed in a state with sufficient load.

  Therefore, the present invention provides a communication / broadcasting cooperation system, even when outgoing connections exceeding the allowable number of connections occur in some areas, as a whole system, all outgoing connections up to the limit number of connections of service providing facilities. It is an object of the present invention to provide a transmission connection control method, a transmission control server, and a program capable of maintaining the number.

According to the present invention, a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility for accepting outgoing connections from the terminals via the base station A terminal outgoing connection control method in
A transmission control server that monitors the number of outgoing connections to the service providing facility;
The outgoing call control server
A first step of determining the allowable number of connections for each area so that the total number of outgoing connections to the service providing facility is the limit number of connections of the service providing facility;
A second step of estimating the number of area outgoing connections for each area actually occurring from the terminal;
A third step of incrementing and setting the allowable number of connections in a low congestion area where the number of area outgoing connections does not exceed the allowable number of connections when a high congestion area where the number of area outgoing connections exceeds the allowable number of connections occurs; ,
A fourth step of generating control information including the allowable number of connections for each area;
A fifth step of transmitting control information to all of the terminals;
The terminal controls outgoing connection to the service providing facility based on the control information.

  According to another embodiment of the outgoing connection control method of the present invention, it is also preferable to set the third step by decrementing the allowable number of connections in the high congestion area.

  According to another embodiment of the outgoing connection control method of the present invention, in the third step, the low congestion area set by incrementing the number of allowable connections is the peripheral area of the high congestion area, next to the high congestion area, It is also preferable to use an area with a high number of area outgoing connections or an area designated in advance.

  According to another embodiment of the outgoing connection control method of the present invention, in the third step, the difference connection number between the area outgoing connection number and the allowable connection number in the high congestion area is measured, and the difference connection number is calculated. It is also preferable to set by adding to the allowable number of connections in the low congestion area.

According to another embodiment of the outgoing connection control method of the present invention,
The system is a communication / broadcasting cooperation system, further comprising a broadcast station server that broadcasts broadcast data,
For the fifth step, the transmission control server transmits control information to the broadcast station server, the broadcast station server broadcasts broadcast data including the control information, and the terminal receives and controls the broadcast data from the broadcast station server. It is also preferable to acquire information.

According to another embodiment of the outgoing connection control method of the present invention,
For the second step, the call control server estimates the number of area call connections for each area.
The control information includes a predetermined ratio value with respect to the total number of terminals,
The device compares the percentage value with the unique value of the device to determine whether it is a measurement target,
When the terminal subject to measurement generates a transmission operation, it sends it to the service providing facility along with the area information.
The outgoing call control server measures the number of partial outgoing connections from all the terminals that are the measurement target for each service providing facility, for each area,
It is also preferable that the transmission control server calculates the number of area transmission connections for each area based on the number of partial transmission connections and the ratio value.

According to another embodiment of the outgoing connection control method of the present invention,
The eigenvalue is also preferably a random value generated by a random number generator or an identification information value unique to the terminal.

According to the present invention, a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility that accepts outgoing connections from the terminals via the base station. A transmission control server further provided;
Outgoing connection number monitoring means for monitoring the number of outgoing connections to the service providing facility;
Area transmission connection number estimation means for estimating the number of area transmission connections for each area actually occurring from the terminal;
Allowable connection number setting means to increment and set the allowable number of connections in a low congestion area where the number of area outgoing connections does not exceed the allowable number of connections when a high congestion area where the number of area outgoing connections exceeds the allowable number of connections occurs When,
Control information generating means for generating control information including the allowable number of connections for each area;
And control information transmitting means for transmitting the control information to all of the terminals.

  According to another embodiment of the transmission control server of the present invention, it is preferable that the allowable connection number setting means further sets the allowable connection number in a high congestion area by decrementing.

According to another embodiment of the transmission control server of the present invention,
The low-congestion area that is set by incrementing the allowable connection number is an area with the highest number of area outgoing connections after the peripheral area of the high-congestion area, the high-congestion area, or an area designated in advance. It is also preferable that

According to another embodiment of the transmission control server of the present invention,
The allowable connection number setting means measures the difference connection number between the area outgoing connection number and the allowable connection number in the high congestion area, and sets the difference connection number in addition to the allowable connection number in the low congestion area. Is also preferable.

According to another embodiment of the transmission control server of the present invention,
The system is a communication / broadcasting cooperation system, further comprising a broadcast station server that broadcasts broadcast data,
The control information transmitting means preferably transmits the control information to the broadcast station server.

