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Control-plane functions are migrating from dedicated network equipment into software running on commodity hardware. The Software- Defined Access Network (SDAN) concept introduced here extends the benefits of Software- Defined Networking and Network Function Virtualization (NFV) into broadband access. In a SDAN, access-network control and management functions for broadband access are virtualized, to...
Very-high rate Digital Subscriber Lines (VDSL) are beginning to be deployed by competitive network operators. Short lines can radiate high power crosstalk into long lines hence the power transmitted on the short lines should be controlled to limit the degradation they may cause to a competitor's long lines. This paper presents a new method of enhanced upstream power backoff (eUPBO). eUPBO limits the...
This paper examines the burgeoning impact of peer-to-peer (P2P) traffic IP video traffic. High-quality IPTV or Internet TV has high-bandwidth requirements, and P2P IP video could severely strain broadband networks. A model for the popularity of video titles is given, showing that some titles are very popular and will often be available locally; making localized P2P attractive for video titles. The...
Digital Subscriber Lines (DSL) transmit over twisted-pair telephone loops, and knowledge of the loop make-up is vital for determining what types of DSLs may be deployed and what bit rates they may transmit. Single-ended automatic loop identification (LID) is essential for achieving low-cost deployment of DSL, since it allows loops to be qualified in bulk and does not involve any human intervention...
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