JP2001156731A - Information providing method for radio data communication, information transmitter and information receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save a network resource while providing information changing as time lapses to clients with the leadbly a server in a radio data communication. SOLUTION: The server transmits packets to the client 200 in a push form with the leadbly the server. The packets include contents data denoting contents of information to be served from the server 100 to the client 200 and there is a plurality of kinds in media of the contents data. In this case, arrangement information designating a reproduction mode of the contents data generated in each of the media is transmitted with less frequency than that of the contents data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for providing information in wireless data communication, which is suitable for use in delivering stream data to a portable terminal having a micro browser.
The present invention relates to an information transmitting device and an information receiving device.

[0002]

2. Description of the Related Art In recent years, portable communication devices such as portable telephones and PHSs have been proposed as devices for receiving information from a server on the Internet. This type of mobile communication device is provided with a micro browser for downloading and reproducing content data indicating the content of the information to be provided from the Internet, and the user of the mobile communication device can use other devices such as a mobile computer, for example. Internet connection and browsing can be done without using. Specifically, the user of the mobile communication device uses, for example, a URL (Unif.
orm Resource Locator) and requests the server for desired information. In response, the server sends the content data corresponding to the requested information. According to such an interactive (pull) protocol, desired content is reproduced on the micro browser. It is expected that portable communication devices will become more widespread in the future from the convenience of receiving desired information even when going out.

[0003]

However, with the spread of such portable communication devices, the demand for receiving information has been diversified, and conventional browsing alone has
It has become difficult to meet user requirements. For example, a request to use a micro-browser like a television for watching live broadcasting such as horse racing or baseball, and a request to use for receiving breaking news, disaster information, traffic information, and the like can be considered. In such information, the content of information to be provided changes over time, and continuity of information is required. However,
In the pull-type protocol as described above, a request must be made for information that changes every moment, which is not only inconvenient for the user, but also causes a problem that communication overhead for making the request is large. In order to solve such a problem, even in the case of performing a so-called push type transmission in which data is unilaterally transmitted from a server, a large amount of data must be continuously transmitted, and the communication The problem that overhead is large arises.

In order to provide such information as described above, it is desirable to combine not only text information but also a plurality of types of media (media) such as video and audio. The data indicating the mode must be transmitted together with the content data on each medium. If such data is transmitted continuously, the amount of data becomes enormous as a whole, and there is a problem that network resources are wasted.

The present invention has been made to solve the above-mentioned problem, and can provide information that changes with time to a client under the initiative of a server, and can save network resources. An object is to provide an information providing method, an information transmitting device, and an information receiving device in wireless data communication.

[0006]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, data is transmitted in predetermined units from a server to a client, so that the data is transmitted over time. Information providing method in wireless data communication for providing information that changes according to the first unit, wherein the first unit includes unit information transmitted for each of the predetermined units, the arrangement data including arrangement information data indicating a reproduction mode of the data in the client. A unit data generating step of generating, in the server, a second type of unit data that includes content data indicating the content of the information and does not include the arrangement information data; and the generated first type of unit data. And transmitting the second type of unit data from the server to the client at a predetermined timing. Wherein the predetermined timing,
The arrangement information data is transmitted to the client at a frequency that is lower than the frequency at which the content data is transmitted to the client. The invention according to claim 2 is the information providing method in wireless data communication according to claim 1, wherein the predetermined timing is arbitrarily set in the server. According to a third aspect of the present invention, in the information providing method for wireless data communication according to the first aspect, the unit data generating step generates a plurality of types of the content data having different mediation formats representing the contents of the information. , The arrangement information data includes information on the mediation format.

According to a fourth aspect of the present invention, in the information providing method for wireless data communication according to the first aspect, the unit data is defined so as to include the arrangement information in a header portion. I do. According to a fifth aspect of the present invention, in the information providing method in the wireless data communication according to the first aspect, the unit data is defined so as to include the arrangement information in a data portion. According to a sixth aspect of the present invention, in the information providing method in wireless data communication according to the first aspect, the first type of unit data is data that does not include the content data. According to a seventh aspect of the present invention, in the information providing method for wireless data communication according to the first aspect, the first type of unit data is data including a plurality of the arrangement information.

