Access power management with multiple transmission reception points
A wireless device receives configuration parameters, of a cell. The parameters indicates a first reference signal (RS) of a first transmission reception point (TRP) of the cell, a second RS of a second TRP of the cell, random access channel (RACH) resources of a RACH of the cell, and a power offset value for the first TRP. The wireless device adjusts a first received power value of the first RS by the power offset value. The wireless device transmits a preamble, via the RACH resources, to the first TRP in response to selecting the first RS for an RS. The wireless device transmits a preamble, via the RACH resources, to the second TRP in response to selecting the second RS for the RS.
1. A method comprising:
receiving, by a wireless device, configuration parameters, of a cell, indicating:
a first reference signal (RS) of a first transmission reception point (TRP) of the cell;
a second RS of a second TRP of the cell;
random access channel (RACH) resources of a RACH of the cell; and
a power offset value for the first TRP; and
after adjusting a first received power value of the first RS by the power offset value, transmitting a preamble, via the RACH resources, to:
the first TRP in response to selecting the first RS for an RS; and
the second TRP in response to selecting the second RS for the RS.
2. The method of claim 1 , wherein the second RS is selected for the RS based on a second received power value of the second RS.
3. The method of claim 2 , wherein the selection for the RS comprises selecting:
the first RS in response to the adjusted first received power value being higher than the second received power value; and
the second RS in response to the adjusted first received power value being lower than the second receiver power value.
4. The method of claim 2 , wherein the first received power value comprises a first RS received power (RSRP) value and the second received power value comprises a second RSRP value.
5. The method of claim 1 , wherein the configuration parameters further indicate:
a first RS group associated with the first TRP and comprising the first RS;
a second RS group associated with the second TRP and comprising the second RS; and
an association between the preamble and the RS.
6. The method of claim 5 , wherein:
the adjusting is for RSs in the first RS group;
the selecting the first RS for the RS is from the RSs in the first RS group; and
the selecting the second RS for the RS is from the RSs in the second RS group.
7. The method of claim 1 , wherein the preamble is transmitted with a transmission power based on the RS.
8. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive configuration parameters, of a cell, indicating:
a first reference signal (RS) of a first transmission reception point (TRP) of the cell;
a second RS of a second TRP of the cell;
random access channel (RACH) resources of a RACH of the cell; and
a power offset value for the first TRP; and
after adjusting a first received power value of the first RS by the power offset value, transmit a preamble, via the RACH resources, to:
the first TRP in response to selecting the first RS for an RS; and
the second TRP in response to selecting the second RS for the RS.
9. The wireless device of claim 8 , wherein the second RS is selected for the RS based on a second received power value of the second RS.
10. The wireless device of claim 9 , wherein the selection for the RS comprises selecting:
the first RS in response to the adjusted first received power value being higher than the second received power value; and
the second RS in response to the adjusted first received power value being lower than the second receiver power value.
11. The wireless device of claim 9 , wherein the first received power value comprises a first RS received power (RSRP) value and the second received power value comprises a second RSRP value.
12. The wireless device of claim 8 , wherein the configuration parameters further indicate:
a first RS group associated with the first TRP and comprising the first RS;
a second RS group associated with the second TRP and comprising the second RS; and
an association between the preamble and the RS.
13. The wireless device of claim 12 , wherein:
the adjusting is for RSs in the first RS group;
the selecting the first RS for the RS is from the RSs in the first RS group; and
the selecting the second RS for the RS is from the RSs in the second RS group.
14. The wireless device of claim 8 , wherein the preamble is transmitted with a transmission power based on the RS.
15. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
receive configuration parameters, of a cell, indicating:
a first reference signal (RS) of a first transmission reception point (TRP) of the cell;
a second RS of a second TRP of the cell;
random access channel (RACH) resources of a RACH of the cell; and
a power offset value for the first TRP; and
after adjusting a first received power value of the first RS by the power offset value, transmit a preamble, via the RACH resources, to:
the first TRP in response to selecting the first RS for an RS; and
the second TRP in response to selecting the second RS for the RS.
16. The non-transitory computer-readable medium of claim 15 , wherein the second RS is selected for the RS based on a second received power value of the second RS.
17. The non-transitory computer-readable medium of claim 16 , wherein the selection for the RS comprises selecting:
the first RS in response to the adjusted first received power value being higher than the second received power value; and
the second RS in response to the adjusted first received power value being lower than the second receiver power value.
18. The non-transitory computer-readable medium of claim 16 , wherein the first received power value comprises a first RS received power (RSRP) value and the second received power value comprises a second RSRP value.
19. The non-transitory computer-readable medium of claim 15 , wherein the configuration parameters further indicate:
a first RS group associated with the first TRP and comprising the first RS;
a second RS group associated with the second TRP and comprising the second RS; and
an association between the preamble and the RS.
20. The non-transitory computer-readable medium of claim 15 , wherein the preamble is transmitted with a transmission power based on the RS.