the present invention relates to the field of mobility in heterogeneous wireless networks . in particular , the invention proposes a system and method of providing user equipment initiated and assisted backward handover in the heterogeneous wireless networks . depending on certain criteria , the ue may decide that if it needs a handover from a serving network to a target network . the ue initiates the backward handover by sending handover request message to the target network through the serving network . the serving network checks for the capabilities of the ue and authorizes the backward handover . the target network prepares for the backward handover and informs the ue when the target network is ready . the ue then starts the handover procedure .