DVB-H receiving terminal and method for frequency scanning in DVB-H receiving terminal
First Claim
1. A method for frequency scanning in a Digital Video Broadcasting-Handheld (DVB-H) receiving terminal, the method comprising the steps of:
- obtaining cell information of each of a plurality of cells and DVB-H frequencies for each of the plurality of cells, each of the DVB-H frequencies having an intensity higher than a predetermined intensity;
mapping the DVB-H frequencies to the corresponding cell information and storing the DVB-H frequencies mapped to the cell information in a table;
detecting a current cell in which the DVB-H receiving terminal is located when there is a request for DVB-H frequency scanning;
determining if the table includes information about the current cell;
scanning the DVB-H frequency corresponding to the information about the current cell when the table includes the information about the current cell; and
obtaining system information from a digital broadcasting signal input by using the scanned DVB-H frequency, when the scanned DVB-H frequency has an intensity higher than the predetermined intensity,wherein storing the DVB-H frequencies mapped to the cell information in the table comprises;
counting a number of times each of the plurality of cells have been scanned; and
mapping the number of times to the corresponding cell information.
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Accused Products
Abstract
Disclosed is a method for efficiently scanning a frequency of a new broadcasting area when a DVB-H receiving terminal moves. To this end, the DVB-H terminal stores in advance in a table DVB-H frequency changes according to the broadcasting area based on each cell whenever it moves. Then, the DVB-H receiving terminal preliminarily scans the DVB-H frequency previously stored in response to the current cell when the DVB-H receiving terminal moves in the future. If there exist one or more DVB-H frequencies stored in response to each cell, the DVB-H receiving terminal scans the stored DVB-H frequencies one by one in order to find a DVB-H frequency having an intensity higher than a predetermined intensity. The DVB-H receiving terminal quickly and efficiently scans the DVB-H frequencies according to the priority without scanning within all the DVB-H frequency ranges so that it can effectively minimize power consumption.
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Citations
9 Claims
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1. A method for frequency scanning in a Digital Video Broadcasting-Handheld (DVB-H) receiving terminal, the method comprising the steps of:
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obtaining cell information of each of a plurality of cells and DVB-H frequencies for each of the plurality of cells, each of the DVB-H frequencies having an intensity higher than a predetermined intensity; mapping the DVB-H frequencies to the corresponding cell information and storing the DVB-H frequencies mapped to the cell information in a table; detecting a current cell in which the DVB-H receiving terminal is located when there is a request for DVB-H frequency scanning; determining if the table includes information about the current cell; scanning the DVB-H frequency corresponding to the information about the current cell when the table includes the information about the current cell; and obtaining system information from a digital broadcasting signal input by using the scanned DVB-H frequency, when the scanned DVB-H frequency has an intensity higher than the predetermined intensity, wherein storing the DVB-H frequencies mapped to the cell information in the table comprises; counting a number of times each of the plurality of cells have been scanned; and mapping the number of times to the corresponding cell information. - View Dependent Claims (2, 3, 4, 5)
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6. A Digital Video Broadcasting-Handheld (DVB-H) receiving terminal for frequency scanning, the DVB-H receiving terminal comprising:
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a memory for mapping a DVB-H frequency having an intensity higher than a predetermined intensity to cell information obtained when moving between cells, and storing the cell information in a table; a digital broadcasting receiving unit for receiving DVB-H frequency information corresponding to a DVB-H signal when located in a cell area where the DVB-H signal exists; a Radio Frequency (RF) unit for receiving RF signals from a base station located in each cell area; and a controller for determining whether the DVB-H receiving terminal moves between the cell area by measuring a received signal intensity through the RF unit, obtaining information about the cell area and DVB-H frequencies having intensity higher than the predetermined intensity storing the cell information and the DVB-H frequencies in the memory, detecting a current cell where the DVB-H receiving terminal is currently located when there is a request for DVB-H frequency scanning, determining if the table includes information about the current cell, controlling to scan the DVB-H frequency corresponding to the information about the current cell, and obtaining system information from a digital broadcasting signal input by using the scanned DVB-H frequency, when the scanned DVB-H frequency has intensity higher than the predetermined intensity wherein the controller stores the cell information and the DVB-H frequencies in the table by counting a number of times each of the cells have been scanned, and mapping the number of times to the cell information, respectively. - View Dependent Claims (7, 8, 9)
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Specification