According to another embodiment of the transmission control server of the present invention,
The control information includes a predetermined ratio value with respect to the total number of terminals,
The means for estimating the total number of outgoing connections is
The device compares the percentage value with the unique value of the device to determine whether it is a measurement target,
When the terminal subject to measurement generates a transmission operation, it sends it to the service providing facility along with the area information.
The outgoing call control server measures the number of partial outgoing connections from all the terminals that are the measurement target for each service providing facility, for each area,
It is preferable that the transmission control server calculates the number of area transmission connections for each area based on the number of partial transmission connections and the ratio value.

  According to another embodiment of the transmission control server of the present invention, the eigenvalue is preferably a random value generated by a random number generation unit or an identification information value unique to the terminal.

According to the present invention, a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility that accepts outgoing connections from the terminals via the base station. Further, a transmission control program for functioning a computer mounted on a server provided,
Outgoing connection number monitoring means for monitoring the number of outgoing connections to the service providing facility;
Area transmission connection number estimation means for estimating the number of area transmission connections for each area actually occurring from the terminal;
Allowable connection number setting means to increment and set the allowable number of connections in a low congestion area where the number of area outgoing connections does not exceed the allowable number of connections when a high congestion area where the number of area outgoing connections exceeds the allowable number of connections occurs When,
Control information generating means for generating control information including the allowable number of connections for each area;
The computer is caused to function as control information transmitting means for transmitting control information to all terminals.

  According to the transmission connection control method, the transmission control server, and the program of the present invention, even if a transmission connection exceeding the allowable number of connections occurs in some areas in the communication / broadcast cooperation system, the service as a whole system is provided. The total number of outgoing connections can be maintained up to the limit number of connections of the provided equipment.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a graph of the total number of outgoing connections actually occurring.

  FIG. 2 shows the total number of outgoing connections over time. This total number of outgoing connections is the number of true total outgoing connections that are actually occurring and are not controlled by the terminal. According to FIG. 2, the true total number of outgoing connections exceeds the limit number of connections of the service providing equipment, and it is not preferable to actually generate it. Examples of service providing facilities include communication facilities, broadcasting facilities, content servers, and the like. When the number of outgoing connections exceeding the capacity of such service providing facilities occurs, overload and congestion occur, and service quality deteriorates.

  FIG. 3 is a graph of the total number of outgoing connections for which outgoing control is performed.

  It is necessary to perform outgoing control on the terminal so that the total number of outgoing connections is less than or equal to the limit number of connections of the service providing facility. When the terminal has a transmission control function, how much transmission control is realized is based on an instruction from the service provider network. Usually, the number of outgoing connections exceeding the limit number of connections is controlled by outgoing call regulation or delay control. As shown in FIG. 3, by performing outgoing control so that the total number of outgoing connections is the limit number of connections of service providing facilities, without degrading service quality (without causing overload or congestion), In addition, operation that makes full use of system resources becomes possible. Thereby, the system down of service provision equipment can also be avoided.

  Here, even if the total number of outgoing connections for the limit number of service providing facilities is sufficiently controlled, if outgoing connections from a large number of terminals are concentrated on some base stations (areas), calls are caused by overflow. Something is lost. At this time, the total number of outgoing connections is smaller than the limit number of connections of the service providing facility. The total number of outgoing connections will eventually be less than the limit number of connections, despite the attempt to control it to be the limit number of connections.

  FIG. 4 is an area configuration diagram for controlling the number of outgoing connections.

  According to FIG. 4, the whole area is covered by a plurality of areas centered on the base station. Here, it is assumed that the number of outgoing connections in area 10 exceeds the allowable number of connections in area 10. At this time, calls that exceed the limit number of connections of the base station are missed. According to FIG. 4, the periphery of the area 10 is arranged by areas 7, 8, 9, 11, 12, and 13. When the area 10 becomes highly congested, it is assumed that the number of outgoing connections in the surrounding area is relatively large.

  FIG. 5 is a graph showing transmission control in the present invention.

  According to FIG. 5, the area corresponding to FIG. 4 is represented on the horizontal axis, and the number of outgoing connections is represented on the vertical axis. As described with reference to FIG. 4, it is assumed that the number of outgoing connections exceeding the limit connection number of the base station is estimated in the area 10.