According to an eighth aspect of the present invention, there is provided an information transmitting apparatus in wireless data communication for providing data that changes with time by transmitting data to a client in predetermined units. A unit data to be transmitted for each of the predetermined units, the first type of unit data including arrangement information data instructing a reproduction mode of the data in the client, or a content data indicating a content of the information. A unit data generating unit that generates a second type of unit data that does not include the arrangement information data; and a transmitting unit that transmits the generated unit data to the client at a predetermined timing. The frequency at which information data is sent to the client depends on the content data Characterized in that it is a little made timing than the frequency that is sent to and. According to a ninth aspect of the present invention, in the information transmitting apparatus for wireless data communication according to the eighth aspect, the predetermined timing is arbitrarily set in the information transmitting apparatus. According to a tenth aspect of the present invention, in the information transmission device for wireless data communication according to the eighth aspect, the unit data generating means generates a plurality of types of the content data having different mediation formats representing the contents of the information. , The arrangement information data includes information on the mediation format.

[0011] According to an eleventh aspect of the present invention, there is provided an information receiving apparatus in wireless data communication for receiving data that changes with time by receiving data from a server for each predetermined unit via a network. And a first type of unit data including arrangement information data for instructing a reproduction mode of the data in the client, or content data indicating contents of the information, the unit data being transmitted for each of the predetermined units. Receiving means for receiving a second type of unit data that does not include the arrangement information data, and reproduction means for reproducing the content data based on the arrangement information data included in the received unit data, The frequency at which the receiving means receives the arrangement information data is determined by transmitting the content data. Characterized in that less than degrees. According to a twelfth aspect of the present invention, in the information receiving apparatus for wireless data communication according to the eleventh aspect, the receiving means receives a plurality of types of the content data having different mediation formats representing the content of the information, The arrangement information data includes information on the mediation format, and the reproducing unit reproduces the plurality of types of content data in synchronization based on the information on the mediation format.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

[1. Configuration of Embodiment] [1-1. Overall Configuration] FIG. 1 is a diagram showing the overall configuration of the embodiment. The present embodiment is configured to transmit data from the server 100 to the client 200 via the network 300. In the present embodiment, the client 200 is a mobile phone,
Reference numeral 0 denotes a mobile communication network of a packet switching system. The client 200 and the network 300 are performed by wireless communication with the base station 310. As will be described in detail later, the client 200 includes a micro browser, and is configured to be able to reproduce content data continuously transmitted from the server 100. In the present embodiment, the content data is obtained by converting information that changes with time, such as video and audio, into data. Note that the media form (media) representing information in the present embodiment is not limited to data that is dynamic information such as audio and video that changes with time, and information to be provided. If the content changes over time, it also includes static information such as text and images representing the content. Regarding the encoding format of content data, for example, in the case of a moving image, MPEG (Moving P
icture Experts Group) or AD
PCM (Adaptive Differential Pulse Code Modulatio
Any known method such as n) may be used. Further, in the present embodiment, the network 300 is a packet network, and the unit data to be transmitted for each predetermined unit on the network 300 is a packet. The protocol and data format in the present embodiment will be described later in detail.

[1-2. Functional Configuration] Hereinafter, the functional configuration of the server 100 and the client 200 for realizing the above-described communication will be described.

[1-2-1. Functional configuration of server]
FIG. 2 is a diagram illustrating a functional configuration of a server 100. As shown in FIG. 2, the server 100 includes a transmission / reception unit 101 for transmitting / receiving data to / from the network 300, a control unit 102 for controlling data generation and transmission / reception, an arrangement information management unit 103, Information storage unit 104, media management unit 105, databases 106A and 106B,
106C (database 106 if not specified), database interface 107, camera 108-1, microphone 108-2, antenna 108-3, etc.
An input unit 108 for inputting data from outside, such as ...
An input interface 109 and a buffer 110 are provided.

The arrangement information management section 103 performs management for transmitting the arrangement information stored in the arrangement information storage section 104 to the client 200.
The media management unit 105 performs management for transmitting content data regarding various media to the client 200. In the present embodiment, content data previously stored in the database 106 of the server 100 and content data sequentially externally input from the input unit 108 are used. More detailed contents of the arrangement information and the content data used in the present embodiment will be described later in detail. The buffer 110 buffers content data to be transmitted to the client 200. The buffered data is packetized by the control unit 102 and then transmitted to the client 200.

