Nortel Networks Corporation

Bernard Thiboutot

Leo L Strawczynski

Delfin Y Montuno

James Aweya

Howard Martin Sandler

Genzao G Zhang

Tong Shan

Hugues Tournier

LeRoy Anthony Pick

Mieczyslaw Juliusz Surazski

Suet Yuen

Jinghui Li

Okan Azmak

Stephen Roberts

Joel Milgram

Pierre A Hamel

Imed Frigui

Jos&eacute; M Duran

A tuning system for use in a receiver of an optical transmission system. The receiver includes a data channel transporting a data signal and a monitoring channel transporting a copy of the data signal. The tuning system includes a processing module for processing the copy of the data signal to generate a control signal conveying tuning information. This tuning information is used by the receiver to alter an operating point of the receiver on the data channel. The operating point of the receiver that is susceptible to be altered by the control signal is a decision threshold applied on the data signal to discriminate one binary value from another binary value on the data channel of the receiver. This approach allows, when required or desired, tuning of the system while the system is in service. This is possible since the tuning of the system is performed using the monitoring channel, and does not disturb nor corrupt the actual data being transported on the data channel.

Method and apparatus for in-service optimization of the performance of an optical transmission system

A method of allocating bandwidth for transmitting upstream cells from a CPE unit to a BTS. The CPE determines arrival time information associated with each cell and sends arrival time information associated with at least one cell to the BTS. The BTS allocates future bandwidth to the CPE as a function of the arrival time information received from the CPE. For example, the BTS estimates the number of cell arrivals occurring in the current scheduling period based on past cell arrival times. The BTS then sends information to the CPE in which the allocated future bandwidth is specified. Finally, the CPE groups a number of cells into a burst packet occupying the allocated bandwidth and sends the burst packet to the BTS. Rather than respond in a delayed manner to a bandwidth deficiency or surplus at an individual CPE unit, the BTS produces an estimate of a CPE unit's bandwidth demands, resulting in more efficient bandwidth utilization and reduced cell loss ratio.

Scheduling of upstream traffic in a TDMA wireless communications system

An apparatus for transmitting software to a subscriber device in a communication network, which includes a processor, a database coupled to the processor, and a communication device for providing software to a subscriber device. The database contains information about subscribers of a communication network. A method for transmitting software to subscriber devices in a communication network, comprising identifying a subscriber device which requires a software update, transmitting a first signal from a processor to the subscriber device, initiating a communication channel between the subscriber device and the processor, and transmitting a second signal to the subscriber device. The second signal contains software.

Apparatus and methods for providing software updates to devices in a communication network

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Hull, Canada

Bernard Thiboutot