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In this paper, we propose a routing algorithm, called DCRA, which divides the urban map into grids; fixed sink stations are established in specific grids such that the communication range of each fixed sink station can cover a specific number of grids; these grids are defined as a cluster and allocated a number of tokens in each cluster; the tokens in the cluster are controlled by the fixed sink station. A node will transmit messages to a relay node that has a larger remaining buffer size and encounters fixed sink stations or the destination node more frequently after it obtains a message transmit token. Simulation experiments are carried out to verify the performance of the DCAR under an urban scenario, and results show that the DCAR algorithm is superior to existing routing algorithms in terms of delivery ratio, average delay, and network overhead.<\/jats:p>","DOI":"10.1155\/2017\/6523076","type":"journal-article","created":{"date-parts":[[2017,5,30]],"date-time":"2017-05-30T17:05:56Z","timestamp":1496163956000},"page":"1-9","source":"Crossref","is-referenced-by-count":5,"title":["DCAR: DTN Congestion Avoidance Routing Algorithm Based on Tokens in an Urban Environment"],"prefix":"10.1155","volume":"2017","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9141-6949","authenticated-orcid":true,"given":"Hezhe","family":"Wang","sequence":"first","affiliation":[{"name":"College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1917-3978","authenticated-orcid":true,"given":"Hongwu","family":"Lv","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huiqiang","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangsheng","family":"Feng","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"issue":"2","key":"1","doi-asserted-by":"crossref","first-page":"868","DOI":"10.1109\/COMST.2014.2375340","volume":"17","year":"2015","journal-title":"IEEE Communications Surveys & Tutorials"},{"journal-title":"Advances in Delay-Tolerant Networks (DTNs)","first-page":"1","year":"2015","key":"3"},{"journal-title":"IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems","first-page":"1","year":"2016","key":"4"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.5370\/KIEE.2016.65.1.135"},{"journal-title":"Journal of Network & Computer Applications","first-page":"208","year":"2015","key":"6"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1002\/dac.2796"},{"key":"9","first-page":"331","volume":"5","year":"2012","journal-title":"Journal of Internet Engineering"},{"issue":"9","key":"11","volume":"5","year":"2010","journal-title":"Plos One"},{"issue":"3","key":"13","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1145\/961268.961272","volume":"7","year":"2003","journal-title":"Acm Sigmobile Mobile Computing & Communications Review"},{"issue":"8","key":"15","doi-asserted-by":"crossref","first-page":"1301","DOI":"10.1016\/j.jss.2010.01.029","volume":"83","year":"2010","journal-title":"Journal of Systems & Software"},{"key":"17","doi-asserted-by":"publisher","DOI":"10.1016\/j.inffus.2011.11.003"},{"key":"18","doi-asserted-by":"publisher","DOI":"10.1016\/j.jksuci.2017.01.001"},{"key":"20","doi-asserted-by":"publisher","DOI":"10.1109\/MITS.2013.2267625"},{"issue":"1","key":"21","doi-asserted-by":"crossref","first-page":"1","DOI":"10.4236\/wsn.2012.41001","volume":"4","year":"2012","journal-title":"Wireless Sensor Network"},{"key":"22","doi-asserted-by":"publisher","DOI":"10.1007\/s11277-015-2330-5"},{"issue":"1","key":"23","first-page":"26","volume":"3","year":"2002","journal-title":"Journal of Air Force Engineering University (Natural Science Edition)"},{"journal-title":"Special Assignment Report","year":"2008","key":"24"}],"container-title":["Journal of Sensors"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/6523076.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/6523076.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2017\/6523076.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,5,30]],"date-time":"2017-05-30T17:06:34Z","timestamp":1496163994000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/js\/2017\/6523076\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017]]},"references-count":17,"alternative-id":["6523076","6523076"],"URL":"https:\/\/doi.org\/10.1155\/2017\/6523076","relation":{},"ISSN":["1687-725X","1687-7268"],"issn-type":[{"type":"print","value":"1687-725X"},{"type":"electronic","value":"1687-7268"}],"subject":[],"published":{"date-parts":[[2017]]}}}