JP5975904B2 - One-to-many communication system, one-to-many communication method and program - Google Patents

Description

  The present invention relates to a one-to-many communication system and a one-to-many communication method and program in the communication field.

  Conventionally, most of the communication is bidirectional communication by the unicast method, but in recent years, a one-way communication service by the one-to-many communication method has been introduced. For example, LTE (Long Term Evolution) has been started as the latest mobile communication system. In this LTE, a service called eMBMS (Evolved Multimedia Broadcast / Multicast Service) by a multicast method can be provided. This eMBMS method has already been standardized by 3GPP as described in Non-Patent Document 1 to Non-Patent Document 6 below, and both unicast communication and eMBMS multicast communication will be used in LTE mobile communication systems. Will do.

http: // www. 3 gpp. org / ftp / Specs / html-info / 23246. htm http: // www. 3 gpp. org / ftp / Specs / html-info / 36300. htm http: // www. 3 gpp. org / ftp / Specs / html-info / 36211. htm http: // www. 3 gpp. org / ftp / Specs / html-info / 36331. htm http: // www. 3 gpp. org / ftp / Specs / html-info / 36440. htm http: // www. 3 gpp. org / ftp / Specs / html-info / 26346. htm

  However, when both unicast communication and one-to-many communication are performed simultaneously, the communication base station needs to allocate transmission capacity to both. Distribution of transmission capacity here means both frequency division and time division. Currently, since most services are unicast communication, base station resources are set to secure transmission capacity so that there is no call loss or delay in unicast communication. To secure enough transmission capacity for one-to-many communication that will be provided in the future, or to set a fixed transmission capacity, the frequency resources for mobile communication that can be used are limited and the transmission capacity of the base station is increased. In order to make it happen, there was a problem that capital investment had to be made.

  Therefore, the present invention has been made in view of the above-mentioned problems, and when performing both unicast communication and one-to-many communication at the same time, the transmission capacity is automatically allocated to both, and installed in the base station. An object of the present invention is to provide a one-to-many communication system, a one-to-many communication method, and a program for suppressing capital investment for increasing the transmission capacity of a base station by effectively utilizing existing frequency resources for mobile communication .

  The present invention proposes the following matters in order to solve the above problems. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

  (1) The present invention relates to a transmission terminal (for example, equivalent to the transmission terminal 100 of FIG. 1), a wireless network device (for example, equivalent to the wireless network device 200 of FIG. 1), and a plurality of base stations (for example, FIG. 1). A base station (corresponding to base stations 310, 320, and 330) in which the wireless network device stores a state of transmission capacity of unicast communication from the past to the present (for example, FIG. 3) and a used capacity acquisition unit (for example, FIG. 3) that acquires the used capacity of unicast communication of the plurality of base stations and records the acquired used capacity of unicast communication in the database. Used capacity acquisition unit 220) and one-to-many communication information receiving means for receiving transmission information of the one-to-many communication from the transmitting terminal (for example, one-to-many communication in FIG. 3) An information receiving unit 240), an estimation means for estimating usable capacity information based on the received one-to-many communication information and data in the database (for example, equivalent to the estimation unit 230 in FIG. 3), Usable capacity information transmitting means for transmitting the usable capacity information to the transmitting terminal (for example, equivalent to the usable capacity information transmitting unit 250 in FIG. 3), and the transmitting terminal to the wireless network device, One-to-many communication information transmitting means for transmitting transmission information related to one-to-many communication (for example, equivalent to the one-to-many communication information transmitting unit 110 in FIG. 2); When the one-to-many communication information is registered together with the capacity to be used and cannot be registered, a registration means (for example, equivalent to the registration unit 140 in FIG. 2) for changing the one-to-many communication information, and the use 1-to-many communication data transmitting means for transmitting one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information (for example, equivalent to the one-to-many communication data transmitting unit 130 in FIG. 2) And a notification means (for example, the notification unit 260 of FIG. 3) that the wireless network device allocates and notifies the corresponding base station based on the registered used capacity and the one-to-many communication information. And one-to-many data receiving means for receiving one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information (for example, FIG. 3). And a distribution means for distributing the received one-to-many communication data for performing one-to-many communication to the corresponding base station for the allocated capacity (for example, the distribution unit 280 in FIG. 3). And the base station has The point-to-multipoint communication system is characterized in that the point-to-multipoint communication data for performing the distributed point-to-multipoint communication is distributed.

