Cognitive radio emerges as an impactful technology that can enhance the radio spectrum utilization and network performance. Spectrum handoff is one of the important feature in cognitive radio network that not only contributes required QoS to primary users but also provide seamless communication for secondary users. Spectrum handoff occurs when the primary user claims the channel occupied by the secondary user, since the secondary users are unlicensed users having no right to access the channel thus secondary user is required to vacate the channel and resume its transmission to the next available idle channel.