Metric-based Rate Control for Transport Protocols in Multi-hop Wireless Networks

• Main Author: Duong, Le Minh
• Language: ENG
• Published: Université Paris Sud - Paris XI 2012
• Subjects: [PHYS:COND:CM_GEN] Physics/Condensed Matter/Other; Multihop wireless network; Metric; Classification; Cross-layer; Transport layer; MAC layer; Rate control
• Online Access: http://tel.archives-ouvertes.fr/tel-00726025; http://tel.archives-ouvertes.fr/docs/00/72/60/25/PDF/VD2_DUONG_LEMINH_12072012.pdf

In recent years, Multi-hop Wireless Networks (MHWNs) have experienced an explosion of deployment due to the increasing demand for continuous connectivity regardless of the physical location. Internet predominant transport protocols, i.e. Transmission Control Protocol (TCP), face performance degradation in MHWNs because of the high loss and link failure rates. Several solutions have been proposed which are based on network state estimation or use information from MAC layer (called metrics) in a cross-layer manner to better comprehend the network state. The first part of this thesis provides a survey and comprehensive definition of common metrics from Physical, MAC, Network and Transport layers and thus provides a multi-criteria and hierarchical classification. After that, the effectiveness in reflecting network information of MAC metrics is also investigated in a systematic way by simulating various network situations and measuring the MAC metrics. Thus, the good MAC metric for congestion control which is coupled with the network contention level and the medium induced losses will be found out. From the results of the effectiveness study, new rate control schemes for transport protocols are proposed which adapt efficiently the source bit rate depending on the network condition provided by some MAC metrics. Through an extensive set of simulations, the performance of the proposed rate control schemes in MHWNs is investigated thoroughly with several network situations.