  (2) In the one-to-many communication system according to (1), the transmission information of the one-to-many communication includes at least date / time, distribution area, and throughput information, and the wireless network device can be used. The capacity information transmitting means proposes a one-to-many communication system characterized by transmitting usable capacity information to the transmitting terminal before a predetermined period with respect to the distribution date and time.

  (3) In the one-to-many communication system according to (2), the one-to-many communication system is characterized in that the transmission information of the one-to-many communication includes a plurality of transmission dates and times with priority assigned. Has proposed.

  (4) According to the present invention, in the one-to-many communication system of (1) or (2), the database includes at least calendar information, time zone information, and a transmission capacity situation of unicast communication from the past to the present. A one-to-many communication system characterized by storing in association is proposed.

  (5) The present invention relates to the one-to-many communication system of (1) to (4), wherein the database further corresponds to the clicast condition, event information, and the state of transmission capacity of unicast communication from the past to the present. A one-to-many communication system, which is characterized by being added and stored, has been proposed.

  (6) In the present invention, in the one-to-many communication system of (4) or (5), the estimation means performs a weighting operation for each piece of information associated with a transmission capacity of unicast communication from the past to the present. Proposing a one-to-many communication system characterized by estimating a future use capacity that can be used for one-to-many communication based on the transmission capacity obtained and the obtained use capacity of unicast communication Yes.

  (7) The present invention relates to the one-to-many communication system according to (6), wherein the estimation means further adds a capacity margin for unicast communication to estimate a future use capacity that can be used for one-to-many communication. A one-to-many communication system is proposed.

  (8) The present invention relates to the event information in the one-to-many communication system according to (6), wherein the estimation unit performs a weighting operation for each piece of information associated with a transmission capacity of past unicast communication. A one-to-many communication system has been proposed in which weighting coefficients are variably used based on the difference in capacity used depending on the presence or absence of an event.

  (9) The present invention is a one-to-many communication method in a one-to-many communication system including a transmission terminal, a wireless network device, and a plurality of base stations, wherein the wireless network device is a unit from the past to the present. A first step (for example, corresponding to step S110 in FIG. 4) is provided with a database that accumulates the status of transmission capacity of cast communication, and the wireless network device acquires used capacity of unicast communication of the plurality of base stations. A second step (for example, corresponding to step S120 of FIG. 4) in which the wireless network device records the acquired used capacity of unicast communication in the database; On the other hand, a third step (for example, corresponding to step S130 in FIG. 4) for transmitting transmission information related to one-to-many communication; The wireless network device receives the transmission information of the one-to-many communication from the transmitting terminal (for example, corresponding to step S140 in FIG. 4), and the one-to-many communication received by the wireless network device. A fifth step (e.g., corresponding to step S150 of FIG. 4) for estimating usable capacity information based on the information and data in the database; and A sixth step of transmitting capacity information (for example, corresponding to step S160 of FIG. 4), and the transmitting terminal sends the wireless network device to the wireless network device together with a capacity to be used below the usable capacity information and the one-to-many If the communication information is registered and cannot be registered, the one-to-many communication information is changed, and the seventh step (for example, returning to the third step) 4 and step S170), the transmitting terminal notifies the corresponding base station by allocating a capacity based on the registered used capacity and the one-to-many communication information. And the transmission terminal transmits one-to-many communication data for one-to-many communication based on the used capacity and the one-to-many communication information. And the one-to-many communication in which the wireless network device performs one-to-many communication based on the capacity to be used and the one-to-many communication information from the transmitting terminal. A tenth step of receiving data (for example, corresponding to step S200 of FIG. 4), and the base station corresponding to the one-to-many communication data in which the wireless network device performs the received one-to-many communication And an eleventh step (for example, corresponding to step S210 in FIG. 4) for delivering the allocated capacity, and a twelfth for delivering the one-to-many communication data for performing the delivered one-to-many communication. (For example, corresponding to step S220 in FIG. 4), a one-to-many communication method is proposed.

