Research On Key Technology Of Body Area Nanonetworks

The nanonetwork is a bio-inspired and distributed wireless communication network which enables information exchanging by molecular communication.The molecular communication nanonetworks can be widely applied into the bio-medical,military,environmental and manufacturing fields.At the early researching stage,the application oriented way will help exploring how to establish the network architecture,e.g.,topology,protocol stack and interconnection between the different signal systems,because the nanonetworks is essentially different from the traditional wireless network from the aspects of node capability,communication paradigm and network property and so on.Furthermore,the high-bio-inspired molecular communication nanonetwork is called 'a natural body area network(BAN)' which can solve the medical problem at molecular level or cellular level,because the molecular communication technology which is inspired by the exchange of material between bio-cells is able to prominently transmit information in vivo.Based on the establishment of network platform,communication characteristics and development of applying technologies,this paper aims at the nanonetwork technologies in the bio-medical application field to research the body area nanonetworks,which includes:(1)The architecture research of body area nanonetwork.The topology of body areananonetworks is first proposed,which can construct a large-scale body area nanonetwork by combining the short-range MC and the medium-range MC.To satisfy the large-scale networks and complex application environment in human body,the framework of protocol stack is then proposed which is composed of network management mechanisms,communication protocols and application technologies.To achieve the system interconnection between nanonetworks based on chemical signal and traditional networks based on electromagnetic signal,and then support nanonetwork performance and management,the converting technology between electrical signal and chemical signal is finally proposed.(2)The topology control mechanism research of body area nanonetworks.To construct the network topology and then design the high-layer network protocol,the system model of nanonetworks based on the medium-range molecular communication is proposed,which can systematically and abstractly describe the communication architecture in a viewpoint of network layer.To achieve the optimal data link and support network protocols and network applications,the topology control algorithm based on the shortest path,the best path and the optimal path are proposed respectively based on the system model,which can construct the optimal data link according to link length,link quality and the balance of them.(3)The routing protocol research of body area nanonetworks.The concentration-aware routing protocol in the short molecular communication nanonetworks is firstly proposed,which choose the data path from the source nanomachine to the nanosink based on the concentration gradient of diffused molecules.To satisfy application in the large-scale nanonetworks,the concentration-aware routing protocol combined with Quorum Sensing mechanism is then proposed,which can schedule some nanomachines to initialize the routing protocol with nanosink together.To optimize the data link quality,a concentration-aware contention routing protocol combined with the multi-communication interface architecture of nanomachines is finally proposed,which can improve the probability of data transmission by avoiding the signal collision.(4)The technology research of physiological abnormality detection system in body area nanonetworks.Based on the nano-abnormality detection model in the biological area as well as combination with the property of body area nanonetworks,a physiological abnormality detection system of body area nanonetworks is designed,which can firstly detect the abnormal cells in bio-environment by the cooperation of nanoactruators and nanosensors based on the specific feature of abnormality detection.In the process of transferring the detection results by nanonetwork,the data fusion can achieve based on the area feature of the detection results to effectively reduce the communication traffic.The detection results are finally converged on the nanosink which then makes decision and responds to the detection results based on the specific decision rules.