Abstract: An apparatus and method for continuously providing a selected service being watched when a user moves out of a cell or network in a Digital Video Broadcasting-Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system. Information required for a handover is provided to a terminal using an interactive channel. The handover for the terminal can be performed using a conventional scheme and an enhanced scheme even when the user moves to a new cell while watching the selected service. As the enhanced handover scheme is provided, the user can receive a seamless service. In a mobile environment, a handover scenario for the terminal can be efficiently provided.

Abstract: A system and method for transmitting broadcast service data in a digital broadcasting system. The method includes setting a flag indicating a service area representative of coverage where broadcast service data is provided, for each broadcast service; and transmitting broadcast service information including the flag and a Transport Stream (TS) including the broadcast service data.

Abstract: A method for transmitting an Electronic Service Guide (ESG) in a Convergence of Broadcasting and Mobile Service (CBMS) system is provided. A delivery path of ESG data is parsed. A first information element indicating transmission of a broadcast ESG when the ESG data can be delivered over a broadcast network is set. A second information element indicating transmission of a Point-to-Point (PTP) ESG for a terminal or a terminal group when the ESG data can be delivered over an interactive network in a PTP bearer is set. ESG delivery information is transmitted including at least one of the first and second information elements, to at least one terminal over at least one ESG bootstrap session for carrying information necessary for transmission of the ESG data. The broadcast ESG and the PTP ESG are transmitted to the at least one terminal over at least one delivery path out of the broadcast network and the interactive network.

Abstract: Provided is a method and apparatus for transmitting/receiving a service in a digital broadcasting system. When a user desires to continue receiving a service in an Internet Protocol (IP) platform other than an IP platform to which the user belongs, a network provides service mapping information to a terminal. Thus, even when the user moves to another IP platform while viewing a user-selected service, the terminal can continue receiving the service.

Abstract: Provided are a method and apparatus for indicating service variation in a Convergence of Broadcasting and Mobile Service (CBMS) system. A network entity aggregates information about a first service that can be provided by a current network and information about a second service of associated another network in order to generate service variation information indicating whether at least one of a language, a subtitle, and a camera angle of the second service is changed when compared to the first service, and transmits the service variation information to a terminal in the current network over a broadcasting network or an interactive network. The terminal can determine whether to receive the second service continuously from the first service from the other network using the service variation information.

Abstract: Provided is a method and apparatus for estimating a signal quality bitmap for cells. Maps for a popular frequency are assumed as a benchmark bitmap and maps for other frequencies are constructed based on the benchmark bitmap, thereby remarkably reducing cost imposed by map generation and broadcasting.

Abstract: A method for providing a broadcast service to a terminal by a network in a Digital Video Broadcasting-Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system. The method includes generating Program Specific Information/Service Information (PSI/SI) indicative of information related to a broadcast service requested by the terminal; generating mapping information for information on the broadcast service in an Internet Protocol (IP) platform from which the terminal is currently receiving the broadcast service, and for information on a broadcast service corresponding to the broadcast service in IP platforms other than the IP platform; and including the generated mapping information in an IP/Medium Access Control (MAC) Information Notification Table (INT) of the PSI/SI, and delivering the INT to the terminal.

Abstract: A method and apparatus for transmitting and receiving an Electronic Service Guide (ESG) for roaming users in a Convergence of Broadcasting and Mobile Service (CBMS) system. A network entity generates a normal ESG indicating services available for local users in a network, and a special ESG indicating services available for roaming users in the network, the roaming users entering into the network from a neighboring network of the network, and transmits over at least one of an interactive network and a broadcast network the normal ESG and the special ESG to a terminal in the network. The terminal, or a roaming user, in the network receives the normal ESG and the special ESG, and performs a user roaming procedure or a service roaming procedure based on the special ESG.

Abstract: Disclosed is a DVB-H CBMS system by which a user can continue to view a program being in service even when the transport stream or IP platform changes while the user views the program. In the DVB-H CBMS system, the system transmits service mapping information according to transport streams or IP platforms to the terminal, so that the system can provide a service without interruption to the terminal even when a user of the terminal moves out of a current cell or network into a new cell or network while receiving a service that the user selected.

Abstract: Disclosed is a system and method for transmitting/receiving an encrypted Electronic Service Guide (ESG) in a mobile Digital Video Broadcasting-Handheld (DVB-H) Convergence of Broadcast and Mobile Service (CBMS) system. When a terminal performs roaming from a home network to a visited network, the terminal receives an ESG from a neighboring network and determines whether to perform user roaming or to perform service roaming according to the received ESG. In this case, the visited network provides the terminal either with an encrypted ESG and a key for the encrypted ESG, or with non-encrypted ESG through a dedicated channel, so that it is possible to provide the ESG only to specified terminals.

Abstract: An apparatus and method for enabling a terminal to continuously receive an on-going service even when the terminal moves out of a serving cell or a home network in a DVB-H CBMS system are provided, in which a network controls a handover, designates a target cell for the terminal if the terminal is to perform the handover on an interactive channel, and when needed, processes the handover over an interactive network.

Abstract: A method and apparatus for receiving user roaming and service roaming services from a foreign network in a terminal that has moved from a home network to the foreign network in a digital broadcasting system are provided, in which the terminal receives an ESG from a foreign service provider after entering into the foreign network, selects a roaming type between user roaming and service roaming by determining if an intended broadcasting service is provided from the foreign network, referring to the ESG, receives the intended service from the foreign service provider, if the roaming type is the user roaming, and receives the intended service from a home service provider over the foreign network, if the roaming type is the service roaming.

Abstract: Disclosed is a method and an apparatus for supporting smooth and seamless handover of a terminal receiving digital broadcasting in a digital broadcasting system. A handover method by a network node includes the steps of receiving a handover proposal message from a terminal, the handover proposal message containing a time for signal quality evaluation, a service ID, and a cell ID, the terminal receiving a broadcasting service from a serving cell; evaluating signal qualities of candidate cells providing a service corresponding to the service ID; calculating a handover candidate parameter based on a result of evaluation of the signal qualities of the candidate cells, the handover candidate parameter indicating time available for handover with regard to respective candidate cells; and transmitting the handover candidate parameter to the terminal.

Abstract: A handover method and apparatus in a digital multimedia broadcasting (DMB) system that transmits/receives broadcast data through a frame group using different frequencies. A handover method includes receiving a first frame group header at a serving frequency, and receiving a burst of the desired service at the serving frequency according to a burst arrival time; calculating a first relative start time of a next frame group header; turning power off until a current time arrives at a next header arrival time; receiving a second frame group header at a searching frequency, and acquiring service information of the searching frequency necessary for handover to the searching frequency; returning to the serving frequency and turning the power off; and comparing signal power/quality of the listened frequencies with each other to select a best frequency, and switching to the selected frequency using the acquired corresponding service information.

Abstract: An apparatus and method for transmitting and receiving broadcasting data in a DMB system are provided to reduce power consumption and implement smooth and seamless service handover. In the transmitting method, a frame group is constructed, which includes one frame group header and at least one signal frame including broadcasting data of a service. The frame group header includes service burst information about services included in at least one following frame group and a first parameter indicating the relative start time of each of the services. The frame group is transmitted in a broadcasting signal.

Abstract: An apparatus and method for transmitting and receiving broadcasting data in a DMB system are provided to reduce power consumption and implement smooth and seamless service handover. A frame group is configured so as to include information about services included in the frame group and information indicating the relative start times of the services.