  (10) In the present invention, in the one-to-many communication method of (9), the second step performs a weighting operation for each piece of information associated with a transmission capacity of unicast communication from the past to the present. A one-to-many communication method is proposed in which a future use capacity that can be used for one-to-many communication is estimated based on the obtained transmission capacity and the obtained use capacity of unicast communication.

  (11) In the one-to-many communication method of (9), the present invention provides the event when the second step performs a weighting operation for each piece of information associated with a transmission capacity of past unicast communication. A one-to-many communication method has been proposed in which a weighting factor related to information is variably used based on a difference in capacity used depending on the presence or absence of an event.

  (12) The present invention is a program for causing a computer to execute a one-to-many communication method in a one-to-many communication system including a transmission terminal, a wireless network device, and a plurality of base stations. Comprises a database that accumulates the status of transmission capacity of unicast communication from the past to the present, and the wireless network device acquires a used capacity of unicast communication of the plurality of base stations (for example, a first step (for example, 4), a second step in which the wireless network device records the acquired used capacity of unicast communication in the database (for example, corresponding to step S120 in FIG. 4), and the transmission A third step in which the terminal transmits transmission information regarding one-to-many communication to the wireless network device; For example, corresponding to step S130 in FIG. 4), and a fourth step in which the wireless network device receives the transmission information of the one-to-many communication from the transmitting terminal (for example, corresponding to step S140 in FIG. 4); A fifth step (eg, corresponding to step S150 in FIG. 4) in which the wireless network device estimates usable capacity information based on the received one-to-many communication information and data in the database; A sixth step (for example, corresponding to step S160 in FIG. 4) in which the network device transmits the usable capacity information to the transmitting terminal, and the usable capacity of the transmitting terminal to the wireless network device. The one-to-many communication information is registered together with the capacity to be used below the information, and when the registration cannot be performed, the one-to-many communication information is changed, And a seventh step (for example, corresponding to step S170 in FIG. 4), and the transmission terminal uses the wireless network device registered in the corresponding base station and the used capacity and the one-to-many communication. Based on the information, an eighth step of allocating and notifying the capacity (for example, corresponding to step S180 in FIG. 4), and the transmitting terminal uses the one-to-many based on the capacity to be used and the one-to-many communication information. A ninth step (for example, corresponding to step S190 in FIG. 4) for transmitting one-to-many communication data for communication, and the wireless network device from the transmitting terminal to the capacity to be used and the one-to-many communication information Based on the tenth step of receiving one-to-many communication data for performing one-to-many communication (for example, corresponding to step S200 in FIG. 4), the wireless network device receives the received one-to-one communication An eleventh step (for example, corresponding to step S210 in FIG. 4) of distributing one-to-many communication data for performing multi-communication to the corresponding base station for the allocated capacity, and the base station A program for causing a computer to execute a twelfth step (for example, corresponding to step S220 in FIG. 4) for distributing one-to-many communication data for performing multi-communication is proposed.

  (13) According to the present invention, in the program of (12), the second step is a transmission obtained by performing a weighting operation for each piece of information associated with a transmission capacity of unicast communication from the past to the present. A program has been proposed in which a future use capacity that can be used for one-to-many communication is estimated based on the capacity and the obtained use capacity of unicast communication.

  (14) In the program according to (12), the present invention relates to a weighting factor relating to the event information when the second step performs a weighting operation for each piece of information associated with a transmission capacity of past unicast communication. A program has been proposed in which the program is variably used based on the difference in capacity used depending on the presence or absence of an event.

  According to the present invention, when multicast communication is introduced, transmission of the current base station can be performed by effectively using frequency resources without lowering the transmission capacity of unicast communication currently being performed and causing a decrease in service. It is possible to reduce the capital investment for increasing the capacity and to allocate as much transmission capacity as possible to the multicast communication.

