Sony Corporation

Other

University of Surrey

Muhammad Ali Imran

Hideji Wakabayashi

Jussi Tapani Kahtava

Atta Ul Quddus

Ayesha Ijaz

Lei Zhang

Yinan Qi

Diana Dawoud

Fabien Heliot

A method of transmitting data via a unipolar signal comprises allocating a symbol to one or more signals among a plurality of signals, applying pulse shaping to the plurality of signals to obtain a plurality of filtered signals, wherein the filtered signals are orthogonal signals, and transmitting the sum of the filtered signals as a unipolar signal, wherein the transmitted signal is a weighted sum of the filtered signals. The data can be recovered at the receiver by applying a plurality of orthogonal matched filters to the received unipolar signal to obtain a plurality of filtered signals, and performing symbol detection on the plurality of filtered signals to determine the received symbol. Apparatus for transmitting and receiving unipolar signals are also disclosed.

Transmitting and receiving symbols via unipolar signals

A communications device including a transmitter and a receiver configured to transmit and receive signals representing data to and from an infrastructure equipment of a mobile communications network via a first wireless access interface. The communications device transmits signals via a second wireless access interface to a communications apparatus operating as a relay node, and determines an additional delay caused by the transmission of the signals to the communications apparatus acting as the relay node via the second wireless access interface compared with a time taken which would have been taken to transmit the signals to the infrastructure equipment as if transmitted via the first wireless access interface, and transmits an indication from which the infrastructure equipment can derive the determined additional delay for adjusting the transmission or reception of the synchronized response.

Communications device, communications apparatus operating as a relay node, infrastructure equipment and methods

A method of operating a terminal device in a wireless telecommunications system which, during a mode transition state, supports a first mode of operation in which the terminal device does not communicate with the wireless telecommunications system and a second mode of operation in which the terminal device does communicate with the wireless telecommunications system, the method including: transitioning from the first mode of operation to the second mode of operation at the expiration of a time period whereby the time period is defined by the data traffic pattern to the terminal device.

Terminal device, base station, wireless telecommunications system and methods for transitioning between two modes of operation

A controller configured in combination with a transmitter and a receiver to transmit signals via a second wireless access interface to a communications apparatus operating as a relay node, the signals for transmission to infrastructure equipment by the communications apparatus as if the signals were transmitted by the communications device via a first wireless communications interface, to receive signals from the infrastructure via the first wireless access interface, to determine an additional delay caused by transmission of the signals to the communications apparatus acting as the relay node via the second wireless access interface compared with a time taken which would have been taken to transmit the signals to the infrastructure equipment as if transmitted via the first wireless access interface, and to transmit to the infrastructure equipment an indication from which the infrastructure equipment can derive the determined additional delay for adjusting transmission or reception of the synchronized response.

A communications device includes a transmitter to transmit signals representing data to an infrastructure equipment of a mobile communications network via a first wireless access interface and to transmit signals via a second wireless access interface to one or more communications apparatus which can act as relay nodes, a receiver to receive signals from the infrastructure equipment via the first wireless access interface and to receive signals via the second wireless access interface from the one or more communications apparatus which can act as relay nodes, and a controller. The controller can form a relay assist request message and with the transmitter and receiver to transmit the relay assist request message on the second wireless access interface for reception by the one or more communications apparatus which can act as relay nodes to assist in communicating signals representing data to the infrastructure equipment via the first wireless access interface.

An infrastructure equipment as part of a mobile communications network receives an indication that data is to be transmitted to one of communications devices. In response the infrastructure equipment transmits a first paging message to the communications device to indicate the communications device is to receive the data via a wireless access interface. If a response to the transmitted first paging message is not received within a predetermined time, then if the infrastructure equipment can use a power boosting mode, to transmit the first paging message with a boosted power, or if the infrastructure equipment cannot use a power boosted mode for transmitting, to transmit a second paging message to one or more communications apparatus which can operate as a relay node for the communications device. The second paging message identifies the relay node and the communications device for which the infrastructure equipment is to transmit the data.

Infrastructure equipment and methods

A method of operating a relay device to receive data from one or more terminal devices and relay the data to a base station in a wireless telecommunications system. The method includes receiving plural blocks of data from one or more terminal devices at different times. Each block of data is received in association with an indication of a time by which the block of data should be transmitted to the base station. The block of data are buffered at the relay node that determines earliest time by which one of the received blocks of data should be transmitted to the base station and transmits the plurality of blocks of data to the base station together in advance of this earliest time. The method reduces signalling overhead associated with transmissions from the relay device to the base station while helping to ensure data is not delayed at the relay node for longer than is acceptable for the data.

Growing community of inventors

Weybridge, United Kingdom

Muhammad Ali Imran