KR20070120064A - System and method for identifyng broadcast service in digital broadcast system - Google Patents

Abstract

A system and a method for identifying a broadcast service in a digital broadcast system are provided to solve a problem that although a terminal performs handover to a network in which the same service as that provided in a previous network is provided, it cannot recognize whether the same broadcast service is provided with only a transport stream ID because the transport stream ID is solely allocated within the original network. A PSI/SI(Program Specific Information/System Information)(212) generates PSI/SI including broadcast information with respect to a multi-broadcast service. A multiplexer(214) generates a multi-broadcast service by multiplexing broadcast services, inserts a multi-broadcast service ID indicating a multi-broadcast service transmitted via a transport stream and an original network ID indicating a network in which the multi-broadcast service has been generated into the PSI/SI in order to discriminate the multi-broadcast service, inserts the multi-broadcast service ID for discriminating the transport stream, the original network ID, and a network ID indicating a network to which the transport stream is to be transmitted into the PSI/SI, includes the PSI/SI and the multi-broadcast service in the transport stream, and transmits the same.

Description

Broadcasting service identification system and method in digital broadcasting system {SYSTEM AND METHOD FOR IDENTIFYNG BROADCAST SERVICE IN DIGITAL BROADCAST SYSTEM}

FIG. 1A is a diagram illustrating a concept between a transport stream, a multiple broadcast service, and broadcast service information (PSI / SI) in a digital broadcasting system to which the present invention is applied;

1B is a view for explaining a relationship between a transport stream and a multicast service in a digital broadcasting system to which the present invention is applied;

1C to 1D are diagrams for explaining definitions and relationships between a multiple broadcast service (Multiplex), broadcast service information (PSI / SI), a transport stream, and an original network in a digital broadcasting system to which the present invention is applied;

2 is a diagram illustrating a concept for distinguishing a transport stream and a multicast service in a digital broadcasting system according to a first embodiment of the present invention;

3 is a flowchart illustrating a multiplexer for transmitting a multicast service according to a first embodiment of the present invention;

4 is a method flowchart of a terminal for receiving a multicast service according to a first embodiment of the present invention;

5 is a diagram illustrating a concept for distinguishing a multiplex service (Multiplex) in a digital broadcasting system according to a second embodiment of the present invention;

6 is a method flowchart of a multiplexer for transmitting a multicast service according to a second embodiment of the present invention;

7 is an operation flowchart of a terminal for receiving a multicast service according to a second embodiment of the present invention;

8 is a block diagram of a terminal according to an embodiment of the present invention.

The present invention relates to a digital broadcast system, and more particularly, to a system and method for identifying a broadcast service in a digital broadcast system.

In general, a broadcast service is a service provided for the purpose of providing all users with a terminal. Such broadcast services are classified into audio broadcasting services such as radio broadcasting providing only voice, and multimedia broadcasting services including video-oriented services such as television providing voice and video services and voice, video and data services. These broadcast services are developing from analog to digital.

Due to the development of these technologies, digital broadcasting systems are able to provide users with high quality and mobility that were difficult to implement in analog broadcasting, and are meeting the rapidly growing market demands and users' needs by converging with mobile communication systems.

Representative systems of such digital broadcasting systems are DVB-H (Digital Video Broadcast-Handheld) and CBMS (Convergence of Broadcast and Mobile Services).

In the digital broadcasting system described above, a multiple broadcast service (Multix) in which broadcast data is multiplexed and broadcast service information including information for receiving the broadcast services (Program Specific Information / System Information: PSI / SI) is transmitted through a transport stream (TS).

A multiple broadcast service is a set of DVB services in which multiple broadcast services are multiplexed and transmitted through a transport stream in one physical channel, and the transport stream carries one multicast service and broadcast service information.

The transport stream carrying the multicast service and the multicast service is identified by Transport_stream_id and original_network_id included in SI (System Information) information. Transport_stream_id is unique within original_network_id, and original_network_id means network_id of DVB network generating multicast service.

The DVB network can be identified by network_id, where the multicast service is a set of DVB services multiplexed, and the transport streams are bit streams that carry the multicast service and its associated PSI / SI information. Multiple broadcast services can be transmitted on multiple DVB networks, but the transport stream is uniquely assigned to one DVB network. Network_id, which is the network identifier of the DVB network that transmits the transport stream, is indicated in the NIT_actual of the Network Information Table (NIT) of the PSI / SI information and is carried through the transport stream.

DVB service can be distinguished by three identifiers (Service_id, Original_network_id, transport_stream_id) as a whole and uniquely.

In a general digital broadcasting system, even if a terminal hands over to a network providing the same broadcast service as that provided in the network before the handover, the transport stream identifier is uniquely assigned in the original network where each transport stream is generated. Therefore, the UE may not know whether the same broadcast service is provided using only the transport stream identifier.

The present invention provides a system and method for distinguishing a broadcast service from a digital broadcast system.

The present invention provides a system and method for distinguishing multiple broadcast services for each network in a DVB-H system.

In the digital broadcasting system according to the present invention, a method for identifying a broadcast service by a network includes: generating a multicast service by multiplexing the broadcast services; and broadcasting service information (PSI / PSI) including broadcast information on the multicast service. SI), a transport stream identifier (Transport_stream_id) representing a transport stream for transmitting the multicast service to identify the multicast service in the broadcast service information, and a network for generating the multicast service. Inserting an original network identifier (Original_network_id), the transport stream identifier (Transport_Stream_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and a network to which the transport stream is to be transmitted. Directing net The process and, the broadcast service information and the multiple broadcast services to insert size identifier (Network_id) comprises the step of transmitting loaded on the transport stream.

