KR101439922B1 - Method and System for providing Broadcasting service in case of handoff of communication terminal - Google Patents

Abstract

There is provided a method of providing a broadcast service in a handoff from a first base station to a second base station, the communication terminal being provided with a broadcast service of a first channel, the method comprising: when a broadcast service registration message is received from the communication terminal in the second base station, The method comprising: transmitting a broadcast service request message to the base station controller; receiving a broadcast service request message from the base station controller; extracting a neighbor list of the second base station; Determining whether the base station is providing the broadcast service of the first channel, and if the base station controller has the base station adjacent to the second base station that does not provide the broadcast service of the first channel, The second base station and all of the base stations adjacent to the second base station, The communication terminal establishes a connection for a broadcast service by transmitting a broadcast service setup request message to the station, and transmits a broadcast to a new base station as well as a neighboring base station whenever a communication terminal receiving the broadcast service moves to a new base station. It is possible to reduce the number of cases in which no reception is made.

Handoff, neighboring base station, Naver list, broadcasting

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a broadcast service providing method and system for handoff of a communication terminal,

When a communication terminal moves to a new base station, it determines whether the corresponding base station is providing a corresponding broadcast service, and provides the broadcast service And to provide a broadcasting service for a handoff of a communication terminal that enables the corresponding base station to provide the corresponding broadcasting service.

A system typically representing a wireless communication system is a mobile communication system. Such a mobile communication system has been developed to provide a voice service to a user's location without restriction. However, the mobile communication system is currently being developed to provide various types of services. One of technologies actively standardizing in the 3GPP2 and 3GPP campuses in such a mobile communication system is a broadcasting service.

The broadcasting service in the mobile communication network provides a broadcasting service regardless of the number of customers while minimizing the network resources required in the broadcasting service by setting a channel for a separate broadcasting service. The BCMCS (Broadcast / Multicast Service) A broadcast service, and a broadcast service of an MBMS (Multimedia Broadcast Multicast Service).

Hereinafter, BCMCS will be described.

BCMCS (Broadcast / Multicast Service) is a service that provides the same information (multimedia including streaming video, streaming audio, text message, etc.) to a plurality of users through one link. In BCMCS, Service.

Also, according to the characteristics of the mobile communication network, BCMCS can broadcast simultaneously with the same contents with each base station, and each base station can broadcast different contents according to a specific environment and setting of each region.

A general mobile broadcasting system transmits a broadcast to an entire area without confirming the presence or absence of a communication terminal receiving a broadcast in an arbitrary area. However, in a mobile communication network such as BCMCS, a terminal can notify the existence of a terminal to a base station by using a reverse channel. Therefore, a method may be used in which a broadcast is transmitted only when a terminal receiving the broadcast exists, . Such a transmission scheme is referred to as dynamic broadcast.

If the dynamic transmission scheme is applied to a single base station, the communication terminal requests a broadcasting service of the corresponding channel to the moving base station whenever it moves to the new base station, and receives the broadcasting service.

However, in the conventional case as described above, there is a disadvantage in that it is impossible to receive data during a period of setting a path by requesting a service to notify that the communication terminal has moved to a new base station and to receive a broadcasting service again.

It is an object of the present invention to provide a method and system for providing a broadcast service in a handoff of a communication terminal that can reduce a case where a communication terminal transmits a broadcast to not only a base station but also an adjacent base station when the communication terminal moves to a new base station have.

It is another object of the present invention to provide a method and system for providing a broadcast service in a handoff of a communication terminal capable of providing a high quality broadcast service to a communication terminal by transmitting a broadcast according to a movement path of the communication terminal.

According to an aspect of the present invention, there is provided a communication system including a communication terminal for receiving a broadcast service, a base station for providing a broadcast service to the communication terminal, a base station controller, A method for providing a broadcast service in a handoff from a first base station to a second base station in a communication terminal provided with a broadcasting service of a first channel in a mobile communication system including a server and a broadcasting service controller, The base station controller transmits a broadcast service request message to the base station controller, and when a broadcast service request message is received from the base station controller, extracts a neighbor list of the second base station, And the second base station Determining whether each of the neighboring base stations provides the broadcast service of the first channel; if the neighboring base station exists in the neighboring base station that does not provide the broadcast service of the first channel in the base station controller, And establishes a connection for a broadcast service by transmitting a broadcast service setup request message to each of the second base stations adjacent to the private second base station not providing the broadcast service and the second base station. Method is provided.

