BASE STATION, TERMINAL, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT

• US 20150304993A1
• Filed: 07/08/2013
• Published: 10/22/2015
• Est. Priority Date: 08/01/2012
• 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: SHIMEZAWA, Kazuyuki, NOGAMI, Toshizo, KUSASHIMA, Naoki, IMAMURA, Kimihiko, NAKASHIMA, Daiichiro
• Granted Patent: US 9,560,644 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

In a wireless communication system in which a base station and a terminal communicate, the base station effectively transmits control information for the terminal.

The base station that communicates with the terminal by using resource elements configured with OFDM symbols and subcarriers, and resource block pairs configured with a predetermined number of resource elements includes a second control channel generation unit that generates a second control channel which is transmitted by using a reference signal of an antenna port different from an antenna port of a first control channel. The second control channel is configured with predetermined E-REGs, and transmitted to the terminal, by using one or more E-CCEs. The resource block pair is configured with a predetermined number of E-REG sets. The E-REG set is configured with a predetermined number of the E-REGs. The E-REG is configured with a predetermined number of resource elements.

Claims

1. A communication system in which a base station device and a terminal device communicate by using a plurality of resource block pairs of which each is configured with a plurality of resource elements of which each is defined in a time domain and a frequency domain,

wherein an enhanced physical control channel used in communication between the base station device and the terminal device is configured with one or more enhanced control channel elements,

wherein the enhanced control channel element is configured with a plurality of enhanced resource element groups,

wherein the enhanced resource element groups are mapped to respective resource elements,

wherein the mapping uses one type of sequence of numbers which are assigned to respective resource elements constituting the resource block pair, and correspond to numbers indicating the enhanced resource element groups,

wherein a distributed mapping in which the respective enhanced control channel elements are mapped to the plurality of resource block pairs, or a localized mapping in which the respective enhanced control channel elements are mapped to the one resource block pair are available,

wherein in the distributed mapping, the enhanced control channel element is mapped by using a different number, which is one of the numbers, for each resource block pair, in each of the plurality of resource block pairs used in transmission of the respective enhanced control channel elements,

wherein in the localized mapping, the enhanced control channel elements are mapped by using the plurality of numbers, in the one resource block pair used in transmission of the respective enhanced control channel elements,

wherein the number used in mapping of the enhanced control channel elements is common in the distributed mapping and the localized mapping,

wherein the base station device generates the enhanced physical control channel based on the mapping, and transmits the enhanced physical control channel to the terminal device, and

wherein the terminal device receives the enhanced physical control channels based on the mapping.

2-5. -5. (canceled)