JP2005079740A - Band setting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of dynamically setting a necessary and sufficient band for every content data on the whole of a wired network, based on wired network band setting information. <P>SOLUTION: The band setting method comprises a step of transmitting a contents data send request from a radio terminal to a server, a step of transmitting wired band information from the server to a radio base station, a step of executing a required process for setting a wired band by the server based on the wired band information, a step of creating radio band information by the radio base station based on the wired band information, a step of setting a radio band by the radio base station based on the radio band information, a step of transmitting a band setting completion notice from the radio base station to the server, and a step of transmitting contents data to the respective radio terminals from the server. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a band setting method, and more particularly to a band setting method in an end-to-end of a radio system, that is, a band in a radio access network (between a radio terminal and a radio base station) and a wired network (between a radio base station and a server). It relates to the setting method.

  In a wireless LAN or the like, a wireless terminal is connected to a wireless base station via a wireless access network, and this wireless base station is connected to a server or the like via a wired network. Therefore, a wireless terminal in a wireless LAN or the like can communicate with a server on the Internet via a wireless access network and a wired network.

  In order for such a wireless terminal to receive content such as Internet TV and Internet radio from a server on the Internet at high speed and high quality, the wireless access network and the wired network need to correspond to each content. Sufficient bandwidth must be secured.

  Therefore, the conventional bandwidth setting method automatically sets the bandwidth required for each content in the radio access network (see Patent Document 1).

In addition, in multi-bit rate type content data, the distribution rate can be changed according to the network conditions. Conventionally, the distribution rate is changed based on the data reception status of the wireless terminal (Non-Patent Document 1). reference).
JP 2002-247131 A “Efforts to New Broadband Access Service (Biportable Optical and Wireless Fusion Service)”, NTT Technology Journal August 2001, p17

  However, the above-described conventional bandwidth setting method realizes automatic bandwidth setting necessary for content in a radio access network, and not in a wired network. Also, since the bandwidth required for content transmission differs for each content, it is not appropriate to set the bandwidth of the wired network in advance.

  Therefore, in the above conventional bandwidth setting method, there is a problem that a user who desires to transmit content has to investigate the bandwidth of the wired network required for transmission of the content and change the bandwidth by itself, or There was a problem that this must be notified to the administrator and changed by the administrator.

  Furthermore, in the conventional band setting method, the band setting in the radio access network and the band setting in the wired network are performed as separate procedures. Therefore, the conventional bandwidth setting method has a problem that the bandwidth is secured more than necessary in the entire network.

  Therefore, in the conventional bandwidth setting method, it is impossible to dynamically secure a bandwidth necessary only at the time of content data transmission between the wireless terminal and the server.

  Therefore, the bandwidth setting of the wireless access network and the bandwidth setting of the wired network are linked in advance based on the bandwidth setting information of the wireless access network held by the server, and the bandwidth is dynamically set for each requested content data. A band setting method has been proposed (Japanese Patent Application No. 2003-037573).

  However, many conventional networks do not include a radio access network, and the bandwidth setting information held by the server for setting the network bandwidth is often the bandwidth setting information for the wired network. In this case, in order to apply the above-described band setting method, the server administrator must prepare band setting information for the wireless access network separately from the band setting information for the wired network. In addition, the contents of the bandwidth setting information of the wireless access network prepared in the server are often different for each wireless system, and it is necessary to change the contents of the bandwidth setting information when changing the wireless system.

  When the content data is a multi-bit rate type content whose distribution rate can be changed, the distribution rate can be changed according to network conditions.

  However, conventionally, since the delivery rate is changed based on the data reception status of the wireless terminal, the change of the delivery rate has been made afterwards. For this reason, conventionally, it takes time to change the distribution rate.

  In addition, the status of the radio access network varies greatly depending on the radio wave propagation status. Therefore, in the conventional system in which the wireless terminal measures the state of the wireless access network and changes the distribution rate based on the result, there is a problem that the processing load on the wireless terminal increases.

  Furthermore, the conventional system that measures the status of the radio access network at the radio terminal and changes the delivery rate based on this result has the problem that the bandwidth of the radio access network is consumed when the measurement result is fed back. It was.

  Therefore, in view of such circumstances, the present invention can perform the band setting of the wireless access network and the band setting of the wired network in cooperation with each other based on the band setting information of the wired network held by the server, and An object of the present invention is to provide a bandwidth setting method that can dynamically set a necessary and sufficient bandwidth for each content data to be transmitted.

  In addition, the present invention can quickly change the distribution rate without increasing the processing load of the wireless terminal and the consumption bandwidth of the wireless access network, and can set the set bandwidth of the wireless access network and the wired network according to the change of the distribution rate. An object of the present invention is to provide a bandwidth setting method that can be dynamically changed.

  According to the present invention, the above problem is solved by the following means.

  That is, the first invention provides a content comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network A bandwidth setting method in a system, wherein the wireless terminal transmits the selected content data when one or more content data is selected from a plurality of content data stored in the server. Transmitting a requested content data transmission request to the server; and specifying a wireless base station to which the wireless terminal is connected when the server receives the content data transmission request from the wireless terminal; The server is required to transmit the content data requested to be transmitted. And transmitting the wired bandwidth information related to the bandwidth setting of the network to the identified wireless base station, and the server supports the wired bandwidth information for the wired network between the wireless base station and the server. Performing a process necessary for setting a wired band and transmitting a wired band setting response to the wireless base station; and when the wireless base station receives the wired band information from the server, Creating radio band information necessary for setting a radio band of the radio access network with the radio terminal based on band information, and the radio base station, based on the radio band information Setting a wireless band of the wireless access network with the wireless terminal, and the wireless base station receives the wired band setting response and wireless band Transmitting a bandwidth setting completion notification for notifying completion of bandwidth setting in the wireless access network and the wired network to the server when detecting that the wireless base station is completed, and And a step of transmitting each content data requested to be transmitted from the wireless terminal to the wireless terminal when the bandwidth setting completion notification is received from the station. .

  In a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. In the bandwidth setting method, the wireless terminal requests transmission of the selected content data when one or more content data is selected from a plurality of content data stored in the server. Transmitting a content data transmission request to the server; when the server receives the content data transmission request from the wireless terminal; identifying a wireless base station to which the wireless terminal is connected; The server is requested to transmit the transmission request to the wired network with the identified wireless base station. Performing a process necessary for setting a wired band corresponding to the wired band information related to the band setting of the wired network required for transmission of the tents data, and transmitting a wired band setting response to the wireless base station; The server transmitting the wired band information to the wireless terminal; and when the wireless terminal receives the wired band information from the server, the server and the wireless base station based on the wired band information. Creating radio band information necessary for setting a radio band of the radio access network between, and a radio band based on the radio band information for requesting setting of a radio band in the radio access network by the radio terminal Transmitting a setting request to the radio base station; and the radio base station sends the radio request from the radio terminal. Setting a radio band for which the setting is requested between the radio base station and the radio terminal in the radio access network in response to the received radio band setting request when receiving a zone setting request; Band setting for notifying completion of band setting in the wireless access network and the wired network when the wireless base station receives the wired band setting response and detects that the wireless band setting has been completed. Transmitting a completion notification to the server; and when the server receives the band setting completion notification from the wireless base station, each content data requested to be transmitted from the wireless terminal is transmitted to the wireless terminal. A band setting method characterized by comprising: a step of transmitting to each of them.

  In a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. In the bandwidth setting method, the wireless terminal requests transmission of the selected content data when one or more content data is selected from a plurality of content data stored in the server. A step of transmitting a content data transmission request to the server; and a bandwidth of the wired network required for the server to transmit the content data requested to be transmitted to the wired network with the wireless terminal. Perform the processing necessary to set the wired band corresponding to the wired band information related to the setting, Transmitting a region setting response to the wireless terminal, the server transmitting the wired band information to the wireless terminal, and the wireless terminal receiving the wired band information from the server. Generating wireless band information necessary for setting a wireless band of the wireless access network with the wireless base station based on the wired band information, and the wireless terminal in the wireless access network A step of transmitting a radio band setting request based on the radio band information for requesting setting of a radio band to the radio base station, and when the radio base station receives the radio band setting request from the radio terminal In response to the received radio band setting request, between the radio base station and the radio terminal in the radio access network. A step of setting a wireless band requested for the setting; and when the wireless terminal receives the wired band setting response and detects that the wireless band setting is completed, the wireless access network and the wired Transmitting a bandwidth setting completion notification for notifying completion of bandwidth setting to the network to the server, and transmitting from the wireless terminal when the server receives the bandwidth setting completion notification from the wireless terminal. And a step of transmitting each requested content data to the wireless terminal, respectively.

  A fourth invention is a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. In the bandwidth setting method, the wireless terminal requests transmission of the selected content data when one or more content data is selected from a plurality of content data stored in the server. Transmitting a content data transmission request to the server; when the server receives the content data transmission request from the wireless terminal; identifying a wireless base station to which the wireless terminal is connected; A server is required to transmit the content data requested to be transmitted. Transmitting wired band information related to the setting to the specified wireless base station; and the server sets a wired band corresponding to the wired band information for the wired network between the wireless terminal and the server. A step of transmitting a wired band setting response to the wireless terminal, and when the wireless base station receives the wired band information from the server, based on the wired band information. Creating radio band information necessary for setting a radio band of the radio access network between the radio terminal and the radio base station between the radio terminal and the radio terminal based on the radio band information; Setting the wireless band of the wireless access network, and confirming that the wireless terminal has received the wired band setting response and the wireless band setting has been completed. A bandwidth setting completion notification for notifying the completion of bandwidth setting in the wireless access network and the wired network to the server, and when the server completes the bandwidth setting from the wireless terminal. And transmitting the content data requested to be transmitted from the wireless terminal to the wireless terminal when receiving the notification.

  5th invention. In the band setting method according to any one of the first to fourth inventions, the content data is a multi-bit rate type content in which a distribution rate can be changed within a range of a distribution rate width, and the wired band information Includes information on the distribution rate width, and when the server receives the content data transmission request from the wireless terminal, a set bandwidth value of wired bandwidth information to be transmitted to the wireless terminal or the wireless base station, A step of setting a bandwidth value corresponding to a maximum distribution rate; and when the wireless base station or the wireless terminal detects that the bandwidth setting has failed in the wireless access network or the wired network, the wireless access A configurable bandwidth value that is a bandwidth value that can be set in the network or the wired network. A bandwidth setting failure notification to the server, and when the server receives the bandwidth setting failure notification from the wireless base station or the wireless terminal, a delivery rate corresponding to the configurable bandwidth value A step of determining whether the server is within a range of a distribution rate width included in the wired band information, and a distribution rate width in which the server includes a distribution rate corresponding to the settable band value in the wired band information And changing the set band value of the wired band information to the settable band value when the server determines that the distribution rate corresponding to the settable band value is the wired band information. And changing the delivery rate to a delivery rate corresponding to the settable bandwidth value when it is determined that the delivery rate is within the range of the delivery rate range included in The wireless base station, and the wireless terminal performing bandwidth setting of a wired network and a wireless access network again based on wired bandwidth information in which the set bandwidth value is changed to the configurable bandwidth value; and the server Transmitting the content data requested to be transmitted from the wireless terminal to the wireless terminal when the bandwidth setting completion notification is received. .

