Sounding reference signal in a wireless network
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.
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 comprising:
a first PUCCH group comprising a first PUCCH cell with a first PUCCH transmitted to the base station; and
a second PUCCH group comprising a second PUCCH cell with a second PUCCH transmitted to the base station; and
transmitting, in a subframe and in the 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 a PUCCH and a PUSCH in the second PUCCH group; and
wherein the plurality of cells are in a single timing advance group.
2. The method of claim 1 , wherein the wireless device is not uplink power limited.
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 on any cell of the plurality of cells grouped into the first PUCCH group in parallel with a first data packet on any cell of the plurality of cells grouped into the second PUCCH group; and
dropping a configured transmission of a second SRS on any cell the plurality of cells grouped into the first PUCCH group when a second data packet is transmitted on any other cell of the plurality of cells grouped into 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 any cell of the plurality of cells grouped into the first PUCCH group in parallel with a first PUCCH signal on the second PUCCH cell; and
dropping a configured transmission of a second SRS on any cell of the plurality of cells grouped into the first PUCCH group when a second PUCCH signal is transmitted on the first PUCCH cell 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 in the at least one message; and
triggering an SRS type 2 transmission in response to downlink control information transmitted on a downlink physical channel.
8. 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 comprising:
a first PUCCH group comprising a first PUCCH cell with a first PUCCH transmitted to the base station; and
a second PUCCH group comprising a second PUCCH cell with a second PUCCH transmitted to the base station;
transmitting, employing a sounding procedure, a first sounding reference signal (SRS) on any cell of the plurality of cells grouped into the first PUCCH group in parallel with a first data packet on any cell of the plurality of cells grouped into the second PUCCH group; and
dropping a configured transmission of a second SRS on any cell of the plurality of cells grouped into the first PUCCH group when a second data packet is transmitted on any other cell of the plurality of cells grouped into the first PUCCH group in parallel with the configured transmission of the second SRS; and
wherein the sounding procedure is independent of transmissions of a physical uplink shared channel (PUSCH) in the second PUCCH group and is dependent, at least in part, on transmissions of a PUSCH in the first PUCCH group; and
wherein the plurality of cells are in a single timing advance group.
9. The method of claim 8 , wherein:
the any cell of the plurality of cells grouped into the first PUCCH group is the first PUCCH cell; or
the any cell of the plurality of cells grouped into the second PUCCH group is the second PUCCH cell.
10. The method of claim 8 , further comprising transmitting a first PUCCH signal on the second PUCCH cell in parallel with the first SRS.
11. The method of claim 8 , wherein the wireless device is not uplink power limited.
12. The method of claim 8 , wherein the at least one message comprises SRS configuration parameters comprising:
an SRS bandwidth parameter; and
an SRS subframe configuration parameter.
13. The method of claim 8 , further comprising:
triggering an SRS type 1 transmission in response to a message in the at least one message; and
triggering an SRS type 2 transmission in response to downlink control information transmitted on a downlink physical channel.
14. 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 comprising:
a first PUCCH group comprising a first PUCCH cell with a first PUCCH transmitted to the base station; and
a second PUCCH group comprising a second PUCCH cell with a second PUCCH transmitted to the base station;
transmitting, employing a sounding procedure, a first sounding reference signal (SRS) on any cell of the plurality of cells grouped into the first PUCCH group in parallel with a first PUCCH signal on the second PUCCH cell; and
dropping a configured transmission of a second SRS on any cell of the plurality of cells grouped into the first PUCCH group when a second PUCCH signal is transmitted on the first PUCCH cell in parallel with the configured transmission of the second SRS; and
wherein the sounding procedure is independent of transmissions of a PUCCH in the second PUCCH group and is dependent, at least in part, on transmissions of a PUCCH in the first PUCCH group; and
wherein the plurality of cells are in a single timing advance group.
15. The method of claim 14 , wherein the any cell of the plurality of cells grouped into the first PUCCH group is the first PUCCH cell.
16. The method of claim 14 , further comprising transmitting a first data packet on the second PUCCH group in parallel with the first SRS.
17. The method of claim 14 , wherein:
the first PUCCH signal and the second PUCCH signal are of PUCCH format 2/2a/2b and the first SRS and the second SRS are of Type 0; or
the first PUCCH signal and the second PUCCH signal are of PUCCH format 2a/2b with hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission and the first SRS and the second SRS are of Type 1.
18. The method of claim 14 , wherein the wireless device is not uplink power limited.
19. The method of claim 14 , wherein the at least one message comprises SRS configuration parameters comprising:
an SRS bandwidth parameter; and
an SRS subframe configuration parameter.
20. The method of claim 14 , further comprising:
triggering an SRS type 1 transmission in response to a message in the at least one message; and
triggering an SRS type 2 transmission in response to downlink control information transmitted on a downlink physical channel.