JP2013165410A - Communication system, mobile radio communication terminal, communication program, storage medium, and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system, a mobile radio communication terminal, a communication program, a storage medium, and a communication method capable of improving communication speed and communication reliability.SOLUTION: A communication system 1 comprises: division means 201 for dividing a file into a plurality of division files; queue creation means 202; enqueue means 203; dequeue means 205 for performing dequeue of the plurality of enqueued division files in parallel by the number of parallel dequeue depending on a bandwidth of a queue, where the number of parallel dequeue is a quotient obtained by dividing a bandwidth of a communication line by the bandwidth of the queue; and restoration means 306 for restoring the file from the plurality of dequeued division files.

Description

  The present invention relates to a communication system, a mobile radio communication terminal, a communication program, a storage medium, and a communication method, and more particularly to a communication system, a mobile radio communication terminal, a communication program, a storage medium, and a communication method using a queuing system.

  A conventional wireless communication system is mainly based on QoS (Quality of Service) control between a client computer (hereinafter referred to as “client”) and a server computer (hereinafter referred to as “server”). (1) Identification processing, (2) Enqueue processing, (3) Schedule processing, (4) Dequeue processing, and (5) Reception processing are performed.

  (1) In the identification process, for example, the client refers to an IP address, a MAC (Media Access Control) address, and a ToS (Type of Service) field, and classifies (identifies) packets relating to a file to be transmitted (for example, upload) into each flow. )

  (2) In the enqueue process, for example, the client suitably generates and enqueues a queue according to the identified flow number.

  (3) In the scheduling process, for example, the client calculates (schedules) the order and timing of dequeuing the first packet of each queue according to the priority, bandwidth, packet length, queuing time, etc. of each queue.

  (4) In the dequeue process, for example, the client dequeues the head packet of each queue according to the schedule process. The dequeued packet is transmitted (uploaded) from the client to the server via the Internet, for example.

  (5) In the reception process, for example, the server receives all the dequeued packets and restores the file from all the packets.

  Further, in the conventional wireless communication system, in order to effectively use the bandwidth of the wireless communication line T, the bandwidth of the queue Q1 is the fixed bandwidth shown in FIG. 9 and FIG. 10, the variable band is set.

JP 2003-324471 A

  However, in the conventional wireless communication system, as shown in FIG. 8, when the bandwidth of the queue Q1 is fixed, the bandwidth of the queue Q1 is fixed even if the bandwidth of the wireless communication line T is expanded. There was a problem that an increase in speed could not be expected. Further, as shown in FIGS. 9 and 10, when the bandwidth of the queue Q1 is varied in accordance with the increase or decrease of the bandwidth of the wireless communication line T, an extra processing time is required for varying the bandwidth of the queue Q1. Therefore, there is a problem that a variable delay occurs. That is, there is a problem that the bandwidth of the wireless communication line T that is easily increased or decreased cannot be effectively used regardless of whether the bandwidth of the queue Q1 is a fixed bandwidth or a variable bandwidth.

  In particular, in a mobile communication system composed of a mobile radio communication terminal (client) and a server, the connection state of the mobile communication line is always unstable and the fluctuation range of the bandwidth is large. For this reason, when the number of queues Q1 of packets to be dequeued is limited to one instead of a plurality, and the bandwidth of the queue Q1 is a variable bandwidth, the variable bandwidth of the queue Q1 is half the bandwidth of the mobile communication line. Limiting to the extent is also necessary to maintain the communication reliability of the mobile radio communication terminal. As a result, there is a problem that a significant transmission delay occurs in a mobile radio communication terminal as compared with a radio communication system in which a radio communication terminal that is not a mobile radio communication terminal is a client.

  Further, in the wireless communication system, when the connection state of the communication line is unstable, connection and disconnection of the wireless communication line T may be repeated. If the wireless communication line T is disconnected during transmission of the packets a1, a2,... Shown in FIG. 8 or 9, even if the transmission of the packets a1, a2,. Since all the packets a1, a2,..., An1 must be retransmitted from the packet a1, a transmission delay occurs in the conventional method using only packet communication as described above.

  In the wireless communication system, since it is not possible to confirm reception of the packets a1, a2,..., The packets a1, a2,. Therefore, it cannot be confirmed whether all the packets a1, a2,... Are correctly received, and the conventional method using only packet communication lacks communication reliability.

  Therefore, the present invention has been made in view of these points, and it is an object of the present invention to provide a communication system, a mobile radio communication terminal, a communication program, a storage medium, and a communication method that can at least improve the communication speed. It is aimed.

  (1) The present invention provides a dividing means for dividing a file into a plurality of divided files or dividing a file into a plurality of divided files and then dividing the divided file into a plurality of packets, and a bandwidth less than the communication line bandwidth A queue generating means for generating a plurality of queues set to the bandwidth of the file, an enqueue means for enqueuing the divided files or packets into the queue, and a plurality of the enqueued divided files or packets in parallel according to the bandwidth of the communication line. A communication system comprising: a dequeue unit that dequeues in parallel by the number of dequeues; and a restore unit that restores a file from a plurality of dequeued divided files or packets.

  (2) The communication system is based on storage means for storing files or packets and queues, confirmation means for confirming a transmission / reception result for each divided file by flag management, and reception failure information of the divided file obtained from the confirmation means. The dequeue unit re-dequeues the reception failure divided file or the packet related to the division file, and the reception successful division file or the division file from the storage unit based on the reception success information of the division file obtained from the confirmation unit It is preferable to further comprise retransmission means for erasing the packet according to.

  (3) The communication system causes the dequeue means to dequeue each one divided file related to one or a plurality of files selected from the plurality of files by the number of parallel dequeues or a packet related to the divided file. It is preferable to further comprise.

  (4) The communication system causes the dequeue means to dequeue one or a plurality of divided files selected from the plurality of divided files related to one file by the number of parallel dequeues or a packet related to the divided files. It is preferable to further comprise.

  (5) The data amount of the divided file is preferably a fixed value that is 100% or less of the data transfer amount that the communication line can transfer per second.

  (6) It is preferable that the queue generating means sets a quotient obtained by dividing the bandwidth of the communication line by the bandwidth of the queue as the number of parallel dequeues.

  (7) Preferably, the queue generation means determines the bandwidth of the queue so that the bandwidth of the queue is equal to or greater than a predetermined bandwidth.