The broadcast service registration message includes first channel information, second base station identification information, and communication terminal identification information, and the broadcast service request message includes second base station identification information and first channel information.

The base station controller transmits a broadcast service setup request message to the second base station to establish a connection if there is no neighbor base station that does not provide the broadcast service of the first channel.

Upon receiving the broadcast service setup request message, the neighbor base station and the second base station provide a broadcast service of the first channel transmitted from the broadcast content server through the established connection.

According to another aspect of the present invention, there is provided a communication system including a communication terminal for receiving a broadcast service, a base station for providing a broadcast service to the communication terminal, a base station controller, a broadcast content server connected through a data service node connected to the base station controller, A method for providing a broadcast service in a handoff from a first base station to a second base station in a communication terminal provided with a broadcast service of a first channel in a mobile communication system including a mobile station, The second base station determines whether to provide the first channel broadcasting service. If it is determined that the first channel broadcasting service is not provided, the base station generates a broadcasting service registration message and transmits the message to the second base station. When the service registration message is received, And transmits the request message to the base station controller. When the broadcast service request message is received from the base station controller, a neighbor list of the second base station is extracted, and whether each neighboring base station included in the extracted neighbor list provides a broadcast service of the first channel If the neighbor BS does not provide the broadcast service of the first channel as a result of the determination in the base station controller, the neighbor BS that does not provide the broadcast service of the first channel and the broadcast service setup request message And establishes a connection for a broadcast service. The method for providing a broadcast service in a handoff of a communication terminal is provided.

The communication terminal determines whether to provide the first channel broadcasting service by the second base station using the broadcast overhead message transmitted from the second base station.

The broadcast overhead message includes channel information broadcasted from the corresponding base station.

The communication terminal receives the broadcasting service of the first channel when the second base station determines that the broadcasting service of the first channel is provided.

According to another aspect of the present invention, there is provided a base station controller for providing a broadcast service in a handoff of a communication terminal in a mobile communication system for providing a broadcast service, the base station controller including a communication unit for communication with each base station, A database for storing list information and broadcast information for each base station; a Naver list extracting unit for searching for and extracting a Naver list corresponding to the BS identification information included in the message, when receiving a broadcast service request message from the BS; A broadcasting-status determination unit for determining whether each neighboring base station included in the neighbor list extracted by the extraction unit provides a broadcast service of a channel included in the broadcast service request message; and a broadcast- Once received, The base station controller characterized in that it comprises transmission to the broadcast service configuration request message to the base station unit that broadcasts the broadcast service is set such that connection establishment for receiving a service request is provided.

The database includes a Naver list information database in which neighbor list information for each base station is stored, and a broadcast information database for each base station in which channel information about broadcasts serviced by the base stations is stored.

The broadcast service setup request message generation command includes base station identification information that does not provide a broadcast service of the corresponding channel.

If the broadcast service is not provided, the broadcast status determination unit searches the broadcast information database of each base station for each adjacent base station extracted by the neighbor list extraction unit, And transmits the generated command to the broadcast service setting request unit.

According to another aspect of the present invention, there is provided a mobile communication system for providing a broadcast service from a broadcast content server through a broadcast content server for providing a broadcast service, a broadcast service controller connected to the broadcast content server, and a data service node , Measures the pilot signal strength while receiving the broadcast service of the first channel and handoffs from the first base station to the second base station, and transmits the broadcast overhead message to the second base station using the broadcast overhead message transmitted from the second base station A communication terminal for generating a broadcast service registration message according to a result of the determination, and a base station for generating a broadcast service request message when a broadcast service registration message is received from the communication terminal, When the request message is received, And determines whether or not to provide a first channel broadcast service to each of the base stations adjacent to the second base station included in the extracted neighbor list, And a base station controller for establishing a connection for a broadcast service by transmitting a broadcast service setup request message to each of the base stations adjacent to the second base station not providing the service and the second base station, A broadcast service providing system is provided.

