KR20080001816A - Method for switching broadcasting network in mobile multimedia broadcasting system - Google Patents

Abstract

A method for switching a broadcasting network in a satellite broadcasting system for vehicles is provided to supply broadcasting signals immediately through a wireless access network when entering a fringe area such as the downtown area or skyscraper, thereby implementing a seamless broadcasting service with superior quality. If a satellite broadcasting reception request is received from a user, intensity of a transmission signal of a satellite broadcasting network and intensity of a transmission signal of a wireless access network are respectively detected(S302,S304). If the intensity of the transmission signal of the satellite broadcasting network is bigger than the intensity of the transmission signal of the wireless access network, a set top box is connected to the satellite broadcasting network to receive a broadcasting signal(S306,S312). If not so, the set top box is connected to the wireless access network to receive the broadcasting signal(S308).

Description

Broadcasting network switching method of vehicle satellite broadcasting system {METHOD FOR SWITCHING BROADCASTING NETWORK IN MOBILE MULTIMEDIA BROADCASTING SYSTEM}

1 is a schematic block diagram of a vehicle satellite broadcasting system for implementing a method according to the present invention;

2 is an internal configuration diagram of a vehicle satellite set top box of FIG.

3 is a flowchart of a process of switching a broadcast network of a vehicular satellite broadcasting system according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: car satellite set top box

102: satellite broadcasting network

104: PDSN

106: IP network

108: wireless access network

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcasting system for a vehicle, and more particularly, to a method for converting a broadcasting network of a satellite broadcasting system for a vehicle suitable for solving astigmatism occurring when a large city area is moved.

In recent years, as the living conditions are advanced, families often go out for leisure, and when they go out, they use a car, which is a means of transportation, to watch boredom in a narrow space. Equipped with satellite broadcasting system that can move while watching satellite broadcasting.

In addition, the satellite broadcasting system receives and watches the satellite while detecting, tracking, and watching the strength of the satellite broadcasting signal transmitted from the satellite using an antenna composed of a gyro sensor, a motor, and a motor controller.

Therefore, when a vehicle passes through a high-rise building or a roadside side street, the straight high frequency 11 to 30 GHz satellite signals transmitted due to the frequency characteristics of the satellite broadcasting cannot be received because they are blocked or shadowed by the high-rise building and the roadside tree. You will not be able to watch.

In addition, a screen holding function is added to operate a screen when passing through an area where a long time signal is blocked such as a tunnel while driving.

As described above, in the conventional satellite broadcasting system, the satellite signal is frequently cut off in the case of a vehicle mainly operating in an urban area or a vehicle using an outer ring road or a national road with a large number of roads, so that a so-called 'hard-viewing area' exists so that a good satellite It is not possible to enjoy broadcasting, and especially drivers of buses and large vehicles cannot afford to pay attention to the reception status of the satellite broadcasting system in order to drive the vehicle safely. I have a problem that is offensive to me.

The present invention is to solve the above-described problems of the prior art, the satellite broadcasting network and a wireless access network, for example, WiBro (WiBro: Wireless Broadband Internet) in the overlay area (overlay area) where the network is constructed, the blind spot of satellite broadcasting is detected It is an object of the present invention to provide a method for converting a broadcast network of a satellite broadcasting system for a vehicle which can provide better viewing by automatically switching to a wireless access network.

According to a preferred embodiment of the present invention for achieving the above object, a broadcast network switching method of a satellite broadcasting system for a vehicle that receives a broadcast signal in an overlay area in which a satellite broadcasting network and a wireless access network are commonly established, a satellite broadcasting reception request from a user Detecting the strength of the transmission signal of the satellite broadcasting network and the strength of the transmission signal of the wireless access network, and connecting the set-top box to the satellite broadcasting network if the transmission signal strength of the satellite broadcasting network is greater than that of the wireless access network. Receiving a broadcast signal, and connecting a set-top box to the wireless access network to receive a broadcast signal if the transmission signal strength of the satellite broadcasting network is less than the transmission signal strength of the wireless access network. Provides a method for switching the broadcasting network.

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

Prior to the description of the embodiments, the core technical aspect of the present invention is that when the vehicle equipped with the satellite broadcasting system exists in an area where the satellite broadcasting network and the wireless access network are overlaid, the strength of the transmission signal is greater by detecting the respective transmission signal strengths. By connecting the set-top box to the service network of the service to watch the seamless broadcast, it will be easy to achieve the object of the present invention from this technical idea.

1 is a schematic block diagram of a vehicle satellite broadcasting system for implementing a method according to the present invention, a vehicle satellite set top box 100, a satellite broadcasting network 102, a packet data serving node (PDSN) 104, IP network 106.

As shown, the vehicle satellite set-top box 100 is a broadcast transmission / reception means mounted in a satellite broadcasting system in a vehicle, and is a broadcast service server (not shown) connected to the satellite broadcasting network 102 or the wireless access network 108. In addition to the function of communicating with the light source and the like, the basic function includes a function of receiving / converting video signals. In particular, the vehicle satellite set-top box 100 is mounted on a vehicle DMB, a vehicle LCD TV, etc. to provide an environment that can provide high quality broadcasting information while moving at high speed.

The satellite broadcasting network 102 may be composed of a broadcasting satellite, a satellite antenna, and the like, and transmits an image signal from a broadcasting service server provided through the PDSN 104 to be described later to the vehicle satellite set top box 100. In addition, the satellite broadcasting network 102 serves to provide the PDSN 104 with information of the vehicle satellite broadcasting system provided from the vehicle satellite set top box 100.

