Alcatel Lucent

Other

Lucent Technologies Inc.

Alcatel-lucent USA Inc.

Vinay Purohit

Paul Albin Wilford

Hong Jiang

Yung-Terng Wang

Ramesh Nagarajan

Muhammad A Qureshi

Method and apparatus for aggregating spectrum in which multiple disjoint blocks of spectrum may be configured as one virtual contiguous block of spectrum by modulating onto each disjoint blocks of spectrum a respective portion of a data stream in which the data rate associated with the modulated portion is compatible with the available bandwidth of the disjoint spectrum block upon which is modulated.

Virtual aggregation of fragmented wireless spectrum

Systems, methods and apparatus for improving resiliency to interference as well as improved bandwidth utilization in data transmission systems by using spectral fragments to convey respective portions of a data stream or file to be transmitted and independently adapting spectral fragment channel forward error correction (FEC) rate or other parameters in response to interference/impairment conditions.

System and method providing resilient data transmission via spectral fragments

The present invention relates to a distributed storage scheme, wherein every file is optionally encrypted, optionally interleaved, fragmented, and the various fragments stored on different constituent storage systems commensurate with the storage mechanisms supported by those storage providers.

Distributed fragments file system

Systems, methods and apparatus for securely transmitting a data stream by dividing a data stream into a plurality of sub-streams; associating each substream with a respective spectral fragment; encrypting at least some of the sub-streams; and modulating each sub-stream to provide a respective modulated signal adapted for transmission via a respective spectral fragment.

A mechanism for resilient transmission of a data stream D by associating sequential data stream portions with respective elements within an array of elements, defining and FEC encoding each of a plurality of element groups comprising non-sequential data stream portions, dividing the sequence of FEC blocks into a plurality of substreams, and associating each substream with a respective transmission channel.

System and method for multi-channel FEC encoding and transmission of data

In one method, an uplink signal carrying at least one block of transmitted samples is transmitted, and a distorted copy of the uplink signal is received as a downlink signal. A plurality of blocks of received samples are generated based on the received downlink signal, and a time delay and frequency offset between the uplink and downlink signals are determined based on a correlation between the block of transmitted samples and at least one of the plurality of blocks of received samples.

Methods and apparatuses for estimating time delay and frequency offset in single frequency networks

In a packet-based data network, packets are duplicated and a sequence number is inserted into each duplicate packet, where the duplicate packets are transmitted along two different paths from a source node to a destination node in the network. Depending on the implementation, the source node inserts different types of sequence numbers into the duplicate packets, and the destination node processes those sequence numbers accordingly to determine whether to accept or reject each received packet. In certain implementations, the number of sequence bits allocated to each packet is smaller than the size of the effective sequence number for the packet as interpreted by the destination node.

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Branchburg, NJ, United States of America

Vinay Purohit