Method and Apparatus for Supporting a Handover Using an Interactive Channel in a Dvb-H Cbms System
First Claim
1. A method for performing a handover for a terminal in a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
- checking a received strength of a broadcast service currently being received;
sending a request for handover-related information from the terminal to a network through an interactive channel;
selecting new handover candidate cells based on the handover-related information received from the network through the interactive channel;
measuring strengths of broadcast service signals received from the candidate cells;
performing a tuning operation for detecting a transport stream of the service currently being received by shifting a reception frequency to a retrieved frequency; and
continuously receiving the service currently being received.
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Accused Products
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.
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Citations
18 Claims
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1. A method for performing a handover for a terminal in a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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checking a received strength of a broadcast service currently being received; sending a request for handover-related information from the terminal to a network through an interactive channel; selecting new handover candidate cells based on the handover-related information received from the network through the interactive channel; measuring strengths of broadcast service signals received from the candidate cells; performing a tuning operation for detecting a transport stream of the service currently being received by shifting a reception frequency to a retrieved frequency; and continuously receiving the service currently being received. - View Dependent Claims (2, 3, 4, 5)
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6. A method for supporting a handover for a terminal in a network of a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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transmitting a broadcast service and Program Specific Information (PSI)/Service Information (SI); receiving a message requesting handover-related information from the terminal through an interactive channel; and transmitting the broadcast service, the PSI/SI, and the handover-related information through the interactive channel. - View Dependent Claims (7)
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8. A method for performing a handover for a terminal in a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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checking a received strength of a broadcast service currently being received; sending a handover request message from the terminal to a network through an interactive channel; receiving a response to the handover request message from the network through the interactive channel; sending a handover confirm message from the terminal to the network through the interactive channel; performing a tuning operation for detecting a transport stream of the service currently being received by shifting a reception frequency at a time defined by channel information included in the handover confirm message; and continuously receiving the service currently. - View Dependent Claims (9, 10, 11, 12)
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13. A method for supporting a handover for a terminal in a network of a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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transmitting a broadcast service and Program Specific Information (PSI)/Service Information (SI); receiving a handover request message from the terminal through an interactive channel; generating a channel for providing the terminal with the broadcast service; and providing the terminal with a handover channel identifier and handover time information along with the broadcast service through the generated channel. - View Dependent Claims (14)
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15. A Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system for supporting a handover, comprising:
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a terminal for requesting at least one of a passive handover and an active handover when a received strength of a service currently being received is less than a reference value; and a network for transmitting a broadcast service and Program Specific Information (PSI)/Service Information (SI), generating a channel for providing the terminal with the broadcast service, and transmitting the broadcast service and the PSI/SI through the generated channel, wherein the network transmits handover-related information through the generated channel when receiving the passive handover request from the terminal and provides the terminal with a handover channel identifier and handover time information along with the broadcast service through the generated channel when receiving the active handover request from the terminal. - View Dependent Claims (16)
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17. A User Equipment (UE) for performing a handover in a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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a content consumption unit for receiving a broadcast service from a broadcasting network; a Program Specific Information (PSI)/Service Information (SI) handler for receiving the PSI/-SI from the broadcasting network; and a mobility manager for sending a request for handover-related information from the UE to a network through an interactive channel, selecting new handover candidate cells based on the handover-related information received from the network through the interactive channel and performing a tuning operation for detecting a transport stream of the service currently being received by shifting a reception frequency to a retrieved frequency.
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18. A User Equipment (UE) for performing a handover in a Digital Video Broadcasting Handheld (DVB-H) Convergence of Broadcasting and Mobile Service (CBMS) system, comprising:
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a content consumption unit for receiving a broadcast service from a broadcasting network; a Program Specific Information (PSI)/Service Information (SI) handler for receiving the PSI/-SI from the broadcasting network; and a mobility manager for sending a handover request message from the UE to a network through an interactive channel, receiving a response to the handover request message from the network through the interactive channel, sending a handover confirm message from the terminal to the network through the interactive channel, and performing a tuning operation for detecting a transport stream of the service currently being received by shifting a reception frequency at a time defined by channel information comprised in the handover confirm message.
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Specification