Method and apparatus for selecting neighbor cells in mobile communication system
First Claim
1. A method of a terminal in a mobile communication system, the method comprising:
- receiving, from a base station, system information including a set of physical cell identities reserved for closed subscriber group (CSG) cells;
starting a timer based on the system information;
determining whether the terminal is in an any cell selection state; and
selecting a cell based on whether the terminal is in the any cell selection state and whether the timer has expired,wherein the cell is selected among cells including the CSG cells without applying the set of physical cell identities reserved for the CSG cells when the terminal is in the any cell selection state or the timer has expired.
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Abstract
A neighbor cell search method and apparatus of a User Equipment (UE) is provided for performing the cell search procedure with the utilization of a Physical Cell Identity (PCI) list of PCIs used by evolved Node Bs (eNBs) for a Closed Subscriber Group (CSG) which is from an eNB in a Long Term Evolution (LTE) system. The cell search method includes selecting a cell of a base station, receiving system information including a Physical Cell Identity (PCI) list used by neighbor Closed Subscribed Group (CSG) cells of the base station, determining whether the terminal is in an any cell selection state for selecting any cell, and searching, when the terminal is in the any cell selection state, neighbor cells without application of the PCI list. The cell search method and apparatus are capable of performing the cell search procedure to appropriate eNBs, resulting in improvement of network attachment efficiency.
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Citations
10 Claims
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1. A method of a terminal in a mobile communication system, the method comprising:
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receiving, from a base station, system information including a set of physical cell identities reserved for closed subscriber group (CSG) cells; starting a timer based on the system information; determining whether the terminal is in an any cell selection state; and selecting a cell based on whether the terminal is in the any cell selection state and whether the timer has expired, wherein the cell is selected among cells including the CSG cells without applying the set of physical cell identities reserved for the CSG cells when the terminal is in the any cell selection state or the timer has expired. - View Dependent Claims (2, 3, 4, 5)
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6. A terminal in a mobile communication system, the terminal comprising:
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a transceiver configured to transmit and receive signals to and from a base station; and at least one controller coupled to the transceiver, the at least one controller configured to; receive, from the base station, system information including a set of physical cell identities reserved for closed subscriber group (CSG) cells, start a timer based on the system information, determine whether the terminal is in an any cell selection state, and select a cell based on whether the terminal is in the any cell selection state and whether the timer has expired, wherein the cell is selected among cells including the CSG cells without applying the set of physical cell identities reserved for the CSG cells when the terminal is in the any cell selection state or the timer has expired. - View Dependent Claims (7, 8, 9, 10)
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Specification