Physical control channel monitoring
Provided is a terminal that performs communication with a base station, in which, in a case where a physical downlink control channel is monitored in a first enhanced physical downlink control channel-physical resource block set, a demodulation reference signal is used that is based on a scrambling sequence which is initialized by a prescribed parameter, and in which, in a case where the physical downlink control channel is monitored in a second enhanced physical downlink control channel-physical resource block set, a demodulation reference signal is used that is based on a scrambling sequence which is initialized by a parameter that is set individually for each terminal.
1. User equipment (UE) which communicates with a base station in a cell, the UE comprising:
reception circuitry that receives a cell-specific reference signal, a first demodulation reference signal, and a second demodulation reference signal; and
extract circuitry that monitors a first physical control channel and a second physical control channel, wherein
the first demodulation reference signal and the first physical control channel are transmitted on a same antenna port(s),
the second demodulation reference signal and the second physical control channel are transmitted on a same antenna port(s),
the first physical control channel is a physical control channel which is allocated in common search space,
the second physical control channel is a physical control channel which is allocated in UE-specific search space,
a resource block set for the first physical control channel consists of a pre-determined set of resource blocks included in a given bandwidth,
a resource block set for the second physical control channel consists of a set of resource blocks which are configured via dedicated RRC signaling, and
the first demodulation reference signal is generated using a sequence which is initiated based on a cell identity of the cell.
2. The UE of claim 1 , wherein
the first physical control channel is mapped based on the cell-specific reference signal and the first demodulation reference signal, and
the second physical control channel is mapped based on the cell-specific reference signal and the second demodulation reference signal.
3. A base station which communicates with a user equipment (UE) in a cell, the base station comprising:
transmission circuitry that transmits a cell-specific reference signal, a first demodulation reference signal, and a second demodulation reference signal; and
generation circuitry that generates a first physical control channel and a second physical control channel, wherein
the first demodulation reference signal and the first physical control channel are transmitted on a same antenna port(s),
the second demodulation reference signal and the physical control channel are transmitted on a same antenna port(s),
the first physical control channel is a physical control channel which is allocated in common search space,
the second physical control channel is a physical control channel which is allocated in UE-specific search space,
a resource block set for the first physical control channel consists of a pre-determined set of resource blocks included in a given bandwidth, and
a resource block set for the second physical control channel consists of a set of resource blocks which are configured via dedicated RRC signaling, and
the first demodulation reference signal is generated using a sequence which is initiated based on a cell identity of the cell.
4. The base station of claim 3 , wherein
the first physical control channel is mapped based on the cell-specific reference signal and the first demodulation reference signal, and
the second physical control channel is mapped based on the cell-specific reference signal and the second demodulation reference signal.
5. A method for a user equipment (UE) which communicates with a base station in a cell, the method comprising:
receiving a cell-specific reference signal;
receiving a first demodulation reference signal;
receiving a second demodulation reference signal;
monitoring a first physical control channel; and
monitoring a second physical control channel, wherein
the first demodulation reference signal and the first physical control channel are transmitted on a same antenna port(s),
the second demodulation reference signal and the second physical control channel are transmitted on a same antenna port(s),
the first physical control channel is a physical control channel which is allocated in common search space,
the second physical control channel is a physical control channel which is allocated in UE-specific search space,
a resource block set for the first physical control channel consists of a pre-determined set of resource blocks included in a given bandwidth, and
a resource block set for the second physical control channel consists of a set of resource blocks which are configured via dedicated RRC signaling, and
the first demodulation reference signal is generated using a sequence which is initiated based on a cell identity of the cell.
6. A method for a base station which communicates with a user equipment (UE) in a cell, the method comprising:
transmitting a cell-specific reference signal;
transmitting a first demodulation reference signal;
transmitting a second demodulation reference signal;
generating a first physical control channel; and
generating a second physical control channel, wherein
the first demodulation reference signal and the first physical control channel are transmitted on a same antenna port(s),
the second demodulation reference signal and the second physical control channel are transmitted on a same antenna port(s),
the first physical control channel is a physical control channel which is allocated in common search space,
the second physical control channel is a physical control channel which is allocated in UE-specific search space,
a resource block set for the first physical control channel consists of a pre-determined set of resource blocks included in a given bandwidth, and
a resource block set for the second physical control channel consists of a set of resource blocks which are configured via dedicated RRC signaling, and
the first demodulation reference signal is generated using a sequence which is initiated based on a cell identity of the cell.