Methods for multi-antenna transmission in vehicular communications

Patent metadata

Field	Value
Publication number	US-11196474-B2
Application number	US-201816492513-A
Country	US
Kind code	B2
Filing date	Mar 21, 2018
Priority date	Mar 24, 2017
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A wireless device configured for transmission using a transmission scheme other than a multi-antenna transmission scheme is provided. The wireless device includes at least one receiver configured to receive a transmission of a multi-antenna transmission scheme, and processing circuitry configured to perform at least one of a channel estimation function and measurement function using the received transmission of the multi-antenna transmission scheme, the multi-antenna transmission scheme remaining transparent to the wireless device.

First claim

The invention claimed is:

1. A wireless device configured for transmission using a transmission scheme other than a multi-antenna transmission scheme, the wireless device comprising:
at least one receiver configured to:
receive a transmission of the multi-antenna transmission scheme; and

processing circuitry configured to:
perform at least one of a channel estimation function and a measurement function using the received transmission of the multi-antenna transmission scheme, the multi-antenna transmission scheme remaining transparent to the wireless device.

2. The wireless device of claim 1 , wherein the transmission of the multi-antenna transmission scheme includes a symbol, the symbol having cyclic delay diversity.

3. The wireless device of claim 2 , wherein the cyclic delay diversity is applied with a cyclic delay, and wherein the cyclic delay is dependent on reference signal bandwidth and channel delay spread.

4. The wireless device of claim 2 , wherein the cyclic delay diversity is applied with a cyclic delay, the cyclic delay causing a transparent reference signal to be exploited and a corresponding channel estimation to remain above a predetermined threshold, and allowing a frequency selectivity to be added.

5. The wireless device of claim 2 , wherein the cyclic delay diversity is applied with a cyclic delay, and wherein the cyclic delay is a Fast Fourier Transform (FFT) size divided with a number of subcarriers used by reference signal within the symbol.

6. The wireless device of claim 1 , wherein the transmission of the multi-antenna transmission scheme includes a symbol, the symbol includes two sequences as part of the multi-antenna transmission scheme.

7. The wireless device of claim 6 , wherein the two sequences correspond to respective parts of an extended Zadoff-Chu sequence.

8. The wireless device of claim 6 , wherein the two sequences include a first sequence and a second sequence, the first sequence having a first length, the second sequence having a second length being one half of the first length.

9. A method of a wireless device configured for transmission using a transmission scheme other than a multi-antenna transmission scheme, the method comprising:
receiving a transmission of the multi-antenna transmission scheme; and
performing at least one of a channel estimation function and a measurement function using the received transmission of the multi-antenna transmission scheme, the multi-antenna transmission scheme remaining transparent to the wireless device.

10. The method of claim 9 , wherein the transmission of the multi-antenna transmission scheme includes a symbol, the symbol having cyclic delay diversity.

11. The method of claim 10 , wherein the cyclic delay diversity is applied with a cyclic delay, and wherein the cyclic delay is dependent on reference signal bandwidth and channel delay spread.

12. The method of claim 10 , wherein the cyclic delay diversity is applied with a cyclic delay, the cyclic delay causing a transparent reference signal to be exploited and a corresponding channel estimation to remain above a predetermined threshold, and allowing a frequency selectivity to be added.

13. The method of claim 10 , wherein the cyclic delay diversity is applied with a cyclic delay, and wherein the cyclic delay is a Fast Fourier Transform (FFT) size divided with a number of subcarriers used by reference signal within the symbol.

14. The method of claim 9 , wherein the transmission of the multi-antenna transmission scheme includes a symbol, the symbol includes two sequences as part of the multi-antenna transmission scheme.

15. The method of claim 14 , wherein the two sequences correspond to respective parts of an extended Zadoff-Chu sequence.

16. The method of claim 9 , wherein the received transmission of the multi-antenna transmission scheme includes a scheduling assignment and data;
the scheduling assignment having a first cyclic delay; and
the data having a second cyclic delay different from the first cyclic delay.

17. The method of claim 9 , wherein the received transmission of the multi-antenna transmission scheme includes a scheduling assignment and data;
the scheduling assignment having a first cyclic delay diversity; and
the data having a second cyclic delay diversity different from the first cyclic delay diversity.

18. The method of claim 9 , wherein the measurement function includes measuring a Physical Sidelink Shared Channel-Reference Signal Received Power, PSSCH-RSRP, based on the received transmission of the multi-antenna transmission scheme.

19. A network node, comprising;
processing circuitry configured to:
determine a transmission scheme for a wireless device, the wireless device configured for a multi-antenna transmission scheme;

transmitter circuitry configured to:
transmit the multi-antenna transmission scheme to the wireless device for transmission by the wireless device;
the transmission of the multi-antenna transmission scheme being usable by another wireless device that is configured for transmission using a transmission scheme other than the multi-antenna transmission scheme, the transmission of the multi-antenna transmission scheme causing the other wireless device to perform at least one of a channel estimation function and a measurement function using the transmission of the multi-antenna transmission scheme, the multi-antenna transmission scheme remaining transparent to the other wireless device.

20. A method for a network node, the method comprising;
determining a transmission scheme for a wireless device, the wireless device configured for a multi-antenna transmission scheme;
transmitting the multi-antenna transmission scheme to the wireless device for transmission by the wireless device;
the transmission of the multi-antenna transmission scheme being usable by another wireless device that is configured for transmission using a transmission scheme other than the multi-antenna transmission scheme, the transmission of the multi-antenna transmission scheme causing the other wireless device to perform at least one of a channel estimation function and a measurement function using the transmission of the multi-antenna transmission scheme, the multi-antenna transmission scheme remaining transparent to the other wireless device.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Sun Wanlu
• Blasco Serrano Ricardo
• Do Hieu
• Sorrentino Stefano

Classifications

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04B7/0689 Primary

  using different transmission schemes, at least one of them being a diversity transmission scheme · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L25/0204

  of multiple channels · CPC title