KR100603902B1 - The supporting method of wireless network system for the one direction multimedia broadcasting service - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a broadcast service supporting method of a wireless network system for unidirectional multimedia broadcasting service and a computer readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention, the same pseudo noise code (PN Code), by using the base station system for use by the subscriber station recognizes the base station to one base station moving between base station hand-off, and a new location registration in only the frequency domain for multimedia broadcast service And a method for supporting a broadcast service of a wireless network system for a unidirectional multimedia broadcasting service which generates a diversity effect by demodulating a signal of all neighboring base stations providing a broadcast service. To provide a computer-readable recording medium for recording the program.

3. Summary of Solution to Invention

The present invention provides a method for supporting a multimedia broadcasting service of a wireless network system, the method comprising: a broadcast service request step of receiving a broadcast service request signal from a subscriber station by a base station system currently performing communication with a subscriber station; A broadcast service allocation step of transmitting, by the base station system, a broadcast service request signal of the subscriber station to a multimedia broadcasting service server, receiving the validity of the subscriber station from the broadcast service server and allocating the corresponding broadcast service; Transmitting, by the base station system to which the broadcast service is assigned, a broadcast service dedicated base station switching message for transmitting a redirection message to the subscriber station; And a base station system of the base station system to which the broadcast service is assigned and a plurality of base station systems to which the broadcast service is assigned through the redirection message from the subscriber station to synchronize with the subscriber station to provide the broadcast service. Includes broadcast service phase.

4. Important uses of the invention

The present invention is used for one-way multimedia broadcasting service.

One-way, multimedia broadcasting, pseudonoise code, handoff, diversity,

Description

The support method of wireless network system for the one direction multimedia broadcasting service}             

1 is a diagram illustrating an embodiment of a wireless network system for supporting a unidirectional multimedia broadcasting service to which the present invention is applied.

2 is a detailed configuration diagram of an embodiment of a wireless network system for supporting one-way multimedia broadcasting service to which the present invention is applied.

3 is a flowchart illustrating a broadcast service supporting method of a wireless network system for supporting a unidirectional multimedia broadcasting service according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: subscriber station 20: base station system

30: multimedia broadcasting system 40: multimedia broadcasting service server

       50: wireless information communication network 60: mobile switching center (MSC)

       70: base station control station (BSC) 80: base station (BTS)

The present invention relates to a broadcast service support technology of a wireless network system for unidirectional multimedia broadcasting service, and more particularly, by using a base station system using the same PN code in a dedicated frequency domain for a multimedia broadcasting service. The subscriber station recognizes the base stations as one base station so that handoffs and new location registrations do not occur when the base stations move between them, and a diversity effect is generated by the terminal demodulating the signals of all the neighbor base stations providing the broadcast service. The present invention relates to a broadcasting service supporting method of a wireless network system for unidirectional multimedia broadcasting service, and a computer readable recording medium storing a program for realizing the method.

At present, with the development of a wireless network for mobile communication, the speed of information that can be transmitted over the air is increasing, and many contents using the same have been proposed. Therefore, mobile communication providers are also proposing different broadcasting service ideas that are differentiated in order to implement a service suitable for the development of a wireless network, and also develop products corresponding thereto.

However, many proposals for a multimedia broadcasting service have been released. However, there are still many concerns about the problem of hand-off between base stations. In other words, the multimedia broadcasting service is not for a specific individual but for all subscribers in a wide area that wants the service. Therefore, when the subscriber moves, the subscriber's new location registration and handoff is performed in the whole multimedia broadcasting system. There was a problem with control.

The present invention has been proposed to solve the problems of the prior art as described above, and by using a base station system using the same pseudo noise code (PN Code) in a dedicated frequency region for a multimedia broadcasting service, a subscriber station is connected to a corresponding base station. One-way multimedia broadcasting service to recognize diversity as one base station to prevent handoff and new location registration when moving between base stations and to generate diversity effect by demodulating the signals of all neighboring base stations providing broadcasting service. An object of the present invention is to provide a broadcast service supporting method of a wireless network system for a computer and a computer readable recording medium recording a program for realizing the method.

