US Patent 10390198 Coverage extension in wireless communication

In a wireless communication system, two cells (cell 1, cell 2) co-exist in the same time/frequency resources with the same Cell ID. The two cells are differentiated by one being a legacy cell and the other being a cell in which coverage extension by means of signal repetition is applied. There is a corresponding difference in broadcast control channels transmitted by a base station (11) providing the two cells, for example a difference in one or more of the contents of the PBCH, or the repetition factor on the PBCH, and/or a difference in a higher-level ID. The second cell is intended for machine type communication where coverage enhancement is required.