JP2014241552A - Compression instruction device, distribution system, compression instruction method, and compression instruction program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compression instruction device capable of normally receiving content having contents desired by a radio terminal that performs communication via a particular communication device at which congestion has occurred, while reducing congestion.SOLUTION: A compression instruction device comprises: congestion determination means that obtains first congestion information on congestion at a communication device, and determines whether congestion has occurred or not from the first congestion information; and compression instruction means that instructs a content compression device to compress content that is stored in a content distribution device and distributed to a radio terminal that performs communication via the communication device.

Description

  The present invention relates to a compression instruction device, a distribution system, a compression instruction method, and a compression instruction program that reduce the communication amount of a wireless terminal that performs communication via a specific communication device in which congestion has occurred.

  The radio communication network includes a radio access network and a core network. The radio access network includes a large number of radio terminals and a plurality of radio base stations. The wireless base station is wirelessly connected to the wireless terminal and wired to the core network. The core network includes various servers and various network devices that connect the wireless base station and the server.

  When a large number of wireless terminals located in one sector managed by a wireless base station perform a large amount of communication simultaneously with the server, communication congestion occurs in a specific part of the wireless communication network from the wireless base station managing the sector to the server. Will occur. Therefore, there is a problem that the quality of the network service is deteriorated as a result of a shortage of communication resources that can be used by one wireless terminal.

  There are various techniques for dealing with the above problems. For example, Patent Document 1 discloses a mobile phone system that can reduce congestion in a sector of a radio base station.

  In the mobile phone system of Patent Document 1, the mobile phone uses one of a communication method of a line method and a packet method. Furthermore, when using a packet system, a mobile phone uses either high-speed data communication or low-speed data communication.

  The mobile phone system of Patent Document 1 operates as follows.

  When the congestion level of a certain sector exceeds a predetermined threshold, the monitoring station permits only the packet system as the mobile phone communication system. When the congestion level of a certain sector exceeds another higher threshold, the monitoring station permits only low-speed data communication.

  As a result of the above operation, in a sector in which congestion occurs, a communication method that consumes a large amount of communication resources is prohibited, and congestion in the sector in which congestion occurs is reduced.

  A content distribution system that distributes compressed content or uncompressed content according to the type of communication terminal in response to a content request from the communication terminal is disclosed in Patent Document 2.

  The content distribution server of Patent Literature 2 stores compressed content data for portable wireless terminals and uncompressed content data for content playback devices. Upon receiving a content distribution request from the mobile wireless terminal, the content distribution server distributes the compressed content data to the mobile wireless terminal and the uncompressed content data to the content reproduction device.

  As a result of the above operation, in the content distribution system of Patent Document 2, compressed content or non-compressed content is distributed according to the type of communication terminal.

Japanese Patent Laying-Open No. 2003-61141 (page 3-5, FIGS. 1 and 4) JP 2008-193245 A (page 6-13, FIGS. 1 and 5)

  When reducing the congestion of the sector of the radio base station, it is desirable that the radio terminal can receive content having desired contents even if the quality of the received content is reduced.

  However, in the mobile phone system of Patent Document 1, a mobile phone located in a sector where congestion has occurred cannot use a high-speed communication method. For this reason, the mobile phone system of Patent Document 1 requires a long time to receive content. In particular, when receiving content (such as real-time streaming) in which content reception and playback are performed in parallel, normal content may not be played back. As described above, when the congestion in the sector of the radio base station is reduced, there is a problem that the radio terminal located in the sector where the congestion has occurred cannot receive the content having the desired content.

By the way, in the content distribution system of patent document 2, since compressed content or non-compressed content is distributed according to the type of communication terminal, there is a problem that sudden congestion in a specific communication device cannot be reduced.
(Object of invention)
An object of the present invention is to provide a compression instruction device, a distribution, which enables a communication terminal that communicates via a specific communication device in which congestion has occurred to normally receive content having desired contents while reducing congestion A system, a compression instruction method, and a compression instruction program are provided.

  The compression instruction device of the present invention acquires first congestion information related to congestion in a communication device, and is accumulated by a congestion determination means for determining presence / absence of congestion from the first congestion information and a content distribution device, and passes through the communication device And a compression instructing unit that instructs the content compression apparatus that compresses the content distributed to the wireless terminal that performs communication to compress the content.

  The distribution system of the present invention includes a wireless terminal, a content distribution device that stores content distributed to the wireless terminal, a content compression device that compresses content distributed to the wireless terminal, and a wireless terminal and a distribution device. A communication device that relays communication, first congestion information relating to congestion in the communication device, congestion determination means for determining the presence or absence of congestion from the first congestion information, and compression that instructs the content compression device to compress content And a compression instruction device including an instruction means.

  According to the compression instruction method of the present invention, first congestion information related to congestion in a communication device is acquired, whether or not there is congestion is determined from the first congestion information, accumulated by a content distribution device, and communicated via the communication device. A content compression apparatus that compresses content distributed to a wireless terminal to perform is instructed to compress the content.

  The compression instruction program of the present invention obtains first congestion information related to congestion in a communication device from a computer provided in a compression instruction device connected to a distribution device that distributes content to a wireless terminal, and congestion from the first congestion information. Congestion determination means for determining presence / absence of content, and compression instruction means for instructing content compression apparatus to compress the content stored in the content distribution apparatus and distributed to the wireless terminal that communicates via the communication apparatus It is made to function as.

  Advantageous Effects of Invention According to the present invention, there is an effect that a wireless terminal that performs communication via a specific communication device in which congestion has occurred can normally receive content having desired contents while reducing congestion.

It is a block diagram which shows an example of a structure of the compression instruction | indication apparatus in the 1st Embodiment of this invention. It is a block diagram which shows an example of the hardware constitutions of the compression instruction | indication apparatus in the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the compression instruction | indication apparatus in the 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the compression instruction | indication apparatus in the 2nd Embodiment of this invention. It is a block diagram which shows an example of a structure of the compression instruction | indication apparatus in the 3rd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the compression instruction | indication apparatus in the 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings, equivalent components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
(First embodiment)
FIG. 1 is a block diagram illustrating an example of a configuration of a compression instruction apparatus according to the present embodiment.

  First, a device or network connected to the compression instruction device 110 will be described.

  The radio access network 200 includes a radio base station 210 and a radio terminal 260. A “wireless access network” is a part of a wireless communication network, and is a network that directly connects a wireless terminal and a wireless base station using a wireless communication method when the wireless terminal communicates with a server or the like on the network. is there. The wireless terminal 260 communicates with a server or the like in the core network 100 via the wireless base station 210.

  The wireless communication system in the present embodiment is not particularly limited. The wireless communication system in the present embodiment may be, for example, W-CDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution, registered trademark), or wireless LAN (Local Area Network).

  The core network 100 includes a terminal management device 190, a content distribution device 170, a content compression device 160, and a compression instruction device 110. The core network 100 is connected to the radio access network 200. A “core network” is a part of a wireless communication network, and connects between wireless base stations or between a wireless base station and a server mainly by a fixed communication line. The core network 100 connects devices including the radio base station 210, the terminal management device 190, the content distribution device 170, the content compression device 160, or the compression instruction device 110.

  The terminal management device 190 manages information such as the identifier of the wireless terminal 260 and the identifier of the sector where the wireless terminal 260 is located or the identifier of the wireless base station that manages the sector where the wireless terminal 260 is located. The identifier of the wireless terminal is not particularly limited. The identifier may be, for example, an IP (Internet Protocol) address, an IMSI (International Mobile Subscriber Identity), or the like. The terminal management device 190 may be, for example, an HLR (Home Location Register). When the wireless base station directly manages the identifier of the wireless terminal (wireless LAN or the like), the terminal management device 190 may be included in the wireless base station 210.

  The content distribution device 170 transmits content data to the wireless terminal 260 via the wireless base station 210. The content distribution server 170 may be included in an external network (such as the Internet) connected to the core network 100. The content transmitted by the content distribution device 170 is not particularly limited. The content transmitted by the content distribution device 170 may be, for example, video or audio streaming data.

  When a certain content is transmitted to a specific wireless terminal, the content compression device 160 can receive an instruction to transmit the compressed content (hereinafter referred to as “compressed content”). The content compression device 160 normally transmits uncompressed content (hereinafter referred to as “uncompressed content”). Note that the content compression device 160 normally does not relay communication between the content distribution device 170 and the wireless base station 210, and when receiving an instruction to transmit the compressed content, the content compression device 160 is not connected between the content distribution device 170 and the wireless base station 210. The route may be changed to relay communication. After the communication path is changed, the content compression device 160 may compress the content received from the content distribution device 170 and transmit the compressed content to the radio base station 210.