In a digital broadcasting system according to the present invention, a method for a terminal to identify a broadcast service includes receiving a transport stream from a network, parsing broadcast service information (PSI / SI) of the transport stream, and transmitting the broadcast service information to the broadcast service information. Searching for a transport stream to be received using a transport stream identifier (transport_stream_id) indicating the received transport stream included and an original network identifier (original_network_id) indicating a network where a multicast service is generated, and transmitting the desired transport When the stream is found, the multicast service that is identical to the multicast service provided before the handover is identified using the transport stream identifier, the original network identifier, and a network identifier (network_id) indicating the network through which the transport stream is transmitted. Po Course The.

In the digital broadcasting system according to the present invention, a method for identifying a broadcast service by a network includes: generating a multicast service by multiplexing the broadcast services; and broadcasting service information (PSI / PSI) including broadcast information on the multicast service. A multicast service identifier (multiplex_id) indicating a multicast service transmitted through the transport stream to identify the multicast service in the broadcast service information, and a network in which the multicast service is generated. Inserting an original network identifier (Original_network_id) indicating the ID, the multicast service identifier (multiplex_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and the transport stream is transmitted. To instruct the network to be The process of inserting a network identifier (Network_id) and the broadcast service information with the multiple broadcasting service, comprising the step of transmitting loaded on the transport stream.

In a digital broadcasting system according to the present invention, a method for a terminal to identify a broadcast service includes receiving a transport stream from a network, parsing broadcast service information (PSI / SI) of the transport stream, and transmitting the broadcast service information to the broadcast service information. Searching for a transport stream to be received using an included multiple broadcast service identifier (multiplex and original network identifier); and if the transport stream to be received is found, the broadcast service information of the received transport stream is included. And identifying the same multicast service as the multicast service provided before the handover by using the multicast service identifier and the original network identifier and the network identifier.

In a digital broadcasting system according to the present invention, a system for identifying a broadcast service by a network includes a broadcast service information generation unit for generating broadcast service information (PSI / SI) including broadcast information for a multicast service, and broadcast services. A multiplexing service to generate a multicast service, a transport stream identifier (Transport_stream_id) indicating a transport stream for transmitting the multicast service to identify the multicast service in the broadcast service information, and a network in which the multicast service is generated; Inserting an original network identifier (Original_network_id) indicating, the transport stream identifier (Transport_Stream_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and indicates the network to which the transport stream will be transmitted Yes Inserts a walk identifier (Network_id), the multiplexer for carrying the broadcast service information and the multi-cast service in the transport stream, and receives the transport stream, parsing the broadcast service information (PSI / SI) of the transport stream Search for a transport stream to be received using a transport stream identifier (transport_stream_id) indicating the received transport stream included in the broadcast service information and an original network identifier (original_network_id) indicating a network where a multicast service is generated; When the transport stream to be received is found, the same multicasting service as the multicasting service provided before the handover using the transport stream identifier, the original network identifier, and a network identifier (network_id) indicating the network through which the transport stream is transmitted. Service To include a terminal identification.

In a digital broadcasting system according to the present invention, a system for identifying a broadcast service by a network includes a broadcast service information (PSI / SI) generation unit for generating broadcast service information (PSI / SI) including broadcast information about a multicast service. And a multiple broadcast service identifier (multiplex_id) indicating a multiple broadcast service transmitted through the transport stream to multiplex broadcast services to generate a multicast service, and identify the multicast service in the broadcast service information. Inserting an original network identifier (Original_network_id) indicating a network where a broadcast service is generated, the multicast service identifier (multiplex_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and the Supports the network to which the transport stream will be sent. A multiplexer for inserting a network identifier (Network_id) to transmit the broadcast service information and the multicast service to the transport stream, receiving the transport stream, and receiving broadcast service information (PSI / SI) of the transport stream. Parsing to search for a transport stream to be received using a multiple broadcast service identifier (multiplex_id) and an original network identifier (original_network_id) included in the broadcast service information, and if the transport stream to be received is found, the received And a terminal for identifying the same multicasting service as the multicasting service provided before handover by using the multicasting service identifier included in the broadcast service information of the transport stream, the original network identifier, and the network identifier.

DETAILED DESCRIPTION Hereinafter, detailed descriptions of preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the same components in the figures are represented using the same numerals wherever possible. Specific details are set forth in the following description, which is provided to aid a more general understanding of the invention. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The terms used in the present specification may be changed, but the basic concept of the present invention will be applied even if the terms are changed.

FIG. 1A is a diagram illustrating a concept between a transport stream, a multiple broadcast service, and broadcast service information (PSI / SI) in a digital broadcasting system to which the present invention is applied. Transport stream used in the present invention The TS, the multicast service, and the broadcast service information may be briefly represented as shown in FIG. 1A.

In FIG. 1A, reference numeral A denotes an entire stream transmitted in a network, and will be called a transport stream in the present specification. However, it may also be called TS byte stream or other terms.

B is the content (broadcast service set) transmitted in A, and may be called a multicast service in the present invention, and may also be referred to as transport stream, service multiplexing, or other terms.

C is PSI / SI information carried in A, and its terminology may be changed.

That is, the above is summarized as follows.

A is a transport stream (TS)

B is a multiplex service

C is broadcast service information (PSI / SI)

However, even if the terms A, B, and C are changed, the basic concept of the present invention will not be changed.

