KR100691122B1 - Method and apparatus for differently providing broadcasting contents in clustered cells over statelite communication system - Google Patents

Abstract

Disclosed are a method and a device for providing broadcast by region in a satellite communication system. The present invention provides a method comprising the steps of: A) a gap filler installed in a plurality of classified regions, code division multiplexing a broadcast signal received from a satellite into a predetermined CDM channel and assigning a different broadcast channel to each CDM channel; B) allocating the same gap filler ID to at least one gap filler belonging to one region and storing a table of the gap filler ID mapped to the CDM channel to which the broadcast channel is allocated, in the terminal; C) the gap filler to transmit a broadcast channel corresponding to the ID of the gap filler to the terminal by using a pilot channel of the code division multiplexed CDM channel, to provide a satellite broadcasting differentiated according to the region; Can be.

Satellite communications, local, broadcast, repeater

Description

Method and apparatus for providing broadcasting according to region in satellite communication system {METHOD AND APPARATUS FOR DIFFERENTLY PROVIDING BROADCASTING CONTENTS IN CLUSTERED CELLS OVER STATELITE COMMUNICATION SYSTEM}

1 is a diagram illustrating a satellite communication system for providing broadcasting according to an embodiment of the present invention.

2 illustrates an internal block diagram of a gap filler, which is a regional broadcast providing apparatus according to an embodiment of the present invention.

3 is a grouping of regions in a cell unit according to an embodiment of the present invention.

4 is a flowchart illustrating a method for providing broadcast by region in a satellite communication system according to an embodiment of the present invention.

5 is a flowchart illustrating a method for providing broadcast by region in a satellite communication system according to another embodiment of the present invention.

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

100: terminal

200: satellite

300: gap filler

400: satellite base station

500: broadcast server

The present invention relates to a broadcast providing method using a satellite communication system, and more particularly, to a broadcast providing method and apparatus for each region in a satellite communication system for providing differentiated broadcasting contents according to regions.

In general, a satellite broadcasting system uses a satellite for communication, and when a signal transmitted from a broadcasting station or a satellite base station is amplified / modulated by a satellite transponder and then transmitted to the ground, the satellite broadcasting uses a satellite antenna on the ground. Will receive. According to such a satellite broadcasting system, there is an advantage in that it is possible to provide a broadcasting service to a wide range of regions without having to maintain a large infrastructure on the ground.

However, while the satellite broadcasting system has the advantage of providing the same broadcasting service in a wide area, there has been a problem that it cannot provide a differentiated broadcasting service according to the region.

The present invention has been made in view of the above-described circumstances, and an object of the present invention is to discriminate an area in which a uniform broadcasting is provided and to provide a differentiated broadcasting content through a satellite broadcasting repeater located in the area. It is to provide a broadcast providing method and apparatus.

In the satellite communication system according to the first aspect of the present invention for achieving the above object,

A) Gap filler installed in a plurality of classified areas by code division multiplexing the broadcast signal received from the satellite into a predetermined CDM channel and assigning a different broadcast channel for each CDM channel;

B) allocating a same gap filler ID to at least one gap filler belonging to one region and storing a table of the gap filler ID mapped to the CDM channel to which the broadcast channel is allocated, in the terminal; And

C) the gap filler transmitting a broadcast channel corresponding to the ID of the gap filler to the terminal using a pilot channel among the code division multiplexed CDM channels.

In the satellite communication system according to the second aspect of the present invention for achieving the above object,

Iv) Classify the area receiving broadcast signals from a given satellite into a plurality of areas, assign the same gap filler ID to at least one or more gap fillers belonging to one classified area, and set a predetermined gap filler ID in the classified area. Becoming;

Ii) the gap filler assigning a different broadcast channel to each CDM channel by code division multiplexing the broadcast signal into CDM channels;

Iv) storing, at the terminal, a table composed of the gap filler IDs mapped to the CDM channels to which the broadcast channel is assigned; And

I) transmitting, by the gap filler, a broadcast channel corresponding to the ID of the gap filler to the terminal using a pilot channel among the code division multiplexed CDM channels.

In the satellite communication system according to the third aspect of the present invention for achieving the above object, an apparatus for providing broadcasting by region is provided.

An RF transceiver for receiving a time division multiplexed TDM signal from an satellite and transmitting a CDM channel received from a signal processor;

A signal processor for demultiplexing and demodulating to recover a broadcast signal and code division multiplexing the broadcast signal into a CDM channel; And

And a controller for matching the assigned ID with one of the CDM channels, transmitting the same CDM channel to all regions, or transmitting the CDM channel to the signal RF transceiver to transmit the CDM channel set for each region.

