KR20030029678A - The supporting method of wireless network system for the one direction multimedia broadcasting service - Google Patents

Abstract

PURPOSE: A broadcast service support method of a radio network system for a uni-directional multimedia broadcast service is provided to avoid a hand-off and new location registration when a subscriber terminal is moved between base stations by using a base station system employing the same PN code in a frequency zone for a specific multimedia broadcast. CONSTITUTION: A subscriber terminal transmits the first broadcast service request signal according to a desired broadcast channel to a base station system(100). The base station system checks subscriber identification information contained in the first broadcast service request signal(110). If the subscriber is judged to be disqualified, the base station system transfers a subscriber-unidentified judgment signal to the subscriber terminal(120). If the subscriber is judged to be qualified, the base station system transmits the second broadcast service request signal to a multimedia broadcast service server(130). The multimedia broadcast service server checks whether the subscriber is eligible for the corresponding service(140). If the multimedia broadcast service server judges that the subscriber is not eligible, it transfers a corresponding service non-eligible judgment signal to the subscriber terminal(150). If the multimedia broadcast service server judges that the subscriber is eligible, it assigns a broadcast service received from a multimedia broadcast system to the base station system(160). The base station system transfers a redirection message to the subscriber terminal(170). As the subscriber terminal is tuned with the multimedia broadcast system, a broadcast service is initiated corresponding to the first broadcast service request signal(180).

Description

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

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 to prevent handoff and new location registration when moving between base stations, and generates diversity effect by demodulating the signals of all the neighbor base stations providing the broadcasting 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. Accordingly, mobile communication providers are also proposing different broadcasting service ideas that are differentiated in order to implement services suitable for the development of wireless networks, and also develop products suitable for them.

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. The purpose of the present invention is to provide a broadcast service support method for a wireless network system.

Meanwhile, the present invention uses a base station system that uses the same PN code in a dedicated frequency domain for a multimedia broadcasting service, so that the subscriber station recognizes the base stations as one base station, and moves handoffs and new positions between base stations. A program for realizing a broadcasting service support method of a wireless network system for a one-way multimedia broadcasting service, which prevents registration from occurring and generates diversity effects by demodulating the signals of all neighboring base stations providing a broadcasting service. Its purpose is to provide a computer readable recording medium having recorded thereon.

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)

A method of the present invention for achieving the above object is a base station system having the same pseudo noise code (PN Code) in the dedicated frequency domain for the multimedia broadcasting service in a broadcasting service supporting method of a wireless network system for unidirectional multimedia broadcasting service. Receiving a first broadcast service request signal from a subscriber station in a first step; A second step of transmitting a second broadcast service request signal to a multimedia broadcasting service server by identifying a subscriber in a base station system that has received the first broadcast service request signal; The base station system receives a broadcast service corresponding to the second broadcast service request signal from the multimedia broadcasting system by examining a broadcast service server that has received the second broadcast service request signal to determine whether the subscriber whose identity has been identified is a valid subscriber for the corresponding service. Assigning to a third step; And a fourth step of allocating a channel by transmitting a redirection message to the subscriber station from the base station system assigned the broadcast service, wherein the subscriber station and the broadcast service system are synchronized with each other through the allocated channel. It is characterized in that to support the multimedia broadcasting service is started.

Meanwhile, the present invention provides a wireless network system for unidirectional multimedia broadcasting service, comprising: a first broadcast service request signal received from a subscriber station in a base station system having the same PN code under the multimedia broadcasting service; function; A second function of transmitting a second broadcast service request signal to a multimedia broadcasting service server by identifying a subscriber in a base station system that has received the first broadcast service request signal; The base station system receives a broadcast service corresponding to the second broadcast service request signal from the multimedia broadcasting system by examining a broadcast service server that has received the second broadcast service request signal to determine whether the subscriber whose identity has been identified is a valid subscriber for the corresponding service. A third function to assign to; And a fourth function of allocating a channel by transmitting a redirection message to the subscriber station from the base station system assigned the broadcast service, wherein the subscriber station and the broadcast service system are synchronized with each other through the allocated channel. Provided is a computer readable recording medium having recorded thereon a program for realizing support for starting a multimedia broadcasting service.

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 according to the present invention operates based on a wireless information communication network 50 and includes a subscriber station 10, a base station system 20, a multimedia broadcasting system ( 30), and a multimedia broadcasting service server 40.