  (8) The present invention also relates to a dividing means for dividing a file into a plurality of divided files, or dividing a file into a plurality of divided files and further dividing the divided file into a plurality of packets, and a mobile radio communication line A queue generating means for generating a plurality of queues set to a bandwidth equal to or less than the bandwidth of the network, an enqueue means for enqueuing a divided file or packet into the queue, and a plurality of the enqueued divided files or packets of the mobile radio communication line. A mobile radio communication terminal comprising: a dequeue unit that dequeues in parallel by the number of parallel dequeues corresponding to a bandwidth.

  (9) Further, the present invention provides a dividing means for dividing a file into a plurality of divided files, or dividing a file into a plurality of divided files and then dividing the divided file into a plurality of packets, and a bandwidth of a communication line Queue generation means for generating a plurality of queues set to a bandwidth equal to or less than the width, enqueue means for enqueuing a divided file or packet in the queue, and a plurality of enqueued divided files or packets according to the bandwidth of the communication line A communication program for causing a computer to function as dequeue means for dequeuing in parallel by the number of parallel dequeues.

  (10) Moreover, this invention is a storage medium which memorize | stores said communication program.

  (11) The present invention also provides a dividing step of dividing a file into a plurality of divided files, or dividing a file into a plurality of divided files and then dividing the divided file into a plurality of packets, and a bandwidth of a communication line A queue generation step for generating a plurality of queues set to a bandwidth equal to or less than the bandwidth, an enqueue step for enqueuing a divided file or packet into the queue, and a plurality of enqueued divided files or packets according to the bandwidth of the communication line And a dequeuing step for dequeuing in parallel by the number of parallel dequeues.

  According to the communication system, mobile radio communication terminal, communication program, storage medium, and communication method of the present invention, it is possible to at least improve the communication speed.

FIG. 1 is a block diagram showing a client in a communication system according to an embodiment of the present invention. FIG. 2 is a block diagram showing a server in the communication system of the present embodiment. FIG. 3 is a conceptual diagram illustrating an example of the enqueue process and the dequeue process according to the present embodiment. FIG. 4 is a conceptual diagram illustrating another example of the enqueue process and the dequeue process according to the present embodiment. FIG. 5 is a flowchart illustrating an example of a processing flow in the client. FIG. 6 is a flowchart illustrating an example of a process flow in the server. FIG. 7 is a conceptual diagram showing a state in which the bandwidth of the communication line has rapidly decreased in the communication system of the present embodiment. FIG. 8 is a conceptual diagram showing an example when the bandwidth of a queue is a fixed bandwidth in a conventional wireless communication system. FIG. 9 is a conceptual diagram showing an example when the bandwidth of a queue is a variable bandwidth in a conventional wireless communication system. FIG. 10 is a conceptual diagram showing an example when the bandwidth of the communication line of FIG. 9 is reduced.

  Hereinafter, an embodiment of the present invention will be described.

[Configuration of Communication System 1]
First, the communication system 1 of this embodiment is demonstrated. FIG. 1 is a block diagram showing a client 2 in the communication system 1 of the present embodiment. FIG. 2 is a block diagram showing the server 3 in the communication system 1 of the present embodiment.

  As shown in FIGS. 1 and 2, the communication system 1 of the present embodiment includes a client 2 and a server 3 that are connected to each other via a computer network CN.

  The client 2 and the server 3 each have general components as a computer such as a central processing unit, a storage device, an input / output device, and a communication device (not shown) in order to perform the functions of the computer individually.

  The client 2 as the mobile wireless communication terminal according to the present embodiment installs the communication program according to the present embodiment that can be acquired from the server 3 or the storage medium 5 such as a USB memory, so that a plurality of divided files are paralleled according to the bandwidth. Dequeuing function is demonstrated. Further, the server 3 of the present embodiment exhibits a function of restoring the divided file by installing a program using Web / API, for example. Thus, the communication method 1 according to the present embodiment performs communication after dividing a file into divided files at least on the upstream side of the wireless communication line T (the transmission side of the client 2 with respect to the server 3). Is realized. In other words, the communication system 1 of the present embodiment does not make packet communication an essential communication method at least on the upstream side of the wireless communication line T.

[Configuration of client (mobile radio communication terminal) 2]
The client 2 of the present embodiment is a mobile wireless communication terminal such as a smartphone that uses a 3G (third generation) line. Examples of the other client 2 include a desktop computer, a laptop computer, a tablet computer, and an Internet-compatible TV receiver.

  As shown in FIG. 1, the client 2 according to the present embodiment includes a dividing unit 201, a queue generating unit 202, an enqueue unit 203, a storage unit 204, a dequeue unit 205, a restoration unit 206, and a confirmation unit 207. , Retransmission means 208, and scheduling means 209.

  However, when conventional packet communication is performed on the downstream side of the wireless communication line T (the reception side of the client 2 with respect to the server 3) by a method other than the communication method of the present embodiment, the client 2 of the present embodiment uses the restoration unit 206. It is not necessary to have.

(Division means 201)
The dividing unit 201 divides the file acquired from the file generating unit 210 into a plurality of divided files.

  Here, the data amount of the divided file is preferably a fixed value of 100% or less of the data transfer amount that can be transferred by the wireless communication line T per second, and a fixed value of 10% to 50% of the data transfer amount. It is more preferable that In principle, the data amount of the divided file of this embodiment is fixed at 50 kb. However, the last divided data amount is 50 kb or less.

  The dividing unit 201 notifies the server 3 of a transmission declaration either before or after the dividing process. The transmission declaration mainly includes a report on the number of divided files and the amount of data, and a request for a transmission ID.

  When the client 2 receives the transmission ID from the server 3, the dividing unit 201 assigns header information including the address of the server 3, the transmission ID, the division identification number, and the data amount of the divided file to each divided file.

  In another embodiment, the “divided file” in the present embodiment can be changed to “a plurality of packets obtained by further dividing the divided file”. Details will be described after the description of the present embodiment.

(Queue generation means 202)
The queue generation unit 202 generates a plurality of queues. The bandwidth of the queue is equal to or less than the bandwidth of the wireless communication line T.

  Here, the queue generating means 202 determines the bandwidth of the queue so that the quotient (so-called division answer) obtained by dividing the bandwidth of the wireless communication line T by the bandwidth of the queue is 2 or more. The value of the quotient is the number of parallel dequeues described later. Further, as the remainder (remainder of division) related to the quotient approaches 0, the bandwidth of the wireless communication line T and the total bandwidth obtained by adding the bandwidths of all the queues become equal.