Here, the number of area outgoing connections that represents the number of outgoing connections for each area is estimated by sample traffic (number of partial outgoing connections). For example, the ratio value x (for example, 10%) of the measurement target terminal is set and the ratio value (1-x) (for example, 90%) of the non-measurement target terminal is set. Then, only the partial outgoing connection number ρ (for example, 1,000 calls) from the measurement target terminal is measured. Using the ratio value x of the measurement target terminals and the partial transmission connection number ρ from the measurement target terminals in the area, the area transmission connection number A can be estimated by the following equation.
A = ρ · 100 / x (%)
(For example, A = 1,000 (ρ) · 100/10 (x) = 10,000 calls)

  A limit number of connections is defined for the base station. According to FIG. 5, it is assumed that the limit number of connections of the base stations arranged in all areas is the same. The number of outgoing connections over the limit number of connections will be lost.

  Also, the number of allowable connections is defined. The “allowable number of connections” means the number of outgoing connections allowed for each area based on the limit number of connections of the service providing facility. When a high congestion area (for example, area 10) in which the number of area outgoing connections exceeds the allowable number of connections occurs, the number of allowable connections in the low congestion area where the number of area outgoing connections does not exceed the allowable number of connections is incremented and set. . It is also preferable to set by decrementing the number of allowable connections in a high congestion area. Since call drop has already occurred, the amount of decrease in the number of allowable connections in the high congestion area can be distributed to other low congestion areas.

  According to FIG. 5, the low congestion area set by incrementing the allowable number of connections is a peripheral area of a high congestion area (for example, area 10). This is because the number of outgoing connections is also assumed to be relatively large in the area around the high congestion area. As another selection, the allowable connection number in an area where the number of area outgoing connections is high next to the high congestion area may be set incrementally. Further, the allowable number of connections in a predesignated area may be set incrementally.

  Specifically, the difference connection number between the area transmission connection number and the allowable connection number in the high congestion area is measured, and the difference connection number is added to the allowable connection number in the low congestion area and set.

  FIG. 6 is a configuration diagram of a communication / broadcasting cooperation system to which the present invention is applied.

  According to FIG. 6, compared with FIG. 1, the transmission control server 5 is further provided. The transmission control server 5 only monitors the outgoing connection between the terminal 1 and the content server 2 and has a lighter load than the content server 2. Of course, the function of the transmission control server 5 may be included in the content server 2 and integrated.

  Moreover, according to FIG.1 and FIG.6, although the broadcasting station server 3 is provided, according to this invention, this does not need to be made into an essential component. The control information generated by the transmission control server 5 only needs to be transmitted to all terminals, and other methods other than the broadcast station server, for example, the transmission control server 5 transmits the control information directly to all terminals. It may be a thing.

  A functional configuration of each device in the system of FIG. 6 will be described.

  According to FIG. 6, the outgoing call control server 5 includes an outgoing connection number monitor unit 51, an area outgoing connection number estimation unit 52, an entire outgoing connection number estimation unit 53, an allowable connection number setting unit 54, and a control information generation unit. 55 and a control information transmission unit 56. These functional units can be realized by executing a transmission control program that causes a computer mounted on the server to function.

  The outgoing connection number monitoring unit 51 monitors the outgoing connection number for the service providing equipment. Thereby, the partial transmission connection number ρ from the measurement target terminal can be measured. The measurement target terminal immediately transmits when there is a transmission request, but the non-measurement target terminal is temporarily suspended and controlled for transmission even when there is a transmission request.

  Note that the outgoing connection number monitoring unit 51 may once accept an outgoing connection from the measurement target terminal and transfer the outgoing call to the content server 2. It has a function like a proxy server and relays communication between the terminal 1 and the content server 2.

  The area outgoing connection number estimation unit 52 estimates the number of outgoing connections actually generated from the terminal for each area. The area transmission connection number A can be calculated according to the partial transmission connection number ρ and the ratio value x. The number of outgoing connections estimated for each area is output to the total outgoing connection number estimation unit 53.

  For example, it is assumed that the ratio value x is included in the control information. The ratio value x represents the ratio of the measurement target terminals to the total number of terminals. As the ratio value x increases, the number of terminals monitored by the transmission control server 5 increases and the load increases, but the number of outgoing connections close to reality can be estimated. On the other hand, as the ratio value x is decreased, the number of terminals monitored by the transmission control server 5 is reduced and the load is reduced. However, only the number of outgoing connections including many errors can be estimated. However, when there are a large number of terminals that make outgoing connections, the total number of outgoing connections can be estimated with high accuracy even if x is small, based on statistical principles.

