KR20010098509A - Method for wireless multicasting service using base-station that substituted for replay station - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a wireless multicasting service method using a mobile communication base station as a relay station, and a computer readable recording medium storing a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention can freely make a broadcast channel within the range of simultaneous communication subscribers by utilizing a mobile communication base station as a relay station, and unlimitedly for a viewer who wants to watch the same channel with one traffic channel using a multicasting method, that is, a subscriber of a mobile communication network. To provide a wireless multicasting service method that can serve multimedia data and a computer-readable recording medium recording a program for realizing the method.

3. Summary of Solution to Invention

The present invention provides a wireless multicasting service method in a communication system, comprising: a first step of compressing multimedia data provided by a content provider (CP) from a content server to a base station through a multicasting channel (fixed frequency band); A second step of allocating a traffic channel for each of a plurality of multimedia data unidirectionally transmitted from each content server in a specific frequency band by a multicasting method in the base station; And a third step of broadcasting multimedia data through the assigned traffic channel (frequency band).

4. Important uses of the invention

The invention is used in multicasting services and the like.

Description

Method for wireless multicasting service using base-station that substituted for replay station}

The present invention relates to a wireless multicasting service method using a mobile communication base station as a relay station and a computer-readable recording medium recording a program for realizing the method. It transmits data unilaterally, and allocates radio resources (traffic channels) in a multicasting manner at the base station to broadcast multimedia data to a mobile data host (mobile terminal, PDA, HPC, etc.) of a mobile subscriber through a specific traffic channel. .

In general, a centralized server providing internet broadcasting in internet broadcasting transmits multimedia data to terminals of all users connected to the server. Many Internet users connect to an Internet broadcasting server (content server) operated by a provider that provides Internet broadcasting, and receive and listen to broadcast data provided by the server, for example, various multimedia data such as video and audio. In other words, up to now, all Internet users are connected to the central server regardless of the number of users.

However, as the development of multimedia technology is accelerated, the capacity of transmission data increases, which may cause frequent communication bottlenecks or server downtime.

In particular, in the case of Internet broadcasting, the dominance of image quality and sound quality dominates the competitiveness, and thus data capacity is inevitably increased. In this situation, in order to provide high quality Internet broadcasting service, the performance and capacity of the server must be increased. However, it is also practically impossible to continuously increase system performance and capacity indefinitely to meet the needs of numerous Internet broadcast users.

In addition, even in a large capacity server with good performance, when a large number of users are connected to the server, a user who wants to connect in the future may not be able to connect at all or may not be able to watch high-quality broadcasting due to a slow data transmission speed.

If the above phenomenon occurs continuously or at the same time, a user who attempts to access the maximum capacity attempts to connect, the server providing the Internet broadcast is down and cannot provide the Internet broadcast until the server is restored.

In general, data transmission on the Internet is carried out using Transmission Control Protocol / Internet Protocol (TCP / IP).

In order to perform Internet broadcasting using TCP / IP or User Datagram Protocol (UDP), the same data must be repeatedly transmitted to the multiple terminals by the number of terminals.

To solve this problem, IP multicasting is used.

IP multicasting is an Internet standard established to broadcast multimedia data such as video and audio over the Internet. It sets a specific Internet address area called "Class D", and terminals sharing the same address among the addresses of this area It is an internet protocol that one terminal sends data only once and can be delivered to all terminals.

However, IP multicasting can be used only in a local area network (LAN) to which a terminal is connected when the Internet router to which the terminal is connected does not support IP multicasting. In particular, in general, a server and a terminal on the Internet must pass through multiple Internet routers in order to access each other. If one of the routers does not support IP multicasting, the terminal can receive broadcast data from the server. none.

Moreover, since the routers supporting IP multicasting have not been widely distributed among the Internet routers up to now, it is impossible to actually broadcast the Internet using IP multicasting. Therefore, to date, very few places use IP multicasting to broadcast services on the Internet, and IP multicasting is only applied to intranet systems in an enterprise.

Currently, most Internet broadcast servers transmit and receive broadcast data by directly connecting the server and the terminal using TCP / IP or UDP instead of using IP multicasting. This broadcasting method is very difficult to increase the number of users that can be connected because the communication load of the server is very large. That is, when a large number of users access the Internet broadcasting server, various problems such as connection failure, loss of data and communication speed, and server down occur due to the overload of communication. Therefore, there was a problem that a lot of system construction cost is required.