The PDSN 104 manages sessions to service data through the satellite broadcasting network 102 and / or the radio access network 108 as packet data, and transmits and receives packet data to the IP network 106.

The IP network 106 provides an internet protocol environment for serving packet data between the broadcast service server and the vehicle satellite broadcasting system.

The wireless access network 108 may be, for example, a Wibro network, and wirelessly connects the vehicle satellite set top box 100 with the PDSN 104 to provide broadcast information. The wireless access network 108 includes a radio access station (RAS) serving as a base station of a WiBro system and an access concentration router (ACR), which is a packet access router that accommodates a plurality of RASs.

2 is a diagram illustrating an internal configuration of the vehicle satellite set top box of FIG. 1.

The vehicle satellite set top box applied to the present embodiment includes a satellite receiver 10, a wireless internet platform 12, and a browser 14 for wireless internet access.

The satellite receiver 10 serves to receive broadcast information from the wireless access network 108, the wireless internet platform 12 drives the wireless Internet-related applications of the vehicle satellite broadcasting system, the browser 14 for wireless Internet access Provides an environment for connecting to a wireless access network 108.

Accordingly, the vehicle satellite set-top box 100 according to the present embodiment may receive a broadcast signal by accessing the wireless access network 108 while watching a broadcast through the satellite broadcast network 102.

Hereinafter, with reference to the above-described configuration, with reference to the flowchart of Figure 3 attached to the broadcast network switching process of the vehicle satellite broadcasting system according to a preferred embodiment of the present invention will be described in detail. Prior to the description of the embodiment, this process is based on the assumption that the vehicle equipped with the vehicle satellite set-top box 100 first enters the overlay area where both the satellite broadcasting network 102 and the wireless access network 108 are constructed. do.

As in step S300 of FIG. 3, when the vehicle satellite set top box 100 is activated, the vehicle satellite broadcasting system proceeds to step S302 to determine whether satellite broadcasting reception is requested from the user.

As a result of the determination of step S302, when the satellite broadcast reception is requested, the vehicle satellite broadcasting system proceeds to step S304 to signal strength of the transmission signal of the satellite broadcasting network 102 and signal strength of the transmission signal of the wireless access network 108. Are detected respectively.

After performing step S304, the vehicular satellite broadcasting system proceeds to step S306 to determine whether the current vehicle is located in an astigmatic region of the satellite broadcasting network 102, more preferably, the transmission signal strength of the satellite broadcasting network 102 is wireless. It is determined whether the transmission signal strength of the access network 108 is less.

As a result of the determination in step S306, when the transmission signal strength of the satellite broadcasting network 102 is less than the transmission signal strength of the wireless access network 108, the vehicle satellite broadcasting system proceeds to step S308 to the wireless access network 108. Connect the vehicle satellite set-top box 100. Accordingly, the user can watch a broadcast through the wireless access network 108.

Thereafter, in step S310, it is determined whether the current vehicle has left the service area of the wireless access network 108, and if the vehicle has left the service area, the vehicle satellite broadcasting system proceeds to step S312 and the satellite broadcasting network 102 Connect the satellite set-top box 100 for the vehicle. Accordingly, the user can watch the broadcast through the satellite broadcast network 102.

On the other hand, when the transmission signal strength of the satellite broadcasting network 102 is greater than the transmission signal strength of the radio access network 108 as a result of the determination in step S306, the vehicle satellite broadcasting system immediately proceeds to step S312. The satellite broadcasting network 102 connects the vehicle satellite set top box 100.

As described above, the present invention implements to receive a broadcast signal by selecting the strongest signal strength by continuously comparing the strength of the signal transmitted through the satellite broadcasting network and the signal transmitted through the wireless access network in a vehicle satellite set-top box will be.

As mentioned above, although this invention was demonstrated concretely based on the Example, this invention is not limited to such an Example, Of course, various deformation | transformation are possible for it within the technical idea and the scope of a claim mentioned later.

According to the present invention, in a vehicle satellite broadcasting system equipped with a set-top box capable of watching satellite broadcasting, by implementing a broadcast signal through a wireless access network immediately when entering an astigmatism area such as an urban area or a building forest, A broadcast service can be implemented.

Claims (3)

A broadcasting network switching method of a satellite broadcasting system for a vehicle that receives a broadcasting signal in an overlay area in which a satellite broadcasting network and a wireless access network are commonly constructed. Detecting the strength of the transmission signal of the satellite broadcasting network and the strength of the transmission signal of the wireless access network when a satellite broadcasting reception is requested from a user; Receiving a broadcast signal by connecting a set-top box to the satellite broadcasting network if the transmission signal strength of the satellite broadcasting network is greater than that of the wireless access network; Receiving a broadcast signal by connecting a set-top box to the wireless access network when the transmission signal strength of the satellite broadcasting network is less than that of the wireless access network; Broadcasting network switching method of a vehicle satellite broadcasting system comprising a. The method of claim 1, The method, And connecting the set-top box to the satellite broadcasting network and receiving a broadcast signal when the vehicle satellite broadcasting system leaves the service area of the wireless access network. The method of claim 1, The wireless access network, Broadcasting network switching method of a vehicular satellite broadcasting system, characterized in that the WiBro (WiBro) network.

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