Configuration aspects of a tracking reference signal in new radio
Methods, systems, and devices for wireless communications are described for configuration aspects of a tracking reference signal in New Radio. A base station may select a first burst duration and a second burst duration for a tracking reference signal (TRS) burst, the first burst duration being different from the second burst duration, and may transmit configuration information indicating the first burst duration and the second burst duration to a user equipment (UE). The base station may transmit a first TRS burst having the first burst duration and a second TRS burst having the second burst duration. The UE may detect the first TRS burst having the first burst duration and the second TRS burst having the second burst duration based at least in part on the configuration information, and perform resource tracking based at least in part on the detected first TRS burst and the second TRS burst.
1. A method for wireless communication by a user equipment (UE), comprising:
receiving configuration information indicating a frequency offset parameter;
detecting a tracking reference signal (TRS) transmission within a frequency band based at least in part on the frequency offset parameter; and
performing resource tracking based at least in part on the detected TRS transmission.
2. The method of claim 1 , further comprising:
determining, from the configuration information, tone spacing; and
processing the frequency offset parameter and the tone spacing to determine a location of at least one TRS tone of the TRS transmission within the frequency band relative to a reference frequency.
3. The method of claim 1 , further comprising:
processing the frequency offset parameter to determine a first offset value corresponding to a first transmission time interval (TTI) and a second offset value corresponding to a second TTI; and
monitoring for a TRS tone of the TRS transmission within the first TTI corresponding to the first offset value and for a TRS tone of the TRS transmission within the second TTI corresponding to the second offset value.
4. The method of claim 1 , wherein the frequency offset parameter indicates an offset in a number of resource elements.
5. The method of claim 1 , wherein the frequency offset parameter indicates a bandwidth part of a plurality of different bandwidth parts within a system bandwidth.
6. The method of claim 1 , further comprising:
determining, from the configuration information, a first burst duration and a second burst duration for the TRS transmission; and
monitoring for the TRS transmission having the first burst duration and a second TRS transmission having the second burst duration based at least in part on the configuration information.
7. The method of claim 1 , further comprising:
determining, from the frequency offset parameter, an offset value for a plurality of symbol indexes; and
monitoring, at a plurality of respective symbol periods corresponding to the plurality of symbol indexes, for a TRS tone of the TRS transmission.
8. A method for wireless communication by a base station, comprising:
selecting a frequency offset parameter;
transmitting configuration information indicating the frequency offset parameter; and
transmitting a tracking reference signal (TRS) transmission having a frequency offset corresponding to the frequency offset parameter.
9. The method of claim 8 , further comprising:
determining tone spacing for the TRS transmission, wherein the configuration information indicates the tone spacing.
10. The method of claim 8 , wherein determining a first offset value corresponding to a first transmission time interval (TTI) and a second offset value corresponding to a second TTI, wherein the frequency offset parameter indicates the first offset value and the second offset value, wherein transmitting the TRS transmission comprises:
transmitting a TRS tone of the TRS transmission within the first TTI corresponding to the first offset value and a TRS tone of the TRS transmission within the second TTI corresponding to the second offset value.
11. The method of claim 10 , wherein the frequency offset parameter indicates an offset in a number of resource elements.
12. The method of claim 10 , wherein the frequency offset parameter indicates a bandwidth part of a plurality of different bandwidth parts within a system bandwidth.
13. The method of claim 10 , further comprising:
determining an offset value for a plurality of symbol indexes, wherein the configuration information indicates the plurality of symbol indexes.
14. 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 configuration information indicating a frequency offset parameter;
detect a tracking reference signal (TRS) transmission within a frequency band based at least in part on the frequency offset parameter; and
perform resource tracking based at least in part on the detected TRS transmission.
15. The apparatus of claim 14 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine, from the configuration information, tone spacing; and
process the frequency offset parameter and the tone spacing to determine a location of at least one TRS tone of the TRS transmission within the frequency band relative to a reference frequency.
16. The apparatus of claim 14 , wherein the instructions are further executable by the processor to cause the apparatus to:
process the frequency offset parameter to determine a first offset value corresponding to a first transmission time interval (TTI) and a second offset value corresponding to a second TTI; and
monitor for a TRS tone of the TRS transmission within the first TTI corresponding to the first offset value and for a TRS tone of the TRS transmission within the second TTI corresponding to the second offset value.
17. 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:
select a frequency offset parameter;
transmit configuration information indicating the frequency offset parameter; and
transmit a tracking reference signal (TRS) transmission having a frequency offset corresponding to the frequency offset parameter.
18. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine tone spacing for the TRS transmission, wherein the configuration information indicates the tone spacing.
19. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine a first offset value corresponding to a first transmission time interval (TTI) and a second offset value corresponding to a second TTI, wherein the frequency offset parameter indicates the first offset value and the second offset value, wherein the instruction for transmitting the TRS transmission are executable by the processor to cause the apparatus to:
transmit a TRS tone of the TRS transmission within the first TTI corresponding to the first offset value and a TRS tone of the TRS transmission within the second TTI corresponding to the second offset value.