  The content compression apparatus 160 processes a first compression instruction for content for a designated wireless terminal or a second compression instruction for content for all wireless terminals located in a designated sector. When the content compression apparatus 160 processes the second compression instruction, the content compression apparatus 160 inquires the terminal management apparatus 190 that manages the sector for the identifiers of all wireless terminals located in the sector.

  The content compression device 160 may transmit compressed content prepared in advance. Alternatively, the content compression apparatus 160 may generate and transmit compressed content from uncompressed content on demand when receiving an instruction to transmit compressed content. Alternatively, the content compression apparatus 160 may cache the compressed content generated from the non-compressed content and transmit the cached compressed content when receiving an instruction to transmit the compressed content for the second time or later. The content compression apparatus 160 may be an apparatus integrated with the content distribution apparatus 170. In the present invention, it is only necessary for the compressed content to have a smaller data amount than the content before compression. Therefore, the compression method applied when the compressed content is generated is arbitrary.

  The compression instruction device 110 instructs the content compression device 160 to compress the content distributed to the wireless terminal 210. The compression instruction device 110 is connected to the content compression device 160 and the wireless access network 200. The compression instruction device 110 may be included in the content compression device 160.

  The compression instruction device 110 includes a congestion determination unit 120 and a compression instruction unit 130.

  The congestion determination unit 120 is connected to the compression instruction unit 130. The congestion determination unit 120 acquires information related to congestion of a communication device in a wireless communication network through which communication by the wireless terminal 210 passes (hereinafter referred to as “congestion information”), and determines the presence or absence of congestion from the congestion information.

  The congestion determination target is not particularly limited as long as it is a communication device or a part of the communication device in the wireless communication network through which communication by the wireless terminal 210 passes. The target of congestion determination is, for example, the radio base station 210, a part that manages a specific sector in the radio base station 210, an apparatus that manages a plurality of radio base stations, and a content compression apparatus 160.

  The congestion information is not particularly limited as long as it is useful information for determining whether there is congestion. When the congestion determination target is a part that manages a specific sector in the radio base station, the congestion information is grasped by the operator of the radio communication network based on, for example, the tendency of congestion for each sector, day of the week, or time period. It may be an estimate of the current degree of congestion for a particular sector. Alternatively, the congestion information may be information acquired from the radio base station 210 or the like. For example, the congestion information may be information relating to the actual communication data amount or the comparison result between the actual communication data amount and the maximum communication capacity.

  When the congestion determination unit 120 determines that there is congestion in the communication device in the wireless communication network through which the communication by the wireless terminal 210 passes, the compression instruction unit 130 performs wireless communication using the communication device in which the congestion has occurred. Instructs the content compression apparatus 160 to compress the content to be distributed to the terminal. For example, when congestion occurs in a sector managed by the radio base station 210, a compression instruction is transmitted to the content compression apparatus 160 in order to compress the content distributed to terminals belonging to the sector. In the compression instruction, a wireless terminal (for example, the wireless terminal 260) as a distribution destination may be specified. Alternatively, when there are a plurality of base stations and content to be distributed to all wireless terminals belonging to the sector managed by the specific base station is compressed, the sector may be specified in the compression instruction.

  The function of the compression instruction device 110 may be separated into the function of the congestion determination unit 120 and the function of the compression instruction unit 130 and may be arranged in two devices.

  FIG. 2 is a block diagram illustrating an example of a hardware configuration of the compression instruction apparatus according to the present embodiment.

  The compression instruction device 101 includes a storage device 102, a CPU (Central Processing Unit) 103, a keyboard 104, a monitor 105, and an I / O (Input / Output) 108, which are connected via an internal bus 106. Yes. The storage device 102 stores an operation program of the CPU 103 such as the compression instruction unit 130. The CPU 103 controls the compression instruction device 101 as a whole, executes an operation program stored in the storage device 102, executes a program such as the compression instruction means 130 and transmits / receives data via the I / O 108. The internal configuration of the compression instruction apparatus 101 is an example. The compression instruction device 101 may include only the CPU 103 and operate using the storage device 102, the keyboard 104, the monitor 105, and the I / O 108 provided outside.

