Abstract:
Systems and methods for transmitting uplink control signals in a cellular communications network are disclosed. In one embodiment, a wireless device configured to operate in a cellular communications network includes a radio subsystem and a processing subsystem. The processing subsystem selects a value for at least one parameter for an uplink control channel format based on content to be transmitted in an uplink control channel transmission according to the uplink control channel format. The processing subsystem then transmits, via the radio subsystem, the content in an uplink control channel transmission according to the uplink control channel format and the value for the at least one parameter for the uplink control channel format selected based on the content.
Abstract:
A method of operating a wireless communication terminal includes receiving one or more downlink control messages that each contain scheduling information scheduling the wireless termina! to receive a downlink transmission on either a primary carrier or a secondary carrier. The method also includes determining, for each of the downlink control messages, whether that message includes scheduling information for the primary carrier or for a secondary carrier. Additionally, the method includes selecting a format for an uplink control message based on whether any of the downlink control messages includes scheduling information for a secondary carrier, generating an uplink control message based on the selected, format, and transmitting the uplink control message to the base station.
Abstract:
In a communication system using HARQ1 the problem of false ACK detection when no ACK/NACK feedback is transmitted is solved sent by varying the reliability of the scheduling information transmitted to the user terminal on a downlink control channel depending on whether the user terminal is expected to use a first or second uplink channel for sending ACK/NACK feedback. When the user terminal is expected to use the first channel to send ACK/NACK feedback, the base station transmits scheduling information to the user terminal with normal reliability. When the user terminal is expected to send ACK/NACK feedback on the second uplink channel, the base station transmits the signaling information to the user terminal with enhanced reliability. The reliability of the signaling information can be increased, for example, by increasing the transmit power on the downlink control channel, increasing the aggregation level, or a combination thereof.
Abstract:
A timing offset value between at least one macro node and a common global navigation satellite system, GNSS, derived reference time is measured. The timing offset value is transmitted to at least a cell node that does not have a GNSS reference for transmission timing adjusting at the cell node. In some embodiments, where no small cell in a cluster has a GNSS reference time, a timing of a macro base station is used as a reference for synchronizing small cells in the cluster.
Abstract:
User Equipment (700) reports single-cell or multi-cell channel state information to a base station (600) on a PUCCH Format 3 resource. The PF 3 resource selected depends on whether ACK/NACK needs to be reported simultaneously. Different coding and/or scrambling and/or Interleaving schemes are used depending on whether ACK/NACK bits are present, as well as the number of ACK/NACK and/or CSI bits. Resource compatibility is maintained independently of the details of coding, interleaving, or scrambling - that is, all formats can be orthogonally multiplexed onto the same time-frequency resources. The format used for CSI only is PUCCH Format 3c (PF 3c) whereas the PUCCH Format used for CSI and ACK/NACK is PUCCH Format 3b (PF 3b). PUCCH Formats 3b and 3c may be further differentiated depending on whether a CSI from a single or multiple cells are reported, or from which cells (PCell, SCeil) an ACK/NACK is reported. Ambiguity may be resolved by using different spreading codes for reference signals In PF 3b and 3c formats.
Abstract:
A terminal (e.g., mobile communication device, UE) and a method are desert bed herein for allocating a soft buffer after interacting with a network node (e.g., base station, eNB). In addition, a network' node (e.g., base station, eNB) and a method are described herein that facilitates robust operations during a reconfiguration period while a terminal allocates a soft buffer located therein.
Abstract:
The auto-correlation properties of a reference signal or pilot pattern, such as a position reference signal (PRS) in a Long Term Evolution communication system, is improved by modifying the currently specified PRS patterns, and/or by PRS pattern shaping. Pattern shaping can result in creation of virtual PRS patterns, for example, by 5 controlling the PRS transmitted or received power used by the correlator. PRS power shaping can be implemented differently according to the location where the PRS power is calculated, e.g., in a network node or in a user equipment.
Abstract:
The present invention relates to methods and arrangements for assisting a User Equipment (UE) to determine transmit power to be used on a first uplink component carrier y, wherein the base station is configured to communicate with the UE over a plurality of uplink and downlink component carriers x,y. The UE is aware of path loss parameters associated with a second downlink component carrier x. The method in a base station comprises determining cell specific path loss parameters associated with the component carriers of the base station. The cell specific path loss parameters at least comprises path loss parameters associated with the first uplink component carrier y and a second uplink component carrier x which is paired to the second downlink component carrier x, wherein the second uplink component carrier and second downlink component carrier are within one frequency band. The method comprises the further steps of calculating a pathloss offset, deltaPL(y,x), for the first uplink component carrier y, wherein the pathloss offset deltaPL(y,x) is the pathloss power offset for the first uplink component carrier y with respect to the second uplink component carrier x, and sending the calculated pathloss offset, deltaPL(y,x) to the UE.
Abstract:
métodos e arranjos para transmitir e receber informação de controle de downlink para comunicação móvel sem fio. algumas modalidades fornecem um método para transmitir um canal de controle de downlink em pelo menos um bloco de recursos. o canal de controle de downlink compreende um conjunto de grupos de elementos de recurso. o método pode ser executado por um nó de transmissão, por exemplo, um enb. o nó de transmissão determina primeiro se deve transmitir o canal de controle de downlink usando transmissão localizada ou distribuída. em resposta à determinação de usar a transmissão localizada, o nó de transmissão executa a transmissão de tal forma que todos os grupos de elementos de recurso no conjunto, que estão compreendidos no mesmo bloco de recursos, sejam mapeados na mesma porta de antena, e a porta de antena depende de qual subconjunto dos grupos de elementos de recurso é usado para o canal de controle de downlink.
Abstract:
transmissão flexível de mensagens em um sistema de comunicação sem fio com múltiplas antenas de transmissão. trata-se de dispositivos e métodos para transmitir informação em blocos de recurso entre uma estação base e um ou mais dispositivos de comunicação. em cada bloco de recurso (rb) usado para uma transmissão de canal de controle ou dados, uma pluralidade de regiões não sobrepostas de elementos de recurso (res) é definida. cada região está associada com um ou múltiplos símbolos de referência exclusivos (rss), e pode ser ainda associada com uma ou mais portas de antena. quando o equipamento de usuário (eu) demodula a informação que ele recebe em uma região particular de um rb, ele usa o rs e/ou a porta de antena associada com essa região. o rs e/ou a informação de porta de antena pode ser usada, por exemplo, para estimar um canal da rede de comunicação ou demodular e decodificar os dados contidos dentro das regiões associadas.