Downlink Monitoring Using Search Space Sets
Wireless communication techniques using search space sets are described. A downlink channel may be monitored using search space sets based on one or more conditions. For example, a downlink channel may be monitored on a first search space set during a first time period (e.g., before an expiration of a timer) and/or a downlink channel may be monitored on a second search space set during a second time period (e.g., after an expiration of a timer).
1 . A method comprising:
receiving, by a wireless device while a bandwidth part (BWP) inactivity timer is running, downlink control information (DCI);
starting, based on the DCI, a second timer for monitoring a first downlink control channel on a first SS set; and
based on an expiration of the second timer:
stopping monitoring the first downlink control channel on the first SS set; and
starting monitoring a second downlink control channel different from the first downlink control channel.
2 . The method of claim 1 , further comprising:
based on the DCI:
stopping monitoring the second downlink control channel; and
starting monitoring the first downlink control channel on the first SS set.
3 . The method of claim 1 , further comprising:
receiving one or more configuration parameters associated with a power saving configuration, wherein the DCI comprises a command indicating activation of the power saving configuration.
4 . The method of claim 3 , further comprising:
monitoring, based on the one or more configuration parameters, the first downlink control channel on the first SS set.
5 . The method of claim 3 , wherein the one or more configuration parameters indicate at least one of:
a periodicity of the first downlink control channel on the first SS set;
a quantity of resource blocks in a frequency domain;
a BWP indicator indicating a bandwidth of a cell; or
a control resource set.
6 . The method of claim 1 , further comprising:
receiving, via the first downlink control channel on the first SS set, a downlink assignment; and
receiving, based on the downlink assignment, at least one transport block.
7 . The method of claim 1 , further comprising:
receiving, via the first downlink control channel on the first SS set, an uplink grant; and
transmitting, based on the uplink grant, at least one transport block.
8 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive, while a bandwidth part (BWP) inactivity timer is running, downlink control information (DCI);
start, based on the DCI, a second timer for monitoring a first downlink control channel on a first SS set; and
based on an expiration of the second timer:
stop monitoring the first downlink control channel on the first SS set; and
start monitoring a second downlink control channel different from the first downlink control channel.
9 . The wireless device of claim 8 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
based on the DCI:
stop monitoring the second downlink control channel; and
start monitoring the first downlink control channel on the first SS set.
10 . The wireless device of claim 8 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
receive one or more configuration parameters associated with a power saving configuration, wherein the DCI comprises a command indicating activation of the power saving configuration.
11 . The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
monitor, based on the one or more configuration parameters, the first downlink control channel on the first SS set.
12 . The wireless device of claim 10 , wherein the one or more configuration parameters indicate at least one of:
a periodicity of the first downlink control channel on the first SS set;
a quantity of resource blocks in a frequency domain;
a BWP indicator indicating a bandwidth of a cell; or
a control resource set.
13 . The wireless device of claim 8 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
receive, via the first downlink control channel on the first SS set, a downlink assignment; and
receive, based on the downlink assignment, at least one transport block.
14 . The wireless device of claim 8 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to:
receive, via the first downlink control channel on the first SS set, an uplink grant; and
transmit, based on the uplink grant, at least one transport block.
15 . A non-transitory computer-readable medium storing instructions that, when executed, cause:
receiving, while a bandwidth part (BWP) inactivity timer is running, downlink control information (DCI);
starting, based on the DCI, a second timer for monitoring a first downlink control channel on a first SS set; and
based on an expiration of the second timer:
stopping monitoring the first downlink control channel on the first SS set; and
starting monitoring a second downlink control channel different from the first downlink control channel.
16 . The non-transitory computer-readable medium of claim 15 , wherein the instructions, when executed, further cause:
based on the DCI:
stop monitoring the second downlink control channel; and
start monitoring the first downlink control channel on the first SS set.
17 . The non-transitory computer-readable medium of claim 15 , wherein the instructions, when executed, further cause receiving one or more configuration parameters associated with a power saving configuration, wherein the DCI comprises a command indicating activation of the power saving configuration.
18 . The non-transitory computer-readable medium of claim 17 , wherein the instructions, when executed, further cause monitoring, based on the one or more configuration parameters, the first downlink control channel on the first SS set.
19 . The non-transitory computer-readable medium of claim 17 , wherein the one or more configuration parameters indicate at least one of:
a periodicity of the first downlink control channel on the first SS set;
a quantity of resource blocks in a frequency domain;
a BWP indicator indicating a bandwidth of a cell; or
a control resource set.
20 . The non-transitory computer-readable medium of claim 15 , wherein the instructions, when executed, further cause:
receiving, via the first downlink control channel on the first SS set, a downlink assignment; and
receiving, based on the downlink assignment, at least one transport block.