A first network node for providing timing information concerning at least one other network node to at least one mobile station, which first network node comprises: a processor, configured for determining timing information for periodic monitoring of at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, based on time-frequency characteristics of said at least one downlink signal transmitted by said at least one other network node to be monitored; and a transmitter, configured for transmitting a signal comprising said timing information, associated with periodic monitoring of said at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, to the at least one mobile station; wherein said timing information comprises at least one of: a starting time (to) of monitoring of said at least one downlink signal, a monitoring periodicity of monitoring of said at least one downlink signal, a monitoring time window of monitoring of said at least one downlink signal, and an ending time of monitoring of said at least one downlink signal; a receiver, configured for receiving, from the at least one mobile station, an indication of a set of timing information for periodically monitoring the at least one other network node operating in discontinuous transmission mode, which set has been selected by the mobile station; and wherein the processor is further configured for determining timing information for the periodic monitoring of said at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, based on the received indication of said set of timing information. a processor, configured for determining timing information for periodic monitoring of at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, based on time-frequency characteristics of said at least one downlink signal transmitted by said at least one other network node to be monitored; and a transmitter, configured for transmitting a signal comprising said timing information, associated with periodic monitoring of said at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, to the at least one mobile station; wherein said timing information comprises at least one of: a starting time (to) of monitoring of said at least one downlink signal, a monitoring periodicity of monitoring of said at least one downlink signal, a monitoring time window of monitoring of said at least one downlink signal, and an ending time of monitoring of said at least one downlink signal; a receiver, configured for receiving, from the at least one mobile station, an indication of a set of timing information for periodically monitoring the at least one other network node operating in discontinuous transmission mode, which set has been selected by the mobile station; and wherein the processor is further configured for determining timing information for the periodic monitoring of said at least one downlink signal transmitted by said at least one other network node operating in discontinuous transmission mode, based on the received indication of said set of timing information.