[1-2-2. Functional Configuration of Client] FIG. 3 is a diagram showing a functional configuration of the client 200.
As shown in FIG. 3, a client 200 includes a transmitting / receiving unit 201 for transmitting / receiving data to / from a network 300, a buffer 202 for buffering received data, and a control unit 2 for controlling generation and transmission / reception of data.
03, an arrangement control unit 20 for controlling the reproduction mode of the content data based on the arrangement information in the received data
4. It has a media identification unit 205 for identifying the media of the content data, and a playback unit 206 for playing back the content data. The reproduction unit 206 has a function for outputting audio in addition to a function for displaying text and images on the micro browser described above.

[1-3. Data format] Next, FIG.
From the server 100 to the client 200
The data format to be transmitted to is described. FIG.
FIG. 3 is a diagram illustrating a data format of a packet according to the present embodiment. As shown in FIG. 3, the packet includes a header portion in which various information related to data to be transmitted is described, and a content itself of the data to be transmitted. Data section.

In the header portion, information indicating the type of data to be transmitted (denoted as Type in the figure) is described. In the present embodiment, there is a type of data to be transmitted that distinguishes between the media type of the content data and whether or not the content data includes arrangement information. In the present embodiment, the media type of the content includes text, a still image, a moving image, and audio, as described above.

The data section describes content data (denoted as content Body in the figure) or arrangement information. The contents of the content data reproduction mode indicated by the arrangement information include an identifier, a reproduction start time, an action time, a repeat request, a display method, and the like. Each content will be described below. The identifier is information for identifying a target to be arranged, and indicates content data to be reproduced with arrangement contents described below. More specifically, the identifier indicates the media type of the content data, and the arrangement information is transmitted from the server 100 to the client 200 by the number of media types to be reproduced simultaneously. The reproduction start time is information indicating a time at which reproduction of data to be arranged is started. A reproduction time is specified for each medium, and reproduction is performed based on the reproduction time, thereby enabling synchronization between the media. The action time is information indicating a reproduction time of a moving image or audio, a blinking or inversion time of a text, and the like. The repeat request is information indicating the number of times of reproduction and a time interval. The display method is data for specifying a window size, a display position, a color specification, a reduced / enlarged display, and the like. The contents of such arrangement information
By reproducing the content data based on this information, it becomes information indicating the relevance for reproducing a plurality of types of media in synchronization.

In the present embodiment, as shown by P1 in FIG. 4, a packet (hereinafter, referred to as a P1 packet) including the arrangement information and the content data in the data portion,
As shown in P2, a packet containing content data and not including arrangement information (hereinafter referred to as P2 packet) is used. Then, the frequency of transmitting the P1 packet including the arrangement information from the server 100 to the client 200 is set to be lower than the frequency of transmitting the P2 packet. That is, the frequency at which the arrangement information included in the P1 packet is transmitted to the client 200 is equal to P
The packet transmission timing is set so that the frequency of the content data included in one packet or P2 packet is transmitted to the client 200 less frequently. Content data such as the example of a P1 packet;
This is because, as described in the related art, if the packet including the data indicating the mode of reproducing the data is always transmitted, the amount of data required for communication increases as a whole, and network resources are wasted.

[1-4. Protocol Stack] Next, the protocol stack in the present embodiment will be described.
FIG. 5 is a diagram illustrating a protocol stack used in the present embodiment for performing the data communication as described above.
In the figure, the “lower layer” is a physical layer of the network 300.
A data link is shown, and “general-purpose protocol” is, for example, an Internet Protocol (Internet Protocol:
It shows a general-purpose device that can perform browsing in various networks, such as IP) and WAP (Wireless Application Protocol). "Media" in the figure
Indicates an application layer that handles the various media described above, and “arrangement information” indicates a protocol for transmitting the above-described arrangement information. In addition,
The “arrangement information” is configured to be included in both the media and the general-purpose protocol.

In this embodiment, according to the protocol shown in FIG. 5, content data of various media stored in the database 106 or content data externally input from the input unit 108 is generated in the server 100, and arrangement information is stored in the server 100. Client 2 added
Sent to 00. The client 200 detects arrangement information and performs arrangement control. Then, the content data is reproduced based on the arrangement information. In FIG. 5, two protocol stacks are shown in the server 100 and the client 200, respectively. However, this is an expression for facilitating understanding of the handling of the arrangement information. It does not indicate that signal transmission is performed through.

[2. Operation of Embodiment] Next, the operation of the present embodiment will be described.

