S. Lekcharoen and C. Jittawiriyanukoon (Thailand)
ADSL, HDSL, VDSL and Policing mechanisms.
: Internet, Video on demand, Video Teleconferencing and other high bandwidth required applications are now common services on telecommunications network. To meet these demand for bandwidth, technology of choice used to employ the next generation networks is Digital Subscriber Line (DSL) technology, which is a modem technology using existing twisted-pair telephone lines to transport high-bandwidth data, such as multimedia and video, to service subscribers. The term xDSL covers a number of similar yet competing forms of DSL, including ADSL, SDSL, HDSL, RADSL, and VDSL. However, VDSL is drawing significant attention from implementers and service providers as it guarantees to deliver high-bandwidth data rates to dispersed locations with little changes to the existing infrastructure. VDSL services are dedicated, point-to-point, public network access over twisted-pair copper wire. In this paper we evaluate and compare the performance of four policing mechanisms, namely: Leaky Bucket (LB), Jumping Window (JW) and Triggered Jumping Window (TJW) and no-policing VDSL (Plain VDSL). We allow a burst traffic stream (ON/OFF stream) to fluctuate our VDSL network with/without policing mechanisms. Simulation results show policing mechanisms help improve performance of VDSL network against non-policing one while various types of burst traffic are generated.
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