Configuration parameters for a random access channel of a base station
A first base station receives, from a second base station, cell information of a second cell of the second base station. The cell information indicates a subcarrier spacing associated with the second cell. Based on the cell information, configuration parameters are determined for a random access channel of a first cell of the first base station. The first base station transmits configuration parameters to a wireless device.
1. A method comprising:
receiving, by a first base station from a second base station, cell information of a second cell of the second base station, wherein the cell information indicates a subcarrier spacing associated with the second cell;
determining, by the first base station and based on the cell information, configuration parameters for a random access channel of a first cell of the first base station; and
transmitting, by the first base station to a wireless device, the configuration parameters.
2. The method of claim 1 , wherein the subcarrier spacing is associated with a bandwidth part of the second cell.
3. The method of claim 1 , wherein the subcarrier spacing is associated with an initial bandwidth part of the second cell.
4. The method of claim 1 , wherein the subcarrier spacing is associated with a random access resource of the second cell.
5. The method of claim 1 , wherein the cell information comprises at least one of:
a cell identifier of the second cell; or
frequency information of a random access resource of the second cell, wherein the frequency information of the random access resource comprises at least one of:
a parameter indicating a frequency offset; or
a parameter indicating a bandwidth.
6. The method of claim 1 , wherein the configuration parameters comprise a first subcarrier spacing associated with the first cell.
7. The method of claim 1 , wherein the configuration parameters comprise at least one of:
a frequency offset; or
a bandwidth.
8. The method of claim 1 , wherein the configuration parameters comprises at least one of:
a cyclic prefix parameter indicating whether to use an extended cyclic prefix;
a direct current location parameter;
a downlink control information detection parameter for a physical downlink shared channel reception timing;
a physical downlink shared channel reception parameter for a hybrid automatic repeat request-acknowledgment transmission timing; or
a downlink control information detection parameter for a physical uplink shared channel transmission timing.
9. The method of claim 1 , further comprising receiving, by the first base station from the wireless device, a random access preamble via the random access channel.
10. The method of claim 1 , further comprising transmitting, by the first base station to the second base station, the configuration parameters for the random access channel of the first cell.
11. A first base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first base station to:
receive, from a second base station, cell information of a second cell of the second base station, wherein the cell information indicates a subcarrier spacing associated with the second cell;
determine, based on the cell information, configuration parameters for a random access channel of a first cell of the first base station; and
transmit, by the first base station to a wireless device, the configuration parameters.
12. The first base station of claim 11 , wherein the cell information comprises at least one of:
a cell identifier of the second cell; or
frequency information of a random access resource of the second cell, wherein the frequency information of the random access resource comprises at least one of:
a parameter indicating a frequency offset; or
a parameter indicating a bandwidth.
13. The first base station of claim 11 , wherein the subcarrier spacing is associated with a random access resource of the second cell.
14. The first base station of claim 11 , wherein the subcarrier spacing is associated with a bandwidth part of the second cell.
15. The first base station of claim 11 , wherein the subcarrier spacing is associated with an initial bandwidth part of the second cell.
16. The first base station of claim 11 , wherein the configuration parameters comprise a first subcarrier spacing associated with the first cell.
17. The first base station of claim 11 , wherein the configuration parameters comprise at least one of:
a frequency offset; or
a bandwidth.
18. The first base station of claim 11 , wherein the configuration parameters comprises at least one of:
a cyclic prefix parameter indicating whether to use an extended cyclic prefix;
a direct current location parameter;
a downlink control information detection parameter for a physical downlink shared channel reception timing;
a physical downlink shared channel reception parameter for a hybrid automatic repeat request-acknowledgment transmission timing; or
a downlink control information detection parameter for a physical uplink shared channel transmission timing.
19. The first base station of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the first base station to receive, from the wireless device, a random access preamble via the random access channel.
20. A system comprising:
a second base station; and
a first base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first base station to:
receive, from the second base station, cell information of a second cell of the second base station, wherein the cell information indicates a subcarrier spacing associated with the second cell;
determine, based on the cell information, configuration parameters for a random access channel of a first cell of the first base station; and
transmit, by the first base station to a wireless device, the configuration parameters.