[2-1. Outline operation] First, an outline operation of the present embodiment will be described. In the present embodiment, the above-described packet is transmitted to the client 200 in a push-type manner under the initiative of the server 100. The packet includes content data indicating the content of information to be provided from the server 100 to the client 100. As described above, there are a plurality of types of content data media. At this time, the P1 packet including the arrangement information designating the reproduction mode of the content data generated on each medium is transmitted less frequently than the P2 packet not including the arrangement information.

Next, the operation of the embodiment will be described with reference to the sequence shown in FIG. First, server 1
A connection is established between 00 and the client 200 (S1). When the connection is established, the server 100 sends a P1 packet (see FIG. 4) including the content data and the arrangement information to the client 100.
To start the information providing service (S2). P1
When the packet is transmitted, the P2 packet (see FIG. 4) that does not include the arrangement information is continuously transmitted in a push type (S2).
3-S6). At this time, the server 100 transmits the packet regardless of whether there is a request from the client 200. In the present embodiment, the client 200 may request the arrangement information, and in the sequence shown in FIG.
In step S7, the client 200
0 is requested for arrangement information. Upon receiving the request, the server 100 transmits a P1 packet including the content data to be transmitted next and the requested arrangement information to the client 200 (S8), and thereafter transmits a P2 packet not including the arrangement information (S9). . In steps S2 to S6, S8 and S9, the server 20
0 is transmitted to the database 106 in advance.
In some cases, data may be generated from data stored in the storage unit, or in some cases, data may be generated sequentially from data externally input from the input unit 108. Also, the timing of transmitting the arrangement information depends on when the service starts and when the client 20
It is not limited to the case where there is a request from 0. Various examples will be described later with specific examples.

[2-2. Operation of Server] Next, the operation of the server 100 will be described with reference to the flowchart shown in FIG. The process illustrated in FIG. 7 is executed in the server 100 at a predetermined cycle. First, it is determined whether it is time to deliver data to the client 200 (S101). The timing at which the data is to be distributed will be described later with reference to FIGS. 8 and 9 using specific examples. In some cases, the timing may be in accordance with a preset schedule, and in other cases, it may be determined by external factors. is there.

If it is determined in step S101 that it is not time to distribute the data, the process proceeds to step S101.
101; No), the process shown in FIG. 7 ends. On the other hand, if it is determined that it is time to distribute data (S
101; Yes), the content data to be distributed is buffered in the buffer 110 (S102), and it is determined whether or not the arrangement information is transmitted together with the content data (S103). The transmission timing of the transmission of the arrangement information will also be described later using a specific example with reference to FIGS.

If it is determined in step S103 that the timing for transmitting the arrangement information has come, (S103)
103; Yes), a P1 packet including the content data and the arrangement information is generated (S104), and if it is determined that the timing for transmitting the arrangement information is not reached (S103; No), a P2 packet including the content data is generated (S103; No). S105). Then, step S10
4 or the packet generated in step S105 is transmitted to the client 200 (S106), and the processing shown in FIG. 7 ends.

[2-3. Specific Example] Next, a specific example of the present embodiment will be described with reference to FIGS.
FIG. 8 is a program table of the information providing service in this specific example, and FIG. 9 is a time chart in this specific example. In this specific example, the time zone for transmitting the content to be transmitted from the server 100 is set in advance as the program. In the example of the program shown in FIG. 8, the contents constituting the program A are transmitted during the time period from time t100 to time t200, and the contents constituting the program B are transmitted during the time period from time t200 to time t300.
Subsequent time zones are set to transmit the contents constituting the program C. As the contents of the program, for example,
In addition to information programs and educational programs such as town guides and navigation using data stored in the database 106, relay information such as traffic information and sports and horse racing using data input live from the input unit 108, storage and live input Information programs using both data, such as disaster / breaking news, auction / stock price information, etc., can be considered. Alternatively, a commercial such as a notice of a movie may be scheduled during a program.

In one program, the content of the arrangement differs depending on the time zone. In the specific example shown in FIG.
In the time period of 110, the content to be reproduced is transmitted with the arrangement information A1, and in the time period from time t110 to time t120, the content to be reproduced is transmitted with the arrangement information A2.
In the time period from time t120 to time t200, a program is set so as to transmit the content to be reproduced by the arrangement information A3.