1B is a diagram for explaining a relationship between a transport stream and a multicast service in a digital broadcasting system to which the present invention is applied. Reference numeral 180 is a transport stream, and it can be seen that the transport stream 180 carries a PSI / SI 180a and a plurality of broadcast services 180b and 180c. The broadcast services 1 and 2 180b and 180c are referred to as a multiplex service (multiplex) as shown by reference numeral 190.

1C to 1D illustrate definitions and relationships between a multiple broadcasting service, broadcast service information (PSI / SI), a transport stream, and an original network in a digital broadcasting system to which the present invention is applied.

1C and 1D are diagrams for explaining a current problem, FIG. 1C illustrates a problem that occurs when a transport stream ID is used to identify a transport stream, and FIG. 1D is a transport stream identifier. It illustrates a problem that occurs when (TransportStream ID) is used to identify a multiple broadcast service (multiplex). Using only the current identifier, it can be allocated as shown in FIG. 1C or 1D according to each interpretation. The problem is that in both cases, there is a problem in identifying each of the transport stream and the multicast service.

Here, network 1 110 is the first network that generates a multiple broadcast service, and network 2 150 is a delivery network that transmits a transport stream generated by network 1 110. The multiple broadcasting service described in the present invention may be a "multiplex" defined by a motion picture expert group (MPEG).

The transport stream 1 in the network 1 110 is composed of a multicast service generated by the multiplexer 114 and PSI / SI information according to the network 1, and the transport stream 2 in the network 2 150 is the same multicast service and a network. It consists of other PSI / SI information corresponding to 2 (150).

The multiplexer 114 receives and multiplexes DVB services from a broadcast service generator (not shown), and the broadcast service information generated by the PSI / SI generator 112 in consideration of each network characteristic to which a transport stream is transmitted ( PSI / SI) and a multiplexed multicast service are generated and output as a transport stream. That is, the multiplexer 114 transmits the Tx 116 of the network 1 110 including the PSI / SI necessary for the terminal belonging to the network 1 110 to receive the multi-cast service together with the multi-cast service 120. A transport stream including a PSI / SI required for transmitting a stream 1 118 and a terminal belonging to the network 2 150 together with the multicast service 120 to the Tx 152 of the network 2 150. Send 2 (154).

In the digital broadcasting system to which the present invention is applied as shown in FIGS. 1C and 1D, the multiplex service transmitted through the network 1 110 and the network 2 150 is the same, and the network 1 110 and the network 2 ( It is assumed that 150 is a different network. In the digital broadcasting system to which the present invention is applied, as shown in FIGS. 1C and 1D, the identifiers used to identify the multicast service and the transport stream are the same.

That is, a transport stream identifier (Transport_stream_id) and an original network identifier (Original_network_id) are used as an identifier for identifying a multicast service, and the transport stream identifier (Transport_stream_id) and the original network identifier (Original_network_id) are also used as identifiers for identifying a transport stream. Was used. However, referring to FIGS. 1C to 1D, it can be seen that the transport streams are different even though the multicast service is the same.

1C illustrates a case where a transport stream identifier is allocated to identify a multicast service.

Referring to FIG. 1C, it can be seen that the multicast service 120 transmitted to each of the network 1 110 and the network 2 150 is the same and only the PSI / SI information is different. In addition, the right side 160 to 164 of FIG. 1C illustrate identifiers included in the PSI / SI to distinguish the multicast service, and identifiers included in the PSI / SI to distinguish transport streams. It can be seen that 160, transport stream 1 162, and transport stream 2 164 all have the same transport stream identifier and original network identifier. That is, referring to reference numeral 160 in FIG. 1C, it can be seen that transport_stream_id = 1 and original_network_id = 1 are set to identify the multicast service. Referring to reference numeral 162 of FIG. 1C, it can be seen that transport_stream_id = 1 and original_network_id = 1 to identify transport stream 1. Referring to reference numeral 164, transport_stream_id = 1, to identify transport stream 2. You can see that original_network_id = 1.

In this case, there is a problem that it is difficult to distinguish the transport stream in the network 1 (110) and the transport stream in the network 2 (150).

As described above, a multiple broadcast service (Multiplex) and a transport stream carrying the same are identified by a transport stream identifier (Transport_stream_id) and an original network identifier (Original_network_id).

However, in FIG. 1C, the transport stream 1 118 and the transport stream 2 154 both assume that the multicast service is the same, and therefore the two transport streams will be distinguished by different PSI / SI information. In order to identify the same multicast service between two transport streams, the transport stream identifier and the original network identifier must be identical, and to identify different transport streams, the transport stream identifier and the original network identifier must be different from each other.

In the above description, the transport stream identifier is said to be unique within the original network identifier. The original network identifier indicates a network identifier of the network that created the multicast service.

That is, an original network generating a multicast service may transmit a unique transport stream identifier by assigning it to a transport stream transmitted to the original network or by transmitting it to a transport stream transmitted to another network.

 If the transport stream identifier is basically for identifying a transport stream, this means that within one original network, the transport stream identifier must be different for every transport stream transmitted. The transport stream identifier and the original network identifiers can then identify the transport stream as a whole and uniquely. In this way, two different transport streams TS1 and TS2 can be clearly distinguished in FIG. 1C.

That is, as described above, the original network in FIG. 1C is a network for generating the multiplex service, and the network is defined as a network for transmitting a transport stream.

