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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Proceedings ArticleDOI
Adaptive MAC-layer protocol for multiservice digital access via tree and branch communication networks
Sriram Kotikalapudi,Chia-Chang Li,Peter D. Magill,Norman Ashton Whitaker,James E. Dail,Miguel A. Dajer,Curtis A. Siller +6 more
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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