Next, the timing of transmitting the arrangement information will be described below. At the start of service This is a case where arrangement information is transmitted when a connection between the server 100 and the client 200 is established, or when a service start request is transmitted from the client 200 to the server 100. In FIG. 9, the connection is established at time t101, and a service start request is transmitted from the client 200 to the server 100. The server 100 starts the service at time t1.
The arrangement information A1 of the time zone to which 01 belongs is transmitted to the client 200. Note that the packet transmitted here is a P1 packet including the content data to be transmitted at time t101 and the arrangement information A1.

According to the scheduling of the program In this specific example, since the program is set as shown in FIG. 8, the arrangement information is transmitted according to the scheduling. The scheduling includes scheduling for media to be transmitted and scheduling for arrangement. For example, if the media to be transmitted is a text in a certain time zone and a moving image in the next time zone, the arrangement information for the moving image is transmitted before switching for transmitting the moving image. Even if the media is not changed, the arrangement may be changed. For example, when changing the font for displaying text or changing the display position, the arrangement information is transmitted immediately before the arrangement is changed. In FIG. 9, the reproduction by the arrangement information A1 is scheduled in the time period up to the time t110,
In the time period after the time t110, reproduction by the arrangement information A2 is scheduled. The server 100 transmits the arrangement information A2 to the client 200 at the switching time t110, and the client 200 starts the display A2 based on the arrangement information.

Transmission at predetermined time intervals In this specific example, arrangement information is transmitted at predetermined time intervals even in the time zone to which the same arrangement is applied. This is a transmission performed in case the client 200 cannot normally receive the P1 packet including the arrangement information. This is because, in the present embodiment, since the client 200 is a portable communication device, data loss or error easily occurs in a wireless section. When the client receives the arrangement information to be changed, the client changes the playback mode of the content. If the arrangement information transmitted at the change timing described above cannot be normally received, the client 200 sends a message to the server 100 side. The content cannot be reproduced according to the set scheduling.

Therefore, in this specific example, even after the arrangement information is transmitted at the change timing, the same arrangement information is transmitted at predetermined time intervals. As a result, even if the client 200 once fails to receive the arrangement information, the client 200 can receive the arrangement information retransmitted thereafter. In such a case, the timing at which the arrangement is changed on the client 200 side is later than the scheduling set on the server 100 side. In this embodiment, since the client 200 is a portable communication device and the content is reproduced by a micro browser, the server 100 sets the content data and the arrangement information such that some loss or error of data is allowed. are doing.

In the example shown in FIG. 9, the arrangement information transmitted from server 100 at time t120 is not transmitted to client 200 normally. However, the client 200 has received the arrangement information A3 transmitted at a time t121 after a predetermined time s. Therefore, according to the scheduling on the server 100 side, the display A3 from the time t120 is changed to the client 2
It can be seen that the arrangement mode at 00 is display A3 from time t121.

In this specific example, in addition to the transmission of the content by the program shown in FIG. 8, the content transmission by the external input is also performed in this specific example. This is a case where an image, sound, or the like input from the input unit 108 (see FIG. 2) is transmitted. The transmission trigger of the input data can be set arbitrarily. For example, when the camera 108-1 is a surveillance camera, transmission is performed as content when a predetermined video such as a visitor or an intruder is received. You may make it start. Alternatively, transmission of the content may be started when real-time information such as breaking news is received from the antenna 108-3. When such an external input occurs, the server 100 generates content data, generates arrangement information for reproducing the content, and transmits the content data and the arrangement information to the client 200. In the example illustrated in FIG. 9, live input of content occurs from the input unit 108 at time t122. The server 100
The arrangement information A3 'is generated and transmitted to the client 200. When the arrangement information A3 is received, the client 200 changes the arrangement to the display A3'.

When a request for arrangement information arrives from the client The above-described timing is for the server 100 to transmit the arrangement information on its own, but when the client 200 determines that the arrangement information is necessary, the server 100
Can make an arrangement information request. For example, an arrangement information request may be made when an error is detected in the received arrangement information, or the client 200 monitors the elapse of a predetermined period, and determines whether a predetermined period has elapsed since the previous arrangement information was transmitted. If new arrangement information is not transmitted even though the period has elapsed, an arrangement information request may be made. In the example shown in FIG. 9, at time t103, the client 200
Makes an arrangement information request, and the server 100 transmits the arrangement information to the client 200 in response to the request.