  The total outgoing connection number estimation unit 53 estimates the total outgoing connection number for a specific service providing facility by totaling the outgoing connection number for each area received from the area outgoing connection number estimation unit 52.

  The allowable connection number setting unit 54 increments the allowable connection number in a low congestion area where the number of area transmission connections does not exceed the allowable connection number when a high congestion area where the number of area transmission connections exceeds the allowable connection number occurs. To set. It is also preferable that the allowable connection number setting unit 54 decrements and sets the allowable connection number in the high congestion area. Further, the allowable connection number setting unit 54 is configured such that the low congestion area set by incrementing the allowable connection number is a peripheral area of the high congestion area, an area having the highest number of area outgoing connections next to the high congestion area, or designated in advance. Area. Specifically, the allowable connection number setting unit 54 measures the difference connection number between the area outgoing connection number and the allowable connection number in the high congestion area, and uses the difference connection number as the allowable connection number in the low congestion area. Add and set.

  Here, it is also preferable that the allowable connection number setting unit 54 stores in advance a “maximum connection number” information for each area in a database. The “maximum number of connections” is the maximum number that can be connected in the area, and may be the same as the limit number of connections of the base station described above. For a low congestion area, the allowable number of connections is incremented, but the allowable number of connections cannot exceed the maximum number of connections. When the allowable number of connections exceeds the maximum number of connections for each area, the corresponding number of connections should be distributed to other areas.

  The control information generation unit 55 generates control information including the allowable number of connections for each area. The control information can be in a data form corresponding to the application. For example, one control information may be uniformly transmitted to all terminals by broadcast data, and it may be determined whether or not the terminal itself can transmit in the next slot. In the control information, a terminal that can make a call in the next slot may be specified.

  The control information transmission unit 56 transmits the control information to the broadcast station server 3. The control information may be transmitted directly to the terminal 1.

  According to FIG. 6, the terminal 1 includes a broadcast receiving unit 11, a communication interface unit 12, a control information acquisition unit 13, and a transmission control unit 14. These functional units can also be realized by executing a program that causes a computer installed in the terminal to function.

  The broadcast receiving unit 11 receives broadcast data broadcast from the broadcast station server 3. Broadcast data includes control information. The broadcast data may include the address of the transmission control server 5. As a result, the measurement target terminal can know the address of the content server 2.

  The communication interface unit 12 communicates with the base station 6 via a wireless link. The communication interface unit 12 transmits a call connection request from the call control unit 14 to the content server 2. In addition, it is also preferable to include in the data a flag indicating whether or not transmission control is performed.

  The control information acquisition unit 13 acquires control information from broadcast data. The control information may include the ratio value x, or may be information specifying the measurement target terminal. Here, it is also preferable to acquire the address of the transmission control server 5 from the broadcast data.

  The outgoing call control unit 14 executes outgoing call control together with area information when a outgoing call connection request is generated by the user. The “area information” may be a base station identifier or latitude / longitude information acquired by GPS (Global Positioning System). If it is latitude / longitude information, the transmission control server 5 identifies the area.

  When the control information includes a ratio value x for estimating the number of outgoing connections, the outgoing control unit 14 also preferably generates a random value r. The random value r (eigenvalue) and the ratio value x are compared. Specifically, when the random value r is equal to or less than (or more than) the ratio value x, the terminal is determined to be a measurement target terminal. For example, when the ratio value 30% is specified and the random value (range of 1 to 100) is “30” or less, it is determined that the terminal is a measurement target terminal. Conversely, it may be determined that the terminal is a non-measurement target terminal. If it is a measurement target terminal, transmission control is invalidated, and if it is a non-measurement target terminal, transmission control is enabled. Terminals for which transmission control is enabled can be temporarily suspended, and then sequentially released according to the time of occurrence based on the control information.

  Also, a unique identification information value (unique value) may be used instead of the random value r. Specifically, the unique identification information value is a telephone number, a MAC (Media Access Control) address, an identification number (hardware ID, a unique ID defined by digital terrestrial broadcasting), or these identification information values. Such as a combination. In this way, by comparing the eigenvalue and the ratio value x, a terminal having a certain ratio value with respect to the total number of terminals can be set as a measurement target terminal. For example, in the case of a telephone number, 10% of measurement target terminals are selected by designating one number (for example, “9”) among the last one digits “0” to “9” as a percentage value. It becomes. Further, by designating the ratio value as “odd number”, 50% of measurement target terminals are selected.