On the other hand, the existing over-the-air broadcasting has a narrow frequency bandwidth in transmitting video signals through a relay station, and the channel is limited, and mobile communication uses a base station in an on-demand form using a wireless application protocol (WAP). Point-to-point protocol (PPP) is adopted between the mobile and the mobile terminal terminals to dedicate circuits individually allocated to mobile subscribers, increasing traffic on the system by inefficient use of traffic channels, and burdening subscribers' circuit fees. Is weighting.

In particular, in the case of a video on demand (VoD) service, one traffic channel is occupied when a specific terminal connects to a VoD server (see 4a in FIG. 4). There was a problem such as reaching the limit as in time.

Accordingly, in allocating radio resources between a content server such as a VoD server and the mobile host terminal, multimedia data is transmitted by designating a specific traffic channel in the allocated traffic channel region using a wireless multicasting technique (see 4b of FIG. 4). A method for more efficiently operating radio resources (traffic channels) is required by allowing each terminal (mobile host terminal) to receive multimedia data on a corresponding traffic channel through channel manipulation.

The present invention has been proposed to solve the above problems, by using a mobile communication base station as a relay station can make a broadcast channel freely within the range of the number of simultaneous communication subscribers, one traffic channel using a multicasting method The present invention provides a wireless multicasting service method capable of providing unlimited multimedia data to a viewer who wants to watch the same channel, that is, a mobile communication network subscriber, and a computer-readable recording medium recording a program for realizing the method. have.

1 is an exemplary configuration diagram of a mobile terminal to which the present invention is applied.

2 is an exemplary configuration diagram of a communication system for a wireless multicasting service to which the present invention is applied.

3 is a detailed configuration example of a communication system for a wireless multicasting service to which the present invention is applied.

4 is a diagram illustrating an embodiment of a wireless multicasting frequency domain allocation process used in the present invention.

5 is a flow diagram of an embodiment of a wireless multicasting service method in accordance with the present invention.

* Explanation of symbols for the main parts of the drawings

21: mobile host terminal 22: mobile communication base station

23: Internet matching device 24: Internet

25: host

In accordance with another aspect of the present invention, there is provided a wireless multicasting service method in a communication system, wherein a content server compresses multimedia data provided by a content provider (CP) to a base station through a multicasting channel (fixed frequency band). A first step of transmitting; A second step of allocating a traffic channel for each of a plurality of multimedia data unidirectionally transmitted from each content server in a specific frequency band by a multicasting method in the base station; And a third step of broadcasting multimedia data through the allocated traffic channel (frequency band).

In addition, the present invention is characterized in that it further comprises a fourth step in which the mobile host terminal receives in real time the multimedia data being broadcast through the corresponding traffic channel in the base station according to the user's request.

In order to achieve the above object, the present invention provides a multi-casting channel (fixed frequency band) by compressing multimedia data provided by a content provider (CP) in a content server in a communication system including a processor for a wireless multicasting service. A first function of transmitting to a base station via; A second function of allocating a traffic channel for each of a plurality of multimedia data unidirectionally transmitted from each content server in a specific frequency band by a multicasting method in the base station; And a computer-readable recording medium having recorded thereon a program for realizing a third function of broadcasting multimedia data through the assigned traffic channel (frequency band).

The present invention also provides a computer-readable recording medium having recorded thereon a program for realizing a fourth function of receiving, in real time, multimedia data broadcast by a base station through a corresponding traffic channel in response to a user's request. To provide.

The present invention unilaterally transmits multimedia data from a content server (web server, stream server, media server) to each mobile communication station (base station), and to a specific frequency band (traffic channel) allocated at each station. By transmitting the wireless multimedia data, a terminal (mobile host terminal) holder can finally watch the Internet broadcast by receiving the wireless multimedia data transmitted in a specific frequency band through the terminal operation. At this time, the relay function (relay program) assigned to each repeater allocates a traffic channel for each multimedia data that is unidirectionally transmitted from each content server to the buffering function and multimedia through the assigned traffic channel (frequency band). Perform the function of sending data.