The communication terminal generates a broadcast service registration message if the first channel information is not included in the broadcast overhead message, and receives a broadcast service of the first channel if the first channel information is included in the broadcast overhead message.

In addition, the communication terminal receives the broadcast service of the first channel from the second base station through the connection established under the control of the base station controller.

The base station transmits a broadcast overhead message including the base station identification information and the channel information providing the current broadcast service to the communication terminal.

The base station controller includes a database in which neighbor list information for each base station and broadcast information for each base station is stored. The base station controller searches the database to extract a neighbor list, and for each neighbor base station included in the extracted neighbor list, It is determined whether or not the channel broadcasting service is provided.

The base station provides a broadcast service corresponding to the channel information included in the message when the broadcast message registration message is received.

As described above, according to the present invention, whenever a communication terminal receiving a broadcast service moves to a new base station, the communication terminal transmits not only a new base station but also a neighboring base station, A method and system for providing a broadcast service in a handoff of the mobile terminal.

In addition, it is possible to provide a method and system for providing a broadcast service in a handoff of a communication terminal that provides a broadcast service of high quality to a communication terminal because broadcasting is transmitted in advance according to the movement path of the communication terminal.

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

1 is a conceptual diagram for explaining a method of providing a broadcast service in a handoff of a communication terminal according to the present invention.

1, there is a communication terminal for receiving a broadcast in the first base station area and provides a broadcasting service based on BCMCS. In the second to seventh base station areas, there is no communication terminal for receiving broadcasting, .

At this time, if the communication terminal performs a handover from the first base station area to the second base station area, the communication terminal transmits a broadcast service registration message for requesting a broadcast service to the second base station.

Then, the second base station transmits a broadcast service request message to the base station controller, and the base station controller can start broadcast transmission to both the second base station and neighboring base stations of the second base station.

When a communication terminal receiving a broadcasting service moves to a new base station as described above, if a broadcast is transmitted not only to a new base station but also to an adjacent base station, broadcasting is transmitted in advance according to the movement path of the communication terminal. It is less likely to receive data than a new transmission.

2 is a diagram illustrating a system for providing a broadcast service in a handoff of a communication terminal according to the present invention.

2, a broadcasting service providing system using a Naver list includes base stations 210a and 210b for wireless communication with a communication terminal 200 to provide a mobile communication service, a wireless link and a wired link for the base stations 210a and 210b, A base station controller 220 for controlling a handoff for maintaining the continuity of a call while the user of the communication terminal 200 is in motion, a base station controller 220 connected to the base station controller 220, A base station management (BSM) server 230, a data service node 240, a BCMCS controller 250, and a broadcast content management server 250, which perform the operation and maintenance functions of the base station controller 220, And a server (BCMCS contents server) 260.

The communication terminal 200 is a terminal receiving a broadcast overhead message transmitted via a wireless communication network and receiving a broadcast / multicast service.

The broadcast overhead message includes broadcast data rate and amount, broadcast time, broadcast physical channel information, and the like.

Also, the communication terminal 200 performs handoff by measuring the pilot signal strength transmitted from each of the base stations 210a and 210b.

If the communication terminal 200 handoffs from the source base station 210a to the target base station 210b in the case where the communication terminal 200 is a terminal receiving a broadcasting service, The target base station 210b determines whether a broadcast service of the corresponding channel is provided using the broadcast overhead message received from the target base station 210b.

If it is determined that the target BS 210b does not provide the broadcast service of the corresponding channel, the communication terminal 200 transmits a broadcast service registration message including the channel information of the broadcast service to the target BS 210b send.

The base stations 210a and 210b are arranged on a cell-by-cell basis and perform baseband signal processing, wired / wireless conversion, and transmission / reception of radio signals.