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According to an aspect of the present invention, there is provided a method for supporting a multimedia broadcasting service of a wireless network system, the method comprising: a broadcast service request step of receiving a broadcast service request signal from a subscriber station by a base station system currently performing communication with a subscriber station; A broadcast service allocation step of transmitting, by the base station system, a broadcast service request signal of the subscriber station to a multimedia broadcasting service server, receiving the validity of the subscriber station from the broadcast service server and allocating the corresponding broadcast service; Transmitting, by the base station system to which the broadcast service is assigned, a broadcast service dedicated base station switching message for transmitting a redirection message to the subscriber station; And a base station system of the base station system to which the broadcast service is assigned and a plurality of base station systems to which the broadcast service is assigned through the redirection message from the subscriber station to synchronize with the subscriber station to provide the broadcast service. Characterized in that it comprises a broadcast service step.

On the other hand, the present invention provides a wireless network system having a processor for a one-way multimedia broadcasting service, a broadcast service request function for receiving a broadcast service request signal from the subscriber station by the base station system currently communicating with the subscriber station; A broadcast service allocation function for transmitting the broadcast service request signal of the subscriber station received by the base station system to a multimedia broadcasting service server, receiving the validity of the subscriber station from the broadcast service server, and allocating the corresponding broadcast service; A broadcast service dedicated base station switching message transmission function of transmitting a redirection message to the subscriber station by the base station system to which the broadcast service is assigned; And a base station system of the base station system to which the broadcast service is assigned and a plurality of base station systems to which the broadcast service is assigned through the redirection message from the subscriber station to synchronize with the subscriber station to provide the broadcast service. A computer readable recording medium having recorded thereon a program for realizing a broadcast service function is provided.

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 a diagram illustrating an embodiment of a wireless network system for supporting a unidirectional multimedia broadcasting service to which the present invention is applied.

As shown in FIG. 1, a wireless network system for unidirectional multimedia broadcasting service to which the present invention is applied operates based on a wireless information communication network 50, and includes a subscriber station 10, a base station system 20, and multimedia broadcasting. A system 30 and a multimedia broadcast service server 40.

The unidirectional multimedia broadcasting service does not start a service by requesting a program desired by a subscriber like a service performed by a conventional television broadcasting service system or a cable television broadcasting service system. To switch to the service.

In order to implement such a multimedia broadcasting service, first, a broadcast service dedicated FA (Frequency Assignment) is implemented, and a task of classifying a broadcast service dedicated program channel is required. Here, the broadcast service dedicated FA refers to a broadcast service dedicated frequency band. In addition, the forward service of the 95A or CDMA2000 system can be divided into program channels by Walsh codes. If a specific FA of a base station services only a dedicated multimedia broadcasting service, it can be serviced by several programs in capacity. An example of separating program channels by Walsh code is as follows.

Example: Broadcasting a Movie: Walsh Code 10

  Unpublished propaganda broadcasts: Walsh code 16

      TV KBS Broadcast: Walsh Code 18

In this case, since an individual dedicated channel supporting the corresponding program broadcasting service must support the overall service for the corresponding base station or a specific FA, forward power control for a specific subscriber is not possible, and maximum forward power control (Maximum Forward) Power Control must support power.

In addition, the specific FA of the multimedia broadcasting base stations in the present invention is characterized by using the same PN code (hereinafter referred to as "PN code").

When the same PN code is used as described above, the terminal recognizes the base stations as one base station, and thus, the handoff does not occur, and location registration does not occur even when the base stations move between the base stations. In addition, it is possible to additionally enjoy the diversity effect by recognizing all signals transmitted from neighbor base stations.

As described above, a method of implementing a broadcasting system for ensuring that a specific FA of a base station providing a multimedia broadcasting service has the same PN code includes a method of installing dedicated macro base stations or using existing base stations. Here, the method of installing and providing a macro base station dedicated to a broadcast service has many conveniences, but there is a difficulty in coverage, and when the existing base stations are used, various supplementary work are required. That is, the general subscribers should not be allowed to enter the dedicated broadcasting service FA, and the preliminary work must be performed to use the same PN code. The present invention has chosen one of the possible methods using existing base stations.

