Method and Apparatus for Transmitting Reference Signal in Device-to-Device (D2D) Communication

• US 20150180631A1
• Filed: 03/05/2015
• Published: 06/25/2015
• Est. Priority Date: 09/06/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Xingwei
• Granted Patent: US 10,630,439 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• 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: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

A method and an apparatus for transmitting information in device-to-device (D2D) communication are provided, where the method includes determining, by a first user equipment, in a communication resource for D2D communication, a target resource used to bear a reference signal (RS), where the target resource is according to characteristic information used in selecting the target resource, and the characteristic information used in selecting the target resource includes at least one of the following two items: characteristic information used to uniquely identify the first user equipment, and characteristic information used to uniquely identify a second user equipment that performs D2D communication with the first user equipment; and transmitting, by the first user equipment, the RS to the second user equipment using the target resource.

Claims

1. A method for transmitting a reference signal in device-to-device (D2D) communication, the method comprising:

determining, by a first user equipment, in a communication resource for D2D communication, a target resource used to bear a reference signal (RS), wherein the target resource corresponds to characteristic information used in selecting the target resource, and wherein the characteristic information used in selecting the target resource comprises at least one of the following;

characteristic information used to uniquely identify the first user equipment, and characteristic information used to uniquely identify a second user equipment that performs D2D communication with the first user equipment; and

transmitting, by the first user equipment, the RS to the second user equipment using the target resource.

2. The method according to claim 1, wherein determining, by the first user equipment, in the communication resource for D2D communication, the target resource used to bear the RS comprises selecting, by the first user equipment, the target resource from the communication resource according to the characteristic information used in selecting the target resource, and wherein, before the transmitting, by the first user equipment, the RS to the second user equipment using the target resource, the method further comprises sending first information to the second user equipment, wherein the first information is used to indicate the characteristic information used in selecting the target resource by the first user equipment, so that the second user equipment determines the target resource according to the first information.

3. The method according to claim 1, wherein determining, by the first user equipment, in the communication resource for D2D communication, the target resource used to bear the RS comprises selecting, by the first user equipment, the target resource from the communication resource according to the characteristic information used in selecting the target resource, and wherein, before the transmitting, by the first user equipment, the RS to the second user equipment using the target resource, the method further comprises sending second information to the second user equipment, wherein the second information is used to indicate the target resource, so that the second user equipment determines the target resource according to the second information.

4. The method according to claim 3, wherein selecting, by the first user equipment, the target resource from the communication resource according to the characteristic information used in selecting the target resource comprises:

selecting, by the first user equipment, a target pattern from at least two preset patterns according to the characteristic information used in selecting the target resource, wherein each pattern is used to indicate a resource that is in the communication resource and used to bear an RS; and

using a resource indicated by the target pattern and used to bear an RS as the target resource, wherein the second information is used to indicate the target pattern.

5. The method according to claim 3, wherein selecting, by the first user equipment, the target resource from the communication resource according to the characteristic information used in selecting the target resource comprises:

determining, by the first user equipment, a configured value according to the characteristic information used in selecting the target resource, wherein the configured value is used to indicate a location of the target resource in a preset pattern; and

determining the target resource according to the configured value and the pattern, wherein the second information is used to indicate the configured value.

6. The method according to claim 1, wherein the target resource comprises at least one of a time domain resource, a frequency domain resource, a space domain resource, and a code domain resource.

7. A method for transmitting a reference signal in device-to-device (D2D) communication, wherein the method comprises:

acquiring characteristic information used in selecting a target resource, wherein the characteristic information used in selecting the target resource comprises at least one of the following;

characteristic information used to uniquely identify a first user equipment, and characteristic information used to uniquely identify a second user equipment that performs D2D communication with the first user equipment;

selecting, from a communication resource for D2D communication according to the characteristic information used in selecting the target resource, the target resource used to bear a reference signal (RS); and

sending fifth information to at least one user equipment of the first user equipment and the second user equipment, wherein the fifth information is used to indicate the characteristic information used in selecting the target resource, so that the at least one user equipment determines, according to the fifth information, the target resource used to bear the RS;

or

sending sixth indication information to the at least one user equipment, wherein the sixth information is used to indicate the target resource, so that the at least one user equipment determines, according to the sixth information, the target resource used to bear the RS.

8. The method according to claim 7, wherein selecting, from the communication resource for the D2D communication according to the characteristic information used in selecting the target resource, the target resource used to bear the RS comprises:

selecting a target pattern from at least two preset patterns according to the characteristic information used in selecting the target resource, wherein each pattern is used to indicate a resource that is in the communication resource and used to bear an RS; and

using a resource indicated by the target pattern and used to bear an RS as the target resource, wherein the sixth information is used to indicate the target pattern.

9. The method according to claim 7, wherein selecting, from the communication resource for the D2D communication according to the characteristic information used in selecting the target resource, the target resource used to bear the RS comprises:

determining a configured value according to the characteristic information used in selecting the target resource, wherein the configured value is used to indicate a location of the target resource in a preset pattern; and

determining the target resource according to the configured value and the pattern, wherein the sixth information is used to indicate the configured value.

10. The method according to claim 7, wherein the target resource comprises at least one of a time domain resource, a frequency domain resource, a space domain resource, and a code domain resource.

11. An apparatus for transmitting a reference signal comprising:

a processing unit configured to enable a first user equipment to determine, from a communication resource for D2D communication, a target resource used to bear a reference signal (RS); and

control a receiving unit and a sending unit to transmit the RS using the target resource, wherein the target resource corresponds to characteristic information used in selecting the target resource, wherein the characteristic information used in selecting the target resource comprises at least one of the following two items;

characteristic information used to uniquely identify the first user equipment, and wherein characteristic information used to uniquely identify a second user equipment that performs D2D communication with the first user equipment;

the receiving unit configured to receive the RS; and

the sending unit configured to send the RS.

12. The apparatus according to claim 11, wherein the processing unit is configured to select the target resource from the communication resource according to the characteristic information used in selecting the target resource, and wherein the sending unit is further configured to send first information to the second user equipment, wherein the first information is used to indicate the characteristic information used in selecting the target resource by the first user equipment, so that the second user equipment determines the target resource according to the first information.

13. The apparatus according to claim 11, wherein the processing unit is configured to select the target resource from the communication resource according to the characteristic information used in selecting the target resource, and wherein the sending unit is further configured to send second information to the second user equipment, wherein the second information is used to indicate the target resource, so that the second user equipment determines the target resource according to the second information.

14. The apparatus according to claim 13, wherein the processing unit is configured to:

select a target pattern from at least two preset patterns according to the characteristic information used in selecting the target resource, wherein each pattern is used to indicate a resource that is in the communication resource and used to bear an RS; and

use a resource indicated by the target pattern and used to bear an RS as the target resource, wherein the second information is used to indicate the target pattern.

15. The apparatus according to claim 13, wherein the processing unit is configured to:

determine a configured value according to the characteristic information used in selecting the target resource, wherein the configured value is used to indicate a location of the target resource in a preset pattern; and

determine the target resource according to the configured value and the pattern, wherein the second information is used to indicate the configured value.

16. The apparatus according to claim 11, wherein the target resource comprises at least one of a time domain resource, a frequency domain resource, a space domain resource, and a code domain resource.

17. An apparatus for transmitting a reference signal comprising:

an acquiring unit configured to acquire characteristic information used in selecting a target resource, wherein the characteristic information used in selecting the target resource comprises at least one of the following;

characteristic information used to uniquely identify the first user equipment, and characteristic information used to uniquely identify a second user equipment that performs D2D communication with the first user equipment;

a processing unit configured to select, from a communication resource for the D2D communication according to the characteristic information used in selecting the target resource, the target resource used to bear a reference signal (RS); and

a sending unit configured to;

send fifth information to at least one user equipment of the first user equipment and the second user equipment, wherein the fifth information is used to indicate the characteristic information used in selecting the target resource, so that the at least one user equipment determines, according to the fifth information, the target resource used to bear an RS;

or

send sixth indication information to the at least one user equipment, wherein the sixth information is used to indicate the target resource, so that the at least one user equipment determines, according to the sixth information, the target resource used to bear an RS.

18. The apparatus according to claim 17, wherein the processing unit is configured to:

select a target pattern from at least two preset patterns according to the characteristic information used in selecting the target resource, wherein each pattern is used to indicate an RS resource that is in the communication resource and used to bear an RS; and

use an RS resource indicated by the target pattern as the target resource, wherein the sixth information is used to indicate the target pattern.

19. The apparatus according to claim 17, wherein the processing unit is configured to:

determine a configured value according to the characteristic information used in selecting the target resource, wherein the configured value is used to indicate a location of the target resource in the communication resource; and

determine the target resource according to the configured value, wherein the sixth information is used to indicate the configured value.

20. The apparatus according to claim 17, wherein the target resource comprises at least one of a time domain resource, a frequency domain resource, a space domain resource, and a code domain resource.