In FIG. 1C, the multicast service 120 transmitted to the network 1 110 and the network 2 150 is the same. However, although network 1 110 and network 2 150 are different from each other, the identifiers of the multicast service and the transport stream can be seen to be the same.

That is, referring to FIG. 1C, a multiplex service (multiplex) may be identified by a transport stream identifier (transport_stream_id) and an original network identifier (original_network_id) as shown by reference numeral 160. Also, as shown by reference numerals 162 and 164, a transport stream is also a transport stream. It can be identified by the identifier and the original network identifier.

However, as shown in FIG. 1C, the multicast service is the same between the network 1 110 and the network 2 150, but the transport streams are different. The multicast service is the same, but when the transport stream is different, the transport stream identifier between the network 1 110 and the network 2 150 may be different or may be the same. The service was hard to identify.

Hereinafter, a case in which a transport stream identifier is allocated to identify a transport stream will be described with reference to FIG. 1D.

In FIG. 1D, as in FIG. 1C, the multicast service 172 transmitted through the transport stream 1 170 in the network 1 110 and the multicast service transmitted through the transport stream 2 176 in the network 2 150 ( 172 is assumed to be identical to each other. Broadcast service information (PSI / SI) 174 and 178 necessary for a terminal located in each network to receive a multicast service even if the multicast service 172 transmitted from the network 1 110 and the network 2 150 is the same. Is different for each network.

Reference numeral 180 denotes identifiers for identifying the multicast service 172 transmitted in the network 1 110 and the network 2 150. Referring to reference numeral 180, the transport stream identifier is determined to be 1 or 2 depending on whether the multicast service 172 is transmitted to the transport stream 1 170 or the transport stream 2 172, and the network in which the multicast service is generated is Since it is network 1 110, it can be seen that the original network identifier is determined as network 1.

Reference numeral 182 denotes identifiers for identifying the transport stream 1 (170). It can be seen that the transport stream identifier is set to 1 and the original network identifier is set to the network 1. Reference numeral 184 denotes identifiers for identifying transport stream 2 176, which indicates that the transport stream identifier is set to 2 and the original network identifier to network 1.

Although the transport stream identifier is set to 1 or 2 as shown by reference numeral 180 of FIG. 1D, it is difficult to identify the multicast service. This is because transport stream 1 170 and transport stream 2 176 carry the same multicast service.

As described above, referring to FIGS. 1C and 1D, it may be understood that a transport stream and a multicast service cannot be identified using a transport stream identifier and an original network identifier used in a digital broadcasting system to which the present invention is applied. Therefore, a new identifier for identifying a multicast service and a transport stream is needed.

Accordingly, in the embodiment of the present invention described below, the multicast service and the transport stream will be identified by the following two methods.

first :

Multiplex service (Multiplex): Identification using TS id, original network id

Transport Stream (TS): Identification using TS id, original network id, network id

second :

Multiplex Service (Multiplex): Identification using multiplex id and original network id

Transport stream (TS): identified using (multiplex id, original network id, network id) or (TS id, orinal network id)

DVB services are identified globally and uniquely by service identifier, original network identifier and transport stream identifier. The service identifier is a unique identifier at least within the multicast service. Thus, the same service in two different transport streams will have two different service identifiers even if they are exactly the same.

In the case of handover or roaming, unique identifiers for the multicast service and DVB service will help the terminal find the same multicast service or service in different networks. Therefore, multicast service and service identifier are very important.

As described above, since the Transport_Stream_id is unique to only one network, different Transport_Stream_ids may be allocated to the transport stream including the same multicast service in the network 1 110 and the network 150. As a result, the mobile station that has moved from the network 110 to the network 2 150 determines whether the same broadcast content is provided even though the transport stream providing the same broadcast content in the network 1 110 is provided in the network 2 150. There is a problem that can not be known.

Hereinafter, an embodiment for distinguishing a transport stream and an embodiment for distinguishing a multicast service will be described as examples of the first and second embodiments of the present invention, respectively.

The first embodiment uses a uniquely allocated transport stream ID and a network ID and an original network id in the original network to distinguish a multicast service and a transport stream. The second embodiment uses a multicast to distinguish a multicast service. Add a service identifier, and distinguish the multicast service by using the added multicast service identifier and the original network identifier, and the transport stream uses the multicast service identifier and the original network identifier, the network identifier, or the transport stream identifier and the original network identifier Use to distinguish.

First embodiment:

The first embodiment of the present invention clarifies the definition of the transport stream identifier and proposes to add a network identifier to identify the transport stream.

In the first embodiment of the present invention, the multiplexer 214 and the terminal identify the multiplex service by the transport stream identifier and the original network identifier, and the transport stream is identified by the transport stream identifier, the original network identifier, and the network identifier. To identify it. In addition, the first embodiment of the present invention further clarifies the definition of the transport stream identifier, and further uses the network identifier to identify the transport stream.

The transport stream identifier is uniquely assigned within the original network. The transport stream identifier is actually for identifying the service content, i.e., the multicast service, configured in the transport stream.

In this way, in the first embodiment of the present invention, the multicast service is identified using a transport stream identifier uniquely allocated in the original network and an original network identifier pair of the original network to which the transport stream is allocated. In addition, in order to identify a transport stream, a network identifier is required in addition to the transport stream identifier and the original network identifier.

