| CPC H04W 36/0061 (2013.01) [H04L 5/0091 (2013.01); H04L 27/0006 (2013.01); H04W 16/14 (2013.01); H04W 36/00835 (2018.08); H04W 74/0808 (2013.01); H04L 5/0051 (2013.01); H04L 5/0053 (2013.01); H04W 72/23 (2023.01); H04W 74/002 (2013.01); Y02D 30/70 (2020.08)] | 20 Claims |

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1. A method comprising:
receiving, by a first base station from a second base station, cell configuration parameters of one or more cells of the second base station, the cell configuration parameters comprising:
at least one first information element (IE) indicating a first identifier of a first cell of the one or more cells;
at least one second IE indicating that the first cell is an unlicensed cell;
at least one third IE indicating a radio frequency channel number of the unlicensed cell; and
at least one fourth IE indicating a bandwidth of the unlicensed cell; and
sending, to the second base station, a request message for adding the second base station as a secondary base station for a wireless device after receiving the cell configuration parameters.
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