{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,21]],"date-time":"2025-04-21T04:12:17Z","timestamp":1745208737411,"version":"3.40.4"},"reference-count":35,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2012,11,9]],"date-time":"2012-11-09T00:00:00Z","timestamp":1352419200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Communication"],"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>The IEEE 802.16j Mobile Multihop Relay (MMR) WiMAX network allows the number of hops between the end user and the base station to be more than two hops. It supports non\u2010real\u2010time Polling Service, which considers the minimum reserved rate and the maximum sustained rate as a QoS requirements. The reliability of sending the data over MMR WiMAX is achieved by using Transmission Control Protocol (TCP) in transport layer and automatic repeat request in the link layer. However, the use of automatic repeat request in the link layer makes the round trip time fluctuate rapidly, which increases the possibility of retransmission timeout (RTO) expiration. TCP performance degrades because of frequent timeout, and hence the QoS transmission rates cannot be satisfied. Therefore, this paper presents an RTO smoothing scheme and QoS aware transmission control to enhance the performance of data transmission over MMR WiMAX networks. The RTO smoothing scheme aims to reduce the frequent timeout occurrences. The slow start threshold and maximum congestion window are adjusted to satisfy the required QoS and it provides transmission rate fairness for the users at different hops. The results showed that, the proposed schemes reduce the timeout, and improve the utilization of the allocated resources and TCP throughput. Copyright \u00a9 2012 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/dac.2434","type":"journal-article","created":{"date-parts":[[2012,11,9]],"date-time":"2012-11-09T09:32:33Z","timestamp":1352453553000},"page":"1766-1782","source":"Crossref","is-referenced-by-count":0,"title":["QoS aware transmission control scheme for multihop\u2009WiMAX\u2009network"],"prefix":"10.1002","volume":"27","author":[{"given":"Fath Elrahman","family":"Ismael","sequence":"first","affiliation":[{"name":"Department of Communications Faculty of Engineering, SUST University P. O. Box 72 Khartoum Sudan"}]},{"given":"Sharifah K.","family":"Syed Yusof","sequence":"additional","affiliation":[{"name":"CoE Telecommunication Technology Universiti Teknologi Malaysia (UTM) Johor 81310 UTM Skudai Malaysia"}]},{"given":"Mazlan","family":"Abbas","sequence":"additional","affiliation":[{"name":"Wireless Communication Cluster MIMOS Berhad Kulalumpur Malaysia"}]},{"given":"N.M.","family":"Abdul Latiff","sequence":"additional","affiliation":[{"name":"CoE Telecommunication Technology Universiti Teknologi Malaysia (UTM) Johor 81310 UTM Skudai Malaysia"}]},{"given":"Norsheila","family":"Fisal","sequence":"additional","affiliation":[{"name":"CoE Telecommunication Technology Universiti Teknologi Malaysia (UTM) Johor 81310 UTM Skudai Malaysia"}]}],"member":"311","published-online":{"date-parts":[[2012,11,9]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2009.5273815"},{"key":"e_1_2_7_3_1","unstructured":"IEEE802.16j\u20102009.IEEE standard for Local and Metropolitan Area Networks \u2013 Part 16 Air Interface for Fixed Broadband Wireless Access Systems \u2013 Multihop Relay Specification May2009."},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/dac.1068"},{"key":"e_1_2_7_5_1","unstructured":"2011 Springer Berlin \/ Heidelberg L Liang Y Chen Z Sun D Kouvatsos Characterisation of Internet Traffic in Wireless Networks in Network Performance Engineering 191 202"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/248157.248180"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/235160.235162"},{"key":"e_1_2_7_8_1","doi-asserted-by":"crossref","unstructured":"MoJ LaRJ AnantharamV WalrandJ.Analysis and comparison of TCP Reno and Vegas.Proceedings of the Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies. 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