Therefore, according to the present invention, it is possible to provide satellite broadcasting differentiated according to a region.

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

1 is a diagram illustrating a satellite communication system for providing broadcasting according to an embodiment of the present invention.

Referring to FIG. 1, the satellite communication system according to the present invention includes a gap filler 300 which is an auxiliary relay facility for transmitting a signal received by the terminal 100, the satellite 200, and the satellite to the terminal 100. ), A broadcast server 500 for providing broadcast content, and a satellite base station 400 for transmitting the broadcast content to the terminal 100 through the satellite 200.

Preferably, the satellite communication system of the present invention, when the terminal 100 is not only a broadcast signal transmitted from the satellite 200, but also a mobile terminal capable of call connection, data transmission and reception through mobile communication (the terminal ( Interwork with the mobile communication system 600 to provide the position information of the 100 to the gap filler 300.

In the terminal 100, a gap filler ID assigned to the gap filler 300 is set. In one application example, when the gap filler ID is not set in the terminal 100, when the terminal 100 accesses the satellite broadcasting system, a list of broadcast channels selectable by the terminal 100 is displayed.

The satellite base station 400 receives broadcast content generated and / or edited by each broadcaster from the corresponding broadcast server 500 and is artificially transmitted through an uplink link of the Ku band (12.5-18 GHz). Transmit to satellite 200.

The satellite 200 amplifies the Ku band broadcast signal received from the satellite base station 400 and converts the signal of the S band. The satellite 200 sails and transmits the band-converted broadcast signal along with the Ku band signal to the service area.

The frequency band and multiplexing scheme of the broadcast signal transmitted by the satellite base station 400, the satellite 200, and the gap filler 300 will be described below.

The satellite base station 400 transmits in the Ku band by performing code division multiplexing (CDM) on the broadcast content of a plurality of channels. In addition, the satellite base station 400 time-division multiplexes (TDM) the broadcast content separately from the CDM signal and transmits the broadcast content to the satellite 200 through the Ku band or the squfeh band.

The satellite 200 converts the CDM signal into an S band among the CDM and TDM signals received from the satellite base station 400 and transmits it to the S band so that the terminal 100 at the line of sight receives and broadcasts it. Play it. In addition, the satellite 200 amplifies and transmits the TDM signal to the gap filler 300.

2 is a diagram briefly illustrating an internal structure of a gap filler as a local broadcast providing apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the gap filler 300 receives an Ku-band TDM signal from the satellite 200, converts the Ku-band TDM signal into a CD-M signal of the S band, and transmits the RF band to the RF receiver 310 and the baseband signal processor. 302, a control unit 330, and an RF transmitter 340.

Preferably, the gap filler 300 further comprises a communication module 350 for performing communication with the mobile communication system 600 or the wired network.

The RF receiver 310 receives and amplifies a broadcast signal of the TDM from the satellite 200 and converts a band into an IF band.

The baseband signal processor 320 demultiplexes and demodulates a broadcast signal of an IF band received from the RF receiver to restore a broadcast signal, and code division multiplexes the broadcast signal into a CDM channel.

The baseband signal processor 320 generates 64 CDM channels since the Walsh code of 64 chips is used when modulating the TDM signal into a CDM signal. One channel of the CDM channel is used as a pilot channel, and the remaining 63 channels are used as a broadcast channel for transmitting the broadcast content. Accordingly, different broadcast channels providing differentiated broadcast contents are allocated to the 63 CDM channels.

The control unit 330 manages the gap filler ID assigned to the gap filler 300, and transmits all 63 CDM channels through the RF transmitter 340 to the region where the gap filler 300 is involved. In an application example, the controller 330 transmits only the designated CDM channel according to the gap filler ID through the RF transmitter 340.

The operating state of the present invention configured as described above will be described.

In the present invention, providing different broadcast services for each cell at the same time is defined as 9 Localized Broadcasting Service.

[First Embodiment]

The first embodiment of the present invention proposes a method of receiving broadcast content according to a setting to a terminal 100 when transmitting the same CDM channel to a classified region as shown in FIG. 3.

Hereinafter, a method of providing broadcasting by region in a satellite communication system according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.

First, referring to FIG. 3, a hexagonal figure indicates a signal transmission area (ie, a cell) of one gap filler 300, and reference numerals 900, 920, 940, 960, and 980 denote at least One or more cells are grouped together. The gap filler ID is assigned to the gap filler 300 belonging to the grouped area. For example, all the gap fillers belonging to the region of reference numeral 900 have a gap filler ID of ID # 1, and all of the gap fillers belonging to the region of reference numeral 920 have an ID of # 2.