By using the transport stream identifier and the original network identifier pair, the terminal can identify the multicast service carried by the transport stream. In addition, the network identifier may reflect in which network this transport stream is transmitted and in which network the PSI / SI information corresponds. Therefore, FIG. 1C may be modified as shown in FIG. 2, which is the first embodiment of the present invention.

2 is a diagram illustrating a concept for distinguishing a transport stream and a multicast service in a digital broadcasting system according to a first embodiment of the present invention.

Referring to FIG. 2, since a multiple broadcasting service (Multix) is generated in network 1 210, the original network becomes network 1 210.

In FIG. 2, the multiplexer 214 multiplexes DVB services received from a broadcast service generator (not shown), and generates PSI / SI information generated by the PSI / SI generator 212 into transport streams 218 and 254. To print to each network. The multiplexer 214 transmits the transport stream 1 218 including the PSI / SI information 215 corresponding to the network 1 210 and the multicast service 220 to the Tx 216, and transmits the network 2 ( The transport stream 2 254 including the PSI / SI information 255 corresponding to 250 and the multicast service 220 is transmitted to the Tx 252 so that the terminal may receive the broadcast service.

2, reference numerals 260 to 264 identify identifiers included in PSI / SI and transport streams in order for a terminal to distinguish a multiplex service and a transport stream according to the first embodiment of the present invention. The identifiers included in the PSI / SI are shown. The first embodiment of the present invention distinguishes both transport streams and multicast services, but mainly focuses on distinguishing multicast services. In FIG. 2, the identifiers 260, 262, and 264 are generated by the PSI / SI generator 212.

In transport stream 1 218, identifiers for identifying a multicast service, such as 260, and identifiers for identifying transport stream 1, such as 262, are included in the broadcast service information (PSI / SI) and transmitted. In transport stream 2 254, identifiers for identifying transport stream 2 such as reference numeral 260 and reference numeral 264 are included in the broadcast service information and transmitted.

Reference numeral 260 denotes identifiers for identifying a multicast service, and a transport stream identifier is set to 1 and an original network identifier is set to network 1. Reference numeral 262 denotes identifiers for identifying transport stream 1 transmitted in network 1, the transport stream identifier is set to 1, the original network identifier to network 1, and the network identifier to network 1. Reference numeral 264 denotes identifiers for identifying transport stream 2 transmitted in network 2. The transport stream identifier is set to 1, the original network identifier to network 1, and the network identifier to network 2.

In the second embodiment of the present invention, the above identifiers can uniquely identify the multicast service and the transport stream.

Reference numeral 260 denotes identifiers corresponding to a multicast service, and includes a transport stream identifier assigned by the original network 210 and an original network identifier, and the multicast service can be uniquely identified by using the two identifier pairs. . On the other hand, the reference numerals 262 and 264 are some of the identifiers included in the broadcast service information (PSI / SI) of the transport stream 1 218 and the transport stream 2 254, respectively, and are currently present in addition to the transport stream identifier and the original network identifier. It can be seen that it includes a network identifier that indicates the network carrying the transport stream. That is, referring to reference numeral 262, it can be seen that transport stream 1 is transmitted to network 1 210, so that the network identifier is 1. Looking at reference numeral 264, transport stream 2 is transmitted to network 2 250, so the network identifier is It can be seen that 2.

According to a first embodiment of the present invention, a multicast service is distinguished by an original network identifier and a transport stream identifier, and a transport stream is distinguished by an original network identifier, a transport stream identifier, and a network identifier.

When the same multicast service is transmitted in network 1 210 and network 2 250 as shown in FIG. 2, if the transport stream identifier and the original network identifier were used to identify the multicast service, the transport stream. By keeping the identifier and the original network identifier equal to, for example, Transport_stream_id = 1 and original_netwokr_id = 1, the UE can know that the same multicast service is being transmitted.

The transport stream identifier and the original network identifier in the transport stream may identify multiple broadcast services, which are DVB services carried in this transport stream. In addition, the network identifier is a network described in the PSI / SI information indicating the network to which this transport stream is being transmitted.

3 is a method flowchart of a multiplexer 214 for transmitting a multicast service according to a first embodiment of the present invention.

In operation 300, the multiplexer 214 receives a set of DVBs (a bundle of DVB services) from broadcast service generation units (not shown), and assigns a unique service identifier (Service_id) for each service in the multicast service in operation 302. do. In step 304, the DVB service multiplexing is performed, a unique transport stream identifier (transport_stream_id) for a transport stream carrying the multiplexed broadcast service is allocated, and in step 306, the transport stream identifier and the multiplex are used to identify the multicast service. An original network identifier (original network_id) indicating a network where a broadcast service is generated is inserted into broadcast service information as an identifier for identifying a multicast service.

In operation 308, the multiplexer 214 adds the transport stream identifier, the original network identifier, and a network identifier (networkt_id) indicating a network to which the transport stream is transmitted to identify the transport stream. In step 310, the transport stream including the multicast service and the broadcast service is transmitted.

4 is a method flowchart of a terminal for receiving a multicast service according to a first embodiment of the present invention.

4 is a flowchart illustrating a method for receiving a broadcast service by a terminal moving from network 1 to network 2. Referring to FIG.

In step 400, the terminal receiving the transport stream receives a transport stream that it wants to receive using the transport stream identifier, the original network identifier, and the network identifier. Here, the transport stream that the terminal wants to receive is a transport stream that transmits a multicast service received from a previous network before handover.