The relay function (relay program) can freely create a broadcast channel within the range of the number of simultaneous communication subscribers, and unlimitedly multimedia to viewers (ie, mobile network subscribers) who want to watch the same channel with one traffic channel using a multicasting method. Can serve data

Therefore, one mobile host terminal does not occupy one traffic channel, but only one traffic channel per multimedia data for one broadcast between a content server (web server, stream server, media server, etc.) and a relay station (base station). The terminal can be connected to a specific frequency channel during multicasting broadcasting at the relay station, and can watch the broadcast after selecting a channel through a keypad or a specific key operation, thereby significantly reducing radio resources.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a mobile terminal to which the present invention is applied.

As shown in FIG. 1, a broadcast button capable of processing a broadcast function is added to a mobile terminal. The subscriber can search the multicasting frequency channel region allocated to each carrier by this broadcast button. Accordingly, when the subscriber selects a desired channel by pressing the broadcast button, the mobile terminal receives the multimedia data being broadcast through the corresponding frequency channel.

However, without further changing the broadcast button, a specific key of an existing terminal may be designated in advance to search for a multicasting frequency channel region allocated for each mobile communication provider.

As the terminal can be used through the channel setting when using the existing new terminal, the terminal for multicasting reception can access the specific frequency channel that is broadcasting to receive the multimedia data that is being broadcast through a specific channel. After selection, broadcast data may be received.

As shown in FIG. 4, a mobile communication provider allocates a plurality of multimedia data to each base station (4a) by assigning a multicasting channel (fixed frequency) in addition to the channel area allocated for each terminal (4a). Relay station). Then, each base station (transmitter) is provided with a relay function (relay program), through which a traffic channel allocated by assigning a traffic channel for each multimedia data unidirectionally transmitted from a specific frequency band from a buffering function and each content server Performs the function of multimedia data transmission through (frequency band).

Here, the relay function (relay program) can freely make a broadcast channel within the number of simultaneous communication subscribers, and unlimitedly to a viewer (ie, mobile network subscriber) who wants to watch the same channel with one traffic channel using a multicasting method. It can serve multimedia data.

The mobile terminal may be a wireless Internet browser, a personal digital assistant (PDA) capable of receiving and playing multimedia data, a mobile communication terminal such as a cellular phone or a PCS phone, IMT-2000 (International Mobile Telecommunication), It may be a next generation mobile communication terminal such as a universal mobile telecommunication service (UMTS), a hand held PC (HPC), or the like.

Now, the configuration of a communication system for a wireless multicasting service will be described in more detail with reference to FIGS. 2 and 3. In addition, the VoD service will be additionally described.

The communication system to which the present invention is applied includes a mobile data host 21, a mobile communication base station 22, an internet matching device 23, an internet 24, a host 25, a content provider (CP), and the like.

The mobile host terminal 21 is located on the user side and includes a personal computer (PC) 211, a mobile terminal (MS) 212, a PDA, an HPC, and the like.

The mobile communication base station 22 includes a base station (BTS) 221 and a mobile switching center (MSC) 222.

The base station 221 is provided with a relay function (relay program), through which a broadcast channel can be freely made within the number of simultaneous communication subscribers, and a viewer who wants to watch the same channel with one traffic channel using a multicasting method (that is, It is possible to provide unlimited multimedia data to mobile subscribers).

The host (web server, stream server, media server) 25 may be a content provider (such as a broadcast station (host address) 251, a cable television (CATV) 252, an internet station 253, other information providers 254, etc.). The multimedia data is received from the CP and unilaterally transmitted to the mobile communication base station 22 through an information communication network such as the Internet 24 or the like.

When the subscriber selects a desired channel by pressing a broadcast button or a specific key button, the mobile host terminal 21 receives multimedia data that is being broadcast through the corresponding frequency channel from the mobile communication base station 22. At this time, a wireless protocol is used between the mobile host terminal 21 and the mobile communication base station 22.

The mobile communication base station 22 broadcasts to the mobile host terminal 21. In addition, a traffic channel is set to multicast the multimedia data received from the host 25 through a specific traffic channel (fixed traffic channel).

The internet matching device 23 requests internet access to the mobile communication base station 22 to perform an internet service matching function between the internet 24 and the mobile communication network.

An encoder in the host 25 compresses multimedia data such as audio and video broadcast in real time and transmits the compressed data to a stream server. Then, the stream server transmits to the mobile host terminal 21 accessing the multimedia service through the mobile communication base station 22 in the case of the real time service, and stores the content in the content DB in the media server afterwards. It sends a request to or from the mobile host terminal 21 when requested.