  A sixth invention is a band setting method according to any one of the first to fourth inventions, wherein the content data is a multi-bit rate type content in which a distribution rate can be changed within a range of a distribution rate width. The wired band information includes information related to the distribution rate width, wherein the wireless base station transmits a bandwidth status of a wireless access network to the server; and the server indicates a bandwidth status of the wired network. Monitoring, and when the server receives the content data transmission request from the wireless terminal, based on the bandwidth status of the wireless access network received from the wireless base station and the bandwidth status of the monitored wired network, Configurable bandwidth values that can be set for the wireless access network and the wired network Calculating a range value, and determining whether the server has a distribution rate corresponding to the calculated settable band value within a range of a distribution rate width included in the wired band information; When the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the set band value of the wired band information is set to the settable band value. And when the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the distribution rate is set to the settable band value. A step of changing to a corresponding distribution rate, and the server, the wireless base station, and the wireless terminal, the wired bandwidth information in which the set bandwidth value is changed to the settable bandwidth value. And starting the band setting of the wired network and the wireless access network, and when the server receives the band setting completion notification, each wireless terminal transmits each content data requested to be transmitted from the wireless terminal. A bandwidth setting method characterized by comprising the steps of:

  A seventh invention is the bandwidth setting method according to the sixth invention, wherein the wireless base station transmits a bandwidth status of a wireless access network to the server during transmission of content data from the server to the wireless terminal. Transmitting, the step of monitoring the bandwidth status of the wired network, the server based on the bandwidth status of the wireless access network received from the wireless base station and the bandwidth status of the monitored wired network, Determining whether it is possible to increase the bandwidth set in the wired network and the wireless access network, the server compares the distribution rate width with the current distribution rate, and within the distribution rate width Determining whether the delivery rate can be increased; and And increasing the set band value of the wired band information when it is determined that the band set in the radio access network can be increased and the distribution rate can be increased within the distribution rate range, and A step in which the server changes the current distribution rate to a distribution rate corresponding to the increased set bandwidth value; and the server, the wireless base station, and the wireless terminal include wired bandwidth information including the increased set bandwidth value And setting the bandwidth of the wired network and the wireless access network again based on the above.

  According to an eighth aspect of the present invention, the server sets the increased set bandwidth after the bandwidth setting of the wired network and the wireless access network is again performed by the server, the wireless base station, and the wireless terminal. The bandwidth setting method according to the seventh invention is characterized in that the distribution rate is changed to a value corresponding to the value.

  A ninth invention is the bandwidth setting method according to the sixth invention, wherein the wireless communication base station indicates the bandwidth status of the wireless access network to the server while the content data is being transmitted from the server to the wireless terminal. Based on the bandwidth status of the wireless access network received from the wireless base station and the bandwidth status of the monitored wired network. Determining whether it is difficult to secure the bandwidth set in the wireless access network or the wired network, the server compares the distribution rate width with the current distribution rate, and within the distribution rate width Determining whether the delivery rate can be lowered; and Reducing the set bandwidth value of the wired bandwidth information when it is determined that it is difficult to secure the bandwidth set in the network or the wired network and the delivery rate can be lowered within the delivery rate width, A step in which the server changes the current distribution rate to a distribution rate corresponding to the reduced set bandwidth value; and the server, the wireless base station, and the wireless terminal include wired bandwidth information including the reduced set bandwidth value. And setting the bandwidth of the wired network and the wireless access network again based on the above.

  In a tenth aspect of the invention, the server sets the reduced set bandwidth to the current distribution rate before the bandwidth setting of the wired network and the wireless access network is performed again by the server, the wireless base station, and the wireless terminal. The bandwidth setting method according to the ninth aspect is characterized in that the distribution rate is changed to a value corresponding to the value.

  An eleventh aspect of the invention is directed to the band setting method according to any one of the first to tenth aspects of the invention, in the case where the wireless terminal detects a stop of reception of content data from the server. Before the radio base station sets the radio band between the radio base station and the radio terminal in the access network based on the radio band information from the radio band set by the radio base station based on the radio band information Transmitting to the radio base station a radio band change request for requesting to change to the radio band, and when the radio base station receives the radio band change request, the received radio band change request In response to the request, the radio base station determines a radio band between the radio base station and the radio terminal in the radio access network based on the radio band information. A step of changing from a defined wireless band to a wireless band before the wireless base station sets based on the wireless band information, and each device in the wired network transmits content data transmitted from the server to the wireless terminal Wired band reserved for relaying content data when relay stop is detected and relaying of the content data is not resumed even after a certain time has elapsed since the stop of relay was detected And a step of releasing the network to return to the network state before the bandwidth setting.

  A twelfth aspect of the invention is the band setting method according to any one of the first to tenth aspects of the invention, wherein the wired band information is a band according to the wired band information in the wireless access network and the wired network. The wireless band information includes the band reservation time included in the wired band information, and the wireless base station transmits content data from the server to the wireless terminal. Starting the timer for measuring the bandwidth reservation time when the radio base station is started, and content data transmission for requesting to stop transmission of content data when the radio base station detects the end of the timer A step of transmitting a stop request to the server, and when the radio base station detects the end of the timer The radio base station sets a radio band between the radio base station and the radio terminal in the radio access network from a radio band set by the radio base station based on the radio band information based on the radio band information. A step of changing to a wireless band before performing, a step of stopping transmission of content data to the wireless terminal when the server receives the content transmission stop request from the wireless base station, Each device detects a stop of relay of content data transmitted from the server to the wireless terminal, and the relay of the content data is not resumed even if a certain time has elapsed after detecting the stop of the relay And a step of releasing a wired band reserved for relaying the content data. And by a band setting method characterized by returning to the network state before the band setting.

  The thirteenth invention is the band setting method according to any one of the first to tenth inventions, wherein the wired band information corresponds to the wired band information in the wireless access network and the wired network. The wireless band information includes the band reservation time included in the wired band information, and the wireless terminal has started receiving content data from the server. A step of starting a timer for measuring the bandwidth reservation time, and a wireless communication between the wireless base station and the wireless terminal in the wireless access network when the wireless terminal detects the end of the timer. From the radio band set by the radio base station based on the radio band information, the radio base station Transmitting to the radio base station a radio band change request for requesting to change to the radio band before setting based on the information, and when the radio terminal detects the end of the timer, the content Transmitting a content data transmission stop request for requesting to stop data transmission to the server; and when the wireless base station receives the wireless bandwidth change request, in response to the received wireless bandwidth change request The radio base station sets the radio band between the radio base station and the radio terminal in the radio access network based on the radio band information from the radio band set by the radio base station based on the radio band information. A step of changing to a wireless band before setting; and when the server receives the content transmission stop request from the wireless terminal. A step of stopping transmission of content data to the wireless terminal, and each device in the wired network detects a stop of relay of content data transmitted from the server to the wireless terminal, and the relay Releasing the wired band reserved for relaying the content data when the relay of the content data is not resumed even after a predetermined time has elapsed since the detection of the stop. A bandwidth setting method characterized by returning to a network state before setting.

As described above, according to the present invention, based on the bandwidth setting information of the wired network held by the server, the bandwidth setting of the wireless access network and the bandwidth setting of the wired network can be performed in cooperation, and Therefore, the necessary and sufficient bandwidth can be dynamically set for each content data to be transmitted. Therefore, according to the present invention, even when the bandwidth setting information of the server is the bandwidth setting information of a wired network that has been conventionally used frequently. Thus, it is possible to dynamically secure a bandwidth necessary only at the time of transmission of content data at the end-end between the wireless terminal and the server. Further, since any band of the wireless access network and the wired network can be set by the band setting information of the wired network, it is not necessary to create band setting information for each wireless system.

  The present invention also predicts the status of the radio access network at the radio base station. Therefore, according to the present invention, it is possible to quickly change the distribution rate without increasing the processing load of the wireless terminal and the consumption bandwidth of the wireless access network.

  Further, according to the present invention, the set bandwidth of the wireless access network and the wired network can be dynamically changed according to the change of the distribution rate. Therefore, according to the present invention, when the distribution rate is increased, stable data distribution can be performed at the changed distribution rate, and when the distribution rate is decreased, the bandwidth is ensured more than necessary. Can be prevented.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing an overall configuration of a content providing system to which a bandwidth setting method according to an embodiment of the first invention is applied.

  As shown in FIG. 1, a content providing system to which a bandwidth setting method according to an embodiment of the first invention is applied includes a wireless terminal 1 (or a plurality of wireless terminals) and a wireless terminal 1 via a wireless access network 2. A connected wireless base station 3 (or a plurality of wireless base stations) and a server 7 connected to the wireless base station 3 via a wired network 6 are provided.

  The server 7 stores a plurality of content data 8 such as Internet television and Internet radio, a database 9, and a plurality of wired band information 10.

  Here, the wired band information 10 refers to information related to band setting of the wired network 6 that is necessary for transmission of each content data in the plurality of content data 8. The information included in the wired bandwidth information 10 includes various QoS (Quality Of Service) parameters such as bandwidth value, delay amount, peak rate value, maximum packet size, minimum packet size, reservation style, service class, etc. that are to be guaranteed in the network. However, some of the information may be included, and other information may be included.

  The database 9 also describes the correspondence between each content data and each wired band information.

  Next, the band setting method according to the embodiment of the first invention will be briefly described.

  The wireless terminal 1 in FIG. 1 requests transmission of the selected content data when one or more content data is selected from a plurality of content data 8 stored in the server 7 by a user or an application. The content data transmission request to be transmitted is transmitted to the server 7.

  The server 7 that has received the content data transmission request from the wireless terminal 1 identifies the wireless base station 3 to which the wireless terminal 1 is connected, triggered by this reception. In addition, the wired band information 10 corresponding to the content data 8 requested to be transmitted is selected using the database 9, and the selected wired band information 10 (or a part of the information) is transmitted to the radio base station 3. To do.

  Further, the server 7 sets a wired band corresponding to the selected wired band information 10 for the wired network 6 with the wireless base station 3. Specifically, wired network devices (including edge router 4 and edge router 5) belonging to the wireless base station 3, the server 7, and the wired network 6 have contents in the wired network 6 between the wireless base station 3 and the server 7. Ensure consistent bandwidth required for data distribution (multicast distribution is also possible).

  Note that the wired network devices belonging to the wireless base station 3, the server 7, and the wired network 6 in the embodiment of the first invention perform consistent bandwidth reservation in the wired network 6 by using RSVP (resource Reservation Protocol). However, the present invention does not limit the method of ensuring a consistent band in the wired network 6 to a method using RSVP.

  The wireless base station 3 that has received the wired band information 10 from the server 7 creates wireless band information by using the received wired band information 10 (or a part of the information). Here, the radio band information refers to information for setting a radio band necessary for transmission of content data requesting the transmission (multicast transmission is also possible) in the radio access network 2.

  The radio base station 3 sets the band of the radio access network 2 necessary for transmitting content data based on the created radio band information.

  Next, the band setting method according to the embodiment of the first invention will be described in detail.

  FIG. 2 is a sequence diagram for explaining the band setting method according to the embodiment of the first invention.

  First, a user or an application or the like selects content data 8 such as Internet television or Internet radio on the wireless terminal 1.

  Next, the wireless terminal 1 transmits a content data transmission request for requesting transmission of the selected content data 8 to the server 7 (S1).

  Next, the server 7 that has received the content data transmission request from the wireless terminal 1 uses the database 9 to select the wired band information 10 necessary for transmission of the content data 8 requested to be transmitted. Further, the server 7 specifies the wireless base station 3 to which the wireless terminal 1 is connected (S2), and transmits the selected wired band information 10 to the specified wireless base station 3 (S3). Here, the information transmitted to the radio base station 3 may be a part of the wired band information 10.

  Next, the server 7 transmits a PATH message in order to perform band setting by RSVP in the wired network 6 (S4).

  Next, a device in the wired network 6 corresponding to RSVP relays the PATH message and finally reaches the wireless base station 3 (S5, S6).

  Next, based on the wired band information 10 received from the server 7 in S3, the wireless base station 3 that has received the PATH message sends information for setting the band of the wired network 6 required when content data is transmitted to the RESV message. The RESV message is transmitted to the server 7 (S7).