2 is a detailed block diagram of an embodiment of a wireless network system for supporting a one-way multimedia broadcasting service to which the present invention is applied.

As shown in FIG. 2, the subscriber station 10 transmits a first broadcast service request signal to an initial base station system 20, and eventually receives a channel from the base station system 20 and receives a multimedia broadcasting system 30. ), The multimedia broadcasting service is started.

The base station system 20 which receives the first broadcast service request signal from the subscriber station 10 and transmits the second broadcast service request signal to the multimedia broadcasting service server 40 after confirming the identity of the subscriber, is a base station (BTS: Base). Transmission Station (80), Base Station Controller (BSC: Base Station Controller) 70, Mobile Switching Center (MSC: Mobile Switching Center) (60), and the broadcasting service allocation from the multimedia broadcasting service server 40 The broadcast channel is allocated to the subscriber station 10 by transmitting a redirection message to the subscriber station 10. Here, the redirection message includes a multimedia broadcasting service dedicated frequency channel, Walsh code, and PN code information.

In particular, the base station system 20 uses the same pseudo noise code (PN Code) in a dedicated frequency domain for a multimedia broadcasting service according to the present invention so that the subscriber station 10 recognizes the base stations as one base station. When (10) moves between base stations, handoff and new location registration do not occur, and a diversity effect is generated by the terminal demodulating the signals of all neighboring base stations providing the broadcast service. It is an important feature of the invention. That is, the subscriber station 10 recognizes each pseudo noise code having a time difference from a plurality of base stations providing the broadcast service as signals independent from each other. For example, when the pseudonoise code is received through path 1, path 2, and path 3 at different times, the subscriber station 10 despreads in synchronization with the pseudo noise code received through path 1. In this case, the pseudonoise codes received through the path 2 and the path 2 are not synchronized and thus despreading is not performed. Similarly, if the subscriber station 10 synchronizes with the pseudonoise code received through path 2, the pseudonoise codes received through path 1 and path 3 are not despread. In addition, in the case of the spread signal of the CDMA communication network to which the present invention is applied, the bandwidth is 1.25 MHz, but fading of the signal does not decrease as a whole, but only part of the spreading signal is faded.

The multimedia broadcasting service server 40 receives the second broadcast service request signal from the base station system 20 and examines whether the subscriber identified in the base station system 20 is a valid subscriber for the corresponding service. The broadcast service corresponding to the second broadcast service request signal is allocated from the broadcast service provided by the program to the base station system 20.

The multimedia broadcasting system 30 provides a broadcasting service according to the second broadcasting service request signal to the base station system 20 through the multimedia broadcasting service server 40, and then between the subscriber station 10 and the base station system 20. When channel allocation is completed, the multimedia broadcasting service is started in synchronization with the subscriber station 10.

 3 is a flowchart illustrating a broadcast service supporting method of a wireless network system for supporting a unidirectional multimedia broadcasting service according to the present invention.

Referring to the flowchart shown in Figure 3 in more detail as follows.

First, the subscriber station 10 transmits a first broadcast service request signal according to a desired broadcast channel to the base station system 20 (100). The first broadcast service request signal includes identity information of a subscriber and broadcast channel information desired by the subscriber.

Subsequently, the base station system 20 which has received the first broadcast service request signal checks the identity information of the subscriber included in the first broadcast service request signal (110). In step 120, the subscriber station 10 transmits the second broadcast service request signal to the multimedia broadcasting service server when the determination is made. The second broadcast service request signal includes previously identified identity information of the subscriber and broadcast channel information desired by the subscriber.

Subsequently, after receiving the second broadcast service request signal, the multimedia broadcasting service server 40 uses the broadcast channel information included in the second broadcast service request signal to check whether the subscriber is a valid subscriber for the corresponding service (140). ), If the determination is made ineligible for the service, the service ineligibility determination signal is transmitted to the subscriber station 10 (150), and if the determination is made for the service, the broadcasting service received from the multimedia broadcasting system 30 Is assigned to the base station system (160).

