Wireless communication method and wireless communication system
AssigneeHitachi, Ltd.
InventorsHitoshi ISHIDA, Tomonori YAMAMOTO, Satoshi TAMAKI, Tsuyoshi TAMAKI
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Abstract
When a carrier aggregation using a macro cell of a legacy carrier as a primary cell and using a small cell of a new carrier type as a secondary cell is performed, transmission of a control channel (PUCCH) of an uplink is concentrated on an uplink of the macro cell and frequency efficiency is degraded. For this reason, in a state in which the macro cell is configured as the primary cell, a serving cell transmitting the PUCCH is configured to a terminal and the terminal transmits the PUCCH using the configured serving cell.
Claims15
A wireless communication method of performing communication using a plurality of frequency carriers,
- wherein a cell in which a terminal establishes connection is configured as a first cell and a cell other than the first cell is configured as a second cell,
- a frequency carrier corresponding to the first cell is configured as a first frequency carrier and a frequency carrier corresponding to the second cell is configured as a second frequency carrier,
- a base station transmits information to configure a frequency carrier transmitting information of a control channel of an uplink of a physical layer as the second frequency carrier to the terminal by a control signal of an higher layer, and
- the terminal transmits the information of the control channel of the uplink of the physical layer using the second frequency carrier, on the basis of the transmitted information.
A wireless communication system for performing communication using a plurality of frequency carriers,
- wherein the wireless communication system has a first base station corresponding to a first cell and a second base station corresponding to a second cell, when a cell in which a terminal establishes connection is configured as the first cell and a cell other than the first cell is configured as the second cell,
- the first base station transmits information to change a transmission destination to transmit information of a control channel of an uplink of a physical layer from the first base station to the second base station to the terminal, and
- the second base station receives the information of the control channel of the uplink of the physical layer from the terminal.
A wireless communication method of performing communication using a frequency carrier of a new carrier type,
- wherein a base station transmits a reference signal for synchronization tracking of the frequency carrier to a terminal, in a subframe in which the remainder obtained by dividing a cell identifier of a physical layer by 5 is equal to the remainder obtained by dividing a subframe number by 5.
Dependencies are inferred from the claim text.