Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

David Mottier

Loic Brunel

Damien Castelain

Nicolas Gresset

Cristina Ciochina

Herve Bonneville

Alain Mourad

Yoshitaka Hara

Mourad Khanfouci

Noriyuki Fukui

Arnaud Gueguen

Nicolas Voyer

Nadine Chapalain

Thomas Salzer

Hervé Bonneville

Loïc Brunel

Thomas Saelzer

A method for deciding if a telecommunication device has to be switched in an operating mode which is different from the operating mode in which the telecommunication is operating. In an operating mode, the telecommunication device relays signals transferred between a terminal and an access node which handles the terminal. In another operating mode, the telecommunication device handles the terminal. The method includes: determining, from obtained information, if a predetermined event occurs, and if the predetermined event occurs, deciding that a handover of the terminal has to be conducted between the access node and the telecommunication device, and deciding that the telecommunication device has to switch in an operating mode which is different from the operating mode in which the telecommunication is operating.

Method and a device for deciding if the operating mode of a telecommunication device has to be switched in a different operating mode

A method for determining a shifting parameter P to be used by a telecommunication device for mapping symbols on sub-carriers, the telecommunication device including at least two transmit antennas, the symbols being transferred through each antenna of the telecommunication device on at least an even number K, strictly greater than two, of sub-carriers allocated to the telecommunication device. The telecommunication device transfers on a first antenna on each sub-carrier 'k', a signal representing a symbol 'X' in the frequency domain. The telecommunication device transfers on a second antenna on each sub-carrier &#x2018;k&#x2019;, a signal representing a symbol &#x2018;X'&#x2019; derived from the signal transferred on the first transmit antenna, for each frequency k, by the formula X&#x2032;=&#x3b5;(&#x2212;1)X*. Sub-carriers grouped in at least two clusters are allocated to the telecommunication device, and the shifting parameter p is even and determined according to clusters of sub-carriers allocated to the telecommunication device.

Method and a device for determining a shifting parameter to be used by a telecommunication device for transferring symbols

The present invention concerns a method, a device and a system for scheduling transfer of data from a mobile terminal to a base station in a telecommunication system. The method is executed by the mobile terminal. It comprises the steps of determining whether a resource of the telecommunication system needs to be allocated to the mobile terminal to enable transferring data from the mobile terminal to the base station, and transferring, from the mobile terminal to the base station, a pilot symbol before data transmission and before the resource of the telecommunication system is allocated to the mobile terminal, when the resource of the telecommunication system needs to be allocated to the mobile terminal, the pilot symbol having information for allocation of the resource of the telecommunication system by the base station.

Method, device and system for scheduling transfer of data from a mobile terminal to a base station

The present invention concerns a method for adjusting the transmission power of signals transferred by or to a first base station, the first base station being located in the cell of a second base station, the first base station:

Method and a device for adjusting the transmission power of signals

A method and device for setting or maintaining a preferential condition for a mobile terminal. The method includes determining if the base station associated with the mobile terminal is involved in an inter cell interference coordination procedure, setting the preferential condition for the mobile terminal when the mobile terminal is in a communication through a base station not associated with the mobile terminal, if the base station associated with the mobile terminal is involved in an ICIC procedure, and not setting the preferential condition for the mobile terminal when the mobile terminal is in a communication with the remote telecommunication device through a base station not associated with the mobile terminal if the base station associated with the mobile terminal is not involved in an ICIC procedure.

Method for setting or maintaining a preferential condition for a mobile terminal

The present invention concerns a method for transferring information enabling the adjustment of the transmission power of the signals transferred and/or received by a first base station through a wireless interface, a cell of the first base station being at least partly comprised in a cell of a second base station. A mobile terminal for which a handover has been or has to be conducted between the first and second base stations obtains information related to the path between the second base station and the mobile terminal and transfers information to the first base station.

The present invention concerns a method, a device, a mobile terminal and a base station for transferring data from a mobile terminal to a base station after a wireless resource enabling the transfer of the data from the mobile terminal to the base station has been allocated. The method comprises the steps, executed by the mobile terminal, of transferring, information indicating whether or not an allocated wireless resource is needed for the transfer of the data from the mobile terminal to the base station, the information indicating that no allocated wireless resource is needed for the transfer of the data from the mobile terminal to the base station being transferred by setting the power of pilot symbols to a null value, receiving, from the base station, allocation information indicating that the wireless resource is allocated to the mobile terminal when the information indicates that the allocated wireless resource is needed, and transferring the data to the base station in the wireless resource indicated as allocated to the mobile terminal.