  The RESV message is relayed by the device in the wired network 6 while reversing the route through which the PATH message was transmitted, and is received by the server 7 (S8, S9).

  When the setting of the wired band by RSVP is completed in the server 7 and all the devices in the wired network 6, the server 7 notifies the wireless base station 3 that the wired band setting has been completed (in the case of RSVP, the wired band setting response). A reservation completion message is transmitted to the radio base station 3 (S10).

  Next, based on the wired band information 10 received from the server 7 in S3, the wireless base station 3 sets information (wireless band information) for setting a band necessary for content data transmission in the wireless access network 2. Create (S11). Based on the created wireless bandwidth information, the wireless bandwidth of the wireless access network 2 with the wireless terminal 1 is set (S12). The creation of the radio band information will be described later in detail.

  Here, the setting order of the wireless band setting of the wireless access network 2 and the wired band setting of the wired network 6 does not matter. That is, after the wireless base station 3 creates wireless band information based on the wired band information 10 received from the server 7 and sets the wireless band of the wireless access network 2, the server 7 sends a PATH message to the wireless base station 3. Transmission may be performed to set the wired band of the wired network 6.

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is sent to the server as a band setting completion notification that the band setting has been completed. 7 is transmitted (S13).

  Next, the server 7 that has received the bandwidth setting completion notification starts transmission of the content data 8 requested to be transmitted to the wireless terminal 1 (S14).

  When the radio base station 3 detects that the band setting has failed in the radio access network 2 or the wired network 6, the band set in the radio access network 2 and the wired network 6 is released, and the server 7 transmits content. Discontinue.

  As described above, the embodiment of the first invention uses the wired band information stored in the server, and the wired network band between the wireless base station and the server and the wireless access between the wireless base station and the wireless terminal. Automatically set the network bandwidth. That is, in the embodiment of the first invention, the server has a plurality of pieces of content data and wired band information that enables setting of a wired band for each piece of content data, and the content on the server is selected from the wireless terminal. Then, the server identifies the wireless base station to which the wireless terminal is connected in response to this. The server performs wired band setting corresponding to the wired band information for the wired network with the wireless base station. The wireless base station has a function of creating wireless band information necessary for setting a wireless band of a wireless access network with a wireless terminal based on wired band information, and wireless based on the wireless band information. The base station sets the radio band of the radio access network with the radio terminal. When the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting the content data to the wireless terminal. When the wireless base station detects that the band setting has failed in the wireless access network or the wired network, the band set in the wireless access network and the wired network is released, and the server stops content transmission. This enables the end-to-end network bandwidth between the wireless terminal and the server to be set by setting the bandwidth for each content data to the wireless access network and the wired network based on the wired bandwidth information when content is selected from the wireless terminal. It can be set automatically.

  According to the embodiment of the first invention, when the content is selected from the wireless terminal, the end-to-end network bandwidth between the wireless terminal and the server can be dynamically set only for the bandwidth necessary for content data reception. it can.

  Next, a bandwidth setting method according to an embodiment of the second invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the second invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the first invention is applied, Description is omitted.

  The band setting method according to the embodiment of the second invention will be briefly described.

  The wireless terminal 1 in FIG. 1 requests transmission of the selected content data when one or more content data is selected from a plurality of content data 8 stored in the server 7 by a user or an application. The content data transmission request to be transmitted is transmitted to the server 7.

  The server 7 that has received the content data transmission request from the wireless terminal 1 identifies the wireless base station 3 to which the wireless terminal 1 is connected, triggered by this reception. Also, the wired band information 10 corresponding to the content data 8 requested to be transmitted is selected using the database 9.

  Then, the server 7 sets a wired band corresponding to the selected wired band information 10 for the wired network 6 with the wireless base station 3. Specifically, wired network devices (including edge router 4 and edge router 5) belonging to the wireless base station 3, the server 7, and the wired network 6 have contents in the wired network 6 between the wireless base station 3 and the server 7. Ensure consistent bandwidth required for data distribution (multicast distribution is also possible).

  Note that the wireless base station 3, the server 7, and the wired network device belonging to the wired network 6 in the embodiment of the second invention secure a consistent band in the wired network 6 by using RSVP (resource Reservation Protocol). However, the present invention does not limit the method of ensuring a consistent band in the wired network 6 to a method using RSVP.

  Further, the server 7 transmits the selected wired band information 10 to the wireless terminal 1.

  The wireless terminal 1 that has received the wired band information 10 from the server 7 creates wireless band information by using the received wired band information 10 (or part of the information). Here, the radio band information refers to information for setting a radio band necessary for transmission of content data requesting the transmission (multicast transmission is also possible) in the radio access network 2.

  The wireless terminal 1 transmits a wireless band setting request including the created wireless band information to the wireless base station 3.

  The radio base station 3 that has received the radio band setting request from the radio terminal 1 sets the band of the radio access network 2 necessary for the transmission of the content data based on the received radio band setting request.

  Next, the band setting method according to the embodiment of the second invention will be described in detail.

  FIG. 3 is a sequence diagram for explaining the band setting method according to the embodiment of the second invention.

  S1 to S10 are the same as those in FIG.

  The server 7 transmits the selected wired band information 10 to the wireless terminal 1 (S11).

  Here, the order in which the server 7 transmits the wired band information 10 to the wireless base station 3 (S3) and the order in which the wired band information 10 is transmitted to the wireless terminal 1 (S11) do not matter.

  Next, the wireless terminal 1 that has received the wired bandwidth information 10 from the server 7 creates information (wireless bandwidth information) for setting the bandwidth required for content data transmission in the wireless access network 2 (S12), A wireless band setting request including the created wireless band information is transmitted to the wireless base station 3 (S13). The creation of the radio band information will be described later in detail.

  Next, the wireless base station 3 that has received the wireless bandwidth setting request sets the bandwidth requested by the wireless bandwidth setting request between the wireless base station 3 and the wireless terminal 1 in the wireless access network 2 (S14).

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is sent to the server as a band setting completion notification that the band setting has been completed. (S15).

  Next, the server 7 that has received the bandwidth setting completion notification starts transmission of the content data 8 requested to be transmitted to the wireless terminal 1 (S16).

  When the radio base station 3 detects that the band setting has failed in the radio access network 2 or the wired network 6, the band set in the radio access network 2 and the wired network 6 is released, and the server 7 transmits content. Discontinue.

  As described above, the second embodiment of the present invention uses the wired band information stored in the server, and the wired network band between the wireless base station and the server and the wireless access between the wireless base station and the wireless terminal. Automatically set the network bandwidth. That is, in the embodiment of the second invention, the server has a plurality of pieces of content data and wired band information that enables wired band setting for each content data, and the content on the server is selected from the wireless terminal. And the server identifies the wireless base station to which the wireless terminal is connected. The server performs wired band setting corresponding to the wired band information for the wired network with the wireless base station, transmits the wired band information to the wireless terminal, and the wireless terminal that has received the wired band information receives the wired band information. Based on the wireless band information, the wireless base station has a function of creating wireless band information necessary for setting a wireless band of a wireless access network with the wireless base station. Set the wireless bandwidth of the wireless access network. When the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting the content data to the wireless terminal. When the wireless base station detects that the band setting has failed in the wireless access network or the wired network, the band set in the wireless access network and the wired network is released, and the server stops content transmission. As a result, the end-to-end network bandwidth between the wireless terminal and the server can be automatically set by setting the bandwidth for each content data in the wireless access network and the wired network in response to content selection from the wireless terminal. It becomes possible.

  According to the embodiment of the second invention, when the content is selected from the wireless terminal, the end-to-end network bandwidth between the wireless terminal and the server can be dynamically set only for the bandwidth required for content data reception. it can.

  Next, a bandwidth setting method according to an embodiment of the third invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the third invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the first invention is applied, Description is omitted.

  A band setting method according to an embodiment of the third invention will be briefly described.

  The wireless terminal 1 in FIG. 1 requests transmission of the selected content data when one or more content data is selected from a plurality of content data 8 stored in the server 7 by a user or an application. The content data transmission request to be transmitted is transmitted to the server 7.

  The server 7 that has received the content data transmission request from the wireless terminal 1 uses the database 9 to select the wired band information 10 corresponding to the content data 8 for which transmission has been requested.

  Then, the server 7 transmits the selected wired band information 10 to the wireless terminal 1 and sets a wired band corresponding to the selected wired band information 10 for the wired network 6 between the server 7 and the wireless terminal 1. . Specifically, the wired network devices (including the edge router 4 and the edge router 5) belonging to the server 7 and the wired network 6 are connected in the wired network 6 between the edge router 4 and the server 7 connected to the wireless base station 3. Ensure consistent bandwidth required for content data distribution (multicast distribution is also possible).

  Note that the wired network devices belonging to the wireless terminal 1, the server 7, and the wired network 6 in the embodiment of the third invention secure a consistent band in the wired network 6 by using RSVP (resource Reservation Protocol). Here, since the radio base station 3 does not support RSVP, the RSVP message is tunneled.

  The wireless terminal 1 that has received the wired band information 10 from the server 7 creates wireless band information by using the received wired band information 10 (or part of the information). Here, the radio band information refers to information for setting a radio band necessary for transmission of content data requesting the transmission (multicast transmission is also possible) in the radio access network 2.

  The wireless terminal 1 transmits a wireless band setting request including the created wireless band information to the wireless base station 3.

  The radio base station 3 that has received the radio band setting request from the radio terminal 1 sets the band of the radio access network 2 necessary for the transmission of the content data based on the received radio band setting request.

  Next, a band setting method according to an embodiment of the third invention will be described in detail.

  FIG. 4 is a sequence diagram for explaining the band setting method according to the embodiment of the third invention.

  First, a user or an application or the like selects content data 8 such as Internet television or Internet radio on the wireless terminal 1.

  Next, the wireless terminal 1 transmits a content data transmission request for requesting transmission of the selected content data 8 to the server 7 (S1).

  Next, the server 7 that has received the content data transmission request from the wireless terminal 1 uses the database 9 to select the wired band information 10 necessary for transmitting the content data 8 requested to be transmitted, and the selected wired band information. 10 is transmitted to the wireless terminal 1 (S2).

  Next, the server 7 transmits a PATH message in order to perform band setting by RSVP in the wired network 6 (S3).

  Next, a device in the wired network 6 corresponding to RSVP relays the PATH message and finally reaches the wireless terminal 1 (S4, S5).

  Here, since the radio base station 3 does not support RSVP, the PATH message is tunneled.

  Next, on the basis of the wired band information 10 received from the server 7, the wireless terminal 1 that has received the PATH message uses information for setting the band of the wired network 6 required when transmitting content data as a parameter of the RESV message. Then, the RESV message is transmitted to the server 7 (S6).

  The RESV message is relayed by a device in the wired network 6 while reversing the route through which the PATH message was transmitted, and is received by the server 7 (S7, S8).

  When the setting of the wired band by RSVP is completed in the server 7 and all the devices in the wired network 6, the server 7 uses the wireless terminal as a wired band setting response (reservation completion message in the case of RSVP) indicating that the wired band setting has been completed. 1 is transmitted (S9).

  Next, information (wireless) for the wireless terminal 1 that has received the wired band information 10 from the server 7 to set a band required for content data transmission in the wireless access network 2 based on the received wired band information 10. (Band information) is created (S10), and a radio band setting request including the created radio band information is transmitted to the radio base station 3 (S11). The creation of the radio band information will be described later in detail.

  Next, the wireless base station 3 that has received the wireless bandwidth setting request sets the bandwidth requested by the wireless bandwidth setting request between the wireless base station 3 and the wireless terminal 1 in the wireless access network 2 (S12).

