Method for expansively transmitting channel estimation reference signal and method and device for transmitting and receiving channel estimation reference signal using same

• US 9,036,574 B2
• Filed: 04/05/2011
• Issued: 05/19/2015
• Est. Priority Date: 04/09/2010
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: Suh, Sungjin, KWON, Kibum
• Primary Examiner(s): Huq, Obaidul
• Application Number:
  US13/640,011
• Publication Number:
  US 20130039316A1
• Time in Patent Office: 1,505 Days
• Field of Search: 370/241, 370/252, 370/310, 370/328, 370/329, 370/340, 370/341, 370/431, 370/433, 370/437, 370/464, 370/465, 455/403, 455/422.1, 455/462, 455/464
• US Class Current: 370/329
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A method for transmitting control information to expansively transmit a channel estimation reference signal comprises the steps of: allowing a base station to determine not to transmit a channel estimation reference signal through a first frequency band, relative to a first user terminal which was set to transmit the channel estimation reference signal in the first frequency band; generating first control information which instructs a second user terminal to transmit the channel estimation reference signal in said first frequency band; and transmitting a wireless signal including said generated first control information to the second user terminal.

Claims

1. A method of transmitting control information for expansive transmission of a channel estimation reference signal, the method comprising:

determining, by a base station, a first user equipment, which was set to transmit a channel estimation reference signal in a first frequency band, to not transmit a channel estimation reference signal through the first frequency band;

generating first control information instructing a second user equipment to transmit a channel estimation reference signal in the first frequency band; and

transmitting a wireless signal including the generated first control information to the second user equipment.

2. The method as claimed in claim 1, wherein, before the determining step, the method further comprises:

receiving a channel estimation reference signal transmitted by the first user equipment through the first frequency band.

3. The method as claimed in claim 2, wherein, before receiving the channel estimation reference signal, the method further comprises:

transmitting, to the first user equipment, a wireless signal including second control information instructing the first user equipment to transmit an aperiodic channel estimation reference signal in a second frequency band including the first frequency band.

4. The method as claimed in claim 1, wherein, after the determining step, the method further comprises:

generating third control information instructing the first user equipment to not transmit a channel estimation reference signal in the first frequency band, and transmitting, to the first user equipment, a wireless signal including the third control information.

5. The method as claimed in claim 1, wherein, before the determining step, the method further comprises:

receiving, from the first user equipment, an aperiodic channel estimation reference signal transmitted based on one of a one-shot scheme, a demodulation reference signal (DM-RS) scheme, and a burst scheme.

6. The method as claimed in claim 1, wherein the second user equipment was scheduled to transmit a periodic channel estimation reference signal in a second frequency band adjacent to the first frequency band.

7. The method as claimed in claim 6, wherein the first control information includes frequency band location information associated with the first frequency band based on the second frequency band.

8. The method as claimed in claim 1, wherein, after transmitting the wireless signal including the first control information, the method further comprises:

receiving a channel estimation reference signal transmitted by the second user equipment in a second frequency band including the first frequency band.

9. The method as claimed in claim 1, wherein the first frequency band includes one or more frequency bands allocated to one or more user equipments.

10. A method of transmitting a channel estimation reference signal, the method comprising:

receiving, by a user equipment, a wireless signal including first control information from a base station;

extracting, from the control information, information instructing transmission of a channel estimation reference signal through a first frequency band; and

transmitting a channel estimation reference signal in a second frequency band including the first frequency band.

11. The method as claimed in claim 10, wherein, before receiving the wireless signal including the control information, the method further comprises:

receiving a wireless signal including second control information associated with scheduling that instructs transmission of a periodic channel estimation reference signal in a third frequency band adjacent to the first frequency band.

12. The method as claimed in claim 10, wherein the first control information includes frequency band location information associated with the first frequency band based on a third frequency band adjacent to the first frequency band.

13. A device for transmitting control information for expansive transmission of a channel estimation reference signal, the device comprising:

a control information generating unit to determine a first user equipment, which was set to transmit a channel estimation reference signal in a first frequency band, to not transmit a channel estimation reference signal through the first frequency band, and to generate first control information instructing a second user equipment to transmit a channel estimation reference signal in the first frequency band;

a coding unit to generate a wireless signal including the first control information; and

a transceiving unit to transmit the wireless signal to the second user equipment.

14. The device as claimed in claim 13, wherein, before transmitting the wireless signal to the second user equipment, the transceiving unit receives a channel estimation reference signal transmitted by the first user equipment through the first frequency band.

15. The device as claimed in claim 13, wherein, before receiving the channel estimation reference signal, the transceiving unit transmits, to the first user equipment, a wireless signal including second control information instructing the first user equipment to transmit an aperiodic channel estimation reference signal in a second frequency band including the first frequency band.

16. The device as claimed in claim 13, wherein the control information generating unit generates third control information instructing the first user equipment to not transmit a channel estimation reference signal in the first frequency band;

and

the transceiving unit transmits a wireless signal including the third control information to the first user equipment.

17. The device as claimed in claim 13, wherein, before transmitting the wireless signal to the second user equipment, the transceiving unit receives, from the first user equipment, an aperiodic channel estimation reference signal transmitted based on one of a one-shot scheme, a demodulation reference signal (DM-RS) scheme, and a burst scheme.

18. The device as claimed in claim 13, wherein the second user equipment was scheduled to transmit a periodic channel estimation reference signal in a second frequency band adjacent to the first frequency band.

19. The device as claimed in claim 18, wherein the first control information includes frequency band location information associated with the first frequency band based on the second frequency band.

20. The device as claimed in claim 13, wherein the transceiving unit receives a channel estimation reference signal transmitted by the second user equipment in a second frequency band including the first frequency band.

21. The device as claimed in claim 13, wherein the first frequency band includes one or more frequency bands allocated to one or more user equipments.

22. A device for transmitting a channel estimation reference signal, the device comprising:

an indication information extracting unit to extract information instructing transmission of a channel estimation reference signal through a first frequency band, from first control information included in a wireless signal received from a base station;

a channel estimation reference signal generating unit to generate a channel estimation reference signal to be transmitted in a second frequency band including the first frequency band; and

a transceiving unit to receive a wireless signal including the first control information from the base station, and to transmit the channel estimation reference signal.

23. The device as claimed in claim 22, wherein, before receiving the wireless signal including the first control information, the transceiving unit receives a wireless signal including second control information associated with scheduling that instructs transmission of a channel estimation reference signal in a third frequency band adjacent to the first frequency band.

24. The device as claimed in claim 22, wherein the first control information includes frequency band location information associated with the first frequency band, based on a third frequency band adjacent to the first frequency band.