Wireless device sounding procedure
View Patent ↗A wireless device receives at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups. The wireless device transmits, in a subframe and in a first PUCCH group, at least one SRS employing a sounding procedure for the first PUCCH group. The sounding procedure may depend, at least in part, on transmissions of a physical uplink shared channel (PUSCH) or a PUCCH in the first PUCCH group and may be independent of transmissions of PUCCH and PUSCH in a second PUCCH group. The plurality of cells may be in the same timing advance group.
1. A method comprising:
receiving, by a wireless device from a base station, at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups;
transmitting, in a subframe and in a first PUCCH group, at least one sounding reference signal (SRS) employing a sounding procedure for the first PUCCH group, wherein the sounding procedure:
depends, at least in part, on transmissions of a physical uplink shared channel (PUSCH) or a PUCCH in the first PUCCH group; and
is independent of transmissions of PUCCH and PUSCH in a second PUCCH group; and
wherein the plurality of cells are in the same timing advance group.
2. The method of claim 1 , wherein the wireless device is not uplink power limited in the subframe.
3. The method of claim 1 , wherein the sounding procedure comprises a first procedure for transmitting one or more SRSs and a second procedure for dropping transmission of one or more SRSs.
4. The method of claim 1 , further comprising:
transmitting a first SRS via a first cell of the first PUCCH group in parallel with a first data packet via a second cell of the second PUCCH group; and
dropping a configured transmission of a second SRS on the first cell when a second data packet is transmitted via a third cell of the first PUCCH group in parallel with the configured transmission of the second SRS.
5. The method of claim 1 , further comprising:
transmitting a first SRS on a first cell of the first PUCCH group in parallel with a first PUCCH signal via a second cell of the second PUCCH group; and
dropping a configured transmission of a second SRS on the first cell when a second PUCCH signal is transmitted via a third cell of the first PUCCH group in parallel with the configured transmission of the second SRS.
6. The method of claim 1 , wherein the at least one message comprise SRS configuration parameters comprising an SRS bandwidth parameter and an SRS subframe configuration parameter.
7. The method of claim 1 , further comprising:
triggering an SRS type 1 transmission in response to a message of the at least one message; or
triggering an SRS type 2 transmission in response to downlink control information transmitted via a downlink physical channel.
8. The method of claim 1 , wherein the plurality of cells comprises a primary cell and one or more secondary cells.
9. 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 at least one message comprising configuration parameters of a plurality of cells grouped into a plurality of physical uplink control channel (PUCCH) groups;
transmit, in a subframe and in a first PUCCH group, at least one sounding reference signal (SRS) employing a sounding procedure for the first PUCCH group, wherein the sounding procedure depends:
at least in part, on transmissions of a physical uplink shared channel (PUSCH) or a PUCCH in the first PUCCH group; and
is independent of transmissions of PUCCH and PUSCH in a second PUCCH group; and
wherein the plurality of cells are in the same timing advance group.
10. The wireless device of claim 9 , wherein the wireless device is not uplink power limited in the subframe.
11. The wireless device of claim 9 , wherein the sounding procedure comprises a first procedure for transmitting one or more SRSs and a second procedure for dropping transmission of one or more SRSs.
12. The wireless device of claim 9 , wherein the instructions, when executed, further cause the wireless device to:
transmit a first SRS via a first cell of the first PUCCH group in parallel with a first data packet via a second cell of the second PUCCH group; and
drop a configured transmission of a second SRS on the first cell when a second data packet is transmitted via a third cell of the first PUCCH group in parallel with the configured transmission of the second SRS.
13. The wireless device of claim 9 , wherein the instructions, when executed, further cause the wireless device to:
transmit a first SRS on a first cell of the first PUCCH group in parallel with a first PUCCH signal via a second cell of the second PUCCH group; and
drop a configured transmission of a second SRS on the first cell when a second PUCCH signal is transmitted via a third cell of the first PUCCH group in parallel with the configured transmission of the second SRS.
14. The wireless device of claim 9 , wherein the at least one message comprises SRS configuration parameters comprising an SRS bandwidth parameter and an SRS subframe configuration parameter.
15. The wireless device of claim 9 , wherein the instructions, when executed, further cause the wireless device to:
trigger an SRS type 1 transmission in response to a message of the at least one message; or
trigger an SRS type 2 transmission in response to downlink control information transmitted via a downlink physical channel.
16. The wireless device of claim 9 , wherein the plurality of cells comprises a primary cell and one or more secondary cells.