  Next, the wireless terminal 1 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is notified by the server 7 as a band setting completion notification that the band setting has been completed. (S13).

  Next, the server 7 that has received the band setting completion notification starts transmission of the content data 8 requested to be transmitted to the wireless terminal 1 (S14).

  When the radio base station 3 detects that the band setting has failed in the radio access network 2 or the wired network 6, the band set in the radio access network 2 and the wired network 6 is released, and the server 7 transmits content. Discontinue.

  As described above, the third embodiment of the present invention uses the wired band information stored in the server, and the wired network band between the wireless base station and the server and the wireless access between the wireless base station and the wireless terminal. Automatically set the network bandwidth. That is, in the embodiment of the third invention, the server has a plurality of content data and wired band information that enables setting of the wired band for each content data, and the content on the server is selected from the wireless terminal. In response to this, the server transmits the wired band information to the wireless terminal and sets the wired band in the wired network with the wireless terminal based on the wired band information. The wireless terminal that has received the wired band information has a function of creating wireless band information necessary for setting a wireless band of a wireless access network with a wireless base station based on the wired band information, Based on the radio band information, the radio base station sets the radio band of the radio access network with the radio terminal. When the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting the content data to the wireless terminal. When the wireless base station detects that the band setting has failed in the wireless access network or the wired network, the band set in the wireless access network and the wired network is released, and the server stops content transmission. This enables the end-to-end network bandwidth between the wireless terminal and the server to be set by setting the bandwidth for each content data to the wireless access network and the wired network based on the wired bandwidth information when content is selected from the wireless terminal. It can be set automatically.

  According to the embodiment of the third invention, the end-to-end network bandwidth between the wireless terminal and the server can be dynamically set only for the content data reception when the content is selected from the wireless terminal. it can.

  Next, a bandwidth setting method according to an embodiment of the fourth invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the fourth invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the first invention is applied, Description is omitted.

  A band setting method according to an embodiment of the fourth invention will be briefly described.

  The wireless terminal 1 in FIG. 1 requests transmission of the selected content data when one or more content data is selected from a plurality of content data 8 stored in the server 7 by a user or an application. The content data transmission request to be transmitted is transmitted to the server 7.

  The server 7 that has received the content data transmission request from the wireless terminal 1 specifies the wireless base station 3 to which the wireless terminal 1 is connected, triggered by this reception. In addition, the wired band information 10 corresponding to the content data 8 requested to be transmitted is selected using the database 9, and the selected wired band information 10 (or a part of the information) is transmitted to the radio base station 3. To do.

  The server 7 transmits the selected wired band information 10 to the wireless terminal 1 and sets a wired band corresponding to the selected wired band information 10 for the wired network 6 between the server 7 and the wireless terminal 1. . Specifically, the wired network devices (including the edge router 4 and the edge router 5) belonging to the server 7 and the wired network 6 are connected in the wired network 6 between the edge router 4 and the server 7 connected to the wireless base station 3. Ensure consistent bandwidth required for content data distribution (multicast distribution is also possible).

  Note that the wireless terminal 1, the server 7, and the wired network device belonging to the wired network 6 in the embodiment of the fourth aspect of the invention secure a consistent bandwidth in the wired network 6 using RSVP (resource Reservation Protocol). Here, since the radio base station 3 does not support RSVP, the RSVP message is tunneled.

  The wireless base station 3 that has received the wired band information 10 from the server 7 creates wireless band information by using the received wired band information 10 (or a part of the information). Here, the radio band information refers to information for setting a radio band necessary for transmission of content data requesting the transmission (multicast transmission is also possible) in the radio access network 2.

  The radio base station 3 sets the band of the radio access network 2 necessary for transmitting content data based on the created radio band information.

  Next, a band setting method according to an embodiment of the fourth invention will be described in detail.

  FIG. 5 is a sequence diagram for explaining a band setting method according to an embodiment of the fourth invention.

  First, a user or an application or the like selects content data 8 such as Internet television or Internet radio on the wireless terminal 1.

  Next, the wireless terminal 1 transmits a content data transmission request for requesting transmission of the selected content data 8 to the server 7 (S1).

  Next, the server 7 that has received the content data transmission request from the wireless terminal 1 uses the database 9 to select the wired band information 10 necessary for transmission of the content data 8 requested to be transmitted. Further, the server 7 specifies the wireless base station 3 to which the wireless terminal 1 is connected (S2), and transmits the selected wired band information 10 to the specified wireless base station 3 (S3).

  Next, the server 7 transmits the selected wired band information 10 to the wireless terminal 1 (S4), and transmits a PATH message to perform band setting by RSVP in the wired network 6 (S5).

  Here, the information transmitted to the wireless terminal 1 and the wireless base station 3 may be a part of the wired band information 10. The order in which the server 7 transmits the wired band information 10 to the wireless base station 3 (S3) and the order in which the wired band information 10 is transmitted to the wireless terminal 1 (S4) are not limited.

  Next, a device in the wired network 6 corresponding to RSVP relays the PATH message and finally reaches the wireless terminal 1 (S6, 7).

  Here, since the radio base station 3 does not support RSVP, the PATH message is tunneled.

  Next, on the basis of the wired band information 10 received from the server 7, the wireless terminal 1 that has received the PATH message uses information for setting the band of the wired network 6 required when transmitting content data as a parameter of the RESV message. Then, the RESV message is transmitted to the server 7 (S8).

  The RESV message is relayed by the device in the wired network 6 while reversing the route through which the PATH message was transmitted, and is received by the server 7 (S9, 10).

  When the setting of the wired band by RSVP is completed in the server 7 and all the devices in the wired network 6, the server 7 uses the wireless terminal as a wired band setting response (reservation completion message in the case of RSVP) indicating that the wired band setting has been completed. 1 is transmitted (S11).

  Next, based on the wired band information 10 received from the server 7 in S3, the wireless base station 3 sets information (wireless band information) for setting a band necessary for content data transmission in the wireless access network 2. Create (S12). Based on the created wireless bandwidth information, the wireless bandwidth of the wireless access network 2 with the wireless terminal 1 is set (S13). The creation of the radio band information will be described later in detail.

  Here, the setting order of the wireless band setting of the wireless access network 2 and the wired band setting of the wired network 6 does not matter. That is, after the wireless base station 3 creates wireless band information based on the wired band information 10 received from the server 7 and sets the wireless band of the wireless access network 2, the server 7 transmits a PATH message to the wireless terminal 1. However, the wired band setting of the wired network 6 may be performed.

  Next, the wireless terminal 1 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is notified by the server 7 as a band setting completion notification that the band setting has been completed. (S14).

  Next, the server 7 that has received the bandwidth setting completion notification starts transmission of the content data 8 requested to be transmitted to the wireless terminal 1 (S15).

  When the radio base station 3 detects that the band setting has failed in the radio access network 2 or the wired network 6, the band set in the radio access network 2 and the wired network 6 is released, and the server 7 transmits content. Discontinue.

  As described above, the fourth embodiment of the present invention uses the wired band information stored in the server, and the wired network band between the wireless base station and the server and the wireless access between the wireless base station and the wireless terminal. Automatically set the network bandwidth. That is, in the embodiment of the fourth invention, the server has a plurality of pieces of content data and wired band information that enables wired band setting for each content data, and the content on the server is selected from the wireless terminal. In response to this, the server specifies a wireless base station to which the wireless terminal is connected, and performs wired band setting corresponding to the wired band information for the wired network with the wireless terminal. The server transmits wired band information to the wireless base station, and the wireless base station that has received the wired band setting information sets the wireless band of the wireless access network with the wireless terminal based on the wired band information. The radio base station performs a radio band setting corresponding to the radio band information in a radio access network with the radio terminal. When the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting the content data to the wireless terminal. When the wireless base station detects that the band setting has failed in the wireless access network or the wired network, the band set in the wireless access network and the wired network is released, and the server stops content transmission. This enables the end-to-end network bandwidth between the wireless terminal and the server to be set by setting the bandwidth for each content data to the wireless access network and the wired network based on the wired bandwidth information when content is selected from the wireless terminal. It can be set automatically.

  According to the embodiment of the fourth invention, the end-to-end network bandwidth between the wireless terminal and the server can be dynamically set only for the content data reception when content is selected from the wireless terminal. it can.

  Next, a bandwidth setting method according to an embodiment of the fifth invention will be described.

  FIG. 6 is a diagram showing an overall configuration of a content providing system to which a bandwidth setting method according to an embodiment of the fifth invention is applied.

  As shown in FIG. 6, a content providing system to which a bandwidth setting method according to an embodiment of the fifth invention is applied includes a wireless terminal 1 and a plurality of wireless terminals 1 via a wireless access network 2. A connected wireless base station 3 (or a plurality of wireless base stations) and a server 7 connected to the wireless base station 3 via a wired network 6 are provided.

  The server 7 stores a plurality of content data 8 such as Internet television and Internet radio, a database 9, and a plurality of wired band information 10. The server 7 also includes a distribution rate management function 11 that can change the distribution rate of the content data 8.

  Here, the content data 8 is a multi-bit rate type content whose distribution rate can be changed, and the wired band information 10 is information related to the band setting of the wired network required for transmission of each content data in the plurality of content data 8. Say. In the embodiment according to the fifth invention, the wired band information 10 includes information on the distribution rate width that can be changed for each content data 8.

  The database 9 also describes the correspondence between each content data and each wired band information.

  Next, a band setting method according to an embodiment of the fifth invention will be briefly described.

  The wireless terminal 1 in FIG. 6 requests transmission of the selected content data when one or more content data is selected from a plurality of content data 8 stored in the server 7 by a user or an application. The content data transmission request to be transmitted is transmitted to the server 7.

  The server 7 that has received the content data transmission request from the wireless terminal 1 specifies the wireless base station 3 to which the wireless terminal 1 is connected, triggered by this reception. In addition, the wired band information 10 corresponding to the content data 8 requested to be transmitted is selected using the database 9, and the selected wired band information 10 (or a part of the information) is transmitted to the radio base station 3. To do. The wired band information 10 includes information (set band value) regarding the value of the wired band set in the wired network 6, but here, the band value that maximizes the distribution rate of the content data 8 is the set band. It is set as a value.

  Further, the server 7 sets a wired band corresponding to the selected wired band information 10 for the wired network 6 with the wireless base station 3. Specifically, wired network devices (including edge router 4 and edge router 5) belonging to the wireless base station 3, the server 7, and the wired network 6 have contents in the wired network 6 between the wireless base station 3 and the server 7. Ensure consistent bandwidth required for data distribution (multicast distribution is also possible).

  Note that the wireless base station 3, the server 7, and the wired network device belonging to the wired network 6 in the embodiment of the fifth invention secure a consistent band in the wired network 6 by using RSVP (resource Reservation Protocol). However, the present invention does not limit the method of ensuring a consistent band in the wired network 6 to a method using RSVP.

  The wireless base station 3 that has received the wired band information 10 from the server 7 creates wireless band information by using the received wired band information 10 (or a part of the information). Here, the radio band information refers to information for setting a radio band necessary for transmission of content data requesting the transmission (multicast transmission is also possible) in the radio access network 2.

  The radio base station 3 sets the band of the radio access network 2 necessary for transmitting content data based on the created radio band information.

  When the wireless base station 3 detects that the band setting in the wireless access network 2 or the wired network 6 has failed, the wireless base station 3 transmits a band setting failure to the server 7 as a band setting failure notification.

  Here, the band setting failure notification includes a settable band value that is information on a band that can be set in the wireless access network 2 or the wired network 6 in which the band setting has failed.

  The server 7 that has received the bandwidth setting failure notification determines whether the settable bandwidth value is within the range of the distribution rate width included in the wired bandwidth information 10, and if included in the distribution rate width, the distribution rate management function 11 Thus, the distribution rate is changed to a distribution rate corresponding to the settable band value, and the set band value of the wired band information 10 is changed to the settable band value.

