The creation of Wireless Body Area Networks has been enabled by recent advancements in wearable computing and wearable sensor devices (WBANs). The wireless body area network consists of remotely linked miniaturised sensors mounted in, on or around the human body, providing continuous monitoring of physiological signs to support applications for medicine, lifestyle and entertainment. We propose a secure, power-efficient and high-throughput routing protocol for Wireless Body Area Networks in this research work. To achieve minimum energy consumption and longer network lifespan, we use multi-hop topology. In order to pick the parent node or forwarder, we propose a cost function. A parent node with high residual energy and a minimum distance to sink is selected by the pro-posed cost function. The residual energy parameter balances the energy consumption between sensor nodes, while the distance parameter ensures that the packet is transmitted successfully to the sink.
                                
                                
                                    
                                    Patient monitoring, Wireless body area networks, Health care Applications, WSN etc
                                
                                
                                
                                
                                    
                                        
                                        
                                        
                                        
                                            
                                                
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