In addition, the BSs 210a and 210b activate a broadcasting service of a corresponding channel for a cell or a sector for which the communication terminal 200 transmits a broadcast service registration message.

That is, when receiving a broadcast service registration message including broadcast channel information from the communication terminal 200, the base stations 210a and 210b determine that there is a communication terminal 200 receiving a broadcast in its own area, And the like.

The base stations 210a and 210b may be named differently depending on the type of network, such as a base transceiver station (BTS) for a second-generation network and a node B for a third-generation network.

The base station controller 220 controls and manages the base stations 210a and 210b and allocates and releases radio channels for the communication terminals 200 and transmission power control of the communication terminals 200 and the base stations 210a and 210b, Cell handoff, transcoding and vocoding, and operation and maintenance of the base stations 210a and 210b.

In addition, when the BSC 220 receives a broadcast service request message including channel information from the BSs 210a and 210b, the BSC 220 checks a neighbor list of the BSs 210a and 210b, It is determined whether or not a broadcasting service corresponding to channel information in the broadcast service request message is provided to each neighboring base station.

If it is determined that there is a neighboring base station that does not provide the broadcast service corresponding to the channel information, the base station controller 220 requests the neighboring base station that does not provide the broadcast service corresponding to the channel information Thereby providing a broadcasting service.

The base station controller 220 performing the above-mentioned functions may be named differently depending on the type of the network, such as a base station controller (BSC) for a second-generation network and an RNC (Radio Network Controller) for a third- 3, which will be described in detail.

The base station management server 230 manages system parameters of the base stations 210a and 210b and the base station controller 220 and periodically measures the operating states of the base stations 210a and 210b and the base station controller 220 And so on.

The base station management server 230 transmits the broadcast scheduling information and the broadcast start message to the base station controller 220 and the base stations 210a and 210b when the broadcast scheduling information and the broadcast start message are received from the broadcast service controller 250. [ 210b.

The data service node 240 supports an Internet protocol for supporting broadcast / multicast service and transmits / receives a broadcast / multicast message.

For example, the data service node 240 includes an Interworking Function (IWF) for a second-generation network, a Packet Data Service Node (PDSN) and a Packet Data Gateway Node, and a Serving GPRS Support Node (SGSN) and a Gateway GPRS Support Node (GGSN) in the case of a WCDMA network and an HSDPA network.

The broadcast service controller 250 transmits the broadcast scheduling information to each of the base station management servers 230 and transmits a broadcast start message to the base station management server 230 before a broadcast start time. The path between the data service node 240, the base station controller 220, and the base stations 210a and 210b for the broadcast service is set by the broadcast start message.

The broadcast content server 260 receives broadcast requests from the broadcast service controller 250 at a time of broadcasting and transmits broadcast data to a plurality of data service nodes 240.

Through this process, subscribers can provide services at the time they need information.

In addition, the broadcast content server 260 finally converts the broadcast data into an IP-based multicast stream, and transmits the IP-based multicast stream to the data service node 240 using a multicast transmission scheme. The multicast transmission scheme is a transmission scheme in which one stream is simultaneously served to a plurality of clients, and is a data transmission scheme suitable for a broadcasting service that can reduce the server I / O and network bandwidth.

3 is a block diagram schematically illustrating the configuration of a base station controller for providing a broadcast service in handoff of a communication terminal according to the present invention.

3, a base station controller for providing a broadcast service in a handoff of a communication terminal includes a communication unit 300 for communication with a base station and a data service node, a database 310 in which neighbor list information and broadcast information for each base station is stored, A Naver list extraction unit 320, a broadcast status determination unit 330, and a broadcast service setup request unit 340.

The database 310 includes a neighbor list information database 312 in which neighbor list information for each base station is stored, and a broadcast information database 314 for each base station in which channel information about broadcasts serviced by the base stations is stored.

When receiving the broadcast service request message from the base station, the Naver list extractor 320 extracts a Naver list corresponding to the BS identification information included in the message using the Naver list information database 312.

The broadcast service request message includes corresponding base station identification information, broadcast channel information to be received by the communication terminal, and the like.

