An interference suppression method, performed on a communication system comprising a base station or relay and user equipment comprising: sending, on a specified time-frequency resource, a first, downlink, reference signal or a first downlink, reference signal group to an interfered-with end; receiving interfering source information sent by the interfered-with end, wherein the interfering source information comprises an interference identifier used for indicating whether a potential interfering source sending a reference signal on the specified time-frequency resource causes interference to the interfered-with end, the interfering source information is generated by the interfered-with end according to signal strength of the first reference signal or the first reference signal group that is received by the interfered-with end and signal strength of a second, uplink, reference signal or a second, uplink, reference signal group that is sent by the potential interfering source and received on the specified time-frequency resource by the interfered-with end, the interfered-with end and the potential interfering source belong to a same cell or different cells, and the potential interfering source is an interfering source or a non-interfering source, wherein the interfered-with end is a user terminal or a relay station, and the potential interfering source is a user terminal that is located at a cell border and in a neighboring cell of a cell to which the interfered-with end belongs or another user terminal or relay station in a cell to which the interfered-with end belongs; determining, when the interference identifier in the interfering source information indicates that the potential interfering source sending the reference signal on the specified time-frequency resource causes interference to the interfered-with end, that the potential interfering source is an interfering source; and allocating different time-frequency resources to the interfered-with end and the potential interfering source determined as an interfering source. sending, on a specified time-frequency resource, a first, downlink, reference signal or a first downlink, reference signal group to an interfered-with end; receiving interfering source information sent by the interfered-with end, wherein the interfering source information comprises an interference identifier used for indicating whether a potential interfering source sending a reference signal on the specified time-frequency resource causes interference to the interfered-with end, the interfering source information is generated by the interfered-with end according to signal strength of the first reference signal or the first reference signal group that is received by the interfered-with end and signal strength of a second, uplink, reference signal or a second, uplink, reference signal group that is sent by the potential interfering source and received on the specified time-frequency resource by the interfered-with end, the interfered-with end and the potential interfering source belong to a same cell or different cells, and the potential interfering source is an interfering source or a non-interfering source, wherein the interfered-with end is a user terminal or a relay station, and the potential interfering source is a user terminal that is located at a cell border and in a neighboring cell of a cell to which the interfered-with end belongs or another user terminal or relay station in a cell to which the interfered-with end belongs; determining, when the interference identifier in the interfering source information indicates that the potential interfering source sending the reference signal on the specified time-frequency resource causes interference to the interfered-with end, that the potential interfering source is an interfering source; and allocating different time-frequency resources to the interfered-with end and the potential interfering source determined as an interfering source.