  Further, in order to secure the minimum guaranteed bandwidth of the queue, the queue generation unit 202 preferably determines the queue bandwidth so that the queue bandwidth is equal to or greater than a predetermined bandwidth. In consideration of the data amount of the divided file, the predetermined bandwidth is preferably 10% to 20% of the bandwidth of the wireless communication line T.

(Enqueue means 203)
The enqueue unit 203 enqueues the divided file into a queue. When performing the enqueue process, information such as the priority of the queue, the transmission ratio of the divided files in each queue, and the maximum transmission delay time may be added.

  Hereinafter, an example of the enqueue process will be described. 3 and 4 are conceptual diagrams illustrating an example of the enqueue process and the dequeue process.

As shown in FIG. 3, the enqueue unit 203 performs the divided file (for example, divided files A1, A2, A3,..., An) on the same file (for example, file A) with respect to the same queue (for example, queue Q1). ₁ (n _{1 to} n ₄ are arbitrary integers)) can be enqueued.

  Further, as shown in FIG. 4, the enqueue unit 203 includes a plurality of divided files (for example, divided files A1 to A5) related to a high priority file (for example, the file A) in the head of each queue (for example, the queues Q1 to Q3). The plurality of divided files can be enqueued so as to be preferentially arranged.

(Storage means 204)
As shown in FIG. 1, the storage unit 204 is a frame memory, for example, and stores files and queues. The file includes various data including a file and a divided file. Queues also include activated queues (enqueued queues) and non-activated queues.

  The storage unit 204 also stores various information such as the data amount of the divided file, the queue bandwidth, the transmission address, the transmission ID, the queue priority, and the processing method.

(Dequeueing means 205)
The dequeue unit 205 dequeues the files stored in the storage unit 204 and a plurality of divided files enqueued from the queue in parallel by the number of parallel dequeues corresponding to the bandwidth of the wireless communication line T. As described above, the number of parallel dequeues is a quotient obtained by dividing the bandwidth of the wireless communication line T by the bandwidth of the queue.

  Here, the number of parallel dequeues is preferably 2-5. This is because, as described above, the data amount of the divided file is preferably a fixed value of 10% to 50% of the data transfer amount that the wireless communication line T can transfer per second.

  The dequeued divided file is transmitted from the client 2 to the server 3 via the computer network CN by the wireless communication unit 211.

(Restoration means 206)
The restoration unit 206 restores a file from a plurality of divided files dequeued from the server 3 to the client 2 based on the header information given to each divided file. On the other hand, the plurality of divided files dequeued from the client 2 to the server 3 are restored to files in the server 3.

(Confirming means 207)
The confirmation unit 207 confirms the transmission / reception result for each divided file by flag management.

(Resending means 208)
The re-sending means 208 causes the dequeue means 205 to re-dequeue the reception failure division file based on the reception failure information of the division file. The division file reception failure information is acquired from flag management in the confirmation unit 207.

  In addition, the retransmission unit 208 deletes the divided file of the reception success copied from the storage unit 204 from the storage unit 204 based on the reception success information of the divided file. Similarly to the above, the division file reception success information is obtained from flag management in the confirmation unit 207.

(Schedule means 209)
The schedule unit 209 manages the dequeue order and timing of the divided files to be dequeued. Based on this schedule management, the dequeue unit 205 sequentially dequeues the divided files.

  Here, an example of schedule management is shown in FIGS. As shown in FIG. 3, the scheduling means 209 is configured to select three (plural) files A, selected from the plurality of files A, B, C, D by the number of parallel dequeues (three in FIG. 3). Each of the divided files A1, B1, and C1 related to B and C is sequentially dequeued by the dequeue unit 205 as the first divided file. Since the bandwidth of the wireless communication line T varies, when the number of parallel dequeues is 1, the number of selected files is also one (for example, only file A).

  Further, as shown in FIG. 4, for example, the scheduling unit 209 has a parallel dequeue number (three in FIG. 4) among a plurality of divided files A1, A2, A3,. ) The three (a plurality of) divided files A1, A2, and A3 selected by the amount are sequentially dequeued by the dequeue means 205 as the first divided file. As described above, since the bandwidth of the wireless communication line T varies, when the number of parallel dequeues is 1, the number of divided files to be selected is one (for example, only the divided file A1).

[Configuration of Server 3]
The server 3 of this embodiment is an Internet server, for example. As shown in FIG. 2, the server 3 is similar to the client 2 of the present embodiment. The server 3 includes a dividing unit 301, a queue generating unit 302, an enqueue unit 303, a storage unit 304, a dequeue unit 305, and a restoration unit 306. A confirmation unit 307, a retransmission unit 308, and a schedule unit 309.

  However, when conventional packet communication is performed on the downstream side of the wireless communication line T (the reception side of the client 2 with respect to the server 3) by a method other than the communication method of the present embodiment, the server 3 of the present embodiment includes a dividing unit. There is no need.

[Supplementary explanation about client 2 and server 3]
In addition, about the point which is not mentioned by description of the structure of the client 2 and the server 3, the structure and technique of the client 2 and the server 3 which utilize packet communication are diverted.

[Processing Flow in Communication System 1]
Next, the flow of processing in the communication system 1 of the present embodiment will be described.

  First, the flow of processing in the client 2 of this embodiment will be described. FIG. 5 is a flowchart illustrating an example of a processing flow in the client 2 of the present embodiment.

  (1) When the user of the client 2 inputs a command for transmitting the file stored in the client 2 to the server 3, the dividing unit 201 divides the file into a plurality of divided files (S201). The data amount of the divided file is set to a predetermined fixed value.

  (2) When the divided file is created, the dividing unit 201 transmits a transmission declaration to the server 3 via the wireless communication unit 211 (S202).

  (3) When the transmission ID is sent from the server 3 that has received the transmission declaration, the dividing unit 201 acquires the transmission ID via the wireless communication unit 211 (S203).

  (4) The dividing unit 201 that has acquired the transmission ID gives header information including the transmission ID and the like to all the divided files (S204).

  (5) The wireless communication unit 211 measures the bandwidth of the wireless communication line T until the header information is added to the divided file (S205). The measurement result is preferably an average bandwidth of the wireless communication line T within a predetermined time.

  (6) After the measurement of the bandwidth of the wireless communication line T is completed, the queue generating unit 202 generates a plurality of queues (S206). The bandwidth of the queue is preferably 10% to 50% of the bandwidth of the wireless communication line T.