That is, the neighbor list extractor 320 extracts the base station identification information from the broadcast service request message, and extracts a neighbor list corresponding to the extracted base station identification information from the neighbor list information database 312.

The broadcast status determination unit 330 may determine whether or not the broadcasting service request message included in the broadcast service request message is broadcast to each neighboring base station included in the neighbor list extracted by the neighbor list extraction unit 320, It is determined whether a broadcast service corresponding to the channel information is provided.

That is, the broadcasting-status determination unit 330 determines whether the broadcast service of the corresponding channel is available for each neighboring base station included in the neighbor list extracted by the neighbor list extraction unit 320, using the broadcast- Is provided.

If it is determined that there is a neighboring BS that is not provided with the broadcast service corresponding to the channel information, the broadcast determination unit 330 may issue a broadcast service setup request message To the broadcast service setting requesting unit 340. The broadcast service setup request message generation command includes base station identification information that does not provide a broadcast service corresponding to the channel information.

Upon receiving a broadcast service setup request message generation command from the broadcast status determination unit 330, the broadcast service setup request unit 340 transmits a broadcast service setup request message to the corresponding base station and establishes a connection .

The broadcast service setup request message includes base station identification information, and may be a message for requesting the establishment of a traffic channel for providing a broadcast service.

4 is a flowchart illustrating a method of providing a broadcast service according to handoff of a communication terminal according to the present invention.

4, the communication terminal measures the strength of the pilot signal transmitted from the base station while receiving the broadcasting service of the first channel (S400). If the measured strength of the pilot signal is equal to or greater than a predetermined handoff threshold (S402).

The communication terminal guarantees mobility by providing a handoff function to continuously receive the broadcast service of the first channel even when the communication terminal moves out of the service area of the source base station and enters the service area of the target base station.

That is, the communication terminal measures a strength of a pilot signal transmitted from the base station, performs a handoff if the measured strength of the pilot signal is greater than or equal to a predetermined threshold, and does not perform a handoff if the strength of the pilot signal is not less than a threshold.

If it is determined in step 402 that the strength of the measured pilot signal is greater than or equal to the handoff threshold, the communication terminal receives a broadcast overhead message from the target base station while handing off the target base station in step S404. The broadcast overhead message includes a broadcast data rate and amount, a broadcast time, broadcast physical channel information provided by a base station, and the like.

In step S406, the communication terminal determines whether the target base station provides the broadcast service of the first channel using the broadcast overhead message received in step S404. That is, the communication terminal determines whether the broadcast service of the first channel is provided by using whether the first channel information is included in the broadcast overhead message.

If it is determined in step 406 that the target base station provides the broadcast service of the first channel, the communication terminal receives the broadcast service of the corresponding channel (S408).

If it is determined in step 406 that the target base station is not providing the broadcast service of the first channel, the communication terminal transmits a broadcast service registration message for requesting the broadcast service of the first channel to the target base station (S410) .

The broadcast service registration message includes communication terminal identification information, target base station identification information, broadcast channel information to be viewed by the communication terminal (i.e., first channel information), and the like.

When the step 410 is performed, the target base station transmits a broadcast service request message to the base station controller (S412). The broadcast service request message includes broadcast channel information (i.e., first channel information) and target base station identification information.

If the step 412 is performed, the base station controller extracts the target base station identification information from the broadcast service request message and extracts a neighbor list corresponding to the target base station identification information using the database (S414).

That is, the base station controller extracts the target base station identification information from the broadcast service request message, and extracts the neighbor list corresponding to the extracted target base station identification information using the neighbor list information database.

After performing step 414, the base station controller determines whether each neighbor base station included in the extracted neighbor list provides a broadcast service of the first channel (S416).

That is, the base station controller confirms whether each neighboring base station provides a broadcast service of the first channel to each neighboring base station included in the extracted neighbor list, using the broadcast information database for each base station.

