METHOD AND APPARATUS FOR SYSTEM ACQUISITION IN A MOBILE COMMUNICATION TERMINAL
First Claim
1. An apparatus for acquiring a system in a mobile communication terminal, the apparatus comprising:
- a Radio Frequency (RF) communication unit for transmitting and receiving a radio frequency signal;
a location signal receiver for receiving a location signal;
a system list storage unit for storing a system list to be searched for acquiring a system; and
a control unit for acquiring the system by searching the stored system list stored in the system list storage unit for a closest system to a current calculated location of the mobile communication terminal from the location signal received by the location signal receiver.
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Accused Products
Abstract
A method and an apparatus are provided for acquiring, in a reduced time, a system using location information in a mobile communication terminal. When a mobile communication terminal is turned on or disconnects with a base station, a Preferred Roaming List (PRL) is searched in order of closeness of a system to the current location of the mobile communication terminal. At predetermined time intervals, the systems of the PRL are arrayed in order of closeness of a system to the current location, and the arrayed PRL is searched. The present invention can reduce the time taken to acquire a system.
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Citations
25 Claims
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1. An apparatus for acquiring a system in a mobile communication terminal, the apparatus comprising:
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a Radio Frequency (RF) communication unit for transmitting and receiving a radio frequency signal; a location signal receiver for receiving a location signal; a system list storage unit for storing a system list to be searched for acquiring a system; and a control unit for acquiring the system by searching the stored system list stored in the system list storage unit for a closest system to a current calculated location of the mobile communication terminal from the location signal received by the location signal receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for acquiring a system in a mobile communication terminal, the method comprising:
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searching, upon turning on the mobile communication terminal, systems that were used most recently; calculating, if a system is not acquired by searching the most recently used systems, a current location of the mobile communication terminal; searching systems in order of closeness of the systems to the calculated current location; and transforming, if a system is acquired by searching the systems, a state of the mobile communication terminal into an idle state. - View Dependent Claims (17, 18, 19, 20)
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21. A method for acquiring a system in a mobile communication terminal, comprising:
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searching, upon disconnecting from a base station, systems that were used most recently; searching, if a system is not acquired by searching the most recently used systems, systems to be roamed; calculating, if a system is not acquired by searching systems to be roamed, a current location of the mobile communication terminal; searching systems in an order of closeness to the calculated current location; and transforming, if a system is acquired, a state of the mobile communication terminal into an idle state. - View Dependent Claims (22, 23, 24, 25)
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Specification