  (7) When the bandwidth of the queue is determined, the dequeue unit 205 determines the number of parallel dequeues (S207). The number of parallel dequeues is equal to the quotient obtained by dividing the bandwidth of the wireless communication line T by the bandwidth of the queue.

  (8) When the queue is generated, the enqueue unit 203 enqueues the divided file into the queue (S208). An example of the enqueue process differs depending on various conditions such as file priority as shown in FIGS.

  (9) When the enqueue process is started, the dequeue unit 205 checks whether an untransmitted divided file (enqueued divided file) is stored in the storage unit 204 (S209).

  (10) When unsent divided files are stored in the storage unit 204, the dequeue unit 205 dequeues the enqueued divided files in parallel by the number of parallel dequeues (S209 “Yes” → S210). The schedule management of the dequeue process shown in FIGS. 3 and 4 is controlled by the schedule unit 209. For example, taking FIG. 3 as an example, if the number of parallel dequeues is 3, the three enqueued head divided files A1, B1, and C1 are dequeued in parallel. However, if the three divided files are dequeued in parallel, the three divided files may be dequeued with a slight shift.

  (11) When the wireless communication unit 211 completes transmission of the divided file after the dequeue unit 205 dequeues the divided file, the confirmation unit 207 changes the transmission flag of the transmitted divided file from “False” to “True”. (S211). For example, taking FIG. 3 as an example, when the transmission of the three first divided files A1, B1, and C1 is completed, the confirmation unit 207 changes the transmission flags for the divided files A1, B1, and C1 from “False” to “ Change to “True”.

  (12) After the wireless communication unit 211 completes the transmission of the divided file, the wireless communication unit 211 confirms whether or not a reception notification notified from the server 3 is received for the divided file (S212).

  (13) When the wireless communication unit 211 receives the reception notification, the confirmation unit 207 changes the reception flag of the transmitted divided file from “False” to “True” (S212 “Yes” → S213). For example, taking FIG. 3 as an example, when the wireless communication unit 211 receives a reception notification of three divided files A1, B1, and C1, the confirmation unit 207 sets each reception flag regarding the divided files A1, B1, and C1 to “ Change from “False” to “True”.

  (14) When the reception flag becomes “True”, the spare divided file copied to the storage unit 204 becomes unnecessary, so the confirmation unit 207 deletes the transmitted divided file copied to the storage unit 204. (S214).

  (15) On the other hand, when the wireless communication unit 211 cannot receive the reception notification, the confirmation unit 207 maintains the state of the reception flag of the transmitted divided file at “False” (S212 “No” → S215). For example, taking FIG. 3 as an example, when the wireless communication unit 211 cannot receive a reception notification only for the divided file C1 of the three divided files A1, B1, and C1, the confirmation unit 207 relates to the divided files A1 and B1. Each reception flag is changed from “False” to “True” (S212 “Yes” → S213), and the state of the reception flag regarding the divided file C1 is maintained as “False” (S212 “No” → S215).

  (16) When the reception flag is in the “False” state, the spare divided file that has been copied to the storage unit 204 is required at the time of retransmission, so the confirmation unit 207 has copied the copy to the storage unit 204. A process indicating that the divided file has not been transmitted (untransmitted process) is performed (S216). For example, when the reception flag of the divided file C1 is “False”, even if the divided file C1 has been transmitted once, the confirmation unit 207 performs the non-transmission processing of the divided file C1 to the storage unit 204 and the divided file C1. The spare divided file C1 copied in the storage unit 204 is stored until the reception flag of C1 becomes “True”.

  (17) When the deletion of the transmitted divided file (S214) or the non-transmission processing of the divided file (S216) ends, the above (9) is repeated until the transmission of the untransmitted divided file is completed by the dequeue unit 205 and the retransmission unit 208. ) To (16) are repeated (S209 to S216). On the other hand, when the transmission of the unsent divided file is completed, the dequeue unit 205 discards the transmission ID stored in the storage unit 204 (S217), and ends the processing by the server 3.

  Next, the flow of processing in the server 3 of this embodiment will be described. FIG. 6 is a flowchart illustrating an example of a process flow in the server 3 of the present embodiment.

  (1) First, the communication unit 311 of the server 3 receives the transmission declaration transmitted from the client 2 (S301). Since the transmission declaration includes information on the division number and size of the divided file to be transmitted in the future, not only the division number and size of the divided file but also the file size when the divided file is restored can be known in advance. it can. For example, if the number of divided files is 10, the size of the divided file other than the last is 50 kb, and the size of the last divided file is 45 kb, the file is 495 kb (= 50 kb × 9 + 45 kb × 1). It is calculated that

  (2) When the server 3 receives the transmission declaration, the unused transmission ID stored in the storage unit 304 is assigned for transmission from the client 2 and the transmission ID is transmitted to the client 2 (S302).

  (3) After the transmission ID is transmitted, reception of the divided file transmitted from the client 2 is started (S303).

  (4) When reception of the divided file is completed, the confirmation unit 307 changes the reception flag of the received divided file from “False” to “True” (S304). For example, when the reception of the three divided files A1, B1, and C1 is completed, the confirmation unit 307 changes the reception flags for the divided files A1, B1, and C1 from “False” to “True”, respectively.

  (5) After the confirmation unit 307 changes the reception flag of the divided file to “True”, the confirmation unit 307 transmits a reception notification to the client 2 via the communication unit 311 (S305). For example, when each reception flag regarding the divided files A1, B1, and C1 is changed to “True”, the confirmation unit 307 transmits a reception notification to the client 2 that the divided files A1, B1, and C1 have been received.

  (6) If the divided file to which the reception notification is transmitted is not the last divided file, reception of the divided file is continued (S306 “No” → S303). For example, when the divided files of the file A are identified by A1 to A10, the divided file A10 becomes the last divided file. Therefore, when the divided files A1 to A9 are received, the reception of the divided files is continued.

  (7) On the other hand, when the divided file to which the reception notification is transmitted is the last divided file, the confirmation unit 307 confirms whether there is “False” among the reception flags of all the divided files (S306 “Yes”). → S307).

  (8) If “False” exists in the reception flag, the client 2 is requested to retransmit the “False” divided file (S308).

  (9) When an unreceived divided file is transmitted from the client 2 based on the divided file retransmission request, the communication unit 311 receives the divided file (S309).

