Thomson Licensing

Interdigital Ce Patent Holdings

Interdigital Ce Patent Holdings, Sas

Thomson Licensing Dtv

Henrik Lundgren

Theodoros Salonidis

Ioannis Pefkianakis

Christophe Diot

Don Towsley

Jaideep Chandrashekar

Anand Prabhu Subramanian

Tae Hyun Kim

Nidhi Hegde

Pascal Le Guyadec

François Baccelli

Marianna Carrera

Vivek Mhatre

Dimitrios Koutsonikolas

Rafael Laufer

Julien Herzen

An Chan

Theodoros Salondis

Anand Subramanian

The present invention generally relates to a management of a wireless interface of a device; the management comprises: monitoring of at least one component of the device, other than a wireless network element; switch a power state of the wireless interface to another power state according to the monitored activity.

Method of management of a wireless interface of a device and corresponding wireless device

The present invention generally relates to a management of a wireless interface of a device. The management of the wireless interface includes monitoring of at least one component of the device, other than a wireless network element followed by switching a power state of the wireless interface to another power state according to the monitored activity.

Method of spectrum allocation in a wireless network, comprising the steps, performed by a first access point connected to said wireless network and operating at a first spectrum configuration, chosen from a finite set of spectrum configurations, each spectrum configuration in the set comprising a channel center frequency, a channel width and a transmit power, of:

Spectrum allocation in a wireless network

A method of selecting antenna segments for transmission and/or reception in a MIMO wireless transmission system using sectorized directional antennas, includes the steps of selecting, from an initial set of ranked link antenna patterns, a link antenna pattern having the best average rank, at predetermined time intervals, successively selecting a subset of link antenna patterns having average ranks within a predetermined distance to the best average rank, determining an average link performance of the link antenna patterns selected in the preceding step, determining an average rank of the link antenna patterns, for which the average link performance has been determined in the preceding step, selecting the link antenna pattern having the best average rank, and repeating the process at the next predetermined time interval.

Method of, and apparatus for, controlling a wireless connection in a MIMO system using multi-sector directional antennas

A processing device equips a controller that is intended for providing data transmission schedules into multi-slot frames, based on a conflict graph representative of wireless links between nodes that interfere when transmitting simultaneously on a same radio channel, for nodes linked therebetween and belonging to a multi-hop wireless network using a MAC protocol supporting a slotted access. This processing device comprises a processing means arranged, during each frame, for updating the conflict graph from interference information provided by the nodes during this frame, and for refining this conflict graph from detection of hidden interferer nodes based on detected failures of data transmissions of the links between these nodes during at least the previous frame.

Method and processing device for optimal interference estimation and scheduling in a multi-hop wireless network with centralized control

The invention concerns a method for optimizing antenna pattern assignment for a first wireless communication device forming a wireless network with at least one second wireless communication device, each of said communication device being equipped with a multi-sector antenna, an antenna pattern being a combination of said antenna sectors, said communication devices being adapted for sending a request and for receiving a response using a current antenna pattern assignment, said method comprising a step of:

Method for topology control using sectorized antennas in wireless networks

The invention concerns a method for measuring channel state information of multiple transmission/reception modes in a wireless network comprising a plurality of nodes, said modes being defined by frequency channels and/or antenna patterns, said wireless network comprising a MAC (Media Access Control) layer and every node comprising at least one MAC queue, comprising the steps of:periodically sending broadcast probe packets by at least one node called transmitter node, using a pre-determined and globally known period and predetermined sequence of transmission modes, each of said probe packets containing the transmission mode used for its transmission a sequence number of the transmission mode in the pre-determined sequence of transmission modes and a timestamp value containing the time said broadcast probe packet was buffered at the MAC queue of the transmitter node; measuring, by at least one second node called receiving node receiving a broadcast probe packet , channel state information of a transmission/reception mode for the link between the transmitter node and the receiving node; storing, by said receiving node, said measured transmission/reception mode for said link; using information contained in said received broadcast probe packet, by said receiving node to determine its reception mode and the beginning and end time instants it will use this reception mode, in order to receive a further broadcast probe packet and measure the next transmission mode of transmitter node, during a next measurement period of transmitter node.

Method for channel state measurement in multi-mode multi-hop wireless networks

The present invention relates to a method for measuring link cost metrics and evaluating their accuracy with respect to reference measure of link quality in a communication network, said method comprising the steps of: during a given time interval, simultaneously transmitting several types of probe packets and data traffic, and estimating a plurality of link cost metrics (metricA, metricB, . . . , metricN) and a reference measure of link quality for a set of communication links; evaluating the accuracy of the estimated link cost metrics (metricA, metricB, . . . , metricN) by computing their correlation with the reference measure of link quality; and collecting cross-layer information for each probe packet.

Method for evaluating link cost metrics in communication networks

The invention concerns a method for synchronizing clocks of a set of nodes in a TDMA ('Time Division Multiple Access') communication network comprising a plurality of nodes, among which some called time reference (TR) nodes are synchronized to a common time reference through a predetermined out-of-band synchronization mechanism, other nodes being called non-TR nodes, each node comprising an internal clock, characterized in that it comprises the steps of: The invention also concerns a communication device in a TDMA communication network.

Method and device for time synchronization in a TDMA multi-hop wireless network

The invention concerns a method of configuring the topology of a communication network comprising a plurality of nodes (i,j, . . . , N), the communication network being organized as a forest structure comprising trees and subtrees, wherein at least one node i maintains a periodic timer and an expiration of the timer of the node i triggers the steps of: searching, by the node i, a parent node; selecting, by the node i, a parent node using at least throughput and subtree size as selection criteria; and migrating the node i to the selected size as selection criteria; and migrating the node i to the selected parent node along with its subtree size. Preferably, the step of selecting a parent node by the node i comprises a sub-step of executing a function having as parameters respective subtree sizes of a node j before and after the migration of the node i to another node k.

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Henrik Lundgren