In step 402, the terminal parses a transport stream identifier and an original network identifier from a transport stream received in the handovered target network, and searches for the same multicasting service as the multicasting service received in the network before handover, and in step 404. Finds the same multicast service as the multicast service received in the network before the handover, and then selects a broadcast service having the same service identifier as the service identifier of the broadcast service provided in the previous network among the broadcast services in the same multicast service. Search.

Therefore, the terminal checks the transport stream identifier and the original network identifier pair to find the same multicasting service as the multicasting service provided in the previous network, and after finding the same multicasting service, the terminal identifies the same service identifier as the broadcast service provided in the previous network. Find a broadcast service with.

Second embodiment:

In the second embodiment of the present invention, a multicast service identifier (Multiplex_id) is proposed to identify a transport stream and a multicast service.

In a second embodiment of the present invention, a multicast service is identified using a multicast service identifier (multiplex_id) and an original network identifier (original_network_id). The transport stream is identified using a multicast service identifier, an original network identifier, a network identifier, or is identified using a transport stream and the original network identifier.

That is, in the second embodiment of the present invention, a multicast service identifier is proposed.

FIG. 5 is a diagram illustrating a concept for distinguishing multiplexing services in a digital broadcasting system according to a second embodiment of the present invention.

As described above, the original network identifier is a network identifier representing an original network, which is a DVB network generating a multicast service, and the multicast service identifier is uniquely assigned in the original network.

In the second embodiment of the present invention, the multicast service is identified by the multicast service identifier and the original network identifier pair proposed in the second embodiment. In addition, unlike the first embodiment, in the second embodiment of the present invention, a unique transport stream in the original network can be identified by using a multicast service identifier, an original network identifier, and a network identifier. In addition, in the second embodiment of the present invention, the transport stream may be identified using the original network identifier and the transport stream identifier.

Referring to FIG. 5, the multiplexer 504 receives DVB services, receives PSI / SI information for receiving a broadcast service provided from each network, from the PSI / SI generating unit 502, and transmits the transport stream 1 512. Transport stream 2 562 is generated and transmitted to Tx 510 of network 1 500 and Tx 560 of network 2 550, respectively.

In FIG. 5, it is assumed that the multicast service 506 included in the transport stream 1 512 and the transport stream 2 562 are identical to each other.

Reference numerals 580, 582, and 584 show identifiers included in PSI / SI for identifying a multicast service and a transport stream by a terminal handing over to a new network according to the second embodiment of the present invention. Shows identifiers for identifying the multicast service. Referring to reference numeral 580, it can be seen that the multicast service identifier is set to 1 and the original network identifier is set to network 1. Reference numeral 582 includes identifiers for identifying transport stream 1 transmitted in network 1, wherein the multicast service identifier is 1, the original network identifier is network 1, and the network identifier is network 1. Reference numeral 584 includes identifiers for identifying transport stream 2 transmitted in network 2. The multicast service identifier is set to 1, the original network identifier to network 1, and the network identifier to network 2.

By using the identifiers as shown in FIG. 5, it is possible to uniquely identify the multicast service and the transport stream.

In the second embodiment of the present invention, when identifying a transport stream, only a transport stream identifier and an original network identifier may be used. In this case, when the identifiers for transport stream 1 in network 1 are examined, the transport stream identifier is 1, the original network identifier is network 1, and when the identifier for transport stream 2 in network 2 is considered, the transport stream identifier is 2, The original network identifier is network 1.

Therefore, according to the second embodiment of the present invention, the transport stream may be identified using only the transport stream identifier and the original network identifier.

In FIG. 5, the broadcast service information including network information about the multicast service includes a multicast service identifier (Multiplex_id) and an original network identifier (original_network_id) uniquely allocated to the multicast service by the network 1 500 as shown by reference numeral 580. Broadcast service information is set to network 1).

The transport stream 1 512 is a multicast service identifier (Multipex_id) of the multicast service 506 transmitted through the transport stream 1, the original network identifier set to network 1, and the current transport stream 1 (512) as shown by reference number 582. The broadcast service information in which the network identifier (Network_id) indicating the network in which the) is being transmitted is set to network 1 is transmitted together. On the other hand, transport stream 2 562 can be seen that only the network identifier Network_id is different from transport stream 1 512 as shown by reference numeral 584. That is, since the original network identifier and the multicast service identifier coincide with the transport stream 1 512, and the network through which the transport stream 2 562 is transmitted is the network 2 550, the network identifier of the transport stream 2 562 is a network. You can see that it is set to 2.

As described above, the original network identifier refers to a network identifier of a DVB network that generates a multicast service. In addition, the multicast service identifier proposed in the second embodiment of the present invention is uniquely allocated in the original network identifier. In this manner, according to the second embodiment of the present invention, a multicast service may be identified by a multicast service identifier (Multiplex_id) and an original network identifier pair.

As shown in FIG. 5, in the second embodiment of the present invention, a multicast service is identified by an original network identifier and a multicast service identifier.

For example, when a multicast service with a multicast service identifier of 1 (multiplex_id = 1) and an original network identifier of 1 (original_network_id = 1) is transmitted in network 1 500 and network 2 550, network 1 Since the identifiers for the multicast service transmitted from 500 and the network 2 550 coincide, the terminal may know that the same multicast service is provided in the network 1 500 and the network 2 550.

The DVB service is further identified by a service identifier (Service_id) uniquely assigned to each service constituting the multicast service, a multicast service identifier (multiplex_id) uniquely assigned to each multicast service, and an original network identifier (original_network_id). Reasonable. This is because the service identifier is composed of a plurality of broadcast services and is unique within the multicast service generated in the original network.

