Patent application number | Description | Published |
20140044206 | METHODS OF MAPPING RETRANSMISSIONS RESPONSIVE TO BUNDLED NACK MESSAGES AND RELATED DEVICES - A method of transmitting data from a network node to a wireless terminal may include transmitting first and second data blocks over respective first and second MIMO layers to the wireless terminal during a first MIMO transmission time interval (TTI). Feedback may be received from the wireless terminal for the first MIMO TTI with the feedback including first and second ACK-NACK codewords that map to the respective first and second MIMO layers. Responsive to the network node being transmit buffer limited for the wireless terminal and responsive to the first ACK-NACK codeword being an ACK and the second ACK-NACK codeword being a NACK, a discontinuous transmission indicator for the first MIMO layer may be transmitted to the wireless terminal, and the second data block may be retransmitted over the second MIMO layer to the wireless terminal during a second MIMO TTI after transmitting the discontinuous transmission indicator. | 02-13-2014 |
20140050161 | METHODS, NETWORK NODE, AND USER EQUIPMENT FOR UPLINK MULTIPLE-INPUT-MULTIPLE-OUTPUT - It is presented a method for controlling uplink multiple-input-multiple-output, MIMO. The method is performed in a network node and comprises the steps of: determining an inter-stream interference between two uplink streams in MIMO, Multiple Inputs Multiple Outputs, transmission; and controlling a selection of E-TFC, Enhanced dedicated transport channel Transport Format Combination, in response to the determined interference. | 02-20-2014 |
20140064189 | USER EQUIPMENT, BASE STATION AND METHODS RELATED TO MULTIPLE INPUT MULTIPLE OUTPUT - It is presented a method for controlling multiple input multiple output, MIMO, pilot channel boosting. The method is performed in a user equipment, UE, capable of MIMO transmissions using a primary and a secondary stream. The method comprising the steps of: determining a rank used for uplink transmissions from the UE; and determining a boosting parameter affecting power boosting of an Enhanced Dedicated Physical Control Channel, E-DPCCH, and a Secondary Dedicated Physical Control Channel, S-DPCCH, based on the rank. A corresponding UE, base station and associated method are also presented. | 03-06-2014 |
20140079144 | Pilot Channel Configuration for MIMO Network - Embodiments of the present disclosure provide methods and apparatus for configuring additional CPICHs, e.g. third CPICH, fourth CPICH, etc., to support MIMO transmissions of rank three or higher. The additional CPICHs may be configured with two or more power levels. A radio network controller (RNC) sends configuration information for the additional CPICHs to a serving base station in a cell to configure the additional CPICHs. The additional CPICHs can be configured to have a fixed power level, or multiple power levels. When the additional CPICHs are configured with multiple power levels, the base station can select the appropriate power level for each CPICH in dependence on current scheduling decisions in order to reduce inference. | 03-20-2014 |
20140334459 | METHODS PROVIDING OFFSET VALUES DEFINING DIFFERENCES BETWEEN MIMO DATA STREAMS AND RELATED CONTROLLERS AND WIRELESS TERMINALS - A method of communicating with a wireless terminal may include providing first information responsive to receiving first and second multiple-input-multiple-output (MIMO) data streams from the wireless terminal through a first antenna array of a first sector during a first transmission time interval. Second information may be provided responsive to receiving the first and second MIMO data streams from the wireless terminal through a second antenna array of a second sector during the first transmission time interval with the first and second sectors being different and the first and second antenna arrays being different. An offset value may be generated responsive to the first information and/or the second information, with the offset value defining a difference between the first and second MIMO data streams for a second transmission time interval, and the offset value may be transmitted to the wireless terminal. | 11-13-2014 |
20150071112 | DISTRIBUTED NODE OPERATION IN HETEROGENEOUS NETWORKS - Systems and methods related to providing spatial reuse gain as well as Multiple-Input-Multiple-Output (MIMO) gains in a combined cell of a heterogeneous cellular communications network are disclosed. In one embodiment, a method of operation of a wireless device includes receiving node-specific pilot signals from transmission nodes in a combined cell, where each node-specific pilot signal is transmitted by a different transmission node in the combined cell. The method further includes generating channel measurements based on the node-specific pilot signals. The channel measurements include a separate channel measurement for each transmission node based on the node-specific pilot signal transmitted by the transmission node. The method further includes selecting a desired combination of nodes from the subset of the transmission nodes based directly or indirectly on the channel measurements and providing an indication of the desired combination of nodes to the central control node for the combined cell. | 03-12-2015 |
20150117407 | Adapting Uplink Transmissions in a Wireless Telecommunications Network - Methods in a node in a wireless telecommunications network are provided. A method in a node in a wireless telecommunications network may include providing an uplink data rate offset value to a serving base station for transmission to a wireless terminal that is in a soft handover. The method may include providing a power budget for the wireless terminal to a non-serving base station of the wireless terminal. Moreover, the method may include providing a Signal-to-Interference-plus-Noise Ratio, SINR, target value to the non-serving base station. Related nodes and wireless terminals are also provided. | 04-30-2015 |
20150229370 | METHOD AND APPARATUS IN A WIRELESS COMMUNICATION SYSTEM - There is disclosed a method performed by a User Equipment, UE, for Hybrid Automatic Repeat Request, HARQ, retransmission of data in a multi-antenna wireless communication system. The method comprises, receiving Acknowledgement/Negative Acknowledgement, ACK/NACK, feedback information relating to data transmitted on two streams, and performing, upon rank reduction where only one stream is available for transmission, retransmission of data on a cancelled stream over the remaining stream. There is furthermore disclosed a UE configured for performing the method. A transmission method together with an arrangement for a UE is also disclosed. | 08-13-2015 |