Interdigital Ce Patent Holdings

Interdigital Ce Patent Holdings, Sas

Interdigital Madison Patent Holdings, Sas

Centre National De La Recherche Scientifique

Hermes Sellier

Université De Rouen Normandie

Institut National Des Sciences Appliquees De Rouen

Loic Fontaine

Anthony Pesin

Cyril Quinquis

Henk Heijnen

Max Ward Muterspaugh

John Sidney Stewart

Celine Guede

Joan Llach Pinsach

Thomas Lecourt

Stéphane Marcotte

Alexandra Le Foll

In a context of virtualized access points deployment, an access point of a first wireless network is split in a radio equipment deployed at the user premises and a radio equipment controller deployed in a data centre located a few kilometres from the user premises, the radio equipment and the radio equipment controller being interconnected via a wired network connection. In order to establish a secure wireless connection of a device to the virtualized access point in a user-friendly manner, a salient idea is to receive at the radio equipment controller in the data centre a first and a second information items respectively emulating a first action of a user on the first device and a second action of the user on the virtualized access point. The disclosed principles are advantageous as sending the first and the second information items to the radio equipment controller allows to emulate user actions on both the wireless device seeking for joining the first wireless network and the virtualized access point, further allowing to use simple but secure wireless configuration setup protocols, avoiding laborious configurations from users.

Method and device for establishing a secure wireless connection

A method for processing a stream of data represented by a plurality of symbols associated with a constellation. The method includes applying a symbol constellation extension projection to at least one of the plurality of symbols, the symbol constellation extension projection having an outward angular region, the outward angular region defined by a value of an angle, and the value of the angle equal to or less than an angular distance between two symbols in the constellation. The value of the angle is based on a constellation and a code rate used for encoding and transmitting the stream of data.

Apparatus and method for reducing peak to average power ratio in a signal

In a staggercasting system, a receiver estimates a delivery time of a packet from a main stream and, if the packet from the main stream is not received at the estimated delivery time, the receiver substitutes a corresponding packet from the stagger stream. As a result, a loss can be detected quicker since the receiver does not have to wait until detection of a missing sequence number and, therefore, the receiver can accommodate the time of presentation such that the user does not suffer a loss in quality of service.

Method and apparatus for detecting packet loss in staggercasting

Methods and apparatuses for processing a signal that is transmitted with a reduced peak to average power ratio are described. The processing includes applying () a symbol constellation extension projection to at least one symbol in the constellation, the symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region, the value for the angle determined by a selection of the constellation used as part of the transmitted signal and a code rate used for encoding the stream of data.

A method and apparatus for receiving a reduced peak to average power ratio signal is disclosed. The method includes receiving a signal, the signal being processed prior to transmission to reduce peak to average power ratio, determining a processing mode used to reduce the peak to average power ratio of the received signal, and reducing the amplitude level for a portion of the received signal using constant modulus clipping if the processing mode includes a two-dimensional constellation extension. The apparatus includes a processing circuit that receives a signal, the signal being processed prior to transmission to reduce peak to average power ratio, and a limiter circuit that determines a processing mode used to reduce the peak to average power ratio of the received signal and reduces the amplitude level for a portion of the received signal using constant modulus clipping if the processing mode includes a two-dimensional constellation extension.

Method and apparatus for receiving a reduced peak to average power ratio signal

Methods and apparatuses for processing a signal that is transmitted with a reduced peak to average power ratio are described. The processing includes applying () a first type of symbol constellation extension projection to at least one symbol in the constellation if it is determined that a type of constellation is a non-square constellation, the first type of symbol constellation extension projection having an outward angular region from an original position for the at least one symbol in the constellation, the outward angular region defined by a value for an angle between a first boundary and a second boundary for the outward angular region.

A broadcast TV signal is a DVB-T2 based system. A DVB-T2 transmitter checks OFDM symbols before transmission to determine a level of adjacent channel interference (ACI). If the of level of ACI is too high, i.e., above a threshold value, the OFDM symbols are filtered before transmission. Otherwise, the OFDM symbols are transmitted without filtering. A filtering field is added to an LI pre-signaling table of the broadcast DVB-T2 signal to signal a DVB-T2 receiver when the received OFDM symbols have been filtered.

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Loic Fontaine