  Next, the operation of this embodiment will be described.

  In the present embodiment, a case where congestion occurs in the radio base station 210 connected to the radio terminal 260 will be described.

  FIG. 3 is a sequence diagram showing the operation of the compression instruction apparatus according to this embodiment.

  First, the content distribution device 170 transmits uncompressed content (step S171).

  Next, the content compression apparatus 160 receives the uncompressed content and transmits the received content as it is (step S161).

  The wireless terminal 260 receives the uncompressed content transmitted from the content distribution device 160 (step S261).

  The congestion determination unit 120 of the compression instruction device 110 receives the congestion information of the sector of the radio base station 210 (step S111). For example, the congestion determination unit 120 receives, as congestion information, a value of the degree of congestion related to the sector of the radio base station 210 that is stored in a storage device (not shown) by the operator of the wireless communication network and transmitted from the storage device. To do.

  The congestion determination unit 120 calculates the degree of congestion based on the congestion information (step S112). For example, the value of the degree of congestion received from the storage device by the congestion determination unit 120 is directly used as the degree of congestion.

  The congestion determination unit 120 determines that congestion has occurred based on the degree of congestion (step S114). For example, the congestion determination unit 120 compares the value of the degree of congestion with a predetermined threshold and determines that congestion has occurred if the value exceeds the threshold.

  The terminal management apparatus 190 transmits the identifier of the wireless terminal 260 located in the sector to the compression instruction unit 130 of the compression instruction apparatus 110 (step S191). The timing at which the terminal management apparatus 190 transmits the identifier of the wireless terminal located in the sector is not particularly limited. The terminal management device 190 may be set to periodically transmit the identifier of the wireless terminal located in the sector to the compression instruction unit 130 of the compression instruction device 110. Alternatively, the terminal management device 190 may transmit the identifier of the wireless terminal located in the sector to the compression instruction unit 130 in accordance with a request from the compression instruction unit 130 of the compression instruction device 110.

  The compression instruction unit 130 receives the identifier of the wireless terminal 260 (step S116). The compression instruction unit 130 designates the identifier of the wireless terminal 260 and instructs the content compression apparatus 160 to compress the content to be distributed to the wireless terminal 260 (step S118).

  The content compression device 160 receives a content compression instruction from the compression instruction means 130 of the compression instruction device 110 (step S162).

  The content distribution device 170 transmits the uncompressed content to the wireless terminal 260 (step S172).

  The content compression device 160 compresses the received uncompressed content according to the received compression instruction, and transmits the compressed content to the wireless terminal 260 (step S163).

  The wireless terminal 260 receives the compressed content from the content compression device 160 (step S262).

  As described above, the compression instruction apparatus 110 according to the present embodiment instructs the content compression apparatus 160 to compress content to be distributed to wireless terminals located in the sector of the wireless base station 210 where congestion has occurred.

  For this reason, the compression instruction apparatus 110 according to the present embodiment can limit the data amount of the compressed content to a data amount that can be received even when congestion occurs, as long as the content can achieve a high compression rate. In particular, in streaming data such as moving images and audio, a high compression ratio can be realized by reducing the frame size, frame rate, color, audio accuracy, and the like. Alternatively, in streaming data or character data, a high compression rate can be realized by limiting the playback time or the length of text to a part of uncompressed content (a predetermined range from the beginning, a digest version, etc.).

  Therefore, the compression instruction device 110 according to the present embodiment reduces the congestion of content having a desired content by a wireless terminal that performs communication via the specific communication device (base station that manages the sector) in which the congestion has occurred. It can be received normally.

Although the specific compression method is not described in detail in the present embodiment, the compression method is not particularly limited in the present embodiment. The compression method may be lossless compression or lossy compression.
(Second Embodiment)
In the description of the present embodiment, descriptions common to the first embodiment and the present embodiment are omitted, and only the differences of the present embodiment from the first embodiment will be described.

  The configuration of the compression instruction device 115 in the present embodiment is the same as the configuration of the compression instruction device 110 in the first embodiment shown in FIG. However, the operation of the compression instruction device 115 is different from the operation of the compression instruction device 110 in the first embodiment shown in FIG. Furthermore, the operation of the radio base station 215 is different from the operation of the radio base station 210 in the first embodiment shown in FIG.