The gap filler 300 receiving the broadcast signal from the satellite 200 performs CDM modulation and allocates a broadcast channel to the modulated CDM channel (S400 and S410).

As described above, regions in which the satellite 200 transmits broadcast signals are grouped as shown by reference numerals 900 to 980, and a gap filler ID is assigned to each gap filler (S420).

In addition, the terminal 100 stores a table in which a gap filler ID matching the CDM channel and the CDM channel is recorded in a predetermined memory (S430). The method of transmitting the table to the terminal 100 may be transmitted through the satellite 200 or the gap filler 300, and the terminal 100 may be connected to the mobile communication system 600. In this case, it is possible to receive the table through the mobile communication system 600.

The gap filler 300 transmits the modulated CDM channel to a management region, and according to the first embodiment, the gap filler 300 in all regions receiving the broadcast signal transmitted from the satellite 200 is the same CDM. The channel is transmitted to the terminal 100 (S440).

In this case, when a predetermined gap filler ID is set in the terminal 100, for example, when ID # 1 is set in the terminal 100, the gap is generated when the terminal 100 is located in an area of reference numeral 900. It is possible to receive and reproduce the broadcast signal transmitted from the filler 300 (S450, S460).

However, when a predetermined gap filler ID is not set in the terminal 100, it is possible to receive all CDM channels provided by the gap filler 300, that is, all broadcast channels, and the broadcast channels are listed. And displayed on the screen of the terminal 100 (S470).

Therefore, when the user of the terminal 100 selects one of the broadcast channels, it is possible to receive a desired broadcast.

Second Embodiment

According to a second embodiment of the present invention, a method of receiving broadcast content according to a setting in a terminal 100 when different CDM channels are transmitted to a classified area as shown in FIG. 3 is provided.

Hereinafter, a method for providing broadcasting by region in a satellite communication system according to another embodiment of the present invention will be described with reference to FIG. 5.

The gap filler 300 modulates the broadcast signal of the TDM received from the satellite 200 into the CDM, and allocates a broadcast channel to the CDM signal (S500 and S510).

As shown in FIG. 3, a gap filler ID is allocated to the divided regions, and the terminal 100 stores a table in which a gap filler ID matching the CDM signal is written in a predetermined memory (S520 and S530).

The gap filler 300 transmits a different CDM channel for each divided region (S540). For example, the first CDM channel classified with the Walsh code is allocated to the region having the gap filler ID ID # 1, and the second CDM channel classified with the Walsh code is allocated to the region having the gap filler ID ID # 2.

In this case, when the gap filler ID is set in the terminal 100, for example, when ID # 1 is set in the terminal 100, the gap is provided when the terminal 100 is located in an area of reference numeral 900. It is possible to receive and reproduce the first broadcast signal corresponding to the first CDM channel transmitted from the filler 300 (S550 and S560).

However, when a predetermined gap filler ID is not set in the terminal 100, a channel provided by the gap filler 300 is specified according to the position of the terminal 100. For example, when the terminal 100 is located in an area where the gap filler ID is ID # 1, the terminal 100 receives a first broadcast channel corresponding to the ID # 1, and the terminal 100 has a gap filler ID ID # 2. If the location is located in the area, the second broadcast channel corresponding to the ID # 2 is received and the broadcast is reproduced on the screen of the terminal 100 (S570).

In an application example, when the terminal 100 is a terminal capable of communication using the mobile communication system 600, the terminal 100 receives its own location information from the mobile communication system 600 and receives a broadcast channel according to the location information. Play it.

As described in detail above, according to the method and apparatus for providing broadcasting for each region in the satellite communication system of the present invention, it is possible to efficiently provide a localized broadcasting service, and to provide a differentiated fixed broadcasting service for each gap filler. In addition to anonymity, it is possible to provide a broadcasting service reflecting each individual's preferences.

In addition, as a method of providing clustered cells by expanding one cell, which is one gap filler coverage, to provide the same broadcast service in the grouped area, the area of the same local broadcast service is selected according to a manager's choice. You can easily change it.

In addition, when different CDM channels are used for each clustered cell, interference can be reduced by providing a local broadcast to another CDM channel for interference at the border area, and at the same time, a different CDM channel is provided to the user. It is effective to widen the range of local broadcasting services by allowing the user to select.

