Subframe configuration in a wireless device and wireless network
View Patent ↗A base station transmits at least one message comprising one or more first parameters identifying one or more subframes as a listen-before-talk (LBT) subframe. The base station performs an LBT procedure in a subframe in the one or more subframe. A burst is transmitted when the LBT procedure indicates a clear channel. The burst is configurable to start in the subframe if the subframe is identified as an LBT subframe.
1. A method comprising:
receiving, by a first base station from a second base station, a first message comprising one or more first parameters identifying a first plurality of subframes as a listen-before-talk (LBT) subframe of the second base station;
selecting a second plurality of subframes as an LBT subframe by the first base station based on the one or more first parameters;
transmitting, by the first base station to the second base station, a second message comprising one or more second parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe of the first base station;
transmitting, by the first base station to one or more wireless devices, at least one radio resource control (RRC) message comprising one or more third parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe;
performing, by the first base station, an LBT procedure in a subframe in the second plurality of subframes; and
transmitting, by the first base station, a burst when the LBT procedure indicates a clear channel; and
wherein the burst is configurable to start in the subframe if the subframe is identified as an LBT subframe.
2. The method of claim 1 , wherein the one or more first parameters comprise a bitmap.
3. The method of claim 1 , wherein the second plurality of subframes are associated with a licensed assisted access (LAA) cell.
4. The method of claim 1 , wherein the one or more first parameters indicate a periodic pattern for the second plurality of subframes.
5. The method of claim 1 , wherein the at least one RRC message comprises a second parameter indicating a maximum duration for the burst.
6. The method of claim 1 , wherein the at least one RRC message comprises one or more LBT parameters.
7. A method comprising:
receiving, by a first base station from a second base station, a first message comprising one or more first parameters identifying a first plurality of subframes as a listen-before-talk (LBT) subframe of the second base station;
selecting a second plurality of subframes as an LBT subframe by the first base station based on the one or more first parameters;
transmitting, by the first base station to the second base station, a second message comprising one or more second parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe of the first base station;
receiving, by a wireless device from the first base station, at least one radio resource control (RRC) message comprising one or more first parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe; and
monitoring, by the wireless device, a channel of a starting subframe of a burst; and
wherein a burst is configurable to begin in the starting subframe if the starting subframe is identified as an LBT subframe.
8. The method of claim 7 , wherein the one or more first parameters comprise a bitmap.
9. The method of claim 7 , wherein the second plurality of subframes are associated with a licensed assisted access (LAA) cell.
10. The method of claim 7 , wherein the one or more first parameters indicate a periodic pattern for the second plurality of subframes.
11. The method of claim 7 , wherein the at least one RRC message comprises a second parameter indicating a maximum duration for the burst.
12. The method of claim 7 , wherein the at least one RRC message comprises one or more LBT parameters.
13. A base station comprising:
one or more processors; and
memory storing instructions that, when executed, cause the base station to:
receive, from a second base station, a first message comprising one or more first parameters identifying a first plurality of subframes as a listen-before-talk (LBT) subframe of the second base station;
select a second plurality of subframes as an LBT subframe by the base station based on the one or more first parameters;
transmit, to the second base station, a second message comprising second parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe of the base station;
transmit to one or more wireless devices, at least one radio resource control (RRC) message comprising one or more third parameters identifying the second plurality of subframes as a listen-before-talk (LBT) subframe;
perform an LBT procedure in a subframe in the second plurality of subframes; and
transmit a burst when the LBT procedure indicates a clear channel; and
wherein the burst is configurable to start in the subframe if the subframe is identified as an LBT subframe.
14. The base station of claim 13 , wherein the one or more first parameters comprise a bitmap.
15. The base station of claim 13 , wherein the second plurality of subframes are associated with a licensed assisted access (LAA) cell.
16. The base station of claim 13 , wherein the one or more first parameters indicate a periodic pattern for the second plurality of subframes.
17. The base station of claim 13 , wherein the at least one RRC message comprises a second parameter indicating a maximum duration for the burst.