Subsequently, the base station system 20 assigned the broadcast service from the broadcast service server 40 transmits a redirection message to the subscriber station 10 (170). The redirection message includes a dedicated broadcasting channel, Walsh code, and PN code information for the multimedia broadcasting service.

Finally, the subscriber station 10 allocated the broadcast frequency channel through the redirection message starts the broadcast service corresponding to the first broadcast service request signal by tuning with the multimedia broadcasting system 30 (180). That is, in operation 180, a broadcast service of a program corresponding to the Walsh code is received. Subsequently, when the broadcasting service is terminated while watching the broadcasting service, the subscriber station 10 according to the conventional method is one of the base station system 10 of a plurality of base station systems located in a neighboring area that provides a voice or data service. ), And receive voice or data service.

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

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

As described above, the present invention uses a base station system using the same pseudo noise code (PN Code) in a specific multimedia broadcasting frequency region under a multimedia broadcasting service, so that the subscriber station recognizes the base stations as one base station and moves between base stations. Handoff and new location registration do not occur, and there is an advantage of generating a diversity effect by the terminal demodulating the signals of all neighboring base stations providing the broadcast service.

Claims (7)

In the multimedia broadcasting service support method of a wireless network system, A broadcast service request step of receiving a broadcast service request signal from the subscriber station by a base station system currently performing communication with the subscriber station; A broadcast service allocation step of transmitting, by the base station system, a broadcast service request signal of the subscriber station to a multimedia broadcasting service server, receiving the validity of the subscriber station from the broadcast service server and allocating the corresponding broadcast service; Transmitting, by the base station system to which the broadcast service is assigned, a broadcast service dedicated base station switching message for transmitting a redirection message to the subscriber station; And The base station system to which the broadcast service is assigned and the base station system to which the broadcast service is assigned are synchronized with the subscriber station through the redirection message from the subscriber station. Service steps Broadcast service support method of a wireless network system for a one-way multimedia broadcasting service comprising a. The method of claim 1, As the broadcast service is terminated in the subscriber station, any one of a plurality of base station systems for providing a voice or data service is synchronized with the subscriber station, thereby terminating the broadcast service for providing a voice or data service. Broadcast service support method of a wireless network system for a one-way multimedia broadcasting service further comprising. The method according to claim 1 or 2, The redirect message is Broadcast service dedicated frequency channel, Walsh (Walsh) code, Pseudo-noise code (PN Code), characterized in that the broadcast service support method for a wireless network system for a wireless network system. delete The method of claim 3, wherein The multimedia service step, The subscriber station checks the broadcast program through the received Walsh code, checks the frequency channel of the broadcast program through the received broadcast dedicated frequency channel, and any of the base station systems assigned a plurality of broadcast services through the pseudo noise code. A method of supporting a broadcast service of a wireless network system for unidirectional multimedia broadcasting service, characterized in that a frequency channel of a specific broadcast program is allocated from a corresponding base station system in synchronization with one base station system. The method of claim 1, The received broadcast service request signal of the subscriber station in the broadcast service allocation step, Broadcasting service support method of a wireless network system for a one-way multimedia broadcasting service comprising the identity information of the subscriber and subscriber to the subscriber terminal. In a wireless network system having a processor for unidirectional multimedia broadcasting service, A broadcast service request function for receiving a broadcast service request signal from the subscriber station by a base station system currently communicating with the subscriber station; A broadcast service allocation function for transmitting the broadcast service request signal of the subscriber station received by the base station system to a multimedia broadcasting service server, receiving the validity of the subscriber station from the broadcast service server, and allocating the corresponding broadcast service; A broadcast service dedicated base station switching message transmission function of transmitting a redirection message to the subscriber station by the base station system to which the broadcast service is assigned; And The base station system to which the broadcast service is assigned and the base station system to which the broadcast service is assigned are synchronized with the subscriber station through the redirection message from the subscriber station. Service function A computer-readable recording medium having recorded thereon a program for realizing this.

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