It is a figure which shows the structure of the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the structure of the transmission terminal which concerns on embodiment of this invention. It is a figure which shows the structure of the wireless network apparatus which concerns on embodiment of this invention. It is a figure which shows the process of the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the service registration process in the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the accumulation | storage process of the usage-amount data of the unicast communication in the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the prediction process of the used capacity of the one-to-many communication in the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the process which calculates the candidate of an event variable coefficient about the usage capacity of the one-to-many communication in the one-to-many communication system which concerns on embodiment of this invention. It is a figure which shows the example of a fluctuation | variation of the usage capacity of the unicast communication of a certain day.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

<Outline and configuration of one-to-many communication system>
In general, the transmission capacity of a base station is ensured so as not to cause a call loss or delay in the service as much as possible, assuming the maximum transmission capacity used by unicast communication that changes every moment. However, as shown in FIG. 9, the transmission capacity used by unicast communication fluctuates in the time of the day, and there are many parts where the transmission capacity is not used depending on the time. Therefore, when one-to-many communication is introduced, the transmission capacity set in the base station can be effectively utilized by assigning a transmission capacity that is expected not to be used by unicast communication.

  In view of the above, the one-to-many communication system of the present invention efficiently performs one-to-many communication within a range that does not hinder unicast communication. Note that the communication method of the present invention is similar to multicast communication, and distributes data to an unspecified number of receiving terminals in a Push format. In order to clarify the communication method, here, This communication method is called one-to-many communication.

  As shown in FIG. 1, the one-to-many communication system according to the present embodiment includes a transmission terminal 100, a radio network device 200, a plurality of base stations 310, 320, and 330, and a plurality of reception terminals (not shown). Has been. The transmission terminal 100 may be a mobile terminal such as a smartphone or a mobile phone that is wirelessly connected to the wireless network device 200, or may be a device that is wirelessly connected to the wireless network device 200 such as a personal computer. Also, when a mobile terminal is used as a transmission terminal, the one-to-many communication data is sent from the transmission terminal to a server provided in the wireless network device in advance and stored, and from the server of the wireless network device at that time. You may send it.

The wireless network device 200 of the communication company can obtain the used capacity data of the unicast communication of the plurality of base stations 310, 320, 330. Since the one-to-many communication uses only the downlink, the used capacity data for the future date and time can be predicted by accumulating the used capacity data of the unicast communication downlink in the wireless network device 200 and performing statistical processing. By subtracting this predicted value from the total transmission capacity of the downlink of the base station, the remaining free transmission capacity can be assigned to multicast communication.

In this case, even if it is normally used as an uplink, but may be used adaptively as a downlink, it may be predicted as the total transmission capacity including that line. In this way, one-to-many communication can be serviced using available transmission capacity without securing the transmission capacity of unicast communication and causing service degradation. It becomes possible to do.

<Configuration of transmitting terminal>
As illustrated in FIG. 2, the transmission terminal according to the present embodiment includes a one-to-many communication information transmission unit 110, a one-to-many communication data transmission unit 130, and a registration unit 140.

  Here, the one-to-many communication information transmission unit 110 transmits transmission information related to the one-to-many communication to the wireless network device 200. The one-to-many communication data transmission unit 130 transmits one-to-many communication data for performing one-to-many communication based on the received usable capacity information. The registration unit 140 registers the one-to-many communication information together with the capacity to be used below the usable capacity information in the wireless network device 200, and changes the one-to-many communication information when registration is not possible.

<Configuration of wireless network device>
As illustrated in FIG. 3, the wireless network device according to the present embodiment includes a database 210, a used capacity acquisition unit 220, an estimation unit 230, a one-to-many communication information reception unit 240, and an available capacity information transmission unit 250. A notification unit 260, a one-to-many data reception unit 270, and a distribution unit 280.

  The database 210 stores the state of transmission capacity of unicast communication from the past to the present. The used capacity acquisition unit 220 acquires the used capacity of the plurality of base stations 310, 320, 330 for unicast communication. The estimation unit 230 estimates usable capacity information based on the received one-to-many communication information and data in the database 210.

  The one-to-many communication information receiving unit 240 receives transmission information of one-to-many communication from the transmission terminal 100. The usable capacity information transmission unit 250 transmits usable capacity information to the transmission terminal.

  The notification unit 260 allocates and notifies the corresponding base station based on the registered used capacity and the one-to-many communication information. The one-to-many data receiving unit 270 receives one-to-many communication data for performing one-to-many communication from the transmitting terminal 100 based on the capacity to be used and the one-to-many communication information. The distribution unit 280 distributes the received one-to-many communication data for one-to-many communication to the corresponding base station for the allocated capacity.