The mobile host terminal 21 is composed of a WAP Browser and a multimedia service player. The WAP browser is used to access a web server in the host 25 through a wireless data network, and the terminal user desires multimedia content on the web server. Find and select the multimedia service player of the terminal to download or play the multimedia content at the same time while downloading.

5 is a flowchart illustrating a method of receiving a broadcast in a mobile host terminal according to an embodiment of the present invention.

First, a user presses a broadcast button or a specific key button of a mobile host terminal to receive a broadcast reception request.

The mobile host terminal then retrieves subscriber information (501) and checks whether it can receive multimedia broadcast data (502).

As a result of the check, if the reception is not possible, a message not received is notified 503.

As a result of the check, if the reception is possible, the controller notifies this of receiving the desired channel number from the user (504), and receives and provides multimedia data through the corresponding broadcast channel (505).

As described above, for the wireless multicasting service, first, the content server compresses multimedia data, such as audio and video, provided by the content provider (CP) and unilaterally transmits to the relay station (base station) through the multicasting channel (fixed frequency band). And assigns a traffic channel for each multimedia data that is unidirectionally transmitted from each content server to a buffering function in a relay function (relay algorithm) of a relay station (base station) to allocate an assigned traffic channel (frequency band). Through the multimedia data transmission function. At this time, the multimedia data can be provided to the viewers (ie, mobile communication network subscribers) who want to watch the same channel with one traffic channel without restriction.

Therefore, without one mobile host terminal occupying one traffic channel, only one traffic channel per multimedia data for one broadcast between the host (web server, stream server, media server, etc.) and the relay station (base station). The mobile host terminal can access a specific frequency channel during multicasting broadcasting at the relay station, and can watch the broadcast after selecting a channel through a keypad or a specific key operation so that the radio resource (traffic channel) between the host and the mobile host terminal can be viewed. Significant savings can be achieved.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention can secure a large number of broadcasting channels within the range of simultaneous communication subscribers, thereby enabling various types of broadcasting, and allowing many mobile communication network subscribers to watch the same channel in real time. At the same time, it can effectively reduce the burden of the multimedia service fee of the viewer.

That is, the present invention solves the limitation of the number of channels of the existing broadcast and at the same time, it is possible to significantly reduce the subscriber burden per communication line of the mobile communication network by the number of simultaneous viewers. In particular, the economic effect is more effective in the case of real-time information such as news, stock prices, quotes information, and short content such as music and music videos.

Claims (6)

In the wireless multicasting service method in a communication system, A first step of compressing, by a content server, multimedia data provided by a content provider (CP) to a base station through a multicasting channel (fixed frequency band); A second step of allocating a traffic channel for each of a plurality of multimedia data unidirectionally transmitted from each content server in a specific frequency band by a multicasting method in the base station; And A third step of broadcasting multimedia data through the allocated traffic channel (frequency band); Wireless multicasting service method using a mobile communication base station including a transmission station. The method of claim 1, A fourth step of receiving, by the mobile host terminal, the multimedia data being broadcasted through the corresponding traffic channel in real time according to a user's request; Wireless multicasting service method using a mobile communication base station further comprising a transmission station. The method according to claim 1 or 2, Between the content server and the base station, A wireless multicasting service method using a mobile communication base station as a relay station, wherein only one traffic channel is allocated for each broadcast multimedia data. The method of claim 3, wherein The base station, With the relay function, it is possible to freely create a broadcast channel within the range of the number of simultaneous communication subscribers, and multi-casting method to provide unlimited multimedia data to subscribers who want to watch the same channel with one traffic channel. Wireless multicasting service method using a mobile communication base station as a relay station. In a communication system having a processor for a wireless multicasting service, A first function of compressing multimedia data provided by a content provider (CP) in a content server and transmitting the compressed multimedia data to a base station through a multicasting channel (fixed frequency band); A second function of allocating a traffic channel for each of a plurality of multimedia data unidirectionally transmitted from each content server in a specific frequency band by a multicasting method in the base station; And A third function of broadcasting multimedia data through the assigned traffic channel (frequency band) A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 5, A fourth function of receiving, in real time, multimedia data broadcast by a base station through a corresponding traffic channel according to a user's request; A computer-readable recording medium that records a program for further realization.