  (10) When the communication unit 311 receives the unreceived divided file, the confirmation unit 307 changes the reception flag to “True” for the unreceived divided file (S310).

  (11) After the confirmation unit 307 changes the reception flag of the divided file to “True”, the confirmation unit 307 transmits a reception notification to the client 2 via the communication unit 311 as described above (S311). Then, it is checked whether “False” is present in the reception flags of all the divided files (S311 → S307).

  (12) If “False” does not exist in the reception flag, the transmission process from the client 2 to the server 3 is completed, so that the transmission ID assigned to the client 2 is returned from the client 2 by the discarding of the transmission ID by the client 2. Assign to other communications (S312).

  (13) After the reception flags of all the divided files become “True”, the restoration unit 306 restores the files from all the received divided files. For example, the file A is restored from the divided files A1 to A10 based on the division identification number of the header information given to the divided files A1 to A10.

[Supplementary explanation regarding the flow of processing in the communication system 1]
Note that, regarding points not mentioned in the above description of the processing flow, the processing flow and processing technology in packet communication are used.

[Effect of this embodiment]
Next, the effect of the communication apparatus of this embodiment will be described. FIG. 7 is a conceptual diagram showing a state in which the bandwidth of the wireless communication line T has sharply decreased in the communication system 1 of the present embodiment.

  (1) This embodiment includes a dividing unit 201 that divides a file into a plurality of divided files, a queue generating unit 202 that generates a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the wireless communication line T, and a division An enqueue means 203 for enqueuing a file into a queue, a dequeue means 205 for dequeuing a plurality of enqueued divided files in parallel by a predetermined number of parallel dequeues, and a restoration means 306 for restoring a file from the plurality of dequeued divided files , A communication system 1.

  That is, as shown in FIG. 3, FIG. 4 and FIG. 7, since the queue of the file to be dequeued is changed to a plurality, the number of parallel dequeues can be increased or decreased according to the unstable bandwidth of the wireless communication line T. . In addition, since the transmission target is changed from the packet to the divided file, even if the wireless communication line T becomes unstable or disconnected, only the untransmitted divided file is returned when the wireless communication line T returns to the connected state. If you send it, you can restore the file.

  Thereby, since the increase / decrease in the bandwidth of the unstable wireless communication line T can always be effectively used, the communication speed of the communication system 1 can be improved several times or more compared to the conventional packet communication packet. .

  For example, as shown in FIG. 3, assume that the bandwidth of the queue is 20 kbps, the bandwidth of the wireless communication line T is 63 kbps, the number of parallel dequeues is 3, and the number of file divisions of file A is 10. Also assume that the first three divided files A1, B1, C1 and the next three divided files A2, B2, C2 are dequeued in parallel.

  Under such conditions, when the wireless communication line T is in a stable connection state, a conventional packet that is dequeued and transmitted from only one queue in which the bandwidth of the queue is set to a predetermined fixed bandwidth as in the prior art It is clear that the communication system 1 of the present embodiment uses the bandwidth of the wireless communication line T more efficiently than the communication system.

  As shown in the conventional example and FIG. 10, in the conventional packet communication system that dequeues and transmits only from one queue in which the queue bandwidth is set to the variable bandwidth, the variable bandwidth of the queue itself causes a variable delay. It is the cause. Further, in consideration of a significant increase / decrease in the bandwidth of the wireless communication line T in a mobile communication terminal or the like, the conventional packet communication system that changes the bandwidth of the queue up to the upper limit of the bandwidth of the wireless communication line T is inefficient. In contrast, as shown in FIGS. 3, 4, and 7, the communication system 1 according to this embodiment in which no or little variable delay occurs efficiently uses the bandwidth of the wireless communication line T. I understand.

  Further, under the same conditions as described above, when the wireless communication line T is disconnected, the dequeue of the divided files after the divided files A3, B3, and C3 is temporarily interrupted. If this is a packet for conventional packet communication, all the packets including the leading packet must be retransmitted when the wireless communication line T is again connected. On the other hand, in the case of the communication system 1 of the present embodiment, since the transmission target is managed not by the packet but by the divided file, the six divided files A1, B1, C1 transmitted before the wireless communication line T is disconnected. , A2, B2, and C2 need not be retransmitted after the communication line T is reconnected. Because, with respect to file A, 20% of all divided files (A1, A2) have already been transmitted, and the remaining 80% of divided files (A3 to A10) are transmitted. This is because the transmission is completed.

  As a result, according to the communication system 1 of the present embodiment, the communication speed can be greatly improved over the conventional packet communication.

  (2) The communication system 1 includes storage means 204 and 304 for storing files and queues, confirmation means 207 and 307 for confirming transmission / reception results for each divided file by flag management, and division obtained from the confirmation means 207 and 307. Based on the reception failure information of the file, the dequeue unit 205 re-dequeues the division file of the reception failure, and the division file of the reception success is stored from the storage unit 204 based on the reception success information of the division file obtained from the confirmation unit. It is preferable to further include retransmission means 208 for erasing.

  As a result, it is possible to check whether all the divided files related to the transmission target file are correctly transmitted, and to retransmit only the untransmitted divided files when there is a defect.

  For example, as shown in FIG. 7, in the state where the bandwidth of the wireless communication line T is 63 kbps, the bandwidth of the queue is 20 kbps, and the number of parallel dequeues is 3, three divided files A1, B1, C1, The divided files A2, B2, and C2 are dequeued in parallel.

  Under the above conditions, when the bandwidth of the wireless communication line T is suddenly reduced from 63 kbps to 41 kbps, the number of parallel dequeues is 2, so that the divided file C1, the next divided file C2, etc. are not dequeued, Even if it is dequeued, the server 3 cannot receive it. Even in such a case, the client 2 and the server 3 mutually confirm which divided file the server 3 could not receive because the checking means 207 of the client 2 and the server 3 performs flag management. Therefore, the divided files C1 and C2 that have not been received from the client 2 to the server 3 can be quickly retransmitted.

  (3) The communication system 1 further includes a scheduling unit 209 that causes the dequeue unit 205 to dequeue each one divided file related to one or a plurality of files selected from the plurality of files by the number of parallel dequeues. It is preferable to provide.

  As a result, as shown in FIG. 3, the divided files of a plurality of files can be transmitted at the same time, so that the transmission delay of the low priority file can be reduced.