The unidirectional multimedia broadcasting service according to the present invention 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, but performs various programs according to time slots and desired by the subscriber. When switching to that channel.

In order to implement such a multimedia broadcasting service, it is necessary to first implement a dedicated dedicated FA (Frequency Assignment) for broadcasting and to distinguish a dedicated broadcast channel for broadcasting. Here, the broadcasting dedicated FA means a broadcasting dedicated frequency band. 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 according to 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. The method of installing and servicing a dedicated macro base station for broadcasting has many conveniences, but there is a difficulty in coverage, and using existing base stations, various supplementary work are required. In other words, general subscribers should not be allowed to enter the dedicated broadcasting FA, and 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). Station (80), a base station controller (BSC: Base Station Controller) (70), a mobile switching center (MSC: Mobile Switching Center) (MSC) (60) and the broadcast service is allocated from the multimedia broadcasting service server 40 redirected 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 dedicated frequency channel for multimedia broadcasting, 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. 10, handoff and new location registration do not occur when the base station moves, 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.

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 thereafter, 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.

After receiving the first broadcast service request signal, the base station system 20 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 broadcast 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). In case of ineligible determination of the corresponding service, the corresponding service ineligibility determination signal is transmitted to the subscriber station 10 (150), and in case of determining the ineligibility of the corresponding 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 dedicated frequency channel for multimedia broadcasting, Walsh code, and PN code information.

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.

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 apparent 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 domain under a multimedia broadcasting service. Off and new location registration does not occur, it is effective to generate a diversity effect by the terminal demodulates the signals of all the neighbor base stations providing the broadcast service.

Claims (7)

In the multimedia broadcasting service support method of a wireless network system, A first step of receiving a first broadcast service request signal from a subscriber station in a base station system having the same PN code in a dedicated frequency domain for the multimedia broadcasting service; A second step of transmitting a second broadcast service request signal to a multimedia broadcasting service server by identifying a subscriber in a base station system that has received the first broadcast service request signal; The broadcast service server receiving the second broadcast service request signal checks whether the subscriber whose identity has been identified is a valid subscriber for the corresponding service, receives a broadcast service corresponding to the second broadcast service request signal from the multimedia broadcasting system, and receives a base station. Assigning to the system; And And a fourth step of allocating a channel by transmitting a redirection message to the subscriber station from the base station system assigned the broadcast service, wherein the subscriber station and the broadcast service system are tuned through the allocated channel. And a method for supporting a multimedia broadcasting service corresponding to a first broadcast service request signal. The method of claim 1, When the multimedia broadcasting service is terminated, a fifth step in which a user equipment and a base station providing the service are tuned to a frequency domain for providing a general voice or data service; Broadcast service support method of a wireless network system for a one-way multimedia broadcasting service further comprising. The method of claim 1, The base station system, Broadcasting service support of a wireless network system for a one-way multimedia broadcasting service comprising a base station (BTS), a base station controller (BSC), a mobile switching center (MSC) Way. The method of claim 1, The first broadcast service request signal, Broadcast service support method of a wireless network system for a one-way multimedia broadcasting service comprising the subscriber's identity information and the broadcast channel information desired by the subscriber. The method of claim 1, The second broadcast service request signal is A method of supporting a broadcast service of a wireless network system for unidirectional multimedia broadcasting service, comprising subscriber's previously identified identity information and broadcast channel information desired by the subscriber. The method according to any one of claims 1 to 5, The redirect message is A broadcasting service supporting method of a wireless network system for unidirectional multimedia broadcasting service, comprising: a dedicated frequency channel for multimedia broadcasting, Walsh (Walsh) code, and PN code information. In a wireless network system for a one-way multimedia broadcasting service having a processor, A first function of receiving a first broadcast service request signal from a subscriber station in a base station system having the same PN code under the multimedia broadcasting service; A second function of transmitting a second broadcast service request signal to a multimedia broadcasting service server by identifying a subscriber in a base station system that has received the first broadcast service request signal; The base station system receives a broadcast service corresponding to the second broadcast service request signal from the multimedia broadcasting system by examining a broadcast service server that has received the second broadcast service request signal to determine whether the subscriber whose identity has been identified is a valid subscriber for the corresponding service. A third function to assign to; And And a fourth function of allocating a channel by transmitting a redirection message to the subscriber station from the base station system assigned the broadcast service, wherein the subscriber station and the broadcast service system are synchronized with each other through the allocated channel. A computer-readable recording medium having recorded thereon a program for realizing that a broadcast service is started.