After performing step 416, if there is a neighboring base station that does not provide the broadcast service of the first channel among the neighboring base stations (step S418), the base station controller determines whether a neighboring base station that does not provide the broadcast service of the first channel and the target base station And transmits a broadcast service setup request message (S420).

The broadcast service setup request message is a message requesting a traffic channel setup (connection setup) for providing a broadcast service, and includes base station identification information and broadcast channel information that do not provide a broadcast service of the first channel.

Each base station that receives the broadcast service setup request message from the base station controller sets up a connection (path) for providing a broadcast service.

Then, each base station provides the broadcast service of the first channel through the established connection (path).

If it is determined in step 418 that there is no base station that does not provide the broadcast service of the first channel, the base station controller transmits a broadcast service setup request message only to the target base station (step S422).

Then, the target BS establishes a connection (path) for providing a broadcast service according to the broadcast service setup request message (S424), and provides a broadcast service of the first channel through the established connection (path) ).

As described above, whenever a communication terminal receiving a broadcasting service moves to a new base station, broadcasting is transmitted not only to a new base station but also to a neighbor base station. Therefore, broadcasting is transmitted according to a moving path of the communication terminal, It is less likely to receive data than a new transmission.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

As described above, the method and system for providing a broadcast service in the handoff of the communication terminal according to the present invention can be used for a technique of providing a broadcasting service to a communication terminal.

1 is a conceptual diagram illustrating a method of providing a broadcast service in a handoff of a communication terminal according to the present invention;

2 is a diagram illustrating a system for providing a broadcast service in a handoff of a communication terminal according to the present invention.

3 is a block diagram schematically illustrating a configuration of a base station controller for providing a broadcast service in a handoff of a communication terminal according to the present invention.

4 is a flowchart illustrating a method of providing a broadcast service according to handoff of a communication terminal according to the present invention.

Description of the Related Art

200: communication terminal 210: base station

220: base station controller 230: base station management server

240: Data service node 250: Broadcast service controller

260: Broadcast content server 300:

310: Database 320: Naver list extraction unit

330: Broadcasting status determination unit 340: Broadcast service setting request unit

Claims (19)