Therefore, FIG. 1 may be modified to FIG. 5 according to the second embodiment of the present invention.

Referring to FIG. 5, since the multicast service is generated in the network 1 500, it is clear that the original network is the network 1 500, and the multicast service is uniquely identified by being assigned the multicast service identifier in the original network. will be. Whether the multicast service is transmitted in the original network or in another network, the terminal may identify the multicast service using a pair of the multicast service identifier (multiplex_id) and the original network identifier (original_network_id). When the terminal according to the second embodiment of the present invention receives a transport stream, the terminal may identify multiple broadcast services, which are DVB services transmitted through the transport stream, through a multicast service identifier and an original network identifier. In addition, the terminal may transmit the transport stream through a network identifier, and identify a network described by broadcast service information.

6 is a flowchart illustrating a multiplexer 504 for transmitting a multicast service according to a second embodiment of the present invention.

In step 600, the multiplexer 504 receives DVB services (DVB service set) from a broadcast service generation unit (not shown), assigns a unique service identifier for each service constituting a multicast service in step 602, and step 604. After multiplexing the service in, assigns a unique multicast service identifier for the multiplexed multicast service. In operation 606, the multiplexer 504 inserts a multicast service identifier and an original network identifier for identifying a multicast service into the broadcast service information. In operation 608, the multiplexer 504 inserts a multicast service identifier to identify a transport stream in the broadcast service information. After inserting the original network identifier and the network identifier, in step 610, the transport stream including the multicast service and broadcast broadcast information is transmitted. In operation 608, the multiplexer 504 may insert only the transport stream identifier (transport_stream_id) and the original network identifier (original_network_id) in place of the multicast service identifier, the original network identifier, and the network identifier to identify the transport stream in the broadcast service information.

7 is a flowchart illustrating an operation of a terminal for receiving a multicast service according to a second embodiment of the present invention. It is assumed that the terminal in FIG. 7 is performing handover from network 1 500 to network 2 550.

In step 700, the terminal receives a transport stream from the network, and in step 701, the terminal searches for a transport stream to be received according to the multicast service identifier inserted in the broadcast service information of the received transport stream and the original network identifier. On the other hand, if the multiplexer uses only the transport stream identifier and the original network identifier as identifiers for identifying the transport stream, in step 701, the UE determines the transport stream identifier and the original network identifier instead of the multicast identifier, the original network identifier, and the network identifier. Only the transport stream may be identified.

In step 702, the terminal searches for the same multicast service as the multicast service received from the previous network 1 500 according to the multicast service identifier and the original network identifier included in the received broadcast service information in the transport stream. In step 704, the same multicast service is found and the same service as the service provided in the network before the handover is searched through the service identifier in the multicast service.

8 is a block diagram of a terminal 800 according to an embodiment of the present invention.

Referring to FIG. 8, the terminal 800 according to an exemplary embodiment of the present invention uses a DVB-H receiver 802 for receiving a service or signaling through a broadcasting network, and an interactive network. An interactive adapter 810 for receiving a service or signaling, a mobility management unit (MM) 804 that handles and handles the movement and roaming process of the terminal 800, and manages rights acquisition and A subscription management unit 806 for tracking the acquired rights and controlling the decryption process of the service content, and a content consumption unit 808 for consuming the service received from the network.

The control block 804 identifies a transport stream and a multicast service according to an embodiment of the present invention. That is, according to the first embodiment of the present invention, the control block 804 parses a transport stream identifier and an original network identifier from broadcast service information of a transport stream received by the broadcast receiver 802, and parses the transport stream identifier and The original network identifier is used to check whether the same multicasting service as the previously provided multicasting service exists. If there is the same multi-broadcast service, after searching for the same service identifier as the service identifier previously provided in the multi-broadcast service, if there is a service having the same service identifier, the service provided from the network before the handover can be seamlessly provided. have.

In contrast, the control block 804 according to the second embodiment of the present invention receives a transport stream from the broadcast receiver 802 and parses a multicast service identifier and an original network identifier from broadcast service information of the received transport stream. The control block 804 searches for the same multicasting service as the multicasting service provided in the previous network by using the parsed multicasting service identifier and the original network identifier. A service having the same service identifier and service identifier is searched for in the multicast service. If the same service exists in the multicast service of the received transport stream, the control block 804 can provide the broadcast service to the user seamlessly even when performing a handover.

As described above, according to the present invention, it is possible to distinguish a transport stream and a multicast service in a digital broadcasting system.

Claims (16)