  FIG. 4 is a sequence diagram showing the operation of the compression instruction apparatus according to this embodiment.

  First, the radio base station 215 constantly monitors sector congestion (step S211).

  The processes in steps S171, S161, and S261 are the same as those in the first embodiment.

  The radio base station 215 transmits the congestion data to the congestion determination unit 125 of the compression instruction device 115 (step S212). The timing at which the radio base station 215 transmits the congestion data is not particularly limited. The radio base station 215 may be set to periodically transmit congestion data to the congestion determination unit 125 of the compression instruction device 115. Alternatively, the radio base station 215 may transmit to the congestion determination unit 125 in accordance with a request from the congestion determination unit 125 of the compression instruction device 115.

  The processes in steps S111, S112, and S114 are the same as those in the first embodiment.

  The processing in steps S191, S116, and S118 in the first embodiment is not executed in this embodiment.

  The compression instruction unit 135 specifies the sector identifier included in the congestion data received from the wireless base station 215, and instructs the content compression apparatus 160 to compress the content to be distributed to the wireless terminal 260 (step S119).

  The processes in steps S162, S172, S163, and S262 are the same as those in the first embodiment.

  In the above description, the case where the radio base station 210 transmits congestion data has been described. However, the source of congestion data in the present embodiment is not limited to the wireless base station 210 as long as it is a device that holds congestion information of devices in the wireless communication network. The transmission source of the congestion data may be, for example, the content distribution device 170, a device that manages a plurality of radio base stations, a server, a network monitoring device, or the like.

As described above, the compression instruction device 115 in the present embodiment does not need to receive the identifier of the wireless terminal 210 located in the sector when congestion occurs in a specific sector. Therefore, the compression instruction device 115 in the present embodiment, when congestion occurs in a specific sector, the time required for the compression instruction device to receive the identifier of the wireless terminal located in the sector, This has the effect of shortening the processing time.
(Third embodiment)
In the description of the present embodiment, descriptions common to the first embodiment and the present embodiment are omitted, and only the differences of the present embodiment from the first embodiment will be described.

  FIG. 5 is a block diagram illustrating an example of the configuration of the compression instruction apparatus according to the present embodiment.

  The core network 105 in the present embodiment further includes a probe device 280 in addition to the configuration of the core network 100 in the first embodiment.

  Other configurations of the compression instruction device in the present embodiment are the same as those of the compression instruction device in the first embodiment shown in FIG.

  However, the operation of the compression instruction device 116 is different from the operation of the compression instruction device 110 in the first embodiment shown in FIG.

  A “probe device” is a device that intercepts communication between nodes in a network without affecting communication between nodes. For example, the probe device 280 is connected to the radio base station 210, intercepts communication of the radio terminal 260 via the radio base station 210, and transmits the intercepted communication data (referred to as “intercept data”) to the compression instruction device 116. To do. The probe device 280 may be included in the radio base station 210.

  The intercept data transmitted by the probe device 280 is communication data performed by the wireless terminal 260 with the content distribution device 170 or a server in the core network within a predetermined time. Therefore, from the intercept data, the amount of packets included in the communication data of the wireless terminal 260, the amount of retransmitted packets, the packet reception delay time, and the like can be calculated. Furthermore, the identifier (IP address, IMSI, etc.) of the wireless terminal included in the communication data of the wireless terminal 260 can be extracted from the intercept data. The probe device 280 transmits a part of communication data extracted from all communication data performed by the wireless terminal 260 with the content distribution device 170 or a server in the core network within a predetermined time to the compression instruction device 116. Also good.

  FIG. 6 is a sequence diagram showing the operation of the compression instruction device in the present embodiment.

  First, the probe device 280 always intercepts sector communication (step S281).

  The processes in steps S171, S161, and S261 are the same as those in the first embodiment.

  The probe device 280 transmits the intercept data to the congestion determination unit 126 of the compression instruction device 116 (step S282). The timing at which the probe device 280 transmits the intercept data is not particularly limited. The probe device 280 may be set to periodically transmit the intercept data to the congestion determination unit 126 of the compression instruction device 116. Alternatively, the probe device 280 may transmit to the congestion determination unit 126 in accordance with a request from the congestion determination unit 126 of the compression instruction device 116.

