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US 2013/0294369 A1Published application
Control Channel in a Wireless Communication System
AssigneeComcast Cable Communications, LLC
InventorEsmael Hejazi Dinan
Life of this patent
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Abstract
A base station receives channel state information from a wireless device. The base station transmits to the wireless device one or more data packets on a data channel employing a first precoding matrix identifier. The base station transmits one or more control packets on a control channel to the wireless device employing a second precoding matrix.
Claims20
A method comprising:
- a) transmitting, by a base station, channel state information reference signals on a first plurality of OFDM subcarriers of a first plurality of OFDM symbols of a first subset of subframes in a plurality of subframes;
- b) receiving, by said base station from a wireless device, a first channel state information, said first channel state information comprising a first precoding matrix identifier, said first channel state information being computed employing, at least in part, said channel state information reference signals;
- c) transmitting, employing said first precoding matrix identifier, first downlink signals on a second plurality of OFDM subcarriers of a second plurality of OFDM symbols of a subframe, said first downlink signals comprising:
- i) one or more data packets on a data channel;
- and
- ii) first demodulation reference signals, said first demodulation reference signals being employed to demodulate said one or more data packets;
- and
- d) transmitting, employing a second precoding matrix, second downlink signals on a third plurality of OFDM subcarriers of a third plurality of OFDM symbols of said subframe, said second downlink signals comprising:
- i) one or more control packets on a control channel, said one or more control packets carrying scheduling information for said data channel;
- and
- ii) second demodulation reference signals, said second demodulation signals being employed to demodulate said one or more control packets;
- and
- wherein said second precoding matrix is computed based, at least in part, on said first channel state information.
10 more elements
A method comprising:
- a) transmitting, by a base station, channel state information reference signals;
- b) receiving, by said base station from a wireless device, a first channel state information, said first channel state information comprising a first precoding matrix identifier, said first channel state information being computed employing, at least in part, said channel state information reference signals;
- c) transmitting first downlink signals, by said base station to said wireless device, employing said first precoding matrix identifier, said first downlink signals comprising:
- i) one or more data packets on a data channel;
- and
- ii) first demodulation reference signals, said first demodulation reference signals being employed to demodulate said one or more data packets;
- and
- d) transmitting second downlink signals, by said base station to said wireless device, employing a second precoding matrix, said second downlink signals comprising:
- i) one or more control packets on a control channel, said one or more control packets carrying scheduling information for said data channel;
- and
- ii) second demodulation reference signals, said second demodulation signals are employed to demodulate said one or more control packets;
- and
- wherein said second precoding matrix is computed based, at least in part, on said first channel state information.
10 more elements
A base station comprising:
- a) one or more communication interfaces;
- b) one or more processors;
- and
- c) memory storing instructions that, when executed, cause said base station to:
- i) receive from a wireless device, a first channel state information, said first channel state information comprising a first precoding matrix identifier;
- ii) transmit to said wireless device one or more data packets on a data channel employing said first precoding matrix identifier;
- and
- iii) transmit one or more control packets on a control channel to said wireless device employing a second precoding matrix, said control channel carries scheduling information for said data channel;
- and
- wherein said second precoding matrix is computed based, at least in part, on said first channel state information
7 more elements
Dependencies are inferred from the claim text.