System and method for determining a pilot signal

• US 11,018,829 B2
• Filed: 07/05/2019
• Issued: 05/25/2021
• Est. Priority Date: 03/13/2013
• 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: Yi, Zhihang, Ma, Jianglei, Zhang, Liqing, Au, Kelvin Kar Kin
• Primary Examiner(s): Banks Harold, Marsha D
• Assistant Examiner(s): Patel, Dharmesh J
• Application Number:
  US16/503,731
• Publication Number:
  US 20190334679A1
• Time in Patent Office: 690 Days
• 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 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

A method of configuring a pilot signal includes defining a first pilot signal arrangement and defining a second pilot signal arrangement. Also, the method includes determining, by a communications controller, a first determined pilot signal arrangement in accordance with the first defined pilot signal arrangement, the second defined pilot signal arrangement, and a set of characteristics and transmitting, by the communications controller, the pilot signal having the first determined pilot signal arrangement.

Claims

1. A method of transmitting a pilot signal, the method comprising:

transmitting, by a transmitter, a signal indicating a first time domain pilot density arrangement of multiple time domain pilot density arrangements, the multiple time domain pilot density arrangements further including a second time domain pilot density arrangement different from the first time domain pilot density arrangement, the first time domain pilot density arrangement associated with a first transmission time interval (TTI) length, the second time domain pilot density arrangement associated with a second TTI length, and the first TTI length and the second TTI length being different from each other.

2. The method of claim 1, wherein the first TTI length is equal to a first number of symbols and the second TTI length is equal to a second number of symbols.

3. The method of claim 2, wherein the first TTI length is equal to 14 symbols and the first time domain pilot density arrangement includes 4 pilot symbols per TTI.

4. The method of claim 1, further comprising:

upon transmitting the signal, transmitting, by the transmitter, the pilot signal based on the first time domain pilot density arrangement.

5. The method of claim 4, wherein the pilot signal is a demodulation reference signal (DMRS).

6. The method of claim 1, wherein:

the multiple time domain pilot density arrangements further include a third time domain pilot density arrangement associated with a third TTI length that is equal to a third number of symbols;

the first time domain pilot density arrangement, the second time domain pilot density arrangement, and the third time domain pilot density arrangement are different from each other; and

the first TTI length, the second TTI length, and the third TTI length are different from each other.

7. The method of claim 1, wherein the first time domain pilot density arrangement is determined in accordance with a set of characteristics.

8. The method of claim 7, wherein the set of characteristics include a first subset of characteristics and a second subset of characteristics, the first subset of characteristics including a network or environmental characteristic, and the second subset of characteristics including an environmental or user equipment characteristic.

9. The method of claim 8, wherein the environmental characteristic includes a channel delay spread characteristic.

10. A method of receiving a pilot signal, the method comprising:

receiving, by an apparatus, a signal indicating a first time domain pilot density arrangement of multiple time domain pilot density arrangements, the multiple time domain pilot density arrangements further including a second time domain pilot density arrangement different from the first time domain pilot density arrangement, the first time domain pilot density arrangement associated with a first transmission time interval (TTI) length, the second time domain pilot density arrangement associated with a second TTI length, and the first TTI length and the second TTI length being different from each other.

11. The method of claim 10, wherein the first TTI length is equal to a first number of symbols and the second TTI length is equal to a second number of symbols.

12. The method of claim 11, wherein the first TTI length is equal to 14 symbols and the first time domain pilot density arrangement includes 4 pilot symbols per TTI.

13. The method of claim 10, further comprising:

after receiving the signal, receiving, by the apparatus, the pilot signal based on the first time domain pilot density arrangement.

14. The method of claim 13, wherein the pilot signal is a demodulation reference signal (DMRS).

15. The method of claim 10, wherein:

the multiple time domain pilot density arrangements further include a third time domain pilot density arrangement associated with a third TTI length that is equal to a third number of symbols;

the first time domain pilot density arrangement, the second time domain pilot density arrangement, and the third time domain pilot density arrangement are different from each other; and

the first TTI length, the second TTI length, and the third TTI length are different from each other.

16. The method of claim 10, wherein first time domain pilot density arrangement is determined in accordance with a set of characteristics.

17. The method of claim 16, wherein the set of characteristics include a first subset of characteristics and a second subset of characteristics, the first subset of characteristics including a network or environmental characteristic, and the second subset of characteristics including an environmental or user equipment characteristic.

18. The method of claim 17, wherein the environmental characteristic includes a channel delay spread characteristic.

19. A transmitter comprising:

a memory storage comprising instructions; and

a processor in communication with the memory storage, wherein the processor executes the instructions to;

transmit a signal indicating a first time domain pilot density arrangement of multiple time domain pilot density arrangements, the multiple time domain pilot density arrangements further including a second time domain pilot density arrangement different from the first time domain pilot density arrangement, the first time domain pilot density arrangement associated with a first transmission time interval (TTI) length, the second time domain pilot density arrangement associated with a second TTI length, and the first TTI length and the second TTI length being different from each other.

20. The transmitter of claim 19, wherein the processor executes the instructions to:

upon transmitting the signal, transmit a pilot signal based on the first time domain pilot density arrangement, the pilot signal being a demodulation reference signal (DMRS).

21. An apparatus comprising:

a memory storage comprising instructions; and

a processor in communication with the memory storage, wherein the processor executes the instructions to;

receive a signal indicating a first time domain pilot density arrangement of multiple time domain pilot density arrangements in a time domain, the multiple time domain pilot density arrangements further including a second time domain pilot density arrangement different from the first time domain pilot density arrangement, the first time domain pilot density arrangement associated with a first transmission time interval (TTI) length, the second time domain pilot density arrangement associated with a second TTI length, and the first TTI length and the second TTI length being different from each other.

22. The apparatus of claim 21, wherein the first TTI length is equal to 14 symbols and the first time domain pilot density arrangement includes 4 pilot symbols per TTI.