Terminal, base station, communication system, and communication method

• US 10,356,763 B2
• Filed: 06/05/2017
• Issued: 07/16/2019
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nogami, Toshizo, Suzuki, Shoichi, Imamura, Kimihiko, Shimezawa, Kazuyuki, Kusashima, Naoki
• Primary Examiner(s): Adhami, Mohammad S
• Application Number:
  US15/614,248
• Publication Number:
  US 20170273075A1
• Time in Patent Office: 771 Days
• Field of Search: None
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Provided is a terminal that performs communication with a base station, in which a Physical Uplink Control Channel is generated by mapping response information to a Physical Uplink Control Channel resource that is determined in accordance with at least a prescribed offset and generates a Physical Uplink Control Channel, in a case where a Physical Downlink Control Channel is detected in a first Enhanced Physical Downlink Control Channel-Physical Resource Block set, and in which a Physical Uplink Control Channel is generated by mapping the response information to a Physical Uplink Control Channel resource that is determined in accordance with at least an offset which is configured individually for every terminal and generates the Physical Uplink Control Channel, in a case where the Physical Downlink Control Channel is detected in a second Enhanced Physical Downlink Control Channel-Physical Resource Block set.

Claims

1. A user equipment (UE) which communicates with a base station in a cell, the UE comprising:

reception circuitry configured to receive a first demodulation reference signal for demodulating EPDCCH; and

extract circuitry configured to monitor a first physical control channel;

wherein

in a mapping of the first physical control channel, mapping to resource elements is carried out under an assumption that the resource elements include resource elements for channel state information reference signal;

the reception circuitry is further configured to receive a cell-specific reference signal and a second demodulation reference signal for demodulating EPDCCH,

the extract circuitry is further configured to monitor a second physical control channel,

the first physical control channel is a physical control channel with CRC scrambled by P-RNTI which is an identity for paging, the first demodulation reference signal and the first physical control channel being transmitted on a same antenna port(s), the first demodulation reference signal being generated using a sequence which is initialized based on a cell identity of the cell, and

the second physical control channel is a physical control channel with CRC scrambled by C-RNTI which is an identity specific to the UE, the second demodulation reference signal and the second physical control channel being transmitted on a same antenna port(s), the second demodulation reference signal being generated using a sequence which is initialized based on a value configured via dedicated RRC signalling.

2. The UE of claim 1, wherein

the first physical control channel is a physical control channel which is allocated in common search space.

3. A base station which communicates with a user equipment (UE) in a cell, the base station comprising:

transmission circuitry configured to transmit a first demodulation reference signal for demodulating EPDCCH; and

generation circuitry configured to generate a first physical control channel;

wherein

in a mapping of the first physical control channel, mapping to resource elements is carried out under an assumption that the resource elements include resource elements for channel state information reference signal;

the transmission circuitry is further configured to transmit a cell-specific reference signal and a second demodulation reference signal for demodulating EPDCCH,

the generation circuitry is further configured to generate a second physical control channel,

the first physical control channel is a physical control channel with CRC scrambled by P-RNTI which is an identity for paging, the first demodulation reference signal and the first physical control channel being transmitted on a same antenna port(s), the first demodulation reference signal being generated using a sequence which is initialized based on a cell identity of the cell, and

the second physical control channel is a physical control channel with CRC scrambled by C-RNTI which is an identity specific to the UE, the second demodulation reference signal and the second physical control channel being transmitted on a same antenna port(s), the second demodulation reference signal being generated using a sequence which is initialized based on a value configured via dedicated RRC signalling.

4. The base station of claim 3, wherein

the first physical control channel is a physical control channel which is allocated in common search space.

5. A method for a user equipment (UE) which communicates with a base station in a cell, the method comprising:

receiving a first demodulation reference signal for demodulating EPDCCH; and

monitoring a first physical control channel;

wherein

in a mapping of the first physical control channel, mapping to resource elements is carried out under an assumption that the resource elements include resource elements for channel state information reference signal;

receiving a cell-specific reference signal and a second demodulation reference signal for demodulating EPDCCH,

monitoring a second physical control channel,

the second demodulation reference signal and the second physical control channel being transmitted on a same antenna port(s),

the first physical control channel is a physical control channel with CRC scrambled by P-RNTI which is an identity for paging, the first demodulation reference signal and the first physical control channel being transmitted on a same antenna port(s), the first demodulation reference signal being generated using a sequence which is initialized based on a cell identity of the cell, and

the second physical control channel is a physical control channel with CRC scrambled by C-RNTI which is an identity specific to the UE, the second demodulation reference signal and the second physical control channel being transmitted on a same antenna port(s), the second demodulation reference signal being generated using a sequence which is initialized based on a value configured via dedicated RRC signalling.

6. A method for a base station which communicates with a user equipment (UE) in a cell, the method comprising:

generating a first demodulation reference signal using a sequence which is initialized based on a cell identity of the cell,

transmitting the first demodulation reference signal for demodulating EPDCCH; and

generating a first physical control channel;

wherein

in a mapping of the first physical control channel, mapping to resource elements is carried out under an assumption that the resource elements include resource elements for channel state information reference signal;

generating a second demodulation reference signal using a sequence which is initialized based on a value configured via dedicated RRC signalling

transmitting a cell-specific reference signal and the second demodulation reference signal for demodulating EPDCCH, and

generating a second physical control channel,

the first physical control channel is a physical control channel with CRC scrambled by P-RNTI which is an identity for paging, the first demodulation reference signal and the first physical control channel being transmitted on a same antenna port(s), the first demodulation reference signal being generated using a sequence which is initialized based on a cell identity of the cell, and

the second physical control channel is a physical control channel with CRC scrambled by C-RNTI which is an identity specific to the UE, the second demodulation reference signal and the second physical control channel being transmitted on a same antenna port(s), the second demodulation reference signal being generated using a sequence which is initialized based on a value configured via dedicated RRC signalling.