Abstract:
The invention relates to an access point (20) which sends geographical positioning information from the access point to mobile terminals (10) and to a mobile terminal which receives this information and estimates the position thereof based on said information. Geographical-locating architecture for WiFi 802.11 mobile terminals on ADSL access points generally consists of including geographical positioning information, i.e., the geographical coordinates of the access point during the registration phase thereof. The access point includes this geographical information in the information posted so that the mobile terminals can be connected to same. The mobile terminals can thus know the geographical location where they are located with an approximation that will depend directly on the number of access points that the mobile terminal can detect.
Abstract:
Method for downloading segments of a video file in a peer to peer network which comprises requesting to create new neighbourhood lists according to a health parameter which indicates availability of video segments among neighbors. Scheduling methods for the upload and download schedulers which work in synergy with the aforementioned features are also disclosed.
Abstract:
Method and system of classification of audiovisual information from a data stream by means of audio stream comparison. After detecting segments of the data stream containing advertisements, the segments are compared to a plurality of audio files stored in a database to cluster the detected advertisements. If the segment is not detected in the database it is included as a new audio file with its information in the database.
Abstract:
A method to generate a wireless waveform for use in a wireless communication system, a wireless communication system and computer program product thereofThe method comprises the generation of a waveform for application in the wireless communication system characterized by significant phase noise, Doppler spread, multipath, frequency instability, and/or low power efficiency by at the transmitter side: creating a discrete-time instantaneous frequency signal {tilde over (f)}[n]; appending a cyclic prefix with length LCP to the beginning of the discrete-time instantaneous frequency signal {tilde over (f)}[n]; constructing a discrete-time unwrapped instantaneous phase φ[n]; constructing a discrete-time complex baseband signal, and appending at the beginning a Constant Amplitude Zero Autocorrelation, CAZAC, signal of length LCP for multipath detection; and passing the constructed discrete-time complex baseband signal through a digital-to-analog, DAC, converter to yield the continuous-time radio frequency signal s(t) after conversion to the carrier frequency.
Abstract:
A distributed health-check method for web caching in a telecommunication network, wherein a plurality of web caching nodes are coordinated to monitor a set of origin servers where web content is generated. The method includes associating to each user of the telecommunication network requesting the web content buckets as logical containers for holding the web content requested; generating a list of users of the telecommunication network requesting the web content; and performing the plurality of web caching nodes a number of health-checks to the set of origin servers to download the requested web content. A filtering of the set of origin servers is performed for grouping in different areas of interest and the number of health-checks are performed by a limited number of caching nodes receiving the web content requests. The limited number of caching nodes selected belonging to a specific area of interest of the set of origin servers monitoring them.
Abstract:
A method involving coordinating resources between a victim and an aggressor base station in massive MIMO systems, whereby only those specific beams involved in the interference scenario are coordinated in time and/or frequency domains without affecting other resources committed to other users as well as legacy users. Also disclosed is a system and computer program configured to implement the method.
Abstract:
The method comprises a LTE cellular base station reporting radio resources usage information about its resource assignment in a current LTE frame emitted or to be emitted thereby, regarding slot usage for at least the slots of the downlink subframes of the current LTE frame, and generally also regarding the slots of subsequent downlink subframes and of also regarding uplink subframes. The uses of the method are for interference reduction and for energy optimization.
Abstract:
The method comprising at least one user device provided with at least four antennas, wirelessly connected to a serving base station having between one and four transmit antennas and suffering interferences from at least one interfering base station having between one and four transmit antennas, establishing a data transmission link among a plurality of antennas, and: applying a time shift delay between said serving base station and said at least one interfering base station in order to avoid collision between Cell Reference Signals (CRS) of serving and interfering base stations when said data transmission is established; and introducing changes on the physical layer for PDSCH transmission and reception aimed at achieving inter-layer interference cancellation, said changes introduced comprising the introduction of a pattern of transmission gaps at symbols (l) and subcarrier indices (k) of interfering cell's CRS signals, which will be exploited by said at least one user device for effective interference cancellation.