A communication system involves the transmission of information from source to destination and after receiving all the information all the information or a complete signal an acknowledgement is then sent to the source by the destination itself to let the source know that is (destination) has received the signal. In this paper we examine about how to reduce the time of acknowledgement to make the communication faster. In this paper we present a method of sending an acknowledgement signal, in which the last quantum (sample) of the signal is used to compute the time of acknowledgement. The formula for calculating the time of acknowledgement in the case of a continuous time signal and a discrete time signal is also derived in the paper. This technique is applicable for analog communication, digital communication and space communication.