  (4) The communication system 1 further includes a scheduling unit 209 that causes the dequeue unit 205 to dequeue one or a plurality of divided files selected from the plurality of divided files related to one file by the number of parallel dequeues. It is preferable to provide.

  Thereby, as shown in FIG. 4, a high priority file can be transmitted at high speed.

  (5) The data amount of the divided file is preferably a fixed value that is 100% or less of the data transfer amount that the wireless communication line T can transfer in one second.

  Accordingly, since the divided file can be transmitted in a communication time of 1 second, the divided file can be steadily transmitted even if the connection state of the wireless communication line T is unstable. For example, as shown in FIG. 3, when the bandwidth of the wireless communication line T is 63 kbps, the bandwidth of the queue is 20 kbps, and the data amount of the divided file is 50 kb, the transfer time of one divided file is 2.5 seconds. Therefore, if the wireless communication line T is secured even for 3 seconds, at least one divided file can be transmitted, so that the merit of changing from a packet to a divided file is great.

  Further, since the data amount of the divided file is set to a fixed value, it is not necessary to perform processing for analyzing the data amount of the divided file. As a result, the divided file can be transmitted at high speed.

  (6) It is preferable that the queue generation unit 202 sets the quotient obtained by dividing the bandwidth of the wireless communication line T by the bandwidth of the queue as the number of parallel dequeues.

  Thereby, the bandwidth of the radio communication line T can be utilized to the maximum.

  (7) Preferably, the queue generation unit 202 determines the queue bandwidth so that the queue bandwidth is equal to or greater than a predetermined bandwidth.

  This makes it possible to guarantee the minimum bandwidth of the queue.

  (8) In the present embodiment, a dividing unit 201 that divides a file into a plurality of divided files, and a queue generating unit 202 that generates a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the wireless communication line T The mobile radio communication terminal 2 includes: an enqueue unit 203 that enqueues the divided files into a queue; and a dequeue unit 205 that dequeues the plurality of enqueued divided files in parallel by the number of parallel dequeues.

  That is, since the queue of the file to be dequeued is changed to a plurality, the number of parallel dequeues can be increased or decreased according to the unstable bandwidth of the wireless communication line T. In addition, since the transmission target is changed from the packet to the split file, even if the wireless communication line T returns to the connected state even if the wireless communication line T becomes disconnected, if only the untransmitted split file is transmitted, The file can be restored.

  Thereby, since the increase / decrease in the bandwidth of the unstable wireless communication line T can always be effectively used, the communication speed of the mobile wireless communication terminal 2 can be improved several times or more as compared with the conventional packet communication.

  (9) In the present embodiment, a dividing unit 201 that divides a file into a plurality of divided files, and a queue generating unit 202 that generates a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the wireless communication line T An enqueue unit 203 that enqueues the divided files into a queue, a storage unit 204 that stores the files and queues, a dequeue unit 205 that dequeues the plurality of enqueued divided files in parallel according to the number of parallel dequeues, and As a communication program that causes a computer to function.

  That is, since the queue of the file to be dequeued is changed to a plurality, the number of parallel dequeues can be increased or decreased according to the unstable bandwidth of the wireless communication line T. In addition, since the transmission target is changed from the packet to the split file, even if the wireless communication line T returns to the connected state even if the wireless communication line T becomes disconnected, if only the untransmitted split file is transmitted, The file can be restored.

  As a result, the increase and decrease of the bandwidth of the unstable wireless communication line T can always be effectively used, so that the communication speed of the computer in which the communication program of this embodiment is installed is improved several times or more compared with the conventional packet communication. Can be made.

  (10) The present embodiment is a storage medium for storing the communication program.

  That is, similarly to the above, the communication speed of the computer in which the communication program is installed can be improved several times or more than the conventional one.

  (11) In the present embodiment, a file dividing step for dividing a file into a plurality of divided files, a queue generating step for generating a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the wireless communication line T, An enqueue step that enqueues split files into a queue, a dequeue step that dequeues multiple enqueued split files in parallel by the number of parallel dequeues according to the bandwidth, and a file recovery that restores files from multiple dequeued split files And a communication method.

  That is, since the queue of the file to be dequeued is changed to a plurality, the number of parallel dequeues can be increased or decreased according to the unstable bandwidth of the wireless communication line T. In addition, since the transmission target is changed from the packet to the split file, even if the wireless communication line T returns to the connected state even if the wireless communication line T becomes disconnected, if only the untransmitted split file is transmitted, The file can be restored.

  As a result, the increase and decrease of the bandwidth of the unstable wireless communication line T can always be effectively used, so the communication speed of the communication system 1 adopting the above communication method is improved several times or more compared with the conventional packet communication. Can be made.

  That is, according to the communication system, the mobile radio communication terminal, the communication program, the storage medium, and the communication method of this embodiment, there is an effect that the communication speed and the communication reliability can be improved.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed.

  For example, in another embodiment, the “divided file” in this embodiment can be changed to “a plurality of packets obtained by further dividing the divided file”.

  That is, in another embodiment, the dividing unit 201 divides a file into a plurality of divided files and then further divides the divided file into a plurality of packets. The enqueue unit 203 enqueues a plurality of packets obtained by dividing the divided file. The dequeue unit 205 dequeues a plurality of enqueued packets in parallel by a predetermined number of parallel dequeues. The restoration unit 306 restores the divided file and the file from the plurality of dequeued packets. Thereby, in other embodiment, both the effect of this embodiment mentioned above and the effect acquired by the conventional packet communication can be acquired.

  In the communication system of the present embodiment, the upstream side of the wireless communication line (the transmission side of the client 2 with respect to the server 3) is mainly described. However, in the communication system of other embodiments, the upstream side of the wireless communication line It can be applied to both the downstream side (the transmission side of the server 3 with respect to the client 2). In the case of the downstream side, the relationship between the client 2 and the server 3 may be reversed in the communication system of the present embodiment.

  Further, even in a communication line other than a wireless communication line, in an unstable line situation, the communication speed and communication reliability can be improved by using the communication system of this embodiment.

