Abstract:
The present invention relates to a transmitting terminal for transmitting data to a receiving terminal over a direct link connection. The transmitting terminal comprises a receiving unit that receives from the base station a timing command for adjusting an uplink transmission timing value for data transmissions to the base station. A generating unit generates direct link timing information, based on the uplink transmission timing value, the direct link timing information being usable for generating a direct link transmission timing value for determining the timing of the data transmission over the direct link. A transmitting unit transmits to the receiving terminal the generated direct link timing information, the direct link timing information being usable at the receiving terminal for generating a direct link reception timing value for determining the reception timing of data to be received on the direct link from the transmitting terminal.
Abstract:
Provided are D2D wireless communication methods and UEs therefor. In one embodiment, the D2D wireless communication method performed by a UE includes continuing D2D transmission by using a resource from a resource pool allocated for mode 2 operation when switching from mode 1 operation to mode 2 operation. In another embodiment, the D2D wireless communication method performed by a UE includes performing D2D transmission by using a resource from a resource pool allocated for mode 2 operation, wherein the resource pool is indicated by a dedicated RRC signaling transmitted by an eNB, a SIB transmitted by an eNB, a PD2DSCH transmitted by other UE(s), and/or pre-configuration, and the dedicated RRC signaling, the SIB, the PD2DSCH and the pre-configuration are in descending order in priority when determining the resource pool.
Abstract:
The invention relates to a method for allocating radio resources to a transmitting terminal for performing direct communication transmission over a direct link connection. The transmitting terminal receives a system information broadcast from the base station, which comprises information on a temporary transmission radio resource pool, indicating radio resources for performing a direct communication transmission, and comprises configuration information on the resource pool to limit the amount of time that the temporary radio resource pool is usable by the transmitting terminal.
Abstract:
The present invention relates to selection of a synchronization source among various synchronization sources which include sources determining the synchronization signal from the network such as base stations (network nodes) or user equipments which receive the synchronization signal possibly over other hops from the base station, and which further includes sources which do not determine their synchronization signal from the network. The selection of the synchronization source is performed by choosing the source with the most reliable synchronization signal based on a metric calculated for each of the sources considered. In particular, the metric is based on the type of the source, number of hops between the network and the source and/or received signal quality. After selecting the source, the timing of the device is adapted accordingly.
Abstract:
The invention relates to a method for transmitting a periodic channel quality report (CSI) and/or a sounding reference symbol (SRS) from a UE to an eNodeB. To avoid double decoding at the eNodeB in transient phases, a deterministic behavior of the UE is defined by the invention, according to which the eNodeB can unambiguously determine whether the UE will transmit the CSI/SRS or not. According to one embodiment, the UL grants and/or DL assignments received until and including subframe N-4 only are considered; UL grants and/or DL assignments received by the UE after subframe N-4 are discarded for the determination. Additionally, DRX-related timers at subframe N-4 are considered for the determination. In a second embodiment, DRX MAC control elements from the eNodeB, instructing the UE to enter DRX, i.e. become Non-Active, are only considered for the determination if they are received before subframe N-4, i.e. until and including subframe N-(4+k).
Abstract:
La presente invención se refiere a una terminal de transmisión para transmitir datos a una terminal de recepción a través de una conexión de enlace directo. La terminal de transmisión comprende una unidad de recepción que recibe desde la estación base un comando de tiempo para el ajuste de un valor de tiempo de transmisión de enlace ascendente para transmitir datos a la estación base. Una unidad de generación genera información de tiempo de enlace directo, con base en el valor de tiempo de transmisión de enlace ascendente, la información de tiempo de enlace directo siendo útil para generar un valor de tiempo de transmisión de enlace directo para determinar el tiempo de transmisión de datos por el enlace directo. Una unidad de transmisión transmite a la terminal de recepción la información de tiempo de enlace directo generada, la información de tiempo de enlace directo siendo útil en la terminal de recepción para generar un valor de tiempo de recepción de enlace directo para determinar el tiempo de recepción de datos que serán recibidos en el enlace directo desde la terminal de transmisión.
Abstract:
Un circuito integrado que, cuando opera dentro de una estación móvil, se adapta para controlar dicha estación móvil para realizar un procedimiento para transmitir una notificación de información de calidad de canal y / o un símbolo de referencia de sondeo desde dicha estación móvil a una estación base en un sistema de comunicación móvil en la subtrama N, en el que la subtrama N está configurada para la estación móvil para la transmisión de notificaciones de información de calidad de canal periódicas y / o símbolos de referencia de sondeo periódicos, comprendiendo el procedimiento las etapas de: determinar si la estación móvil se encontrará en el Tiempo Activo de DRX o en el Tiempo No Activo de DRX en la subtrama N, al menos en base a los elementos de control de MAC, en relación con la operación de DRX, y que son recibidos por la estación móvil hasta e incluyendo la subtrama N - (4 + k), en la que k es un valor entero de 1 a K, transmitir la notificación de información de calidad de canal y / o el símbolo de referencia de sondeo a la estación base en la subtrama N, en el caso de que se determine que la estación móvil se encuentra en el Tiempo Activo de DRX en la subtrama N.