Beam sweeping on millimeter wave frequencies for device-to-device communications

A method for wireless communication performed at a first user equipment (UE), comprising:

• receiving, from a second UE, one or more parameters over a signaling radio bearer (SRB) established on a sidelink with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• beam sweeping one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the SRB on the sidelink with the second UE on the first frequency band;
• and
• receiving a physical random access channel (PRACH) preamble from the second UE on a transmit beam over the second frequency band to permit the second UE to communicate with the first UE over a data radio bearer (DRB) established on a sidelink with the second UE on the second frequency band.

A method for wireless communication performed at a first user equipment (UE), comprising:

• receiving, from a second UE, one or more parameters over a signaling radio bearer (SRB) established on a sidelink with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• beam sweeping one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the SRB on the sidelink with the second UE on the first frequency band;
• and
• transmitting physical layer, medium access control (MAC) layer, and other access layer control information for the second frequency band to the second UE over the first frequency band, and only data flows to the second UE over a data radio bearer (DRB) established between the first UE and the second UE on the second frequency band.

A first user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory, the at least one processor configured to:
• receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the sidelink on the first frequency band;
• and
• receive a physical random access channel (PRACH) preamble from the second UE on a transmit beam over the second frequency band to permit the second UE to communicate with the first UE over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band.

A first user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory, the at least one processor configured to:
• receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• and
• beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE in response to reception of a request to perform the beam sweeping from the second UE, wherein the direction is based on the location of the second UE received over the sidelink on the first frequency band, and wherein the request is received over a signaling radio bearer (SRB) on the sidelink between the first UE and the second UE established on the first frequency band.

A first user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory, the at least one processor configured to:
• receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• and
• beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the sidelink on the first frequency band,
• wherein the one or more parameters further include at least one of a geographic location of the first UE, a geographic location of the second UE, a path of the first UE, a path of the second UE, a given quality of service (QoS) requirement for a data flow over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band, directions of the one or more transmit beams, a periodicity of the one or more transmit beams, a frequency of the one or more transmit beams, or a beam response and physical random access channel (PRACH) combination of the one or more transmit beams.

A first user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory, the at least one processor configured to:
• receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the sidelink on the first frequency band;
• and
• transmit physical layer, medium access control (MAC) layer, and other access layer control information for the second frequency band to the second UE over the sidelink between the first UE and the second UE on the first frequency band, and only data flows to the second UE over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band.

A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable instructions comprising:

• at least one instruction instructing a first user equipment (UE) to receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• at least one instruction instructing the first UE to beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the sidelink on the first frequency band;
• and
• at least one instruction instructing the first UE to receive a physical random access channel (PRACH) preamble from the second UE on a transmit beam over the second frequency band to permit the second UE to communicate with the first UE over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band.

A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable instructions comprising:

• at least one instruction instructing a first user equipment (UE) to receive, from a second UE, over a sidelink between the first UE and the second UE, one or more parameters during a sidelink discovery procedure performed with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• at least one instruction instructing the first UE to beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the sidelink between the first UE and the second UE on the first frequency band;
• and
• at least one instruction instructing the first UE to transmit physical layer, medium access control (MAC) layer, and other access layer control information for the second frequency band to the second UE over the sidelink between the first UE and the second UE on the first frequency band, and only data flows to the second UE over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band.

A first user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory, the least one processor configured to:
• receive, from a second UE, one or more parameters over a signaling radio bearer (SRB) established on a sidelink with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the SRB on the sidelink with the second UE on the first frequency band;
• and
• receive a physical random access channel (PRACH) preamble from the second UE on a transmit beam over the second frequency band to permit the second UE to communicate with the first UE over a data radio bearer (DRB) established on a sidelink with the second UE on the second frequency band.

A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable instructions comprising:

• at least one instruction instructing a first user equipment (UE) to receive, from a second UE, one or more parameters over a signaling radio bearer (SRB) established on a sidelink with the second UE on a first frequency band, the one or more parameters including a location of the second UE;
• at least one instruction instructing the first UE to beam sweep one or more transmit beams of a plurality of transmit beams on a second frequency band in a direction of the second UE, wherein the direction is based on the location of the second UE received over the SRB on the sidelink with the second UE on the first frequency band;
• and
• at least one instruction instructing the first UE to receive a physical random access channel (PRACH) preamble from the second UE on a transmit beam over the second frequency band to permit the second UE to communicate with the first UE over a data radio bearer (DRB) established on a sidelink between the first UE and the second UE on the second frequency band.