  Further, the server 7 again sets the bandwidth of the wired network 6 and the wireless access network 2 based on the changed wired bandwidth information 10.

  Next, a band setting method according to an embodiment of the fifth invention will be described in detail.

  FIG. 7 is a sequence diagram for explaining the band setting method according to the embodiment of the fifth invention.

  First, a user or an application or the like selects content data 8 such as Internet television or Internet radio on the wireless terminal 1.

  Next, the wireless terminal 1 transmits a content data transmission request for requesting transmission of the selected content data 8 to the server 7 (S1).

  Next, the server 7 that has received the content data transmission request from the wireless terminal 1 uses the database 9 to select the wired band information 10 necessary for transmission of the content data 8 requested to be transmitted. Further, the server 7 specifies the wireless base station 3 to which the wireless terminal 1 is connected (S2), and transmits the selected wired band information 10 to the specified wireless base station 3 (S3). Here, the content data 8 is multi-bit rate type content whose distribution rate can be changed, and the wired band information 10 includes information on the distribution rate width which can be changed. In addition, a value that maximizes the distribution rate is set in the set band value included in the wired band information 10. The information transmitted to the radio base station 3 may be a part of the wired band information 10.

Subsequent bandwidth setting of the wired network 6 and the wireless access network 2 is performed in the same manner as in the first embodiment (S4 to S12).
When the wireless base station 3 detects that the band setting in the wireless access network 2 or the wired network 6 has failed, the wireless base station 3 transmits a band setting failure to the server 7 as a band setting failure notification (S13). Here, as described above, the band setting failure notification includes a settable band value that is information of a band that can be set in the wireless access network 2 or the wired network 6 in which the band setting has failed.

  The server 7 that has received the bandwidth setting failure notification determines whether the settable bandwidth value is within the range of the distribution rate width included in the wired bandwidth information 10 (S14), and if included in the distribution rate width, The management function 11 changes the distribution rate to a distribution rate corresponding to the settable band value (S15), and changes the set band value of the wired band information 10 to the settable band value (S16).

  Next, band setting of the wired network 6 and the wireless access network 2 is performed again based on the changed wired band information 10 (S17 to S26). This band setting procedure is the same as S3 to S12.

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is sent to the server as a band setting completion notification that the band setting has been completed. 7 is transmitted (S27).

  Then, the server 7 that has received the bandwidth setting completion notification starts transmission of the content data 8 requested to be transmitted at the distribution rate changed to the wireless terminal 1 (S28).

  As described above, in the fifth embodiment, the content data is multi-bit rate type content whose distribution rate can be changed, and the wired band information is content. The server includes a distribution rate management function that can change the distribution rate of content data, including information on the distribution rate width that can be changed for each data. When content is selected from the wireless terminal, bandwidth setting is performed with the maximum distribution rate. When the wireless base station or the wireless terminal detects that the band setting has failed in the wireless access network or the wired network, the wireless base station or the wireless terminal has a function of notifying the server of the band setting failure, A settable bandwidth value, which is information about a bandwidth that can be set for a wireless access network or a wired network in which the bandwidth setting has failed, is included. The server that has received the notification determines whether the settable bandwidth value is within the range of the distribution rate width included in the wired bandwidth information, and if it is included in the distribution rate width, the distribution rate is set by the distribution rate management function. While changing to a possible bandwidth value, the setting bandwidth value of wired bandwidth information is changed to a configurable bandwidth value. The server and the wireless base station or wireless terminal perform bandwidth setting for the wired network and the wireless access network again based on the changed wired bandwidth information. When the wireless base station or the wireless terminal detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting content data at the distribution rate to the wireless terminal. As a result, even if the band setting fails, the band can be reset with the band that can be currently set, and the content can be distributed.

  As described above, in the embodiment according to the fifth invention, when there is a content data transmission request from the wireless terminal 1 to the server 7, the wireless data transmission rate between the wireless terminal 1 and the server 7 is maximized so that the distribution rate of the content data is maximized. Try to set the end-to-end network bandwidth. In the embodiment according to the fifth invention, when the setting of the band that maximizes the distribution rate of the content data fails, the band corresponding to the maximum distribution rate within the settable band range is set to the wireless network 2. And dynamically set to the wired network 6 to perform content distribution at this maximum distribution rate.

  Next, a bandwidth setting method according to an embodiment of the sixth invention will be described.

  FIG. 8 is a diagram showing an overall configuration of a content providing system to which a bandwidth setting method according to an embodiment of the sixth invention is applied.

  As shown in FIG. 8, a content providing system to which a bandwidth setting method according to an embodiment of the sixth invention is applied includes a wireless terminal 1 (or a plurality of wireless terminals) and a wireless access network 2 connected to the wireless terminal 1. A connected wireless base station 3 (or a plurality of wireless base stations) and a server 7 connected to the wireless base station 3 via a wired network 6 are provided.

  The wireless base station 3 is provided with a wireless bandwidth monitoring function 12 that can grasp the bandwidth status of the wireless access network 2.

  The server 7 stores a plurality of content data 8 such as Internet television and Internet radio, a database 9, and a plurality of wired band information 10. The server 7 also has a distribution rate management function 11 that can change the distribution rate of the content data 8, a wired band monitoring function 13 that can grasp the band status of the wired network 6, a wireless band monitoring function 12, and a wired band monitoring function 13. And a bandwidth management function 14 capable of managing the bandwidth status of both the wireless access network 2 and the wired network 6.

  Here, the content data 8 is a multi-bit rate type content whose distribution rate can be changed, and the wired band information 10 is information related to the band setting of the wired network required for transmission of each content data in the plurality of content data 8. Say. In the embodiment according to the sixth invention, the wired bandwidth information 10 includes information on the distribution rate width that can be changed for each content data 8.

  The database 9 also describes the correspondence between each content data and each band information.

  Next, a band setting method according to an embodiment of the sixth invention will be briefly described.

  The bandwidth management function 14 grasps the bandwidth status of the wireless access network 2 and the wired network 6 by communicating with the wireless bandwidth monitoring function 12 and the wired bandwidth monitoring function 13.

  When the wireless terminal 1 desires to receive the content data 8, the wireless terminal 1 selects the content data 8 in the server 7. The server 7 specifies the wired band information 10 necessary for receiving the content data 8 using the database 9. Here, the content data 8 is multi-bit rate type content whose distribution rate can be changed, and the wired band information 10 includes information of the distribution rate width R which can be changed.

  The band management function 14 calculates the maximum distribution rate R (1) that can be currently set from the distribution rate width R of the wired band information 10 and the band status obtained from the wireless band monitoring function 12 and the wired band monitoring function 13.

  The band management function 14 sets the distribution rate information of the wired band information 10 to the distribution rate R (1), and the distribution rate management function 11 sets the content distribution rate to the distribution rate R (1).

  The server 7 specifies the wireless base station 3 to which the wireless terminal 1 is connected, and transmits the wired band information 10 to the specified wireless base station 3. Here, the information transmitted to the radio base station 3 may be a part of the wired band information 10.

  Subsequent bandwidth settings for the wired network 6 and the wireless access network 2 are the same as in the first embodiment.

  The wireless base station 3 that has detected that the wireless band setting of the wireless access network 2 and the wired band setting of the wired network 6 have been completed transmits to the server 7 as a band setting completion notification that the band setting has been completed.

  The server 7 that has received the bandwidth setting completion notification starts transmission of the selected content data 8 to the wireless terminal 1 at the distribution rate R (1) set in the distribution rate management function 11.

  Next, a band setting method according to an embodiment of the sixth invention will be described in detail.

  FIG. 9 is a sequence diagram for explaining a band setting method according to an embodiment of the sixth invention.

  First, the wireless bandwidth monitoring function 12 of the wireless base station 3 transmits the wireless bandwidth status obtained by monitoring the wireless access network 2 to the server 7 (S1).

  Next, the wired bandwidth monitoring function 13 of the server 7 transmits the wired bandwidth status obtained by monitoring the wired network 6 to the bandwidth management function 14 of the server 7 (S2).

  Next, the bandwidth management function 14 grasps the bandwidth status of the wireless access network 2 and the wired access network 6 based on the wireless bandwidth status received from the wireless bandwidth monitoring function 12 and the wired bandwidth status received from the wired bandwidth monitoring function 13 ( S3).

  Next, a user or an application selects content data 8 desired to be transmitted on the wireless terminal 1 such as Internet television or Internet radio.

  Next, the wireless terminal 1 transmits a content data transmission request for requesting transmission of the selected content data 8 to the server 7 (S4).

  Next, the bandwidth management function 14 of the server 7 selects the wired bandwidth information 10 necessary for receiving the content data 8 requested to be transmitted from the wireless terminal 1 by using the database 9, and the selected wired bandwidth information. The maximum distribution rate R (1) that can be set at present is calculated from the distribution rate width R of 10 and the bandwidth status obtained from the wireless bandwidth monitoring function 12 and the wired bandwidth monitoring function 13 (S5).

  Next, the bandwidth management function 14 of the server 7 sets the distribution rate information of the wired bandwidth information 10 to the distribution rate R (1) (S6), and the distribution rate management function 11 sets the distribution rate of the content to the distribution rate R (1). 1) is set (S7).

Next, the server 7 identifies the wireless base station 3 to which the wireless terminal 1 is connected (S8), and transmits the wired band information 10 with the distribution rate information set to R (1) to the identified wireless base station 3. (S9).
Here, the content data 8 is multi-bit rate type content whose distribution rate can be changed, and the wired band information 10 includes information on the distribution rate width which can be changed. Further, in the set band value included in the wired band information 10, a band value for setting the distribution rate to R (1) is set. Note that the information transmitted to the radio base station 3 may be a part of the wired band information 10.

  Subsequent bandwidth settings for the wired network 6 and the wireless access network 2 are the same as in the first embodiment (S9 to S18).

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the wireless band setting of the wireless access network 2 has been completed is sent to the server as a band setting completion notification that the band setting has been completed. 7 is transmitted (S19).

  Then, the server 7 that has received the bandwidth setting completion notification sets the transmission of the content data 8 requested to be transmitted to the wireless terminal 1 in the distribution rate management function 11 (S7), starting with the distribution rate R (1) (S20).

  As described above, the embodiment of the sixth invention is the embodiment of any one of the first to fourth inventions, wherein the radio base station has a radio bandwidth monitoring function capable of monitoring the bandwidth status of the radio access network, The server has a wired bandwidth monitoring function that can monitor the bandwidth status of the wired network. The server communicates with the wireless bandwidth monitoring function and the wired bandwidth monitoring function, and has a bandwidth management function capable of managing the bandwidth status of the wireless access network and the wired network. The content data is multi-bit rate type content whose distribution rate can be changed, the wired band information includes information on the distribution rate width that can be changed for each content data, and the server has a distribution rate management function that can change the distribution rate of the content data . When content is selected from the wireless terminal, the server calculates a settable bandwidth value that is a bandwidth that can be set for the wireless access network and the wired network from the bandwidth management function, and the distribution rate that includes the configurable bandwidth value in the wired bandwidth information. If the width is within the range, the bandwidth setting of the wired network and the wireless access network is performed with the settable bandwidth value, and the distribution rate is changed to the settable bandwidth value by the distribution rate management function. When the wireless terminal or the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server starts transmitting content data at the distribution rate set for the wireless terminal. As a result, it is possible to distribute content at a maximum distribution rate that can be band-set in the wireless access network and the wired network.