Method and device for transferring data, mobile terminal and base station

Method for transmitting through a bidirectional communication channel at least one conventional frame (CVFR) split into time slots SLI (for j=1 to L) separated from each other by guard intervals G, each time slot SLI being allocated either to a first or to a second direction of communication uplink (UL) or downlink (DL) offered by the bidirectional communication channel. The method according to the invention includes: detecting at least two successive time slots SLj, SLm+1, SLj+2 allocated to a same direction of communication DL, and inserting data in the guard interval separating such successive time slots SLj, SLj+1, SLj+2.

Method for transmitting TDD frames with increased data payload

A method for determining shifting parameters pand pto be used by a first and a second telecommunication devices for mapping symbols on sub-carriers. The method comprises the steps of:

Method and a device for determining shifting parameters to be used by at least a first and a second telecommunication devices

The present invention relates to a method for transmitting data Di in a telecommunication system SYST including a first transceiver TXi and a second transceiver RX linked together by means of a communication channel Chi, one of which transceivers being mobile, which method includes: According to the invention, the equalization values Wi(j)* are also representative of a Doppler effect generated by movement of the mobile transceiver. The invention enables to significantly compensate for alterations caused to the communication channel Chi by movement of the mobile transceiver.

Method for efficient equalization in a telecommunication system including at least one mobile transceiver

A transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals over bidirectional communication channels, wherein one or more supplementary symbols that are formed of a set of pilot sequence elements are transmitted between the base station and the terminal during a time delay. The method includes the steps of: obtaining the multiplexing resources of the wireless telecommunication system, assigning to at least one obtained multiplexing resource, pilot sequence elements, and transferring at least one supplementary symbol that includes pilot sequence elements.

Transmission method in a wireless telecommunication system including at least a base station intended to communicate with terminals

A SC-QOSTFBC (Single Carrier-Quasi Orthogonal Space Time Frequency Block Code) for 4 transmit antennas in the domain of wireless communication, and coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. These codes are based on sending on a first antenna a constellation corresponding to what would be sent in a mono antenna scheme, and sending equivalent constellations on the other antennas. The codes are designed to keep a low-PAPR property at each transmit antenna when associated with DFT spread OFDM.

SC-QOSTFBC codes for MIMO transmitters

Coding and decoding schemes useful in the context of MIMO (Multiple Input Multiple Output) or MISO (Multiple Input Single Output) communications especially used in conjunction of OFDM-like transmission schemes. A space frequency block code (SFBC) is based on the simultaneous use of two variants of Alamouti codes in the frequency domain, each kind of Alamouti code being applied to well-chosen pair of frequencies. The proposed SFBC keeps the constant envelope property for each antenna while leading to performance equal or very close to the pure Alamouti STBC performance.

Method of ratio data emission, emitter and receiver using the method

A method for determining at least one terminal for which signals transferred between the at least one terminal and a base station of a wireless cellular telecommunication network have to be relayed by a relay, the base station allocating resources of the wireless cellular telecommunication network. The method includes, executed by a management entity: receiving from the base station, information indicating to which terminal or terminals at least a part of the resources are allocated; receiving from the relay, a list of indicators of resources, and determining the at least one terminal for which signals transferred between the at least one terminal and the base station have to be relayed by the relay according to the information indicating to which terminal or terminals at least a part of the resources are allocated and to the list of indicators of resources.

Method and a device for determining at least one terminal for which signals transferred between the at least one terminal and a base station of a wireless cellular telecommunication network have to be relayed by a relay

A method for determining if a handover of a half-duplex terminal has to be executed from a first base station to a second base station, the half-duplex terminal not transferring and not receiving signals during a period of time, called an idle period. The first base station transfers to the half-duplex terminal a downlink signal in the cell of the first base station. The first base station receives a message in response to the downlink signal including information relative to quality measurements on the downlink signal transferred by the first and the second base stations. The first base station determines the round trip delay between the half-duplex terminal and the second base station. The first base station further transmits a handover notification message to the half-duplex terminal instructing the half-duplex terminal to execute a handover procedure from the first base station to the second base station.

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Rennes Cedex, France

David Mottier