# US 11,310,651 B2 · Discovery preamble content for a device discovery procedure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,651 B2 - Document ID: US11310651B2 - Status: Granted - Kind: B2 - Application number: 17/067,195 - Filed: 2020-10-09 - Published: 2021-01-28 - Granted: 2022-04-19 - Earliest claimed: 2018-02-13 - Assignees: Holland & Hart LLP - Applicants: QUALCOMM Incorporated - Inventors: Navid Abedini; Zhibin Wu; Junyi Li; Sudhir Kumar Baghel; Kapil Gulati; Libin Jiang - Web page: https://patentgrep.com/patent/US11310651B2 ## CPC - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04B 7/0617: {for beam forming} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 7/088: {using beam selection} - H04J 13/0062: {Zadoff-Chu} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/2607: {Cyclic extensions} - H04L 27/261: {Details of reference signals} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 16/28: using beam steering - H04W 48/10: using broadcasted information - H04W 48/16: Discovering, processing access restriction or access information - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04B 7/0413: MIMO systems - H04L 5/0023: {Time-frequency-space} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0087: {when data requirements change} - H04L 2027/0095: {in a preamble or similar structure} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 4) 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. ### Claim 6 (depends on 1) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 7) 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. ### Claim 9 (depends on 1) 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. ### Claim 10 (depends on 1) 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. ### Claim 11 (depends on 1) 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. ### Claim 12 (depends on 1) 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. ### Claim 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. ### Claim 14 (depends on 13) 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. ### Claim 15 (depends on 13) 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. ### Claim 16 (depends on 13) 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. ### Claim 17 (depends on 16) 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. ### Claim 18 (depends on 13) 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. ### Claim 19 (depends on 13) 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. ### Claim 20 (depends on 19) 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. ### Claim 21 (depends on 13) 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 identifier, or a beam sweep index identifier. ### Claim 22 (depends on 13) The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to: receive the discovery message based at least in part on monitoring for the discovery message; and establish 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. ### Claim 23 (depends on 13) The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to: transmit a message in response to receiving the discovery preamble, wherein the discovery message is received based at least in part on transmitting the message. ### Claim 24 (depends on 13) The apparatus of claim 13, 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. ### Claim 25 An apparatus for wireless communication, comprising: means for 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; means for determining whether to monitor for the discovery message of the device discovery procedure based at least in part on receiving the discovery preamble; means for identifying a beam configuration of the discovery message based at least in part on receiving the discovery preamble; and means for 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. ### Claim 26 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor 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.