Methods and apparatuses for determining a placement and duration of a transient period of an on/off time mask for uplink transmission
A method in a wireless device is disclosed. The wireless device receives an uplink grant from a network node, the uplink grant scheduling one or more uplink transmissions by the wireless device. The wireless device selects an ON/OFF time mask to use for transmitting the one or more uplink transmissions. The wireless device determines, based on the received uplink grant, an allowed placement of a transient period of the selected ON/OFF time mask and a duration of the transient period to use for the one or more uplink transmissions.
1. A method in a wireless device, comprising:
receiving an uplink grant from a network node, the uplink grant scheduling one or more uplink transmissions by the wireless device, the one or more uplink transmissions comprising a reference symbol, wherein a position of the reference symbol in the one or more uplink transmissions is flexible, and the uplink grant includes an indication of the position of the reference symbol in the one or more uplink transmissions;
determining, based on the received uplink grant, an allowed placement of a transient period of an ON/OFF time mask and a duration of the transient period to use for the one or more uplink transmissions, wherein determining the allowed placement and the duration of the transient period is further based on:
the position of the reference symbol in the one or more uplink transmissions; and
one or more consecutively scheduled uplink transmissions using short transmission time intervals (sTTIs); and
selecting an ON/OFF time mask to use for transmitting the one or more uplink transmissions based on the determined allowed placement of the transient period.
2. A wireless device, comprising:
a receiver;
a transmitter; and
processing circuitry coupled to the receiver and the transmitter, the processing circuitry configured to:
receive, via the receiver, an uplink grant from a network node, the uplink grant scheduling one or more uplink transmissions by the wireless device, the one or more uplink transmissions comprising a reference symbol, wherein a position of the reference symbol in the one or more uplink transmissions is flexible, and the uplink grant includes an indication of the position of the reference symbol in the one or more uplink transmissions;
determine, based on the received uplink grant, an allowed placement of a transient period of an ON/OFF time mask and a duration of the transient period to use for the one or more uplink transmissions, wherein the processing circuitry is configured to determine the allowed placement and the duration of the transient period further based on:
the position of the reference symbol in the one or more uplink transmissions; and
one or more consecutively scheduled uplink transmissions using short transmission time intervals (sTTIs); and
select an ON/OFF time mask to use for transmitting the one or more uplink transmissions based on the determined allowed placement of the transient period.
3. The wireless device of claim 2 , wherein the processing circuitry is further configured to:
perform, via the transmitter, the scheduled one or more uplink transmissions using the selected ON/OFF time mask.
4. The wireless device of claim 2 , wherein the processing circuitry is configured to determine the allowed placement and the duration of the transient period further based on one or more of:
one or more pre-defined rules;
a modulation to be used for the one or more uplink transmissions;
a coding rate to be used for the one or more uplink transmissions;
a modulation and coding scheme to be used for the one or more uplink transmissions;
a power level of one or more sTTIs;
a power level of one or more symbols; and
whether the one or more uplink transmissions share reference symbols.
5. The wireless device of claim 2 , wherein a transient period of the selected ON/OFF time mask overlaps with one or more of:
a reference symbol of at least one of the scheduled one or more uplink transmissions; and
a data symbol of at least one of the scheduled one or more uplink transmissions.
6. The wireless device of claim 2 wherein:
the scheduled one or more uplink transmissions comprise at least one uplink transmission preceding or following a scheduled sounding reference signal (SRS) transmission; and
a transient period of the selected ON/OFF time mask does not overlap with the scheduled SRS transmission.
7. The wireless device of claim 2 , wherein:
the scheduled one or more uplink transmissions comprise at least one data uplink transmission preceding or following a scheduled control channel transmission; and
the processing circuitry is configured to determine a position of at least one of:
a reference symbol of the at least one data uplink transmission relative to the scheduled control channel transmission in time;
a data symbol of the at least one data uplink transmission relative to the scheduled control channel transmission in time;
a reference symbol of the scheduled control channel transmission; and
a data symbol of the scheduled control channel transmission.
8. The wireless device of claim 7 , wherein a transient period of the selected ON/OFF time mask overlaps with the reference symbol of the at least one data uplink transmission if the reference symbol is next to the scheduled control channel transmission in time.
9. The wireless device of claim 7 , wherein a transient period of the selected ON/OFF time mask overlaps with both the data symbol of the at least one data uplink transmission and the scheduled control channel transmission if the data symbol of the at least data uplink transmission is next to the scheduled control channel transmission in time.
10. The wireless device of claim 7 , wherein a transient period of the selected ON/OFF time mask overlaps with both the reference symbol of the at least one data uplink transmission and the reference symbol of the scheduled control channel transmission if both reference symbols are placed consecutively.
11. The wireless device of claim 7 , wherein a transient period of the selected ON/OFF time mask overlaps both the data symbol of the at least one data uplink transmission and the data symbol of the scheduled control channel transmission if both the reference symbol of the at least one data uplink transmission and the reference symbol of the scheduled control channel transmission are placed consecutively.
12. The wireless device of claim 2 , wherein:
the scheduled one or more uplink transmissions comprise two or more uplink transmissions; and
a transient period of the selected ON/OFF time mask overlaps with a reference symbol of at least one of the two or more uplink transmissions if the two or more uplink transmissions have separate reference symbol positions.
13. The wireless device of claim 2 , wherein:
the scheduled one or more uplink transmissions comprise two or more uplink transmissions; and
a transient period of the selected ON/OFF time mask overlaps with a data symbol of at least one of the two or more uplink transmissions if the two or more uplink transmissions share reference symbol positions.
14. The wireless device of claim 2 , wherein:
the scheduled one or more uplink transmissions comprise two or more uplink transmissions; and
a transient period of the selected ON/OFF time mask overlaps with a reference symbol of a first uplink transmission of the two or more uplink transmissions and a data symbol of a second uplink transmission of the two or more uplink transmissions.
15. The wireless device of claim 2 , wherein selecting the ON/OFF time mask to use for transmitting the one or more uplink transmissions comprises selecting an ON/OFF time mask in which the transient period does not overlap with any symbols of the scheduled one or more uplink transmissions.
16. The wireless device of claim 2 , wherein the one or more uplink transmissions are scheduled using short transmission time intervals.