  According to FIG. 6, for the broadcast station server 3, the control information adding unit 32 adds the control information received from the transmission control server 5 to the broadcast data broadcast from the broadcast data storage unit 31. Here, the address (URL) of the transmission control server 5 may be further received from the transmission control server 5, and the address may be included in the broadcast data.

  Broadcast data is described in, for example, BML (Broadcast Markup Language). BML is a page description language for data broadcasting based on XML defined by ARIB (Radio Industry Association). Control information and information such as a URL (Uniform Resource Locator) of a content server can be described by BML.

  The broadcast data is broadcast from the broadcast data transmission unit 33 to a huge number of terminals 1 by broadcast waves. Thereby, the terminal 1 can know the control information (including the ratio value x and the address of the transmission control server 5).

  As described above, the total number of outgoing connections can be estimated by classifying the measurement target terminal and the non-measurement target terminal. However, the reason that “the total number of outgoing connections will be smaller than the limit number of connections and will eventually be over-controlled” will be described below.

  According to the prior art, it is assumed that a sufficiently large callable channel (radio resource) is provided for the total number of outgoing connections that actually occur. Specifically, it is assumed that the base station interposed between the terminal and the content server has a sufficiently large number of allowable connections. However, when a large number of terminals try to connect to one base station, connection may not be possible due to physical reasons of radio resources.

The “load factor” and “sample rate” in one base station cell are expressed as follows.
“Load factor” = number of used channels / maximum number of physical channels (1)
“Sample rate” = number of sample calls / number of potential calls (2)
In general, the following equation holds.
"Maximum number of physical channels" ≥ "Number of potential calls" Equation (3)

When equation (3) is solved by equations (1) and (2), it becomes as follows.
(Number of channels used / load factor) ≥ (number of sample calls / sample rate)
(Number of used channels * sample rate) / (number of sample calls) ≥ "load factor"

If the transmission in the base station area is almost a sample call, it can be considered as follows.
Number of channels used / number of sample calls = 1

In such a case, the following formula (4) is established.
“Sample rate” ≧ “Load rate” Equation (4)

  For example, when the sample rate = 10% and the number of sample calls = 1,000 calls, the actual number of outgoing connections = 10,000 calls. If the limit number of connections of the content server = 5,000 calls, control information “50% allowable” is generated.

  However, it is assumed that connections from a large number of terminals are concentrated in some base stations and overflow occurs. At this time, even if “50% is allowed”, there may be a case where only “20%” can be transmitted from the base station due to the limitation on the maximum number of physical channels in the base station cell. . In such a case, the allowable number of connections for each area is smaller than the limit number of connections of the content server, and eventually it is over-controlled.

  FIG. 7 is a sequence diagram in the present invention.

First, the basic sequence will be described.
(S701) The transmission control server 5 sums up the number of area transmission connections for each area actually generated from the terminal, and estimates the total number of transmission connections. Then, the transmission control server 5 determines the allowable number of connections for each area so that the total number of outgoing connections to the content server 2 is equal to or less than the limit number of connections of the content server 2. The allowable number of connections is equal to or less than the limit number of connections of the base station, and the total number of outgoing connections obtained by summing the number of allowable connections in all base stations is equal to or less than the limit number of connections of the content server 2.

(S702) The transmission control server 5 generates control information including the allowable number of connections for each area.
(S703) The transmission control server 5 transmits control information to the broadcast station server 3.
(S704) The broadcast station server 3 broadcasts broadcast data including control information. When the terminal 1 receives broadcast data, the terminal 1 acquires the control information.
(S705) It is assumed that the plurality of terminals 1 are under the control of the base station 6 and the transmission operations from the user occur simultaneously.
(S706) Each terminal 1 starts outgoing connection based on the control information received by the broadcast data. For example, in a place such as an event venue, a large number of terminals try to connect to one base station 6 at the same time. At this time, it is assumed that the base station 6 has been connected for outgoing connection from a number of terminals 1 equal to or greater than the allowable number of connections in the area.
(S707) The plurality of terminals 1 make outgoing connections to the content server 2 via the base station 6. The number of outgoing connections is monitored by the outgoing control server 5. At this time, the transmission control server 5 estimates the number of area transmission connections for each area actually generated from the terminal based on the monitored number of partial transmission connections.