  Specifically, a transmission user who provides a service using one-to-many communication uses a one-to-many communication registration input device (not shown) to connect a wireless network via a one-to-many communication registration accepting device (not shown) of a communication company. Register with the device 200. The communication company manages a plurality of services registered in the wireless network device from the transmission user, and sets transmission capacity allocation to the base stations in the registered area in order to perform one-to-many communication of the services. Then, at the date and time when the registered one-to-many communication is performed, the wireless network device 200 is instructed to set the transmission capacity of each base station, and at that date and time, the transmitting user transmits the prepared content to the one-to-many communication The data is transmitted from the data transmission unit 130, and the communication company receives the content at the one-to-many data reception unit 270. The received one-to-many data is communicated one-to-many from a base station related to the area of the wireless communication network.

<Processing of one-to-many communication system>
Processing of the one-to-many communication system according to this embodiment will be described with reference to FIG.

  First, the wireless network device 200 includes a database 210 that stores the status of unicast communication transmission capacity from the past to the present, and acquires the unicast communication usage capacity of a plurality of base stations 310, 320, and 330 (steps). S110), the acquired used capacity of unicast communication is recorded in the database 210 (step S120).

  The transmission terminal 100 transmits transmission information related to one-to-many communication to the wireless network device 200 (step S130), and the wireless network device 200 receives transmission information of one-to-many communication from the transmission terminal 100 (step S130). S140).

  Radio network apparatus 200 estimates usable capacity information based on the received one-to-many communication information and data in database 210 (step S150), and transmits usable capacity information to transmitting terminal 100 (step S150). S160).

  The transmission terminal 100 registers the one-to-many communication information together with the capacity to be used below the usable capacity information in the wireless network device 200. If the transmission terminal 100 cannot register, the one-to-many communication information is changed, and step S130 is performed. (Step S170).

  The radio network apparatus 200 allocates and notifies the corresponding base station of the allocated capacity based on the registered used capacity and the one-to-many communication information (step S180).

  The transmission terminal 100 transmits one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information (step S190), and the wireless network device 200 uses the data from the transmission terminal 100. One-to-many communication data for performing one-to-many communication is received based on the capacity and the one-to-many communication information (step S200).

  The wireless network device 200 distributes the received one-to-many communication data for one-to-many communication to the corresponding base station for the allocated capacity (step S210), and the base stations 310, 320, and 330 are distributed. One-to-many communication data for performing one-to-many communication is distributed (step S220).

  With reference to FIG. 5, processing related to service registration for one-to-many communication will be described.

First, a transmission user uses a one-to-many communication registration input device, for example, “month and day”, “time”, “area”, one-to-many communication before a set registration deadline such as several days or hours. “Throughput” is input to the one-to-many communication registration receiving apparatus (step S310). The sending user can register a one-to-many communication service within a range not exceeding the transmission capacity that can be used for one-to-many communication (steps S320 to S340). The registration of the sending user's one-to-many communication is basically not accepted when the previously registered service has priority and the transmission capacity of the one-to-many communication has been exhausted.

However, if a public organization must urgently make a one-to-many communication due to a disaster, etc., the service registered earlier may be deleted without being sent at the date and time, but this is communicated with the sending user. This is a matter determined by contracts and operations between vendors.

As mentioned above, transmission users of one-to-many communication are not limited to specific corporations such as broadcasting stations, but general communication users can freely provide services like telephones, e-mails, and Web postings. Basically, it is possible to register contents and transmit contents. On the other hand, since it is assumed that one-to-many communication is used against slander and public order and morals, in order to prevent this, the sending user and the communication company make a contract on the content in advance and are certified like an official website In some cases, registration is possible.

  As illustrated in FIG. 6, the wireless network device 200 obtains data per unit time of the transmission capacity used in the unicast communication of each base station (step S410). For every fixed unit time, every 1 to 30 minutes can be considered in consideration of the speed of fluctuation of the used capacity.

  The metadata of the category of the calendar classification such as “time” in the day, “day of the week” including holidays and holidays, and “month” related to the season are added to the acquired past data. The capacity used varies depending on each of these categories. Past data to which metadata is added is stored in the wireless network device (step S420).

  Then, the wireless network device predicts the used capacity for the future date and time. Therefore, as shown in FIG. 7, a plurality of past data extracted based on this category that coincides with the predicted date and time is subjected to statistical processing and a predicted value is output.

