Beam-specific group delay / frequency lookup table signaling for high-precision multi-round-trip-time

A network entity, comprising:

• a memory;
• at least one network interface;
• and
• at least one processor communicatively coupled to the memory and the network interface, the at least one processor configured to:
• cause the at least one network interface to transmit, to a user equipment (UE), an identification of at least one downlink reference signal resource to enable the UE to receive, from a transmission-reception point (TRP), a first downlink reference signal on the at least one downlink reference signal resource using a downlink receive beam;
• cause the at least one network interface to transmit, to the UE, an identification of at least one uplink reference signal resource to enable the UE to transmit, to the TRP, an uplink reference signal on the at least one uplink reference signal resource using an uplink transmit beam;
• receive, from the UE via the at least one network interface, a parameter representing a difference between a reception time at the UE of the first downlink reference signal and a transmission time of the uplink reference signal from the UE;
• receive, from the UE via the at least one network interface, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam;
• and
• estimate a position of the UE based, in part, on the difference between the reception time of the first downlink reference signal and the transmission time of the uplink reference signal and a group delay for the downlink receive beam and/or the uplink transmit beam retrieved from the first lookup table.

A method of wireless communication performed by a user equipment (UE), comprising:

• receiving, from a transmission-reception point (TRP), a first downlink reference signal on at least one downlink reference signal resource using a downlink receive beam;
• transmitting, to the TRP, an uplink reference signal on at least one uplink reference signal resource using an uplink transmit beam;
• determining a parameter representing a difference between a reception time of the first downlink reference signal and a transmission time of the uplink reference signal;
• transmitting the parameter to a network entity;
• and
• transmitting, to the network entity, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam.

A method of wireless communication performed by a network entity, comprising:

• transmitting, to a user equipment (UE), an identification of at least one downlink reference signal resource to enable the UE to receive, from a transmission-reception point (TRP), a first downlink reference signal on the at least one downlink reference signal resource using a downlink receive beam;
• transmitting, to the UE, an identification of at least one uplink reference signal resource to enable the UE to transmit, to the TRP, an uplink reference signal on the at least one uplink reference signal resource using an uplink transmit beam;
• receiving, from the UE, a parameter representing a difference between a reception time at the UE of the first downlink reference signal and a transmission time of the uplink reference signal from the UE;
• receiving, from the UE, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam;
• and
• estimating a position of the UE based, in part, on the difference between the reception time of the first downlink reference signal and the transmission time of the uplink reference signal and a group delay for the downlink receive beam and/or the uplink transmit beam retrieved from the first lookup table.

A user equipment (UE), comprising:

• means for receiving, from a transmission-reception point (TRP), a first downlink reference signal on at least one downlink reference signal resource using a downlink receive beam;
• means for transmitting, to the TRP, an uplink reference signal on at least one uplink reference signal resource using an uplink transmit beam;
• means for determining a parameter representing a difference between a reception time of the first downlink reference signal and a transmission time of the uplink reference signal;
• means for transmitting the parameter to a positioning entity;
• and
• means for transmitting, to the positioning entity, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam.

A network entity, comprising:

• means for transmitting, to a user equipment (UE), an identification of at least one downlink reference signal resource to enable the UE to receive, from a transmission-reception point (TRP), a first downlink reference signal on the at least one downlink reference signal resource using a downlink receive beam;
• means for transmitting, to the UE, an identification of at least one uplink reference signal resource to enable the UE to transmit, to the TRP, an uplink reference signal on the at least one uplink reference signal resource using an uplink transmit beam;
• means for receiving, from the UE, a parameter representing a difference between a reception time at the UE of the first downlink reference signal and a transmission time of the uplink reference signal from the UE;
• means for receiving, from the UE, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam;
• and
• means for estimating a position of the UE based, in part, on the difference between the reception time of the first downlink reference signal and the transmission time of the uplink reference signal and a group delay for the downlink receive beam and/or the uplink transmit beam retrieved from the first lookup table.

A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a user equipment (UE), cause the UE to:

• receive, from a transmission-reception point (TRP), a first downlink reference signal on at least one downlink reference signal resource using a downlink receive beam;
• transmit, to the TRP, an uplink reference signal on at least one uplink reference signal resource using an uplink transmit beam;
• determine a parameter representing a difference between a reception time of the first downlink reference signal and a transmission time of the uplink reference signal;
• transmit the parameter to a positioning entity;
• and
• transmit, to the positioning entity, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam.

A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a network entity, cause the network entity to:

• transmit, to a user equipment (UE), an identification of at least one downlink reference signal resource to enable the UE to receive, from a transmission-reception point (TRP), a first downlink reference signal on the at least one downlink reference signal resource using a downlink receive beam;
• transmit, to the UE, an identification of at least one uplink reference signal resource to enable the UE to transmit, to the TRP, an uplink reference signal on the at least one uplink reference signal resource using an uplink transmit beam;
• receive, from the UE, a parameter representing a difference between a reception time at the UE of the first downlink reference signal and a transmission time of the uplink reference signal from the UE;
• receive, from the UE, a first lookup table or an identifier of the first lookup table, wherein the first lookup table represents per-frequency group delay information for the downlink receive beam and/or the uplink transmit beam;
• and
• estimate a position of the UE based, in part, on the difference between the reception time of the first downlink reference signal and the transmission time of the uplink reference signal and a group delay for the downlink receive beam and/or the uplink transmit beam retrieved from the first lookup table.