Lucent Technologies Inc.

Johns Hopkins University

Broadwing Corporation

Alcatel-lucent USA Inc.

Level 3 Communications, LLC

Lotfi Benmohamed

Wing Cheong Lau

Subrahmanyam Dravida

Paramasiviah Harshavardhana

Ajay Kumar Mittal

Yung-Terng Wang

Marian Trnkus

Jonathan L Weston-Dawkes

Stefano Baroni

Jean-Luc Ronarc'h

Muralidharan Sampath Kodialam

William P D'Amico

Osama I Farrag

Young-Terng Wang

Qinqing Zhang

Joseph G Kneuer

Bharat T Doshi

Ahmed G Mokhtar

A communication device includes a transmitter portion, a receiver portion and a management portion. The transmitter portion transmits information into a channel. The receiver portion receives information from the channel. The management portion includes a request-to-send packet generating portion, a clear-to-send packet receiving portion, a threshold database, a comparator and a resolution packet generating portion. The threshold database stores a threshold value for the parameter of the channel and provides the threshold value to the comparator. The comparator compares the threshold value and the channel parameter information and generates an instruction signal based on the comparison. The resolution packet generating portion generates a resolution packet based on the instruction signal and provides the resolution packet to the transmitter portion.

System and methods for distributed medium access control and QOS scheduling in mobile ad-hoc networks

Optical communications systems including grooming, protection, restoration, and migration on a unified network platform, and using a unified control plane. The systems may include combinations of optical bypass and mesh restoration, may include combinations of shared mesh and dedicate protection, and may be combinations of long haul, extended long haul, and ultra long haul systems. The systems may also include a configurable DWDM tier to accommodate dynamic traffic patterns, thereby allowing for increased operational flexibility.

Optical transmission systems, devices, and methods

A method of operating a decentralized ad-hoc wireless network including wireless stations, comprises establishing a common time reference which is used by the wireless stations to share access to a common wireless channel, the common time reference having a periodic superframe structure including a Scheduled Beacon Period, a Contended Beacon Period, Contention Periods (CPs) and Contention Free Periods (CFPs). The method further comprises time-scheduling, using wireless communication between the wireless stations, the CFPs in the SBTT interval to at least some of the wireless stations requesting access to the CFPs, and granting access to the CPs to at least some of the wireless stations requesting access to the CPs.

Decentralized media access control for ad-hoc mobile wireless network

The method estimates a capacity requirement as a function of a cell loss ratio (CLR) requirement, estimates a capacity requirement as a function of the a cell delay variation (CDV) requirement, and sets the capacity requirement based on these independent estimates. The capacity requirement is then used to determine connection admission control in the network.

Connection admission control for bursty real-time traffic in a network with multiple service classes

Methods, systems, and devices utilizing port dimensioning strategies for supporting, for example, bandwidth-on-demand ('BoD') services in networks. At a given node, the traffic load consists of several components, such as an access component, which is generated by demands terminated at that node, and a transit component, which is generated by demands that transit electronically through the node. Given the BoD load at a node, as well as a target BoD average blocking probability, a desired static allocation of the ports is provided between ports of a first type (such as client-side ports) and ports of a second type (such as network-side ports). In addition, a dynamic sharing strategy of the ports is also disclosed.

Systems, devices, and methods utilizing port dimensioning strategies

Methods and apparatus are provided for designing IP networks with substantially improved performance as compared to existing IP networks such as, for example, those networks designed under best-effort criteria. Particularly, the invention includes methods and apparatus for: computing worst-case and optimistic link capacity requirements; optimizing network topology; and determining router placement within a network.

Network topology optimization methods and apparatus for designing IP networks with performance guarantees

Link capacity computation methods and apparatus for designing IP networks with performance guarantees

A method and apparatus for providing ABR and UBR services with one FIFO queue. The queue accepts UBR data until a threshold queue capacity (EPD) is reached, at which point data is dropped. This threshold is dynamically adjusted by adding a value proportional to the difference between the actual UBR bandwidth and the target UBR bandwidth. Applications sending data for ABR service are provided with a feedback which allows those applications to regulate the speed at which data is transmitted to the queue, this feedback is a function of some threshold value (AQT) which is also dynamically adjusted as described above. If the queue is being underutilized, an adjustment is made to both EPD and AQT.

Method and apparatus for dynamic EPD threshold for UBR control

A flow control method for available bit rate service in an asynchronous transfer mode network for detecting congestion in a switch and conveying congestion status information using resource management cells to the source which adjusts its flow rate accordingly. During detection of congestion in the switch the explicit rate field of the resource management cell is updated using a dynamic major reduction factor to improve transient queue-length performance.

Flow control method using a dynamic major reduction factor

Router placement methods and apparatus for designing IP networks with performance guarantees

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Clarksville, MD, United States of America

Lotfi Benmohamed