  The processing in step S111 is the same as that in the first embodiment.

  The congestion determination unit 126 calculates the degree of congestion based on the intercept data (step S113). For example, the value of the degree of congestion is calculated based on the amount of packets included in the intercept data received by the congestion determination unit 120 from the storage device, the amount of retransmitted packets, or the packet reception delay time.

  The process in step S114 is the same as that in the first embodiment.

  The processing in steps S191 and S116 in the first embodiment is not executed in this embodiment.

  The compression instruction unit 136 extracts the identifier of the wireless terminal 260 from the communication data for authentication of the wireless terminal 260 included in the intercept data received by the congestion determination unit 126 (step S117). The communication data for authentication is not particularly limited as long as it includes the identifier of the wireless terminal 260. The communication data for authentication is, for example, communication data for authentication using a RADIS (Remote Authentication Dial In User Service) protocol.

  The processes in steps S118, S162, S172, S163, and S262 are the same as those in the first embodiment.

  As described above, the compression instruction device 115 in this embodiment does not need to receive the identifier of the wireless terminal 210 that communicates via the communication device in which congestion has occurred. Therefore, the compression instruction device 116 according to the present embodiment shortens the processing time by the time required for the compression instruction device to receive the identifier of the wireless terminal that communicates via the communication device in which the congestion has occurred. It has an effect.

  In addition, each process of the compression instruction | indication apparatus of FIG. 3, 4, 6 may be performed by software. That is, a computer program for performing each process may be read and executed by a CPU (FIG. 2: 903) provided in the compression instruction apparatus. Even if each process is performed using a program, the same process as the process of the above-described embodiment can be performed. The above program may be stored in a non-transitory medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), a semiconductor memory device such as a flash memory, an optical disk, a magnetic disk, or a magneto-optical disk. .

  Alternatively, each process may be executed by a component such as an individual circuit.

  In addition, this invention is not limited to the above-mentioned embodiment, It can implement in various changes and deformation | transformation in the range which does not deviate from the summary of this invention.

A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
Congestion determination means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information;
Compression instruction means for instructing the content compression apparatus to compress the content accumulated by the content distribution apparatus and distributed to the wireless terminal that performs communication via the communication apparatus;
A compression instruction apparatus comprising:
(Appendix 2)
The congestion determination means intercepts communication between the wireless base station and the wireless terminal, acquires second congestion information related to the communication state, and determines presence or absence of the congestion from the second congestion information The compression instruction device according to Supplementary Note 1, wherein
(Appendix 3)
The compression instruction apparatus according to appendix 2, wherein the communication state includes the number of packets transmitted and received in the communication, the number of retransmissions of the packet, or a reception delay time due to the retransmission.
(Appendix 4)
The compression instruction according to appendix 1, wherein the congestion determination unit acquires third congestion information related to the congestion held by the radio base station, and determines whether or not there is congestion from the third congestion information. apparatus.
(Appendix 5)
The compression instruction means acquires a first identifier of the wireless terminal that performs communication via the communication device, designates the first identifier, and instructs the content compression device to compress the content. 5. The compression instruction device according to any one of appendices 1 to 4, wherein
(Appendix 6)
The compression instruction means intercepts communication for authentication of the wireless terminal and acquires the first identifier;
The compression instruction device according to appendix 5, characterized in that:
(Appendix 7)
The compression instruction means acquires the first identifier held by a terminal management apparatus that manages the identifier of the wireless terminal or the wireless base station.
The compression instruction device according to appendix 5, characterized in that:
(Appendix 8)
The compression instruction means acquires a second identifier of a sector in which the wireless terminal is located, designates the second identifier, and compresses content for all wireless terminals located in the sector. Instruct the compression device,
5. The compression instruction device according to any one of appendices 1 to 4, wherein
(Appendix 9)
A congestion determination apparatus comprising: congestion determination means for acquiring first congestion information related to congestion in a communication apparatus and determining the presence or absence of the congestion from the first congestion information;
The congestion determination device includes a compression instruction unit that instructs a content compression device that compresses content stored in a content distribution device and distributed to a wireless terminal that performs communication via the communication device to the content compression device. A congestion determination apparatus, wherein the determination result is transmitted to a second compression instruction apparatus.
(Appendix 10)
First congestion information related to congestion in the communication device is acquired and accumulated by the content distribution device based on the determination result received from the congestion determination device including a congestion determination unit that determines the presence or absence of the congestion from the first congestion information. And a compression instruction means for instructing the content compression apparatus that compresses the content distributed to the wireless terminal that communicates via the communication apparatus to compress the content. .
(Appendix 11)
A wireless terminal,
A content distribution device for storing content to be distributed to the wireless terminal;
A content compression device for compressing the content distributed to the wireless terminal;
A communication device that relays communication between the wireless terminal and the distribution device;
Congestion determining means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information; and compression instruction means for instructing the content compression apparatus to compress the content ,
A compression instruction device comprising:
A distribution system comprising:
(Appendix 12)
Obtaining first congestion information on congestion in the communication device, determining the presence or absence of the congestion from the first congestion information;
A compression instruction method for instructing a content compression apparatus that compresses content accumulated by a content distribution apparatus and distributed to a wireless terminal that communicates via the communication apparatus to compress the content.
(Appendix 13)
A computer provided with a compression instruction device connected to a distribution device for distributing content to a wireless terminal;
Congestion determination means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information;
Compression instruction means for instructing the content compression apparatus to compress the content stored in the content distribution apparatus and distributed to the wireless terminal that performs communication via the communication apparatus;
Compression instruction program to make it function.