  As described above, according to the embodiment of the sixth invention, in the end-to-end network between the wireless terminal 1 and the server 7, when the content is selected from the wireless terminal 1, it is within the range of the currently settable bandwidth. The bandwidth corresponding to the maximum distribution rate in the network can be dynamically set in the wireless network 2 and the wired network 6, and the content distribution can be performed at the maximum distribution rate within the currently settable bandwidth range.

  Next, a bandwidth setting method according to an embodiment of the seventh invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the seventh invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the sixth invention is applied, Description is omitted.

  In the embodiment of the seventh invention, the bandwidth management function 14 of the server 7 communicates with the wireless bandwidth monitoring function 12 and the wired bandwidth monitoring function 13 during content data transmission, and the bandwidth of the wireless access network 2 and the wired network 6. Manage the situation.

  When the bandwidth management function 14 of the server 7 determines that the set bandwidth of the wireless access network 2 and the wired network 6 can be increased and the distribution rate can be increased to R (2), the distribution rate information of the wired bandwidth information 10 is obtained. The distribution rate is reset to R (2), and the setting bands of the wireless access network 2 and the wired network 6 are reset to R (2).

  The wireless base station 3 that has detected that the wireless band setting of the wireless access network 2 and the wired band setting of the wired network 6 have been completed transmits a band setting completion notification to the server 7 as a band setting completion notification, and the band setting is completed. The server 7 that has received the notification resets the content distribution at the distribution rate R (2) reset by the bandwidth management function 14 to the distribution rate management function 11, and distributes the content data 8 at the distribution rate R (2). Start.

  Next, a band setting method according to an embodiment of the seventh invention will be described in detail.

  FIG. 10 is a sequence diagram for explaining the band setting method according to the embodiment of the seventh invention.

  When the wireless terminal 1 receives the content data 8, the operation until the server 7 transmits the content data 8 after setting the bandwidth of the wired network 6 and the wireless access network 2 using the wired bandwidth information 10 is the sixth invention. This is the same as the case of the embodiment (S1 to S20).

  Next, during content data transmission, the radio band monitoring function 12 of the radio base station 3 transmits the radio band status obtained by monitoring the radio access network 2 to the server 7 (S21).

  Next, during the content data transmission, the wired bandwidth monitoring function 13 of the server 7 transmits the wired bandwidth status obtained by monitoring the wired network 6 to the bandwidth management function 14 of the server 7 (S22).

  Next, the bandwidth of the wireless access network 2 and the wired access network 6 during content data transmission is determined by the bandwidth management function 14 according to the wireless bandwidth status received from the wireless bandwidth monitoring function 12 and the wired bandwidth status received from the wired bandwidth monitoring function 13. The situation is grasped (S23).

  Next, when the bandwidth management function 14 of the server 7 determines that the set bandwidth of the wireless access network 2 and the wired network 6 can be increased and the distribution rate can be increased to R (2) (S24), the wired bandwidth information The ten delivery rate information is reset to the delivery rate R (2) (S25).

  Next, based on the wired band information 10 in which the distribution rate information is reset to the distribution rate R (2), band setting of the wired network 6 and the wireless access network 2 is performed again (S26 to S35). This band setting procedure is the same as S9 to S18.

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the band setting of the radio access network 2 has been completed, notifies the server 7 that the band setting has been completed as a band setting completion notification. It transmits to (S36).

  Next, the distribution rate management function 11 of the server 7 resets the distribution rate of the content data to R (2) (S37).

  Then, the server 7 that has received the bandwidth setting completion notification starts transmission of the content data 8 requested to be transmitted at the distribution rate R (2) changed to the wireless terminal 1 (S38).

  In the present invention, the distribution rate resetting (S37) by the distribution rate management function can be performed before the band resetting (S26 to S36). However, as in the above-described embodiment, if the distribution rate resetting (S37) by the distribution rate management function is performed after the band resetting (S26 to S36), the distribution rate is increased, but this distribution rate is supported. It is possible to prevent a situation in which the bandwidth is not secured in the network, and as a result, the network is congested and the content quality deteriorates due to data delay / discard.

  As described above, the embodiment of the seventh invention is the same as the embodiment of the sixth invention, in which the bandwidth management function communicates with the wireless bandwidth monitoring function and the wired bandwidth monitoring function during content data transmission, and the wireless access network and Manage the bandwidth status of wired networks. When the bandwidth management function determines that the set bandwidth of the wireless access network and wired network can be increased, the bandwidth management function compares the distribution rate width included in the wired bandwidth information with the current distribution rate from the distribution rate management function, When it is determined that the distribution rate can be increased within the distribution rate range, the setting information of the band included in the wired band information is changed, and the setting band of the wireless access network and the wired network is changed based on the wired band information. . When the wireless terminal or the wireless base station detects that the band setting has been completed in the wireless access network and the wired network, the server increases the distribution rate by the distribution rate management function and starts transmitting content data to the wireless terminal. This makes it possible to increase the content data distribution rate in accordance with the bandwidth status of the wireless access network and the wired network.

  Thus, according to the embodiment of the seventh invention, when the distribution rate can be increased in view of the bandwidth status of the wireless access network 2 and the wired network 6, the network setting bandwidth is dynamically reset, Content can be distributed at a higher distribution rate.

  Next, a band setting method according to an embodiment of the ninth invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the ninth invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the sixth invention is applied, Description is omitted.

  In the embodiment of the ninth invention, the bandwidth management function 14 communicates with the wireless bandwidth monitoring function 12 and the wired bandwidth monitoring function 13 during content data transmission, and manages the bandwidth status of the wireless access network 2 and the wired network 6. doing.

  The bandwidth management function 14 determines that it is difficult to secure the set bandwidth in the wireless access network 2 or the wired network 6 and determines that the distribution rate R (1) can be lowered within the range of the distribution rate width R of the wired bandwidth information 10. In this case, the distribution rate information of the wired band information 10 is reset to the distribution rate R (3), and the distribution rate of the content data 8 is set to the distribution rate R (3).

  The distribution rate management function 11 set to distribute at the distribution rate R (3) starts distributing the content data 8 at the distribution rate R (3).

  Further, the server 7 resets the set bandwidth of the wireless access network 2 and the wired network 6 to R (3).

  The wireless base station 3 that has detected that the wireless band setting of the wireless access network 2 and the wired band setting of the wired network 6 have been completed transmits to the server 7 as a band setting completion notification that the band setting has been completed.

  Next, a band setting method according to an embodiment of the ninth invention will be described in detail.

  FIG. 11 is a sequence diagram for explaining a band setting method according to an embodiment of the ninth invention.

  When the wireless terminal 1 receives the content data 8, the operation until the server 7 transmits the content data 8 after setting the bandwidth of the wired network 6 and the wireless access network 2 using the wired bandwidth information 10 is the sixth invention. This is the same as the case of the embodiment (S1 to S20).

  Next, during content data transmission, the radio band monitoring function 12 of the radio base station 3 transmits the radio band status obtained by monitoring the radio access network 2 to the server 7 (S21).

  Next, during the content data transmission, the wired bandwidth monitoring function 13 of the server 7 transmits the wired bandwidth status obtained by monitoring the wired network 6 to the bandwidth management function 14 of the server 7 (S22).

  Next, the bandwidth of the wireless access network 2 and the wired access network 6 during content data transmission is determined by the bandwidth management function 14 according to the wireless bandwidth status received from the wireless bandwidth monitoring function 12 and the wired bandwidth status received from the wired bandwidth monitoring function 13. The situation is grasped (S23).

  Next, it is difficult for the bandwidth management function 14 of the server 7 to secure the set bandwidth in the wireless access network 2 or the wired network 6, and the distribution rate R (1) is within the range of the distribution rate width R of the wired bandwidth information 10. If it is determined that it can be lowered (S24), the distribution rate information of the wired band information 10 is reset to the distribution rate R (3) (S25).

  Next, the distribution rate management function 11 resets the distribution rate of the content data 8 to the distribution rate R (3) (S26).

  Next, the server 7 starts distributing the content data 8 at the distribution rate R (3) (S27).

  Next, based on the wired band information 10 in which the distribution rate information is reset to the distribution rate R (3), the band setting of the wired network 6 and the wireless access network 2 is performed again (S28 to S37). This band setting procedure is the same as S9 to S18.

  Next, the wireless base station 3 that has received the wired band setting response from the server 7 and has detected that the band setting of the radio access network 2 has been completed, notifies the server 7 that the band setting has been completed as a band setting completion notification. It transmits to (S38).

  In the present invention, the distribution rate resetting (S26) by the distribution rate management function can be performed after the band resetting (S28 to S38). However, as in the above-described embodiment, if the delivery rate resetting (S26) by the delivery rate management function is performed before the bandwidth resetting (S28 to S38), the delivery rate is set according to the network congestion status. It can be lowered quickly.

  As described above, the ninth aspect of the present invention is the same as the sixth aspect of the present invention, wherein the bandwidth management function communicates with the wireless bandwidth monitoring function and the wired bandwidth monitoring function during content data transmission, and the wireless access network and Manage the bandwidth status of wired networks. If the bandwidth management function determines that it is difficult to secure the set bandwidth in the wireless access network or wired network, the bandwidth management function compares the distribution rate width included in the wired bandwidth information with the current distribution rate from the distribution rate management function. When the server determines that the distribution rate can be lowered within the distribution rate range, the server lowers the distribution rate from the distribution rate management function, changes the setting information of the band included in the wired band information, and based on the wired band information. Change the setting band of the wireless access network and wired network. As a result, the content data distribution rate can be lowered in accordance with the bandwidth status of the wireless access network or the wired network.

  As described above, according to the embodiment of the ninth invention, when it is difficult to secure the set bandwidth in view of the bandwidth status of the wireless access network 2 and the wired network 6, the content data distribution rate is lowered and the network Re-setting the set bandwidth enables effective use of the bandwidth.

  Next, a band setting method according to an embodiment of the eleventh invention will be described.

  Since the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the eleventh invention is applied is the same as the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the first invention is applied, Description is omitted.

  Next, a band setting method according to an embodiment of the eleventh invention will be described in detail.

  FIG. 12 is a sequence diagram for explaining a band setting method according to an embodiment of the eleventh invention.

  Since S1 to S14 in the embodiment of the eleventh invention are the same as S1 to S14 in the embodiment of the first invention, description thereof will be omitted.

  When receiving the content data 8 and detecting stop of reception (S15), the wireless terminal 1 transmits a wireless band change request to the wireless base station 3 (S16). Here, the wireless band change request refers to the wireless base station 3 from the wireless band set by the wireless base station 3 based on the wireless band information, between the wireless base station 3 and the wireless terminal 1 in the wireless access network 2. Is a signal requesting to change to a radio band before setting based on radio band information.

  The radio base station 3 that has received the radio band change request changes the band of the radio access network 2 with the radio terminal 1 to the band before setting based on the radio band information (S17). Here, when the band before setting based on the radio band information is in the released state, the radio base station 3 releases the band of the radio access network 2.

  Each device of the wired network 6 performs band setting by RSVP, but RSVP periodically transmits and receives messages to update the state of each device. Therefore, when the content data is not received for a predetermined time or more, each device of the wired network 6 automatically releases the wired band (S18), and returns the network state to the state before the band setting by RSVP. .

  As described above, the embodiment of the eleventh invention is the same as the embodiments of the first invention to the ninth embodiment, in which the bandwidth setting of the wireless access network and the wired network is completed, and the server becomes a wireless terminal. On the other hand, when the wireless terminal detects that the reception of the content data is stopped in a state where the wireless terminal receives the content data transmitted by the server after starting the transmission of the content data, The station changes the band of the radio access network with the radio terminal to a band before setting the band corresponding to the radio band information. After detecting that the reception of the content data is stopped, the wired network releases the reserved wired band if the content data is not received for a predetermined time. Thereby, after the reception of the content data is stopped, it is possible to return to the network state before the band setting.

