Discovery preamble content for a device discovery procedure

Patent metadata

Field	Value
Publication number	US-11310651-B2
Application number	US-202017067195-A
Country	US
Kind code	B2
Filing date	Oct 9, 2020
Priority date	Feb 13, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

Techniques are described for performing beam sweep procedures as part of a device discovery procedure. A communication device may receive a discovery preamble as part of a device discovery procedure. The discovery preamble may include information indicating that a discovery message will be transmitted. The communication device may determine whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble. The communication device may monitor for the discovery message based at least in part on the determination.

First claim

What is claimed is:

1. A method for wireless communication, comprising:
receiving a discovery preamble as part of a device discovery procedure, wherein the discovery preamble includes information indicating that a discovery message will be transmitted;
determining whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble;
identifying a beam configuration of the discovery message based at least in part on receiving the discovery preamble; and
monitoring for the discovery message based at least in part on the determination, wherein monitoring for the discovery message is based at least in part on identifying the beam configuration.

2. The method of claim 1 , further comprising:
identifying one or more characteristics of the discovery message based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the one or more characteristics of the discovery message.

3. The method of claim 1 , further comprising:
identifying a preamble identifier based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the preamble identifier.

4. The method of claim 1 , further comprising:
identifying a discovery mode of a transmitting device based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the discovery mode.

5. The method of claim 4 , wherein the discovery mode is based at least in part on one or more of whether the transmitting device is requesting information, the transmitting device is offering to share information, or a type of information requested or offered.

6. The method of claim 1 , further comprising:
identifying a communication resource or a configuration for communicating the discovery message based at least in part on receiving the discovery preamble, wherein monitoring for the discovery message is based at least in part on identifying the communication resource or the configuration.

7. The method of claim 1 , further comprising:
identifying a beam sweep index of a plurality of beams that carries the discovery preamble based at least in part on receiving the discovery preamble, wherein monitoring for the discovery message is based at least in part on identifying the beam sweep index of the discovery preamble.

8. The method of claim 7 , wherein the beam sweep index includes one or more of a beam sweeping periodicity, a number of discovery signals transmitted within a period, a resource pattern within the period, a quasi-collocation assumption between different signals, or whether some signals are repeated.

9. The method of claim 1 , wherein the discovery preamble includes one or more of a preamble identifier, a discovery mode identifier, a beam configuration identifier, a communication resource identifier, a configuration identifier, or a beam sweep index identifier.

10. The method of claim 1 , further comprising:
receiving the discovery message based at least in part on monitoring for the discovery message; and
establishing a device-to-device (D2D) communication link in a vehicle-to-everything (V2X) communication network based at least in part on receiving the discovery message.

11. The method of claim 1 , further comprising:
transmitting a message in response to receiving the discovery preamble, wherein the discovery message is received based at least in part on transmitting the message.

12. The method of claim 1 , wherein the discovery message includes one or more of information related to a random access channel (RACH) procedure to establish a communication link between two devices, an identifier of a transmitting device, or sensor information.

13. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receive a discovery preamble as part of a device discovery procedure, wherein the discovery preamble includes information indicating that a discovery message will be transmitted;
determine whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble;
identifying a beam configuration of the discovery message based at least in part on receiving the discovery preamble; and
monitor for the discovery message based at least in part on the determination, wherein monitoring for the discovery message is based at least in part on identifying the beam configuration.

14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify one or more characteristics of the discovery message based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the one or more characteristics of the discovery message.

15. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a preamble identifier based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the preamble identifier.

16. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a discovery mode of a transmitting device based at least in part on receiving the discovery preamble, wherein determining whether to monitor for the discovery message is based at least in part on identifying the discovery mode.

17. The apparatus of claim 16 , wherein the discovery mode is based at least in part on one or more of whether the transmitting device is requesting information, the transmitting device is offering to share information, or a type of information requested or offered.

18. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a communication resource or a configuration for communicating the discovery message based at least in part on receiving the discovery preamble, wherein monitoring for the discovery message is based at least in part on identifying the communication resource or the configuration.

19. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a beam sweep index of a plurality of beams that carries the discovery preamble based at least in part on receiving the discovery preamble, wherein monitoring for the discovery message is based at least in part on identifying the beam sweep index of the discovery preamble.

20. The apparatus of claim 19 , wherein the beam sweep index includes one or more of a beam sweeping periodicity, a number of discovery signals transmitted within a period, a resource pattern within the period, a quasi-collocation assumption between different signals, or whether some signals are repeated.

21. The apparatus of claim 13 , wherein the discovery preamble includes one or more of a preamble identifier, a discovery mode identifier, a beam configuration identifier, a communication resource identifier, a configuration

Assignees

• Qualcomm Inc
• Holland & Hart LLP

Inventors

• Abedini Navid
• Wu Zhibin
• Li Junyi
• Baghel Sudhir Kumar
• Gulati Kapil
• Jiang Libin

Classifications

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04L5/0087

  when data requirements change · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title