COMMUNICATION SYSTEM HAVING NETWORK ACCESS STRUCTURE
First Claim
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1. A central unit, comprising:
- a central controller configured to form at least one virtual cell by merging at least two cells among a plurality of cells of radio access units, or to form the at least one virtual cell by separating at least one cell among the plurality of the cells of the radio access units;
first processing modules configured to perform signal processing in a radio resource control (RRC) layer, a media access control (MAC) layer, and a physical (PHY) layer for the at least one virtual cell; and
a switch configured to connect the first processing modules to radio access units according to whether the cells of the radio access units are merged or are separate,wherein each of the radio access units comprises a second processing module, and each second processing module is configured to transmit and receive a radio frequency (RF) signal using at least one antenna.
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Abstract
A communication system with an improved network access structure for inter-cell cooperation is provided. The communication system includes a central unit and at least one radio access unit. The at least one radio access unit may form at least one virtual cell by merging or separating cells of radio access units according to a distribution of terminals, statuses of channels, an amount of traffic, and the like.
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Citations
20 Claims
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1. A central unit, comprising:
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a central controller configured to form at least one virtual cell by merging at least two cells among a plurality of cells of radio access units, or to form the at least one virtual cell by separating at least one cell among the plurality of the cells of the radio access units; first processing modules configured to perform signal processing in a radio resource control (RRC) layer, a media access control (MAC) layer, and a physical (PHY) layer for the at least one virtual cell; and a switch configured to connect the first processing modules to radio access units according to whether the cells of the radio access units are merged or are separate, wherein each of the radio access units comprises a second processing module, and each second processing module is configured to transmit and receive a radio frequency (RF) signal using at least one antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a terminal, the method comprising:
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transmitting, to at least one of a plurality of radio access units, information associated with at least one condition selected from a group consisting of a data rate requested by the terminal, a requested QoS, a channel status, an interference amount, and any combination thereof; receiving, from at least one of the plurality of radio access units, information associated with a virtual cell, the virtual cell formed by merging cells of the plurality of radio access units or by separating the cells of the plurality of radio access units for cooperative communication with respect to the terminal; and performing an initialization for communication with the plurality of radio access units in the virtual cell. - View Dependent Claims (18, 19)
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20. A non-transitory computer-readable recording medium storing a program to implement a method of operating a terminal, the method comprising:
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transmitting, to at least one of a plurality of radio access units, information associated with at least one condition selected from a group consisting of a data rate requested by the terminal, a requested QoS, a channel status, an interference amount, and any combination thereof; receiving, from at least one of the plurality of radio access units, information associated with a virtual cell, the virtual cell formed by merging cells of the plurality of radio access units or by separating the cells of the plurality of radio access units for cooperative communication with respect to the terminal; and performing an initialization for communication with the plurality of radio access units in the virtual cell.
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Specification