Apparatus and method for supporting multi-link in multi-hop relay cellular network
First Claim
Patent Images
1. A relay station (RS) transmitter in a multi-hop relay cellular network, the RS transmitter comprising:
- a frame constructor for constructing frames to be transmitted to a mobile station (MS) and a base station (BS) by sequentially positioning a ranging signal, a preamble and downlink (DL) bursts to be transmitted to the MS, and uplink (UL) bursts to be transmitted to the BS; and
a timing controller for providing a timing signal indicating the time to transmit the constructed frames to the MS and the BS.
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Abstract
Provided is an apparatus and method for constructing a frame for transmitting a direct link and a multi-hop relay link signal in one frame in a multi-hop relay cellular network. The signals are multiplexed on a time-division multiplexing basis and a base station downlink and relay station uplink subframe are located in a conventional downlink subframe. Accordingly, the overhead for a relay station receive transition gap in the downlink subframe and a relay station transmit transition gap in the conventional uplink subframe are eliminated.
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Citations
51 Claims
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1. A relay station (RS) transmitter in a multi-hop relay cellular network, the RS transmitter comprising:
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a frame constructor for constructing frames to be transmitted to a mobile station (MS) and a base station (BS) by sequentially positioning a ranging signal, a preamble and downlink (DL) bursts to be transmitted to the MS, and uplink (UL) bursts to be transmitted to the BS; and
a timing controller for providing a timing signal indicating the time to transmit the constructed frames to the MS and the BS. - View Dependent Claims (2, 3)
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4. A relay station (RS) receiver in a multi-hop relay cellular network, the RS receiver comprising:
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a frame extractor for extracting a base station (BS) preamble, base station downlink (BS DL) control information, BS DL data from a DL subframe received from the BS and an RS uplink (UL) burst and an RS ranging signal a UL subframe received from a mobile station (MS); and
a timing controller for providing a timing signal for determining whether the DL subframe and the UL subframe are received through a direct link or through a relay rink. - View Dependent Claims (5, 6, 7)
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8. A base station (BS) transmitter in a multi-hop relay cellular network, the BS transmitter comprising:
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a frame constructor for constructing a downlink (DL) frame to be transmitted to a mobile station (MS) and a relay station (RS) by using a preamble signal, control information and a DL burst; and
a timing controller for providing a timing signal indicating the time to transmit the constructed DL frame. - View Dependent Claims (9)
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10. A base station (BS) receiver in a multi-hop relay cellular network, the BS receiver comprising:
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a frame extractor for receiving uplink (UL) frames from a relay station (RS) and a mobile station (MS) and splitting the received uplink (UL) frames into a ranging signal, a UL burst transmitted from the RS and a UL burst transmitted from the MS; and
a timing controller for providing a timing signal for determining whether to receive the UL frames. - View Dependent Claims (11, 12)
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13. A method for receiving signals at a relay station (RS) in a multi-hop relay cellular network, the method comprising the steps of:
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determining whether a downlink (DL) subframe is received from a base station (BS);
if the DL subframe is received, determining whether an uplink (UL) subframe is received from a mobile station (MS); and
if the UL subframe is received, switching into a transmission (TX) mode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for transmitting signals from a relay station (RS) in a time-division multiplexing (TDM) multi-hop relay cellular network, the method comprising the steps of:
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transmitting a ranging signal to a base station (BS);
transmitting a downlink (DL) subframe to mobile stations (MS) after the transmission of the ranging signal;
transmitting uplink (UL) subframe to the BS after the transmission of the DL subframe; and
switching into a receiving (RX) mode after the transmission of the UL bursts. - View Dependent Claims (21, 22, 23)
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24. A method for transmitting signals from a relay station (RS) in a frequency division multiplexing (FDM) multi-hop relay cellular network, the method comprising the steps of:
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transmitting a ranging signal to a base station (BS);
transmitting a preamble signal to a mobile station (MS) after the transmission of the ranging signal;
after the transmission of the preamble signal, transmitting an uplink (UL) subframe and a downlink (DL) subframe respectively to the BS and the MS on an FDM basis; and
switching into a receiving (RX) mode after the transmission of the UL subframe and the DL subframe. - View Dependent Claims (25)
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26. A method for transmitting signals from a base station (BS) in a multi-hop relay cellular network, the method comprising the steps of:
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constructing a downlink (DL) subframe to be transmitted to a relay station (RS) and a mobile station (MS) connected through a direct link to the BS and transmitting the DL subframe; and
switching into a receiving (RX) mode after the transmission of the DL subframe. - View Dependent Claims (27, 28, 29)
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30. A method for receiving signals at a base station (BS) in a multi-hop relay cellular network, the method comprising the steps of:
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detecting a receiving (RX) start section and a start point of an uplink (UL) subframe transmitted from a relay station (RS) and a mobile station (MS), when a ranging signal is received from the RS and the MS;
receiving the UL subframe if the start point is less than the RX start section; and
switching into a transmission (TX) mode after the receipt of the UL subframe. - View Dependent Claims (31)
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32. A method for transmitting signals from a mobile station (MS) communicating with a relay station (RS) in a multi-hop relay cellular network, the method comprising the steps of:
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transmitting an uplink (UL) subframe to the RS;
transmitting a ranging signal to the RS after the transmission of the UL subframe; and
switching into a receiving (RX) mode after the transmission of the ranging signal. - View Dependent Claims (33)
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34. A method for receiving signals at a mobile station (MS) communicating with a relay station (RS) in a multi-hop relay cellular network, the method comprising the steps of:
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receiving a preamble from the RS to obtain synchronization;
receiving a downlink (DL) subframe from the RS to detect DL data after obtaining synchronization; and
switching into a transmission (TX) mode after detecting the DL data. - View Dependent Claims (35)
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36. A method for transmitting signals from a mobile station (MS) connected through a direct link to a base station (BS) in a multi-hop relay cellular network, the method comprising the steps of:
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transmitting a ranging signal to the BS;
transmitting an uplink (UL) subframe to the BS after the transmission of the ranging signal; and
switching into a receiving (RX) mode after the transmission of the UL subframe.
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37. A method for receiving signals at a mobile station (MS) connected through a direct link to a base station (BS) in a multi-hop relay cellular network, the method comprising the steps of:
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receiving a preamble from the BS to obtain synchronization;
sequentially receiving control information and a DL burst from the BS after obtaining the synchronization; and
switching into a transmission (TX) mode after receiving the control information and the DL burst. - View Dependent Claims (38, 39, 40)
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41. A method for constructing a frame for supporting a relay service in a multi-hop relay cellular network, the method comprising the steps of:
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constructing a first subframe for performing a receiving (RX) operation of a relay station (RS) during a first section of the frame; and
constructing a second subframe for performing a transmission (TX) operation of an RS during a second section of the frame. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification