Terminal for entering coverage of small base station, small base station, network apparatus, and method
First Claim
Patent Images
1. A network apparatus, comprising:
- a node list search unit to search for small base stations accessible to a terminal in response to a request for closed subscriber group (CSG) selection from the terminal;
a first controller to control the accessible small base stations to operate in an active mode; and
a second controller to control a first small base station, on which the terminal is camped, from among the accessible small base stations to maintain the active mode, and to control the remaining of the accessible small base stations, on which the terminal is not camped, to switch from the active mode to an inactive mode and to operate in the inactive mode.
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Abstract
A terminal for entering a coverage of a small base station, a network apparatus, and a method for operating the same are provided. The network apparatus controls small base stations, on which the terminal is camped, to operate in an active mode in which the small base station emits radio frequency (RF) signals, and controls small base stations, accessible by the terminal but not camped on by the terminal, to operate in an inactive mode in which the small base station does not emit RF signals.
21 Citations
20 Claims
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1. A network apparatus, comprising:
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a node list search unit to search for small base stations accessible to a terminal in response to a request for closed subscriber group (CSG) selection from the terminal; a first controller to control the accessible small base stations to operate in an active mode; and a second controller to control a first small base station, on which the terminal is camped, from among the accessible small base stations to maintain the active mode, and to control the remaining of the accessible small base stations, on which the terminal is not camped, to switch from the active mode to an inactive mode and to operate in the inactive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A terminal, comprising:
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a communication unit to transmit a closed subscriber group (CSG) selection request to a network apparatus; a node detection unit to detect small base stations after receiving a CSG selection response from the network apparatus in response to the CSG request; and a node access unit to enter a coverage of a selected small base station by camping on the selected small base station from among the detected small base stations, wherein the network apparatus controls a small base station accessible by the terminal to operate in an active mode and to maintain the active mode in which the small base station emits radio frequency (RF) signals, determines which small base station is selected by the terminal to be camped on, and controls remaining small base stations, on which the terminal is determined as not being camped on, to operate in an inactive mode in which the small base station does not emit RF signals. - View Dependent Claims (9, 10, 11)
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12. A small base station, comprising:
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a controller to determine a mode of the small base station based on whether the small base station senses signals from a macro cell, to control a radio frequency (RF) signal emission based on the determined mode, to maintain an active mode in response to a received signal, and to switch the mode of the small base station in response to a mode switch request received from a network apparatus, wherein the mode of the small base station comprises an active mode and an inactive mode, wherein the small base station is accessible by a terminal, and wherein the network apparatus transmits the mode switch request to switch the small base station to the inactive mode if the network apparatus determines that the terminal is camped on another small base station accessible by the terminal. - View Dependent Claims (13)
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14. A method for operating a network system, the method comprising:
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searching for small base stations accessible to a terminal in response to a closed subscriber group (CSG) selection request from the terminal; controlling the accessible small base stations to operate in an active mode; determining whether the terminal is camped on a first small base station, the first small base station being one of the accessible small base stations; and controlling the first small base station, on which the terminal is camped, to maintain the active mode, and controlling the remaining accessible small base stations, on which the terminal is not camped, to switch from the active mode to an inactive mode and to operate in the inactive mode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification