TRANSMITTER APPARATUS, RECEIVER APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

• US 20120106610A1
• Filed: 05/31/2010
• Published: 05/03/2012
• Est. Priority Date: 06/16/2009
• 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, Shimezawa, Kazuyuki, Yamada, Shohei, Oh, Wahoh
• Granted Patent: US 8,774,290 B2
• Time in Patent Office: Days
• US Class Current: 375/224
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 2001/0092 Error control systems characterised by the topology of the transmission link
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• 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 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• 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: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A transmitter apparatus includes a reference signal transmitting unit that transmits a both of a first reference signal and a second reference signal differing from the first reference signal to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively. In addition, the transmitter apparatus includes a notifying unit that instructs the first receiver apparatus to measure the first reference signal and that instructs the second receiver apparatus to measure the second reference signal.

Claims

1. A transmitter apparatus comprising:

a reference signal transmitting unit that transmits a both of a first reference signal and a second reference signal differing from the first reference signal to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively; and

a notifying unit that instructs the first receiver apparatus to measure the first reference signal and that instructs the second receiver apparatus to measure the second reference signal.

2. The transmitter apparatus according to claim 1, further comprising a first mapping unit that maps the first reference signal and the second reference signal onto different resources.

3. The transmitter apparatus according to claim 2, wherein the first mapping unit uses the same stream as the first reference signal and the second reference signal.

4. The transmitter apparatus according to claim 1, further comprising a second mapping unit that places the first reference signal and the second reference signal onto different subframes.

5. A transmitter apparatus comprising:

a reference signal transmitting unit that transmits a both of a first reference signal and a second reference signal differing from the first reference signal to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively; and

a notifying unit that notifies of information specifying a position of the first reference signal to the first receiver apparatus, and that notifies of information specifying a position of the second reference signal to the second receiver apparatus.

6. A receiver apparatus comprising:

a first reference signal measuring unit that measures a first reference signal based on the instruction of measurement of the first reference signal from a transmitter apparatus performing communication by switching between non-cooperative communication and cooperative communication; and

a second reference signal measuring unit that measures a second reference signal differing from the first reference signal based on the instruction of measurement of the second reference signal from the transmitter apparatus.

7. The receiver apparatus according to claim 6 further comprising:

a first feedback information generating unit that generates first feedback information using a measurement result of the first reference signal; and

a second feedback information generating unit that generates second feedback information differing from the first feedback information using a measurement result of the second reference signal.

8. A communication system comprising a transmitter apparatus and a first and second receiver apparatuses, wherein

the transmitter apparatus comprises:

a reference signal transmitting unit that transmits both of a first reference signal and a second reference signal differing from the first reference signal to the first receiver apparatus performing non-cooperative communication and to the second receiver apparatus performing cooperative communication, respectively; and

a notifying unit that instructs the first receiver apparatus to measure the first reference signal and that instructs the second receiver apparatus to measure the second reference signal; and

wherein

the first receiver apparatus comprises;

a first reference signal measuring unit that measures the first reference signal; and

the second receiver apparatus comprises;

a second reference signal measuring unit that measures the second reference signal.

9. A communication system comprising a transmitter apparatus and a receiver apparatus, wherein

the transmitter apparatus comprises:

a reference signal transmitting unit that transmits a first reference signal and a second reference signal differing from the first reference signal to the receiver apparatus performing communication by switching between non-cooperative communication and cooperative communication; and

a notifying unit that instructs the receiver apparatus to measure the first reference signal or to measure the second reference signal; and

wherein

the receiver apparatus comprises;

a first reference signal measuring unit that measures the first reference signal based on the instruction to measure the first reference signal from the transmitter apparatus; and

a second reference signal measuring unit that measures the second reference signal based on the instruction to measure the second reference signal from the transmitter apparatus.

10. A communication method for transmitting the both of a first reference signal and a second reference signal differing from the first reference signal from a transmitter apparatus to a first receiver apparatus performing non-cooperative communication and to a second receiver apparatus performing cooperative communication, respectively, wherein

the transmitter apparatus instructs the first receiver apparatus to measure the first reference signal;

and

the transmitter apparatus instructs the second receiver apparatus to measure the second reference signal.

11. A communication method, wherein

a receiver apparatus measures a first reference signal based on the instruction to measure the first reference signal from a transmitter apparatus performing communication by switching between non-cooperative communication and cooperative communication;

and

the receiver apparatus measures a second reference signal differing from the first reference signal based on the instruction to measure the second reference signal from the transmitter apparatus.