Handover method and apparatus for mobile terminal using location information in heterogeneous system network
First Claim
1. A method of providing location information by a wireless terminal in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected to each other through a predetermined network, the method comprising:
- detecting a wireless network system to which a connection is tried to be established on the basis of the intensities of signals received from the base stations of the wireless network systems;
generating a message providing location information, including the location information of the wireless terminal, obtained based on information provided by a location recognition system; and
transmitting the message providing the location information to a location service server located in a common core network through the detected wireless network system.
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Abstract
A handover method and apparatus for a mobile terminal using location information in a network of heterogeneous systems are provided. The handover method uses service area map information provided by a location service server in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected through a predetermined network and, includes: receiving service area map information transmitted from the location service server; the mobile terminal determining whether or not the location of the mobile terminal is within the service area map; and if it is determined that the mobile terminal is within the service area map, the wireless terminal selecting an accessible wireless network system and then activating a unit for communicating with a base station of the selected wireless network system. According to the method, a battery consumption problem that occurs by activating all modems when a wireless terminal, which is connected to a predetermined mobile communication system in an environment where a plurality of heterogeneous systems are overlapping each other, is searching for candidate systems in order to perform handover to a heterogeneous network, can be solved. Also, a problem where finding a candidate system is time-consuming can be solved.
47 Citations
25 Claims
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1. A method of providing location information by a wireless terminal in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected to each other through a predetermined network, the method comprising:
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detecting a wireless network system to which a connection is tried to be established on the basis of the intensities of signals received from the base stations of the wireless network systems;
generating a message providing location information, including the location information of the wireless terminal, obtained based on information provided by a location recognition system; and
transmitting the message providing the location information to a location service server located in a common core network through the detected wireless network system. - View Dependent Claims (2, 3)
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4. A method of building a service area map of a location service server by using location information of a wireless terminal in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected to each other through a predetermined network, the method comprising:
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forming a map in relation to each of the wireless network systems;
receiving a message from the wireless terminal providing location information, including the location information of the wireless terminal, and the intensity value of a signal received from the base station of an accessible wireless network system; and
selecting a reference point closest to the location of the wireless terminal in relation to each of the wireless network systems, based on the location information of the wireless terminal, and storing the intensity value of the signal in a location corresponding to the selected reference point. - View Dependent Claims (5, 6, 7, 9)
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8. The method of claim 8, further comprising:
transmitting the service area map of the wireless network systems set by storing the signal intensity value, to the wireless terminal.
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10. A handover method for a mobile terminal, the method using service area map information provided by a location service server in a mobile communication network in which at least one or more heterogeneous wireless network systems are connected through a predetermined network, the method comprising:
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receiving service area map information transmitted from the location service server;
the mobile terminal determining whether or not the location of the mobile terminal is within the service area map; and
if it is determined that the mobile terminal is within the service area map, the wireless terminal selecting an accessible wireless network system and then activating a unit for communicating with a base station of the selected wireless network system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A wireless terminal comprising:
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a message generation unit receiving inputs of the signal intensities and location information received from base stations of at least one or more heterogeneous wireless network systems, and generating a message providing location information with an identifier of an accessible wireless network system; and
a modem selection unit activating a modem for a base station of an accessible wireless network system according to wireless network system information provided by a location service server. - View Dependent Claims (19, 20, 21)
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22. A location service server comprising:
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a map storage unit generating and storing a grid-shape map in relation to each of wireless network systems forming a mobile communication network;
a reference point selection unit receiving from a wireless terminal a message providing the location information from the wireless terminal, an identifier of an accessible wireless network system, and the intensity of a signal received from a base station, searching the map storage unit, and selecting a reference point close to the location of the location information of the wireless terminal; and
a signal intensity recording unit recording the signal intensity value at the selected reference point of the base station of each of the wireless network systems. - View Dependent Claims (23, 24, 25)
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Specification