Switching a configuration of a search space set used for control channel monitoring
According to certain embodiments, a method performed by a wireless device comprises monitoring a first search space set for a control channel candidate, receiving an indication to switch the search space set from a network node, and switching the search space set based on receiving the indication to switch the search space set. Switching the search space set comprises stopping the monitoring of the first search space set and starting monitoring a second search space set for the control channel candidate.
1. A method performed by a wireless device, the method comprising:
monitoring a first search space set for a control channel candidate;
receiving, from a network node, an indication to switch the search space set;
switching the search space set based on receiving the indication to switch the search space set, wherein switching the search space set comprises stopping the monitoring of the first search space set and starting monitoring a second search space set for the control channel candidate;
receiving search space set group information from the network node, the search space set group information indicating a plurality of search space sets and, for each search space set, a group identifier associated with the search space set; and
determining the first search space set and the second search space set based on the search space set group information, wherein the first search space set comprises each search space set for which the associated group identifier has a first value and the second search space set comprises each search space set for which the associated group identifier has a second value.
2. The method of claim 1 , wherein the indication to switch the search space set is received in a field in a group common downlink control information (DCI) format.
3. The method of claim 1 , further comprising:
switching the search space set after a pre-determined period, wherein switching the search space set comprises stopping the monitoring of the second search space set and starting monitoring the first search space set.
4. The method of claim 1 , further comprising:
starting a timer based on starting the monitoring of the second search space set; and
switching the search space set based on an expiry of the timer, wherein switching the search space set comprises stopping monitoring the second search space set and starting monitoring the first search space set.
5. The method of claim 4 , further comprising:
receiving a value for the timer from the network node.
6. The method of claim 5 , wherein the value for the timer is received by a radio resource control configuration message from the network node.
7. The method of claim 1 , wherein the indication to switch the search space set is received in a group identifier field of a group common downlink control information (DCI) format, the group identifier field indicating either the first value or the second value for the group identifier.
8. The method of claim 1 , wherein the monitoring of the first search space set is started based on receiving the search space set group information from the network node.
9. The method of claim 1 , wherein the search space set group information is received by a radio resource control configuration message from the network node.
10. A wireless device comprising:
memory operable to store instructions; and
processing circuitry operable to execute the instructions to cause the wireless device to:
monitor a first search space set for a control channel candidate;
receive, from a network node, an indication to switch the search space set;
switch the search space set based on receiving the indication to switch the search space set, wherein to switch the search space set, the processing circuitry is operable to stop the monitoring of the first search space set and start monitoring a second search space set for the control channel candidate;
receive search space set group information from the network node, the search space set group information indicating a plurality of search space sets and, for each search space set, a group identifier associated with the search space set; and
determine the first search space set and the second search space set based on the search space set group information, wherein the first search space set comprises each search space set for which the associated group identifier has a first value and the second search space set comprises each search space set for which the associated group identifier has a second value.
11. The wireless device of claim 10 , wherein the indication to switch the search space set is received in a field in a group common downlink control information (DCI) format.
12. The wireless device of claim 10 , the processing circuitry further operable to:
switch the search space set after a pre-determined period, wherein to switch the search space set, the processing circuitry is operable to stop the monitoring of the second search space set and start monitoring the first search space set.
13. The wireless device of claim 10 , wherein the processing circuitry is further operable to:
start a timer based on starting the monitoring of the second search space set; and
switch the search space set based on an expiry of the timer, wherein to switch the search space set, the processing circuitry is operable to stop monitoring the second search space set and start monitoring the first search space set.
14. The wireless device of claim 13 , the processing circuitry further operable to:
receive a value for the timer from the network node.
15. The wireless device of claim 14 , wherein the value for the timer is received by a radio resource control configuration message from the network node.
16. The wireless device of claim 10 , wherein the indication to switch the search space set is received in a group identifier field of a group common downlink control information (DCI) format, the group identifier field indicating either the first value or the second value for the group identifier.
17. The wireless device of claim 10 , wherein the processing circuitry is operable to start the monitoring of the first search space set based on receiving the search space set group information from the network node.
18. The wireless device of claim 10 , wherein the search space set group information is received by a radio resource control configuration message from the network node.
19. A method performed by a network node, the method comprising:
sending, to a wireless device, an indication to switch a search space set that the wireless device monitors for a control channel candidate, wherein switching the search space set comprises stopping the monitoring of a first search space set and starting monitoring a second search space set for the control channel candidate; and
sending search space set group information to the wireless device, the search space set group information indicating a plurality of search space sets and, for each search space set, a group identifier associated with the search space set, wherein the first search space set comprises each search space set for which the associated group identifier has a first value and the second search space set comprises each search space set for which the associated group identifier has a second value.
20. The method of claim 19 , wherein the indication to switch the search space set is sent in a field in a group common downlink control information (DCI) format.
21. The method of claim 19 , further comprising:
sending the wireless device a value for a timer that the wireless device uses to determine when to stop monitoring the second search space set and start monitoring the first search space set, wherein the value for the timer is sent to the wireless device via a radio resource control configuration message.
22. The method of claim 19 , wherein the indication to switch the search space set is sent in a group identifier field of a group common downlink control information (DCI) format, the group identifier field indicating either the first value or the second value for the group identifier.
23. The method of claim 19 , wherein the search space set group information is sent to the wireless device via a radio resource control configuration message.
24. A network node comprising:
memory operable to store instructions; and
processing circuitry operable to execute the instructions to cause the network node to:
send, to a wireless device, an indication to switch a search space set that the wireless device monitors for a control channel candidate, wherein switching the search space set comprises stopping the monitoring of a first search space set and starting monitoring a second search space set for the control channel candidate; and
send search space set group information to the wireless device, the search space set group information indicating a plurality of search space sets and, for each search space set, a group identifier associated with the search space set, wherein the first search space set comprises each search space set for which the associated group identifier has a first value and the second search space set comprises each search space set for which the associated group identifier has a second value.
25. The network node of claim 24 , wherein the indication to switch the search space set is sent in a group identifier field of a group common downlink control information (DCI) format, the group identifier field indicating either the first value or the second value for the group identifier.
26. The network node of claim 24 , wherein the search space set group information is sent to the wireless device via a radio resource control configuration message.