Apparatus and method for transmitting and receiving control information in a broadband wireless communication system using half frequency division duplex
AssigneeSamsung Electronics Co., Ltd.
InventorsJun-Sung Lim, Jae-Weon Cho, Ho-Kyu Choi
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Abstract
An apparatus and method for transmitting/receiving control information in a broadband wireless communication system using Half Frequency Division Duplex (H-FDD) are provided. An operation of a Mobile Station (MS) includes, in the case of a frame at which control information is not transmitted, performing uplink communication at a front end of the frame and, in the case of a frame at which the control information is transmitted, performing downlink communication at a front end of the frame.
Claims10
A method for transmitting control information by a Base Station (BS) in a wireless communication system using Half Frequency Division Duplex (H-FDD), the method comprising:
- generating a control information sub-frame;
- mapping symbols of the control information sub-frame at a first sub-frame of a first frame;
- repeatedly mapping at least one symbol among the symbols of the control information at a last sub-frame of a second frame that is earlier than the first frame;
- transmitting the at least one symbol through the last sub-frame of the second frame and the symbols of the control information sub-frame through the first sub-frame of the first frame, and
- determining if there is an H-FDD Mobile Station (MS) operating in a transmission mode at a front end of the first frame,
- wherein the transmitting of the at least one symbol at the last sub-frame of the frame earlier than the first frame is performed when there is the H-FDD MS operating in the transmission mode at the front end of the first frame.
An apparatus for a Base Station (BS) in a wireless communication system using Half Frequency Division Duplex (H-FDD), the apparatus comprising:
- a control sub-frame constructor for generating a control information sub-frame;
- a mapper for mapping symbols of the control information sub-frame at a first sub-frame of a first frame, and for repeatedly mapping at least one symbol among the symbols of the control information at a last sub-frame of a second frame that is earlier than the first frame;
- a transmitter for transmitting the at least one symbol through the last sub-frame of the second frame and the symbols of the control information sub-frame through the sub-frame of the first frame;
- and
- a scheduler for, if there is an H-FDD Mobile Station (MS) operating in a transmission mode at a front end of the first frame, determining to map the at least one symbol to a last sub-frame of the frame earlier than the first frame.
A wireless communication system using Half Frequency Division Duplex (H-FDD), the system comprising:
- a Mobile Station (MS) for receiving at least one symbol of a control information sub-frame through a last downlink sub-frame of a second frame that is earlier than a first frame in which control information is transmitted,
- for receiving at least one remaining symbol of the control information sub-frame, other than the at least one symbol, by maintaining a reception mode at a first sub-frame of the first frame, and
- for constructing the control information sub-frame by combining the at least one symbol and the at least one remaining symbol,
- wherein the MS changes into a transmission mode by using, as a Transmit/receive Transition Gap (TTG) interval, an interval other than a reception interval of the at least one remaining symbol of a first sub-frame interval of the first frame.
Dependencies are inferred from the claim text.