A method performed by a communication device for determining an extended time period related to a Non Access Stratum, NAS, signalling message between a core network node and the communication device in a wireless communications network , the method comprising: obtaining an indication of a coverage capability of the communication device , wherein the indication of the coverage capability is an indication that the communication device operates according to a coverage extension of a Radio Access Technology, RAT; obtaining an indication of a time period, which time period is related to the signalling message and may be used for communication devices that do not operate according to coverage extension; and determining the extended time period related to the signalling message , based on the indication of the coverage capability of the communication device and based on the indication of the time period, wherein determining the extended time period comprises: determining a multiplicative factor for multiplying the time period, based on the obtained indication of the coverage capability of the communication device ; and determining the extended time period based on the multiplicative factor and the obtained indication of the time period, and wherein a timer based on the extended time period is started when the signalling message is transmitted, and the timer is stopped in response to a received response to the signalling message , and wherein the multiplicative Z factor is further based on an amount of data or a number of signals comprising the signalling message , that needs to be transmitted between the communication device and the core network node in both uplink and downlink in a time interval defined by a start and a stop of the timer. obtaining an indication of a coverage capability of the communication device , wherein the indication of the coverage capability is an indication that the communication device operates according to a coverage extension of a Radio Access Technology, RAT; obtaining an indication of a time period, which time period is related to the signalling message and may be used for communication devices that do not operate according to coverage extension; and determining the extended time period related to the signalling message , based on the indication of the coverage capability of the communication device and based on the indication of the time period, wherein determining the extended time period comprises: determining a multiplicative factor for multiplying the time period, based on the obtained indication of the coverage capability of the communication device ; and determining the extended time period based on the multiplicative factor and the obtained indication of the time period, and determining a multiplicative factor for multiplying the time period, based on the obtained indication of the coverage capability of the communication device ; and determining the extended time period based on the multiplicative factor and the obtained indication of the time period, and wherein a timer based on the extended time period is started when the signalling message is transmitted, and the timer is stopped in response to a received response to the signalling message , and wherein the multiplicative Z factor is further based on an amount of data or a number of signals comprising the signalling message , that needs to be transmitted between the communication device and the core network node in both uplink and downlink in a time interval defined by a start and a stop of the timer. <EOS>