Resources for monitoring an EPDCCH depending on transmission mode

• US 9,560,643 B2
• Filed: 07/25/2012
• Issued: 01/31/2017
• Est. Priority Date: 07/29/2011
• 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, Imamura, Kimihiko, Nakashima, Daiichiro, Aiba, Tatsushi
• Primary Examiner(s): Van Roie, Justin T
• Application Number:
  US14/235,581
• Publication Number:
  US 20140169328A1
• Time in Patent Office: 1,651 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04J 13/0074 Code shifting or hopping
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• 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: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A base station is configured to communicate with a terminal using a resource element configured of an area in the frequency direction and an area in the temporal direction, and a resource block pair configured of a predetermined number of the resource elements. The base station includes: a second control channel generating unit configured to generate a second control channel which can be mapped to a second control channel area which is an area different from a first control channel area where a first control channel can be mapped, and which is set to the terminal from the base station in units of the resource block pair. A resource element group which is a group of the predetermined resource elements in the resource block pair of the second control channel area is configured, and the second control channel is mapped to a plurality of the resource element groups.

Claims

1. A base station apparatus configured to communicate with a terminal apparatus, the base station apparatus comprising:

a higher layer processor configured or programmed to configure a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and

a transmitter configured to transmit the enhanced physical downlink control channel using one or more resources;

wherein

the resource block set includes a plurality of resource block pairs;

each of the plurality of resource block pairs includes numbered resource element groups;

the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;

for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;

for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and

N and M have equal integer values.

2. The base station apparatus according to claim 1, wherein each of the numbered resource element groups is constituted by resource elements having a resource element group number.

3. The base station apparatus according to claim 1, wherein the enhanced physical downlink control channel is transmitted using a resource element to which at least a cell-specific reference signal or a channel state information reference signal is not mapped.

4. The base station apparatus according to claim 1, wherein the enhanced physical downlink control channel is transmitted using an OFDM symbol different from an OFDM symbol to be used for transmission of a physical downlink control channel.

5. The base station apparatus according to claim 1, wherein the enhanced physical downlink control channel is transmitted using a second antenna port different from a first antenna port to be used for transmission of a physical downlink control channel;

and wherein the first antenna port is an antenna port to be used for transmission of a cell-specific reference signal, and the second antenna port is an antenna port to be used for transmission of a demodulation reference signal.

6. A terminal apparatus configured to communicate with a base station apparatus, the terminal apparatus comprising:

a higher layer processor configured or programmed to configure a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and

a control channel processor configured or programmed to monitor a candidate of the enhanced physical downlink control channel on one or more resources;

wherein

the resource block set includes a plurality of resource block pairs;

each of the plurality of resource block pairs includes numbered resource element groups;

the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;

for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;

for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and

N and M have equal integer values.

7. The terminal apparatus according to claim 6, wherein each of the numbered resource element groups is constituted by resource elements having a resource element group number.

8. The terminal apparatus according to claim 6, wherein the enhanced physical downlink control channel is transmitted using a resource element to which at least a cell-specific reference signal or a channel state information reference signal is not mapped.

9. The terminal apparatus according to claim 6, wherein the enhanced physical downlink control channel is transmitted using an OFDM symbol different from an OFDM symbol to be used for transmission of a physical downlink control channel.

10. The terminal apparatus according to claim 6, wherein the enhanced physical downlink control channel is transmitted using a second antenna port different from a first antenna port to be used for transmission of a physical downlink control channel;

and wherein the first antenna port is an antenna port to be used for transmission of a cell-specific reference signal, and the second antenna port is an antenna port to be used for transmission of a demodulation reference signal.

11. A communication method of a base station apparatus configured to communicate with a terminal apparatus, the method comprising:

a step for configuring a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and

a step for transmitting the enhanced physical downlink control channel using one or more resources;

wherein

the resource block set includes a plurality of resource block pairs;

each of the plurality of resource block pairs includes numbered resource element groups;

the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;

for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair of the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;

for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and

N and M have equal integer values.

12. A communication method of a terminal apparatus configured to communicate with a base station apparatus, the method comprising:

a step for a resource block set for the terminal apparatus to monitor an enhanced physical downlink control channel; and

a step for monitoring a candidate of the enhanced physical downlink control channel on one or more resources;

wherein

the resource block set includes a plurality of resource block pairs;

each of the plurality of resource block pairs includes numbered resource element groups;

the enhanced physical downlink control channel is transmitted using either a first transmission or a second transmission on a basis of information configured by a higher layer;

for the first transmission, each of the one or more resources consists of N resource element groups in a single resource block pair within the plurality of resource block pairs, each of the N resource element groups being one of the numbered resource element groups;

for the second transmission, each of the one or more resources consists of M resource element groups in more than one resource block pair within the plurality of resource block pairs, each of the M resource element groups being one of the numbered resource element groups; and

N and M have equal integer values.