  The basic sequence of S701 to S707 is repeated at regular intervals, for example, every second.

(S708) The transmission control server 5 determines whether or not the estimated number of area transmission connections for all areas exceeds the allowable number of connections in the area.
(S709) Assume that for some areas, the number of outgoing connections exceeds the allowable number of connections in the area. At this time, the transmission control server 5 measures the differential connection number between the area transmission connection number and the allowable connection number in the high congestion area.
(S710) Then, the transmission control server 5 increments and sets the allowable number of connections in a low-congestion area where the number of area transmission connections does not exceed the allowable number of connections. Here, the low congestion area set by incrementing the number of allowable connections is, for example, a peripheral area of the high congestion area. Specifically, the difference connection count is added to the allowable connection count in the low congestion area. In addition, the transmission control server 5 decrements and sets the allowable number of connections in the high congestion area.

(S711) If the estimated number of area outgoing connections does not exceed the allowable number of connections for all areas, the allowable number of connections is returned to the initial setting. Specifically, it returns to the allowable number of connections that can be determined based only on the limit number of outgoing connections of the content server 2.

  Thereafter, the process proceeds to S702. Thus, control information is generated while the allowable number of connections for each area is reset, and transmission control for the terminal is executed.

  As described above in detail, according to the transmission connection control method, the transmission control server, and the program of the present invention, in the communication / broadcasting cooperation system, when outgoing connections exceeding the allowable number of connections occur in some areas. Even if it exists, as a whole system, the total number of outgoing connections can be maintained up to the limit number of connections of the service providing equipment. In particular, when a large number of terminals are simultaneously connected to a specific content server via a single base station, such as in an event venue, they are subordinate to other base stations (for example, located in an area adjacent to a highly congested area). Opportunities for outgoing connections from other terminals can be increased. For a large number of terminals located in a highly congested area, outgoing connections exceeding the allowable number of connections in that area do not reach the service providing facility. It will fit.

  According to the various embodiments of the present invention described above, those skilled in the art can easily make various changes, modifications and omissions within the scope of the technical idea and the viewpoint of the present invention. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

It is a block diagram of the communication broadcasting cooperation system in a prior art. It is a graph of the total number of outgoing connections actually occurring. It is a graph of the total number of outgoing connections for which outgoing control has been performed. It is an area block diagram which controls the number of outgoing connections. It is a graph showing the transmission control in this invention. It is a block diagram of the communication broadcasting cooperation system to which this invention is applied. It is a sequence diagram in the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal 11 Broadcast receiving part 12 Communication interface part 13 Control information acquisition part 14 Transmission control part 2 Content server, service provision facility 3 Broadcast station server 31 Broadcast data storage part 32 Control information addition part 33 Broadcast data transmission part 4 Internet 5 Transmission control Server 51 Outgoing connection number monitoring unit 52 Area outgoing connection number estimating unit 53 Total outgoing connection number estimating unit 54 Allowable connection number setting unit 55 Control information generating unit 56 Control information transmitting unit 6 Base station

Claims (15)