  Specifically, first, the date / time to be predicted is specified, and the date / time to be predicted is classified into categories of time, day of the week, and month. Then, past data that matches or resembles the category is extracted, and statistical processing is performed based on the extracted past data.

  In addition to the above-described calendar classification category, a category that affects the predicted value of the used capacity data for unicast communication may be added. In other words, the usage capacity of unicast communication has different characteristics depending on the weather forecast of the date and time to be predicted or events such as festivals, fireworks festivals, concerts, etc., and is a category different from the calendar classification.

  These categories are also given as metadata to the used capacity data in the wireless network device. Further, when using these categories, future weekly weather forecasts and event schedules are automatically obtained from the Web or the like, and the schedules of the categories related to the predicted date and time are extracted. As a method for automatically extracting schedules in these categories from Web information, many information extraction tools using natural language processing technology for analyzing texts on the Web have already been developed.

  Further, when the past used capacity data is predicted by statistical processing, category weighting may be performed and a plurality of data may be weighted averaged. For example, assuming that there are n past used capacity data that match for a certain time and day of the week, the predicted value P (x, t, w) is expressed by the following equation (1).

  Here, t is a time, w is a day of the week, and x is a past used capacity to which each category is assigned. Further, a, b, c, d, and e are coefficients for weighting categories such as month, year, weather, event 1 and event 2, respectively, and the total value of the coefficients is 1.

  For example, assuming that there are n pieces of data that coincide with Saturday at 18:00, for data with different months and years, the weight of the coefficient is increased for the closer months and years. Further, if the weather or event of the predicted date and time is statistically shown to have a large influence on the used capacity, the weight is increased. In this way, the predicted value is calculated by the weighted average of the categories. It should be noted that in order to extract past used capacity data, elements that match may be included only in the time, or up to the month in addition to the time and day of the week.

  In the above, the coefficient of Equation 1 may be variable. This is because the coefficient used for comparing the estimated used capacity with the actual used capacity is always close to the actual used capacity. By comparing the actual capacity used when there are events such as fireworks, festivals, concerts, etc. with the absence of events, the weighting of those events can be corrected and the future prediction accuracy can be improved.

  Specifically, as shown in FIG. 8, as the matching condition of the used capacity data, the time t and day of the week to be predicted are set, the variable coefficient of month m is fixed, and there is no event, that is, the event variable coefficient is set to 0. As shown in FIG. On the other hand, it is set as an event variable coefficient candidate so that the difference between the actual used capacity and the predicted used capacity when an event occurs is minimized. In this case, the weighting coefficient of each category is normalized so that the sum of the variable coefficients becomes 1.

  In order to set a new event variable coefficient to be used in the future, for example, as shown in Equation 2, the event variable coefficient candidates and the event variable coefficients obtained so far are calculated as weighted average values. .

Further, since the actual usage amount of unicast communication varies with respect to the predicted usage amount obtained by the calculation, a deviation obtained by statistically processing the variation may be added as a certain margin. In this way, capacity allocation can be sufficient for fluctuating unicast communications, and the probability of service degradation can be reduced.

  Further, the area for one-to-many communication can be set in various areas such as a small town, a municipality, a prefecture, and the whole country by variously grouping base stations deployed throughout the country. This makes it possible to provide a Push distribution service form that could not be achieved by communication or broadcasting so far, such as “only in cities where there are chain stores nationwide”.

  In those areas, it is necessary to set the same transmission capacity distribution for point-to-multipoint communication to a plurality of grouped base stations. Therefore, the predicted value of the used capacity of unicast communication in the base station related to the area uses the maximum value among the predicted values of all base stations used for one-to-many communication. In this way, a sufficient transmission capacity for unicast communication is ensured, and service degradation is reduced.

  Further, in the one-to-many communication using LTE eMBMS, a technology for improving reception quality in the area using SFN (single frequency network) is used. When one-to-many communication is performed in the area using SFN, a base station outside the area may use a sector in which transmission radio waves are directed to the area. Therefore, it is necessary to predict the usage capacity predicted for unicast communication as the maximum value of all base stations including the sector of the base station used for these one-to-many communication.