1. A mobile communication system including a communication terminal provided with a broadcasting service, a base station for providing a broadcasting service to the communication terminal, a base station controller, a broadcasting contents server connected through a data service node connected to the base station controller, A method of providing a broadcast service in a handoff from a first base station to a second base station, the communication terminal being provided with a broadcast service of a channel, Transmitting a broadcast service request message to the base station controller when the broadcast service registration message is received from the communication terminal at the second base station; When the broadcast service request message is received from the base station controller, a neighbor list of the second base station is extracted, and each base station adjacent to the second base station included in the extracted neighbor list provides a broadcast service of the first channel ; And If the second base station that does not provide the broadcast service of the first channel exists in each of the neighboring base stations in the base station controller and the second base station that does not provide the broadcast service of the first channel, A step of establishing a connection for a broadcast service by transmitting a broadcast service setup request message to a base station The method of claim 1, further comprising the steps of: The method according to claim 1, Wherein the broadcast service registration message includes first channel information, second base station identification information, and communication terminal identification information. The method according to claim 1, Wherein the broadcast service request message includes second base station identification information and first channel information. The method according to claim 1, Further comprising the step of transmitting a broadcast service setup request message to the second base station to establish a connection if the neighbor base station that does not provide the broadcast service of the first channel does not exist, The method comprising the steps of: The method according to claim 1, Wherein the neighbor base station and the second base station, which have received the broadcast service setup request message, further provide a broadcast service of the first channel transmitted from the broadcast content server through the established connection. Off broadcasting service. 1. A mobile communication system including a communication terminal provided with a broadcasting service, a base station for providing a broadcasting service to the communication terminal, a base station controller, a broadcasting contents server connected through a data service node connected to the base station controller, A method of providing a broadcast service in a handoff from a first base station to a second base station, the communication terminal being provided with a broadcast service of a channel, The communication terminal determines whether or not the first channel broadcasting service is provided by the second base station at the time of handoff to the second base station, and if the first channel broadcasting service is not provided as a result of the determination, the communication terminal generates a broadcasting service registration message To the second base station; Transmitting a broadcast service request message to the base station controller when the broadcast service registration message is received from the second base station; Extracting a neighbor list of the second base station when the broadcast service request message is received from the base station controller and determining whether each neighbor base station included in the extracted neighbor list provides a broadcast service of the first channel; If it is determined that the neighbor BS does not provide the broadcast service of the first channel, the BS controller transmits a broadcast service setup request message to the neighbor BS and the second BS that have not provided the broadcast service of the first channel Establishing a connection for the broadcast service The method of claim 1, further comprising the steps of: The method according to claim 6, Wherein the communication terminal determines whether to provide a first channel broadcast service by the second base station using the broadcast overhead message transmitted from the second base station. 8. The method of claim 7, Wherein the broadcast overhead message includes channel information broadcasted from a corresponding base station. The method according to claim 6, Wherein the communication terminal is provided with a broadcasting service of the first channel when it is determined that the second base station provides the broadcasting service of the first channel. A base station controller for providing a broadcast service in a handoff of a communication terminal in a mobile communication system providing a broadcast service, A communication unit for communication with each base station; A database storing Naver list information and broadcasting information for each base station for each base station; A Naver list extracting unit for searching for and extracting a Naver list corresponding to the BS identification information included in the message, when receiving a broadcast service request message from the BS; A broadcast-status determiner for determining whether each neighboring base station included in the neighbor list extracted by the neighbor list extractor provides a broadcast service of a channel included in the broadcast service request message; A broadcast service setup request message for requesting a broadcast service setup request message to the corresponding base station to establish a connection for receiving a corresponding broadcast service, And a base station controller. 11. The method of claim 10, Wherein the database includes a neighbor list information database storing neighbor list information for each base station, and a broadcast information database for each base station in which channel information about broadcasts serviced by the base stations is stored. 11. The method of claim 10, Wherein the broadcast service setup request message generation command includes base station identification information that does not provide a broadcast service of a corresponding channel. 11. The method of claim 10, If the broadcast service is not provided, the broadcast status determination unit searches the broadcast information database of each base station for each adjacent base station extracted by the neighbor list extraction unit, And transmits the generated command to the broadcast service setting requesting unit. 1. A system for providing a broadcast service from a broadcast content server through a broadcast content server providing a broadcast service, a broadcast service controller connected to the broadcast content server, and a data service node, Wherein the mobile station measures a pilot signal strength and handoffs from the first base station to the second base station upon receiving the broadcast service of the first channel, A communication terminal for determining whether to provide a channel broadcasting service and generating a broadcasting service registration message according to the determination result; A base station for generating a broadcast service request message when a broadcast service registration message is received from the communication terminal; And transmitting a first channel broadcast service to each of the base stations adjacent to the second base station included in the extracted neighbor list if the broadcast service request message is received from the base station, extracting a neighbor list for the second base station included in the message, And a base station controller for determining whether to provide a broadcast service by transmitting a broadcast service setup request message to each of the base stations adjacent to the second base station that does not provide the broadcast service of the first channel and the second base station, And transmitting the handoff request message to the communication terminal. 15. The method of claim 14, Wherein the communication terminal generates a broadcast service registration message if the first channel information is not included in the broadcast overhead message and receives a broadcast service of the first channel if the first channel information is included in the broadcast overhead message, Off-time broadcast service providing system. 15. The method of claim 14, Wherein the communication terminal receives the broadcast service of the first channel from the second base station through the connection established under the control of the base station controller. 15. The method of claim 14, Wherein the base station transmits a broadcast overhead message including base station identification information and channel information providing a current broadcast service to the communication terminal. 15. The method of claim 14, The base station controller includes a database in which neighbor list information for each base station and broadcast information for each base station is stored. The base station controller searches the database to extract a neighbor list, and for each neighbor base station included in the extracted neighbor list, And determining whether or not to provide the channel broadcast service. 15. The method of claim 14, Wherein the base station provides a broadcast service corresponding to the channel information included in the message when the broadcast message registration message is received.

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