1 communication system 2 client (mobile radio communication terminal)
3 Server 5 Storage medium 201, 301 Division means 202, 302 Queue generation means 203, 303 Enqueue means 204, 304 Storage means 205, 305 Dequeue means

206, 306 Restoration means 207, 307 Confirmation means 208, 308 Retransmission means 209, 309 Scheduling means 210 File generation means 211, 311 (wireless) communication means A to D files A1 to An ₁ divided file Q1 queue T wireless communication line

(1) The present invention sets a data amount of a divided file to a predetermined data amount based on a data transfer amount that can be transferred within a predetermined time by a communication line , and a plurality of divided files in which the file is set to a predetermined data amount Or dividing means for dividing the file into a plurality of divided files set to a predetermined amount of data and then dividing the divided file into a plurality of packets, and a bandwidth equal to or less than the bandwidth of the communication line. A queue generating means for generating a plurality of queues, an enqueue means for enqueuing a divided file or packet in the queue, and a plurality of enqueued divided files or packets in parallel by the number of parallel dequeues corresponding to the bandwidth of the communication line. and dequeue means, the reception failure information of the divided file obtained from the flag management for transmission and reception result for each divided file And Zui comprises a retransmission means for re dequeued packets obtained only from separate files or only the divided file of the reception failure to dequeue unit, and restoring means for restoring files from dequeued plurality of divided files or packets were the It is a communication system.

(2) Further, it is preferable that the dividing unit sets the predetermined data amount of the divided file to 100% or less of the data transfer amount that the communication line can transfer in one second .

(3) It is preferable that the dividing unit sets the predetermined data amount of the divided file to a fixed data amount .

( 4) Preferably , the queue generation means determines the queue bandwidth so that the queue bandwidth is equal to or greater than a predetermined bandwidth.

(5) Further , the present invention sets the data amount of the divided file to a predetermined data amount based on the data transfer amount that the communication line can transfer within a predetermined time, and a plurality of files in which the file is set to the predetermined data amount . Dividing means for dividing the file into divided files or dividing the file into a plurality of divided files set to a predetermined amount of data and then dividing the divided file into a plurality of packets, and a bandwidth less than the bandwidth of the mobile radio communication line A queue generating means for generating a plurality of queues set to a width; an enqueue means for enqueuing a divided file or packet into a queue; and a plurality of enqueued divided files or packets in parallel according to a bandwidth of a mobile radio communication line and dequeue unit only dequeues dequeuing in parallel, split off resulting from the flag management for transmission and reception result for each divided file Based on the received failure information yl, a mobile wireless communication terminal comprising: a retransmission means for re dequeued resulting packet only from separate files or only the divided file of the reception failure to dequeue means.

( 6 ) Further, according to the present invention, the data amount of the divided file is set to a predetermined data amount based on the data transfer amount that the communication line can transfer within a predetermined time, and the file is set to a plurality of data set to the predetermined data amount . Dividing into divided files, or dividing means for dividing the file into a plurality of divided files set to a predetermined amount of data and then dividing the divided file into a plurality of packets, and a bandwidth less than the bandwidth of the communication line Queue generation means for generating a plurality of set queues, enqueue means for enqueuing divided files or packets into the queue, and paralleling a plurality of enqueued divided files or packets by the number of parallel dequeues corresponding to the bandwidth of the communication line and dequeue means to dequeue the reception loss divided file obtained from the flag management for transmission and reception result for each divided file Based on the information, a communication program for causing a computer to function the packet obtained from only divided files or only the divided file of the reception failure to dequeue unit retransmission means for re dequeued, as.

( 7 ) Moreover, this invention is a storage medium which memorize | stores said communication program.

( 8 ) Further, according to the present invention, the data amount of the divided file is set to a predetermined data amount based on the data transfer amount that the communication line can transfer within a predetermined time, and the file is set to a plurality of data set to the predetermined data amount . A division step of dividing the file into divided files or dividing the file into a plurality of divided files set to a predetermined amount of data and then dividing the divided file into a plurality of packets; A queue generation step for generating a plurality of set queues, an enqueue step for enqueuing divided files or packets into the queue, and a plurality of enqueued divided files or packets in parallel by the number of parallel dequeues corresponding to the bandwidth of the communication line and dequeue step of dequeuing, division obtained from the flag management for transmission and reception result for each divided file Based on the received failure information Airu is a communication method comprising a retransmission step of re dequeued resulting packet only from separate files or only the divided file of the reception failure to dequeue means.

(1) In the present embodiment, the data amount of the divided file is set to a predetermined data amount based on the data transfer amount that can be transferred within a predetermined time by the wireless communication line T, and a plurality of files in which the file is set to the predetermined data amount A dividing unit 201 for dividing the divided file into a plurality of divided files, a queue generating unit 202 for generating a plurality of queues set to a bandwidth equal to or less than a bandwidth of the wireless communication line T, an enqueue unit 203 for enqueuing the divided file into the queue, A dequeue unit 205 that dequeues a plurality of enqueued divided files in parallel by a predetermined number of parallel dequeues, and the dequeue unit 205 receives the received information based on reception failure information of the divided file obtained from flag management related to a transmission / reception result for each divided file. Re-dequeue only failed split files or packets from only those split files That a retransmission unit 208, the restoring means 306 for restoring files from dequeued plurality of divided files, a communication system 1 comprising a.

That is, as shown in FIG. 3, FIG. 4 and FIG. 7, since the queue of the file to be dequeued is changed to a plurality, the number of parallel dequeues can be increased or decreased according to the unstable bandwidth of the wireless communication line T. . In addition, the data transfer amount that the communication line can transfer within a predetermined time, that is, the dividing means sets the data amount of the divided file to the predetermined data amount based on the communication band, and the transmission target is changed from the packet to the divided file. Even if the wireless communication line T becomes unstable or disconnected, the file can be restored by transmitting only the unsent divided files when the wireless communication line T returns to the connected state.

In addition, since the communication system 1 includes the retransmission unit 208, it is confirmed whether all the divided files related to the transmission target file are correctly transmitted, and if there is a defect, only the untransmitted divided file is retransmitted. be able to.

The communication system 1 further includes scheduling means 209 that causes the dequeue means 205 to dequeue each one divided file related to one or a plurality of files selected from the plurality of files by the number of parallel dequeues. It is preferable.

The communication system 1 further includes scheduling means 209 that causes the dequeue means 205 to dequeue one or more divided files selected by the number of parallel dequeues from among a plurality of divided files related to one file. It is preferable.

  (2) Further, it is preferable that the dividing unit 201 sets the predetermined data amount of the divided file to 100% or less of the data transfer amount that the communication line T can transfer per second.

(3) The dividing unit 201 preferably sets the predetermined data amount of the divided file to a fixed data amount. That is , since the data amount of the divided file is set to a fixed value, it is not necessary to perform processing for analyzing the data amount of the divided file. As a result, the divided file can be transmitted at high speed.