Transmission of the terminal in a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility for receiving a transmission connection from the terminal via the base station A connection control method,
A transmission control server that monitors the number of outgoing connections to the service providing facility;
The outgoing call control server is
A first step of determining an allowable number of connections for each area so that a total number of outgoing connections to the service providing facility is a limit number of connections of the service providing facility;
A second step of estimating the number of area outgoing connections for each area actually occurring from the terminal;
When a highly congested area where the number of area outgoing connections exceeds the allowable number of connections occurs, the number of allowable connections in the low congestion area where the number of area outgoing connections does not exceed the allowable number of connections is incremented and set. A third step;
A fourth step of generating control information including the allowable number of connections for each area;
A fifth step of transmitting the control information to all of the terminals,
The outgoing connection control method, wherein the terminal controls outgoing connection to the service providing facility based on the control information.   The outgoing connection control method according to claim 1, wherein the third step further sets the allowable number of connections in the high congestion area by decrementing. In the third step, the low congestion area set by incrementing the allowable number of connections is:
The peripheral area of the high congestion area,
Next to the high congestion area, the area where the number of area outgoing connections is high, or
3. The outgoing connection control method according to claim 1, wherein the area is a predesignated area.   About a 3rd step, the difference connection number of the said area outgoing connection number in the said high congestion area and the said allowable connection number is measured, and the part of this difference connection number is added to the said allowable connection number in the said low congestion area. The outgoing connection control method according to any one of claims 1 to 3, wherein the outgoing connection control method is set. The system is a communication / broadcasting cooperation system, further comprising a broadcast station server that broadcasts broadcast data,
Regarding the fifth step, the transmission control server transmits the control information to the broadcast station server, the broadcast station server broadcasts the broadcast data including the control information, and the terminal includes the broadcast station server. The transmission connection control method according to any one of claims 1 to 4, wherein the broadcast data is received from and the control information is acquired. For the second step, in order for the transmission control server to estimate the number of area transmission connections for each area,
The control information includes a predetermined ratio value with respect to the total number of terminals,
The terminal compares the ratio value with the eigenvalue of the terminal to determine whether it is a measurement target,
When the terminal that is the measurement target generates a transmission operation, it transmits to the service providing facility together with area information,
The transmission control server measures, for each area, the number of partial outgoing connections from all the terminals that are the measurement targets for the service providing facility,
The outgoing call connection according to any one of claims 1 to 5, wherein the outgoing call control server calculates an area outgoing connection number for each area based on the partial outgoing connection number and the ratio value. Control method.   The outgoing connection control method according to claim 6, wherein the unique value is a random value generated by a random number generation unit or an identification information value unique to the terminal. A transmission further provided in a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility for receiving a transmission connection from the terminal via the base station A control server,
Outgoing connection number monitoring means for monitoring the outgoing connection number for the service providing facility;
Area transmission connection number estimation means for estimating the number of area transmission connections for each area actually occurring from the terminal;
When a highly congested area where the number of area outgoing connections exceeds the allowable number of connections occurs, the number of allowable connections in the low congestion area where the number of area outgoing connections does not exceed the allowable number of connections is incremented and set. An allowable connection number setting means;
Control information generating means for generating control information including the allowable number of connections for each area;
A transmission control server comprising control information transmission means for transmitting the control information to all of the terminals.   The outgoing call control server according to claim 8, wherein the allowable connection number setting means further sets the allowable connection number in the high congestion area by decrementing. The allowable connection number setting means, the low congestion area set by incrementing the allowable connection number,
The peripheral area of the high congestion area,
Next to the high congestion area, the area where the number of area outgoing connections is high, or
The transmission control server according to claim 8 or 9, wherein the transmission control server is an area designated in advance.   The allowable connection number setting means measures a difference connection number between the area outgoing connection number and the allowable connection number in the high congestion area, and sets the difference connection number as the allowable connection number in the low congestion area. The transmission control server according to any one of claims 8 to 10, wherein the transmission control server is set by addition. The system is a communication / broadcasting cooperation system, further comprising a broadcast station server that broadcasts broadcast data,
The transmission control server according to any one of claims 8 to 11, wherein the control information transmission unit transmits the control information to the broadcasting station server. The control information includes a predetermined ratio value with respect to the total number of terminals,
The total outgoing connection number estimating means is:
The terminal compares the ratio value with the eigenvalue of the terminal to determine whether it is a measurement target,
When the terminal that is the measurement target generates a transmission operation, it transmits to the service providing facility together with area information,
The transmission control server measures, for each area, the number of partial outgoing connections from all the terminals that are the measurement targets for the service providing facility,
The transmission control according to any one of claims 8 to 12, wherein the transmission control server calculates the number of area transmission connections for each area based on the number of partial transmission connections and the ratio value. server.   The transmission control server according to claim 13, wherein the unique value is a random value generated by a random number generation unit or an identification information value unique to the terminal. A server further provided in a system having a base station connected to a communication network, a plurality of terminals connected to the base station via radio, and a service providing facility for accepting outgoing connection from the terminal via the base station A transmission control program for causing a computer installed in the computer to function,
Outgoing connection number monitoring means for monitoring the outgoing connection number for the service providing facility;
Area transmission connection number estimation means for estimating the number of area transmission connections for each area actually occurring from the terminal;
When a highly congested area where the number of area outgoing connections exceeds the allowable number of connections occurs, the number of allowable connections in the low congestion area where the number of area outgoing connections does not exceed the allowable number of connections is incremented and set. An allowable connection number setting means;
Control information generating means for generating control information including the allowable number of connections for each area;
A transmission control program for causing a computer to function as control information transmission means for transmitting the control information to all of the terminals.

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