Method and apparatus for transmission timing using timing advance in full-duplex systems
Methods and apparatuses for transmission timing using timing advance in full-duplex communication systems. A method for transmitting an uplink (UL) signal or channel associated with a transmission timing procedure includes receiving first information for a first timing advance value associated with a first subset of slots from a set of slots on a cell, second information for a second timing advance value associated with a second subset of slots from the set of slots on the cell, and third information for a condition. The method further includes determining whether the condition is valid for transmission in a slot from the second subset of slots and transmitting the UL signal or channel in the slot based on the first timing advance value when the condition is valid and the second timing advance value when the condition is not valid.
1 . A method for transmitting an uplink (UL) signal or channel associated with a transmission timing procedure by a user equipment (UE), the method comprising:
receiving:
first information for a first timing advance group associated with a first subset of slots from a set of slots on a cell, and
second information for a second timing advance group associated with a second subset of slots from the set of slots on the cell, wherein the first and second timing advance groups are associated with respective timing advance values and timing advance offset values;
identifying a condition, wherein the condition is a slot or symbol type;
determining the slot or symbol type for a slot from the first and second subsets of slots; and
transmitting the UL signal or channel in the slot based on:
a first timing advance value associated with the first timing advance group, when the slot or symbol type is non-subband full duplex (non-SBFD), and
a second timing advance value associated with the second timing advance group, when the slot or symbol type is SBFD.
2 . The method of claim 1 , wherein:
a slot from the first subset of slots does not include time domain resources indicated for reception on the cell, and
a slot from the second subset of slots includes time domain resources indicated for transmission or reception on the cell.
3 . The method of claim 1 , wherein the first or second information are associated with an index value, respectively, to determine the first or second timing advance value.
4 . The method of claim 1 , wherein the first and the second information are received using a media access control-control element (MAC CE).
5 . The method of claim 1 , wherein:
the condition is further based on one of:
a slot or symbol number,
a UL transmission format,
a timer or counter value, or
a priority indicator value; and
the condition is valid when:
the slot or symbol number is comprised in the first subset of slots,
the slot or symbol number is not comprised in the first subset of slots,
the slot or symbol type is one of a downlink (DL) type, a flexible (F) type, or an UL type,
the timer or counter value is less than or greater than a configured value, or
the priority indicator value is less than or greater than a configured value.
6 . The method of claim 1 , further comprising:
determining the first timing advance value for a first slot from the first subset of slots based on the second timing advance value for a second slot from the second subset of slots and a value received in the first information; and
using the first timing advance value for the first slot from the first subset of slots.
7 . The method of claim 1 , further comprising:
determining a transmission timing for transmitting the UL signal or channel on another cell using the first timing advance value associated with the first subset of slots from the set of slots on the cell; or
determining the transmission timing transmitting the UL signal or channel on another cell using the second timing advance value associated with the second subset of slots from the set of slots on the cell.
8 . A user equipment (UE) comprising:
a transceiver configured to receive:
first information for a first timing advance group associated with a first subset of slots from a set of slots on a cell, and
second information for a second timing advance group associated with a second subset of slots from the set of slots on the cell, wherein the first and second timing advance groups are associated with respective timing advance values and timing advance offset values; and
a processor operably coupled to the transceiver, the processor configured to:
identify a condition, wherein the condition is a slot or symbol type, and
determine the slot or symbol type for a slot from the first and second subsets of slots,
wherein the transceiver is further configured to transmit an uplink (UL) signal or channel in the slot based on:
a first timing advance value associated with the first timing advance group, when the slot or symbol type is non-subband full duplex (non-SBFD), and
a second timing advance value associated with the second timing advance group, when the slot or symbol type is SBFD.
9 . The UE of claim 8 , wherein:
a slot from the first subset of slots does not include time domain resources indicated for reception on the cell, and
a slot from the second subset of slots includes time domain resources indicated for transmission or reception on the cell.
10 . The UE of claim 8 , wherein the first or second information are associated with an index value, respectively, to determine the first or second timing advance value.
11 . The UE of claim 8 , wherein the first and the second information are received using a media access control-control element (MAC CE).
12 . The UE of claim 8 , wherein:
the condition is further based on one of:
a slot or symbol number,
a UL transmission format,
a timer or counter value, or
a priority indicator value; and
the condition is valid when:
the slot or symbol number is comprised in the first subset of slots,
the slot or symbol number is not comprised in the first subset of slots,
the slot or symbol type is one of a downlink (DL) type, a flexible (F) type, or an UL type,
the timer or counter value is less than or greater than a configured value, or
the priority indicator value is less than or greater than a configured value.
13 . The UE of claim 8 , wherein the processor is further configured to:
determine the first timing advance value for a first slot from the first subset of slots based on the second timing advance value for a second slot from the second subset of slots and a value received in the first information; and
use the first timing advance value for the first slot from the first subset of slots.
14 . The UE of claim 8 , wherein the processor is further configured to:
determine a transmission timing for transmitting the UL signal or channel on another cell using the first timing advance value associated with the first subset of slots from the set of slots on the cell; or
determine the transmission timing transmitting the UL signal or channel on another cell using the second timing advance value associated with the second subset of slots from the set of slots on the cell.
15 . A base station (BS) comprising:
a transceiver configured to transmit:
first information for a first timing advance group associated with a first subset of slots from a set of slots on a cell,
second information for a second timing advance group associated with a second subset of slots from the set of slots on the cell, wherein the first and second timing advance groups are associated with respective timing advance values and timing advance offset values, and
a condition, wherein the condition is a slot or symbol type; and
a processor operably coupled to the transceiver, the processor configured to determine the slot or symbol type for a slot from the first and second subsets of slots,
wherein the transceiver is further configured to receive an uplink (UL) signal or channel in the slot based on:
a first timing advance value associated with the first timing advance group, when the slot or symbol type is non-subband full duplex (non-SBFD), and
a second timing advance value associated with the second timing advance group, when the slot or symbol type is SBFD.
16 . The BS of claim 15 , wherein:
a slot from the first subset of slots does not include time domain resources indicated for reception by a user equipment (UE) on the cell, and
a slot from the second subset of slots includes time domain resources indicated for transmission or reception by the UE on the cell.
17 . The BS of claim 15 , wherein the first or second information are associated with an index value, respectively, to determine the first or second timing advance value.
18 . The BS of claim 15 , wherein the first and the second information are transmitted using a media access control-control element (MAC CE).
19 . The BS of claim 15 , wherein:
the condition is further based on one of:
a slot or symbol number,
a UL transmission format,
a timer or counter value, or
a priority indicator value; and
the condition is valid when:
the slot or symbol number is comprised in the first subset of slots,
the slot or symbol number is not comprised in the first subset of slots,
the slot or symbol type is one of a downlink (DL) type, a flexible (F) type, or an UL type,
the timer or counter value is less than or greater than a configured value, or
the priority indicator value is less than or greater than a configured value.
20 . The BS of claim 15 , wherein the second timing advance value for a second slot from the second subset of slots and a value in the first information indicate the first timing advance value for a first slot from the first subset of slots.