Research On The Efficient Routing Protocol In Wireless Body Area Network

Wire less body area network (WBAN) is a kind of wire less sensor network (WSN)cons ists of wearable or imp lanted biosensors unit for the network node. In particular,it e mphas ized wearable or impla ntable b iosensor size and low power consumption,high reliab ility wire less communication. The latest internationa l trends ind icate thatWBAN as a body sensor network, the hea lth care sector and communicatio ns industr yis becoming a strategic cooperatio n in sc ie ntific research and techno logica l direction.Both internationa l and do mestic, more Number of R&D personne l into the study ofWBAN. Due to the presence of heterogeneous wireless communication environme ntof the huma n body and the movab le sensor node, such a characteristic, high effic ie ncyof wire less routing protocols is essentia l and very ur gent. There fore, this study mainlyfocuses on low-power and the comme nceme nt of highly reliable routing protocol inwire less body area network.Firstly, the thesis brie fly describes the basic concepts of wireless body areanetwork, the inter nationa l and domestic research status of WBAN and the relatedroute protocols and application scenarios. Pointed out the identica ls and differenceswith the wire less sensor networks for the aspects of the channe l propagation model,huma n motion and sensing business divers ity and so on. This thes is summar izedlow-power wire less routing protocol and its progress in recent years, especia lly thewide ly used dyna mic source routing protocol. Ana lys ised routing protocols designtarget that WBAN should obtained. Come to the conclus ion that the existing ro utingprotocols can not meet WBAN Application dema nd which is featured by the var ioussensing bus iness, str ict control o f energy cons umptio n and topology cha ngesfrequently.Secondly, on the bas is of the DSR protocol, this thes is designed adaptive sleepscheduling DSR (ASS-DSR) routing protocol. The algor ithm focuses the improvme ntof the performa nce of low-power comsuption, to take full advantage of the TheWBAN presence of a centra l control node characteristics, the use of centra lizedscheduling node sleep and data transmiss ion time-divis ion multip lexing of radiochanne ls to trans mit data, and also joined the data retrans miss ion mechanis m,enhancethe reliab ility of data trans miss ion. In the same time, the sensor node feedbacksampling freque ncy to the data contro l center node, makes the data contro l centernode to on-dema nd d istr ibution data trans miss ion s lot to the sensing node to take advantage of the wireless channel resources to adapt to WBAN’s business diversityfeatures. The ASS-DSR protocol guarantees node to fa ir access channel, at the sametime, node staying as leep or low power liste ning state as much as possib le to reducethe energy consumption o f each node, in order to achieve the purpos e of the extens ionof network life cyc le.Third ly, WBAN network is deplo yed in the human body, its network topolo gyeasily dyna mically changes by huma n motion. This led to the re liability of datatransmiss io n. To this end, this thes is designed a dyna mic re lay se lectio n protocolbased on Markov decis io n-making process. The agreeme nt took the business pr iorityand residua l energy of the node into account. When fa iled in the data forwarding,based on Markov decis ion process, the cho ice of dynamic energy minimu m cost pathtransmiss io n. This will not only ens ure that the important data nodes and low residua lenergy node will not be too much to forward packets to also be able to make full useof network resources, especia lly energy resources to enhance the reliab i lity of datatransmiss io n and dyna mic topology adaptability. Meanwhile, the protocol a lso uses astate Markov model predictive radio channe l, to further reduce the energycons umptio n of nodes in real time to adjust the trans missio n power.Fina lly, in the N S2simulation platfor m, this thes is did so me s imulatio nalexperiments for the proposed improved algorithm. Experime ntal data show that theimproved a lgor ithm in the power-perfor mance and data trans miss ion reliab ility thanthe origina l a lgor ithm has improved to some exte nt, reached a preliminary applicationrequire ments.