Multi-subframe uplink grant in a wireless device
A base station sends, to a wireless device, one or more RRC messages comprising configuration parameters for a LAA cell, the configuration parameters comprising one or more CSI parameters. The base station sends, to the wireless device, a DCI indicating uplink resources in a number of one or more consecutive uplink subframes of the LAA cell, the DCI comprising a first field, a second field, and one or more third fields. The base station determines a position of a first subframe in the one or more consecutive uplink subframes employing the first field, and receives, in the first subframe, one or more CSI fields of the LAA cell, when the second field is set to trigger a CSI report, and the wireless device is allowed to transmit in the first subframe according to a LBT procedure based, at least, on the one or more third fields.
1. A method comprising:
transmitting, by a base station to a wireless device, a downlink control information (DCI), for an uplink multi-subframe grant (MSFG), scheduling physical uplink shared channel (PUSCH) resources in a plurality of consecutive PUSCH subframes, the DCI comprising a first field and a second field;
determining a position, indicated by the first field, of a first PUSCH subframe in which to receive one or more channel state information (CSI) fields, wherein the first PUSCH subframe is among the plurality of consecutive PUSCH subframes; and
receiving, from the wireless device in the first PUSCH subframe, the one or more CSI fields in response to the second field triggering a CSI report.
2. The method of claim 1 , wherein the DCI indicates a number of the plurality of consecutive PUSCH subframes.
3. The method of claim 1 , wherein the one or more CSI fields are associated with one or more CSI processes identified based, at least in part, on the second field.
4. The method of claim 1 , wherein the one or more CSI fields comprise a channel quality index, a precoding matrix indicator, and a rank indicator.
5. The method of claim 1 , wherein:
the DCI further comprises a third field; and
the wireless device performs a listen-before-talk (LBT) procedure based, at least, on the third field, the LBT procedure indicating a channel is available for transmission in the first PUSCH subframe.
6. The method of claim 5 , wherein the third field indicates one or more parameters for the LBT procedure, which are used in the LBT procedure to determine a duration of time that a channel is sensed to be idle before transmitting.
7. The method of claim 1 , further comprising sending, by the base station, one or more radio resource control (RRC) messages comprising configuration parameters for a licensed assisted access (LAA) cell comprising the PUSCH resources, the configuration parameters comprising one or more CSI parameters.
8. The method of claim 7 , wherein the configuration parameters indicate a subframe pattern configuration for performing measurements in one or more second subframes.
9. The method of claim 1 , wherein the DCI further comprises a fourth field indicating a resource block assignment for transmitting the one or more CSI fields.
10. The method of claim 1 , wherein the DCI further comprises a transmit power control (TPC) employed for calculating a transmit power for transmission of the one or more CSI fields.
11. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to perform operations comprising:
sending, by a base station to a wireless device, a downlink control information (DCI), for an uplink multi-subframe grant (MSFG), scheduling physical uplink shared channel (PUSCH) resources in a plurality of consecutive PUSCH subframes, the DCI comprising a first field and a second field;
determining, by the base station and based on the first field, a position of a first PUSCH subframe in which to receive one or more channel state information (CSI) fields, wherein the first PUSCH subframe is among the plurality of consecutive PUSCH subframes; and
receiving, from the wireless device in the first PUSCH subframe, the one or more CSI fields in response to the second field triggering a CSI report.
12. The base station of claim 11 , wherein the DCI indicates a number of the plurality of consecutive PUSCH subframes.
13. The base station of claim 11 , wherein the one or more CSI fields are associated with one or more CSI processes identified based, at least in part, on the second field.
14. The base station of claim 11 , wherein the one or more CSI fields comprise a channel quality index, a precoding matrix indicator, and a rank indicator.
15. The base station of claim 11 , wherein:
the DCI further comprises a third field; and
the wireless device performs a listen-before-talk (LBT) procedure based, at least, on the third field, the LBT procedure indicating a channel is available for transmission in the first PUSCH subframe.
16. The base station of claim 15 , wherein the third field indicates one or more parameters for the LBT procedure, which are used in the LBT procedure to determine a duration of time that a channel is sensed to be idle before transmitting.
17. The base station of claim 11 , further comprising sending, by the base station, one or more radio resource control (RRC) messages comprising configuration parameters for a licensed assisted access (LAA) cell comprising the PUSCH resources, the configuration parameters comprising one or more CSI parameters.
18. The base station of claim 17 , wherein the configuration parameters indicate a subframe pattern configuration for performing measurements in one or more second subframes.
19. The base station of claim 11 , wherein the DCI further comprises a fourth field indicating a resource block assignment for transmitting the one or more CSI fields.
20. The base station of claim 11 , wherein the DCI further comprises a transmit power control (TPC) employed for calculating a transmit power for transmission of the one or more CSI fields.