In addition, when the server 100 changes the contents and arrangement of the media In addition to the above-described timing, it may be necessary to change the medium of the contents transmitted from the server 100 or to change the contents of the arrangement. The arrangement information is newly transmitted when the message is received. For example, there is a case where there is a defect in the content data for the program being transmitted and the user looks back to another program. Alternatively, for example, in a case where the server 100 provides a service using the location information of the client 200 (such as displaying the location of the client 200 on a map), the server 100
, The content or arrangement may be changed when the area where the client 200 is located is changed.

[3. Effect of Embodiment] As described above, in the present embodiment, the arrangement information is transmitted as needed, and is not always transmitted together with the content data, so that the overall data transmission amount can be reduced, Network resources can be saved. Further, even if the network environment is not good and the arrangement information may be lost, the arrangement information can be transmitted every predetermined period or the client can make an arrangement request. It can be performed.

[4. Modifications] The present invention is not limited to the above-described embodiment, and various modifications as described below are possible.

In the above embodiment, when the arrangement information is transmitted, the arrangement is made so that the data part of the packet includes the arrangement information and the content data. However, as shown in FIG. A packet transmitting only the arrangement information without including the content data may be used. In the example shown in FIG. 10, a plurality of (n) pieces of arrangement information are included in one packet. In such a case, an identifier such as an ID of the content data to be arranged or a media type may be added to each arrangement information. As a result, a plurality of transmissions can be transmitted in advance, and the amount of data in communication can be further reduced.

Alternatively, when a plurality of media are reproduced simultaneously by the client 200, arrangement information may be generated for each medium and transmitted simultaneously as shown in FIG. In this way, since the media transmitted from the server 100 after the client 200 receives the arrangement information can be reproduced in a synchronized manner, a plurality of types of media can be synchronously arranged as one application. In the above embodiment, the arrangement information is included in the data part of the packet. However, as shown in FIG. 11, the arrangement information may be included in the header part. In this case, as in the above embodiment, the content data and the arrangement information may be transmitted simultaneously, or the data portion may be transmitted without including the content data. Regardless of which type of packet is used, it is only necessary that the server 100 can transmit the arrangement information to the client 200 at a timing such that the frequency at which the arrangement information is transmitted is lower than the frequency at which the content data is transmitted.

In the above embodiment, the reproduction mode is described as an example of the contents of the arrangement information. However, the present invention is not limited to this, and other information necessary for reproducing the contents may be included. For example, information for managing the reproduction order of the content data is included, and when the client 200 receives the content data, if the order transmitted as the arrangement information and the order of the received packets are different,
Playback may be performed in the order specified in the arrangement information.

In the above embodiment, the network 300 is a packet-switched mobile communication network, and the packet is described as data in a predetermined unit. However, the present invention is not limited to this. It may be a frame. Also, client 2
00 does not need to be a portable communication device.
00 may be connected by wire.

In the above embodiment, the client and the server are one-to-one, but may be one-to-many. In such a case, the packet may be broadcast to a plurality of clients according to the scheduling set on the server 100 side. Note that address information (for example, IP
The address may be fixedly assigned to each client in advance, or may be dynamically assigned to the client at the start of communication. The server 100 may store address information for each client in advance, or may notify the server 100 from the client 200 when establishing the connection described in the above embodiment.

[0045]

As described above, according to the present invention,
In mobile communication, information that changes over time can be provided to clients led by a server, and network resources can be saved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an embodiment.

FIG. 2 is a block diagram illustrating a functional configuration of a server.

FIG. 3 is a block diagram illustrating a functional configuration of a client.

FIG. 4 is a diagram showing a data format in the embodiment.

FIG. 5 is a diagram illustrating a protocol stack in the embodiment.

FIG. 6 is a sequence diagram illustrating an operation of the exemplary embodiment.

FIG. 7 is a flowchart illustrating the operation of the server.

FIG. 8 is a diagram illustrating a specific example of the embodiment.

FIG. 9 is a diagram illustrating a specific example of the embodiment.

FIG. 10 is a diagram showing a modification of the data format (part 1).

FIG. 11 is a diagram showing a modification of the data format (part 2).

