A wireless device may receive system information comprising a parameter indicating a number of paging sub-groups. The wireless device may determine that the wireless device is associated with a first paging sub-group based on the number and a wireless device identifier. The wireless device may receive a DCI indicating first paging sub-group(s) for a paging occasion. The wireless device may monitor a control channel in the paging occasion in response to the first paging sub-group(s) comprising the first paging sub-group. The wireless device may receive paging information.