Downlink and Uplink Channel Transmission and Monitoring in a Wireless Network
A wireless device receives one or more radio resource control (RRC) messages comprising cell indexes of secondary cells of a cell group. The wireless device does not monitor, on a secondary cell of the secondary cells, a physical downlink control channel (PDCCH) during a time duration based on the time duration corresponding to an uplink transmission on a lead secondary cell with a lowest cell index among the secondary cells of the cell group, where the lead secondary cell is an activated secondary cell.
1 . A method comprising:
receiving, by a wireless device, one or more radio resource control (RRC) messages comprising cell indexes of secondary cells of a cell group; and
not monitoring, on a secondary cell of the secondary cells, a physical downlink control channel (PDCCH) during a time duration based on the time duration corresponding to an uplink transmission on a lead secondary cell with a lowest cell index among the secondary cells of the cell group, wherein the lead secondary cell is an activated secondary cell.
2 . The method of claim 1 , further comprising:
transmitting, via the lead secondary cell, the uplink transmission during the time duration; and
not receiving, on the secondary cell, the PDCCH during the time duration.
3 . The method of claim 2 , further comprising not transmitting uplink signals during a second time duration for another secondary cell of the secondary cells based on the second time duration corresponding to a downlink transmission on the lead secondary cell.
4 . The method of claim 3 , further comprising receiving, via the lead secondary cell of the secondary cells, the downlink transmission during the second time duration.
5 . The method of claim 4 , wherein the secondary cells of the cell group are in the same frequency band.
6 . The method of claim 5 , wherein:
the secondary cells in the cell group are in a first frequency band; and
a second plurality of cells in a second group are in a second frequency band.
7 . The method of claim 6 , further comprising transmitting a UE capability message comprising one or more parameters indicating a UE capability associated with simultaneous reception and transmission via cells.
8 . The method of claim 7 , wherein when the wireless device is not capable of receiving downlink signals in the cell group at a time duration, the wireless device:
does not decode downlink signals of one or more cells of the cell group during the time duration;
does not blind decode the downlink cell or does not search for downlink signals;
does not expect to receive downlink signals comprising at least one of synchronization signals, demodulation reference signal (DRS), physical downlink control channel (PDCCH), or physical downlink shared channel (PDSCH); or
does not decode received signals.
9 . The method of claim 8 , further comprising obtaining, by the wireless device and via control signaling, uplink-downlink configuration of the secondary cells, wherein:
the uplink-downlink configuration in a secondary cell controls in which time intervals uplink or downlink transmissions take place;
the secondary cells are aggregated; and
the wireless device is not capable of simultaneous reception and transmission in the aggregated secondary cells.
10 . The method of claim 9 , wherein the one or more RRC messages configures the cell group based on simultaneous reception and transmission capability in aggregated cells within the cell group.
11 . The method of claim 10 , wherein:
the one or more RRC messages comprises configuration parameters of the secondary cells;
the cell group is identified by a group index; and
the one or more RRC messages associate the secondary cells with the cell group using the cell group index.
12 . The method of claim 1 , further comprising obtaining, by the wireless device and via control signaling, uplink-downlink configuration of the secondary cells, wherein the uplink-downlink configuration in a secondary cell controls in which time intervals uplink or downlink transmissions take place.
13 . The method of claim 12 , further comprising:
transmitting, via the lead secondary cell, the uplink transmission during the time duration; and
not receiving, on the secondary cell, the PDCCH during the time duration.
14 . The method of claim 13 , further comprising not transmitting uplink signals during a second time duration for another secondary cell of the secondary cells based on the second time duration corresponding to a downlink transmission on the lead secondary cell.
15 . The method of claim 14 , further comprising receiving, via the lead secondary cell of the secondary cells, the downlink transmission during the second time duration.
16 . 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 one or more radio resource control (RRC) messages comprising cell indexes of secondary cells of a cell group; and
not monitor on a secondary cell of the secondary cells, a physical downlink control channel (PDCCH) during a time duration based on the time duration corresponding to an uplink transmission on a lead secondary cell with a lowest cell index among the secondary cells of the cell group, wherein the lead secondary cell is an activated secondary cell.
17 . The wireless device of claim 16 , wherein the instructions further cause the wireless device to:
transmit, via the lead secondary cell, the uplink transmission during the time duration; and
not receive, on the secondary cell, the PDCCH during the time duration.
18 . The wireless device of claim 17 , wherein the instructions further cause the wireless device to not transmit uplink signals during a second time duration for another secondary cell of the secondary cells based on the second time duration corresponding to a downlink transmission on the lead secondary cell.
19 . The wireless device of claim 18 , wherein the instructions further cause the wireless device to receive, via the lead secondary cell of the secondary cells, the downlink transmission during the second time duration.
20 . The wireless device of claim 19 , wherein the secondary cells of the cell group are in the same frequency band.
21 . The wireless device of claim 19 , wherein:
the secondary cells in the cell group are in a first frequency band; and
a second plurality of cells in a second group are in a second frequency band.
22 . The wireless device of claim 21 , wherein the instructions further cause the wireless device to transmit a UE capability message comprising one or more parameters indicating a UE capability associated with simultaneous reception and transmission via cells.
23 . The wireless device of claim 22 , wherein when the wireless device is not capable of receiving downlink signals in the cell group at a time duration, the wireless device:
does not decode downlink signals of one or more cells of the cell group during the time duration;
does not blind decode the downlink cell or does not search for downlink signals;
does not expect to receive downlink signals comprising at least one of synchronization signals, demodulation reference signal (DRS), physical downlink control channel (PDCCH), or physical downlink shared channel (PDSCH); or
does not decode received signals.
24 . The wireless device of claim 23 , wherein the instructions further cause the wireless device to obtain, via control signaling, uplink-downlink configuration of the secondary cells, wherein:
the uplink-downlink configuration in a secondary cell controls in which time intervals uplink or downlink transmissions take place;
the secondary cells are aggregated; and
the wireless device is not capable of simultaneous reception and transmission in the aggregated secondary cells.
25 . The wireless device of claim 16 , wherein the one or more RRC messages configures the cell group based on simultaneous reception and transmission capability in aggregated cells within the cell group.
26 . The wireless device of claim 16 , wherein:
the one or more RRC messages comprises configuration parameters of the secondary cells;
the cell group is identified by a group index; and
the one or more RRC messages associate the secondary cells with the cell group using the cell group index.
27 . The wireless device of claim 16 , wherein the instructions further cause the wireless device to obtain, via control signaling, uplink-downlink configuration of the secondary cells, wherein the uplink-downlink configuration in a secondary cell controls in which time intervals uplink or downlink transmissions take place.
28 . The wireless device of claim 27 , wherein the instructions further cause the wireless device to:
transmit, via the lead secondary cell, the uplink transmission during the time duration; and
not receive, on the secondary cell, the PDCCH during the time duration.
29 . The wireless device of claim 28 , wherein the instructions further cause the wireless device to not transmit uplink signals during a second time duration for another secondary cell of the secondary cells based on the second time duration corresponding to a downlink transmission on the lead secondary cell.
30 . The wireless device of claim 29 , wherein the instructions further cause the wireless device to receive, via the lead secondary cell of the secondary cells, the downlink transmission during the second time duration.