[Explanation of symbols]

 100 server 101 transmission / reception unit 102 control unit 103 arrangement information management unit 104 arrangement information storage unit 105 media management unit 106 A, B, C database 103 …… Database interface 108… Input unit 108-1… Camera 108-2… Microphone 108-3… Antenna 109… Input interface 110… Buffer 200… Client 201… .., A transmission / reception unit, 202, a buffer, 203, a control unit, 204, an arrangement control unit, 205, a media identification unit, 206, a reproduction unit 300, a network, 310, a base station.

Continuing on the front page (72) Inventor Hidetoshi Ueno 2-1-1 Toranomon, Minato-ku, Tokyo Inside NTT Mobile Communication Network Corporation (72) Inventor Norihiro Ishikawa 2-1-1 Toranomon, Minato-ku, Tokyo No. F-term in NTT Mobile Communication Network Co., Ltd. (reference) 5B089 GA11 GA25 GB04 HA13 JA33 JB22 KA07 5K067 AA34 BB04 DD27 EE02 EE10 FF31 HH22 5K101 KK18 LL12 MM07 NN06 NN37 RR13 UU19

Claims (12)

[Claims] 1. An information providing method in wireless data communication for providing information that changes over time by transmitting data from a server to a client in predetermined units, wherein the predetermined unit is The first type of unit data including arrangement information data indicating a reproduction mode of the data in the client, or the arrangement data including the content data indicating the content of the information. Generating a second type of unit data in the server, and transmitting the generated first type of unit data and the second type of unit data from the server to the client at a predetermined timing. And wherein the predetermined timing is when the arrangement information data is transmitted to the client. An information providing method in wireless data communication, wherein the frequency at which the content data is transmitted to the client is lower than the frequency at which the content data is transmitted to the client. 2. The information providing method in wireless data communication according to claim 1, wherein the predetermined timing is arbitrarily set in the server. 3. The method of providing information in wireless data communication according to claim 1, wherein the unit data generating step generates a plurality of types of the content data having different mediation formats representing the contents of the information, An information providing method in wireless data communication, wherein the data includes information on the mediation format. 4. The information providing method in wireless data communication according to claim 1, wherein the unit data is defined so as to include the arrangement information in a header portion. Method. 5. The information providing method in wireless data communication according to claim 1, wherein the unit data is defined to include the arrangement information in a data part. Method. 6. The information providing method in wireless data communication according to claim 1, wherein the first type of unit data is data that does not include the content data. . 7. The information providing method in wireless data communication according to claim 1, wherein the first type of unit data is data including a plurality of the arrangement information. Method. 8. An information transmission apparatus in wireless data communication for providing information that changes with time by transmitting data to a client in predetermined units, wherein the information transmission apparatus includes: Unit data to be transmitted, the first type of unit data including arrangement information data instructing a reproduction mode of the data in the client, or a second unit data including content data indicating the content of the information and not including the arrangement information data Unit data generating means for generating two types of unit data; and transmitting means for transmitting the generated unit data to the client at a predetermined timing, wherein the predetermined timing is such that the arrangement information data is transmitted to the client. The frequency at which the content data is transmitted to the client. An information transmitting apparatus in wireless data communication, wherein the timing is less. 9. The information transmitting apparatus in wireless data communication according to claim 8, wherein the predetermined timing is set arbitrarily in the information transmitting apparatus. 10. The information transmitting apparatus according to claim 8, wherein the unit data generating means generates a plurality of types of the content data having different mediation formats representing the contents of the information, and the arrangement information. An information transmitting apparatus in wireless data communication, wherein the data includes information on the mediation format. 11. An information receiving apparatus in wireless data communication for receiving information that changes over time by receiving data from a server for each predetermined unit via a network, the information receiving apparatus comprising: Unit data to be transmitted for each unit, the first type of unit data including arrangement information data indicating a reproduction mode of the data in the client, or the arrangement information data including content data indicating the content of the information. Receiving means for receiving a second type of unit data not included, and reproducing means for reproducing the content data based on the arrangement information data included in the received unit data, wherein the receiving means comprises the arrangement information The frequency of receiving data is less than the frequency of transmitting the content data. An information receiving device in wireless data communication, which is characterized by the following. 12. The information receiving apparatus for wireless data communication according to claim 11, wherein the receiving means receives a plurality of types of content data having different mediation formats representing the contents of the information, and the arrangement information data is An information receiving apparatus in wireless data communication, comprising: information on the mediation format; and the reproducing unit synchronizes and reproduces the plurality of types of content data based on the information on the mediation format.