  In addition, although the maximum value is set here among all the base stations related to one-to-many communication, there is a case where nearby base stations complement each other in transmission capacity, so that a decrease in unicast communication service is allowed. Within a possible range, it is also possible to use a low value or an average value multiplied by a certain ratio instead of the maximum value of all the related base stations.

  The processing of the one-to-many communication system is recorded on a recording medium that can be read by the computer system, and the program recorded on the recording medium is read by the transmission terminal and the wireless network device and executed. Multiple communication systems can be realized. The computer system here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention.

  In the field of wireless communication, not only conventional unicast bidirectional communication but also unidirectional communication services such as eMBMS using a one-to-many communication scheme are being introduced. The fixed allocation of these capacities requires capital investment to secure extra resources. In order to prevent economic waste, it is required to use up radio waves sufficiently with minimal resources. There is a high possibility that the present invention will be used when introducing a one-to-many communication, which is a new service, without degrading the service of unicast communication.

DESCRIPTION OF SYMBOLS 100; Transmission terminal 110; One-to-many communication information transmission part 130; One-to-many communication data transmission part 140; Registration part 200; Wireless network apparatus 210; Database 220; Usage capacity acquisition part 230; Estimation part 240; Information receiving unit 250; Usable capacity information transmitting unit 260; Notification unit 270; One-to-many data receiving unit 280; Distribution unit 310; Multiple base stations 320; Multiple base stations 330;

Claims (14)