Further , it is preferable that the queue generating unit 202 sets the quotient obtained by dividing the bandwidth of the wireless communication line T by the bandwidth of the queue as the number of parallel dequeues.

(4) In addition , it is preferable that the queue generation unit 202 determines the queue bandwidth so that the queue bandwidth is equal to or greater than a predetermined bandwidth.

( 5 ) In the present embodiment, the data amount of the divided file is set to a predetermined data amount based on the data transfer amount that the wireless communication line T can transfer within a predetermined time, and the file is set to the predetermined data amount. A dividing unit 201 for dividing the divided file into a plurality of divided files, a queue generating unit 202 for generating a plurality of queues set to a bandwidth equal to or less than a bandwidth of the wireless communication line T, and an enqueue unit 203 for enqueuing the divided files into the queue. A dequeue unit 205 that dequeues a plurality of enqueued divided files in parallel as many as the number of parallel dequeues, and the dequeue unit 205 receives the received information based on the reception failure information of the divided file obtained from flag management regarding the transmission / reception result for each divided file. Re-dequeue only failed split files or packets from only those split files And retransmitting means 208 for a mobile wireless communication terminal 2 with a.

( 6 ) In the present embodiment, the data amount of the divided file is set to the predetermined data amount based on the data transfer amount that can be transferred within the predetermined time by the wireless communication line T, and the file is set to the predetermined data amount. A dividing unit 201 for dividing the divided file into a plurality of divided files, a queue generating unit 202 for generating a plurality of queues set to a bandwidth equal to or less than a bandwidth of the wireless communication line T, and an enqueue unit 203 for enqueuing the divided files into the queue. A dequeue unit 205 that dequeues a plurality of enqueued divided files in parallel as many as the number of parallel dequeues, and the dequeue unit 205 receives the received information based on the reception failure information of the divided file obtained from flag management regarding the transmission / reception result for each divided file. Re-dequeue only failed split files or packets from only those split files And retransmitting means 208 for a communication program that causes a computer to function as a.

( 7 ) Moreover, this embodiment is a storage medium which memorize | stores said communication program.

( 8 ) In the present embodiment, the data amount of the divided file is set to the predetermined data amount based on the data transfer amount that can be transferred within the predetermined time by the wireless communication line T, and the file is set to the predetermined data amount. Dividing into a plurality of divided files, or dividing the file into a plurality of divided files set to a predetermined amount of data, and then dividing the divided file into a plurality of packets; A queue generation step for generating a plurality of queues set to bandwidth, an enqueue step for enqueuing a divided file or packet into a queue, and a parallel dequeue according to the bandwidth of the communication line for the plurality of divided files or packets enqueued and dequeue step of dequeuing in parallel by the number, obtained from the flag management for transmission and reception result for each divided file Based on the received failure information of the divided file, restoring a retransmission step of re dequeued resulting packet only from separate files or only the divided file of the reception failure to dequeue unit, a file from dequeued plurality of divided files And a file restoration step.

Claims (11)

Dividing means for dividing the file into a plurality of divided files, or dividing the file into a plurality of divided files and further dividing the divided file into a plurality of packets;
Queue generating means for generating a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the communication line;
Enqueue means for enqueuing the divided file or the packet into the queue;
Dequeue means for dequeuing a plurality of enqueued divided files or packets in parallel by the number of parallel dequeues corresponding to the bandwidth of the communication line;
Restoring means for restoring the file from the dequeued divided files or the packets;
A communication system comprising: Storage means for storing the file or the packet and the queue;
Confirmation means for confirming a transmission / reception result for each divided file by flag management;
Based on the reception failure information of the divided file obtained from the confirmation unit, the dequeue unit re-dequeues the reception failure division file or the packet related to the division file, and the division file obtained from the confirmation unit Resending means for erasing the reception-successful split file or the packet related to the split file from the storage means based on the reception success information of
The communication system according to claim 1, further comprising: Scheduling means for dequeuing each demultiplexed file related to one or a plurality of files selected from the plurality of files by the number of parallel dequeues or a packet related to the divided files, to the dequeue means;
The communication system according to claim 1 or 2, further comprising: Scheduling means for dequeuing one or a plurality of divided files selected from the plurality of divided files related to one file by the number of parallel dequeues or a packet related to the divided files with respect to the dequeue means;
The communication system according to claim 1 or 2, further comprising:   5. The communication system according to claim 1, wherein the data amount of the divided file is a fixed value of 100% or less of a data transfer amount that can be transferred by the communication line per second.   The communication system according to any one of claims 1 to 5, wherein the queue generation means uses a quotient obtained by dividing the bandwidth of the communication line by the bandwidth of the queue as the number of parallel dequeues. .   The communication system according to any one of claims 1 to 6, wherein the queue generation unit determines the bandwidth of the queue so that the bandwidth of the queue is equal to or greater than a predetermined bandwidth. Dividing means for dividing the file into a plurality of divided files, or dividing the file into a plurality of divided files and further dividing the divided file into a plurality of packets;
Queue generating means for generating a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the mobile radio communication line;
Enqueue means for enqueuing the divided file or the packet into the queue;
Dequeue means for dequeueing a plurality of the divided files or packets enqueued in parallel by the number of parallel dequeues corresponding to the bandwidth of the mobile radio communication line;
A mobile radio communication terminal comprising: Dividing means for dividing the file into a plurality of divided files, or dividing the file into a plurality of divided files and further dividing the divided file into a plurality of packets;
Queue generating means for generating a plurality of queues set to a bandwidth equal to or lower than the bandwidth of the communication line;
Enqueue means for enqueuing the divided file or the packet into the queue;
Dequeue means for dequeuing a plurality of enqueued divided files or packets in parallel by the number of parallel dequeues corresponding to the bandwidth of the communication line;
A communication program that allows a computer to function.   A storage medium for storing the communication program according to claim 9. Dividing the file into a plurality of divided files, or dividing the file into a plurality of divided files and then dividing the divided file into a plurality of packets; and
A queue generation step for generating a plurality of queues set to a bandwidth equal to or less than the bandwidth of the communication line;
An enqueue step for enqueuing the split file or the packet into the queue;
A dequeue step of dequeuing the plurality of divided files or packets enqueued in parallel by the number of parallel dequeues according to the bandwidth of the communication line;
A communication method comprising:

Images