BASE STATION, COMMUNICATION TERMINAL, TRANSMISSION METHOD, AND RECEPTION METHOD
First Claim
1. A base station employing a multicarrier scheme and performing frequency scheduling in a frequency band including multiple resource blocks each including one or more subcarriers, the base station comprising:
- a frequency scheduler configured to receive channel condition information from communication terminals and to generate scheduling information for allocating one or more of the resource blocks to each of selected ones of the communication terminals having good channel conditions based on the channel condition information;
a coding and modulation unit configured to encode and modulate control channels including a general control channel to be decoded by the communication terminals in general and specific control channels to be decoded by the selected ones of the communication terminals that are allocated one or more of the resource blocks; and
a multiplexing unit configured to time-division-multiplex the general control channel and the specific control channels according to the scheduling information,wherein the resource blocks specified in the specific control channels and allocated for uplink data transmission are associated with the resource blocks used to transmit downlink acknowledgement information.
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Accused Products
Abstract
A disclosed base station includes a management unit for managing frequency blocks, a scheduler for generating scheduling information for each of the frequency blocks to allocate one or more resource blocks to each of selected communication terminals having good channel conditions, a channel generating unit for generating control channels including the scheduling information for the respective frequency blocks, a multiplexing unit for frequency-multiplexing the control channels in a system frequency band, and a transmitting unit for transmitting the frequency-multiplexed control channels according to a multicarrier scheme. The control channels transmitted by the base station includes a general control channel to be decoded by communication terminals in general and specific control channels to be decoded by selected communication terminals that are allocated one or more resource blocks.
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Citations
25 Claims
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1. A base station employing a multicarrier scheme and performing frequency scheduling in a frequency band including multiple resource blocks each including one or more subcarriers, the base station comprising:
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a frequency scheduler configured to receive channel condition information from communication terminals and to generate scheduling information for allocating one or more of the resource blocks to each of selected ones of the communication terminals having good channel conditions based on the channel condition information; a coding and modulation unit configured to encode and modulate control channels including a general control channel to be decoded by the communication terminals in general and specific control channels to be decoded by the selected ones of the communication terminals that are allocated one or more of the resource blocks; and a multiplexing unit configured to time-division-multiplex the general control channel and the specific control channels according to the scheduling information, wherein the resource blocks specified in the specific control channels and allocated for uplink data transmission are associated with the resource blocks used to transmit downlink acknowledgement information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A transmission method used by a base station that employs a multicarrier scheme and performs frequency scheduling, the method comprising the steps of:
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receiving channel condition information from communication terminals and generating scheduling information for allocating one or more of resource blocks each including one or more subcarriers to each of selected ones of the communication terminals having good channel conditions based on the channel condition information; encoding and modulating control channels including a general control channel to be decoded by the communication terminals in general and specific control channels to be decoded by the selected ones of the communication terminals that are allocated one or more of the resource blocks; and time-division-multiplexing the general control channel and the specific control channels according to the scheduling information, wherein the resource blocks specified in the specific control channels and allocated for uplink data transmission are associated with the resource blocks used to transmit downlink acknowledgement information.
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24. A communication terminal used in a communication system where a multicarrier scheme is employed and frequency scheduling is performed, the communication terminal comprising:
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a receiving unit configured to receive control channels including a general control channel to be decoded by communication terminals in general and specific control channels to be decoded by selected communication terminals to each of which one or more resource blocks are allocated; a separating unit configured to separate the general control channel and the specific control channels that are time-division-multiplexed; a control channel decoding unit configured to decode the general control channel and to decode a corresponding one of the specific control channels that is included in the one or more of the resource blocks allocated to the communication terminal based on resource block allocation information in the general control channel; and a transmitting unit configured to transmit a data channel using one or more resource blocks specified in the corresponding one of the specific control channels and allocated for uplink data transmission, wherein the resource blocks specified in the specific control channels and allocated for uplink data transmission are associated with resource blocks used to transmit downlink acknowledgement information.
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25. A reception method used by a communication terminal in a communication system where a multicarrier scheme is employed and frequency scheduling is performed, the method comprising the steps of:
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receiving control channels including a general control channel to be decoded by communication terminals in general and specific control channels to be decoded by selected communication terminals to each of which one or more resource blocks are allocated; separating the general control channel and the specific control channels that are time-division-multiplexed; decoding the general control channel and decoding a corresponding one of the specific control channels that is included in the one or more of the resource blocks allocated to the communication terminal based on resource block allocation information in the general control channel; and transmitting a data channel using one or more resource blocks specified in the corresponding one of the specific control channels and allocated for uplink data transmission, wherein the resource blocks specified in the specific control channels and allocated for uplink data transmission are associated with resource blocks used to transmit downlink acknowledgement information.
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Specification