Claims (10)

Congestion determination means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information;
Compression instruction means for instructing the content compression apparatus to compress the content stored in the content distribution apparatus and distributed to the wireless terminal that performs communication via the communication apparatus;
A compression instruction apparatus comprising: The congestion determination means intercepts communication between a wireless base station and the wireless terminal, acquires second congestion information related to the communication state, and determines the presence or absence of the congestion from the second congestion information. The compression instruction device according to claim 1. The compression instruction apparatus according to claim 2, wherein the communication state includes the number of packets transmitted and received in the communication, the number of retransmissions of the packet, or a reception delay time due to the retransmission. 2. The compression instruction according to claim 1, wherein the congestion determination unit acquires third congestion information related to the congestion held by a radio base station, and determines whether or not there is congestion from the third congestion information. apparatus. The compression instruction means acquires a first identifier of the wireless terminal that performs communication via the communication device, designates the first identifier, and instructs the content compression device to compress the content. The compression instruction apparatus according to any one of claims 1 to 4, wherein A congestion determination apparatus comprising: congestion determination means for acquiring first congestion information related to congestion in a communication apparatus and determining the presence or absence of the congestion from the first congestion information;
The congestion determination device includes a compression instruction unit that instructs a content compression device that compresses content stored in a content distribution device and distributed to a wireless terminal that performs communication via the communication device to the content compression device. A congestion determination apparatus, wherein the determination result is transmitted to a second compression instruction apparatus. First congestion information related to congestion in the communication device is acquired and accumulated by the content distribution device based on the determination result received from the congestion determination device including a congestion determination unit that determines the presence or absence of the congestion from the first congestion information. And a compression instruction means for instructing the content compression apparatus that compresses the content distributed to the wireless terminal that communicates via the communication apparatus to compress the content. . A wireless terminal,
A content distribution device for storing content to be distributed to the wireless terminal;
A content compression device for compressing the content distributed to the wireless terminal;
A communication device that relays communication between the wireless terminal and the distribution device;
Congestion determining means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information; and compression instruction means for instructing the content compression apparatus to compress the content ,
A compression instruction device comprising:
A distribution system comprising: Obtaining first congestion information on congestion in the communication device, determining the presence or absence of the congestion from the first congestion information;
A compression instruction method for instructing a content compression apparatus that compresses content accumulated by a content distribution apparatus and distributed to a wireless terminal that communicates via the communication apparatus to compress the content. A computer provided with a compression instruction device connected to a distribution device for distributing content to a wireless terminal;
Congestion determination means for acquiring first congestion information related to congestion in the communication device and determining the presence or absence of the congestion from the first congestion information;
Compression instruction means for instructing a content compression apparatus that compresses content distributed to a wireless terminal that communicates via the communication apparatus to compress the content;
Compression instruction program to make it function.

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