A one-to-many communication system comprising a transmission terminal, a wireless network device, and a plurality of base stations,
The wireless network device is
A database that accumulates the status of unicast transmission capacity from the past to the present,
A used capacity acquisition means for acquiring a used capacity of unicast communication of the plurality of base stations and recording the acquired used capacity of unicast communication in the database;
One-to-many communication information receiving means for receiving transmission information of the one-to-many communication from the transmitting terminal;
Estimating means for estimating usable capacity information based on the received one-to-many communication information and data in the database;
Usable capacity information transmitting means for transmitting the usable capacity information to the transmitting terminal;
The transmitting terminal is
One-to-many communication information transmitting means for transmitting transmission information related to one-to-many communication to the wireless network device;
Registering the one-to-many communication information together with a capacity to be used below the usable capacity information in the wireless network device, and a registration unit for changing the one-to-many communication information when registration is not possible,
One-to-many communication data transmitting means for transmitting one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information;
With
The wireless network device is
Notification means for allocating and notifying the corresponding base station based on the registered used capacity and the one-to-many communication information;
One-to-many data receiving means for receiving one-to-many communication data for performing one-to-many communication based on the capacity to be used and one-to-many communication information from the transmitting terminal;
Distribution means for distributing the received one-to-many communication data for performing one-to-many communication to a corresponding base station for the allocated capacity;
With
The one-to-many communication system, wherein the base station distributes the distributed one-to-many communication data for performing one-to-many communication.   The transmission information of the one-to-many communication includes at least information on date / time, distribution area, and throughput, and the usable capacity information transmission unit of the wireless network device uses a predetermined period before the distribution date / time. The one-to-many communication system according to claim 1, wherein possible capacity information is transmitted to the transmitting terminal.   The one-to-many communication system according to claim 2, wherein the transmission information of the one-to-many communication includes a plurality of desired transmission dates and times with priorities.   3. The pair according to claim 1, wherein the database stores at least calendar information, time zone information, and a state of transmission capacity of unicast communication from the past to the present in association with each other. Multi-communication system. 5. The one-to-many communication system according to claim 4 , wherein the database further stores climatic conditions, event information, and the transmission capacity status of unicast communication from the past to the present in association with each other.   The estimation means is based on the transmission capacity obtained by performing a weighting operation for each piece of information associated with the transmission capacity of the unicast communication from the past to the present and the used capacity of the acquired unicast communication, 6. The one-to-many communication system according to claim 4 or 5, wherein a future use capacity that can be used for one-to-many communication is estimated.   7. The point-to-multipoint communication system according to claim 6, wherein the estimation unit further estimates a future use capacity that can be used for point-to-multipoint communication by adding a capacity margin for unicast communication.   The estimation means may vary a weighting factor related to the event information when performing a weighting operation for each piece of information associated with a transmission capacity of past unicast communication based on a difference in capacity used depending on the presence or absence of an event. The one-to-many communication system according to claim 6, wherein the one-to-many communication system is used. A one-to-many communication method in a one-to-many communication system comprising a transmitting terminal, a wireless network device, and a plurality of base stations,
The wireless network device comprises a database for storing the status of transmission capacity of unicast communication from the past to the present,
A first step in which the wireless network device acquires a used capacity of unicast communication of the plurality of base stations;
A second step in which the wireless network device records the acquired used capacity of unicast communication in the database;
A third step in which the transmission terminal transmits transmission information regarding one-to-many communication to the wireless network device;
A fourth step in which the wireless network device receives the transmission information of the one-to-many communication from the transmission terminal;
A fifth step in which the wireless network device estimates usable capacity information based on the received one-to-many communication information and data in the database;
A sixth step in which the wireless network device transmits the usable capacity information to the transmitting terminal;
The transmission terminal registers the one-to-many communication information together with the capacity to be used below the usable capacity information in the wireless network device. If the transmission terminal cannot register, change the one-to-many communication information. A seventh step returning to the third step;
An eighth step in which the wireless network device allocates and notifies the corresponding base station of the capacity based on the registered capacity to be used and the one-to-many communication information;
A ninth step in which the transmitting terminal transmits one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information;
A tenth step in which the wireless network device receives, from the transmitting terminal, one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information;
An eleventh step in which the wireless network device distributes the received one-to-many communication data for performing one-to-many communication to a corresponding base station for the allocated capacity;
A twelfth step in which the base station distributes the distributed one-to-many communication data for performing the one-to-many communication;
A one-to-many communication method.   In the second step, based on the transmission capacity obtained by performing a weighting operation for each piece of information associated with the transmission capacity of the unicast communication from the past to the present, and the acquired used capacity of the unicast communication The one-to-many communication method according to claim 9, wherein a future use capacity that can be used for one-to-many communication is estimated.   In the second step, the weighting factor related to the event information when performing the weighting calculation for each piece of information associated with the transmission capacity of the past unicast communication is variable based on the difference in the used capacity depending on the presence or absence of an event. The one-to-many communication method according to claim 9, wherein the one-to-many communication method is used. A program for causing a computer to execute a one-to-many communication method in a one-to-many communication system including a transmission terminal, a wireless network device, and a plurality of base stations,
The wireless network device comprises a database for storing the status of transmission capacity of unicast communication from the past to the present,
A first step in which the wireless network device acquires a used capacity of unicast communication of the plurality of base stations;
A second step in which the wireless network device records the acquired used capacity of unicast communication in the database;
A third step in which the transmission terminal transmits transmission information regarding one-to-many communication to the wireless network device;
A fourth step in which the wireless network device receives the transmission information of the one-to-many communication from the transmission terminal;
A fifth step in which the wireless network device estimates usable capacity information based on the received one-to-many communication information and data in the database;
A sixth step in which the wireless network device transmits the usable capacity information to the transmitting terminal;
The transmission terminal registers the one-to-many communication information together with the capacity to be used below the usable capacity information in the wireless network device. If the transmission terminal cannot register, change the one-to-many communication information. A seventh step returning to the third step;
An eighth step in which the wireless network device allocates and notifies the corresponding base station of the capacity based on the registered capacity to be used and the one-to-many communication information;
A ninth step in which the transmitting terminal transmits one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information;
A tenth step in which the wireless network device receives, from the transmitting terminal, one-to-many communication data for performing one-to-many communication based on the capacity to be used and the one-to-many communication information;
An eleventh step in which the wireless network device distributes the received one-to-many communication data for performing one-to-many communication to a corresponding base station for the allocated capacity;
A twelfth step in which the base station distributes the distributed one-to-many communication data for performing the one-to-many communication;
A program that causes a computer to execute.   In the second step, based on the transmission capacity obtained by performing a weighting operation for each piece of information associated with the transmission capacity of the unicast communication from the past to the present, and the acquired used capacity of the unicast communication 13. The program according to claim 12, wherein a future use capacity that can be used for one-to-many communication is estimated.   In the second step, the weighting factor related to the event information when performing the weighting calculation for each piece of information associated with the transmission capacity of the past unicast communication is variable based on the difference in the used capacity depending on the presence or absence of an event. The program according to claim 12, wherein the program is used as a program.

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