Frequency hopping operation for new radio
A wireless device may receive configuration parameters indicating a hopping pattern of bandwidth parts (BWPs) of a cell. The wireless device may start a BWP inactivity timer in response to activating a first BWP of the cell. In response to activating the hopping pattern, the wireless device may stop the BWP inactivity timer or it may deactivate the first BWP.
1 . A wireless device comprising:
one or more processors; and
a memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive, from a base station, configuration parameters indicating a hopping pattern of bandwidth parts (BWPs) of a cell;
start a BWP inactivity timer in response to activating a first BWP of the cell;
restart the BWP inactivity timer in response to receiving a downlink control information (DCI) scheduling a downlink assignment or uplink grant for the first BWP;
in response to activating the hopping pattern, stopping the BWP inactivity timer; and
in response to deactivating the hopping pattern, restarting the BWP inactivity timer.
2 . The wireless device of claim 1 , wherein the configuration parameters indicate the hopping pattern, of the BWPs, across time slots.
3 . The wireless device of claim 1 , wherein the configuration parameters further indicate a plurality of BWPs of the cell comprising a BWP set, wherein the hopping pattern is on the BWP set.
4 . The wireless device of claim 3 , wherein the instructions further cause the wireless device to determine to activate the hopping pattern for the BWP set.
5 . The wireless device of claim 1 , wherein the instructions further cause the wireless device to, after deactivating the hopping pattern, switch from the first BWP to a default BWP in response to the BWP inactivity timer expiring.
6 . The wireless device of claim 1 , wherein the instructions further cause the wireless device to:
receive an indication to activate the hopping pattern, wherein the indication is received via one of:
the downlink control information;
a medium access control-control element (MAC-CE); or
a radio resource control (RRC) message; and
activate the hopping pattern in response to receiving the indication.
7 . The wireless device of claim 1 , wherein the instructions further cause the wireless device to determine to activate the hopping pattern based on a periodicity of the hopping pattern.
8 . The wireless device of claim 7 , wherein the configuration parameters further indicate:
the periodicity of the hopping pattern; and
a hopping timer.
9 . The wireless device of claim 7 , wherein the instructions further cause the wireless device to determine to activate the hopping pattern based on measuring a value of a channel parameter to be at least one of:
below a first threshold; or
above a second threshold.
10 . A base station comprising:
one or more processors; and
a memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, to a wireless device, configuration parameters indicating a hopping pattern of bandwidth parts (BWPs) of a cell;
start a BWP inactivity timer, for the wireless device, in response to activating a first BWP of the cell for the wireless device;
restart the BWP inactivity timer in response to transmitting a downlink control information (DCI) scheduling a downlink assignment or uplink grant for the first BWP;
in response to activating the hopping pattern, stopping the BWP inactivity timer; and
in response to deactivating the hopping pattern, restarting the BWP inactivity timer.
11 . The base station of claim 10 , wherein the configuration parameters indicate the hopping pattern, of the BWPs, across time slots.
12 . The base station of claim 10 , wherein the configuration parameters further indicate a plurality of BWPs of the cell comprising a BWP set, wherein the hopping pattern is on the BWP set.
13 . The base station of claim 12 , wherein the instructions further cause the base station to determine to activate the hopping pattern for the BWP set.
14 . The base station of claim 10 , wherein the instructions further cause the base station to, after deactivating the hopping pattern, switch from the first BWP to a default BWP in response to the BWP inactivity timer expiring.
15 . The base station of claim 10 , wherein the instructions further cause the base station to:
transmit an indication to activate the hopping pattern, wherein the indication is transmitted via one of:
the downlink control information;
a medium access control-control element (MAC-CE); or
a radio resource control (RRC) message; and
activate the hopping pattern in response to transmitting the indication.
16 . The base station of claim 10 , wherein the instructions further cause the base station to determine to activate the hopping pattern based on a periodicity of the hopping pattern.
17 . The base station of claim 16 , wherein the configuration parameters further indicate:
the periodicity of the hopping pattern; and
a hopping timer.
18 . The base station of claim 16 , wherein the instructions further cause the base station to determine to activate the hopping pattern based on measuring a value of a channel parameter to be at least one of:
below a first threshold; or
above a second threshold.
19 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
receive, from a base station, configuration parameters indicating a hopping pattern of bandwidth parts (BWPs) of a cell;
start a BWP inactivity timer in response to activating a first BWP of the cell;
restart the BWP inactivity timer in response to receiving a downlink control information (DCI) scheduling a downlink assignment or uplink grant for the first BWP;
in response to activating the hopping pattern, stopping the BWP inactivity timer; and
in response to deactivating the hopping pattern, restarting the BWP inactivity timer.
20 . The non-transitory computer-readable medium of claim 19 , wherein the configuration parameters indicate the hopping pattern, of the BWPs, across time slots.