  Thus, according to the embodiment of the eleventh invention, after the reception of the content data is stopped, the network state can be automatically returned to the state before the band setting.

  Next, a band setting method according to an embodiment of the twelfth invention will be described.

  FIG. 13 is a diagram showing an overall configuration of a content providing system to which a bandwidth setting method according to an embodiment of the twelfth invention is applied.

  The configuration of the content providing system to which the bandwidth setting method according to the embodiment of the twelfth invention is applied includes the following in addition to the configuration of the content providing system to which the bandwidth setting method according to the embodiment of the first invention is applied. It has a configuration.

  That is, the wired bandwidth information 10 includes bandwidth reservation time information 15 that enables setting of bandwidth reservation times for the wired network 6 and the wireless access network 2.

  In addition, the wireless base station 3 uses the bandwidth information 10 (or a part of the information) received from the server 7 to provide the bandwidth of the wireless access network 2 required for content data distribution (multicast distribution is also possible). And the function of creating the radio band information necessary for setting the band securing time, and the function of setting the band of the radio access network 2 and the band securing time necessary for the content data distribution based on the radio band information Have

  Further, the wireless base station 3 has a timer 16 for measuring the bandwidth securing time at the same time when the server 7 starts transmitting the content to the wireless terminal 1. Before transmitting a content transmission stop request for requesting transmission stop and setting the radio band of the radio access network 2 with the radio terminal 1 from the radio band set based on the radio band information based on the radio band information It has a function to change to a wireless band.

  Next, a band setting method according to an embodiment of the twelfth invention will be described in detail.

  FIG. 14 is a sequence diagram for explaining a band setting method according to an embodiment of the twelfth invention.

  Since S1 to S14 in the embodiment of the twelfth invention are the same as S1 to S14 in the embodiment of the first invention (however, it is possible to set the reserved time of the band of the radio access network 2 in the radio band information) This is different in that the bandwidth reservation time information 15 is included.

  The wireless base station 3 that has detected the start of content transmission from the server 7 to the wireless terminal 1 starts a timer 16 that measures the time of the bandwidth reservation time information 15 (S15).

  When the radio base station 3 detects that the timer has expired (S16), the radio base station 3 transmits a content transmission stop request for stopping the transmission of content to the server 7 (S17) and performs wireless access with the radio terminal 1 The wireless band of the network 2 is changed from the wireless band set based on the wireless band information to the wireless band before being set based on the wireless band information (S18). Here, when the band before setting based on the radio band information is in the released state, the radio base station 3 releases the band of the radio access network 2.

  The order in which the wireless base station 3 transmits a content transmission stop request to the server 7 (S17) and the order in which the wireless band of the wireless access network 2 is changed (S18) do not matter.

  Receiving the content transmission stop request, the server 7 stops the content transmission (S19). Here, each device of the wired network 6 performs band setting by RSVP, but RSVP periodically transmits and receives messages to update the state of each device. When the content data is not received for a predetermined time or more, each device of the wired network 6 automatically releases the band (S20), and returns the network state to the state before the band setting by RSVP.

  As described above, the embodiment of the twelfth invention is the same as the embodiments of the first invention to the embodiment of the ninth invention in that the wired band information is set based on the wired network and the wireless access network. Bandwidth reservation time information that enables setting of the bandwidth reservation time for the wireless terminal or wireless base station when creating the wireless bandwidth information, the bandwidth is based on the bandwidth reservation time information in addition to the wireless access network wireless bandwidth. The wireless base station has a function of creating wireless band information that can also set the reserved time, and the wireless base station sets the wireless band of the wireless access network and the band reserved time with the wireless terminal based on the wireless band information. When the wireless base station or the wireless terminal detects that the band setting is completed in the wireless access network and the wired network, the server starts transmitting the content data to the wireless terminal, and the wireless base station transmits the content data wirelessly. At the same time as transmission to the terminal is started, a timer for measuring the bandwidth securing time is started. When it is detected that the timer has expired, a content transmission stop request is transmitted to the server, and the bandwidth of the wireless access network with the wireless terminal is set based on the wireless bandwidth information from the bandwidth set based on the wireless bandwidth information. The server changes to the band before setting, and the server that has received the content transmission stop request stops content transmission. After detecting that the reception of the content data is stopped, the wired network releases the reserved wired band if the content data is not received for a predetermined time. As a result, it is possible to return to the network state before the bandwidth setting after the time determined by the bandwidth reservation time information has elapsed.

  Thus, according to the embodiment of the twelfth aspect of the present invention, the bandwidth set end-to-end between the wireless terminal 1 and the server 7 when the time determined by the bandwidth reservation time information has elapsed since the start of content reception. Can be automatically returned to the state before setting.

  In the tenth embodiment, the radio base station 3 includes a timer, but the radio terminal 1 may include a timer. In this case, the radio terminal 1 and the radio base station 3 operate as follows.

  When the wireless terminal 1 starts receiving the content data from the server 7, the wireless terminal 1 starts a timer that measures the time of the bandwidth reservation time information. Here, the bandwidth reservation time information may be included in the wireless band information created by the wireless terminal 1, or the wireless base station 3 changes the wireless terminal 1 to the wireless terminal 1 when setting the wireless band based on the wireless band information. It may be transmitted.

  When the wireless terminal 1 detects that the timer has expired, the wireless terminal 1 transmits a content transmission stop request for stopping the transmission of content to the server 7 and wirelessly transmits the wireless band of the wireless access network 2 with the wireless terminal 1. A radio band change request is transmitted to the radio base station 3 for requesting to change from the radio band set based on the band information to the radio band set based on the radio band information.

  The radio base station 3 changes the band of the radio access network 2 with the radio terminal 1 to a band before setting based on the radio band information in response to a radio band change request from the radio terminal 1.

  As described above, according to the embodiments of the first invention to the fourth invention, it is not necessary for the user to check and set the bandwidth necessary for content reception in advance, and it is possible to automatically select only the content. In addition, the wireless access network band between the wireless terminal and the wireless base station and the wired network band between the wireless base station and the server are dynamically set end-to-end only for the band required for the content, and the content is received. Is possible. Here, since any band of the wireless access network and the wired network can be set by the band setting information of the wired network, it is not necessary to create the band setting information for each wireless system. As a result, the server administrator does not need to recreate the band setting information in accordance with the change of the wireless system used for the wireless access network.

  According to the fifth to twelfth embodiments of the present invention, when the content data is a multi-bit rate type content whose distribution rate can be changed, it is adapted to the bandwidth status of the wireless access network and the wired network. Content can be distributed at an optimal distribution rate, and the reserved bandwidth set in the wireless access network and the wired network can be dynamically changed in accordance with the distribution rate.

  Further, according to the fifth to twelfth embodiments, the radio base station predicts the status of the radio access network, thereby increasing the processing load on the radio terminal and the bandwidth consumed by the radio access network. It is possible to change the delivery rate quickly without making it happen.

  Furthermore, according to the embodiments of the first invention to the twelfth invention, it is possible to dynamically change the set bandwidth of the wireless access network and the wired network in accordance with the change of the delivery rate, so that the delivery rate can be changed. When the distribution rate is increased, stable data distribution can be performed at the changed distribution rate, and when the distribution rate is decreased, the problem of securing more bandwidth than necessary can be solved.

  Hereinafter, the creation of the radio band information in the embodiments of the first invention to the twelfth invention will be described with specific examples.

  FIG. 15 is a diagram illustrating a first example of a method of creating wireless band information. FIG. 15 shows a case where the wireless band information for content A is created based on the wired band information for content A. As shown in FIG. 15, in the first example, the wireless band information is created by extracting only the parameters necessary for the wireless band setting from the parameters of the wired band information. Specifically, the wired bandwidth information includes a set bandwidth value (up), a set bandwidth value (down), a peak rate, a maximum packet size, a minimum packet size, a maximum allowable delay value, a bandwidth reservation time, a duration, a service class, It consists of information on the presence / absence of MC support and the presence / absence of retransmission. Then, from this wired band information, information on the set band value (up), set band value (down), minimum packet size, duration, MC support, and retransmission information is extracted to create radio band information. To do.

  FIG. 16 is a diagram illustrating a second example of a method of creating wireless band information. FIG. 16 shows a case where the wireless band information for content A is created based on the wired band information for content A. As shown in FIG. 16, in the second example, the wireless band information is created by converting the parameters of the wired band information into parameters necessary for setting the wireless band by a predetermined calculation or the like. Specifically, the wired bandwidth information includes a set bandwidth value (up), a set bandwidth value (down), a peak rate, a maximum packet size, a minimum packet size, a maximum allowable delay value, a bandwidth reservation time, a duration, a service class, It consists of information about the presence or absence of MC support and the presence or absence of retransmission. Then, the set band value (up), the set band value (down), and the duration included in the wired band information are preliminarily set to calculate a radio band value (up), a radio band, which is a parameter of the radio band information. Convert to value (down) and timer value. Also, the information about the service class and the presence / absence of retransmission included in the wired band information is converted into information about the class using a preset conversion table.

  Note that the method of creating the wireless band information is not limited to the above. For example, the first example and the second example may be combined.

It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 1st invention. It is a figure which shows the whole structure of the content provision system to which the band setting method based on the Example of 1st invention was applied. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 2nd invention. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 3rd invention. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 4th invention. It is a figure which shows the whole structure of the content provision system to which the band setting method based on the Example of 5th invention was applied. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 5th invention. It is a figure which shows the whole structure of the content provision system to which the band setting method based on the Example of 6th invention was applied. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 6th invention. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 7th invention. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 8th invention. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 9th invention. It is a figure which shows the whole structure of the content provision system to which the band setting method based on the Example of 10th invention was applied. It is a sequence diagram for demonstrating the zone | band setting method based on the Example of 10th invention. It is a figure which shows the 1st example of the production method of radio band information. It is a figure which shows the 2nd example of the production method of radio band information.

Explanation of symbols

1 wireless terminal 2 wireless access network 3 wireless base station 4 edge router 5 edge router 6 wired network 7 server 8 content data 9 database 10 wired bandwidth information 11 distribution rate management function 12 wireless bandwidth monitoring function 13 wired bandwidth monitoring function 14 bandwidth management function 15 Bandwidth reservation time information 16 Timer

Claims (13)