In addition, when setting a plurality of CDM channels in each grouped area, a user can select a channel by the user of the terminal, and the user can change to another broadcast channel when a broadcast service is not provided or when a user wants to watch another broadcast. This has the advantage that it is possible to facilitate the user.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

Claims (16)

A) Gap filler installed in a plurality of classified areas by code division multiplexing the broadcast signal received from the satellite into a predetermined CDM channel and assigning a different broadcast channel for each CDM channel; B) allocating a same gap filler ID to at least one gap filler belonging to one region and storing a table of the gap filler ID mapped to the CDM channel to which the broadcast channel is allocated, in the terminal; And C) the gap filler transmits a broadcast channel corresponding to the ID of the gap filler to the terminal by using a pilot channel of the code division multiplexed CDM channel to the terminal; Way. The method of claim 1, wherein in step A), And providing a broadcast signal for each region in a satellite communication system, wherein the broadcast signal is modulated into a CDM channel using a Walsh code having a length of 64 chips. The method according to claim 1 or 2, wherein the method D) determining whether a specific gap filler ID is set in the terminal; And E) if a specific gap filler ID is set as a result of the determination of step D), further comprising receiving the broadcast signal from a gap filler having the same ID as the gap filler ID set in the terminal; How to deliver broadcasts by region The method of claim 3, wherein the method is F) When a specific gap filler ID is not set in the terminal and a broadcast channel read from a table stored in the terminal is selected by a user, the gap filler transmits a broadcast signal corresponding to the broadcast channel to the terminal. The method of providing a broadcast for each region in the satellite communication system, characterized in that it further comprises the step. The method according to claim 1 or 2, wherein the method When the terminal is a terminal capable of communication using a mobile communication network, the gap filler obtaining location information of the terminal from the mobile communication network; And And providing a broadcast signal to the mobile terminal by a gap filler installed in an area according to the location information. The method of claim 5, wherein the gap filler receives location information of the terminal from a mobile communication network using a wired or wireless network. Iv) Classify the area receiving broadcast signals from a given satellite into a plurality of areas, assign the same gap filler ID to at least one or more gap fillers belonging to one classified area, and set a predetermined gap filler ID in the classified area. Becoming; Ii) the gap filler assigning a different broadcast channel to each CDM channel by code division multiplexing the broadcast signal into CDM channels; Iv) storing, at the terminal, a table composed of the gap filler IDs mapped to the CDM channels to which the broadcast channel is assigned; And Iv) the gap filler transmitting a broadcast channel corresponding to the ID of the gap filler to the terminal by using a pilot channel among the code division multiplexed CDM channels; Way. The method of claim 7, wherein in step iii), Iii-1) querying a gap filler ID set in the terminal connected to the gap filler; And Iv-2) if the gap filler ID of the terminal and the ID of the gap filler connected to the terminal match, transmitting the broadcast signal corresponding to the gap filler ID to the terminal by the gap filler; Local broadcasting providing method in the satellite communication system. The method of claim 7, wherein in step iii), Iii-1) When a specific gap filler ID is set in the terminal, broadcasting by the broadcast channel only when a gap filler ID set in the terminal and an ID of a gap filler transmitted in a gap filler installed in the region where the terminal is located are matched. And a signal is received at the terminal. The method of claim 7, wherein the method comprises: Iv) obtaining location information of the terminal from the mobile communication network when the terminal is a terminal capable of communication using a mobile communication network; And Iv) a gap filler installed in an area according to the location information, transmitting a predetermined broadcast signal to the mobile terminal; The method of claim 10, wherein the gap filler receives location information of the terminal from a mobile communication network using a wired or wireless network. The method of claim 11, wherein in step iii): And providing a broadcast signal for each region in a satellite communication system, wherein the broadcast signal is modulated into a CDM channel using a Walsh code having a length of 64 chips. An RF transceiver for receiving a time division multiplexed TDM signal from an satellite and transmitting a CDM channel received from a signal processor; A signal processor for demultiplexing and demodulating to recover a broadcast signal and code division multiplexing the broadcast signal into a CDM channel; And And a controller for matching the assigned ID with one of the CDM channels, transmitting the same CDM channel to all regions, or transmitting the CDM channel to the signal RF transceiver to transmit a CDM channel set for each region. Region-specific broadcasting providing apparatus in a satellite communication system, characterized in that. The method of claim 13, wherein the signal processing unit, And a broadcast signal for each region in a satellite communication system, wherein the broadcast signal is modulated into a CDM channel using a Walsh code having a length of 64 chips. The method according to claim 13 or 14, wherein the device, Apparatus for providing regional broadcasting in a satellite communication system, characterized in that to transmit the ID to the terminal using a pilot channel of the CDM channel. The method of claim 15, wherein the device, And a communication module for receiving the location information required for searching for and transmitting the CDM channel according to the location information of the terminal to the terminal.

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