Small bandwidth cell configuration, for reducing interference with overlapping large bandwidth cell

A nontransitory computer readable storage medium, having thereon a computer program comprising program instructions, the computer program being loadable into a data-processing unit and adapted to cause execution of a method when the computer program is run by the data-processing unit, wherein the method is of a network node of a cellular communication system for configuring a first cell of the cellular communication system in relation to a second cell of the cellular communication system, wherein a coverage area of the first cell and a coverage area of the second cell at least partly overlap, wherein the first cell is to be provided by a first base station of the cellular communication system and has a first bandwidth, and wherein the second cell is provided by a second base station of the cellular communication system and has a second bandwidth which is larger than the first bandwidth, and wherein the method comprises:

• determining an offset between a first carrier frequency of the first cell and a second carrier frequency of the second cell, wherein a first spectrum range defined by the first carrier frequency and the first bandwidth is comprised within a second spectrum range defined by the second carrier frequency and the second bandwidth, and wherein the offset is determined such that control signaling of the second cell is aligned with control signaling of the first cell to reduce an impact of interference between the control signaling of the first cell and the control signaling of the second cell;
• configuring the first base station to provide the first cell based on the first carrier frequency;
• determining a need for data communication of the first cell during a particular time interval;
• determining a time-frequency resource to be used by the control signaling of the first cell to convey a radio resource allocation in the particular time interval for the data communication of the first cell;
• preventing the control signaling of the second cell from using the time-frequency resource;
• and
• transmitting the control signaling of the first cell that conveys the radio resource allocation.

An arrangement for a network node of a cellular communication system for configuring a first cell of the cellular communication system in relation to a second cell of the cellular communication system, wherein a coverage area of the first cell and a coverage area of the second cell at least partly overlap, wherein the first cell is to be provided by a first base station of the cellular communication system and has a first bandwidth, and wherein the second cell is provided by a second base station of the cellular communication system and has a second bandwidth which is larger than the first bandwidth, the arrangement comprising:

• a carrier frequency offset determiner adapted to determine an offset between a first carrier frequency of the first cell and a second carrier frequency of the second cell, wherein a first spectrum range defined by the first carrier frequency and the first bandwidth is comprised within a second spectrum range defined by the second carrier frequency and the second bandwidth, and wherein the offset is determined such that control signaling of the second cell is aligned with control signaling of the first cell to reduce an impact of interference between the control signaling of the first cell and the control signaling of the second cell;
• a cell configurer adapted to configure the first base station to provide the first cell based on the first carrier frequency;
• and
• a scheduler adapted to:
• determine a need for data communication of the first cell during a particular time interval;
• determine a time-frequency resource to be used by the control signaling of the first cell to convey a radio resource allocation in the particular time interval for the data communication of the first cell;
• prevent the control signaling of the second cell from using the time-frequency resource;
• and
• cause a transmitter of the first base station to transmit the control signaling of the first cell that conveys the radio resource allocation.