Journal ArticleDOI
Adaptive digital access protocol: a MAC protocol for multiservice broadband access networks
James E. Dail,M.A. Dajer,Chia-Chang Li,Peter Magill,Curtis A. Siller,Kotikalapudi Sriram,Norman Ashton Whitaker +6 more
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TLDR
The authors describe a protocol that can adapt to the changing demands of a mix of synchronous transfer mode (STM) and asynchronousTransfer mode (ATM) applications and efficiently allocate bandwidth to a variety of bursty traffic sources and its performance with respect to throughput, latency, and bandwidth efficiency is examined.Abstract:
The authors describe a protocol that can adapt to the changing demands of a mix of synchronous transfer mode (STM) and asynchronous transfer mode (ATM) applications and efficiently allocate bandwidth to a variety of bursty traffic sources. In the case of a hybrid fiber-coaxial (HFC) network, the protocol resides in customer premises equipment (CPE) and a common head-end/central-office (HE/CO) controller. A medium-access control (MAC) processor provides for dividing the time domain for a given digital bitstream into successive frames, each with multiple STM and ATM time slots. Within the STM region of a frame, variable-length time slots are allocated to calls (e.g., telephony, video telephony) requiring different amounts of bandwidth. In the upstream channels, a contention access signaling time slot is also provided in the STM region for call control and setup requests. Within the ATM region, fixed-length time slots accommodate one individual ATM cell. These ATM time slots may be reserved for a user for either the duration of a call or a burst of successive ATM cells, or shared via a contention process. At least one contention time slot is available for signaling messages related to ATM call control and setup requests. The MAC-layer protocol, its relation to circuit- and ATM-amenable applications, and its performance with respect to throughput, latency, and bandwidth efficiency for several service scenarios are examined.read more
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Patent
Data packet fragmentation in a wireless communication system
Thomas J. Quigley,Jonathan S. Min,Lisa V. Denney,Henry Samueli,Sean F. Nazareth,Feng Chen,Fang Lu,Christopher R. Jones +7 more
TL;DR: In this article, a number of features for enhancing the performance of a wireless communication system, in which data is transmitted between a central node and a plurality of subscriber nodes located remotely with respect to the central node, are presented.
Journal ArticleDOI
Enhanced throughput efficiency by use of dynamically variable request minislots in MAC protocols for HFC and wireless access networks
TL;DR: An algorithm for dynamically varying the number of minislots as a function of the traffic mix is proposed and shown to have the highest throughput efficiency amongst the different alternatives.
Patent
Sharing IP network resources
Jeremy T. Johnson,Milo S. Medin +1 more
TL;DR: In this paper, a system and method for sharing access to an internet protocol (IP) network among multiple internet service providers (ISPs) uses multiprotocol label switching (MPLS).
Patent
Robust Techniques for Upstream Communication Between Subscriber Stations and a Base Station
Thomas J. Quigley,Jonathan S. Min,Lisa V. Denney,Henry Samueli,Sean F. Nazareth,Feng Chen,Fang Lu,Christopher R. Jones +7 more
TL;DR: In this article, a number of features for enhancing the performance of a communication system, in which data is transmitted between a base station and a plurality of subscriber stations located different distances from the base station, are presented.
Patent
Method and apparatus for reliable operation of universal voice grade cards
Eames Thomas R,Trinh Lac X,E. Barton Manchester,Bradley N. Yearwood,David J. Manley,Scott T. Hicks,Jaskarn S. Johal,Charles A. Eldering +7 more
TL;DR: A fiber-to-curb communication system providing telephone service to subscribers using line cards which are pluggable into a broadband network unit is described in this paper, where the cards are programmable from a central location, and the system includes self-testing of the cards, ring generator testing and provides for testing of the telephone lines from the system to the subscriber's location.
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Proceedings ArticleDOI
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TL;DR: An adaptive MAC-layer protocol that supports multiservice (STM and ATM) applications in the context of subscriber access to tree and branch networks, and its performance with respect to signaling throughput and latency, and bandwidth efficiency for several service scenarios is described.
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