A method for a network to identify a broadcast service in a digital broadcasting system, Generating a multicast service by multiplexing the broadcast services; Generating broadcast service information (PSI / SI) including broadcast information on the multicast service; In the broadcast service information, a transport stream identifier (Transport_stream_id) indicating a transport stream for transmitting the multicast service to identify the multicast service, and an original network identifier (Original_network_id) indicating a network where the multicast service is generated. Process, Inserting the transport stream identifier (Transport_Stream_id) for identifying the transport stream, the original network identifier (Original_network_id), and a network identifier (Network_id) indicating a network to which the transport stream is to be transmitted to the broadcast service information; , And transmitting the broadcast service information and the multicast service in the transport stream. According to claim 1, When the network for transmitting the transport stream is different from the network for generating the multicast service, the network identifier is set to an identifier of the delivery network, unlike the original network identifier. . According to claim 1, And assigning a unique service identifier (Service_id) to each of the broadcast services by the network generating the broadcast service. A method for a terminal for identifying a broadcast service in a digital broadcasting system, Receiving a transport stream from a network and parsing broadcast service information (PSI / SI) of the transport stream; Searching for a transport stream to be received using a transport stream identifier (transport_stream_id) indicating the received transport stream included in the broadcast service information and an original network identifier (original_network_id) indicating a network where a multicast service is generated; When the transport stream to be received is found, the same multicasting service as the multicasting service provided before the handover using the transport stream identifier, the original network identifier, and a network identifier (network_id) indicating the network through which the transport stream is transmitted. Broadcast service identification method in a digital broadcasting system comprising the step of identifying a service. The method of claim 4, wherein And searching for the same multicasting service and receiving a service corresponding to the same service identifier as the service identifier of the service provided before the handover. A method for a network to identify a broadcast service in a digital broadcasting system, Generating a multicast service by multiplexing the broadcast services; Generating broadcast service information (PSI / SI) including broadcast information on the multicast service; A multicast service identifier (multiplex_id) indicating a multicast service transmitted through the transport stream to identify the multicast service in the broadcast service information, and an original network identifier (Original_network_id) indicating a network where the multicast service is generated. Inserting the process, Inserting into the broadcast service information the multicast service identifier (multiplex_id) for identifying the transport stream, the original network identifier (Original_network_id), and a network identifier (Network_id) indicating a network to which the transport stream is to be transmitted. and, And transmitting the broadcast service information and the multicast service in the transport stream. The method of claim 6, And assigning a unique service identifier (Service_id) to each of the broadcast services by the network generating the broadcast service. The method of claim 6, When the network for transmitting the transport stream is different from the network for generating the multicast service, the network identifier is set to an identifier of the delivery network, unlike the original network identifier. . A method for a terminal for identifying a broadcast service in a digital broadcasting system, Receiving a transport stream from a network and parsing broadcast service information (PSI / SI) of the transport stream; Searching for a transport stream to be received using a multiple broadcast service identifier (multiplex_id) and an original network identifier (original_network_id) included in the broadcast service information; When the transport stream to be received is found, the multicast service identifier included in the broadcast service information of the received transport stream and the same multicast service as the multicast service received before handover using the original network identifier and the network identifier may be used. Broadcast service identification method in a digital broadcasting system, characterized in that it comprises the step of identifying the broadcast service. The method of claim 9, And searching for the same multicasting service and receiving a service corresponding to the same service identifier as the service identifier of the service provided before the handover. A system for identifying a broadcast service by a network in a digital broadcasting system, A broadcast service information generation unit for generating broadcast service information (PSI / SI) including broadcast information on a multicast service; A broadcast stream is generated by multiplexing broadcast services, and a transport stream identifier (Transport_stream_id) indicating a transport stream for transmitting the multicast service to identify the multicast service in the broadcast service information, and the multicast service is generated. Insert an original network identifier (Original_network_id) indicating the network, the transport stream identifier (Transport_Stream_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and the transport stream is to be transmitted A multiplexer for inserting a network identifier (Network_id) indicating a network and carrying the broadcast service information and the multicast service on the transport stream; Receiving the transport stream, parsing the broadcast service information (PSI / SI) of the transport stream, generating a transport stream identifier (transport_stream_id) indicating the received transport stream included in the broadcast service information, and generating a multicast service. Search for a transport stream to be received using an original network identifier (original_network_id) representing a network. When the transport stream to be received is found, the transport stream identifier, the original network identifier, and a network to which the transport stream is transmitted are represented. And a terminal for identifying the same multicasting service as the multicasting service provided before the handover using a network identifier (network_id). The method of claim 11, wherein And a multiplexer assigns a unique service identifier (Service_id) to the broadcast services, respectively. The method of claim 12, The terminal, after finding the same multi-casting service, and receives a service corresponding to the same service identifier and the service identifier of the service provided before the handover, the broadcast service identification system in a digital broadcasting system. A system for identifying a broadcast service by a network in a digital broadcasting system, A broadcast service information (PSI / SI) generation unit for generating broadcast service information (PSI / SI) including broadcast information on a multicast service; A multiple broadcast service identifier (multiplex_id) indicating a multi broadcast service transmitted through the transport stream to multiplex broadcast services to generate a multi broadcast service, and identify the multi broadcast service in the broadcast service information, and the multi broadcast service Inserts an original network identifier (Original_network_id) indicating a generated network, the multicast service identifier (multiplex_id) for identifying the transport stream in the broadcast service information, the original network identifier (Original_network_id), and the transport stream A multiplexer for inserting a network identifier (Network_id) indicating a network to be transmitted, carrying the broadcast service information and the multicast service in the transport stream, and transmitting the multiplexer; The transport stream is received, the broadcast service information (PSI / SI) of the transport stream is parsed, and the transport stream to be received is searched using a multiple broadcast service identifier (multiplex and original network identifier) included in the broadcast service information. When the transport stream to be received is found, the multicast service received before handover using the multicast service identifier, the original network identifier, and the network identifier included in the broadcast service information of the received transport stream; Broadcast service identification system in a digital broadcasting system, characterized in that it comprises a terminal for identifying the same multi-casting service. The method of claim 14, And a multiplexer assigns a unique service identifier (Service_id) to the broadcast services, respectively. The method of claim 15, The terminal, after finding the same multi-casting service, and receives a service corresponding to the same service identifier and the service identifier of the service provided before the handover, the broadcast service identification system in a digital broadcasting system.

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