A band setting method in a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. ,
When the wireless terminal selects one or more content data from among a plurality of content data stored in the server, the server sends a content data transmission request for requesting transmission of the selected content data. Sending to
When the server receives the content data transmission request from the wireless terminal, identifying a wireless base station to which the wireless terminal is connected;
The server transmitting, to the identified wireless base station, wired band information related to band setting of the wired network required for transmission of the content data requested to be transmitted;
The server performs processing necessary for setting a wired band corresponding to the wired band information for a wired network with the wireless base station, and transmits a wired band setting response to the wireless base station. Steps,
When the wireless base station receives the wired band information from the server, a wireless band necessary for setting a wireless band of the wireless access network with the wireless terminal based on the wired band information Creating information,
The radio base station setting a radio band of the radio access network with the radio terminal based on the radio band information; and
When the wireless base station receives the wired band setting response and detects that the wireless band setting is completed, the band setting is completed to notify completion of band setting in the wireless access network and the wired network. Sending a notification to the server;
When the server receives the bandwidth setting completion notification from the wireless base station, each of the content data requested to be transmitted from the wireless terminal, to the wireless terminal,
A band setting method characterized by comprising: A band setting method in a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. ,
When the wireless terminal selects one or more content data from among a plurality of content data stored in the server, the server sends a content data transmission request for requesting transmission of the selected content data. Sending to
When the server receives the content data transmission request from the wireless terminal, identifying a wireless base station to which the wireless terminal is connected;
The server has a wired band corresponding to wired band information related to a band setting of the wired network required for transmitting the content data requested to be transmitted to the wired network with the identified wireless base station. Performing processing necessary for setting, and transmitting a wired band setting response to the wireless base station;
The server transmitting the wired band information to the wireless terminal;
When the wireless terminal receives the wired band information from the server, a wireless band necessary for setting a wireless band of the wireless access network with the wireless base station based on the wired band information Creating information,
The wireless terminal transmitting a wireless band setting request based on the wireless band information requesting setting of a wireless band in the wireless access network to the wireless base station;
When the radio base station receives the radio band setting request from the radio terminal, according to the received radio band setting request, between the radio base station and the radio terminal in the radio access network Setting a radio band requested to be set; and
When the wireless base station receives the wired band setting response and detects that the wireless band setting is completed, the band setting is completed to notify completion of band setting in the wireless access network and the wired network. Sending a notification to the server;
When the server receives the bandwidth setting completion notification from the wireless base station, each of the content data requested to be transmitted from the wireless terminal, to the wireless terminal,
A band setting method characterized by comprising: A band setting method in a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. ,
When the wireless terminal selects one or more content data from among a plurality of content data stored in the server, the server sends a content data transmission request for requesting transmission of the selected content data. Sending to
In order for the server to set a wired band corresponding to the wired band information related to the bandwidth setting of the wired network required for transmission of the content data requested to be transmitted to the wired network with the wireless terminal Performing necessary processing and transmitting a wired band setting response to the wireless terminal;
The server transmitting the wired band information to the wireless terminal;
When the wireless terminal receives the wired band information from the server, a wireless band necessary for setting a wireless band of the wireless access network with the wireless base station based on the wired band information Creating information,
The wireless terminal transmitting a wireless band setting request based on the wireless band information requesting setting of a wireless band in the wireless access network to the wireless base station;
When the radio base station receives the radio band setting request from the radio terminal, according to the received radio band setting request, between the radio base station and the radio terminal in the radio access network Setting a radio band requested to be set; and
Band setting completion notification for notifying completion of band setting in the wireless access network and the wired network when the wireless terminal receives the wired band setting response and detects that the wireless band setting has been completed. Sending to the server;
When the server receives the bandwidth setting completion notification from the wireless terminal, each of the content data requested to be transmitted from the wireless terminal is transmitted to the wireless terminal;
A band setting method characterized by comprising: A band setting method in a content providing system comprising: a wireless terminal; a wireless base station connected to the wireless terminal via a wireless access network; and a server connected to the wireless base station via a wired network. ,
When the wireless terminal selects one or more content data from among a plurality of content data stored in the server, the server sends a content data transmission request for requesting transmission of the selected content data. Sending to
When the server receives the content data transmission request from the wireless terminal, identifying a wireless base station to which the wireless terminal is connected;
The server transmitting, to the identified wireless base station, wired band information related to band setting of the wired network required for transmission of the content data requested to be transmitted;
The server performing a process necessary for setting a wired band corresponding to the wired band information for a wired network with the wireless terminal, and transmitting a wired band setting response to the wireless terminal; ,
When the wireless base station receives the wired band information from the server, a wireless band necessary for setting a wireless band of the wireless access network with the wireless terminal based on the wired band information Creating information,
The radio base station setting a radio band of the radio access network with the radio terminal based on the radio band information; and
Band setting completion notification for notifying completion of band setting in the wireless access network and the wired network when the wireless terminal receives the wired band setting response and detects that the wireless band setting has been completed. Sending to the server;
When the server receives the bandwidth setting completion notification from the wireless terminal, each of the content data requested to be transmitted from the wireless terminal is transmitted to the wireless terminal;
A band setting method characterized by comprising: In the band setting method according to any one of claims 1 to 4,
The content data is a multi-bit rate type content whose distribution rate can be changed within the range of the distribution rate width,
The wired band information includes information on a distribution rate width,
When the server receives the content data transmission request from the wireless terminal, the set bandwidth value of the wired bandwidth information transmitted to the wireless terminal or the wireless base station is set to a bandwidth value corresponding to the maximum distribution rate. And steps to
When the wireless base station or the wireless terminal detects that band setting has failed in the wireless access network or the wired network, it is possible to set a bandwidth value that can be set in the wireless access network or the wired network. Transmitting a bandwidth setting failure notification including a bandwidth value to the server;
When the server receives the band setting failure notification from the wireless base station or the wireless terminal, the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information. Determining whether or not,
When the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the set band value of the wired band information is set to the settable band value. Step to change to
When the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the distribution rate is set to the distribution rate corresponding to the settable band value. Steps to change,
The server, the wireless base station, and the wireless terminal perform bandwidth setting of the wired network and the wireless access network again based on the wired bandwidth information in which the set bandwidth value is changed to the configurable bandwidth value;
When the server receives the bandwidth setting completion notification, the server transmits each content data requested to be transmitted from the wireless terminal to the wireless terminal;
A band setting method characterized by comprising: In the band setting method according to any one of claims 1 to 4,
The content data is a multi-bit rate type content whose distribution rate can be changed within the range of the distribution rate width,
The wired band information includes information on the distribution rate width,
The radio base station transmitting a bandwidth status of a radio access network to the server;
The server monitoring the bandwidth status of the wired network;
When the server receives the content data transmission request from the wireless terminal, based on the bandwidth state of the wireless access network received from the wireless base station and the bandwidth state of the monitored wired network, the wireless access network and Calculating a settable bandwidth value, which is a bandwidth value that can be set for the wired network;
The server determining whether a distribution rate corresponding to the calculated settable bandwidth value is within a range of a distribution rate width included in the wired band information; and
When the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the set band value of the wired band information is set to the settable band value. Step to change to
When the server determines that the distribution rate corresponding to the settable band value is within the range of the distribution rate width included in the wired band information, the distribution rate is set to the distribution rate corresponding to the settable band value. Steps to change,
The server, the wireless base station, and the wireless terminal start bandwidth setting of a wired network and a wireless access network based on wired bandwidth information in which the set bandwidth value is changed to the configurable bandwidth value;
When the server receives the bandwidth setting completion notification, the server transmits each content data requested to be transmitted from the wireless terminal to the wireless terminal;
A band setting method characterized by comprising: The bandwidth setting method according to claim 6, wherein
The wireless base station, during transmission of content data from the server to the wireless terminal, transmitting the bandwidth status of the wireless access network to the server;
The server monitoring the bandwidth status of the wired network;
Is it possible for the server to increase the bandwidth set in the wired network and the wireless access network based on the bandwidth status of the wireless access network received from the wireless base station and the bandwidth status of the monitored wired network? Determining whether or not,
The server compares a delivery rate width with a current delivery rate and determines whether the delivery rate can be increased within the delivery rate range; and
When the server determines that the band set in the wired network and the wireless access network can be increased and the distribution rate can be increased within the distribution rate range, the set band value of the wired band information is set. Increasing steps,
The server changing a current delivery rate to a delivery rate corresponding to the increased set bandwidth value;
The server, the wireless base station, and the wireless terminal perform bandwidth setting of the wired network and the wireless access network again based on the wired bandwidth information including the increased setting bandwidth value;
A band setting method characterized by comprising:   The server has a distribution rate corresponding to the increased set bandwidth value after the bandwidth setting of the wired network and the wireless access network is again performed by the server, the wireless base station, and the wireless terminal. The bandwidth setting method according to claim 7, wherein the bandwidth setting method is changed to: The bandwidth setting method according to claim 6, wherein
The wireless communication base station, during transmission of content data from the server to the wireless terminal, transmitting a bandwidth status of a wireless access network to the server;
The server monitoring the bandwidth status of the wired network;
Whether it is difficult for the server to secure the bandwidth set in the wireless access network or the wired network based on the bandwidth status of the wireless access network received from the wireless base station and the bandwidth status of the monitored wired network Determining whether or not
The server compares a delivery rate width with a current delivery rate and determines whether the delivery rate can be lowered within the delivery rate width;
When the server determines that it is difficult to secure the bandwidth set in the wireless access network or the wired network and that the delivery rate can be lowered within the delivery rate width, the set bandwidth value of the wired bandwidth information is decreased. Step to
The server changing a current delivery rate to a delivery rate corresponding to the reduced set bandwidth value;
The server, the wireless base station, and the wireless terminal perform bandwidth setting of the wired network and the wireless access network again based on the wired bandwidth information including the reduced setting bandwidth value;
A band setting method characterized by comprising:   The server has a distribution rate corresponding to the reduced set bandwidth value before the bandwidth setting of the wired network and the wireless access network is again performed by the server, the wireless base station, and the wireless terminal. The bandwidth setting method according to claim 9, wherein the bandwidth setting method is changed to: In the band setting method according to any one of claims 1 to 10,
When the wireless terminal detects a stop of reception of content data from the server, the wireless base station indicates a wireless band between the wireless base station and the wireless terminal in the wireless access network. Transmitting to the radio base station a radio band change request for requesting the radio base station to change to a radio band before setting based on the radio band information from the radio band set based on
When the radio base station receives the radio band change request, the radio base station transmits a radio band between the radio base station and the radio terminal in the radio access network according to the received radio band change request. Changing from a radio band set by the base station based on the radio band information to a radio band before the radio base station sets based on the radio band information;
Each device in the wired network detects the stop of relay of content data transmitted from the server to the wireless terminal, and the content data Releasing the wired band reserved for relaying the content data if relaying is not resumed;
The bandwidth setting method is characterized by returning to the network state before the bandwidth setting. The band setting method according to any one of claims 1 to 10,
The wired band information includes a band securing time indicating a time for securing a band according to the wired band information in the wireless access network and the wired network,
The wireless band information includes the band reservation time included in the wired band information,
The wireless base station, when transmission of content data from the server to the wireless terminal is started, starting a timer for measuring the bandwidth reservation time;
A step of transmitting a content data transmission stop request to the server to stop transmission of content data when the wireless base station detects the end of the timer;
When the radio base station detects the end of the timer, the radio base station sets a radio band between the radio base station and the radio terminal in the radio access network based on the radio band information Changing from a radio band to a radio band before the radio base station sets based on the radio band information;
When the server receives the content transmission stop request from the wireless base station, stopping the transmission of content data to the wireless terminal;
Each device in the wired network detects the stop of relay of content data transmitted from the server to the wireless terminal, and the content data Releasing the wired band reserved for relaying the content data if relaying is not resumed;
The bandwidth setting method is characterized by returning to the network state before the bandwidth setting. The band setting method according to any one of claims 1 to 10,
The wired band information includes a band securing time indicating a time for securing a band according to the wired band information in the wireless access network and the wired network,
The wireless band information includes the band reservation time included in the wired band information,
Starting the timer for measuring the bandwidth reservation time when the wireless terminal starts receiving content data from the server;
When the wireless terminal detects the end of the timer, the wireless base station sets a wireless band between the wireless base station and the wireless terminal in the wireless access network based on the wireless band information Transmitting to the radio base station a radio band change request that requests the radio base station to change to a radio band before setting based on the radio band information from a band;
A step of transmitting a content data transmission stop request to the server to stop transmission of content data when the wireless terminal detects the end of the timer;
When the radio base station receives the radio band change request, the radio base station transmits a radio band between the radio base station and the radio terminal in the radio access network according to the received radio band change request. Changing from a radio band set by the base station based on the radio band information to a radio band before the radio base station sets based on the radio band information;
Stopping the transmission of content data to the wireless terminal when the server receives the content transmission stop request from the wireless terminal;
Each device in the wired network detects the stop of relay of content data transmitted from the server to the wireless terminal, and the content data Releasing the wired band reserved for relaying the content data if relaying is not resumed;
The bandwidth setting method is characterized by returning to the network state before the bandwidth setting.