Designing energy efficient data transmission protocol has a significant influence on the energy performance of Wireless Sensor Network (WSN). A set of isolated urban areas (e.g. urban parks or building blocks) covered by Sensor Nodes (SNs) monitoring environmental parameters (e.g., pollution, fire detection, light intensity, temperature, moisture, surveillance etc.). Mobile Sinks (MSs) are fixed upon the public vehicles with fixed trajectories (e.g. buses) to collect the sensory data from WSN fields. Within the MS's range the existing system involve either single-hop transfer of data from SNs involving in data retrieval, processing, buffering and delivering tasks.