Wireless Personal Area Networks (WPANs) - a network for interconnecting devices between Wireless Sensor Network. The standard IEEE 802.15.4 intends to offer the fundamental lower network layers of a type of WPANs which focuses on low-cost, lowspeed ubiquitous communication between devices. The Hidden Device Problem (HDP) results in inefficient data transmission and serious power consumption issues in WPAN. A Cross-layer scheme is used in order to overcome the hidden terminal problem. The address is detected in the PHYsical (PHY) layer and the detected device address is added to the hidden device Address List (AL).In the Medium Access Control (MAC) layer the hidden devices are scheduled to access the channel by exclusively allocating time slots in different sub periods. Transmission range is increased using the favorable energy efficiency.